CN106999819B - It is used to prepare the method for squeezing out carbon block - Google Patents
It is used to prepare the method for squeezing out carbon block Download PDFInfo
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- CN106999819B CN106999819B CN201580062213.XA CN201580062213A CN106999819B CN 106999819 B CN106999819 B CN 106999819B CN 201580062213 A CN201580062213 A CN 201580062213A CN 106999819 B CN106999819 B CN 106999819B
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- carbon block
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- screw rod
- spiral shell
- shell rib
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2055—Carbonaceous material
- B01D39/2058—Carbonaceous material the material being particulate
- B01D39/2062—Bonded, e.g. activated carbon blocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/08—Special characteristics of binders
- B01D2239/086—Binders between particles or fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/10—Filtering material manufacturing
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The method of the carbon block is continuously prepared the present invention relates to porous carbon block and by extrusion method.The carbon block is particularly suitable for water purification installation.The object of the present invention is to provide continuously prepare effective, economic and the good carbon block of ability that dechlorinates method by extrusion method.It has been found by the present inventors that filter capacity and the service life of carbon block can be significantly improved by squeezing out tool in the extruder screw with the specific ratios between the spiral shell rib outer dia of two different pieces of screw rod there are two types of the carbon block of the specific combination of adhesive.
Description
Technical field
The method of the carbon block is continuously prepared the present invention relates to porous carbon block and by extrusion method.The carbon block is especially suitable
It shares in water purification installation.
Background technique
Water is containing there are many pollutants, including particulate matter, chemical substance and microorganism.In order to make water be suitable for consuming, it is necessary to
Purified water and by pollutant removal to level of security.
Not only in urban area, but also in remote village, there is a growing awareness that being consumed after filtering or purification
Water.It is not easy in the village applied in on-line system, being also constantly needed to exploitation has simple manufacturing method and most importantly
The solid problematic cost-efficient gravity feed systems of gravity feed systems are overcome to mention simultaneously to obtain good flow velocity
For effectively removing for particulate pollutant.
For providing the desired filtering of pollutant from the water comprising microorganism such as packing and bacterium, while in gravity flowing
Under the conditions of desired high flow rate, active carbon by selecting size distribution and viscous with selected melt flow characteristics are provided always
Carbon block made from mixture material is known.Carbon block can also be used for adsorbing and removing organic matter, taste and the smell of dissolution.
Carbon block is usually manufactured by using the briquetting process of active carbon and adhesive.Have in briquetting process
Limitation, such as a large amount of mold needs, the long manufacturing cycle, and this method is labour-intensive.
WO2005094966A1 (Unilever, 2005) disclose for gravity fed filtration device carbon block filter medium and
Method by being compacted prepare the carbon block filter medium, the carbon block filter medium have Powdered Activated Carbon (PAC) and melt
Adhesive material of the flow rate (MFR) less than 5 grams/10 minutes, the size distribution of the Powdered Activated Carbon make 95 weight %
Particle pass through 200 mesh by 50 mesh, and no more than 13 weight %.The method for being used to prepare carbon block filter medium is included in mixing
Powdered Activated Carbon is closely mixed in device, the compacting mixture in vibratile compacter with adhesive material, is not more than by applying
20kg/cm2Pressure mixture is compacted in the mold with intended shape and size, mold is heated to selected temperature,
Cooling mold simultaneously discharges carbon block from mold.
US2009/0274893A1 (Filtrex Holdings PTE Ltd., 2009) is disclosed to be used for continuously squeezing out
In the method and apparatus for the tubular active carbon for crossing drainage.By the mixture of active carbon and polymer adhesive by sliding slot gravity into
Expect in extruder barrel to promote uniform feeding and prevent bridge joint (bridging).In order to prevent active carbon with it is polymer-bonded
Agent separation makes the electrification of polymer adhesive surface to be connected on carbon with low force by plasma method.Pass through induction heating
Carry out heating cylinder to promote high and constant heat source.In order to effectively be processed, adhesive be surface-modified or plasma at
Reason with generated before being mixed with carbon dust surface charge be it is necessary, otherwise carbon and adhesive will separate, or may be in cylinder
It is middle to there is bridge joint.Block is made using 40 mesh (420 microns) to 320 mesh (45 microns).This method needs additional adhesive surface
Modification procedure.
We have now found that there is the carbon block of the specific combination of two kinds of adhesive by extrusion molding, it can
To significantly improve filter capacity and the service life of carbon block.Preferably see, when carbon block has two different pieces in screw rod
Spiral shell rib (flight) outer dia between specific ratios extruder screw in when squeezing out, carbon block has improved spy
Property.
It has also been found that can be used active carbon of the granularity in 50 to 1400 micron ranges obtain have it is expected filter capacity with
The preferred carbon block in service life.It has furthermore been found that this method also eliminate to for by the mixture of active carbon and adhesive from charging
Device is moved to the needs of the additional auger screw of the cylinder of extruder.
It is an object of the present invention to provide a kind of effective, economic and dechlorination good carbon blocks of ability.
It is a further object to provide one kind for continuously preparing effective, economic and dechlorination energy by extrusion method
The method of the good carbon block of power.
A further object of the present invention is to provide a kind of for by providing work of the granularity in 50 to 1400 micron ranges
Property charcoal pass through extrusion method prepare carbon block method.
A further object of the present invention is at least some of improvement prior art document disadvantage.
Summary of the invention
According to the first aspect of the invention, a kind of method of extruding cellular carbon block in screw extruder is disclosed, it is described
Screw extruder has cylinder, and the cylinder has entrance at one end and the extrusion die in the other end, the method includes
Following steps:
(i) active carbon and adhesive are mixed to form mixture；
(ii) mixture is fed in the entrance of the cylinder, the cylinder includes screw rod, and the screw rod has
The feeding part of the neighbouring entrance and heating part close to the extrusion die, the screw rod along the cylinder inside
It is rotatably mounted；
(iii) screw rod is rotated to mix the mixture, and the mixture is straight outside the first spiral shell rib from having
The feeding part of the screw rod of diameter is transported to the heating part of the screw rod with the second spiral shell rib outer dia；
(iv) in conveying by heating the mixture during heating part, the heating part includes neighbouring
The metering section of the extrusion die and the compression section between the feeding part and the metering section；
(v) cooling mixture during being extruded through the mold,
Wherein described adhesive includes that low density polyethylene (LDPE) and melt flows of the ratio within the scope of 70:30 to 30:70 refer to
The mixture of polymer of the number less than 5 grams/10 minutes.
A kind of porous carbon block of extrusion molding, it includes:
(i) active carbon；
(ii) adhesive, described adhesive include low density polyethylene (LDPE) and melt of the ratio within the scope of 30:70 to 70:30
The mixture of polymer of the flow index less than 5 grams/10 minutes.
According to the third aspect of the invention we, disclose can by according to the method for first aspect obtain according to second party
The porous carbon block in face.
Brief Description Of Drawings
The present invention is further described now with reference to attached drawing.
Fig. 1 is the longitdinal cross-section diagram of the cylinder according to the present invention including single screw extrusion machine.
Fig. 2 is the side view of the screw rod of the screw extruder of Fig. 1.
Attached drawing detailed description
With reference to Fig. 1, the longitdinal cross-section diagram of single screw extrusion machine is shown, the single screw extrusion machine has cylindrical tube
(1), wherein solid or hollow screw rod (2) extends and is rotatably mounted along the whole length of cylinder.Cylinder has at one end
Have entrance (3), and there are extrusion die (8) in the other end.Screw rod (2) has one or more convex ridges of referred to as spiral shell rib (4)；
Spiral shell rib is on the surface for being helically disposed in screw rod.The surface for the screw rod that spiral shell rib is protruded above from it is known as screw shaft (5).According to this
The entrance (3) being connected to screw rod (2) is preferably poured into the charging of the mixture of the active charcoal and adhesive of invention from hopper (6)
In.
Hopper (6) preferably has Cylindrical top portion and the frustoconical portion in bottom.Preferably, the side wall of hopper
It is greater than internal friction angle with the angle for being known as cone angle of horizontal plane.Cone angle is the tapered sidewalls measurement from the horizontal plane of cylinder to hopper
Angle.In order to improve the flowing of material, the cone angle in the present invention is preferably at least 30 °, more preferably at least 35 °, even more preferably from
At least 40 °, most preferably at least 45 °.In order to improve the flowing of material, the cone angle in the present invention is preferably smaller than 80 °, more preferably less than
70 °, more preferably less than 60 °, more preferably less than 50 °.The slant height of hopper is preferably 0 to 300 millimeter.
Charging from entrance (3) is mixed, fusing before being extruded through extrusion die (8) along the length of screw rod
And conveying.Heating device (9) is installed around the outer surface of cylinder (1), for melting charging in operation.The appearance of extrusion die
Face is surrounded by the collet (10) containing the cooling liquid for the cooling extruded fusing charging by mold.
With reference to Fig. 2, there is the feeding part of neighboring entry (showing in 3, Fig. 1) according to the screw rod (2) of preferred embodiment
(A) and close to extrusion die heating part (B and C).Heating part has the metering of neighbouring extrusion die (8, as shown in Figure 1)
Partially (C) and the compression section (B) between feeding part (A) and metering section (C).Compression unit (B) and metering section (C) one
It rises and forms heating part.Feeding part (A) has constant spiro edge height (D), metering between screw shaft (5) and spiral shell rib top
Partially (C) has the spiro edge height (E) that gradually increases, and compression section (B) has constant spiro edge height (F), with into
Height is compared with metering section (C) and is substantially reduced in material part (A).
Feeding part (A) accounts for the 26% of screw rod total length.It is preferably received from hopper (6) by entrance (3) and is fed.At this
In part, the overall diameter of screw shaft (5) is all wider than the overall diameter of the screw shaft (5) in all further parts, and the overall diameter of axis is
48 millimeters.Compared with any of further part, the overall diameter (the first spiral shell rib outer dia) of spiral shell rib is also longest.First
Spiral shell rib outer dia is measured as 94.5 millimeters.In feeding part, inner barrel diameter measurement is 97 millimeters.The depth of screw channel
Degree, is the vertical range (not shown) between the screw shaft of the extruder of feeding part and the inner surface of cylinder, is greater than screw rod
(2) depth of the screw channel in all further parts.It is measured as the depth of the screw channel in 24.5 millimeters of feeding part
Degree provides high material delivery rate for the feeding part of screw rod, and particle is caused to be compacted and compress.Feeding part will
It feeds towards the further part of screw rod and conveys.In the portion, not heating material, but be compacted and compression material.Feeding part
In screw rod have and be measured as 86 millimeters of constant pitch and be measured as 23.25 millimeters of substantially constant spiro edge height
(4)。
The downstream feeding part (A) is the heating part with compression section (B).The length of compression section is screw rod total length
27%.Preferably, the spiro edge height of compression section is most short, and the height is heating on the direction towards extrusion die
It is gradually increased in part.In compression section, screw rod spiro edge height (4) drops sharply to 7.91 millimeters, and screw channel
Depth also becomes more shallow than the feeding part (A) of front.The depth measurement of screw channel is 8.25 millimeters.Cylinder in compression section
Internal portion's diameter measurement is 62.5 millimeters.In the portion, the second spiral shell rib outer dia is reduced to 62 millimeters, and screw pitch reduces
To 61 millimeters.Adhesive starts to melt in the portion；Fusing is initially in the film of melt adhesive and filling adhesive particle
Interface between Solid Bed occurs.When melting continuation, solid bed breakup, and the little particle of solid binder particles becomes
It is dispersed in the main body of melt adhesive.The heat generated due to being mounted on the external heater assembly (9) of extruder barrel (1)
And the combination effect for the shearing force (causing the friction between the inner wall of extruder barrel and adhesive) that screw rod is subjected to adhesive
It answers, the fusing of adhesive occurs.Fusing makes adhesive soften to the degree that it flows freely and any shape will be presented.
Metering section (C) is after compression section (B), with and without central transition section.In general, metering section receives
The charging being completely melt.In the portion, molten material at a temperature of stablize, further mixing, and deliver under stress,
Final mixing or kneading stages are usually delivered to before leaving cylinder.
Metering section accounts for the 47% of screw rod total length.Metering section (C) plays the adhesive of softening is defeated as extrudate
The effect of the downstream by extruder is sent and is pumped out, the downstream is usually extrusion die (8) or some other shapes
The limited hole of formula.In the portion, axis outer dia becomes narrow gradually on the direction towards extrusion die.Therefore, in measurement unit
In point, channel depth gradually increases on the direction towards mold.Inner barrel diameter measurement in metering section is 62.5 millis
Rice.The second spiral shell rib outer dia and screw pitch in metering section and compression section are substantially constant.The length of metering section
The spiro edge height of the first half be measured as 13.9 millimeters, and closer to the length of the metering section of extrusion die the other half
Spiro edge height is measured as 24 millimeters.
Preferably, the ratio of the spiro edge height of the spiro edge height and metering section of compression section is 1:1.8 to 1:3.It is preferred that
Ground, the spiro edge height in metering section gradually increase on the direction towards extrusion die.
Specific embodiment
Refer to weight percent in the statement weight % that specification uses everywhere.
Single screw extrusion machine:
Screw extruder usually has at least three different pieces, the function of executing corresponding to each part.The function
Including Solid Conveying and Melting, fusing and melt conveying.Solid Conveying and Melting occurs in feeding part.Fusing and melt conveying generation are being heated
In part.Heating part includes the compression section after feeder.Fusing occurs mainly in compression section, although being melted in
It is not necessarily completed at the part end.Melt conveying occurs in metering section, although fusing can continue in the portion.Meter
It melts last particle and mixes to uniform temperature and composition in amount part.
The method of extruding cellular carbon block in screw extruder:
According to the first aspect of the invention, a kind of method of extruding cellular carbon block in screw extruder is disclosed.
Screw extruder has cylinder, and the cylinder has entrance at one end and has extrusion die in the other end.System
The method of standby carbon block preferably includes active carbon and adhesive being mixed to form mixture.Adhesive include ratio 30:70 extremely
The mixture of the polymer of low density polyethylene (LDPE) and melt flow index less than 5 grams/10 minutes within the scope of 70:30.Active carbon
With adhesive preferably in horizontal belt blender and mixing.In order to obtain uniform mixture, mixing in blender preferably with
20 revs/min of speed carries out 10 minutes.Next step includes being fed to mixture in the entrance of the cylinder including screw rod.It is excellent
The amount of selection of land, the mixture being fed in the entrance of cylinder is applied to 3.4 × 104N/m2To 1.59 × 105N/m2Pressure in range
Power.Preferably, mixture, which applies, is not more than 1.4 × 105N/m2, more preferably no more than 1.25 × 105N/m2, further preferably it is not more than
1.0×105N/m2Pressure, but preferably, mixture, which applies, is not less than 7.5 × 104N/m2, more preferably no less than 5.0 × 104N/
m2, further preferably it is not less than 4.5 × 104N/m2, more preferably no less than 3.0 × 104N/m2Power.Preferably feed the pressure of application
It is maintained between expected range, the range provides carbon block continuously squeezing out, with uniform expectation porosity.By mixture
It is fed in the entrance of the cylinder of the screw rod of the heating part with feeding part and close extrusion die including neighboring entry
Later, screw rod is rotatably mounted along inner barrel, and next step includes rotary screw with blend mixture, and by mixture
The heating of the screw rod with the second spiral shell rib outer dia is transported to from the feeding part of the screw rod with the first spiral shell rib outer dia
Part.Preferably, the ratio of the second spiral shell rib outer dia and the first spiral shell rib outer dia is 1:1.2 to 1:1.75, is more preferably compared
Rate is 1:1.4 to 1:1.6, best ratio 1:1.5.
Preferably, the length of the part of the screw rod with the first outside spiral shell rib diameter with the second outside spiral shell rib diameter
The ratio of the length of the part of screw rod is 1:1.5 to 1:3, more preferable 1:1.5 to 1:2, most preferably 1:1.9.The spiral shell of heating part
Ratio away from the screw pitch with feeding part is within the scope of 1:1.3 to 1:1.5, and more preferable ratio is 1:1.4 to 1:1.5, most preferably
1:1.4。
Subsequent step includes heating mixture during heating part of the conveying by screw rod.The heating part of screw rod
Including compression section and metering section.Metering section is adjacent to mold, and compression section is between feeding part and metering section.
Heating device of the heating of mixture preferably by means of being mounted on the outer surface of cylinder.Heating device is preferably induction heating
Coil.Preferably, heat the mixture to the temperature within the scope of 90 DEG C to 260 DEG C, more preferably heat the mixture to 100 to
Temperature within the scope of 200 DEG C, even more preferably from the temperature being heated within the scope of 125 to 150 DEG C.Preferably, in the heating part of screw rod
100 DEG C of temperature are heated the mixture in the compression section divided.Subsequent step is included in be extruded through mold during it is cooling
Mixture.The cooling of mixture is preferably the coolant liquid by means of recycling inside the cooling jacket for surrounding extrusion die.It will squeeze
The temperature being cooled to out by the mixture of mold within the scope of 10 DEG C to 70 DEG C.According to the shape of desired carbon block, extrusion die
It can have any shape.Preferably, mold is the form of cylindrical body, and the axis of screw rod extends along mold；This is provided
Cylindrical, hollow carbon block.
The specific size of screw rod can be determined empirically, be calculated or be led to using normal equation designed according to this invention
It crosses and is determined using shelf computer program.
Porous carbon block
According to second aspect, a kind of porous carbon block of the extrusion molding of active charcoal and adhesive is disclosed, it is described viscous
Mixture includes low density polyethylene (LDPE) and melt flow index of the ratio within the scope of 30:70 to 70:30 less than 5 grams/10 minutes
The mixture of polymer.
Active carbon
Active carbon particle is preferably selected from one of bituminous coal, cocoanut shell, timber and petroleum tar or a variety of.It is preferably living
The surface area of property charcoal particle is more than 500m2/ g, more preferably above 1000m2/g.The preferably dimensional homogeneity of active carbon particle
Coefficient is less than 2, and more preferably less than 1.5.Preferably carbon tetrachloride (the CCl of active carbon particle4) count more than 50%, it is more preferably super
Cross 60%.Preferably, the iodine number of active carbon particle is greater than 800, more preferably greater than 1000.Preferably not greater than 5% activity
Charcoal particle is by 150 meshes, and the particle no more than 5% stays in 12 meshes.It may further be preferable that being not more than 5 weights
The active carbon particle of % is measured to stay in 30 meshes by 75 meshes, and no more than 5 weight %.It is particularly preferred to be less than 1%
Active carbon particle pass through 200 meshes.Preferably, the size distribution of active carbon is 50 microns to 1400 microns.
Adhesive
Adhesive includes low density polyethylene (LDPE) and melt flow index of the ratio within the scope of 70:30 to 30:70 less than 5
Gram/mixtures of 10 minutes polymer.Preferably ratio is within the scope of 60:30 to 30:60, more preferably in 60:40 to 40:
In 60 ranges, most preferably 50:50.The ratio of the polymer of low density polyethylene (LDPE) and melt flow index lower than 5 grams/10 minutes
Preferably weight ratio.
Low density polyethylene (LDPE) (LDPE):
Disclosed carbon block has low density polyethylene (LDPE) adhesive.Suitable adhesive includes being used as LUPOLENTMIt (comes from
Basel Polyolefins) sale LDPE and come from Qunos (Australia) LLDPE.
Polymer of the melt flow index less than 5 grams/10 minutes:
Disclosed carbon block have melt flow index (MFR) less than 5 grams/10 minutes, preferably smaller than 2 grams/10 minutes, more
Preferably smaller than 1 gram/10 minutes polymer.The bulk density of polymer of the melt flow index less than 5 grams/10 minutes is preferably small
In or equal to 0.6g/cm3, more preferably less than or equal to 0.5g/cm3, most preferably equal to 0.25g/cm3.Melt flows refer to
Preferred polymers of the number less than 5 grams/10 minutes are selected from ultra-high molecular weight polyethylene or ultrahigh molecular weight polypropylene.Their molecule
Amount is preferably 106Dalton is to 109Within the scope of dalton.Polymer of the melt flow index less than 5 grams/10 minutes can be with such as
Commercially available from lower trade name: HOSTALENTM, come from Tycona GMBH, GUR, SUNFINETM(coming from Asahi, Japan), HIZEXTM
(coming from Mitsubishi) and come from Brasken Corp (Brazil).
Use the melt flow rate (MFR) of ASTM D 1238 (ISO (International Organization for standardization) 1133) test measurement adhesive.
The test measures melt polymer under specific temperature and loading condition and passes through the flowing of extrusion plasticorderr.Plasticorderr is squeezed out by hanging down
Right circular cylinder composition, cylindrical body have 2 millimeters of small mold in bottom, there is removable piston at top.
One batch of material is placed into cylindrical body and is preheated several minutes.Piston is placed into the top of melt polymer, and
And its weight forces polymer through mold and reaches on collecting board.For testing polymeric adhesive material of the invention
Temperature can choose at 190 DEG C, and loads and can choose at 15kg.The polymerization that weighing is collected after specified time interval
The amount of object, and it is normalized to the grams that can have been squeezed out in 10 minutes；Therefore, melt flow rate (MFR) with gram/indicate within 10 minutes.
Preferably the ratio of active carbon and adhesive is 2:1 to 10:1 parts by weight, more preferable 2:1 to 8:1 parts by weight.
According to the third aspect of the invention we, disclose can by according to the method for first aspect obtain according to second party
The porous carbon block in face.
Embodiment
Embodiment 1: the method for carbon block is prepared in screw extruder according to disclosed invention
From (at 190 DEG C, the 16MM440 grade of 30MFI comes from Reliance with 1kg low density polyethylene (LDPE) adhesive
Industries Limited, India) and the 1kg super high molecular weight polymer adhesive that melt flow index is 0 at 190 DEG C
(4120 grades of Gur, come from Ticona) mix 10 minutes with 40 revs/min of speed in horizontal belt blender to be mixed
The 10kg Powdered Activated Carbon (granularity is 250 microns to 500 microns) for closing object prepares porous carbon block.
By the charging of the hopper feed above feeding part of the mixture by being located at screw extruder to screw extruder
In part, as shown in Figure 1.The level for keeping mixture in hopper, so that it applies 3.4 × 10 on the entrance in cylinder4N/m2
To 1.59 × 105N/m2Pressure in range.Screw extruder has the screw rod being rotatably mounted along the inside of cylinder.Into
The the first outside spiral shell rib diameter for expecting the screw rod in part is 94.5 millimeters, and spiro edge height is 23.5 millimeters.Feeding part is long
It is 324 millimeters, and screw pitch is 86 millimeters.After mixture is fed in feeding part, subsequent heat part is opened immediately
In surround the heating coil of cylinder, and temperature is set as 150 DEG C.Second spiral shell rib outer dia of heating part is 62 millimeters.Add
Hot part has the compression section of neighbouring feeding part, followed by metering section.When 100 DEG C of thermograph in compression section
When temperature, screw rod is rotated with 10 revs/min of speed.Mixture is transported to subsequent compression section from feeding part by screw rod
In.In compression section, external spiral shell rib diameter measurement is 62 millimeters, and spiro edge height is more shallow than feeding part, and is measured as
7.91 millimeter.More shallow spiro edge height allows mixture as the temperature in compression section is due to rubbing and heating coil generation
The combination of heat is increased to 100 DEG C and forms the agglomerate reunited.The agglomerate of reunion is transported to phase from compression section by rotary screw
Adjacent metering section.The second outside spiral shell rib diameter in metering section is constant, and identical as the compression section of front.Meter
Spiro edge height in amount part gradually increases on the direction of extrusion die.The length of heating part is 873 millimeters.The group of reunion
The temperature of block further increases in metering section, and when the temperature in heating part reaches 150 DEG C of setting, makes to cool down
Water enters the cooling jacket for surrounding extrusion die with 3 to 5 liters/min of rate.The block-shaped reunion of porous carbon is presented now
Agglomerate is extruded through extrusion die from metering section, cooling simultaneously.
The temperature of the agglomerate of the extrusion come out by mold is 50 to 65 DEG C.The agglomerate of extrusion is then cooled to room temperature and is cut
At desired length.
Embodiment 2: the comparison of preferred carbon block and the chlorine removal rate for comparing carbon block
The preparation of carbon block: carbon block and comparative example of the invention are prepared using the active carbon and adhesive of amount as shown in Table 1.
All embodiments shown in table 1 are prepared using screw extruder as described in example 1 above.
The filtering of water: carbon block shown in table 1 is used for the filtering of water in gravity fed filtration device.
The method for measuring chlorine removal rate:
Sample solutions of chlorine: the processing water of the 50mL after porous carbon block as shown in Table 1 will be filtered through with 2 and drip 5% acetic acid and 2
Drip purple (Leucicrystal violet) the indicator mixing of leucine.
Standard sample: the standard containing 50ppb, 100ppb, 200ppb and 500ppb chlorine is prepared from 8% hypochlorite solutions
Sample.
Spectrophotometer measurement: ultraviolet-uisible spectrophotometer (Shimadzu UV 1800) is carried out using standard sample
Standardization.Measurement is filtered through the chlorinity of carbon block according to the present invention and the water by comparing carbon block, and is surveyed using standard drawing
Surely the chlorinity in water is handled.
It records the chlorinity calculated and shows in table 1 below.
Drop test: describedThe integrality of block is measured by drop test.5 identical carbon blocks are packaged in corrugated case
In.Corrugated case with 5 carbon blocks is fallen from 1.2 meters of high perpendiculars.Check the rupture of each of 5 carbon blocks.
If at least one carbon block ruptures in 5, report that carbon block fails to pass through test.When all 5 carbon blocks are all intact, pass through
Test.
Table 1
Data in table 1 show, and only with LDPE (embodiment a) or only (carbon block of embodiment d) should with UHMPE
(embodiment b, embodiment c) are compared the carbon block that the two combines except disclosed ratio, when the adhesive tool in porous carbon block
(embodiment 1, embodiment 3, embodiment 4, is implemented embodiment 2 when the combination of the LDPE and UHMPE of with good grounds ratio of the invention
Example 5), the chlorine removal rate of carbon block increases.
Table 2
Data confirm that in table 2, and only with LDPE (embodiment a) or only (carbon block of embodiment d) should with UHMPE
(embodiment b, embodiment c) are compared the carbon block that the two combines except disclosed ratio, when the adhesive tool in porous carbon block
(embodiment 1, embodiment 3, embodiment 4, is implemented embodiment 2 when the combination of the LDPE and UHMPE of with good grounds ratio of the invention
Example 5), it is higher by the flow velocity of carbon block.Carbon block according to the present invention can be held in screw extruder by fall-down test
It changes places processing.
Claims (15)
1. a kind of method of the extruding cellular carbon block in screw extruder, the screw extruder have be equipped at one end entrance and
It is equipped with the cylinder of extrusion die in the other end, the described method comprises the following steps:
(i) active carbon and adhesive are mixed to form mixture；
(ii) mixture is fed in the entrance of the cylinder, the cylinder includes screw rod, and the screw rod has neighbouring
The heating part of the feeding part of the entrance and the close extrusion die, the screw rod can be revolved along the inside of the cylinder
Turn ground installation；
(iii) screw rod is rotated to mix the mixture, and by the mixture from the first spiral shell rib outer dia
The feeding part of the screw rod is transported to the heating part of the screw rod with the second spiral shell rib outer dia；
It (iv) include neighbouring described by heating the mixture, the heating part during heating part in conveying
The metering section of extrusion die and the compression section between the feeding part and the metering section；
(v) cooling mixture during being extruded through the mold,
Wherein described adhesive includes low density polyethylene (LDPE) and melt flow index of the weight ratio within the scope of 30:70 to 70:30
The mixture of polymer less than 5 grams/10 minutes.
2. according to the method described in claim 1, wherein the second spiral shell rib outer dia and the first spiral shell rib outer dia
Ratio be 1:1.2 to 1:1.75.
3. method according to claim 1 or 2, wherein the length of the part of the screw rod with the first outside spiral shell rib diameter
The ratio of degree and the length of the part of the screw rod with the second outside spiral shell rib diameter is 1:1.5 to 1:3.
4. method according to claim 1 or 2, wherein the low density polyethylene (LDPE) is less than with the melt flow index
The weight ratio of 5 grams/10 minutes polymer is 50:50.
5. method according to claim 1 or 2, wherein the polymer of the melt flow index less than 5 grams/10 minutes
Selected from ultra-high molecular weight polyethylene (UHMWPE) or ultrahigh molecular weight polypropylene (UHMWPP).
6. method according to claim 1 or 2, wherein the screw pitch of the heating part and the screw pitch of the feeding part
Ratio is within the scope of 1:1.3 to 1:1.5.
7. method according to claim 1 or 2, wherein the spiro edge height of compression section is most short, and the height is along court
It is gradually increased in the heating part to the direction of the extrusion die.
8. according to the method described in claim 7, the wherein spiral shell rib of the spiro edge height of the compression section and the metering section
The ratio of height is 1:1.8 to 1:3.
9. method according to claim 1 or 2, wherein the mixture is heated to the temperature within the scope of 90 DEG C to 260 DEG C
Degree.
10. method according to claim 1 or 2, wherein extrusion die is cooled to the temperature within the scope of 10 DEG C to 70 DEG C.
11. method according to claim 1 or 2, wherein the mixture apply 3.4 in the inlet of the cylinder ×
104N/m2To 1.59 × 105N/m2Pressure.
12. a kind of porous carbon block of extrusion molding, it includes:
(i) active carbon；
(ii) adhesive, described adhesive include low density polyethylene (LDPE) and melt flow of the weight ratio within the scope of 30:70 to 70:30
The mixture of dynamic polymer of the index less than 5 grams/10 minutes.
13. the porous carbon block of extrusion molding according to claim 12, wherein low density polyethylene (LDPE) and melt flow index
The weight ratio of polymer less than 5 grams/10 minutes is 50:50.
14. the porous carbon block of extrusion molding according to claim 13, wherein the melt flow index less than 5 grams/
10 minutes polymer are selected from ultra-high molecular weight polyethylene (UHMWPE) or ultrahigh molecular weight polypropylene (UHMWPP).
15. porous carbon block according to claim 12, wherein the porous carbon block can be by according to claim 1 to 11
Any one of described in method obtain.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14194546.9 | 2014-11-24 | ||
| EP14194546 | 2014-11-24 | ||
| PCT/EP2015/074962 WO2016083062A1 (en) | 2014-11-24 | 2015-10-28 | A method for preparing an extruded carbon block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106999819A CN106999819A (en) | 2017-08-01 |
| CN106999819B true CN106999819B (en) | 2019-07-05 |
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ID=51932284
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580062213.XA Active CN106999819B (en) | 2014-11-24 | 2015-10-28 | It is used to prepare the method for squeezing out carbon block |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN106999819B (en) |
| PH (1) | PH12017500775A1 (en) |
| WO (1) | WO2016083062A1 (en) |
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| CN103237467A (en) * | 2010-10-15 | 2013-08-07 | 塞拉尼斯醋酸纤维有限公司 | Apparatuses, systems, and associated methods for forming porous masses for smoke filter |
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| US5249948A (en) * | 1991-04-08 | 1993-10-05 | Koslow Technologies Corporation | Apparatus for the continuous extrusion of solid articles |
| RU2171744C1 (en) * | 2000-09-28 | 2001-08-10 | Общество с ограниченной ответственностью "Аквафор" | Method and device for continuous extrusion of filter elements |
| US20090274893A1 (en) * | 2008-04-30 | 2009-11-05 | Filtrex Holdings Pte Ltd. | Method for manufacturing carbon blocks |
-
2015
- 2015-10-28 CN CN201580062213.XA patent/CN106999819B/en active Active
- 2015-10-28 WO PCT/EP2015/074962 patent/WO2016083062A1/en active Application Filing
-
2017
- 2017-04-26 PH PH12017500775A patent/PH12017500775A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1030680A (en) * | 1964-04-23 | 1966-05-25 | Rembrandt Tobacco Mfg Corp Of | Cigarette filters |
| CN1933890A (en) * | 2004-03-16 | 2007-03-21 | 荷兰联合利华有限公司 | Filter media |
| CN101117017A (en) * | 2007-09-14 | 2008-02-06 | 武汉工程大学 | Ultrahigh molecular weight polyethylene tube single screw extruder barrel forming method and the forming device thereof |
| KR20090048928A (en) * | 2007-11-12 | 2009-05-15 | 조재선 | Manufacturing method of activated carbon filter for purifying water and activated carbon filter thereof |
| CN103237467A (en) * | 2010-10-15 | 2013-08-07 | 塞拉尼斯醋酸纤维有限公司 | Apparatuses, systems, and associated methods for forming porous masses for smoke filter |
| CN103071464A (en) * | 2011-10-26 | 2013-05-01 | 爱特威技术股份有限公司 | Carbon block filter formed from divided particles of binder and activated carbon and manufacturing method therefor |
| CN104003488A (en) * | 2014-06-03 | 2014-08-27 | 厦门建霖工业有限公司 | Compound antibacterial activated carbon rod and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016083062A1 (en) | 2016-06-02 |
| PH12017500775A1 (en) | 2017-10-09 |
| CN106999819A (en) | 2017-08-01 |
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