CN101898115B - Filter medium, preparation method thereof, filter element and water purification device - Google Patents
Filter medium, preparation method thereof, filter element and water purification device Download PDFInfo
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- CN101898115B CN101898115B CN2009101386963A CN200910138696A CN101898115B CN 101898115 B CN101898115 B CN 101898115B CN 2009101386963 A CN2009101386963 A CN 2009101386963A CN 200910138696 A CN200910138696 A CN 200910138696A CN 101898115 B CN101898115 B CN 101898115B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention discloses a preparation method of a filter medium for removing acrylonitrile in water, which comprises the following steps: a) mixing polyethylene with ultra-high molecular weight, activated carbon, attapulgite powder, copper powder and a pore-generating agent, wherein the weight ratio of the polyethylene with the ultra-high molecular weight to the activated carbon to the attapulgite powder to the copper powder to the pore-generating agent is 200-300: 90-240: 100-200: 5-20: 100-120; and b) pressing the mixture obtained in the step a) in a die, sintering and cooling. The invention further discloses the filter medium prepared by utilizing the preparation method, a filter element utilizing the filter medium and a water purification device. Compared with the prior art, the filter medium has the advantages of being capable of removing the acrylonitrile in the water, leading the removal rate to be more than 95-99% and further achieving the purpose of improving the water quality; furthermore, the method is simple, raw materials for preparing the filter medium are wide, and the cost is low.
Description
Technical field
The present invention relates to a kind of filter medium of removing acrylonitrile in the water and preparation method thereof, use the filter core and the purifier of this filter medium.
Background technology
Industry and developing rapidly of agricultural cause water resource to be seriously damaged, industrial wastewater discharge is in rivers, lake, agricultural chemicals, agrochemical be the discharging wantonly of use and house refuse and sanitary wastewater in a large number, the water quality variation that these all cause underground water and surface water causes producing in the water a lot of harmful materials.Water pollutes more and more becomes the severe problem that influences people's life.
Acrylonitrile is a colourless liquid, and boiling point is 78 ℃. molecular structural formula is CH
2=CH-C ≡ N.Acrylonitrile is important organic synthesis raw material.Acrylonitrile is a large amount of is applied to coating, adhesive, medicine etc., also is used for synthetic fibers, ABS and AS resin, synthetic acrylonitrile-butadiene rubber, synthetic adiponitrile, acrylamides etc. such as synthetic acrylic fibers.All contain acrylonitrile etc. in the waste water of above production application department, surface water in its vicinity and underground water all can be subjected to pollution in various degree, some people is polluted by acrylonitrile because of long-term drinking water, headache, dizziness, epigastric discomfort, nauseating, vomiting, numb in every limb occur, even haziness in short-term occurs.Acrylonitrile is to introduce one of compound of toxicity maximum in the water environment voluntarily in the human being's production life, the incretion interferent of being confirmed both at home and abroad, it can influence the most basic reproductive function of animal, disturbs the hormone molecule, causes the disease of reproduction, growth and genetic aspect.China also lists it in " blacklist " of priority pollutants in the water body.
Acrylonitrile belongs to small organic molecule.Conventional handling technology of water supply relatively poor or not removal effect basically to its removal effect.The handling technology of water supply of the routine of mentioning here comprises oxidant oxidation method (chlorine oxidation, chlorine dioxide oxidation, hydrogen peroxide oxidation, ozone oxidation etc.), electrolysis, bioanalysis etc.Also there is not at present a kind of preparation method can prepare fine removal effect to acrylonitrile filter medium.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method of filter medium that is used for removing the water acrylonitrile, when the filter medium that utilizes this preparation method to prepare is used for removing the acrylonitrile of water, and the clearance height.
In order to solve above technical problem, the present invention adopts following technical scheme:
A kind of preparation method of filter medium that is used for removing the water acrylonitrile comprises the steps:
A) will comprise ultra-high molecular weight polyethylene, active carbon, attapulgite powder, copper powder and gas generation agent, the weight ratio of described ultra-high molecular weight polyethylene, active carbon, attapulgite powder, copper powder and gas generation agent is: 200～300: 90～240: 100～200: 5～20: 100～120;
B) mixture of step a) gained is suppressed sintering, cooling in mould.
Preferably, the weight ratio of described ultra-high molecular weight polyethylene, active carbon, attapulgite powder, copper powder and gas generation agent is: 280～290: 110～120: 100～110: 14～15: 100～110.The inventor finds, the weight ratio of described ultra-high molecular weight polyethylene, active carbon, attapulgite powder, copper powder and gas generation agent is in this scope the time, and the filter medium of preparation is significantly improved to the clearance of acrylonitrile.
Described ultra-high molecular weight polyethylene is a weight average molecular weight greater than 1,000,000 polyethylene, and preferably using weight average molecular weight is 250～4,000,000 polyethylene.Ultra-high molecular weight polyethylene can obtain from domestic production producer, and the product of M-I (molecular weight is 150 ± 500,000), M-II (molecular weight is 250 ± 500,000), M-III (molecular weight is 350 ± 500,000), M-IV specifications such as (molecular weight are greater than 4,000,000) can be provided as Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be.An effect of ultra-high molecular weight polyethylene is bonding and the effect that forms the filter medium skeleton, utilizes ultra-high molecular weight polyethylene to pass through compacting in addition, and the filter medium that sintering obtains forms micropore easily, can play the effect of acrylonitrile in the adsorbed water.The particle diameter of ultra-high molecular weight polyethylene is 89～104 microns.
Active carbon is a kind of porous material, and it has as cellular pore structure, huge specific area, special surface functional group, stable physics and chemical property, is good adsorbent, catalyst or catalyst carrier.Can be divided into wood activated charcoal according to raw material sources different activities charcoal, as cocoanut active charcoal, apricot shell active carbon, wooden burgy etc.; The mineral raw material active carbon is the active carbon that raw material is made as various coals and oil and elaboration products thereof; The active carbon that other raw material is made, the active carbon of making as scrap rubber, waste plastics etc.Be that the active carbon intensity in source is higher, absorption property is better wherein with the coconut husk material.The specific area of preferred active carbon is not less than 500 meters squared per gram, more preferably is not less than 1000 meters squared per gram.
Active carbon is impurity, the especially medical activated carbon in the adsorbed water efficiently, and as the product by the relevant drug surveilance standard of country, impurity content is lower, and surface area is bigger, and adsorption effect is also better.Select for use medical activated carbon can guarantee that filter medium is directly used in the processing of drinking water.In addition, the employing particle diameter is 74～89 microns a medical activated carbon, can be better to the adsorption effect of acrylonitrile.
Attapulgite is a monoclinic system, and its desirable chemical formula is; Mg
5(H
2O)
4[Si
4O
10]
2(OH)
2, the chemical composition theoretical value is MgO 23.83%, SiO
256.96%, H
2O 19.21%.The attapulgite of occurring in nature often has Al
3+, Fe
3+Deng isomorphous replacement, rich Al
3+, Fe
3+Mutation be called aluminium attapulgite and iron attapulgite.Composition as the aluminium attapulgite powder of the Dragon King of Xuyi County, Jiangsu Province mountain products is SiO
258.38%, MgO 12.10%, Al
2O
39.50%, CaO 0.40%, TiO
20.56%, MnO 0.05%, Fe
2O
3+ FeO 5.26%, Na
2O 1.10%, K
2O 1.24%.Because attapulgite has the major path of similar zeolite in structure, therefore have good adsorption and decoloration performance, and acrylonitrile is had the good adsorption performance.Preferably, the particle diameter of described attapulgite powder is 74～89 microns.SiO in the absorption property of attapulgite powder and the mineral
2Content relevant, the high more absorption affinity of content is strong more, the performance of the attapulgite powder after acid activation is handled is better.
The acid activation method of attapulgite powder is more, and sulfuric acid process, salt acid system, sulfuric acid-mixed in hydrochloric acid method etc. are arranged.As application number is the acid soak activating process that the patent of invention of CN90105849.1 discloses a kind of attapulgite powder, comprises the about 0.5～100cm of the volume of fritter
3The Concave-convex clay rod raw ore, with concentration is the inorganic acid solution of 1～15wt%, as sulfuric acid, hydrochloric acid solution etc., static immersion 2～100 hours, filter extruding in flakes, activate 30～50 minutes with revolving drier down at 280～350 ℃, the decolorizing ability that is ground into 50～100 microns is 250 ± 5 active attapulgite stone flour.
Copper is a kind of common metallic element.In the present invention, the introducing of copper powder can improve the ability of the adsorbs propylene nitrile of prepared filter medium.Preferably, the use particle diameter is the copper powder below 74 microns.
Gas generation agent is selected at least a in Celogen Az, food-grade carbonic hydroammonium, the oxalic acid.As preferably, gas generation agent is Celogen Az or food-grade carbonic hydroammonium.Wherein, food-grade carbonic hydroammonium also claims AMMONIUM BICARBONATE FOOD GRADE, distinguishes mutually with technical grade carbonic hydroammonium.Though technical grade carbonic hydroammonium also has the effect of sending out the hole, it may contain the impurity of insalubrity, should not be as the raw materials for production of drinking water filter medium.Gas generation agent is that a class is easily decomposed a large amount of gases of generation and caused a material of sending out the hole effect, and wherein azo compound, sodium acid carbonate, carbonic hydroammonium, ammonium carbonate, sulphonyl nitrile compounds, oxalic acid etc. are its typical representatives.
Pressing pressure can be chosen as 0.4～1.0MPa, and sintering temperature is: 220～250 ℃, sintering time is 90～120 minutes, and being cooled to 40～60 ℃ promptly can the demoulding.
Though the present invention has carried out comparatively detailed description for several raw materials used in the step a) among the above-mentioned preparation method, the present invention is not limited to this kind theory or other any theory.Still can not determine for the concrete chemical change between them, the variation of structure in preparation process.The filter medium that these several raw materials are prepared through above-mentioned PROCESS FOR TREATMENT can effectively be removed the acrylonitrile in the water, and synergy is arranged, and the acrylonitrile in the water fully can be absorbed.
In the present invention, for blend step, can think that any low shear mixer or agitator that can significantly not change diameter of particle and size distribution all is suitable for, such as the agitator with blunt impeller blade, drum-type blender, spiral agitator etc., rotating speed will be decided on the type of blender, but is advisable with the dust of avoiding kicking up.
Mixed powder is filled in the pre-designed mould, and with its compacting, pressure generally is not more than 1MPa by pressurization, and adapts with the material of mould therefor; Mould can be by aluminium, cast iron, steel or any suitable material manufacturing that can bear relevant pressure and temperature.Can be in the mould inner surface release agent application, that can select silicone oil or any other for use can be adsorbed onto commercially available releasing agent on the filter medium hardly, also can use processing release papers such as aluminium foil.
The present invention also provides following technical scheme: a kind of filter core that uses above-mentioned filter medium.
The present invention also provides following technical scheme: a kind of purifier comprises above-mentioned filter medium or filter core.
With respect to prior art, the invention has the advantages that the technical scheme that is proposed can remove the acrylonitrile in the water, clearance reaches more than 95～99%, thereby reach the purpose of improving water quality, and method is simple, and the raw material sources of preparation filter medium are extensive, and cost is low.
Technical scheme provided by the present invention is specially adapted to the processing of the water that polluted by acrylonitrile.
The specific embodiment
For further understanding the present invention, above-mentioned technical scheme is further elaborated and illustrates below in conjunction with embodiment.
Embodiment 1
The concrete steps of present embodiment may further comprise the steps:
(1) takes by weighing ultra-high molecular weight polyethylene powder 200g, described ultra-high molecular weight polyethylene is the M-III type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 3,500,000, particle diameter is 89～104 microns, utilizes 140 orders and 170 purpose sieves to screen and promptly can obtain 89～104 microns ultra-high molecular weight polyethylene powder;
(2) take by weighing medicinal active powdered carbon 180g, the particle diameter of described medical activated carbon is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and promptly can obtain 74～89 microns medicinal active powdered carbon;
(3) take by weighing attapulgite powder 150g, the particle diameter of described attapulgite powder is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and promptly can obtain 74～89 microns attapulgite powder;
(4) take by weighing copper powder 20g, the particle diameter of described copper powder is below 74 microns, utilizes 200 purpose sieves to screen the copper powder that promptly can obtain below 74 microns;
(5) take by weighing food-grade carbonic hydroammonium 120g, purity reaches more than 99.99%;
(6) above-mentioned five kinds of powder are put into the mechanical agitator stirring mixed in 10 minutes;
(7) being packed into diameter is in the 50mm tubular die, suppresses under the hydraulic pressure of 0.6MPa, 220 ℃ of sintering temperatures 150 minutes;
(8) naturally cool to 50 ℃ of demouldings then, promptly get the tubulose filter core of many minute apertures.
Embodiment 2
The concrete steps of present embodiment may further comprise the steps:
(1) takes by weighing ultra-high molecular weight polyethylene powder 300g, described ultra-high molecular weight polyethylene is the M-II type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 2,500,000, particle diameter is 89～104 microns, utilizes 140 orders and 170 purpose sieves to screen and promptly can obtain 89～104 microns ultra-high molecular weight polyethylene powder;
(2) take by weighing medicinal active powdered carbon 240g, the particle diameter of described medical activated carbon is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and promptly can obtain 74～89 microns medicinal active powdered carbon;
(3) take by weighing attapulgite powder 200g, the particle diameter of described attapulgite powder is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and promptly can obtain 74～89 microns attapulgite powder;
(4) take by weighing copper powder 5g, the particle diameter of described copper powder is below 74 microns, utilizes 200 purpose sieves to screen the copper powder that promptly can obtain below 74 microns;
(5) take by weighing Celogen Az 100g, purity reaches more than 99.99%;
(6) above-mentioned five kinds of powder are put into the mechanical agitator stirring mixed in 8 minutes;
(7) being packed into diameter is in the 50mm tubular die, suppresses under the hydraulic pressure of 0.75MPa, 250 ℃ of sintering temperatures 120 minutes;
(8) naturally cool to 50 ℃ of demouldings then, promptly get the tubulose filter core of many minute apertures.
Embodiment 3
The concrete steps of present embodiment may further comprise the steps:
(1) takes by weighing ultra-high molecular weight polyethylene powder 280g, described ultra-high molecular weight polyethylene is the M-II type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 2,500,000, particle diameter is 89～104 microns, utilizes 140 orders and 170 purpose sieves to screen and promptly can obtain 89～104 microns ultra-high molecular weight polyethylene powder;
(2) take by weighing medicinal active powdered carbon 120g, the particle diameter of described medical activated carbon is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and promptly can obtain 74～89 microns medicinal active powdered carbon;
(3) take by weighing attapulgite powder 100g, the particle diameter of described attapulgite powder is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and promptly can obtain 74～89 microns attapulgite powder;
(4) take by weighing copper powder 15g, the particle diameter of described copper powder is below 74 microns, utilizes 200 purpose sieves to screen the copper powder that promptly can obtain below 74 microns;
(5) take by weighing oxalic acid 100g, purity reaches more than 99.99%;
(6) above-mentioned five kinds of powder are put into the mechanical agitator stirring mixed in 8 minutes;
(7) being packed into diameter is in the 50mm tubular die, suppresses under the hydraulic pressure of 0.75MPa, 220 ℃ of sintering temperatures 120 minutes;
(8) naturally cool to 50 ℃ of demouldings then, promptly get the tubulose filter core of many minute apertures.
Embodiment 4
The concrete steps of present embodiment may further comprise the steps:
(1) takes by weighing ultra-high molecular weight polyethylene powder 290g, described ultra-high molecular weight polyethylene is the M-II type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 2,500,000, particle diameter is 89～104 microns, utilizes 140 orders and 170 purpose sieves to screen and promptly can obtain 89～104 microns ultra-high molecular weight polyethylene powder;
(2) take by weighing medicinal active powdered carbon 110g, the particle diameter of described medical activated carbon is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and promptly can obtain 74～89 microns medicinal active powdered carbon;
(3) take by weighing attapulgite powder 110g, the particle diameter of described attapulgite powder is 74～89 microns, utilizes 170 orders and 200 purpose sieves to screen and promptly can obtain 74～89 microns attapulgite powder; The acidified processing of described attapulgite powder, the step of acidification be for being the hydrochloric acid solution of 5wt% (mass fraction) with concentration, static immersion 48 hours, and filtration is dried;
(4) take by weighing copper powder 14g, the particle diameter of described copper powder is below 74 microns, utilizes 200 purpose sieves to screen the copper powder that promptly can obtain below 74 microns;
(5) take by weighing oxalic acid 110g, purity reaches more than 99.99%;
(6) above-mentioned five kinds of powder are put into the mechanical agitator stirring mixed in 8 minutes;
(7) being packed into diameter is in the 50mm tubular die, suppresses under the hydraulic pressure of 0.75MPa, 220 ℃ of sintering temperatures 120 minutes;
(8) naturally cool to 50 ℃ of demouldings then, promptly get the tubulose filter core of many minute apertures.
The table of comparisons raw materials used among the embodiment 1～4 is as shown in table 1.
Table 1
Embodiment 5
Get the tubulose filter core 1,2,3 of the many minute apertures of embodiment 1～4 gained, 4, the liner two-layer nonwoven, the outsourcing two-layer nonwoven wraps polypropylene porous net at skin again, bonding the going up in filter core two ends connects end cap, be positioned in stainless steel or the plastic casing, be used for Drinking Water, after testing, this filter core is good, as shown in table 2 to the removal effect of the acrylonitrile in the drinking water.The needs that are fit to very much the home terminal drinking water treatment.
Table 2 uses filter core to handle the water unit of front and back: mg/L (mg/litre)
As can be seen from Table 3, the acrylonitrile that utilizes filter core of the present invention to remove in the water has been obtained good effect.
In addition the water before and after handling has also been carried out the test of sundry item, test result is as shown in table 3.
Table 3 uses filter core to handle the water of front and back
As can be seen from Table 3, utilize filter core of the present invention when removing acrylonitrile, muddy thing and bacterial micro-organism also had a good effect of removing.
With respect to prior art, the invention has the advantages that the technical scheme that is proposed can remove the acrylonitrile in the water, clearance reaches more than 95～99%, thereby reach the purpose of improving water quality, and method is simple, and the raw material sources of preparation filter medium are extensive, and cost is low; In addition, in removing water, in the acrylonitrile, also can remove muddy thing and bacterial micro-organism in the water, especially also higher to the clearance of bacterial micro-organism.
Technical scheme provided by the present invention is specially adapted to the processing of the water that polluted by acrylonitrile.
More than filter medium provided by the present invention and preparation method thereof and the filter core made by this filter medium are described in detail.Used specific embodiment in this specification principle of the present invention and embodiment have been set forth, for one of ordinary skill in the art, according to the thought of the present invention part that may in implementation process, can change in specific embodiments and applications.Therefore, the content of this specification record should not be construed as limitation of the present invention.
Claims (9)
1. a preparation method of filter medium that is used for removing the water acrylonitrile comprises the steps:
A) ultra-high molecular weight polyethylene, active carbon, attapulgite powder, copper powder and gas generation agent are mixed, the weight ratio of described ultra-high molecular weight polyethylene, active carbon, attapulgite powder, copper powder and gas generation agent is: 200～300: 90～240: 100～200: 5～20: 100～120, and described gas generation agent is at least a in Celogen Az, food-grade carbonic hydroammonium and the oxalic acid;
B) mixture of step a) gained is suppressed sintering, cooling in mould.
2. preparation method according to claim 1 is characterized in that, the weight ratio of described ultra-high molecular weight polyethylene, active carbon, attapulgite powder, copper powder and gas generation agent is: 280～290: 110～120: 100～110: 14～15: 100～110.
3. preparation method according to claim 1 and 2 is characterized in that, the particle diameter of described ultra-high molecular weight polyethylene is 89～104 microns.
4. preparation method according to claim 1 and 2 is characterized in that, described active carbon is a medical activated carbon, and its particle diameter is 74～89 microns.
5. preparation method according to claim 1 and 2 is characterized in that, the particle diameter of described attapulgite powder is 74～89 microns.
6. preparation method according to claim 1 and 2 is characterized in that, the particle diameter of described copper powder is below 74 microns.
7. the filter medium that obtains according to each described preparation method in the claim 1～6.
8. use the filter core of the described filter medium of claim 7.
9. a purifier comprises and uses described filter medium of claim 7 or the described filter core of claim 8.
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|---|---|---|---|
| CN2009101386963A CN101898115B (en) | 2009-05-25 | 2009-05-25 | Filter medium, preparation method thereof, filter element and water purification device |
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|---|---|---|---|
| CN2009101386963A CN101898115B (en) | 2009-05-25 | 2009-05-25 | Filter medium, preparation method thereof, filter element and water purification device |
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| CN101898115B true CN101898115B (en) | 2011-09-21 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294150B (en) * | 2011-06-16 | 2013-01-02 | 奇迪电器集团有限公司 | Filtering medium for removing TNT (2,4,6-trinitrotoluene) from drinking water and preparation method thereof |
| CN102389779B (en) * | 2011-09-19 | 2013-04-03 | 周奇迪 | Filter medium for removing sodium dodecylbenzene sulfonate from water, and preparation method, filter element and water purifier thereof |
| CN102397782B (en) * | 2011-11-22 | 2013-07-24 | 奇迪电器集团有限公司 | Filter medium for removing nitrosamine from water and preparation method for filter medium |
| CN103521001B (en) * | 2013-09-06 | 2016-02-24 | 安徽青阳县雄伟泵阀制造有限公司 | A kind of pearlite filter element and preparation method thereof |
| CN103505939B (en) * | 2013-09-06 | 2015-03-04 | 安徽国电能源设备工程有限公司 | Medical stone filter core and preparation method thereof |
| CN103505944B (en) * | 2013-09-06 | 2015-03-04 | 安徽国电能源设备工程有限公司 | Composite ceramic filter core containing diatomite and active carbon and preparation method thereof |
| CN103505940B (en) * | 2013-09-06 | 2015-03-04 | 安徽国电能源设备工程有限公司 | Sepiolite powder filter core and preparation method thereof |
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| CN101125268A (en) * | 2007-06-22 | 2008-02-20 | 奇迪电器集团有限公司 | Filtering medium used for eliminating microencapsulated algae toxin and preparation method thereof and filter element made of the filtering medium |
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| CN101125268A (en) * | 2007-06-22 | 2008-02-20 | 奇迪电器集团有限公司 | Filtering medium used for eliminating microencapsulated algae toxin and preparation method thereof and filter element made of the filtering medium |
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