CN101905103A - Method for manufacturing composite millipore filter element for efficiently removing arsenic and fluoride in drinking water - Google Patents
Method for manufacturing composite millipore filter element for efficiently removing arsenic and fluoride in drinking water Download PDFInfo
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- CN101905103A CN101905103A CN 201010278369 CN201010278369A CN101905103A CN 101905103 A CN101905103 A CN 101905103A CN 201010278369 CN201010278369 CN 201010278369 CN 201010278369 A CN201010278369 A CN 201010278369A CN 101905103 A CN101905103 A CN 101905103A
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Abstract
The invention relates to a method for manufacturing a shaped filter medium for removing harmful elements in water, in particular to a method for manufacturing a composite millipore filter element for efficiently removing arsenic and fluoride in drinking water. The problem of purifying drinking water in high arsenic and fluoride districts in China is solved. The composite millipore filter element for efficiently removing arsenic and fluoride in drinking water is manufactured by using modified zeolite powder, copper zinc alloy powder and ultrahigh molecular weight polyethylene as raw materials. The manufacturing method comprises the following steps of: mixing the polyethylene, the modified zeolite and the copper zinc alloy powder according to a certain mass ratio; molding, sintering at 170-250 DEG C for 1-3 hours, and heating in a stepped mode. When used for purifying drinking water in high arsenic and fluoride districts, the composite millipore filter element has the advantages of high efficiency, convenient operation and low operational cost. The defects of easy loss and inconvenient management of a bulk filter material and large size and large occupied area of used equipment are overcome.
Description
Technical field
The present invention relates to the preparation method of the forming filter medium of harmful element in a kind of the dewatering, be specially a kind of preparation method of composite millipore filter element for efficiently removing arsenic and fluoride in drinking water.
Background technology
Arsenic is a kind of plasm poisonous substance, has biological effect widely.U.S. disease prevention and control center and international cancer research institution (IARC) have been defined as it first carcinogen.At present, the whole nation has millions of saliva # to contain arsenic, and 8,500 ten thousand people's long-term drinking are arranged over nearly 20 years approximately.
Find out that at present region drinking water type arsenic poisoning lesion relates to 8 provinces and regions, the whole nation, 38 counties, 62 townshiies, 454 villages cover population more than 330,000; Region drinking water type fluorine poisoning lesion, the whole nation covers 28 provinces, 1181 counties, 5636 townshiies, 107563 villages, about 9,200 ten thousand people.
The lesion resident is because of the high arsenic fluorine of long-term drinking water, and skin, tooth, bone are endangered to some extent, and it is healthy seriously to have influenced the resident.For many years government drops into great amount of manpower, financial resources in order to solve the high arsenic fluorine lesion person poultry safety problem of drinking water, and has obtained huge achievement.But high arsenic fluorine lesion drinking-water purifies in each side such as technology and still needs research and inquirement, and the research and development of particularly new effectively removing arsenic fluorine material are still at present the important topic of research and development both at home and abroad.
The drinking-water de-arsenic fluorine-reducing is studied report both at home and abroad and is mainly concentrated on three aspects, and one, coagulant sedimentation, report that maximum coagulant has molysite, as ferric trichloride, ferrous sulfate and iron chloride; Aluminium salt, as aluminum sulfate, aluminium chloride, polymeric aluminum; Also has silicate, carbonate or the like.Numerous studies show that, molysite removing arsenic and fluoride effect is better than aluminium salt, and after molysite flocculation again through sand filtration, better effects if.Two, absorption method is studied the hydroxide such as the basic carbonate yttrium of maximum adsorbents such as bone black, activated alumina, modified zeolite and various silicate mineral and rare earth element.This arsenic removal has high-performance, and the advantage of low price can be selected suitable arsenic removal material, will be after the main direction of civilian development.Three, artificial synthetic chelating resin exchange process, Linbinka etc. have carried out drinking-water arsenic removal test with mobile ion exchange arsenic removing apparatus, find ion exchange process to drinking-water arsenic removal nearly unavailable, the cationic ion-exchange resin that has activated with Cu then demonstrates preferable effect of removing arsenic.In the static test to the adsorption capacity of pentavalent arsenic up to 7.79mg/L, be 4.37mg/L to arsenious adsorption capacity, but the shown arsenic removal capacity of dynamic test has reduced by 16 times.Though more than various flocculants, adsorbent and artificial synthetic chelating resin research a lot, when being used for the scene, the problem that all exists efficient to reduce, moreover technical sophistication requires too highly, costs an arm and a leg, and easily causes secondary pollution, resident to be reluctant to accept.Thereby most of achievements in research are rested on the laboratory.
Because various flocculants, adsorbent and artificial synthetic chelating resin de-arsenic fluorine-reducing mechanism, efficient, application conditions, usage range have nothing in common with each other, thereby its single research are difficult to reach the purpose of practical application.In recent years, some scholars utilize the synergy of multiple adsorbent with carrying out arsenic removal or fall fluorine in its same post of packing into, have improved adsorption efficiency greatly.As people such as ride the waves makes skeleton with Powdered Activated Carbon and different places of production bone black, the reinforcement water purification agent that is processed into after the modification, and arsenic removal capacity and efficient have improved 50 times than raw material, and is higher 10 times than the commercially available material, and have high selectivity.Application number: 200410010501.4 are made by concavo-convex excellent mineral powder and active carbon and aluminium oxide for disclosed defluorination, arsenic removal water quality cleansing agent and preparation method thereof, in this technical scheme, following method is provided, and concavo-convex rod is made pulvis and is used with calcination activation or soda acid activation.Also have the inorganic polymer coagulant of people's developments such as Japanese plum formal plan to unite iron (GC), kept the adsorption capacity of ferric trichloride, cost has but reduced by 40%; " Zhejiang preventive medicine " 2002-14-7 " Removal of Arsenic in Drinking Water apparatus effect observation ", disclosing the catalyst 100kg that utilizes purity (99.99%) ormolu particulate (KDF55) to be oxidized to pentavalent arsenic as trivalent arsenic packs in the filter post with other adsorbents, no longer need other filtrates and equipment, but repetitive cycling is used, must not regenerate, alloying pellet can make trivalent arsenic be converted into pentavalent arsenic, and service life is very long.Also have more people to study and carry out the science modification, improved the capacity of arsenic-adsorbing fluorine greatly, and be easy to regeneration with different inorganic salts such as molysite or aluminium salt pair zeolite or other silicate.
Summary of the invention
It is the preparation method of a kind of composite millipore filter element for efficiently removing arsenic and fluoride in drinking water of primary raw material with modified natural zeolite powder and high-purity copper Zinc alloy powder, ultra-high molecular weight polyethylene that the present invention provides a kind of for the problem that solves China's high arsenic fluorine area purifying of drinking water.
The present invention is realized by following technical scheme, a kind of preparation method of composite millipore filter element for efficiently removing arsenic and fluoride in drinking water, with modified zeolite powder, cu-zn alloy powder, ultra-high molecular weight polyethylene powder is raw material, makes composite millipore filter element for efficiently removing arsenic and fluoride in drinking water, manufacture craft: with polyethylene, modified zeolite, cu-zn alloy powder, mix according to the certain mass ratio, the dress mould, sintering, sintering temperature: 170-250 ℃, sintering time: 1-3 hours, heating mode: ladder-elevating temperature.
Selecting molecular weight is that ultra-high molecular weight polyethylene, zeolite powder, the cu-zn alloy powder of 200-400 ten thousand crossed the 100-200 mesh standard sieve and mixed according to the mass ratio of 40-70:20-50:5-15, the dress mould, under 170-250 ℃ of temperature, sintering was made the removing arsenic and fluoride composite millipore filter element in 1-3 hours, and its copper of the cu-zn alloy powder that is adopted/zinc mass ratio is 40-85:60-15.
The method of modifying of natural zeolite:
1. activating zeolite is handled: gather clinoptilolite, pulverize, granularity is the 100-200 order, washes the solubility inorganic impurity of zeolite surface, puts into Muffle furnace again, 350-550 ℃ of roastings 2-3 hours, so that remove wherein organic matter.Be cooled to room temperature, sealing is preserved standby.
2. Zeolite modifying is handled: the zeolite powder that (1) is good with activation processing is soaked in the 0.05-0.5mol/L hydrochloric acid solution, stirs 1-2 hour under the room temperature, take out, with deionized water rinsing until test with the PH test paper be neutrality till.(2) zeolite powder that step (1) is handled well is soaked in the 0.05-0.5mol/L sodium hydroxide solution, stirs under the room temperature 1-2 hour, take out, with deionized water rinsing until test with the PH test paper be neutrality till.(3) zeolite powder that step (2) is handled well is soaked in the saturated aqueous common salt, heats 1-3 hours under 70-75 ℃ of conditions, and stirs frequently, makes it be converted into NaM type zeolite.Take out, with deionized water rinsing at least 5 times, in 115 ℃ of oven dry.(4) again NaM type zeolite is soaked in the liquor ferri trichloridi of 0.05-0.5mol/L, is adjusted to PH5-8; And under 40-75 ℃ of conditions, heat, stirred 1-3 hours, carry out modification and handle.Take out, with deionized water rinsing at least 5 times,, seal standby again in 110-120 ℃ of oven dry.
The filtering material of making according to the method described in the present invention, microporous filter tube for example, its main performance detects as follows: outward appearance: bright and clean, flawless, do not have any flaw, no any foreign matter and impurity; Aperture: 10-20 micron; Pure water flux:〉3000L/ m
2H0.05Mpa; Operating pressure: ∠ 0.10Mpa; 90 ℃ of operating temperature: ∠; Arsenic clearance: more than 98%; Fluorine clearance: more than 98%; Regenerated capacity recovery rate: more than 85%; The purification filtering of arsenic fluorine and heavy metal ion etc. in can being applied to drink water.
Compared with prior art, the present invention has following characteristics: 1, with behind the Zeolite modifying, increased adsorptive selectivity and adsorption capacity to the arsenic fluorine; 2, by the composite millipore filter element of high-purity copper Zinc alloy powder and modified zeolite mixing manufacture, the arsenic removal that is used to drink water need not added any oxidant can realize arsenious in-situ oxidation, improved the removal efficient of arsenic greatly by the synergy of high-purity copper kirsite and modified zeolite, and can use by repeated regeneration; 3, be the composite millipore filter element that raw material is made with high-purity copper Zinc alloy powder, modified zeolite powder, ultra-high molecular weight polyethylene, be used for high arsenic fluorine area purifying of drinking water, the efficient height, easy to use, operating cost is low, has overcome diffusing type filtrate and has run off easily, the inconvenience management, device therefor is huge, numerous shortcomings that floor space is big.
The specific embodiment
Embodiment 1: a kind of preparation method of composite millipore filter element for efficiently removing arsenic and fluoride in drinking water, selecting molecular weight is that 2,000,000 ultra-high molecular weight polyethylene, modified zeolite, 99.9% high-purity copper kirsite are according to mass ratio: 60:30:10 mixes.
Manufacture craft: ultra-high molecular weight polyethylene, modified zeolite, high-purity copper kirsite are crossed 200 mesh sieves, and according to the mass ratio batching, the dress mould under 170-250 ℃ of temperature, adopts the staged heating mode.Sintering time: 1-3 hours making filter cores.The ladder-elevating temperature mode is for to be warmed to 130-155 ℃ with the sintering furnace temperature, and the membrane material that will have stainless steel mould is put into sintering furnace, is incubated 1-2 hours, and then furnace temperature is heated to 170-250 ℃, is incubated 1-2 hours again.
Performance test: aperture: 10 microns; Pure water flux:〉3000L/ m
2H0.05Mpa; Operating pressure: ∠ 0.10Mpa; Arsenic clearance: more than 98%; Fluorine clearance: more than 98%; Regenerated capacity recovery rate: more than 85%.
Embodiment 2: the preparation method of composite millipore filter element for efficiently removing arsenic and fluoride in drinking water, and selecting molecular weight is that 3,000,000 ultra-high molecular weight polyethylene, modified zeolite, 99.9% high-purity copper kirsite are according to mass ratio: 70:25:5 mixes,
Manufacture craft: ultra-high molecular weight polyethylene, modified zeolite, high-purity copper kirsite are crossed 150 mesh sieves, according to the mass ratio batching, and dress mould, sinter molding.
Performance test: aperture: 15 microns; Pure water flux:〉3000L/ m
2H0.05Mpa; Operating pressure: ∠ 0.10Mpa.Arsenic clearance: more than 98%; Fluorine clearance: more than 98%; Regenerated capacity recovery rate: more than 85%.
Embodiment 3, the preparation method of composite millipore filter element for efficiently removing arsenic and fluoride in drinking water, and the selection molecular weight is 4,000,000 ultra-high molecular weight polyethylene, modified zeolite: 99.9% high-purity copper kirsite according to mass ratio is: 40:50:15 mixes,
Manufacture craft: ultra-high molecular weight polyethylene, modified zeolite, high-purity copper kirsite are crossed 100 mesh sieves, according to the mass ratio batching, and dress mould, staged intensification sinter molding.
Performance test: aperture: 20 microns; Pure water flux:〉3000L/ m
2H0.05Mpa; Operating pressure: ∠ 0.10Mpa.Arsenic clearance: more than 98%; Fluorine clearance: more than 98%; Regenerated capacity recovery rate: more than 85%.
Claims (3)
1. the preparation method of a composite millipore filter element for efficiently removing arsenic and fluoride in drinking water, it is characterized in that: with modified zeolite powder, cu-zn alloy powder, ultra-high molecular weight polyethylene powder is raw material, make composite millipore filter element for efficiently removing arsenic and fluoride in drinking water, manufacture craft:, mix the dress mould with polyethylene, modified zeolite, cu-zn alloy powder according to the certain mass ratio, sintering, sintering temperature: 170-250 ℃, sintering time: 1-3 hours, heating mode: ladder-elevating temperature.
2. the preparation method of composite millipore filter element for efficiently removing arsenic and fluoride in drinking water according to claim 1 is characterized in that the preparation method of modified zeolite is: using natural clinoptilolite is pulverized, crossed the 100-200 mesh sieve, activation in 350-550 ℃ of roasting 2-3 hour; Again through 0.05-0.5mol/L salt acid soak, stirring 1-2 hour, again through 0.05-0.5mol/L soaking with sodium hydroxide, stirring 1-2 hour, soak, stirred 1-3 hour through saturated sodium-chloride again, be soaked in then in 0.05-0.5mol/L liquor ferri trichloridi, heat 40-75 ℃, stirred 1-3 hours, and carried out modification and handle.
3. the preparation method of composite millipore filter element for efficiently removing arsenic and fluoride in drinking water according to claim 1 is characterized in that: selecting molecular weight is the ultra-high molecular weight polyethylene powder of 200-400 ten thousand: modified zeolite: cu-zn alloy powder mixing quality ratio is: 40-70:20-50:5-15; Its copper of the cu-zn alloy powder that is adopted/zinc mass ratio is 40-85:60-15.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151440A (en) * | 2011-03-28 | 2011-08-17 | 信阳师范学院 | Composite filter pipe manufactured by expanded perlite and zeolite as main raw materials and manufacture method of composite filter pipe |
| CN102350129A (en) * | 2011-06-21 | 2012-02-15 | 黄光智 | Integrated water purifying filter core for removing fluorine and filtering |
| CN103349868A (en) * | 2013-07-13 | 2013-10-16 | 台州森泉水处理科技有限公司 | Nano-metal compound filter material and production technology thereof |
| WO2016086487A1 (en) * | 2014-12-02 | 2016-06-09 | 陆向东 | Air purification material and preparation method therefor |
| CN106946337A (en) * | 2017-05-23 | 2017-07-14 | 核工业理化工程研究院华核新技术开发公司 | The chlorine residue filtering filtrate of depth dechlorination |
| CN107652822A (en) * | 2017-10-11 | 2018-02-02 | 广东华兹卜新材料科技有限公司 | A kind of aqueous colorful art coatings and preparation method thereof |
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| US5152464A (en) * | 1991-06-12 | 1992-10-06 | Farley Frederick A | Shower filter assembly |
| US5300224A (en) * | 1991-11-21 | 1994-04-05 | Farley Frederick A | Fluid treatment device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151440A (en) * | 2011-03-28 | 2011-08-17 | 信阳师范学院 | Composite filter pipe manufactured by expanded perlite and zeolite as main raw materials and manufacture method of composite filter pipe |
| CN102350129A (en) * | 2011-06-21 | 2012-02-15 | 黄光智 | Integrated water purifying filter core for removing fluorine and filtering |
| CN103349868A (en) * | 2013-07-13 | 2013-10-16 | 台州森泉水处理科技有限公司 | Nano-metal compound filter material and production technology thereof |
| WO2016086487A1 (en) * | 2014-12-02 | 2016-06-09 | 陆向东 | Air purification material and preparation method therefor |
| CN106946337A (en) * | 2017-05-23 | 2017-07-14 | 核工业理化工程研究院华核新技术开发公司 | The chlorine residue filtering filtrate of depth dechlorination |
| CN107652822A (en) * | 2017-10-11 | 2018-02-02 | 广东华兹卜新材料科技有限公司 | A kind of aqueous colorful art coatings and preparation method thereof |
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Application publication date: 20101208 |