CN100479901C - Filtering medium used for eliminating iron ions in water and preparation method thereof and filter element made of the filtering medium - Google Patents
Filtering medium used for eliminating iron ions in water and preparation method thereof and filter element made of the filtering medium Download PDFInfo
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Abstract
The present invention relates to a filtering medium preparation method. The method comprises the steps as follows: evenly mix modified zeolete, ultra-high molecular weight polyethylene and the active carbon; sinter the mixture for 60 to 180 minutes under 180 DEG C to 280 DEG C; and then cool the mixture. The weight ratio of the mixture is as follows: active carbon: ultra-high molecular weight polyethylene: modified zeolete is equal to 20 percent to 45 percent: 50 percent to 75 percent: 1 percent to 10 percent. The filtering medium prepared by the above method can be made into filtering element. The filtering medium and the filtering element can be used for eliminating the iron ion in water. The present invention has the advantages of not only purifying the water quality, but also no secondary pollution and high efficiency of eliminating iron ion. By measurement, the iron ion eliminating efficiency of drinking water with the filtering element ranges from 80 percent to 95 percent.
Description
Technical field
The present invention relates to a kind of filter medium and preparation method thereof, also relate to the filter core that constitutes by this filter medium, also relate to a kind of method that adopts filter medium of the present invention or filter core to remove iron ion in the water.
Background technology
Ferro element is the essential trace element of human body life, and the human body iron deficiency can cause anaemia, physically-draining even bring out various diseases etc.But because present industrial wastewater discharge and environmental pollution, iron-holder is excessive even exceed standard in a lot of local water sources.Though iron is less to the toxicity of humans and animals, when the concentration of iron compound is 0.1～0.3 mg/litre in the water body, will influence water look, smell, organoleptic indicator such as flavor.Iron ion content is too high, if drink for a long time, will produce harm to health.Iron content is too high in the water for industrial use, all will produce harmful effect to the production of departments such as weaving, printing and dyeing, papermaking, food, also corrodes the aqueduct facility easily.Now, the iron content in a lot of regional water of China all exceeds standard, and need carry out deironing and handle.
Publication number be CN1911829A public announcement of a patent application a kind of method with the contact oxidation method deironing, include outside the technical process of neutralization, precipitation, also have the process that the waste water that contains ferrous ion that post precipitation is discharged continues processing; Circulation contact oxidation is that the waste water of discharging behind the neutralization precipitation is fed the circulation contact oxidation device, makes the ferrous ion that is dissolved in the waste water become water-fast ferric ion with oxygen reaction with water behind contact oxidation; Through secondary precipitation, the ferric iron in the waste water is precipitated fully again, discharge the clear water reuse.This method is only applicable to Treatment of Industrial Water, stops up filtrate easily, and filtrate needs frequent backwash, and generally only is applicable to the former water that iron content is lower, and the water quality of water outlet is also unstable.
Summary of the invention
The filter core that the technical problem to be solved in the present invention is to provide a kind of easy to use, filter medium that filter efficiency is high and preparation method thereof and is made by this filter medium.The present invention also provides a kind of method that adopts above-mentioned filter medium or filter core to remove iron ion in the water.
In order to solve the problems of the technologies described above, the present invention by the following technical solutions:
A kind of preparation method of filter medium comprises
A) be that 150～840 microns clinoptilolite powder carries out acidleach with the hydrochloric acid of 1～10wt% with particle diameter;
B) with the alkali neutralization, washing was boiled 0.5～3 hour with boiling water again;
C) oven dry of the zeolite powder that step b) obtained 350～500 ℃ of roasting temperatures 1～5 hour, cooling, is pulverized, and obtains modified zeolite powder;
D) modified zeolite powder that step c) is obtained mixes with ultra-high molecular weight polyethylene and active carbon, and the weight ratio of mixing is active carbon: ultra-high molecular weight polyethylene: modified zeolite powder=20～45%:50～75%:1～10%;
E) mixture of step d) gained is suppressed in mould, at 180～280 ℃ of sintering temperatures, cooling.
As preferably, leaching time is for flooding 0.5～2 hour under the state that stirs in the step a).In step b), can select for use NaOH or sodium acid carbonate or sodium carbonate to carry out neutralisation treatment.
As preferably, the stoving process parameter of step c) mesolite powder is, under 60～150 ℃ of temperature dry 0.5～6 hour.
Natural zeolite is the general name of moisture porous silicate, its crystalline texture mainly is to be made of silicon-oxy tetrahedron, wherein part tetravalence silicon ion is replaced by trivalent aluminium ion, cause the negative electrical charge surplus, the ion that therefore alkali metal or alkaline-earth metal isoequilibrium electric charge are arranged in the structure, the vestibule and the duct of certain pore size are arranged in the zeolite framework simultaneously, determined it to have character such as absorption, ion-exchange.
Zeolite type is a lot, is divided into natural zeolite and artificial synthetic zeolite, and natural zeolite can be divided into clinoptilolite, modenite, heulandite, phillipsite, erionite, chabasie etc. again, and the artificial synthetic zeolite mainly contains 4A zeolite, y-type zeolite, X type zeolite.In the present invention, zeolite is preferably using natural clinoptilolite; The particle size range of modified zeolite powder is outstanding good with 44～124 microns.
Zeolite is after the hydrochloric acid modification is handled, can remove impurity contained in the mineral and DDGS, in mineral structure, etch abundant hole and vestibule, increase its contact area, thereby character such as the absorption of raising zeolite, ion-exchange, especially the clinoptilolite of handling through method provided by the present invention has demonstrated its strong selection suction-operated to iron ion.
Active carbon has very strong suction-operated to iron ion, selects for use medical activated carbon can guarantee that filter medium is directly used in the processing of drinking water.As preferably, it is 44～178 microns medical activated carbon that active carbon is selected particle diameter for use.
The adsorption capacity of modified zeolite powder and active carbon also has much relations with its particle diameter; particle diameter is excessive, the specific area of particle is reduced, and particle diameter is too small meticulous; can influence the sintering effect of filter medium and absorption, filter effect, fine particle is understood block pores and duct.Practice shows that also the particle size distribution range of modified zeolite powder is unsuitable wide, and the difference between particle grain size continuous distributed and the particle diameter is not more than under 50% the situation, can obtain better effect; Also there is same rule in active carbon.
The polyethylene of General Definition 1,500,000～7,000,000 is a ultra-high molecular weight polyethylene, preferred 250～4,000,000 the ultra-high molecular weight polyethylene of the present invention.Compare with low molecular weight polyethylene, a notable feature is that ultra-high molecular weight polyethylene has powerful electrostatic adsorption, trickle, superfine particle that adsorbable microfiltration can not block.
In the present invention, ultra-high molecular weight polyethylene also plays the effect of bonding and formation filter medium skeleton.
As preferably, the particle diameter of ultra-high molecular weight polyethylene is 74～350 microns.
The present invention also provides following technical scheme: prepare filter medium with above-mentioned method, this filter medium can constitute filter core; Filter medium and filter core can be used for removing iron ion in the water.
With respect to prior art, the invention has the advantages that the filter medium of preparation and filter core except can purifying water, also realize non-secondary pollution, be used to remove iron ion expeditiously.Show that through chemical analysis the removal efficient that adopts the iron ion of drinking water behind the filter core of the present invention is 80～95%.
The specific embodiment
For further understanding technical characterictic of the present invention and content, the preparation of filter core is elaborated below in conjunction with embodiment.
For clearer description the present invention, in specific embodiment, adopted the unit of order number (Mesh).It is generally acknowledged that order is meant the number in every square of hole on the inch screen cloth, except the eyelet of expression screen cloth, it is used to represent to pass through the particle diameter of the particle of screen cloth simultaneously, and the order number is high more, and particle diameter is more little.The present invention is with reference to the following order number and the data table of comparisons (table 1) of granularity.
Table 1 particle diameter unit: μ m (micron)
| The order number | Particle diameter μ m | The order number | Particle diameter μ m | The order number | Particle diameter μ m | The order number | Particle diameter μ m |
| 25 | 710 | 50 | 297 | 140 | 104 | 325 | 44 |
| 30 | 590 | 60 | 250 | 170 | 89 | 400 | 38 |
| 35 | 500 | 80 | 178 | 200 | 74 | 460 | 30 |
| 40 | 420 | 100 | 150 | 230 | 61 | 540 | 26 |
| 45 | 350 | 120 | 124 | 270 | 53 | 650 | 21 |
Embodiment 1
The treatment process of zeolite
The hydrochloric acid of getting granularity and be clinoptilolite powder 50 grams and 1wt% between 140～200 orders adds in the glassed agitator for 450 milliliters, stirred 3 hours, neutralize with caustic alkali, filter out, boiling water boiled 0.5 hour again, spent deionised water 2 times, under 120 ℃ of temperature dry 1 hour then, under 450 ℃ of temperature, heated 2 hours again, be cooled to room temperature.
Embodiment 2
The treatment process of zeolite
Get granularity and be in the 400 milliliters of adding mechanical agitators of hydrochloric acid of clinoptilolite powder 50 grams and 5wt% between 230～325 orders, stirred 1.5 hours, neutralize with caustic alkali, filter out, boiling water boiled 0.5 hour again, spent deionised water 2 times, under 120 ℃ of temperature dry 3 hours then, under 450 ℃ of temperature, heated 2 hours again, be cooled to room temperature.
Embodiment 3
The treatment process of zeolite
The hydrochloric acid of getting granularity and be clinoptilolite powder 50 grams and 3wt% between 230～325 orders adds in the glassed agitator for 450 milliliters, stirred 100 minutes, neutralize with caustic alkali, filter out, boiling water boiled 3 hours again, spent deionised water 2 times, under 110 ℃ of temperature dry 4 hours then, under 420 ℃ of temperature, heated 3 hours again, be cooled to room temperature.
Embodiment 4
The treatment process of zeolite
Get granularity and be in the 250 milliliters of adding mechanical agitators of hydrochloric acid of clinoptilolite powder 50 grams and 10wt% between 230～325 orders, stirred 60 minutes, neutralize with caustic alkali, filter out, boiling water boiled 1 hour again, spent deionised water 2 times, under 85 ℃ of temperature dry 6 hours then, under 350 ℃ of temperature, heated 4 hours again, be cooled to room temperature.
Embodiment 5
Preparation is used for removing the filter core of the iron ion of water
Between zeolite powder 20 gram that takes by weighing embodiment 1 gained and 100～140 orders, molecular weight is that 3,500,000 ultra-high molecular weight polyethylene 180 grams and active carbon 100 grams between 140～170 orders were put into the mechanical agitator stirring after 90 minutes, getting partially mixed thing packs in the tubular die, compression moulding, at 245 ℃ of sintering temperatures after 90 minutes, be cooled to 40 ℃ of demouldings, can become the tubulose filter core of many minute apertures.
Embodiment 6
Preparation is used for removing the filter core of the iron ion of water
Between zeolite powder 15 gram that takes by weighing embodiment 2 gained and 100～140 orders, molecular weight is that 3,500,000 ultra-high molecular weight polyethylene 180 grams and active carbon 140 grams between 140～170 orders were put into the mechanical agitator stirring of adjustable speed after 80 minutes, getting partially mixed thing packs in the tubular die, compression moulding, at 240 ℃ of sintering temperatures after 150 minutes, be cooled to 40 ℃ of demouldings, can become the tubulose filter core of many minute apertures.
Embodiment 7
Preparation is used for removing the filter core of the iron ion of water
Between zeolite powder 15 gram that takes by weighing embodiment 3 gained and 100～140 orders, molecular weight is that 3,500,000 ultra-high molecular weight polyethylene 225 grams and active carbon 60 grams between 140～170 orders were put into the mechanical agitator stirring of adjustable speed after 60 minutes, getting partially mixed thing packs in the tubular die, compression moulding, at 240 ℃ of sintering temperatures after 180 minutes, be cooled to 40 ℃ of demouldings, can become the tubulose filter core of many minute apertures.
Embodiment 8
Preparation is used for removing the filter core of the iron ion of water
Between zeolite powder 15 gram that takes by weighing embodiment 4 gained and 100～140 orders, molecular weight is that 3,500,000 ultra-high molecular weight polyethylene 165 grams and active carbon 120 grams between 140～170 orders were put into the mechanical agitator stirring of adjustable speed after 60 minutes, getting partially mixed thing packs in the tubular die, compression moulding, at 235 ℃ of sintering temperatures after 120 minutes, be cooled to 40 ℃ of demouldings, can become the tubulose filter core of many minute apertures.
Use embodiment 5～8 resulting filter cores that the water that contains iron ion has been carried out purified treatment, and the iron ion that is wherein contained carried out quantitative analysis, the result shows, 4 kinds of filter cores are respectively 93%, 85%, 95% and 90% to the filter efficiency of iron ion, have obtained good filter effect.
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.In sum, this description should not be construed as limitation of the present invention.
Claims (9)
1, a kind of preparation method of filter medium comprises
A) be that 150～840 microns clinoptilolite powder carries out acidleach with the hydrochloric acid of 1～10wt% with particle diameter;
B) with the alkali neutralization, washing was boiled 0.5～3 hour with boiling water again;
C) oven dry of the zeolite powder that step b) obtained 350～500 ℃ of roasting temperatures 1～5 hour, cooling, is pulverized, and obtains modified zeolite powder;
D) modified zeolite powder that step c) is obtained mixes with ultra-high molecular weight polyethylene and active carbon, and the weight ratio of mixing is active carbon: ultra-high molecular weight polyethylene: modified zeolite powder=20～45%:50～75%:1～10%;
E) mixture of step d) gained is suppressed in mould, at 180～280 ℃ of sintering temperatures, cooling.
2, preparation method as claimed in claim 1, wherein leaching time is to flood 0.5～2 hour under the state that stirs in the step a).
3, preparation method as claimed in claim 1, wherein the stoving process parameter of step c) mesolite powder is, drying is 0.5～6 hour under 60～150 ℃ of temperature.
4, preparation method as claimed in claim 1, wherein the molecular weight of ultra-high molecular weight polyethylene is 250～4,000,000.
5, preparation method as claimed in claim 4, wherein the particle diameter of ultra-high molecular weight polyethylene is 74～350 microns.
6, preparation method as claimed in claim 1, wherein active carbon is that particle diameter is 44～178 microns a medical activated carbon.
7, the filter medium that obtains of preparation method as claimed in claim 1.
8, the filter core that constitutes by the described filter medium of claim 7.
9, a kind of method of removing iron ion in the water comprises and uses described filter medium of claim 7 or the described filter core of claim 8.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007883A (en) * | 2012-12-13 | 2013-04-03 | 武汉钢铁(集团)公司 | Iron and steel industrial wastewater iron remover and preparation method thereof |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101310854B (en) * | 2008-02-22 | 2010-06-02 | 周奇迪 | Filter media and preparation method, filter element, purifier and drinking machine using the filter media |
| CN101474514B (en) * | 2008-12-31 | 2011-04-06 | 山西大学 | Method for preparing modified ultra-high molecular mass polyethylene micropore filter element |
| CN101905103A (en) * | 2010-09-11 | 2010-12-08 | 太原海力丰科技发展有限公司 | Method for manufacturing composite millipore filter element for efficiently removing arsenic and fluoride in drinking water |
| CN102059022B (en) * | 2010-11-23 | 2012-10-03 | 苏州市维欧泰克精密制造有限公司 | Filter medium for removing sodium in drinking water |
| CN102501366B (en) * | 2011-10-28 | 2014-10-22 | 上海百菲特环保科技有限公司 | Preparation method of hollow filtering member and product thereof |
| CN103143204B (en) * | 2013-03-27 | 2015-03-25 | 李彤 | Method for preparing active carbon composite filter core |
| CN105854791A (en) * | 2016-04-11 | 2016-08-17 | 锦州维康净水材料有限责任公司 | Production method and regeneration method of iron, manganese and ammonia nitrogen removal water purifying filter material for drinking water |
| CN107175071A (en) * | 2017-05-05 | 2017-09-19 | 浙江艾波特环保科技股份有限公司 | A kind of sintering activity charcoal forming filter core |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007883A (en) * | 2012-12-13 | 2013-04-03 | 武汉钢铁(集团)公司 | Iron and steel industrial wastewater iron remover and preparation method thereof |
| CN103007883B (en) * | 2012-12-13 | 2014-12-24 | 武汉钢铁(集团)公司 | Iron and steel industrial wastewater iron remover and preparation method thereof |
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