CN102266691A - Filtering medium for removing ammonia nitrogen from drinking water and preparation method thereof - Google Patents
Filtering medium for removing ammonia nitrogen from drinking water and preparation method thereof Download PDFInfo
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- CN102266691A CN102266691A CN2011101625694A CN201110162569A CN102266691A CN 102266691 A CN102266691 A CN 102266691A CN 2011101625694 A CN2011101625694 A CN 2011101625694A CN 201110162569 A CN201110162569 A CN 201110162569A CN 102266691 A CN102266691 A CN 102266691A
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Abstract
The invention discloses a filtering medium for removing ammonia nitrogen from drinking water and a preparation method thereof, and further relates to a filtering core consisting of the filtering medium, a water purifying device and a water dispenser. The method for preparing the filtering medium comprises the following steps of: a) mixing raw material containing ultrahigh molecular weight polyethylene, zeolite molecular sieve powder, active carbon powder, active atlapulgite powder and pore-forming agent in a weight ratio of 200-400: 80-300: 80-200: 80-250: 50-150; and b) pressing the mixture obtained in the step a) in a die, and sintering and cooling the mixture. The filtering medium provided by the invention has high removal rate for the ammonia nitrogen in water, is fast in removing speed, simple in use and low in cost without subsequent treatment; and the filtering medium can avoid the harm to human body. The filtering medium is suitable for treating drinking water at a home terminal; and the removing ratio of ammonia nitrogen in water is higher than 98%.
Description
Technical field
The present invention relates to a kind of filter medium of removing ammonia nitrogen in the drinking water and preparation method thereof, the filter core, the water purifying plant and drinking Fountains that constitute by this filter medium.
Background technology
Ammonia nitrogen is meant in the water with free ammonia (NH
3) and ammonium ion (NH
4 +) nitrogen that exists of form.Industrial wastewaters such as people life and industrial and agricultural production such as chemical industry, metallurgy, paint pigment, coal gas, coking, tanning, chemical fertilizer can cause and contain ammonia-nitrogen sewage in a large number and enter water body, cause in the water of source, waterworks ammonia-nitrogen content increasing.Ammonia nitrogen can react with organohalogen compounds in the water etc., reduces bactericidal effect; The water factory's advanced treating running water that has, ammonia can be in the active carbon filter bed generate the nitrite with carcinogenesis through the nitrification and denitrification effect under the effect of microbial film; Also can cause the biological stability that produces a large amount of chlorine disinfection by-products and influence water factory's water outlet, the bacterial micro-organism breeding is grown, drinking-water has peculiar smell; Cause the body eutrophication phenomenon to produce, aquatile particularly algae will breed in a large number, destroy the ecological balance of water body, make water quality deterioration, toxic to fish and some aquatile, not only polluted China's freshwater resources in short supply, also influenced fisheries development, directly the health of harm humans.
It is undesirable that water factory's conventional water treatment process is removed the ammonia nitrogen effect; The blow-off method system complex, the cost height; Ammonia nitrogen in high density has inhibitory action to microorganism, and biological nitration and denitrification are handled high-concentration ammonia nitrogenous wastewater limitation; Hyperfiltration need expend a large amount of electricity and water, cost height, equipment complexity; The ion exchange resin exchange capacity is low, and selective adsorption capacity is poor.
Summary of the invention
The technical problem that the present invention solves provides a kind of filter medium and preparation method thereof, and this filter medium is to the ammonia-N removal rate height in the drinking water, and speed is fast, and the filter core, purifier and the water dispenser that are made of this filter medium also are provided.
For addressing the above problem, the present invention by the following technical solutions:
A kind of preparation method of filter medium that is used for removing the drinking water ammonia nitrogen comprises the steps:
A) raw material that will comprise ultra-high molecular weight polyethylene powder, zeolite molecular sieve powder, activated carbon powder, atlapulgite powder and gas generation agent mixes, and the weight ratio of described ultra-high molecular weight polyethylene powder, zeolite molecular sieve powder, activated carbon powder, atlapulgite powder and gas generation agent is: 200～400: 80～300: 80～200: 80～250: 50～150;
B) mixture of step a) gained is suppressed sintering, cooling in mould.
As preferably, the weight ratio of described ultra-high molecular weight polyethylene powder, zeolite molecular sieve powder, activated carbon powder, atlapulgite powder and gas generation agent is: 250～300: 100～260: 100～180: 100～200: 80～120.
Pressing pressure is 0.4MPa～1.0MPa, and sintering temperature is 200 ℃～300 ℃, and sintering time is 120 minutes～150 minutes, is cooled to 40 ℃～60 ℃ demouldings behind the sintering.In this manufacturing process, after inventor's test many times, draw the filter medium of in 200 ℃～300 ℃, producing in sintering range, filter effect is better.
Described ultra-high molecular weight polyethylene is a weight average molecular weight greater than 1,000,000 polyethylene, and preferred particle diameter is 89 μ m～124 μ m.Ultra-high molecular weight polyethylene can obtain from domestic production producer, and the product of M-I type (molecular weight is 150 ± 500,000), M-II type (molecular weight is 250 ± 500,000), M-III type (molecular weight is 350 ± 500,000), M-IV type 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, because the molecular weight of ultra-high molecular weight polyethylene is big, melt viscosity is very high, fusion can not be flowed later, so utilize ultra-high molecular weight polyethylene to pass through compacting, the filter medium that sintering obtains forms micropore easily, can play the effect of ammonia nitrogen in the adsorbed water.
Zeolite molecular sieve is a kind of aluminosilicate of crystal type, has the structure and the feature of crystal, and the surface is a solid skeletal, and the effect of absorbing molecules can be played in inner hole.Have the duct to interconnect between the hole, molecule is passed through by the duct.Because the crystallographic property in hole, the pore-size distribution of molecular sieve is homogeneous very.Molecular sieve carries out selective absorption according to the size in its crystals hole to molecule, just adsorbs a certain size molecule and repels the molecule of big material, thereby be called " molecular sieve " visually.Zeolite molecular sieve in chemical industry as solid absorbent, can be used for gas and liquid drying, purifying, separate and recovery, can desorb by the material of its absorption, zeolite molecular sieve with after can regenerate, and heat endurance is strong.
Divide by duct size, the duct size is called micropore, mesoporous and large pore molecular sieve less than 2nm, 2～50nm with greater than the molecular sieve of 50nm.The commodity zeolite molecular sieve prefix number molecular sieve that crystal structure is different commonly used is classified in addition, and wherein the 13X zeolite molecular sieve also is sodium X type zeolite molecular sieve, and the aperture of 13X zeolite molecular sieve is
Can adsorb less than
Any molecule has than high-adsorption-capacity, faster the rate of adsorption.
As preferably, zeolite molecular sieve powder of the present invention is the micro porous molecular sieve powder, more preferably 13X micro porous molecular sieve powder.
Active carbon is a kind of porous carbon adsorbent, and it has as cellular abundant 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.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 can efficiently adsorb organic matter, heavy metal, the heterochromatic peculiar smell in the drinking-water, especially medical activated carbon, as product by the relevant drug surveilance standard of country, impurity content is lower, surface area is bigger, adsorption effect is also better, and is good especially to the absorption of color and smell, selects for use medical activated carbon can guarantee that filter medium is directly used in the processing of drinking water.
As preferably, it is the medicinal active powdered carbon of 74 μ m～89 μ m that activated carbon powder is selected particle diameter for use.
Atlapulgite is to be raw material with clay, through inorganic acidification, makes through water rinse, drying again, odorless, tasteless, nontoxic, water insoluble, organic solvent and various oils, absorption property is very strong, purposes is extremely wide, is used for decolouring and purification in the vegetable and animals oils highly industry; In petroleum industry, be used for Petropols, paraffin, paraffin oil, the decolouring of kerosene and purification; Paper industry be used for carbon paper coloring agent, fill out oil plant, dyestuff; Aspect forestry and soil-water protection,, eliminate the adhesive of oil in the water as the powder of fire extinguisher; At chemical industry as catalyst and catalytic carrier, the carrier of pesticide, agricultural chemicals and bactericide, rubber and filler for plastic, drier and filtering agent, the adsorbent of radiation refuse is studied it through the inventor and be can be used for adsorbing ammonia nitrogen in the drinking water.As preferably, the particle diameter of atlapulgite powder of the present invention is 61 μ m～89 μ m.
Gas generation agent of the present invention 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.As preferably, gas generation agent is at least a in Celogen Az, food-grade carbonic hydroammonium, the oxalic acid.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.
The present invention has carried out comparatively detailed description for several raw materials used in the step a) among the above-mentioned preparation method, and under the collaborative adduction of these several raw materials, the manganese in the water can fully be adsorbed.
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 2MPa 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 paper.
The present invention also provides following technical scheme: the filter core of ammonia nitrogen in a kind of removal drinking water that is made of above-mentioned filter medium.
The present invention also provides following technical scheme: a kind of purifier comprises above-mentioned filter medium or filter core.
The present invention also provides a kind of water dispenser that comprises above-mentioned purifier.
With respect to prior art, the filter medium that the invention has the advantages that preparation is to ammonia-N removal rate height in the drinking water, removal speed is fast, use simply, cost is low, can exempt the injury that ammonia nitrogen produces human body, be filter core owing to what use in addition, not powder,, be fit to home terminal drinking-water and handle so need not subsequent treatment.This filter medium is more than 98% to ammonia-N removal rate in the drinking water after testing.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, but should be appreciated that these describe just to further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.
Embodiment 1
(1) take by weighing ultra-high molecular weight polyethylene powder 220g, 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, and its molecular weight is 2,500,000;
(2) take by weighing 13X micro porous molecular sieve powder 120g, originate from the Pingxiang City richness and reach chemical filler Co., Ltd;
(3) take by weighing medicinal active powdered carbon 180g, the particle diameter of described medical activated carbon is 74 μ m～89 μ m;
(4) take by weighing atlapulgite powder 200g, originate from Inner Mongol profit Longhua worker Co., Ltd;
(5) take by weighing food-grade carbonic hydroammonium 100 grams, 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) mixed powder packing is gone in the tubular die, under the hydraulic pressure of 0.7MPa, suppress, 250 ℃ of sintering temperatures 140 minutes;
(8) naturally cool to 50 ℃ of demouldings then, promptly get the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Embodiment 2
(1) take by weighing ultra-high molecular weight polyethylene powder 300g, 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, and its molecular weight is 3,500,000;
(2) take by weighing 13X micro porous molecular sieve powder 200g, originate from Shanghai molecular sieve Co., Ltd;
(3) take by weighing medicinal active powdered carbon 100g, the particle diameter of described medical activated carbon is 74 μ m～89 μ m;
(4) take by weighing atlapulgite powder 120g, originate from Gongyi City ultra clean water material factory;
(5) take by weighing food-grade carbonic hydroammonium 80 grams, 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) mixed powder packing is gone in the tubular die, under the hydraulic pressure of 0.6MPa, suppress, 280 ℃ of sintering temperatures 130 minutes;
(8) naturally cool to 60 ℃ of demouldings then, promptly get the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Embodiment 3
(1) take by weighing ultra-high molecular weight polyethylene powder 350g, 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, and its molecular weight is 2,500,000;
(2) take by weighing 13X micro porous molecular sieve powder 250g, originate from the global chemical filler of Pingxiang City Co., Ltd;
(3) take by weighing medicinal active powdered carbon 200g, the particle diameter of described medical activated carbon is 74 μ m～89 μ m;
(4) take by weighing atlapulgite powder 220g, originate from Dongguan atlapulgite drier and open up gloomy chemical industry Co., Ltd;
(5) take by weighing Celogen Az 120 grams, 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) mixed powder packing is gone in the tubular die, under the hydraulic pressure of 0.8MPa, suppress, 220 ℃ of sintering temperatures 130 minutes;
(8) naturally cool to 40 ℃ of demouldings then, promptly get the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Embodiment 4
(1) take by weighing ultra-high molecular weight polyethylene powder 380g, described ultra-high molecular weight polyethylene is the M-I type product of Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, and its molecular weight is 1,500,000;
(2) take by weighing 13X micro porous molecular sieve powder 280g, originate from the safe really water-purifying material factory in Gongyi City;
(3) take by weighing medicinal active powdered carbon 220g, the particle diameter of described medical activated carbon is 74～89 microns;
(4) take by weighing atlapulgite powder 180g, originate from Nanjing Yadong Aotu Mining Co., Ltd.;
(5) take by weighing oxalic acid 150 grams, 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) mixed powder packing is gone in the tubular die, under the hydraulic pressure of 0.4MPa, suppress, 300 ℃ of sintering temperatures 120 minutes;
(8) naturally cool to 40 ℃ of demouldings then, promptly get the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Embodiment 5
Get the tubulose filter core 1 of the many minute apertures of embodiment 1～4 gained, 2,3,4, the liner two-layer nonwoven, the outsourcing two-layer nonwoven wraps polypropylene porous net at skin again, and 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 to the removal effect of the ammonia nitrogen in the drinking water.As shown in table 1, for adopting filter core that embodiment 1～4 provides to the ammonia nitrogen content before and after the drinking water treatment.
Table 1 uses the ammonia-nitrogen content in the water of filter core processing front and back, unit: mg/L
As can be seen from Table 1, the ammonia nitrogen that utilizes filter core of the present invention to remove in the water has been obtained good effect, and clearance is more than 98%, and this filter core is fit to the needs of home terminal drinking water treatment very much
More than filter medium that is used for removing the drinking water ammonia nitrogen provided by the present invention and preparation method thereof and the filter core that is made of this filter medium are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. a preparation method of filter medium that is used for removing the drinking water ammonia nitrogen is characterized in that, comprises the steps:
A) raw material that will comprise ultra-high molecular weight polyethylene powder, zeolite molecular sieve powder, activated carbon powder, atlapulgite powder and gas generation agent mixes, and the weight ratio of described ultra-high molecular weight polyethylene powder, zeolite molecular sieve powder, activated carbon powder, atlapulgite powder and gas generation agent is: 200～400: 80～300: 80～200: 80～250: 50～150;
B) mixture of step a) gained is suppressed sintering, cooling in mould.
2. preparation method according to claim 1, it is characterized in that the weight ratio of described ultra-high molecular weight polyethylene powder, zeolite molecular sieve powder, activated carbon powder, atlapulgite powder and gas generation agent is: 250～300: 100～260: 100～180: 100～200: 80～120.
3. preparation method according to claim 1 and 2 is characterized in that, the particle diameter of described ultra-high molecular weight polyethylene powder is 89 μ m～124 μ m.
4. preparation method according to claim 1 and 2 is characterized in that, described zeolite molecular sieve powder is the micro porous molecular sieve powder.
5. preparation method according to claim 1 and 2 is characterized in that, described activated carbon powder is the medicinal active powdered carbon of particle diameter 74 μ m～89 μ m.
6. preparation method according to claim 1 and 2, the particle diameter that it is characterized in that described atlapulgite powder is 61 μ m～89 μ m.
7. the filter medium that is used for removing the drinking water ammonia nitrogen that obtains according to each described preparation method in the claim 1 to 6.
8. a filter core is characterized in that, is made of the described filter medium of claim 7.
9. a purifier is characterized in that, comprises described filter medium of claim 7 or the described filter core of claim 8.
10. a water dispenser is characterized in that, comprises the described purifier of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110162569 CN102266691B (en) | 2011-06-16 | 2011-06-16 | Filtering medium for removing ammonia nitrogen from drinking water and preparation method thereof |
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| CN 201110162569 CN102266691B (en) | 2011-06-16 | 2011-06-16 | Filtering medium for removing ammonia nitrogen from drinking water and preparation method thereof |
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Cited By (6)
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| CN103463870A (en) * | 2013-06-20 | 2013-12-25 | 天长市天乐电器厂 | Filter core used for filtering harmful gas and preparation method thereof |
| CN105289548A (en) * | 2015-12-01 | 2016-02-03 | 佛山市农业总公司 | Filtering medium and filter core for removing iron, manganese and ammonia nitrogen from drinking water and preparation method of filtering medium |
| CN105413655A (en) * | 2015-12-01 | 2016-03-23 | 周羿 | Filter medium for removing aniline in drinking water, filter element and preparation method |
| CN107149809A (en) * | 2017-04-27 | 2017-09-12 | 舒尔环保科技（合肥）有限公司 | A kind of sterilizing and air filtration core and preparation method thereof |
| CN107349921A (en) * | 2017-09-07 | 2017-11-17 | 广州尊卓环保科技有限公司 | Filter medium, filter core and the preparation method of methacrylaldehyde in a kind of removal frying oil |
| CN107486173A (en) * | 2017-09-07 | 2017-12-19 | 广州尊卓环保科技有限公司 | For removing the filter medium, filter core and preparation method of benzopyrene from edible oil |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103463870A (en) * | 2013-06-20 | 2013-12-25 | 天长市天乐电器厂 | Filter core used for filtering harmful gas and preparation method thereof |
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| CN105413655A (en) * | 2015-12-01 | 2016-03-23 | 周羿 | Filter medium for removing aniline in drinking water, filter element and preparation method |
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| CN107486173A (en) * | 2017-09-07 | 2017-12-19 | 广州尊卓环保科技有限公司 | For removing the filter medium, filter core and preparation method of benzopyrene from edible oil |
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| CN102266691B (en) | 2013-09-18 |
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