CN102233261A - Filter medium for removing nitrite in drinking water and preparation method thereof - Google Patents
Filter medium for removing nitrite in drinking water and preparation method thereof Download PDFInfo
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- CN102233261A CN102233261A CN 201110162709 CN201110162709A CN102233261A CN 102233261 A CN102233261 A CN 102233261A CN 201110162709 CN201110162709 CN 201110162709 CN 201110162709 A CN201110162709 A CN 201110162709A CN 102233261 A CN102233261 A CN 102233261A
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- powder
- filter medium
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- nitrite
- drinking water
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- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 title claims abstract description 31
- 239000003651 drinking water Substances 0.000 title claims abstract description 23
- 235000020188 drinking water Nutrition 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010455 vermiculite Substances 0.000 claims abstract description 17
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 17
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 22
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 20
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 14
- 238000012986 modification Methods 0.000 claims description 13
- 230000004048 modification Effects 0.000 claims description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 8
- 238000011068 loading method Methods 0.000 claims description 7
- 230000006378 damage Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 229920010741 Ultra High Molecular Weight Polyethylene (UHMWPE) Polymers 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 238000005303 weighing Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 239000012752 auxiliary agent Substances 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 239000011812 mixed powder Substances 0.000 description 5
- -1 polyethylene Polymers 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000006408 oxalic acid Nutrition 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- NBOCQTNZUPTTEI-UHFFFAOYSA-N 4-[4-(hydrazinesulfonyl)phenoxy]benzenesulfonohydrazide Chemical compound C1=CC(S(=O)(=O)NN)=CC=C1OC1=CC=C(S(=O)(=O)NN)C=C1 NBOCQTNZUPTTEI-UHFFFAOYSA-N 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 108010061951 Methemoglobin Proteins 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 229960001927 cetylpyridinium chloride Drugs 0.000 description 2
- YMKDRGPMQRFJGP-UHFFFAOYSA-M cetylpyridinium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCC[N+]1=CC=CC=C1 YMKDRGPMQRFJGP-UHFFFAOYSA-M 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ASRSBXRMOCLKQC-UHFFFAOYSA-N 2-(4-chloro-2-methylphenoxy)-n-methoxyacetamide Chemical compound CONC(=O)COC1=CC=C(Cl)C=C1C ASRSBXRMOCLKQC-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 206010011703 Cyanosis Diseases 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 208000036626 Mental retardation Diseases 0.000 description 1
- 241001495402 Nitrococcus Species 0.000 description 1
- 208000005374 Poisoning Diseases 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 235000009827 Prunus armeniaca Nutrition 0.000 description 1
- 244000018633 Prunus armeniaca Species 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 208000005718 Stomach Neoplasms Diseases 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- RLGQACBPNDBWTB-UHFFFAOYSA-N cetyltrimethylammonium ion Chemical compound CCCCCCCCCCCCCCCC[N+](C)(C)C RLGQACBPNDBWTB-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003743 erythrocyte Anatomy 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000003754 fetus Anatomy 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 231100000003 human carcinogen Toxicity 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000000618 nitrogen fertilizer Substances 0.000 description 1
- XKLJHFLUAHKGGU-UHFFFAOYSA-N nitrous amide Chemical compound ON=N XKLJHFLUAHKGGU-UHFFFAOYSA-N 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011022 opal Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 201000000498 stomach carcinoma Diseases 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a preparation method of a filter medium for removing nitrite in drinking water. The preparation method comprises the following steps: (a) mixing raw materials such as activated carbon powder, ultrahigh molecular weight polyethylene (UHMWPE), vermiculite powder, diatomite powder and a pore-forming agent at a weight ratio of (80-250):(150-400):(80-200):(60-150):(50-150); and (b) pressing, sintering and cooling the mixture obtained in the step (a) in a die to finally obtain the filter medium. The obtained filter medium has high removal rate for the nitrite in the water, thus being applicable to the drinking water polluted by the nitrite and preventing damage of the nitrite on a human body; the filter medium is simple in use and low in cost; and in addition, a filter element is used instead of powder without subsequent treatment, thus the filter medium provided by the invention is suitable for home terminal drinking water treatment. Detection shows that the filter medium has high removal rate for the nitrite in the drinking water and the removal rate is over 95%.
Description
Technical field
The present invention relates to a kind of filter medium of removing nitrite 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
Because excessive nitrogen fertilizer application, China in nearly decades the nitrate concentration in underground water and the surface water constantly increase, nitrate can change into nitrite under the effect of nitrococcus, according to investigation, China has the underground water in 1/3 city polluted by nitrite.The 62 mouthfuls of deep-well sampling results in Zhengzhou City, Henan were shown in 2000: wherein the nitrite of 21 mouthfuls of well water exceeds standard, and what have competes to exceed standard 50 times.
Nitrite is a kind of extremely toxic substance, after it enters human body, the low Ferri-hemoglobin in the red blood cell can be oxidized to ferrihemoglobin, make its forfeiture take oxygen and oxygen delivery capacity, cause histanoxia and a series of poisoning symptoms occur that present " intestines source property cyanosis ", serious meeting causes death; Nitrite makes fetus teratogenesis shape in addition, makes human carcinogen's danger, and it combines with amine in the human stomach, forms nitrosamine etc., is to cause the cancer of the stomach thing by force; Human long-term picked-up nitrite also can cause children mental retardation, the conditioned reflex dull of the vision and the sense of hearing.
The nitrite of removing in the drinking water has than multi-method at present, and oxidizing process is used O
3, ultraviolet light, H
2O
2Deng nitrite being carried out oxidation, but the loaded down with trivial details inconvenience of process; The counter-flushing liquid of ion-exchange is handled comparatively trouble, easily causes secondary pollution; The counter-infiltration cost is higher, needs a large amount of electric energy and water, and concentrate is difficult to handle, and easily produces secondary pollution.
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 also provides the filter core, purifier and the water dispenser that are made of this filter medium to the clearance height of the nitrite in the drinking water.
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 nitrite comprises the steps:
A) raw material that will comprise activated carbon powder, ultra-high molecular weight polyethylene powder, vermiculite power, diatomite in powder and gas generation agent mixes, and the weight ratio of described activated carbon powder, ultra-high molecular weight polyethylene powder, vermiculite power, diatomite in powder and gas generation agent is: 80～250: 150～400: 80～200: 60～150: 50～150;
B) mixture of step a) gained is suppressed sintering, cooling in mould.
As preferably, the weight ratio of described activated carbon powder, ultra-high molecular weight polyethylene powder, vermiculite power, diatomite in powder and gas generation agent is: 120～200: 200～300: 100～180: 80～120: 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.
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.
As preferably, it is the active carbon loading silver of 74 μ m～104 μ m that active carbon is selected particle diameter for use.Active carbon loading silver is with the adsorption capacity of active carbon and the antibiotic property combination of silver, not only water pollutant there is suction-operated, the effect that also has bactericidal, thereby can breed bacteria in the active carbon, avoid that content of nitrite increases in the water, can also remove peculiar smell and trace toxic harmful substance in the water.
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～104 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 nitrite in the adsorbed water.
Vermiculite is a kind of natural, nontoxic mineral matter, can expand under high temperature action.Vermiculite power is powdered through high-temperature roasting, screening, attrition process by the fabric and raw-vermiculite raw ore.Contain a lot of pores in the vermiculite power particle, very big specific area is arranged, serve many purposes, can be used as construction material, fire-proof insulation material, soil conditioner etc., the inventor uses it for the nitrite in the absorption drinking water after deliberation, has obtained good effect.As preferably, the particle diameter of vermiculite power of the present invention is 44 μ m～74 μ m.
Diatomite is made up of the remains of the very high diatom of oxycompound, radiolitid or sponge, and the silica type in the diatom skeleton is similar to opal or moisture silica, mainly by SiO
2Form, and contain a spot of Fe
2O
3, CaO, MgO, Al
2O
3And organic impurities.It is light yellow or light grey that diatomite is usually, and matter is soft, porous and lighter.Diatomite mainly originates in Shengzhou, Zhejiang Province city in China.
Usually can carry out modification to diatomite and handle the water treatment capacity that improves it, as preferably, the modification infusorial earth powder after the present invention selects for use and handles through modification.
Described diatomite is carried out the method that modification handles is method known in those skilled in the art: hydrochloric acid or sulfuric acid washing activation; Low temperature or high-temperature roasting activation, for example method of modifying of being put down in writing among U.S. Pat 2701240 and the Chinese patent CN86106871A; Organic matter modification method, for example the employing cetyl trimethylammonium of being put down in writing among the Chinese patent CN200410079630.9 (CTMA), cetylpyridinium chloride (CPC) and the polyacrylamide method of diatomite being carried out modification.
After diatomite was handled with modification, oxide impurity content reduced, SiO
2Content increases, and specific area and pore volume also increase, so the carrier effect of terra silicea purificata is better than natural diatomaceous earth.
As preferably, it is that the modification infusorial earth powder of 89 μ m～124 μ m is used for the nitrite of adsorbed water that the present invention selects particle diameter for use.
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 PPCPs 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 nitrite 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 invention has the advantages that the clearance height of the filter medium of preparation to nitrite in the water, be applicable to the drinking water that is subjected to its pollution, exempt the injury that nitrite produces human body, easy to use, cost is low, 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 93% to the clearance of nitrite 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 medicinal active powdered carbon 100g, the particle diameter of described medical activated carbon is 74 μ m～104 μ m;
(2) take by weighing ultra-high molecular weight polyethylene powder 200g, 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;
(3) take by weighing vermiculite power 180g, originate from the Lingshou County, Hebei and become and mineral products processing factory;
(4) take by weighing diatomite 100g, originate from the emerging imperial diatomite in Shengzhou and develop Products Co., Ltd;
(5) take by weighing food-grade carbonic hydroammonium 70g, 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 0.9MPa, suppress, 250 ℃ of sintering temperatures 130 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 active carbon loading silver powder 120g, the particle diameter of described active carbon loading silver is 74 μ m～104 μ m, originates from five rings, Guangzhou active carbon factory;
(2) take by weighing ultra-high molecular weight polyethylene powder 250g, 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;
(3) take by weighing vermiculite power 120g, originate from Shijiazhuang City lattice Ruichang mining industry Co., Ltd;
(4) take by weighing diatomite 120g, originate from Qingdao Chuanyi Diatomite Co., Ltd.;
(5) take by weighing food-grade carbonic hydroammonium 100g, 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, 230 ℃ of sintering temperatures 140 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 active carbon loading silver powder 220g, the particle diameter of described active carbon loading silver is 74 μ m～104 μ m, originates from five rings, Guangzhou active carbon factory;
(2) take by weighing ultra-high molecular weight polyethylene powder 380g, 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;
(3) take by weighing vermiculite power 180g, originate from roc source, Shijiazhuang mineral products Co., Ltd;
(4) be the sulfuric acid impregnation process 18 hours of 6wt% with diatomite in powder concentration, in caustic alkali and the back wash, poach is 60 minutes again; Diatomite in powder drying after will boiling at 500 ℃ of roasting temperatures, is crushed to 89 μ m～124 μ m then, takes by weighing made modification infusorial earth powder 150g;
(5) take by weighing Celogen Az 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) mixed powder packing is gone in the tubular die, under the hydraulic pressure of 0.6MPa, suppress, 260 ℃ of sintering temperatures 150 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 4:
(1) take by weighing medicinal active powdered carbon 250g, the particle diameter of described medical activated carbon is 74 μ m～104 μ m;
(2) take by weighing ultra-high molecular weight polyethylene powder 350g, 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;
(3) take by weighing vermiculite power 200g, originate from the Lingshou County, Hebei and become and mineral products processing factory;
During (4) with diatomite in powder roasting to 600 ℃, the water quenching, dry then, be crushed to 89 μ m～124 μ m and obtain the modification infusorial earth powder, take by weighing made modification infusorial earth powder 130g;
(5) take by weighing oxalic acid 150g, 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 0.5MPa, 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 1,2,3 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, being positioned in stainless steel or the plastic casing, being used for Drinking Water, is example with the natrium nitrosum, after testing, this filter core is good to the removal effect of the nitrite in the drinking water.As shown in table 1, for adopting filter core that embodiment 1～4 the provides content to the natrium nitrosum before and after the drinking water treatment, the result shows that filter core provided by the invention is fit to the needs of home terminal drinking water treatment very much.
Table 1 uses the content of sodium nitrite in the water of filter core processing front and back, unit: mg/L
As can be seen from Table 1, the nitrite that utilizes filter core of the present invention to remove in the water has been obtained good effect, and clearance is more than 95%.
More than filter medium that is used for removing the drinking water nitrite 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 nitrite is characterized in that, comprises the steps:
A) raw material that will comprise activated carbon powder, ultra-high molecular weight polyethylene powder, vermiculite power, diatomite in powder and gas generation agent mixes, and the weight ratio of described activated carbon powder, ultra-high molecular weight polyethylene powder, vermiculite power, diatomite in powder and gas generation agent is: 80～250: 150～400: 80～200: 60～150: 50～150;
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 activated carbon powder, ultra-high molecular weight polyethylene powder, vermiculite power, diatomite in powder and gas generation agent is: 120～200: 200～300: 100～180: 80～120: 80～120.
3. preparation method according to claim 1 and 2 is characterized in that, described activated carbon powder is that particle diameter is the active carbon loading silver powder of 74 μ m～104 μ m.
4. 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～104 μ m.
5. preparation method according to claim 1 and 2 is characterized in that, the particle diameter of described vermiculite power is 44 μ m～74 μ m.
6. preparation method according to claim 1 and 2 is characterized in that, described diatomite in powder is that particle diameter is the modification infusorial earth powder of 89 μ m～124 μ m.
7. the filter medium that is used for removing the drinking water nitrite 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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| CN103143204A (en) * | 2013-03-27 | 2013-06-12 | 李彤 | Method for preparing active carbon composite filter core |
| CN104028250A (en) * | 2014-06-24 | 2014-09-10 | 潘峰 | Filtering medium for removing aluminum in drinking water, filter element and method for preparing filtering medium |
| CN104043288A (en) * | 2014-05-20 | 2014-09-17 | 浙江朝晖过滤技术股份有限公司 | Nnano-silver diatomite antibacterial filter core and preparation method thereof |
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| CN101844005A (en) * | 2009-03-27 | 2010-09-29 | 周奇迪 | Filter medium for removing benzene and homologous compounds thereof from drinking water and preparation method thereof |
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| CN101683609A (en) * | 2008-09-26 | 2010-03-31 | 周奇迪 | Filter medium used for removing nitrite in water and preparation method thereof |
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| CN103143204A (en) * | 2013-03-27 | 2013-06-12 | 李彤 | Method for preparing active carbon composite filter core |
| CN103143204B (en) * | 2013-03-27 | 2015-03-25 | 李彤 | Method for preparing active carbon composite filter core |
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| CN104043288B (en) * | 2014-05-20 | 2016-04-06 | 浙江朝晖过滤技术股份有限公司 | Antibacterial filter core of a kind of Nano Silver diatomite and preparation method thereof |
| CN104028250A (en) * | 2014-06-24 | 2014-09-10 | 潘峰 | Filtering medium for removing aluminum in drinking water, filter element and method for preparing filtering medium |
| CN104028250B (en) * | 2014-06-24 | 2016-05-04 | 潘峰 | For removing filter medium, filter core and the preparation method of Aluminium in Drinking Water |
| CN104587959A (en) * | 2015-01-29 | 2015-05-06 | 慈溪市天泉电器科技有限公司 | Filter medium for removing endosulfan from water as well as filter element and preparation method of filter medium |
| CN106215511A (en) * | 2016-06-15 | 2016-12-14 | 山东智汇专利运营有限公司 | A kind of defecator of teaching and preparation method thereof |
| CN107126762A (en) * | 2017-05-22 | 2017-09-05 | 杭州铭族科技有限公司 | One kind removes medicine and personal care articles in drinking water（PPCPs）Filter medium, filter core and preparation method |
| CN108147509A (en) * | 2018-01-05 | 2018-06-12 | 厦门大学 | It is a kind of to carry silver-colored diatomite carbon membrane and preparation method thereof |
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