CN103447012A - Filtering medium for removing radioactive radon in drinking water and preparation method thereof - Google Patents
Filtering medium for removing radioactive radon in drinking water and preparation method thereof Download PDFInfo
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Abstract
The invention provides a preparation method of a filtering medium for removing radioactive radon in drinking water. The preparation method comprises the following steps of: mixing ultra-high molecular weight polyethylene powder, medical activated carbon powder, expanded vermiculite powder, clinoptilolite powder, barite powder and a pore-forming agent at a weight ratio of (35-45):(5-15):(35-45):(35-45):(35-45):(5-15) to obtain a mixture; pressing the obtained mixture in a die, sintering and cooling, wherein the sintering temperature ranges from 230 to 250 DEG C, and the sintering time ranges from 90 to 120 minutes. The raw materials can be formed into an interlinked meshy structure after being sintered, so that the radioactive radon can be effectively adsorbed, and the removal rate of the radioactive radon in the drinking water can be over 92%; the preparation method is simple and convenient in use and low in cost. A filter element made of the filtering medium is convenient to use, free of subsequent treatment and suitable for household terminal drinking water treatment.
Description
Technical field
The present invention relates to the filter medium field, particularly a kind of filter medium of removing radioactive radon in drinking water and preparation method thereof, the filter core formed by this filter medium, water purifying plant and drinking Fountains.
Background technology
Chernobyl nuclear leakage in 1986, in March, 2011 Fukushima, Japan nuclear leakage allows people successively by being shocked.Nuclear leakage is nuclear radiation, i.e. radioactive substance to the mankind's damage main manifestations.Radioactive substance can produce ionizing radiation in decay process, and ionizing radiation can interrupt various atoms or the intermolecular chemical bond in tissue, and the inside of human body environment is being become to serious injury; Especially increase the incidence of cancer, distortion, heredity pathology, particularly evident on the impact of pregnant woman and fetus.The symptom that infects radiation illness mainly contains: giddy, insomnia, rubefaction, ulcer, hemorrhage, alopecia, leukaemia, vomiting, diarrhoea etc.
In the recent period, Chinese Academy of Engineering and Chinese environmental protection section point out in " report of Chinese environmental Macroeconomic strategy " of issue combined in Beijing, " the Chinese environmental situation is still severe, and wherein, the whole nation also has nearly 2000 radioactive sources lost or out of control, has potential safety hazard ".
Show after deliberation, at present the radioactive pollution in environment is mainly derived from construction material the radon element exceeds standard as the radon element in granite exceeds standard, in surface water and well water.Adopt ion-exchange to remove the radon in water, cost is higher; Adopt evaporation concentration method to remove the radon element, the facility complexity, power consumption is large, and the operation and maintenance expense is high, is not suitable for Drinking Water.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of filter medium of removing radioactive radon in drinking water and preparation method thereof, this filter medium is high to the clearance of radioactive radon, easy to use, cost is low, and the filter core, purifier and the water dispenser that this filter medium, consist of also are provided.
The invention discloses a kind of preparation method for the filter medium of removing the drinking water radioactive radon, comprise the steps:
(A) ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent are mixed, obtain mixture;
The weight ratio of described ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent is (35～45): (5～15): (35～45): (35～45): (35～45): (5～15);
(B) mixture of step (A) gained is suppressed in mould, sintering, cooling;
The temperature of described sintering is 230～250 ℃, and the time of described sintering is 90～120 minutes.
Preferably, the weight ratio of described ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent is (37～42): (7～12): (38～43): (37～42): (37～42): (7～12).
Preferably, the particle diameter of described blanc fixe is 80～100 μ m.
Preferably, the particle diameter of described expanded vermiculite powder is 75～85 μ m.
Preferably, the particle diameter of described medicinal active carbon dust is 74 μ m～89 μ m.
Preferably, the particle diameter of described ultra-high molecular weight polyethylene powder is 70 μ m～80 μ m.
The invention discloses that described preparation method obtains for removing the filter medium of drinking water radioactive radon.
The invention discloses a kind of filter core, formed by the described filter medium of technique scheme.
The invention discloses a kind of purifier, comprise the described filter medium of technique scheme or the described filter core of technique scheme.
The invention discloses a kind of water dispenser, comprise the described purifier of technique scheme.
Compared with prior art, the present invention is (35～45) by weight ratio: (5～15): (35～45): (35～45): (35～45): the ultra-high molecular weight polyethylene powder of (5～15), medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent mix, compacting in mould, sintering is cooling, obtains filter medium.Ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent are after sintering, the network structure that formation is cross-linked with each other, effectively the Adsorption of Radioactive radon, high for radioactive radon clearance in drinking water, easy to use, cost is low.The filter core of being made by above-mentioned filter medium is easy to use, without subsequent treatment, is applicable to home terminal drinking-water and processes.After testing, this filter medium reaches more than 92% the clearance of radioactive radon in drinking water.
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 are described is for further illustrating the features and advantages of the present invention, rather than limiting to the claimed invention.
The embodiment of the invention discloses a kind of preparation method for the filter medium of removing the drinking water radioactive radon, comprise the steps:
(A) ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent are mixed, obtain mixture;
The weight ratio of described ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent is (35～45): (5～15): (35～45): (35～45): (35～45): (5～15);
(B) mixture of step (A) gained is suppressed in mould, sintering, cooling;
The temperature of described sintering is 230～250 ℃, and the time of described sintering is 90～120 minutes.
It is raw material that ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent are take in the present invention.
Described ultra-high molecular weight polyethylene powder is preferably the polyethylene that weight average molecular weight is greater than 1,000,000, the polyethylene that more preferably molecular weight is 400～5,000,000, and preferred particle diameter is 70 μ m～80 μ m.Ultra-high molecular weight polyethylene can obtain from domestic production producer, as Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be can provide 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 (molecular weight is for being greater than 4,000,000) equal-specification.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 large, melt viscosity is very high, melting can not be flowed later, so utilize ultra-high molecular weight polyethylene to pass through compacting, the filter medium that sintering obtains, easily form micropore, can play the effect of radioactive radon in adsorbed water.
Activated carbon can efficient adsorption organic matter, heavy metal, heterochromatic peculiar smell in drinking-water, especially medicinal active carbon, product as the drug surveilance standard of being correlated with by country, impurity content is lower, surface area is larger, adsorption effect is also better, especially good to the absorption of color and smell, selects medicinal active carbon can guarantee that filter medium is directly used in the processing of drinking water.Preferably the specific area of medicinal active carbon is not less than 500 meters squared per gram, more preferably is not less than 1000 meters squared per gram.The particle diameter of described medicinal active carbon dust is preferably 74 μ m～89 μ m, more preferably 78 μ m～80 μ m.
Described vermiculite power be a kind of layer structure containing the water aluminosilicate of magnesium, be the product of the natural minerals weathering alteration such as biotite.The hydrone of vermiculite power interlayer is through high temperature sintering, and volume increases, and forms expanded vermiculite powder.The expanded vermiculite powder specific area is large, has higher layer charge number, therefore has higher cation exchange capacity and stronger cation exch ange adsorption ability.Described expanded vermiculite powder is preferably used after modification, and the method for described modification is preferably:
After expanded vermiculite powder is pulverized, add the sodium hydroxide solution of 0.5～1.5mol/L, solid-to-liquid ratio is 1:10～20, soaks 20～30 hours, and water rinses post-drying, obtains the expanded vermiculite powder of modification.
The particle diameter of described expanded vermiculite powder is preferably 75～85 μ m, more preferably 76～80 μ m.
What described clinoptilolite powder was natural zeolite is a kind of.The particle diameter of described clinoptilolite powder is preferably 80～100 μ m.After described clinoptilolite powder and blanc fixe and other 4 kinds of raw material sintering, netted knot and the charge property of formation have strengthened the suction-operated to radon.
Described blanc fixe is that chemical composition is BaSO
4, crystal belongs to the sulfate mineral of quadrature (tiltedly side) crystallographic system.Often be thick plate-like or column crystal, mostly be compact massive or tabular, granular aggregate.The particle diameter of described blanc fixe is preferably 80～100 μ m, more preferably 90～98 μ m.Described blanc fixe and clinoptilolite powder and expanded vermiculite powder, after sintering, form synergy mutually, have strengthened the suction-operated to radon.
After expanded vermiculite powder, clinoptilolite powder, blanc fixe mix, multiple duct is interlaced, forms and interacts, be conducive to the absorption of radioactive radon, especially after three and other 3 kinds of raw material sintering, form crosslinked network structure, more be conducive to remove radioactive radon.Gas generation agent of the present invention is that a class is easily decomposed a large amount of gas 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 one in Celogen Az, food stage carbonic hydroammonium, oxalic acid.Wherein, food stage carbonic hydroammonium also claims AMMONIUM BICARBONATE FOOD GRADE, with technical grade carbonic hydroammonium, distinguishes.Although technical grade carbonic hydroammonium also has the effect of sending out hole, it may contain the impurity of insalubrity, should not be as the raw materials for production of Drinking Water Filtration medium.
In the present invention, at first described raw material is mixed, the weight ratio of described ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent is (35～45): (5～15): (35～45): (35～45): (35～45): (5～15) are preferably (37～42): (7～12): (38～43): (37～42): (37～42): (7～12).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 depending on the type of blender, but is advisable with the dust of avoiding kicking up.
After obtaining mixture, by the compacting in mould of described mixture, sintering, cooling, can obtain filter medium.After described mixing, thing is filled in pre-designed mould, and by pressurization, by its compacting, pressure generally is not more than 2MPa, and adapts with the material of mould therefor; Mould can be by aluminium, cast iron, steel or any suitable material manufacture 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 can be adsorbed onto the commercially available releasing agent on filter medium hardly, also can use processing release paper.The temperature of described sintering is 230～250 ℃, is preferably 235～245 ℃, and the time of described sintering is 90～120 minutes, is preferably 100～115 minutes.
In the present invention, after expanded vermiculite powder, clinoptilolite powder, blanc fixe mix, multiple duct is interlaced, form and interact, be conducive to the absorption of radioactive radon, especially after three and other 3 kinds of raw material sintering, form crosslinked network structure, more be conducive to remove radioactive radon.After described 6 kinds of raw materials advance oversintering, there is collaborative adduction, form the network structure be cross-linked with each other, effectively the radioactive radon in adsorbed water.
Adopt described filter medium to be processed the drinking water that contains radioactive radon, result shows, filter medium of the present invention reaches more than 95% for the clearance of radioactive radon.
The invention discloses that the described preparation method of a kind of technique scheme obtains for removing the filter medium of drinking water radioactive radon.
The present invention also provides following technical scheme: the filter core of radioactive radon in a kind of removal drinking water consisted of above-mentioned filter medium.The present invention is not particularly limited the method for preparing filter core, according to mode well known to those skilled in the art, gets final product.
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.
In order further to understand the present invention, below in conjunction with embodiment, to provided by the invention, for filter medium of removing the drinking water radioactive radon and preparation method thereof, describe, protection scope of the present invention is not limited by the following examples.
Embodiment 1
(1) take ultra-high molecular weight polyethylene powder 350g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,000,000;
(2) take medicinal active carbon dust 50g, the particle diameter of described medicinal active carbon is 74 μ m～89 μ m;
(3) take expanded vermiculite powder 350g, described expanded vermiculite powder is that the product that the particle diameter that can vermiculite be processed into production is 75～80 μ m is converged in Hebei;
(4) take clinoptilolite powder 350g and blanc fixe 420g, described blanc fixe is the product that the Suizhou particle diameter that too blanc fixe Co., Ltd in source produces is 80～90 μ m; The product that the particle diameter that described clinoptilolite powder is the production of port, Xinyang rainbow insulation material Co., Ltd is 80～90 μ m;
(5) take food stage carbonic hydroammonium 50g, purity reaches more than 99.99%;
(6) above-mentioned 6 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(7) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.8MPa, at 230 ℃ of temperature, sintering is 95 minutes;
(8) naturally cool to 60 ℃ of then demouldings, 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 ultra-high molecular weight polyethylene powder 370g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,300,000;
(2) take medicinal active carbon dust 170g, the particle diameter of described medicinal active carbon is 78 μ m～80 μ m;
(3) take expanded vermiculite powder 450g, described expanded vermiculite powder is that the product that the particle diameter that can vermiculite be processed into production is 75～80 μ m is converged in Hebei;
(4) take clinoptilolite powder 370g and blanc fixe 400g, described blanc fixe is the product that the Suizhou particle diameter that too blanc fixe Co., Ltd in source produces is 80～90 μ m; The product that the particle diameter that described clinoptilolite powder is the production of port, Xinyang rainbow insulation material Co., Ltd is 80～90 μ m;
(5) take food stage carbonic hydroammonium 80g, purity reaches more than 99.99%;
(6) above-mentioned 6 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(7) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.7MPa, at 235 ℃ of temperature, sintering is 120 minutes;
(8) naturally cool to 60 ℃ of then demouldings, 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 ultra-high molecular weight polyethylene powder 400g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,500,000;
(2) take medicinal active carbon dust 200g, the particle diameter of described medicinal active carbon is 74 μ m～80 μ m;
(3) after natural expanded vermiculite powder is pulverized, the sodium hydroxide solution that adds 1mol/L, solid-to-liquid ratio is 1:15, soak 25 hours, water rinses post-drying, obtain the expanded vermiculite powder of modification, described natural expanded vermiculite powder is that the product that the particle diameter that can vermiculite be processed into production is 75～80 μ m is converged in Hebei; Take modified expanded vermiculite power 370g;
(4) take Celogen Az 100g, purity reaches more than 99.99%;
(5) take clinoptilolite powder 400g and blanc fixe 400g, described blanc fixe is the product that the Suizhou particle diameter that too blanc fixe Co., Ltd in source produces is 80～90 μ m; The product that the particle diameter that described clinoptilolite powder is the production of port, Xinyang rainbow insulation material Co., Ltd is 80～90 μ m;
(6) above-mentioned 6 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(7) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.6MPa, at 240 ℃ of temperature, sintering is 115 minutes;
(8) naturally cool to 60 ℃ of then demouldings, 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 ultra-high molecular weight polyethylene powder 420g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,700,000;
(2) take medicinal active carbon dust 220g, the particle diameter of described medicinal active carbon is 74 μ m～80 μ m;
(3) take expanded vermiculite powder 420g, described expanded vermiculite powder is that the product that the particle diameter that can vermiculite be processed into production is 75～80 μ m is converged in Hebei;
(4) take oxalic acid 130g, purity reaches more than 99.99%;
(5) take clinoptilolite powder 420g and blanc fixe 370g, described blanc fixe is the product that the Suizhou particle diameter that too blanc fixe Co., Ltd in source produces is 80～90 μ m; The product that the particle diameter that described clinoptilolite powder is the production of port, Xinyang rainbow insulation material Co., Ltd is 80～90 μ m;
(6) above-mentioned 6 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(7) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.6MPa, at 245 ℃ of temperature, sintering is 100 minutes;
(8) naturally cool to 60 ℃ of then demouldings, 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, then wrap the polypropylene porous web at skin, the bonding upper connection end cap in filter core two ends, be positioned in stainless steel or plastic casing, for the treatment of drinking water, after testing, this filter core is good to the removal effect of the radioactive radon in drinking water.As shown in table 1, be the filter core that adopts embodiment 1～4 the to provide content to the radioactive radon before and after drinking water treatment.
Table 1 is used filter core to process the reflectivity radon contents in the water of front and back, unit: Bq/m
3.
As can be seen from Table 1, the radioactive radon that utilizes filter core of the present invention to remove in water has been obtained good effect, and clearance is more than 95%.
Therefore filter core of the present invention is good to the removal effect of radioactive radon in drinking water, is applicable to very much the needs of home terminal drinking water treatment.
Comparative example 1
(1) take ultra-high molecular weight polyethylene powder 420g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,700,000;
(2) take medicinal active carbon dust 220g, the particle diameter of described medicinal active carbon is 74 μ m～80 μ m;
(3) take expanded vermiculite powder 420g, described expanded vermiculite powder is that the product that the particle diameter that can vermiculite be processed into production is 75～80 μ m is converged in Hebei;
(4) take oxalic acid 130g, purity reaches more than 99.99%;
(5) above-mentioned 4 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(6) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.6MPa, at 245 ℃ of temperature, sintering is 100 minutes;
(7) naturally cool to 60 ℃ of then demouldings, the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Comparative example 2
(1) take ultra-high molecular weight polyethylene powder 420g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,700,000;
(2) take medicinal active carbon dust 220g, the particle diameter of described medicinal active carbon is 74 μ m～80 μ m;
(3) take oxalic acid 130g, purity reaches more than 99.99%;
(4) take clinoptilolite powder 420g, the product that the particle diameter that described clinoptilolite powder is the production of port, Xinyang rainbow insulation material Co., Ltd is 80～90 μ m;
(5) above-mentioned 4 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(6) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.6MPa, at 245 ℃ of temperature, sintering is 100 minutes;
(7) naturally cool to 60 ℃ of then demouldings, the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Comparative example 3
(1) take ultra-high molecular weight polyethylene powder 420g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,700,000;
(2) take medicinal active carbon dust 220g, the particle diameter of described medicinal active carbon is 74 μ m～80 μ m;
(3) take oxalic acid 130g, purity reaches more than 99.99%;
(4) take blanc fixe 370g, described blanc fixe is the product that the Suizhou particle diameter that too blanc fixe Co., Ltd in source produces is 80～90 μ m;
(5) above-mentioned 4 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(6) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.6MPa, at 245 ℃ of temperature, sintering is 100 minutes;
(7) naturally cool to 60 ℃ of then demouldings, the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Comparative example 4
(1) take ultra-high molecular weight polyethylene powder 420g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,700,000;
(2) take medicinal active carbon dust 220g, the particle diameter of described medicinal active carbon is 74 μ m～80 μ m;
(3) take oxalic acid 130g, purity reaches more than 99.99%;
(4) take clinoptilolite powder 420g and blanc fixe 370g, described blanc fixe is the product that the Suizhou particle diameter that too blanc fixe Co., Ltd in source produces is 80～90 μ m; The product that the particle diameter that described clinoptilolite powder is the production of port, Xinyang rainbow insulation material Co., Ltd is 80～90 μ m;
(5) above-mentioned 5 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(6) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.6MPa, at 245 ℃ of temperature, sintering is 100 minutes;
(7) naturally cool to 60 ℃ of then demouldings, the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Comparative example 5
(1) take ultra-high molecular weight polyethylene powder 420g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,700,000;
(2) take medicinal active carbon dust 220g, the particle diameter of described medicinal active carbon is 74 μ m～80 μ m;
(3) take expanded vermiculite powder 420g, described expanded vermiculite powder is that the product that the particle diameter that can vermiculite be processed into production is 75～80 μ m is converged in Hebei;
(4) take oxalic acid 130g, purity reaches more than 99.99%;
(5) take clinoptilolite powder 420g, the product that the particle diameter that described clinoptilolite powder is the production of port, Xinyang rainbow insulation material Co., Ltd is 80～90 μ m;
(6) above-mentioned 5 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(7) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.6MPa, at 245 ℃ of temperature, sintering is 100 minutes;
(8) naturally cool to 60 ℃ of then demouldings, the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Comparative example 6
(1) take ultra-high molecular weight polyethylene powder 420g, the M-IV type product that described ultra-high molecular weight polyethylene is Second Factory of Auxiliary Agent of Orient Petrochemical Industry Co., Ltd., Be, its molecular weight is 4,700,000;
(2) take medicinal active carbon dust 220g, the particle diameter of described medicinal active carbon is 74 μ m～80 μ m;
(3) take expanded vermiculite powder 420g, described expanded vermiculite powder is that the product that the particle diameter that can vermiculite be processed into production is 75～80 μ m is converged in Hebei;
(4) take oxalic acid 130g, purity reaches more than 99.99%;
(5) take blanc fixe 370g, described blanc fixe is the product that the Suizhou particle diameter that too blanc fixe Co., Ltd in source produces is 80～90 μ m;
(6) above-mentioned 5 kinds of powder are put into to the mechanical agitator stirring mixes in 10 minutes;
(7) mixed powder packing is entered in tubular die, suppress under the hydraulic pressure of 0.6MPa, at 245 ℃ of temperature, sintering is 100 minutes;
(8) naturally cool to 60 ℃ of then demouldings, the tubulose filter core of many minute apertures.
The diameter of the filter core of preparation is 50mm, and length is 200mm.
Comparative example 7
Get the tubulose filter core 5,6,7 of the many minute apertures of comparative example 1～6 gained, 8,9,10, the liner two-layer nonwoven, the outsourcing two-layer nonwoven, then wrap the polypropylene porous web at skin, the bonding upper connection end cap in filter core two ends, be positioned in stainless steel or plastic casing, for the treatment of drinking water, after testing, this filter core is good to the removal effect of the radioactive radon in drinking water.As shown in table 2, be the filter core that adopts comparative example 1～6 the to provide content to the radioactive radon before and after drinking water treatment.
Table 2 is used filter core to process the reflectivity radon contents in the water of front and back, unit: Bq/m
3.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles 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 the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the spirit or scope of the present invention, realization in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the preparation method for the filter medium of removing the drinking water radioactive radon, comprise the steps:
(A) ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent are mixed, obtain mixture;
The weight ratio of described ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent is (35～45): (5～15): (35～45): (35～45): (35～45): (5～15);
(B) mixture of step (A) gained is suppressed in mould, sintering, cooling;
The temperature of described sintering is 230～250 ℃, and the time of described sintering is 90～120 minutes.
2. preparation method according to claim 1, it is characterized in that, the weight ratio of described ultra-high molecular weight polyethylene powder, medicinal active carbon dust, expanded vermiculite powder, clinoptilolite powder, blanc fixe and gas generation agent is (37～42): (7～12): (38～43): (37～42): (37～42): (7～12).
3. according to claim 1 or the described preparation method of 2 any one, it is characterized in that, the particle diameter of described blanc fixe is 80～100 μ m.
4. according to claim 1 or the described preparation method of 2 any one, it is characterized in that, the particle diameter of described expanded vermiculite powder is 75～85 μ m.
5. according to claim 1 or the described preparation method of 2 any one, it is characterized in that, the particle diameter of described medicinal active carbon dust is 74 μ m～89 μ m.
6. according to claim 1 or the described preparation method of 2 any one, it is characterized in that, the particle diameter of described ultra-high molecular weight polyethylene powder is 70 μ m～80 μ m.
7. according to the described preparation method of any one in claim 1 to 6, obtain for removing the filter medium of drinking water radioactive radon.
8. a filter core, is characterized in that, filter medium claimed in claim 7, consists of.
9. a purifier, is characterized in that, comprises filter medium claimed in claim 7 or filter core claimed in claim 8.
10. a water dispenser, is characterized in that, comprises purifier claimed in claim 9.
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Inventor after: Mao Jianying Inventor after: Luan Yuntang Inventor after: Zhang Chengbo Inventor before: Zhang Chengbo Inventor before: Luan Yuntang Inventor before: Mao Jianying |