CN110357313A - A kind of efficient absorption and filter method producing pure water - Google Patents
A kind of efficient absorption and filter method producing pure water Download PDFInfo
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- CN110357313A CN110357313A CN201910758117.9A CN201910758117A CN110357313A CN 110357313 A CN110357313 A CN 110357313A CN 201910758117 A CN201910758117 A CN 201910758117A CN 110357313 A CN110357313 A CN 110357313A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
- C02F2101/322—Volatile compounds, e.g. benzene
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
A kind of efficient absorption and filter method producing pure water, specific step is as follows: step 1: initial filter: untreated pure water is pumped by pressurization to initial filter device, untreated pure water is set to pass sequentially through the first strainer and the second strainer in initial filter device, fixation suspended matter and microorganism in pure water can be made to filter out, step 2: it flocculating setting: will be pumped into the pure water after initial filter into sedimentation basin by water pump, then flocculant is added into sedimentation basin, it is stirred 1-2 hours by agitating device, it is sufficiently mixed flocculant with pure water, it is then allowed to stand 3-8 hours, in the present invention, pass through initial filter, flocculating setting, thick absorption, under second adsorption and reverse osmosis collective effect, quickly and effectively light water can be made to be treated as pure water, substantially increase water treatment efficiency, efficient purpose is arrived, and then it reduces The production cost of enterprise, improves the economic benefit of enterprise.
Description
Technical field
The present invention relates to a kind of efficient absorptions and filter method for producing pure water, belong to water treatment field.
Background technique
Pure water refers to H free from foreign meter2O, abbreviation water purification or pure water, be it is pure, clean, do not contain impurity or bacterium
Water such as organic pollutant, inorganic salts, any additive and all kinds of impurity be the water to meet standards for drinking water quality
For raw water.It is made by electric dialyzator method, ion-exchanger method, hyperfiltration, the way of distillation and other processing methods appropriate
At, it is sealed in container, and be free of any additive, it is colorless and transparent, it is capable of direct drinking.
Absorption method (is referred to as adsorbed using certain in porous solid (referred to as adsorbent) absorption waste water or several pollutants
Matter), to recycle or remove certain pollutants, thus the method for being purified waste water.The operation of absorption method unit generally includes three
A step: being to contact waste water and solid absorbent first, the pollutant in waste water is adsorbed by adsorbent；Second step will be adsorbed with
The adsorbent of pollutant is separated with waste water；Finally carry out the regeneration or update of adsorbent.In the way of contact, separation, absorption behaviour
Work can be divided into static Batch Adsorption method and continuous two kinds of the absorption method of dynamic.
Reverse osmosis membrane is artificial semi-permeable membrane with certain characteristics made of a kind of simulation biological semi-permeable film, is reverse osmosis skill
The core component of art.Reverse osmosis technology principle is cannot to penetrate half according to other substances under the action of being higher than solution osmotic pressure
Permeable membrane and these substances and water are separated.The membrane aperture of reverse osmosis membrane is very small, therefore can be effectively removed in water
Dissolved salts, colloid, microorganism, organic matter etc..
In the production process of pure water, existing absorption and filter method are sufficiently complex, and inefficiency, are advising greatly
It needs to consume a large amount of cost in mould production process, is unfavorable for the operation of enterprise, while reducing the economic benefit of enterprise.
Summary of the invention
The present invention in view of the deficienciess of the prior art, provide a kind of efficient absorption and filter method for producing pure water,
To solve the problems, such as the absorption and filter method low efficiency of existing pure water.
The technical scheme to solve the above technical problems is that a kind of efficient absorption for producing pure water and filtering side
Method, the specific steps are as follows: step 1: initial filter: untreated pure water is pumped by pressurization to initial filter device, is made untreated
Pure water pass sequentially through the first strainer and the second strainer in initial filter device, fixation suspended matter and micro- life in pure water can be made
Object filters out；
Step 2: it flocculating setting: will be pumped into the pure water after initial filter into sedimentation basin by water pump, then to sedimentation basin
Middle addition flocculant is stirred 1-2 hours by agitating device, is sufficiently mixed flocculant with pure water, it is small to be then allowed to stand 3-8
When, so that impurity is deposited on deposition bottom of pond portion, by pure water cotton-shaped impurity or gel-like foreign matters filter out；
Step 3: it thick absorption: by the clear liquid at the top of water pump extraction sedimentary to thick adsorbent equipment, is set in thick adsorbent equipment
Be equipped with the first adsorbent, the first adsorbent in pure water a large amount of colors, smell, taste, agricultural chemical insecticide and most of organic matter have
Good adsorption effect；
Step 4: the pure water after thick absorption second adsorption: is extracted to second adsorption device, second adsorption by booster pump
The second adsorbent is provided in device, the second adsorbent is to small molecule polar organic matter, carbon tetrachloride and the benzene etc. in pure water
Nonpolar small organic molecule has good adsorption effect；
Step 5: reverse osmosis: reverse osmosis membrane to be provided in reverse osmosis unit, reverse osmosis membrane two sides are respectively arranged with higher-pressure region
And low-pressure area, higher-pressure region is pressurized by supercharging device, the pure water after second adsorption is extracted by booster pump to reverse osmosis
Higher-pressure region in saturating device, can filter out the metal ion in pure water by reverse osmosis membrane.
Preferably, the first strainer in the step 1 is impurity strainer, and second strainer is microorganism strainer.
Preferably, the flocculant in the step 2 is aluminum sulfate, aluminium chloride, ferrous sulfate hydrate, alum, ferric sulfate
With the one of which in iron chloride.
Preferably, the first adsorbent in the step 3 is acticarbon.
Preferably, the second adsorbent in the step 4 is zeolite molecular sieve.
Preferably, the reverse osmosis membrane in the step 5 is complex reverse osmosis membrane, the material of the complex reverse osmosis membrane basement membrane
Material is the one of which in polysulfones, polypropylene and polyacrylonitrile, and the material of the complex reverse osmosis membrane desalination layer is fragrant polyamides
Amine, piperazine amide, propylene-alkyl polyamide and condensation urea, furfuryl alcohol and trihydroxyethyl isocyanates, m-phenylene diamine (MPD) and equal benzene three
One or more of them combination in formyl chloride.
Preferably, the specific surface area of the zeolite molecular sieve is 1000-1200m2/g。
Preferably, the aperture of the complex reverse osmosis membrane is 0.0001 micron.
In conclusion the invention has the following advantages:
(1) in the present invention, by under initial filter, flocculating setting, thick absorption, second adsorption and reverse osmosis collective effect, energy
It is enough quickly and effectively light water to be made to be treated as pure water, water treatment efficiency is substantially increased, has arrived efficient purpose, and then drop
The production cost of Di Liao enterprise improves the economic benefit of enterprise.
(2) in the present invention, lead to the setting of acticarbon and time-consuming molecular sieve, it can be by the coloring in water body, peculiar smell
Organic matter effectively adsorbs, while can soften to water body, the ammonia nitrogen in water body is removed, to lead, cadmium, chromium, mercury, arsenic etc. to human body
The more serious heavy metal contaminants of toxic also have preferable treatment effect, to improve the effect of water process.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment one:
A kind of efficient absorption and filter method producing pure water, the specific steps are as follows: step 1: initial filter: will be untreated
Pure water be pumped by pressurization to initial filter device, make untreated pure water pass sequentially through in initial filter device the first strainer and
Second strainer, the first strainer are impurity strainer, and the second strainer is microorganism strainer, can make fixation suspended matter in pure water and
Microorganism filters out；
Step 2: it flocculating setting: will be pumped into the pure water after initial filter into sedimentation basin by water pump, then to sedimentation basin
Middle addition flocculant, flocculant are aluminum sulfate, are stirred 1.5 hours by agitating device, are sufficiently mixed flocculant with pure water,
Be then allowed to stand 4 hours, impurity made to be deposited on deposition bottom of pond portion, by pure water cotton-shaped impurity or gel-like foreign matters filter out；
Step 3: it thick absorption: by the clear liquid at the top of water pump extraction sedimentary to thick adsorbent equipment, is set in thick adsorbent equipment
Be equipped with the first adsorbent, the first adsorbent is acticarbon, the first adsorbent in pure water a large amount of colors, smell, taste, agriculture
Medicine insecticide and most of organic matter have good adsorption effect；
Step 4: the pure water after thick absorption second adsorption: is extracted to second adsorption device, second adsorption by booster pump
The second adsorbent is provided in device, the second adsorbent is zeolite molecular sieve, and the specific surface area of zeolite molecular sieve is 1000-
1200m2/ g, the second adsorbent is to nonpolar small molecules such as small molecule polar organic matter, carbon tetrachloride and benzene in pure water
Organic matter has good adsorption effect；
Step 5: reverse osmosis: reverse osmosis membrane to be provided in reverse osmosis unit, reverse osmosis membrane is complex reverse osmosis membrane, compound
The material of reverse osmosis membrane basement membrane is polysulfones, the material of complex reverse osmosis membrane desalination layer be aromatic polyamides and piperazine amide combination and
At the aperture of complex reverse osmosis membrane is 0.0001 micron, and reverse osmosis membrane two sides are respectively arranged with higher-pressure region and low-pressure area, pass through increasing
Pressure device is pressurized higher-pressure region, high pressure of the pure water after second adsorption is extracted by booster pump into reverse osmosis unit
Area can filter out the metal ion in pure water by reverse osmosis membrane.
Embodiment two: the difference between this embodiment and the first embodiment lies in:
A kind of efficient absorption and filter method producing pure water, the specific steps are as follows: step 1: initial filter: will be untreated
Pure water be pumped by pressurization to initial filter device, make untreated pure water pass sequentially through in initial filter device the first strainer and
Second strainer, the first strainer are impurity strainer, and the second strainer is microorganism strainer, can make fixation suspended matter in pure water and
Microorganism filters out；
Step 2: it flocculating setting: will be pumped into the pure water after initial filter into sedimentation basin by water pump, then to sedimentation basin
Middle addition flocculant, flocculant are aluminum sulfate, are stirred 1.3 hours by agitating device, are sufficiently mixed flocculant with pure water,
Be then allowed to stand 5 hours, impurity made to be deposited on deposition bottom of pond portion, by pure water cotton-shaped impurity or gel-like foreign matters filter out；
Step 3: it thick absorption: by the clear liquid at the top of water pump extraction sedimentary to thick adsorbent equipment, is set in thick adsorbent equipment
Be equipped with the first adsorbent, the first adsorbent is acticarbon, the first adsorbent in pure water a large amount of colors, smell, taste, agriculture
Medicine insecticide and most of organic matter have good adsorption effect；
Step 4: the pure water after thick absorption second adsorption: is extracted to second adsorption device, second adsorption by booster pump
The second adsorbent is provided in device, the second adsorbent is zeolite molecular sieve, and the specific surface area of zeolite molecular sieve is 1000-
1200m2/ g, the second adsorbent is to nonpolar small molecules such as small molecule polar organic matter, carbon tetrachloride and benzene in pure water
Organic matter has good adsorption effect；
Step 5: reverse osmosis: reverse osmosis membrane to be provided in reverse osmosis unit, reverse osmosis membrane is complex reverse osmosis membrane, compound
The material of reverse osmosis membrane basement membrane is polypropylene, and the material of complex reverse osmosis membrane desalination layer is that propylene-alkyl polyamide and condensation are urinated
Element and furfuryl alcohol are composed with trihydroxyethyl isocyanates, and the aperture of complex reverse osmosis membrane is 0.0001 micron, reverse osmosis membrane two
Side is respectively arranged with higher-pressure region and low-pressure area, is pressurized by supercharging device to higher-pressure region, extracts secondary suction by booster pump
Higher-pressure region of the attached pure water into reverse osmosis unit can filter the metal ion in pure water by reverse osmosis membrane
It removes.
Embodiment three: the present embodiment and the difference of embodiment one and embodiment two are:
A kind of efficient absorption and filter method producing pure water, the specific steps are as follows: step 1: initial filter: will be untreated
Pure water be pumped by pressurization to initial filter device, make untreated pure water pass sequentially through in initial filter device the first strainer and
Second strainer, the first strainer are impurity strainer, and the second strainer is microorganism strainer, can make fixation suspended matter in pure water and
Microorganism filters out；
Step 2: it flocculating setting: will be pumped into the pure water after initial filter into sedimentation basin by water pump, then to sedimentation basin
Middle addition flocculant, flocculant are aluminum sulfate, are stirred 1.6 hours by agitating device, are sufficiently mixed flocculant with pure water,
Be then allowed to stand 4.5 hours, impurity made to be deposited on deposition bottom of pond portion, by pure water cotton-shaped impurity or gel-like foreign matters filter out；
Step 3: it thick absorption: by the clear liquid at the top of water pump extraction sedimentary to thick adsorbent equipment, is set in thick adsorbent equipment
Be equipped with the first adsorbent, the first adsorbent is acticarbon, the first adsorbent in pure water a large amount of colors, smell, taste, agriculture
Medicine insecticide and most of organic matter have good adsorption effect；
Step 4: the pure water after thick absorption second adsorption: is extracted to second adsorption device, second adsorption by booster pump
The second adsorbent is provided in device, the second adsorbent is zeolite molecular sieve, and the specific surface area of zeolite molecular sieve is 1000-
1200m2/ g, the second adsorbent is to nonpolar small molecules such as small molecule polar organic matter, carbon tetrachloride and benzene in pure water
Organic matter has good adsorption effect；
Step 5: reverse osmosis: reverse osmosis membrane to be provided in reverse osmosis unit, reverse osmosis membrane is complex reverse osmosis membrane, compound
The material of reverse osmosis membrane basement membrane is polyacrylonitrile, the material of complex reverse osmosis membrane desalination layer be aromatic polyamides, m-phenylene diamine (MPD) and
It is composed in pyromellitic trimethylsilyl chloride, the aperture of complex reverse osmosis membrane is 0.0001 micron, and reverse osmosis membrane two sides are respectively arranged with
Higher-pressure region and low-pressure area are pressurized higher-pressure region by supercharging device, the pure water after second adsorption is extracted by booster pump
Higher-pressure region into reverse osmosis unit can filter out the metal ion in pure water by reverse osmosis membrane.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of efficient absorption and filter method for producing pure water, it is characterised in that: specific step is as follows: step 1: initial filter:
Untreated pure water is pumped by pressurization to initial filter device, untreated pure water is made to pass sequentially through in initial filter device the
One strainer and the second strainer can be such that fixation suspended matter and microorganism in pure water filters out；
Step 2: flocculating setting: it will be pumped into the pure water after initial filter into sedimentation basin by water pump, then be added into sedimentation basin
Enter flocculant, is stirred 1-2 hours by agitating device, be sufficiently mixed flocculant with pure water, be then allowed to stand 3-8 hours, make
Impurity is deposited on deposition bottom of pond portion, by pure water cotton-shaped impurity or gel-like foreign matters filter out；
Step 3: it thick absorption: by the clear liquid at the top of water pump extraction sedimentary to thick adsorbent equipment, is provided in thick adsorbent equipment
First adsorbent, the first adsorbent in pure water a large amount of colors, smell, taste, agricultural chemical insecticide and most of organic matter have well
Adsorption effect；
Step 4: the pure water after thick absorption second adsorption: is extracted to second adsorption device, second adsorption device by booster pump
In be provided with the second adsorbent, the second adsorbent is to non-poles such as small molecule polar organic matter, carbon tetrachloride and benzene in pure water
The small organic molecule of property has good adsorption effect；
Step 5: reverse osmosis: to be provided with reverse osmosis membrane in reverse osmosis unit, reverse osmosis membrane two sides are respectively arranged with higher-pressure region and low
Pressure area is pressurized higher-pressure region by supercharging device, the pure water after second adsorption is extracted by booster pump to reverse osmosis dress
Higher-pressure region in setting can filter out the metal ion in pure water by reverse osmosis membrane.
2. a kind of efficient absorption and filter method for producing pure water according to claim 1, it is characterised in that: the step
The first strainer in rapid one is impurity strainer, and second strainer is microorganism strainer.
3. a kind of efficient absorption and filter method for producing pure water according to claim 1, it is characterised in that: the step
Flocculant in rapid two is the one of which in aluminum sulfate, aluminium chloride, ferrous sulfate hydrate, alum, ferric sulfate and iron chloride.
4. a kind of efficient absorption and filter method for producing pure water according to claim 1, it is characterised in that: the step
The first adsorbent in rapid three is acticarbon.
5. a kind of efficient absorption and filter method for producing pure water according to claim 1, it is characterised in that: the step
The second adsorbent in rapid four is zeolite molecular sieve.
6. a kind of efficient absorption and filter method for producing pure water according to claim 1, it is characterised in that: the step
Reverse osmosis membrane in rapid five is complex reverse osmosis membrane, and the material of the complex reverse osmosis membrane basement membrane is polysulfones, polypropylene and poly- third
One of which in alkene nitrile, the material of the complex reverse osmosis membrane desalination layer are aromatic polyamides, piperazine amide, propylene-alkyl
Polyamide and condensation urea, furfuryl alcohol and one of which in trihydroxyethyl isocyanates, m-phenylene diamine (MPD) and pyromellitic trimethylsilyl chloride or
Multiple combinations.
7. a kind of efficient absorption and filter method for producing pure water according to claim 5, it is characterised in that: the boiling
The specific surface area of stone molecular sieve is 1000-1200 ㎡/g.
8. a kind of efficient absorption and filter method for producing pure water according to claim 6, it is characterised in that: described multiple
The aperture for closing reverse osmosis membrane is 0.0001 micron.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368861A (en) * | 2022-01-28 | 2022-04-19 | 江苏理文造纸有限公司 | Raw water pretreatment device and method |
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2019
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|---|---|---|---|---|
| KR20060013444A (en) * | 2006-01-24 | 2006-02-09 | 김정태 | The purifier with contain wastwater of the polychlorinated biphenyl |
| CN1935675A (en) * | 2006-09-05 | 2007-03-28 | 葫芦岛北方膜技术工业有限公司 | Drinking water emergency purifying process and its apparatus |
| CN106477823A (en) * | 2016-11-22 | 2017-03-08 | 安方 | Domestic water cyclic processing device |
| CN206204098U (en) * | 2016-11-28 | 2017-05-31 | 京天下文化产业发展（北京）有限公司 | A kind of health purified water processing unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368861A (en) * | 2022-01-28 | 2022-04-19 | 江苏理文造纸有限公司 | Raw water pretreatment device and method |
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Application publication date: 20191022 |