CN105600967B - A kind of the domestic water cleaning equipment and method of suitable distributing rural households user - Google Patents
A kind of the domestic water cleaning equipment and method of suitable distributing rural households user Download PDFInfo
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- CN105600967B CN105600967B CN201610144221.5A CN201610144221A CN105600967B CN 105600967 B CN105600967 B CN 105600967B CN 201610144221 A CN201610144221 A CN 201610144221A CN 105600967 B CN105600967 B CN 105600967B
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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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
-
- 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
- C02F2101/103—Arsenic 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
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
-
- 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
- C02F2101/203—Iron or iron compound
-
- 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
- C02F2101/206—Manganese or manganese 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
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention discloses a kind of domestic water cleaning equipment of suitable distributing rural households user, including inhalant region, quartz sand filtration area, compound filtration with manganese sand area, activated alumina adsorption zone, Nanoscale Iron and aluminium hydroxide composite adsorption area, carbon fiber adsorption and catalytic combustion area, the storage area being sequentially connected in series；Water (flow) direction is bottom in and top out during the normal water purification operation in each area, connects and is equipped with check-valves on the water route in adjacent twoth area；Blow valve is mounted below quartz sand filtration area, compound filtration with manganese sand area, activated alumina adsorption zone, Nanoscale Iron and aluminium hydroxide composite adsorption area, carbon fiber adsorption and catalytic combustion area, top is mounted on backwash valve and inspection socket, water intake valve and discharging valve are installed below storage area, discharging valve connects backwashing pump, and backwashing pump is connect by pipeline with the backwash valve above each area.The present invention can effectively remove the substances such as iron exceeded in underground water source, manganese, fluorine, arsenic, nitrate, organic matter, can fully meet the water demand of rural households user.
Description
Technical field
The invention belongs to technical field of water purification more particularly to a kind of domestic water of suitable distributing rural households user are net
Change device and method.
Background technology
Water is Source of life, and drinking water is that human survival and development obtains primary demand.Safe and reliable rural potable water is straight
The physical and mental health and quality of life for being related to rural resident are connect, is related to and builds a well-off society in an all-round way and new socialist countryside mesh
Target is realized.However, as the contaminated phenomenon aggravation in rural area water source, cause closely related with water pollution in China's people in the countryside
Malignant tumour it is in rising trend.Most of country residents are in distributing, and no image of Buddha town users are provided using water treatment plant
Domestic water.With the raising of life in the countryside level, many rural subscribers have changed traditional water use model, currently the majority agriculture
What family of village used gets to roof storage cistern using water pump by phreatic water, then recycles flow by gravity to using water spot.And
Due to being polluted by various pollution of area source and other factors, phreatic water is extremely difficult to existing the vast rural areas《It is raw
Sanitary standard for drinking water living》(GB5749-2006) requirement, therefore it is badly in need of a kind of water purification of suitable distributing rural households user
Equipment meets distributing countryside domestic water demand.
Water purifier is developed mainly for town users currently on the market, not too much rural households is suitble to use, while to each
Kind of water source adaptability is not strong, and rural households user needs a kind of purifier of broad spectrum type, to iron exceeded in underground water source,
The substances such as manganese, fluorine, arsenic, nitrate, organic matter can effectively remove.
Invention content
For overcome the deficiencies in the prior art, the purpose of the present invention is to provide one kind for rural groundwater there may be
Organic matter, inorganic matter, heavy metal pollution equivalent risk, with reference to the suitable distributing rural area of the water demand of distributing rural households
The domestic water cleaning equipment and method of domestic consumer
In order to achieve the above objectives, the present invention is achieved by the following technical solutions.
A kind of domestic water cleaning equipment of suitable distributing rural households user, including inhalant region, the stone being sequentially connected in series
Sand filtering area, compound filtration with manganese sand area, activated alumina adsorption zone, Nanoscale Iron and aluminium hydroxide composite adsorption area, activated carbon
Fibers adsorption area, storage area；Quartz sand filtration area, compound filtration with manganese sand area, activated alumina adsorption zone, Nanoscale Iron and hydroxide
Blow valve is mounted below aluminium composite adsorption area, carbon fiber adsorption and catalytic combustion area, each area is mounted on inspection socket, storage area lower section
Water intake valve is installed；Quartz sand is loaded in quartz sand filtration area, and compound manganese sand, activated alumina absorption are loaded by compound filtration with manganese sand area
Activated alumina, Nanoscale Iron and aluminium hydroxide composite adsorption area filling Nanoscale Iron load in area and aluminium hydroxide, activated carbon fibre are inhaled
Load activated carbon fibre in attached area.
Further integral device is Horizontal cylinder shape storage tank, is divided into 7 pieces of regions with 6 pieces of risers, one end end socket be into
Pool, storage tank stage casing are divided into quartz sand filtration area, compound filtration with manganese sand area, activated alumina adsorption zone, nanometer for clean water area
Iron and aluminium hydroxide composite adsorption area, carbon fiber adsorption and catalytic combustion area, other end end socket are storage area, and clean water area bottom is equipped with lateral aperture
Plate is provided with hole along first and third, five piece of bottom of the riser of water (flow) direction, is provided with hole at the top of second, four, six piece of riser, tank bottom is equipped with
Bearing.The device structure compact outer is beautiful, is easily worked, is placed in rural households' user's roof, facilitates installation and safe and reliable.
Purge valve further is installed in the storage area lower part, is connect by pipeline with cleaning pump intake, cleaning pump
Outlet connection check-valves, check-valves is connect by pipeline with each area bottom blow valve respectively, between check-valves and blow valve
Discharging valve is installed on pipeline.Increased cleaning equipment can extend the service life of each filler.
Further the ratio of the Nanoscale Iron and aluminium hydroxide is volume ratio 1:1.
A kind of further method of the domestic water purification of suitable distributing rural households user will be needed during water purification net
The water of change is put in inhalant region, and flow is controlled by quartz sand filtration area, hydraulic detention time at 20 minutes to 30 minutes；Then
Flow is controlled by compound filtration with manganese sand area, hydraulic detention time at 20 minutes to 30 minutes；Then flow passes through active oxidation
Aluminium adsorption zone, hydraulic detention time are controlled at 20 minutes to 30 minutes；Then flow passes through Nanoscale Iron and the compound suction of aluminium hydroxide
Attached area, hydraulic detention time are controlled at 20 minutes to 30 minutes；Then flow is by carbon fiber adsorption and catalytic combustion area, during hydraulic retention
Between control at 20 minutes to 30 minutes；Last flow flows into storage area.
Further equipment needs to clean after operation a period of time：Each area bottom blow valve and storage area purge valve are opened,
Start cleaning pump, cleaning pump is closed after cleaning, open discharging valve, water is emptied, be then shut off each area bottom blow valve, storage
Pool purge valve, discharging valve reenter water purification process.
Advantageous effect：Compared with prior art, the advantage of the invention is that：
1) present invention can effectively remove the substances such as iron exceeded in underground water source, manganese, fluorine, arsenic, nitrate, organic matter
It removes, can fully meet the water demand of rural households user；
2) device uses integral structure, and by each functional areas preferred arrangement in a horizontal reactor, function distribution is closed
Reason, equipment is beautiful and generous, is suitble to rural households user demands, facilitates installation and safe and reliable；
3) easy to use, operation is simple, and service life is long.
Description of the drawings
The structural diagrams that Fig. 1 is the present invention are intended to；
Wherein 1. inhalant regions, 2. quartz sand filtration areas, 3. compound filtration with manganese sand areas, 4. activated alumina adsorption zones, 5. receive
Rice iron and aluminium hydroxide composite adsorption area, 6. carbon fiber adsorption and catalytic combustion areas, 7. storage areas, 8. cleaning pumps, 9. water intake valves, 10. put
Water valve, 11. check-valves, 12. blow valves, 13. purge valves.
Specific embodiment
With reference to example, the present invention is described in further detail.
Quartz sand, compound manganese sand, activated alumina, activated carbon fibre is commercial product.
Nanoscale Iron is the iron powder of Nano Particle, and can make by oneself to purchase at present on the market.Nanoscale Iron and hydrogen-oxygen
The ratio for changing aluminium is volume ratio 1:1.
Embodiment 1
As shown in Figure 1, a kind of domestic water cleaning equipment of suitable distributing rural households user, integral device is horizontal
Cylindrical oil tank is divided into 7 pieces of regions with 6 pieces of risers, and one end end socket is inhalant region 1, and storage tank stage casing is divided into for clean water area
Quartz sand filtration area 2, compound filtration with manganese sand area 3, activated alumina adsorption zone 4, Nanoscale Iron and aluminium hydroxide composite adsorption area 5,
Carbon fiber adsorption and catalytic combustion area 6, other end end socket be storage area 7, clean water area bottom be equipped with horizontal orifice plate, along water (flow) direction first,
3rd, five pieces of bottom of the riser are provided with hole, and hole is provided at the top of second, four, six piece of riser, and tank bottom is equipped with bearing；Quartz sand filtration
Quartz sand is loaded in area 2, and quartz sand can remove suspended particulate substance in water removal, and compound manganese sand, compound manganese load in compound filtration with manganese sand area 3
Sand can remove iron, manganese substance present in water removal, and activated alumina adsorption zone 4 loads activated alumina, and activated alumina can be with
The fluorine in water removal is removed, Nanoscale Iron and aluminium hydroxide, Nanoscale Iron and aluminium hydroxide load in Nanoscale Iron and aluminium hydroxide composite adsorption area 5
Ratio be volume ratio 1:1, Nanoscale Iron and aluminium hydroxide can go to the arsenic and nitrate in water removal, carbon fiber adsorption and catalytic combustion area 6
Activated carbon fibre is loaded, activated carbon fibre can remove remaining organic matter in water removal；Quartz sand filtration area 2, compound filtration with manganese sand
Area 3, activated alumina adsorption zone 4, Nanoscale Iron and aluminium hydroxide composite adsorption area 5,6 lower section of carbon fiber adsorption and catalytic combustion area are respectively mounted
There is blow valve 12, each area is mounted on inspection socket, and 7 lower section of storage area is equipped with water intake valve 9；It is equipped with clearly in 7 lower part of storage area
Valve 13 is washed, is connect by pipeline with 8 entrance of cleaning pump, the outlet of cleaning pump 8 connection check-valves 11, check-valves 11 is distinguished by pipeline
It is connect with each area bottom blow valve 12, discharging valve 10 is installed on the pipeline between check-valves 11 and blow valve 12.
During normal work (production water), underground raw water squeezes into inhalant region 1 by elevator pump；Then underground water is in a manner of upward flow
By quartz sand filtration area 2, hydraulic detention time control is 30 minutes, and suspension in water removal can be gone in quartz sand filtration area 2
Grain object；Then enter compound filtration with manganese sand area 3 to stream mode below underground water, hydraulic detention time control is 30 minutes, multiple
Iron, manganese substance present in water removal can be removed by closing filtration with manganese sand area 3；Then underground water passes through activated alumina in a manner of upward flow
Adsorption zone 4, hydraulic detention time control are 30 minutes, and the fluorine in water removal can be removed in activated alumina adsorption zone 4；Then underground
Under water to stream mode by Nanoscale Iron and aluminium hydroxide composite adsorption area 5, hydraulic detention time control is 30 minutes, in Nanoscale Iron
And aluminium hydroxide composite adsorption area 5 can remove the arsenic and nitrate in water removal；Then underground water passes through activity in a manner of upward flow
Carbon fibe adsorption zone 6, hydraulic detention time control is 30 minutes, can be gone in carbon fiber adsorption and catalytic combustion area 6 remaining in water removal
Organic matter；Purified water enters storage area 7, then is transported to and uses water spot.During normal work (production water), each functional areas lower part row
Empty valve is turned off, and cleaning pump 8 is in stop working state；After a cycle (30~360 days) are run, each area bottom is opened
7 purge valve 13 of portion's blow valve 12 and storage area starts cleaning pump 8, and the Shui Duige areas that cleaning pump 8 extracts storage area 7 are cleaned,
Filler achievees the purpose that regenerate and lengthen the life under the cleaning disturbance of flow, and after cleaning, cleaning pump 8 is stopped, and opens discharging valve
10, water is emptied, is then shut off each area bottom blow valve 12,7 purge valve 13 of storage area, discharging valve 10, is then entered back into normal
Work (production water).
Embodiment 2
It is substantially the same manner as Example 1, except that：The 2 hydraulic detention time control of quartz sand filtration area is 20 minutes；It is multiple
It is 20 minutes to close the 3 hydraulic detention time control of filtration with manganese sand area；The control of 4 hydraulic detention time of activated alumina adsorption zone is 20 points
Clock；Nanoscale Iron and the control of 5 hydraulic detention time of aluminium hydroxide composite adsorption area are 20 minutes；6 waterpower of carbon fiber adsorption and catalytic combustion area
Residence time control is 20 minutes.
By using the present invention purifier and method, can effectively remove iron exceeded in underground water source, manganese, fluorine, arsenic,
The substances such as nitrate, organic matter, fully meet the water demand of rural households user, and specific testing result is shown in Table 1.
Table 1 is compared using the water quality before and after water purification of the present invention
The present invention is illustrated according to above-described embodiment, it should be understood that above-described embodiment does not limit this in any form
Invention, all technical solutions obtained using equivalent substitution or equivalent transformation mode are within the scope of the present invention.
Claims (6)
1. a kind of domestic water cleaning equipment of suitable distributing rural households user, which is characterized in that including what is be sequentially connected in series
Inhalant region, quartz sand filtration area, compound filtration with manganese sand area, activated alumina adsorption zone, Nanoscale Iron and aluminium hydroxide composite adsorption
Area, carbon fiber adsorption and catalytic combustion area, storage area；Quartz sand filtration area, compound filtration with manganese sand area, activated alumina adsorption zone, nanometer
Blow valve is mounted below iron and aluminium hydroxide composite adsorption area, carbon fiber adsorption and catalytic combustion area, each area is mounted on inspection socket,
Water intake valve is installed below storage area；Quartz sand is loaded in quartz sand filtration area, and compound manganese sand, activity are loaded by compound filtration with manganese sand area
Activated alumina, Nanoscale Iron and aluminium hydroxide composite adsorption area filling Nanoscale Iron and aluminium hydroxide load in alumina adsorption area, living
Property Carbon fibe adsorption zone filling activated carbon fibre.
2. the domestic water cleaning equipment of suitable distributing rural households user according to claim 1 a kind of, feature
It is, integral device is Horizontal cylinder shape storage tank, is divided into 7 pieces of regions with 6 pieces of risers, and one end end socket is inhalant region, in storage tank
Section is divided into quartz sand filtration area, compound filtration with manganese sand area, activated alumina adsorption zone, Nanoscale Iron and hydroxide for clean water area
Aluminium composite adsorption area, carbon fiber adsorption and catalytic combustion area, other end end socket are storage area, and clean water area bottom is equipped with horizontal orifice plate, along water
Stream first and third, five piece of direction bottom of the riser is provided with hole, and hole is provided at the top of second, four, six piece of riser, and tank bottom is equipped with bearing.
3. the domestic water cleaning equipment of suitable distributing rural households user according to claim 1 a kind of, feature
It is, further includes cleaning pump, purge valve is installed in the storage area lower part, is connect by pipeline with the cleaning pump intake,
Pump discharge connection check-valves is cleaned, check-valves is connect by pipeline with each area bottom blow valve respectively, in check-valves and blow valve
Between pipeline on discharging valve is installed.
4. the domestic water cleaning equipment of suitable distributing rural households user according to claim 1 a kind of, feature
It is, the ratio of the Nanoscale Iron and aluminium hydroxide is volume ratio 1:1.
5. the domestic water using a kind of suitable distributing rural households user described in any one of claims 1 to 33 purifies
The method that equipment is purified, which is characterized in that the water for needing to purify is put in inhalant region during water purification, flow passes through quartz sand
Filtering area, hydraulic detention time are controlled at 20 minutes to 30 minutes；Then flow is by compound filtration with manganese sand area, during hydraulic retention
Between control at 20 minutes to 30 minutes；Then flow is controlled by activated alumina adsorption zone, hydraulic detention time at 20 minutes
To 30 minutes；Then flow is controlled by Nanoscale Iron and aluminium hydroxide composite adsorption area, hydraulic detention time at 20 minutes to 30
Minute；Then flow is controlled by carbon fiber adsorption and catalytic combustion area, hydraulic detention time at 20 minutes to 30 minutes；Last flow stream
Enter storage area.
6. the domestic water cleaning equipment of suitable distributing rural households user according to claim 5 a kind of is purified
Method, which is characterized in that equipment operation a period of time after need to clean：Open each area bottom blow valve and storage area cleaning
Valve starts cleaning pump, and cleaning pump is closed after cleaning, opens discharging valve, water is emptied, and is then shut off each area bottom emptying
Valve, storage area purge valve, discharging valve, reenter water purification process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144221.5A CN105600967B (en) | 2016-03-14 | 2016-03-14 | A kind of the domestic water cleaning equipment and method of suitable distributing rural households user |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610144221.5A CN105600967B (en) | 2016-03-14 | 2016-03-14 | A kind of the domestic water cleaning equipment and method of suitable distributing rural households user |
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| Publication Number | Publication Date |
|---|---|
| CN105600967A CN105600967A (en) | 2016-05-25 |
| CN105600967B true CN105600967B (en) | 2018-06-29 |
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| CN201610144221.5A Active CN105600967B (en) | 2016-03-14 | 2016-03-14 | A kind of the domestic water cleaning equipment and method of suitable distributing rural households user |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114933376B (en) * | 2022-06-10 | 2024-03-29 | 西安建筑科技大学 | Water treatment device and method for underground water containing trivalent arsenic or trivalent antimony |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200949082Y (en) * | 2006-08-19 | 2007-09-19 | 杨建明 | Water purifier |
| JP2008055374A (en) * | 2006-09-01 | 2008-03-13 | Hisami Fujiyama | Water cleaner |
| CN101229504A (en) * | 2007-07-05 | 2008-07-30 | 中国科学院生态环境研究中心 | Preparing and applications of ferric oxide-alumina compound nanophase defluoridation material |
| CN201454180U (en) * | 2009-03-18 | 2010-05-12 | 陈光明 | Filter for removing arsenic and fluorine |
| CN201473400U (en) * | 2009-09-01 | 2010-05-19 | 罗娟 | Filter used by group and for removing arsenic, fluoride, iron and manganese |
| CN102083754A (en) * | 2008-07-09 | 2011-06-01 | Pur水纯化产品公司 | Multi-stage water filters |
| CN202270395U (en) * | 2011-09-29 | 2012-06-13 | 林志信 | Water filtering kettle |
-
2016
- 2016-03-14 CN CN201610144221.5A patent/CN105600967B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200949082Y (en) * | 2006-08-19 | 2007-09-19 | 杨建明 | Water purifier |
| JP2008055374A (en) * | 2006-09-01 | 2008-03-13 | Hisami Fujiyama | Water cleaner |
| CN101229504A (en) * | 2007-07-05 | 2008-07-30 | 中国科学院生态环境研究中心 | Preparing and applications of ferric oxide-alumina compound nanophase defluoridation material |
| CN102083754A (en) * | 2008-07-09 | 2011-06-01 | Pur水纯化产品公司 | Multi-stage water filters |
| CN201454180U (en) * | 2009-03-18 | 2010-05-12 | 陈光明 | Filter for removing arsenic and fluorine |
| CN201473400U (en) * | 2009-09-01 | 2010-05-19 | 罗娟 | Filter used by group and for removing arsenic, fluoride, iron and manganese |
| CN202270395U (en) * | 2011-09-29 | 2012-06-13 | 林志信 | Water filtering kettle |
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| CN105600967A (en) | 2016-05-25 |
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Address after: 317000 Taizhou, Zhejiang Province, East Road, No. 605 Applicant after: Taizhou University Applicant after: Jiang Shengtao Address before: No. 1139 Taizhou City, Zhejiang province Jiaojiang City Road 318000 Applicant before: Taizhou University Applicant before: Jiang Shengtao |
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