CN201358206Y - Integral equipment for sludge thickening and dehydrating - Google Patents
Integral equipment for sludge thickening and dehydrating Download PDFInfo
- Publication number
- CN201358206Y CN201358206Y CNU2009200668027U CN200920066802U CN201358206Y CN 201358206 Y CN201358206 Y CN 201358206Y CN U2009200668027 U CNU2009200668027 U CN U2009200668027U CN 200920066802 U CN200920066802 U CN 200920066802U CN 201358206 Y CN201358206 Y CN 201358206Y
- Authority
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- China
- Prior art keywords
- sludge
- strainer
- mud
- integration apparatus
- sludge concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 47
- 230000008719 thickening Effects 0.000 title abstract description 4
- 230000018044 dehydration Effects 0.000 claims abstract description 38
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000005484 gravity Effects 0.000 claims abstract description 21
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 230000010354 integration Effects 0.000 claims description 21
- 239000004744 fabric Substances 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003756 stirring Methods 0.000 abstract 5
- 208000005156 Dehydration Diseases 0.000 abstract 1
- 239000003814 drug Substances 0.000 abstract 1
- 238000005189 flocculation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000016615 flocculation Effects 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000009183 running Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Images
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- Filtration Of Liquid (AREA)
- Treatment Of Sludge (AREA)
Abstract
The utility model discloses integral equipment for sludge thickening and dehydrating, which comprises a sludge mixing and feeding device, a rotation-advancement gravity dehydrating device, a filtering and pressing device and a sludge cake outlet, wherein the sludge mixing and feeding device comprises a sludge stirring tank and a sludge conveying pipe which are mounted on a frame; a sludge inlet and a medicine inlet are formed on the sludge stirring tank; a stirring blade driven by a motor is arranged in the sludge stirring tank; the sludge conveying pipe is connected with the upper part of the sludge stirring tank; the rotation-advancement gravity dehydrating device comprises a screen drum, a drainage pipeline and a lower water collecting tank; the screen drum is connected with the motor; the filtering and pressing device comprises an upper filter belt, a lower filter belt and a plurality of dehydrating rollers; the upper and the lower filter belts are controlled by the motor; a wedge-shaped area is formed between the filter belts; and the dehydrating rollers are distributed between the upper and the lower filter belts and are in the shape of S. The integral equipment with simple operation, stable performance and a high automation degree is the ideal equipment for sludge dehydration treatment.
Description
Technical field
The utility model relates to a kind of sludge concentration and dewatering integration apparatus, belongs to the environmental protecting device field.
Background technology
Since the nineties, China's municipal sewage treatment cause has obtained developing rapidly, according to incompletely statistics, seat surplus the existing municipal sewage plant 200 of a 999 China in the end of the year still has 100 municipal sewage plant's under construction construction or carries out the previous work of project at present.Just in operating municipal sewage plant, will produce surplus in the of about 1,000 ten thousand tons mud (water ratio is about 96%) every day, for the mud that produces, if effectively do not handle and dispose, still pollute the environment, the function of sewage work can not be brought into play fully.
In order to address the above problem, domestic sewage work has developed different treatment facilities with the individual, as: Patent document number 03111093.2, name is called the utility model patent of sludge concentration and dewatering device, a casing of forming by two water shutoff plates, two overflow plates, a spreader plate and a stabilier etc., at the top of casing is dismountable sealing cover, and the bottom of casing has the taper bucket of escape orifice.The import of mud is located at the bottom of casing one side, the overflow and going out respectively of mud after the concentrating and separating and clear water.This device internal structure is simple, and volume is little, without power wheel drive also no-rotary part, also can reach certain dehydrating effect, the thickening of lower concentration mud in satisfying.But present device for dehydrating sladge waste major part all adopts single treatment facility, and is together single integrated as simple belt filter press, whizzer, vacuum machine, board and frame machine etc., so this kind equipment treatment capacity is little, the energy consumption height, and dehydration rate is also had a greatly reduced quality.Therefore, the integrated dehydration thickening equipment of developing a kind of simple and effective just seems very necessary.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of sludge concentration and dewatering integration apparatus, by rotating propelling gravity dehydration device and filtering pressing device the mud through chemical flocculation is rotated propelling gravity dehydration and extrusion dehydration, thereby makes the water ratio of mud drop to minimum and the formation mud cake.
The technical solution of the utility model is: a kind of sludge concentration and dewatering integration apparatus comprises that mud mixing and feeding device, rotation advance the gravity dehydration device, filter pressing device and mud cake outlet;
I), described mud mixes and feeding device, comprises being arranged on mud agitated pool and sludge carrier pipe on the frame that described mud agitated pool is provided with mud inlet, feeding opening, is provided with the agitating vane by driven by motor in the mud agitated pool; Described sludge carrier pipe is connected with the top of mud agitated pool;
Ii), described rotation advances the gravity dehydration device, comprises screen cloth rotating cylinder, drainage pipeline and lower curtate water leg, described screen cloth rotating cylinder is connected with motor;
Iii), described filtration pressing device, comprise strainer, lower filter belt and some dehydration cylinders, described upper and lower strainer is by electric machine control, between form a wedge area; Described dehydration cylinder is S-shaped to be distributed between strainer and the lower filter belt.
The beneficial effects of the utility model are:
1, this equipment advances the dehydration of gravity dehydration device and two processes of filtration pressing device by rotation, can make the water ratio of mud after treatment reduce and form mud cake greatly being come out by press filtration as much as possible through free-water, interstitial water in the mud of chemical flocculation.
But 2, this equipment continuous production, energy consumption is low, and treatment capacity is big, the level of automation height, stable performance, maintenance rate is low, and is easy to operate, easy care, easily maintenance is the ideal equipment of sludge dewatering treatment.
3, this equipment be applicable to papermaking, oil refining, chemical industry, beverage, paint, metal processing, mechanical workout, leather, weaving, food, butcher, print and dye, various industry and municipal sludge treatment project such as municipal administration.
Description of drawings
The utility model is described in more detail below in conjunction with accompanying drawing:
Fig. 1 is a kind of sludge concentration and dewatering integration apparatus front view;
Fig. 2 is the left view of sludge concentration and dewatering integration apparatus;
Fig. 3 is the vertical view of sludge concentration and dewatering integration apparatus;
Fig. 4 is the front view that rotation advances gravity dehydration device 7;
Fig. 5 is the left view that rotation advances gravity dehydration device 7;
Fig. 6 is tightening device and cylinder automatic regulating device gas circuit control chart;
Fig. 7 is the front view of strainer washing unit 29;
Fig. 8 is the vertical view of strainer washing unit 29.
Embodiment
Referring to figs. 1 to shown in Figure 4, a kind of sludge concentration and dewatering integration apparatus, described equipment comprise mud mixing and feeding device, rotation propelling gravity dehydration device 7, filter pressing device and mud cake outlet 15;
Described mud mixes and feeding device, comprises being arranged on mud agitated pool 3 and sludge carrier pipe 6 on the frame 31, and described mud agitated pool 3 is provided with mud inlet 1, feeding opening 2, is provided with the agitating vane 5 that is driven by motor 4 in the mud agitated pool 3; The top of described sludge carrier pipe 6 and mud agitated pool 3 is connected; Described frame 31 is preferably made with stainless steel.
Described rotation advances gravity dehydration device 7, comprises screen cloth rotating cylinder 9, drainage pipeline 10 and lower curtate water leg 11, and described screen cloth rotating cylinder 9 is by motor 8 controls; The mud that comes out from sludge carrier pipe 6 is delivered directly to rotation propelling gravity dehydration device 7, when motor 8 runnings drive 9 rotations of screen cloth rotating cylinder a large amount of free-waters is deviate from as much as possible, free-water advances gravity dehydration device drainage pipeline 10 directly to be discharged to lower curtate water leg 11 through rotation simultaneously.
Described filtration pressing device comprises strainer 12, lower filter belt 14 and some dehydration cylinders 32, described dehydration cylinder 32 S-shaped being distributed between strainer 12 and the lower filter belt 14.Under the control of motor 13, the operation in the same way simultaneously of last strainer 12 and lower filter belt 14, advance the dehydration of gravity dehydration device 7 through rotation after, the mud that water ratio is low falls after the processing of screen cloth rotating cylinder 9 at last strainer 12, drive along with last strainer 12, mud drops then on lower filter belt 14, until in the wedge type zone that last lower filter belt forms.Enter the S shape zone by 32 one-tenth of cylinder structures then, under the effect of strainer tension force, mud is subjected to holds extruding, forms certain pressure gradient between strainer and the dehydration cylinder 32, makes mud be subjected to becoming big expressing process gradually by pressure, and its stroke is a S shape.Be clamped in up and down the squeeze that the mud between two strainers is subjected to increasing step by step and the effect of shearing force, make the free-water of mud, interstitial water be come out by press filtration as much as possible, directly arrive mud cake at last and export 15.
For mud cake is come off, specially export 15 places and be provided with dumping device at mud cake, described dumping device is made up of knife rest 16, takeoff apron 17 and back-moving spring 18, and the quantity of knife rest 16, takeoff apron 17 and back-moving spring 18 is two.
After mud becomes cake, better make sludge dewatering for making next time, the side of specially going up lower filter belt is provided with strainer washing unit 29 respectively, and described strainer washing unit 29 is provided with filter cloth washing pipe 26, and preferably the body refuse of mud cake is rinsed out by the water strong pressure of 30 li of flushing pipes.
In conjunction with Fig. 1, in order to make the lower filter belt rate of tension suitable, preferably one tightening device is set in last lower filter belt one termination, this device is meant the tightening pulley 20 by cylinder 19 controls; In conjunction with Fig. 6, in order better to control the pressure of cylinder, the preferred relief valve 21 of installing on gas piping.
By shown in Figure 1, in sludge dewatering simultaneously, in order to prevent the strainer sideslip, be provided with cylinder automatic regulating device on described on the strainer 12 by cylinder 23 and cylinder 25 controls.Cylinder one end is fixed with cylinder, has certain stroke, runs into when going up filter cloth sideslip switch 22 when last strainer 12 sideslips, and cylinder 23 discharges the gas in the cylinder at once, makes the sideslip strainer slowly adjust to the equilibrium theory of tide, recovers certain pressure in the cylinder simultaneously.In like manner, lower filter belt 14 centring device forms are identical, and when the lower filter belt sideslip was run into down filter cloth sideslip switch 24, this moment, the cylinder 25 of lower filter belt sideslip discharged gas in the cylinder at once, made the sideslip strainer slowly adjust to the equilibrium theory of tide, recovered certain pressure in the cylinder simultaneously.Fig. 6 is tightening device and cylinder automatic regulating device gas circuit control chart;
The described strainer tension force of going up strainer 12 and lower filter belt 14 preferably is controlled at 50N-78N/cm.Cycloidal-pin wheel and electromagnetic adjustable speed motor associating speed governing are adopted in the transmission of strainer.Carry out the Artificial Control speed belt speed of travel and be 1-10 rice/minute, usual dispatch be generally 2-3 rice/minute.
Mix firm stainless steel frame 31 by above structure, formed a kind of sludge concentration and dewatering integration apparatus physical construction that makes.Integral part is equipped with automatically controlled again, has just formed the sludge concentration and dewatering integration apparatus of controllable diversification.
The dehydration working process of sludge concentration and dewatering integration apparatus can be divided into flocculation, rotation advances gravity dehydration, transition dehydration, four primary processes of filter-press dehydration.
The mud flocculation process: after the thorough mixing, flocculation agent coheres the solid phase particles in the mud in stirred pot for spissated mud of process and certain density flocculation agent, produces coacervation, makes solid phase and liquid phase separation.
Rotation advances gravity dehydration: flocculation mud later arrives rotation through sludge carrier pipe 6 and advances gravity dehydration device 7, in 9 rotations of screen cloth rotating cylinder how a large amount of free-waters may be deviate from.
Excessive dehydration: mud is distributed on the strainer after advancing gravity dehydration through rotation, drops to again subsequently on the lower filter belt, in the process with the strainer operation, leans on gravity that remaining free-water is deviate from as much as possible.
The filter-press dehydration process: the S shape of dehydration cylinder is furnished with and is beneficial to the water that press filtration comes out and flows out smoothly, be clamped in up and down mud between two strainers and be subjected to the squeeze that increases step by step and the effect of shearing force in the filter-press dehydration district repeatedly, make the free-water of mud, interstitial water be come out by press filtration as much as possible.
In sum, the utility model is can make moisture percentage in sewage sludge drop to minimum and form the integrated machine equipment of a kind of simple and effective of mud cake, has the advantage of more efficient grade than existing single type water extracter on the market.
Claims (10)
1, a kind of sludge concentration and dewatering integration apparatus is characterized in that: described equipment comprises mud mixing and feeding device, rotation propelling gravity dehydration device, filters pressing device and mud cake outlet (15);
I), described mud mixes and feeding device, comprise that being arranged on frame (31) goes up mud agitated pool (3) and sludge carrier pipe (6), described mud agitated pool (3) is provided with mud inlet (1), feeding opening (2), is provided with the agitating vane (5) that is driven by motor (4) in the mud agitated pool (3); Described sludge carrier pipe (6) is connected with the top of mud agitated pool (3);
Ii), described rotation advances gravity dehydration device (7), comprises screen cloth rotating cylinder (9), drainage pipeline (10) and lower curtate water leg (11), described screen cloth rotating cylinder (9) is connected with motor (8);
Iii), described filtration pressing device, comprise strainer (12), lower filter belt (14) and some dehydration cylinders (32), described upper and lower strainer (12,14) is by motor (13) control, formation one wedge area between the last lower filter belt; Described dehydration cylinder (32) is S-shaped to be distributed between strainer (12) and the lower filter belt (14).
2, sludge concentration and dewatering integration apparatus according to claim 1 is characterized in that: described mud cake outlet (15) locates to be provided with dumping device, and described dumping device is made up of knife rest (16), takeoff apron (17) and back-moving spring (18).
3, sludge concentration and dewatering integration apparatus according to claim 2 is characterized in that: the quantity of described (16), takeoff apron (17) and back-moving spring (18) is two.
4, sludge concentration and dewatering integration apparatus according to claim 1 and 2 is characterized in that: the side of described upper and lower strainer (12,14) is provided with strainer washing unit (29).
5, sludge concentration and dewatering integration apparatus according to claim 1 and 2, it is characterized in that: described equipment is provided with tightening device, and described tightening device is meant the same end that is separately positioned on strainer (12) and lower filter belt (14) and the tightening pulley of being controlled by cylinder (19) (20) is arranged.
6, sludge concentration and dewatering integration apparatus according to claim 5 is characterized in that: described tightening device also comprises relief valve (21).
7, sludge concentration and dewatering integration apparatus according to claim 1 and 2 is characterized in that: the described strainer (12) of going up is provided with the cylinder automatic regulating device of being controlled by cylinder (23) and cylinder (25).
8, sludge concentration and dewatering integration apparatus according to claim 7 is characterized in that: described cylinder automatic regulating device is for being arranged on the last filter cloth sideslip switch (22) on the strainer (12) and being arranged on following filter cloth sideslip switch (24) on the lower filter belt (14).
9, sludge concentration and dewatering integration apparatus according to claim 1 is characterized in that: the described strainer tension control of strainer (12) and lower filter belt (14) that goes up is at 50N-78N/cm.
10, sludge concentration and dewatering integration apparatus according to claim 1 is characterized in that: described frame (31) is made by stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200668027U CN201358206Y (en) | 2009-01-13 | 2009-01-13 | Integral equipment for sludge thickening and dehydrating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200668027U CN201358206Y (en) | 2009-01-13 | 2009-01-13 | Integral equipment for sludge thickening and dehydrating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201358206Y true CN201358206Y (en) | 2009-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200668027U Expired - Lifetime CN201358206Y (en) | 2009-01-13 | 2009-01-13 | Integral equipment for sludge thickening and dehydrating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201358206Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913751A (en) * | 2010-07-14 | 2010-12-15 | 江苏江达生态科技有限公司 | Slurry dehydration combined system |
| CN102002878A (en) * | 2010-10-21 | 2011-04-06 | 广东理文造纸有限公司 | Method for recovering slurry from papermaking sewage |
| CN102198424A (en) * | 2011-04-29 | 2011-09-28 | 成都源蓉科技有限公司 | Non-contact magnetic spinning apparatus |
| CN102600624A (en) * | 2012-03-26 | 2012-07-25 | 江苏沙家浜化工设备有限公司 | Efficient energy-saving continuous concentrating device |
| CN103055579A (en) * | 2011-10-21 | 2013-04-24 | 曹健 | Sand separating and concentrating-dewatering system for building mortar |
| CN103936255A (en) * | 2014-04-11 | 2014-07-23 | 赵建寅 | Mud separation equipment |
| CN105457987A (en) * | 2015-12-25 | 2016-04-06 | 安徽继宏环保科技有限公司 | Solid-liquid separator of town domestic rubbish disposal system |
| CN105881955A (en) * | 2014-10-11 | 2016-08-24 | 四川可士可果业股份有限公司 | Belt-type orange peel dreg dehydrator |
| CN107473563A (en) * | 2017-09-13 | 2017-12-15 | 宜兴市建华成套环保有限公司 | A kind of belt filter press |
| CN112794609A (en) * | 2020-12-31 | 2021-05-14 | 天津工程机械研究院有限公司 | Belt type dewatering machine and working method |
| CN112851069A (en) * | 2020-12-31 | 2021-05-28 | 天津工程机械研究院有限公司 | Belt type concentration and dehydration integrated machine and working method |
-
2009
- 2009-01-13 CN CNU2009200668027U patent/CN201358206Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101913751B (en) * | 2010-07-14 | 2012-04-18 | 江苏江达生态科技有限公司 | Slurry dehydration combined system |
| CN101913751A (en) * | 2010-07-14 | 2010-12-15 | 江苏江达生态科技有限公司 | Slurry dehydration combined system |
| CN102002878A (en) * | 2010-10-21 | 2011-04-06 | 广东理文造纸有限公司 | Method for recovering slurry from papermaking sewage |
| CN102198424A (en) * | 2011-04-29 | 2011-09-28 | 成都源蓉科技有限公司 | Non-contact magnetic spinning apparatus |
| CN102198424B (en) * | 2011-04-29 | 2013-02-06 | 成都源蓉科技有限公司 | Non-contact magnetic spinning device |
| CN103055579B (en) * | 2011-10-21 | 2014-12-24 | 佛山市雅斤环保科技有限公司 | Sand separating and concentrating-dewatering system for building mortar |
| CN103055579A (en) * | 2011-10-21 | 2013-04-24 | 曹健 | Sand separating and concentrating-dewatering system for building mortar |
| CN102600624A (en) * | 2012-03-26 | 2012-07-25 | 江苏沙家浜化工设备有限公司 | Efficient energy-saving continuous concentrating device |
| CN102600624B (en) * | 2012-03-26 | 2013-12-11 | 江苏沙家浜化工设备有限公司 | Efficient energy-saving continuous concentrating device |
| CN103936255A (en) * | 2014-04-11 | 2014-07-23 | 赵建寅 | Mud separation equipment |
| CN103936255B (en) * | 2014-04-11 | 2015-08-12 | 赵建寅 | mud separating device |
| CN105881955A (en) * | 2014-10-11 | 2016-08-24 | 四川可士可果业股份有限公司 | Belt-type orange peel dreg dehydrator |
| CN105457987A (en) * | 2015-12-25 | 2016-04-06 | 安徽继宏环保科技有限公司 | Solid-liquid separator of town domestic rubbish disposal system |
| CN107473563A (en) * | 2017-09-13 | 2017-12-15 | 宜兴市建华成套环保有限公司 | A kind of belt filter press |
| CN112794609A (en) * | 2020-12-31 | 2021-05-14 | 天津工程机械研究院有限公司 | Belt type dewatering machine and working method |
| CN112851069A (en) * | 2020-12-31 | 2021-05-28 | 天津工程机械研究院有限公司 | Belt type concentration and dehydration integrated machine and working method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI OZNER PURE WATER TECHNOLOGY DEVELOPMENT C Free format text: FORMER OWNER: KANGFUTE ENVIRONMENT SCIENCE AND TECHNOLOGY CO., LTD., SHANGHAI Effective date: 20131118 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131118 Address after: 201209, room 4, building 635, 101 min Lu, Pudong New Area, Shanghai Patentee after: Shanghai Ozer Water Purification Technology and Development Co., Ltd. Address before: 201209 Shanghai city Pudong New Area Sichuan Road No. 1549 Patentee before: Shanghai Kangfute Environment & Science Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091209 |
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| CX01 | Expiry of patent term |