CN202865040U - Zero-release treatment system of external circulation cooling water for direct-current converter station - Google Patents
Zero-release treatment system of external circulation cooling water for direct-current converter station Download PDFInfo
- Publication number
- CN202865040U CN202865040U CN 201220558724 CN201220558724U CN202865040U CN 202865040 U CN202865040 U CN 202865040U CN 201220558724 CN201220558724 CN 201220558724 CN 201220558724 U CN201220558724 U CN 201220558724U CN 202865040 U CN202865040 U CN 202865040U
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- Prior art keywords
- water
- reverse osmosis
- stage reverse
- zero
- filtration
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- Expired - Lifetime
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- 239000000498 cooling water Substances 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 84
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 39
- 238000001471 micro-filtration Methods 0.000 claims abstract description 35
- 238000004140 cleaning Methods 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims abstract description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 208000028659 discharge Diseases 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000002455 scale inhibitor Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 238000005189 flocculation Methods 0.000 claims description 4
- 230000016615 flocculation Effects 0.000 claims description 4
- 230000002829 reductive effect Effects 0.000 claims description 4
- 238000011001 backwashing Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 2
- 230000000844 anti-bacterial effect Effects 0.000 abstract 1
- 239000003899 bactericide agent Substances 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 239000002674 ointment Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000002826 coolant Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical compound N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Abstract
The utility model provides a zero-release treatment system of external circulation cooling water for a direct-current converter station. Sewage water from a spray pool and make-up water from a water supply network are mixed with each other at a pipeline mixer to be transported into a seal-cleaning filter, and the discharged water of the seal-cleaning filter enters into a pipe type microfiltration water outlet box through a pipe type microfiltration device; the discharged water of the pipe type microfiltration water outlet box is transported into a first-stage reverse osmosis cartridge filter after the pressure of the discharged water is increased by a pipe type microfiltration water outlet lift pump, and is transported into a first-stage reverse osmosis device through the first-stage reverse osmosis cartridge filter after the pressure of the discharged water is increased by a first-stage reverse osmosis high pressure pump, and the discharged water of the first-stage reverse osmosis device is compensated into an external cooling spraying pool; a flocculant storing and adding device and a bactericide storing and adding device are arranged on a pipeline between the pipeline mixer and the seal-cleaning filter; and a hydrochloric acid storing and adding device, an antisludging agent adding device and a reducing agent adding device are arranged on a pipeline between the pipe type microfiltration water outlet box and the first-stage reverse osmosis cartridge filter. Compared with the existing treatment technology, the zero-release treatment system adopting the technical scheme can enable an external circulation cooling water system to run at 100 times of the concentration ratio, so that the zero-release unction can be achieved, and the zero-release treatment system is prominent in environmental friendliness and water-saving benefit.
Description
Technical field
The utility model relates to a kind of recirculated water technique of zero discharge, particularly relates to a kind of DC converter station with outer cooling circulating water zero-discharge treatment system.
Background technology
The silicon controlled rectifier converter valve is one of nucleus equipment of DC converter station, bears the AC-to-DC transition function in DC converter station, and heat radiation is vital.Water coolant (interior cooling circulating water system) in the valve that has carried out heat exchange with the converter valve thyristor and heated up must be through secondary cooling (outer cooling circulating water system), reduces to enter converter valve after the water temperature again and cool off, and forms circulation.Outer cooling circulating water system adopts closed evapourizing type cooling tower water-cooled mode to dispel the heat usually, along with cooling tower part spray evaporation of water, salt in the water coolant will be concentrated, simultaneously because the cleaning function of air, the content of the material such as suspended substance and colloid silicon in the water coolant will be increased, must strengthen blowdown or process, prevent that corrosion and scaling, microorganism viscosity mud and suspended substance etc. in the water coolant concentration process are on the impact of cooling performance.
Mostly without urban drainage pipe network, according to the requirement of environmental administration, should reduce the outer discharge capacity of water body in the station around the DC converter station as far as possible.Outer cooling circulating water system make up water all adopts city tap-water or Deep Underground water at present, after processing, simple filtration fills into outer chilling spray pond, circulating water system adopts and adds the Scale inhibitors processing, the circulating water system concentration rate is low, need efflux recirculated cooling water, can not satisfy the transformer substation construction requirement of " the friendly type of resource, environment saving type ".
Summary of the invention
The purpose of this utility model provides a kind of technical process weak point, equipment progression is few, quantity is few, the DC converter station that plant area takes up an area is less, investment is saved is with outer refrigeration cycle water technology, the recirculated water concentration rate can reach more than 10 times, realizes outer refrigeration cycle water zero discharge function.
For achieving the above object, the utility model is by the following technical solutions:
A kind of DC converter station is with outer cooling circulating water zero-discharge treatment system, spray pond sewer and water supply network make up water are sent into self-cleaning filter after line mixer mixes, enter the tubular type micro-filtration after the water outlet process tubular type micro-filtration of self-cleaning filter and go out water tank; Send into the first-stage reverse osmosis cartridge filter behind the pressure-raising of the water outlet that the tubular type micro-filtration goes out water tank through tubular type micro-filtration water outlet lift pump, the first-stage reverse osmosis cartridge filter enters the first-stage reverse osmosis device behind the pressure-raising again through the first-stage reverse osmosis high-pressure pump, and the water outlet of first-stage reverse osmosis device fills in the outer chilling spray pond; And the pipeline between line mixer and self-cleaning filter arranges flocculation agent storage and throwing device and sterilant and stores and throwing device; The pipeline that goes out between water tank and the first-stage reverse osmosis cartridge filter at the tubular type micro-filtration arranges hydrochloric acid storage and throwing device, scale inhibitor feeding device and reductive agent throwing device.
Described self-cleaning filter is stainless steel aperture strainer, and filtering accuracy is 500 μ m.
Described first-stage reverse osmosis filter core of security filter adopts the large flow foldable filter element of periodic replacement, and water intake mode is for withing too many people coming in and going out.
Described tubular type micro-filtration is supporting the automatic back-washing device.
Described tubular type micro-filtration and first-stage reverse osmosis device are all supporting a chemically-cleaning device.
Adopt the utility model of technique scheme, compare with existing treatment process, can realize that outer cooling circulating water system concentration rate up to 10 times of operations, reaches the zero release function, have significant environmental protection and water-saving benefit.Two systems merge setting, and system's inflow temperature is far below the Circulating water effluent water temp, with the operation work-ing life of Effective Raise self-cleaning filter, tubular type micro-filtration, reverse osmosis unit, stable effluent quality.
Description of drawings
Fig. 1 is system schematic of the present utility model.
Fig. 2 is tubular type micro-filtration floor map.
Embodiment
As shown in Figure 1 and Figure 2, a kind of DC converter station is with outer cooling circulating water zero-discharge treatment system, spray pond sewer and water supply network make up water are sent into self-cleaning filter 1 after line mixer 14 mixes, enter the tubular type micro-filtration after the water outlet process tubular type micro-filtration 2 of self-cleaning filter 1 and go out water tank 3; Send into first-stage reverse osmosis cartridge filter 5 behind the pressure-raising of the water outlet that the tubular type micro-filtration goes out water tank 3 through tubular type micro-filtration water outlet lift pump 4, first-stage reverse osmosis cartridge filter 5 enters first-stage reverse osmosis device 7 behind the pressure-raising again through first-stage reverse osmosis high- pressure pump 6, and 7 water outlets of first-stage reverse osmosis device fill in the outer chilling spray pond; And the pipeline between line mixer 14 and self-cleaning filter 1 arranges, and flocculation agent stores and throwing device 12 and sterilant storage and throwing device 13; The pipeline that goes out between water tank 3 and the first-stage reverse osmosis cartridge filter 5 at the tubular type micro-filtration arranges hydrochloric acid storage and throwing device 9, scale inhibitor feeding device 10 and reductive agent throwing device 11.
Principle of work of the present utility model is: the sewer after water supply network comes make up water and promotes through sewer boosting pump 8 is in 14 interior mixing of line mixer, store and throwing device 12 and after sterilant stores and throwing device 13 adds clorox and polymerization iron at flocculation agent, directly enter self-cleaning filter 1, remove major diameter floating matter and particulate matter; Self-cleaning filter 1 water outlet enters tubular type micro-filtration 2, at this diameter greater than the thalline of 0.2 μ m, virus, suspended solids etc. with separated, the 7 water inlet requirements of first-stage reverse osmosis device are satisfied in water outlet SDI＜4; 2 water outlets of tubular type micro-filtration enter the tubular type micro-filtration and go out water tank 3, improve pressure to the 0.2MPa through tubular type micro-filtration water outlet boosting pump 4, store with hydrochloric acid and hydrochloric acid, Scale inhibitors and sodium bisulfite hybrid reaction that throwing device 9, scale inhibitor feeding device 10, reductive agent throwing device 11 add after, entering first-stage reverse osmosis cartridge filter 5, diameter under the cartridge filter Accident prevention situation〉particulate matter of 5 μ m is to the damage of first-stage reverse osmosis device 7 membrane elements; First-stage reverse osmosis cartridge filter 5 enters first-stage reverse osmosis device 7 after first-stage reverse osmosis high-pressure pump 6 is promoted to 1.2-1.6MPa; 7 water outlets of first-stage reverse osmosis device fill into outer chilling spray pond, and system's ratio of desalinization can reach 98%, and system's water outlet conductivity can reach 10us/cm.
Above-mentioned self-cleaning filter 1 is stainless steel aperture strainer, and filtering accuracy is 500 μ m.Above-mentioned first-stage reverse osmosis cartridge filter 5 filter cores adopt the large flow foldable filter element of periodic replacement, and water intake mode is for withing too many people coming in and going out.
Tubular type micro-filtration 2 long 3800mm, putamina diameter 150mm, the long 3000mm of putamina, water inlet suspension content＜1000mg/L; Wherein the tubular membrane element is ultrahigh molecular weight polypropylene (PP) material, and the film internal diameter is 5.5mm, and membrane pore size is 0.2 μ m.And tubular type micro-filtration 2 is supporting an automatic back-washing device, and when tubular type micro-filtration 2 inlet outlet pressure differentials or delivery turbidity reached set(ting)value, system entered backwash procedure automatically.And tubular type micro-filtration 2 and first-stage reverse osmosis device 7 are all supporting a chemically-cleaning device, and when transmembrane pressure exceeded prescribed value, system prompt carried out matting.
Need to prove that the draining of self-cleaning filter 1, tubular type micro-filtration 2 and first-stage reverse osmosis device 7 enters treatment of sewage system of full factory, reuse after processing.
It is pointed out that concrete application mode of the present utility model is not limited to above-mentioned concrete description, every simple deformation of carrying out is on this basis used and all can be thought to drop within the utility model protection domain.
Claims (5)
1. a DC converter station is with outer cooling circulating water zero-discharge treatment system, it is characterized in that: spray pond sewer and water supply network make up water are sent into self-cleaning filter (1) after line mixer (14) mixes, and enter the tubular type micro-filtration after the water outlet process tubular type micro-filtration (2) of self-cleaning filter (1) and go out water tank (3); Send into first-stage reverse osmosis cartridge filter (5) behind the pressure-raising of the water outlet that the tubular type micro-filtration goes out water tank (3) through tubular type micro-filtration water outlet lift pump (4), first-stage reverse osmosis cartridge filter (5) enters first-stage reverse osmosis device (7) behind the pressure-raising again through first-stage reverse osmosis high-pressure pump (6), and first-stage reverse osmosis device (7) water outlet fills in the outer chilling spray pond; And the pipeline between line mixer (14) and self-cleaning filter (1) arranges, and flocculation agent stores and throwing device (12) and sterilant storage and throwing device (13); The pipeline that goes out between water tank (3) and the first-stage reverse osmosis cartridge filter (5) at the tubular type micro-filtration arranges hydrochloric acid storage and throwing device (9), scale inhibitor feeding device (10) and reductive agent throwing device (11).
2. DC converter station according to claim 1 is with outer cooling circulating water zero-discharge treatment system, and it is characterized in that: described self-cleaning filter (1) is stainless steel aperture strainer, and filtering accuracy is 500 μ m.
3. DC converter station according to claim 1 is characterized in that with outer cooling circulating water zero-discharge treatment system: described first-stage reverse osmosis cartridge filter (5) filter core adopts the large flow foldable filter element of periodic replacement, and water intake mode is for withing too many people coming in and going out.
4. DC converter station according to claim 1 is characterized in that with outer cooling circulating water zero-discharge treatment system: described tubular type micro-filtration (2) is supporting the automatic back-washing device.
5. DC converter station according to claim 1 is characterized in that with outer cooling circulating water zero-discharge treatment system: described tubular type micro-filtration (2) and first-stage reverse osmosis device (7) are all supporting a chemically-cleaning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558724 CN202865040U (en) | 2012-10-29 | 2012-10-29 | Zero-release treatment system of external circulation cooling water for direct-current converter station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558724 CN202865040U (en) | 2012-10-29 | 2012-10-29 | Zero-release treatment system of external circulation cooling water for direct-current converter station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202865040U true CN202865040U (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220558724 Expired - Lifetime CN202865040U (en) | 2012-10-29 | 2012-10-29 | Zero-release treatment system of external circulation cooling water for direct-current converter station |
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| CN (1) | CN202865040U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103224307A (en) * | 2013-04-28 | 2013-07-31 | 浙江晶泉水处理设备有限公司 | Continuous electro-adsorption process-based sea water desalination apparatus |
| CN103435197A (en) * | 2013-08-28 | 2013-12-11 | 湖南省湘电试验研究院有限公司 | Method and device for treating cooling water of convertor station |
| CN103613230A (en) * | 2013-08-28 | 2014-03-05 | 湖南省湘电试验研究院有限公司 | Purification treatment method and device for converter valve outer cooling water |
| CN104556524A (en) * | 2014-11-17 | 2015-04-29 | 苏州鑫泽雅节能设备有限公司 | Cold/hot water treatment device for closed system |
| CN105716442A (en) * | 2014-12-05 | 2016-06-29 | 中国石油化工股份有限公司 | Closed cooling tower and closed circulating water system |
| CN106007050A (en) * | 2016-05-23 | 2016-10-12 | 临涣焦化股份有限公司 | Circulating water source system of coke dry quenching workshop |
| CN110342672A (en) * | 2018-04-04 | 2019-10-18 | 中国石油天然气集团有限公司 | Purify the processing system and its processing method of recovered water |
-
2012
- 2012-10-29 CN CN 201220558724 patent/CN202865040U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103224307A (en) * | 2013-04-28 | 2013-07-31 | 浙江晶泉水处理设备有限公司 | Continuous electro-adsorption process-based sea water desalination apparatus |
| CN103224307B (en) * | 2013-04-28 | 2015-05-06 | 浙江晶泉水处理设备有限公司 | Continuous electro-adsorption process-based sea water desalination apparatus |
| CN103435197A (en) * | 2013-08-28 | 2013-12-11 | 湖南省湘电试验研究院有限公司 | Method and device for treating cooling water of convertor station |
| CN103613230A (en) * | 2013-08-28 | 2014-03-05 | 湖南省湘电试验研究院有限公司 | Purification treatment method and device for converter valve outer cooling water |
| CN103613230B (en) * | 2013-08-28 | 2014-12-03 | 湖南省湘电试验研究院有限公司 | Purification treatment method and device for converter valve outer cooling water |
| CN103435197B (en) * | 2013-08-28 | 2015-01-07 | 湖南省湘电试验研究院有限公司 | Method and device for treating cooling water of convertor station |
| CN104556524A (en) * | 2014-11-17 | 2015-04-29 | 苏州鑫泽雅节能设备有限公司 | Cold/hot water treatment device for closed system |
| CN105716442A (en) * | 2014-12-05 | 2016-06-29 | 中国石油化工股份有限公司 | Closed cooling tower and closed circulating water system |
| CN106007050A (en) * | 2016-05-23 | 2016-10-12 | 临涣焦化股份有限公司 | Circulating water source system of coke dry quenching workshop |
| CN110342672A (en) * | 2018-04-04 | 2019-10-18 | 中国石油天然气集团有限公司 | Purify the processing system and its processing method of recovered water |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| C56 | Change in the name or address of the patentee | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Shuxiang Inventor after: Zheng Chaoquan Inventor after: Gu Jianhui Inventor after: Han Yueru Inventor before: Wang Shuxiang Inventor before: Zheng Chaoquan Inventor before: Gu Jianhui Inventor before: Han Yueru |
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| CP01 | Change in the name or title of a patent holder |
Address after: High tech Zone Henan city Zhengzhou province 450001 bamboo Street No. 1 building 28 floor 4 No. 04 Patentee after: ZHENGZHOU HENGBO TECHNOLOGY Co.,Ltd. Address before: High tech Zone Henan city Zhengzhou province 450001 bamboo Street No. 1 building 28 floor 4 No. 04 Patentee before: ZHENGZHOU HENGBO TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Zero-release treatment system of external circulation cooling water for direct-current converter station Effective date of registration: 20141226 Granted publication date: 20130410 Pledgee: Bank of China Zhengzhou branch of Limited by Share Ltd. culture Pledgor: ZHENGZHOU HENGBO TECHNOLOGY Co.,Ltd. Registration number: 2014990001146 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20160201 Granted publication date: 20130410 Pledgee: Bank of China Zhengzhou branch of Limited by Share Ltd. culture Pledgor: ZHENGZHOU HENGBO TECHNOLOGY Co.,Ltd. Registration number: 2014990001146 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Zero-release treatment system of external circulation cooling water for direct-current converter station Effective date of registration: 20160201 Granted publication date: 20130410 Pledgee: Bank of China Zhengzhou branch of Limited by Share Ltd. culture Pledgor: ZHENGZHOU HENGBO TECHNOLOGY Co.,Ltd. Registration number: 2016990000088 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20180411 Granted publication date: 20130410 Pledgee: Bank of China Zhengzhou branch of Limited by Share Ltd. culture Pledgor: ZHENGZHOU HENGBO TECHNOLOGY Co.,Ltd. Registration number: 2016990000088 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Zero-release treatment system of external circulation cooling water for direct-current converter station Effective date of registration: 20180411 Granted publication date: 20130410 Pledgee: Bank of China Zhengzhou branch of Limited by Share Ltd. culture Pledgor: ZHENGZHOU HENGBO TECHNOLOGY Co.,Ltd. Registration number: 2018990000287 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| CP03 | Change of name, title or address |
Address after: 450001 building 12, 20 Peach Road, Zhengzhou high tech Zone, Henan Patentee after: ZHENGZHOU HENGBO ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Address before: 450001 No. 4, No. 28, 28 Cui Zhu street, Zhengzhou high tech Zone, Henan, China 04 Patentee before: ZHENGZHOU HENGBO TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
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| CX01 | Expiry of patent term |