CN102285736B - Reverse osmosis pre-treatment method for recycling reclaimed water in electric power plant - Google Patents
Reverse osmosis pre-treatment method for recycling reclaimed water in electric power plant Download PDFInfo
- Publication number
- CN102285736B CN102285736B CN 201110163911 CN201110163911A CN102285736B CN 102285736 B CN102285736 B CN 102285736B CN 201110163911 CN201110163911 CN 201110163911 CN 201110163911 A CN201110163911 A CN 201110163911A CN 102285736 B CN102285736 B CN 102285736B
- Authority
- CN
- China
- Prior art keywords
- water
- reverse osmosis
- value
- filter
- hardness
- 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.)
- Active
Links
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
本发明公开了一种中水回用于电厂时的反渗透预处理方法，包括以下步骤：1）中水混凝澄清；2）变孔隙滤池过滤；3）多介质过滤器过滤；4）强阳型钠离子交换器软化；5）双室弱酸、强酸阳离子交换器软化；6）pH值调整；其优点在于：将中水在反渗透之前进行预处理，大大降低中水中的硬度、COD、SiO2等造成反渗透结垢和污堵的风险，延长反渗透膜元件使用寿命，改善电厂反渗透运行的稳定性。
The invention discloses a method for reverse osmosis pretreatment when reclaimed water is reused in a power plant, comprising the following steps: 1) coagulation and clarification of reclaimed water; 2) filtering with a variable pore filter; 3) filtering with a multi-media filter; 4) Strong positive sodium ion exchanger for softening; 5) double-chamber weak acid and strong acid cation exchanger for softening; 6) pH value adjustment; its advantages are: the reclaimed water is pretreated before reverse osmosis, which greatly reduces the hardness and COD of reclaimed water , SiO2 , etc. cause the risk of reverse osmosis scaling and fouling, prolong the service life of reverse osmosis membrane elements, and improve the stability of reverse osmosis operation in power plants.
Description
Technical field
The present invention relates to a kind of pretreatment process of middle water before reverse osmosis that can recycle that is applied in the power plant, particularly the reverse osmosis pretreatment process of water when being back to power plant in a kind of.
Background technology
Middle water reuse is the effective way that solves the Water of Power Plant shortage of resources, also is the essential condition of the new enlarging of power plant.Municipal middle water water-quality constituents complexity, the saltiness in the water, COD, SiO
2, every index such as ammonia nitrogen, turbidity and colourity all has at double increase than natural water, and contain production and a large amount of tensio-active agent of the discharging of living, when it is back to reverse-osmosis treated, very easily cause reverse osmosis dirty stifled, cause reverse osmosis declines of exerting oneself, cycle of operation shortening, frequent matting, the power station water supply deficiency can make the reverse-osmosis membrane element lost of life when serious, has influenced the stable of power plant's reverse osmosis operation greatly.
At present, in the power plant of water reuse, mostly adopt ultrafiltration as the reverse osmosis pretreatment technology in the employing, ultrafiltration is taken up an area of bigger, the investment cost height, and at this complicated water body of middle water, although ultrafiltration is down to claimed range with feed water by reverse osmosis SDI value, but ultrafiltration is relatively poor to the removal effect of the organism in the water and microorganism, ultrafiltration and the reverse osmosis dirty stifled situation in succession that often occurs in service, reverse osmosis water production rate occurs and descends, and pressure reduction rises, degradation situation under the ratio of desalinization, operation stability is affected.
Summary of the invention
Technical problem to be solved by this invention provide a kind of in the reverse osmosis pretreatment process of water when being back to power plant, water is to the dirty stifled risk of reverse osmosis in can effectively reducing, prolong the reverse osmosis cycle of operation, reduce the matting frequency, improve the reverse osmosis operation stability; Effectively improve the Waste water utilization rate, make that the reverse osmosis rate of recovery is the highest can to reach 95%, saved great lot of water resources.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the reverse osmosis pretreatment process when water is back to power plant in a kind of, and it may further comprise the steps:
1) water coagulation clarification in; In water input mechanical stirring accelerating purifying pool in pending, adding unslaked lime, bodied ferric sulfate, polyacrylamide in the settling pond carries out coagulation clarification and handles, wherein unslaked lime adds dose and reaches 0.1-0.3mmol/L for making the water outlet hydroxide radical, it is 10-40mg/L that bodied ferric sulfate adds dose, and it is 0.3-2.0mg/L that polyacrylamide adds dose; Water hardness and basicity in the mensuration if hardness value specific alkalinity value is big, and when surpassing 3mmol/L, adds yellow soda ash in the system and make the difference of hardness value and basicity value less than 1mmol/L;
2) become the hole filter; To filter in the input of the water after coagulation clarification the is handled change hole filter tank;
3) more medium filter filters; To filter in the water input more medium filter after becoming the hole filter, wherein more medium filter adopts hard coal and quartz sand as filler, the SDI value of the water after filtering through more medium filter is ultimate value 6.7, the water of 20%-50% after then will filtering through more medium filter is sent in the ultrafiltration, the ultrafiltration water outlet mixes back input clean water basin with the water outlet of residue more medium filter, when water outlet SDI value less than ultimate value 6.7, the water after then will filtering through more medium filter directly be imported clean water basin;
4) strong positive type Na-ion exchanger is softening; Water in the clean water basin is delivered to strong positive type Na-ion exchanger, make Na-ion exchanger go out the water hardness and be lower than 1.5mmol/L;
5) two chamber weak acid, strongly-acid cation exchanger are softening; Water after strong positive type Na-ion exchanger is handled is introduced two chambers weak acid, strongly-acid cation exchanger, weak acid resin and strong resin volume ratio in the described pair of chamber weak acid, the strongly-acid cation exchanger are 4:1-5:1, and two chambers weak acid, strongly-acid cation exchanger go out the water hardness and be lower than 10 μ mol/L;
6) the pH value is adjusted; To through adding NaOH or KOH in the water after two chambers weak acid, the strongly-acid cation exchanger processing, make reverse osmosis concentrated water pH value be 9.0-9.5.
The beneficial effect that adopts technique scheme to produce is: the middle water that is back in power plant's heat supply network and the circulating water system is necessary through reverse-osmosis treated before drawing-in system, and does not pass through saltiness, COD, the SiO of pretreated middle water in early stage
2, every index such as ammonia nitrogen, turbidity and colourity all has at double increase than natural water, in reverse osmosis process, be very easy to cause dirty stifled, cause reverse osmosis power to descend, pressure reduction rises, the normal life cycle of reverse-osmosis membrane element shortens, and carries out matting continually, the power station water supply deficiency, can make the reverse-osmosis membrane element lost of life when serious, influence the stable of power plant's reverse osmosis operation greatly; The present invention is by carrying out pre-treatment with middle water before reverse osmosis, hardness, COD, SiO in reducing greatly in the water
2Deng causing reverse osmosis fouling and dirty stifled risk, prolong reverse-osmosis membrane element work-ing life, improve the stability of power plant's reverse osmosis operation.
Description of drawings
Fig. 1 is schema of the present invention.
Further the present invention is described in detail below in conjunction with accompanying drawing.
Embodiment
Reverse osmosis pretreatment process when a kind of middle water as shown in Figure 1 is back to power plant is characterized in that, may further comprise the steps:
1) water coagulation clarification in; In water input mechanical stirring accelerating purifying pool in pending, adding unslaked lime, bodied ferric sulfate, polyacrylamide in the settling pond carries out coagulation clarification and handles, wherein unslaked lime adds dose and reaches 0.1-0.3mmol/L for making the water outlet hydroxide radical, it is 10-40mg/L that bodied ferric sulfate adds dose, and it is 0.3-2.0mg/L that polyacrylamide adds dose; Water hardness and basicity in the mensuration if hardness value specific alkalinity value is big, and when surpassing 3mmol/L, adds yellow soda ash in the system and make the difference of hardness value and basicity value less than 1mmol/L;
2) become the hole filter; To filter in the input of the water after settling pond the is handled change hole filter tank;
3) more medium filter filters; To filter in the water input more medium filter after becoming the hole filter, wherein more medium filter adopts hard coal and quartz sand as filler, if the SDI value through the water after the more medium filter filtration is ultimate value 6.7, the water of 20%-50% after then will filtering through more medium filter is sent in the ultrafiltration, the ultrafiltration water outlet mixes back input clean water basin with the more medium filter water outlet, if the water after water outlet SDI value less than ultimate value 6.7, then will be filtered through more medium filter is directly imported clean water basin;
4) strong positive type Na-ion exchanger is softening; Water in the clean water basin is delivered to strong positive type Na-ion exchanger, make Na-ion exchanger go out the water hardness and be lower than 1.5mmol/L;
5) two chamber weak acid, strongly-acid cation exchanger are softening; Water after strong positive type Na-ion exchanger is handled is introduced two chambers weak acid, strongly-acid cation exchanger, weak acid resin and strong resin volume ratio in the described pair of chamber weak acid, the strongly-acid cation exchanger are 4:1-5:1, and two chambers weak acid, strongly-acid cation exchanger go out the water hardness and be lower than 10 μ mol/L;
6) the pH value is adjusted; To through adding NaOH or KOH in the water after two chambers weak acid, the strongly-acid cation exchanger processing, make reverse osmosis concentrated water pH value be 9.0-9.5.
In concrete application process, at first pending middle water is carried out coagulation clarification, be introduced in the mechanical stirring accelerating purifying pool, accelerator is to utilize machinery water to be promoted and stirring, impel the body refuse circulation, and solid impurity and established body refuse contact flocculation and the pond of precipitation separation in the water in making, the effect of this step is that the solid impurity in the centering water removes, and can prevent effectively that solid impurity from influencing the normal operation of subsequent processing device; When removing solid impurity, also in accelerator, add unslaked lime, bodied ferric sulfate, polyacrylamide and sodium sulfate centering water mix softening, unslaked lime, bodied ferric sulfate, the basicity of water and the relation between the hardness are determined in the add-on basis of polyacrylamide and sodium sulfate, central water hardness value specific alkalinity value is big, and when surpassing 3mmol/L, unslaked lime adds dose and reaches 0.1-0.3mmol/L for making the water outlet hydroxide radical, it is 10-40mg/L that bodied ferric sulfate adds dose, it is 0.3-2.0mg/L that polyacrylamide adds dose, and the add-on of yellow soda ash is to make the difference of middle water hardness value and basicity value be lower than 1mmol/L; If the difference between middle water hardness value and the basicity value during less than 1mmol/L, only needs to add unslaked lime, bodied ferric sulfate and polyacrylamide, add-on is the add-on during greater than basicity value 3mmol/L with hardness value; Central water is through coagulation clarification, and correlation parameter reaches after the requirement, be introduced into to become in the hole filter tank and filter, become the hole filter tank and adopt a kind of filter bed that mixes by a certain percentage than the bigger filtrate of normally used particle diameter of filter medium and another kind of particulate filtrate, become the particle diameter of filter medium and the shared ratio that adopt in the hole filter tank and differ bigger, what mainly used in change hole filter tank is coarse media, it relies on whole filtering layer to filter, avoided general filter chamber to form the surface filtration of filtering layer like this, reduced the filtering layer resistance, also avoid penetrating too early of suspended particle, can also improve filtering velocity; The adding of fine filtering material and in filtering layer mixing greatly reduced the local porosity of coarse media, improved the throwing out of fine particle in the sewage, more be conducive to the removal to fine particle, also greatly improved the retaining power in filter tank, the solid impurity in its role is to further remove in the water; The middle water that comes out from become the hole filter tank is directly introduced more medium filter and is filtered, more medium filter adopts hard coal and quartz sand as filler, quartz sand can effectively be removed the suspended substance in the water, and pollutents such as the colloid in the water, iron, organism, agricultural chemicals, manganese, bacterium, virus are had tangible removal effect.It has filtration resistance little, specific surface area is big, resistance to acids and bases is strong, and resistance to oxidation, the pH scope of application are 2-13, advantages such as resistance to crocking is good, the distinct advantages of quartz sand is also to have realized the self-adapting operation of strainer by optimizing the design of filtrate and strainer that filtrate has very strong adaptivity to influent density, operational condition, pretreatment technology etc., namely filter bed forms automatically and dredges close state down when filtering, and is conducive to guarantee under various operational conditionss effluent quality; Hard coal has solid particulate hold facility preferably, the effect that can improve suspended particle removing ability more medium filter reliably is to remove impurity in the sewage, absorption wet goods, the requirement that water quality is met recycle, the effect of filtering, mainly be suspension or the colloidal state impurity of removing in the water, particularly can remove fine particle that precipitation technology can not remove and bacterium etc. effectively, BOD5 and COD etc. also has certain removal effect.
In the standard that has been tending towards gradually through the middle water after the more medium filter filtration can be recycled, but the middle water hardness still can cause reverse osmosis generation fouling, so be introduced into the strong positive Na-ion exchanger reduce in water hardness, the middle water hardness of handling through the strong positive Na-ion exchanger is lower than 1.5mmol/L; The middle water that hardness is lower than 1.5mmol/L is introduced two chambers weak acid, strongly-acid cation exchanger, two chambers weak acid, strongly-acid cation exchanger is that anion-cation exchange resin is seated in the same ion-exchanger by a certain percentage, utilize the bigger exchange capacity of weak acid positive resin remove in the water inlet whole temporarily not firmly, the remaining strong acid sun resin that relies on is firmly forever on a small quantity removed, this design can effectively increase the cycle of operation of second stage softening agent, and in regenerative process, utilize strong acid sun regeneration of resin spent solution regeneration weak acid positive resin can improve the regenerated liquid utilization ratio, two chambers weak acid among the present invention, weak acid resin in the strongly-acid cation exchanger and strong resin volume ratio are 4:1-5:1, the middle water hardness of handling through cation exchanger is lower than 10 μ mol/L, can satisfy the hardness requirement of feed water by reverse osmosis fully, under the situation that does not add Scale inhibitors, reverse osmosis the calcium magne-scale can not occur yet, in order to reduce COD and SiO
2Influence to reverse osmosis, in the middle water of handling through cation exchanger, add NaOH or KOH, making reverse osmosis concentrated water pH value be 9.0-9.5, is that the middle water of 9.0-9.5 directly carries out reverse-osmosis treated at last with the pH value, and the water after the reverse-osmosis treated is as the moisturizing of power plant's water of productive use.
Claims (1)
1. the reverse osmosis pretreatment process when water is back to power plant in a kind is characterized in that, may further comprise the steps:
1) water coagulation clarification in; In water input mechanical stirring accelerating purifying pool in pending, adding unslaked lime, bodied ferric sulfate, polyacrylamide in the mechanical stirring accelerating purifying pool carries out coagulation clarification and handles, wherein unslaked lime adds dose and reaches 0.1-0.3mmol/L for making the water outlet hydroxide radical, it is 10-40mg/L that bodied ferric sulfate adds dose, and it is 0.3-2.0mg/L that polyacrylamide adds dose; Water hardness and basicity in the mensuration if hardness value specific alkalinity value is big, and when surpassing 3mmol/L, adds yellow soda ash in the system and make the difference of hardness value and basicity value less than 1mmol/L;
2) become the hole filter; To filter in the middle water input change hole filter tank after coagulation clarification is handled;
3) more medium filter filters; To filter in the water input more medium filter after becoming the hole filter, wherein more medium filter adopts hard coal and quartz sand as filler, the SDI value of the water after filtering through more medium filter is ultimate value 6.7, the water of 20%-50% after then will filtering through more medium filter is sent in the ultrafiltration, and the ultrafiltration water outlet mixes back input clean water basin with remaining more medium filter water outlet; When water outlet SDI value less than ultimate value 6.7, the water after then will filtering through more medium filter directly be imported clean water basin;
4) strong positive type Na-ion exchanger is softening; Water pump in the clean water basin is delivered to strong positive type Na-ion exchanger, make Na-ion exchanger go out the water hardness and be lower than 1.5mmol/L;
5) two chamber weak acid, strongly-acid cation exchanger are softening; Water after strong positive type Na-ion exchanger is handled is introduced two chambers weak acid, strongly-acid cation exchanger, weak acid resin and strong resin volume ratio in the described pair of chamber weak acid, the strongly-acid cation exchanger are 4:1-5:1, and two chambers weak acid, strongly-acid cation exchanger go out the water hardness and be lower than 10 μ mol/L;
6) the pH value is adjusted; To through adding NaOH or KOH in the water after two chambers weak acid, the strongly-acid cation exchanger processing, make reverse osmosis concentrated water pH value be 9.0-9.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110163911 CN102285736B (en) | 2011-06-17 | 2011-06-17 | Reverse osmosis pre-treatment method for recycling reclaimed water in electric power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110163911 CN102285736B (en) | 2011-06-17 | 2011-06-17 | Reverse osmosis pre-treatment method for recycling reclaimed water in electric power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102285736A CN102285736A (en) | 2011-12-21 |
| CN102285736B true CN102285736B (en) | 2013-08-28 |
Family
ID=45332523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110163911 Active CN102285736B (en) | 2011-06-17 | 2011-06-17 | Reverse osmosis pre-treatment method for recycling reclaimed water in electric power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102285736B (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058421B (en) * | 2013-01-25 | 2015-11-25 | 河北省电力建设调整试验所 | A kind of Reuse of Wastewater Form Circulating Cooling Water is in the treatment process of power plant |
| CN103041711A (en) * | 2013-01-25 | 2013-04-17 | 河北省电力建设调整试验所 | Non-destructive method for reverse osmosis system dirt block |
| CN104211204B (en) * | 2013-06-03 | 2016-03-30 | 北京朗新明环保科技有限公司 | High salt industrial waste water treatment process system |
| CN103539288B (en) * | 2013-10-31 | 2015-07-08 | 神华集团有限责任公司 | Industrial wastewater recovery method and wastewater recovery system |
| CN104030498B (en) * | 2014-05-21 | 2016-08-24 | 国家电网公司 | A kind of electric power plant circulating water parallel seismic method method |
| CN104030483A (en) * | 2014-05-21 | 2014-09-10 | 国家电网公司 | Treatment method for recycling power plant circulating water sewage |
| CN104891708A (en) * | 2015-05-29 | 2015-09-09 | 北京科泰兴达高新技术有限公司 | Thermal power plant oriented recycled water advanced treatment method |
| CN105293803A (en) * | 2015-11-06 | 2016-02-03 | 北京沃特尔水技术股份有限公司 | Treatment method of high-concentration waste water |
| CN105540913A (en) * | 2015-12-04 | 2016-05-04 | 河北省电力建设调整试验所 | Pretreatment method of thermal power plant desulfurized wastewater before evaporation crystallization |
| CN105399260B (en) * | 2015-12-11 | 2018-09-21 | 国网河北能源技术服务有限公司 | A kind of power plant condensation crystal processing regenerative wastewater process for reclaiming |
| CN110745980B (en) * | 2018-07-23 | 2022-03-01 | 中国石油天然气股份有限公司 | Shale gas fracturing flowback fluid pretreatment process and system |
| CN109133433B (en) * | 2018-10-17 | 2020-10-30 | 清华大学 | A kind of organic fouling control method of reverse osmosis membrane |
| CN109264896A (en) * | 2018-11-21 | 2019-01-25 | 大唐环境产业集团股份有限公司 | A kind of desalination water pretreatment preparation system |
| CN110845047A (en) * | 2019-12-13 | 2020-02-28 | 深圳市能源环保有限公司 | Reclaimed water softening and recycling treatment system and method suitable for waste incineration power plant |
| CN111018247A (en) * | 2019-12-20 | 2020-04-17 | 上海巴安水务股份有限公司 | Zero release processing system of chemical industry waste water |
| CN112744948A (en) * | 2020-12-15 | 2021-05-04 | 安徽金禾实业股份有限公司 | Pure water preparation method |
| CN112551784B (en) * | 2020-12-28 | 2022-01-04 | 华夏碧水环保科技有限公司 | A reclaimed water reuse device for desulfurization treatment in a power plant |
| CN114195206B (en) * | 2021-12-08 | 2023-01-20 | 珠海格力电器股份有限公司 | Water purifier and water outlet taste adjusting method thereof |
| CN114573143A (en) * | 2022-03-14 | 2022-06-03 | 四川贝特格林环保科技有限公司 | Mixing station wastewater purification treatment method |
| CN115159731A (en) * | 2022-07-13 | 2022-10-11 | 徐州水处理研究所 | Protective application method of reverse osmosis membrane by adopting alkali hardness-reducing adsorption bed |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040262206A1 (en) * | 2003-06-27 | 2004-12-30 | Doug Gettman | Mobile field electrical supply, freshwater and saltwater purification system, powder wash, wash station, and water collection and reclamation apparatus |
| US20050016906A1 (en) * | 2003-06-27 | 2005-01-27 | Doug Gettman | Mobile field electrical supply, water purification system, wash system, water collection, reclamation, and telecommunication apparatus |
| US7815804B2 (en) * | 2006-12-12 | 2010-10-19 | Otv Sa S.A. | Method for treating wastewater or produced water |
| US7520993B1 (en) * | 2007-12-06 | 2009-04-21 | Water & Power Technologies, Inc. | Water treatment process for oilfield produced water |
| CN201458865U (en) * | 2009-06-15 | 2010-05-12 | 北京中联动力技术有限责任公司 | High recovery rate reverse osmosis membrane water treatment system |
| CN201864636U (en) * | 2010-11-10 | 2011-06-15 | 董金奎 | Recycling treatment device system of circulating water of power plant |
| CN102070266A (en) * | 2010-12-03 | 2011-05-25 | 浙江丰川电子科技有限公司 | Method for recycling industrial cleaning wastewater and device thereof |
-
2011
- 2011-06-17 CN CN 201110163911 patent/CN102285736B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102285736A (en) | 2011-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102285736B (en) | Reverse osmosis pre-treatment method for recycling reclaimed water in electric power plant | |
| CN109678280B (en) | High-recovery-rate circulating water sewage desalination treatment recycling system of thermal power plant | |
| CN102030437B (en) | Method for comprehensive wastewater desalination and zero pollution release in steel production | |
| CN104710040B (en) | A kind of high-recovery technique for handling high-sulfate high rigidity mine water | |
| CN104118956B (en) | A kind of method of sewage disposal | |
| CN103964619B (en) | A kind of method of Sewage Plant tail water pre-coating film advanced treatment and reuse | |
| CN204022592U (en) | A kind of Treated sewage reusing treatment facility | |
| CN210528679U (en) | Mine water resourceful treatment recycling system | |
| CN203999258U (en) | The integrated Sewage treatment systems in a kind of cement mill | |
| CN104355450A (en) | High-salinity wastewater grading recycling process | |
| CN113045059A (en) | Treatment system and treatment process for realizing zero discharge of wastewater by full-membrane method | |
| CN204281479U (en) | A kind for the treatment of system of coating wastewater | |
| CN205442869U (en) | It produces brackish water desalination system of water recovery rate to improve bitter | |
| CN101077813A (en) | Method for processing breadboard industrial waste water | |
| CN111252961A (en) | Treatment method of garbage penetrating fluid | |
| CN215975344U (en) | Treatment system for realizing zero discharge of wastewater by full-membrane method | |
| CN213141592U (en) | High rate of recovery reuse of reclaimed water advanced treatment system | |
| CN112028273B (en) | A high-recovery rate water reuse deep treatment system and treatment method | |
| CN206705854U (en) | A kind of Treated sewage reusing automates advanced treatment system | |
| CN203498181U (en) | System for recycling waste acid and waste alkali | |
| CN210286943U (en) | Geothermal tail water desalination recycling treatment system | |
| CN201313858Y (en) | Steel Wastewater Zero Discharge Regeneration and Reuse Combined Device | |
| CN109422383A (en) | A kind of Treated sewage reusing treatment process | |
| CN207130053U (en) | A kind of RO concentrated waters and the water reuse (treatment processing system of recirculated water draining | |
| CN206692476U (en) | A kind of pickling waste waters treatment for reuse system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE ELECTRIC NET CROP. HEBEI ELECTRIC POWER CORP Effective date: 20130105 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 050021 SHIJIAZHUANG, HEBEI PROVINCE TO: 050091 SHIJIAZHUANG, HEBEI PROVINCE |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20130105 Address after: 050091 Hebei high tech District of Shijiazhuang City Xinshi North Road, No. 86 Applicant after: Hebei Electric Power Construction & Adjustment Research Institute Applicant after: State Grid Corporation of China Applicant after: Electric Power Research Institute of Hebei Electric Power Corporation Address before: 050021 No. 238 South Sports street, Hebei, Shijiazhuang Applicant before: Hebei Electric Power Construction & Adjustment Research Institute |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |