CN204384990U - A kind of recirculated cooling water lime soften for sewage clarification filtration treatment system - Google Patents
A kind of recirculated cooling water lime soften for sewage clarification filtration treatment system Download PDFInfo
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- CN204384990U CN204384990U CN201420811978.1U CN201420811978U CN204384990U CN 204384990 U CN204384990 U CN 204384990U CN 201420811978 U CN201420811978 U CN 201420811978U CN 204384990 U CN204384990 U CN 204384990U
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- potassium permanganate
- cooling water
- recirculated cooling
- treatment system
- permanganate composites
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- 238000001914 filtration Methods 0.000 title claims abstract description 59
- 239000000498 cooling water Substances 0.000 title claims abstract description 29
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 23
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 23
- 239000004571 lime Substances 0.000 title claims abstract description 23
- 239000010865 sewage Substances 0.000 title claims abstract description 17
- 238000005352 clarification Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000002131 composite material Substances 0.000 claims abstract description 36
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 36
- 239000010802 sludge Substances 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims description 25
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 238000005189 flocculation Methods 0.000 claims description 10
- 230000016615 flocculation Effects 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000000701 coagulant Substances 0.000 claims description 7
- 239000003814 drug Substances 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 6
- 239000003206 sterilizing agent Substances 0.000 claims description 6
- 239000008267 milk Substances 0.000 claims description 4
- 210000004080 milk Anatomy 0.000 claims description 4
- 235000013336 milk Nutrition 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 230000015271 coagulation Effects 0.000 description 8
- 238000005345 coagulation Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 1
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The utility model relates to a kind of water treatment system, especially relates to a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system being applicable to the industrial sectors such as electric power, petrochemical industry, metallurgy.Its floor space mainly solved existing for prior art is comparatively large, and sludge discharge is comparatively large, the technical problem of the low grade of filtration efficiency.The utility model comprises the potassium permanganate composites (1) that can pass into recirculated cooling water, described potassium permanganate composites (1) is connected with mixing pit (2) by pipeline, mixing pit is connected with by pipeline and becomes hole filtering pool (3), become hole filtering pool and be connected with clean water basin (4) by pipeline, and clean water basin connect circulating cooling pond.
Description
Technical field
The utility model relates to a kind of water treatment system, especially relates to a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system being applicable to the industrial sectors such as electric power, petrochemical industry, metallurgy.
Background technology
Along with the day by day in short supply of surface water resources and pollute increasingly serious, the development of industrial enterprise is more and more by the restriction of water resources.Recirculated cooling water water loss is comparatively large, and water amount of blowdown is also larger.By recirculated cooling water sofening treatment, improve concentration rate of circulating cooling water, reduce circulating sewage amount, decreasing pollution thing discharges, and is with a wide range of applications.But raising concentration rate of circulating cooling water, needs to remove the temporary hardness in recirculated cooling water and basicity.
Chinese patent discloses the water treatment device (publication number: CN200820143211.0) of a kind of lime soften for sewage, clarification, filtration, it mainly adopts clarification, filtration process as the advanced treatment process of municipal sewage plant water outlet, remove the index such as temporary hardness, turbidity, as circulating cooling system make up water.It is comparatively large to there is settling pond blowdown flow rate in the method, and settling pond floor space is comparatively large, and blowdown flow rate is comparatively large, does not add sterilizing agent and easily grows algae, affect effluent quality in settling pond; In filter tank, filtrate adopts quartz sand filter media easily to cause the fine filtering material caused because of waterpower sieving action to concentrate on filtering layer surface, affects filtration efficiency, and effluent quality is unstable, the problems such as the backwash water yield is large.
Utility model content
The utility model is to provide a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system, and its floor space mainly solved existing for prior art is comparatively large, and sludge discharge is comparatively large, the technical problem of the low grade of filtration efficiency.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
A kind of recirculated cooling water lime soften for sewage clarification filtration treatment system of the present utility model, comprise the potassium permanganate composites that can pass into recirculated cooling water, described potassium permanganate composites is connected with mixing pit by pipeline, mixing pit is connected with change hole filtering pool by pipeline, become hole filtering pool and be connected with clean water basin by pipeline, and clean water basin connect circulating cooling pond.
Recirculated cooling water is transported to potassium permanganate composites, and potassium permanganate composites has feature: potassium permanganate composites has reaction zone, settling region composition.Reaction zone is divided into two parts: rapid coagulation stirring reaction district, at a slow speed coagulation pulling flow type reaction zone.Former water is incorporated into the central authorities of rapid coagulation agitating reaction pond base plate, uniform fluid flow mixing in reaction zone is made by impeller, the concentration that is cotton-shaped or crystalline solid particle that suspends in reaction zone remains on optimum regime, by the thickened sludge external recirculation system from settling region, sludge concentration in pond is ensured.Coagulation pulling flow type reaction zone at a slow speed, its effect is exactly continuously make alumina blossom particles increase.Alumen ustum slower speeds enters into settling region, can avoid like this damaging alumen ustum or producing vortex, guarantees a large amount of suspended solids uniform deposition in settling region.Alumen ustum accumulates mud and concentrates in bottom, settling region, partial concentration mud is circulated to reaction zone entrance by sludge reflux pump, and excess sludge is delivered to desulphurization system slurry tank by sludge delivery pump.The concentration of thickened sludge is at least 20g/l.Settling region arranges reverse-flow inclined tube, and is precipitated by remaining alumen ustum, and water outlet flows automatically to mixing pit by overflow weir.Potassium permanganate composites water outlet temporary hardness≤1mmol/L.Have stable and reliable operation, floor space is little, characteristics of compact layout, saves the features such as dosing.
Change hole filtering pool is flowed automatically to by the recirculated cooling water after acid adding, become hole filtering pool and there is feature: suspended particle, in filtering layer hole, orthokinetic flocculation occurs in filtration procedure, thus make small granular suspended matters become macrobead suspended substance, thus retained by filtrate, improve filtration efficiency.The filtrate becoming hole filtering pool adopts coarse media (1.2 ~ 2.8mm) and fine filtering material (0.5 ~ 1.0mm) uniform filling.Coarse media relies on whole filtering layer to filter, and avoids general filter chamber to form the surface filtration of filtering layer, reduces filtering layer resistance, also avoid penetrating too early of suspended particle, can also improve filtering velocity.Adding and mix the local porosity significantly reducing coarse media in filtering layer of fine filtering material, improves the throwing out to fine particle in recirculated water, is more conducive to the removal to fine particle, also drastically increase the retaining power in filter tank.Become hole filtering pool delivery turbidity≤3NTU.Have filtering velocity high, holding filth capacity is large, and the cycle of operation is long, and water production rate improves, and operates steadily simple, the features such as effluent quality is good, and backwash is effective, and backwash water consumption is little.
Potassium permanganate composites settling region adopts center suspension formula mud scraper, and mud in settling region is pooled to center sludge bucket, and by part sludge reflux to reaction zone, excess sludge is transported to desulphurization system slurry tank.Reaction zone adopts the mode of rapid coagulation agitating reaction pond, coagulation pulling flow type reaction tank combination at a slow speed, pH value in pond is adjusted to about 10, makes Ca
2+and Mg
2+respectively with CaCO
3with Mg (OH)
2form precipitating from water out, realize the sofening treatment to recirculated water.
Become hole filtering pool and design even water distribution (ensureing there is certain liquid level above filtrate), for better ensureing treatment effect, water distribution and intake method are designed to a female pipe mode, the mode that backwash adopts washing-mixing wastewater with air to clean-wash.Become hole filtering pool valve and all adopt automatic valve, realize automatically controlling.
Potassium permanganate composites, mixing pit, change hole filtering pool equipotential install the on-Line Monitor Device can monitoring the indexs such as turbidity, specific conductivity, temperature, flow, pH value, mud liquid level.
As preferably, described potassium permanganate composites base section mud will be back to potassium permanganate composites reaction zone by sludge reflux pump, and excess sludge delivers to desulphurization system lime slurry case by sludge delivery pump.
As preferably, become hole filtering pool by arranging backwash water pump, the realization of backwash blower fan to the washing of variable orifice gap filter and mixing wastewater with air scouring, after backwash, draining flows automatically to backwash blowoff basin, and backwash draining is transported to potassium permanganate composites water inlet pipe by backwash wet-pit.
As preferably, described potassium permanganate composites front reaction district arranges agitator, realizes fully mixing of recirculated water and medicament, potassium permanganate composites settling region arranges mud scraper, mud is concentrated to bucket region, sludge reflux and conveying adopt electrically operated valve, realize full automatic control.
As preferably, each valve of described change hole filtering pool adopts electrically operated valve.Become hole filtering pool and adopt rare earth porcelain grit filtrate, main particle diameter of filter medium 1.2-2.8mm, attached particle diameter of filter medium 0.5-1.0mm, each valve adopts electrically operated valve, realizes full automatic control.
As preferably, described potassium permanganate composites condensation region, flocculation zone are communicated with medicine system, and medicine system comprises lime milk feeding device, coagulant aids chemicals dosing plant, sterilizing agent chemicals dosing plant, flocculation agent chemicals dosing plant.Milk of lime adopts the unslaked lime of effective content 80%, and coagulant aids adopts 0.1-0.3% polyacrylamide solution, and sterilant adopts 10% solution chlorine bleach liquor, and flocculation agent adopts 10% bodied ferric sulfate liquid.
As preferably, described mixing pit is connected with sulfuric acid chemicals dosing plant by chemical feed pipe.Sulfuric acid adopts 98% vitriol oil liquid.
Therefore, the utility model passes through physico-chemical process, make the hardness to circulating water cooling treatment, turbidity, basicity clearance high, floor space is little, and sludge volume is few, processing efficiency is high, working cost is lower, unattended operation, meets the water quality requirement after the process of circulating cooling system water coolant, improve recirculating cooling water system concentration rate, system architecture economy, rationally.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation of the present utility model.
Component, position and numbering in figure: potassium permanganate composites 1, change hole filtering pool 2, mixing pit 3, clean water basin 4, backwash blowoff basin 5, sludge reflux pump 6, sludge delivery pump 7, backwash water pump 8, backwash wet-pit 9, backwash blower fan 10, lime milk feeding device 11, coagulant aids chemicals dosing plant 12, sterilizing agent chemicals dosing plant 13, flocculation agent chemicals dosing plant 14, sulfuric acid chemicals dosing plant 15, agitator 16, mud scraper 17.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system of this example, as Fig. 1, comprise the potassium permanganate composites 1 that recirculated cooling water enters, potassium permanganate composites water outlet is to mixing pit 2, mixing pit water outlet is to becoming hole filtering pool 3, its water outlet flows automatically to clean water basin 4, and overflows in circulating cooling pond.Partial sludge is back to reaction zone in potassium permanganate composites by sludge reflux pump 6 by potassium permanganate composites base sludge, and excess sludge is delivered to desulphurization system lime slurry case by sludge delivery pump 7.Become hole filtering pool by arranging backwash water pump 8, backwash blower fan 10 realize to its washing and air water air bump rinse operation, after backwash, draining flows automatically to backwash blowoff basin 5, and by backwash wet-pit 9, backwash draining is transported to potassium permanganate composites water inlet pipe.Medicine system comprises lime milk feeding device 11, coagulant aids chemicals dosing plant 12, sterilizing agent chemicals dosing plant 13, flocculation agent chemicals dosing plant 14, sulfuric acid chemicals dosing plant 15.Potassium permanganate composites, mixing pit, change hole filtering pool equipotential install the on-Line Monitor Device can monitoring the indexs such as turbidity, specific conductivity, temperature, flow, pH value, mud liquid level.
Milk of lime adopts the unslaked lime of effective content 80%, and coagulant aids adopts 0.1-0.3% polyacrylamide solution, and sterilant adopts 10% solution chlorine bleach liquor, and flocculation agent adopts 10% bodied ferric sulfate liquid, and sulfuric acid adopts 98% vitriol oil liquid.
This routine designing treatment ability 900 tons/hour, component loops water coolant is delivered to potassium permanganate composites through recycle pump by recirculating cooling water system.
Influent quality: carbonate hardness >=3mmol/L, turbidity >=50NTU, pH value: 7 ~ 9.Effluent quality requires: temporary hardness≤1mmol/L, basicity≤1mmol/L, turbidity≤3NTU, pH value: 7 ~ 8.
Its treatment step is:
A. recirculated cooling water enters into bottom potassium permanganate composites 1 reaction zone, through after rapid coagulation stirring reaction district and at a slow speed behind coagulation pulling flow type reaction zone, alumen ustum precipitates in bottom, settling region and concentrates.Partial concentration mud is circulated to reaction tank entrance through sludge reflux pump 6, and excess sludge is delivered to desulphurization system slurry tank by sludge delivery pump 7.The water outlet of top, settling region flows automatically to mixing pit 3 by overflow weir.In potassium permanganate composites reaction zone, medicament such as feeding lime breast chemicals dosing plant 11, coagulant aids chemicals dosing plant 12, sterilizing agent chemicals dosing plant 13, flocculation agent chemicals dosing plant 14 etc., realizes the process to recirculated water.
B. in mixing pit 3, add the vitriol oil by vitriol oil chemicals dosing plant 15, the vitriol oil regulates pH to be 7.5 ~ 8.3, removes bicarbonate radical in water outlet.
C. flow automatically to after adding the vitriol oil and become hole filtering pool 4, remove suspended substance further, lower turbidity, water outlet is as recirculated cooling water.Become hole filtering pool and backwash water pump 8, backwash blower fan 10 are set, realize the washing to filter tank and air water air bump rinse operation.Backwash water outlet flows automatically to backwash blowoff basin 5, and backwash draining is transported to potassium permanganate composites water inlet pipe by backwash wet-pit 9.
The foregoing is only specific embodiment of the utility model, but constitutional features of the present utility model is not limited thereto, any those skilled in the art is in field of the present utility model, and the change done or modification are all encompassed among the scope of the claims of the present utility model.
Claims (7)
1. a recirculated cooling water lime soften for sewage clarification filtration treatment system, comprise the potassium permanganate composites (1) that can pass into recirculated cooling water, it is characterized in that described potassium permanganate composites (1) is connected with mixing pit (2) by pipeline, mixing pit is connected with by pipeline and becomes hole filtering pool (3), become hole filtering pool and be connected with clean water basin (4) by pipeline, and clean water basin connect circulating cooling pond.
2. a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system according to claim 1, it is characterized in that the bottom of described potassium permanganate composites (1) is communicated with the reaction zone of potassium permanganate composites (1) by sludge pipe, sludge reflux pump (6), the bottom of potassium permanganate composites is also communicated with desulphurization system lime slurry case by sludge pipe, sludge delivery pump (7).
3. a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system according to claim 1 and 2, it is characterized in that being provided with backwash water pump (8) between described change hole filtering pool (3) and clean water basin (4), become hole filtering pool and be also connected with backwash blower fan (10), become hole filtering pool and be connected with backwash blowoff basin (5) by pipeline, backwash blowoff basin is communicated with the water inlet pipe of potassium permanganate composites (1) by backwash wet-pit (9).
4. a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system according to claim 1 and 2, it is characterized in that described potassium permanganate composites (1) front reaction district is provided with agitator (16), the settling region of potassium permanganate composites (1) arranges mud scraper (17), and sludge reflux and conveying adopt electrically operated valve.
5. a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system according to claim 1 and 2, is characterized in that each valve of described change hole filtering pool (3) adopts electrically operated valve.
6. a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system according to claim 1 and 2, it is characterized in that described potassium permanganate composites (1) condensation region, flocculation zone is communicated with medicine system, medicine system comprises lime milk feeding device (11), coagulant aids chemicals dosing plant (12), sterilizing agent chemicals dosing plant (13), flocculation agent chemicals dosing plant (14).
7. a kind of recirculated cooling water lime soften for sewage clarification filtration treatment system according to claim 1 and 2, is characterized in that described mixing pit (2) is connected with sulfuric acid chemicals dosing plant (15) by chemical feed pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811978.1U CN204384990U (en) | 2014-12-22 | 2014-12-22 | A kind of recirculated cooling water lime soften for sewage clarification filtration treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811978.1U CN204384990U (en) | 2014-12-22 | 2014-12-22 | A kind of recirculated cooling water lime soften for sewage clarification filtration treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204384990U true CN204384990U (en) | 2015-06-10 |
Family
ID=53357725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420811978.1U Active CN204384990U (en) | 2014-12-22 | 2014-12-22 | A kind of recirculated cooling water lime soften for sewage clarification filtration treatment system |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348756A (en) * | 2020-04-01 | 2020-06-30 | 广西广宇水资源技术开发有限公司 | Process for removing temporary hardness of water by chemical reaction |
| CN112062329A (en) * | 2020-08-25 | 2020-12-11 | 耒阳金悦科技发展有限公司 | Energy-saving cooling water recovery treatment method |
| CN113603271A (en) * | 2021-09-08 | 2021-11-05 | 云南省生态环境科学研究院 | Treatment method of heavy metal and nitrogen-phosphorus composite polluted water body |
-
2014
- 2014-12-22 CN CN201420811978.1U patent/CN204384990U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348756A (en) * | 2020-04-01 | 2020-06-30 | 广西广宇水资源技术开发有限公司 | Process for removing temporary hardness of water by chemical reaction |
| CN112062329A (en) * | 2020-08-25 | 2020-12-11 | 耒阳金悦科技发展有限公司 | Energy-saving cooling water recovery treatment method |
| CN113603271A (en) * | 2021-09-08 | 2021-11-05 | 云南省生态环境科学研究院 | Treatment method of heavy metal and nitrogen-phosphorus composite polluted water body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210105 Address after: 310000 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang Province (Hangzhou Neusoft venture building) Patentee after: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Address before: 311203, 19 floor, building 1, Pacific Plaza, No. 451 Jincheng Road, Xiaoshan District, Zhejiang, Hangzhou Patentee before: ZHEJIANG DONGFA ENVIRONMENTAL PROTECTION ENGINEERING Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 310000 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang Province (Hangzhou Neusoft venture building) Patentee after: Zhejiang Zheneng Technology Environmental Protection Group Co.,Ltd. Country or region after: China Address before: 310000 99 Huaxing Road, Xihu District, Hangzhou, Zhejiang Province (Hangzhou Neusoft venture building) Patentee before: Zhejiang Tiandi Environmental Protection Technology Co.,Ltd. Country or region before: China |