CN110054321B - System and process for simultaneously treating cutting fluid waste liquid and high-calcium-magnesium waste liquid - Google Patents
System and process for simultaneously treating cutting fluid waste liquid and high-calcium-magnesium waste liquid Download PDFInfo
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- CN110054321B CN110054321B CN201910422458.9A CN201910422458A CN110054321B CN 110054321 B CN110054321 B CN 110054321B CN 201910422458 A CN201910422458 A CN 201910422458A CN 110054321 B CN110054321 B CN 110054321B
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- 239000007788 liquid Substances 0.000 title claims abstract description 56
- 239000002699 waste material Substances 0.000 title claims abstract description 56
- 239000002173 cutting fluid Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 13
- 239000012528 membrane Substances 0.000 claims abstract description 51
- 238000000926 separation method Methods 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 27
- 238000005188 flotation Methods 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 10
- 238000004062 sedimentation Methods 0.000 claims abstract description 8
- 238000004064 recycling Methods 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims description 12
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 7
- 235000013539 calcium stearate Nutrition 0.000 claims description 7
- 239000008116 calcium stearate Substances 0.000 claims description 7
- 235000019359 magnesium stearate Nutrition 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 19
- 239000011575 calcium Substances 0.000 description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 7
- 229910001425 magnesium ion Inorganic materials 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 229910001424 calcium ion Inorganic materials 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000005185 salting out Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000008149 soap solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the field of water treatment, and particularly relates to a system for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid, which comprises a sedimentation tank filled with the high-calcium magnesium waste liquid, a stirring tank filled with the cutting fluid waste liquid and an air flotation machine which are sequentially connected, wherein a water outlet of the air flotation machine is sequentially connected with a sand filter, a security filter and a reverse osmosis membrane separation system, a concentrated solution treated by the reverse osmosis membrane separation system and suspended matters of the air flotation machine are discharged into a landfill site for recharging treatment/garbage mixed combustion incineration treatment, effluent of the reverse osmosis membrane separation system is recycled, a stirring device is arranged in the stirring tank, the stirring frequency is 10-50Hz, the filtering precision of the security filter is 5-50 mu m, and the reverse osmosis membrane separation system is a two-stage RO DTT membrane separation system and comprises a 75bar membrane column and an 120/160bar membrane. The invention also discloses a process using the equipment. Finally, the aims of treating waste by waste, recycling water resources and reducing environmental pollution are fulfilled.
Description
Technical Field
The invention belongs to the field of water treatment, and particularly relates to a system and a process for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid.
Background
The waste cutting fluid and the waste industrial high-calcium magnesium fluid are two common industrial sewages, wherein the waste cutting fluid contains sodium stearate, and the waste industrial high-calcium magnesium fluid contains a large amount of calcium and magnesium ions. At present, the treatment method of cutting fluid waste water includes salting-out method, lactic acid method, coagulation method, displacement method, high-voltage electric method, adsorption method and other emulsion breaking methods, and salting-out coagulation mixing method is mostly adopted.
For the treatment of industrial high calcium and magnesium waste water, the calcium and magnesium ion concentration can be reduced by lime softening or lime soda softening, and then the treatment can be carried out by ion exchange. That is, the above two kinds of wastewater treatment are currently carried out by separate processes.
On the other hand, with the introduction and popularization of reverse osmosis membrane technology (DTRO) technology in recent years, DTRO technology is widely advocated in the characteristics of stability, high effluent quality and the like compared with the traditional technology, but DTRO is used for treating industrial high-calcium and high-magnesium wastewater and needs a hardening pretreatment process for calcium and magnesium ions in the wastewater so as to meet the requirement of water inlet.
Therefore, the traditional sewage treatment process carries out personalized treatment on different sewage, and extra hardness reduction process steps and equipment are added for adopting the DTRO technology with more ideal treatment effect.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a system and a process for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid, and mutual reaction of the cutting fluid waste water and industrial high-calcium magnesium ion waste liquid is realized through a DTRO reverse osmosis membrane separation system, so that the purposes of jointly treating the two waste liquids and recycling reverse osmosis produced water are achieved.
The invention discloses a system for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid, which comprises a sedimentation tank filled with the high-calcium magnesium waste liquid, a stirring tank filled with the cutting fluid waste liquid and an air flotation machine which are sequentially connected, wherein a water outlet of the air flotation machine is sequentially connected with a sand filter, a security filter and a reverse osmosis membrane separation system, concentrated solution of the reverse osmosis membrane separation system and suspended matters of the air flotation machine are discharged into a landfill site for recharging treatment/garbage mixed combustion incineration treatment, effluent of the reverse osmosis membrane separation system is recycled, a stirring device is arranged in the stirring tank, the stirring frequency is 10-50Hz, the filtering precision of the security filter is 5-50 mu m, and the reverse osmosis membrane separation system is a two-stage DTRO membrane separation system and comprises a 75bar membrane column and an 120/160bar membrane column.
Further, the invention simultaneously discloses a process for simultaneously treating the cutting fluid waste liquid and the high-calcium magnesium waste liquid, which comprises the following steps,
The invention has the beneficial effects that: 1. the waste cutting fluid and the industrial high-calcium magnesium waste liquid are uniformly reacted to produce a large amount of suspended matters under the action of a stirrer through a stirring reaction tank, so that the aim of treating waste by waste is fulfilled; 2. separating the reacted suspended matters from the solution by an air flotation machine, and pretreating two polluted water sources by the shortest steps and processes to make the polluted water sources approximately accord with the DTRO treatment standard; 3. in a two-stage DTRO membrane separation system, salt is intercepted, the interception rate is up to more than 99 percent, and high-concentration salt solution is formed, namely, the membrane separation water is produced, and the salt content is less than 0.1 percent; the recovery rate reaches more than 85 percent.
In conclusion, the invention adopts a reaction crystallization coupling DTRO membrane separation system to realize the separation and recovery of the waste cutting fluid and the industrial high-calcium magnesium waste fluid, and has simple and convenient process route and lower energy consumption. The formed high-quality produced water creates economic benefits, realizes the recycling of two waste liquid resources, avoids the ecological environment pollution and is suitable for popularization and application.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
In the figure: 1-a sedimentation tank, 11-high calcium magnesium waste liquid, 12-a first centrifugal pump 1, 2-a stirring tank, 21-cutting fluid waste liquid, 22-a stirring device, 23-a second centrifugal pump 2, 3-an air floatation machine, 32-suspended matters, 33-a clean water pump, 4-a sand filter and a cartridge filter, 5-a reverse osmosis membrane separation system, 51-concentrated liquid, 52-outlet water, and 6-landfill recharging treatment/garbage mixing burning treatment.
Detailed Description
As shown in fig. 1, a system for simultaneously treating cutting fluid waste liquid and high calcium magnesium waste liquid comprises a sedimentation tank 1 filled with high calcium magnesium waste liquid 11, a stirring tank 2 filled with cutting fluid waste liquid 21 and an air flotation machine 3 which are connected in sequence, wherein a water outlet of the air flotation machine 3 is connected with a sand filter, a cartridge filter 4 and a reverse osmosis membrane separation system 5 in sequence, a concentrated solution 51 of the reverse osmosis membrane separation system 5 and suspended matters 32 of the air flotation machine are discharged into a landfill site for recharging treatment/garbage blending combustion incineration treatment 6, an effluent 52 of the reverse osmosis membrane separation system 5 is recycled, a stirring device 22 is arranged in the stirring tank, the stirring frequency is 10-50Hz, the filtering precision of the cartridge filter 4 is 5-50 μm, and the reverse osmosis membrane separation system 5 is a two-stage DTRO membrane separation system and comprises a 75bar membrane column and an 120/160bar membrane column.
A process for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid by using the system comprises the following steps,
the high calcium magnesium waste liquid 11 in the sedimentation tank is conveyed into a stirring tank through a first centrifugal pump 12, and is uniformly stirred with the cutting fluid waste liquid 21 in the stirring tank to generate a solution rich in calcium stearate and magnesium stearate, the stirring frequency is 10-50Hz, the stirring time is 30-50 minutes,
Example 1:
4 cubic meters of mechanical cutting fluid with 0.05mol/L sodium stearate concentration and 1 cubic meter of industrial waste liquid with 0.1mol/L calcium and magnesium ion concentration are stirred in a reaction tank and the high calcium and magnesium waste liquid, the frequency of a stirrer is 30Hz, the stirring time is 0.5 h, the mechanical cutting fluid and the high calcium and magnesium waste liquid enter an air floatation machine, an aerator in the air floatation machine is operated to separate suspended matters from the solution to obtain 5.8KG suspended matters, the solution enters a sand filter and a security filter with the filtering precision of 5 mu m to filter large-particle matters, then under the pressurization of a high-pressure plunger pump, a large amount of ions in water are separated from water through two sections of DTRO reverse osmosis membrane separation systems (comprising a 75bar membrane column and an 120/160bar membrane column), the recovery rate reaches 85%, and the separated 4.25 tons of high-quality effluent reaches the use standard of an industrial park and can be directly recycled.
Example 2:
4 cubic meters of soap solution with sodium stearate concentration of 0.05mol/L and 1 cubic meter of industrial waste liquid with calcium-magnesium ion concentration of 0.1mol/L are stirred in a reaction tank and the high-calcium-magnesium waste liquid, the frequency of a stirrer is 30Hz, the stirring time is 0.5 h, the waste liquid enters an air floatation machine, an aerator in the air floatation machine is operated to separate suspended matters from the solution to obtain 6.1KG suspended matters, the solution enters a sand filter and a security filter with the filtering precision of 5 mu m to filter large-particle matters, then under the pressurization of a high-pressure plunger pump, a large amount of ions in water are separated from the water through two sections of DTRO reverse osmosis membrane separation systems (comprising a 75bar membrane column and an 120/160bar membrane column), the recovery rate reaches 89%, and the separated 4.45 tons of high-quality effluent reaches the use standard of an industrial park and can be directly recycled.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (1)
1. A process for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid is characterized by comprising the following steps: comprises a sedimentation tank (1) filled with high calcium magnesium waste liquid (11), a stirring tank (2) filled with cutting fluid waste liquid (21) and an air flotation machine (3) which are connected in sequence, wherein a water outlet of the air flotation machine (3) is connected with a sand filter and security filter (4) and a reverse osmosis membrane separation system (5) in sequence, a concentrated solution (51) treated by the reverse osmosis membrane separation system (5) and suspended matters (32) of the air flotation machine (3) are discharged into a landfill site for recharging treatment/garbage mixed combustion incineration treatment (6), effluent (52) of the reverse osmosis membrane separation system (5) is recycled, a stirring device (22) is arranged in the stirring tank (2), and the method comprises the following steps of conveying the high calcium magnesium waste liquid in the sedimentation tank (1) into the stirring tank (2) through a first centrifugal pump (12), uniformly stirring the high calcium magnesium waste liquid and the cutting fluid waste liquid in the stirring tank to generate a solution rich in calcium stearate and magnesium stearate, stirring at the frequency of 10-50Hz for 30-50 minutes, conveying the obtained uniformly-stirred solution rich in calcium stearate and magnesium stearate to an air flotation machine (3) through a second centrifugal pump (23), forming suspended matters (32) and impurity solution under the action of the air flotation machine (3), performing landfill recharging treatment/garbage blending incineration treatment on the obtained suspended matters, conveying the obtained impurity solution to a sand filter and security filter (4) through a clean water pump (33), removing large-particle impurities to obtain clear liquid, pressurizing the obtained clear liquid into a reverse osmosis membrane separation system through a high-pressure pump to obtain concentrated liquid (51) and outlet water (52), performing landfill recharging treatment/garbage blending incineration treatment (6) on the obtained concentrated liquid (51), and recycling the obtained outlet water, the reverse osmosis membrane separation system is a two-stage DTRO membrane separation system and comprises a 75bar membrane column and an 120/160bar membrane column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910422458.9A CN110054321B (en) | 2019-05-21 | 2019-05-21 | System and process for simultaneously treating cutting fluid waste liquid and high-calcium-magnesium waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910422458.9A CN110054321B (en) | 2019-05-21 | 2019-05-21 | System and process for simultaneously treating cutting fluid waste liquid and high-calcium-magnesium waste liquid |
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| Publication Number | Publication Date |
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| CN110054321A CN110054321A (en) | 2019-07-26 |
| CN110054321B true CN110054321B (en) | 2021-06-22 |
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| CN201910422458.9A Active CN110054321B (en) | 2019-05-21 | 2019-05-21 | System and process for simultaneously treating cutting fluid waste liquid and high-calcium-magnesium waste liquid |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4610792A (en) * | 1985-01-14 | 1986-09-09 | Memtek Corporation | Membrane filtration process |
| JP2005211766A (en) * | 2004-01-28 | 2005-08-11 | E System:Kk | Method and apparatus for treating fat and oil scum in wastewater containing fat and oil |
| CN102285676A (en) * | 2011-05-25 | 2011-12-21 | 吉林大学 | Method for preparing nano calcium carbonate from epoxypropane saponification waste water by chlorhydrin method |
| CN104088334A (en) * | 2014-06-29 | 2014-10-08 | 衢州迪升工业设计有限公司 | Building wastewater recycling system |
| CN108203134A (en) * | 2018-02-07 | 2018-06-26 | 中山市绿浪助剂有限公司 | Special defoaming agent for chemical landfill leachate treatment |
| CN210176620U (en) * | 2019-05-21 | 2020-03-24 | 烟台金正环保科技有限公司 | System for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid |
-
2019
- 2019-05-21 CN CN201910422458.9A patent/CN110054321B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4610792A (en) * | 1985-01-14 | 1986-09-09 | Memtek Corporation | Membrane filtration process |
| JP2005211766A (en) * | 2004-01-28 | 2005-08-11 | E System:Kk | Method and apparatus for treating fat and oil scum in wastewater containing fat and oil |
| CN102285676A (en) * | 2011-05-25 | 2011-12-21 | 吉林大学 | Method for preparing nano calcium carbonate from epoxypropane saponification waste water by chlorhydrin method |
| CN104088334A (en) * | 2014-06-29 | 2014-10-08 | 衢州迪升工业设计有限公司 | Building wastewater recycling system |
| CN108203134A (en) * | 2018-02-07 | 2018-06-26 | 中山市绿浪助剂有限公司 | Special defoaming agent for chemical landfill leachate treatment |
| CN210176620U (en) * | 2019-05-21 | 2020-03-24 | 烟台金正环保科技有限公司 | System for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid |
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| CN110054321A (en) | 2019-07-26 |
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Denomination of invention: A system and process for simultaneously treating cutting fluid waste liquid and high-calcium magnesium waste liquid Effective date of registration: 20230223 Granted publication date: 20210622 Pledgee: Shandong Shanke Finance Leasing Co.,Ltd. Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2023980033204 |
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Granted publication date: 20210622 Pledgee: Shandong Shanke Finance Leasing Co.,Ltd. Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2023980033204 |