CN113830852A - Energy-saving high processing apparatus who contains salt, high COD waste liquid - Google Patents
Energy-saving high processing apparatus who contains salt, high COD waste liquid Download PDFInfo
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- CN113830852A CN113830852A CN202111159216.9A CN202111159216A CN113830852A CN 113830852 A CN113830852 A CN 113830852A CN 202111159216 A CN202111159216 A CN 202111159216A CN 113830852 A CN113830852 A CN 113830852A
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- 239000007788 liquid Substances 0.000 title claims abstract description 44
- 150000003839 salts Chemical class 0.000 title claims abstract description 22
- 239000002699 waste material Substances 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000009833 condensation Methods 0.000 claims abstract 7
- 230000005494 condensation Effects 0.000 claims abstract 7
- 238000011084 recovery Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 abstract description 15
- 239000007789 gas Substances 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 description 10
- 230000008020 evaporation Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000007790 scraping Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000003466 welding 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
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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)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses an energy-saving treatment device for waste liquid with high salt content and high COD (chemical oxygen demand), which comprises a horizontal wiped film evaporator and a horizontal wiped film drier, wherein the horizontal wiped film evaporator is communicated with a feed inlet of the horizontal wiped film drier, and steam outlets of the horizontal wiped film evaporator and the horizontal wiped film drier are respectively communicated with respective gas-liquid separators. The outlet of the gas-liquid separator is communicated with the inlet of the heat pump, the outlet of the heat pump is connected with the steam inlet of the horizontal wiped film evaporator, the steam outlet of the horizontal wiped film evaporator is communicated with the steam inlet of the horizontal wiped film drier, and the condensate outlet of the horizontal wiped film drier is communicated with the condensate tank. And a water outlet pipeline of the water condensation tank is communicated with the water condensation pump, and a gas outlet is respectively communicated with a heat pump inlet and a vacuum pump inlet. The invention can fully recover a large amount of latent heat contained in the evaporated water vapor, and uses the recovered water vapor as a heating heat source for treating wastewater, thereby saving cost, reducing energy consumption, preventing pipeline blockage and improving evaporator and drying efficiency.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection, in particular to an energy-saving treatment device for waste liquid with high salt content and high COD.
Background
With the continuous improvement of the environmental protection requirement, the demand of industries and industrial enterprises on the produced wastewater zero-discharge technical equipment is rising. For wastewater with the salt content of more than 3000ppm, evaporative crystallization equipment is indispensable in the wastewater zero discharge process and is usually used as the most terminal process link of the wastewater zero discharge technology. In the long-term use process of the evaporative crystallization equipment, various trace inorganic salts and organic components contained in the wastewater are continuously concentrated and enriched in the evaporator, so that the evaporator is unstable in operation. In order to ensure the normal operation of the evaporator, a small amount of waste liquid with high salt content and high organic content needs to be continuously discharged from the evaporator so as to stabilize the material components in the evaporator. The waste liquid contains various salts and various organic components, so that the treatment difficulty is extremely high. The existing method for treating the wastewater mainly comprises evaporation equipment which is operated intermittently, such as vacuum kettle type evaporation, vacuum rake type drying and the like. The devices have the problems of high energy consumption (the steam consumption per ton of waste water is 1.2-1.3 times of the evaporation water quantity), low heat exchange efficiency, serious scaling of the heating surface of the device, quick evaporation quantity attenuation and the like in the using process, so that the actual operation stability and reliability of a waste water zero-discharge project are influenced.
Disclosure of Invention
In order to overcome the defects, the invention provides an energy-saving treatment device for waste liquid with high salt content and high COD.
An energy-saving treatment device for waste liquid with high salt content and high COD (chemical oxygen demand) comprises a horizontal wiped film evaporator, a horizontal wiped film drier, a condensate tank, a condensate pump and a vacuum pump, wherein a layer of steam backflow cavity which is not communicated with the interior of the evaporator is wrapped outside the horizontal wiped film evaporator and the horizontal wiped film drier; a solid discharge valve is arranged on the discharge port; the liquid outlet and the liquid inlet are connected through a connecting pipeline, a first switch valve is arranged on the connecting pipeline, a first steam inlet is directly communicated with a steam valve through a steam pipeline, a heating pump is arranged on the steam pipeline, separating pipelines are respectively communicated between a first secondary steam outlet and a second secondary steam outlet and between the first secondary steam outlet and the steam pipeline, gas-liquid separators are arranged on the separating pipelines, and second switch valves are arranged on the separating pipelines of the second secondary steam outlet and the gas-liquid separators; the exhaust port is connected with the vacuum pump through a gas path pipeline, and a three-way valve is arranged on the gas path pipeline; the water outlet is directly connected with the condensate tank, the condensate tank is directly connected with the condensate pump, a recovery pipeline is further communicated between the condensate tank and the gas path pipeline, a third switch valve is arranged on the recovery pipeline, and the recovery pipeline between the third switch valve and the condensate tank is directly connected with the steam pipeline.
According to a preferable scheme of the invention, a steam valve is arranged between the steam pipeline and the externally connected steam pipe, the connection point of the separation pipeline and the steam pipeline and the connection point of the recovery pipeline and the steam pipeline are both positioned between the heating pump and the steam valve, starting steam is input by the externally connected steam pipe initially, the steam valve is closed after the system evaporates enough steam, and only the steam generated by the system is used as a heat source.
According to a preferable scheme of the invention, the first steam inlet and the second steam outlet and the second steam inlet and the second water outlet are opposite in opening direction.
According to a preferable scheme of the invention, the horizontal wiped film evaporator and the horizontal wiped film dryer are both connected with an electric motor.
The invention has the beneficial effects that:
1. the invention can fully recover a large amount of latent heat contained in the evaporated water vapor, and the recovered steam is heated and pressurized to be used as a heating source for treating the wastewater, thereby reducing the consumption of direct steam in the traditional process method and meeting the requirement of system operation only by supplementing a small amount of steam.
2. The wastewater enters the horizontal wiped film evaporator continuously, so that the risk that solid salt and viscous organic matters in the wastewater block a feeding pipeline is greatly reduced.
3. The efficiency of the evaporator is improved by adopting the horizontal wiped film evaporator for continuous and stable evaporation, and the evaporation efficiency of the whole system can be improved by more than 20 percent by adopting the intermittent operation of the horizontal wiped film drier. .
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of the present invention:
wherein: the device comprises a horizontal wiped film evaporator 1, a first switch valve 2, a gas-liquid separator 3, a heating pump 4, a second switch valve 5, a three-way valve 6, a first steam inlet 7, a solid discharge valve 8, a third switch valve 9, a vacuum pump 10, a horizontal wiped film drier 11, a condensate tank 12, a condensate pump 13, a feed inlet 14, a first secondary steam outlet 15, a motor 16, a liquid outlet 17, a steam outlet 18, a second steam inlet 19, a liquid inlet 20, a second secondary steam outlet 21, a water outlet 22 and a steam reflux cavity 23.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, the two components can be communicated with each other, the fixed connection can be welding, gluing and the like, and the specific meaning of the terms in the invention can be understood by those skilled in the art according to specific situations.
The energy-saving treatment device for the waste liquid with high salt content and high COD (chemical oxygen demand) comprises a horizontal wiped film evaporator 1, a horizontal wiped film drier 11, a condensate tank 12, a condensate pump 13 and a vacuum pump 10, wherein a layer of steam return cavity 23 is wrapped outside the horizontal wiped film evaporator 1 and the horizontal wiped film drier 11, the steam return cavity 23 of the horizontal wiped film evaporator 1 is provided with a first steam inlet 7 and a steam outlet 18, the steam return cavity 23 of the horizontal wiped film drier 11 is provided with a second steam inlet 19 and a water outlet 22, the steam return cavity of the horizontal wiped film evaporator 1 penetrating through the surface thereof is provided with a feed inlet 14, a first secondary steam outlet 15 and a liquid outlet 17, and the steam return cavity of the horizontal wiped film drier 11 penetrating through the surface thereof is provided with a liquid inlet 20, a second secondary steam outlet 21, a discharge outlet and an exhaust port; a solid discharge valve 8 is arranged on the discharge port; the liquid outlet 17 is connected with the liquid inlet 20 through a connecting pipeline, the connecting pipeline is provided with a first switch valve 2, a first steam inlet 7 is directly communicated with a steam valve through a steam pipeline, the steam pipeline is provided with a heating pump 4, separating pipelines are respectively communicated between a first secondary steam outlet and a second secondary steam outlet and between the first secondary steam outlet and the steam pipeline, the separating pipelines are provided with gas-liquid separators 3, and a second switch valve 5 is arranged on a second secondary steam outlet 21 and the separating pipelines of the gas-liquid separators 3; the exhaust port is connected with a vacuum pump 10 through a gas path pipeline, and a three-way valve 6 is arranged on the gas path pipeline; the water outlet 22 is directly connected with the condensate tank 12, the condensate tank 12 is directly connected with the condensate pump 13, a recovery pipeline is also communicated between the condensate tank 12 and the air passage pipeline, a third switch valve 9 is arranged on the recovery pipeline, and the recovery pipeline between the third switch valve 9 and the condensate tank 12 is directly connected with the steam pipeline;
the horizontal wiped film evaporator 1 and the horizontal wiped film dryer 11 are both provided with a steam return cavity 23 which is used as a heating source for the horizontal wiped film evaporator 1 and the horizontal wiped film dryer 11, so that the effect of recycling steam waste heat can be realized; the first steam inlet 7 is arranged for directly introducing steam to heat and evaporate the horizontal wiped film evaporator 1, after heating is finished, the steam enters the steam return cavity 23 of the horizontal wiped film drier 11 through the steam outlet 18 to heat and dry the horizontal wiped film drier 11, after heating is finished, the steam is cooled to obtain condensate water, the condensate water enters the condensate tank 12 through the water outlet 22, and then the condensate water is recovered through the condensate pump 13; the first secondary steam outlet 15 and the second secondary steam outlet 21 are arranged for recovering secondary steam generated in the evaporation and drying processes, and are separated by the gas-liquid separator 3, heated by the heating pump 4 and then used for evaporation and drying; the liquid outlet 17 and the liquid inlet 20 are arranged to evaporate the raw material liquid in the horizontal wiped film evaporator 1 and then to enter the horizontal wiped film drier 11 for drying, so that the evaporation efficiency of the two evaporators is improved, and the energy consumption loss can be further reduced; the discharge port is arranged to discharge and pack the dried solid salt and organic matters; an exhaust port is arranged and then a vacuum pump 10 works to control the air pressure in the horizontal type scraping film drier 11, so that solid salt and organic matters can be smoothly discharged.
The connecting point of the separation pipeline and the steam pipeline and the connecting point of the recovery pipeline and the steam pipeline are both positioned between the heating pump 4 and the steam valve; and then the recycled steam can be ensured to enter the steam pipeline and then can be heated by the heating pump 4 to perform cycle work again.
The opening directions of the first steam inlet 7 and the steam outlet 18 and the second steam inlet 19 and the water outlet 22 are opposite; further, the horizontal wiped film evaporator 1 and the horizontal wiped film dryer 11 can be fully heated by steam in the steam return cavity 23, and the government efficiency is improved.
The horizontal wiped film evaporator 1 and the horizontal wiped film drier 11 are both connected with a motor 16; further, the horizontal wiped film evaporator 1 and the horizontal wiped film dryer 11 can improve the evaporation efficiency.
The working principle of the invention is as follows: the wastewater is introduced into the horizontal wiped film evaporator 1, a first secondary steam outlet of the horizontal wiped film evaporator 1 is communicated with the gas-liquid separator 3 and enters the heating pump 4 through the gas-liquid separator 3, and the secondary steam enters the horizontal wiped film evaporator 1 as a heating source after being heated and pressurized by the heating pump 4, so that the wastewater is heated and boiled. The evaporated concentrated wastewater enters a horizontal type scraping film drier 11 through a discharge valve; steam and hot water from the horizontal wiped film evaporator 1 are used as heating heat sources of the horizontal wiped film drier 11, the steam and the hot water are cooled and enter the condensate tank 12, and liquid water is discharged for recycling or directly discharged by the condensate pump 13. The secondary steam generated in the drying process in the horizontal type scraping film drier 11 enters the gas-liquid separator 3 through the second switch valve 5 and then enters the heating pump 4. After the solid salt and the organic matters are dried, the second switch valve 5 is closed, the first switch valve 2 is closed, the three-way valve 6 is opened for emptying, when the pressure in the horizontal dryer reaches the atmospheric pressure, the solid discharge valve 8 is opened, and the solid salt and the organic matters are discharged, packed and enter post-treatment. After the solid is discharged, the solid discharge valve 8 is closed, the three-way valve 6 is switched to the horizontal wiped film dryer 11 to be communicated with the vacuum pump 10, after the vacuum pump 10 is started, the pressure in the horizontal wiped film dryer 11 reaches the pressure in the horizontal wiped film evaporator 1, the second switch valve 5 is started, and the first switch valve 2 is opened to discharge the concentrated solution in the horizontal wiped film evaporator 1 into the horizontal wiped film dryer 11 for the next working cycle.
In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides an energy-saving high processing apparatus who contains salt, high COD waste liquid which characterized in that: the horizontal wiped film evaporator comprises a horizontal wiped film evaporator (1), a horizontal wiped film drier (11), a condensate tank (12) and a vacuum pump (10), wherein a layer of steam return cavity (23) is wrapped outside the horizontal wiped film evaporator (1) and the horizontal wiped film drier (11), the steam return cavity (23) of the horizontal wiped film evaporator (1) is provided with a first steam inlet (7) and a steam outlet (18), the steam return cavity (23) of the horizontal wiped film drier (11) is provided with a second steam inlet (19) and a water outlet (22), the horizontal wiped film evaporator (1) penetrates through the steam return cavity on the surface of the horizontal wiped film evaporator and is provided with a feed inlet (14), a first secondary steam outlet (15) and a liquid outlet (17), and the horizontal wiped film drier (11) penetrates through the steam return cavity on the surface of the horizontal wiped film evaporator and is provided with a drying liquid inlet (20), a second secondary steam outlet (21), a discharge outlet and an exhaust port; the liquid outlet (17) is connected with the liquid inlet (20) through a connecting pipeline, a first switch valve (2) is arranged on the connecting pipeline, a first steam inlet (7) is connected with steam through a steam pipeline, a heating pump (4) is arranged on the steam pipeline, separating pipelines are respectively communicated between a first secondary steam outlet and a second secondary steam outlet and between the steam pipeline, gas-liquid separators (3) are arranged on the separating pipelines, and second switch valves (5) are arranged on the second secondary steam outlet (21) and the separating pipelines of the gas-liquid separators (3); the exhaust port is connected with a vacuum pump (10) through a gas path pipeline, and a three-way valve (6) is arranged on the gas path pipeline; the water outlet (22) is directly connected with the water condensation tank (12), a recovery pipeline is further communicated between the water condensation tank (12) and the air passage pipeline, a third switch valve (9) is arranged on the recovery pipeline, and the recovery pipeline between the third switch valve (9) and the water condensation tank (12) is directly connected with the steam pipeline.
2. The energy-saving treatment device for the waste liquid with high salt content and high COD according to claim 1, is characterized in that: a steam valve is arranged between the steam pipeline and the external steam pipe, and the connecting point of the separation pipeline and the steam pipeline and the connecting point of the recovery pipeline and the steam pipeline are both positioned between the heating pump (4) and the steam valve.
3. The energy-saving treatment device for the waste liquid with high salt content and high COD according to claim 1, is characterized in that: the opening directions of the first steam inlet (7) and the second steam outlet (18) as well as the second steam inlet (19) and the water outlet (22) are opposite.
4. The energy-saving treatment device for the waste liquid with high salt content and high COD according to claim 1, is characterized in that: the horizontal wiped film evaporator (1) and the horizontal wiped film drier (11) are both connected with a motor (16).
5. The energy-saving treatment device for the waste liquid with high salt content and high COD according to claim 1, is characterized in that: the steam inlet of the steam return cavity (23) is far away from the steam outlet and is respectively arranged at two ends of the steam return cavity (23).
6. The energy-saving treatment device for the waste liquid with high salt content and high COD according to claim 1, is characterized in that: the water condensation tank (12) is also connected with a water condensation pump (13); a solid discharge valve (8) is arranged on the discharge hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111159216.9A CN113830852A (en) | 2021-09-30 | 2021-09-30 | Energy-saving high processing apparatus who contains salt, high COD waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111159216.9A CN113830852A (en) | 2021-09-30 | 2021-09-30 | Energy-saving high processing apparatus who contains salt, high COD waste liquid |
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| Publication Number | Publication Date |
|---|---|
| CN113830852A true CN113830852A (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111159216.9A Pending CN113830852A (en) | 2021-09-30 | 2021-09-30 | Energy-saving high processing apparatus who contains salt, high COD waste liquid |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000102701A (en) * | 1998-09-29 | 2000-04-11 | Hisaka Works Ltd | Thin film falling type vacuum evaporator control method and device |
| CN104986910A (en) * | 2015-07-23 | 2015-10-21 | 江苏德邦工程有限公司 | Mechanical steam recompression falling film evaporation process method and system |
| CN207493235U (en) * | 2017-11-16 | 2018-06-15 | 上海一飒环保工程科技有限公司 | A kind of efficient combined-type MVR luwa evaporators |
| CN208182649U (en) * | 2018-04-13 | 2018-12-04 | 江苏和诚制药设备制造有限公司 | The MVR processing equipment of electroplating wastewater |
| CN209237374U (en) * | 2018-12-17 | 2019-08-13 | 上海新奥新能源技术有限公司 | A kind of direct-driving type thermo-compression evaporation concentration systems |
| CN111544910A (en) * | 2020-05-19 | 2020-08-18 | 广州远智能源科技有限公司 | Liquid evaporation, concentration and drying integrated treatment method |
-
2021
- 2021-09-30 CN CN202111159216.9A patent/CN113830852A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000102701A (en) * | 1998-09-29 | 2000-04-11 | Hisaka Works Ltd | Thin film falling type vacuum evaporator control method and device |
| CN104986910A (en) * | 2015-07-23 | 2015-10-21 | 江苏德邦工程有限公司 | Mechanical steam recompression falling film evaporation process method and system |
| CN207493235U (en) * | 2017-11-16 | 2018-06-15 | 上海一飒环保工程科技有限公司 | A kind of efficient combined-type MVR luwa evaporators |
| CN208182649U (en) * | 2018-04-13 | 2018-12-04 | 江苏和诚制药设备制造有限公司 | The MVR processing equipment of electroplating wastewater |
| CN209237374U (en) * | 2018-12-17 | 2019-08-13 | 上海新奥新能源技术有限公司 | A kind of direct-driving type thermo-compression evaporation concentration systems |
| CN111544910A (en) * | 2020-05-19 | 2020-08-18 | 广州远智能源科技有限公司 | Liquid evaporation, concentration and drying integrated treatment method |
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Application publication date: 20211224 |