CN110566919B - Wastewater treatment system for recycling steam and treatment method thereof - Google Patents
Wastewater treatment system for recycling steam and treatment method thereof Download PDFInfo
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- CN110566919B CN110566919B CN201910941401.XA CN201910941401A CN110566919B CN 110566919 B CN110566919 B CN 110566919B CN 201910941401 A CN201910941401 A CN 201910941401A CN 110566919 B CN110566919 B CN 110566919B
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- 238000004064 recycling Methods 0.000 title claims abstract description 15
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims abstract description 46
- 230000008020 evaporation Effects 0.000 claims abstract description 32
- 238000001704 evaporation Methods 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/08—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
- F24D1/04—Steam central heating systems operating with exhaust steam
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a wastewater treatment system for recycling steam and a treatment method thereof, comprising a steam inlet pipeline, wherein the steam inlet pipeline is communicated with a turbine mechanism, the turbine mechanism is communicated with a wastewater evaporation treatment device, a rotary output shaft of the turbine mechanism is connected with a steam compressor, and steam inlet and steam outlet ports of the steam compressor are respectively communicated with the wastewater evaporation treatment device; the turbine mechanism comprises a high-pressure driving steam inlet pipe and a driving cavity communicated with the high-pressure driving steam inlet pipe, a metal rotor is arranged in the driving cavity, the metal rotor is connected with a rotary output shaft, the rotary output shaft drives a steam compressor, and a medium-pressure primary steam conveying pipeline is connected with the wastewater evaporation treatment device; the low-pressure secondary steam outlet is connected with a low-pressure secondary steam exhaust pipe which is connected with a steam inlet of the steam compressor. The invention can recycle energy by utilizing the residual pressure of the driving steam (namely, medium-pressure primary steam), thereby recycling low-pressure secondary steam and greatly reducing energy consumption.
Description
Technical Field
The invention relates to the technical field of wastewater treatment equipment, in particular to a wastewater treatment system and a treatment method for recycling steam.
Background
The wastewater treatment (wastewater treatment methods) is to treat the wastewater by physical, chemical and biological methods, so that the wastewater is purified, pollution is reduced, and the wastewater is recovered and reused, thereby fully utilizing water resources.
In the prior art, when wastewater is treated, the wastewater is required to be heated, so that the wastewater is required to be heated by steam with certain temperature and certain high pressure, but the steam which is usually used by enterprises is usually supplied by other enterprises outside through pipelines, the grade of the supplied steam is usually higher than the requirements of the enterprises, and the temperature and pressure are required to be reduced, so that energy waste is caused.
Disclosure of Invention
The invention aims to provide a wastewater treatment system with low energy consumption, which can effectively utilize the residual pressure of high-pressure driving steam to realize the cyclic utilization of the steam and externally output partial low-pressure secondary steam.
The technical aim of the invention is realized by the following technical scheme:
the device comprises a steam inlet pipeline, wherein the steam inlet pipeline is communicated with a turbine mechanism, a steam outlet of the turbine mechanism is connected with a wastewater evaporation treatment device, a rotary output shaft of the turbine mechanism is connected with a steam compressor, and a steam outlet of the steam compressor is communicated with the wastewater evaporation treatment device;
the turbine mechanism comprises a high-pressure driving steam inlet pipe and a driving cavity communicated with the high-pressure driving steam inlet pipe, a metal rotor is arranged in the driving cavity, the metal rotor is connected with a rotary output shaft, the rotary output shaft drives a steam compressor, a steam outlet of the driving cavity is connected with a medium-pressure primary steam conveying pipeline, the medium-pressure primary steam conveying pipeline is connected with a wastewater evaporation treatment device, the wastewater evaporation treatment device is provided with an evaporator, and the evaporator is provided with a medium-pressure primary steam inlet and a low-pressure secondary steam outlet; the low-pressure secondary steam outlet is connected with a low-pressure secondary steam exhaust pipe, and the low-pressure secondary steam exhaust pipe is connected with a steam inlet of the steam compressor.
By adopting the technical scheme, the high-pressure driving steam is introduced into the high-pressure driving steam inlet pipe through the steam inlet pipe, enters the driving cavity and drives the metal rotor to rotate, and the high-pressure driving steam converts self heat energy into kinetic potential energy to do work outwards, so that the temperature and pressure are reduced, the medium-pressure primary steam is converted, and the use specification of a factory is met. Meanwhile, the turbine does work externally, the output rotational kinetic energy is utilized to drive the steam compressor, low-pressure secondary steam generated by the evaporator is compressed to medium-pressure primary steam from low-pressure secondary steam, the low-pressure secondary steam also accords with the use specification of a factory, and the two parts of medium-pressure primary steam are mixed together to serve as a heating source of the wastewater evaporation treatment device, so that the steam quantity is increased, the condensation heat loss is reduced, and the energy recycling is realized.
The invention is further provided with: the middle section of the driving cavity is connected with a medium-pressure primary steam explosion-proof steam exhaust pipe, and a medium-pressure primary steam pressure valve is arranged on the explosion-proof steam exhaust pipe.
By adopting the technical scheme, the pressure in the driving cavity is measured through the medium-pressure primary steam pressure valve, so that the condition that the machine is damaged due to overlarge pressure in the driving pressure bin is reduced. If the pressure is too high, the first pressure valve is opened, and the steam with too high pressure is discharged through the medium-pressure primary steam explosion-proof steam discharge pipe.
The invention is further provided with: the vapor compressor is connected with the wastewater evaporation treatment device.
By adopting the technical scheme, the medium-pressure primary steam compressed by the steam compressor can be input into the wastewater evaporation treatment device again for recycling.
The invention is further provided with: the evaporator is provided with a low-pressure secondary steam explosion-proof exhaust pipe, and the low-pressure secondary steam explosion-proof exhaust pipe is provided with a low-pressure secondary steam pressure valve.
By adopting the technical scheme, the high-pressure driving steam is depressurized, meanwhile, the temperature and low-pressure secondary steam is pressurized, meanwhile, the pressure in a pipeline is detected through the low-pressure secondary steam pressure valve, and when the pressure exceeds the upper limit, the low-pressure secondary steam explosion-proof steam exhaust pipe is opened for steam exhaust depressurization.
The invention is further provided with: and a surplus steam output pipe is arranged at the low-pressure secondary steam outlet.
By adopting the technical scheme, the surplus steam can be output for other heat users to use, so that the aim of reducing waste is fulfilled.
The invention is further provided with: the evaporator is provided with a transparent window along the vertical direction.
By adopting the technical scheme, the water quantity in the evaporator can be conveniently observed by a worker, and the purpose of real-time monitoring is achieved.
The invention is further provided with: the metal rotor is connected with a reduction gearbox, and an output shaft of the reduction gearbox drives the steam compressor.
Through adopting above-mentioned technical scheme, through the reducing gear box, can be with the rotational speed of metal rotor adjustment to the rotational speed that is applicable to vapor compressor.
Another object of the present invention is to provide a wastewater treatment method for steam recycling.
The technical aim of the invention is realized by the following technical scheme:
step one: the high-pressure driving steam enters the driving cavity through the steam inlet pipeline at the speed of 10-60 m/s, the high-pressure driving steam enters the driving cavity to drive the metal rotor to rotate, the high-pressure driving steam is converted into medium-pressure primary steam, and the pressure of the medium-pressure primary steam is about 1bar; simultaneously, the rotating metal rotor outputs rotation work to the outside.
And step two, medium-pressure primary steam enters the wastewater evaporation treatment device through a medium-pressure primary steam conveying pipeline, and after passing through the wastewater evaporation treatment device, the medium-pressure primary steam is condensed into primary condensate after releasing heat in an evaporator and is discharged by a condensate pump. The released heat heats the raw material wastewater, so that the raw material wastewater is evaporated into low-pressure secondary steam.
Step three: the low-pressure secondary steam from the evaporator enters the steam inlet of the compressor, is boosted and heated by the turbine-driven steam compressor and then becomes medium-pressure primary steam, and the medium-pressure primary steam is discharged from the steam outlet of the steam compressor.
Step four: the medium-pressure primary steam from the steam outlet of the steam compressor and the low-pressure secondary steam from the turbine steam outlet are mixed and then enter an evaporator of the wastewater evaporation treatment device to be used as a heating source, so that the recycling of steam is realized.
Step five: the surplus low-pressure secondary steam is supplied to other heat users through a surplus steam output pipe.
In summary, the beneficial effects of the invention are as follows:
1. the turbine mechanism is adopted, so that the rotary work is output outwards while the high-pressure driving steam is converted into medium-pressure primary steam;
2. the rotary shaft driven by the metal rotor is adopted, and the rotary work output by the turbine is utilized to drive the steam compressor, so that the low-pressure secondary steam generated by the evaporator is compressed and recycled, and the purpose of energy conservation is realized;
3. medium-pressure primary steam and low-pressure secondary steam are mixed to be used as heating steam together, so that the increase of the medium-pressure primary steam quantity is realized, and the aim of saving steam consumption is fulfilled;
4. according to energy conservation, the amount of medium-pressure primary steam is increased, and a part of low-pressure secondary steam is inevitably abundant, and the part of steam can be used for heating, bathing, heat tracing or process heating of other heat users, so that heat supply output is realized.
Drawings
Fig. 1 is a schematic overall structure of the present embodiment.
In the figure, 1, a steam inlet pipeline; 2. a turbine mechanism; 21. high-pressure driving steam inlet pipe; 22. a drive chamber; 221. medium pressure primary steam explosion-proof exhaust pipe; 222. a medium pressure primary steam pressure valve; 23. a metal rotor; 231. a reduction gearbox; 24. a medium pressure primary steam delivery pipe; 25. rotating the output shaft; 3. a wastewater evaporation treatment device; 31. an evaporator; 32. a medium pressure primary steam inlet; 33. a low pressure secondary steam exhaust pipe; 331. a surplus steam output pipe; 35. a transparent window; 4. a vapor compressor; 41. a steam inlet; 5. a low-pressure secondary steam explosion-proof steam exhaust pipe; 51. a low pressure secondary steam pressure valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the invention discloses a wastewater evaporation treatment system with steam recycling and a treatment method thereof, which comprises a steam inlet pipeline 1 for leading in high-pressure driving steam, wherein the steam inlet pipeline 1 is communicated with a turbine mechanism 2, the turbine mechanism 2 converts the high-pressure driving steam into medium-pressure primary steam for a wastewater evaporation treatment device 3 of a factory, after the use, the medium-pressure primary steam is condensed into condensed water, and simultaneously, heat is released to evaporate raw wastewater into low-pressure secondary steam. The output end of the turbine mechanism 2 drives the steam compressor 4, the steam compressor 4 converts low-pressure secondary steam into medium-pressure primary steam, the low-pressure secondary steam of the wastewater evaporation treatment device 3 is communicated with the steam compressor 4, the steam compressor 4 converts the low-pressure secondary steam into medium-pressure primary steam to be continuously used by the wastewater evaporation treatment device 3, and therefore the effects of recycling steam and recovering energy are achieved.
Referring to fig. 1, the turbine mechanism 2 includes a high-pressure driving steam inlet pipe 21 and a driving chamber 22 communicating with the high-pressure driving steam inlet pipe 21, the driving chamber 22 having a shape in which a steam inlet is small and one end distant from the steam inlet is gradually enlarged. The metal rotor 23 is arranged in the driving cavity 22, the metal rotor 23 is connected with a rotary output shaft 25, the rotary output shaft 25 is connected with a reduction gearbox 231, the output shaft of the reduction gearbox 231 drives the vapor compressor 4, and the reduction gearbox 231 adjusts the rotating speed of the metal rotor 23 to be suitable for the rotating speed of the vapor compressor 4. The high-pressure driving steam is introduced into the high-pressure driving steam inlet pipe 21, enters the driving cavity 22 and drives the metal rotor 23 to rotate, and the high-pressure driving steam converts self heat energy into power potential energy to do work outwards, so that the temperature and the pressure are reduced, and the high-pressure driving steam is converted into medium-pressure primary steam, and meets the use specifications of factories. The steam outlet of the driving cavity 22 is provided with a medium-pressure primary steam conveying pipeline 24, and the medium-pressure primary steam conveying pipeline 24 is connected with the wastewater evaporation treatment device 3 for wastewater evaporation treatment. In this embodiment, the middle section of the driving cavity 22 is connected with a medium-pressure primary steam explosion-proof steam exhaust pipe 221, a medium-pressure primary steam pressure valve 222 is arranged on the explosion-proof steam exhaust pipe, the pressure in the driving cavity 22 is measured through the medium-pressure primary steam pressure valve 222, if the pressure is too high, the medium-pressure primary steam pressure valve 222 is opened, and the steam with too high pressure is exhausted through the medium-pressure primary steam explosion-proof steam exhaust pipe 221, so that the overall safety is improved.
Referring to fig. 1, the wastewater evaporation treatment apparatus 3 includes an evaporator 31, and the evaporator 31 is provided with a medium-pressure primary steam inlet 32 for steam intake and a low-pressure secondary steam exhaust pipe 33 for steam exhaust. The medium-pressure primary steam inlet is connected to the steam inlet 41 of the steam compressor 4, and the low-pressure secondary steam exhaust pipe 33 is connected to the steam inlet 41 of the steam compressor 4, so that the medium-pressure primary steam compressed by the steam compressor 4 can be input into the evaporator 31 again for recycling.
Referring to fig. 1, in the present embodiment, a low-pressure secondary steam explosion-proof exhaust pipe 5 is provided on an evaporator 31, and a low-pressure secondary steam pressure valve 51 for detecting an internal pressure is provided on the low-pressure secondary steam explosion-proof exhaust pipe 5. It is possible to detect the pressure in the evaporator 31, if the pressure in the evaporator 31 is too large, the low-pressure secondary steam pressure valve 51 is opened, and the steam of which the pressure is too high is discharged through the low-pressure secondary steam explosion-proof steam discharge pipe 5.
The processing method comprises the following steps: step one: the high-pressure driving steam enters the driving cavity 22 through the steam inlet pipeline 1 with the diameter of 0.5 m at the speed of 20 m/s, the high-pressure driving steam enters the driving cavity 22 and drives the metal rotor 23 to rotate, the high-pressure driving steam is converted into medium-pressure primary steam, and the pressure of the medium-pressure primary steam is 1bar;
and step two, medium-pressure primary steam enters the wastewater evaporation treatment device 25 through a medium-pressure primary steam conveying pipeline 24 of the driving cavity 22, and is condensed into primary condensate after heat is released from the evaporator through the wastewater evaporation treatment device 25 and is discharged by a condensate pump. The released heat heats the raw material wastewater, so that the raw material wastewater is evaporated into low-pressure secondary steam with low pressure.
Step three: the low-pressure secondary steam generated in the evaporator enters a steam inlet of the steam compressor 4, is pressurized again by the steam compressor 4 to form medium-pressure primary steam, reaches the pressure of 1bar, and enters the evaporator of the wastewater evaporation treatment device 25 again to circularly heat and evaporate the raw wastewater.
Economic benefit analysis:
1. in this example, medium pressure heating steam was required for 6 tons/hour, high pressure driving steam was consumed for 3.2 tons/hour, low pressure secondary steam was compressed for 5.8 tons/hour, and surplus low pressure secondary steam was 3 tons/hour.
2. The high pressure driving steam was calculated at 200 yuan/ton and the low pressure secondary steam was calculated at 50 yuan/ton, each year at 8000 hours of operation.
3. The cost of high-pressure driving steam consumption is 512 ten thousand yuan each year, the economic benefit of low-pressure secondary steam external supply generation is 120 ten thousand yuan each year, and the actual cost of steam is 392 ten thousand yuan each year.
4. The steam consumption cost of direct steam heating is 960 ten thousand yuan.
5. Steam cost is saved by 568 ten thousand yuan each year.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (6)
1. A waste water treatment system for recycling steam is characterized in that: the device comprises a steam inlet pipeline (1), wherein the steam inlet pipeline (1) is communicated with a turbine mechanism (2), a steam outlet of the turbine mechanism (2) is connected with a wastewater evaporation treatment device (3), a rotary output shaft (25) of the turbine mechanism (2) is connected with a steam compressor (4), and a steam outlet of the steam compressor (4) is communicated with the wastewater evaporation treatment device (3);
the turbine mechanism (2) comprises a high-pressure driving steam inlet pipe (21) and a driving cavity (22) communicated with the high-pressure driving steam inlet pipe (21), a metal rotor (23) is arranged in the driving cavity (22), the metal rotor (23) is connected with a rotary output shaft (25), the rotary output shaft (25) drives a steam compressor (4), a steam outlet of the driving cavity (22) is connected with a medium-pressure primary steam conveying pipeline (24), the medium-pressure primary steam conveying pipeline (24) is connected with a wastewater evaporation treatment device (3), the wastewater evaporation treatment device (3) is provided with an evaporator (31), and the evaporator (31) is provided with a medium-pressure primary steam inlet (32) and a low-pressure secondary steam exhaust pipe (33); the low-pressure secondary steam exhaust pipe (33) is connected to a steam inlet (41) of the steam compressor (4), and a surplus steam output pipe (331) is arranged at the low-pressure secondary steam outlet.
2. A steam-cycle wastewater treatment system as claimed in claim 1, wherein: the middle section of the driving cavity (22) is connected with a medium-pressure primary steam explosion-proof steam exhaust pipe (221), and a medium-pressure primary steam pressure valve (222) is arranged on the medium-pressure primary steam explosion-proof steam exhaust pipe (221).
3. A steam-cycle wastewater treatment system as claimed in claim 2, wherein: the low-pressure secondary steam explosion-proof exhaust pipe (5) is arranged on the evaporator (31), and a low-pressure secondary steam pressure valve (51) is arranged on the low-pressure secondary steam explosion-proof exhaust pipe (5).
4. A steam-cycle wastewater treatment system as claimed in claim 1, wherein: a transparent window (35) is arranged on the evaporator (31) along the vertical direction.
5. A steam-cycle wastewater treatment system as set forth in claim 4, wherein: the metal rotor (23) is connected with a reduction gearbox (231), and an output shaft of the reduction gearbox (231) drives the steam compressor (4).
6. A wastewater evaporation treatment method for steam recycling by using the wastewater treatment system for steam recycling according to any one of claims 1 to 5, characterized by:
step one: the high-pressure driving steam enters the driving cavity (22) through the steam inlet pipeline (1) at the speed of 10-60 m/s, the high-pressure driving steam enters the driving cavity (22), the metal rotor (23) is driven to rotate, the high-pressure driving steam is converted into medium-pressure primary steam, and the pressure of the medium-pressure primary steam is about 1bar; simultaneously, the rotating metal rotor (23) outputs rotation work outwards;
step two, medium-pressure primary steam enters a wastewater evaporation treatment device (3) through a medium-pressure primary steam conveying pipeline (24), and after passing through the wastewater evaporation treatment device (3), the medium-pressure primary steam is condensed into primary condensate after releasing heat in an evaporator (31) and is discharged by a condensate pump;
the released heat heats the raw material wastewater, so that the raw material wastewater is evaporated to be changed into low-pressure secondary steam;
step three: the low-pressure secondary steam from the evaporator (31) enters a steam inlet (41) of the steam compressor (4), is boosted and heated by the turbine-driven steam compressor (4) and then becomes medium-pressure primary steam, and the medium-pressure primary steam is discharged from a steam outlet of the steam compressor;
step four: the medium-pressure primary steam from the steam outlet of the steam compressor (4) and the medium-pressure primary steam from the turbine steam outlet are mixed and then enter an evaporator (31) of the wastewater evaporation treatment device (3) to be used as a heating source, so that the steam is recycled;
step five: the surplus low-pressure secondary steam is supplied to other heat users through a surplus steam output pipe (331).
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| CN201910941401.XA CN110566919B (en) | 2019-09-30 | 2019-09-30 | Wastewater treatment system for recycling steam and treatment method thereof |
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| CN110566919B true CN110566919B (en) | 2024-04-16 |
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| CN211119278U (en) * | 2019-09-30 | 2020-07-28 | 江苏源拓环境科技有限公司 | Waste water treatment system with steam recycling function |
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