CN210030094U - Power plant wastewater evaporation treatment system - Google Patents
Power plant wastewater evaporation treatment system Download PDFInfo
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- CN210030094U CN210030094U CN201920386075.6U CN201920386075U CN210030094U CN 210030094 U CN210030094 U CN 210030094U CN 201920386075 U CN201920386075 U CN 201920386075U CN 210030094 U CN210030094 U CN 210030094U
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Abstract
A power plant wastewater evaporation treatment system comprises a wastewater evaporator, a condenser and a heat transfer medium heater, wherein one part of water vapor from the wastewater evaporator is sent to the condenser to be condensed into water, and the other part of water vapor is collected and sent to the heat transfer medium heater to be heated and then returns to the wastewater evaporator again to heat and evaporate wastewater; the heat source of the heat transfer medium heater is from main steam of a turbine or high-temperature steam pumped out from a regenerative system; the cold source of the condenser is condensed water with lower temperature in a turbine condensed water system. And leading out a part of high-temperature steam from a steam extraction system or main steam of the steam turbine to heat a heat transfer medium, and sending the condensed water formed after heat release back to a condensed water system or a drainage system of the steam turbine. And (4) leading out a part of low-temperature condensed water from the turbine condensed water system by using a circulating cooling water pump, and completely returning the part of the low-temperature condensed water to the turbine condensed water system after heat exchange. In the whole process, the heat loss is very little, and the thermodynamic system of the steam turbine cannot be influenced.
Description
Technical Field
The utility model relates to a water treatment technology, in particular to a power plant wastewater evaporation treatment system.
Background
In the evaporation treatment process of wastewater, people pay most attention to the problem of energy consumption, particularly, wastewater discharged by a flue gas desulfurization and denitrification system of a power plant is very difficult to treat, and if the wastewater is treated by the existing evaporation method, the energy consumption is too large. If the reverse osmosis treatment is used, the concentrated water is finally subjected to evaporation treatment, a large amount of energy is consumed, and the system is too complex, so that the operation treatment and maintenance cost is very high.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to prior art not enough, has provided a power plant's waste water evaporation treatment system that power consumption is low, running cost is low.
The to-be-solved technical problem of the utility model is realized through following technical scheme, a power plant's waste water evaporation treatment system, its characteristics are:
it comprises a waste water evaporator, a heat transfer medium heater and a condenser,
the heat transfer medium heater is provided with a heated medium inlet and a heated medium outlet, the heat transfer medium heater is a surface heat exchange tube type heat exchanger, the inlet of the heat exchange tube is connected with a high-temperature steam tube led out from a steam extraction system or main steam of the steam turbine, the outlet of the heat exchange tube is connected with a drain tube, the drain tube is communicated with a condensate system or a drainage system of the steam turbine, and a drainage recovery water tank and a drainage recovery pump are arranged on the drain tube;
the waste water evaporator is provided with an evaporation tank body, the middle part of the evaporation tank body is provided with a water vapor and waste water mixed evaporation chamber, and the lower part of the water vapor and waste water mixed evaporation chamber is provided with a concentrated water tank; a waste water spraying device to be evaporated is arranged at the top of the steam and waste water mixed evaporation chamber and is connected with a waste water pipe to be evaporated;
the heat transfer medium of the waste water evaporator is water vapor, the mixed evaporation chamber of the water vapor and the waste water is provided with an access port of the water vapor of the heat transfer medium, and the access port is connected with the heated medium outlet of the heat transfer medium heater;
the steam and wastewater mixed evaporation chamber is provided with a steam collecting device, the steam collecting device is provided with two steam outlets, and the steam outlet I is connected with a heated medium inlet of the heat transfer medium heater; the steam outlet II is connected with a steam inlet of the condenser;
the condenser is provided with a steam inlet, a condensed water discharge port and an exhaust port, the steam inlet is connected with a steam outlet II of the steam collecting device through a pipeline, a surface type tubular heat exchanger is arranged in the condenser, the inlet end of the surface type tubular heat exchanger is connected with a condensed water pipe which leads low-temperature condensed water out of the turbine condensed water system through a circulating cooling water pump, and the outlet end of the surface type tubular heat exchanger is conveyed back to the turbine condensed water system through a pipeline.
The to-be-solved technical problem of the utility model can also be further realized through following technical scheme, be equipped with rotatory scraper blade in the concentrated pond of waste water evaporimeter, the waste water bottom of the pool communicates with each other through pipeline and waste liquid crystallizer tank. Solid salt slag and the like separated out by crystallization are scraped into a pipeline communicated with the wastewater crystallization tank in the rotating process of the rotating scraper and enter the wastewater crystallization tank along with concentrated water.
The to-be-solved technical problem of the utility model can also be further realized through following technical scheme, be equipped with dense water spray set on the well upper portion of the vapor of waste water evaporimeter and waste water mixing evaporation chamber, dense water spray set links to each other has dense water recirculation pipe, is equipped with dense water recirculation pump on the dense water recirculation pipe, and dense water recirculation pipe is linked together with the upper portion of waste water crystallizer tank. The concentrated water recirculating pump conveys the waste water after the crystallization in the waste water crystallization tank to the concentrated water spraying device for spraying, heating and evaporating again.
The to-be-solved technical problem of the utility model can also be further realized through following technical scheme, be equipped with catch water in the top or the below of waste water evaporator's vapor and waste water mixed evaporation chamber for with water and steam thorough separation, the water that catch water divides out connects with dense pond through the distributive pipe, the vapor that catch water divides out passes through the pipeline and meets with steam collection device. The separated water returns to the concentrated water tank, and the separated water vapor enters the steam collecting device.
The to-be-solved technical problem of the utility model can also be further realized through following technical scheme, the heat transfer medium heater is equipped with the electric auxiliary heater.
Compared with the prior art, the utility model, be the waste water evaporation treatment technology that combines power plant or nuclear power station steam turbine condensate system and backheat steam extraction system (or main steam system) and waste water evaporation treatment system to form, this technology is with the low temperature condensate water of steam turbine condensate system as vaporization system's cooling water, with steam turbine backheat steam extraction system steam or main steam (or electric heater) as vaporization system's heat source, carries out evaporation treatment to power plant's waste water. That is to say, the utility model discloses a technical innovation who goes on power plant or the traditional thermodynamic system of nuclear power station combines together waste water evaporating system and power plant thermodynamic system, makes waste water evaporating system become power plant or nuclear power station thermodynamic system's a component part, carries out the evaporation treatment with the waste water that produces in the power generation process when electricity generation (or electricity generation heat supply) and retrieves, reaches the purpose of environmental protection.
The new waste water evaporating system is equivalent to adding a 'condensed water low-pressure heater' to a turbine thermodynamic system, namely, the low-temperature condensed water of the turbine is indirectly heated in a mode of heating the evaporated waste water by the steam of the thermodynamic system and cooling the steam formed by the waste water evaporation by the low-temperature condensed water of the turbine, so that the temperature of the low-temperature condensed water of the turbine is increased. Therefore, the purpose of evaporating and treating the waste water is achieved, and the purpose of heating the condensed water of the steam turbine is also achieved.
The utility model discloses an in the whole process of waste water evaporation treatment new technology, thermal loss is the heat preservation heat loss of waste water evaporation system equipment, produces water and treats the electromechanical energy consumption of the heat loss difference heat loss of evaporation waste water, fan and water pump etc. nevertheless these energy losses with the utility model discloses a heat that waste water evaporation treatment needs is compared, is very few.
The utility model discloses an in the whole course of work of waste water evaporation treatment process, the steam of heating usefulness and the condensate water of cooling usefulness only transfer heat through the heat exchange surface of heat exchange tube, do not contact with the steam that waste water and waste water evaporation formed, and the water that water and vapor after the completion heat transfer condense become is whole to be sent back to thermodynamic system, that is to say, in whole waste water evaporation treatment course of work, does not have the loss of thermodynamic system working medium. Because the utility model discloses a heat transfer medium (steam or air) pressure that heat exchanger was heated is less than the pressure of heating steam far away, and the vapor pressure that the waste water evaporation that is refrigerated formed is also less than the pressure of steam turbine condensate far away, so the utility model discloses a waste water evaporation treatment process's whole process in-process, can not produce any influence to steam turbine thermodynamic system's quality of water yet.
The utility model discloses an in the whole process of waste water evaporation treatment new technology, owing to only pass through waste water evaporative condenser's heat exchange tube with the condensate water that water pump (or steam turbine condensate pump) were drawn forth from the steam turbine condensate system, do not pass through any valve, directly get back to the steam turbine condensate system, whole circulation passageway is equivalent to a bypass pipeline of steam turbine condensate pipeline, so, can not cause steam turbine condensate water "cutting off the water", can not produce any influence to steam turbine operation safety promptly.
The utility model discloses a to steam turbine thermodynamic system's improvement, be about to the utility model discloses a waste water evaporation treatment system adds steam turbine system, makes steam turbine system have daily waste water evaporation treatment function.
In addition, the heat source of the waste water evaporation treatment process of the utility model can also adopt electric energy, the electric energy is adopted to heat the waste water or the heat transfer working medium (water vapor or air) evaporated by the waste water to evaporate the waste water, and the cold source of the waste water evaporation treatment process still adopts the low-temperature condensed water of the steam turbine.
In conclusion, through the improvement on the thermodynamic system of the steam turbine, the evaporation treatment of the waste water is completed with little energy loss under the condition of not influencing the operation safety of the thermodynamic system of the steam turbine, and the method is very economical and feasible.
Drawings
FIG. 1 is a schematic view of the process flow of the power plant wastewater evaporation treatment of the present invention;
FIG. 2 is a schematic view of the type I wastewater evaporation system of the present invention;
FIG. 3 is a schematic view of the type II wastewater evaporation system of the present invention;
FIG. 4 is a schematic view of the type III wastewater evaporation system of the present invention;
Detailed Description
The following further describes embodiments of the present invention in order to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
An evaporation treatment system for power plant wastewater, which comprises a wastewater evaporator, a heat transfer medium heater and a condenser,
the heat transfer medium heater is provided with a heated medium inlet and a heated medium outlet, the heat transfer medium heater is a surface heat exchange tube type heat exchanger, the inlet of the heat exchange tube is connected with a high-temperature steam tube led out from a steam extraction system or main steam of the steam turbine, the outlet of the heat exchange tube is connected with a drain tube, the drain tube is communicated with a condensate system or a drainage system of the steam turbine, and a drainage recovery water tank and a drainage recovery pump are arranged on the drain tube;
the waste water evaporator is provided with an evaporation tank body, the middle part of the evaporation tank body is provided with a water vapor and waste water mixed evaporation chamber, and the lower part of the water vapor and waste water mixed evaporation chamber is provided with a concentrated water tank; a waste water spraying device to be evaporated is arranged at the top of the steam and waste water mixed evaporation chamber and is connected with a waste water pipe to be evaporated;
the heat transfer medium of the waste water evaporator is water vapor, the mixed evaporation chamber of the water vapor and the waste water is provided with an access port of the water vapor of the heat transfer medium, and the access port is connected with the heated medium outlet of the heat transfer medium heater;
the steam and wastewater mixed evaporation chamber is provided with a steam collecting device, the steam collecting device is provided with two steam outlets, and the steam outlet I is connected with a heated medium inlet of the heat transfer medium heater; the steam outlet II is connected with a steam inlet of the condenser;
the condenser is provided with a steam inlet, a condensed water discharge port and an exhaust port, the steam inlet is connected with a steam outlet II of the steam collecting device through a pipeline, a surface type tubular heat exchanger is arranged in the condenser, the inlet end of the surface type tubular heat exchanger is connected with a condensed water pipe which leads low-temperature condensed water out of the turbine condensed water system through a circulating cooling water pump, and the outlet end of the surface type tubular heat exchanger is conveyed back to the turbine condensed water system through a pipeline.
The bottom of the waste water pool is communicated with a waste liquid crystallizing tank through a pipeline.
Solid salt slag and the like separated out by crystallization are scraped into a pipeline communicated with the wastewater crystallization tank in the rotating process of the rotating scraper and enter the wastewater crystallization tank along with concentrated water.
The middle upper part of a water vapor and wastewater mixed evaporation chamber of the wastewater evaporator is provided with a concentrated water spraying device which is connected with a concentrated water recirculation pipe, the concentrated water recirculation pipe is provided with a concentrated water recirculation pump, and the concentrated water recirculation pipe is communicated with the upper part of the wastewater crystallization tank.
The concentrated water recirculating pump conveys the waste water after the crystallization in the waste water crystallization tank to the concentrated water spraying device for spraying, heating and evaporating again.
A steam-water separator is arranged above or below a water vapor and wastewater mixed evaporation chamber of the wastewater evaporator and is used for thoroughly separating water from steam, water separated by the steam-water separator is connected with a concentrated water pool through a water separation pipe, and the steam separated by the steam-water separator is connected with a steam collecting device through a pipeline.
The separated water returns to the concentrated water tank, and the separated water vapor enters the steam collecting device.
The heat transfer medium heater is provided with an electric auxiliary heater.
As shown in fig. 1 the utility model discloses a power plant's waste water evaporation treatment process flow schematic diagram is shown, draw forth partly high-temperature steam from steam turbine extraction system (or main steam system) and give waste water evaporation heat transfer medium steam heater (15) heating evaporation with working medium (being vapor and air), the high-temperature steam that draws passes through in heat exchange tube (24) of waste water evaporation heat transfer medium heater (15), send the condensation water (being hydrophobic) that forms behind the evaporation outside heat exchange tube (24) with the heat transfer for working medium back to steam turbine condensation water system or hydrophobic system by hydrophobic recovery pump (20).
The working medium for evaporation heated in the steam heater (15) is conveyed into the waste water evaporator (13) by the fan (18) to heat the waste water. The working medium cooled in the waste water evaporator (13) returns to the heater (15) again for heating, and is sent to the waste water evaporator (13) again by the fan (18) after reheating, and the circulation is repeated. The water vapor formed by the waste water heated and evaporated in the waste water evaporator (13) is absorbed into the waste water evaporation steam condenser (14).
The waste water evaporation circulating cooling water pump (16) leads out a part of low-temperature condensed water from a turbine condensed water system (21) point to the waste water evaporation steam condenser (14). The low temperature condensate passes within the heat exchange tubes (23) of the waste water evaporative steam condenser (14), cools the water vapor from the waste water evaporator (13) outside the heat exchange tubes (23), and is then returned to the turbine condensate system at the condensate system (22).
The condensed water leading-out point (21) of the turbine condensed water system is arranged between the turbine condensed water pump (2) and the turbine shaft seal heater (3). Typically, the turbine condensate return point (22) is downstream of the exit point (21). The condensate return point (22) may be upstream of the turbine gland seal heater (3) or downstream of the turbine gland seal heater (3) depending on the temperature of the condensate being returned. Depending on the actual situation, the condensate return point (22) may also be arranged upstream of the point (21). For example, the condensate return point (22) is arranged at the inlet of the condensate pump (2) of the steam turbine, so that the waste water evaporation circulation cooling water pump (16) can be omitted, and the system is simplified.
Waste water evaporation system I type (basic type)
The waste water evaporator evaporates waste water by using water vapor or air as a heat transfer medium for evaporation (note: for convenience of description, the heat transfer medium for evaporation, water vapor or air, will be simply referred to as air hereinafter). As shown in the flow diagram of the type i wastewater evaporator of fig. 2, the type i wastewater evaporator (i.e., basic type) is composed of a shell (30), a hot air distributor (31), a residue cleaning rotary scraper (32), a concentrated water tank (33), a wastewater spray device (34) to be evaporated, a steam collecting device (35), a steam-water separator (36), a concentrated water spray device (37) and a scraper rotary driving device (42). The utility model discloses a waste water evaporation treatment process system of I type of power plant waste water evaporimeter comprises waste water evaporimeter (13), hot air heater (15), steam condenser (14), hot air blower (18), vacuum pump (25), wait to evaporate waste water feed pump (26), dense water recirculation pump (27), circulative cooling water pump (16), the hydrophobic collection box of heating steam (19), the hydrophobic collection water pump of heating steam (20), evaporation steam condensate water (product water) pump (17), waste liquid crystallizer tank (28), steam flow control valve (29).
The wastewater to be evaporated is conveyed into a wastewater to be evaporated spraying device (34) of the wastewater evaporator (13) by a water feeding pump (26) for the wastewater to be evaporated, the wastewater to be evaporated spraying device (34) sprays and atomizes the wastewater, and the wastewater uniformly falls in a fog drop form.
High-temperature steam is led out from a turbine regenerative steam extraction system (or main steam) to a hot air heater (15) to be used as heating steam, the heating steam passes through a heat exchange pipe (24) of the hot air heater (15) and transfers heat to air outside the pipe, water (hydrophobic) condensed after the heating steam releases heat flows into a heating steam hydrophobic recovery box (19), and the water is returned to the turbine hydrophobic system (or a condensed water system) by a heating steam hydrophobic recovery water pump (20).
The hot air fan (18) conveys part of the air collected in the steam collecting device (35) to the hot air heater (15) for heating and temperature rise. The air entering the hot air heater (15) passes through the outside of the heat exchange pipe (24) of the hot air heater (15), absorbs heat, is heated and then returns to the hot air distributor (31), is distributed by the hot air distributor (31), then enters the lower part of the hot air evaporator (13) along the circumferential direction, and then spirally rises, and the hot air is contacted with the falling wastewater fog drops in the spiral rising process to transfer the heat to the wastewater fog drops. The air which transfers heat to the waste water fog drops enters a steam-water separator (36) for steam-water separation after passing through a waste water spraying device (34) to be evaporated, enters a steam collecting device (35) after being separated and dewatered, then flows into a hot air fan (18), is sent into a hot air heater (15) by the hot air fan (18) to be reheated, and is circularly reciprocated.
After the waste water is evaporated into steam, the air volume of the evaporation heat transfer working medium is increased, the increased air is sucked into a steam condenser (14) through a steam flow regulating valve (29) to be cooled, the steam in the air is condensed into water, and the water is pumped out by an evaporation steam condensate water (water production) pump (17); the air which can not be condensed in the wind is pumped out by a vacuum pump (25) and is discharged into the atmosphere.
At the initial stage of starting the system of the waste water evaporator (13), the main component of the evaporated working medium wind is air. Along with the proceeding of the evaporation process of the waste water, the content of water vapor in the air gradually rises, the evaporation working medium air is sucked into the steam condenser (14) and is cooled and condensed into water, the air which can not be condensed is pumped out by the vacuum pump (25) and is discharged into the atmosphere, the content of the evaporation working medium air of the evaporation system is gradually reduced, the relative content of the water vapor is gradually increased, and finally the working medium is basically changed into the water vapor.
The waste water to be evaporated is sprayed into fog drops by a waste water spraying device (34) to be evaporated, the fog drops of the waste water are contacted with hot air in the falling process and are heated and evaporated, the waste water which is not evaporated and salt slag separated from the fog drops fall into a concentrated water tank (33), and then the salt slag and the concentrated water are scraped into a waste liquid crystallization tank (28) by a residue cleaning rotary scraper blade (32). After the salt is crystallized and separated out from the concentrated water in the crystallization tank (28), the concentrated water is conveyed to a concentrated water spraying device (37) by a concentrated water recirculating pump (27), and is sprayed and atomized by the concentrated water spraying device (37) and then is evaporated again.
The waste water evaporation circulating cooling water pump (16) leads out a part of low-temperature condensed water from the turbine condensed water system to the waste water evaporation steam condenser (14), and the low-temperature condensed water passes through the heat exchange pipe (23) of the steam condenser (14) and absorbs the heat of the steam outside the heat exchange pipe (23) and then is completely sent back to the turbine condensed water system.
Waste water evaporation system II type
As shown in fig. 3, the type ii structure of the waste water evaporator is substantially the same as the type i structure of the waste water evaporator, except that the steam collecting device (35) and the steam-water separator (36) of the type ii of the waste water evaporator are at the lower part, the hot air distributor (31) is at the upper part, the hot air flows from top to bottom in the waste water evaporator (13), and the flow direction of the heated hot air is the same as that of the falling waste water mist droplets. The other processes are basically the same as the I type process of the waste water evaporator.
Type III of waste water evaporation system
As shown in FIG. 4, the type III structure of the waste water evaporator is different from the type I structure of the waste water evaporator in that an air guide cylinder (44) is added at the center of the waste water evaporator (13) and a hot air distributor (31) is arranged at the upper part of an evaporation chamber. The evaporation heat transfer medium air enters an evaporation chamber of the waste water evaporator (13) along the circumferential direction through the hot air distributor (31), spirally flows downwards in a channel between the air guide cylinder (44) and the inner wall of the waste water evaporator, and contacts with falling waste water fog drops to release heat. When the wind flows to the lower part, the rotation of the wind drives the waste water fog drops, the salt slag and the like to rotate along the circumferential direction, and the generated centrifugal force throws the waste water fog drops, the salt slag and the like to the inner wall of the evaporator (13) and falls into the concentrated water tank (33), so that the wind and the fog drops and the salt slag are thoroughly separated. The air after the moisture and the salt slag are separated flows into the air guide cylinder from the lower part of the air guide cylinder (44), flows to the upper part from the air guide cylinder (44), enters the steam-water separator (36), is further subjected to steam-water separation, and then enters the steam-water collecting device (35). A partition plate is arranged between the steam-water separator (36) and the evaporation chamber to separate the steam-water separator (36) from the evaporation chamber. The other processes are the same as the I type process of the waste water evaporator.
Claims (5)
1. The utility model provides a power plant's waste water evaporation treatment system which characterized in that:
it comprises a waste water evaporator, a heat transfer medium heater and a condenser,
the heat transfer medium heater is provided with a heated medium inlet and a heated medium outlet, the heat transfer medium heater is a surface heat exchange tube type heat exchanger, the inlet of the heat exchange tube is connected with a high-temperature steam tube led out from a steam extraction system or main steam of the steam turbine, the outlet of the heat exchange tube is connected with a drain pipe, and the drain pipe is communicated with a condensate system or a drainage system of the steam turbine;
the waste water evaporator is provided with an evaporation tank body, the middle part of the evaporation tank body is provided with a water vapor and waste water mixed evaporation chamber, and the lower part of the water vapor and waste water mixed evaporation chamber is provided with a concentrated water tank; a waste water spraying device to be evaporated is arranged at the top of the steam and waste water mixed evaporation chamber and is connected with a waste water pipe to be evaporated;
the heat transfer medium of the waste water evaporator is water vapor, the mixed evaporation chamber of the water vapor and the waste water is provided with an access port of the water vapor of the heat transfer medium, and the access port is connected with the heated medium outlet of the heat transfer medium heater;
the steam and wastewater mixed evaporation chamber is provided with a steam collecting device, the steam collecting device is provided with two steam outlets, and the steam outlet I is connected with a heated medium inlet of the heat transfer medium heater; the steam outlet II is connected with a steam inlet of the condenser;
the condenser is provided with a steam inlet, a condensed water discharge port and an exhaust port, the steam inlet is connected with a steam outlet II of the steam collecting device through a pipeline, a surface type tubular heat exchanger is arranged in the condenser, the inlet end of the surface type tubular heat exchanger is connected with a condensed water pipe which leads low-temperature condensed water out of the turbine condensed water system through a circulating cooling water pump, and the outlet end of the surface type tubular heat exchanger is conveyed back to the turbine condensed water system through a pipeline.
2. The wastewater evaporative treatment system as defined in claim 1, wherein: the bottom of the waste water pool is communicated with a waste liquid crystallizing tank through a pipeline.
3. The evaporative treatment system for wastewater as defined in claim 2, wherein: the middle upper part of a water vapor and wastewater mixed evaporation chamber of the wastewater evaporator is provided with a concentrated water spraying device which is connected with a concentrated water recirculation pipe, the concentrated water recirculation pipe is provided with a concentrated water recirculation pump, and the concentrated water recirculation pipe is communicated with the upper part of the wastewater crystallization tank.
4. The wastewater evaporative treatment system as defined in claim 1, wherein: a steam-water separator is arranged above or below a water vapor and wastewater mixed evaporation chamber of the wastewater evaporator and is used for thoroughly separating water from steam, water separated by the steam-water separator is connected with a concentrated water pool through a water separation pipe, and the steam separated by the steam-water separator is connected with a steam collecting device through a pipeline.
5. The wastewater evaporative treatment system as defined in claim 1, wherein: the heat transfer medium heater is provided with an electric auxiliary heater.
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| CN201920386075.6U CN210030094U (en) | 2019-03-26 | 2019-03-26 | Power plant wastewater evaporation treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114436357A (en) * | 2022-01-19 | 2022-05-06 | 苏州科技大学 | Surface spraying energy recovery type sewage treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114436357A (en) * | 2022-01-19 | 2022-05-06 | 苏州科技大学 | Surface spraying energy recovery type sewage treatment device |
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