CN210050826U - Device for evaporating waste water by using boiler flue gas - Google Patents
Device for evaporating waste water by using boiler flue gas Download PDFInfo
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- CN210050826U CN210050826U CN201920815813.4U CN201920815813U CN210050826U CN 210050826 U CN210050826 U CN 210050826U CN 201920815813 U CN201920815813 U CN 201920815813U CN 210050826 U CN210050826 U CN 210050826U
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Abstract
A device for evaporating waste water by using boiler smoke relates to the technical field of water treatment, and comprises a high-temperature smoke outlet pipeline and a smoke return pipe, wherein a heat transfer medium heater, a waste water evaporator and a condenser are arranged, the heat source of the heat transfer medium heater is high-temperature smoke at the tail part of a boiler, the high-temperature smoke enters the heat transfer medium heater from a smoke inlet, is changed into low-temperature smoke after exchanging heat with a heated medium, is discharged to the smoke return pipe from a smoke outlet, the heated medium is sent into the waste water evaporator to heat and evaporate waste water, part of water vapor formed after the waste water is evaporated returns to the heat transfer medium heater to be heated to participate in the water vapor heating of the waste water, the waste water is evaporated to generate the circulation of the water vapor, the other part of the water vapor enters the condenser, the cold source of the condenser is cold air entering the boiler, the water vapor is condensed into water and is discharged from a, the heat is used by the boiler, the utility model has the characteristics of low energy consumption, low operation cost and environmental protection.
Description
Technical Field
The utility model belongs to the technical field of the water treatment technique and specifically relates to an utilize boiler flue gas to carry out waste water evaporation's device.
Background
In the waste water evaporation treatment process, people pay the most attention to the energy consumption problem, and the waste water of a thermal power plant is generally treated by reverse osmosis. Concentrated water generated by reverse osmosis treatment is difficult to treat, and particularly, waste water discharged by a flue gas desulfurization and denitrification system of a thermal power plant is difficult to treat. At present, in some power plants, high-temperature flue gas at the tail part of a boiler is used for evaporating waste water, the waste water is directly sprayed into the high-temperature flue gas at the tail part of the boiler to evaporate the waste water into steam, and the steam is discharged into the atmosphere along with the flue gas. The method only solves the problem of waste water discharge, but wastes a large amount of energy.
Disclosure of Invention
The to-be-solved technical problem of the utility model lies in providing a device that utilizes boiler flue gas to carry out waste water evaporation that consumes energy is low, the running cost is low, environmental protection to the not enough of prior art.
The utility model aims to solve the technical problem by adopting the following technical proposal, the utility model is a device for evaporating waste water by utilizing boiler smoke, which comprises a high-temperature smoke outlet pipeline leading high-temperature smoke from the tail part of a boiler and a smoke return pipe connected with a low-temperature smoke outlet pipeline at the tail part of the boiler, and is characterized in that the device is provided with a heat transfer medium heater, a waste water evaporator and a condenser,
the heat transfer medium heater is provided with a heated medium inlet and a heated medium outlet, a surface type tubular heat exchanger is arranged in the heat transfer medium heater, the surface type tubular heat exchanger is provided with a flue gas inlet and a flue gas outlet, the flue gas inlet is connected with a high-temperature flue gas outlet pipeline, and the flue gas outlet is connected with a smoke return pipe;
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 water vapor and wastewater mixed evaporation chamber is provided with a heat transfer medium access port and a steam collecting device, and the heat transfer medium access port is connected with a heated medium outlet of the heat transfer medium heater; the steam collecting device is provided with a steam outlet I and a steam outlet II; the steam outlet I is connected with a heated medium inlet of the heat transfer medium heater;
the condenser is provided with a steam inlet, an exhaust port and a condensed water exhaust port, the steam inlet is connected with a steam outlet II of the steam collecting device, the exhaust port is provided with an exhaust pipe, and the exhaust pipe is connected with a vacuum pump for pumping out non-condensed gas in the condenser;
the condenser is internally provided with a surface type heat exchanger, the surface type heat exchanger is provided with an air inlet and an air outlet, an air inlet pipe is arranged on the air inlet, the air inlet pipe is connected with a cold air fan which conveys cold air into the condenser, an air outlet pipe is arranged on the air outlet, and the air outlet pipe is connected with an air supply pipeline which supplies air to the boiler.
The to-be-solved technical problem of the utility model can also be further realized through following technical scheme, above the device that utilizes boiler flue gas to carry out waste water evaporation: a rotary scraper is arranged in the concentrated water tank of the waste water evaporator, and a residue outlet is arranged at the bottom of the waste water tank.
The to-be-solved technical problem of the utility model can also be further realized through following technical scheme, above the device that utilizes boiler flue gas to carry out waste water evaporation: 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 to-be-solved technical problem of the utility model can also be further realized through following technical scheme, above the device that utilizes boiler flue gas to carry out waste water evaporation: and a steam flow regulating valve is arranged on a connecting pipeline between a steam outlet II of the steam collecting device and a steam inlet of the condenser.
The to-be-solved technical problem of the utility model can also be further realized through following technical scheme, above the device that utilizes boiler flue gas to carry out waste water evaporation: and a circulating fan is arranged on a pipeline connecting a heated medium inlet of the heat transfer medium heater with a steam outlet I of the steam collecting device.
The to-be-solved technical problem of the utility model can also be further realized through following technical scheme, above the device that utilizes boiler flue gas to carry out waste water evaporation: the air supply pipeline for supplying air to the boiler is provided with a branch air supply pipeline which is connected with an air inlet of the cold air fan.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the method comprises the following steps of taking high-temperature flue gas at the tail part of a boiler as a heat source, introducing the high-temperature flue gas at the tail part of the boiler into a heat transfer medium heater through a flue gas inlet of the heat transfer medium heater, heating a heated medium entering the heat transfer medium heater, and enabling the low-temperature flue gas after heat transfer to return to a main stream flue gas pipeline by connecting a flue gas outlet of the heat transfer medium heater with a flue gas outlet at the flue gas side of an air preheater of the boiler to realize circulation of the flue gas of;
(2) cold air before entering a boiler air preheater is used as a cold source, a steam outlet II of the waste water evaporator is connected with a steam inlet, high-temperature water vapor in the waste water evaporator is introduced into a condenser, the cold air before entering the boiler air preheater is introduced into the condenser through an air inlet of the condenser, and the cold air exchanges heat with the high-temperature water vapor to condense the high-temperature water vapor into water which is discharged from a condensed water discharge outlet of the condenser for utilization; the air outlet is connected with the air inlet at the air side of the boiler air preheater, so that cold air before entering the boiler air preheater exchanges heat with high-temperature water vapor and then is input into the boiler air preheater, part of air in the boiler air preheater is indirectly heated, and the cyclic utilization of energy is realized;
(3) the inlet of the heated medium is connected with the steam outlet I of the steam collecting device, so that the steam is heated and enters the waste water evaporator to exchange heat with the waste water, so that the waste water is evaporated, the steam collecting device is arranged, the steam collecting device is connected with the heated medium inlet of the heat transfer medium heater, so that the low-temperature steam after heat exchange with the waste water is sent to the heat transfer medium heater to be heated, the heated steam enters the waste water evaporator again to exchange heat with the waste water, and the energy is recycled in a reciprocating way.
This utilize boiler flue gas to carry out waste water evaporation's device combines power plant's boiler afterbody high temperature flue gas, low temperature air and waste water evaporation processing system organically and carries out the evaporation treatment to power plant's waste water, be the technical innovation that goes on traditional boiler flue gas, steam system of power plant, make the device that utilizes boiler flue gas to carry out waste water evaporation become boiler system's a component part, the realization is to boiler system's improvement, can be under the condition that does not influence boiler operation safety, with few energy loss, accomplish waste water evaporation treatment, economy is feasible, and carry out the evaporation treatment with the waste water that electricity generation (or heat supply) in-process produced and retrieve in the electricity generation (or heat supply), reach environmental protection and energy-conserving purpose.
Drawings
FIG. 1 is a system diagram of the present invention in connection with a boiler;
FIG. 2 is a schematic diagram of a device for evaporating waste water from boiler flue gas.
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.
In the figure: 1-boiler furnace, 2-boiler economizer, 3-boiler air preheater, 4-boiler blower, 5-boiler dust remover, 6-boiler induced draft fan, 7-boiler chimney, 8-boiler SCR reactor (denitration device), 9-heat transfer medium heater, 10-waste water evaporator, 11-condenser, 12-circulating fan, 13-cold air fan, 14-flue gas flow control door, 15-steam flow control valve, 16-waste water feed pump to be evaporated, 17-vacuum pump, 18-rotary scraper.
[ example 1 ]
Referring to fig. 1 and fig. 2, a device for evaporating wastewater by using boiler flue gas comprises a high-temperature flue gas outlet pipeline for leading high-temperature flue gas out of the tail of a boiler and a smoke return pipe connected with a low-temperature flue gas outlet pipeline of the tail of the boiler, the device for evaporating wastewater by using boiler flue gas is provided with a heat transfer medium heater 9, a wastewater evaporator 10 and a condenser 11, the heat transfer medium heater 9 is provided with a heated medium inlet and a heated medium outlet, the heated medium is steam generated by evaporating wastewater from the wastewater evaporator 10, a surface type tubular heat exchanger is arranged in the heat transfer medium heater 9, the surface type tubular heat exchanger is provided with a flue gas inlet and a flue gas outlet, the flue gas inlet is connected with the high-temperature flue gas outlet pipeline, and the flue gas outlet is connected with the smoke return pipe; the high-temperature flue gas flows in the heat exchange pipe, and the heated medium, namely the steam, reversely flows outside the heat exchange pipe, so that the sufficient heat exchange between the high-temperature flue gas and the heat transfer steam is realized.
The waste water evaporator 10 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 water vapor and wastewater mixing evaporation chamber is provided with a heat transfer medium access port and a steam collecting device, and the heat transfer medium access port is connected with a heated medium outlet of the heat transfer medium heater 9; the steam collecting device is provided with a steam outlet I and a steam outlet II; the steam outlet I is connected with a heated medium inlet of the heat transfer medium heater 9; the condenser 11 is provided with a steam inlet, an exhaust port and a condensed water exhaust port, the steam inlet is connected with a steam outlet II of the steam collecting device, the exhaust port is provided with an exhaust pipe, and the exhaust pipe is connected with a vacuum pump 17 for pumping out non-condensed gas in the condenser 11;
the condenser is characterized in that a surface type heat exchanger is arranged in the condenser 11 and provided with an air inlet and an air outlet, an air inlet pipe is arranged on the air inlet, the air inlet pipe is connected with a cold air fan 13 which conveys cold air into the condenser 11, an air outlet pipe is arranged on the air outlet, and the air outlet pipe is connected with an air supply pipeline which supplies air to the boiler. The cooling medium of the condenser 11 is cold air, the cold air can be directly sucked from the outside by a cold air blower 13 and conveyed into the condenser 11, part of the cold air before entering the boiler air preheater 3 can also be led out from an air supply pipeline behind an air outlet of a boiler blower 4 and conveyed into the condenser 11 from an air inlet pipeline, heat transfer steam flows on one side of a heat exchange surface, the cold air reversely flows on the other side of the heat exchange surface, the heat transfer steam and the cold air are fully exchanged, the temperature of the cold air is increased after heat exchange, the cold air enters a branch air supply pipeline from the air outlet and is converged with a main air supply pipeline entering the boiler air preheater 3 and conveyed into the boiler air preheater 3.
A rotary scraper is arranged in a concentrated water pool of the waste water evaporator 10, and a residue outlet is arranged at the bottom of the waste water pool.
A steam-water separator is arranged above or below a water vapor and wastewater mixed evaporation chamber of the wastewater evaporator 10 and 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. Waste water to be evaporated is conveyed into the waste water evaporator 10 through a waste water pipe to be evaporated by a waste water feed pump 16 to be evaporated, the waste water to be evaporated falls through a waste water spraying device to be evaporated, heat transfer water vapor moves backwards and upwards from the lower part, the heat transfer water vapor is fully contacted with the waste water droplets to be evaporated for heat exchange, the waste water droplets to be evaporated are heated and evaporated to generate water vapor which moves upwards and is mixed with the heat transfer water vapor, the water vapor in the waste water evaporator 10 is increased, the water vapor is subjected to vapor-water separation through a vapor-water separator after rising, the water separated by the vapor-water separator flows into a concentrated water tank through a water separation pipe, and the water vapor separated by the vapor-water separator is collected by a vapor collection device through.
And a steam flow regulating valve 15 is arranged on a connecting pipeline between a steam outlet II of the steam collecting device and a steam inlet of the condenser 11.
And a circulating fan 12 is arranged on a pipeline connecting a heated medium inlet of the heat transfer medium heater 9 with a steam outlet I of the steam collecting device.
The supply air duct for supplying air to the boiler is provided with a branch supply air duct which is connected with an air inlet of the cold air blower 13.
The working principle is as follows:
a device for evaporating wastewater by using boiler smoke is used as a part of a boiler system, a smoke exhaust pipeline at the tail part of a boiler furnace 1 is connected with a boiler economizer 2, the smoke exhaust pipeline is connected with a smoke inlet of the boiler economizer 2, a heat exchange coil is arranged in the boiler economizer 2, the inlet end of the heat exchange coil is connected with a boiler water supply pipeline, the outlet end of the heat exchange coil is connected with a boiler water inlet through a water supply pipeline, the smoke outlet of the boiler economizer 2 is connected with the smoke inlet of an SCR (denitration device) 8 through a smoke outlet pipeline, the smoke outlet of the SCR (denitration device) 8 is connected with a boiler air preheater 3, a branched high-temperature smoke outlet pipeline is arranged on a high-temperature smoke pipe between a smoke outlet of an SCR (selective catalytic reduction) reactor (denitrification device) 8 and a smoke inlet of a boiler air preheater 3, and the high-temperature smoke outlet pipeline is connected with a smoke inlet of a heat transfer medium heater 9; the smoke outlet of the boiler air preheater 3 is connected with a main smoke exhaust pipeline, the main smoke exhaust pipeline is connected with a boiler chimney 7, a boiler dust remover 5 and a boiler induced draft fan 6 are sequentially arranged on the main smoke exhaust pipeline, a smoke return pipe is arranged on the main smoke exhaust pipeline in front of the boiler dust remover 5 in a branching mode, and the smoke return pipe is connected with a smoke outlet of a heat transfer medium heater 9. The cold air inlet of the boiler air preheater 3 is provided with an air supply pipeline, the air supply pipeline is connected with a boiler air feeder 4, the air supply pipeline is provided with a branched air outlet pipe, the air outlet pipe is connected with the air outlet of the condenser 11, and the hot air outlet of the boiler air preheater 3 is connected with the air inlet of the boiler hearth 1 through the air supply pipeline.
Boiler flue gas flow:
high-temperature flue gas at the tail of a boiler is firstly introduced into a boiler economizer 2 and exchanges heat with boiler water flowing through a heat exchange coil inside the boiler economizer 2, the high-temperature flue gas is cooled by the boiler economizer 2 for the first time and then enters an SCR (selective catalytic reduction) reactor (denitration device) 8 for denitration treatment, the temperature of the high-temperature flue gas after denitration is 330-350 ℃, the high-temperature flue gas is divided into two paths, one path of the high-temperature flue gas enters a boiler air preheater 3 for heating cold air sent to the boiler and is cooled for the second time to become low-temperature flue gas, the low-temperature flue gas is discharged from a flue outlet of the boiler air preheater 3 to a main flue gas discharge pipeline, and the low-temperature flue gas after dust removal by a boiler dust remover 5 is introduced into a boiler chimney 7 by a boiler induced; one path is sent to a heat transfer medium heater 9 by a high-temperature smoke outlet pipeline to heat a heat transfer medium, is controlled by a smoke flow control door 14 after being cooled for the second time by the heat transfer medium, is discharged to a smoke return pipe, is converged by the smoke return pipe and a main smoke exhaust pipeline, is dedusted by a boiler deduster 5, is introduced into a boiler chimney 7 by a boiler induced draft fan 6, and is finally exhausted to the atmosphere.
Boiler water supply flow:
boiler feed water flows through the heat exchange coil pinched by the boiler economizer 2 and exchanges heat with high-temperature smoke at the tail of the boiler entering the boiler economizer 2, and the boiler feed water absorbs heat of the high-temperature smoke at the tail of the boiler and is supplied to the boiler through a water supply pipeline.
External cold air flow:
one path of external cold air is input into the boiler air preheater 3 through an air supply pipeline by a boiler blower 4, and after heat exchange is carried out between the external cold air and high-temperature flue gas entering the boiler air preheater 3, the temperature of the cold air is raised and the cold air is supplied to a boiler hearth 1 through an air supply pipeline; the other path of external cold air is input into the condenser 11 through an air inlet pipeline by a cold air fan 13, exchanges heat with high-temperature steam in the condenser 11, the temperature of the cold air is increased, the cold air flows to an air supply pipeline through an air outlet pipeline, is converged with the cold air in the air supply pipeline, enters the boiler air preheater 3 together for heating, and is finally supplied to the boiler.
Heat transfer medium (steam) flow:
the heat transfer medium in the heat transfer medium heater 9 is steam, the heat transfer steam absorbs the heat of the high-temperature flue gas entering the heat transfer medium heater 9 and then enters the waste water evaporator 10 to be heated and evaporated to obtain waste water to be evaporated, the waste water to be evaporated is heated and evaporated to obtain steam, the evaporated steam and the heat transfer steam are mixed and then divided into two paths, one path of the steam is discharged from a steam outlet I of the steam collecting device, sucked out by the circulating fan 12 and conveyed into the heat transfer medium heater 9 from a heated medium inlet, the steam returns to the heat transfer medium heater 9 again, and the steam flows back to the waste water evaporator 10 again to heat the evaporated waste water … … after absorbing heat and raising temperature again to perform reciprocating circulation; the other path of water vapor is discharged from a steam outlet II, is regulated and controlled by a steam flow regulating valve 15, enters the condenser 11 from a steam inlet, is condensed into water after exchanging heat with cold air entering the condenser 11, is pumped out from a condensed water discharge outlet by a waste water evaporation condensed water pump, and is conveyed to a recycling place; the air cooled and unable to condense is drawn by the vacuum pump 17 and discharged to the atmosphere.
Wastewater flow:
the waste water to be evaporated is conveyed into the waste water evaporator 10 by a waste water feed pump 16 to be evaporated through a waste water pipe to be evaporated, is changed into fog drops of the waste water to be evaporated by a waste water spraying device to be evaporated, and then the fog drops of the waste water to be evaporated fall to exchange heat with ascending heat transfer water vapor entering the waste water evaporator 10, the waste water to be evaporated is heated and evaporated into water vapor, and the water vapor is mixed with the heat transfer water vapor and collected by a vapor collecting device, so that the flow of the heat transfer medium (water vapor) is completed; the solid particles left after evaporation in the waste water to be evaporated fall into a concentrated water tank under the action of gravity and are cleaned by a rotary scraper 18.
For the boiler air preheater 3, the newly added device for evaporating waste water by using boiler flue gas is equivalent to adding a "bypass air preheater", that is, indirectly heating part of air entering the boiler air preheater 3 by heating the evaporated waste water with high-temperature flue gas at the tail of the boiler and cooling the steam formed by the evaporation of the waste water with part of cold air before entering the boiler air preheater 3. In other words, after the newly added device for evaporating waste water by using boiler flue gas evaporates waste water by using the heat of the flue gas at the tail of the boiler (the part of heat is originally used for heating the air at the empty side of the air preheater 3 of the boiler), the heat is returned to the air entering the air preheater 3 of the boiler through the condenser 11, and the whole process only has a small amount of system equipment heat dissipation loss, and the influence on the thermal efficiency of the boiler is small.
Through the improvement on the boiler system, under the condition that the operation safety of the boiler is not influenced, the waste water evaporation treatment is completed by using less energy loss, the method is very economical and feasible, the high-efficiency recycling of the heat energy of the tail flue gas of the boiler is realized, the energy is saved, the environment is protected, and the efficiency is improved.
Claims (6)
1. The utility model provides an utilize boiler flue gas to carry out waste water evaporation's device, includes the high temperature that draws out high temperature flue gas from the boiler afterbody and the smoke return pipe that meets with the low temperature smoke exhaust pipe way of boiler afterbody, its characterized in that: is provided with a heat transfer medium heater, a waste water evaporator and a condenser,
the heat transfer medium heater is provided with a heated medium inlet and a heated medium outlet, a surface type tubular heat exchanger is arranged in the heat transfer medium heater, the surface type tubular heat exchanger is provided with a flue gas inlet and a flue gas outlet, the flue gas inlet is connected with a high-temperature flue gas outlet pipeline, and the flue gas outlet is connected with a smoke return pipe;
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 water vapor and wastewater mixed evaporation chamber is provided with a heat transfer medium access port and a steam collecting device, and the heat transfer medium access port is connected with a heated medium outlet of the heat transfer medium heater; the steam collecting device is provided with a steam outlet I and a steam outlet II; the steam outlet I is connected with a heated medium inlet of the heat transfer medium heater;
the condenser is provided with a steam inlet, an exhaust port and a condensed water exhaust port, the steam inlet is connected with a steam outlet II of the steam collecting device, the exhaust port is provided with an exhaust pipe, and the exhaust pipe is connected with a vacuum pump for pumping out non-condensed gas in the condenser;
the condenser is internally provided with a surface type heat exchanger, the surface type heat exchanger is provided with an air inlet and an air outlet, an air inlet pipe is arranged on the air inlet, the air inlet pipe is connected with a cold air fan which conveys cold air into the condenser, an air outlet pipe is arranged on the air outlet, and the air outlet pipe is connected with an air supply pipeline which supplies air to the boiler.
2. The apparatus for evaporating wastewater using boiler flue gas as set forth in claim 1, wherein: a rotary scraper is arranged in the concentrated water tank of the waste water evaporator, and a residue outlet is arranged at the bottom of the waste water tank.
3. The apparatus for evaporating wastewater using boiler flue gas as set forth 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.
4. The apparatus for evaporating wastewater using boiler flue gas as set forth in claim 1, wherein: and a steam flow regulating valve is arranged on a connecting pipeline between a steam outlet II of the steam collecting device and a steam inlet of the condenser.
5. The apparatus for evaporating wastewater using boiler flue gas as set forth in claim 1, wherein: and a circulating fan is arranged on a pipeline connecting a heated medium inlet of the heat transfer medium heater with a steam outlet I of the steam collecting device.
6. The apparatus for evaporating wastewater using boiler flue gas as set forth in claim 1, wherein: the air supply pipeline for supplying air to the boiler is provided with a branch air supply pipeline which is connected with an air inlet of the cold air fan.
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| CN201920815813.4U CN210050826U (en) | 2019-06-01 | 2019-06-01 | Device for evaporating waste water by using boiler flue gas |
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| CN201920815813.4U CN210050826U (en) | 2019-06-01 | 2019-06-01 | Device for evaporating waste water by using boiler flue gas |
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