CN213824063U - Take flue gas water intaking system of warm braw function - Google Patents

Take flue gas water intaking system of warm braw function Download PDF

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Publication number
CN213824063U
CN213824063U CN202022721922.5U CN202022721922U CN213824063U CN 213824063 U CN213824063 U CN 213824063U CN 202022721922 U CN202022721922 U CN 202022721922U CN 213824063 U CN213824063 U CN 213824063U
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China
Prior art keywords
flue gas
heat exchanger
water
communicated
condensation heat
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CN202022721922.5U
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王一坤
张广才
蔡文博
柳宏刚
魏星
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The utility model discloses a flue gas water intake system with warm air function, which comprises a flue gas pipeline, a tail flue, a chimney and a condensate water collecting pool after desulfurization of a wet desulfurization tower; flue gas pipeline is linked together with the entry of afterbody flue after wet flue gas desulfurization tower desulfurization, the export of afterbody flue is linked together with the entry of chimney, first condensation heat exchanger, second condensation heat exchanger and defroster have set gradually along the flue gas circulation direction in the afterbody flue, the condensate water collecting pit is located the condensate water export of first condensation heat exchanger bottom, the condensate water export of second condensation heat exchanger bottom and the condensate water export of defroster bottom under, the recovery of vapor in the desulfurizing tower export flue gas can be realized to this system in.

Description

Take flue gas water intaking system of warm braw function
Technical Field
The utility model belongs to thermal power equipment field relates to a take flue gas water intaking system of warm braw function.
Background
The coal-fired unit is still the current main power source for a long time in the future, and the inevitable selection and trend of power development in China are to save water and reduce water resource consumption. The flue gas generated after the fuel of the coal-fired boiler is combusted contains rich water resources, and under the general condition, the flue gas discharged by a coal-fired power plant contains 4-13% of water vapor by volume fraction, so that the flue gas is discharged into the atmosphere, not only is great water resource waste caused, but also the water in the flue gas is condensed in a chimney and forms water to flow down along the wall surface, and the corrosion and scaling of the chimney can be caused. Therefore, the water recovery potential of the thermal power plant is huge, the water in the flue gas is recovered and recycled, and the method has important significance for the construction and economic development of energy bases in water resource deficient areas in China.
At present, the modes of flue gas moisture recovery of a power plant mainly comprise cooling condensation, liquid absorption and membrane separation. The cooling and condensing technology has better engineering adaptability relatively aiming at the characteristics of large coal-fired flue gas flow and high dust content. After the moisture in the flue gas is condensed, a large amount of pollutants such as fine particles and NH4 +、SOxAnd Hg and other harmful substances are removed together, and even the wet flue gas desulfurization with zero water consumption can be realized. A large amount of condensed water is recycledThe water consumption of a power plant can be reduced, and the method has great significance for developing the power industry in 'coal-rich and water-poor' areas in the west of China.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a take flue gas water intaking system of warm braw function, this system can realize the recovery of vapor in the desulfurizing tower export flue gas in.
In order to achieve the purpose, the flue gas water taking system with the warm air function comprises a flue gas pipeline, a tail flue, a chimney and a condensate water collecting tank after desulfurization of a wet desulfurization tower;
flue gas pipeline is linked together with the entry of afterbody flue after wet flue gas desulfurization tower desulfurization, and the export of afterbody flue is linked together with the entry of chimney, has set gradually first condensation heat exchanger, second condensation heat exchanger and defroster along the flue gas circulation direction in the afterbody flue, and the comdenstion water collecting pit is located the condensate outlet of first condensation heat exchanger bottom, the condensate outlet of second condensation heat exchanger bottom and the condensate outlet of defroster bottom under.
The hot air main pipe, the first fan, the second fan and the air cooling radiator are also included;
the outlet of the first fan is communicated with the inlet of the tube bundle in the first condensation heat exchanger, the outlet of the tube bundle in the first condensation heat exchanger is communicated with the hot air main pipe, the outlet of the second fan is communicated with the heat absorption side inlet of the air cooling radiator, the heat absorption side outlet of the air cooling radiator is communicated with the hot air main pipe, the heat release outlet of the air cooling radiator is communicated with the inlet of the tube bundle in the second condensation heat exchanger, and the outlet of the tube bundle in the second condensation heat exchanger is communicated with the heat release side inlet of the air cooling radiator.
The hot air main pipe is communicated with an inlet of a primary fan of the boiler and an inlet of a secondary fan of the boiler.
And the heat absorption side of the second condensation heat exchanger is communicated with the heat release side of the air cooling radiator through a circulating water pump.
The medium in the tube bundle in the first condensing heat exchanger is air.
The medium in the tube bundle in the second condensing heat exchanger is water or other low-temperature medium.
The tube bundle in the first condensing heat exchanger is a light pipe or other tube type which can enhance the heat exchange effect.
The tube bundle in the first condensing heat exchanger is made of metal.
The utility model discloses following beneficial effect has:
take flue gas water intaking system of warm braw function at concrete during operation, flue gas after the desulfurization carries out the heat transfer cooling through first condensation heat exchanger and second condensation heat exchanger in proper order for vapor in the flue gas condenses to the condensate water, and enter into the comdenstion water collecting pit, the flue gas of second condensation heat exchanger exhaust enters into the defroster and carries out the defogging, the liquid drop that the defroster was collected enters into the comdenstion water collecting pit, in order to realize desulfurizing tower export flue gas vapor's recovery, wherein, NH in the flue gas4 +、SO2And harmful substances such as fine particles, Hg and the like dissolved in water are removed by condensed water, and the condensed water can be used for water for a desulfurizing tower or water for a boiler.
Furthermore, the heat collected by the first condensing heat exchanger and the second condensing heat exchanger heats the primary air supply and the secondary air supply, so that the heat is recycled, and the energy consumption is reduced.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Wherein, 1 is a first condensing heat exchanger, 2 is a second condensing heat exchanger, 3 is a demister, 4 is a chimney, 5 is an air cooling radiator, 6 is a circulating water pump, 7 is a condensed water collecting tank, 8 is a primary boiler fan, 9 is a secondary boiler fan, 10 is a first fan, and 11 is a second fan.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the flue gas water intake system with warm air function of the present invention includes a flue gas pipeline after desulfurization in a wet desulfurization tower, a tail flue, a chimney 4 and a condensate water collecting tank 7; flue gas pipeline is linked together with the entry of afterbody flue after the wet flue gas desulfurization tower desulfurization, and the export of afterbody flue is linked together with the entry of chimney 4, has set gradually first condensation heat exchanger 1, second condensation heat exchanger 2 and defroster 3 along the flue gas circulation direction in the afterbody flue, and condensate water collecting pit 7 is located the condensate water export of 1 bottom of first condensation heat exchanger, the condensate water export of 2 bottoms of second condensation heat exchanger and the condensate water export of 3 bottoms of defroster under.
The utility model also comprises a hot air main pipe, a first fan 10, a second fan 11 and an air cooling radiator 5; the outlet of the first fan 10 is communicated with the inlet of the tube bundle in the first condensation heat exchanger 1, the outlet of the tube bundle in the first condensation heat exchanger 1 is communicated with a hot air main pipe, the outlet of the second fan 11 is communicated with the heat absorption side inlet of the air cooling radiator 5, the heat absorption side outlet of the air cooling radiator 5 is communicated with the hot air main pipe, the heat release outlet of the air cooling radiator 5 is communicated with the inlet of the tube bundle in the second condensation heat exchanger 2, the outlet of the tube bundle in the second condensation heat exchanger 2 is communicated with the heat release side inlet of the air cooling radiator 5, and the hot air main pipe is communicated with the inlet of the primary boiler fan 8 and the inlet of the secondary boiler fan 9. Wherein, the heat absorption side of the second condensation heat exchanger 2 is communicated with the heat release side of the air cooling radiator 5 through a circulating water pump 6.
The medium in the tube bundle in the first condensing heat exchanger 1 is air; the medium in the tube bundle in the second condensing heat exchanger 2 is water or other low-temperature medium; the tube bundle of the first condensing heat exchanger 1 can be a light tube or other tube type capable of enhancing the heat exchange effect; the tube bundle in the second condensing heat exchanger 2 can be made of metal or nonmetal.
The utility model discloses a concrete working process does:
1) flue gas condensation and water vapor phase change
Flue gas after coal fired power plant boiler burning gets into and carries out flue gas desulfurization in the wet flue gas desulfurization tower, flue gas after the desulfurization gets into the afterbody flue, wherein, flue gas after the desulfurization carries out the heat transfer cooling through first condensation heat exchanger 1 and second condensation heat exchanger 2 in proper order, carry out the defogging through the defroster again, discharge through chimney 4 at last, the heat of flue gas is taken away to cold wind in the tube bank among the first condensation heat exchanger 1 and the refrigerant in the tube bank among the second condensation heat exchanger 2, the vapor in the flue gas reaches the supersaturation state and takes place the phase transition to condense for the condensation nucleus in the fine particle in the flue gas as the condensation, the liquid drop that forms falls in the comdensation water collecting pit 7 of below under the effect of gravity.
2) Heating by cold air
The cold wind in the tube bank among the first condensation heat exchanger 1 is heated and is formed hot-blastly, then enters into hot-blast female pipe, and the refrigerant in the tube bank among the second condensation heat exchanger 2 absorbs heat and then flows into in the heat release side of air cooling radiator 5 and releases heat to heat the cold wind in the heat absorption side of air cooling radiator 5, in order to form hot-blastly, the hot-blastly of air cooling radiator 5 heat absorption side output enters into hot-blast female pipe, and hot-blastly of hot-blast female pipe output enters into boiler primary air fan 8 and boiler secondary air fan 9.
3) Demisting and discharging flue gas
And the flue gas discharged by the second condensing heat exchanger 2 is demisted by a demister 3 and then discharged by a chimney 4, wherein liquid drops collected by the demister 3 enter a condensate water collecting tank 7.

Claims (8)

1. A flue gas water taking system with a warm air function is characterized by comprising a flue gas pipeline, a tail flue, a chimney (4) and a condensed water collecting tank (7) after desulfurization in a wet desulfurization tower;
flue gas pipeline is linked together with the entry of afterbody flue after wet flue gas desulfurization tower desulfurization, the export of afterbody flue is linked together with the entry of chimney (4), first condensation heat exchanger (1) has set gradually along the flue gas circulation direction in the afterbody flue, second condensation heat exchanger (2) and defroster (3), condensate water collecting pit (7) are located the condensate water export of first condensation heat exchanger (1) bottom, the condensate water export of second condensation heat exchanger (2) bottom and the condensate water export of defroster (3) bottom under.
2. The system for taking water from flue gas with warm air function as claimed in claim 1, further comprising a hot air main pipe, a first fan (10), a second fan (11) and an air cooling radiator (5);
the outlet of the first fan (10) is communicated with the inlet of the tube bundle in the first condensation heat exchanger (1), the outlet of the tube bundle in the first condensation heat exchanger (1) is communicated with a hot air main pipe, the outlet of the second fan (11) is communicated with the heat absorption side inlet of the air cooling radiator (5), the heat absorption side outlet of the air cooling radiator (5) is communicated with the hot air main pipe, the heat release outlet of the air cooling radiator (5) is communicated with the inlet of the tube bundle in the second condensation heat exchanger (2), and the outlet of the tube bundle in the second condensation heat exchanger (2) is communicated with the heat release side inlet of the air cooling radiator (5).
3. The water intake system by flue gas with warm air function according to claim 2, further comprising a primary boiler fan (8) and a secondary boiler fan (9), wherein the main hot air pipe is communicated with an inlet of the primary boiler fan (8) and an inlet of the secondary boiler fan (9).
4. The system for taking water from flue gas with warm air function as claimed in claim 2, wherein the heat absorption side of the second condensation heat exchanger (2) is communicated with the heat release side of the air-cooled radiator (5) through a circulating water pump (6).
5. The system for taking water from flue gas with warm air function according to claim 1, wherein the medium in the tube bundle in the first condensing heat exchanger (1) is air.
6. The system for taking water from flue gas with warm air function as claimed in claim 1, wherein the medium in the tube bundle in the second condensing heat exchanger (2) is water.
7. The system for taking water from flue gas with warm air function according to claim 1, wherein the tube bundle in the first condensing heat exchanger (1) is a light pipe.
8. The system for taking water from flue gas with warm air function as claimed in claim 1, wherein the tube bundle in the first condensing heat exchanger (1) is made of metal.
CN202022721922.5U 2020-11-23 2020-11-23 Take flue gas water intaking system of warm braw function Active CN213824063U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022721922.5U CN213824063U (en) 2020-11-23 2020-11-23 Take flue gas water intaking system of warm braw function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022721922.5U CN213824063U (en) 2020-11-23 2020-11-23 Take flue gas water intaking system of warm braw function

Publications (1)

Publication Number Publication Date
CN213824063U true CN213824063U (en) 2021-07-30

Family

ID=76990025

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022721922.5U Active CN213824063U (en) 2020-11-23 2020-11-23 Take flue gas water intaking system of warm braw function

Country Status (1)

Country Link
CN (1) CN213824063U (en)

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