CN213901113U - Flue gas deep waste heat recovery system for cylinder cutting reconstruction of thermal power plant - Google Patents
Flue gas deep waste heat recovery system for cylinder cutting reconstruction of thermal power plant Download PDFInfo
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- CN213901113U CN213901113U CN202022599041.0U CN202022599041U CN213901113U CN 213901113 U CN213901113 U CN 213901113U CN 202022599041 U CN202022599041 U CN 202022599041U CN 213901113 U CN213901113 U CN 213901113U
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- Y—GENERAL 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
A flue gas deep waste heat recovery system for thermal power plant cutting cylinder reconstruction belongs to the field of flue gas waste heat utilization, and aims to solve the problems that a large amount of flue gas waste heat cannot be fully utilized, a large amount of heat loss is caused, and energy waste is caused in a desulfurization flue gas system of the thermal power plant during working, the waste heat recovery system comprises a desulfurizing tower, a flue gas condenser, a GGH cooler, a GGH reheater and a hot-medium water demineralized water heat exchanger, wherein the flue gas side of the GGH cooler is connected in series on an air inlet pipeline of the desulfurizing tower, the flue gas side of the GGH reheater is connected in series on an air outlet pipeline of the desulfurizing tower, the flue gas condenser is arranged between the GGH reheater and the desulfurizing tower, the flue gas side of the flue gas cooler is connected in series on the air outlet pipeline of the desulfurizing tower, a cold end of the hot-medium water demineralized water heat exchanger is connected in series on a condensate pipeline, and the condensate pipeline is communicated with an water inlet end of the deaerator, the utility model discloses mainly used has a large amount of flue gas waste heat to carry out make full use of in the during operation desulfurization flue gas system of thermal power plant.
Description
Technical Field
The utility model belongs to flue gas waste heat utilization field, concretely relates to flue gas degree of depth waste heat recovery system that is used for thermal power plant to cut jar transformation.
Background
With the gradual increase of the heating load in the urban area and the successive closing of small power plants around the city, the demand on the heating capacity of the power plants is more and more increased in the heating season. And a part of power plants are subjected to low-pressure cylinder removal technical transformation on the steam turbine so as to improve the heat supply capacity of the unit. When the unit is subjected to cylinder cutting transformation, a part of steam still enters the low-pressure cylinder to heat the desalted water replenishing water and the low-temperature condensed water.
In addition, a large amount of low-temperature waste heat resources exist in the desulfurization flue gas system, and the low-temperature waste heat resources are directly discharged into the atmosphere through a chimney, so that not only can energy be wasted, but also white smoke can be generated, and the environment is polluted.
Therefore, the flue gas condensing system can heat the desalted water replenishing water and the low-temperature condensed water by using the waste heat in the low-temperature flue gas, fully utilizes the waste heat in the flue gas, saves the steam quantity required by heating the water replenishing water and the condensed water, improves the energy utilization rate of the system, and simultaneously realizes the effect of condensing and eliminating the white smoke gas to meet the actual requirement.
SUMMERY OF THE UTILITY MODEL
The utility model provides a flue gas deep waste heat recovery system for the cylinder cutting reformation of the thermal power plant, which aims to solve the problems that a large amount of flue gas waste heat in a desulfurization flue gas system can not be fully utilized and causes a large amount of heat loss and energy waste when the thermal power plant works;
a flue gas deep waste heat recovery system for cylinder cutting reconstruction of a thermal power plant comprises a desulfurizing tower, a flue gas condenser, a GGH cooler, a GGH reheater and a heat medium water desalted water heat exchanger;
the gas side of the GGH cooler is connected in series with a gas inlet pipeline of a desulfurizing tower, the gas side of the GGH reheater is connected in series with a gas outlet pipeline of the desulfurizing tower, a gas condenser is arranged between the GGH reheater and the desulfurizing tower, the gas side of the gas condenser is connected in series with the gas outlet pipeline of the desulfurizing tower, the cold end of a heat medium water desalted water heat exchanger is connected in series with a condensed water pipeline, and the condensed water pipeline is communicated with the water inlet end of a deaerator;
the water inlet end of the GGH cooler is divided into two branches, one branch is connected with the water outlet end of the GGH reheater through a pipeline, the other branch is connected with the water outlet end of the heating medium water desalted water heat exchanger through a pipeline, the water outlet end of the GGH cooler is divided into two branches, one branch is connected with the water inlet end of the GGH reheater through a pipeline, the other branch is connected with the water inlet end of the heating medium water desalted water heat exchanger through a pipeline, and the water inlet end and the water outlet end of the flue gas condenser are respectively communicated with the desalted water pipeline;
furthermore, a desalted water booster pump is connected in series with a desalted water replenishing pipe at the water inlet end of the flue gas condenser;
furthermore, the waste heat recovery system also comprises a flue gas condensate water tank, the flue gas condensate water tank is communicated with a condensate water outlet end of the flue gas condenser through a pipeline, and a flue gas condensate water pump is connected in series on the pipeline between the flue gas condensate water tank and the flue gas condenser;
furthermore, a hot medium water feeding box, a hot medium water replenishing box and a hot medium water circulating pump are sequentially connected in series on a pipeline between the water inlet end of the GGH cooler and the water outlet end of the GGH reheater along the flow direction of water;
further, the flue gas condenser is a titanium tube flue gas condenser;
compared with the prior art, the utility model following beneficial effect has:
1. the utility model provides a flue gas degree of depth waste heat recovery system that is used for thermal power plant to cut jar to reform transform, this system can have a large amount of flue gas waste heat to heat low temperature demineralized water and condensate water among the make full use of thermal power plant during operation desulfurization flue gas system, and remaining waste heat in the effectual flue gas that has utilized has avoided the waste of the energy.
2. The utility model provides a flue gas degree of depth waste heat recovery system that is used for thermal power plant to cut jar to reform transform, this system is through utilizing to have a large amount of flue gas waste heat to heat low temperature demineralized water and condensate water among the desulfurization flue gas system, has reduced the consumption of the high temperature steam that carries out the heating to low temperature demineralized water and condensate water, has improved the utilization efficiency of steam.
3. The utility model provides a flue gas degree of depth waste heat recovery system that is used for thermal power plant to cut jar to reform transform, this system heats low temperature demineralized water and condensate water through utilizing to have a large amount of flue gas waste heat in the desulfurization flue gas system, has reduced the temperature of desulfurization flue gas system exhaust flue gas to can disappear whitely to the exhaust flue gas along with the loss of exhaust flue gas temperature, reduced the destruction of afterbody flue gas to the environment, make thermal power plant exhaust flue gas have the feature of environmental protection more.
Drawings
FIG. 1 is a schematic view of a connection system of the present invention;
the system comprises a desulfurizing tower 1, a flue gas condenser 2, a 3GGH cooler, a 4GGH reheater, a hot medium water desalted water heat exchanger 5, a desalted water booster pump 6, a flue gas condensate water tank 7, a hot medium water dosing tank 8, a hot medium water replenishing tank 9, a hot medium water circulating pump 10 and a flue gas condensate water pump 11.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and provides a flue gas deep waste heat recovery system for cylinder cutting reconstruction of a thermal power plant, wherein the waste heat recovery system comprises a desulfurizing tower 1, a flue gas condenser 2, a GGH cooler 3, a GGH reheater 4 and a hot water desalted water heat exchanger 5;
the flue gas side of the GGH cooler 3 is connected in series with the gas inlet pipeline of the desulfurizing tower 1, the flue gas side of the GGH reheater 4 is connected in series with the gas outlet pipeline of the desulfurizing tower 1, the flue gas condenser 2 is arranged between the GGH reheater 4 and the desulfurizing tower 1, the flue gas side of the flue gas condenser 2 is connected in series with the gas outlet pipeline of the desulfurizing tower 1, the cold end of the heat medium water desalted water heat exchanger 5 is connected in series with a condensed water pipeline, and the condensed water pipeline is communicated with the water inlet end of the deaerator;
the water inlet end of the GGH cooler 3 is divided into two branches, one branch is connected with the water outlet end of the GGH reheater 4 through a pipeline, the other branch is connected with the water outlet end of the heat medium water desalted water heat exchanger through a pipeline, the water outlet end of the GGH cooler 3 is divided into two branches, one branch is connected with the water inlet end of the GGH reheater 4 through a pipeline, the other branch is connected with the water inlet end of the heat medium water desalted water heat exchanger 5 through a pipeline, and the water inlet end and the water outlet end of the flue gas condenser 2 are respectively connected with a desalted water pipeline.
The utility model provides a flue gas degree of depth waste heat recovery system that is used for thermal power plant to cut jar transformation, this system can have a large amount of flue gas waste heat to low temperature demineralized water and condensate water in the during operation desulfurization flue gas system of make full use of thermal power plant and heat, remaining waste heat in the effectual flue gas that has utilized, the waste of the energy has been avoided, reduced simultaneously and heated all high-temperature steam quantity to low temperature demineralized water and condensate water, the utilization efficiency of steam has been improved, still reduced the temperature of desulfurization flue gas system exhaust flue gas, and can disappear white to the exhaust flue gas along with the loss of exhaust flue gas temperature, the destruction of afterbody flue gas to the environment has been reduced, make thermal power plant exhaust flue gas have the feature of environmental protection more, GGH is the gas heat exchanger overall name.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 1, and the present embodiment further defines the flue gas condenser 2 described in the first embodiment, and in the present embodiment, a demineralized water pressure-increasing pump 6 is connected in series to the demineralized water replenishing pipe at the water inlet end of the flue gas condenser 2. Other components and connection modes are the same as those of the first embodiment.
So set up, guarantee that the demineralized water can enter into flue gas condenser 2 along the demineralized water moisturizing pipe.
The third concrete implementation mode: referring to fig. 1, this embodiment is described, and the present embodiment further defines the waste heat recovery system according to the second embodiment, and in this embodiment, the waste heat recovery system further includes a flue gas condensate water tank 7, the flue gas condensate water tank 7 is communicated with a condensate water outlet end of the flue gas condenser 2 through a pipeline, and a flue gas condensate water pump 11 is connected in series on the pipeline between the flue gas condensate water tank 7 and the flue gas condenser 2. The other components and the connection mode are the same as those of the second embodiment.
So set up, by flue gas condensate water tank 7, flue gas condensate water pump 11 constitutes flue gas condensate water discharge system for collect flue gas condenser's condensate water.
The fourth concrete implementation mode: in the present embodiment, a heating medium tank 8, a heating medium supply tank 9, and a heating medium circulation pump 10 are connected in series in the flow direction in this order in the pipe between the water inlet end of the GGH cooler 3 and the water outlet end of the GGH reheater 4. Other components and connection modes are the same as those of the third embodiment.
So set up, utilize GGH cooler 3, heat medium water circulating pump 10, heat medium water make-up tank 9, heat medium water dosing tank 8, GGH reheater 4 constitution MGGH system for extract the heat in the flue gas before the desulfurizing tower, improve desulfurizing tower operation effect simultaneously and to afterbody flue gas heating white elimination.
The fifth concrete implementation mode: the present embodiment will be described with reference to fig. 1, and the present embodiment further defines the flue gas cooler 2 according to the fourth embodiment, and in the present embodiment, the flue gas cooler 2 is a titanium pipe flue gas condenser. The other components and the connection mode are the same as those of the fourth embodiment.
Principle of operation
The utility model discloses at the during operation at first assemble into a stable system with each part according to the content of specifically implementing description in one to the concrete implementation five, wherein GGH cooler 3 draws the heat in the flue gas before the desulfurizing tower and gives hot media water, partly hot media water is carried to GGH reheater 4 through hot media water circulating pump for afterbody flue gas disappears and whitely, another part hot media water is carried to hot media water demineralized water heat exchanger 5 through hot media water circulating pump 10, the condensate temperature that the heating condensate water improves and gets into the oxygen-eliminating device. The flue gas condenser 2 extracts heat from low-temperature flue gas behind the desulfurizing tower, heats demineralized water for water supplement, improves water supplement temperature, makes water supplement temperature exceed the saturation temperature in the condenser, effectively carries out the deoxidization to the moisturizing.
Claims (5)
1. The utility model provides a flue gas degree of depth waste heat recovery system for thermal power plant cuts jar transformation which characterized in that: the waste heat recovery system comprises a desulfurizing tower (1), a flue gas condenser (2), a GGH cooler (3), a GGH reheater (4) and a heat medium water desalted water heat exchanger (5);
the gas side of the GGH cooler (3) is connected in series on a gas inlet pipeline of the desulfurizing tower (1), the gas side of the GGH reheater (4) is connected in series on a gas outlet pipeline of the desulfurizing tower (1), the gas condenser (2) is arranged between the GGH reheater (4) and the desulfurizing tower (1), the gas side of the gas condenser (2) is connected in series on the gas outlet pipeline of the desulfurizing tower (1), the cold end of the hot medium water demineralized water heat exchanger (5) is connected in series on a condensed water pipeline, and the condensed water pipeline is communicated with the water inlet end of the deaerator;
the utility model discloses a heating medium water supply system, including GGH cooler (3), the end of intaking of GGH cooler (3) divide into two branches, one of them branch road passes through the outlet end of pipeline with GGH reheater (4) and links to each other, another branch road passes through the heat medium water outlet end of pipeline with heat medium water demineralized water heat exchanger (5) and links to each other, the outlet end of GGH cooler (3) divide into two branches, one of them branch road passes through the pipeline and links to each other with the end of intaking of GGH reheater (4), another branch road passes through the pipeline and links to each other with the heat medium water inlet end of heat medium water demineralized water heat exchanger (5), the income of flue gas condenser (2) and go out the.
2. The flue gas deep waste heat recovery system for thermal power plant cylinder cutting reconstruction as claimed in claim 1, wherein: and a demineralized water booster pump (6) is connected in series on the demineralized water replenishing pipe at the water inlet end of the flue gas condenser (2).
3. The flue gas deep waste heat recovery system for thermal power plant cylinder cutting reconstruction as claimed in claim 2, wherein: the waste heat recovery system further comprises a flue gas condensate water tank (7), the flue gas condensate water tank (7) is communicated with a condensate water outlet end of the flue gas condenser (2) through a pipeline, and a flue gas condensate water pump (11) is connected in series on the pipeline between the flue gas condensate water tank (7) and the flue gas condenser (2).
4. The flue gas deep waste heat recovery system for thermal power plant cylinder cutting reconstruction as claimed in claim 3, wherein: a heating medium water feeding box (8), a heating medium water replenishing box (9) and a heating medium water circulating pump (10) are sequentially connected in series on a pipeline between the water inlet end of the GGH cooler (3) and the water outlet end of the GGH reheater (4) along the water flow direction.
5. The flue gas deep waste heat recovery system for thermal power plant cylinder cutting reconstruction as claimed in claim 4, wherein: the flue gas condenser (2) is a titanium pipe flue gas condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022599041.0U CN213901113U (en) | 2020-11-11 | 2020-11-11 | Flue gas deep waste heat recovery system for cylinder cutting reconstruction of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022599041.0U CN213901113U (en) | 2020-11-11 | 2020-11-11 | Flue gas deep waste heat recovery system for cylinder cutting reconstruction of thermal power plant |
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| CN213901113U true CN213901113U (en) | 2021-08-06 |
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| CN202022599041.0U Active CN213901113U (en) | 2020-11-11 | 2020-11-11 | Flue gas deep waste heat recovery system for cylinder cutting reconstruction of thermal power plant |
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