CN213480340U - Steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization equipment - Google Patents
Steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization equipment Download PDFInfo
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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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- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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Abstract
The utility model discloses a gas-steam combined cycle exhaust-heat boiler flue gas waste heat utilization equipment of power plant belongs to the technical field that the boiler flue of discharging fume reforms transform. The system comprises a boiler smoke exhaust flue, a smoke-hot water heat exchanger and a primary network circulating pipeline; the flue gas-hot water heat exchanger is arranged at the tail end of a boiler smoke exhaust flue; the primary network circulating pipeline comprises a power plant heat supply end, a unit heat network heat exchanger water inlet pipeline, a unit heat network heat exchanger and a unit heat network heat exchanger water outlet pipeline; the water inlet pipeline of the flue gas-hot water heat exchanger is connected with the water inlet pipeline of the heat supply network heat exchanger of the unit, and the water outlet pipeline of the flue gas-hot water heat exchanger is connected with the water outlet pipeline of the heat supply network heat exchanger of the unit. The problem of the waste of energy that the exhaust gas temperature of the waste heat boiler of the gas-steam combined cycle power plant is high is solved. The flue gas-hot water heat exchanger of the utility model is connected with a primary network circulation pipeline, and can fully utilize the waste heat of boiler exhaust smoke, save energy and reduce emission.
Description
Technical Field
The utility model relates to a technical field that the boiler flue of discharging fume reforms transform, specific gas-steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization equipment that relates to.
Background
The aeroderivative gas-steam combined cycle unit utilizes high-temperature flue gas discharged after combustion of a gas turbine, the rated exhaust temperature is 447 ℃ at the moment, water in a waste heat boiler is heated, high-pressure and low-pressure steam is produced in a heat transfer mode to drive the steam turbine to do work, and finally, the flue gas after heat exchange is discharged into the atmosphere through a boiler chimney.
In the prior art, according to the analysis of the running condition of the unit, when the rated exhaust temperature of the gas turbine is 447 ℃, the finally discharged flue gas temperature is about 90 ℃ after heat exchange of the flue gas by waste heat equipment such as a high-pressure superheater, a high-pressure evaporator, a high-pressure economizer, a low-pressure superheater, a low-pressure evaporator, a low-pressure expanded economizer and the like, the flue gas flow rate under the designed load of the unit is 133kg/s and about 480t/h, and therefore the tail flue gas of the boiler still has great heat. In recent years, a series of energy-saving and emission-reducing measures are provided in China, and in order to respond to the call of the country, the situation that the heat utilization space still exists when the flue gas waste heat of a gas-steam combined cycle unit is about 90 ℃ is considered, and the heat is directly discharged into the atmosphere, so that the energy is wasted.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization equipment to solve and exist among the prior art, flue gas in the boiler chimney is after the exhaust-heat equipment heat transfer, and the flue gas temperature of emission is high, causes the extravagant technical problem of the energy.
The utility model provides a waste heat boiler flue gas waste heat utilization device of a steam combined cycle power plant, which comprises a boiler smoke exhaust flue, a flue gas-hot water heat exchanger and a primary net circulation pipeline;
the flue gas-hot water heat exchanger is connected to the tail end of a boiler smoke exhaust flue;
the primary network circulation pipeline comprises a power plant heat supply end, a unit heat network heat exchanger water inlet pipeline, a unit heat network heat exchanger and a unit heat network heat exchanger water outlet pipeline, wherein the water inlet end of the unit heat network heat exchanger water inlet pipeline is connected with the power plant heat supply end, the water outlet end of the unit heat network heat exchanger water inlet pipeline is connected with the unit heat network heat exchanger, the water inlet end of the unit heat network heat exchanger water outlet pipeline is connected with the unit heat network heat exchanger, and the water outlet end of the unit heat network heat exchanger water outlet pipeline is connected with the power plant heat supply end;
the water inlet pipeline of the flue gas-hot water heat exchanger is connected with the water inlet pipeline of the heat supply network heat exchanger of the unit, and the water outlet pipeline of the flue gas-hot water heat exchanger is connected with the water outlet pipeline of the heat supply network heat exchanger of the unit.
Further, a first valve is connected to a water inlet pipeline of the flue gas-hot water heat exchanger;
and the water outlet pipeline of the flue gas-hot water heat exchanger is connected with a second valve.
Further, a first flowmeter is connected to a water inlet pipeline of the flue gas-hot water heat exchanger;
and the water outlet pipeline of the flue gas-hot water heat exchanger is connected with a second flow meter.
Further, a sewage discharge end of the flue gas-hot water heat exchanger is connected with a sewage discharge pipeline;
the tail end of the sewage discharge pipeline is connected with a sewage discharge tank.
Furthermore, a third valve is connected to the sewage pipeline.
Further, a fourth valve is connected to a water inlet pipeline of the heat exchanger of the unit heat supply network;
and a fifth valve is connected to the water outlet pipeline of the heat exchanger of the heat supply network of the unit.
Further, a water inlet pipeline of the unit heat supply network heat exchanger is connected with a first circulating pump and a first pump valve;
and a first check valve is connected to the water inlet pipeline of the heat exchanger of the heat supply network of the unit.
The utility model also provides a device for utilizing the waste heat of the flue gas of the waste heat boiler of the steam combined cycle power plant, which comprises a boiler smoke exhaust flue, a flue gas-hot water heat exchanger, a primary net circulation pipeline and a hot water circulation pipeline;
the flue gas-hot water heat exchanger is connected to the tail end of a boiler smoke exhaust flue;
the primary network circulation pipeline comprises a power plant heat supply end, a unit heat network heat exchanger water inlet pipeline, a unit heat network heat exchanger and a unit heat network heat exchanger water outlet pipeline, wherein the water inlet end of the unit heat network heat exchanger water inlet pipeline is connected with the power plant heat supply end, the water outlet end of the unit heat network heat exchanger water inlet pipeline is connected with the unit heat network heat exchanger, the water inlet end of the unit heat network heat exchanger water outlet pipeline is connected with the unit heat network heat exchanger, and the water outlet end of the unit heat network heat exchanger water outlet pipeline is connected with the power plant heat supply end;
the hot water circulation pipeline comprises a water tank, a hot water inlet pipeline and a hot water outlet pipeline, wherein the water inlet end of the hot water inlet pipeline is connected with the water tank, the water outlet end of the hot water inlet pipeline is connected with the water inlet pipeline of the flue gas-hot water heat exchanger, the water inlet end of the hot water outlet pipeline is connected with the water outlet pipeline of the flue gas-hot water heat exchanger, and the water outlet end of the hot water outlet pipeline is connected with;
the water inlet pipeline and the hot water inlet pipeline of the unit heat supply network heat exchanger are connected in parallel on the water inlet pipeline of the flue gas-hot water heat exchanger, and the water outlet pipeline and the hot water outlet pipeline of the unit heat supply network heat exchanger are connected in parallel on the water outlet pipeline of the flue gas-hot water heat exchanger.
Further, the water tank is connected with a water replenishing pipeline;
the hot water inlet pipeline is connected with a second circulating pump and a second pump valve;
the hot water inlet pipeline is connected with a second check valve.
Furthermore, a water discharge pipeline is connected to the hot water inlet pipeline, and a sixth valve is connected to the water discharge pipeline.
Compared with the prior art, the utility model discloses a gas-steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization equipment has following advantage:
the flue gas-hot water heat exchanger of the utility model is connected with the end of the boiler smoke exhaust flue so as to directly utilize the flue gas-hot water heat exchanger to utilize the heat at the end of the boiler smoke exhaust flue; the water inlet end of a water inlet pipeline of the unit heat supply network heat exchanger is connected with a heat supply end of a power plant, the water outlet end of a water inlet pipeline of the unit heat supply network heat exchanger is connected with the unit heat supply network heat exchanger, the water inlet end of a water outlet pipeline of the unit heat supply network heat exchanger is connected with the unit heat supply network heat exchanger, and the water outlet end of the water outlet pipeline of the unit heat supply network heat exchanger is connected with the heat supply end of the power plant to; a water inlet pipeline of the flue gas-hot water heat exchanger is connected with a water inlet pipeline of a heat supply network heat exchanger of the unit, and a water outlet pipeline of the flue gas-hot water heat exchanger is connected with a water outlet pipeline of the heat supply network heat exchanger of the unit, so that the flue gas-hot water heat exchanger can supply heat for a primary network circulation pipeline; the tail end of the boiler smoke exhaust flue is cooled to about 60 ℃ by using a smoke-hot water heat exchanger, and then the smoke is supplied to a primary network circulating pipeline to absorb and utilize the gas at the tail end of the boiler smoke exhaust flue, so that the aim of fully utilizing energy sources by saving energy and reducing emission is fulfilled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic connection diagram of a flue gas-hot water heat exchanger for supplying heat to a primary network circulation pipeline according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of the flue gas-hot water heat exchanger simultaneously supplying heat to the primary network circulation pipeline and the hot water circulation pipeline according to the embodiment of the present invention;
fig. 3 is a schematic connection diagram of the flue gas-hot water heat exchanger provided by the embodiment of the present invention for supplying heat to a hot water circulation pipeline.
Description of reference numerals:
100-a boiler smoke exhaust flue; 200-flue gas-hot water heat exchanger;
300-primary net circulation pipeline; 400-hot water circulation line;
201-inlet pipe of flue gas-hot water heat exchanger; 202-flue gas-hot water heat exchanger water outlet pipeline;
203-a first valve; 204-a second valve;
205-a first flow meter; 206-a second flow meter;
207-sewage pipes; 208-a sewage draining tank;
209-a third valve; 301-power plant heat supply end;
302-water inlet pipeline of heat exchanger of heat supply network of unit; 303-unit heat supply network heat exchanger;
304-unit heat supply network heat exchanger water outlet pipe; 305-a fourth valve;
306-a fifth valve; 307-first circulation pump;
308-a first pump valve; 309-a first check valve;
401-a water tank; 402-hot water inlet pipe;
403-hot water outlet pipe; 404-a water replenishing pipeline;
405-a second circulation pump; 406-a second pump valve;
407-a second check valve; 408-a water discharge pipe;
409-sixth valve.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, the device for utilizing the flue gas waste heat of the waste heat boiler of the steam combined cycle power plant provided by the present invention comprises a boiler smoke exhaust flue 100, a flue gas-hot water heat exchanger 200 and a primary network circulation pipeline 300;
the flue gas-hot water heat exchanger 200 is connected to the tail end of the boiler smoke exhaust flue 100;
the primary network circulating pipeline 300 comprises a power plant heat supply end 301, a unit heat network heat exchanger water inlet pipeline 302, a unit heat network heat exchanger 303 and a unit heat network heat exchanger water outlet pipeline 304, wherein the water inlet end of the unit heat network heat exchanger water inlet pipeline 302 is connected with the power plant heat supply end 301, the water outlet end of the unit heat network heat exchanger water inlet pipeline 302 is connected with the unit heat network heat exchanger 303, the water inlet end of the unit heat network heat exchanger water outlet pipeline 304 is connected with the unit heat network heat exchanger 303, and the water outlet end of the unit heat network heat exchanger water outlet pipeline 304 is connected with the power plant heat supply end 301;
the inlet pipe 201 of the flue gas-hot water heat exchanger 200 is connected with the inlet pipe 302 of the unit heat supply network heat exchanger, and the outlet pipe 202 of the flue gas-hot water heat exchanger 200 is connected with the outlet pipe 304 of the unit heat supply network heat exchanger.
In this embodiment, the flue gas-to-hot water heat exchanger 200 is a 3.6MW flue gas heat exchanger. The flue gas-hot water heat exchanger 200 is connected with a primary network circulating pipeline 300, waste heat in flue gas is recovered through a heat exchange principle, and hot water after heat exchange is mixed with water heated by the original heat supply network backwater through the unit heat supply network heat exchanger 303 and then is supplied to a power plant for heat supply. The smoke temperature of 90 ℃ is reduced to 60 ℃, and 100t of hot water can be expected to be heated. The heated hot water can be directly merged into a primary heat supply network for heat supply, and the energy is fully utilized.
When the heat exchanger is used specifically, under full load of a combustion engine, the fluctuation influence of the exhaust temperature of the combustion engine is considered, benefit analysis is carried out according to the exhaust temperature of the combustion engine of 85 ℃, after the heat exchanger is put into operation, the exhaust temperature can be reduced to 60 ℃, the flow rate of the exhaust gas is 480t/h, only 70% of load can be carried according to the current operation condition in winter, and the flow rate of the exhaust gas is about 390 t/h. The water supply and return of the existing heat supply network is 80/50 ℃, the specific heat capacity of the flue gas at the constant pressure is 1.09kj/kgK, and the recoverable heat of the flue gas is 3600kW by calculation according to the data. The scaling factors for GJ and KWH are 277.78.
Annual heat recovery:
390000×(85-60)×1.09÷3600×2880h÷277.78＝30607GJ
the heating season recovers heat 36723 GJ. Heatable heat grid water flow rate was about per hour: 101.2 t/h. According to the calculation of the current wholesale price of 40 yuan/GJ, if the design is adopted, the waste heat of the flue gas of the waste heat boiler is deeply utilized,
and (3) a heat price calculation method:
according to the heating wholesale price of 40 yuan/red coke of a certain company, the annual recovered heat is 30607GJ, so the economic benefit can be created in the heating season as follows:
40 x 30607 ═ 122.43 ten thousand yuan
Therefore, the economic benefit created by one hot season is 122.43 ten thousand yuan.
The heat supply capacity can be increased by recycling the flue gas, if the heat recovery boiler is adopted, the flue gas waste heat of the waste heat boiler is deeply utilized, and the heat recovery index of the residences in Tianjin city is 40W/m2The heat supply area can be increased by 8.9 ten thousand meters by calculation2. Meanwhile, the heat supply cost can be reduced, and the economical efficiency is good.
The above-mentioned connection structure of this application improves heat supply capacity and both increased the heat supply area of power plant, reduces the heat supply cost, for power plant's operation earning, energy make full use of improves energy utilization and rates, responds national energy saving and emission reduction call.
Further, a first valve 203 is connected to the water inlet pipe 201 of the flue gas-hot water heat exchanger;
the outlet pipe 202 of the flue gas-hot water heat exchanger is connected with a second valve 204.
As shown in fig. 1, the first valve 203 controls the water inlet end of the water inlet pipe 201 of the flue gas-hot water heat exchanger, and the second valve 204 controls the water outlet end of the water outlet pipe 202 of the flue gas-hot water heat exchanger. The first valve 203 and the second valve 204 are electrically operated valves, and may be manually operated valves.
Further, a first flow meter 205 is connected to the water inlet pipe 201 of the flue gas-hot water heat exchanger;
the water outlet pipe 202 of the flue gas-hot water heat exchanger is connected with a second flow meter 206.
As shown in fig. 1, the first flow meter 205 counts the flow rate of water entering the inlet pipe 201 of the flue gas-hot water heat exchanger, and the second flow meter 206 counts the flow rate of water flowing out of the outlet pipe 202 of the flue gas-hot water heat exchanger, so as to facilitate the supervision and calculation of data by operators.
Further, the sewage discharge end of the flue gas-hot water heat exchanger 200 is connected with a sewage discharge pipeline 207;
the end of the sewage conduit 207 is connected to a sewage tank 208.
Further, a third valve 209 is connected to the drain line 207.
As shown in fig. 1, a third valve 209 is arranged at the lower end of the flue gas-hot water heat exchanger 200, and the third valve 209 may be an electric valve or a manual valve; when the amount of sewage in the flue gas-hot water heat exchanger 200 is large, the third valve 209 can be opened to discharge the sewage; the tail end of the sewage discharge pipeline 207 is connected with a sewage discharge tank 208 to collect sewage and avoid causing environmental pollution.
Further, a fourth valve 305 is connected to the water inlet pipeline 302 of the unit heat supply network heat exchanger;
and a fifth valve 306 is connected to the outlet pipe 304 of the unit heat supply network heat exchanger.
As shown in fig. 1, the fourth valve 305 controls the water inlet end of the unit heat supply network heat exchanger water inlet pipe 302, the fifth valve 306 controls the water outlet end of the unit heat supply network heat exchanger water outlet pipe 304, and both the fourth valve 305 and the fifth valve 306 are electrically operated valves or manually operated valves.
Further, a first circulating pump 307 and a first pump valve 308 are connected to the unit heat supply network heat exchanger water inlet pipeline 302;
the unit heat supply network heat exchanger water inlet pipe 302 is connected with a first check valve 309.
As shown in fig. 1, the first circulation pump 307 can make the water supply in the unit heat supply network heat exchanger water inlet pipe 302 sufficient, and the first pump valve 308 controls the on and off of the first circulation pump 307; the first check valve 309 prevents backflow of water in the unit heat network heat exchanger water inlet pipe 302.
As shown in fig. 2, the utility model also provides a gas-steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization device, which comprises a boiler exhaust flue 100, a flue gas-hot water heat exchanger 200, a primary net circulation pipeline 300 and a hot water circulation pipeline 400;
the flue gas-hot water heat exchanger 200 is connected to the tail end of the boiler smoke exhaust flue 100;
the primary network circulating pipeline 300 comprises a power plant heat supply end 301, a unit heat network heat exchanger water inlet pipeline 302, a unit heat network heat exchanger 303 and a unit heat network heat exchanger water outlet pipeline 304, wherein the water inlet end of the unit heat network heat exchanger water inlet pipeline 302 is connected with the power plant heat supply end 301, the water outlet end of the unit heat network heat exchanger water inlet pipeline 302 is connected with the unit heat network heat exchanger 303, the water inlet end of the unit heat network heat exchanger water outlet pipeline 304 is connected with the unit heat network heat exchanger 303, and the water outlet end of the unit heat network heat exchanger water outlet pipeline 304 is connected with the power plant heat supply end 301;
the hot water circulation pipeline 400 comprises a water tank 401, a hot water inlet pipeline 402 and a hot water outlet pipeline 403, wherein the water inlet end of the hot water inlet pipeline 402 is connected with the water tank 401, the water outlet end of the hot water inlet pipeline 402 is connected with the water inlet pipeline 201 of the flue gas-hot water heat exchanger 200, the water inlet end of the hot water outlet pipeline 403 is connected with the water outlet pipeline 202 of the flue gas-hot water heat exchanger 200, and the water outlet end of the hot water outlet pipeline 403 is connected with the water tank 401;
the unit heat supply network heat exchanger water inlet pipeline 302 and the hot water inlet pipeline 402 are connected in parallel to the flue gas-hot water heat exchanger water inlet pipeline 201 of the flue gas-hot water heat exchanger 200, and the unit heat supply network heat exchanger water outlet pipeline 304 and the hot water outlet pipeline 403 are connected in parallel to the flue gas-hot water heat exchanger water outlet pipeline 202 of the flue gas-hot water heat exchanger 200.
In the present embodiment, the primary mesh circulation line 300 and the hot water circulation line 400 are connected in parallel to the pipe of the flue gas-hot water heat exchanger 200, so that the flue gas-hot water heat exchanger 200 can supply heat to the primary mesh circulation line 300 and the hot water circulation line 400 at the same time.
As shown in fig. 3, when the primary network circulation pipeline 300 does not need to supply heat, only the hot water circulation pipeline 400 can be opened, so that the flue gas-hot water heat exchanger 200 supplies heat to the hot water circulation pipeline 400.
When the hot water circulation pipeline 400 does not need to supply heat, only the primary network circulation pipeline 300 can be opened, so that the flue gas-hot water heat exchanger 200 supplies heat for the primary network circulation pipeline 300.
When the primary network circulation pipeline 300 and the hot water circulation pipeline 400 both need to supply heat, the primary network circulation pipeline 300 and the hot water circulation pipeline 400 can be opened at the same time, so that the flue gas-hot water heat exchanger 200 simultaneously supplies heat to the primary network circulation pipeline 300 and the hot water circulation pipeline 400.
Starting valves are arranged on the hot water inlet pipeline 402 and the hot water outlet pipeline 403, so that the water inlet end and the water outlet end can be conveniently controlled.
In particular embodiments, the hot water circulation circuit 400 may also be replaced by a domestic or small industrial heat network in the plant, for example: hot water in a bathing pool, etc.
According to the connection structure, the flue gas waste heat of the boiler can conform to the national policy, energy conservation and emission reduction are achieved, and social benefits and environmental protection benefits are very obvious.
In this embodiment, the flue gas-hot water heat exchanger 200 can supply heat to the primary grid circulation pipeline 300 and the hot water circulation pipeline 400 at the same time, the waste heat of flue gas at the tail end of a smoke exhaust flue of a boiler can be utilized all the year round to heat a water source in the hot water circulation pipeline, the heated water can be used for bathing room water, industrial water and the like, and when the device is used specifically, 100 tons of water in the hot water circulation pipeline can be heated to 85 ℃ from 10 ℃ per hour, and 2400 yuan can be sold according to the unit price of hot water in a bath pool of 24 yuan per ton per hour, so that energy can be fully utilized by energy conservation and emission reduction, and revenue can be created in the.
Further, the water tank 401 is connected with a water replenishing pipeline 404;
a second circulating pump 405 and a second pump valve 406 are connected to the hot water inlet pipe 402;
a second check valve 407 is connected to the hot water inlet pipe 402.
As shown in fig. 3, in the embodiment of the present invention, the outer end of the water replenishing pipeline 404 is connected to an external water pipe, so that when the external water pipe is opened, water can be replenished to the water tank 401 through the water replenishing pipeline 404; a valve is connected to the water replenishing pipe 404 to control the water inflow.
The second circulation pump 405 enables the circulation of the water volume inside the hot water inlet pipe 402; the second pump valve 406 can control the opening and closing of the second circulation pump 405.
The second check valve 407 can prevent the reverse flow of water in the hot water inlet pipe 402.
Furthermore, a water discharge pipe 408 is connected to the hot water inlet pipe 402, and a sixth valve 409 is connected to the water discharge pipe 408.
As shown in fig. 3, a thermometer may be further installed on the hot water inlet pipe 402, and when the temperature of the water in the hot water inlet pipe 402 meets the use requirement, the sixth valve 409 is opened, and a waterwheel is placed at the end of the water discharge pipe 408 to discharge the hot water in the hot water inlet pipe 402, and then the hot water is fully utilized.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A flue gas waste heat utilization device of a waste heat boiler of a steam combined cycle power plant is characterized by comprising a boiler smoke exhaust flue (100), a flue gas-hot water heat exchanger (200) and a primary net circulation pipeline (300);
the flue gas-hot water heat exchanger (200) is connected to the tail end of the boiler smoke exhaust flue (100);
the primary network circulating pipeline (300) comprises a power plant heat supply end (301), a unit heat network heat exchanger water inlet pipeline (302), a unit heat network heat exchanger (303) and a unit heat network heat exchanger water outlet pipeline (304), wherein the water inlet end of the unit heat network heat exchanger water inlet pipeline (302) is connected with the power plant heat supply end (301), the water outlet end of the unit heat network heat exchanger water inlet pipeline (302) is connected with the unit heat network heat exchanger (303), the water inlet end of the unit heat network heat exchanger water outlet pipeline (304) is connected with the unit heat network heat exchanger (303), and the water outlet end of the unit heat network heat exchanger water outlet pipeline (304) is connected with the power plant heat supply end (301);
a flue gas-hot water heat exchanger water inlet pipeline (201) of the flue gas-hot water heat exchanger (200) is connected with the unit heat supply network heat exchanger water inlet pipeline (302), and a flue gas-hot water heat exchanger water outlet pipeline (202) of the flue gas-hot water heat exchanger (200) is connected with the unit heat supply network heat exchanger water outlet pipeline (304).
2. The flue gas waste heat utilization device of the waste heat boiler of the steam combined cycle power plant as claimed in claim 1, wherein a first valve (203) is connected to the inlet pipe (201) of the flue gas-hot water heat exchanger;
and a second valve (204) is connected to the water outlet pipeline (202) of the flue gas-hot water heat exchanger.
3. The device for utilizing the flue gas waste heat of the waste heat boiler of the steam combined cycle power plant as claimed in claim 1, wherein a first flow meter (205) is connected to the inlet pipe (201) of the flue gas-hot water heat exchanger;
and a second flow meter (206) is connected to the water outlet pipeline (202) of the flue gas-hot water heat exchanger.
4. The flue gas waste heat utilization device of the waste heat boiler of the steam combined cycle power plant as claimed in claim 1, wherein a sewage discharge end of the flue gas-hot water heat exchanger (200) is connected with a sewage discharge pipeline (207);
the tail end of the sewage discharge pipeline (207) is connected with a sewage discharge tank (208).
5. The flue gas waste heat utilization device of the waste heat boiler of the steam combined cycle power plant as claimed in claim 4, characterized in that a third valve (209) is connected to the sewage discharge pipeline (207).
6. The flue gas waste heat utilization device of the waste heat boiler of the steam combined cycle power plant as claimed in claim 1, wherein a fourth valve (305) is connected to a water inlet pipeline (302) of the unit heat network heat exchanger;
and a fifth valve (306) is connected to the water outlet pipeline (304) of the unit heat supply network heat exchanger.
7. The flue gas waste heat utilization device of the waste heat boiler of the steam combined cycle power plant as claimed in claim 1, wherein a first circulating pump (307) and a first pump valve (308) are connected to the water inlet pipeline (302) of the unit heat network heat exchanger;
and a first check valve (309) is connected to the water inlet pipeline (302) of the unit heat supply network heat exchanger.
8. A flue gas waste heat utilization device of a waste heat boiler of a steam combined cycle power plant is characterized by comprising a boiler smoke exhaust flue (100), a flue gas-hot water heat exchanger (200), a primary net circulation pipeline (300) and a hot water circulation pipeline (400);
the flue gas-hot water heat exchanger (200) is connected to the tail end of the boiler smoke exhaust flue (100);
the primary network circulating pipeline (300) comprises a power plant heat supply end (301), a unit heat network heat exchanger water inlet pipeline (302), a unit heat network heat exchanger (303) and a unit heat network heat exchanger water outlet pipeline (304), wherein the water inlet end of the unit heat network heat exchanger water inlet pipeline (302) is connected with the power plant heat supply end (301), the water outlet end of the unit heat network heat exchanger water inlet pipeline (302) is connected with the unit heat network heat exchanger (303), the water inlet end of the unit heat network heat exchanger water outlet pipeline (304) is connected with the unit heat network heat exchanger (303), and the water outlet end of the unit heat network heat exchanger water outlet pipeline (304) is connected with the power plant heat supply end (301);
the hot water circulation pipeline (400) comprises a water tank (401), a hot water inlet pipeline (402) and a hot water outlet pipeline (403), the water inlet end of the hot water inlet pipeline (402) is connected with the water tank (401), the water outlet end of the hot water inlet pipeline (402) is connected with the water inlet pipeline (201) of the flue gas-hot water heat exchanger (200), the water inlet end of the hot water outlet pipeline (403) is connected with the water outlet pipeline (202) of the flue gas-hot water heat exchanger (200), and the water outlet end of the hot water outlet pipeline (403) is connected with the water tank (401);
the unit heat supply network heat exchanger water inlet pipeline (302) and the hot water inlet pipeline (402) are connected in parallel to a flue gas-hot water heat exchanger water inlet pipeline (201) of the flue gas-hot water heat exchanger (200), and the unit heat supply network heat exchanger water outlet pipeline (304) and the hot water outlet pipeline (403) are connected in parallel to a flue gas-hot water heat exchanger water outlet pipeline (202) of the flue gas-hot water heat exchanger (200).
9. The steam combined cycle power plant waste heat boiler flue gas waste heat utilization device as claimed in claim 8, characterized in that the water tank (401) is connected with a water replenishing pipeline (404);
a second circulating pump (405) and a second pump valve (406) are connected to the hot water inlet pipeline (402);
the hot water inlet pipe (402) is connected with a second check valve (407).
10. The device for utilizing the flue gas waste heat of the waste heat boiler of the steam combined cycle power plant as claimed in claim 8, wherein a water discharge pipe (408) is connected to the hot water inlet pipe (402), and a sixth valve (409) is connected to the water discharge pipe (408).
Priority Applications (1)
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|---|---|---|---|
| CN202021070588.5U CN213480340U (en) | 2021-01-22 | 2021-01-22 | Steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization equipment |
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| CN202021070588.5U CN213480340U (en) | 2021-01-22 | 2021-01-22 | Steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization equipment |
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| CN202021070588.5U Expired - Fee Related CN213480340U (en) | 2021-01-22 | 2021-01-22 | Steam combined cycle power plant exhaust-heat boiler flue gas waste heat utilization equipment |
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