CN221169750U - Waste heat air comprehensive utilization system - Google Patents
Waste heat air comprehensive utilization system Download PDFInfo
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- CN221169750U CN221169750U CN202323144429.1U CN202323144429U CN221169750U CN 221169750 U CN221169750 U CN 221169750U CN 202323144429 U CN202323144429 U CN 202323144429U CN 221169750 U CN221169750 U CN 221169750U
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- 239000002918 waste heat Substances 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 144
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000000112 cooling gas Substances 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract description 22
- 230000001276 controlling effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model provides a waste heat air comprehensive utilization system, which belongs to the technical field of energy utilization and comprises a first pipeline, a water supply pipeline, a steam pipeline, a gas inlet pipeline and a gas outlet pipeline, wherein the first pipeline is connected between a cooling gas outlet and a cooling gas inlet of a gas-steam combined cycle unit, the first pipeline is sequentially connected with a steam generator and a first gas heat exchanger, a liquid outlet end of the water supply pipeline is connected with the steam generator, the steam pipeline is connected between the steam generator and a steam system of the unit, a gas outlet end of the gas inlet pipeline is connected with the first gas heat exchanger, and a gas outlet pipeline is connected between the first gas heat exchanger and the gas system of the unit. The waste heat air comprehensive utilization system provided by the utility model enables the high-temperature cooling air to heat the steam generator and the first gas heat exchanger in sequence to generate steam which is supplied to the steam system of the unit, and enables the gas temperature to be increased and then supplied to the gas system of the unit.
Description
Technical Field
The utility model belongs to the technical field of energy utilization, and particularly relates to a comprehensive utilization system of waste heat air.
Background
The Mitsubishi M701F4 gas turbine is a novel gas-steam combined cycle unit which is pushed out by a Mitsubishi heavy worker, is the combined cycle unit with the largest single-shaft capacity at present in China and is more advanced in design. In order to prevent the high temperature components in the gas channel from being damaged due to over temperature during operation and ensure the operation safety of the gas engine, cooling measures are needed for the high temperature components of the gas engine, and Turbine Cooling Air (TCA) for cooling the turbine components of the gas engine is pumped from the outlet of the gas engine, and after heat exchange is carried out with an external cooling medium (through a cooler), the turbine blades and the rotor are cooled. The temperature of Turbine Cooling Air (TCA) pumped from the outlet of a gas compressor of a gas turbine reaches 450 ℃, the Turbine Cooling Air (TCA) needs to be cooled to 200 ℃ to be used as cooling air of a rotor of the gas turbine, at present, high-temperature Turbine Cooling Air (TCA) is usually cooled by adopting cooling fans, three cooling fans are arranged at the bottom of a cooler, and the mode of treating the high-temperature Turbine Cooling Air (TCA) needs to consume a large amount of electric energy, so that the running cost of equipment is increased, and waste heat of the high-temperature Turbine Cooling Air (TCA) is not fully utilized, so that energy waste is caused.
Disclosure of utility model
The utility model aims to provide a comprehensive utilization system of waste heat air, which aims to reasonably utilize waste heat of high-temperature turbine cooling air extracted from an outlet of a gas compressor of a gas turbine, improve the energy utilization rate and reduce the running cost of equipment.
In order to achieve the above purpose, the utility model adopts the following technical scheme: provided is a waste heat air comprehensive utilization system including:
The first pipeline is connected between a cooling gas outlet and a cooling gas inlet of the gas-steam combined cycle unit, and is sequentially connected with a steam generator and a first gas heat exchanger along the conveying direction of cooling gas;
The liquid outlet end of the water supply pipeline is connected to the steam generator, and the steam pipeline is connected between the steam generator and a steam system of the gas-steam combined cycle unit;
The gas outlet pipe line is connected between the first gas heat exchanger and a gas system of the gas-steam combined cycle unit.
In one possible implementation, the water supply line is provided with a heater.
In one possible implementation manner, the liquid inlet end of the water supply pipeline is connected with a low-pressure economizer and a condenser in parallel, the liquid outlet end of the water supply pipeline is connected with the steam generator through a first water supply branch and a second water supply branch which are connected in parallel, and the first water supply branch and the second water supply branch are positioned between the heater and the steam generator.
In one possible implementation, the steam line is provided with a low pressure drum.
In one possible implementation manner, the condenser further comprises a steam branch, one end of the steam branch is connected to the steam pipeline and located at the front end of the low-pressure steam drum, and the other end of the steam branch is connected with the condenser.
In one possible implementation, the system further comprises a branch pipeline connected between the cooling gas outlet and the first gas heat exchanger and connected in parallel with the steam generator, and a branch regulating valve is arranged on the branch pipeline.
In one possible implementation, a first flow meter is provided on the first line, the first flow meter being located in front of the steam generator, and a second flow meter is provided on the branch line.
In one possible implementation manner, the heat exchange device further comprises a standby heat exchange unit, the standby heat exchange unit comprises a heat exchange pipeline, a fan group, an air heat exchanger and a second gas heat exchanger are sequentially arranged on the heat exchange pipeline along the transmission direction of the heat exchange pipeline, the air heat exchanger is connected between a cooling gas outlet and a cooling gas inlet of the gas-steam combined cycle unit through a second pipeline, the second gas heat exchanger is connected with a gas supply source through a second gas inlet pipeline, and the second gas heat exchanger is connected with a gas system of the gas-steam combined cycle unit through a second gas outlet pipeline.
In one possible implementation, the system further comprises a backup gas line connected between the gas supply source and the gas system of the gas-steam combined cycle unit.
In one possible implementation, the gas inlet line, the backup gas line and the gas supply are connected by a three-way valve.
The comprehensive utilization system of waste heat air provided by the utility model has the beneficial effects that: compared with the prior art, the waste heat air comprehensive utilization system has the advantages that the high-temperature turbine cooling air is guided to sequentially heat the steam generator and the first gas heat exchanger, so that steam generated by the steam generator is supplied to the steam system of the gas-steam combined cycle unit, the gas temperature of the gas subjected to gas exchange by the first gas is increased and then supplied to the gas system of the gas-steam combined cycle unit, the temperature of the high-temperature turbine cooling air is reduced to realize cyclic utilization, waste heat carried by the high-temperature turbine cooling air is fully utilized, and the running cost of equipment is further reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a comprehensive utilization system of waste heat air according to an embodiment of the present utility model.
Reference numerals illustrate:
1. A gas-steam combined cycle unit; 2. a gas supply source; 3. a steam generator; 4. a first gas heat exchanger; 5. a low pressure drum; 6. a heater; 7. a low pressure economizer; 8. a condenser; 9. a fan set; 10. an air heat exchanger; 11. a second gas heat exchanger; 12. a first flowmeter; 13. a second flowmeter; 14. a third flowmeter; 15. a fourth flow meter; 16. a branch line regulating valve; 17. a pressure regulating valve; 18. a three-way valve; 101. a first pipeline; 102. a second pipeline; 103. branch line piping; 201. a gas inlet line; 202. a gas outlet line; 203. a spare gas line; 301. a water supply line; 302. a steam line; 303. a first water supply branch; 304. a second water supply branch; 305. a steam branch; 401. and a heat exchange pipeline.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, a description will now be given of the exhaust heat air integrated utilization system provided by the present utility model. The waste heat air comprehensive utilization system comprises a first pipeline 101, a water supply pipeline 301, a steam pipeline 302, a gas inlet pipeline 201 and a gas outlet pipeline 202, wherein the first pipeline 101 is connected between a cooling gas outlet and a cooling gas inlet of the gas-steam combined cycle unit 1, the first pipeline 101 is sequentially connected with a steam generator 3 and a first gas heat exchanger 4 along the conveying direction of the cooling gas, a liquid outlet end of the water supply pipeline 301 is connected to the steam generator 3, the steam pipeline 302 is connected between the steam generator 3 and a steam system of the gas-steam combined cycle unit 1, a gas outlet end of the gas inlet pipeline is connected to the first gas heat exchanger 4, the gas outlet pipeline 202 is connected between the first gas heat exchanger 4 and the gas system of the gas-steam combined cycle unit 1, the cooling gas outlet discharges high-temperature gas, water in the steam generator 3 and the gas in the first gas heat exchanger 4 are sequentially heated, and then the gas in the first gas heat exchanger 4 is discharged into the gas-steam combined cycle unit 1 to cool gas turbine components and rotors, so that the steam generator 3 generates steam to be supplied to the steam system of the gas-steam combined cycle unit 1, and the gas outlet end of the gas pipeline is connected to the gas system of the gas-steam combined cycle unit 1, and the gas outlet pipeline 202 is connected to the gas system of the gas-steam combined cycle unit 1.
Wherein, steam generator 3 is the boiler, and first gas heat exchanger 4 is split type gravity heat pipe heat exchanger.
Compared with the prior art, the waste heat air comprehensive utilization system provided by the utility model has the advantages that the high-temperature turbine cooling air is led to sequentially heat the steam generator 3 and the first gas heat exchanger 4, so that steam generated by the steam generator 3 is supplied to the steam system of the gas-steam combined cycle unit 1, the gas temperature of the gas subjected to gas exchange by the first gas is increased and then supplied to the gas system of the gas-steam combined cycle unit 1, the temperature of the high-temperature turbine cooling air is reduced, the cyclic utilization is realized, and the waste heat carried by the high-temperature turbine cooling air is fully utilized, so that the running cost of equipment is reduced.
In some embodiments, referring to fig. 1, a branch line 103 is further connected between the cooling gas outlet and the first gas heat exchanger 4, the branch line 103 is connected in parallel with the steam generator 3, a branch line regulating valve 16 and a second flowmeter 13 are provided on the branch line, a first flowmeter 12 is provided on the first line 101, the first flowmeter 12 is provided at the front end of the steam generator 3, in practice, by providing the branch line 103 to shunt the high-temperature cooling gas flowing through the steam generator 3, thereby to regulate the temperature of the high-temperature cooling gas flowing into the first gas heat exchanger 4, in particular, a plurality of temperature detectors are provided along the transmission direction of the first line 101, the plurality of temperature detectors are provided in front of and behind the steam generator 3, and in front of and behind the first gas heat exchanger 4, respectively, in operation, an operator determines the real-time temperature of the high-temperature cooling gas in each section on the first pipeline 101 by observing the readings of each temperature detector, under normal conditions, the branch pipeline 103 is kept closed, the high-temperature cooling gas firstly flows through the steam generator 3 to perform first heat exchange to heat the steam generator 3 to produce steam, then flows through the first gas heat exchanger 4 to perform second heat exchange to heat the gas, when the fact that the temperature of the high-temperature cooling gas is reduced more after the first heat exchange and is insufficient to heat the gas to a preset temperature through the second heat exchange is detected, the branch pipeline 103 is opened to form a channel to shunt the high-temperature cooling gas flowing through the steam generator 3 by opening the branch pipeline 16, the high-temperature cooling gas flowing through the branch pipeline 103 does not pass through the first heat exchange and still has higher temperature, the high-temperature cooling gas flowing through the steam generator 3 is merged and then flows into the first gas heat exchanger 4 to heat the gas, and the flow rate of the high-temperature cooling gas flowing through the branch line 103 is regulated by controlling the branch line regulating valve 16 so that the high-temperature cooling gas flowing into the first gas heat exchanger 4 can be maintained within a suitable temperature range, whereby the gas flowing through the first gas heat exchanger 4 can be heated to a predetermined temperature.
In this embodiment, referring to fig. 1, a heater 6 and a third flowmeter 14 for heating water temperature are sequentially disposed on a water supply line 301 along a transmission direction thereof, and the heater 6 and the third flowmeter 14 are disposed in front of a steam generator 3, and temperature detectors are also disposed on the water supply line 301 along the transmission direction thereof in front of and behind the heater 6 for monitoring the temperature of water in the water supply line 301 in real time, when the temperature of water conveyed by the water supply line 301 is less than 85.8 ℃, a worker starts the heater 6 or the heater 6 automatically starts to heat the conveyed water, heats the water temperature to above 85.5 ℃ so that steam can be generated more quickly after the water is conveyed into the steam generator 3, when the temperature of water conveyed by the water supply line 301 is higher than 85.5 ℃, the heater 6 is turned off or not started, in this embodiment, the water supply line 301 is connected with the steam generator 3 through a first water supply branch 303 and a second water supply branch 304 connected in parallel, and the first water supply branch 303 and the second water supply branch 304 are connected in parallel, and when the first water supply branch 303 and the second water supply branch 304 are in a state of the first water supply branch 303 and the second water supply branch 303 are in a state of the first water supply branch and a second water supply branch 303, and a second water supply valve is in a state of the water supply branch 303.
In this embodiment, referring to fig. 1, a liquid inlet end on a water supply line 301 is connected in parallel with a low-pressure economizer 7 and a condenser 8, specifically, a pipeline is led out from the low-pressure economizer 7 and connected with the water supply line 301, and a pipeline is also led out from the condenser 8 and connected with the water supply line 301, in operation, if the low-pressure economizer 7 is filled with water, water is taken from an outlet of the low-pressure economizer 7, and if no water is in the low-pressure economizer 7, water is taken from the condenser 8.
In this embodiment, referring to fig. 1, a low pressure steam drum 5 is disposed on a steam pipeline 302, low pressure steam generated by a steam generator 3 can be temporarily stored in the low pressure steam drum 5, and when a predetermined condition is met, the low pressure steam is conveyed to a steam system of the gas-steam combined cycle unit 1 through the low pressure steam drum 5 for use, optionally, a fourth flow meter 15 and a pressure regulating valve 17 are sequentially disposed on the steam pipeline 302 along a conveying direction thereof, the steam pipeline 302 is divided into three paths into the low pressure steam drum 5, and due to pressure fluctuation of the low pressure steam drum 5, the pressure of the steam generated by the steam generator 3 and the pressure of the temporary stored steam in the low pressure steam drum 5 can be balanced through the regulation of the pressure regulating valve 17, so that the pressure of the low pressure steam drum 5 and the water level in the steam generator 3 are not affected after the steam enters the low pressure steam drum 5.
Further, referring to fig. 1, a steam branch 305 is further connected to the steam pipeline 302, specifically, one end of the steam branch 305 is connected to the steam pipeline 302 and located between the fourth flowmeter 15 and the pressure regulating valve 17, the other end of the steam branch 305 is connected to the condenser, and a control valve for controlling the steam branch 305 to open or close is provided on the steam branch 305.
In some embodiments, referring to fig. 1, the waste heat air comprehensive utilization system provided by the present utility model further includes a backup heat exchange unit, where the backup heat exchange unit includes a heat exchange pipeline 401, and the heat exchange pipeline 401 is sequentially provided with a fan group 9, an air heat exchanger 10 and a second gas heat exchanger 11 along a transmission direction of the heat exchange pipeline, where the air heat exchanger 10 is connected between a cooling gas outlet and a cooling gas inlet of the gas-steam combined cycle unit 1 through a second pipeline 102, the second gas heat exchanger 11 is connected to a gas supply source 2 through a second gas inlet pipeline 201, and the second gas heat exchanger 11 is connected to a gas system of the gas-steam combined cycle unit 1 through a second gas outlet pipeline 202. In this embodiment, the air heat exchanger 10 is a surface type gas turbine cooling air heat exchanger 10, the second gas heat exchanger 11 is a surface type fuel heating heat exchanger, the fan group 9 is composed of three cooling fans, during operation, the fan group 9 blows air, the air first passes through the air heat exchanger 10 through the heat exchange pipeline 401 to perform first heat exchange, so that high-temperature cooling gas discharged from the cooling outlet and passing through the air heat exchanger 10 is cooled, the temperature is reduced, meanwhile, the air blown by the fan group 9 is heated, and passes through the second gas heat exchanger 11 along the heat exchange pipeline 401, the air heated by the air heat exchanger 10 performs second heat exchange with gas passing through the second gas heat exchanger 11, so that the temperature of the gas in the second gas heat exchanger 11 is raised to reach a predetermined temperature and is discharged into a gas system of the gas-steam combined cycle unit 1.
By arranging the standby heat exchange unit and enabling the first pipeline 101 and the second pipeline 102 to be connected in parallel, the first pipeline 101 and the second pipeline 102 can be switched through valves for use in equipment maintenance, so that the safety and the practicability of the whole system are improved.
Optionally, referring to fig. 1, a spare gas pipeline 203 is directly connected between the gas supply source 2 and the gas system of the gas-steam combined cycle unit 1, and by providing the spare gas pipeline 203, the gas supply source 2 can still transmit the gas to the gas system of the gas-steam combined cycle unit 1 through the spare gas pipeline 203 when an emergency occurs between the first gas heat exchanger 4 and the second gas heat exchanger 11, so as to ensure that the unit can work normally.
Further, the gas inlet pipeline 201, the standby gas pipeline 203 and the gas supply source 2 are connected through the three-way valve 18, and when in use, gas can enter different pipelines as required by controlling the three-way valve 18, so that the use amount of the valve is reduced, and the whole system structure is concise.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The waste heat air comprehensive utilization system is characterized by comprising:
The first pipeline (101) is connected between a cooling gas outlet and a cooling gas inlet of the gas-steam combined cycle unit (1), and the first pipeline (101) is sequentially connected with a steam generator (3) and a first gas heat exchanger (4) along the conveying direction of the cooling gas;
A water supply line (301) and a steam line (302), wherein the liquid outlet end of the water supply line (301) is connected to the steam generator (3), and the steam line (302) is connected between the steam generator (3) and a steam system of the gas-steam combined cycle unit (1);
The gas-steam combined cycle unit comprises a gas inlet pipeline (201) and a gas outlet pipeline (202), wherein the gas outlet end of the gas inlet pipeline (201) is connected to the first gas heat exchanger (4), and the gas outlet pipeline (202) is connected between the first gas heat exchanger (4) and a gas system of the gas-steam combined cycle unit (1).
2. The exhaust heat air integrated utilization system according to claim 1, wherein a heater (6) is provided on the water supply line (301).
3. The waste hot air comprehensive utilization system according to claim 2, wherein the liquid inlet end of the water supply pipeline (301) is connected in parallel with a low-pressure economizer (7) and a condenser (8), the liquid outlet end of the water supply pipeline (301) is connected with the steam generator (3) through a first water supply branch (303) and a second water supply branch (304) which are connected in parallel with each other, and the first water supply branch (303) and the second water supply branch (304) are positioned between the heater (6) and the steam generator (3).
4. A waste hot air integrated utilization system according to claim 3, characterized in that the steam line (302) is provided with a low pressure drum (5).
5. The exhaust heat air integrated utilization system according to claim 4, further comprising a steam branch (305), wherein one end of the steam branch (305) is connected to the steam pipeline (302) and located at the front end of the low-pressure steam drum (5), and the other end of the steam branch (305) is connected to the condenser (8).
6. The waste hot air comprehensive utilization system according to claim 1, further comprising a branch line (103), wherein the branch line (103) is connected between a cooling gas outlet and the first gas heat exchanger (4) and is connected in parallel with the steam generator (3), and a branch line regulating valve (16) is arranged on the branch line (103).
7. The exhaust heat air integrated utilization system according to claim 6, wherein a first flowmeter (12) is provided on the first pipeline (101), the first flowmeter (12) is located in front of the steam generator (3), and a second flowmeter (13) is provided on the branch pipeline (103).
8. The waste heat air comprehensive utilization system according to claim 1, further comprising a standby heat exchange unit, wherein the standby heat exchange unit comprises a heat exchange pipeline (401), a fan group (9), an air heat exchanger (10) and a second gas heat exchanger (11) are sequentially arranged on the heat exchange pipeline (401) along the transmission direction of the heat exchange pipeline, the air heat exchanger (10) is connected between a cooling gas outlet and a cooling gas inlet of the gas-steam combined cycle unit (1) through a second pipeline (102), the second gas heat exchanger (11) is connected with a gas supply source (2) through a second gas inlet pipeline (201), and the second gas heat exchanger (11) is connected with a gas system of the gas-steam combined cycle unit (1) through a second gas outlet pipeline (202).
9. The exhaust heat air integrated utilization system according to claim 8, further comprising a backup gas line (203), the backup gas line (203) being connected between the gas supply source (2) and the gas system of the gas-steam combined cycle unit (1).
10. The exhaust heat air integrated utilization system according to claim 9, wherein the gas intake line (201), the spare gas line (203) and the gas supply source (2) are connected by a three-way valve (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323144429.1U CN221169750U (en) | 2023-11-20 | 2023-11-20 | Waste heat air comprehensive utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323144429.1U CN221169750U (en) | 2023-11-20 | 2023-11-20 | Waste heat air comprehensive utilization system |
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| Publication Number | Publication Date |
|---|---|
| CN221169750U true CN221169750U (en) | 2024-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202323144429.1U Active CN221169750U (en) | 2023-11-20 | 2023-11-20 | Waste heat air comprehensive utilization system |
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| Country | Link |
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| CN (1) | CN221169750U (en) |
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2023
- 2023-11-20 CN CN202323144429.1U patent/CN221169750U/en active Active
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