CN214424606U - Gas heating system of gas turbine front module - Google Patents
Gas heating system of gas turbine front module Download PDFInfo
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- CN214424606U CN214424606U CN202120517841.5U CN202120517841U CN214424606U CN 214424606 U CN214424606 U CN 214424606U CN 202120517841 U CN202120517841 U CN 202120517841U CN 214424606 U CN214424606 U CN 214424606U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model discloses a gas heating system of leading module of gas turbine relates to the gas heating field, has solved the great problem of energy loss among the current gas heating system. The system comprises: the system comprises a gas heater (1), a check valve (5), a low-pressure steam pocket (7), a low-pressure economizer (8), a water supply adjusting valve (9), a flow transmitter (10) and a liquid level switch (12); the water side inlet of the gas heater (1) is connected with a flow transmitter (10), and the water side outlet is divided into two paths to be connected with a low-pressure steam drum (7) and a low-pressure economizer (8); the water supply regulating valve (9) is arranged between the low-pressure steam drum (7) and the low-pressure economizer (8); the check valve (5) is arranged on a branch of the gas heater (1) connected with the low-pressure economizer (8); the liquid level switch (12) is arranged on the air inlet side of the fuel gas heater (1). The utility model has the advantages that: the return water of the gas heater does not influence the heat load of the condenser, the plant power consumption rate can be reduced, and the unit operation economy under low load is improved.
Description
Technical Field
The utility model relates to a gas heating system, it is specific, relate to a gas heating system of leading module of combustion engine.
Background
At present, a plurality of gas heating systems of a gas turbine front module in a combined cycle power plant are available, one is that a part of high-temperature high-pressure exhaust gas at an outlet of a gas turbine compressor is used as an intermediate medium to heat inlet gas of the gas turbine through air in the atmosphere. Namely, a part of exhaust gas of a compressor of the combustion engine heats air in the atmosphere, then the heated air is used for heating inlet fuel gas of the combustion engine, and the air is exhausted into the atmosphere from the atmosphere. On one hand, the gas heating system is an open system, air exhausted by the heating system has certain temperature, so that partial energy loss is caused, and heat pollution is brought to the environment, on the other hand, the air is directly heated by exhausting air from an air compressor outlet which works by a combustion engine, and then the air is conveyed to inlet gas of a heater through the air, so that heat transfer of large temperature difference does not conform to cascade utilization of energy, and the gas heating system is not beneficial to energy conservation.
The other gas heating system is characterized in that a part of water at the outlet of a medium-pressure economizer of a waste heat boiler in combined cycle is used for supplying water to heat inlet gas of a combustion engine, return water returns to a condenser at the starting stage of a combined cycle unit, and the return water is switched to the inlet of a low-pressure economizer of the waste heat boiler after the unit carries a certain load.
Patent application No. CN201320696314.0 discloses a waste heat utilization type natural gas heating system for a combustion engine, which utilizes waste heat in a closed water system to heat natural gas, and although natural gas can be heated without consuming new energy, it cannot be guaranteed that sufficient waste heat heats natural gas and that natural gas can be accurately heated to a desired temperature.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the above-mentioned problem, provide a gas heating system of leading module of combustion engine.
A gas heating system of a gas turbine front module comprising: the system comprises a gas heater, a check valve, a low-pressure steam pocket, a low-pressure economizer, a water supply regulating valve, a flow transmitter and a liquid level switch;
the water side inlet of the gas heater is connected with the flow transmitter, the water side outlet is divided into two branches, one branch is connected with the low-pressure steam drum, and the other branch is connected with the low-pressure economizer;
the low-pressure steam drum is connected with the low-pressure economizer, and a water supply regulating valve is also arranged between the low-pressure steam drum and the low-pressure economizer;
the check valve is arranged on a branch of the gas heater connected with the low-pressure economizer;
the liquid level switch is installed on the air inlet side of the fuel gas heater.
Preferably, the gas heater is a shell-and-tube heat exchanger.
Preferably, still include pneumatic stop valve I, pneumatic stop valve II and pneumatic stop valve III, pneumatic stop valve I and pneumatic stop valve II are parallelly connected, set up between gas heater and flow transmitter, pneumatic stop valve III sets up on the branch way of gas heater connection low pressure steam pocket.
Preferably, an open position switch is further mounted at the pneumatic stop valve II.
Preferably, a pressure transmitter, a temperature sensor and a regulating valve are further sequentially arranged between the gas heater and the two branches.
The utility model has the advantages that: the system is a closed gas heating system, the waste heat boiler with lower energy quality is adopted to supply water in a medium pressure manner to heat gas close to normal temperature, on the premise of meeting the gas temperature requirement of a gas turbine, the heat loss is reduced, the loss of high-grade energy is avoided, when the gas turbine is started and the return water temperature of a gas heater is high, the water returns to a low-pressure steam pocket, when the gas turbine carries a certain load and the return water temperature of the gas heater is not high, the water returns to an inlet pipeline of a low-pressure economizer of the waste heat boiler, the heat in the return water of the gas heater is fully utilized, and the cascade utilization of energy is met; the return water of the gas heater does not influence the heat load of the condenser, the plant power consumption rate can be reduced, and the unit operation economy under low load is improved.
Drawings
Fig. 1 is a schematic view of the present invention.
In the figure: the system comprises a gas heater 1, a pneumatic stop valve 2, a pneumatic stop valve I, a pneumatic stop valve 3, a regulating valve 4, a check valve 5, a pneumatic stop valve 6, a low-pressure steam drum 7, a low-pressure economizer 8, a water supply adjusting valve 9, a flow transmitter 10, an open position switch 11, a liquid level switch 12, a pressure transmitter 13 and a temperature sensor 14.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, a gas heating system of a gas turbine front module comprises a gas heater 1, a check valve 5, a low-pressure steam drum 7, a low-pressure economizer 8, a water supply regulating valve 9, a flow transmitter 10 and a liquid level switch 12;
the water side inlet of the gas heater 1 is connected with a flow transmitter 10, the water side outlet is divided into two branches, one branch is connected with a low-pressure steam drum 7, and the other branch is connected with a low-pressure economizer 8;
the low-pressure steam drum 7 is connected with the low-pressure economizer 8, and a water supply regulating valve 9 is arranged between the low-pressure steam drum 7 and the low-pressure economizer 8;
the check valve 5 is arranged on a branch of the gas heater 1 connected with the low-pressure economizer 8;
the liquid level switch 12 is installed on the air inlet side of the gas heater 1.
It should be understood that the gas heater 1 is a shell-and-tube heat exchanger, the gas flows through the shell pass, the water flows through the tube pass, and the gas heater is arranged in a counter-flow manner, the heat source of the gas heater is medium-pressure feed water, and the heated object is gas.
It needs to understand, still include pneumatic stop valve I2, pneumatic stop valve II 3 and pneumatic stop valve III 6, pneumatic stop valve I2 and pneumatic stop valve II 3 are parallelly connected, set up between gas heater 1 and flow transmitter 10, pneumatic stop valve III 6 sets up on gas heater 1 connects the branch way of low pressure steam pocket 7.
It should be noted that the pipe diameter and the through flow of the pneumatic stop valve II 3 are larger than those of the pneumatic stop valve I2.
It is to be understood that an open switch 11 is also arranged at the pneumatic stop valve II 3.
It should be understood that a pressure transmitter (13), a temperature sensor 14 and a regulating valve 4 are further sequentially arranged between the gas heater 1 and the two branches.
It should be noted that medium-pressure feed water enters the gas turbine heater 1 through the pneumatic stop valve I2 and the pneumatic stop valve II 3, then is divided into two paths through the regulating valve 4, one path enters the low-pressure economizer 8 through the check valve 5, the other path enters the low-pressure steam pocket 7 through the pneumatic stop valve II 3, and condensed water enters the low-pressure steam pocket 7 through the low-pressure economizer 8 and the feed water regulating valve 9.
It is understood that the flow transmitter 10 is used for monitoring the water side flow of the gas heater 1, the open switch 11 is used for detecting whether the A pneumatic stop valve 3 is fully opened, the liquid level switch 12 is used for monitoring the liquid level at the gas side of the gas heater 1, and the pressure transmitter 13 and the temperature sensor 14 are used for monitoring the pressure and the temperature of the outlet water of the gas heater 1.
It should be noted that, the working process of the gas heating system of the gas turbine front module is as follows: 1 start-up procedure of gas heater, pneumatic stop valve I2 opens earlier, and after pressure transmitter 13 pressure reached 4MPa, pneumatic stop valve II 3 opened, after open position switch 11 detected pneumatic stop valve II 3 and opened entirely, pneumatic stop valve I2 closed, and pneumatic stop valve III 6 is opened, and governing valve 4 controls the valve aperture according to the predetermined curve, and the low pressure steam pocket 7 is flowed into after the heat transfer of combustion engine heater 1 to the middling pressure feedwater.
When the temperature sensor 14 detects that the water temperature at the outlet of the gas heater 1 is lower than 80 ℃, the pneumatic stop valve III 6 is closed, and medium-pressure feed water flows into the inlet of the low-pressure economizer 8 after heat exchange through the gas turbine heater 1.
When the liquid level switch 12 detects that the liquid level of the gas side of the gas heater 1 is higher than 300mm, the water on the inner pipe side of the gas heater is leaked into the shell side, and the pneumatic stop valve II 3, the pneumatic stop valve I2, the regulating valve 4 and the pneumatic stop valve III 6 are closed.
Claims (5)
1. A gas heating system of a gas turbine front module, comprising: the system comprises a gas heater (1), a check valve (5), a low-pressure steam pocket (7), a low-pressure economizer (8), a water supply adjusting valve (9), a flow transmitter (10) and a liquid level switch (12);
the water side inlet of the gas heater (1) is connected with the flow transmitter (10), the water side outlet is divided into two branches, one branch is connected with the low-pressure steam pocket (7), and the other branch is connected with the low-pressure economizer (8);
the low-pressure steam drum (7) is connected with the low-pressure economizer (8), and a water supply regulating valve (9) is arranged between the low-pressure steam drum (7) and the low-pressure economizer (8);
the check valve (5) is arranged on a branch of the gas heater (1) connected with the low-pressure economizer (8);
the liquid level switch (12) is installed on the air inlet side of the fuel gas heater (1).
2. A gas heating system of a gas turbine front module according to claim 1, characterized in that the gas heater (1) is a shell-and-tube heat exchanger.
3. The gas heating system of the gas turbine front module according to claim 1, further comprising a pneumatic stop valve I (2), a pneumatic stop valve II (3) and a pneumatic stop valve III (6), wherein the pneumatic stop valve I (2) and the pneumatic stop valve II (3) are connected in parallel and arranged between the gas heater (1) and the flow transmitter (10), and the pneumatic stop valve III (6) is arranged on a branch of the gas heater (1) connected with the low-pressure steam drum (7).
4. A gas heating system of a front module of a combustion engine as set forth in claim 3, characterized in that said pneumatic stop valve ii (3) is further provided with an on-position switch (11).
5. The gas heating system of the gas turbine front module according to claim 1, characterized in that a pressure transmitter (13), a temperature sensor (14) and a regulating valve (4) are further arranged between the gas heater (1) and the two branches in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120517841.5U CN214424606U (en) | 2021-03-11 | 2021-03-11 | Gas heating system of gas turbine front module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120517841.5U CN214424606U (en) | 2021-03-11 | 2021-03-11 | Gas heating system of gas turbine front module |
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| Publication Number | Publication Date |
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| CN214424606U true CN214424606U (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120517841.5U Active CN214424606U (en) | 2021-03-11 | 2021-03-11 | Gas heating system of gas turbine front module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135853A (en) * | 2021-11-03 | 2022-03-04 | 中山嘉明电力有限公司 | Method and system for increasing outlet smoke temperature of low-pressure economizer |
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2021
- 2021-03-11 CN CN202120517841.5U patent/CN214424606U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135853A (en) * | 2021-11-03 | 2022-03-04 | 中山嘉明电力有限公司 | Method and system for increasing outlet smoke temperature of low-pressure economizer |
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