CN217682023U - Gas turbine fuel gas heating system - Google Patents
Gas turbine fuel gas heating system Download PDFInfo
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- CN217682023U CN217682023U CN202221819120.0U CN202221819120U CN217682023U CN 217682023 U CN217682023 U CN 217682023U CN 202221819120 U CN202221819120 U CN 202221819120U CN 217682023 U CN217682023 U CN 217682023U
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- heat exchanger
- filter element
- heating system
- pipeline
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Abstract
The utility model belongs to the field of gas power generation systems, and discloses a gas turbine gas heating system, which comprises a gas supply pipe, a gas output pipe, a medium-pressure economizer, a first heat exchanger, a second heat exchanger and a condenser, wherein a steam outlet of the medium-pressure economizer is connected with a steam pipeline; the gas supply pipe is sequentially connected with the shell pass of the first heat exchanger, the shell pass of the second heat exchanger and the gas output pipe; the steam pipeline is sequentially connected with the tube side of the second heat exchanger, the tube side of the first heat exchanger and the condenser. The system adopts the waste steam of the medium-pressure economizer to carry out secondary heating on the fuel gas, thereby realizing fuel gas preheating.
Description
Technical Field
The utility model relates to a gas power generation system field, especially a gas turbine gas heating system.
Background
In the power generation process of the gas unit, the gas can be produced only by preheating, so that the fluctuation of the gas temperature can be reduced, and the energy conservation and consumption reduction can be realized.
CN202120738502.X discloses a box gas generating set's gas preheating device, sets up in box gas generating set's box, separate through the baffle in the box and be provided with air inlet chamber and air-out chamber, be provided with on the baffle with the heat dissipation channel of air inlet chamber and air-out chamber intercommunication, including installing the gas admission line in the air-out intracavity, the inlet end of gas admission line by the box extends to outward the air outlet chamber, the end of giving vent to anger of gas admission line by the air-out chamber extends to the air inlet chamber, gas admission line with the baffle is parallel and just to heat dissipation channel.
The scheme is not suitable for preheating the fuel gas of a large-scale fuel gas unit of the company.
The technical problem solved by the scheme is as follows: how to realize the preheating of the fuel gas to save energy and reduce consumption.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a gas turbine gas heating system, this system adopts the useless vapour of middling pressure economizer to carry out the secondary heating to the gas, realizes that the gas preheats.
The utility model provides a technical scheme does: a gas turbine fuel gas heating system comprises a fuel gas supply pipe and a fuel gas output pipe, and also comprises a medium-pressure economizer, a first heat exchanger, a second heat exchanger and a condenser, wherein a steam outlet of the medium-pressure economizer is connected with a steam pipeline; the gas supply pipe is sequentially connected with the shell pass of the first heat exchanger, the shell pass of the second heat exchanger and the gas output pipe; the steam pipeline is sequentially connected with the tube side of the second heat exchanger, the tube side of the first heat exchanger and the condenser.
In the gas heating system of the combustion engine, a temperature sensor is arranged at the outlet of the shell pass of the second heat exchanger; an electric control three-way valve is connected to the fuel gas supply pipe, and a connecting pipeline is arranged between the electric control three-way valve and the fuel gas output pipe; and the electric control three-way valve acts according to the data of the temperature sensor.
In the gas heating system of the gas turbine, a natural gas fine filter, a gas flowmeter and a gas accident shutoff valve are connected in series on the gas supply pipe.
In the gas heating system of the gas turbine, the gas output pipe is connected with a gas terminal filter.
In the gas-fired heating system of the gas turbine, the system further comprises a nitrogen supply pipeline; the nitrogen gas supply pipeline is connected to the fuel gas output pipe through a first pipeline, and a valve is arranged on the first pipeline.
In the gas heating system of the gas turbine, the natural gas polishing filter comprises a shell and a filter element, the shell is divided into a filter element outer layer area and a filter element inner layer area, the shell is provided with a gas inlet and a gas outlet, the gas inlet is communicated with the filter element outer layer area, and the gas outlet is communicated with the filter element inner layer area; the fuel gas enters through the fuel gas inlet, is filtered by the filter element and then is discharged from the fuel gas outlet; the nitrogen supply line is connected to the outer region of the cartridge.
In the gas heating system of the gas turbine, the outer layer area and the inner layer area of the filter element are both connected with a sewage discharge pipeline.
In the gas heating system for the combustion engine, a differential pressure sensor is arranged between the outer layer area and the inner layer area of the filter element.
In the gas heating system of the combustion engine, the gas heating system further comprises a dispersion main pipe, the outer layer area of the filter element is connected to the dispersion main pipe through a second pipeline, and a valve is arranged on the second pipeline.
By adopting the above technical scheme, the utility model, its beneficial effect who has is:
the system of this scheme adopts the exhaust steam of middling pressure economizer to carry out the secondary heating to the gas, realizes that the gas preheats.
Further preferably, an electric control three-way valve is arranged to mix the gas which is not preheated with the gas which is preheated, so that the gas temperature control precision is optimized.
Drawings
Fig. 1 is a flowchart of embodiment 1 of the present invention;
fig. 2 is a structural diagram of a gas polishing filter according to embodiment 1 of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the following detailed description, but the present invention is not limited thereto.
Example 1:
as shown in fig. 1, a gas-fired engine gas heating system comprises a gas supply pipe 1 and a gas output pipe 2, and further comprises a medium-pressure economizer 3, a first heat exchanger 4, a second heat exchanger 5 and a condenser 6, wherein a steam outlet of the medium-pressure economizer 3 is connected with a steam pipeline 7; the gas supply pipe 1 is sequentially connected with a shell pass of the first heat exchanger 4, a shell pass of the second heat exchanger 5 and the gas output pipe 2; the steam pipeline 7 is sequentially connected with a tube side of the second heat exchanger 5, a tube side of the first heat exchanger 4 and the condenser 6.
In this embodiment, the exhaust steam of the medium-pressure economizer 3 is adopted to carry out secondary heating to the gas, and the gas is preheated, and particularly, the gas and the steam have twice heat exchange processes, and the first time is that the gas exchanges heat with the steam in the first heat exchanger 4, and the second time is that the heat exchange is carried out in the second heat exchanger 5, and through setting up two heat exchangers, the stability that the gas heaied up can be provided, and simultaneously, the heat of the exhaust steam of the medium-pressure economizer 3 can be fully utilized.
Preferably, a temperature sensor 8 is arranged at the outlet of the shell side of the second heat exchanger 5; the gas supply pipe 1 is connected with an electric control three-way valve 9, and a connecting pipeline is arranged between the electric control three-way valve 9 and the gas output pipe 2; the electrically controlled three-way valve 9 acts according to the data of the temperature sensor 8. More preferably, a temperature sensor 8 is also provided on the gas outlet pipe 2, and the temperature control result of the electrically controlled three-way valve 9 can be fed back by the temperature sensor 8.
When the temperature of the outlet of the shell side of the second heat exchanger 5 is higher, the electric control three-way valve 9 increases the flow of the connecting pipeline until the flow of the first heat exchanger 4 is reduced, so that the temperature control of the fuel gas output pipe 2 is realized.
As the optimization of the embodiment, a natural gas fine filter 10, a gas flowmeter 11 and a gas accident shutoff valve 12 are connected in series on the gas supply pipe 1, and a gas terminal filter 13 is connected on the gas output pipe 2.
In order to improve the safety of the system, the scheme also provides a nitrogen supply pipeline 14; the nitrogen supply pipe 14 is connected to the gas outlet pipe 2 through a first pipe, and a valve is arranged on the first pipe. When an emergency occurs, the nitrogen input value and the nitrogen output pipe can be isolated from gas through the nitrogen supply pipeline 14;
meanwhile, the nitrogen gas supply pipeline 14 can also be used as a supply source of back flushing and shielding gas of the natural gas polishing filter 10, specifically, referring to fig. 2, the natural gas polishing filter 10 includes a casing 15 and a filter element 16, the casing 15 is divided into a filter element outer layer area 17 and a filter element inner layer area 18, the casing 15 is provided with a gas inlet and a gas outlet, the gas inlet is communicated with the filter element outer layer area 17, and the gas outlet is communicated with the filter element inner layer area 18; the fuel gas enters through the fuel gas inlet, is filtered by the filter element 16 and then is discharged from the fuel gas outlet; the nitrogen supply pipeline 14 is connected to a filter element outer layer area 17, the filter element outer layer area 17 and the filter element inner layer area 18 are both connected with a sewage discharge pipeline 20, a pressure difference sensor 19 is arranged between the filter element outer layer area 17 and the filter element inner layer area 18, the nitrogen filter further comprises a dispersion header pipe 21, the filter element outer layer area 17 is connected to the dispersion header pipe 21 through a second pipeline 22, and a valve is arranged on the second pipeline 22.
In the production process, the number of the natural gas polishing filters 10 is generally 2, one is used and the other is reserved; when the pressure difference sensor 19 of one natural gas fine filter 10 detects that the pressure difference is too large, the natural gas fine filter 10 stops using, the other natural gas fine filter 10 is put into use, when the natural gas fine filter 10 stops using, the nitrogen supply pipeline 14 reversely blows the filter element 16, and nitrogen and impurities are discharged from the sewage discharge pipeline 20. Meanwhile, if an emergency occurs in the system, the nitrogen supply pipeline 14 can also be used as a replacement gas, the nitrogen of the nitrogen supply pipeline 14 is injected into the natural gas polishing filter 10 which is in use, the gas inlet of the natural gas polishing filter 10 is stopped from supplying gas, and the injected nitrogen is discharged from the dispersion header pipe 21.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all should be included in the scope of the present invention.
Claims (9)
1. A gas turbine gas heating system comprises a gas supply pipe and a gas output pipe, and is characterized by further comprising a medium-pressure economizer, a first heat exchanger, a second heat exchanger and a condenser, wherein a steam outlet of the medium-pressure economizer is connected with a steam pipeline; the gas supply pipe is sequentially connected with the shell pass of the first heat exchanger, the shell pass of the second heat exchanger and the gas output pipe; the steam pipeline is sequentially connected with the tube side of the second heat exchanger, the tube side of the first heat exchanger and the condenser.
2. The gas heating system of a combustion engine as set forth in claim 1, wherein a temperature sensor is provided at an outlet of a shell side of said second heat exchanger; the fuel gas supply pipe is connected with an electric control three-way valve, and a connecting pipeline is arranged between the electric control three-way valve and the fuel gas output pipe; and the electric control three-way valve acts according to the data of the temperature sensor.
3. A gas-fired engine gas heating system as claimed in claim 1, wherein said gas supply pipe is connected in series with a natural gas polishing filter, a gas flow meter, and a gas accident shutoff valve.
4. A gas-fired engine gas heating system as in claim 1, wherein a gas end filter is connected to said gas outlet conduit.
5. A gas turbine gas heating system as claimed in claim 3, further comprising a nitrogen supply conduit; the nitrogen gas supply pipeline is connected to the fuel gas output pipe through a first pipeline, and a valve is arranged on the first pipeline.
6. The gas-fired heating system of the gas turbine as in claim 5, wherein the gas polishing filter comprises a housing and a filter element, the housing is divided into a filter element outer layer area and a filter element inner layer area, the housing is provided with a gas inlet and a gas outlet, the gas inlet is communicated with the filter element outer layer area, and the gas outlet is communicated with the filter element inner layer area; the fuel gas enters through the fuel gas inlet, is filtered by the filter element and then is discharged from the fuel gas outlet; the nitrogen supply line is connected to the outer region of the cartridge.
7. A gas heating system for a combustion engine as defined in claim 6, wherein said outer region and said inner region of said filter element are connected to a blow-down line.
8. A gas heating system for a combustion engine as defined in claim 6, wherein a differential pressure sensor is provided between said outer region of said filter element and said inner region of said filter element.
9. A gas heating system for a combustion engine as defined in claim 6, further comprising a distribution manifold, said outer region of said filter element being connected to said distribution manifold by a second conduit, said second conduit being valved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221819120.0U CN217682023U (en) | 2022-07-13 | 2022-07-13 | Gas turbine fuel gas heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221819120.0U CN217682023U (en) | 2022-07-13 | 2022-07-13 | Gas turbine fuel gas heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217682023U true CN217682023U (en) | 2022-10-28 |
Family
ID=83717769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221819120.0U Active CN217682023U (en) | 2022-07-13 | 2022-07-13 | Gas turbine fuel gas heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217682023U (en) |
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2022
- 2022-07-13 CN CN202221819120.0U patent/CN217682023U/en active Active
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