CN220203983U - Heat supply steam system of power plant - Google Patents
Heat supply steam system of power plant Download PDFInfo
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- CN220203983U CN220203983U CN202320977034.0U CN202320977034U CN220203983U CN 220203983 U CN220203983 U CN 220203983U CN 202320977034 U CN202320977034 U CN 202320977034U CN 220203983 U CN220203983 U CN 220203983U
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- 238000010438 heat treatment Methods 0.000 claims abstract description 88
- 239000003638 chemical reducing agent Substances 0.000 claims description 27
- 230000001105 regulatory effect Effects 0.000 claims description 21
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The application discloses power plant heating steam system, including being used for discharging heating steam's turbine group, adjusting the closed check valve group of pipeline, be used for adjusting heating steam parameter's main road heating steam pipeline, heating steam header and be used for matching the bypass heating steam pipeline of the required heating steam pipeline flow of user under the condition of heating low load. Through the bypass heat supply steam pipeline that sets up, under the circumstances that the heat load is low, heat supply steam flow is little, open valve and the temperature and pressure reduction device on the bypass can make heat supply steam get into heat supply steam header after the pressure reduction of heat supply steam, can solve electronic temperature and pressure reduction ware and can produce great noise and vibration's problem because of pressure drop increase around.
Description
Technical Field
The application relates to the technical field of heating systems, in particular to a heating steam system of a power plant.
Background
In recent years, the country has actively advanced the development of cogeneration of clean energy, and the development of cogeneration is mainly completed through a cogeneration generator set. When the cogeneration generator set is used for producing electric energy, the steam which is acted by the steam turbine generator is used for supplying heat to a user, so that the use efficiency of energy sources can be improved, carbon emission reduction can be indirectly realized, the current industrial market is the main consumption field of cogeneration, and for the generator set for providing industrial heat load, the heat supply is performed after the steam extraction, temperature reduction and pressure reduction by adopting a high-pressure cylinder steam exhaust pipeline check valve (reheat cold section) according to the heat load requirement of the industrial user.
In the actual operation process of the power plant, when the heat load required by the peripheral heat users is higher, the flow of the heat supply steam of the cold section is larger, and the heat supply steam is conveyed to the heat users for use through the heat supply steam header after being regulated into the steam parameters required by the users through the electric temperature and pressure reducer. But at lower heat loads required by the heat consumer, the flow of heating steam extracted from the reheat cold leg becomes lower. With the reduction of the flow, the pressure of the electric temperature and pressure reducer is close to the exhaust pressure of the high-pressure cylinder under the pure condensation working condition due to the running characteristic of the unit, so that the inlet steam pressure of the electric temperature and pressure reducer is increased. However, after the heat supply steam flow is reduced, the steam flow rate is reduced due to the fact that the pipe diameter of the pipeline is unchanged, the pressure drop of a heat supply pipeline outside the power plant is reduced, and the steam parameters required by a heat user are unchanged or even reduced, so that the outlet steam pressure of the electric temperature and pressure reducer is reduced. Therefore, under the condition of low heat supply load, the electric temperature and pressure reducer can generate larger noise and vibration due to the increase of front and rear pressure drops, so that the safety and the operation reliability of the system are greatly reduced.
Disclosure of Invention
An object of the present application is to overcome the prior art defect, and to provide a power plant heating steam system, through the bypass heating steam pipeline that sets up, under the circumstances that the heat load is low, heating steam flow is little, bypass heating steam pipeline can match the required heating steam pipeline flow of user under the circumstances of heat supply low load, solves the problem that electronic temperature and pressure reducer can produce great noise and vibration because of the pressure drop increase around.
The purpose of the application is realized through the following technical scheme:
in a first aspect, the present application proposes a power plant heating steam system comprising: the system comprises a high-pressure cylinder steam exhaust pipeline for exhausting heat supply steam, a check valve group for adjusting pipeline closure, a main heat supply steam pipeline for adjusting heat supply steam parameters, a heat supply steam header and a bypass heat supply steam pipeline for matching the flow of the heat supply steam pipeline required by a user under the condition of low heat supply load;
the bypass heat supply steam pipeline comprises an electric stop valve, a flowmeter, a temperature and pressure reducing device, an electric gate valve and a first check valve which are sequentially connected, wherein the electric stop valve is connected with one end of the main heat supply steam pipeline and the check valve group, and the first check valve is respectively connected with the other end of the main heat supply steam pipeline and the heat supply steam header.
In an alternative embodiment, the high-pressure cylinder exhaust pipe comprises a high-pressure cylinder, a high-pressure cylinder exhaust pipe check valve for preventing reverse flow of gas and a reheater for receiving exhaust gas of the high-pressure cylinder, which are connected in sequence.
In an alternative embodiment, the system further comprises a medium pressure cylinder and a low pressure cylinder connected in sequence, the high pressure cylinder, the medium pressure cylinder and the low pressure cylinder being connected together by bearings.
In an alternative embodiment, the check valve set includes a pneumatic quick-closing check valve, a pneumatic quick-closing adjusting valve, and a flow measuring device connected in sequence, the flow measuring device being used for measuring the flow of the heating steam.
In an alternative embodiment, the main heating steam pipeline comprises an electric temperature and pressure reducer, an electric butterfly valve and a second check valve which are connected in sequence.
In an alternative embodiment, the electric butterfly valve is used for closing a heating steam pipe.
In an alternative embodiment, the heating steam parameters include temperature and pressure.
In an alternative embodiment, the pneumatic quick-closing regulating valve is connected to the electric shut-off valve and the electric temperature and pressure reducer, respectively, by means of a flow measuring device.
In an alternative embodiment, the pneumatic quick-closing regulating valve is used for regulating the flow of heating steam.
In an alternative embodiment, a heating steam header is used to deliver heating steam to the thermal consumer module.
The main scheme and each further option of the application can be freely combined to form a plurality of schemes, which are all schemes that can be adopted and claimed by the application; and the selection(s) of non-conflicting choices and other choices may be freely combined. Numerous combinations will be apparent to those skilled in the art upon review of the present application, and are not intended to be exhaustive or to be construed as limiting the scope of the utility model.
The application discloses power plant heating steam system, including the turbine group that is used for discharging heating steam, adjust pipeline closed check valve group, be used for adjusting heating steam parameter's main road heating steam pipeline, heating steam header and be used for matching the bypass heating steam pipeline of the required heating steam pipeline flow of user under the condition of heating low load, wherein bypass heating steam pipeline is including the electronic stop valve that connects gradually, a flowmeter, the temperature-reducing and pressure-reducing device, electric gate valve and first check valve, electric stop valve is connected with main road heating steam pipeline's one end and check valve group, first check valve respectively with main road heating steam pipeline's the other end and heating steam header. Through the bypass heat supply steam pipeline that sets up, under the circumstances that the heat load is low, heat supply steam flow is little, open valve and the temperature and pressure reduction device on the bypass can make heat supply steam get into heat supply steam header after the pressure reduction of heat supply steam, can solve electronic temperature and pressure reduction ware and can produce great noise and vibration's problem because of pressure drop increase around.
Drawings
Fig. 1 shows a schematic diagram of a prior art power plant heating steam system.
Fig. 2 shows a schematic structural diagram of a heating steam system of a power plant according to an embodiment of the present application.
Icon: 1-a check valve of a steam exhaust pipeline of a high-pressure cylinder; 2-pneumatic quick closing check valve; 3-pneumatic quick closing regulating valve; 4-a flow measurement device; 5-an electric temperature and pressure reducer; 6-an electric butterfly valve; 7-a second check valve; 8-a heating steam header; 9-a hot user module; 10-reheater.
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the embodiments is taken in conjunction with the accompanying drawings. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the prior art, for a generator set for providing industrial heat load, according to heat load requirements, after a check valve of a steam exhaust pipeline of a high-pressure cylinder (reheat cold section) is adopted, steam is extracted, cooled and decompressed, and then heat is supplied, and a specific connection mode is shown in fig. 1, wherein fig. 1 shows a schematic structural diagram of a heat supply steam system of a power plant adopted in the prior art.
The utility model provides a power plant heating steam system among the prior art is including being used for discharging heating steam's turbine group, the closed check valve group of adjusting pipeline, be used for adjusting heating steam's main road heating steam pipeline, heating steam header 8, wherein the turbine group is including the high-pressure jar HP, well pressure jar IP and the low pressure jar LP that connect gradually, and the steam outlet of high-pressure jar is connected to the check valve group through heating steam pipeline to discharge heating steam. The check valve group comprises a high-pressure cylinder steam exhaust pipeline check valve 1, a pneumatic quick closing check valve 2 and a pneumatic quick closing regulating valve 3 which are connected in sequence. The main way heat supply steam pipeline comprises an electric temperature and pressure reducer 5, an electric butterfly valve 6 and a second check valve 7 which are connected in sequence. The pneumatic quick-closing regulating valve 3 is connected with the electric temperature and pressure reducer 5 through a flow measuring device, and the second check valve 7, the heating steam header 8 and the heat user module 9 are sequentially connected.
The principle of the prior art is as follows: the heat supply steam is extracted from the high-pressure cylinder exhaust steam pipeline check valve 1, sequentially passes through the pneumatic quick closing check valve 2, the pneumatic quick closing regulating valve 3, the flow measuring device 4, the electric temperature and pressure reducer 5, the electric butterfly valve 6 and the second check valve 7, is connected into the heat supply steam header 8, and is connected into the heat user module 9 for use through a necessary pipeline. The flow of the heat supply steam of the cold section is regulated by a pneumatic quick-closing regulating valve, the pressure and the temperature of the heat supply steam are measured by a flow measuring device, the heat supply steam is regulated by an electric temperature and pressure reducer, and an electric butterfly valve is used for cutting off the heat supply steam.
However, when the heat load required by the peripheral heat users is higher, the heat supply steam flow is larger, and after the heat supply steam is regulated into the steam parameters required by the users through the electric temperature and pressure reducer, the heat supply steam enters the heat supply steam header 8 and is then conveyed to the heat users for use; when the heat load required by a heat user is lower, the flow of heat supply steam extracted from the reheating cold section becomes lower, and due to the operation characteristic of a unit, along with the reduction of the flow of heat supply of steam extraction, the pressure in front of the electric temperature-reduction pressure reducer is close to the steam discharge pressure of the high-pressure cylinder under the pure condensation working condition, so that the inlet steam pressure of the electric temperature-reduction pressure reducer is increased, when the flow of heat supply steam is reduced, the pressure drop of a heat supply pipeline outside a power plant is reduced, and the steam parameter required by the heat user is unchanged or even reduced, so that the outlet steam pressure of the electric temperature-reduction pressure reducer is reduced, and therefore, under the condition of low heat supply load, the electric temperature-reduction pressure reducer can generate larger noise and vibration due to the increase of front-back pressure drop, so that the safety and the operation reliability are greatly reduced.
In order to solve the above-mentioned problems, the present application provides a heat supply steam system of a power plant, please refer to fig. 2 based on fig. 1, fig. 2 shows a schematic structural diagram of the heat supply steam system of the power plant according to an embodiment of the present application, the system includes: a high-pressure cylinder steam exhaust pipeline as a heating steam source, a check valve group for adjusting pipeline closure, a main heating steam pipeline for adjusting heating steam parameters, a heating steam header 8 and a bypass heating steam pipeline for matching the flow of the heating steam pipeline required by a user under the condition of low heating load;
the bypass heat supply steam pipeline comprises an electric stop valve 11, a flowmeter 12, a temperature and pressure reducing device 13, an electric gate valve 14 and a first check valve 15 which are sequentially connected, wherein the electric stop valve 11 is connected with one end of the main heat supply steam pipeline and the check valve group, and the first check valve 15 is respectively connected with the other end of the main heat supply steam pipeline and the heat supply steam header 8.
The high-pressure cylinder exhaust pipeline comprises a high-pressure cylinder, a high-pressure cylinder exhaust pipeline check valve 1 for preventing gas from flowing back and a reheater 10 for receiving high-pressure cylinder exhaust, which are connected in sequence.
The heat supply steam system of the power plant further comprises a medium pressure cylinder and a low pressure cylinder which are connected in sequence, and the high pressure cylinder, the medium pressure cylinder and the low pressure cylinder are connected together through bearings.
The utility model provides a power plant heat supply steam system has gone out one section bypass heat supply steam pipeline at the external connection of main heat supply steam pipeline on prior art's basis, and this bypass pipeline pipe diameter is less relatively, and heat supply steam loops through electronic stop valve 11, flowmeter 12, temperature and pressure reduction device 13, electric gate valve 14, first check valve 15, gets into the heat supply steam header.
The exhaust port of the high-pressure cylinder HP is connected to the check valve set through a heat supply steam pipeline so as to exhaust heat supply steam, the check valve set comprises a pneumatic quick-closing check valve 2, a pneumatic quick-closing regulating valve 3 and a flow measuring device 4 which are sequentially connected, and the flow measuring device 4 is used for measuring the flow of the heat supply steam. The check valve is used for preventing the backflow of the heating steam, and the pneumatic quick-closing regulating valve 3 is used for regulating the closing of the pipeline.
The main road heating steam pipeline comprises an electric temperature-reducing pressure reducer 5, an electric butterfly valve 6 and a second check valve 7 which are sequentially connected, the electric butterfly valve 6 is used for closing the heating steam pipeline, the pneumatic quick-closing regulating valve 3 is respectively connected with the electric stop valve 11 and the electric temperature-reducing pressure reducer 5 through the flow measuring device 4, the pneumatic quick-closing regulating valve 3 is used for adjusting the flow of heating steam, and the flow measuring device 4 is used for measuring the flow of the heating steam. The heating steam header 8 is used for delivering heating steam to the heat consumer module 9.
The application provides a power plant heat supply steam system's theory of operation does: under the condition that the demand of a heat user on the heat load is high, the heat supply steam flow volume is increased, the heat supply steam passes through the turbine set, the check valve set and the main heat supply steam pipeline, the electric temperature and pressure reducer 5 adjusts the temperature and the pressure of the heat supply steam, and the heat supply steam enters the heat supply steam header 8 and is conveyed to the heat user module for heat supply users.
However, when the demand of the heat user on the heat load is low, the heat supply steam flow is reduced, the pipe diameter of the pipe is unchanged, the steam flow rate is reduced, the pressure drop of the heat supply pipe outside the power plant is reduced, the steam parameter is unchanged or even reduced, so that the outlet steam pressure of the electric temperature and pressure reducer 5 is reduced, and at the moment, the electric temperature and pressure reducer 5 can generate larger noise and vibration due to the increase of the front and rear pressure drops. At the moment, the electric temperature and pressure reducer on the main road is closed, the valve and the temperature and pressure reducing device on the bypass are opened, part of heat supply steam enters the heat supply steam header after being subjected to temperature and pressure reduction from the bypass and is then conveyed to a heat user for use, so that the heat supply steam enters the heat supply steam header after being subjected to temperature and pressure reduction, and the problem that the electric temperature and pressure reducer can generate larger noise and vibration due to the increase of front and back pressure drops is solved.
In addition, the power plant heating steam system that this application provided can also be applicable to the generating set that each grade provided industry thermal load, but the equal safe normal operating of different thermal load in face, and the noise that produces when its operation is low, and environmental cleaning can solve the problem of power plant heating steam system's security and operational reliability under the low load condition of heat supply, and is better to the adaptability of the wide load operation of unit heating, more energy-conservation.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (10)
1. A power plant heating steam system, comprising: a high-pressure cylinder steam exhaust pipeline as a heating steam source, a check valve group for adjusting pipeline closure, a main heating steam pipeline for adjusting heating steam parameters, a heating steam header (8) and a bypass heating steam pipeline for matching the flow of the heating steam pipeline required by a user under the condition of low heating load;
the bypass heat supply steam pipeline comprises an electric stop valve (11), a flowmeter (12), a temperature and pressure reducing device (13), an electric gate valve (14) and a first check valve (15) which are sequentially connected, wherein the electric stop valve (11) is connected with one end of the main heat supply steam pipeline and the check valve group, and the first check valve (15) is respectively connected with the other end of the main heat supply steam pipeline and the heat supply steam header (8).
2. A power plant heating steam system according to claim 1, characterized in that the high pressure cylinder exhaust pipe comprises a high pressure cylinder, a high pressure cylinder exhaust pipe check valve (1) for preventing reverse flow of gas and a reheater (10) receiving high pressure cylinder exhaust steam, which are connected in sequence.
3. A power plant heating steam system as claimed in claim 2, wherein the system further comprises a medium pressure cylinder and a low pressure cylinder connected in series, the high pressure cylinder, the medium pressure cylinder and the low pressure cylinder being connected together by bearings.
4. A power plant heating steam system according to claim 1, characterized in that the non-return valve group comprises a pneumatic quick-closing non-return valve (2), a pneumatic quick-closing regulating valve (3) and a flow measuring device (4) connected in sequence, the flow measuring device (4) being used for measuring the flow of the heating steam.
5. A power plant heating steam system according to claim 1, characterized in that the main heating steam pipe comprises an electric temperature and pressure reducer (5), an electric butterfly valve (6) and a second non-return valve (7) connected in sequence.
6. A power plant heating steam system according to claim 5, characterized in that the electric butterfly valve (6) is used for closing a heating steam pipe.
7. The power plant heating steam system of claim 1, wherein the heating steam parameters include temperature and pressure.
8. A power plant heating steam system according to claim 1, characterized in that the pneumatic quick-closing regulating valve (3) is connected with the electric shut-off valve (11) and the electric temperature and pressure reducer (5) respectively by means of a flow measuring device (4).
9. A power plant heating steam system according to claim 8, characterized in that the pneumatic quick-closing regulating valve (3) is used for regulating the flow of heating steam.
10. A power plant heating steam system according to claim 1, characterized in that a heating steam header (8) is used for conveying heating steam to the heat consumer module (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320977034.0U CN220203983U (en) | 2023-04-26 | 2023-04-26 | Heat supply steam system of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320977034.0U CN220203983U (en) | 2023-04-26 | 2023-04-26 | Heat supply steam system of power plant |
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| Publication Number | Publication Date |
|---|---|
| CN220203983U true CN220203983U (en) | 2023-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320977034.0U Active CN220203983U (en) | 2023-04-26 | 2023-04-26 | Heat supply steam system of power plant |
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| CN (1) | CN220203983U (en) |
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- 2023-04-26 CN CN202320977034.0U patent/CN220203983U/en active Active
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