CN212359872U - Combined heat and power generation unit with shunt control - Google Patents
Combined heat and power generation unit with shunt control Download PDFInfo
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- CN212359872U CN212359872U CN202020754134.3U CN202020754134U CN212359872U CN 212359872 U CN212359872 U CN 212359872U CN 202020754134 U CN202020754134 U CN 202020754134U CN 212359872 U CN212359872 U CN 212359872U
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Abstract
The utility model discloses a combined heat and power generation unit with flow distribution control, combined heat and power generation unit includes: boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder, generating set, condenser, heat supply steam header and steam flash tank, wherein: the generator set and the condenser are arranged at the low-pressure cylinder of the steam turbine; the condenser comprises a steam chamber and a water chamber, and the water chamber is connected with a condensed water main pipe; the heat supply steam header is supplied to a user through one path of an eighth steam supply pipeline, and the other path of the heat supply steam header is connected with the steam flash tank; the steam flash tank is connected to the steam chamber through a pipeline and is connected to the water chamber through a pipeline; one path of the condensed water mother pipe is connected to the steam flash tank. The embodiment of the utility model provides an in can adjust the outside heat supply steam flow of heat supply steam header in a flexible way, with steam working medium recycle again simultaneously, avoid the economic loss that steam working medium did not retrieve and cause.
Description
Technical Field
The utility model relates to an electric power tech field especially relates to a combined heat and power generation unit with flow distribution control.
Background
Responding to the requirements of national energy-saving and environment-friendly policies, industrial small boilers are gradually eliminated, and peripheral condensing generator sets are replaced by the industrial small boilers, and steam supply to heat-consuming enterprises is realized through steam extraction. The problems of complex process, large engineering quantity, long time and the like exist in the steam turbine body punching and steam extraction, and a method of punching and steam extraction from a steam turbine intermediate pressure cylinder communicating pipe and a high pressure cylinder steam exhaust pipe (namely a reheater cold section) is widely adopted. The steam extraction and heat supply of the intermediate pressure cylinder communicating pipe is suitable for hot users with low pressure and low temperature requirement but large steam consumption, the steam extraction of the cold section of the reheater is suitable for hot users with high pressure and high temperature, the two steam extraction and heat supply modes can realize both power generation and outward steam supply under the condition that the steam turbine body is not modified, the steam parameter requirements of most of user enterprises can be met, and therefore the steam extraction and heat supply system is widely applied. However, after the pure condensing steam turbine generator unit is subjected to heat supply transformation, the existing structure cannot flexibly adjust the heat supply steam header to supply heat steam outwards and simultaneously recycle the heat steam based on the steam working medium, so that the economic cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the not enough of prior art, the utility model provides a combined heat and power units with split-flow control has solved current combined heat and power units and can't realize adjusting heat supply steam header in a flexible way and supply with hot steam outward and carry out recycle based on steam working medium simultaneously, through the utility model discloses the structure setting of unit can adjust heat supply steam header outside heat supply steam flow in a flexible way, realizes not influencing the normal production of heat-consuming enterprise simultaneously, again with steam working medium recycle simultaneously, avoids the steam working medium not to retrieve the economic loss who causes.
In order to solve the technical problem, an embodiment of the utility model provides a combined heat and power generation unit with split flow control, combined heat and power generation unit includes: boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder, generating set, condenser, heat supply steam header and steam flash tank, wherein:
the boiler is connected with the steam turbine high-pressure cylinder through a steam supply pipeline, the boiler is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, the steam turbine high-pressure cylinder is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, and the steam turbine intermediate-pressure cylinder is connected with the steam turbine low-pressure cylinder through a steam supply pipeline;
the generator set and the condenser are arranged at the low-pressure cylinder of the steam turbine;
the condenser comprises a steam chamber and a water chamber, and the water chamber is connected with a condensed water main pipe;
the heat supply steam header is connected to a steam extraction port of the steam turbine through a steam extraction pipeline, and the heat supply steam header is supplied to a user through one path of an eighth steam supply pipeline, and the other path of the heat supply steam header is connected with the steam flash tank;
the steam flash tank is connected to the steam chamber through a pipeline and is connected to the water chamber through a pipeline; one path of the condensed water main pipe is used for draining water, and the other path of the condensed water main pipe is connected to the steam flash tank.
The steam extraction pipeline is provided with a steam extraction pressure measuring device, a steam extraction temperature measuring device, a front stop valve of the steam extraction regulating valve, a steam extraction regulating valve and a rear stop valve of the steam extraction regulating valve.
The eighth supplies to be provided with on the vapour pipeline and supplies stop valve before the vapour governing valve, supplies the stop valve behind the vapour governing valve, heat supply steam pressure measuring device, heat supply steam temperature measuring device supplies the vapour flow tester, supplies vapour flow restriction orifice, wherein:
the steam supply flow throttling orifice is arranged on the horizontal straight pipe section of the eighth steam supply pipeline; and a heat supply steam temperature measuring device and a heat supply steam pressure measuring device are arranged in front of the steam flow throttling orifice plate.
And the eighth steam supply pipeline is connected with the steam flash tank through a front stop valve of the steam flash tank regulating valve, the steam flash tank regulating valve and a rear stop valve of the steam flash tank regulating valve.
The condensed water main pipe is provided with a condensed water pump and a condensed water check valve, and the steam flash tank is connected with the condensed water check valve through a water spraying temperature reduction regulating valve.
And a steam pressure measuring device of the heat supply steam header is arranged on the heat supply steam header.
And a heating steam header steam temperature measuring device is arranged on the heating steam header.
And a safety valve is arranged on the heat supply steam header.
The heat supply steam header is provided with a steam supply header sewage pipeline.
And a blowdown valve of the steam supply header is arranged on the blowdown pipeline of the steam supply header.
In the embodiment of the utility model, this embodiment can accomplish the data measurement of the heat supply load of steam extraction heat supply generating set, after obtaining the heat supply load data, can effectively instruct the power grid dispatching department to the dispatch function of generator unit under the circumstances of guaranteeing the heat supply, participate in the regulation of power grid peak valley with the heat supply unit degree of depth, consume clean energy such as water, wind, light, nuclear on a large scale; in the corresponding scheduling process, heat can be flexibly supplied to heat users, and the normal production of heat utilization enterprises is met. Under the condition that the heat user can not adjust the heat supply steam flow, the method of shunting the heat supply steam by the steam flash tank can be adopted, the outward heat supply steam flow of the heat supply steam header can be flexibly adjusted, the normal production of heat using enterprises is not influenced, and meanwhile, the steam working medium is recycled, so that the economic loss caused by the fact that the steam working medium is not recycled is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a cogeneration unit with split control in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Specifically, fig. 1 shows a schematic structural diagram of a cogeneration unit with split-flow control in an embodiment of the present invention, the cogeneration unit includes: boiler 36, high-pressure turbine cylinder 37, medium-pressure turbine cylinder 38, low-pressure turbine cylinder 39, generator set 29, condenser 31, heating steam header 6 and steam flash tank 22.
Specifically, boiler 36 is supplied from a pipeline 361, boiler 36 and turbine high-pressure cylinder 37 are connected by a steam supply pipeline, boiler 36 and turbine intermediate-pressure cylinder 38 are connected by a steam supply pipeline, turbine high-pressure cylinder 37 and turbine intermediate-pressure cylinder 38 are connected by a steam supply pipeline, and turbine intermediate-pressure cylinder 38 and turbine low-pressure cylinder 39 are connected by a steam supply pipeline; the turbine low-pressure cylinder 39 is provided with a generator set 29 and a condenser 31; the condenser 31 comprises a steam chamber 311 and a water chamber 312, and the water chamber 312 is connected with a condensed water main pipe 32; the heat supply steam header 6 is connected to a steam extraction port of the steam turbine through a steam extraction pipeline 34, one path of the heat supply steam header 6 is supplied to a user through an eighth steam supply pipeline 33, and the other path is connected with the steam flash tank 22; the steam flash tank 22 is connected to the steam chamber 311 through a pipeline, and is connected to the water chamber 312 through a pipeline; the condensed water main pipe 32 is used for draining water in one path, and is connected to the steam flash tank 22 in the other path.
Specifically, be provided with extraction pressure measuring device 1 on the extraction pipeline 34, extraction temperature measuring device 2, stop valve 3 before the extraction governing valve, extraction governing valve 4, stop valve 5 behind the extraction governing valve, wherein: the heat supply steam header 6 is connected with the steam extraction regulating valve rear stop valve 5, the steam extraction regulating valve 4 and the steam extraction regulating valve front stop valve 3 through a steam extraction pipeline 34 and a steam extraction port of the steam turbine; and a steam extraction pressure measuring device 1 and a steam extraction temperature measuring device 2 are arranged on a pipeline between the rear stop valve 5 of the steam extraction regulating valve and a steam extraction port of the steam turbine. The turbine extraction opening is located on the sixth steam supply pipeline 381, and the heating steam extracted by the turbine extraction opening is supplied to the pipeline of the turbine low pressure cylinder 39 from the turbine intermediate pressure cylinder 38.
Specifically, a front stop valve 7 of a steam supply regulating valve, a steam supply regulating valve 8, a rear stop valve 9 of the steam supply regulating valve, a heat supply steam pressure measuring device 10, a heat supply steam temperature measuring device 11, a steam supply flow tester 12, a steam supply flow throttling orifice plate 13 and a steam supply flow throttling orifice plate 13 are arranged on a horizontal straight pipe section of the eighth steam supply pipeline 33; and a heating steam temperature measuring device 11 and a heating steam pressure measuring device 10 are arranged in front of the steam flow throttling orifice plate 13. The heat supply steam header 6 is connected with a front stop valve 7 of a steam supply regulating valve, a steam supply regulating valve 8 and a rear stop valve 9 of the steam supply regulating valve through a steam supply pipeline 33, and a steam supply flow measuring device comprising a steam supply flow throttling orifice 13 and a steam supply flow tester 12 is arranged on the steam supply pipeline 33; the steam supply flow throttling orifice plate 13 is arranged on the horizontal straight pipe section; a heating steam temperature measuring device 11 and a heating steam pressure measuring device 10 are arranged in front of the steam flow throttling orifice 13.
Specifically, the eighth steam supply pipeline 33 is connected to the steam flash tank 22 via the steam flash tank regulating valve front stop valve 17, the steam flash tank regulating valve 19, and the steam flash tank regulating valve rear stop valve 20 based on the air supply sub-pipeline 331. The eighth steam supply pipeline 33 may provide heat energy directly to the user in one path, and may provide steam heat energy to the steam flash tank 22 in the other path.
Specifically, the upper part of the steam flash tank 22 is connected with the steam chamber 311 of the condenser 31 through the steam pipe 223, and the steam which is not condensed into water enters the steam chamber 311 of the condenser 31 through the steam pipe 223 and is cooled and condensed into water for recycling; the lower part of the steam flash tank 22 is connected with the water chamber 312 of the condenser 31 through the water flowing pipe 222, and the steam entering the steam flash tank 22 is cooled by the water sprayed, temperature reduced and condensed water to be condensed into water, and then flows into the water chamber 312 of the condenser 31 together for recycling. The condensate water main pipe 32 connected with the condenser 31 is provided with a condensate pump 25 and a condensate water check valve 24, the steam flash tank 22 is connected with the condensate water check valve 24 through a water spray temperature reduction regulating valve 23, the condensate water main pipe 32 after the water spray temperature reduction condensate water comes from the check valve 24 is arranged through the structure and enters the steam flash tank 22 through the water spray temperature reduction regulating valve 23, and the condensate water in the condensate water main pipe 32 comes from the condensate water in the condenser boosted by the condensate pump 25.
Specifically, a heating steam header steam pressure measuring device 14 is arranged on the heating steam header 6, a heating steam header steam temperature measuring device 15 is arranged on the heating steam header, and a safety valve 16 is arranged on the heating steam header. A safety valve 16, a heating steam header steam temperature measuring device 15 and a heating steam header steam pressure measuring device 14 are installed on the heating steam header 6, the overpressure safety valve 16 serves as an overpressure protection device of the heating steam header 6, and when the overpressure safety value is exceeded, the heating steam header 6 depressurizes the empty exhaust steam to prevent the heating steam header 6 from being damaged by overpressure.
Specifically, the heat supply steam header 6 is provided with a steam supply header blowdown pipeline 611, the steam supply header blowdown pipeline 611 is provided with a steam supply header blowdown valve 18, the steam supply header blowdown pipeline 611 can realize blowdown treatment, and the steam supply header blowdown valve 18 can be operated and controlled to complete an external blowdown process.
Specifically, the boiler 36 is connected to the turbine high-pressure cylinder 37 through a first steam supply pipe 365, and is connected to the turbine medium-pressure cylinder 38 through a second steam supply pipe 366; turbine high-pressure cylinder 37 is connected to boiler 36 based on third steam supply pipe 362, and turbine high-pressure cylinder 37 and turbine intermediate-pressure cylinder 38 are connected based on fourth steam supply pipe 369; turbine intermediate pressure cylinder 38 is connected to turbine low pressure cylinder 39 based on fifth steam supply conduit 382 and sixth steam supply conduit 381.
Specifically, the first steam supply pipeline 365 is provided with a first stop valve 367 and a first turbine regulating valve 35, and the stop valve 367 and the first turbine regulating valve 35 can realize the function of regulating the gas flow of the turbine high-pressure cylinder 37 by the boiler 36 on the first steam supply pipeline 365.
Specifically, the second steam supply pipeline 366 is provided with a second steam turbine regulating valve 360, and the second steam turbine regulating valve 360 can realize the function of regulating the gas flow of the steam turbine high-pressure cylinder 37 by the boiler 36 on the second steam supply pipeline 366.
Specifically, the third steam supply pipeline 362 is provided with two check valve steam supply pipelines, the two check valve steam supply pipelines are provided with a first high-pressure cylinder check valve 368 and a second high-pressure cylinder check valve 370, the two check valve steam supply pipelines are connected with the steam turbine high-pressure cylinder 37 based on a parallel connection mode, and the third steam supply pipeline 362 is connected with the boiler 36 through the two check valve steam supply pipelines which are output in parallel to one steam supply pipeline.
Specifically, a third turbine regulating valve 364 is disposed between the first steam supply pipeline 365 and the third steam supply pipeline 362, the third turbine regulating valve is located on the seventh steam supply pipeline 364, one end of the seventh steam supply pipeline 364 is connected to the first steam supply pipeline 365, and the other end is connected to the third steam supply pipeline 362.
Specifically, this condenser includes steam chamber 311 and hydroecium 312, and this hydroecium is connected with condensate water mother pipe 32, is provided with condensate water pump 25 and condensate water check valve 24 on the condensate water mother pipe 32, can realize carrying out the discharge function to the condensate water in hydroecium 312 based on condensate water mother pipe 32 and condensate water pump 25, and condensate water check valve 24 can prevent that water is contrary to getting into hydroecium 312 based on condensate water mother pipe 32.
In the specific implementation process, the steam extraction temperature measuring device 2 and the heat supply steam temperature measuring device 11 adopt E-type thermocouples; the steam extraction pressure measuring device 1 and the heating steam pressure measuring device 10 adopt EJA or Rosemount series pressure transmitters; the steam supply flow throttling orifice 13 adopts an angle connection pressure taking or flange pressure taking standard orifice; the front stop valve 3 of the steam extraction regulating valve, the front stop valve 7 of the steam supply regulating valve, the rear stop valve 9 of the steam supply regulating valve, the front stop valve 17 of the steam flash tank regulating valve, the blowdown valve 18 of the steam supply header and the rear stop valve 20 of the steam flash tank regulating valve adopt bellows stop valves; the steam flow tester 12 adopts an EJA or Rosemount series flow differential pressure transmitter to respectively realize the conversion of temperature, pressure and flow signals into electric signals; the steam extraction regulating valve 4, the steam supply regulating valve 8 and the steam flash tank regulating valve 19 adopt pneumatic regulating valves or electric regulating valves; the safety valve 16 may be a pulse type safety valve.
In the embodiment of the utility model, this embodiment can accomplish the data measurement of the heat supply load of steam extraction heat supply generating set, after obtaining the heat supply load data, can effectively instruct the power grid dispatching department to the dispatch function of generator unit under the circumstances of guaranteeing the heat supply, participate in the regulation of power grid peak valley with the heat supply unit degree of depth, consume clean energy such as water, wind, light, nuclear on a large scale; in the corresponding scheduling process, heat can be flexibly supplied to heat users, and the normal production of heat utilization enterprises is met. Under the condition that the heat user can not adjust the heat supply steam flow, the method of shunting the heat supply steam by the steam flash tank can be adopted, the outward heat supply steam flow of the heat supply steam header can be flexibly adjusted, the normal production of heat using enterprises is not influenced, and meanwhile, the steam working medium is recycled, so that the economic loss caused by the fact that the steam working medium is not recycled is avoided.
The embodiments of the present invention have been described in detail, and the principle and the implementation of the present invention are explained herein by using specific embodiments, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. A cogeneration unit with split control, the cogeneration unit comprising: boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder, generating set, condenser, heat supply steam header and steam flash tank, wherein:
the boiler is connected with the steam turbine high-pressure cylinder through a steam supply pipeline, the boiler is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, the steam turbine high-pressure cylinder is connected with the steam turbine intermediate-pressure cylinder through a steam supply pipeline, and the steam turbine intermediate-pressure cylinder is connected with the steam turbine low-pressure cylinder through a steam supply pipeline;
the generator set and the condenser are arranged at the low-pressure cylinder of the steam turbine;
the condenser comprises a steam chamber and a water chamber, and the water chamber is connected with a condensed water main pipe;
the heat supply steam header is connected to a steam extraction port of the steam turbine through a steam extraction pipeline, and the heat supply steam header is supplied to a user through one path of an eighth steam supply pipeline, and the other path of the heat supply steam header is connected with the steam flash tank;
the steam flash tank is connected to the steam chamber through a pipeline and is connected to the water chamber through a pipeline; one path of the condensed water main pipe is used for draining water, and the other path of the condensed water main pipe is connected to the steam flash tank.
2. Cogeneration unit with split flow control according to claim 1, characterized in that said extraction duct is provided with an extraction pressure measuring device, an extraction temperature measuring device, an extraction regulating valve front stop valve, an extraction regulating valve rear stop valve.
3. The cogeneration unit with split flow control of claim 1, wherein said eighth steam supply pipeline is provided with a front stop valve of a steam supply regulating valve, a rear stop valve of a steam supply regulating valve, a heat supply steam pressure measuring device, a heat supply steam temperature measuring device, a steam supply flow tester, and a steam supply flow orifice plate, wherein:
the steam supply flow throttling orifice is arranged on the horizontal straight pipe section of the eighth steam supply pipeline; and a heat supply steam temperature measuring device and a heat supply steam pressure measuring device are arranged in front of the steam flow throttling orifice plate.
4. The cogeneration unit with split flow control of claim 3, wherein said eighth steam supply conduit is connected to the steam flash tank through the steam flash tank regulating valve front stop valve, the steam flash tank regulating valve rear stop valve.
5. The cogeneration unit with split flow control of claim 1, wherein said condensate header is provided with a condensate pump and a condensate check valve, and said steam flash tank is connected to said condensate check valve through a water spray attemperation control valve.
6. Cogeneration plant with split flow control according to any of claims 1 to 5, wherein said heating steam headers are provided with heating steam header steam pressure measuring means.
7. Cogeneration plant with split flow control according to any of claims 1 to 5, wherein said heating steam headers are provided with heating steam header steam temperature measuring means.
8. Cogeneration plant with split flow control according to any of claims 1 to 5, characterized in that said heating steam header is provided with a safety valve.
9. Cogeneration plant with split flow control according to any of claims 1 to 5, wherein said heating steam header is provided with a steam supply header blowdown conduit.
10. Cogeneration unit with split flow control according to claim 9, wherein said steam supply header blowdown conduit is provided with a steam supply header blowdown valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020754134.3U CN212359872U (en) | 2020-05-09 | 2020-05-09 | Combined heat and power generation unit with shunt control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020754134.3U CN212359872U (en) | 2020-05-09 | 2020-05-09 | Combined heat and power generation unit with shunt control |
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| CN212359872U true CN212359872U (en) | 2021-01-15 |
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| CN202020754134.3U Active CN212359872U (en) | 2020-05-09 | 2020-05-09 | Combined heat and power generation unit with shunt control |
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