CN113236383A - Deep thermoelectric decoupling thermodynamic system of coupling heat supply back pressure machine - Google Patents
Deep thermoelectric decoupling thermodynamic system of coupling heat supply back pressure machine Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
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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 invention relates to the technical field of cogeneration equipment, and particularly discloses a deep thermoelectric decoupling thermodynamic system of a coupled heat supply back pressure machine, which comprises a heat supply back pressure machine, a high pressure cylinder, a medium and low pressure cylinder and a generator which are sequentially and coaxially connected, and further comprises a main steam pipeline, a reheat steam pipeline and a boiler which is respectively communicated with the main steam pipeline and the reheat steam pipeline; the main steam pipeline is respectively connected with the heat supply back pressing machine and the high-pressure cylinder; the reheating steam pipeline is respectively connected with the heat supply back pressure machine and the medium-low pressure cylinder; the heat supply back pressing machine can select steam inlet sources according to different unit loads to ensure stable heat load. The invention can meet the industrial heat load and realize the deep peak regulation of the unit, and has the characteristics of large thermoelectric ratio and deep thermoelectric decoupling.
Description
Technical Field
The invention relates to the technical field of cogeneration equipment, in particular to a deep thermoelectric decoupling thermodynamic system of a coupled heat supply back pressure machine.
Background
The cogeneration centralized heating has the advantages of high energy comprehensive utilization efficiency, energy conservation, environmental protection and the like, is one of main heat sources and heating modes of the centralized heating of cities and industrial parks, and realizes the centralized heating by planning and constructing public cogeneration projects in the industrial parks mainly based on the industrial heat load according to the notice (2016 (617) about the printing < the cogeneration management method) issued by the union of five commissions.
Meanwhile, the development of coal-fired thermal power generation enterprises in China enters a new normal state at present, and the large-scale operation of new energy further compresses the share of thermal power generating units in the power generation market, so that the heat-power generating units are necessary for relieving the contradiction between heat supply and power supply, improving the thermoelectric ratio of the units and realizing deep thermoelectric decoupling.
At present, the steam extraction adjusting means of the industrial steam extraction cogeneration unit with the parameter of 1.0 MPa-3.0 MPa mainly comprises the steps of adjusting steam extraction by a cylinder valve, adjusting steam extraction by a rotary clapboard and adjusting steam extraction by a middle exhaust butterfly valve. The steam extraction adjusting means can meet the requirement of industrial steam extraction at rated load, but is limited by the limit condition of safe operation of the unit, the thermoelectric ratio of the unit is low, and the thermoelectric decoupling capacity is limited.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a deep thermoelectric decoupling thermodynamic system of a coupling heat supply back pressure machine; the method meets the industrial heat load, realizes the deep peak regulation of the unit, and has the characteristics of large thermoelectric ratio and deep thermoelectric decoupling.
The technical problem to be solved by the invention is as follows:
a deep thermoelectric decoupling thermal system of a coupling heat supply back pressure machine comprises the heat supply back pressure machine, a high pressure cylinder, a medium and low pressure cylinder, a generator, a main steam pipeline, a reheat steam pipeline and a boiler, wherein the steam exhaust end of the heat supply back pressure machine is provided with a bypass pipeline of the heat supply back pressure machine;
the heat supply back pressure machine, the high pressure cylinder, the medium and low pressure cylinder and the generator are coaxially arranged and are sequentially connected;
the main steam pipeline is respectively connected with the heat supply back pressing machine and the high-pressure cylinder;
the reheating steam pipeline is respectively connected with the heat supply back pressure machine and the medium-low pressure cylinder;
and the heat supply back pressing machine bypass pipeline is respectively connected with the main steam pipeline and the secondary main steam pipeline.
The invention selects a reasonable steam source position of the heat supply back pressure machine according to the industrial steam extraction parameters by arranging the heat supply back pressure machine which is coaxial with the steam turbine, and the exhausted steam of the heat supply back pressure machine enters the industrial steam extraction heat supply network. The high pressure cylinder and the medium and low pressure cylinder of the steam turbine adjust the electric load of the unit; when the electrical load of the turbine is changed or at the rated load, the main steam pipeline or the reheat steam pipeline is adopted to realize heat supply to the heat supply back pressure machine, so that the stability of the thermal load of the unit is ensured, and the decoupling of the electrical load and the thermal load of the unit is realized.
In some possible embodiments, in order to effectively realize steam supply for the hot-pressing back press and the high-pressure cylinder; the main steam pipeline comprises a main steam pipeline and a bypass pipeline II, wherein the main steam pipeline is respectively communicated with a superheater and a high-pressure cylinder of the boiler; and the steam exhaust end of the bypass pipeline II is connected with a bypass pipeline of the heat supply back pressure machine.
In some possible embodiments, in order to effectively realize steam supply for the hot-pressing back press and the medium-low pressure cylinder; the reheating steam pipeline comprises a reheating steam pipeline and a bypass pipeline IV, wherein the reheating steam pipeline is respectively communicated with a reheater and a medium-low pressure cylinder of the boiler, and the bypass pipeline IV is connected with the reheating steam pipeline and the heat supply back pressure machine; the steam exhaust end of the bypass pipeline IV is connected with a bypass pipeline of the heat supply back pressure machine; and the bypass pipeline four and the bypass pipeline two are connected with the heat supply back pressure machine through connecting pipes.
In some possible embodiments, in order to effectively realize different selections of steam sources at the steam inlet end of the heat supply back press according to different loads of the steam turbine; a main steam source switching valve is arranged on the bypass pipeline II; and a reheat steam source switching valve is arranged on the fourth bypass pipeline.
And the connecting pipe is provided with a steam inlet regulating valve.
In some possible embodiments, in order to effectively achieve thermal load stabilization during deep peak shaving of the unit, the heating backpressure machine bypass pipeline is provided with a heating bypass valve.
In some possible embodiments, the main steam line further comprises a first bypass line connected to the main steam line and the high pressure cylinder, respectively.
In some possible embodiments, the reheat steam line further includes a third bypass line connected to the reheat steam line and the intermediate and low pressure cylinders, respectively.
In some possible embodiments, the steam exhaust end of the heat supply back-press is provided with a back-press steam exhaust pipeline; and the heat supply backpressure machine bypass pipeline is connected with a backpressure machine steam exhaust pipeline.
In some possible embodiments, the heat supply back pressure machine adopts a nozzle steam distribution mode, and a regulating stage is arranged, so that the throttling degree of a valve of the heat supply back pressure machine when the electric load of the unit is high is reduced, and the economy of the unit is improved.
Compared with the prior art, the invention has the beneficial effects that:
the invention meets the requirement of the industrial steam extraction of the unit by adding the heat supply back pressure machine, and improves the utilization efficiency of energy;
the invention effectively realizes the heat and power decoupling of the cogeneration unit, greatly reduces the electric load of the unit under the condition of ensuring the stability of the industrial steam extraction heat load of the unit, and realizes the aims of large thermoelectric ratio and deep heat and power decoupling;
the invention can switch to different pipelines according to the requirement of meeting the industrial extraction steam or not by matching the main steam pipeline and the reheating steam pipeline, and can ensure that the heat load of the machine is kept stable by supplementing the industrial extraction steam flow or improving the steam inlet pressure of the heat supply back pressure machine.
Drawings
FIG. 1 is a schematic diagram of the connection relationship of the present invention;
FIG. 2 is a graph showing the load comparison of the present invention with a conventional extraction scheme;
wherein: 1. a heat supply back press; 2. a high pressure cylinder; 3. a medium-low pressure cylinder; 4. a generator; 5. a boiler; 501. a superheater; 502. a reheater; 6. a main steam line; 7. a high pressure regulating valve; 8. a high discharge steam line; 9. a reheat steam line; 10. a bypass pipeline II; 11. a bypass pipeline IV; 12. a back press bypass conduit; 13. a main steam source switching valve; 14. a reheat steam source switching valve; 15. a heat supply bypass valve; 16. a back press steam exhaust conduit; 17. a bypass pipeline I; 18. a bypass pipeline III; 19. a connecting pipe; 20. an air inlet regulating valve.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The use of the terms "a" and "an" and "the" and similar referents in the context of describing the invention are not intended to be exhaustive or to limit the scope of the invention to the precise form disclosed. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
In the implementation of the present application, "and/or" describes an association relationship of associated objects, which means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone.
In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, the plurality of positioning posts refers to two or more positioning posts.
The invention is further illustrated with reference to the following figures and examples.
The invention is realized by the following technical scheme, as shown in figure 1,
a deep thermoelectric decoupling thermal system of a coupling heat supply back press comprises a heat supply back press 1, a high-pressure cylinder 2, a medium-low pressure cylinder 3, a generator 4, a main steam pipeline, a reheat steam pipeline and a boiler 5, wherein a steam exhaust end of the heat supply back press is provided with a bypass pipeline 12 of the heat supply back press;
the heat supply back pressure machine, the high pressure cylinder, the medium and low pressure cylinder and the generator are coaxially arranged and are sequentially connected;
the main steam pipeline is respectively connected with the heat supply back pressing machine 1 and the high-pressure cylinder 2;
the reheating steam pipeline is respectively connected with the heat supply back pressing machine 1 and the middle and low pressure cylinder 3;
the heat supply back press bypass pipeline 12 is respectively connected with a main steam pipeline and a secondary main steam pipeline.
The invention selects a reasonable steam source position of the heat supply back pressure machine according to the industrial steam extraction parameters by arranging the heat supply back pressure machine which is coaxial with the steam turbine, and the exhausted steam of the heat supply back pressure machine enters the industrial steam extraction heat supply network. When the electrical load of the turbine is changed or at the rated load, the main steam pipeline or the reheat steam pipeline is adopted to realize heat supply to the heat supply back pressure machine, so that the stability of the thermal load of the unit is ensured, and the decoupling of the electrical load and the thermal load of the unit is realized.
The heat supply back press bypass pipeline 12 is externally connected with an industrial steam extraction and heat supply network.
The steam exhaust end of the heat supply back press 1 is used as a steam extraction port of an industrial steam extraction and heat supply heat network, and the industrial steam extraction parameters are used as the design basis of the steam exhaust parameters of the back pressure turbine.
The high pressure cylinder 2 and the medium and low pressure cylinder 3 mainly play the roles of providing electric load and flexibly adjusting peak.
According to the invention, by arranging the heat supply back pressing machine 1 which is coaxial with the steam turbine, a reasonable steam source position of the heat supply back pressing machine 1 is selected according to industrial steam extraction parameters, and steam discharged by the heat supply back pressing machine 1 enters an industrial steam extraction heat supply network;
when the load is rated, the heat supply back press 1 supplies steam through a reheating steam pipeline; then steam is supplied to an industrial steam extraction and heat supply network through a steam exhaust end of the heat supply back press 1;
when the electric load of the steam turbine is continuously reduced and the reheat steam parameters cannot meet the industrial steam extraction requirement, the reheat steam pipeline is closed, steam supply to the heat supply back pressing machine 1 is realized by adopting the main steam pipeline, the heat load of the unit is ensured to be stable, and therefore the decoupling of the electric load and the heat load of the unit is realized.
In order to effectively realize steam supply to a hot-pressing back press and a high-pressure cylinder; the main steam pipeline comprises a main steam pipeline 6 and a bypass pipeline II 10, wherein the main steam pipeline 6 is respectively communicated with the superheater 501 and the high-pressure cylinder of the boiler 5, and the bypass pipeline II is connected with the main steam pipeline 6 and the heat supply back pressing machine 1; and the steam exhaust end of the second bypass pipeline 10 is connected with a heat supply back pressure machine bypass pipeline 12.
In some possible embodiments, in order to effectively realize steam supply for the hot-pressing back press and the medium-low pressure cylinder; the reheating steam pipeline comprises a reheating steam pipeline 9 and a bypass pipeline four 11, wherein the reheating steam pipeline 9 is respectively communicated with a reheater 502 of the boiler 5 and the middle-low pressure cylinder, and the bypass pipeline four 11 is connected with the reheating steam pipeline 9 and the heat supply back pressure machine 1; the steam exhaust end of the bypass pipeline IV 11 is connected with a heat supply back pressure machine bypass pipeline 12; the fourth bypass pipeline 11 and the second bypass pipeline 10 are connected with the heat supply back pressing machine 1 through a connecting pipe 19.
In some possible embodiments, in order to effectively realize different selections of steam sources at the steam inlet end of the heat supply back press according to different loads of the steam turbine; a main steam source switching valve 13 is arranged on the second bypass pipeline 10; a reheat steam source switching valve 14 is provided in the bypass line four 11.
The connecting pipe 19 is provided with a steam inlet regulating valve 20.
In some possible embodiments, the heating back press bypass pipe 12 is provided with a heating bypass valve 15.
In some possible embodiments, the main steam line further comprises a first bypass line 17 connected to the main steam line 6 and the high pressure cylinder 2, respectively.
Preferably, a high-pressure regulating valve 7 is arranged on the bypass pipeline I17; and when the unit operates, the steam inlet amount of the high-pressure cylinder is adjusted by changing the opening of the high-pressure regulating valve, so that the electric load of the unit is adjusted.
In some possible embodiments, the reheat steam line further includes a bypass line three 18 connected to the reheat steam line 9 and the intermediate low pressure cylinder 3, respectively.
In some possible embodiments, the steam exhaust end of the heating back press 1 is provided with a back press steam exhaust pipe 16; the heat supply backpressure machine bypass pipeline 12 is connected with a backpressure machine steam exhaust pipeline 16.
The steam exhaust end of the heat supply back press bypass pipeline 12 and the exhaust end of the heat supply back press transmit steam to an industrial steam extraction and heat supply network through a back press steam exhaust pipeline 16.
The invention optimally designs a cogeneration steam turbine for industrial steam extraction, selects a reasonable steam source position of the heat supply back pressing machine 1 according to industrial steam extraction parameters by arranging the heat supply back pressing machine 1 coaxial with the steam turbine, and discharges steam from the heat supply back pressing machine 1 to enter an industrial steam extraction heat supply network.
According to the difference of the steam turbine load, the steam source at the steam inlet end of the heat supply back pressing machine 1 has different choices:
when the unit is at a rated load, a steam source at the steam inlet end of the heat supply back pressure machine 1 comes from the reheat steam pipeline 9, at the moment, the reheat steam source switching valve 14 is opened, the main steam source switching valve 13 is in a closed state, and the steam inlet regulating valve 20 is in a state of reserving a certain throttle;
when the electrical load of the steam turbine changes, the thermal load of the unit is ensured to be stable by changing the opening of the steam inlet regulating valve 20, so that the electrical load and the thermal load of the unit are decoupled.
When the load of the unit is reduced, the steam inlet regulating valve 20 is gradually opened to keep the industrial steam extraction parameters stable;
when the load of the unit is continuously reduced and the steam inlet regulating valve 20 is completely opened, the main steam source switching valve 13 is opened, the reheat steam source switching valve 14 is closed, the steam source of the heat supply back press is switched to main steam, and the industrial steam extraction parameters are kept stable;
when the unit is in deep peak regulation operation, the steam source of the heat supply back pressure machine is the main steam which still can not meet the heat load requirement, the heat supply bypass valve 15 is opened to supplement the industrial steam extraction flow, and the heat supply requirement of the unit is met.
Preferably, the heat supply back pressing machine 1 adopts a nozzle steam distribution mode, and a regulating stage is arranged, so that the throttling degree of a valve of the heat supply back pressing machine 1 when the electric load of the unit is high is reduced, and the economy of the unit is improved.
In some possible embodiments, a feedwater regenerative system (not shown) is further included, and the feedwater regenerative system is respectively communicated with the high-pressure cylinder 2, the medium-low pressure cylinder 3 and the boiler 5. The recycling of the whole system for the steam is effectively realized through the water supply system.
In some possible embodiments, the high pressure cylinder 2 is connected to the reheater 502 of the boiler 5 by a high exhaust steam pipe 8.
The regenerative feedwater heating system is the same as that of the prior thermodynamic system, and is not described in detail here.
The invention takes a certain engineering requirement as an example: as shown in FIG. 2, the supercritical 350MW steam turbine has an industrial extraction pressure of 1.3MPa and a flow rate of 235 t/h. The conventional industrial steam extraction scheme is that a rotary clapboard is arranged in an intermediate pressure cylinder to adjust, the lowest load rate of a unit is 63 percent of rated load under the working condition of industrial steam extraction, and the lowest load rate of the unit is 23 percent of rated load under the working condition of industrial steam extraction by adopting the industrial steam extraction scheme of the coupling heat supply back press 1. Through the comparison of the economical efficiency and the lowest electric load of the two schemes, the heat consumption rate of the unit under the industrial steam extraction working condition is obviously reduced, the thermoelectric ratio is greatly improved, and the goal of deep thermoelectric decoupling is achieved.
The foregoing detailed description of the embodiments of the present application has been presented, and specific examples have been applied in the present application to explain the principles and implementations of the present application, and the above description of the embodiments is only used to help understand the method and the core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The utility model provides a degree of depth thermoelectric decoupling zero thermodynamic system of coupling heat supply back pressure machine which characterized in that: the system comprises a heat supply back pressing machine (1) with a heat supply back pressing machine bypass pipeline (12) arranged at a steam exhaust end, a high-pressure cylinder (2), a medium-low pressure cylinder (3), a generator (4), a main steam pipeline, a reheat steam pipeline and a boiler (5) which is respectively communicated with the main steam pipeline and the reheat steam pipeline;
the heat supply back pressure machine, the high pressure cylinder, the medium and low pressure cylinder and the generator are coaxially arranged and are sequentially connected;
the main steam pipeline is respectively connected with the heat supply back pressing machine (1) and the high-pressure cylinder (2);
the reheating steam pipeline is respectively connected with the heat supply back pressing machine (1) and the middle and low pressure cylinders (3);
and the heat supply back pressure machine bypass pipeline (12) is respectively connected with the main steam pipeline and the secondary main steam pipeline.
2. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 1, wherein: the main steam pipeline comprises a main steam pipeline (6) which is respectively communicated with a superheater (501) and a high-pressure cylinder of the boiler (5), and a bypass pipeline II (10) which is connected with the main steam pipeline (6) and the heat supply back pressure machine (1); and the steam exhaust end of the bypass pipeline II (10) is connected with a bypass pipeline (12) of the heat supply back pressure machine.
3. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 2, wherein: the reheating steam pipeline comprises a reheating steam pipeline (9) which is respectively communicated with a reheater (502) of the boiler (5) and the middle-low pressure cylinder, and a bypass pipeline IV (11) which is connected with the reheating steam pipeline (9) and the heat supply back pressure machine (1); the steam exhaust end of the bypass pipeline IV (11) is connected with a bypass pipeline (12) of the heat supply back pressure machine; the bypass pipeline IV (11) and the bypass pipeline II (10) are connected with the heat supply back pressing machine (1) through a connecting pipe (19).
4. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 3, wherein: and a main steam source switching valve (13) is arranged on the second bypass pipeline (10).
5. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 4, wherein: and a reheat steam source switching valve (14) is arranged on the bypass pipeline IV (11).
6. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 5, wherein: and a steam inlet regulating valve (20) is arranged on the connecting pipe (19).
7. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 1, wherein: the heat supply back pressing machine bypass pipeline (12) is provided with a heat supply bypass valve (15).
8. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 1, wherein: the main steam pipeline also comprises a first bypass pipeline (17) which is respectively connected with the main steam pipeline (6) and the high-pressure cylinder (2).
9. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 1, wherein: the reheating steam pipeline also comprises a bypass pipeline III (18) which is respectively connected with the reheating steam pipeline (9) and the medium-low pressure cylinder (3).
10. The deep thermoelectric decoupling thermal system of the coupled heat supply back pressure machine as claimed in claim 1, wherein: a steam exhaust end of the heat supply back press (1) is provided with a back press steam exhaust pipeline (16); the heat supply backpressure machine bypass pipeline (12) is connected with a backpressure machine steam exhaust pipeline (16).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114017149A (en) * | 2021-09-18 | 2022-02-08 | 华能国际电力江苏能源开发有限公司南通电厂 | Heat supply steam source matching system and method under deep peak regulation working condition |
| CN115898574A (en) * | 2022-10-25 | 2023-04-04 | 东方电气集团东方汽轮机有限公司 | Multi-parameter heat supply steam cascade utilization system |
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| CN103485848A (en) * | 2013-09-30 | 2014-01-01 | 中国电力工程顾问集团华东电力设计院 | Backpressure steam extraction small turbine thermal system which is coaxial with single reheating main turbine |
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| CN108104890A (en) * | 2017-12-15 | 2018-06-01 | 联合瑞升（北京）科技有限公司 | A kind of steam supply heating system of depth thermoelectricity decoupling |
| CN111734505A (en) * | 2020-05-27 | 2020-10-02 | 北京龙威发电技术有限公司 | Supercritical high-back-pressure steam turbine heat supply system and heat supply method |
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| CN114017149A (en) * | 2021-09-18 | 2022-02-08 | 华能国际电力江苏能源开发有限公司南通电厂 | Heat supply steam source matching system and method under deep peak regulation working condition |
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Application publication date: 20210810 |