CN107152316B - Cascade utilization system of steam energy - Google Patents
Cascade utilization system of steam energy Download PDFInfo
- Publication number
- CN107152316B CN107152316B CN201710568862.8A CN201710568862A CN107152316B CN 107152316 B CN107152316 B CN 107152316B CN 201710568862 A CN201710568862 A CN 201710568862A CN 107152316 B CN107152316 B CN 107152316B
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- Prior art keywords
- steam
- turbine
- steam inlet
- branch
- small turbine
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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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
- F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The cascade utilization system of the steam energy comprises a small turbine, a steam inlet pipeline, a steam exhaust pipeline and a generator, wherein the steam inlet pipeline is connected with the steam inlet end of the small turbine, the steam exhaust pipeline is connected with the air exhaust end of the small turbine, and the generator is connected with the small turbine; the steam inlet pipeline is connected with the large-sized steam turbine; the exhaust pipeline comprises a heating branch and a desuperheater Wen Zhilu which are connected in parallel, a hot primary air heating device is arranged on the heating branch, and a desuperheater is arranged on the desuperheater branch. The invention uses the form of dragging the generator by the small turbine to firstly generate electricity and then supply heat to the steam extracted by the existing large-sized unit (large turbine), thereby achieving the purposes of energy saving and consumption reduction and having high steam utilization rate; the system is flexible to operate, high-efficiency cascade utilization of steam energy is realized, net power on-line electric quantity of a power plant is improved, and economic benefit, social benefit and environmental benefit of enterprises are improved.
Description
Technical Field
The invention relates to the field of thermal power plant design, in particular to a cascade utilization system of steam energy.
Background
With the increasing demand of energy and heat for various enterprises and society, the adoption of central heating realizes the efficient cascade utilization of energy and the effective energy-saving management, which becomes the urgent demands of the state and the thermal power plant.
In the prior art, according to the heating parameter requirement, the heating mode of the thermal power plant directly reduces the temperature and pressure of higher parameter steam extracted by the existing large-sized unit (large-sized steam turbine), then supplies heat to the outside, and the heat supply can cause serious loss of energy after reducing the temperature and the pressure, so that the condition of high-quality low-usage of steam is commonly existed, the steam utilization rate is low, and the energy waste is serious.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the background technology and provide a cascade utilization system of steam energy with high steam utilization rate.
The technical scheme adopted by the invention for solving the technical problems is that the cascade utilization system of steam energy comprises a small turbine, a steam inlet pipeline, a steam exhaust pipeline and a generator, wherein the steam inlet pipeline is connected with a steam inlet end of the small turbine, the steam exhaust pipeline is connected with an exhaust end of the small turbine, and the generator is connected with the small turbine; the steam inlet pipeline is connected with the large steam turbine; the exhaust pipeline comprises a heating branch and a desuperheater Wen Zhilu which are connected in parallel, a hot primary air heating device is arranged on the heating branch, and a desuperheater is arranged on the desuperheater branch.
Further, the small turbine is a back pressure turbine.
Further, the steam inlet pipeline comprises two steam inlet branches connected in parallel, and each steam inlet branch is sequentially provided with a pneumatic check valve, a first electric gate valve, a first pneumatic regulating valve, a second electric gate valve and a first manual gate valve.
Further, the large steam turbine is connected with one or two steam inlet branches.
Further, a third electric gate valve, a second pneumatic regulating valve and a fourth electric gate valve are sequentially arranged on the heating branch of the steam exhaust pipeline; and a fifth electric gate valve is further arranged on the temperature reduction branch.
Compared with the prior art, the invention has the following advantages: the steam extracted by the existing large-sized unit (large-sized turbine) is firstly generated and then supplied with heat in a mode of dragging the generator by the small-sized turbine, so that the purposes of saving energy and reducing consumption are achieved, and the steam utilization rate is high. The system of the invention is flexible to operate, realizes high-efficiency cascade utilization of steam energy, improves net power supply of the power plant, and improves economic benefit, social benefit and environmental protection benefit of enterprises.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention.
In the figure: 1-steam inlet pipeline, 2-small turbine, 3-steam exhaust pipeline, 4-hot primary air heating device, 5-desuperheater and 6-generator.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and specific examples.
Referring to fig. 1, the embodiment comprises a small turbine 2, a steam inlet pipeline 1, a steam exhaust pipeline 3 and a generator 6, wherein the steam inlet pipeline 1 is connected with a steam inlet end of the small turbine 2, the steam exhaust pipeline 3 is connected with a steam exhaust end of the small turbine 2, and the generator 6 is connected with the small turbine 2; the steam inlet pipeline 1 is connected with a large steam turbine (not shown in the figure); the small turbine 2 is a back pressure turbine; the steam inlet pipeline 1 comprises two steam inlet branches connected in parallel, each steam inlet branch is sequentially provided with a pneumatic check valve, a first electric gate valve, a first pneumatic regulating valve, a second electric gate valve and a first manual gate valve, the large steam turbine is connected with one steam inlet branch or two steam inlet branches, and the steam extraction of the large steam turbine can switch and supply steam to the small steam turbine 2 and can also supply steam to the small steam turbine 2 at the same time; the steam exhaust pipeline 3 comprises a heating branch and a desuperheater Wen Zhilu which are connected in parallel, a hot primary air heating device 4 is arranged on the heating branch, a desuperheater 5 is arranged on the temperature reducing branch, and a third electric gate valve, a second pneumatic regulating valve and a fourth electric gate valve are also arranged on the heating branch in sequence; and a fifth electric gate valve is also arranged on the temperature reduction branch.
The working principle of the invention is as follows:
the extracted steam of the large turbine enters the small turbine 2 through the steam inlet pipeline 1, the small turbine 2 converts steam heat energy into mechanical energy for the generator 6 to generate electricity, and the electricity generated by the generator 6 is supplied to the plant power of the large turbine; the temperature of the steam after the small turbine 2 works is reduced, the steam is discharged through the steam discharge pipeline 3, the steam can pass through the heating branch or the temperature reduction branch or both branches, and when passing through the heating branch, the steam provides heat for the hot primary air heating device 4 and heats the hot primary air, so that the steam is heated to the outside after the temperature of the steam is further reduced; when Wen Zhilu is reduced, the steam is cooled by the desuperheater 5 and then is supplied with heat, and the temperature of the steam cooled by the desuperheater 5 on the temperature reducing branch is the same as the temperature of the steam heated by the primary air heating device 4 on the heating branch.
The two steam inlet branches of the steam inlet pipeline 1 can supply steam to the small turbine 2 at the same time, and the steam inlet requirement of the back pressure turbine can be met in a mode that one steam inlet branch supplies steam independently. After the back pressure turbine generates power by acting, the exhaust steam of the back pressure turbine heats the hot primary air and is then used for supplying heat to the outside. When the hot primary air does not need to be heated, the exhaust steam of the back pressure turbine can be subjected to Wen Zhilu reduction, proper temperature and pressure reduction and then external heat supply.
The invention uses the back pressure turbine to drag the generator to generate electricity and then supply heat to the steam extracted by the existing large-scale unit (large-scale turbine), thereby achieving the purposes of energy saving and consumption reduction and having high steam utilization rate. The system of the invention is flexible to operate, realizes high-efficiency cascade utilization of steam energy, improves net power supply of the power plant, and improves economic benefit, social benefit and environmental protection benefit of enterprises.
Various modifications and variations of the present invention may be made by those skilled in the art, and, provided that they are within the scope of the appended claims and their equivalents, they are also within the scope of the present invention.
What is not described in detail in the specification is prior art known to those skilled in the art.
Claims (1)
1. A cascade utilization system of steam energy, characterized in that: the system comprises a small turbine, a steam inlet pipeline, a steam exhaust pipeline and a generator, wherein the steam inlet pipeline is connected with a steam inlet end of the small turbine; the exhaust pipeline is connected with the exhaust end of the small turbine; the generator is connected with the small turbine; the steam inlet pipeline is connected with the large steam turbine; the steam exhaust pipeline comprises a heating branch and a temperature reducer Wen Zhilu which are connected in parallel, a hot primary air heating device is arranged on the heating branch, and a temperature reducer is arranged on the temperature reducer branch; the small turbine adopts a back pressure turbine; the steam inlet pipeline comprises two steam inlet branches connected in parallel, and each steam inlet branch is sequentially provided with a pneumatic check valve, a first electric gate valve, a first pneumatic regulating valve, a second electric gate valve and a first manual gate valve; the large steam turbine is connected with one steam inlet branch or two steam inlet branches; a third electric gate valve, a second pneumatic regulating valve and a fourth electric gate valve are sequentially arranged on the heating branch of the steam exhaust pipeline; and a fifth electric gate valve is further arranged on the temperature reduction branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710568862.8A CN107152316B (en) | 2017-07-13 | 2017-07-13 | Cascade utilization system of steam energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710568862.8A CN107152316B (en) | 2017-07-13 | 2017-07-13 | Cascade utilization system of steam energy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107152316A CN107152316A (en) | 2017-09-12 |
| CN107152316B true CN107152316B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710568862.8A Active CN107152316B (en) | 2017-07-13 | 2017-07-13 | Cascade utilization system of steam energy |
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| Country | Link |
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| CN (1) | CN107152316B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108223028A (en) * | 2018-02-11 | 2018-06-29 | 华电郑州机械设计研究院有限公司 | A kind of filling formula back pressure turbine heating system |
| CN108960569A (en) * | 2018-06-01 | 2018-12-07 | 华北电力科学研究院有限责任公司 | Thermal power plant extraction for heat supply method, apparatus, equipment and storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619662A (en) * | 2009-08-14 | 2010-01-06 | 清华大学 | Method for recovering waste heat of thermal power plant and heating and supplying heat to hot water in a stepping way |
| CN202675925U (en) * | 2012-07-19 | 2013-01-16 | 中国电力工程顾问集团华东电力设计院 | Drive turbine steam exhaust cooling system and thermal power generating unit of thermal power plant |
| CN203796339U (en) * | 2013-11-18 | 2014-08-27 | 舒少辛 | Waste heat recovery device of direct air cooling unit |
| CN204113364U (en) * | 2014-05-29 | 2015-01-21 | 西安交通大学 | The waste heat recovering device of lack of water cold area Direct Air-cooled Unit |
| CN204476486U (en) * | 2015-02-28 | 2015-07-15 | 国电龙源节能技术有限公司 | Steam classified utilization device |
| CN104948240A (en) * | 2015-06-01 | 2015-09-30 | 宋子琛 | Exhaust steam waste heat recycling system for small steam turbine of induced draft fan through circulating water based on steam turbine driving |
| CN207004580U (en) * | 2017-07-13 | 2018-02-13 | 中国能源建设集团湖南省电力设计院有限公司 | The gradient utilization system of steam energy |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6701712B2 (en) * | 2000-05-24 | 2004-03-09 | Ormat Industries Ltd. | Method of and apparatus for producing power |
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2017
- 2017-07-13 CN CN201710568862.8A patent/CN107152316B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619662A (en) * | 2009-08-14 | 2010-01-06 | 清华大学 | Method for recovering waste heat of thermal power plant and heating and supplying heat to hot water in a stepping way |
| CN202675925U (en) * | 2012-07-19 | 2013-01-16 | 中国电力工程顾问集团华东电力设计院 | Drive turbine steam exhaust cooling system and thermal power generating unit of thermal power plant |
| CN203796339U (en) * | 2013-11-18 | 2014-08-27 | 舒少辛 | Waste heat recovery device of direct air cooling unit |
| CN204113364U (en) * | 2014-05-29 | 2015-01-21 | 西安交通大学 | The waste heat recovering device of lack of water cold area Direct Air-cooled Unit |
| CN204476486U (en) * | 2015-02-28 | 2015-07-15 | 国电龙源节能技术有限公司 | Steam classified utilization device |
| CN104948240A (en) * | 2015-06-01 | 2015-09-30 | 宋子琛 | Exhaust steam waste heat recycling system for small steam turbine of induced draft fan through circulating water based on steam turbine driving |
| CN207004580U (en) * | 2017-07-13 | 2018-02-13 | 中国能源建设集团湖南省电力设计院有限公司 | The gradient utilization system of steam energy |
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| CN107152316A (en) | 2017-09-12 |
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