CN114719236A - Method for adjusting steam pressure of power generation by ultrahigh temperature, ultrahigh pressure and dry quenching waste heat - Google Patents
Method for adjusting steam pressure of power generation by ultrahigh temperature, ultrahigh pressure and dry quenching waste heat Download PDFInfo
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- CN114719236A CN114719236A CN202210454756.8A CN202210454756A CN114719236A CN 114719236 A CN114719236 A CN 114719236A CN 202210454756 A CN202210454756 A CN 202210454756A CN 114719236 A CN114719236 A CN 114719236A
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- 238000010791 quenching Methods 0.000 title claims abstract description 45
- 230000000171 quenching effect Effects 0.000 title claims abstract description 45
- 239000002918 waste heat Substances 0.000 title claims abstract description 25
- 238000010248 power generation Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 70
- 230000003584 silencer Effects 0.000 claims abstract description 32
- 239000000571 coke Substances 0.000 claims abstract description 12
- 238000003303 reheating Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/04—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks
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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
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
- F22B37/44—Applications, arrangements, or dispositions of alarm or automatic safety devices of safety valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Control Of Turbines (AREA)
Abstract
The invention relates to the technical field of dry quenching waste heat boilers, in particular to a steam pressure adjusting method for power generation by ultrahigh temperature, ultrahigh pressure and dry quenching waste heat. 1) When the main steam is in overpressure, the main steam is adjusted by a main steam pressure-regulating and releasing pipeline bypass adjusting valve, and a small amount of steam is released to a silencer; if the main steam pressure continues to rise, opening a main path electric valve on the main steam pressure regulating and releasing pipeline to release a large amount of main steam to a silencer; 2) when the pressure of the reheat steam is over-pressure, a bypass regulating valve arranged on the high-temperature reheat steam pressure regulating and releasing pipeline is used for regulating and releasing a small amount of steam to a silencer; and if the pressure of the reheated steam continues to rise, opening a main circuit electric valve arranged on the high-temperature reheated steam pressure regulating and releasing pipeline, and releasing a large amount of reheated steam to the silencer. The pressure of the main steam and the reheat steam is kept stable, and then the stable and safe production of the coke dry quenching waste heat is ensured.
Description
Technical Field
The invention relates to the technical field of dry quenching waste heat boilers, in particular to a steam pressure adjusting method for ultrahigh-temperature, ultrahigh-pressure and dry quenching waste heat power generation.
Background
Since 1986, the Japanese coke dry quenching technology is introduced in Bao steel first-stage project, and by 2019, more than 300 coke dry quenching devices are put into operation in China, wherein the coking dry quenching rate of key steel enterprises is improved to 90% from less than 30% in 2005. The capacity of the dry quenching device is from 75t/h to 260t/h, the parameters of the dry quenching waste heat boiler mainly comprise medium temperature, medium pressure, high temperature, high pressure and high temperature and ultrahigh pressure at present, and the high-parameter dry quenching waste heat technology is more and more emphasized by the industry to the ultrahigh temperature, ultrahigh pressure and one-time intermediate reheating system developed at present.
The coke dry quenching thermodynamic system is an important component of the whole coke dry quenching process system and has the functions of reducing the temperature of the inert circulating gas of the coke dry quenching system and absorbing the heat of the inert circulating gas for effective utilization. The operation condition of the coke dry quenching thermodynamic system directly influences the operation of the coke dry quenching equipment.
The dry quenching load fluctuation is frequent, the overpressure operation of a boiler system is easily caused, and if the pressure of main steam and reheat steam is too high, the opening of a safety valve and even explosion are easily caused; not only affects production, but also affects the service life of boilers, turbines and various pipelines.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a steam pressure adjusting method for power generation by waste heat of ultra-high temperature, ultra-high pressure and dry quenching coke. The pressure of the main steam and the reheat steam is kept stable, and then the stable and safe production of the coke dry quenching waste heat is ensured.
In order to achieve the purpose, the invention adopts the following technical scheme:
the ultrahigh-temperature, ultrahigh-pressure and dry quenching waste heat power generation steam pressure regulating system comprises a high-temperature superheater of a dry quenching boiler, a high-pressure cylinder of a steam turbine generator unit, a low-temperature reheater, a high-temperature reheater, a low-pressure cylinder in the steam turbine generator unit and a silencer; the high-temperature superheater of the dry quenching boiler is connected with a high-pressure cylinder of the steam turbine generator unit through a main steam pipeline, the main steam pipeline is connected with a silencer through a main steam pressure regulating and releasing pipeline, a low-temperature reheater is connected with the high-pressure cylinder of the steam turbine generator unit through a low-temperature reheated steam pipeline, the high-temperature reheater is connected with a low-pressure cylinder in the steam turbine generator unit through a high-temperature reheated steam pipeline, and the silencer is connected with the high-temperature reheated steam pipeline through a high-temperature reheated steam pressure regulating and releasing pipeline.
And a main steam regulating valve is arranged on the main steam pipeline.
The main steam pressure regulating and diffusing pipeline is arranged behind the main steam regulating valve, one end of the main steam pressure regulating and diffusing pipeline is connected with the main steam pipeline behind the main steam regulating valve, and the other end of the main steam pressure regulating and diffusing pipeline is connected with the silencer.
And a bypass adjusting valve and a main path electric valve are arranged on the main steam pressure regulating and releasing pipeline.
And a bypass adjusting valve and a main path electric valve are arranged on the high-temperature reheating steam pressure regulating and releasing pipeline.
A steam pressure adjusting method for ultrahigh-temperature, ultrahigh-pressure and dry quenching waste heat power generation specifically comprises the following steps:
1) main steam pressure adjustment:
the main steam pressure is adjusted through a main steam adjusting valve on the main steam pipeline, and the adjustment is carried out according to the front steam pressure of the main steam adjusting valve, so that the main steam pressure is stabilized; when the load fluctuates sharply, the steam pressure is adjusted according to the steam pressure behind the main steam adjusting valve;
when the main steam is in overpressure, a bypass regulating valve arranged on a main steam pressure regulating and releasing pipeline is used for regulating, and a small amount of steam is released to a silencer;
if the main steam pressure continues to rise, opening a main circuit electric valve arranged on a main steam pressure regulating and releasing pipeline, releasing a large amount of main steam to a silencer, and ensuring that the main steam and the boiler operation pressure are maintained below the setting pressure of a safety valve;
2) reheat steam pressure regulation:
when the pressure of the reheat steam is over-pressure, a bypass regulating valve arranged on the high-temperature reheat steam pressure regulating and releasing pipeline is used for regulating and releasing a small amount of steam to the silencer;
if the reheat steam pressure continues to rise, a main circuit electric valve arranged on the high-temperature reheat steam pressure regulating and releasing pipeline is opened, a large amount of reheat steam is released to a silencer, and the operating pressure of the reheat steam is guaranteed to be maintained below the setting pressure of a safety valve.
Compared with the prior art, the invention has the beneficial effects that:
the main steam is regulated by a main steam regulating valve on a main steam pipeline and regulated according to the steam pressure in front of the main steam regulating valve, the main steam pressure is stabilized, when the load fluctuates sharply, a small amount of steam is regulated and diffused to a silencer by a bypass regulating valve arranged on a main steam pressure regulating and diffusing pipeline according to the steam pressure behind the main steam regulating valve on the main steam pipeline and the main steam is in overpressure, if the main steam pressure continues to rise, a main steam electric valve arranged on the main steam pressure regulating and diffusing pipeline is opened, a large amount of main steam is diffused to the silencer, and the main steam and the boiler operation pressure are guaranteed to be maintained below the setting pressure of a safety valve.
When the load is fluctuated severely and the pressure of the reheat steam is over-pressure, a small amount of steam is adjusted and diffused to the silencer through a bypass adjusting valve arranged on the high-temperature reheat steam pressure-regulating diffusion pipeline, if the pressure of the reheat steam is continuously increased, a main pipeline electric valve arranged on the high-temperature reheat steam pressure-regulating diffusion pipeline is opened, a large amount of reheat steam is diffused to the silencer, and the operating pressure of the reheat steam is guaranteed to be maintained below the setting pressure of the safety valve.
The invention solves the problem that the stable and safe production is influenced by the overpressure operation of a boiler system caused by frequent fluctuation of the dry quenching load.
Drawings
FIG. 1 is a schematic diagram of the structure and process flow of the present invention.
In the figure: 1-high-temperature superheater of dry quenching boiler 2-high-temperature cylinder 3 of steam turbine generator unit 4-high-temperature reheater 5-low-pressure cylinder 6 of steam turbine generator unit 7-main steam pipeline 8-low-temperature reheating steam pipeline 9-high-temperature reheating steam pipeline 10-high-temperature reheating steam pressure regulating and releasing pipeline 11-silencer 12-ultrahigh-temperature, ultrahigh-pressure and single-intermediate reheating dry quenching waste heat boiler 13-circulating gas inlet 14-circulating gas outlet
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1, the ultrahigh-temperature, ultrahigh-pressure and dry quenching waste heat power generation steam pressure adjusting system comprises a dry quenching boiler high-temperature superheater 1, a turbo generator unit high-pressure cylinder 2, a low-temperature reheater 3, a high-temperature reheater 4, a turbo generator unit medium-low pressure cylinder 5 and a silencer 11.
The high-temperature superheater 1, the low-temperature reheater 3 and the high-temperature reheater 4 of the dry quenching boiler are arranged in the ultrahigh-temperature, ultrahigh-pressure and primary intermediate reheating dry quenching waste heat boiler 12, and the ultrahigh-temperature, ultrahigh-pressure and primary intermediate reheating dry quenching waste heat boiler 12 is provided with a circulating gas inlet 13 and a circulating gas outlet 14.
The high-temperature superheater 1 of the dry quenching boiler is connected with a high-pressure cylinder 2 of the steam turbine generator unit through a main steam pipeline 6, and a main steam regulating valve is arranged on the main steam pipeline 6. The main steam pipeline 6 is connected with the silencer 11 through a main steam pressure regulating and releasing pipeline 7, one end of the main steam pressure regulating and releasing pipeline 7 is connected with the main steam pipeline 6 behind the main steam regulating valve, and the other end of the main steam pressure regulating and releasing pipeline is connected with the silencer 11. The main steam pressure regulating and releasing pipeline 7 is provided with a bypass regulating valve and a main circuit electric valve.
The low-temperature reheater 3 is connected with the high-pressure cylinder 2 of the steam turbine generator unit through a low-temperature reheating steam pipeline 8, the high-temperature reheater 4 is connected with the low-pressure cylinder 5 of the steam turbine generator unit through a high-temperature reheating steam pipeline 9, and the silencer 11 is connected with the high-temperature reheating steam pipeline 9 through a high-temperature reheating steam pressure regulating and releasing pipeline 10. A bypass adjusting valve and a main circuit electric valve are arranged on the high-temperature reheating steam pressure regulating and releasing pipeline 10.
A steam pressure adjusting method for ultrahigh-temperature, ultrahigh-pressure and dry quenching waste heat power generation specifically comprises the following steps:
1) main steam pressure regulation:
the main steam pressure is adjusted through a main steam adjusting valve on the main steam pipeline 6, and the main steam pressure is adjusted according to the front steam pressure of the main steam adjusting valve, so that the main steam pressure is stabilized; when the load fluctuates sharply, the steam pressure is adjusted according to the steam pressure behind the main steam adjusting valve;
when the main steam is in overpressure, a bypass adjusting valve arranged on a main steam pressure regulating and releasing pipeline 7 is used for adjusting and releasing a small amount of steam to a silencer;
if the main steam pressure continues to rise, a main circuit electric valve arranged on the main steam pressure regulating and releasing pipeline 7 is opened, a large amount of main steam is released to the silencer 11, and the main steam and the boiler operation pressure are guaranteed to be maintained below the safety valve setting pressure;
2) reheat steam pressure regulation:
when the pressure of the reheat steam is over-pressure, a small amount of steam is adjusted and diffused to a silencer 11 through a bypass adjusting valve arranged on a high-temperature reheat steam pressure-adjusting diffusing pipeline 10;
if the reheat steam pressure continues to rise, the main circuit electric valve arranged on the high-temperature reheat steam pressure regulating and releasing pipeline 10 is opened, a large amount of reheat steam is released to the silencer 11, and the operating pressure of the reheat steam is guaranteed to be maintained below the setting pressure of the safety valve.
The invention solves the problem that stable and safe production is influenced due to overpressure operation of a boiler system caused by frequent fluctuation of dry quenching load. The invention can automatically adjust the pressure of the main steam and the reheat steam, keep the pressure of the main steam and the reheat steam stable, and further ensure the stable and safe production of the coke dry quenching waste heat.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The steam pressure adjusting system for ultra-high temperature, ultra-high pressure and dry quenching waste heat power generation is characterized by comprising a high-temperature superheater of a dry quenching boiler, a high-pressure cylinder of a steam turbine generator unit, a low-temperature reheater, a high-temperature reheater, a low-pressure cylinder of the steam turbine generator unit and a silencer; the high-temperature superheater of the coke dry quenching boiler is connected with a high-pressure cylinder of the steam turbine generator unit through a main steam pipeline, the main steam pipeline is connected with a silencer through a main steam pressure regulating and releasing pipeline, a low-temperature reheater is connected with the high-pressure cylinder of the steam turbine generator unit through a low-temperature reheating steam pipeline, the high-temperature reheater is connected with a low-pressure cylinder in the steam turbine generator unit through a high-temperature reheating steam pipeline, and the silencer is connected with the high-temperature reheating steam pipeline through a high-temperature reheating steam pressure regulating and releasing pipeline.
2. The ultrahigh-temperature, ultrahigh-pressure and dry quenching waste heat power generation steam pressure regulating system as claimed in claim 1, wherein a main steam regulating valve is arranged on the main steam pipeline.
3. The system for regulating the steam pressure for the ultra-high temperature, ultra-high pressure and dry quenching waste heat power generation according to claim 2, wherein the main steam pressure regulating and releasing pipeline is arranged behind the main steam regulating valve, one end of the main steam pressure regulating and releasing pipeline is connected with the main steam pipeline behind the main steam regulating valve, and the other end of the main steam pressure regulating and releasing pipeline is connected with the silencer.
4. The ultrahigh-temperature, ultrahigh-pressure and dry quenching waste heat power generation steam pressure regulating system as claimed in claim 1, wherein a bypass regulating valve and a main circuit electric valve are arranged on the main steam pressure regulating and releasing pipeline.
5. The ultrahigh-temperature, ultrahigh-pressure and dry quenching waste heat power generation steam pressure regulating system as claimed in claim 1, wherein a bypass regulating valve and a main circuit electric valve are arranged on the high-temperature reheat steam pressure regulating and releasing pipeline.
6. The method for adjusting the steam pressure for the ultra-high temperature, ultra-high pressure and dry quenching waste heat power generation system based on any one of claims 1 to 5 is characterized by comprising the following steps:
1) main steam pressure regulation:
the main steam pressure is adjusted through a main steam adjusting valve on the main steam pipeline, and the adjustment is carried out according to the front steam pressure of the main steam adjusting valve, so that the main steam pressure is stabilized; when the load fluctuates sharply, the steam pressure is adjusted according to the steam pressure behind the main steam adjusting valve;
when the main steam is in overpressure, a bypass regulating valve arranged on a main steam pressure regulating and releasing pipeline is used for regulating, and a small amount of steam is released to a silencer;
if the main steam pressure continues to rise, opening a main circuit electric valve arranged on a main steam pressure regulating and releasing pipeline, releasing a large amount of main steam to a silencer, and ensuring that the main steam and the boiler operation pressure are maintained below the setting pressure of a safety valve;
2) reheat steam pressure regulation:
when the pressure of the reheat steam is over-pressure, a bypass regulating valve arranged on the high-temperature reheat steam pressure regulating and releasing pipeline is used for regulating and releasing a small amount of steam to a silencer;
if the reheat steam pressure continues to rise, a main circuit electric valve arranged on the high-temperature reheat steam pressure regulating and releasing pipeline is opened, a large amount of reheat steam is released to a silencer, and the operating pressure of the reheat steam is guaranteed to be maintained below the setting pressure of a safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210454756.8A CN114719236A (en) | 2022-04-28 | 2022-04-28 | Method for adjusting steam pressure of power generation by ultrahigh temperature, ultrahigh pressure and dry quenching waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210454756.8A CN114719236A (en) | 2022-04-28 | 2022-04-28 | Method for adjusting steam pressure of power generation by ultrahigh temperature, ultrahigh pressure and dry quenching waste heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114719236A true CN114719236A (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210454756.8A Withdrawn CN114719236A (en) | 2022-04-28 | 2022-04-28 | Method for adjusting steam pressure of power generation by ultrahigh temperature, ultrahigh pressure and dry quenching waste heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114719236A (en) |
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2022
- 2022-04-28 CN CN202210454756.8A patent/CN114719236A/en not_active Withdrawn
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Application publication date: 20220708 |