CN111894683A - Steam turbine unit air pre-warming quick start control system and method - Google Patents
Steam turbine unit air pre-warming quick start control system and method Download PDFInfo
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- CN111894683A CN111894683A CN202010749388.0A CN202010749388A CN111894683A CN 111894683 A CN111894683 A CN 111894683A CN 202010749388 A CN202010749388 A CN 202010749388A CN 111894683 A CN111894683 A CN 111894683A
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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
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
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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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
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Abstract
The invention relates to a steam turbine set air pre-warming quick start control system and a method, and the system comprises a steam turbine high-pressure cylinder, a steam turbine intermediate-pressure cylinder, a high-pressure main steam valve, a high-pressure regulating valve, a high-pressure cylinder steam exhaust check valve, a high-pressure cylinder steam exhaust ventilation valve, an intermediate-pressure main steam valve, an intermediate-pressure regulating valve, a high-pressure main steam valve rear drain valve, an intermediate-pressure main steam valve rear drain valve, a high-pressure cylinder warm cylinder air inlet regulating valve, an intermediate-pressure cylinder warm cylinder air inlet regulating valve, an air pre-warming device, a steam turbine low-pressure cylinder, a condenser, a vacuum breaking valve, a compressed air inlet steam temperature measuring device, a high-pressure cylinder temperature measuring device, an intermediate-pressure cylinder temperature measuring. The invention can change the cold-state starting of the steam turbine into the warm-state starting, shorten the starting time, achieve the purpose of quickly starting the steam turbine, save the consumption of fuel and the starting cost, and realize energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of thermal power generation, in particular to a steam turbine set air pre-warming quick start control system and method.
Background
Under the great trend of energy conservation and emission reduction, novel energy power generation such as photovoltaic power generation and wind power generation is continuously and rapidly developed, the power generation proportion is also increased day by day, and as the novel energy power generation does not have the peak regulation performance and the primary frequency modulation capability of a power grid, the peak regulation performance and the primary frequency modulation function of a traditional thermal power generation unit are more and more prominent, so that the stability function of the thermal power generation unit in the power grid is more and more prominent, and the starting is more and more frequent.
The traditional thermal power generating set is limited by design and manufacturing structures and process materials, and the heating rate of a steam turbine set body is required, the actual cold-state starting time of the set is about 10-16 hours from the ignition of a boiler to the full load of the set, so that the huge waste of starting fuel is caused, and the stable operation of a power grid is influenced.
Disclosure of Invention
The invention aims to provide a steam turbine unit air pre-warming quick start control system and method, before the unit is started in a cold state, compressed air is heated to a temperature matched with a cylinder body through an air pre-warming device and a temperature matching controller thereof to heat the cylinder body, and the cylinder body temperature is pre-warmed to a desired target through adjusting the matching temperature difference between the cylinder body and the heated air and controlling the air flow, so that the cold start of a steam turbine is converted into the warm start, the start time is shortened, the purpose of quickly starting the steam turbine is achieved, the consumption of fuel and the start cost are saved, and the energy conservation and emission reduction are realized.
The invention provides an air pre-warming quick start control system of a steam turbine unit, which comprises a steam turbine high-pressure cylinder, a steam turbine intermediate-pressure cylinder, a high-pressure main steam valve, a high-pressure regulating valve, a high-pressure cylinder steam exhaust check valve, a high-pressure cylinder steam exhaust ventilation valve, an intermediate-pressure main steam valve, an intermediate-pressure regulating valve, a high-pressure main steam valve rear drain valve, an intermediate-pressure main steam valve rear drain valve, a high-pressure cylinder warming cylinder air inlet regulating valve, an intermediate-pressure cylinder warming cylinder air inlet regulating valve, an air pre-warming device, a steam turbine low-pressure cylinder, a condenser, a vacuum breaking valve, a compressed air inlet temperature measuring device, a high-pressure cylinder temperature measuring device, an intermediate-pressure cylinder temperature measuring device;
the high-pressure cylinder of the steam turbine is sequentially connected with the high-pressure regulating valve and the high-pressure main steam valve through a main steam pipeline and is connected with the high-pressure cylinder steam exhaust check valve and the high-pressure cylinder steam exhaust ventilation valve through a high-pressure steam exhaust pipeline; the steam turbine intermediate pressure cylinder is sequentially connected with the intermediate pressure regulating valve and the intermediate pressure main steam valve through a reheat steam pipeline; the steam turbine intermediate pressure cylinder is connected with the steam turbine low pressure cylinder through a steam guide pipeline, the steam turbine low pressure cylinder is connected with the condenser, and the condenser is connected with the vacuum breaker valve;
the air pre-heating device is connected with the high-pressure cylinder warm cylinder steam inlet regulating valve through an air conveying pipeline, and the high-pressure cylinder warm cylinder steam inlet regulating valve is connected with the high-pressure main steam valve and the high-pressure regulating valve through a high-pressure cylinder drain pipeline; the rear drain valve of the high-pressure main steam valve is connected with a rear drain pipeline of the high-pressure main steam valve;
the air pre-heating device is connected with the air inlet regulating valve of the medium-pressure cylinder warm cylinder through an air conveying pipeline, and the steam inlet regulating valve of the medium-pressure cylinder warm cylinder is connected with the medium-pressure main steam valve and the medium-pressure regulating valve through a medium-pressure cylinder drain pipeline; the middle-pressure main steam valve rear drain valve is connected with the middle-pressure main steam valve rear drain pipeline;
the air delivery pipeline of the air pre-heating device is provided with a compressed air inlet temperature measuring device, the high-pressure cylinder of the steam turbine is provided with a high-pressure cylinder temperature measuring device, and the medium-pressure cylinder of the steam turbine is provided with a medium-pressure cylinder temperature measuring device;
and the temperature matching controller is connected with the compressed air inlet temperature measuring device, the high-pressure cylinder temperature measuring device and the intermediate pressure cylinder temperature measuring device through signal control cables.
Further, the high-pressure cylinder of the steam turbine is connected with the condenser through the high-pressure cylinder exhaust ventilation valve and used for sending exhaust of the high-pressure cylinder of the steam turbine into the condenser.
Further, the air pre-warming device adopts a heating device with air as a medium.
Further, the temperature measured by the high-pressure cylinder temperature measuring device comprises the upper part temperature, the lower part temperature, the inner cylinder temperature, the outer cylinder temperature of the high-pressure cylinder body, the inlet temperature and the outlet temperature of the cylinder body, and the inner wall temperature and the outer wall temperature of the cylinder body;
the temperature measured by the intermediate pressure cylinder temperature measuring device comprises the upper part temperature, the lower part temperature, the inner cylinder temperature and the outer cylinder temperature of the intermediate pressure cylinder body, the inlet temperature and the outlet temperature of the cylinder body, and the inner wall temperature and the outer wall temperature of the cylinder body.
The invention also provides an air pre-warming quick start control method of the system, which comprises the following steps:
when the steam turbine generator unit is started, before the boiler is ignited, the air pre-heating device is started to heat the steam turbine high-pressure cylinder and the steam turbine medium-pressure cylinder; when the high-pressure cylinder of the steam turbine is pre-warmed, the high-pressure cylinder warming air inlet regulating valve, the high-pressure regulating valve and the high-pressure cylinder steam exhaust ventilating valve are opened, and the high-pressure main steam valve, the high-pressure cylinder steam exhaust check valve and the high-pressure main steam valve rear drain valve are closed, so that hot air entering the high-pressure cylinder of the steam turbine heats the high-pressure cylinder, then enters the condenser through the high-pressure cylinder steam exhaust ventilating valve, and is exhausted to the atmosphere through the vacuum damage valve of the condenser; when the intermediate pressure cylinder of the steam turbine is pre-warmed, the air inlet regulating valve and the intermediate pressure regulating valve of the intermediate pressure cylinder are opened, and the intermediate pressure main steam valve and the rear drain valve of the intermediate pressure main steam valve are closed, so that hot air entering the intermediate pressure cylinder of the steam turbine heats the intermediate pressure cylinder, then enters the low pressure cylinder and the condenser of the steam turbine through the intermediate pressure steam exhaust pipeline, and is exhausted into the atmosphere through the vacuum destruction valve of the condenser.
After the air pre-warming quick start control system of the steam turbine set is started, the state of the cylinder body is judged through the temperature matching controller, the temperature rise rate of the cylinder body and the upper and lower temperature difference of the cylinder body are comprehensively judged according to the set temperature difference between the cylinder body and the outlet of the air pre-warming device and the set temperature target, and the inlet air quantity is adjusted through the cylinder body air inlet adjusting valve until the temperature of the cylinder body of the high-pressure cylinder and the middle-pressure cylinder of the steam turbine reaches the temperature start condition. After the cylinder body is pre-warmed by air, stopping the air pre-warming device, closing the high-pressure regulating valve, the high-pressure cylinder warming cylinder air inlet regulating valve, the medium-pressure regulating valve and the medium-pressure cylinder warming cylinder air inlet regulating valve, and enabling the unit to enter a normal temperature state starting program;
when the temperature rising rates of the cylinder bodies of the high-pressure cylinder and the medium-pressure cylinder of the steam turbine are different, the air quantity entering the high-pressure cylinder and the medium-pressure cylinder of the steam turbine is controlled through the opening degrees of the high-pressure cylinder warming air inlet regulating valve and the medium-pressure cylinder warming air inlet regulating valve respectively, and the temperature rising rates and the final cylinder body temperatures of the high-pressure cylinder and the medium-pressure cylinder of the steam turbine are controlled.
By means of the scheme, the system and the method for quickly starting the steam turbine set through air pre-warming are characterized in that before the steam turbine set is started, compressed air is heated to the temperature matched with a cylinder body through the air pre-warming device and the temperature matching controller of the air pre-warming device, the compressed air is respectively introduced into a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder of the steam turbine, the temperature of the cylinder body is pre-warmed to an expected target through logic control of the controller and control of the air flow and the matching temperature difference of the cylinder body and the heated air, and therefore cold-state starting of the steam turbine is converted into warm-state starting, starting time of the steam turbine set is shortened by nearly half, starting efficiency of the steam turbine set is improved, meanwhile, the problems of unsmooth expansion of the high-pressure cylinder and the medium.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of a steam turbine set air pre-warming quick start control system of the present invention.
Fig. 2 is a flow chart of the method for controlling the air pre-warming quick start of the steam turbine set according to the present invention.
Reference numbers in the figures:
1-a turbine high-pressure cylinder, 2-a turbine intermediate-pressure cylinder, 3-a high-pressure main steam valve, 4-a high-pressure regulating valve, 5-a high-pressure cylinder steam-discharging check valve, 6-a high-pressure cylinder steam-discharging ventilation valve, 7-a medium-pressure main steam valve, 8-a medium-pressure regulating valve, 9-a high-pressure main steam valve rear drain valve, 10-a medium-pressure main steam valve rear drain valve, 11-a high-pressure cylinder warming cylinder air-inlet regulating valve, 12-a medium-pressure cylinder warming cylinder air-inlet regulating valve, 13-an air pre-warming device, 14-a turbine low-pressure cylinder, 15-a condenser, 16-a vacuum breaker, 17-a compressed air inlet temperature measuring device, 18-a high-pressure cylinder temperature measuring device, 19-an intermediate-pressure cylinder temperature measuring device and 20.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the present embodiment provides a steam turbine set air pre-warming fast start control system, including a steam turbine high pressure cylinder 1, a steam turbine medium pressure cylinder 2, a high pressure main steam valve 3, a high pressure regulating valve 4, a high pressure cylinder steam exhaust check valve 5, a high pressure cylinder steam exhaust ventilation valve 6, a medium pressure main steam valve 7, a medium pressure regulating valve 8, a high pressure main steam valve rear drain valve 9, a medium pressure main steam valve rear drain valve 10, a high pressure cylinder warm cylinder air intake regulating valve 11, a medium pressure cylinder warm cylinder air intake regulating valve 12, an air pre-warming device 13, a steam turbine low pressure cylinder 14, a condenser 15, a vacuum breaker valve 16, a compressed air intake temperature measuring device 17, a high pressure cylinder temperature measuring device 18, a medium pressure cylinder temperature measuring device 19, and a temperature matching controller 20;
the high-pressure steam turbine cylinder 1 is sequentially connected with a high-pressure regulating valve 4 and a high-pressure main steam valve 3 through a main steam pipeline and is connected with a high-pressure cylinder steam exhaust check valve 5 and a high-pressure cylinder steam exhaust ventilation valve 6 through a high-pressure steam exhaust pipeline; the steam turbine intermediate pressure cylinder 2 is sequentially connected with an intermediate pressure regulating valve 8 and an intermediate pressure main steam valve 7 through a reheating steam pipeline; the turbine intermediate pressure cylinder 2 is connected with a turbine low pressure cylinder 14 through a steam guide pipeline, the turbine low pressure cylinder 14 is connected with a condenser 15, and the condenser 15 is connected with a vacuum breaker valve 16;
the air pre-heating device 13 is connected with the high-pressure cylinder warming cylinder air inlet regulating valve 11 through an air conveying pipeline, and the high-pressure cylinder warming cylinder air inlet regulating valve 11 is connected with the high-pressure main steam valve 3 and the high-pressure regulating valve 4 through a high-pressure main steam valve body drain pipeline; the high-pressure main steam valve rear drain valve 9 is connected with a high-pressure main steam valve rear drain pipeline; the air pre-heating device 13 enters the access position of the steam turbine high-pressure cylinder 1 through an air conveying pipeline, not only is the drain pipeline of the high-pressure main steam valve 3 and the high-pressure regulating valve 4, but also comprises all drain access positions connected with the steam turbine high-pressure cylinder, and if the pipeline of the high-pressure regulating valve 4 connected with the steam turbine high-pressure cylinder 1 is drained, the body of the steam turbine high-pressure cylinder 1 is drained, and the like.
The air pre-heating device 13 is connected with the medium-pressure cylinder-warming air inlet regulating valve 12 through an air conveying pipeline, and the medium-pressure cylinder-warming air inlet regulating valve 12 is connected with the medium-pressure main steam valve 7 and the medium-pressure regulating valve 8 through a medium-pressure main steam valve body rear drain pipeline; the middle-pressure main steam valve rear drain valve 10 is connected with a middle-pressure valve body rear drain pipeline; the air pre-warming device 13 enters the access position of the steam turbine intermediate pressure cylinder 2 through an air conveying pipeline, not only is the drain pipeline of the intermediate pressure main steam valve 7 and the intermediate pressure regulating valve 8, but also comprises all drain access positions connected with the steam turbine intermediate pressure cylinder, and the pipeline connected with the steam turbine intermediate pressure cylinder 2 of the intermediate pressure regulating valve 8 is drained, and the body of the steam turbine intermediate pressure cylinder 2 is drained.
The air conveying pipeline of the air pre-heating device 13 is provided with a compressed air inlet temperature measuring device 17, the steam turbine high-pressure cylinder 1 is provided with a high-pressure cylinder temperature measuring device 18, and the steam turbine intermediate-pressure cylinder 2 is provided with an intermediate-pressure cylinder temperature measuring device 19;
the temperature matching controller 20 is connected with the compressed air inlet temperature measuring device 17, the high pressure cylinder temperature measuring device 18 and the intermediate pressure cylinder temperature measuring device 19 through signal control cables.
In the present embodiment, the turbine high-pressure cylinder 1 is connected to the condenser 15 through the high-pressure cylinder exhaust vent valve 6, and is configured to send exhaust gas of the turbine high-pressure cylinder 1 to the condenser 15. The system also comprises pipelines and systems for discharging any high-pressure cylinder and condenser of the steam turbine, such as drainage of a high-pressure cylinder body, drainage of a pipeline in front of a high-pressure discharge check valve and the like.
In the present embodiment, the air pre-warming device 13 is any type of air heating device. The air source of the air pre-warming device 13 is not merely plant compressed air, including air from anywhere.
In the present embodiment, the temperatures measured by the high-pressure cylinder temperature measuring device 18 include the upper portion temperature, the lower portion temperature, the inner cylinder temperature, the outer cylinder temperature of the high-pressure cylinder block, the inlet temperature and the outlet temperature of the cylinder block, and the inner wall temperature and the outer wall temperature of the cylinder block;
the temperature measured by the intermediate pressure cylinder temperature measuring device 19 includes the upper portion temperature, the lower portion temperature, the inner cylinder temperature, the outer cylinder temperature of the intermediate pressure cylinder body, the inlet temperature and the outlet temperature of the cylinder body, and the inner wall temperature and the outer wall temperature of the cylinder body.
The condenser vacuum breaking device in the embodiment not only comprises a vacuum breaking valve, but also comprises any component and channel which can enable the inside of the condenser to be communicated with the outside, such as a low-pressure cylinder atmospheric safety valve, a condenser steam side manhole door and the like.
Referring to fig. 2, the air pre-warming quick start control method of the system comprises the following steps:
when the steam turbine generator unit is started, before the boiler is ignited, the air pre-heating device is started to heat the steam turbine high-pressure cylinder and the steam turbine medium-pressure cylinder; when the high-pressure cylinder of the steam turbine is pre-warmed, the high-pressure cylinder warming air inlet regulating valve, the high-pressure regulating valve and the high-pressure cylinder steam exhaust ventilating valve are opened, and the high-pressure main steam valve, the high-pressure cylinder steam exhaust check valve and the high-pressure main steam valve rear drain valve are closed, so that hot air entering the high-pressure cylinder of the steam turbine heats the high-pressure cylinder, then enters the condenser through the high-pressure cylinder steam exhaust ventilating valve, and is exhausted to the atmosphere through the vacuum damage valve of the condenser; when the steam turbine intermediate pressure cylinder is pre-warmed, the intermediate pressure cylinder warming air inlet regulating valve and the intermediate pressure regulating valve are opened, and the intermediate pressure main steam valve rear drain valve are closed, so that hot air entering the steam turbine intermediate pressure cylinder heats the intermediate pressure cylinder, then enters the steam turbine low pressure cylinder and the condenser through the intermediate pressure steam exhaust pipeline, and is exhausted into the atmosphere through the vacuum destruction valve of the condenser.
After the air pre-warming quick start control system of the steam turbine set is started, the state of a cylinder body is judged through a temperature matching controller, the temperature rise rate of the cylinder body and the upper and lower temperature difference of the cylinder body are comprehensively judged according to the set temperature difference (or the manually set temperature difference) between the cylinder body and an outlet of an air pre-warming device and a set temperature target, the air inlet quantity of the cylinder body is adjusted through a cylinder body air inlet adjusting valve until the temperature of a high-pressure cylinder body of a steam turbine and the temperature of a middle pressure cylinder body of the steam turbine reach a temperature state start condition (150 plus 200 ℃), and after the air pre-warming device is stopped, the high-pressure adjusting valve, the high-pressure cylinder warming air inlet adjusting valve, the middle pressure;
when the temperature rising rates of the cylinder bodies of the high-pressure cylinder and the medium-pressure cylinder of the steam turbine are different, the air quantity entering the high-pressure cylinder and the medium-pressure cylinder of the steam turbine is controlled through the opening degrees of the high-pressure cylinder warming air inlet regulating valve and the medium-pressure cylinder warming air inlet regulating valve respectively, and the temperature rising rates and the final cylinder body temperatures of the high-pressure cylinder and the medium-pressure cylinder of the steam turbine are controlled.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A steam turbine set air pre-warming quick start control system is characterized by comprising a steam turbine high-pressure cylinder (1), a steam turbine intermediate-pressure cylinder (2), a high-pressure main steam valve (3), a high-pressure regulating valve (4), a high-pressure cylinder steam exhaust check valve (5), a high-pressure cylinder steam exhaust ventilation valve (6), an intermediate-pressure main steam valve (7), an intermediate-pressure regulating valve (8), a high-pressure main steam valve rear drain valve (9), an intermediate-pressure main steam valve rear drain valve (10), a high-pressure cylinder warm cylinder air inlet regulating valve (11), an intermediate-pressure cylinder warm cylinder steam inlet regulating valve (12), an air pre-warming device (13), a steam turbine low-pressure cylinder (14), a condenser (15), a vacuum breaking valve (16), a compressed air inlet temperature measuring device (17), a high-pressure cylinder temperature measuring device (18), an intermediate-pressure cylinder temperature measuring device (19) and a temperature matching controller;
the high-pressure steam turbine cylinder (1) is sequentially connected with the high-pressure regulating valve (4) and the high-pressure main steam valve (3) through a main steam pipeline and is connected with the high-pressure cylinder steam exhaust check valve (5) and the high-pressure cylinder steam exhaust ventilation valve (6) through a high-pressure steam exhaust pipeline; the steam turbine intermediate pressure cylinder (2) is sequentially connected with the intermediate pressure regulating valve (8) and the intermediate pressure main steam valve (7) through a reheat steam pipeline; the steam turbine intermediate pressure cylinder (2) is connected with the steam turbine low pressure cylinder (14) through a steam guide pipeline, the steam turbine low pressure cylinder (14) is connected with the condenser (15), and the condenser (15) is connected with the vacuum breaker valve (16);
the air pre-heating device (13) is connected with the high-pressure cylinder warming cylinder air inlet regulating valve (11) through an air conveying pipeline, and the high-pressure cylinder warming cylinder air inlet regulating valve (11) is connected with the high-pressure main steam valve (3) and the high-pressure regulating valve (4) through a high-pressure cylinder drain pipeline; the rear drain valve (9) of the high-pressure main steam valve is connected with a rear drain pipeline of the high-pressure main steam valve;
the air pre-heating device (13) is connected with the medium-pressure cylinder warming steam inlet regulating valve (12) through an air conveying pipeline, and the medium-pressure cylinder warming steam inlet regulating valve (12) is connected with the medium-pressure main steam valve (7) and the medium-pressure regulating valve (8) through a medium-pressure cylinder drain pipeline; the middle-pressure main steam valve rear drain valve (10) is connected with the middle-pressure main steam valve rear drain pipeline;
the air conveying pipeline of the air pre-heating device (13) is provided with a compressed air inlet temperature measuring device (17), the steam turbine high-pressure cylinder (1) is provided with a high-pressure cylinder temperature measuring device (18), and the steam turbine medium-pressure cylinder (2) is provided with a medium-pressure cylinder temperature measuring device (19);
and the temperature matching controller (20) is connected with the compressed air inlet temperature measuring device (17), the high-pressure cylinder temperature measuring device (18) and the intermediate pressure cylinder temperature measuring device (19) through signal control cables.
2. The steam turbine unit air pre-warming quick start control system according to claim 1, wherein the high-pressure turbine cylinder (1) is connected with the condenser (15) through the high-pressure cylinder exhaust ventilation valve (6) and is used for sending exhaust gas of the high-pressure turbine cylinder (1) into the condenser (15).
3. Steam turbine unit air pre-warming quick start control system according to claim 1, characterized in that the air pre-warming device (13) employs a heating device of an air medium.
4. The steam turbine unit air pre-warming quick start-up control system according to claim 1, wherein the temperature measured by the high pressure cylinder temperature measuring device (18) includes a high pressure cylinder body upper portion temperature, a low portion temperature, an inner cylinder temperature, an outer cylinder temperature, an inlet temperature and an outlet temperature of a cylinder body, and an inner wall temperature and an outer wall temperature of the cylinder body;
the temperature measured by the intermediate pressure cylinder temperature measuring device (19) comprises the upper part temperature, the lower part temperature, the inner cylinder temperature, the outer cylinder temperature of the intermediate pressure cylinder body, the inlet temperature and the outlet temperature of the cylinder body, and the inner wall temperature and the outer wall temperature of the cylinder body.
5. An air pre-warming quick start control method of the system according to any one of claims 1 to 4, comprising:
when the steam turbine generator unit is started, before the boiler is ignited, the air pre-heating device is started to heat the steam turbine high-pressure cylinder and the steam turbine medium-pressure cylinder; when the high-pressure cylinder of the steam turbine is pre-warmed, the high-pressure cylinder warming air inlet regulating valve, the high-pressure regulating valve and the high-pressure cylinder steam exhaust ventilating valve are opened, and the high-pressure main steam valve, the high-pressure cylinder steam exhaust check valve and the high-pressure main steam valve rear drain valve are closed, so that hot air entering the high-pressure cylinder of the steam turbine heats the high-pressure cylinder, then enters the condenser through the high-pressure cylinder steam exhaust ventilating valve, and is exhausted to the atmosphere through the vacuum damage valve of the condenser; when the intermediate pressure cylinder of the steam turbine is pre-warmed, the air inlet regulating valve and the intermediate pressure regulating valve of the intermediate pressure cylinder are opened, and the intermediate pressure main steam valve and the rear drain valve of the intermediate pressure main steam valve are closed, so that hot air entering the intermediate pressure cylinder of the steam turbine heats the intermediate pressure cylinder, then enters the low pressure cylinder and the condenser of the steam turbine through the intermediate pressure steam exhaust pipeline, and is exhausted to the atmosphere through the vacuum damage valve of the condenser;
after the air pre-warming quick start control system of the steam turbine set is started, judging the state of a cylinder body through a temperature matching controller, comprehensively judging the temperature rise rate of the cylinder body and the upper and lower temperature difference of the cylinder body according to the set temperature difference between the cylinder body and an outlet of an air pre-warming device and a set temperature target, and regulating the inlet air quantity through a cylinder body air inlet regulating valve until the temperatures of the cylinder bodies of a high-pressure cylinder and a medium-pressure cylinder of the steam turbine reach a temperature state start condition; after the cylinder body is pre-warmed by air, stopping the air pre-warming device, closing the high-pressure regulating valve, the high-pressure cylinder warming cylinder air inlet regulating valve, the medium-pressure regulating valve and the medium-pressure cylinder warming cylinder air inlet regulating valve, and enabling the unit to enter a normal temperature state starting program;
when the temperature rising rates of the cylinder bodies of the high-pressure cylinder and the medium-pressure cylinder of the steam turbine are different, the air quantity entering the high-pressure cylinder and the medium-pressure cylinder of the steam turbine is controlled through the opening degrees of the high-pressure cylinder warming air inlet regulating valve and the medium-pressure cylinder warming air inlet regulating valve respectively, and the temperature rising rates and the final cylinder body temperatures of the high-pressure cylinder and the medium-pressure cylinder of the steam turbine are controlled.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412552A (en) * | 2020-10-15 | 2021-02-26 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Rapid air pre-warming starting system of steam turbine set |
| CN113417707A (en) * | 2021-07-07 | 2021-09-21 | 中国能源建设集团广东省电力设计研究院有限公司 | Quick start system of circulation combined unit |
| CN113623026A (en) * | 2021-09-07 | 2021-11-09 | 济南奔腾时代电力科技有限公司 | Steam turbine high-pressure cylinder warming and cylinder switching control optimization method |
| CN115263447A (en) * | 2022-08-02 | 2022-11-01 | 西安热工研究院有限公司 | Cold-state pre-warming control system of gas-steam combined cycle unit |
| CN115263448A (en) * | 2022-08-02 | 2022-11-01 | 西安热工研究院有限公司 | Cold-state pre-warming starting control test method for steam turbine of gas-steam combined cycle unit |
| CN113417707B (en) * | 2021-07-07 | 2024-05-31 | 中国能源建设集团广东省电力设计研究院有限公司 | Quick starting system of circulation combined unit |
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2020
- 2020-07-30 CN CN202010749388.0A patent/CN111894683A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412552A (en) * | 2020-10-15 | 2021-02-26 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Rapid air pre-warming starting system of steam turbine set |
| CN113417707A (en) * | 2021-07-07 | 2021-09-21 | 中国能源建设集团广东省电力设计研究院有限公司 | Quick start system of circulation combined unit |
| CN113417707B (en) * | 2021-07-07 | 2024-05-31 | 中国能源建设集团广东省电力设计研究院有限公司 | Quick starting system of circulation combined unit |
| CN113623026A (en) * | 2021-09-07 | 2021-11-09 | 济南奔腾时代电力科技有限公司 | Steam turbine high-pressure cylinder warming and cylinder switching control optimization method |
| CN115263447A (en) * | 2022-08-02 | 2022-11-01 | 西安热工研究院有限公司 | Cold-state pre-warming control system of gas-steam combined cycle unit |
| CN115263448A (en) * | 2022-08-02 | 2022-11-01 | 西安热工研究院有限公司 | Cold-state pre-warming starting control test method for steam turbine of gas-steam combined cycle unit |
| CN115263447B (en) * | 2022-08-02 | 2023-10-13 | 西安热工研究院有限公司 | Cold state preheating control system of gas-steam combined cycle unit |
| CN115263448B (en) * | 2022-08-02 | 2023-12-01 | 西安热工研究院有限公司 | Cold state pre-heating start control test method for gas-steam combined cycle unit steam turbine |
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