阅读说明：本技术 一种汽轮机组空气预暖快速启动系统 (Rapid air pre-warming starting system of steam turbine set ) 是由 赵文波 戴义勇 金杰 刘宝民 孙学革 青可儿 高世杰 杨国强 季鹏飞 张振华 刘 于 2020-10-15 设计创作，主要内容包括：本发明涉及汽轮机技术领域,具体为一种汽轮机组空气预暖快速启动系统,包括汽轮机高压缸,所述汽轮机高压缸的一侧安装有中压缸与低压缸,所述低压缸的输出端安装有凝汽器,所述凝汽器的一侧安装有真空破坏阀,所述汽轮机高压缸的下方设置有空气预暖装置,所述空气预暖装置与汽轮机高压缸的连接处设置有高压缸暖缸进汽调节阀、高压主汽阀、高压主汽阀后疏水阀与高压调节阀。本发明设计了一种汽轮机启动空气预暖系统,在机组冷态启动时,预先投入空气预暖系统来加热汽轮机的缸体,使机组从原来的冷态启动转变为温态启动,缩短机组的启动时间,践行了节能减排的方针政策。(The invention relates to the technical field of turbines, in particular to an air pre-warming quick starting system of a steam turbine unit, which comprises a high-pressure cylinder of a steam turbine, wherein a middle-pressure cylinder and a low-pressure cylinder are installed on one side of the high-pressure cylinder of the steam turbine, a condenser is installed at the output end of the low-pressure cylinder, a vacuum breaking valve is installed on one side of the condenser, an air pre-warming device is arranged below the high-pressure cylinder of the steam turbine, and a high-pressure cylinder warming cylinder steam inlet regulating valve, a high-pressure main steam valve rear drain valve and a high-pressure regulating valve are arranged at the joint of the. The invention designs a steam turbine starting air pre-warming system, when a unit is started in a cold state, the air pre-warming system is put into the unit in advance to heat a cylinder body of a steam turbine, so that the unit is changed from the original cold state starting to a warm state starting, the starting time of the unit is shortened, and the policy of energy conservation and emission reduction is practiced.)

1. The utility model provides a quick start-up system of steam turbine unit air warms up in advance, includes steam turbine high pressure cylinder (1), its characterized in that, intermediate pressure cylinder (2) and low pressure cylinder (14) are installed to one side of steam turbine high pressure cylinder (1), condenser (15) are installed to the output of low pressure cylinder (14), vacuum destruction valve (16) are installed to one side of condenser (15), the below of steam turbine high pressure cylinder (1) is provided with air warms up device (13), air warms up device (13) and the junction of steam turbine high pressure cylinder (1) and is provided with high pressure cylinder warm up cylinder steam inlet regulating valve (11), high pressure main steam valve (3), drain valve (9) and high pressure governing valve (4) behind high pressure main steam valve, high pressure cylinder warm up steam inlet regulating valve (11), intermediate pressure governing valve (8) are installed with the junction of intermediate pressure cylinder (13) to air warms up device (13), air warms up cylinder (2), The steam turbine is characterized by comprising a middle-pressure main steam valve (7) and a middle-pressure main steam valve rear drain valve (10), wherein a high-pressure cylinder steam exhaust check valve (5) and a high-pressure cylinder steam exhaust ventilation valve (6) are installed on one side of a high-pressure cylinder (1) of the steam turbine.

2. The air pre-warming quick start system of the steam turbine unit as claimed in claim 1, wherein the steam turbine high-pressure cylinder (1) is connected with the main steam pipeline through a high-pressure main steam valve (3) and a high-pressure regulating valve (4), the steam exhaust part of the steam turbine high-pressure cylinder (1) is connected with the high-pressure steam exhaust pipeline through a high-pressure cylinder steam exhaust check valve (5), and is connected with a condenser (15) through a high-pressure cylinder steam exhaust ventilation valve (6), the intermediate-pressure cylinder (2) is connected with the intermediate-pressure main steam valve (7) and a hot steam pipeline through an intermediate-pressure regulating valve (8), the intermediate-pressure cylinder (2) is connected with the low-pressure cylinder (14) through a steam guide pipeline, the low-pressure cylinder (14) is connected with the condenser (15), and the condenser (15) is connected with the vacuum breaking valve (16).

3. The air pre-warming quick start system of the steam turbine set according to claim 1, characterized in that the air pre-warming device (13) is connected with the high-pressure cylinder warming cylinder steam inlet regulating valve (11) through an air conveying pipeline, the high-pressure main steam valve rear steam trap (9) and the high-pressure main steam valve (3) are connected with the high-pressure regulating valve (4), the air pre-warming device (13) is connected with the medium-pressure cylinder warming cylinder steam inlet regulating valve (12) through an air conveying pipeline, and the medium-pressure main steam valve rear steam trap (10) and the medium-pressure main steam valve (7) are connected with the medium-pressure regulating valve (8).

4. The steam turbine set air pre-warming quick start system according to claim 1, wherein the air pre-warming device (13) enters the access point of the steam turbine high pressure cylinder (1) through an air delivery pipeline, not only the drain pipelines of the high pressure main steam valve (3) and the high pressure regulating valve (4), but also all the drain access points connected with the steam turbine high pressure cylinder (1), such as the drain of the pipeline of the high pressure regulating valve (4) connected with the steam turbine high pressure cylinder (1), the drain of the body of the steam turbine high pressure cylinder (1), and the like.

5. The steam turbine set air pre-warming quick start system according to claim 1, characterized in that the air pre-warming device (13) enters the access point of the intermediate pressure cylinder (2) through an air delivery pipeline, not only the drainage pipeline of the intermediate pressure main steam valve (7) and the intermediate pressure regulating valve (8), but also all the drainage access points connected with the intermediate pressure cylinder (2), such as drainage of the pipeline of the intermediate pressure regulating valve (8) connected with the intermediate pressure cylinder (2), drainage of the body of the intermediate pressure cylinder (2) and the like.

6. The air pre-warming quick start system of the steam turbine unit according to claim 1, wherein the exhaust steam of the high-pressure turbine cylinder (1) not only passes through the high-pressure turbine cylinder exhaust steam vent valve (6) and the condenser (15), but also comprises any pipeline and system for exhausting the high-pressure turbine cylinder (1) and the condenser (15), such as drainage of a cylinder body of the high-pressure turbine cylinder (1), drainage of a pipeline in front of the high-exhaust check valve (5), and the like.

7. A turbo-set air pre-warming quick start system according to claim 1, wherein the air pre-warming device (13) can be any type of air heating device, and the air source of the air pre-warming device (13) is not only plant compressed air, including air from any place.

Technical Field

The invention relates to the technical field of steam turbines, in particular to a quick air pre-warming starting system for a steam turbine set.

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.

However, the traditional thermal power generating unit is limited by the design and manufacturing structure and process materials, and the heating rate of the steam turbine unit body is required, and the actual cold start time of the unit is about 10-16 hours from the ignition of a boiler to the full load of the unit, so that the huge waste of start fuel is caused, and the stable operation of a power grid is influenced. Accordingly, one skilled in the art has provided a steam turbine unit air pre-warming quick start system to address the problems set forth in the background above.

Disclosure of Invention

The invention aims to provide a steam turbine set air pre-warming quick start system to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a quick start-up system of steam turbine unit air warms up in advance, includes the steam turbine high pressure jar, intermediate pressure jar and low pressure jar are installed to one side of steam turbine high pressure jar, the condenser is installed to the output of low pressure jar, the vacuum damage valve is installed to one side of condenser, the below of steam turbine high pressure jar is provided with the air warms up the device in advance, the air warms up the device in advance and is provided with behind high pressure jar warm brakeage governing valve, the high pressure main steam valve trap and the high pressure governing valve with the junction of steam turbine high pressure jar, the steam trap behind high pressure jar warm brakeage governing valve, intermediate pressure main steam valve and the intermediate pressure main steam valve is installed to the air warms up the device in advance and the junction of intermediate pressure jar, high pressure jar exhaust check valve and high pressure jar exhaust ventilation.

As a still further scheme of the invention: the steam turbine high pressure jar is connected with main steam pipeline through high-pressure main steam valve and high pressure governing valve, steam turbine high pressure jar exhaust part is connected with high-pressure exhaust pipeline through high pressure jar exhaust check valve, links to each other with the condenser through high pressure jar exhaust vent valve, the intermediate pressure jar is connected with hot steam pipeline through intermediate pressure governing valve and intermediate pressure main steam valve, the intermediate pressure jar links to each other with the low pressure jar through leading the steam pipeline, the low pressure jar links to each other with the condenser, the condenser links to each other with the vacuum destruction valve.

As a still further scheme of the invention: the air pre-heating device is connected with a steam inlet regulating valve of a high-pressure cylinder warm cylinder through an air conveying pipeline, a drain valve behind a high-pressure main steam valve is connected with the high-pressure regulating valve with the high-pressure main steam valve, the air pre-heating device is connected with a steam inlet regulating valve of a medium-pressure cylinder warm cylinder through an air conveying pipeline, and the drain valve behind the medium-pressure main steam valve is connected with the medium-pressure regulating valve with a medium-pressure main steam valve.

As a still further scheme of the invention: the air pre-warming device enters an access point of a high-pressure cylinder of the steam turbine through an air conveying pipeline, not only is a drain pipeline of a high-pressure main steam valve and a high-pressure regulating valve, but also comprises all drain access points connected with the high-pressure cylinder of the steam turbine, and if the high-pressure regulating valve is connected with the high-pressure cylinder of the steam turbine, a pipeline is drained, and the body of the high-pressure cylinder of the steam turbine is drained.

As a still further scheme of the invention: the air pre-warming device enters an access point of the intermediate pressure cylinder through an air conveying pipeline, not only is a drainage pipeline of the intermediate pressure main steam valve and the intermediate pressure regulating valve, but also comprises all drainage access points connected with the intermediate pressure cylinder, such as drainage of a pipeline connected with the intermediate pressure cylinder by the intermediate pressure regulating valve, drainage of a body of the intermediate pressure cylinder and the like.

As a still further scheme of the invention: the exhaust of the high-pressure cylinder of the steam turbine is not only connected with the condenser through the exhaust ventilation valve of the high-pressure cylinder, but also comprises any pipeline and system for exhausting the high-pressure cylinder of the steam turbine and the condenser, such as drainage of a cylinder body of the high-pressure cylinder of the steam turbine, drainage of a pipeline in front of a high-pressure exhaust check valve and the like.

As a still further scheme of the invention: the air pre-warming device can be any type of air heating device, and the air source of the air pre-warming device is not only factory compressed air, but also air from any place.

Compared with the prior art, the invention has the beneficial effects that: the invention designs a steam turbine starting air pre-warming system, when a unit is started in a cold state, the air pre-warming system is put into the unit in advance to heat a cylinder body of the steam turbine, so that the unit is changed from the original cold state starting to a warm state starting, the starting time of the unit is shortened by nearly half, the starting efficiency of the unit is improved, the starting fuel cost and the starting cost of the unit are saved, and the policy of energy conservation and emission reduction is further practiced.

Drawings

Fig. 1 is a schematic view of an operation structure of a steam turbine set air pre-warming quick start system.

In the figure: 1. a high-pressure cylinder of the steam turbine; 2. an intermediate pressure cylinder; 3. a high pressure main steam valve; 4. a high pressure regulating valve; 5. a high pressure cylinder exhaust check valve; 6. a high pressure cylinder exhaust vent 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 middle-pressure main steam valve rear drain valve; 11. a high-pressure cylinder warm cylinder steam inlet regulating valve; 12. the medium pressure cylinder warms up the cylinder air admission control valve; 13. an air pre-warming device; 14. a low pressure cylinder; 15. a condenser; 16. the vacuum breaks the valve.

Detailed Description

Referring to fig. 1, in an embodiment of the present invention, an air pre-warming fast start system for a steam turbine set includes a high-pressure steam turbine cylinder 1, a medium-pressure cylinder 2 and a low-pressure cylinder 14 are installed at one side of the high-pressure steam turbine cylinder 1, a condenser 15 is installed at an output end of the low-pressure cylinder 14, a vacuum breaker 16 is installed at one side of the condenser 15, an air pre-warming device 13 is installed below the high-pressure steam turbine cylinder 1, a high-pressure steam cylinder warming steam inlet regulating valve 11, a high-pressure main steam valve 3, a high-pressure main steam valve rear drain valve 9 and a high-pressure regulating valve 4 are installed at a connection between the air pre-warming device 13 and the high-pressure steam turbine cylinder 1, a high-pressure steam cylinder warming steam inlet regulating valve 11, a medium-pressure regulating valve 8, a medium-pressure main steam valve 7 and a medium-pressure main steam valve rear drain valve 10 are installed at a connection between the air pre-warming device 13 and the medium-, the high-pressure steam turbine cylinder 1 is connected with a main steam pipeline through a high-pressure main steam valve 3 and a high-pressure regulating valve 4, the steam exhaust part of the high-pressure steam turbine cylinder 1 is connected with the high-pressure steam exhaust pipeline through a high-pressure cylinder steam exhaust check valve 5 and is connected with a condenser 15 through a high-pressure cylinder steam exhaust ventilation valve 6, the intermediate-pressure cylinder 2 is connected with a medium-pressure main steam valve 7 and a hot steam pipeline through an intermediate-pressure regulating valve 8, the intermediate-pressure cylinder 2 is connected with a low-pressure cylinder 14 through a steam guide pipeline, the low-pressure cylinder 14 is connected with the condenser 15, the condenser 15 is connected with a vacuum breaker valve 16, an air pre-heater 13 is connected with a high-pressure cylinder steam inlet regulating valve 11 through an air conveying pipeline, a high-pressure main steam valve rear drain valve 9 is connected with the high-pressure main steam valve 3 and the high-pressure regulating valve 4, the air pre-heater 13 is connected with the intermediate-pressure cylinder steam inlet regulating valve 12 through an air conveying, the air pre-heating device 13 enters the access point of the high-pressure turbine cylinder 1 through an air conveying pipeline, not only the drain pipelines of the high-pressure main steam valve 3 and the high-pressure regulating valve 4, but also all the drain access points connected with the high-pressure turbine cylinder 1, such as the drain pipelines of the high-pressure regulating valve 4 connected with the high-pressure turbine cylinder 1, the drain of the body of the high-pressure turbine cylinder 1, and the like, the air pre-heating device 13 enters the access point of the intermediate pressure cylinder 2 through the air conveying pipeline, not only the drain pipelines of the medium-pressure main steam valve 7 and the medium-pressure regulating valve 8, but also all the drain access points connected with the intermediate pressure cylinder 2, such as the drain pipelines of the medium-pressure regulating valve 8 connected with the intermediate pressure cylinder 2, the drain of the body of the intermediate pressure cylinder 2, and the like, the exhaust steam of the high-pressure turbine cylinder 1 not only passes through the exhaust steam valve 6 and the condenser 15, the air pre-heating device 13 can be any type of air heating device, such as the drainage of the cylinder body of the high-pressure cylinder 1 of the steam turbine, the drainage of the pipeline in front of the steam exhaust check valve 5 of the high-pressure cylinder, and the like, and the air source of the air pre-heating device 13 is not only factory compressed air, but also air from any place.

The working principle of the invention is as follows: borrow by above-mentioned scheme, when turbo generator set starts, before the boiler ignition, start air preheating system heating steam turbine high pressure cylinder 1 and intermediate pressure cylinder 2, when preheating steam turbine high pressure cylinder 1 of unit, the through-flow mode of system is: close high-pressure cylinder steam extraction check valve 5, high-pressure main steam valve 3, high-pressure main steam valve back trap 9, open the warm jar of high-pressure cylinder steam admission governing valve 11, high-pressure governing valve 4, high-pressure cylinder steam extraction vent valve 6 of warm system in advance, start air warms up device 13 in advance and heats its inside gas, gas after the heating gets into steam turbine high pressure cylinder 1 through above-mentioned air guide pipeline and heats it, when warming up group intermediate pressure cylinder 2 in advance, the through-flow mode of system is: closing the middle-pressure main steam valve 7 and the middle-pressure main steam valve rear drain valve 10, opening a middle-pressure cylinder warming air inlet adjusting valve 12 and a middle-pressure adjusting valve 8 of the pre-warming system, starting an air pre-warming device 13 to heat air in the pre-warming system, enabling the heated air to enter a low-pressure cylinder 14 and a condenser 15 through the air guide pipeline, and finally discharging the heated air through a vacuum breaking valve 16.

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 are equivalent to or changed within the technical scope of the present invention.