CN214887257U - Pre-warming cooling system for steam turbine of power plant - Google Patents
Pre-warming cooling system for steam turbine of power plant Download PDFInfo
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- CN214887257U CN214887257U CN202120001393.3U CN202120001393U CN214887257U CN 214887257 U CN214887257 U CN 214887257U CN 202120001393 U CN202120001393 U CN 202120001393U CN 214887257 U CN214887257 U CN 214887257U
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Abstract
The utility model discloses a power plant steam turbine pre-heating cooling system, which comprises a high pressure cylinder, a middle pressure cylinder, a low pressure cylinder and a condenser, wherein the high pressure cylinder, the middle pressure cylinder, the low pressure cylinder and the condenser are sequentially arranged; the adjacent machine cooling is connected with an auxiliary steam main pipe of an adjacent machine auxiliary steam system through a temperature regulating valve taking condensed water as a temperature regulating medium, the auxiliary steam main pipe of the adjacent machine auxiliary steam system is connected with an auxiliary steam main pipe of the auxiliary steam system of the adjacent machine through an auxiliary steam main pipe communicating valve, and the auxiliary steam main pipe of the auxiliary steam system of the adjacent machine is connected with a high exhaust pipe leading to a high pressure cylinder through a steam inlet valve of a warming/cooling machine. The utility model discloses low carbon is high-efficient, practice thrift the investment.
Description
Technical Field
The utility model relates to a power plant steam turbine warms up cooling system in advance.
Background
The high-parameter and high-capacity steam turbine has large thermal inertia, longer starting and stopping time and larger influence on the starting time and the stopping and overhauling period of the unit. In order to shorten the start-up and shutdown cooling time, the power plant generally adopts the warm-up and forced cooling method to accelerate the start-up and cooling speed of the steam turbine. The commonly adopted pre-heating mode is steam warming, and the cooling mode is compressed air cooling. The prior art has the following defects: (1) two sets of systems of warming and cooling are required to be added, the system is complex, and the investment cost is high; (2) a heating device is required to be arranged in a compressed air cooling mode, so that the energy consumption is high, and the low-carbon energy-saving concept is not met; (3) in the process of rapid cooling, accidents such as interruption of compressed air or incapability of controlling temperature due to power failure of an air heater occur, and thermal shock can be generated on a rotor and a cylinder.
Disclosure of Invention
An object of the utility model is to provide a low carbon is high-efficient, practice thrift the power plant steam turbine cooling system that warms up in advance of investment.
The technical solution of the utility model is that:
the utility model provides a power plant steam turbine cooling system that warms up in advance, is including the high pressure jar, the intermediate pressure jar, the low pressure jar, the gas condenser that constitute the steam turbine, and high pressure jar, intermediate pressure jar, low pressure jar, gas condenser set gradually, characterized by: each steam turbine unit is provided with an auxiliary steam system, and the high-pressure cylinder is connected with the steam turbine unit through a high-discharge check valve; the adjacent machine cooling is connected with an auxiliary steam main pipe of an adjacent machine auxiliary steam system through a temperature regulating valve taking condensed water as a temperature regulating medium, the auxiliary steam main pipe of the adjacent machine auxiliary steam system is connected with an auxiliary steam main pipe of the auxiliary steam system of the adjacent machine through an auxiliary steam main pipe communicating valve, and the auxiliary steam main pipe of the auxiliary steam system of the adjacent machine is connected with a high exhaust pipe leading to a high pressure cylinder through a steam inlet valve of a warming/cooling machine.
The high-discharge check valve is connected with the backflow valve in parallel.
The auxiliary steam system is a heating and standby steam supply system related to the starting, stopping and normal operation of a boiler, a steam turbine and auxiliary equipment of the boiler, the steam turbine and the auxiliary equipment except for main steam-water circulation of a thermal power plant, a steam source is cold and then condensed water is used as a temperature regulating medium. Two or more units are connected with the auxiliary steam system, and the auxiliary steam of the adjacent unit is used in the starting and stopping stages of the units.
The utility model has the advantages that: (1) the system realizes two functions of pre-warming and rapid cooling, is simple and saves equipment investment cost; (2) the cooling efficiency is higher than that of the traditional compressed air cooling mode; (3) the temperature of the cooling steam is controllable, a temperature control device does not need to be additionally arranged, the investment cost is saved, and the device is low-carbon and efficient.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
A power plant steam turbine pre-warming cooling system comprises a high pressure cylinder 1, an intermediate pressure cylinder 2, a low pressure cylinder 3 and a condenser 4 which form a steam turbine, wherein the high pressure cylinder, the intermediate pressure cylinder, the low pressure cylinder and the condenser are sequentially arranged, each steam turbine unit is provided with an auxiliary steam system, and the high pressure cylinder is connected with the steam turbine unit through high-exhaust check valves 5 and 6; the adjacent machine cooling is connected with an auxiliary steam main pipe 8 of an adjacent machine auxiliary steam system through a temperature regulating valve 7 taking condensed water as a temperature regulating medium, the auxiliary steam main pipe of the adjacent machine auxiliary steam system is connected with an auxiliary steam main pipe 10 of the auxiliary steam system of the machine through an auxiliary steam main pipe communicating valve 9, and the auxiliary steam main pipe of the auxiliary steam system of the machine is connected with a high exhaust pipe 12 leading to a high pressure cylinder through a warm-up/cold-machine steam inlet valve 11.
The high-discharge check valve 5 is connected with the backflow valve in parallel.
The working process is as follows:
pre-warming: after the steam turbine is put into service to seal steam and establish vacuum, the warming-up system is put into service in the state of turning gear. The temperature of the auxiliary steam system is adjusted through the temperature adjusting valve 7, the warm-up steam inlet valve is slowly opened to pre-warm the pipeline, and the warm-up rate is adjusted through adjusting the opening degree of the warm-up/cold machine steam inlet valve.
And (3) rapid cooling: after the rotating speed of the steam turbine is reduced to zero, the temperature of the auxiliary steam system is adjusted through the temperature adjusting valve 7 in a turning state, and after the temperature meets the requirement, the steam inlet valve of the warming/cooling machine is opened, the flow is controlled well, and cooling is performed.
The pre-warming and cooling steam trends were the same: an adjacent machine auxiliary steam main pipe, a local machine auxiliary steam main pipe, a warm machine/cold machine steam inlet valve, a high exhaust pipe, a steam turbine high pressure cylinder, a medium pressure cylinder, a low pressure cylinder and a condenser.
Claims (2)
1. The utility model provides a power plant steam turbine cooling system that warms up in advance, is including the high pressure jar, the intermediate pressure jar, the low pressure jar, the gas condenser that constitute the steam turbine, and high pressure jar, intermediate pressure jar, low pressure jar, gas condenser set gradually, characterized by: each steam turbine unit is provided with an auxiliary steam system, and the high-pressure cylinder is connected with the steam turbine unit through a high-discharge check valve; the adjacent machine cooling is connected with an auxiliary steam main pipe of an adjacent machine auxiliary steam system through a temperature regulating valve taking condensed water as a temperature regulating medium, the auxiliary steam main pipe of the adjacent machine auxiliary steam system is connected with an auxiliary steam main pipe of the auxiliary steam system of the adjacent machine through an auxiliary steam main pipe communicating valve, and the auxiliary steam main pipe of the auxiliary steam system of the adjacent machine is connected with a high exhaust pipe leading to a high pressure cylinder through a steam inlet valve of a warming/cooling machine.
2. The system of claim 1, wherein the system further comprises: the high-discharge check valve is connected with the backflow valve in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120001393.3U CN214887257U (en) | 2021-01-04 | 2021-01-04 | Pre-warming cooling system for steam turbine of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120001393.3U CN214887257U (en) | 2021-01-04 | 2021-01-04 | Pre-warming cooling system for steam turbine of power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214887257U true CN214887257U (en) | 2021-11-26 |
Family
ID=78863711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120001393.3U Active CN214887257U (en) | 2021-01-04 | 2021-01-04 | Pre-warming cooling system for steam turbine of power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214887257U (en) |
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2021
- 2021-01-04 CN CN202120001393.3U patent/CN214887257U/en active Active
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220601 Address after: 210015 building 3, No. 201, Yanjiang Road, Gulou District, Nanjing, Jiangsu Province Patentee after: Huaneng International Power Jiangsu energy development Co.,Ltd. Patentee after: Nantong Power Plant of Huaneng International Power Jiangsu energy development Co., Ltd Address before: 226000 Gangzha District, Nantong City, Jiangsu Province Patentee before: HUANENG POWER INTERNATIONAL Inc. NANTONG POWER PLANT |