CN213298063U - Unit cold-state starting adjacent machine auxiliary steam heating furnace system - Google Patents
Unit cold-state starting adjacent machine auxiliary steam heating furnace system Download PDFInfo
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- CN213298063U CN213298063U CN202022136385.8U CN202022136385U CN213298063U CN 213298063 U CN213298063 U CN 213298063U CN 202022136385 U CN202022136385 U CN 202022136385U CN 213298063 U CN213298063 U CN 213298063U
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- reheater
- superheater
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- steam
- valve
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 238000003303 reheating Methods 0.000 claims abstract description 5
- 238000010792 warming Methods 0.000 abstract description 9
- 239000000446 fuel Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000843 powder Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Abstract
The utility model discloses a unit cold-state starting adjacent machine auxiliary steam heating furnace system, which relates to the technical field of auxiliary steam heating large machines before starting a coal-fired thermal power generating unit, and comprises a high-discharge check valve, a reheater, a superheater and an auxiliary steam main pipe, wherein the reheater is connected with a cold-section reheating pipe, a check valve and a cold-section to auxiliary steam regulating valve are connected in series on a pipeline between the cold-section reheating pipe and the auxiliary steam main pipe, and the bypass valve is connected in parallel with the check valve; a high-exhaust check valve is arranged on a pipeline between the reheater and the steam turbine, and a high-bypass pressure regulating valve is arranged on a high-pressure bypass pipeline between the reheater and the superheater. The utility model has the advantages that: before the unit is started, auxiliary steam is introduced into a reheater system and a superheater system through a newly-added bypass valve, and the reheater and the superheater are simultaneously preheated to improve the temperature level of the reheater and the superheater; the reheater is firstly pressed to support the high-exhaust check valve of the steam turbine, so that the leakage amount of steam of the steam turbine warming machine from the high-exhaust check valve is reduced, the starting time is effectively saved, and the cold-state starting fuel consumption of the unit is reduced.
Description
Technical Field
The utility model relates to a big quick-witted technical field of supplementary steam heating before coal-fired thermal generator set starts, concretely relates to cold-state start-up neighbour's quick-witted supplementary steam heating stove system of unit.
Background
During the starting process of the coal-fired thermal power generating set, before the set is started and when the auxiliary steam heats the large machine, the auxiliary steam can be poured into the main steam system, and the auxiliary steam flows through the air door of the steam pocket to heat the heating surface along the way.
In the prior art, each unit of the power plant is provided with an auxiliary steam system large engine heating pipeline, and a large engine rotor is pre-heated before the unit is started through auxiliary steam of an adjacent engine in the cold-state starting of the unit, so that the aims of saving starting time and reducing fuel consumption are fulfilled, and a better effect is achieved in practical application. In the auxiliary steam warming machine before starting, because the high-exhaust check valve is not closed tightly, the auxiliary steam enters the cold-section reheating pipe through the large machine warming valve and the high-exhaust check valve, so that the reheater is pressurized and preheats the reheater pipe, and in the previous starting of the unit, the wall temperature of the reheater pipe reaches 115 ℃ two hours after the large machine auxiliary steam warming machine and before the boiler is ignited; meanwhile, the water inlet temperature of the boiler is gradually increased to about 130 ℃ by heating through a deaerator, and pre-heating and temperature rising of a boiler economizer, a cladding pipe, a water-cooled wall, a steam pocket and a water system header are completed.
Although the economizer, the cladding pipe, the water wall, the steam drum and the water system header can be ensured to have a certain temperature level before the ignition of the boiler by adopting the proper stress control means, the following problems still exist: when the steam turbine is assisted to heat a large steam turbine, the high-exhaust check valve is not closed tightly under the action of steam pressure of the steam turbine, so that the heating effect of the steam turbine is influenced; the heating surfaces of the secondary superheater, the platen superheater, the primary superheater, the ceiling superheater and the side-wrapped superheater are not pre-warmed, and the overall temperature level is lower.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a steam heating furnace system is assisted to adjacent quick-witted cold-starting of unit, can solve when assisting the big machine of steam heating because the high exhaust back stop door closes the warm-up effect, the second grade over heater, platen superheater, one-level over heater, ceiling over heater and the side package over heater heating surface of not strictly influencing the steam turbine under the effect of warm-up steam pressure and fail to obtain the problem of warmly in advance, that the bulk temperature level is lower.
In order to solve the technical problem, the utility model adopts the technical scheme that: the system comprises a high-emission check valve, a reheater, a superheater and an auxiliary steam main pipe, wherein the reheater is connected with a cold-section reheater pipe, a check valve and a cold-section to auxiliary steam regulating valve are connected in series on a pipeline between the cold-section reheater pipe and the auxiliary steam main pipe, the auxiliary steam main pipe is connected with cold-section reheated steam through a steam supply source pipeline, the cold-section to auxiliary steam regulating valve is arranged close to the reheater, the check valve is arranged close to the auxiliary steam main pipe, a bypass valve is arranged on a pipeline between the cold-section to auxiliary steam regulating valve and the auxiliary steam main pipe, and the bypass valve and the check valve are arranged in parallel;
the high-pressure bypass type steam turbine reheater is characterized in that a high-pressure exhaust check valve is installed on a pipeline between the reheater and the steam turbine, a high-pressure bypass pressure adjusting valve is arranged on a high-pressure bypass pipeline between the reheater and the superheater, the outlet end of the reheater is connected with a medium-pressure cylinder of the steam turbine through a pipeline, and the superheater is connected with a high-pressure cylinder of the steam turbine through a pipeline.
Furthermore, the high-pressure bypass pipeline is a branch of a pipeline from a cold-section reheating pipe connected with the reheater to the high-discharge check valve, the high-bypass pressure regulating valve is arranged on the branch, and the branch is respectively connected with the reheater and the superheater.
Further, the superheater comprises a secondary superheater, a platen superheater, a primary superheater, a ceiling superheater and a side packet superheater.
After adopting the structure, the utility model has the advantages that: before the unit is started, auxiliary steam is introduced into a reheater system through a newly-added bypass valve and a cold section reheater pipe, and is shunted to a superheater system through a high-pressure bypass, and the reheater and the superheater are pre-warmed to improve the temperature level of the reheater and the superheater, so that the temperature rise and pressure rise time after ignition of the boiler is reduced, and the air temperature can be improved, so that the powder feeding purpose is achieved in advance;
meanwhile, the reheater firstly presses against the high-exhaust check valve of the steam turbine, so that the problem that the closing of the high-exhaust check valve is not tight when the steam turbine is assisted to warm a large engine can be solved, the leakage amount of steam of the steam turbine warming machine from the high-exhaust check valve is reduced, the warming effect of the steam turbine is improved, the starting time is effectively saved, and the consumption of fuel oil for cold starting of the unit is further reduced.
Drawings
Fig. 1 is a schematic connection diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, the following technical solutions are adopted in the present embodiment: the system comprises a high-exhaust check valve 2, a reheater 3, a superheater 4 and an auxiliary steam main pipe 5, wherein the reheater 3 is connected with a cold-section reheater pipe 6, a check valve 7 and a cold-section-to-auxiliary steam regulating valve 8 are connected in series on a pipeline between the cold-section reheater pipe 6 and the auxiliary steam main pipe 5, the auxiliary steam main pipe 5 is connected with cold-section reheated steam through a steam supply source pipeline, a main pipe is adopted for a unit auxiliary steam system, one steam supply source pipeline is arranged from the cold-section reheated steam to the auxiliary steam main pipe 5 of each unit, the cold-section-to-auxiliary steam regulating valve 8 is arranged close to the reheater 3, the check valve 7 is arranged close to the auxiliary steam main pipe 5, the auxiliary steam is prevented from flowing back to the cold-reheat system when the unit operates at low load, a bypass valve 9 is arranged on a pipeline between the cold-section-to-auxiliary steam regulating valve 8 and the auxiliary steam main pipe 5, the bypass valve 9 is arranged in parallel with the check valve 7, the pipeline between the reheater 3 and the steam turbine 1 is, a high-pressure bypass pipeline between the reheater 3 and the superheater 4 is provided with a high-pressure bypass pressure regulating valve 10, the high-pressure bypass pipeline is a branch pipeline from a cold-section reheater pipe 6 connected with the reheater 3 to a pipeline between the high-discharge check valve 2, the high-pressure bypass pressure regulating valve 10 is arranged on the branch pipeline, the branch pipeline is respectively connected with the reheater 3 and the superheater 4, and the superheater 4 is connected with a high-pressure cylinder 12 of the steam turbine 1 through a pipeline.
Install bypass valve 9 additional, introduce reheater 3 system through newly-increased bypass valve 9 through cold section reheater pipe 6 with supplementary steam before the unit starts, shunt to over heater 4 system through the high pressure bypass simultaneously, over heater 4 includes second grade over heater, the platen superheater, the first grade over heater, ceiling over heater and side package over heater, simultaneously to reheater 3, over heater 4 warms up in advance, improve over heater 4 whole heating surface and reheater 3 temperature level, with the time of rising the temperature and boosting after reducing the boiler ignition, can also reach the mesh of throwing the powder in advance with the wind temperature improvement, because reheater 3 is first to be brought up pressure and withstood steam turbine high exhaust back valve 2, can improve steam turbine warm-up effect, thereby effectively practice thrift the start-up time, further reduce unit cold-state start fuel consumption.
The operation was as follows:
1. the method comprises the following steps that a steam turbine condenser is established in vacuum, a large locomotive is normally turned, a circulating water and condensate system is normally operated, a machine side auxiliary steam warming machine starts to work, a boiler has auxiliary steam warming conditions, under the condition that a cold section to an auxiliary steam adjusting valve 8 and a high side pressure adjusting valve 10 are closed, a newly-added valve bypass valve 9 connected with a check valve 7 in parallel behind the cold section to the auxiliary steam adjusting valve 8 is opened, then the cold section to the auxiliary steam adjusting valve 8 is slowly opened, and a system pipeline is warmed, a machine side main steam pipe drain valve and a main steam valve front drain valve are kept in an open state;
2. slowly opening a bypass valve 8 from a cold section of the reheater 3 to the auxiliary steam check valve, opening a high bypass pressure regulating valve 10, and controlling the temperature rise and the pressure rise rate of the reheater 3 and the superheater 4 by using the cold section of the reheater to the auxiliary steam regulating valve 8;
3. after the reheater 3 is pressurized, a reheater inlet header drain valve, a reheater outlet header drain valve and an emptying valve are closed step by step, and the reheater 3 is pressurized to support a steam turbine high-exhaust check valve 2;
4. after the superheater 4 is pressurized, according to the auxiliary steam heating process, after the temperature of a drain valve is measured by an infrared thermometer on site, a secondary superheater outlet header drain valve, an emptying valve, a secondary superheater inlet header drain valve, a screen superheater outlet header emptying valve, a screen superheater inlet header drain valve, a primary superheater outlet emptying valve, a ceiling superheater inlet header drain valve and a side-packet superheater lower header drain valve are closed step by step in sequence;
5. in the auxiliary steam heating process, the metal wall temperature of each part of the furnace tube is closely monitored, and the opening and closing of a drain valve and an emptying valve are controlled according to the change of the wall temperature;
6. before the boiler is ignited, the auxiliary steam heating boiler is stopped, and the cold section is closed to the auxiliary steam check valve 7 and the bypass valve 9.
The components of the high-discharge check valve 2, the check valve 7, the cold section-auxiliary steam regulating valve 8, the bypass valve 9, the high-bypass pressure regulating valve 10 and the like are all universal standard components or components known by those skilled in the art, and the structures and principles of the components are known by those skilled in the art through technical manuals or conventional experimental methods, and are not described.
In the specific embodiment, before the unit is started, auxiliary steam is introduced into a reheater 3 system through a newly-added bypass valve 9 and a cold section reheater pipe 6, and is simultaneously shunted to a superheater 4 system through a high-pressure bypass, and the reheater 3 and the superheater 4 are pre-warmed to improve the temperature level thereof, so that the heating and boosting time after ignition of a boiler is reduced, and the air temperature can be increased, so that the purpose of powder feeding is achieved in advance; meanwhile, the reheater 3 is pressed to support the high-exhaust check valve 2 of the steam turbine, so that the problem that the warm-up effect is not affected due to the fact that the high-exhaust check valve 2 is not closed when the steam turbine is used for warming a large engine can be solved, the leakage amount of steam of the steam turbine warm-up from the high-exhaust check valve 2 is reduced, the warm-up effect of the steam turbine is improved, the starting time is effectively saved, and the cold-start fuel consumption of the unit is further reduced.
The basic principles and main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a steam heating furnace system is assisted to adjacent machine of unit cold state start-up, includes high back valve, re-heater, over heater and the female pipe of supplementary vapour, its characterized in that of arranging: the reheater is connected with a cold-section reheater pipe, a check valve and a cold-section-to-auxiliary steam regulating valve are connected in series on a pipeline between the cold-section reheater pipe and an auxiliary steam main pipe, the auxiliary steam main pipe is connected with cold-section reheated steam through a steam supply steam source pipeline, the cold-section-to-auxiliary steam regulating valve is arranged close to the reheater, the check valve is arranged close to the auxiliary steam main pipe, a bypass valve is arranged on a pipeline between the cold-section-to-auxiliary steam regulating valve and the auxiliary steam main pipe, and the bypass valve and the check valve are arranged in parallel;
the high-pressure bypass type steam turbine reheater is characterized in that a high-pressure exhaust check valve is installed on a pipeline between the reheater and the steam turbine, a high-pressure bypass pressure adjusting valve is arranged on a high-pressure bypass pipeline between the reheater and the superheater, the outlet end of the reheater is connected with a medium-pressure cylinder of the steam turbine through a pipeline, and the superheater is connected with a high-pressure cylinder of the steam turbine through a pipeline.
2. The system of claim 1, wherein the system comprises: the high-pressure bypass pipeline is a branch of a pipeline from a cold-section reheating pipe connected with the reheater to the high-discharge check valve, the high-pressure bypass pressure regulating valve is arranged on the branch, and the branch is respectively connected with the reheater and the superheater.
3. The system of claim 1, wherein the system comprises: the superheater comprises a secondary superheater, a platen superheater, a primary superheater, a ceiling superheater and a side packet superheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022136385.8U CN213298063U (en) | 2020-09-25 | 2020-09-25 | Unit cold-state starting adjacent machine auxiliary steam heating furnace system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022136385.8U CN213298063U (en) | 2020-09-25 | 2020-09-25 | Unit cold-state starting adjacent machine auxiliary steam heating furnace system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213298063U true CN213298063U (en) | 2021-05-28 |
Family
ID=76011299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022136385.8U Withdrawn - After Issue CN213298063U (en) | 2020-09-25 | 2020-09-25 | Unit cold-state starting adjacent machine auxiliary steam heating furnace system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213298063U (en) |
-
2020
- 2020-09-25 CN CN202022136385.8U patent/CN213298063U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220608 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 Huaneng Road, tianshenggang, Nantong, Jiangsu Province Patentee before: HUANENG POWER INTERNATIONAL Inc. NANTONG POWER PLANT |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210528 Effective date of abandoning: 20231218 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20210528 Effective date of abandoning: 20231218 |