CN220524093U - High drainage structure that adds of thermal power generating set - Google Patents
High drainage structure that adds of thermal power generating set Download PDFInfo
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- CN220524093U CN220524093U CN202320300508.8U CN202320300508U CN220524093U CN 220524093 U CN220524093 U CN 220524093U CN 202320300508 U CN202320300508 U CN 202320300508U CN 220524093 U CN220524093 U CN 220524093U
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- drainage
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 230000002209 hydrophobic effect Effects 0.000 claims description 11
- 239000005871 repellent Substances 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 description 10
- 239000003657 drainage water Substances 0.000 description 7
- 238000002955 isolation Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a high-pressure water-repellent structure of a thermal power generating unit, which comprises a #1 high pressure, a #2 high pressure, a #3 high pressure, a #4 high pressure and a deaerator, wherein the deaerator, the #4 high pressure, the #3 high pressure, the #2 high pressure and the #1 high pressure are sequentially connected, water led out of the deaerator is sequentially heated by the #4 high pressure, the #3 high pressure, the #2 high pressure and the #1 high pressure, a first water-repellent pipeline is arranged between the #1 high pressure and the #2 high pressure, a second water-repellent pipeline is arranged between the #2 high pressure and the #3 high pressure, a third water-repellent pipeline is arranged between the #3 high pressure and the #4 high pressure, a fourth water-repellent pipeline is arranged between the #4 high pressure and the deaerator, and a communicating pipe is arranged between the third water-repellent pipeline and the fourth water-repellent pipeline. The utility model aims to solve the problem that a large amount of high-temperature drain water is discharged to a condenser in the prior art.
Description
Technical Field
The utility model belongs to the technical field of thermal power plant equipment, and particularly relates to a high-pressure drainage structure of a thermal power generating unit.
Background
In order to reduce the loss of working medium, steam-side drainage of the surface heater of the thermal power generating unit is collected and collected in water supply. Although the hydrophobic step-by-step self-flow mode has poor heat economy, the system is simple and reliable, has small investment, does not need additional operation cost and has small maintenance workload, and therefore, is widely operated in high-pressure heating of the thermal power generating unit. In order to be matched with a power grid to consume new energy sources such as wind power, photovoltaic and the like, the thermal power generating unit must participate in deep peak shaving, so that the pressure difference between the #4 high-pressure heater and the deaerator becomes small, enough power cannot be provided for the water drainage of the step-by-step gravity flow, the problem that the water drainage is not smooth occurs in the #4 high-pressure heater, and the water is forced to be discharged to a condenser water drainage expansion container through a critical water drainage system. And a large amount of high-temperature water is discharged to the condenser, so that the electric power consumption of the condensate pump is increased, the unit is increased in cold source loss, and the economy of the unit is reduced. Through simulation calculation, if the twice-reheating million units are in 50% THA working condition, the #4 high-pressure water-adding drainage water is completely discharged to the condenser, and the twice-reheating million units are automatically flowed to the deaerator working condition step by step more normally, and the heat consumption rate of the units is increased by 104kJ/kWh.
Disclosure of Invention
Aiming at the technical problems, the utility model discloses a high-pressure drainage structure of a thermal power generating unit, which aims to solve the problem that a large amount of high-temperature drainage is discharged to a condenser in the prior art, and designs the high-pressure drainage structure of the thermal power generating unit.
The utility model provides a high-pressure water-repellent structure of a thermal power generating unit, which comprises a #1 high pressure, a #2 high pressure, a #3 high pressure, a #4 high pressure and a deaerator, wherein the deaerator, the #4 high pressure, the #3 high pressure, the #2 high pressure and the #1 high pressure are sequentially connected, water led out of the deaerator is sequentially heated by the #4 high pressure, the #3 high pressure, the #2 high pressure and the #1 high pressure, a first water-repellent pipeline is arranged between the #1 high pressure and the #2 high pressure, a second water-repellent pipeline is arranged between the #2 high pressure and the #3 high pressure, a third water-repellent pipeline is arranged between the #3 high pressure and the #4 high pressure, a fourth water-repellent pipeline is arranged between the #4 high pressure and the deaerator, and a communicating pipe is arranged between the third water-repellent pipeline and the fourth water-repellent pipeline.
Further, a gate valve 9 and a regulating valve 10 are provided on the communicating pipe.
Further, the third hydrophobic pipeline is provided with a first valve 1, a second valve 2 and a third valve 3.
Further, a ninth valve 14, a seventh valve 7 and an eighth valve 8 are arranged on the fourth hydrophobic pipeline.
Further, still include condenser drainage expansion vessel, #4 height adds and is provided with critical drainage pipe, critical drainage pipe connect to condenser drainage expansion vessel, be provided with fourth valve 4, fifth valve 5 and sixth valve 6 on the critical drainage pipe.
According to the high-pressure drainage structure of the thermal power generating unit, the communicating pipe is arranged between the third drainage pipeline and the fourth drainage pipeline, and the communicating pipe has the function of automatically flowing the #3 high-pressure drainage to the deaerator when the thermal power generating unit is put into operation under the deep regulation working condition of the unit, so that the #4 high-pressure drainage system is prevented from being discharged to the condenser, and the cold source loss caused by unsmooth #4 high-pressure drainage is reduced.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a high-pressure drainage structure of a thermal power generating unit.
Detailed Description
The utility model discloses a high-pressure drainage structure of a thermal power generating unit.
The following description of the present utility model will be made more fully hereinafter with reference to the accompanying drawings, in which it is shown, however, some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the utility model provides a high-pressure water-removing structure of a thermal power generating unit, which comprises a #1 high pressure, a #2 high pressure, a #3 high pressure, a #4 high pressure and a deaerator, wherein the deaerator, the #4 high pressure, the #3 high pressure, the #2 high pressure and the #1 high pressure are sequentially connected, water led out of the deaerator is sequentially heated by the #4 high pressure, the #3 high pressure, the #2 high pressure and the #1 high pressure, a first water-removing pipeline is arranged between the #1 high pressure and the #2 high pressure, a second water-removing pipeline is arranged between the #2 high pressure and the #3 high pressure, a third water-removing pipeline is arranged between the #3 high pressure and the #4 high pressure, a fourth water-removing pipeline is arranged between the #4 high pressure and the deaerator, and a communicating pipe is arranged between the third water-removing pipeline and the fourth water-removing pipeline.
The communicating pipe has the function of automatically flowing the high-pressure drainage water of the #3 to the deaerator when the machine set is put into operation under the deep regulating working condition, so that the high-pressure drainage water of the #4 is prevented from being discharged to the condenser through the high-pressure critical drainage system, and the cold source loss caused by unsmooth drainage of the #4 is reduced.
The communicating pipe is provided with a gate valve 9 and a regulating valve 10.
The third hydrophobic pipeline is provided with a first valve 1, a second valve 2 and a third valve 3.
The fourth hydrophobic pipeline is provided with a ninth valve 14, a seventh valve 7 and an eighth valve 8.
The high drainage structure that adds of thermal power generating unit still includes condenser drainage expansion vessel, #4 is high to be provided with critical drainage pipe, critical drainage pipe is connected to condenser drainage expansion vessel, be provided with fourth valve 4, fifth valve 5 and sixth valve 6 on the critical drainage pipe.
Specifically, the first valve 1 and the third valve 3 mainly close and isolate the high steam adding side of the cut-off #3 and the medium flow of the high steam adding side of the cut-off #4 and the second valve 2. The second valve 2 is used for adjusting and controlling the high-adding operation liquid level of the #3 so as to ensure that the high-adding lower end difference of the #3 is within a design value range. When the unit normally operates, the first valve 1 and the third valve 3 are opened; when the second valve 2 needs to be overhauled, the first valve 1 and the second valve 2 need to be closed. When the utility model is working normally, i.e. the eighth valve 8, the gate valve 9 and the regulating valve 10 are open, the second valve 2 is normally closed. The second valve 2 is an important operating valve connecting the piping between the #3 high-charge side and the #4 high-charge side.
The fourth valve 4 and the sixth valve 6 are mainly used for closing the medium circulation of the isolation cut-off #4 high steam adding side, the condenser drain expansion tank and the fifth valve 5. The fifth valve 5 is used for adjusting and controlling the high-pressure operation liquid level of the #4 under the accident working condition so as to ensure that the #4 is not full of water and the safety of the steam turbine is threatened. When the unit normally operates, the fourth valve 4 and the sixth valve 6 are opened; when the fifth valve 5 needs to be overhauled, the fourth valve 4 and the sixth valve 6 need to be closed. When the utility model works normally, namely the eighth valve 8, the gate valve 9 and the regulating valve 10 are opened, the fifth valve 5 is opened, and the high liquid filling level control of #4 is participated. The fifth valve 5 is an important operation valve of a pipeline between the #4 high-steam-adding side and the condenser drain expander.
The eighth valve 8 and the ninth valve 14 mainly close the high steam adding side of the isolation cut #4 and medium circulation of the deaerator and the seventh valve 7. The seventh valve 7 is used for adjusting the high-adding operation liquid level of the control #4 to ensure that the high-adding lower end difference of the control #4 is within the designed value range. When the unit is operating normally, the eighth valve 8, 14 is open; when the seventh valve 7 needs to be overhauled, the eighth valve 8 and the ninth valve 14 need to be closed. When the utility model is working normally, i.e. the fourth valve 4, the fifth valve 5, the sixth valve 6, the eighth valve 8, the gate valve 9, the regulating valve 10 are open and the seventh valve 7 is normally closed. The seventh valve 7 is an important operating valve for the pipeline between the #4 high-steam-adding side and the deaerator.
The gate valve 9 mainly closes the medium flow between the high-pressure side of the isolation cut #3 and the regulating valve 10. The function of the regulating valve 10 is to regulate and control the high-added running liquid level of the #3 under the deep regulating working condition so as to ensure that the high-added lower end difference of the #3 is within the designed value range. When the unit is operating normally, the gate valve 9 is open; when the regulating valve 10 needs to be overhauled, the eighth valve 8 and the gate valve 9 need to be closed. When the utility model works normally, the opening of the regulating valve 10 is automatically regulated according to the height of the #3 high-pressure liquid level. The regulating valve 10 is an important operating valve of the pipeline between the #3 high-steam-adding side and the deaerator.
The communicating pipe 11 has the function of automatically flowing the high-pressure drainage water of the #3 to the deaerator when the machine set is put into operation under the deep regulating working condition, so that the high-pressure drainage water of the #4 is prevented from being discharged to the condenser through the high-pressure critical drainage system, and the cold source loss caused by unsmooth drainage of the #4 is reduced.
The pipeline 12 has the function of automatically flowing the #4 high-pressure drainage water to the deaerator step by step during normal operation of the unit, and recovering working medium and heat thereof.
The pipeline 13 has the function of automatically flowing the #3 high-pressure drainage water to the deaerator step by step during normal operation of the unit, and recovering working medium and heat thereof.
The operation process comprises the following steps:
when the unit starts to carry out deep peak regulation and load reduction according to the power grid dispatching instruction, confirming: the fourth valve 4, the sixth valve 6 and the gate valve 9 are all open. And the regulating valve 10 is slowly opened, the second valve 2 is closed, the high liquid level of the #3 is regulated and controlled through the regulating valve 10, the liquid level is ensured not to obviously fluctuate, and the lower end difference is within a design value. And the fifth valve 5 is slowly opened, the seventh valve 7 is closed, the high-pressure liquid level of #4 is regulated and controlled through the fifth valve 5, the liquid level is ensured not to obviously fluctuate, and the lower end difference is within a design value. At this time, the high-added drain water of #3 automatically flows to the deaerator through the communicating pipe 11, so that only a small amount of the high-added drain water of #4 is discharged to the condenser drain expansion tank through the critical drain system, and the cold source loss is reduced.
When the unit load is increased to #4 high-pressure drainage and the unit load can automatically flow to the deaerator step by step, the valve is reversely operated, and the normal operation state can be restored.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (5)
1. The utility model provides a high hydrophobic structure that adds of thermal power generating unit, its characterized in that, including #1 highly add, #2 highly add, #3 highly add, #4 highly add and the deaerator, the deaerator #4 highly add #3 highly add #2 highly add with #1 highly add and connect gradually, by #4 highly add #3 highly add #2 highly add with #1 highly add in proper order heat the water that the deaerator was derived, #1 highly add with #2 highly add and be provided with first hydrophobic pipeline between the high add of #2, #2 highly add with #3 highly add and be provided with the second hydrophobic pipeline between the high add of #3, #3 highly add with #4 highly add and be provided with the third hydrophobic pipeline between the high add of #4, #4 highly add with be provided with communicating pipe between the deaerator, the third hydrophobic pipeline with be provided with between the fourth hydrophobic pipeline.
2. The high-pressure drainage structure of the thermal power generating unit according to claim 1, wherein a gate valve (9) and a regulating valve (10) are arranged on the communicating pipe.
3. The high-pressure drainage structure of the thermal power generating unit according to claim 1, wherein the third drainage pipeline is provided with a first valve (1), a second valve (2) and a third valve (3).
4. The high-pressure drainage structure of the thermal power generating unit according to claim 1, wherein a ninth valve (14), a seventh valve (7) and an eighth valve (8) are arranged on the fourth drainage pipeline.
5. The high-pressure drainage structure of a thermal power generating unit according to claim 1, further comprising a condenser drainage expansion vessel, wherein the #4 high-pressure drainage vessel is provided with a critical drainage pipe, the critical drainage pipe is connected to the condenser drainage expansion vessel, and the critical drainage pipe is provided with a fourth valve (4), a fifth valve (5) and a sixth valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320300508.8U CN220524093U (en) | 2023-02-22 | 2023-02-22 | High drainage structure that adds of thermal power generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320300508.8U CN220524093U (en) | 2023-02-22 | 2023-02-22 | High drainage structure that adds of thermal power generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220524093U true CN220524093U (en) | 2024-02-23 |
Family
ID=89931588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320300508.8U Active CN220524093U (en) | 2023-02-22 | 2023-02-22 | High drainage structure that adds of thermal power generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220524093U (en) |
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2023
- 2023-02-22 CN CN202320300508.8U patent/CN220524093U/en active Active
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