CN113899223A - Winter anti-freezing device and method of indirect air cooling system participating in waste heat recovery - Google Patents
Winter anti-freezing device and method of indirect air cooling system participating in waste heat recovery Download PDFInfo
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- CN113899223A CN113899223A CN202111356132.4A CN202111356132A CN113899223A CN 113899223 A CN113899223 A CN 113899223A CN 202111356132 A CN202111356132 A CN 202111356132A CN 113899223 A CN113899223 A CN 113899223A
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- 238000001816 cooling Methods 0.000 title claims abstract description 142
- 239000002918 waste heat Substances 0.000 title claims abstract description 22
- 238000007710 freezing Methods 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 115
- 239000000498 cooling water Substances 0.000 claims abstract description 54
- 230000008014 freezing Effects 0.000 claims abstract description 4
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000002528 anti-freeze Effects 0.000 claims 5
- 230000002265 prevention Effects 0.000 claims 1
- 230000001502 supplementing effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/005—Auxiliary systems, arrangements, or devices for protection against freezing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
A winter anti-freezing device and method of an indirect air cooling system participating in waste heat recovery comprises an indirect cooling water inlet main pipe and an indirect cooling water outlet main pipe, wherein unit cooling water enters the indirect cooling system through the indirect cooling water inlet main pipe, and enters unit heat exchange equipment through the indirect cooling water outlet main pipe after being cooled; an intercooling system water inlet valve is arranged on the intercooling water inlet main pipe, and an intercooling system water outlet valve is arranged on the intercooling water outlet main pipe; an interface is arranged on an indirect cooling water inlet main pipe in front of an indirect cooling system water inlet valve and connected to an inlet of a heat pump system, and an interface is arranged on an indirect cooling water outlet main pipe behind an indirect cooling system water outlet valve and connected to an outlet of the heat pump system; the multi-path pipeline is arranged between the intercooling water inlet main pipe and the intercooling water outlet main pipe, a cooling sector and a circulating pump are arranged on the pipeline, and the cooling sector pipeline and the circulating pump pipeline are arranged in parallel. The invention can establish a circulation path in the indirect cooling system when the heat pump system runs at full load in winter, thereby not only avoiding the damage of equipment caused by freezing, but also ensuring the safe operation of the unit when the heat pump system is stopped by accident.
Description
Technical Field
The invention belongs to the technical field of safe operation of power plants, and particularly relates to a winter anti-freezing device and method of an indirect air cooling system participating in waste heat recovery.
Background
In northern areas of China, due to the shortage of water resources, the Hamon type indirect air cooling system becomes a main choice for exhaust steam cooling and auxiliary engine cooling of a steam turbine of a large-scale thermal power plant. The indirect cooling system adopts closed circulation, so that the consumption of water resources is reduced, but the heat exchange effect has natural disadvantage compared with a wet cooling system, the temperature of circulating water of the system is higher, and a large amount of heat is brought into the air environment in the indirect cooling tower.
In recent years, the absorption heat pump for recovering the waste heat of cooling water of a power plant becomes an important development direction in the field of energy conservation of the power plant, and is applied to circulating water, open water and closed water systems of a plurality of power plants. By arranging the absorption heat pump system which operates in parallel with the indirect cooling system, cooling water is switched to the heat pump system when the unit operates, and a low-grade heat source is extracted and used for unit heating, condensed water heating and the like. When the cooling system works at full load, cooling water is completely switched to the heat pump system, water stored in the indirect cooling system has no through-flow path, and the cooling system is easy to freeze in working in winter and damages cooling fins. If the water stored in the tower is discharged, the water cannot be quickly switched back to the indirect cooling system to work when the heat pump system fails, and the unit stops.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a winter anti-freezing device and a winter anti-freezing method for an indirect air cooling system participating in waste heat recovery.
In order to achieve the purpose, the invention adopts the technical scheme that:
a winter anti-freezing device of an indirect air cooling system participating in waste heat recovery comprises an intercooling water inlet main pipe 19 and an intercooling water outlet main pipe 20, unit cooling water enters the intercooling system through the intercooling water inlet main pipe 19, and enters unit heat exchange equipment through the intercooling water outlet main pipe 20 after being cooled;
an intercooling system water inlet valve 1 is arranged on the intercooling water inlet main pipe 19, and an intercooling system water outlet valve 2 is arranged on the intercooling water outlet main pipe 20;
an interface is arranged on an indirect cooling water inlet main pipe 19 in front of an indirect cooling system water inlet valve 1 and connected to an inlet of a heat pump system 3, an interface is arranged on an indirect cooling water outlet main pipe 20 behind an indirect cooling system water outlet valve 2 and connected to an outlet of the heat pump system 3, and the heat pump system 3 is used for recovering the waste heat of high-temperature cooling water of a power plant;
and a plurality of pipelines are connected between the indirect cooling water inlet main pipe 19 and the indirect cooling water outlet main pipe 20, wherein a cooling sector is arranged on one part of pipelines, and a circulating pump is arranged on the other part of pipelines.
The intercooling water inlet header pipe 19 is divided into four paths behind the intercooling system water inlet valve 1, the first path is communicated with the inlet of the first cooling sector 13, and the outlet of the first cooling sector 13 is communicated with the intercooling water outlet header pipe 20;
the second path is communicated with the inlet of a second cooling sector 14, and the outlet of the second cooling sector 14 is communicated with an intercooling outlet header pipe 20;
the third path is communicated with the intercooling water outlet main pipe 20 after being sequentially connected with a first circulating pump outlet door 8, a first check door 7, a first circulating pump 6 and a first circulating pump inlet door 5;
and the fourth path is communicated with an indirect cooling water outlet main pipe 20 after being sequentially connected with a second circulating pump outlet door 12, a second check valve 11, a second circulating pump 10 and a second circulating pump inlet door 9.
And a water replenishing valve 4 is arranged on the indirect cooling water outlet main pipe 20 and is arranged in parallel with the water outlet valve 2 of the indirect cooling system.
A first stop valve 15 is arranged on a connecting pipeline of the indirect cooling water inlet main pipe 19 and the first cooling sector 13, and a second stop valve 16 is arranged on a connecting pipeline of the first cooling sector 13 and the indirect cooling water outlet main pipe 20.
And a third stop valve 17 is arranged on a connecting pipeline of the indirect cooling water inlet main pipe 19 and the first cooling sector 14, and a fourth stop valve 18 is arranged on a connecting pipeline of the first cooling sector 14 and the indirect cooling water outlet main pipe 20.
The water inlet valve 1 of the indirect cooling system, the water outlet valve 2 of the indirect cooling system, the inlet door 5 of the first circulating pump, the outlet door 8 of the first circulating pump, the inlet door 9 of the second circulating pump and the outlet door 12 of the first circulating pump are all electric valves, the executing mechanism is an electric motor, and the water supplementing valve 4 is a pneumatic valve.
A pressure measuring point P21 is arranged on the indirect cooling tower water inlet main pipe 19, and a temperature measuring point T22 is arranged on the indirect cooling tower water outlet main pipe 20.
At least two sets of said cooling sectors.
The use method of the winter anti-freezing device of the indirect air cooling system participating in waste heat recovery comprises the following steps;
in the process of increasing the load of the heat pump system 3, the water inlet valve 1 of the indirect cooling system and the water outlet valve 2 of the indirect cooling system are gradually closed until all the cooling water of the unit is switched to the heat pump system 3, and the anti-freezing device operates according to the following sequence:
1) after the water inlet valve 1 of the indirect cooling system and the water outlet valve 2 of the indirect cooling system are completely closed, the indirect cooling system constructs an internal circulation passage, the third stop valve 17 and the fourth stop valve 18 are closed, the first stop valve 15 and the second stop valve 16 are opened, and the first circulating pump inlet door 5 and the second circulating pump inlet door 9 are opened;
2) starting a first circulating pump 6, starting a first circulating pump outlet door 8, starting internal circulation of an indirect cooling system, starting a second circulating pump outlet door 12, enabling a second circulating pump 10 to enter a standby state as a standby pump, and starting the first circulating pump 6 in an interlocking manner after the first circulating pump is stopped in an accident;
3) the pressure measuring point P measures the pressure of the indirect cooling water inlet main pipe 19 and is opened when the pressure dropsThe water supply valve 4 is opened to supply pressure to the system and maintain PMeasuring＝PCold0.05MPa, wherein PMeasuringFor the pressure measurement point P, the current measurement value PColdThe measured value of a pressure measuring point P before the water inlet valve 1 of the indirect cooling system and the water outlet valve 2 of the indirect cooling system are completely closed;
4) measuring the temperature of the indirect cooling water outlet main pipe 20 at a temperature measuring point T, wherein the set range is 35-50 ℃, the circulating pump drives the internal circulation to rise until the water temperature rises, and when the temperature rises above the set value, the temperature of the measuring point is adjusted to the set value through the first cooling sector 13;
when the heat pump system is in a load reduction or accident shutdown state, the water inlet valve 1 of the indirect cooling system and the water outlet valve 2 of the indirect cooling system can be directly interlocked to open, the circulating pump stops running, the third stop valve 17 and the fourth stop valve 18 are opened, and the indirect cooling system is rapidly recovered to a commissioning state.
The invention has the beneficial effects that:
when the heat pump system works specifically, the circulating pump group is arranged to establish an internal circulating passage of the indirect cooling system when the load of the heat pump system rises and the indirect cooling system quits running, so that the water stored in the system keeps fluidity, the water pressure and the temperature can be accurately controlled, the cooling water can be prevented from freezing to damage indirect cooling equipment, the indirect cooling system can be quickly put into the indirect cooling system when the heat pump system is shut down by accident, and the safe running of a unit is ensured.
The invention adds an internal circulation passage of the indirect cooling system, can accurately control the internal circulation pressure and temperature, effectively prevents the unit from stopping due to the damage of indirect cooling equipment or the failure of a heat pump system caused by the freezing in winter, and can be used for newly building a unit and also can be used for reconstructing the existing unit.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is an indirect cooling system water inlet valve, 2 is an indirect cooling system water outlet valve, 3 is a heat pump system, 4 is a water supplementing valve, 5 is a first circulating pump inlet door, 6 is a first circulating pump, 7 is a first check valve, 8 is a first circulating pump outlet door, 9 is a second circulating pump inlet door, 10 is a second circulating pump, 11 is a second check valve, 12 is a second circulating pump outlet door, 13 is a first cooling sector, 14 is a second cooling sector, 15 is a first check valve, 16 is a second check valve, 17 is a third check valve, 18 is a fourth check valve, 19 is an indirect cooling water inlet main pipe, 20 is an indirect cooling water outlet main pipe, 21 is a pressure measuring point, and 22 is a temperature measuring point.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the indirect air cooling system anti-freezing device participating in waste heat recovery in winter according to the present invention includes an indirect cooling system water inlet valve 1, an indirect cooling system water outlet valve 2, a heat pump system 3, a water supply valve 4, a first circulation pump 6, a second circulation pump 10, an indirect cooling water inlet header pipe 19, an indirect cooling water outlet header pipe 20, a first cooling sector 13, and a second cooling sector 14; the unit cooling water enters the indirect cooling system through the indirect cooling water inlet main pipe 19 and enters the unit heat exchange equipment through the indirect cooling water outlet main pipe 20 after being cooled. An intercooling system water inlet valve 1 is arranged on the intercooling water inlet main pipe 19. An indirect cooling system water outlet valve 2 is arranged on the indirect cooling water outlet main pipe 20; the intercooling water inlet main pipe 19 is divided into four paths behind the intercooling system water inlet valve 1, the first path is communicated with the inlet of the first cooling sector 13, and the outlet of the first cooling sector 13 is communicated with the intercooling water outlet main pipe 20; the second path is communicated with the inlet of a second cooling sector 14, and the outlet of the second cooling sector 14 is communicated with an intercooling outlet header pipe 20; the third path is communicated with the intercooling water outlet main pipe 20 after being sequentially connected with a first circulating pump outlet door 8, a first check door 7, a first circulating pump 6 and a first circulating pump inlet door 5; and the fourth path is communicated with an indirect cooling water outlet main pipe 20 after being sequentially connected with a second circulating pump outlet door 12, a second check valve 11, a second circulating pump 10 and a second circulating pump inlet door 9.
An interface is arranged on an indirect cooling water inlet main pipe 19 in front of an indirect cooling system water inlet valve 1 and connected to an inlet of a heat pump system 3, and an interface is arranged on an indirect cooling water outlet main pipe 20 behind an indirect cooling system water outlet valve 2 and connected to an outlet of the heat pump system 3; a water replenishing valve 4 is arranged on the indirect cooling water outlet main pipe 20 and is arranged in parallel with the water outlet valve 2 of the indirect cooling system; a first stop valve 15 is arranged on a connecting pipeline of the indirect cooling water inlet main pipe 19 and the first cooling sector 13, and a second stop valve 16 is arranged on a connecting pipeline of the first cooling sector 13 and the indirect cooling water outlet main pipe 20; a third stop valve 17 is provided in a connecting pipe between the intercooling inlet header pipe 19 and the first cooling sector 14, and a fourth stop valve 18 is provided in a connecting pipe between the first cooling sector 14 and the intercooling outlet header pipe 20.
The water inlet valve 1 of the indirect cooling system, the water outlet valve 2 of the indirect cooling system, the inlet door 5 of the first circulating pump, the outlet door 8 of the first circulating pump, the inlet door 9 of the second circulating pump and the outlet door 12 of the first circulating pump are all electric valves, the actuating mechanism is an electric motor, and the water supplementing valve 4 is a pneumatic valve; a pressure measuring point P21 is arranged on the indirect cooling tower water inlet main pipe 19, and a temperature measuring point T22 is arranged on the indirect cooling tower water outlet main pipe 20; the number of cooling sectors is only exemplified by two groups, and the actual number includes, but is not limited to, two groups.
The winter anti-freezing method of the indirect air cooling system participating in waste heat recovery comprises the following steps:
in the process of increasing the load of the heat pump system 3, the water inlet valve 1 of the indirect cooling system and the water outlet valve 2 of the indirect cooling system are gradually closed until all the cooling water of the unit is switched to the heat pump system 3. The freeze protection device operates in the following order:
1) after the water inlet valve 1 of the indirect cooling system and the water outlet valve 2 of the indirect cooling system are completely closed, the indirect cooling system constructs an internal circulation passage, the third stop valve 17 and the fourth stop valve 18 are closed, the first stop valve 15 and the second stop valve 16 are opened, and the first circulating pump inlet door 5 and the second circulating pump inlet door 9 are opened.
2) The first circulating pump 6 is started, the outlet door 8 of the first circulating pump is opened, and the indirect cooling system starts internal circulation. And (3) opening an outlet door 12 of the second circulating pump, enabling the second circulating pump 10 to enter a standby state as a standby pump, and starting in an interlocking manner after the first circulating pump 6 is shut down in an accident.
3) The pressure of the cold water inlet main pipe 19 is measured by a pressure measuring point P, when the pressure is reduced, the water replenishing valve 4 is opened to replenish the pressure of the system, and the pressure P is maintainedMeasuring＝PCold0.05MPa, wherein PMeasuringFor the pressure measurement point P, the current measurement value PColdThe measured value of the pressure measuring point P before the water inlet valve 1 of the indirect cooling system and the water outlet valve 2 of the indirect cooling system are completely closed.
4) And measuring the temperature of the indirect cooling water outlet main pipe 20 at the temperature measuring point T, wherein the set range is 35-50 ℃, the circulating pump drives the internal circulation to rise until the water temperature rises, and when the temperature rises above the set value, the temperature of the measuring point is adjusted to the set value through the first cooling sector 13.
When the heat pump system is in a load reduction or accident shutdown state, the water inlet valve 1 of the indirect cooling system and the water outlet valve 2 of the indirect cooling system can be directly interlocked to open, the circulating pump stops running, the third stop valve 17 and the fourth stop valve 18 are opened, and the indirect cooling system is rapidly recovered to a commissioning state.
Claims (9)
1. The winter anti-freezing device of the indirect air cooling system participating in waste heat recovery is characterized by comprising an intercooling water inlet main pipe (19) and an intercooling water outlet main pipe (20), wherein unit cooling water enters the intercooling system through the intercooling water inlet main pipe (19) and enters unit heat exchange equipment through the intercooling water outlet main pipe (20) after being cooled;
an indirect cooling system water inlet valve (1) is arranged on the indirect cooling water inlet main pipe (19), and an indirect cooling system water outlet valve (2) is arranged on the indirect cooling water outlet main pipe (20);
an interface is arranged on an indirect cooling water inlet main pipe (19) in front of an indirect cooling system water inlet valve (1) and connected to an inlet of a heat pump system (3), an interface is arranged on an indirect cooling water outlet main pipe (20) behind an indirect cooling system water outlet valve (2) and connected to an outlet of the heat pump system (3), and the heat pump system (3) is used for recovering the waste heat of high-temperature cooling water of a power plant;
and a plurality of pipelines are arranged between the indirect cooling water inlet main pipe (19) and the indirect cooling water outlet main pipe (20), a cooling sector and a circulating pump are arranged on the pipelines, and the cooling sector pipeline and the circulating pump pipeline are arranged in parallel.
2. The indirect air cooling system anti-freezing device in winter with waste heat recovery of claim 1, wherein the indirect cooling water outlet main pipe (20) is provided with a water replenishing valve (4) which is arranged in parallel with the indirect cooling system water outlet valve (2).
3. The indirect air cooling system anti-freezing device in winter with waste heat recovery as claimed in claim 1, wherein the intercooling water inlet header pipe (19) is divided into four paths behind the intercooling system water inlet valve (1), the first path is communicated with the inlet of the first cooling sector (13), and the outlet of the first cooling sector (13) is communicated with the intercooling water outlet header pipe (20);
the second path is communicated with an inlet of a second cooling sector (14), and an outlet of the second cooling sector (14) is communicated with an indirect cooling water outlet header pipe (20);
the third path is communicated with an intercooling water outlet main pipe (20) after being sequentially connected with a first circulating pump outlet door (8), a first check door (7), a first circulating pump (6) and a first circulating pump inlet door (5);
and the fourth path is communicated with the intercooling water outlet main pipe (20) after being sequentially connected with a second circulating pump outlet door (12), a second check door (11), a second circulating pump (10) and a second circulating pump inlet door (9).
4. A winter antifreeze apparatus for indirect air cooling system with waste heat recovery as set forth in claim 3, characterized in that the first stop valve (15) is set on the connecting pipeline of the intercooling inlet header pipe (19) and the first cooling sector (13), and the second stop valve (16) is set on the connecting pipeline of the first cooling sector (13) and the intercooling outlet header pipe (20).
5. A winter antifreeze apparatus for indirect air cooling system with waste heat recovery as set forth in claim 3, characterized in that the connecting pipeline of the intercooling water inlet header pipe (19) and the first cooling sector (14) is provided with a third stop valve (17), and the connecting pipeline of the first cooling sector (14) and the intercooling water outlet header pipe (20) is provided with a fourth stop valve (18).
6. The indirect air cooling system anti-freezing device participating in waste heat recovery in winter as claimed in claim 3, wherein the water inlet valve (1) of the indirect cooling system, the water outlet valve (2) of the indirect cooling system, the inlet door (5) of the first circulating pump, the outlet door (8) of the first circulating pump, the inlet door (9) of the second circulating pump and the outlet door (12) of the first circulating pump are all electric valves, the actuator is an electric motor, and the water replenishing valve (4) is a pneumatic valve.
7. The indirect air cooling system antifreeze apparatus with waste heat recovery of claim 1, wherein the indirect air cooling system antifreeze apparatus with waste heat recovery is characterized in that the indirect air cooling system inlet header pipe (19) is provided with a pressure measuring point P (21), and the indirect air cooling system outlet header pipe (20) is provided with a temperature measuring point T (22).
8. The indirect air cooling system antifreeze apparatus with waste heat recovery of claim 1, wherein said cooling sectors are provided in at least two groups.
9. The use method of the indirect air cooling system winter freezing prevention device participating in waste heat recovery according to any one of claims 1 to 8 is characterized by comprising the following steps;
in the process of increasing the load of the heat pump system (3), the water inlet valve (1) of the indirect cooling system and the water outlet valve (2) of the indirect cooling system are gradually closed until all the cooling water of the unit is switched to the heat pump system (3), and the anti-freezing device operates according to the following sequence:
1) after the water inlet valve (1) and the water outlet valve (2) of the indirect cooling system are completely closed, the indirect cooling system constructs an internal circulation passage, a third stop valve (17) and a fourth stop valve (18) are closed, a first stop valve (15) and a second stop valve (16) are opened, and a first circulating pump inlet door (5) and a second circulating pump inlet door (9) are opened;
2) starting a first circulating pump (6), starting a first circulating pump outlet door (8), starting an indirect cooling system to perform internal circulation, starting a second circulating pump outlet door (12), enabling a second circulating pump (10) to enter a standby state as a standby pump, and starting the first circulating pump (6) in an interlocking manner after the first circulating pump is shut down in an accident;
3) the pressure of the cold water inlet main pipe (19) is measured by a pressure measuring point P, and when the pressure is reduced, the water replenishing valve (4) is opened to replenish the pressure of the system and maintain the pressure PMeasuring＝PCold0.05MPa, wherein PMeasuringFor the pressure measurement point P, the current measurement value PColdThe measured value of a pressure measuring point P before the water inlet valve (1) of the indirect cooling system and the water outlet valve (2) of the indirect cooling system are completely closed;
4) measuring the temperature of the indirect cooling water outlet main pipe (20) at a temperature measuring point T, wherein the set range is 35-50 ℃, the circulating pump drives the internal circulation to rise until the water temperature rises, and when the temperature rises above the set value, the temperature of the measuring point is adjusted to the set value through the first cooling sector (13);
when the heat pump system is in a load reduction or accident shutdown state, the water inlet valve (1) of the indirect cooling system and the water outlet valve (2) of the indirect cooling system can be directly interlocked to open, the circulating pump stops running, the third stop valve (17) and the fourth stop valve (18) are opened, and the indirect cooling system is rapidly recovered to a commissioning state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111356132.4A CN113899223B (en) | 2021-11-16 | 2021-11-16 | Winterization device and method of indirect air cooling system participating in waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111356132.4A CN113899223B (en) | 2021-11-16 | 2021-11-16 | Winterization device and method of indirect air cooling system participating in waste heat recovery |
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| Publication Number | Publication Date |
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| CN113899223A true CN113899223A (en) | 2022-01-07 |
| CN113899223B CN113899223B (en) | 2024-07-09 |
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| CN202111356132.4A Active CN113899223B (en) | 2021-11-16 | 2021-11-16 | Winterization device and method of indirect air cooling system participating in waste heat recovery |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906997A (en) * | 2010-07-05 | 2010-12-08 | 双良节能系统股份有限公司 | Condensation heat recovery central heating system of power plant indirect air cooling machine set |
| KR101145978B1 (en) * | 2010-11-24 | 2012-05-16 | 주식회사 귀뚜라미 범양냉방 | Heat pump type air conditioning system using waste heat |
| CN103034221A (en) * | 2012-12-28 | 2013-04-10 | 北京华景天润科技有限公司 | Thermal power plant circulating water system |
| CN111854462A (en) * | 2020-08-03 | 2020-10-30 | 西安热工研究院有限公司 | Full-working-condition cooling and anti-freezing system suitable for indirect air cooling heat supply unit |
| CN112577089A (en) * | 2020-12-28 | 2021-03-30 | 西安热工研究院有限公司 | Circulating water winter starting anti-freezing system and operation method |
| CN216845739U (en) * | 2021-11-16 | 2022-06-28 | 西安热工研究院有限公司 | Indirect air cooling system anti-freezing device in winter participating in waste heat recovery |
-
2021
- 2021-11-16 CN CN202111356132.4A patent/CN113899223B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906997A (en) * | 2010-07-05 | 2010-12-08 | 双良节能系统股份有限公司 | Condensation heat recovery central heating system of power plant indirect air cooling machine set |
| KR101145978B1 (en) * | 2010-11-24 | 2012-05-16 | 주식회사 귀뚜라미 범양냉방 | Heat pump type air conditioning system using waste heat |
| CN103034221A (en) * | 2012-12-28 | 2013-04-10 | 北京华景天润科技有限公司 | Thermal power plant circulating water system |
| CN111854462A (en) * | 2020-08-03 | 2020-10-30 | 西安热工研究院有限公司 | Full-working-condition cooling and anti-freezing system suitable for indirect air cooling heat supply unit |
| CN112577089A (en) * | 2020-12-28 | 2021-03-30 | 西安热工研究院有限公司 | Circulating water winter starting anti-freezing system and operation method |
| CN216845739U (en) * | 2021-11-16 | 2022-06-28 | 西安热工研究院有限公司 | Indirect air cooling system anti-freezing device in winter participating in waste heat recovery |
Non-Patent Citations (1)
| Title |
|---|
| 高奎等: "国产间接空冷系统控制策略及应用", 电力建设, no. 02, 1 February 2014 (2014-02-01), pages 101 - 107 * |
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| CN113899223B (en) | 2024-07-09 |
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