CN113217905A - System for optimizing industrial steam supply and temperature reduction water source and working method - Google Patents
System for optimizing industrial steam supply and temperature reduction water source and working method Download PDFInfo
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- CN113217905A CN113217905A CN202110616561.4A CN202110616561A CN113217905A CN 113217905 A CN113217905 A CN 113217905A CN 202110616561 A CN202110616561 A CN 202110616561A CN 113217905 A CN113217905 A CN 113217905A
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- Prior art keywords
- water
- stop valve
- pipeline
- steam supply
- temperature
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
Abstract
The invention discloses a system and a working method for optimizing an industrial steam supply and temperature reduction water source. The pressure of condensed water at the outlet of the condensed water pump is far lower than the pressure of water supply, so that the operation safety and reliability are greatly improved; meanwhile, a bypass and a standby bypass are arranged beside the temperature reduction water pipeline, the regulation capability of the steam temperature is guaranteed, and the regulation precision is improved. The invention has the advantages of small transformation range, low investment cost and high operation reliability, and is beneficial to further popularization and application.
Description
Technical Field
The invention belongs to the field of cogeneration of heat and power for a coal-fired generator set, and particularly relates to a system for optimizing an industrial steam supply and temperature reduction water source and a working method.
Background
The large coal-fired thermal power generating unit is technically improved to bear industrial steam supply, and the position of a steam extraction port is determined according to the requirements of steam-using enterprises and steam-using parameters. When steam is actually supplied, the pressure and the temperature of steam at the position of a steam extraction opening are higher than those of steam required by a steam user, and a pressure reducing valve and a desuperheater are required to be installed on a steam supply pipeline. At present, the industrial steam supply temperature reduction device mostly adopts a technical route of water spraying temperature reduction, namely, part of high-pressure water supply is led out from an outlet of a water supply pump to an industrial steam supply pipeline to spray water for temperature reduction of steam. Because the outlet of the water supply pump supplies water as the highest-pressure working medium in the whole thermodynamic system of the unit, the pressure difference between the working medium and industrial steam supply is up to 15-25 MPa, and 4-5 pressure reducing valves are required to be arranged on the temperature reducing water pipeline.
Because the water supply pressure at the outlet of the water supply pump is highest in the whole thermodynamic system, the wall thickness of the temperature-reducing water pipeline using the water supply as an industrial steam supply temperature-reducing water source is larger, and the bearing capacity of the material is stronger, so the investment cost of the pipeline is high. Meanwhile, the pipeline is provided with a plurality of pressure reducing valves, and each valve bears larger pressure difference, so that the investment cost is further increased; the plurality of pressure reducing valves are arranged in series, once one pressure reducing valve fails, the temperature reducing water cannot be normally put into operation, and the operation reliability is low; in addition, the excessive setting of the pressure reducing valve causes the poor adjusting capability of the pressure reducing valve on the industrial steam supply temperature and the reduction of the adjusting precision.
Disclosure of Invention
The invention aims to solve the problems of high investment cost of pipelines and valves, low operation reliability and poor regulation capacity of steam temperature when water is supplied from an outlet of a water supply pump as a temperature-reducing water source of an industrial steam supply pipeline, provides an optimization system and a working method of the temperature-reducing water source of the industrial steam supply pipeline, and provides a method for regulating the temperature-reducing water source of the industrial steam supply pipeline to condensate water at an outlet of a condensate pump.
In order to achieve the purpose, the system for optimizing the industrial steam supply and temperature reduction water source comprises an industrial steam extraction pipeline and a water supply pipeline, wherein a temperature reduction water pipeline is arranged between the industrial steam extraction pipeline and the water supply pipeline, a main stop valve is arranged on the temperature reduction water pipeline, and a bypass of the temperature reduction water pipeline and a standby bypass of the temperature reduction water pipeline are arranged in parallel with the main stop valve.
And an auxiliary booster pump and an auxiliary stop valve are arranged on a bypass of the temperature-reducing water pipeline.
And a standby booster pump and a standby stop valve are arranged on a standby bypass of the temperature-reducing water pipeline.
The steam extraction pipeline comprises a steam supply stop valve, a steam supply pressure reducing valve and a steam supply desuperheater;
one end of the steam supply stop valve is connected with the industrial steam extraction, the other end of the steam supply stop valve is connected with the steam supply pressure reducing valve, the steam supply pressure reducing valve is connected with the steam supply desuperheater, and the steam supply desuperheater is connected with the desuperheating water pipeline and supplies steam to the outside.
The outlet of the temperature-reducing water pipeline is connected with a steam supply temperature reducer.
The water supply pipeline comprises a condenser, a condensate pump, a low-pressure heater, a deaerator and a water supply pump;
the condenser is connected with a condensate pump, the condensate pump is connected with a temperature-reducing water pipeline and a low-pressure heater, the low-pressure heater is connected with a deaerator, and the deaerator is connected with a water supply pump.
The inlet of the temperature-reducing water pipeline is connected with the outlet of the condensate pump.
A working method of a system for optimizing an industrial steam supply and temperature reduction water source comprises the following steps:
when the load is high, the main stop valve is opened, and the temperature-reducing water enters the industrial steam extraction pipeline through the temperature-reducing water pipeline;
when the load is low, the main stop valve is closed, and the desuperheating water enters the industrial steam extraction pipeline from the bypass;
when the load is low and the auxiliary booster pump fails, the main stop valve is closed, and the desuperheating water enters the industrial steam extraction pipeline through the standby bypass.
When the load is high, the auxiliary stop valve and the standby stop valve are closed;
when the load is low, the auxiliary stop valve is opened, and the standby stop valve is closed;
when the load is low and the auxiliary booster pump fails, the standby stop valve is opened, and the auxiliary stop valve is closed.
Compared with the prior art, the invention adjusts the temperature-reducing water source of the industrial steam supply pipeline to the condensed water at the outlet of the condensed water pump, the pressure bearing of the temperature-reducing water pipeline is greatly reduced, a pressure-reducing valve is not needed, only two small-lift booster pumps which are used one by one are needed, and the booster pumps are only used at low load, so that the investment cost is greatly reduced. The pressure of condensed water at the outlet of the condensed water pump is far lower than the pressure of water supply, so that the operation safety and reliability are greatly improved; meanwhile, a bypass and a standby bypass are arranged beside the temperature reduction water pipeline, the regulation capability of the steam temperature is guaranteed, and the regulation precision is improved. The invention has the advantages of small transformation range, low investment cost and high operation reliability, and is beneficial to further popularization and application.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
the system comprises a condenser, a condensate pump, a low-pressure heater, a deaerator, a water supply pump, a steam supply stop valve, a steam supply pressure reducing valve, a steam supply desuperheater, a main stop valve, an auxiliary pressure boosting pump, an auxiliary stop valve, a standby pressure boosting pump, a standby stop valve, a low-pressure heater, a deaerator, a water supply pump, a steam supply desuperheater, a steam supply pressure reducing valve, a steam supply desuperheater, a main stop valve, a steam supply pressure boosting pump, a steam supply pressure reducing valve, a steam supply pressure reducing valve, a low pressure water pipe and a low pressure reducing valve, a low pressure water pipe, wherein 1, a low pressure water pipe, a low pressure reducing valve, a low pressure water pipe, a low pressure valve, a low pressure water pipe and a low pressure regulating valve, and a low pressure regulating valve, wherein the low pressure regulating valve, and a low pressure regulating valve, wherein the low.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, an industrial steam supply and temperature reduction water source optimization system comprises an industrial steam extraction pipeline and a water supply pipeline, a temperature reduction water pipeline 14 is arranged between the industrial steam extraction pipeline and the water supply pipeline, a main stop valve 9 is arranged on the temperature reduction water pipeline 14, and a bypass of the temperature reduction water pipeline 14 and a standby bypass of the temperature reduction water pipeline 14 are arranged in parallel with the main stop valve 9.
An auxiliary booster pump 10 and an auxiliary stop valve 11 are provided on a bypass of the temperature-reducing water pipe 14. A backup booster pump 12 and a backup stop valve 13 are provided on a backup bypass of the temperature-reducing water pipe 14. The steam extraction pipeline comprises a steam supply stop valve 6, a steam supply pressure reducing valve 7 and a steam supply desuperheater 8; one end of the steam supply stop valve 6 is connected with the industrial steam extraction, the other end is connected with the steam supply pressure reducing valve 7, the steam supply pressure reducing valve 7 is connected with the steam supply desuperheater 8, and the steam supply desuperheater 8 is connected with the desuperheating water pipeline 14 and supplies steam to the outside. The outlet of the desuperheating water pipeline 14 is connected with the steam supply desuperheater 8.
The water supply pipeline comprises a condenser 1, a condensate pump 2, a low-pressure heater 3, a deaerator 4 and a water supply pump 5; condenser 1 is connected condensate pump 2, and condensate pump 2 is connected desuperheating water pipe 14 and low pressure feed water heater 3, and low pressure feed water heater 3 is connected oxygen-eliminating device 4, and water-feeding pump 5 is connected to oxygen-eliminating device 4. The inlet of the temperature-reducing water pipe 14 is connected with the outlet of the condensate pump 2.
A working method of a system for optimizing an industrial steam supply and temperature reduction water source comprises the following steps:
after the condensed water at the outlet of the condenser 1 is boosted by the condensed water pump 2, the condensed water sequentially passes through the low-pressure heater 3, the deaerator 4 and the water feed pump 5, enters the high-pressure heater and further rises in temperature, and then enters the boiler.
When the load is high, the main stop valve 9 is opened, the auxiliary stop valve 11 and the standby stop valve 13 are closed, and the temperature-reducing water enters the industrial steam supply pipeline from the main path;
when the load is low, the auxiliary stop valve 11 is opened, the main stop valve 9 and the standby stop valve 13 are closed, and the desuperheating water enters the industrial steam supply pipeline through a bypass;
when the auxiliary booster pump 10 breaks down, the standby stop valve 13 is opened, the main stop valve 9 and the auxiliary stop valve 11 are closed, and the desuperheating water enters the industrial steam supply pipeline through the standby bypass.
Claims (9)
1. The utility model provides a system that industry steam supply temperature reduction water source was optimized, its characterized in that, includes industry extraction of steam pipeline and water supply line, is provided with temperature reduction water pipeline (14) between industry extraction of steam pipeline and water supply line, is provided with on temperature reduction water pipeline (14) main stop valve (9), is provided with the bypass of temperature reduction water pipeline (14) and the reserve bypass of temperature reduction water pipeline (14) with main stop valve (9) parallelly connected.
2. The system for optimizing an industrial steam supply and temperature-reducing water source as claimed in claim 1, wherein an auxiliary booster pump (10) and an auxiliary stop valve (11) are arranged on a bypass of the temperature-reducing water pipeline (14).
3. The system for optimizing an industrial steam supply and temperature-reducing water source as claimed in claim 1, wherein a standby booster pump (12) and a standby stop valve (13) are arranged on a standby bypass of the temperature-reducing water pipeline (14).
4. The system for optimizing the industrial steam supply and temperature reduction water source according to the claim 1, wherein the steam extraction pipeline comprises a steam supply stop valve (6), a steam supply pressure reducing valve (7) and a steam supply desuperheater (8);
one end of the steam supply stop valve (6) is connected with the industrial steam extraction, the other end of the steam supply stop valve is connected with the steam supply pressure reducing valve (7), the steam supply pressure reducing valve (7) is connected with the steam supply desuperheater (8), and the steam supply desuperheater (8) is connected with the desuperheating water pipeline (14) and supplies steam to the outside.
5. An industrial steam and water supply optimization system according to claim 4, wherein the outlet of the desuperheater (8) is connected with the outlet of the desuperheater (14).
6. The system for optimizing the industrial steam supply and temperature reduction water source according to claim 1, wherein the water supply pipeline comprises a condenser (1), a condensate pump (2), a low-pressure heater (3), a deaerator (4) and a water supply pump (5);
condensate pump (2) is connected in condenser (1), and desuperheating water pipeline (14) and low pressure feed water heater (3) are connected in condensate pump (2), and oxygen-eliminating device (4) is connected in low pressure feed water heater (3), and feed water pump (5) is connected in oxygen-eliminating device (4).
7. The system for optimizing the industrial steam supply and temperature reduction water source is characterized in that an inlet of the temperature reduction water pipeline (14) is connected with an outlet of the condensate pump (2).
8. The method of operating an industrial steam and water desuperheating source optimization system of claim 1, comprising the steps of:
when the load is high, the main stop valve (9) is opened, and the temperature-reducing water enters the industrial steam extraction pipeline from the temperature-reducing water pipeline (14);
when the load is low, the main stop valve (9) is closed, and the temperature-reducing water enters the industrial steam extraction pipeline through the bypass;
when the load is low and the auxiliary booster pump (10) breaks down, the main stop valve (9) is closed, and the desuperheating water enters the industrial steam extraction pipeline through the standby bypass.
9. The method for operating an industrial steam and water supply system with reduced temperature as claimed in claim 8, wherein the auxiliary stop valve (11) and the backup stop valve (13) are closed when the load is high;
when the load is low, the auxiliary stop valve (11) is opened, and the standby stop valve (13) is closed;
when the load is low and the auxiliary booster pump (10) fails, the standby stop valve (13) is opened, and the auxiliary stop valve (11) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110616561.4A CN113217905A (en) | 2021-06-02 | 2021-06-02 | System for optimizing industrial steam supply and temperature reduction water source and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110616561.4A CN113217905A (en) | 2021-06-02 | 2021-06-02 | System for optimizing industrial steam supply and temperature reduction water source and working method |
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| CN113217905A true CN113217905A (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110616561.4A Pending CN113217905A (en) | 2021-06-02 | 2021-06-02 | System for optimizing industrial steam supply and temperature reduction water source and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646020A (en) * | 2022-03-31 | 2022-06-21 | 华能营口热电有限责任公司 | Power grid steam temperature and pressure reduction device, thermoelectric peak regulation system and pressure reduction regulation method |
-
2021
- 2021-06-02 CN CN202110616561.4A patent/CN113217905A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646020A (en) * | 2022-03-31 | 2022-06-21 | 华能营口热电有限责任公司 | Power grid steam temperature and pressure reduction device, thermoelectric peak regulation system and pressure reduction regulation method |
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