CN209960461U - A quick load-raising system for thermal power plant - Google Patents
A quick load-raising system for thermal power plant Download PDFInfo
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- CN209960461U CN209960461U CN201920191916.8U CN201920191916U CN209960461U CN 209960461 U CN209960461 U CN 209960461U CN 201920191916 U CN201920191916 U CN 201920191916U CN 209960461 U CN209960461 U CN 209960461U
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Abstract
The utility model discloses a quick load-raising system for thermal power plant, the main equipment includes: a high-temperature condensed water inlet pipeline, a high-temperature condensed water outlet pipeline, a hot water storage tank, a low-temperature condensed water inlet pipeline, a low-temperature condensed water outlet pipeline and a nitrogen pipeline. The high-temperature condensed water inlet pipeline is connected with an outlet of the highest-level low heater, the high-temperature condensed water outlet pipeline is connected with an outlet of the deaerator, the low-temperature condensed water inlet pipeline is connected with an outlet of the shaft seal heater, the low-temperature condensed water outlet pipeline is connected with the condenser, and the nitrogen pipeline is connected with a nitrogen busbar of a power plant. The upper part of the heat storage water tank is provided with a high-temperature condensed water inlet and a high-temperature condensed water outlet, the lower part of the heat storage water tank is provided with a low-temperature condensed water inlet and a low-temperature condensed water outlet, and the top of the heat storage water tank is provided with a nitrogen inlet and a nitrogen outlet. The inside of the hot water storage tank is provided with 2 multi-layer pore plates. The utility model discloses can respond to the load-lifting order of electric wire netting fast.
Description
Technical Field
The invention belongs to the field of thermal power of a thermal power plant, and particularly relates to a rapid load-increasing system for the thermal power plant.
Background
In a thermal power plant, coal is combusted to produce steam which drives a steam turbine to generate electricity. As the pulverized coal transportation, the pulverized coal combustion and the steam generation need a period of time, the quick response of the thermal power generating unit to the power grid load-increasing command is a difficult point in the operation of the thermal power generating unit. The current scheme for solving the problem of rapid load increase mainly focuses on the transformation of a boiler side coal mill. The invention provides a novel solution of a heat storage system for increasing condensed water on the side of a steam turbine.
Disclosure of Invention
In order to solve the problems, the invention discloses a rapid load increasing system for a thermal power plant, wherein a unit receives a load increasing command from a power grid at the time of low load, can quickly respond and improve the power generation power.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a quick load-raising system for a thermal power plant is characterized in that a set of heat storage system is added in a condensed water system of the thermal power plant. The heat storage system consists of a hot water storage tank, a condensed water pipeline and a nitrogen pipeline; the hot water storage tank is vertically arranged, the pressure in the hot water storage tank is about 300kPa, the middle part of the hot water storage tank is a working area, a plurality of layers of pore plates are arranged above and below the working area, the upper part of the working area stores high-temperature condensed water with the temperature of about 130 ℃, and the lower part of the working area stores low-temperature condensed water with the temperature of about 45 ℃; there are water inlet, the delivery port of high temperature condensate water on the work area upper portion, have nitrogen gas air inlet and gas outlet at the top of work area, have water inlet, the delivery port of low temperature condensate water in the lower part of work area, the condensate pipe way divide into: a high-temperature condensed water inlet pipeline, a high-temperature condensed water outlet pipeline, a low-temperature condensed water inlet pipeline and a low-temperature condensed water outlet pipeline; one end of the high-temperature condensed water inlet pipeline is connected with the highest-level low-pressure outlet of the power plant equipment, and the other end of the high-temperature condensed water inlet pipeline is connected with a high-temperature condensed water inlet; one end of the high-temperature condensed water outlet pipeline is connected with an outlet of a deaerator of the power plant equipment, and the other end of the high-temperature condensed water outlet pipeline is connected with a water outlet of the high-temperature condensed water; one end of the low-temperature condensed water inlet pipeline is connected with an outlet of a shaft seal heater of the power plant equipment, and the other end of the low-temperature condensed water inlet pipeline is connected with a water inlet of the low-temperature condensed water; one end of the low-temperature condensed water outlet pipeline is connected with a condenser of the power plant equipment, and the other end of the low-temperature condensed water outlet pipeline is connected with a water outlet of the low-temperature condensed water; valves, pressure measuring points and flow measuring points are uniformly arranged on the condensed water pipeline and the nitrogen pipeline, a booster pump is further arranged on the high-temperature condensed water outlet pipeline, a flash tank is further arranged on the low-temperature condensed water outlet pipeline, one end of the nitrogen pipeline is connected with a nitrogen bus bar of the power plant equipment, and the other end of the nitrogen pipeline is connected with a nitrogen inlet.
When the unit is loaded, the heat storage system releases heat. High-temperature condensed water flows into the deaerator from the hot water storage tank, and the response capacity of the unit to the load-up is improved. Meanwhile, low-temperature condensed water flows into the bottom of the water tank from the shaft seal heater so as to keep the water level of the water tank unchanged. And when the load of the unit is stable, the heat storage system starts to store heat. High-temperature condensed water flows into the heat storage water tank from the highest level to the lowest level, and meanwhile, low-temperature condensed water in the heat storage water tank flows into the condenser. The top of the water storage tank is filled with nitrogen, and the water tank operates under the atmosphere of nitrogen.
As an improvement of the invention, a pressure measuring point, a liquid level measuring point and a temperature measuring point are arranged in the working area.
As an improvement of the invention, the opening rate of the multilayer pore plate is 20-50%.
As an improvement of the invention, the material of the heat storage water tank and the multilayer pore plate is stainless steel.
The invention has the beneficial effects that:
according to the rapid load-increasing system for the thermal power plant, when the load is low, the unit receives a load-increasing command from the power grid, can quickly respond, can shorten the response time, reduces the power generation quality, and maintains the stability of the power grid.
Drawings
FIG. 1 is a process flow diagram of the rapid load ramp system of the present invention;
FIG. 2 is a schematic structural view of a hot water storage tank;
list of reference numerals:
1-a high-temperature condensed water inlet pipeline; 2-high temperature condensed water outlet pipeline; 3-a hot water storage tank; 4-a booster pump; 5-a valve; 6-pressure measuring point; 7-flow point; 8-a low-temperature condensed water inlet pipeline; 9-a low-temperature condensed water outlet pipeline; 10-a flash tank; 11-nitrogen line; 12-liquid level measuring point; 13-nitrogen outlet; 14-a high-temperature condensed water outlet; 15-nitrogen inlet; 16-high temperature condensed water inlet; 17-a multilayer orifice plate; 18-temperature measurement point; 19-a low-temperature condensed water inlet; 20-a low-temperature condensed water outlet; 21-working area.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1, the main equipment of a rapid load-up system for a thermal power plant according to the present invention includes: a high-temperature condensed water inlet pipeline 1, a high-temperature condensed water outlet pipeline 2, a hot water storage tank 3, a low-temperature condensed water inlet pipeline 8, a low-temperature condensed water outlet pipeline 9 and a nitrogen pipeline 11. The high-temperature condensed water inlet pipeline 1 is connected with an outlet of a 5# low-pressure heater of power plant equipment outside the system, the 5# low-pressure heater is the highest-level low-pressure heater of the power plant, and a valve 5, a pressure measuring point 6 and a flow measuring point 7 are arranged on the high-temperature condensed water inlet pipeline 1. When the rapid load-raising system operates, 5# low-heating high-temperature condensed water can be introduced into the heat storage water tank 3 according to the requirement. The high-temperature condensed water outlet pipeline 2 is connected with an outlet of a deaerator of power plant equipment outside the system, and a booster pump 4, a valve 5, a pressure measuring point 6 and a flow measuring point 7 are arranged on the high-temperature condensed water outlet pipeline 2. When the rapid load-increasing system operates, high-temperature condensed water in the heat storage water tank 3 can be pumped to the outlet of the deaerator by a pump according to requirements. The low-temperature condensed water inlet pipeline 8 is connected with an outlet of a shaft seal heater of power plant equipment outside the system, and a valve 5, a pressure measuring point 6 and a flow measuring point 7 are arranged on the low-temperature condensed water inlet pipeline 8. When the rapid load-raising system operates, the low-temperature condensed water in the shaft seal heater can be introduced into the heat storage water tank 3 according to the requirement. The low-temperature condensed water outlet pipeline 9 is connected with a condenser of power plant equipment outside the system, and a flash tank 10, a valve 5, a pressure measuring point 6 and a flow measuring point 7 are arranged on the low-temperature condensed water outlet pipeline 9. When the rapid load-increasing system operates, low-temperature condensed water in the heat storage water tank 3 can be led to the condenser according to requirements. The nitrogen pipeline 11 is connected with a nitrogen busbar of power plant equipment outside the system, and the nitrogen pipeline 11 is provided with a valve 5, a pressure measuring point 6 and a flow measuring point 7. When the rapid load-raising system operates, nitrogen can be introduced into the heat storage water tank 3 according to the requirement.
The operation mode of the rapid load-increasing system for the thermal power plant is as follows:
when the unit is rapidly loaded, the amount of steam entering the steam turbine is increased, the water yield of the deaerator is kept unchanged, and insufficient condensed water is supplemented from the rapid load-increasing system. The specific operation is as follows: and conveying the high-temperature condensed water at the temperature of about 135 ℃ in the hot water storage tank 3 to an outlet of a deaerator through a high-temperature condensed water outlet pipeline 2. In order to maintain the water level in the tank stable, the low-temperature condensed water at the temperature of about 45 ℃ in the shaft seal heater is conveyed into the hot water storage tank 3 through the low-temperature condensed water inlet pipeline 8.
When the unit operates stably, the heat can be stored in the rapid load-increasing system. The specific operation is as follows: the flow of the condensed water of the unit is increased, the water amount entering the deaerator is kept unchanged, and the redundant high-temperature condensed water with the temperature of about 135 ℃ enters the hot water storage tank 3 through the high-temperature condensed water inlet pipeline 1. In order to maintain the water level in the tank to be stable, the low-temperature condensed water at the temperature of about 45 ℃ in the hot water storage tank 3 is discharged into the condenser through the low-temperature condensed water outlet pipeline 9.
In order to reduce corrosion of the tank body, nitrogen is injected into the tank body. The pressure in the tank was maintained at about 300kPa during system operation. When the pressure in the tank is less than 300kPa, nitrogen is injected into the heat storage water tank 3 through the nitrogen pipeline 11; when the pressure in the tank is more than 300kPa, nitrogen is discharged to the atmosphere through the nitrogen outlet 13.
The structure of the hot water storage tank 3 is shown in fig. 2. The upper part of the storage tank is high-temperature condensed water at 135 ℃, and the lower part of the storage tank is low-temperature condensed water at 45 ℃.
On the outer surface of the hot water storage tank 3, a low-temperature condensed water inlet 19 and a low-temperature condensed water outlet 20 are arranged at the lower part, a high-temperature condensed water inlet 16 and a high-temperature condensed water outlet 14 are arranged at the upper part, and a nitrogen gas inlet 15 and a nitrogen gas outlet 13 are arranged at the top. The high-temperature condensed water inlet 16 is connected with the high-temperature condensed water inlet pipeline 1, the high-temperature condensed water outlet 14 is connected with the high-temperature condensed water outlet pipeline 2, the low-temperature condensed water inlet 19 is connected with the low-temperature condensed water inlet pipeline 8, the low-temperature condensed water outlet 20 is connected with the low-temperature condensed water outlet pipeline 9, and the nitrogen gas inlet 15 is connected with the nitrogen pipeline 11.
Inside the hot water storage tank 3, there are pipes connecting a high-temperature condensed water inlet 16, a high-temperature condensed water outlet 14, a low-temperature condensed water inlet 19, and a low-temperature condensed water outlet 20 with the central region inside the tank, so that the injection and extraction of the condensed water are performed at the central position of the tank (i.e., the working region 21). A multi-layer pore plate 17 is arranged between the working area 21 and the high-temperature condensed water; likewise, a multi-layer perforated plate 17 is also arranged between the working area and the low-temperature condensate. The multi-layer pore plate is used for reducing the influence of the injection and extraction of the condensed water on the temperature field in the tank.
The heat storage water tank 3 and the multilayer pore plate 17 are made of stainless steel, and a pressure measuring point 6, a liquid level measuring point 12 and a temperature measuring point 18 are arranged in the tank.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.
Claims (6)
1. A quick load-lifting system for a thermal power plant, characterized by: comprises a hot water storage tank (3), a condensed water pipeline and a nitrogen pipeline (11); the hot water storage tank is vertically arranged, the middle part of the hot water storage tank 3 is a working area (21), a plurality of layers of pore plates (17) are arranged above and below the working area, the upper part of the working area (21) stores high-temperature condensed water, and the lower part of the working area stores low-temperature condensed water; there are water inlet (16), delivery port (14) of high temperature condensate water on work area upper portion, have nitrogen gas air inlet (15) and gas outlet (13) at the top of storing up hot-water cylinder (3), have water inlet (19), delivery port (20) of low temperature condensate water in the lower part of storing up hot-water cylinder (3), the condensate pipe way divide into: a high-temperature condensed water inlet pipeline (1), a high-temperature condensed water outlet pipeline (2), a low-temperature condensed water inlet pipeline (8) and a low-temperature condensed water outlet pipeline (9); one end of the high-temperature condensed water inlet pipeline is connected with the highest-level low-pressure outlet of the power plant equipment, and the other end of the high-temperature condensed water inlet pipeline is connected with a high-temperature condensed water inlet (16); one end of the high-temperature condensed water outlet pipeline is connected with an outlet of a deaerator of the power plant equipment, and the other end of the high-temperature condensed water outlet pipeline is connected with a water outlet (14) of the high-temperature condensed water; one end of the low-temperature condensed water inlet pipeline is connected with an outlet of a shaft seal heater of the power plant equipment, and the other end of the low-temperature condensed water inlet pipeline is connected with a water inlet (19) of the low-temperature condensed water; one end of the low-temperature condensed water outlet pipeline is connected with a condenser of the power plant equipment, and the other end of the low-temperature condensed water outlet pipeline is connected with a water outlet (20) of the low-temperature condensed water; valves (5), pressure measuring points (6) and flow measuring points (7) are uniformly arranged on the condensed water pipeline and the nitrogen pipeline (11), a booster pump (4) is further arranged on the high-temperature condensed water outlet pipeline, a flash tank (10) is further arranged on the low-temperature condensed water outlet pipeline, one end of the nitrogen pipeline (11) is connected with a nitrogen busbar of the power plant equipment, and the other end of the nitrogen pipeline is connected with a nitrogen inlet (15).
2. A rapid load-lifting system for a thermal power plant according to claim 1, characterized in that: the pressure in the heat storage water tank (3) is 300 kPa.
3. A rapid load-lifting system for a thermal power plant according to claim 1, characterized in that: the temperature of the high-temperature condensed water is 130 ℃.
4. A rapid load-lifting system for a thermal power plant according to claim 1, characterized in that: the temperature of the low-temperature condensed water is 45 ℃.
5. A rapid load-lifting system for a thermal power plant according to claim 1, characterized in that: and a pressure measuring point, a liquid level measuring point (12) and a temperature measuring point (18) are arranged in the working area.
6. A rapid load-lifting system for a thermal power plant according to claim 1, characterized in that: the aperture ratio of the multilayer pore plate (17) is 20-50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920191916.8U CN209960461U (en) | 2019-02-12 | 2019-02-12 | A quick load-raising system for thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920191916.8U CN209960461U (en) | 2019-02-12 | 2019-02-12 | A quick load-raising system for thermal power plant |
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| CN209960461U true CN209960461U (en) | 2020-01-17 |
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| CN201920191916.8U Active CN209960461U (en) | 2019-02-12 | 2019-02-12 | A quick load-raising system for thermal power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812799A (en) * | 2019-02-12 | 2019-05-28 | 南京龙源环保有限公司 | A kind of quick load up system for thermal power plant |
| CN113860414A (en) * | 2021-09-02 | 2021-12-31 | 华电湖北发电有限公司武昌热电分公司 | Heat supply first station condensation return water nitrogen regulation deoxidization system |
-
2019
- 2019-02-12 CN CN201920191916.8U patent/CN209960461U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812799A (en) * | 2019-02-12 | 2019-05-28 | 南京龙源环保有限公司 | A kind of quick load up system for thermal power plant |
| CN109812799B (en) * | 2019-02-12 | 2023-10-20 | 国能龙源环保南京有限公司 | A quick load lifting system for thermal power plant |
| CN113860414A (en) * | 2021-09-02 | 2021-12-31 | 华电湖北发电有限公司武昌热电分公司 | Heat supply first station condensation return water nitrogen regulation deoxidization system |
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Address after: 211101 Room 401, No. 1, Huashen Avenue, Yuhua District, Nanjing, Jiangsu Province Patentee after: Guoneng Longyuan environmental protection Nanjing Co.,Ltd. Address before: 210012 Room 401, No.1 Huashen Avenue, Yuhuatai District, Nanjing City, Jiangsu Province Patentee before: NANJING LONGYUAN ENVIRONMENT Co.,Ltd. |
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