CN210289857U - Thermal power plant industrial heat supply energy-saving system participating in deep peak shaving - Google Patents
Thermal power plant industrial heat supply energy-saving system participating in deep peak shaving Download PDFInfo
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- CN210289857U CN210289857U CN201920578093.4U CN201920578093U CN210289857U CN 210289857 U CN210289857 U CN 210289857U CN 201920578093 U CN201920578093 U CN 201920578093U CN 210289857 U CN210289857 U CN 210289857U
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Abstract
The utility model discloses a thermal power plant industrial heat supply energy-saving system participating in deep peak shaving, wherein a medium-pressure regulating valve is arranged on a reheating steam pipe; the steam inlet end of the steam extraction pipeline at the high heat exhaust end is connected with the reheating steam pipe, and the steam outlet end is connected with the steam inlet end of the temperature and pressure reducer; a third valve is arranged at the steam inlet end of the temperature and pressure reducer, and a fourth valve is arranged at the steam outlet end of the temperature and pressure reducer; the temperature and pressure reducer is provided with a high-exhaust bypass and is connected with a pressure matcher, a sixth valve is installed at a high-pressure steam inlet end of the pressure matcher, a low-pressure steam inlet end of the pressure matcher is connected with a steam extraction end of a steam turbine intermediate pressure cylinder through an intermediate-exhaust steam extraction pipeline, a first valve is installed on the intermediate-exhaust steam extraction pipeline, a steam outlet end of the pressure matcher is connected with an industrial steam supply main pipe, and a seventh valve is installed at a steam outlet end of the pressure matcher; the pressure matcher is provided with an exhaust bypass, and an eighth valve is installed on the exhaust bypass. The utility model relates to a rationally, the dependable performance, be favorable to improving the heat supply quality of steam power plant.
Description
Technical Field
The utility model relates to a steam power plant industry heat supply economizer system that participates in degree of depth peak shaving mainly is applicable to the heat supply and reforms transform the unit, belongs to the combined heat and power generation field.
Background
In recent years, renewable energy sources such as wind energy, solar energy and the like in China develop rapidly, however, the renewable energy sources have obvious seasonality, day and night property and climate property, and the phenomena of wind abandon and light abandon are serious due to obvious differences among seasons, days, nights and different climates, so that the renewable energy sources are required to be consumed by power plants with improved peak regulation capability. And the power demand is influenced by day and night replacement and seasonal change, the power generation amount needs to be adjusted along with the change of the power consumption, otherwise, the power grid is easy to have huge impact. Therefore, the power plant needs to have strong peak regulation capability to meet the power development requirement. In addition, in the early stage of China, the thermal power plant for industrial steam extraction centralized heat supply is realized, and the energy loss is serious because the heat supply technology is simple and extensive. Under the high-load working condition of a unit, high-pressure gas is directly utilized to meet steam extraction parameters through temperature reduction and pressure reduction, so that the throttling loss is serious in the industrial steam extraction process. Therefore, the peak regulation capacity of the unit is ensured and the potential of the unit for energy conservation and consumption reduction is excavated while the maximum heat supply is ensured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a reasonable in design, dependable performance, guarantee heat supply capacity and unit peak shaving ability, be favorable to improving the steam power plant industry heat supply economizer system of the participation degree of depth peak shaving of steam power plant comprehensive energy utilization efficiency simultaneously.
The utility model provides a technical scheme that above-mentioned problem adopted is: the thermal power plant industrial heat supply energy-saving system participating in deep peak regulation is characterized by comprising a boiler, a turbine high-pressure cylinder, a turbine intermediate-pressure cylinder, a turbine low-pressure cylinder, a temperature and pressure reduction device, a pressure matcher, a condenser and a condensate pump; the boiler is connected with a steam turbine high-pressure cylinder, the steam turbine high-pressure cylinder is connected with a steam turbine intermediate-pressure cylinder through a reheating steam pipe, and an intermediate-pressure regulating valve is mounted on the reheating steam pipe; the steam turbine medium pressure cylinder is connected with the steam turbine low pressure cylinder, and the steam turbine low pressure cylinder, the condenser and the condensate pump are sequentially connected; the steam inlet end of the high heat extraction end steam extraction pipeline is connected with the reheating steam pipe, the steam outlet end of the high heat extraction end steam extraction pipeline is connected with the steam inlet end of the temperature and pressure reducer, and a second valve is mounted on the high heat extraction end steam extraction pipeline; a third valve is arranged at the steam inlet end of the temperature and pressure reducer, and a fourth valve is arranged at the steam outlet end of the temperature and pressure reducer; the temperature and pressure reducer is provided with a high-exhaust bypass, and a fifth valve is arranged on the high-exhaust bypass; the temperature and pressure reducer is connected with a pressure matcher, a six-valve is installed at a high-pressure steam inlet end of the pressure matcher, a low-pressure steam inlet end of the pressure matcher is connected with a steam extraction end of a steam turbine intermediate pressure cylinder through an intermediate exhaust steam extraction pipeline, a one-valve is installed on the intermediate exhaust steam extraction pipeline, a steam outlet end of the pressure matcher is connected with an industrial steam supply main pipe, a seven-valve is installed at a steam outlet end of the pressure matcher, and the industrial steam supply main pipe is used for supplying steam to industrial users; the pressure matcher is provided with an exhaust bypass, and an eighth valve is installed on the exhaust bypass.
Furthermore, a medium-pressure regulating valve is installed on the reheating steam pipe, when the electric load rate of the unit is gradually reduced from 100% and the high-exhaust steam extraction pressure parameter cannot meet the requirements of industrial users, the medium-pressure regulating valve participates in regulation, and under other working conditions, the medium-pressure regulating valve is fully opened.
Compared with the prior art, the utility model, have following advantage and effect: (1) the steam extraction device has the advantages of reasonable design, simple structure and reliable performance, and avoids energy loss while ensuring the operation efficiency and the operation safety of the unit based on the cascade utilization principle of energy and reasonably designing the industrial steam extraction port. (2) The system can ensure the stability of heat supply parameters of industrial users while ensuring the machine set to participate in deep peak regulation under low load.
Drawings
Fig. 1 is a schematic view of the overall structure in the embodiment of the present invention.
The numbering in the figures illustrates: 1-boiler, 2-turbine high pressure cylinder, 3-turbine intermediate pressure cylinder, 4-turbine low pressure cylinder, 5-first valve, 6-intermediate exhaust steam extraction pipeline, 7-reheating steam pipe, 8-high exhaust end steam extraction pipeline, 9-second valve, 10-third valve, 11-fourth valve, 12-fifth valve, 13-high exhaust bypass, 14-temperature and pressure reduction device, 15-sixth valve, 16-seventh valve, 17-exhaust bypass, 18-eighth valve, 20-pressure adapter, 21-intermediate pressure regulating valve, 22-industrial steam supply main pipe, 23-condenser and 24-condensate pump.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1, the industrial heating energy-saving system of the thermal power plant participating in deep peak shaving in the embodiment includes a boiler 1, a high-pressure turbine cylinder 2, a medium-pressure turbine cylinder 3, a low-pressure turbine cylinder 4, a temperature and pressure reducer 14, a pressure matcher 20, a condenser 23, and a condensate pump 24.
The boiler 1 is connected with a steam turbine high-pressure cylinder 2, the steam turbine high-pressure cylinder 2 is connected with a steam turbine middle-pressure cylinder 3 through a reheating steam pipe 7, and a middle-pressure regulating valve 21 is installed on the reheating steam pipe 7; the turbine intermediate pressure cylinder 3 is connected with the turbine low pressure cylinder 4, and the turbine low pressure cylinder 4, the condenser 23 and the condensate pump 24 are sequentially connected; the steam inlet end of the high heat extraction end steam extraction pipeline 8 is connected with the reheating steam pipe 7, the steam outlet end of the high heat extraction end steam extraction pipeline 8 is connected with the steam inlet end of the temperature and pressure reducing device 14, and a second valve 9 is installed on the high heat extraction end steam extraction pipeline 8; a third valve 10 is arranged at the steam inlet end of the temperature and pressure reducer 14, and a fourth valve 11 is arranged at the steam outlet end of the temperature and pressure reducer 14; the temperature and pressure reducing device 14 is provided with a high-exhaust bypass 13, and a fifth valve 12 is arranged on the high-exhaust bypass 13; the temperature and pressure reducing device 14 is connected with a pressure matcher 20, a six-valve 15 is installed at a high-pressure steam inlet end of the pressure matcher 20, a low-pressure steam inlet end of the pressure matcher 20 is connected with a steam extraction end of a steam turbine intermediate pressure cylinder 3 through a middle exhaust steam extraction pipeline 6, a first valve 5 is installed on the middle exhaust steam extraction pipeline 6, a steam outlet end of the pressure matcher 20 is connected with an industrial steam supply main pipe 22, a seven-valve 16 is installed at a steam outlet end of the pressure matcher 20, and the industrial steam supply main pipe 22 is used for supplying steam to industrial users; the pressure adapter 20 is provided with an exhaust bypass 17, and an eighth valve 18 is mounted on the exhaust bypass 17.
All the valves have the functions of adjusting, cutting and signal transmission, and can feed back and adjust in real time according to the requirements of industrial users, so that the real-time adjustment between the power plant side and the user side is realized, the over-supply loss is reduced, and the heat supply quality is improved.
The method for adjusting the industrial heat supply energy-saving system of the thermal power plant participating in deep peak shaving comprises the following steps of setting two specific values of X and Y for a unit electrical load rate P, wherein Y is more than 0 and less than X, and the specific values of X and Y meet the following requirements: 1) when P is larger than X, the steam extraction matching of the high heat extraction end steam extraction pipeline 8 and the middle heat extraction steam extraction pipeline 6 is utilized, the requirements of industrial users can be met, and the pressure matcher has a good matching effect; 2) when Y is more than P and less than X, the steam extraction of the middle exhaust steam extraction pipeline 6 and the high heat exhaust end steam extraction pipeline 8 are simultaneously utilized, the requirement of an industrial user can be met, but the matching effect of the pressure matcher is poor, and the steam extraction pressure of the high heat exhaust end steam extraction pipeline 8 is greater than the pressure required by the user; 3) when P is more than 0 and less than Y, the steam extraction pressure of the steam extraction pipeline 8 at the high heat extraction end is less than the pressure required by the user, and the requirement of industrial users cannot be met.
The specific embodiment is as follows:
working condition one (P is more than X): the medium pressure governing valve 21 is opened entirely, opens and adjusts valve 5, No. two valves 9, and the exhaust steam extraction pipeline 6 and the high heat extraction end steam extraction pipeline 8 are taken out the vapour in the use, satisfy the industrial user demand: at the moment, the third valve 10 and the fourth valve 11 are closed, the fifth valve 12, the sixth valve 15 and the seventh valve 16 are opened, the extracted steam of the high heat extraction end steam extraction pipeline 8 enters the pressure adapter 20 through the high exhaust bypass 13, the extracted steam of the middle exhaust steam extraction pipeline 6 directly enters the pressure adapter 20, and the extracted steam of the high heat extraction end steam extraction pipeline and the extracted steam of the middle exhaust steam extraction pipeline are mixed and matched and then are conveyed to the industrial steam supply main pipe 22.
Working condition two (Y is more than P and less than X): the medium pressure regulating valve 21 is fully opened, the first valve 5, the sixth valve 15 and the seventh valve 16 are closed, the second valve 9, the third valve 10, the fourth valve 11 and the eighth valve 18 are opened, steam is extracted by the reheating steam pipe 7 through the steam extraction pipeline 8 at the high heat extraction end, and after the temperature and pressure of the steam is reduced by the temperature and pressure reducer 14, industrial heat supply is carried out outside by the industrial steam supply main pipe 22.
Working condition three (P is more than 0 and less than Y): the medium pressure regulating valve 21 is opened and regulated, the first valve 5, the sixth valve 15 and the seventh valve 16 are closed, the second valve 9, the third valve 10, the fourth valve 11 and the eighth valve 18 are opened, steam is extracted by the reheating steam pipe 7 through the steam extraction pipeline 8 at the high heat extraction end, and after the temperature is reduced by the temperature and pressure reducer 14, industrial heat supply is carried out outside by the industrial steam supply main pipe 22.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structure of the present invention. All equivalent changes made according to the structure, characteristics and principle of the inventive concept are included in the protection scope of the present invention. Various modifications, additions and substitutions by those skilled in the art may be made to the described embodiments without departing from the scope of the invention as defined in the accompanying claims.
Claims (1)
1. The thermal power plant industrial heat supply energy-saving system participating in deep peak regulation is characterized by comprising a boiler (1), a turbine high-pressure cylinder (2), a turbine medium-pressure cylinder (3), a turbine low-pressure cylinder (4), a temperature and pressure reduction device (14), a pressure matcher (20), a condenser (23) and a condensate pump (24); the boiler (1) is connected with a steam turbine high-pressure cylinder (2), the steam turbine high-pressure cylinder (2) is connected with a steam turbine intermediate-pressure cylinder (3) through a reheating steam pipe (7), and an intermediate-pressure regulating valve (21) is installed on the reheating steam pipe (7); the steam turbine medium pressure cylinder (3) is connected with the steam turbine low pressure cylinder (4), and the steam turbine low pressure cylinder (4), the condenser (23) and the condensate pump (24) are sequentially connected; the steam inlet end of a high heat extraction end steam extraction pipeline (8) is connected with a reheating steam pipe (7), the steam outlet end of the high heat extraction end steam extraction pipeline (8) is connected with the steam inlet end of a temperature and pressure reducing device (14), and a second valve (9) is installed on the high heat extraction end steam extraction pipeline (8); a third valve (10) is arranged at the steam inlet end of the temperature and pressure reducer (14), and a fourth valve (11) is arranged at the steam outlet end of the temperature and pressure reducer (14); the temperature and pressure reducing device (14) is provided with a high-exhaust bypass (13), and a fifth valve (12) is arranged on the high-exhaust bypass (13); the temperature and pressure reducing device (14) is connected with a pressure matcher (20), a six-valve (15) is installed at a high-pressure steam inlet end of the pressure matcher (20), a low-pressure steam inlet end of the pressure matcher (20) is connected with a steam extraction end of a steam turbine intermediate pressure cylinder (3) through a middle exhaust steam extraction pipeline (6), a first valve (5) is installed on the middle exhaust steam extraction pipeline (6), a steam outlet end of the pressure matcher (20) is connected with an industrial steam supply main pipe (22), a seven-valve (16) is installed at a steam outlet end of the pressure matcher (20), and the industrial steam supply main pipe (22) is used for supplying steam to industrial users; the pressure matcher (20) is provided with an exhaust bypass (17), and an eighth valve (18) is mounted on the exhaust bypass (17).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920578093.4U CN210289857U (en) | 2019-04-25 | 2019-04-25 | Thermal power plant industrial heat supply energy-saving system participating in deep peak shaving |
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| CN201920578093.4U CN210289857U (en) | 2019-04-25 | 2019-04-25 | Thermal power plant industrial heat supply energy-saving system participating in deep peak shaving |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412557A (en) * | 2020-11-09 | 2021-02-26 | 大庆石油管理局有限公司 | Turbine high-side flexible heat supply system with auxiliary frequency modulation function |
| CN114046494A (en) * | 2021-09-23 | 2022-02-15 | 华能山东发电有限公司烟台发电厂 | Communication system and standby method for industrial steam extraction |
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2019
- 2019-04-25 CN CN201920578093.4U patent/CN210289857U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412557A (en) * | 2020-11-09 | 2021-02-26 | 大庆石油管理局有限公司 | Turbine high-side flexible heat supply system with auxiliary frequency modulation function |
| CN112412557B (en) * | 2020-11-09 | 2022-09-06 | 大庆石油管理局有限公司 | Steam turbine high-side flexible heat supply system with auxiliary frequency modulation function |
| CN114046494A (en) * | 2021-09-23 | 2022-02-15 | 华能山东发电有限公司烟台发电厂 | Communication system and standby method for industrial steam extraction |
| CN114046494B (en) * | 2021-09-23 | 2024-03-22 | 华能山东发电有限公司烟台发电厂 | Communication system and standby method for industrial steam extraction |
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