CN214891444U - Industrial heat supply system used under special condition of thermal power plant - Google Patents
Industrial heat supply system used under special condition of thermal power plant Download PDFInfo
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- CN214891444U CN214891444U CN202120389226.0U CN202120389226U CN214891444U CN 214891444 U CN214891444 U CN 214891444U CN 202120389226 U CN202120389226 U CN 202120389226U CN 214891444 U CN214891444 U CN 214891444U
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- 238000001816 cooling Methods 0.000 claims abstract description 8
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Abstract
The utility model discloses an industry heating system for under thermal power plant special circumstances belongs to thermal power generating unit flexibility and promotes technical field, including boiler, steam turbine high pressure cylinder, steam turbine intermediate pressure cylinder, steam turbine low pressure cylinder, condenser, cooling tower, low pressure feed water heater, oxygen-eliminating device, high pressure feed water heater, circulating water pump, condensate pump, feed pump, start-up boiler, auxiliary steam header and temperature and pressure reduction ware etc. under the condition that does not change thermal power plant's unit, newly-increased partial auxiliary assembly, the switching through opening and close realization heat exchange system of valve is connected. The utility model discloses can realize under the condition that thermal power plant's unit stops entirely, through optimizing the heating mode, improve the unit and supply vapour mode, satisfy hot user's different steam quality demands, effectively alleviate the heat supply pressure that the power generation enterprise faces, also create the income for the enterprise simultaneously.
Description
Technical Field
The utility model relates to an industry heating system for under thermal power plant special case belongs to thermal power generating unit flexibility and promotes technical field.
Background
For a long time, the nation pays attention to the development and popularization of new energy, and the living space of the traditional thermal power industry is seriously influenced, so that thermal power enterprises urgently need to find a mode of creating income for the enterprises while meeting the requirements of power generation load. The development of heat supply technology comes to the end, and under the encouragement of national policies, residents in the three north areas have rapid heat supply development, and the method has great significance for national heat supply popularization. For some reasons, the heating of the residents in the south is not popularized yet, and the industrial heating demand is large.
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, can be used to the industry heating system under the thermal power plant special case to guarantee to supply heat uninterrupted to the outside under the thermal power plant special case.
The utility model provides a technical scheme that above-mentioned problem adopted is: an industrial heating system for special conditions of a thermal power plant is characterized in that: the system comprises a boiler, a turbine high-pressure cylinder, a turbine intermediate-pressure cylinder, a turbine low-pressure cylinder, a condenser, a cooling tower, a low-pressure heater, a deaerator, a high-pressure heater, a circulating water pump, a condensate pump, a water feed pump, a starting boiler, an auxiliary steam header and a temperature and pressure reducer; the steam outlet of the boiler is connected with the steam inlet of a high-pressure cylinder of the steam turbine through a main steam pipeline, the steam outlet of the high-pressure cylinder of the steam turbine is connected with a boiler reheater through a cold re-steam pipeline, the steam outlet of the boiler reheater is connected with the steam inlet of a medium-pressure cylinder of the steam turbine through a reheat steam pipeline, the steam outlet of the medium-pressure cylinder of the steam turbine is connected with the steam inlet of a low-pressure cylinder of the steam turbine through a middle-low cylinder communication pipeline, the steam outlet of the low-pressure cylinder of the steam turbine is connected to a condenser, the circulating water side of the condenser is connected with a cooling tower through a circulating water pump, the condensed water outlet of the condenser is connected to a low-pressure heater through a condensed water pump, the steam side of the low-pressure heater is connected with a low-pressure cylinder of the steam turbine through a low-pressure steam extraction pipeline, the drain port of the low-pressure heater is connected with the condenser through a low-pressure drain pipeline, and the condensed water outlet of the low-pressure heater is connected to a deaerator, the steam side of the deaerator is connected with a steam turbine intermediate pressure cylinder through a medium-pressure steam extraction pipeline, a water supply outlet of the deaerator is connected to a high-pressure heater through a water supply pump, the steam side of the high-pressure heater is connected with a steam turbine high-pressure cylinder through a high-pressure steam extraction pipeline, a drain port of the high-pressure heater is connected with the deaerator through a high-pressure drain pipeline, and a water supply outlet of the high-pressure heater is connected to a boiler; a steam inlet at the steam side of the temperature and pressure reducer is connected with a steam extraction main pipe through an inlet valve of the temperature and pressure reducer, a steam extraction valve is installed on the steam extraction main pipe, a temperature reduction water port of the temperature and pressure reducer is provided with a temperature reduction valve, temperature reduction water can be selected from condensed water, feed water or industrial water, and a steam outlet at the steam side of the temperature and pressure reducer is connected with a heat user through a heat supply pipeline; the starting boiler is connected with the auxiliary steam header through a valve, one side of the auxiliary steam header is provided with a steam extraction check valve, and the steam extraction check valve is provided with a bypass valve.
Furthermore, the exhaust steam of the high-pressure cylinder of the steam turbine enters the auxiliary steam header through the steam extraction main pipe, the steam extraction valve and the steam extraction check valve, meanwhile, external heat supply can be realized through the inlet valve of the temperature and pressure reducer and the temperature and pressure reducer, and the water spray amount of the temperature and pressure reducer can be adjusted through the temperature and pressure reducer, so that an industrial heat supply source is formed.
Furthermore, the exhaust steam of the boiler is started to enter the auxiliary steam header through a valve, and then external heat supply is realized through the bypass valve, the inlet valve of the temperature and pressure reducer and the temperature and pressure reducer, and the water spray quantity of the temperature and pressure reducer can be adjusted through the temperature and pressure reducer, so that another industrial heat supply source is formed.
Further, the boiler is an oil boiler, a gas boiler or an electric boiler.
Compared with the prior art, the utility model, have following advantage and effect:
(1) the utility model has reasonable structural design and simple modification, adds some additional equipment on the basis of the prior art, and realizes the reasonable selection of industrial heat supply heat source under the special condition of the thermal power plant;
(2) the utility model can freely switch the operation and the stop of the operation by opening and closing the valve to change the connection mode of the industrial heating system, realize the adjustment of steam parameters of the entering hot users, has simple operation and convenient control, effectively ensures stable heat supply of enterprises and has higher practical application value;
(3) the utility model discloses can realize under the condition that thermal power plant's unit stops entirely, improve the unit steam supply mode through optimizing the heat supply mode, satisfy hot user's different steam quality demands, effectively alleviate the heat supply pressure that the power generation enterprise faces, also create the income for the enterprise simultaneously.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention.
Fig. 2 is a schematic structural diagram of the middle system during normal heat supply.
Fig. 3 is a schematic structural diagram of the system in the invention for supplying heat under special conditions.
In the figure: the system comprises a boiler 1, a turbine high-pressure cylinder 2, a turbine intermediate-pressure cylinder 3, a turbine low-pressure cylinder 4, a condenser 5, a cooling tower 6, a low-pressure heater 7, a deaerator 8, a high-pressure heater 9, a circulating water pump 10, a condensate pump 11, a water feed pump 12, a starting boiler 13, an auxiliary steam header 14, a temperature and pressure reduction device 15, a heat consumer 16, a main steam pipeline 17, a high-pressure steam extraction pipeline 18, a cold-re-steam pipeline 19, a reheat steam pipeline 20, a steam extraction main pipe 21, a steam extraction valve 22, a medium-pressure steam extraction pipeline 23, a medium-low pressure cylinder communication pipeline 24, a low-pressure steam extraction pipeline 25, a low-pressure water drainage pipeline 26, a high-pressure water drainage pipeline 28, a valve 29, a steam extraction check valve 30, a bypass valve 31, a temperature and pressure reduction device inlet valve 32, a temperature reduction valve 33 and a heat supply pipeline 34.
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
Referring to fig. 1, in this embodiment, an industrial heating system for a special situation of a thermal power plant includes a boiler 1, a turbine high-pressure cylinder 2, a turbine intermediate-pressure cylinder 3, a turbine low-pressure cylinder 4, a condenser 5, a cooling tower 6, a low-pressure heater 7, a deaerator 8, a high-pressure heater 9, a circulating water pump 10, a condensate pump 11, a feed water pump 12, a starting boiler 13, an auxiliary steam header 14, and a temperature and pressure reducing device 15; the steam outlet of the boiler 1 is connected with the steam inlet of the high-pressure turbine cylinder 2 through a main steam pipeline 17, the steam outlet of the high-pressure turbine cylinder 2 is connected with the reheater of the boiler 1 through a cold-reheat steam pipeline 19, the steam outlet of the reheater of the boiler 1 is connected with the steam inlet of the intermediate-pressure turbine cylinder 3 through a reheat steam pipeline 20, the steam outlet of the intermediate-pressure turbine cylinder 3 is connected with the steam inlet of the low-pressure turbine cylinder 4 through a low-pressure and medium-pressure cylinder communication pipeline 24, the steam outlet of the low-pressure turbine cylinder 4 is connected with the condenser 5, the circulating water side of the condenser 5 is connected with the cooling tower 6 through a circulating water pump 10, the condensed water outlet of the condenser 5 is connected with the low-pressure heater 7 through a condensed water pump 11, the steam side of the low-pressure heater 7 is connected with the low-pressure turbine cylinder 4 through a low-pressure steam extraction pipeline 25, and the drain of the low-pressure heater 7 is connected with the condenser 5 through a low-pressure drain pipeline 26, a condensed water outlet of the low-pressure heater 7 is connected to a deaerator 8, a steam side of the deaerator 8 is connected with a steam turbine intermediate pressure cylinder 3 through a medium-pressure steam extraction pipeline 23, a water supply outlet of the deaerator 8 is connected to a high-pressure heater 9 through a water supply pump 12, a steam side of the high-pressure heater 9 is connected with a steam turbine high-pressure cylinder 2 through a high-pressure steam extraction pipeline 18, a drain port of the high-pressure heater 9 is connected with the deaerator 8 through a high-pressure drain pipeline 28, and a water supply outlet of the high-pressure heater 9 is connected to the boiler 1; a steam inlet at the steam side of the temperature and pressure reducer 15 is connected with a steam extraction main pipe 21 through a temperature and pressure reducer inlet valve 32, a steam extraction valve 22 is installed on the steam extraction main pipe 21, a temperature reduction valve 33 is installed at a temperature reduction water port of the temperature and pressure reducer 15, the temperature reduction water can be condensed water, feed water or industrial water, and a steam outlet at the steam side of the temperature and pressure reducer 15 is connected with a heat user 16 through a heat supply pipeline 34; the starting boiler 13 is connected with the auxiliary steam header 14 through a valve 29, one side of the auxiliary steam header 14 is provided with a steam extraction check valve 30, and the steam extraction check valve 30 is provided with a bypass valve 31.
In this embodiment, the exhaust steam of the high pressure turbine cylinder 2 enters the auxiliary steam header 14 through the steam extraction main pipe 21, the steam extraction valve 22 and the steam extraction check valve 30, and meanwhile, heat can be supplied to the outside through the inlet valve 32 of the temperature and pressure reducer 15, and the water spray rate of the temperature and pressure reducer 15 can be adjusted through the temperature and pressure reducer 33, so that a heat source for industrial heat supply is formed.
In this embodiment, the exhaust steam from the boiler 13 enters the auxiliary steam header 14 through the valve 29, and further, the heat is supplied to the outside through the bypass valve 31, the inlet valve 32 of the temperature and pressure reducer and the temperature and pressure reducer 15, and the amount of water sprayed from the temperature and pressure reducer 15 can be adjusted through the temperature and pressure reducer 33, thereby forming another industrial heat source.
Referring to fig. 2 and 3, the operation method of the industrial heating system for the special case of the thermal power plant is as follows:
under the condition that the unit normally supplies heat to the outside, the exhausted steam of the high-pressure steam turbine cylinder 2 can be used for supplying heat to the outside through the steam extraction main pipe 21, the steam extraction valve 22, the inlet valve 32 of the temperature and pressure reducer and the temperature and pressure reducer 15, and the bypass valve 31 is closed at the moment. The steam extraction flow and the water spraying flow entering the temperature-reducing pressure reducer 15 are adjusted by adjusting the opening degrees of the steam extraction valve 22, the inlet valve 32 of the temperature-reducing pressure reducer and the temperature-reducing valve 33, so that the adjustment of the steam parameters entering the heat consumer 16 is realized.
Under the condition that the unit is completely stopped, the steam discharged by the boiler 13 is started to supply heat to the outside through the valve 29, the auxiliary steam header 14, the bypass valve 31, the inlet valve 32 of the temperature-reducing pressure reducer and the temperature-reducing pressure reducer 15, at the moment, the steam extraction valve 22 and the valves on the auxiliary pipelines connected with the auxiliary steam header 14 need to be closed, and the steam extraction flow and the water spraying flow entering the temperature-reducing pressure reducer 15 are adjusted by adjusting the opening degrees of the valve 29, the bypass valve 31, the inlet valve 32 of the temperature-reducing pressure reducer and the temperature-reducing valve 33, so that the adjustment of steam parameters entering the heat consumer 16 is realized.
In the specific operation method of this embodiment, when adjusting the flow rate flowing through each device, the opening degree of each valve is adjusted mainly by remotely transmitting the opening degree signal of the valve through the existing DCS system, so as to adjust the flow rate.
Those not described in detail in this specification are well within the skill of the art.
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 utility model are included in the protection scope of the utility model. 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 (2)
1. An industrial heating system for special conditions of a thermal power plant is characterized in that: the system comprises a boiler (1), a turbine high-pressure cylinder (2), a turbine intermediate-pressure cylinder (3), a turbine low-pressure cylinder (4), a condenser (5), a cooling tower (6), a low-pressure heater (7), a deaerator (8), a high-pressure heater (9), a circulating water pump (10), a condensate pump (11), a water feed pump (12), a starting boiler (13), an auxiliary steam header (14) and a temperature and pressure reducing device (15); the steam outlet of the boiler (1) is connected with the steam inlet of a high-pressure steam turbine cylinder (2) through a main steam pipeline (17), the steam outlet of the high-pressure steam turbine cylinder (2) is connected with a reheater of the boiler (1) through a cold re-steam pipeline (19), the steam outlet of the reheater of the boiler (1) is connected with the steam inlet of a medium-pressure steam turbine cylinder (3) through a re-heat steam pipeline (20), the steam outlet of the medium-pressure steam turbine cylinder (3) is connected with the steam inlet of a low-pressure steam turbine cylinder (4) through a medium-low pressure cylinder communication pipeline (24), the steam outlet of the low-pressure steam turbine cylinder (4) is connected to a condenser (5), the circulating water side of the condenser (5) is connected with a cooling tower (6) through a circulating water pump (10), and the condensed water outlet of the condenser (5) is connected to a low-pressure heater (7) through a condensed water pump (11), the steam side of the low-pressure heater (7) is connected with a low-pressure cylinder (4) of the steam turbine through a low-pressure steam extraction pipeline (25), and the drain port of the low-pressure heater (7) is connected with the condenser (5) through a low-pressure drain pipeline (26), a condensed water outlet of the low-pressure heater (7) is connected to a deaerator (8), a steam side of the deaerator (8) is connected with a steam turbine intermediate pressure cylinder (3) through a medium-pressure steam extraction pipeline (23), the water supply outlet of the deaerator (8) is connected to the high-pressure heater (9) through a water supply pump (12), the steam side of the high-pressure heater (9) is connected with a high-pressure cylinder (2) of the steam turbine through a high-pressure steam extraction pipeline (18), and the drain port of the high-pressure heater (9) is connected with the deaerator (8) through a high-pressure drain pipeline (28), a feed water outlet of the high-pressure heater (9) is connected to the boiler (1); a steam inlet at the steam side of the temperature and pressure reducer (15) is connected with a steam extraction main pipe (21) through a temperature and pressure reducer inlet valve (32), a steam extraction valve (22) is installed on the steam extraction main pipe (21), a temperature reduction valve (33) is installed at a temperature reduction water port of the temperature and pressure reducer (15), and a steam outlet at the steam side of the temperature and pressure reducer (15) is connected with a heat consumer (16) through a heat supply pipeline (34); the starting boiler (13) is connected with the auxiliary steam header (14) through a valve (29), one side of the auxiliary steam header (14) is provided with a steam extraction check valve (30), and the steam extraction check valve (30) is provided with a bypass valve (31).
2. Industrial heating system for special cases in thermal power plants according to claim 1, characterized in that: the boiler (1) is an oil boiler, a gas boiler or an electric boiler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120389226.0U CN214891444U (en) | 2021-02-22 | 2021-02-22 | Industrial heat supply system used under special condition of thermal power plant |
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| CN202120389226.0U CN214891444U (en) | 2021-02-22 | 2021-02-22 | Industrial heat supply system used under special condition of thermal power plant |
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| CN214891444U true CN214891444U (en) | 2021-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575944A (en) * | 2022-03-25 | 2022-06-03 | 华电郑州机械设计研究院有限公司 | Power plant cylinder cutting system without modifying middle-low pressure communicating pipe |
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2021
- 2021-02-22 CN CN202120389226.0U patent/CN214891444U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114575944A (en) * | 2022-03-25 | 2022-06-03 | 华电郑州机械设计研究院有限公司 | Power plant cylinder cutting system without modifying middle-low pressure communicating pipe |
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