CN218883946U - Solar coal-fired coupling auxiliary industrial steam supply cogeneration system - Google Patents
Solar coal-fired coupling auxiliary industrial steam supply cogeneration system Download PDFInfo
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- CN218883946U CN218883946U CN202223423915.2U CN202223423915U CN218883946U CN 218883946 U CN218883946 U CN 218883946U CN 202223423915 U CN202223423915 U CN 202223423915U CN 218883946 U CN218883946 U CN 218883946U
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Abstract
The utility model relates to a complementary electricity generation technical field of multipotency source provides a supplementary industry of coal-fired coupling of solar energy supplies vapour cogeneration system, include: a coal-fired power generating unit thermodynamic system and an auxiliary industrial steam supply system coupled with solar energy. According to the system, the solar heat collector is used for heating the molten salt, the high-temperature molten salt flows into the steam generator and heats the feed water to generate steam, the heated steam enters the thermodynamic system of the coal-fired generator set to do work, the feed water flow entering the boiler is reduced when the power generation power is constant, and the coal consumption of the coal-fired generator set is reduced; fused salt behind the steam generator can also flow into fused salt feedwater heat exchanger and continue to heat the feedwater, heats the feedwater to higher temperature for the feedwater temperature who gets into the boiler rises, and the fuel quantity that the boiler heating needs reduces, reduces coal-fired unit's coal consumption. So set up for solar-thermal power generation system and coal-fired electricity generation or combined heat and power generation system can satisfy safe and economic's performance requirement, can satisfy industry steam supply demand in a flexible way simultaneously.
Description
Technical Field
The utility model relates to a complementary electricity generation technical field of multipotency source, concretely relates to supplementary industry of coal-fired coupling of solar energy supplies vapour cogeneration system.
Background
Renewable energy sources such as solar energy, wind energy and the like have time-varying characteristics, and large-scale photovoltaic and wind energy power generation grid connection can cause power grid fluctuation and is not beneficial to stable operation of a power grid. With the rapid development of renewable energy technology, thermal power generating units need to improve flexibility and economy, respond to power grid instructions more rapidly, adapt to the operating environment with frequent peak shaving and frequency modulation, and meanwhile, cogeneration units still need to meet the industrial steam supply requirement; the photo-thermal generator set needs to reduce the power generation cost and simultaneously operates safely and efficiently under different solar radiation conditions, so that the power supply stability of a power grid is ensured.
However, at present, no reasonable solution is available to enable the photo-thermal power generation system and the coal-fired power generation or cogeneration system to meet the performance requirements of safety and economy.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in that there is not reasonable solution at present to make solar-thermal power generation system and coal-fired electricity generation or combined heat and power generation system can satisfy safe economic performance requirement to a supplementary industry of coal-fired coupling of solar energy supplies vapour combined heat and power generation system is provided.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a solar energy coal-fired coupling auxiliary industrial steam supply cogeneration system, comprising: the thermodynamic system of the coal-fired generator set at least comprises a boiler and a molten salt feed water heat exchanger, wherein a feed water inlet of the boiler is communicated with a feed water outlet of the molten salt feed water heat exchanger, and a steam outlet of the boiler is communicated with the feed water inlet of the molten salt feed water heat exchanger; the auxiliary industrial steam supply system coupled with the solar energy at least comprises a solar heat collector, a steam generator and an industrial steam supply header, wherein a water supply outlet of the molten salt water supply heat exchanger is communicated with a water supply inlet of the steam generator; a molten salt inlet of the molten salt feedwater heat exchanger is communicated with a molten salt outlet of the steam generator; the molten salt outlet of the molten salt water supply heat exchanger is communicated with the molten salt inlet of the solar heat collector; the molten salt outlet of the solar heat collector is communicated with the molten salt inlet of the steam generator; the steam outlet of the steam generator is communicated with the steam outlet of the boiler; and the industrial steam supply header is communicated with a steam outlet of the steam generator and a steam outlet of the boiler.
Furthermore, the thermodynamic system of the coal-fired power generating unit also comprises a high-pressure cylinder of the steam turbine, a low-pressure cylinder of the steam turbine, a condenser, a condensate pump, a low-pressure heater, a deaerator, a feed pump and a high-pressure heater; the superheated steam outlet of the boiler is communicated with the inlet of the high-pressure cylinder of the steam turbine; the steam outlet of the high-pressure cylinder of the steam turbine is communicated with the reheat steam inlet of the boiler through a pipeline; a reheat steam outlet of the boiler is communicated with a steam inlet of a low pressure cylinder in the steam turbine; a first-stage steam extraction outlet of the high-pressure cylinder of the steam turbine is communicated with a steam inlet of the high-pressure heater through a pipeline; a first-stage steam extraction outlet of the low-pressure cylinder in the steam turbine is communicated with a steam inlet of the deaerator through a pipeline, and a second-stage steam extraction outlet of the low-pressure cylinder in the steam turbine is communicated with a steam inlet of the low-pressure heater through a pipeline; the water working medium outlet of the deaerator is communicated with the high-pressure heater through the water feeding pump; the water supply outlet of the high-pressure heater is communicated with the water supply inlet of the molten salt water supply heat exchanger; a steam outlet of the low-pressure cylinder in the steam turbine is communicated with a steam inlet of the condenser; the water working medium outlet of the condenser is communicated with the water working medium inlet of the low-pressure heater through the condensate pump; and the water medium outlet of the low-pressure heater is communicated with the water medium inlet of the deaerator.
Further, the solar energy coupling auxiliary industrial steam supply system further comprises a cold molten salt tank and a cold molten salt pump; a molten salt outlet of the molten salt water supply heat exchanger is communicated with a molten salt inlet of the cold molten salt tank through a pipeline; and a molten salt outlet of the cold molten salt tank is communicated with a molten salt inlet of the solar heat collector through the cold molten salt pump.
Further, the auxiliary industrial steam supply system coupled with solar energy further comprises a hot-melt salt tank and a hot-melt salt pump; the molten salt outlet of the solar heat collector is communicated with the molten salt inlet of the hot-melt salt tank; and a molten salt outlet of the hot-melt salt tank is communicated with a molten salt inlet of the steam generator through the hot-melt salt pump.
Furthermore, the auxiliary industrial steam supply system coupled with the solar energy further comprises an industrial air supply regulating valve, a cold reheat steam extraction valve, a reheat steam mixing regulating valve and a hot reheat steam extraction valve; the industrial air supply regulating valve is arranged on a pipeline between the steam generator and the industrial steam supply header; the cold reheating steam extraction valve is arranged on a pipeline between a steam outlet of the high-pressure cylinder of the steam turbine and a steam inlet of the industrial steam supply header; the reheat steam mixing adjusting valve is arranged on a pipeline between a steam outlet of the steam generator and a steam inlet of a low-pressure cylinder in the steam turbine; the hot reheat steam extraction valve is arranged on a pipeline between a reheat steam outlet of the boiler and a steam inlet of the industrial steam supply header.
Further, the auxiliary industrial steam supply system coupled with solar energy also comprises a solar energy water supply regulating valve; the solar water supply regulating valve is arranged on a pipeline between a water supply outlet of the molten salt water supply heat exchanger and a water supply inlet of the steam generator.
Further, the auxiliary industrial steam supply system coupled with the solar energy further comprises a molten salt regulating valve; the molten salt regulating valve is arranged on a pipeline between a molten salt inlet of the molten salt water supply heat exchanger and a molten salt outlet of the solar heat collector.
Further, the working temperature range of the molten salt adopted in the thermodynamic system of the coal-fired power generating set and the auxiliary industrial steam supply system coupled with the solar energy is 180-550 ℃.
Further onThe molten salt used in the thermodynamic system of the coal-fired power generating unit and the auxiliary industrial steam supply system coupled with solar energy is 60 percent of NaNO 3 +40％KNO 3 。
The utility model discloses technical scheme has following advantage:
the utility model provides a supplementary industry of coal-fired coupling of solar energy supplies vapour cogeneration of heat system, through solar collector heating fused salt, high temperature fused salt flows into steam generator, heats the feedwater and produces steam, and the steam that adds heats gets into coal-fired generating set thermodynamic system and does work, has reduced the feedwater flow that gets into the boiler when the generating power is certain, has practiced thrift the required fuel quantity of coal-fired unit to reduce the coal consumption of coal-fired unit; molten salt after passing through the steam generator can also flow into the molten salt feedwater heat exchanger to continue to heat feedwater, and the feedwater is heated to a higher temperature, so that the temperature of the feedwater entering the boiler is increased, the fuel quantity required by the boiler heating is reduced, and the coal consumption of the coal-fired unit is reduced. So set up for solar-thermal power generation system and coal-fired electricity generation or combined heat and power generation system can satisfy safe economic performance requirement.
The utility model provides a supplementary industry of coal-fired coupling of solar energy supplies vapour combined heat and power system adjusts through the cooperation of industry tonifying qi governing valve, cold reheat steam extraction valve, hot reheat steam extraction valve, reheat steam mixing control valve and realizes the high-efficient utilization of solar energy, satisfies the industry in a flexible way and supplies vapour. When the steam supply demand of the industrial steam network is increased, the opening degrees of the industrial air supply adjusting valve, the cold reheat steam extraction valve and the hot reheat steam extraction valve can be increased, and the opening degree of the reheat steam mixing adjusting valve is reduced, so that the flow entering the industrial steam network is increased, and the user demand is flexibly met. When the steam supply demand of the industrial steam network is reduced, the extraction steam from the reheating cold end and the reheating hot section can be reduced, and the steam generated by the steam generator can meet the steam supply demand of the industrial steam network.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a solar energy and coal-fired coupling auxiliary industrial steam supply cogeneration system in an embodiment of the invention.
Description of reference numerals:
1. a boiler; 2. a high-pressure cylinder of the steam turbine; 3. a steam turbine medium-low pressure cylinder; 4. a condenser; 5. a condensate pump; 6. a low pressure heater; 7. a deaerator; 8. a feed pump; 9. a high pressure heater; 10. a molten salt feedwater heat exchanger; 11. a cold molten salt tank; 12. a cold molten salt pump; 13. a solar heat collector; 14. a hot-melt salt tank; 15. a hot-melt salt pump; 16. a steam generator; 17. a solar water supply regulating valve; 18. a molten salt regulating valve; 19. industrial air supply regulating valve; 20. a cold reheat steam extraction valve; 21. an industrial steam supply header; 22. a reheat steam mixing regulating valve; 23. a hot reheat steam extraction valve; 24. an industrial steam net.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Fig. 1 is the utility model provides an embodiment of the supplementary industry of solar energy coal-fired coupling supplies vapour combined heat and power generation system's schematic diagram, as shown in fig. 1, this embodiment provides a supplementary industry of solar energy coal-fired coupling supplies vapour combined heat and power generation system, includes: the thermodynamic system of the coal-fired power generating set at least comprises a boiler 1 and a molten salt feed water heat exchanger 10, wherein a feed water inlet of the boiler 1 is communicated with a feed water outlet of the molten salt feed water heat exchanger 10, and a steam outlet of the boiler 1 is communicated with a feed water inlet of the molten salt feed water heat exchanger 10; the auxiliary industrial steam supply system coupled with the solar energy at least comprises a solar heat collector 13, a steam generator 16 and an industrial steam supply header 21, wherein a feed water outlet of the molten salt feed water heat exchanger 10 is communicated with a feed water inlet of the steam generator 16; the molten salt inlet of the molten salt feedwater heat exchanger 10 is communicated with the molten salt outlet of the steam generator 16; the molten salt outlet of the molten salt feedwater heat exchanger 10 is communicated with the molten salt inlet of the solar heat collector 13; the molten salt outlet of the solar heat collector 13 is communicated with the molten salt inlet of the steam generator 16; the steam outlet of the steam generator 16 is communicated with the steam outlet of the boiler 1; the industrial steam supply header 21 is communicated with both the steam outlet of the steam generator 16 and the steam outlet of the boiler 1.
According to the solar coal-fired coupling auxiliary industrial steam-supply cogeneration system provided by the embodiment, the solar heat collector 13 is used for heating the molten salt, the high-temperature molten salt flows into the steam generator 16 to heat the feed water to generate steam, the heated steam enters the thermodynamic system of the coal-fired generator set to do work, the feed water flow entering the boiler 1 is reduced when the power generation power is constant, the fuel quantity required by the coal-fired generator set is saved, and the coal consumption of the coal-fired generator set is reduced; the molten salt passing through the steam generator 16 can flow into the molten salt feedwater heat exchanger 10 to continuously heat the feedwater, and the feedwater is heated to a higher temperature, so that the temperature of the feedwater entering the boiler 1 is increased, the fuel quantity required by the boiler 1 for heating is reduced, and the coal consumption of the coal-fired unit is reduced. So set up for solar-thermal power generation system and coal-fired electricity generation or combined heat and power generation system can satisfy safe economic performance requirement.
The thermodynamic system of the coal-fired power generating unit further comprises a high-pressure turbine cylinder 2, a low-pressure turbine cylinder 3, a condenser 4, a condensate pump 5, a low-pressure heater 6, a deaerator 7, a water feed pump 8 and a high-pressure heater 9; the superheated steam outlet of the boiler 1 is communicated with the inlet of the high-pressure cylinder 2 of the steam turbine; the steam outlet of the steam turbine high-pressure cylinder 2 is communicated with the reheat steam inlet of the boiler 1 through a pipeline; a reheat steam outlet of the boiler 1 is communicated with a steam inlet of the low pressure cylinder 3 in the steam turbine; a first-stage steam extraction outlet of the steam turbine high-pressure cylinder 2 is communicated with a steam inlet of the high-pressure heater 9 through a pipeline; a first-stage steam extraction outlet of the low-pressure steam turbine cylinder 3 is communicated with a steam inlet of the deaerator 7 through a pipeline, and a second-stage steam extraction outlet of the low-pressure steam turbine cylinder 3 is communicated with a steam inlet of the low-pressure heater 6 through a pipeline; the water working medium outlet of the deaerator 7 is communicated with the high-pressure heater 9 through the water feeding pump 8; a water supply outlet of the high-pressure heater 9 is communicated with a water supply inlet of the molten salt water supply heat exchanger 10; a steam outlet of the low pressure cylinder 3 in the steam turbine is communicated with a steam inlet of the condenser 4; the water medium outlet of the condenser 4 is communicated with the water medium inlet of the low-pressure heater 6 through the condensate pump 5; and a water working medium outlet of the low-pressure heater 6 is communicated with a water working medium inlet of the deaerator 7.
The solar-coupled auxiliary industrial steam supply system further comprises a cold molten salt tank 11 and a cold molten salt pump 12; the molten salt outlet of the molten salt water supply heat exchanger 10 is communicated with the molten salt inlet of the cold molten salt tank 11 through a pipeline; the molten salt outlet of the cold molten salt tank 11 is communicated with the molten salt inlet of the solar heat collector 13 through the cold molten salt pump 12.
The solar-coupled auxiliary industrial steam supply system further comprises a hot-melt salt tank 14 and a hot-melt salt pump 15; the molten salt outlet of the solar heat collector 13 is communicated with the molten salt inlet of the hot-melt salt tank 14; the molten salt outlet of the hot-melt salt tank 14 is communicated with the molten salt inlet of the steam generator 16 through the hot-melt salt pump 15.
The auxiliary industrial steam supply system coupled with the solar energy further comprises an industrial air supply adjusting valve 19, a cold reheat steam extraction valve 20, a reheat steam mixing adjusting valve 22 and a hot reheat steam extraction valve 23; the industrial air supply regulating valve 19 is arranged on a pipeline between the steam generator 16 and the industrial steam supply header 21; the cold reheat steam extraction valve 20 is arranged on a pipeline between a steam outlet of the steam turbine high-pressure cylinder 2 and a steam inlet of the industrial steam supply header 21; the reheat steam mixing adjusting valve 22 is arranged on a pipeline between a steam outlet of the steam generator 16 and a steam inlet of the low pressure steam cylinder 3 in the steam turbine; the hot reheat steam extraction valve 23 is provided on a pipe between a reheat steam outlet of the boiler 1 and a steam inlet of the industrial steam supply header 21.
Wherein, the auxiliary industrial steam supply system coupled with the solar energy also comprises a solar energy water supply regulating valve 17; the solar feedwater regulating valve 17 is disposed on a pipeline between the feedwater outlet of the molten salt feedwater heat exchanger 10 and the feedwater inlet of the steam generator 16.
Wherein the auxiliary industrial steam supply system coupled with solar energy further comprises a molten salt regulating valve 18; the molten salt regulating valve 18 is arranged on a pipeline between the molten salt inlet of the molten salt feedwater heat exchanger 10 and the molten salt outlet of the solar heat collector 13.
Wherein the working temperature range of the molten salt adopted in the thermodynamic system of the coal-fired power generating unit and the auxiliary industrial steam supply system coupled with the solar energy is 180-550 ℃.
Wherein the molten salt employed in the coal-fired power plant thermodynamic system and the solar-coupled auxiliary industrial steam supply system is a binary salt, e.g., 60% NaNO 3 +40％KNO 3 。
The working process of the circulating working medium in the system comprises the following steps:
condensed water in a condenser 4 enters a low-pressure heater 6 for heating through a condensed water pump 5, and then is heated through a deaerator 7, feed water flows out of a feed water outlet of the deaerator 7, the feed water sequentially enters a high-pressure heater 9 and a molten salt feed water heat exchanger 10 for heating, the feed water at an outlet of the molten salt feed water heat exchanger 10 is divided into two parts, one part of the feed water enters a steam generator 16 and is heated by hot molten salt to generate steam, the other part of the feed water enters a boiler 1 for heating to generate steam, the steam enters a steam turbine high-pressure cylinder 2 for acting, exhaust steam of the steam turbine high-pressure cylinder 2 enters the boiler 1 for generating reheat steam, the reheat steam can be mixed with the steam generated by the steam generator 16, the mixed steam enters a steam turbine low-pressure cylinder 3 for acting, and the exhaust steam of the steam turbine low-pressure cylinder 3 enters the condenser 4 for cooling; the steam generated by the steam generator 16 enters an industrial steam supply header 21 through an industrial air supply adjusting valve 19, and the steam supplied to an industrial steam network 24 by the industrial steam supply header 21 is composed of cold reheat steam and hot reheat steam which are extracted through a cold reheat steam extraction valve 20 and a hot reheat steam extraction valve 23; cold molten salt in the cold molten salt tank 11 enters a solar heat collector 13 for heating through a cold molten salt pump 12, and then directly enters a hot molten salt tank 14 for storage or enters a molten salt water supply heat exchanger 10 for heating water supply according to the temperature; the hot molten salt in the hot molten salt tank 14 enters the steam generator 16 through the hot molten salt pump 15 to release heat and heat the feed water, the molten salt after heat release continues to enter the molten salt feed water heat exchanger 10 to heat the feed water, and the molten salt after heat release flows into the cold molten salt tank 11.
In conclusion, the solar coal-fired coupling auxiliary industrial steam supply cogeneration system realizes coupling of coal-fired power generation, photo-thermal power generation and industrial steam supply, realizes energy cascade utilization, and the solar heat collector 13 absorbs solar energy to heat molten salt and then generates steam through the steam generator 16, so that on one hand, steam can be supplied to the industrial steam network 24, on the other hand, energy consumption of the coal-fired unit can be reduced, and the solar heat collector and the industrial steam network 24 together assist the coal-fired unit in peak regulation and frequency modulation, thereby improving operation economy.
According to the solar coal-fired coupling auxiliary industrial steam supply cogeneration system, the solar heat collector 13 heats the molten salt and stores the molten salt in the hot-melt salt tank 14, the hot-melt salt tank 14 enables the high-temperature molten salt to flow into the steam generator 16 through the hot-melt salt pump 15 to heat the feed water to generate steam, the heated steam enters the steam turbine middle and low pressure cylinder 3 through the reheated steam mixing regulating valve 22 to do work, when the generated power is constant, the feed water flow entering the boiler 1 is reduced, the fuel quantity required by a coal-fired unit is saved, and therefore the coal consumption of the coal-fired unit is reduced; the molten salt passing through the steam generator 16 can also flow into the molten salt feedwater heat exchanger 10 to continuously heat the feedwater, and the molten salt feedwater heat exchanger 10 is connected with the high-pressure heater 9 in series and can further heat the feedwater to a higher temperature, so that the temperature of the feedwater entering the boiler 1 is increased, the fuel quantity required by the boiler 1 for heating is reduced, and the coal consumption of a coal-fired unit is reduced; when the illumination is insufficient, if the fused salt heated by the solar heat collector 13 does not reach the temperature required by the hot-melt salt tank 14, the fused salt can directly enter the fused salt water-feeding heat exchanger 10 to heat the feed water, and the feed water flows into the cold-melt salt tank 11 after releasing heat; the solar thermal power generation and coal-fired power generation system can be flexibly coupled in a reheating steam hot section and a water supply section, so that the energy utilization rate is improved, and the coal consumption of a coal-fired unit is reduced.
The solar coal-fired coupling auxiliary industrial steam supply cogeneration system in the application adopts the cooperation of the industrial air supply adjusting valve 19, the cold reheat steam extraction valve 20, the hot reheat steam extraction valve 23, the reheat steam mixing adjusting valve 22 and the industrial steam supply header 21 to adjust the steam generated by the solar energy and coal-fired power generation system, and flexibly meets the requirements of the industrial steam supply and the coal-fired machine set for rapid load change. When the system needs to rapidly load up, the opening degree of the reheat steam mixing adjusting valve 22 is increased, and the steam flow entering the low pressure cylinder 3 of the steam turbine to do work is rapidly increased, so that the requirement of variable load rate is met. When the system needs to rapidly reduce the load, the cold reheat steam extraction valve and the hot reheat steam regulating valve are opened, part of reheat steam is supplied to the industrial steam network 24, and the steam flow entering the low-pressure cylinder 3 of the steam turbine to do work is reduced, so that the requirement of the system on rapidly reducing the load is met. When the steam supply demand of the industrial steam network 24 is increased, the opening degrees of the industrial air supply adjusting valve 19, the cold reheat steam extraction valve 20 and the hot reheat steam extraction valve 23 can be increased, and the opening degree of the reheat steam mixing adjusting valve 22 is reduced, so that the flow entering the industrial steam network 24 is increased, and the user demand is flexibly met. When the steam supply requirement of the industrial steam network 24 is reduced, the steam extraction from the reheating cold end and the reheating hot end can be reduced, and the steam generated by the steam generator 16 can meet the steam supply requirement of the industrial steam network 24.
The solar coal-fired coupling auxiliary industrial steam supply cogeneration system can run safely and stably under the condition of solar radiation intensity fluctuation, and the flexibility of a unit is improved. When the solar radiation intensity is suddenly increased, the flow of the heatable molten salt in the solar heat collector 13 is increased, and the hot molten salt tank 14 can store redundant energy to maintain the balance of the system; adjust hot melt salt pump 15 and make the hot melt salt flow who gets into steam generator 16 increase, give water regulating valve 17 aperture through the increase solar energy, increase the feedwater flow that gets into steam generator 16 to the steam flow that steam generator 16 produced increases, through the feedwater flow that reduces boiler 1 and get into boiler 1, maintains the steady operation of system. When the solar radiation intensity is suddenly reduced, the hot-melt salt stored in the hot-melt salt tank 14 can slow down the change of the flow of the hot-melt salt entering the steam generator 16, meanwhile, the opening degree of the solar water supply regulating valve 17 is reduced, and the opening degrees of the industrial air supply regulating valve 19, the cold reheat steam extraction valve 20 and the hot reheat steam extraction valve 23 are regulated, so that the safe and stable operation of the system can be realized.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (9)
1. A solar energy coal-fired coupling auxiliary industrial steam supply cogeneration system, characterized by comprising:
the thermodynamic system of the coal-fired power generating set at least comprises a boiler and a molten salt feed water heat exchanger, wherein a feed water inlet of the boiler is communicated with a feed water outlet of the molten salt feed water heat exchanger, and a steam outlet of the boiler is communicated with the feed water inlet of the molten salt feed water heat exchanger;
the auxiliary industrial steam supply system coupled with solar energy at least comprises a solar heat collector, a steam generator and an industrial steam supply header, wherein a water supply outlet of the molten salt water supply heat exchanger is communicated with a water supply inlet of the steam generator; a molten salt inlet of the molten salt water supply heat exchanger is communicated with a molten salt outlet of the steam generator; the molten salt outlet of the molten salt water supply heat exchanger is communicated with the molten salt inlet of the solar heat collector; the molten salt outlet of the solar heat collector is communicated with the molten salt inlet of the steam generator; the steam outlet of the steam generator is communicated with the steam outlet of the boiler; and the industrial steam supply header is communicated with a steam outlet of the steam generator and a steam outlet of the boiler.
2. The solar energy coal-fired coupling auxiliary industrial steam supply cogeneration system of heat and power as claimed in claim 1, wherein the coal-fired power generation unit thermodynamic system further comprises a steam turbine high pressure cylinder, a steam turbine medium and low pressure cylinder, a condenser, a condensate pump, a low pressure heater, a deaerator, a feed pump and a high pressure heater;
the superheated steam outlet of the boiler is communicated with the inlet of the high-pressure cylinder of the steam turbine; the steam outlet of the high-pressure cylinder of the steam turbine is communicated with the reheat steam inlet of the boiler through a pipeline; a reheat steam outlet of the boiler is communicated with a steam inlet of the low pressure cylinder in the steam turbine; a first-stage steam extraction outlet of the high-pressure cylinder of the steam turbine is communicated with a steam inlet of the high-pressure heater through a pipeline; a first-stage steam extraction outlet of the low pressure cylinder in the steam turbine is communicated with a steam inlet of the deaerator through a pipeline, and a second-stage steam extraction outlet of the low pressure cylinder in the steam turbine is communicated with a steam inlet of the low pressure heater through a pipeline; the water working medium outlet of the deaerator is communicated with the high-pressure heater through the water feeding pump; the water supply outlet of the high-pressure heater is communicated with the water supply inlet of the molten salt water supply heat exchanger; a steam outlet of the low-pressure cylinder in the steam turbine is communicated with a steam inlet of the condenser; the water working medium outlet of the condenser is communicated with the water working medium inlet of the low-pressure heater through the condensate pump; and the water working medium outlet of the low-pressure heater is communicated with the water working medium inlet of the deaerator.
3. The solar coal-fired coupled auxiliary industrial steam-supplied combined heat and power generation system of claim 2, wherein the solar coupled auxiliary industrial steam-supplied system further comprises a cold molten salt tank and a cold molten salt pump;
a molten salt outlet of the molten salt water-feeding heat exchanger is communicated with a molten salt inlet of the cold molten salt tank through a pipeline; and a molten salt outlet of the cold molten salt tank is communicated with a molten salt inlet of the solar heat collector through the cold molten salt pump.
4. The solar coal-fired coupled auxiliary industrial steam supply cogeneration system of claim 2, wherein the solar coupled auxiliary industrial steam supply system further comprises a hot-melt salt tank and a hot-melt salt pump;
the molten salt outlet of the solar heat collector is communicated with the molten salt inlet of the hot-melt salt tank; and a molten salt outlet of the hot-melt salt tank is communicated with a molten salt inlet of the steam generator through the hot-melt salt pump.
5. The solar coal-fired coupled auxiliary industrial steam-supplied combined heat and power generation system of claim 2, wherein the solar coupled auxiliary industrial steam-supplied system further comprises an industrial air make-up regulating valve, a cold reheat steam extraction valve, a reheat steam mixing regulating valve, and a hot reheat steam extraction valve;
the industrial air supply regulating valve is arranged on a pipeline between the steam generator and the industrial steam supply header;
the cold reheating steam extraction valve is arranged on a pipeline between a steam outlet of the high-pressure cylinder of the steam turbine and a steam inlet of the industrial steam supply header;
the reheat steam mixing adjusting valve is arranged on a pipeline between a steam outlet of the steam generator and a steam inlet of the low pressure cylinder in the steam turbine;
the hot reheat steam extraction valve is arranged on a pipeline between a reheat steam outlet of the boiler and a steam inlet of the industrial steam supply header.
6. The solar coal-fired coupled auxiliary industrial steam-supplied combined heat and power system of claim 2, wherein the solar coupled auxiliary industrial steam supply system further comprises a solar feedwater regulating valve;
the solar water supply regulating valve is arranged on a pipeline between a water supply outlet of the molten salt water supply heat exchanger and a water supply inlet of the steam generator.
7. The solar coal-fired coupled auxiliary industrial steam-supplied combined heat and power generation system of claim 5, wherein the solar coupled auxiliary industrial steam-supplied system further comprises a molten salt regulating valve;
the molten salt adjusting valve is arranged on a pipeline between a molten salt inlet of the molten salt feedwater heat exchanger and a molten salt outlet of the solar heat collector.
8. The solar energy coal-fired coupling auxiliary industrial steam supply cogeneration system of claim 1, wherein the operating temperature range of the molten salt adopted in the thermal system of the coal-fired power generation unit and the auxiliary industrial steam supply system coupled with solar energy is 180 ℃ to 550 ℃.
9. The solar coal-fired coupled auxiliary industrial steam-supplied combined heat and power generation system according to claim 1,
adopted in thermodynamic system of coal-fired generator set and auxiliary industrial steam supply system coupled with solar energyThe molten salt of (B) is 60% NaNO 3 +40％KNO 3 。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223423915.2U CN218883946U (en) | 2022-12-16 | 2022-12-16 | Solar coal-fired coupling auxiliary industrial steam supply cogeneration system |
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