CN213421484U - Heat exchange energy-saving system of solar thermal coupling thermal power generating unit heat regenerative system - Google Patents
Heat exchange energy-saving system of solar thermal coupling thermal power generating unit heat regenerative system Download PDFInfo
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- CN213421484U CN213421484U CN202022412642.6U CN202022412642U CN213421484U CN 213421484 U CN213421484 U CN 213421484U CN 202022412642 U CN202022412642 U CN 202022412642U CN 213421484 U CN213421484 U CN 213421484U
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Abstract
The utility model discloses a solar photothermal coupling thermal power unit backheating system heat exchange energy-saving system, the outlet of a solar heat collection device is divided into three paths, wherein, the first path is communicated with the inlet of a first circulating pump through the heat release side of a high-heating heat exchanger and the heat release side of a low-heating heat exchanger in a thermal power generation system in sequence, the second path is communicated with the steam inlet of a deaerator in the thermal power generation system, the third path is communicated with the inlet of the first circulating pump through the heat release side of a molten salt heat exchanger, and the outlet of the first circulating pump is communicated with the inlet of the solar heat collection device; the high-temperature molten salt tank is communicated with the low-temperature molten salt tank through the heat absorption side of the molten salt heat exchanger, the system can avoid heating boiler feed water through turbine steam extraction, the coal consumption of the thermal power generating unit is low, and the power generation cost is low.
Description
Technical Field
The utility model belongs to thermal power unit energy saving and consumption reduction field relates to a solar photothermal coupling thermal power unit regenerative system heat transfer economizer system.
Background
With the change of national power policy in recent years, the main functions of the thermal power plant are changed at the same time, and the main power of power supply is changed into the main power of power supply to participate in the deep peak regulation in cooperation with a power grid. Meanwhile, the state has developed a coal control policy in recent years. The opportunities faced by the coal-electricity industry are unprecedented, the coal-electricity technology is developed towards high efficiency, cleanness, flexibility, low carbon and intelligence, and the energy conservation and consumption reduction are expected to become one of the mainstream technologies for newly building a coal-electricity unit and modifying and upgrading the existing unit before and after 2030 years.
However, in the power generation process of the existing thermal power generating unit, steam is extracted through a turbine to heat boiler water supply, so that the power generation efficiency and the power generation amount of the power generating unit are seriously reduced, the power generation coal consumption of the thermal power generating unit is increased, and the power generation cost is higher.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a solar thermal coupling thermal power generating unit backheat system heat transfer economizer system, this system can avoid taking out steam through the turbine and heating the boiler feedwater, and thermal power generating unit's electricity generation coal consumption is lower, and the cost of electricity generation is low.
In order to achieve the purpose, the heat exchange energy-saving system of the regenerative system of the solar thermal coupling thermal power generating unit comprises a thermal power generation system, a solar heat collection device, a first circulating pump, a molten salt heat exchanger, a high-temperature molten salt tank and a low-temperature molten salt tank;
the outlet of the solar heat collection device is divided into three paths, wherein the first path is communicated with the inlet of a first circulating pump through the heat release side of a high-heating heat exchanger and the heat release side of a low-heating heat exchanger in the thermal power generation system in sequence, the second path is communicated with the steam inlet of a deaerator in the thermal power generation system, the third path is communicated with the inlet of the first circulating pump through the heat release side of a molten salt heat exchanger, and the outlet of the first circulating pump is communicated with the inlet of the solar heat collection device;
the high-temperature molten salt tank is communicated with the low-temperature molten salt tank through the heat absorption side of the molten salt heat exchanger.
The thermal power generation system comprises a boiler, a high-pressure turbine, a low-pressure turbine, a condenser, a feed pump, a low-pressure heat exchanger, a deaerator, a high-pressure heat exchanger and a generator;
the outlet of the boiler is communicated with the inlet of the boiler sequentially through a high-pressure turbine, a low-pressure turbine, a condenser, a feed pump, the heat absorption side of a low-pressure heat exchanger, a deaerator and the heat absorption side of a high-pressure heat exchanger, and the generator is coaxially arranged with the low-pressure turbine and the high-pressure turbine.
A first valve is arranged at an outlet of the solar heat collection device, and a second valve is arranged at an inlet of the solar heat collection device;
a third valve is arranged at a steam inlet of the deaerator;
a fourth valve is arranged at the heat release side inlet of the high pressure heater;
a fifth valve and a sixth valve are respectively arranged at the heat absorption side inlet and the heat absorption side outlet of the molten salt heat exchanger;
a seventh valve is arranged between the high-temperature molten salt tank and the molten salt heat exchanger, and an eighth valve is arranged between the molten salt heat exchanger and the low-temperature molten salt tank;
the high-temperature molten salt tank is communicated with the molten salt heat exchanger through the ninth valve and the second circulating pump in sequence;
the system also comprises a tenth valve and a third circulating pump, wherein the molten salt heat exchanger is communicated with the low-temperature molten salt tank through the tenth valve and the third circulating pump in sequence.
The utility model discloses following beneficial effect has:
the heat exchange energy-saving system of the solar thermal coupling thermal power generating unit regenerative system is characterized in that when the unit operates in daytime, high-temperature steam output after heat collection by the solar thermal coupling thermal power generating unit is divided into three paths, wherein one path is used for heating boiler feed water, the second path is used for providing steam for the deaerator, the third path is used for heating low-temperature fused salt so as to avoid steam extraction of the unit to heat boiler feed water and reduce coal consumption for power generation, when the unit operates in evening, the high-temperature fused salt is used for heating water into high-temperature steam, and then the high-temperature fused salt is divided into two paths, wherein one path is used for heating boiler feed water, the other path is used for providing steam for the deaerator so as to avoid air extraction to heat boiler feed water, reduce coal consumption for power generation and improve the power generation amount of the generator simultaneously, and has the advantages of simple system, low, the system with good environmental protection and economic benefits is provided for the problems faced by the existing thermal power generating unit.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is boiler, 2 is high pressure turbine, 3 is low pressure turbine, 4 is the generator, 5 is the agglomerator, 6 is the feed pump, 7 is low heat exchanger, 8 is the oxygen-eliminating device, 9 is high heat exchanger, 10 is solar collector, 11 is first circulating pump, 12 is the fused salt heat exchanger, 13 is high temperature fused salt jar, 14 is low temperature fused salt jar, 15 is first valve, 16 is the fifth valve, 17 is the third valve, 18 is the fourth valve, 19 is the sixth valve, 20 is the second valve, 21 is the seventh valve, 22 is the ninth valve, 23 is the second circulating pump, 24 is the eighth valve, 25 is the tenth valve, 26 is the third circulating pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the heat exchange energy-saving system of the regenerative system of the solar thermal-coupling thermal power generating unit of the present invention includes a thermal power generation system, a solar heat collection device 10, a first circulating pump 11, a molten salt heat exchanger 12, a high-temperature molten salt tank 13, and a low-temperature molten salt tank 14; the outlet of the solar heat collection device 10 is divided into three paths, wherein the first path is communicated with the inlet of a first circulating pump 11 through the heat release side of a high-heating heat exchanger 9 and the heat release side of a low-heating heat exchanger 7 in the thermal power generation system in sequence, the second path is communicated with the steam inlet of a deaerator 8 in the thermal power generation system, the third path is communicated with the inlet of the first circulating pump 11 through the heat release side of a molten salt heat exchanger 12, and the outlet of the first circulating pump 11 is communicated with the inlet of the solar heat collection device 10; the high-temperature molten salt tank 13 is communicated with the low-temperature molten salt tank 14 through the heat absorption side of the molten salt heat exchanger 12.
The thermal power generation system comprises a boiler 1, a high-pressure turbine 2, a low-pressure turbine 3, a agglomerator 5, a feed pump 6, a low-pressure heat exchanger 7, a deaerator 8, a high-pressure heat exchanger 9 and a generator 4; the outlet of the boiler 1 is communicated with the inlet of the boiler 1 through a high-pressure turbine 2, a low-pressure turbine 3, a agglomerator 5, a feed pump 6, the heat absorption side of a low-pressure heat exchanger 7, a deaerator 8 and the heat absorption side of a high-pressure heat exchanger 9 in sequence, and a generator 4 is coaxially arranged with the low-pressure turbine 3 and the high-pressure turbine 2.
A first valve 15 is arranged at the outlet of the solar heat collection device 10, and a second valve 20 is arranged at the inlet of the solar heat collection device 10; a third valve 17 is arranged at a steam inlet of the deaerator 8; a fourth valve 18 is arranged at the heat release side inlet of the high pressure heater 9; a fifth valve 16 and a sixth valve 19 are respectively arranged at the heat absorption side inlet and the heat absorption side outlet of the molten salt heat exchanger 12; a seventh valve 21 is arranged between the high-temperature molten salt tank 13 and the molten salt heat exchanger 12, and an eighth valve 24 is arranged between the molten salt heat exchanger 12 and the low-temperature molten salt tank 14.
The utility model also comprises a ninth valve 22 and a second circulating pump 23, the high-temperature molten salt tank 13 is communicated with the molten salt heat exchanger 12 through the ninth valve 22 and the second circulating pump 23 in sequence; the utility model discloses still include tenth valve 25 and third circulating pump 26, wherein, fused salt heat exchanger 12 is linked together with low temperature fused salt jar 14 through tenth valve 25 and third circulating pump 26 in proper order.
The utility model discloses a concrete working process does:
when the thermal power generating unit operates in the daytime, the first valve 15, the fourth valve 18, the third valve 17, the sixth valve 19, the fifth valve 16 and the second valve 20 are opened, simultaneously, the first circulating pump 11 is started, the high-temperature and high-pressure steam with the temperature of 500 ℃ and the pressure of 8MPa output by the solar heat collection device 10 is divided into three paths, wherein the first path enters a first circulating pump 11 after being released heat through a low heat exchanger 7 and a high heat exchanger 9, the second path enters a deaerator 8 for deaerating and heating, the third path enters a first circulating pump 11 after releasing heat through a molten salt heat exchanger 12, the low-temperature water of 200-250 ℃ output by the first circulating pump 11 enters the solar heat collection device 10 for heat exchange and temperature rise, so that the high-pressure turbine 2 and the low-pressure turbine 3 are prevented from being used for extracting steam to heat water supply, the generating capacity and the generating efficiency of the thermal power generating unit are improved, meanwhile, molten salt output by the low-temperature molten salt tank 14 enters the molten salt heat exchanger 12 to absorb heat and raise temperature, and then enters the high-temperature molten salt tank 13;
when the thermal power generating unit operates at night, the fifth valve 16, the third valve 17, the fourth valve 18 and the sixth valve 19 are opened, the first valve 15 and the second valve 20 are closed, high-temperature molten salt output by the high-temperature molten salt tank 13 enters the molten salt heat exchanger 12 to release heat, then enters the low-temperature molten salt tank 14, high-temperature steam output by the molten salt heat exchanger 12 is divided into two paths, one path of high-temperature steam sequentially releases heat in the high-pressure heat exchanger 9 and the low-pressure heat exchanger 7 to heat water fed by the boiler 1, then enters the molten salt heat exchanger 12, the other path of high-temperature steam enters the deaerator 8 to deaerate and heat water fed, and in the process, the high-temperature molten salt stored in the high-temperature molten salt tank 13 is used for releasing heat to heat water fed by the boiler 1, steam extraction by a steam turbine is avoided for heating, and the power generation amount.
Claims (9)
1. The heat exchange energy-saving system of the regenerative system of the solar thermal-coupled thermal power generating unit is characterized by comprising a thermal power generation system, a solar heat collection device (10), a first circulating pump (11), a molten salt heat exchanger (12), a high-temperature molten salt tank (13) and a low-temperature molten salt tank (14);
the outlet of the solar heat collection device (10) is divided into three paths, wherein the first path is communicated with the inlet of a first circulating pump (11) through the heat release side of a high-heat exchanger (9) and the heat release side of a low-heat exchanger (7) in the thermal power generation system in sequence, the second path is communicated with the steam inlet of a deaerator (8) in the thermal power generation system, the third path is communicated with the inlet of the first circulating pump (11) through the heat release side of a molten salt heat exchanger (12), and the outlet of the first circulating pump (11) is communicated with the inlet of the solar heat collection device (10);
the high-temperature molten salt tank (13) is communicated with the low-temperature molten salt tank (14) through the heat absorption side of the molten salt heat exchanger (12).
2. The heat exchange energy-saving system of the regenerative system of the solar thermal-coupled thermal power generating unit according to claim 1, wherein the thermal power generating system comprises a boiler (1), a high-pressure turbine (2), a low-pressure turbine (3), a condenser (5), a water feeding pump (6), a low-pressure heat exchanger (7), a deaerator (8), a high-pressure heat exchanger (9) and a generator (4);
the outlet of the boiler (1) is communicated with the inlet of the boiler (1) sequentially through a high-pressure turbine (2), a low-pressure turbine (3), a condenser (5), a water feeding pump (6), the heat absorption side of a low-pressure heat exchanger (7), a deaerator (8) and the heat absorption side of a high-pressure heat exchanger (9), and a generator (4) is coaxially arranged with the low-pressure turbine (3) and the high-pressure turbine (2).
3. The heat exchange and energy saving system of the regenerative system of the solar thermal-coupling thermal power generating unit according to claim 2, wherein a first valve (15) is arranged at an outlet of the solar thermal collection device (10), and a second valve (20) is arranged at an inlet of the solar thermal collection device (10).
4. The heat exchange and energy saving system of the regenerative system of the solar thermal-coupled thermal power generating unit according to claim 3, wherein a third valve (17) is arranged at a steam inlet of the deaerator (8).
5. The heat exchange and energy saving system of the regenerative system of the solar thermal-coupled thermal power generating unit according to claim 4, wherein a fourth valve (18) is arranged at a heat release side inlet of the high-pressure heater exchanger (9).
6. The heat exchange and energy saving system of the regenerative system of the solar thermal-coupling thermal power generating unit according to claim 5, wherein a fifth valve (16) and a sixth valve (19) are respectively arranged at an inlet of a heat absorption side and an outlet of the heat absorption side of the molten salt heat exchanger (12).
7. The heat exchange and energy saving system of the regenerative system of the solar thermal-coupling thermal power generating unit according to claim 6, wherein a seventh valve (21) is arranged between the high-temperature molten salt tank (13) and the molten salt heat exchanger (12), and an eighth valve (24) is arranged between the molten salt heat exchanger (12) and the low-temperature molten salt tank (14).
8. The heat exchange and energy saving system of the regenerative system of the solar thermal-coupling thermal power generating unit according to claim 7, further comprising a ninth valve (22) and a second circulating pump (23), wherein the high-temperature molten salt tank (13) is communicated with the molten salt heat exchanger (12) through the ninth valve (22) and the second circulating pump (23) in sequence.
9. The heat exchange and energy saving system of the regenerative system of the solar thermal-coupling thermal power generating unit according to claim 8, further comprising a tenth valve (25) and a third circulating pump (26), wherein the molten salt heat exchanger (12) is communicated with the low-temperature molten salt tank (14) through the tenth valve (25) and the third circulating pump (26) in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022412642.6U CN213421484U (en) | 2020-10-26 | 2020-10-26 | Heat exchange energy-saving system of solar thermal coupling thermal power generating unit heat regenerative system |
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| CN202022412642.6U CN213421484U (en) | 2020-10-26 | 2020-10-26 | Heat exchange energy-saving system of solar thermal coupling thermal power generating unit heat regenerative system |
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| CN202022412642.6U Active CN213421484U (en) | 2020-10-26 | 2020-10-26 | Heat exchange energy-saving system of solar thermal coupling thermal power generating unit heat regenerative system |
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