CN206785574U - Direct contact heat transfer tower type solar energy thermal power generation station system - Google Patents

Abstract

The utility model discloses a direct contact heat exchange tower type solar thermal power station system, which belongs to the field of solar thermal utilization. The system includes heliostat field, heat absorber, molten salt heat storage and heat release subsystem, turbine, generator, preheater, cooler, and compressor. The solar light is reflected into the heat absorber by the heliostat field. After the gas is compressed, high-temperature and high-pressure gas is generated through the heat absorber to drive the turbine to do power generation. According to the difference in the intensity of solar energy, combined with the molten salt heat storage and heat release subsystem Adjust working methods. The utility model utilizes the characteristics of low vapor pressure of molten salt and wide operating temperature range, adopts the direct contact heat exchange mode between gas and molten salt, replaces the traditional partition heat exchange, can improve the heat exchange efficiency, reduce the heat exchange temperature difference, and at the same time, the gas is The working medium avoids the large-scale flowing corrosion and freezing blockage of molten salt in the pipeline; at the same time, it can realize continuous and stable operation under different solar intensities and provide stable high-quality electric energy.

Description

Direct contact heat exchange tower solar thermal power plant system

technical field

The utility model designs a direct contact heat exchange tower type solar thermal power station system, which belongs to the field of solar thermal utilization.

Background technique

In today's energy crisis and increasingly serious environmental problems, the development and utilization of pollution-free renewable energy is imminent. Solar energy is a safe, clean and renewable green energy. The utilization of solar energy mainly includes photothermal conversion and photoelectric conversion. Among them, solar thermal power generation refers to the use of large-scale heliostats to collect solar thermal energy, generate steam through heat exchange devices, and combine traditional power generation processes to generate electricity. Due to the intermittent nature of solar energy, the existing solar thermal power plant system is also equipped with a low-cost large-scale thermal storage system to provide stable and high-quality electrical energy. Molten salt is widely used in heat storage systems due to its wide temperature range, large heat capacity, low vapor pressure, service life and price, which are superior to other heat storage media such as heat transfer oil.

Direct contact heat exchange means that the two media participating in the heat exchange exchange heat in a direct contact manner, which can be the same medium or different, but the two media must be easily separated. Compared with the traditional heat exchange method, direct contact heat exchange has high heat exchange efficiency, small heat transfer temperature difference, and is not easy to corrode and scale. Therefore, it is widely used in seawater desalination, geothermal power generation, medium and low temperature heat source recovery, and wastewater treatment.

In the existing solar thermal power stations, molten salt is mostly used as heat collection and storage medium, combined with steam power cycle to generate electricity, and the heat exchange device adopts a partitioned heat exchanger, but the heat transfer resistance is large and the heat transfer efficiency is not high, and Corrosion and freezing will occur when molten salt flows in the pipeline in a large area. How to solve the low heat transfer efficiency and avoid the safety hazards in the use of molten salt is an urgent problem to be solved in solar thermal power generation technology.

Utility model content

The utility model utilizes the characteristics of low vapor pressure of molten salt and wide operating temperature range, adopts the direct contact heat exchange mode between gas and molten salt, replaces the traditional partition heat exchange, can improve heat exchange efficiency, reduce heat exchange temperature difference, and at the same time, the gas is The working medium avoids the large-scale flow corrosion and freezing blockage of molten salt in the pipeline. The gas can be air, nitrogen and carbon dioxide, etc., which are easy to obtain and non-corrosive.

A direct contact heat exchange tower type solar thermal power station system, characterized in that the system includes a heliostat field, a heat absorber, a molten salt heat storage and heat release subsystem, a turbine, a generator, a preheater, a cooling Heat storage and release subsystem of molten salt includes high temperature direct contact heat exchanger, heat storage high temperature salt pump, heat release high temperature salt pump, heat storage low temperature salt pump I, heat release low temperature salt pump, high temperature salt tank , low temperature salt tank, medium temperature salt tank, heat storage medium temperature salt pump, heat storage low temperature salt pump II and medium temperature direct contact heat exchanger;

The preheater includes cold side inlet, cold side outlet, hot side inlet and hot side outlet, high temperature direct contact heat exchanger includes lower gas inlet, lower molten salt opening, upper gas outlet and upper molten salt opening, medium temperature direct contact heat exchange The cooler includes a lower gas inlet, a lower molten salt inlet, an upper gas outlet and an upper molten salt outlet, and the cooler includes a cold side inlet, a cold side outlet, a hot side inlet and a hot side outlet;

The heliostat field is arranged on the ground around the heat absorber;

The outlet of the compressor is connected with the inlet of the cold side of the preheater, and the outlet of the cold side of the preheater is divided into two routes, one of which is connected with the lower gas inlet of the high-temperature direct contact heat exchanger, and the upper gas outlet of the high-temperature direct contact heat exchanger is divided into two routes, one of which is connected with the gas inlet of the upper part of the high-temperature direct contact heat exchanger The inlet of the turbine is connected, the other is connected with the inlet of the heat absorber, the outlet of the heat absorber is divided into two, one is connected with the inlet of the turbine, and the other is connected with the gas inlet of the lower part of the high-temperature direct contact heat exchanger, and the turbine is coaxial with the generator At the same time, the outlet of the turbine is divided into two paths, one is connected to the gas inlet of the lower part of the medium temperature direct contact heat exchanger, the other is connected to the hot side inlet of the preheater, and the gas outlet of the upper part of the medium temperature direct contact heat exchanger is connected to the hot side inlet of the cooler , the outlet on the hot side of the preheater is connected to the inlet on the hot side of the cooler, and the outlet on the hot side of the cooler is connected to the inlet of the compressor;

The high-temperature salt tank and the medium-temperature salt tank are respectively connected to the upper molten salt opening of the high-temperature direct contact heat exchanger through a parallel thermal storage high-temperature salt pump and an exothermic high-temperature salt pump, and the lower molten salt opening of the high-temperature direct contact heat exchanger is connected through a parallel heat storage The low-temperature salt pump I and the exothermic low-temperature salt pump are connected with the low-temperature salt tank, and the low-temperature salt tank is also connected with the molten salt inlet at the lower part of the medium temperature direct contact heat exchanger through the heat storage low temperature salt pump II, and the medium temperature direct contact with the molten salt outlet at the upper part of the heat exchanger It is connected to the medium temperature salt tank through the heat storage medium temperature salt pump;

The high-temperature salt tank is connected to the first end of the high-temperature molten salt three-way valve, the second end of the high-temperature molten salt three-way valve passes through the heat storage high-temperature salt pump, and the third end of the high-temperature molten salt three-way valve passes through the exothermic high-temperature salt pump, and the heat storage high-temperature The salt pump is connected in parallel with the exothermic high-temperature salt pump and then connected to the upper molten salt opening of the high-temperature direct contact heat exchanger. The low-temperature salt tank opening is connected to the first end of the low-temperature molten salt three-way valve, and the second end of the low-temperature molten salt three-way valve Heat low-temperature salt pump Ⅰ, low-temperature molten salt three-way valve The third end passes through the exothermic low-temperature salt pump, and the heat-storage low-temperature salt pump I (6) is connected in parallel with the exothermic low-temperature salt pump and directly contacts the molten salt opening at the lower part of the heat exchanger connected;

The main loop gas regulating valve Ⅰ is set between the cold side outlet of the above preheater and the heat absorber inlet, and the main loop gas regulating valve Ⅱ is set between the heat absorber outlet and the turbine. The high temperature directly contacts the gas inlet at the lower part of the heat exchanger. There are two paths, one is provided with a heat storage gas inlet valve between one path and the outlet of the cold side of the preheater, and the other path is equipped with an exothermic gas inlet valve between the outlet of the heat absorber, and the high temperature directly contacts the upper part of the heat exchanger. There is an exothermic gas outlet valve between one road and the inlet of the heat absorber, a heat storage gas outlet valve between the other road and the turbine inlet, and a gas inlet between the turbine outlet and the gas inlet directly contacting the lower part of the medium temperature heat exchanger. There is a reheating gas regulating valve, a high-temperature molten salt regulating valve is installed between the opening of the high-temperature salt tank and the high-temperature molten salt three-way valve, and a medium-temperature molten salt regulating valve is also set between the high-temperature molten salt three-way valve and the medium-temperature salt tank;

The working method of the direct contact heat exchange tower type solar thermal power station system is characterized in that it includes the following process:

When the solar energy is sufficient, open the main circuit gas regulating valve I, exothermic gas inlet valve, main circuit gas regulating valve II, exothermic gas outlet valve, high temperature molten salt regulating valve, reheating gas regulating valve, and close the regenerative gas inlet valve , regenerative gas outlet valve and medium-temperature molten salt regulating valve, through the low-temperature molten salt three-way valve to connect the low-temperature salt tank, heat-storage low-temperature salt pump I and the high-temperature direct contact molten salt opening passage at the lower part of the heat exchanger, through the high-temperature molten salt three-way valve The through valve and the high temperature molten salt regulating valve are connected to the high temperature and directly contact the upper molten salt opening of the heat exchanger, the heat storage high temperature salt pump and the high temperature salt tank passage, and the air at the compressor outlet is preheated by the preheater and enters the heat absorber Heat, the high-temperature and high-pressure gas at the outlet is divided into two paths, one path directly contacts the low-temperature molten salt through the high-temperature direct contact heat exchanger, and transfers heat to the low-temperature molten salt, and the exothermic gas returns to the heat absorber to absorb heat, and after heating The high-temperature molten salt enters the high-temperature salt tank through the heat-storage high-temperature salt pump, and the other way enters the turbine to generate power. The gas after heat release and work is divided into two ways. The low-temperature molten salt pumped by the salt pump II directly contacts the heat storage, and the exothermic gas enters the cooler for cooling, and the other way enters the hot side inlet of the preheater to preheat the gas at the compressor outlet, and then enters the cooler for cooling. The gas enters the compressor to be recompressed, and the medium-temperature molten salt after heat storage enters the medium-temperature salt tank through the heat-storage medium-temperature salt pump;

When the solar energy is weak, but the high-temperature and high-pressure gas at the outlet of the heat absorber can still drive the turbine to generate power, open the main circuit gas regulating valve I, the main circuit gas regulating valve II and the regenerating gas regulating valve, and close the exothermic gas inlet valve , exothermic gas outlet valve, heat storage gas inlet valve, heat storage gas outlet valve, high temperature molten salt regulating valve and low temperature molten salt regulating valve, close the high temperature molten salt three-way valve and low temperature molten salt three-way valve, the outlet of the compressor After the air is preheated by the preheater, it enters the heat absorber to absorb heat, and the high-temperature and high-pressure gas at the outlet enters the turbine to do power generation. The low-temperature molten salt pumped through the heat storage low-temperature salt pump II directly contacts the heat storage, and the gas after heat release enters the cooler for cooling, and the other way enters the hot side inlet of the preheater to preheat the gas at the outlet of the compressor, and then enters the cooler for cooling , the cooled gas enters the compressor for recompression, and the heat-storage medium-temperature molten salt enters the medium-temperature salt tank through the heat-storage medium-temperature salt pump;

When the solar energy is poor and the high-temperature and high-pressure gas at the outlet of the heat absorber is not enough to drive the turbine to generate power, open the main circuit gas regulating valve I, the main circuit gas regulating valve II, the regenerative gas inlet valve, the regenerative gas outlet valve and the medium-temperature Molten salt regulating valve, close the exothermic gas inlet valve, exothermic gas outlet valve, high-temperature molten salt regulating valve and reheating gas regulating valve, connect the medium-temperature salt tank through the high-temperature molten salt three-way valve and the medium-temperature molten salt regulating valve, and discharge The hot high temperature salt pump and the high temperature directly contact the upper molten salt opening passage of the heat exchanger, and connect the high temperature directly contacting the lower molten salt opening of the heat exchanger, the exothermic low temperature salt pump and the low temperature salt tank passage through the low temperature molten salt three-way valve, and the compressor The outlet air is preheated by the preheater and divided into two paths, one path enters the heat absorber to absorb heat, and the other path directly contacts the heat exchanger with a high temperature to absorb heat directly with the medium temperature molten salt, and the gas after absorbing heat enters the turbine to generate power , after exothermic work, it enters the hot side inlet of the preheater to preheat the gas at the outlet of the compressor, and then enters the cooler to cool, and the cooled gas enters the compressor for recompression, and the exothermic low temperature molten salt enters the low temperature through the exothermic low temperature salt pump. salt shaker;

When there is no solar energy, close the main circuit gas regulating valve I, main circuit gas regulating valve II, exothermic gas inlet valve, exothermic gas outlet valve, high temperature molten salt regulating valve, medium temperature molten salt regulating valve and reheating gas regulating valve, Open the regenerative gas inlet valve and the regenerative gas outlet valve, and connect the high-temperature salt tank, the exothermic high-temperature salt pump and the high-temperature direct-contact molten salt opening passage on the upper part of the heat exchanger through the high-temperature molten salt three-way valve and the high-temperature molten salt regulating valve. Through the low-temperature molten salt three-way valve, the high-temperature direct contact heat exchanger lower molten salt opening, the exothermic low-temperature salt pump and the low-temperature salt tank are connected, and the air at the outlet of the compressor is preheated by the preheater and then directly contacts the heat exchanger through high temperature. Direct contact with hot molten salt to absorb heat, the gas after heat absorption enters the turbine to do power generation, after heat release and work, it enters the hot side inlet of the preheater to preheat the gas at the outlet of the compressor, and then enters the cooler to cool, and the cooled gas enters the compressor The machine is recompressed, and the exothermic low-temperature molten salt enters the low-temperature salt tank through the exothermic low-temperature molten salt.

The utility model sets four working modes for different situations of solar energy. When the solar energy is sufficient, while using the solar energy to generate electricity, the excess heat is stored with molten salt, and the waste heat of the turbine outlet gas is recovered; When the solar energy is weak, only use solar energy to generate electricity, and recover the waste heat of the turbine outlet gas; when the solar energy is weak, use solar energy and medium-temperature molten salt to simultaneously drive the turbine to generate power; generate electricity. This system can realize continuous and stable operation under different solar intensities, reduce the impact on the power grid, and provide stable high-quality electric energy. At the same time, it adopts a two-stage heat storage subsystem to improve the effective utilization rate of heat.

Description of drawings

Fig. 1 System diagram of a tower solar thermal power station in which gas and molten salt are in direct contact with each other for heat exchange;

The schematic diagram of the direct contact heat exchanger described in Fig. 2;

Figure 3 shows the working process diagram of the system when the solar energy is sufficient;

When the solar energy is slightly weaker as described in Fig. 4, the system working process diagram;

The system working process diagram when the solar energy is poor as described in Fig. 5;

The system working process diagram when there is no solar energy described in Fig. 6;

Label names in the figure: 1-heliostat field; 2-heat absorber; 3-high-temperature direct contact heat exchanger; 4-heat storage high-temperature salt pump; 5-exothermic high-temperature salt pump; 6-heat storage low-temperature salt pump Ⅰ; 7-exothermic low temperature salt pump; 8-high temperature salt tank; 9-low temperature salt tank; 10-medium temperature salt tank; 11-heat storage medium temperature salt pump; Heat exchanger; 14-turbine; 15-generator; 16-preheater; 17-cooler; 18-compressor; 191-main circuit gas regulating valve Ⅰ; 192-exothermic gas inlet valve; 193-main Circuit gas regulating valve II; 194-exothermic gas outlet valve; 195-regenerative gas outlet valve; 196-regenerative gas inlet valve; 197-high temperature molten salt regulating valve; 198-medium temperature molten salt regulating valve; 199-reheat Gas regulating valve; 201-high temperature molten salt three-way valve; 202-low temperature molten salt three-way valve; 2-1-gas outlet; 2-2-mist trap; 2-3-liquid inlet; 2-4-filler; 2-5-support grid; 2-6-gas inlet; 2-7-liquid outlet.

Specific implementation method

Fig. 1 is a system diagram of the direct contact heat exchange tower type solar thermal power station proposed by the utility model, and the working process of the system will be described below with reference to Fig. 1 .

When the solar energy is sufficient, open the main circuit gas regulating valve I191, the exothermic gas inlet valve 192, the main circuit gas regulating valve II193, the exothermic gas outlet valve 194, the high temperature molten salt regulating valve 197, the reheating gas regulating valve 199, and close the accumulator The hot gas inlet valve 196, the heat storage gas outlet valve 195 and the medium temperature molten salt regulating valve 198 are connected to the low temperature salt tank 9, the heat storage low temperature salt pump I6 and the lower part of the high temperature direct contact heat exchanger 3 through the low temperature molten salt three-way valve 202 The molten salt opening passage is connected to the high-temperature direct contact heat exchanger 3 upper molten salt opening, heat storage high-temperature salt pump 4 and high-temperature salt tank 8 passages through the high-temperature molten salt three-way valve 201 and the high-temperature molten salt regulating valve 197, and the compressor 18 After being preheated by the preheater 16, the air at the outlet enters the heat absorber 2 to absorb heat. The high temperature and high pressure gas at the outlet is divided into two paths, one path passes through the high temperature direct contact heat exchanger 3 and directly contacts the low temperature molten salt, and transfers the heat to the low temperature Molten salt, the exothermic gas returns to the heat absorber 2 to absorb heat, and the heated high-temperature molten salt enters the high-temperature salt tank 8 through the heat-storage high-temperature salt pump 4, and enters the turbine 14 to generate power through the other way. The gas is divided into two paths, one path enters the medium temperature and directly contacts the heat exchanger 13, and directly contacts the low-temperature molten salt pumped by the low-temperature salt 9 through the heat-storage low-temperature salt pump II 12 for heat storage, and the exothermic gas enters the cooler 17 for cooling, and the other All the way into the hot side inlet of the preheater 16 to preheat the gas at the outlet of the compressor 18, and then enter the cooler 17 to cool, and the cooled gas enters the compressor 18 for recompression, and the heat-stored medium-temperature molten salt passes through the heat-stored medium-temperature salt pump 11 Enter the middle temperature salt tank 10;

When the solar energy is slightly weak, but the high-temperature and high-pressure gas at the outlet of the heat absorber 2 can still drive the turbine 14 to generate power, open the main circuit gas regulating valve I191, the main circuit gas regulating valve II193 and the reheating gas regulating valve 199, and close the heat release Gas inlet valve 192, exothermic gas outlet valve 194, heat storage gas inlet valve 196, heat storage gas outlet valve 195, high temperature molten salt regulating valve 197 and medium temperature molten salt regulating valve 198, close the high temperature molten salt three-way valve 201 and the low temperature The molten salt three-way valve 202, the air at the outlet of the compressor 18 is preheated by the preheater 16, and then enters the heat absorber 2 to absorb heat, and the high-temperature and high-pressure gas at the outlet enters the turbine 14 to generate power, and the gas after heat release and work is divided into two One way enters the medium temperature directly contacting the heat exchanger 13, and directly contacts the low-temperature molten salt pumped by the low-temperature salt tank 9 through the heat storage low-temperature salt pump II12 for heat storage. The hot side inlet of the heater 16 preheats the gas at the outlet of the compressor 18, and then enters the cooler 17 for cooling, and the cooled gas enters the compressor 18 for recompression, and the heat-storage medium-temperature molten salt enters the medium-temperature salt through the heat-storage medium-temperature salt pump 11 tank 10;

When the solar energy is poor and the high-temperature and high-pressure gas at the outlet of the heat absorber 2 is not enough to drive the turbine 14 to generate power, open the main circuit gas regulating valve I191, the main circuit gas regulating valve II193, the regenerative gas inlet valve 196, and the regenerative gas outlet valve 195 and medium temperature molten salt regulating valve 198, close the exothermic gas inlet valve 192, exothermic gas outlet valve 194, high temperature molten salt regulating valve 197 and reheating gas regulating valve 199, through the high temperature molten salt three-way valve 201 and the medium temperature melting The salt regulating valve 198 is connected to the medium-temperature salt tank 10, the exothermic high-temperature salt pump 5, and the upper part of the high-temperature direct contact heat exchanger 3. The salt opening, the exothermic low-temperature salt pump 7 and the low-temperature salt tank 9 passages, the air at the outlet of the compressor 18 is preheated by the preheater 16 and then divided into two paths, one path enters the heat absorber 2 to absorb heat, and the other path passes through high-temperature direct contact exchange. Heater 3 is in direct contact with the medium-temperature molten salt to absorb heat, and the gas after absorbing heat enters turbine 14 to perform power generation. After releasing heat and performing work, it enters the hot side inlet of preheater 16 to preheat the gas at the outlet of compressor 18, and then enters cooler 17 for cooling. , the cooled gas enters the compressor 18 for recompression, and the exothermic low-temperature molten salt enters the low-temperature salt tank 9 through the exothermic low-temperature salt pump 7;

When there is no solar energy, close the main circuit gas regulating valve I191, main circuit gas regulating valve II193, exothermic gas inlet valve 192, exothermic gas outlet valve 194, high temperature molten salt regulating valve 197, medium temperature molten salt regulating valve 198 and heat recovery Gas regulating valve 199, open heat storage gas inlet valve 196 and heat storage gas outlet valve 195, connect high temperature salt tank 8, exothermic high temperature salt pump 5 and high temperature through high temperature molten salt three-way valve 201 and high temperature molten salt regulating valve 197 Direct contact heat exchanger 3 upper molten salt opening passage, through low-temperature molten salt three-way valve 202 to connect high temperature direct contact heat exchanger 3 lower molten salt opening, exothermic low-temperature salt pump 7 and low-temperature salt tank 9 passages, compressor 18 The air at the outlet is preheated by the preheater 16 and then directly contacts the heat exchanger 3 to absorb heat through the high temperature direct contact with the hot molten salt. The inlet preheats the gas at the outlet of the compressor 18, and then enters the cooler 17 for cooling. The cooled gas enters the compressor 18 for recompression, and the exothermic low-temperature molten salt enters the low-temperature salt tank 9 through the exothermic low-temperature molten salt 7 .

Claims (1)

1. A kind of 1. direct contact heat transfer tower type solar energy thermal power generation station system, it is characterised in that：The system includes heliostat field （1）, heat dump（2）, fused salt accumulation of heat heat release subsystem, turbine（14）, generator（15）, preheater（16）, cooler（17）With Compressor（18）, wherein fused salt accumulation of heat heat release subsystem includes high temperature direct contact heat transfer device（3）, accumulation of heat high temperature salt pump（4）, put Hot high temperature salt pump（5）, accumulation of heat low temperature salt pump I（6）, heat release low temperature salt pump（7）, high temperature salt cellar（8）, low temperature salt cellar（9）, middle thermohaline Tank（10）, accumulation of heat medium temperature salt pump（11）, accumulation of heat low temperature salt pump II（12）With medium temperature direct contact heat transfer device（13）；

   Preheater（16）Including cold side input port, cold side outlet port, hot side entrance and hot side outlet, high temperature direct contact heat transfer device（3） Including lower gas entrance, bottom fused salt opening, upper gas outlet and top fused salt opening, medium temperature direct contact heat transfer device （13）Including lower gas entrance, bottom fused salt entrance, upper gas outlet and the outlet of top fused salt, cooler（17）Including cold Side entrance, cold side outlet port, hot side entrance and hot side outlet；

   Heliostat field（1）It is arranged in heat dump（2）On the ground of surrounding；

   Compressor（18）Outlet and preheater（16）Cold side input port is connected, preheater（16）Cold side outlet port divides two-way, all the way with height Warm direct contact heat transfer device（3）Lower gas entrance is connected, high temperature direct contact heat transfer device（3）Upper gas outlet is divided into two Road, all the way with turbine（14）Entrance is connected, another way and heat dump（2）Entrance is connected, heat dump（2）Outlet divides two-way, all the way With turbine（14）Entrance is connected, another way and high temperature direct contact heat transfer device（3）Lower gas entrance is connected, turbine（14）With hair Motor（15）It is coaxial to be connected, while turbine（14）Outlet divide two-way, all the way with medium temperature direct contact heat transfer device（13）Lower gas Entrance is connected, another way and preheater（16）Hot side entrance is connected, medium temperature direct contact heat transfer device（13）Upper gas export with Cooler（17）Hot side entrance is connected, preheater（16）Hot side outlet and cooler（17）Hot side entrance is connected, cooler（17） Hot side outlet and compressor（18）Import is connected；

   High temperature salt cellar（8）With low temperature salt cellar（10）Pass through the accumulation of heat high temperature salt pump of parallel connection respectively（4）With heat release high temperature salt pump（5）With High temperature direct contact heat transfer device（3）Top fused salt opening is connected, high temperature direct contact heat transfer device（3）Bottom fused salt opening passes through simultaneously The accumulation of heat low temperature salt pump I of connection（6）With heat release low temperature salt pump（7）With low temperature salt cellar（9）It is connected, low temperature salt cellar（9）Also pass through accumulation of heat Low temperature salt pump II（12）With medium temperature direct contact heat transfer device（13）Bottom fused salt entrance is connected, medium temperature direct contact heat transfer device（13） Top fused salt outlet passes through accumulation of heat medium temperature salt pump（11）With medium temperature salt cellar（10）It is connected；

   High temperature salt cellar（8）With high-temperature molten salt triple valve（201）First end is connected, high-temperature molten salt triple valve（201）Second end passes through Accumulation of heat high temperature salt pump（4）, high-temperature molten salt triple valve（201）3rd end passes through heat release high temperature salt pump（5）, accumulation of heat high temperature salt pump（4） With heat release high temperature salt pump（5）After parallel connection with high temperature direct contact heat transfer device（3）Top fused salt opening is connected, low temperature salt cellar（9）Open Mouth and low-temperature molten salt triple valve（202）First end is connected, low-temperature molten salt triple valve（202）Second end passes through accumulation of heat low temperature salt pump I （6）, low-temperature molten salt triple valve（202）3rd end passes through heat release low temperature salt pump（7）, accumulation of heat low temperature salt pump I（6）With heat release low temperature salt Pump（7）After parallel connection with high temperature direct contact heat transfer device（3）Bottom fused salt opening is connected；

   Above-mentioned preheater（16）Cold side outlet port and heat dump（2）Major loop gas control valve I is provided between entrance（191）, heat absorption Device（2）Outlet and turbine（14）Between be provided with major loop gas control valve II（193）, high temperature direct contact heat transfer device（3）Bottom There is two-way gas access, all the way with preheater（16）Accumulation of heat gas access valve is provided between cold side outlet port（196）, another way is with inhaling Hot device（2）Exothermal gas entrance valve is provided between outlet（192）, high temperature direct contact heat transfer device（3）Upper gas outlet has two Road, all the way with heat dump（2）Exothermal gas outlet valve is provided between entrance（194）, another way and turbine（14）Set between entrance There is accumulation of heat gas vent valve（195）, turbine（14）Outlet and medium temperature direct contact heat transfer device（13）Set between lower gas entrance There is backheat gas control valve（199）, high temperature salt cellar（8）Opening and high-temperature molten salt triple valve（201）Between be provided with high-temperature molten salt adjust Save valve（197）, high-temperature molten salt triple valve（201）Also with medium temperature salt cellar（10）Between be provided with middle temperature molten salt regulating valve（198）.