CN112532111B - Thermoelectric power generation system of boiler slag bucket heat source - Google Patents
Thermoelectric power generation system of boiler slag bucket heat source Download PDFInfo
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Abstract
The invention belongs to the technical field of semiconductor thermoelectric power generation by using a low-grade heat source, and particularly relates to a thermoelectric power generation system of a boiler slag hopper heat source. The thermoelectric generator is formed by combining a vapor-water type semiconductor thermoelectric generator and an organic working medium type semiconductor thermoelectric generator, a low-temperature side cold source is provided for cooling and supplying water by a cascade shared slag bucket, and a two-stage heat storage mode is adopted to perform thermoelectric power generation by utilizing a slag bucket coke slag heat source; the high-temperature side heat source of the steam-water type semiconductor thermoelectric generator is 95-160 ℃, the high-temperature side heat source of the organic working medium type semiconductor thermoelectric generator is 85-150 ℃, and the low-temperature sides of the steam-water type semiconductor thermoelectric generator and the organic working medium type semiconductor thermoelectric generator are both cooled by a slag bucket cooling water source, wherein the temperature range is 1-30 ℃; the critical temperature range of the organic working medium selected by the organic working medium type semiconductor thermoelectric generator is 35-140 ℃. The invention improves the power generation efficiency of the waste heat of the coke slag, saves the cooling water amount and has obvious energy-saving and emission-reducing effects.
Description
Technical Field
The invention belongs to the technical field of semiconductor thermoelectric power generation by using a low-grade heat source, and particularly relates to a thermoelectric power generation system of a boiler slag hopper heat source.
Background
The total quantity of waste heat contained in the coke slag of the boiler is large, but the heat grade is low, the recovery efficiency is low, the quality improvement technical level is low, and the problems of difficult waste heat recovery and the like caused by insufficient heat storage due to the adoption of the spiral slag-dragging, deslagging and conveying speed for fixing the speed exist. Especially, under the condition of burning coal gangue or blending coal slime, the bottom slag quantity is very large, and the sensible heat loss of the bottom slag can reach more than 1 percent.
At present, a buried pipe cooler and a heat conduction oil heat accumulator are generally adopted for recovering low-slag waste heat of a large pulverized coal boiler. But the potential of the total waste heat recovery is not enough, the heat of the low slag can not be fully recovered, and water is consumed by adopting water spray cooling to ensure the cooling or the slag crushing effect. The invention can deeply recover the residual heat of the coke slag, effectively reduce the coal consumption of power generation by about 1.5g/kWh, and perform the heat storage process on the residual heat of the coke slag, thereby playing the effects of strengthening heat exchange and saving water, and being more suitable for the energy-saving reconstruction of large boilers.
When the device normally operates, high-temperature ash discharged from a hearth enters an ash hopper, is cooled under the action of cooling water, is stirred, pressed and crushed by a spiral slag conveyor, and is conveyed to an ash storage field by an ash pump. Because slag and water are mixed, the heat quality is lower, the heat exchange effect is poorer, the temperature of the slag and water mixture is between 70 and 95 ℃, and the cooling water adjusting means of the system can not be intelligently combined with waste heat recovery, so that huge waste of heat and water is generated, the temperature of ash slag which can be more effectively utilized is reduced, the waste heat recovery condition of coke slag is deteriorated, and the systematic energy consumption is increased for a conveying system, an ash slag storage field and slag water recycling.
The invention discloses a thermoelectric power generation system of a boiler slag hopper heat source, which aims at the problems of large total quantity of waste heat of ash slag, difficult recovery, low recovery efficiency, low recovery quality, poor combustion of a hearth caused by easy failure of water seal at the bottom of a furnace, large cooling water quantity and the like.
Disclosure of Invention
The invention aims to solve the problems of low recovery efficiency and low recovery quality of the waste heat of the boiler coke residue, and the deterioration of combustion of a hearth, large cooling water quantity and the like caused by the fact that water seal sealing of a furnace bottom is easy to lose efficacy.
In order to achieve the purpose, the invention adopts the following technical scheme:
the thermoelectric power generation system of the boiler slag bucket heat source comprises a steam-water type semiconductor thermoelectric generator system, an organic working medium type semiconductor thermoelectric generator system, a thermal connecting component between the steam-water type semiconductor thermoelectric generator system and the organic working medium type semiconductor thermoelectric generator system, a controller group, a storage battery group energy storage connecting switch, a storage battery group and a frequency converter, and adopts cascade common cooling water supply cooling to perform semiconductor thermoelectric power generation by using a slag bucket coke slag heat source;
the steam-water type semiconductor thermoelectric generator system comprises a slag bucket cooling main water supply electric door, a furnace bottom water seal groove water supply door, a low-temperature side water supply door of a steam-water type semiconductor thermoelectric generator, a high-temperature side of the steam-water type semiconductor thermoelectric generator, a low-temperature side of the steam-water type semiconductor thermoelectric generator, an inlet water door of a first-side water seal groove heat exchanger, an inlet water door of a second-side water seal groove heat exchanger, a sealing ring water flow channel in the water seal groove, a furnace bottom slag bucket water seal groove, a first-side water seal groove heat exchanger, the lower part of a boiler hearth, the internal resistance of the steam-water type semiconductor thermoelectric generator and a power output switch of the steam-water type semiconductor thermoelectric generator; under the action of the thermodynamic process of the system, a high-temperature side heat source is a steam-water medium with the temperature of 95-160 ℃, low-temperature side cold sources are all cooled by a slag bucket cooling water source, the temperature range is 1-30 ℃, a coke slag heat source realizes power generation in a heat storage and temperature difference power generation conversion mode, and the switching of power storage and power utilization requirements is met according to the actual engineering technical requirements.
The organic working medium type semiconductor thermoelectric generator system comprises a heat accumulator, a flash evaporator, an organic working medium type semiconductor thermoelectric generator high-temperature side, an organic working medium type semiconductor thermoelectric generator low-temperature side, an organic working medium injection door, an organic working medium standby door, an organic working medium type semiconductor thermoelectric generator internal resistance and an organic working medium type semiconductor thermoelectric generator power output switch; under the action of the thermodynamic process of the system, the high-temperature side heat source is an organic working medium at 85-150 ℃, and the low-temperature side cold source is cooled by a slag bucket cooling water source, wherein the temperature range is 1-30 ℃. The coke residue heat source realizes the power generation function through heat storage and temperature difference power generation conversion modes, and meets the requirements of power storage and power utilization for switching according to the actual engineering technical requirements.
The thermal connecting component comprises a heat exchange pipe in the slag hopper cooling pool, a furnace bottom slag hopper cooling water supply inlet door, a furnace bottom slag hopper side plate and a condenser; by the system connection mode, the cascade energy utilization of the steam-water type semiconductor thermoelectric generator and the organic working medium type semiconductor thermoelectric generator is realized in the process of cooling the hot slag.
The slag bucket cooling main water supply electric door is connected with an inlet at the low-temperature side of the steam-water type semiconductor thermoelectric generator through a steam-water type semiconductor thermoelectric generator low-temperature side water supply door, an outlet at the low-temperature side of the steam-water type semiconductor thermoelectric generator is connected with an inlet at the low-temperature side of the organic working medium type semiconductor thermoelectric generator, an outlet at the low-temperature side of the organic working medium type semiconductor thermoelectric generator is connected with a cooling medium inlet of a condenser, a cooling medium outlet of the condenser is connected with a heat exchange tube inlet arranged in a slag bucket cooling pool, an outlet of the heat exchange tube is connected with one end of a furnace bottom slag bucket cooling water supply inlet door, the other end of the furnace bottom slag bucket cooling water supply inlet door is respectively connected with one end of a water seal groove first side heat exchanger inlet water door and one end of a water seal groove second side heat exchanger inlet water door, and the other ends of the water seal groove first side heat exchanger inlet water door and the water seal groove second side heat exchanger inlet water door are respectively connected with a water seal groove first side heat exchanger second side heat exchanger water seal groove arranged in a furnace bottom slag bucket water seal groove The heat source of the water-sealed tank A-B side heat exchanger is mainly derived from radiant heat of coke slag falling from the position where the water-sealed tank of the furnace bottom slag hopper and the lower part of the boiler hearth are located, and in the process, the heat source of the water-sealed tank A-B side heat exchanger is simultaneously subjected to the temperature lifting effect of the heat exchange tube on the slag hopper cooling pool, so that the heat exchange efficiency is improved. The outlet of the high-temperature side of the steam-water type semiconductor thermoelectric generator is connected with the heat medium inlet of the flash evaporator, the heat medium outlet of the flash evaporator is connected with a sealing ring water channel in a water sealing groove arranged in a slag bucket water sealing groove at the bottom of the furnace, a slag bucket cooling main water supply electric door is arranged between the slag bucket cooling main water supply electric door and a water supply door at the low-temperature side of the steam-water type semiconductor thermoelectric generator, the slag bucket water supply water door is connected with the sealing ring water channel in the water sealing groove, a slag bucket side plate arranged at the outer side of the slag bucket water sealing groove at the bottom of the furnace is connected with a slag bucket cooling pool and used for providing a heat source for the heat exchange tube and a heat accumulator arranged in the slag bucket cooling pool, and cooled slag-water mixture is conveyed and discharged through a slag pump; heat exchange tubes and heat accumulators are arranged in the slag bucket cooling pool, the medium in the heat exchange tubes is water, and the medium in the heat accumulators is organic working medium. The organic working medium can realize phase state conversion in a low-temperature state, and the heat exchange effect of the system is improved.
The flash evaporator is provided with an organic working medium injection door, an outlet at the upper end of the flash evaporator is connected with an inlet at the high-temperature side of the semiconductor thermoelectric generator, one path of the outlet at the high-temperature side of the semiconductor thermoelectric generator reserves a standby interface through the organic working medium standby door, the other path of the outlet is connected with a heat medium inlet of the condenser, the heat medium outlet of the condenser is connected with the inlet of the heat accumulator, and the outlet of the heat accumulator is connected with the inlet at the lower end of the flash evaporator; the thermal process provides a conversion foundation for recycling the heat energy of the low-grade coke slag
The steam-water type semiconductor thermoelectric generator is connected with a controller group through the internal resistance of the steam-water type semiconductor thermoelectric generator and the power output switch of the steam-water type semiconductor thermoelectric generator, the outlet of the controller group is connected with a storage battery group through a storage battery group energy storage connecting switch, and the other outlet of the controller group is connected to a frequency converter; the organic working medium type semiconductor thermoelectric generator is connected with the controller group through the internal resistance of the organic working medium type semiconductor thermoelectric generator and the power output switch of the organic working medium type semiconductor thermoelectric generator, the outlet of the controller group is connected with the storage battery group through the storage battery group energy storage connecting switch, and the other outlet of the controller group is connected to the frequency converter.
The steam-water type semiconductor thermoelectric generator and the organic working medium type semiconductor thermoelectric generator adopt a mode of sharing cooling water supply in a cascade mode, and the circulating power of the cooling water supply comes from the pressure head of a main water supply electric door cooled by a slag bucket and the high-low level energy of the arrangement. The thermodynamic process realizes cascade utilization of cooling water.
Cooling water enters the first-side heat exchanger of the water-sealed tank after passing through the inlet water gate of the first-side heat exchanger of the water-sealed tank and the inlet water gate of the second-side heat exchanger of the water-sealed tank, enters the high-temperature side of the steam-water type semiconductor thermoelectric generator to flow out, passes through the flash evaporator to flow out, enters the water-sealed tank of the slag bucket at the bottom of the furnace to be mixed with the cooling water in the seal ring water flowing channel in the water-sealed tank to form primary heat storage of the slag bucket heat source; meanwhile, a heat exchange tube and a heat accumulator in the slag bucket cooling pool are arranged in the slag bucket cooling pool to finish secondary heat accumulation of water and organic working medium, and the water enters a heat exchanger on the first side and the second side of the water seal tank through a furnace bottom slag bucket cooling water supply inlet door. Namely, the invention adopts a secondary heat storage method to improve the heat exchange effect of the system.
Furthermore, the working medium in the organic working medium type semiconductor thermoelectric generator system is an organic working medium with the critical temperature of 35-140 ℃.
Furthermore, the storage battery pack is connected with the frequency converter and provides power output according to the voltage type required by a user.
Compared with the prior art, the invention has the following advantages:
the thermoelectric power generation system of the boiler slag bucket heat source adopts the combination of the steam-water type semiconductor thermoelectric generator and the organic working medium type semiconductor thermoelectric generator, the slag bucket cooling water supply is shared by the steps, a two-stage heat storage mode is adopted, the slag bucket coke slag heat source is utilized for thermoelectric power generation, the efficiency of coke slag waste heat power generation is improved, and the remarkable energy-saving and emission-reducing effects are achieved.
Drawings
FIG. 1 is a thermoelectric power generation system for a boiler slag hopper heat source.
In fig. 1: 1 slag bucket cooling total water supply electric door, 2 furnace bottom water seal groove water supply door, 3 vapor water type semiconductor thermoelectric generator low-temperature side water supply door, 4 vapor water type semiconductor thermoelectric generator, 4-1 vapor water type semiconductor thermoelectric generator high-temperature side, 4-2 vapor water type semiconductor thermoelectric generator low-temperature side, 5 slag bucket cooling pond inner heat exchange tubes, 6 slag bucket cooling pond, 7 furnace bottom slag bucket cooling water supply inlet door, 8 water seal groove first side heat exchanger inlet door, 9 water seal groove second side heat exchanger inlet door, 10 water seal groove inner seal ring water flowing channel, 11 furnace bottom slag bucket water seal groove, 12 water seal groove first side heat exchanger, 13 boiler furnace hearth lower part, 14 furnace bottom slag bucket side plate, 15 vapor water type semiconductor thermoelectric generator, 16 vapor water type semiconductor thermoelectric generator internal resistance power output switch, 17 controller group, 18 storage battery group energy switch, the system comprises a storage battery pack 19, a frequency converter 20, a semiconductor thermoelectric generator heat accumulator of an organic working medium type 21, a flash evaporator 22, a semiconductor thermoelectric generator of an organic working medium type 23-1, a semiconductor thermoelectric generator of an organic working medium type 23-2, a condenser 24, an internal resistance of the semiconductor thermoelectric generator of an organic working medium type 25, a power output switch of the semiconductor thermoelectric generator of an organic working medium type 26, an organic working medium injection door 27 and an organic working medium standby door 28.
Detailed Description
The thermoelectric power generation system of the boiler slag bucket heat source comprises a steam-water type semiconductor thermoelectric generator system, an organic working medium type semiconductor thermoelectric generator system, a thermal connecting component between the steam-water type semiconductor thermoelectric generator system and the organic working medium type semiconductor thermoelectric generator system, a controller group 17, a storage battery pack energy storage connecting switch 18, a storage battery pack 19 and a frequency converter 20;
the steam-water type semiconductor thermoelectric generator system comprises a slag bucket cooling main water supply electric door 1, a furnace bottom water seal groove water supply door 2, a low-temperature side water supply door 3 of the steam-water type semiconductor thermoelectric generator, a steam-water type semiconductor thermoelectric generator 4, a high-temperature side 4-1 of the steam-water type semiconductor thermoelectric generator, a low-temperature side 4-2 of the steam-water type semiconductor thermoelectric generator, an inlet water door 8 of a water seal groove A side heat exchanger, an inlet water door 9 of a water seal groove B side heat exchanger, a sealing ring water flow channel 10 in the water seal groove, a furnace bottom slag bucket water seal groove 11, a water seal groove A B side heat exchanger 12, a boiler furnace hearth lower part 13, internal resistance 15 of the steam-water type semiconductor thermoelectric generator and a power output switch 16 of the steam-water type semiconductor thermoelectric generator 4;
the organic working medium type semiconductor thermoelectric generator system comprises a heat accumulator 21, a flash evaporator 22, an organic working medium type semiconductor thermoelectric generator 23, an organic working medium type semiconductor thermoelectric generator high-temperature side 23-1, an organic working medium type semiconductor thermoelectric generator low-temperature side 23-2, an organic working medium injection door 27, an organic working medium standby door 28, an organic working medium type semiconductor thermoelectric generator internal resistance 25 and an organic working medium type semiconductor thermoelectric generator power output switch 26;
the thermal connecting component comprises a heat exchange tube 5 in a slag hopper cooling pool, a slag hopper cooling pool 6, a furnace bottom slag hopper cooling water supply inlet door 7, a furnace bottom slag hopper side plate 14 and a condenser 24;
the slag bucket cooling total water supply electric door 1 is connected with an inlet of a low-temperature side 4-2 of a steam-water type semiconductor thermoelectric generator through a low-temperature side water supply door 3 of the steam-water type semiconductor thermoelectric generator, an outlet of the low-temperature side 4-2 of the steam-water type semiconductor thermoelectric generator is connected with an inlet of a low-temperature side 23-2 of an organic working medium type semiconductor thermoelectric generator, an outlet of the low-temperature side 23-2 of the organic working medium type semiconductor thermoelectric generator is connected with a cooling medium inlet of a condenser 24, a cooling medium outlet of the condenser 24 is connected with an inlet of a heat exchange tube 5 arranged in a slag bucket cooling pool 6, an outlet of the heat exchange tube 5 is connected with one end of a slag bucket cooling water supply inlet door 7, the other end of the slag bucket cooling water supply inlet door 7 is respectively connected with one end of a water seal tank first side heat exchanger inlet water door 8 and one end of a water seal tank second side heat exchanger inlet water door 9, the other ends of the inlet water gate 8 of the water-sealed tank A side heat exchanger and the inlet water gate 9 of the water-sealed tank B side heat exchanger are respectively connected with the inlet of a water-sealed tank A B side heat exchanger 12 arranged in a furnace bottom slag bucket water-sealed tank 11, the outlet of the water-sealed tank A B side heat exchanger 12 is connected with the inlet of the high-temperature side 4-1 of a steam-water type semiconductor thermoelectric generator, the heat source of the water-sealed tank A B side heat exchanger 12 is mainly derived from the radiant heat of coke slag falling from the positions of the furnace bottom slag bucket water-sealed tank 11 and the lower part 13 of a boiler hearth, the outlet of the high-temperature side 4-1 of the steam-water type semiconductor thermoelectric generator is connected with the hot medium inlet of a flash evaporator 22, the hot medium outlet of the flash evaporator 22 is connected with a sealing ring water flow channel 10 arranged in the water-sealed tank 11, a water-sealed tank water supply water gate 2 is arranged between the slag bucket cooling total water supply electric gate 1 and the low-temperature side water supply door 3 of the steam-water type semiconductor thermoelectric generator, the furnace bottom water seal groove water supply door 2 is connected with a sealing ring water flowing channel 10 in the water seal groove, a furnace bottom slag bucket side plate 14 is arranged on the outer side of a furnace bottom slag bucket water seal groove 11 and connected with a slag bucket cooling pool 6, and is used for providing a heat source for the heat exchange tube 5 and a heat accumulator 21 arranged in the slag bucket cooling pool 6, and cooled slag-water mixture is conveyed and discharged through a slag pump;
the flash evaporator 22 is provided with an organic working medium injection door 27, an outlet at the upper end of the flash evaporator 22 is connected with an inlet at the high-temperature side 23-1 of the organic working medium type semiconductor thermoelectric generator, one path of an outlet at the high-temperature side 23-1 of the organic working medium type semiconductor thermoelectric generator reserves a standby interface through an organic working medium standby door 28, the other path of the outlet is connected with a heat medium inlet of a condenser 24, a heat medium outlet of the condenser 24 is connected with an inlet of the heat accumulator 21, and an outlet of the heat accumulator 21 is connected with an inlet at the lower end of the flash evaporator 22;
the steam-water type semiconductor thermoelectric generator 4 is connected with a controller group 17 through a steam-water type semiconductor thermoelectric generator internal resistance 15 and a steam-water type semiconductor thermoelectric generator power output switch 16, an outlet of the controller group 17 is connected with a storage battery pack 19 through a storage battery pack energy storage connecting switch 18, and the other outlet of the controller group 17 is connected to a frequency converter 20; the organic working medium type semiconductor thermoelectric generator 23 is connected with the controller group 17 through the internal resistance 25 of the organic working medium type semiconductor thermoelectric generator and the power output switch 26 of the organic working medium type semiconductor thermoelectric generator, the outlet of the controller group 17 is connected with the storage battery pack 19 through the storage battery pack energy storage connecting switch 18, the other outlet of the controller group 17 is connected with the frequency converter 20, and the storage battery pack 19 is connected with the frequency converter 20 and provides power output according to the voltage type required by a user.
The working medium in the organic working medium type semiconductor thermoelectric generator system is an organic working medium with the critical temperature of 35-140 ℃.
The working process is as follows:
the steam-water type semiconductor thermoelectric generator 4 adopts a steam-water medium provided by the heat exchanger 12 at the first side of the water-sealed tank as a heat source at the high-temperature side 4-1 of the steam-water type semiconductor thermoelectric generator, and uses slag bucket cooling water supply as a cold source. The flow of the heat source at the high-temperature side 4-1 of the steam-water type semiconductor thermoelectric generator is as follows: cooling water sequentially passes through a slag bucket cooling main water supply electric door 1, a steam-water type semiconductor thermoelectric generator low-temperature side water supply door 3, a steam-water type semiconductor thermoelectric generator low-temperature side 4-2, an organic working medium type semiconductor thermoelectric generator low-temperature side 23-2, a condenser 24, a heat exchange tube 5 in a slag bucket cooling pool, a furnace bottom slag bucket cooling water supply inlet door 7, a water seal tank A side heat exchanger inlet water door 8, a water seal tank B side heat exchanger inlet water door 9, a water seal tank A B side heat exchanger 12, a steam-water type semiconductor thermoelectric generator high-temperature side 4-1, a flash evaporator 22, a water seal tank inner sealing ring water flow channel 10, is mixed with water in a furnace bottom slag bucket water seal tank 11 for supplying water from a furnace bottom water seal tank water supply door 2, then flows into a slag bucket cooling pool 6 through a furnace bottom slag bucket side plate 14 to cool incandescent coke slag, and provides a heat source for heat exchange tubes 5 and 21 in the slag bucket cooling pool, storing heat and raising temperature, and conveying and discharging the cooled slag-water mixture through a slag pump. The flow of the cold source at the low-temperature side 4-2 of the steam-water type semiconductor thermoelectric generator is as follows: the cooling water passes through the slag bucket to cool the main water supply electric door 1, then passes through the hot water type semiconductor thermoelectric generator low-temperature side water supply door 3, enters the steam water type semiconductor thermoelectric generator low-temperature side 4-2, and is connected to the organic working medium type semiconductor thermoelectric generator low-temperature side 23-2 after flowing out. In the thermal process, the steam-water type semiconductor thermoelectric generator 4 generates power, and the power is output to the controller group 17 through the internal resistance 15 of the steam-water type semiconductor thermoelectric generator and the power output switch 16 of the steam-water type semiconductor thermoelectric generator for function control and adjustment. The outlet of the controller group 17 is connected with the switch 18 through the storage battery pack energy storage and then stores energy under the action of the storage battery pack 19. The outlet of the controller group 17 is connected to the frequency converter 20, and the output is performed after mode conversion according to the power demand of the user.
The organic working medium type semiconductor thermoelectric generator adopts the organic working medium flowing out of the flash evaporator 22 as a heat source at the high-temperature side 23-1 and the slag bucket cooling water as a cold source. The flow of the cold source at the low temperature side 23-2 is as follows: the cooling water from the low-temperature side 4-2 of the steam-water type semiconductor thermoelectric generator enters the low-temperature side 23-2 of the organic working medium type semiconductor thermoelectric generator and then flows out. In the thermodynamic process, the organic working medium type semiconductor thermoelectric generator 23 generates power, the power is output to the controller group 17 through the internal resistance 25 of the organic working medium type semiconductor thermoelectric generator and the power output switch 26 of the organic working medium type semiconductor thermoelectric generator, and the function control and adjustment are carried out. The outlet of the controller group 17 is connected with the switch 18 through the storage battery pack energy storage and then stores energy under the action of the storage battery pack 19. The outlet of the controller group 17 is connected to the frequency converter 20, and the output is performed after mode conversion according to the power demand of the user.
The invention adopts secondary heat storage to improve the heat exchange capability of the system. Cooling water enters a water seal tank A and B side heat exchanger inlet water gate 12 after passing through a water seal tank A side heat exchanger inlet water gate 8 and a water seal tank B side heat exchanger inlet water gate 9, then enters a steam-water type semiconductor thermoelectric generator 4 and flows out from a high-temperature side 4-1, then passes through a flash evaporator 22 and flows out, enters a furnace bottom slag hopper water seal tank 11 and is mixed with cooling water in a sealing ring water flowing channel 10 in the water seal tank to form primary heat storage of a slag hopper heat source; meanwhile, a heat exchange tube 5 and a heat accumulator 21 in the slag bucket cooling pool are arranged in the slag bucket cooling pool 6 to finish the secondary heat accumulation of water and organic working medium, and the water enters a heat exchanger 12 on the first side and the second side of the water seal tank through a furnace bottom slag bucket cooling water supply inlet door 7.
Organic working media are injected into the flash evaporator 22 through an organic working media injection door 27, the organic working media flow out after being heated and evaporated through the high-temperature side 23-1 of the organic working media type semiconductor thermoelectric generator, a standby interface is reserved on one path through an organic working media standby door 28, the normal state is in a valve closing standby state, the other path flows into the condenser 24 for condensation and then flows into the organic working media type semiconductor thermoelectric generator heat accumulator 21, the outlet of the heat accumulator 21 is connected to the flash evaporator 22, and the circulation of the organic working media is completed.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the detailed description is made with reference to the embodiments of the present invention, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall be covered by the claims of the present invention.
Claims (3)
1. The thermoelectric power generation system of the boiler slag hopper heat source is characterized by comprising a steam-water type semiconductor thermoelectric generator system, an organic working medium type semiconductor thermoelectric generator system, a thermal connecting component between the steam-water type semiconductor thermoelectric generator system and the organic working medium type semiconductor thermoelectric generator system, a controller group (17), a storage battery pack energy storage connecting switch (18), a storage battery pack (19) and a frequency converter (20);
the steam-water type semiconductor thermoelectric generator system comprises a slag bucket cooling main water supply electric door (1), a furnace bottom water seal groove water supply door (2), a low-temperature side water supply door (3) of a steam-water type semiconductor thermoelectric generator, the steam-water type semiconductor thermoelectric generator (4), a high-temperature side (4-1) of the steam-water type semiconductor thermoelectric generator, a low-temperature side (4-2) of the steam-water type semiconductor thermoelectric generator, an inlet water door (8) of a first side heat exchanger of a water seal groove, an inlet water door (9) of a second side heat exchanger of the water seal groove, a sealing ring water flow channel (10) in the water seal groove, a furnace bottom slag bucket water seal groove (11), a first side heat exchanger of the water seal groove (12), a boiler furnace hearth lower part (13), an internal resistance (15) of the steam-water type semiconductor thermoelectric generator and an electric power output switch (16) of the steam-water type semiconductor thermoelectric generator (4);
the organic working medium type semiconductor thermoelectric generator system comprises a heat accumulator (21), a flash evaporator (22), an organic working medium type semiconductor thermoelectric generator (23), an organic working medium type semiconductor thermoelectric generator high-temperature side (23-1), an organic working medium type semiconductor thermoelectric generator low-temperature side (23-2), an organic working medium injection door (27), an organic working medium standby door (28), an organic working medium type semiconductor thermoelectric generator internal resistance (25) and an organic working medium type semiconductor thermoelectric generator power output switch (26);
the thermal connecting component comprises a heat exchange pipe (5) in the slag bucket cooling pool, a slag bucket cooling pool (6), a furnace bottom slag bucket cooling water supply inlet door (7), a furnace bottom slag bucket side plate (14) and a condenser (24);
the slag bucket cooling total water supply electric door (1) is connected with an inlet of a low-temperature side (4-2) of a steam-type semiconductor thermoelectric generator through a steam-type semiconductor thermoelectric generator low-temperature side water supply door (3), an outlet of the low-temperature side (4-2) of the steam-type semiconductor thermoelectric generator is connected with an inlet of a low-temperature side (23-2) of an organic working medium type semiconductor thermoelectric generator, an outlet of the low-temperature side (23-2) of the organic working medium type semiconductor thermoelectric generator is connected with a cold medium inlet of a condenser (24), a cold medium outlet of the condenser (24) is connected with an inlet of a heat exchange tube (5) arranged in a slag bucket cooling pool (6), an outlet of the heat exchange tube (5) is connected with one end of a slag bucket cooling inlet water supply door (7), and the other end of the slag bucket cooling inlet water supply door (7) of the furnace bottom is respectively connected with a water seal tank A side heat exchanger inlet water door (8) and a water seal tank B side heat exchanger water door (9) The other ends of the inlet water gate (8) and the inlet water gate (9) of the water-sealed tank side A heat exchanger and the water-sealed tank side B heat exchanger are respectively connected with the inlet of a water-sealed tank side A heat exchanger (12) arranged in a furnace bottom slag hopper water-sealed tank (11), the outlet of the water-sealed tank side A heat exchanger (12) is connected with the inlet of the high-temperature side (4-1) of the steam-water type semiconductor thermoelectric generator, the heat source of the water-sealed tank side A heat exchanger (12) is mainly derived from the radiation heat of coke slag falling from the positions of the furnace bottom slag hopper water-sealed tank (11) and the lower part (13) of the boiler hearth, the outlet of the high-temperature side (4-1) of the steam-water type semiconductor thermoelectric generator is connected with the hot medium inlet of a flash evaporator (22), the hot medium outlet of the flash evaporator (22) is connected with a sealing ring water flowing channel (10) arranged in the water-sealed tank (11) of the furnace bottom slag hopper water-sealed tank, a furnace bottom water-sealed groove water supply door (2) is arranged between the slag hopper cooling main water supply electric door (1) and a steam-water type semiconductor thermoelectric generator low-temperature side water supply door (3), the furnace bottom water-sealed groove water supply door (2) is connected with a sealing ring water flowing channel (10) in the water-sealed groove, a furnace bottom slag hopper side plate (14) is arranged on the outer side of the furnace bottom slag hopper water-sealed groove (11) and connected with a slag hopper cooling pool (6) and used for providing a heat source for the heat exchange tube (5) and a heat accumulator (21) arranged in the slag hopper cooling pool (6), and a cooled slag-water mixture is conveyed and discharged through a slag pump;
the flash evaporator (22) is provided with an organic working medium injection door (27), an outlet at the upper end of the flash evaporator (22) is connected with an inlet at the high-temperature side (23-1) of the organic working medium type semiconductor thermoelectric generator, one path of an outlet at the high-temperature side (23-1) of the organic working medium type semiconductor thermoelectric generator reserves a standby interface through an organic working medium standby door (28), the other path of the outlet is connected with a heat medium inlet of a condenser (24), a heat medium outlet of the condenser (24) is connected with an inlet of the heat accumulator (21), and an outlet of the heat accumulator (21) is connected with a lower end inlet of the flash evaporator (22);
the steam-water type semiconductor thermoelectric generator (4) is connected with a controller group (17) through a steam-water type semiconductor thermoelectric generator internal resistance (15) and a steam-water type semiconductor thermoelectric generator power output switch (16), an outlet of the controller group (17) is connected with a storage battery group (19) through a storage battery group energy storage connecting switch (18), and the other outlet of the controller group (17) is connected to a frequency converter (20); the organic working medium type semiconductor thermoelectric generator (23) is connected with a controller group (17) through an internal resistance (25) of the organic working medium type semiconductor thermoelectric generator and an electric power output switch (26) of the organic working medium type semiconductor thermoelectric generator, an outlet of the controller group (17) is connected with a storage battery group (19) through a storage battery group energy storage connecting switch (18), and the other outlet of the controller group (17) is connected to a frequency converter (20).
2. The thermoelectric power generation system of the boiler slag hopper heat source as claimed in claim 1, wherein the working medium in the organic working medium type semiconductor thermoelectric power generator system is an organic working medium with a critical temperature in the range of 35-140 ℃.
3. The thermoelectric power generation system of the boiler slag hopper heat source as claimed in claim 1, wherein the storage battery (19) is connected with a frequency converter (20) to provide power output according to the voltage type required by a user.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105716380A (en) * | 2016-04-15 | 2016-06-29 | 山西大学 | Thermal compensation type superheated steam coal drying system |
| CN109681284A (en) * | 2018-11-30 | 2019-04-26 | 山西大学 | Power-plant flue gas cogeneration is used for the system and control method of carbon dioxide capture |
| CN109742975A (en) * | 2018-12-23 | 2019-05-10 | 山西大学 | A kind of solar energy thermo-electric generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105716380A (en) * | 2016-04-15 | 2016-06-29 | 山西大学 | Thermal compensation type superheated steam coal drying system |
| CN109681284A (en) * | 2018-11-30 | 2019-04-26 | 山西大学 | Power-plant flue gas cogeneration is used for the system and control method of carbon dioxide capture |
| CN109742975A (en) * | 2018-12-23 | 2019-05-10 | 山西大学 | A kind of solar energy thermo-electric generation system |
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