CN210317417U - Coal-fired power generation system - Google Patents
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- CN210317417U CN210317417U CN201921276608.1U CN201921276608U CN210317417U CN 210317417 U CN210317417 U CN 210317417U CN 201921276608 U CN201921276608 U CN 201921276608U CN 210317417 U CN210317417 U CN 210317417U
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Abstract
The utility model provides a technical scheme provides a coal-fired power generation system, this system includes: the organic working medium circulation group comprises a circulation pump, an evaporator, a heat regenerator, a superheater, an expander and a condenser, the coal-fired boiler group comprises a boiler, a heater, a reheater, a high-temperature economizer and a low-temperature economizer are arranged in the boiler, and the supercritical carbon dioxide circulation group comprises a first supercritical carbon dioxide circulation group and a second supercritical carbon dioxide circulation group. The utility model discloses technical scheme's coal fired power generation system adopts two supercritical carbon dioxide circulations and coal fired boiler to combine, adopt the waste heat power generation of organic working medium cyclic utilization system, improved the generating efficiency and the economic nature of unit.
Description
Technical Field
The utility model relates to the technical field of power generation, especially, relate to a coal-fired power generation system.
Background
Coal-fired power generation is one of the main power supply modes in China, and still occupies the largest power generation share at present and in a quite long period of time in the future, but the coal-fired power generation is facing the severe situation of quality improvement, efficiency improvement and transformation development. In the long run, in order to meet the requirement of reducing carbon dioxide emission, on one hand, the development of a unit with higher parameters, namely the next generation of 700 ℃ grade ultra-supercritical unit, needs to be accelerated. However, this technical route requires a large amount of expensive nickel-based superalloy, and the unit cost is very high; on the other hand, a new coal-fired power generation technology needs to be innovatively developed on the basis of the existing 600 ℃ grade material and equipment manufacturing technology.
In recent years, the supercritical carbon dioxide circulation technology is developed rapidly, and the key technology is continuously broken through. The supercritical carbon dioxide circulating system is simple, compact in structure, high in efficiency and capable of being air-cooled, and can form a power generation system together with various heat sources. Therefore, the supercritical carbon dioxide cycle has good application prospects in the fields of thermal power generation, nuclear power generation, solar thermal power generation, waste heat power generation, geothermal power generation, biomass power generation and the like. The supercritical carbon dioxide circulation can also be integrated with a coal-fired boiler to replace a steam turbine unit to form a novel coal-fired power generation system, and the supercritical carbon dioxide circulation unit at the 600 ℃ level is expected to reach the power generation efficiency of the supercritical unit at the 700 ℃ level. However, in consideration of the characteristic of deep heat recovery of supercritical carbon dioxide circulation, the temperature of the working medium entering a heat source is high, and when the working medium is directly integrated with a coal-fired boiler, the exhaust gas temperature of the boiler is inevitably too high, and the thermal efficiency of the boiler is damaged, so that a proper circulation mode must be constructed in a targeted manner, and the problem needs to be solved urgently in developing a novel coal-fired power generation system.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, the to-be-solved technical problem of the present invention is to provide a novel high-efficiency coal-fired power generation system based on supercritical carbon dioxide circulation.
In order to solve the technical problem, the utility model provides a coal-fired power generation system, include: the system comprises an organic working medium circulation group, a coal-fired boiler group and a supercritical carbon dioxide circulation group;
the organic working medium circulation group comprises a circulation pump, an evaporator, a heat regenerator, a superheater, an expander and a condenser, wherein the outlet of the circulation pump is connected with an organic working medium inlet of the evaporator, an organic working medium outlet of the evaporator is connected with a high-pressure side inlet of the heat regenerator, a high-pressure side outlet of the heat regenerator is connected with an organic working medium inlet of the superheater, an organic working medium outlet of the superheater is connected with an inlet of the expander, an outlet of the expander is connected with a low-pressure side inlet of the heat regenerator, a low-pressure side outlet of the heat regenerator is connected with an inlet of the condenser, and an outlet of the condenser is connected with an inlet of the circulation pump;
the coal-fired boiler group comprises a boiler, and a heater, a reheater, a high-temperature economizer and a low-temperature economizer are arranged in the boiler;
the supercritical carbon dioxide circulation group comprises a first supercritical carbon dioxide circulation group and a second supercritical carbon dioxide circulation group, the first supercritical carbon dioxide circulation group comprises a first main compressor, a first low-temperature regenerator, a first high-pressure turbine, a low-pressure turbine, a first recompressor and a precooler, an outlet of the first main compressor is connected with a high-pressure side inlet of the first low-temperature regenerator, a high-pressure side outlet of the first low-temperature regenerator is connected with a high-pressure side inlet of the first high-temperature regenerator, a high-pressure side outlet of the first high-temperature regenerator is connected with a working medium side inlet of the high-temperature economizer, a working medium side outlet of the high-temperature economizer is connected with a working medium inlet of the heater, a working medium outlet of the heater is connected with an air inlet of the first high-pressure turbine, an air outlet of the first high-pressure turbine is connected with a working medium inlet of the reheater, the working medium outlet of the reheater is connected with the inlet of the low-pressure turbine, the outlet of the low-pressure turbine is connected with the low-pressure side inlet of the first high-temperature reheater, the low-pressure side outlet of the first high-temperature reheater is connected with the low-pressure side inlet of the first low-temperature reheater, the low-pressure side outlet of the first low-temperature reheater is connected with the carbon dioxide working medium inlet of the organic working medium circulating evaporator and the inlet of the first recompressor, the carbon dioxide working medium outlet of the evaporator is connected with the working medium inlet of the precooler, the working medium outlet of the precooler is connected with the inlet of the first main compressor, and the outlet of the first recompressor is connected with the high-pressure side inlet of the first high;
the second supercritical carbon dioxide circulation group comprises a second main compressor, a second low-temperature regenerator, a second high-pressure turbine and a second recompressor, wherein the outlet of the second main compressor is connected with the high-pressure side inlet of the second low-temperature regenerator, the high-pressure side outlet of the second low-temperature regenerator is connected with the high-pressure side inlet of the second high-temperature regenerator, the high-pressure side outlet of the second high-temperature regenerator is connected with the working medium side inlet of the low-temperature economizer, the working medium side outlet of the low-temperature economizer is connected with the air inlet of the second high-pressure turbine, the exhaust port of the second high-pressure turbine is connected with the low-pressure side inlet of the second high-temperature regenerator, the low-pressure side outlet of the second high-temperature regenerator is connected with the low-pressure side inlet of the second low-temperature regenerator, and the low-pressure side outlet of the second low-temperature regenerator is connected with the carbon dioxide working medium inlet of the superheater of the organic working medium circulation and, and a carbon dioxide working medium outlet of the superheater is connected with an inlet of the second main compressor, and an outlet of the second main compressor is connected with a high-pressure side inlet of the second high-temperature regenerator.
Optionally, the coal-fired boiler further comprises an air preheater, a primary air outlet and a secondary air outlet of the air preheater are connected with the hearth of the boiler, and a smoke exhaust outlet of the air preheater is connected with a smoke inlet of the superheater.
Optionally, the air preheater is an air-cooled preheater or a water-cooled preheater.
Optionally, the coal-fired boiler is a supercritical boiler or an ultra supercritical boiler.
Optionally, the first supercritical carbon dioxide circulation group and the second supercritical carbon dioxide circulation group are both arranged at a high position. The utility model discloses technical scheme "high-order arrange" mean to arrange in coal fired boiler height more than the third.
Optionally, the organic working medium in the organic working medium circulation group is selected from one of freon, isobutane, pentafluoropropane and tetrafluoroethane.
Compared with the prior art, the utility model discloses technical scheme's coal-fired power generation system has following beneficial effect:
the coal-fired power generation system comprises a coal-fired boiler group, a supercritical carbon dioxide circulation group and an organic working medium circulation group, the heat generated by the system is fully utilized, and the power generation efficiency of the unit is improved.
The first supercritical carbon dioxide circulation group and the second supercritical carbon dioxide circulation group are arranged in a high position, so that the length and the pressure loss of the working medium pipeline are reduced.
The coal-fired power generation system can adopt the materials of the existing ultra-supercritical steam turbine set with the temperature of 600 ℃, so that the equipment cost can be ensured to be equivalent to that of the existing ultra-supercritical steam turbine set, meanwhile, the high efficiency advantage of the supercritical carbon dioxide circulation is fully exerted, the power generation efficiency of the set is improved, and the power generation cost of the set is superior to that of the existing ultra-supercritical steam turbine set.
Two supercritical carbon dioxide circulating groups are adopted, the heat of the exhaust smoke of the boiler is fully absorbed, the heat efficiency of the boiler is ensured, the waste heat of the system is adopted for power generation, the power generation efficiency and the economical efficiency of the unit are further improved, and the power generation efficiency of the 700-DEG C grade supercritical steam turbine unit can be achieved by adopting the unit with the temperature not higher than 630 ℃.
Under the air cooling condition, the utility model discloses a unit still can keep high efficiency, is showing the ultra supercritical steam turbine unit who is superior to equal parameter.
Drawings
FIG. 1 is a schematic structural view of a coal-fired power generation system according to an embodiment of the present invention;
wherein: 1-a first main compressor, 2-a first low temperature regenerator, 3-a first high temperature regenerator, 4-a first high pressure turbine, 5-a low pressure turbine, 6-a first recompressor, 7-a precooler, 11-a second main compressor, 12-a second low temperature regenerator, 13-a second high temperature regenerator, 14-a second high pressure turbine, 15-a second recompressor, 21-a circulating pump, 22-an evaporator, 23-a regenerator, 24-a superheater, 25-an expander, 26-a condenser, 31-a boiler, 32-a heater, 33-a reheater, 34-a high temperature economizer, 35-a low temperature economizer, 36-an air preheater, 100-a coal-fired boiler group, 200-a first supercritical carbon dioxide cycle, 300-second supercritical carbon dioxide circulation and 400-organic working medium circulation.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the following examples.
As shown in fig. 1, the coal-fired power generation system of the embodiment of the present invention includes: an organic working medium circulation group 400, a coal-fired boiler group 300 and a supercritical carbon dioxide circulation group.
The organic working medium circulation group 400 comprises a circulation pump 21, an evaporator 22, a heat regenerator 23, a superheater 24, an expansion machine 25 and a condenser 26, an outlet of the circulation pump 21 is connected with an organic working medium inlet of the evaporator 22, an organic working medium outlet of the evaporator 22 is connected with a high-pressure side inlet of the heat regenerator 23, a high-pressure side outlet of the heat regenerator 23 is connected with an organic working medium inlet of the superheater 24, an organic working medium outlet of the superheater 24 is connected with an inlet of the expansion machine 25, an outlet of the expansion machine 25 is connected with a low-pressure side inlet of the heat regenerator 23, a low-pressure side outlet of the heat regenerator 23 is connected with an inlet of the condenser 26, and an outlet of the condenser.
The coal-fired boiler group 100 comprises a boiler 31, a heater 32, a reheater 33, a high-temperature economizer 34, a low-temperature economizer 35 and an air preheater 36 are arranged in the boiler 31, a primary air outlet and a secondary air outlet of the air preheater 36 are connected with a hearth of the boiler 31, and a smoke exhaust outlet of the air preheater 36 is connected with a smoke inlet of a superheater 24.
The supercritical carbon dioxide circulation group comprises a first supercritical carbon dioxide circulation group 200 and a second supercritical carbon dioxide circulation group 300, the first supercritical carbon dioxide circulation group 200 comprises a first main compressor 1, a first low-temperature regenerator 2, a first high-temperature regenerator 3, a first high-pressure turbine 4, a low-pressure turbine 5, a first recompressor 6 and a precooler 7, an outlet of the first main compressor 1 is connected with a high-pressure side inlet of the first low-temperature regenerator 2, a high-pressure side outlet of the first low-temperature regenerator 2 is connected with a high-pressure side inlet of the first high-temperature regenerator 3, a high-pressure side outlet of the first high-temperature regenerator 3 is connected with a working medium side inlet of a high-temperature economizer 34, a working medium side outlet of the high-temperature economizer 34 is connected with a working medium inlet of a heater 32, a working medium outlet of the heater 32 is connected with an air inlet of the first high-pressure turbine 4, an air outlet of the first high-pressure turbine 4 is, the working medium outlet of the reheater 33 is connected with the inlet of the low-pressure turbine 5, the outlet of the low-pressure turbine 5 is connected with the low-pressure side inlet of the first high-temperature reheater 3, the low-pressure side outlet of the first high-temperature reheater 3 is connected with the low-pressure side inlet of the first low-temperature reheater 2, the low-pressure side outlet of the first low-temperature reheater 2 is connected with the carbon dioxide working medium inlet of the evaporator 22 of the organic working medium cycle 400 and the inlet of the first recompressor 6, the carbon dioxide working medium outlet of the evaporator 22 is connected with the working medium inlet of the precooler 7, the working medium outlet of the precooler 7 is connected with the inlet of the first main compressor 6, and the outlet of the first recompress.
The second supercritical carbon dioxide cycle group 300 comprises a second main compressor 11, a second low-temperature regenerator 12, a second high-temperature regenerator 13, a second high-pressure turbine 14 and a second recompressor 15, wherein the outlet of the second main compressor 11 is connected with the high-pressure side inlet of the second low-temperature regenerator 12, the high-pressure side outlet of the second low-temperature regenerator 12 is connected with the high-pressure side inlet of the second high-temperature regenerator 13, the high-pressure side outlet of the second high-temperature regenerator 13 is connected with the working medium side inlet of a low-temperature economizer 35, the working medium side outlet of the low-temperature economizer 35 is connected with the air inlet of the second high-pressure turbine 14, the exhaust port of the second high-pressure turbine 14 is connected with the low-pressure side inlet of the second high-temperature regenerator 13, the low-pressure side outlet of the second high-temperature regenerator 13 is connected with the low-pressure side inlet of the second low-temperature regenerator 12, the low-pressure side outlet of the second low-temperature regenerator 12 is connected with the carbon dioxide working, the carbon dioxide working medium outlet of the superheater 24 is connected with the inlet of the second main compressor 11, and the outlet of the second main compressor 11 is connected with the high-pressure side inlet of the second high-temperature regenerator 13.
The first supercritical carbon dioxide circulation group 200 and the second supercritical carbon dioxide circulation group 300 are arranged at a high position, so that the length and pressure loss of a working medium pipeline are reduced.
In this embodiment, the organic working medium in the organic working medium circulation group 400 may be freon, isobutane, pentafluoropropane, tetrafluoroethane, or the like.
In operation, the first supercritical carbon dioxide cycle bank 200 is at a temperature of no more than 650 ℃ and a pressure of no more than 35 MPa. The temperature range of the second supercritical carbon dioxide circulation group 300 is 60-550 ℃, and the pressure is not more than 35 MPa. The temperature of the organic working medium circulation group 400 is not more than 130 ℃. The secondary air temperature of the air preheater 36 is 380 ℃ or higher, and the exhaust gas temperature of the air preheater 36 is 120 ℃ or lower.
The utility model discloses absorption seawater desalination goes on with working method that closed circulation power generation system pressed:
the heat generated by combustion in the hearth of the boiler 31 is transferred to the working medium of the first supercritical carbon dioxide circulation group 200 through the heater 32 and the reheater 33, the exhaust gas from the hearth firstly passes through the high-temperature economizer 34 to transfer the heat to the working medium of the first supercritical carbon dioxide circulation group 200, then passes through the low-temperature economizer 35 to release the heat to the working medium of the second supercritical carbon dioxide circulation group 300, and then enters the air preheater 36, the primary air and the secondary air respectively enter the air preheater 36, then the primary air and the pulverized coal are mixed to enter the hearth, the secondary air directly enters the hearth, the temperature of the secondary air is about 400 ℃, and the exhaust gas from the air preheater 36 enters the superheater 24 of the organic working medium circulation group 400 to heat the organic working medium.
In the first supercritical carbon dioxide circulation group 200, a split-flow recompression single reheating circulation mode is adopted, a carbon dioxide working medium enters a first main compressor 1 to be pressurized to 32MPa, the carbon dioxide working medium at the outlet of the first main compressor 1 absorbs the heat of a low-temperature section of the working medium discharged by a low-pressure turbine 5 through a first low-temperature heat regenerator 2, then join with first 6 export working mediums of recompressor and get into first high temperature regenerator 3 and absorb the high temperature section heat of low pressure turbine 5 exhaust working medium, the working medium that first high temperature regenerator 3 came out absorbs the heat and reaches 620 ℃ through high temperature economizer 34, heater 32, reentrant first high pressure turbine 4 does work, the working medium that first high pressure turbine 4 discharged heats to 620 ℃ through reheater 33, reentrant low pressure turbine 5 does work, low pressure turbine 5 exhausts and releases the heat through first high temperature regenerator 3, first low temperature regenerator 2 in proper order, divide into two tunnel: one path enters the first recompressor to be pressurized to 32MPa, and the other path enters the evaporator 22 and the precooler 7 to be cooled and then returns to the first main compressor 1.
In the second supercritical carbon dioxide cycle group 300, a split-flow recompression cycle mode is adopted, a carbon dioxide working medium enters the second main compressor 11 to be pressurized to 32MPa, the carbon dioxide working medium at the outlet of the second main compressor 11 absorbs the low-temperature section heat of the working medium discharged by the second high-pressure turbine 14 through the second low-temperature heat regenerator 12, then the carbon dioxide working medium joins the working medium at the outlet of the second recompressor 15 and enters the second high-temperature heat regenerator 13 to absorb the high-temperature section heat of the working medium discharged by the second high-pressure turbine 14, the working medium discharged by the second high-temperature heat regenerator 13 absorbs the heat to 525 ℃ through the low-temperature economizer 35, then the working medium enters the second high-pressure turbine 14 to do work, the exhaust gas of the second high-pressure turbine 14 sequentially releases the heat through the second high-temperature heat regenerator 13 and: one path enters the second recompressor 15 to be pressurized to 32MPa, and the other path enters the reheater 33 to release heat and then returns to the second main compressor 11.
In the organic working medium cycle 400, a Rankine cycle with heat recovery is adopted, an organic working medium (such as R245fa) enters the circulating pump 21 and is pressurized to 0.42MPa, the organic working medium at the outlet of the circulating pump 21 sequentially passes through the evaporator 22, the heat regenerator 23 and the superheater 24 to absorb heat to 110 ℃, then enters the expander 25 to do work, the organic working medium discharged by the expander 25 passes through the heat regenerator 23 to release waste heat, then enters the condenser 26 to be condensed, and finally returns to the circulating pump 21.
It should be noted that, the utility model discloses the equipment that technical scheme involved all belongs to existing equipment, in this embodiment, specifically adopts following equipment: a first main compressor (axial flow carbon dioxide compressor), a first low-temperature regenerator (printed circuit board heat exchanger), a first high-pressure turbine (axial flow carbon dioxide turbine), a low-pressure turbine (axial flow carbon dioxide turbine), a first recompressor (axial flow carbon dioxide compressor), a precooler (tube cooler), a second main compressor (axial flow carbon dioxide compressor), a second low-temperature regenerator (printed circuit board heat exchanger), a second high-pressure turbine (axial flow carbon dioxide turbine), a second recompressor (axial flow carbon dioxide compressor), a circulating pump (centrifugal pump), an evaporator (shell-and-tube heat exchanger), a reheater (shell-and-tube heat exchanger), a superheater (shell-and-tube heat exchanger), an expander (, a condenser (a pipe cooler), a boiler (a tower boiler), a heater (a stainless steel high-temperature pipe heater), a reheater (a stainless steel high-temperature pipe reheater), a high-temperature economizer (a stainless steel pipe economizer), a low-temperature economizer (an alloy steel pipe economizer), and an air preheater (a rotary air preheater).
The coal-fired power generation system of the embodiment is used for generating power, the net generating efficiency can reach more than 48 percent (LHV), the net generating efficiency is 2-3 percent higher than that of the existing supercritical steam turbine generator unit with the temperature parameter of 620 ℃, and the efficiency is close to that of the supercritical steam turbine generator unit with the temperature of 700 ℃. The power generation system in the embodiment can adopt the existing material of the supercritical steam turbine generator unit with the temperature parameter of 620 ℃, does not need to use a higher-grade material, has the advantages of system simplification and compact structure of supercritical carbon dioxide circulation, and has good economic advantage in the aspect of equipment manufacturing cost.
While specific embodiments of the present invention have been described in detail, it will be appreciated that modifications and variations can be made by persons skilled in the art in light of the above teachings without inventive faculty. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (6)
1. A coal fired power generation system, comprising: the system comprises an organic working medium circulation group, a coal-fired boiler group and a supercritical carbon dioxide circulation group;
the organic working medium circulation group comprises a circulation pump, an evaporator, a heat regenerator, a superheater, an expander and a condenser, wherein the outlet of the circulation pump is connected with an organic working medium inlet of the evaporator, an organic working medium outlet of the evaporator is connected with a high-pressure side inlet of the heat regenerator, a high-pressure side outlet of the heat regenerator is connected with an organic working medium inlet of the superheater, an organic working medium outlet of the superheater is connected with an inlet of the expander, an outlet of the expander is connected with a low-pressure side inlet of the heat regenerator, a low-pressure side outlet of the heat regenerator is connected with an inlet of the condenser, and an outlet of the condenser is connected with an inlet of the circulation pump;
the coal-fired boiler group comprises a boiler, and a heater, a reheater, a high-temperature economizer and a low-temperature economizer are arranged in the boiler;
the supercritical carbon dioxide circulation group comprises a first supercritical carbon dioxide circulation group and a second supercritical carbon dioxide circulation group, the first supercritical carbon dioxide circulation group comprises a first main compressor, a first low-temperature regenerator, a first high-pressure turbine, a low-pressure turbine, a first recompressor and a precooler, an outlet of the first main compressor is connected with a high-pressure side inlet of the first low-temperature regenerator, a high-pressure side outlet of the first low-temperature regenerator is connected with a high-pressure side inlet of the first high-temperature regenerator, a high-pressure side outlet of the first high-temperature regenerator is connected with a working medium side inlet of the high-temperature economizer, a working medium side outlet of the high-temperature economizer is connected with a working medium inlet of the heater, a working medium outlet of the heater is connected with an air inlet of the first high-pressure turbine, an air outlet of the first high-pressure turbine is connected with a working medium inlet of the reheater, the working medium outlet of the reheater is connected with the inlet of the low-pressure turbine, the outlet of the low-pressure turbine is connected with the low-pressure side inlet of the first high-temperature reheater, the low-pressure side outlet of the first high-temperature reheater is connected with the low-pressure side inlet of the first low-temperature reheater, the low-pressure side outlet of the first low-temperature reheater is connected with the carbon dioxide working medium inlet of the organic working medium circulating evaporator and the inlet of the first recompressor, the carbon dioxide working medium outlet of the evaporator is connected with the working medium inlet of the precooler, the working medium outlet of the precooler is connected with the inlet of the first main compressor, and the outlet of the first recompressor is connected with the high-pressure side inlet of the first high;
the second supercritical carbon dioxide circulation group comprises a second main compressor, a second low-temperature regenerator, a second high-pressure turbine and a second recompressor, wherein the outlet of the second main compressor is connected with the high-pressure side inlet of the second low-temperature regenerator, the high-pressure side outlet of the second low-temperature regenerator is connected with the high-pressure side inlet of the second high-temperature regenerator, the high-pressure side outlet of the second high-temperature regenerator is connected with the working medium side inlet of the low-temperature economizer, the working medium side outlet of the low-temperature economizer is connected with the air inlet of the second high-pressure turbine, the exhaust port of the second high-pressure turbine is connected with the low-pressure side inlet of the second high-temperature regenerator, the low-pressure side outlet of the second high-temperature regenerator is connected with the low-pressure side inlet of the second low-temperature regenerator, and the low-pressure side outlet of the second low-temperature regenerator is connected with the carbon dioxide working medium inlet of the superheater of the organic working medium circulation and, and a carbon dioxide working medium outlet of the superheater is connected with an inlet of the second main compressor, and an outlet of the second main compressor is connected with a high-pressure side inlet of the second high-temperature regenerator.
2. The coal-fired power generation system of claim 1, wherein the coal-fired boiler further comprises an air preheater, a primary air outlet and a secondary air outlet of the air preheater are connected with a hearth of the boiler, and a smoke exhaust outlet of the air preheater is connected with a smoke inlet of the superheater.
3. The coal-fired power generation system of claim 2, wherein the air preheater is an air-cooled preheater or a water-cooled preheater.
4. The coal-fired power generation system of claim 1, wherein the coal-fired boiler is a supercritical boiler or an ultra supercritical boiler.
5. The coal-fired power generation system of claim 1, wherein the first and second supercritical carbon dioxide cycle groups are in an elevated arrangement.
6. The coal-fired power generation system of claim 1, wherein the organic working fluid in the organic working fluid cycle group is selected from one of freon, isobutane, pentafluoropropane and tetrafluoroethane.
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| CN114777103A (en) * | 2022-05-25 | 2022-07-22 | 西安热工研究院有限公司 | Waste heat utilization boiler system and steam turbine power generation system with same |
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| CN114777103A (en) * | 2022-05-25 | 2022-07-22 | 西安热工研究院有限公司 | Waste heat utilization boiler system and steam turbine power generation system with same |
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