CN109944652A - Supercritical carbon dioxide circulating flue gas waste heat recycles coal generating system and operation method - Google Patents
Supercritical carbon dioxide circulating flue gas waste heat recycles coal generating system and operation method Download PDFInfo
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Abstract
It include main compressor, recompression machine, forecooler, cryogenic regenerator, medium temperature regenerator, high temperature regenerator, boiler, high pressure turbine, intermediate pressure turbine, low pressure turbine the invention discloses a kind of supercritical carbon dioxide circulating flue gas waste heat recycling coal generating system and operation method, the system；By arrangement overheat air cooling wall and middle pressure reheater shared radiation of burner hearth thermic load in boiler furnace, overheat supercritical carbon dioxide overtemperature is prevented；The present invention from medium temperature regenerator outlet manifold part medium temperature supercritical carbon dioxide working medium enter boiler after vertical well gas flue high-temperature flue gas heat exchanger absorb high-temperature flue gas heat, from cryogenic regenerator outlet manifold part, low temperature supercritical carbon dioxide working medium enters boiler tail shunting flue medium temperature flue gas heat-exchange unit absorption medium temperature flue gas heat, from main compressor outlet manifold part, low temperature supercritical carbon dioxide working medium enters boiler back end ductwork low-temperature flue gas heat exchanger absorption low-temperature flue gas heat, to reduce exhaust gas temperature, boiler efficiency is improved.
Description
Technical field
The present invention relates to coal-fired power generator set fields, and in particular to a kind of supercritical carbon dioxide circulating flue gas waste heat recycling
Coal generating system and operation method.
Background technique
With rapid development of economy sustainable growth, China is sure to occupy global energy for continuous 17 years and increases list world energy sources demand
It is first.Since China's fossil energy structure is seriously uneven, coal is always the main body of China's non-renewable energy consumption.Fired power generating unit is
The lavish consumer of coal in China, annual consumption of coal account for about the half of national consumption of coal total amount.Therefore, based on fire coal
Thermal power generation be still the main generation mode in China.
In recent years, China by using high capacity high parameter unit, various combined cycles, improve operation level, to press greatly
The modes such as small closing low capacity poor efficiency unit achieve significant progress in thermal power industry, thermoelectricity technological progress also from
The modes such as initial conditions, steam reheating are improved to change to directions such as full working scope operation, waste heat deep exploitations.Therefore, change thermoelectricity hair
Thinking is opened up, thermal power generating technology is reformed, improves thermoelectricity generating efficiency, is of great significance to China's energy-saving and emission-reduction work.
Supercritical carbon dioxide power cycle is by the features such as its energy density is big, system structure is compact, cycle efficieny is high.
Carbon dioxide is as a kind of novel working medium, and nontoxic, non-combustible, corrosivity is small, thermal stability, and critical parameters are low；Supercriticality
Carbon dioxide with the physical characteristic of liquids and gases, density is big, viscosity is small, fluid ability is strong, heat transfer efficiency is high, does work
Ability is strong.Carbon dioxide physical property is violent in Near The Critical Point variation, and when close to critical point, density be increased dramatically, and compressibility subtracts
Small, compressor wasted work reduces, and system circulation efficiency is higher.Supercritical carbon dioxide circulating technology has good inheritance, can base
It is realized in existing material, avoids exploitation high temperature resistant nickel base alloy material.Supercritical carbon dioxide density is high, and size is smaller, knot
Structure is compact, and system unit is less, and initial cost and maintenance cost are lower.
Therefore, supercritical carbon dioxide power cycle is expected to replace Steam Power Circulation, greatly improves coal fired power generation efficiency.
And since boiler furnace radiant heat load is higher, the heat absorption load of overheat carbon dioxide in the boiler is lower, and arranges in burner hearth
Only arrange that single overheat air cooling wall will lead to overheat carbon dioxide overtemperature and influence pot to cause tube metal wall temperature overtemperature
Furnace safe operation, so needing to carry out reasonable Arrangement to the radiation heating-surface in boiler furnace；Low temperature supercritical carbon dioxide warp
Cryogenic regenerator, medium temperature regenerator and the heating of high temperature regenerator, cause boiler inlet supercritical carbon dioxide temperature higher, can not
Boiler back end ductwork flue gas heat is made full use of, causes exhaust gas temperature excessively high, boiler efficiency decline, so overcritical dioxy
Change carbon power circulation system configuration to need to be advanced optimized, urgent need is improved by reasonable Arrangement heater, Mist heat recovering
Cycle efficieny.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, the purpose of the present invention is to provide a kind of supercritical carbon dioxides
Circulating flue gas waste heat recycles coal generating system and operation method, presses reheater and overheat in arrangement above and below boiler furnace inside
Be gas-cooled wall, shared radiation of burner hearth thermic load, reduces overheat carbon dioxide caloric receptivity, to avoid working medium and tube wall temperature super
Temperature；The system shunts part medium temperature supercritical carbon dioxide from high temperature regenerator cold side working medium entrances and absorbs high-temperature flue gas heat,
Boiler medium temperature flue gas heat is absorbed from cryogenic regenerator outlet manifold part low temperature supercritical carbon dioxide, is exported from main compressor
It shunts part low temperature supercritical carbon dioxide and absorbs boiler low-temperature fume heat, reduce exhaust gas temperature, realize flue gas heat
Cascade utilization, improve boiler efficiency, and then improve generating efficiency.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of supercritical carbon dioxide circulating flue gas waste heat recycling coal generating system, including being sequentially connected logical forecooler
17, main compressor 1, cryogenic regenerator 2, medium temperature regenerator 3, high temperature regenerator 4, economizer 9, overheat air cooling wall 10, high pressure are saturating
Flat 8, middle pressure reheater 11, intermediate pressure turbine 7, low pressure reheater 12 and low pressure turbine 6；It further include recompression machine 5, rotary air
Preheater 16, high-temperature flue gas heat exchanger 13, medium temperature flue gas heat-exchange unit 14 and low-temperature flue gas heat exchanger 15；Low pressure turbine 6 exhaust according to
The secondary heat release in high temperature regenerator 4, medium temperature regenerator 3 and cryogenic regenerator 2,1 low exit temperature working medium of main compressor is successively low
It absorbs heat in warm regenerator 2, medium temperature regenerator 3 and high temperature regenerator 4；1 outlet manifold cryogenic fluid of main compressor passes through low temperature cigarette
Gas heat exchanger 15 returns to 3 entrance of medium temperature regenerator after absorbing heat；2 outlet manifold cryogenic fluid of cryogenic regenerator is changed by medium temperature flue gas
Hot device 14 returns to 4 entrance of high temperature regenerator after absorbing heat；4 inlet distribution part medium temperature working medium of high temperature regenerator is changed by high-temperature flue gas
Hot device 13 returns to 9 entrance of economizer after absorbing heat；Cold air enters boiler after absorbing heat in rotary regenerative air preheater 16；Main compression
The outlet of machine 1 is connected with 2 cold side working medium entrances of cryogenic regenerator and 15 entrance of low-temperature flue gas heat exchanger simultaneously；Cryogenic regenerator 2
Cold side sender property outlet simultaneously with low-temperature flue gas heat exchanger 15 outlet, 3 cold side of 14 entrance of medium temperature flue gas heat-exchange unit and medium temperature regenerator
Working medium entrances are connected；4 cold side working medium entrances of high temperature regenerator simultaneously with 3 cold side sender property outlet of medium temperature regenerator, medium temperature flue gas
The outlet of heat exchanger 14, the outlet of recompression machine 5 are connected with 13 entrance of high-temperature flue gas heat exchanger, and 4 cold side working medium of high temperature regenerator goes out
Mouth is connected with 13 entrance of high-temperature flue gas heat exchanger and 9 entrance of economizer simultaneously；5 entrance of recompression machine simultaneously with 17 work of forecooler
Matter entrance is connected with 2 hot side sender property outlet of cryogenic regenerator.
The overheat air cooling wall 10, middle pressure reheater 11 are arranged in burner hearth, and low pressure reheater 12 is arranged in horizontal flue, saves
Coal device 9 and high-temperature flue gas heat exchanger 13 are arranged in vertical well gas flue, and rotary regenerative air preheater 16 and medium temperature flue gas heat-exchange unit 14 divide
It is not arranged in portion flow flue two sides, low-temperature flue gas heat exchanger 15 is arranged in back-end ductwork, and overall structure has back-end ductwork
The Π type boiler of part flow arrangement.
The overheat air cooling wall 10 and middle pressure reheater 11 are arranged in inside boiler furnace, and shared radiation of burner hearth heat is negative
Lotus.
The 4 cold side working medium entrances of high temperature regenerator shunt part medium temperature working medium and enter the heat absorption of high-temperature flue gas heat exchanger 13
Afterwards, continue to absorb heat into economizer 9.
The entrance flue gas temperature of the low pressure reheater 12 is 630 DEG C.
The 2 cold side sender property outlet of cryogenic regenerator shunts part cryogenic fluid in portion flow flue medium temperature flue gas heat exchange
Device 14 absorbs flue gas heat, returns to 4 cold side working medium entrances of high temperature regenerator, for reducing exhaust gas temperature, reduces boiler exhaust gas damage
It loses.
The 1 outlet manifold cryogenic fluid of main compressor absorbs flue gas heat in back-end ductwork low-temperature flue gas heat exchanger 15,
3 cold side working medium entrances of medium temperature regenerator are returned, for further decreasing exhaust gas temperature, reduce boiler exhaust gas loss.
The working medium that the system uses is supercritical carbon dioxide.
A kind of operation side of supercritical carbon dioxide circulating flue gas waste heat recycling coal generating system described in above-mentioned one
Method, after working medium is pressurized in main compressor 1, successively in cryogenic regenerator 2, medium temperature regenerator 3, high temperature regenerator 4 and boiler
It absorbs heat in internal economizer 9 and overheat air cooling wall 10, temperature enters 8 demi-inflation of high pressure turbine after increasing and does work, after acting
Temperature and pressure all reduces, and working medium is again introduced into boiler and absorbs heat in middle pressure reheater 11, temperature enter after improving again in press
7 demi-inflation of turbine acting, temperature and pressure all reduces after acting, and working medium is again introduced into boiler and inhales in low pressure reheater 12
Heat, temperature improve again after enter the complete expansion work of low pressure turbine 6, low pressure turbine 6 exhaust successively high temperature regenerator 4, in
In warm regenerator 3 and cryogenic regenerator 2 after heat release, be split into two strands, a stock-traders' know-how recompress after machine 5 is pressurized with high temperature regenerator 4
The mixing of cold side input port working medium, another stock are again introduced into main compressor 1 successively in forecooler 17 after cooling, complete closed circulation；
1 outlet manifold working medium of main compressor returns to 2 cold side sender property outlet of cryogenic regenerator after the heat absorption of low-temperature flue gas heat exchanger 15；Low temperature
2 cold side sender property outlet of regenerator shunts working medium return 4 cold side working medium of high temperature regenerator after the heat absorption of medium temperature flue gas heat-exchange unit 14 and enters
Mouthful；Cold air enters boiler furnace auxiliary combustion after absorbing heat in rotary regenerative air preheater 16.
Compared to the prior art, the invention has the following advantages that
1 present invention can make full use of low-temperature flue gas heat in boiler, reduce exhaust gas temperature, and realize the ladder of energy
Grade utilizes, and improves boiler efficiency.
Radiation heating-surface in 2 reasonable Arrangement burner hearths of the present invention, thus reasonable distribution overheat carbon dioxide and single reheat two
Radiant heat absorption of the carbonoxide in burner hearth avoids air cooling wall tube wall temperature overtemperature.
3 present invention recompress supercritical carbon dioxide power cycle configuration, system circulation efficiency using three-level backheat reheating
It is higher.
Detailed description of the invention
Fig. 1 is that a kind of supercritical carbon dioxide circulating flue gas waste heat of the present invention recycles coal generating system schematic diagram.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of supercritical carbon dioxide circulating flue gas waste heat recycles coal generating system, including it is sequentially connected
Logical forecooler 17, main compressor 1, cryogenic regenerator 2, medium temperature regenerator 3, high temperature regenerator 4, economizer 9, overheat air cooling wall
10, high pressure turbine 8, middle pressure reheater 11, intermediate pressure turbine 7, low pressure reheater 12 and low pressure turbine 6；Further include recompression machine 5,
Rotary regenerative air preheater 16, high-temperature flue gas heat exchanger 13, medium temperature flue gas heat-exchange unit 14 and low-temperature flue gas heat exchanger 15；Low pressure is saturating
The flat 6 exhaust successively heat release in high temperature regenerator 4, medium temperature regenerator 3 and cryogenic regenerator 2,1 low exit temperature working medium of main compressor
Successively absorb heat in cryogenic regenerator 2, medium temperature regenerator 3 and high temperature regenerator 4；1 outlet manifold cryogenic fluid of main compressor warp
It crosses after low temperature flue gas heat-exchange unit 15 absorbs heat and returns to 3 entrance of medium temperature regenerator；During 2 outlet manifold cryogenic fluid of cryogenic regenerator passes through
Warm flue gas heat-exchange unit 14 returns to 4 entrance of high temperature regenerator after absorbing heat；4 inlet distribution part medium temperature working medium of high temperature regenerator is through excessively high
Warm flue gas heat-exchange unit 13 returns to 9 entrance of economizer after absorbing heat；Cold air enters pot after absorbing heat in rotary regenerative air preheater 16
Furnace；The outlet of main compressor 1 is connected with 2 cold side working medium entrances of cryogenic regenerator and 15 entrance of low-temperature flue gas heat exchanger simultaneously；It is low
Warm 2 cold side sender property outlet of regenerator is returned with the outlet of low-temperature flue gas heat exchanger 15,14 entrance of medium temperature flue gas heat-exchange unit and medium temperature simultaneously
Hot 3 cold side working medium entrances of device are connected；4 cold side working medium entrances of high temperature regenerator simultaneously with 3 cold side sender property outlet of medium temperature regenerator,
The outlet of medium temperature flue gas heat-exchange unit 14, the outlet of recompression machine 5 are connected with 13 entrance of high-temperature flue gas heat exchanger, and high temperature regenerator 4 is cold
Side sender property outlet is connected with 13 entrance of high-temperature flue gas heat exchanger and 9 entrance of economizer simultaneously；5 entrance of recompression machine simultaneously with it is pre-
17 working medium entrances of cooler are connected with 2 hot side sender property outlet of cryogenic regenerator.
As the preferred embodiment of the present invention, overheat air cooling wall 10, middle pressure reheater 11 are arranged in burner hearth, low pressure reheating
Device 12 is arranged in horizontal flue, and economizer 9 and high-temperature flue gas heat exchanger 13 are arranged in vertical well gas flue, rotary regenerative air preheater 16
It is respectively arranged with medium temperature flue gas heat-exchange unit 14 in portion flow flue two sides, low-temperature flue gas heat exchanger 15 is arranged in back-end ductwork
Interior, overall structure has the Π type boiler of back-end ductwork part flow arrangement.
As the preferred embodiment of the present invention, overheat air cooling wall 10 and middle pressure reheater 11 are arranged in boiler furnace
Portion, shared radiation of burner hearth thermic load.
As the preferred embodiment of the present invention, 4 cold side working medium entrances of high temperature regenerator shunt part medium temperature working medium and enter
After high-temperature flue gas heat exchanger 13 absorbs heat, continue to absorb heat into economizer 9.
As the preferred embodiment of the present invention, the entrance flue gas temperature of low pressure reheater 12 is 630 DEG C.
As the preferred embodiment of the present invention, 2 cold side sender property outlet of cryogenic regenerator shunts part cryogenic fluid in tail
Part flow flue medium temperature flue gas heat-exchange unit 14 absorbs flue gas heat, 4 cold side working medium entrances of high temperature regenerator is returned to, for the row of reduction
Smoke temperature degree reduces boiler exhaust gas loss.
As the preferred embodiment of the present invention, 1 outlet manifold cryogenic fluid of main compressor is in back-end ductwork low-temperature flue gas
Heat exchanger 15 absorbs flue gas heat, returns to 3 cold side working medium entrances of medium temperature regenerator, for further decreasing exhaust gas temperature, reduces
Boiler exhaust gas loss.
As the preferred embodiment of the present invention, the working medium that system uses is supercritical carbon dioxide.
As shown in Figure 1, a kind of fortune of supercritical carbon dioxide circulating flue gas waste heat recycling coal generating system of the invention
Row method, after working medium is pressurized in main compressor 1, successively cryogenic regenerator 2, medium temperature regenerator 3, high temperature regenerator 4 and
It absorbs heat in the economizer 9 and overheat air cooling wall 10 of boiler internal, temperature enters 8 demi-inflation of high pressure turbine after increasing and does work, and does
Temperature and pressure all reduces after function, and working medium is again introduced into boiler and absorbs heat in middle pressure reheater 11, and temperature enters after improving again
7 demi-inflation of intermediate pressure turbine acting, temperature and pressure all reduces after acting, and working medium is again introduced into boiler in low pressure reheater 12
Heat absorption, temperature improves again after enter the complete expansion work of low pressure turbine 6, low pressure turbine 6 be vented successively high temperature regenerator 4,
In medium temperature regenerator 3 and cryogenic regenerator 2 after heat release, be split into two strands, a stock-traders' know-how recompress after machine 5 is pressurized with high temperature regenerator
The mixing of 4 cold side input port working medium, another stock are again introduced into main compressor 1 successively in forecooler 17 after cooling, complete closure and follow
Ring；1 outlet manifold working medium of main compressor returns to 2 cold side sender property outlet of cryogenic regenerator after the heat absorption of low-temperature flue gas heat exchanger 15；
2 cold side sender property outlet of cryogenic regenerator shunts working medium and returns to 4 cold side work of high temperature regenerator after the heat absorption of medium temperature flue gas heat-exchange unit 14
Matter entrance；Cold air enters boiler furnace auxiliary combustion after absorbing heat in rotary regenerative air preheater 16.
The present invention absorbs radiation of burner hearth heat by overheat carbon dioxide and single reheat carbon dioxide jointly, reduces working medium
Rotating jet flow temperature guarantees boiler safety so that air cooling wall metal material temperature be made not exceed the limiting temperature of metal heatproof
Operation.Heat is absorbed in high-temperature flue gas heat exchanger using medium temperature regenerator outlet manifold carbon dioxide working medium, reduces boiler row
Smoke temperature degree reduces heat exchange irreversible loss, while shunting the overcritical dioxy of part low temperature from cryogenic regenerator cold side sender property outlet
Changing carbon, that absorbs heat in medium temperature flue gas heat-exchange unit, part medium temperature flue gas heat is absorbed using rotary regenerative air preheater, from pressing again
Contracting machine outlet manifold goes out part low temperature supercritical carbon dioxide and absorbs heat in low-temperature flue gas heat exchanger, and this mode can all inhale
The heat for receiving low-temperature flue gas in boiler tail realizes the cascade utilization of energy, improves boiler efficiency.In addition, using three-level backheat
Reheating recompresses supercritical carbon dioxide power cycle configuration, and system circulation efficiency is higher, to improve generating efficiency.
Claims (9)
1. a kind of supercritical carbon dioxide circulating flue gas waste heat recycles coal generating system, it is characterised in that: including being sequentially connected
Logical forecooler (17), main compressor (1), cryogenic regenerator (2), medium temperature regenerator (3), high temperature regenerator (4), economizer
(9), overheat air cooling wall (10), high pressure turbine (8), middle pressure reheater (11), intermediate pressure turbine (7), low pressure reheater (12) and low
It presses turbine (6)；It further include recompression machine (5), rotary regenerative air preheater (16), high-temperature flue gas heat exchanger (13), medium temperature flue gas
Heat exchanger (14) and low-temperature flue gas heat exchanger (15)；Main compressor (1) outlet simultaneously with cryogenic regenerator (2) cold side working medium entrances
It is connected with low-temperature flue gas heat exchanger (15) entrance；Cryogenic regenerator (2) cold side sender property outlet simultaneously with low-temperature flue gas heat exchanger
(15) outlet, medium temperature flue gas heat-exchange unit (14) entrance are connected with medium temperature regenerator (3) cold side working medium entrances；High temperature regenerator
(4) cold side working medium entrances are exported with medium temperature regenerator (3) cold side sender property outlet, medium temperature flue gas heat-exchange unit (14) simultaneously, are recompressed
Machine (5) outlet is connected with high-temperature flue gas heat exchanger (13) entrance, high temperature regenerator (4) cold side sender property outlet at the same with high temperature cigarette
Gas heat exchanger (13) entrance is connected with economizer (9) entrance；Cryogenic regenerator (2) hot side sender property outlet simultaneously with recompression machine
(5) entrance is connected with forecooler (17) working medium entrances；Low pressure turbine (6) is vented successively in high temperature regenerator (4), medium temperature backheat
Heat release in device (3) and cryogenic regenerator (2), main compressor (1) low exit temperature working medium are successively returned in cryogenic regenerator (2), medium temperature
Heat absorption in hot device (3) and high temperature regenerator (4)；Main compressor (1) outlet manifold cryogenic fluid passes through low-temperature flue gas heat exchanger
(15) medium temperature regenerator (3) entrance is returned after absorbing heat；Cryogenic regenerator (2) outlet manifold cryogenic fluid passes through medium temperature flue gas heat exchange
High temperature regenerator (4) entrance is returned after device (14) heat absorption；High temperature regenerator (4) inlet distribution part medium temperature working medium passes through high temperature cigarette
Economizer (9) entrance is returned after gas heat exchanger (13) heat absorption；Cold air enters after heat absorption in rotary regenerative air preheater (16)
Boiler.
2. a kind of supercritical carbon dioxide circulating flue gas waste heat according to claim 1 recycles coal generating system, special
Sign is: overheat air cooling wall (10), middle pressure reheater (11) are arranged in burner hearth, and low pressure reheater (12) is arranged in horizontal cigarette
Road, economizer (9) and high-temperature flue gas heat exchanger (13) are arranged in vertical well gas flue, rotary regenerative air preheater (16) and medium temperature flue gas
Heat exchanger (14) is respectively arranged in portion flow flue two sides, and low-temperature flue gas heat exchanger (15) is arranged in back-end ductwork, whole
Constitute the Π type boiler for having back-end ductwork part flow arrangement.
3. a kind of supercritical carbon dioxide circulating flue gas waste heat according to claim 2 recycles coal generating system, special
Sign is: overheat air cooling wall (10) and middle pressure reheater (11) are arranged in inside boiler furnace, shared radiation of burner hearth
Thermic load.
4. a kind of supercritical carbon dioxide circulating flue gas waste heat according to claim 1 recycles coal generating system, special
Sign is: high temperature regenerator (4) the cold side working medium entrances shunt part medium temperature working medium and enter high-temperature flue gas heat exchanger (13) suction
After heat, continue to absorb heat into economizer (9).
5. a kind of supercritical carbon dioxide circulating flue gas waste heat according to claim 1 recycles coal generating system, special
Sign is: the entrance flue gas temperature of the low pressure reheater (12) is 630 DEG C.
6. a kind of supercritical carbon dioxide circulating flue gas waste heat according to claim 1 recycles coal generating system, special
Sign is: cryogenic regenerator (2) the cold side sender property outlet shunts part cryogenic fluid and changes in portion flow flue medium temperature flue gas
Hot device (14) absorbs flue gas heat, returns to high temperature regenerator (4) cold side working medium entrances, for reducing exhaust gas temperature, reduces boiler
Flue gas loss.
7. a kind of supercritical carbon dioxide circulating flue gas waste heat according to claim 1 recycles coal generating system, special
Sign is: main compressor (1) the outlet manifold cryogenic fluid absorbs flue gas heat in back-end ductwork low-temperature flue gas heat exchanger (15)
Amount returns to medium temperature regenerator (3) cold side working medium entrances, for further decreasing exhaust gas temperature, reduces boiler exhaust gas loss.
8. a kind of supercritical carbon dioxide circulating flue gas waste heat according to claim 1 recycles coal generating system, special
Sign is: the working medium that the system uses is supercritical carbon dioxide.
9. a kind of described in any item supercritical carbon dioxide circulating flue gas waste heat recycling coal generating systems of claim 1 to 8
Operation method, it is characterised in that: working medium is in the main compressor (1) after pressurization, successively in cryogenic regenerator (2), medium temperature backheat
Heat absorption in the economizer (9) of device (3), high temperature regenerator (4) and boiler internal and overheat air cooling wall (10), temperature increase laggard
Enter high pressure turbine (8) demi-inflation acting, temperature and pressure all reduces after acting, and working medium is again introduced into boiler in middle pressure reheater
(11) heat absorption in, temperature enter intermediate pressure turbine (7) demi-inflation after improving again and do work, and temperature and pressure all reduces after acting,
Working medium is again introduced into boiler heat absorption in low pressure reheater (12), and temperature enters low pressure turbine (6) after improving again and expands completely
Acting, low pressure turbine (6) are vented successively in high temperature regenerator (4), medium temperature regenerator (3) and cryogenic regenerator (2) after heat release,
Two strands are split into, is mixed after stock-traders' know-how recompression machine (5) pressurization with high temperature regenerator (4) cold side input port working medium, another stock is successively
It in forecooler (17) after cooling, is again introduced into main compressor (1), completes closed circulation；Main compressor (1) outlet manifold working medium
Cryogenic regenerator (2) cold side sender property outlet is returned after low-temperature flue gas heat exchanger (15) heat absorption；Cryogenic regenerator (2) cold side working medium
Outlet manifold working medium returns to high temperature regenerator (4) cold side working medium entrances after medium temperature flue gas heat-exchange unit (14) absorb heat；Cold air exists
Enter boiler furnace auxiliary combustion in rotary regenerative air preheater (16) after heat absorption.
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| CN110273724A (en) * | 2019-08-05 | 2019-09-24 | 上海发电设备成套设计研究院有限责任公司 | A kind of double-work medium coal generating system and method |
| CN110847984A (en) * | 2019-11-15 | 2020-02-28 | 西安交通大学 | Supercritical carbon dioxide circulating coal-fired power generation system integrated with low-temperature waste heat recovery and operation method |
| CN111188657A (en) * | 2020-03-11 | 2020-05-22 | 西安热工研究院有限公司 | Coal-based supercritical carbon dioxide power generation waste heat recovery system and operation method |
| CN111237734A (en) * | 2020-03-11 | 2020-06-05 | 西安热工研究院有限公司 | Three-stage regenerative intermediate reheating supercritical carbon dioxide coal-fired power generation system and operation method |
| CN112554981A (en) * | 2020-11-25 | 2021-03-26 | 西安交通大学 | Power system for industrial steam supercritical carbon dioxide and operation method |
| CN114575937A (en) * | 2022-01-26 | 2022-06-03 | 国家能源集团新能源技术研究院有限公司 | Supercritical carbon dioxide circulation power generation system |
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