CN215486282U - IGCC system adapting to rapid peak regulation - Google Patents
IGCC system adapting to rapid peak regulation Download PDFInfo
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- CN215486282U CN215486282U CN202122083850.0U CN202122083850U CN215486282U CN 215486282 U CN215486282 U CN 215486282U CN 202122083850 U CN202122083850 U CN 202122083850U CN 215486282 U CN215486282 U CN 215486282U
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- 230000015572 biosynthetic process Effects 0.000 claims abstract description 20
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 20
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 45
- 239000003245 coal Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000002918 waste heat Substances 0.000 claims description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 238000000746 purification Methods 0.000 claims description 18
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 15
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- 238000001179 sorption measurement Methods 0.000 claims description 14
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- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
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Abstract
The utility model relates to the technical field of integrated gasification combined cycle systems, and discloses an Integrated Gasification Combined Cycle (IGCC) system adaptive to rapid peak regulation, wherein a compressed air storage tank is additionally arranged in an integrated air separation device, and a pressure detector is arranged on the compressed air storage tank; a heat exchanger is additionally arranged in the gas turbine system, and the tail part of the compressor is connected with a compressed air storage tank through the heat exchanger; the pressure detector is connected with a control unit, the control unit is connected with the air compressor and the air compressor, and the air suction quantity at the tail part of the air compressor or the working load of the air compressor is adjusted according to the pressure detected by the pressure detector. A heat exchanger is additionally arranged between the air compressor and the air compressor to heat the synthesis gas, so that the difference between the air extracted by the air compressor and the air compressed by the air compressor is reduced, and the integral power generation efficiency of the IGCC is improved; a compressed air storage tank is additionally arranged between the air compressor and the air compressor, and the frequent fluctuation of the air extraction pressure and the flow caused by the frequent change of the load of the gas turbine due to peak shaving is smoothed, so that the stable operation of the integrated air separation device is ensured.
Description
Technical Field
The utility model relates to the technical field of integrated gasification combined cycle systems, in particular to an Integrated Gasification Combined Cycle (IGCC) system adaptive to rapid peak regulation.
Background
Integrated Gasification Combined Cycle (IGCC) refers to an advanced power system that combines coal gasification technology with an efficient combined cycle. The IGCC main system flow is that coal reacts with a gasifying agent in a gasification furnace to form synthesis gas with medium and low heat values, the synthesis gas becomes clean gas fuel through a purification process, then the clean gas fuel is sent to a gas turbine to combust and heat a gas working medium to drive the gas turbine to do work and generate power, and the exhaust gas of the gas turbine enters a waste heat boiler to heat water to generate superheated steam to drive a steam turbine to do work and generate power. The IGCC has the advantages of high power generation efficiency, low pollutant emission, low carbon dioxide capture cost before combustion and the like. The IGCC main equipment comprises an air separation device, a gasification furnace, synthetic gas purification equipment, a gas turbine, a waste heat boiler, a steam turbine and the like. The oxygen generation power consumption of the air separation system accounts for 10-20% of the total power generation of the IGCC system, and accounts for 70-85% of the total power consumption of the plant, and the air separation system is one of the key factors for restricting the improvement of the power generation efficiency of the IGCC. Because the efficiency of the gas compressor of the gas turbine is higher than that of the air compressor in the air separation device, and the air inflow of the gas turbine is far larger than that of the air separation device, air can be extracted from the tail of the gas compressor of the gas turbine and enters the air separation system, the energy consumption of the air compressor of the air separation device is reduced, and the power generation efficiency of the IGCC is improved. Generally speaking, the integration rate (the proportion of compressed air extracted from the tail part of a gas turbine compressor to the total air input of an air separation unit) is between 50% and 80%, and the power generation efficiency of the IGCC whole plant is the highest. At present, a power system mainly using renewable energy is constructed, and a gas turbine unit is required to more frequently undertake peak-load and frequency modulation tasks. Because the pressure ratio and the air input of the air compressor are different along with the different loads of the gas turbine, the flow rate, the temperature and the pressure of compressed air extracted from the tail part of the air compressor also change correspondingly, and the flow rate, the temperature and the pressure of raw material air entering an inlet of the integrated air separation unit frequently fluctuate due to the fact that the compressed air accounts for 50% -80% of the total air input of the integrated air separation unit, and the stable operation of the air separation unit is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an IGCC system adaptive to rapid peak regulation, and solves the problems that the flow, the temperature and the pressure of raw material gas at the inlet of an integrated air separation unit frequently fluctuate and the air separation unit is not favorable for stable operation.
The utility model is realized by the following technical scheme:
an IGCC system adapting to rapid peak regulation comprises an integrated air separation unit, a coal gasification and purification system, a gas turbine system, a waste heat boiler and a steam turbine system which are connected in sequence;
the integrated air separation device comprises an air compressor, wherein a compressed air storage tank is additionally arranged in the integrated air separation device, and a pressure detector is arranged on the compressed air storage tank;
the gas turbine system comprises a gas compressor, a heat exchanger is additionally arranged in the gas turbine system, and the tail part of the gas compressor is connected with a compressed air storage tank through the heat exchanger;
the pressure detection meter is connected with a control unit, and the control unit is connected with the air compressor and used for adjusting the air suction quantity at the tail part of the air compressor or adjusting the working load of the air compressor according to the pressure detected by the pressure detection meter.
Further, the air extraction quantity at the tail part of the air compressor accounts for no more than 15% of the air flow at the inlet of the air compressor.
Further, the integrated air separation device also comprises an air cooling tower, an air adsorption tower, an expansion machine, a rectifying tower, a liquid nitrogen storage tank and a liquid oxygen storage tank;
the air compressor, the compressed air storage tank, the air cooling tower, the air adsorption tower, the expansion machine and the rectifying tower are sequentially connected through pipelines, and the rectifying tower is respectively connected with the liquid nitrogen storage tank and the liquid oxygen storage tank.
Further, a pressure reducing device is arranged on the air compressor.
Furthermore, the air adsorption towers are provided with two adsorbents which are respectively provided with water vapor, carbon dioxide and hydrocarbon for alternate use, and when one of the adsorbents is used for adsorbing the water vapor, the carbon dioxide and the hydrocarbon, the other adsorbent is regenerated by a heating nitrogen back blowing mode.
Furthermore, the coal gasification and purification system comprises a coal grinding and powder conveying system, a gasification furnace and a synthesis gas purification system which are sequentially connected, a liquid nitrogen storage tank is connected with the coal grinding and powder conveying system, a liquid oxygen storage tank is connected with the gasification furnace, and the synthesis gas purification system is connected with a heat exchanger.
Further, the gas turbine system also comprises a combustion chamber, a turbine and a first generator, wherein the outlet of the combustion chamber is connected with the turbine, the turbine is connected with the gas compressor and the first generator through a connecting shaft, and the heat exchanger is connected with the combustion chamber through a heater.
Further, the waste heat boiler and the steam turbine system comprise a waste heat boiler, a steam turbine, a second generator, a condenser and a water feeding pump, wherein an exhaust port of the turbine is connected with an air inlet of the waste heat boiler, a steam outlet of the waste heat boiler is connected with the steam turbine, the steam turbine is connected with the second generator, a steam exhaust outlet of the steam turbine is connected with the water feeding pump through the condenser, and the water feeding pump is connected with a water inlet of the waste heat boiler.
Further, the pressure of the compressed air storage tank is maintained at 0.6MPa or more.
Compared with the prior art, the utility model has the following beneficial technical effects:
the utility model discloses an IGCC (integrated gasification combined cycle) system adaptive to rapid peak regulation, which comprises an integrated air separation unit, a coal gasification and purification system, a gas turbine system, a waste heat boiler and a steam turbine system. The utility model is characterized in that the tail air exhaust of the gas turbine compressor is used as a partial raw material source of the integrated air separation unit, so that the air compressor of the conventional air separation unit is changed into the air compressor with smaller load, the total load of the air compressor can be reduced by about 13-30%, the energy consumption of the air compressor can be reduced, and the integral power generation efficiency of the IGCC is further improved; meanwhile, the heat exchanger is additionally arranged between the integrated air separation unit and the gas turbine compressor to heat the synthesis gas, so that the difference between the air exhaust of the gas turbine compressor and the air compression temperature of the integrated air separation unit compressor can be reduced, and the integrated power generation efficiency of the IGCC is improved; by additionally arranging the compressed air storage tank between the integrated air separation unit and the gas compressor of the gas turbine, the frequent fluctuation of the air extraction pressure and the flow caused by the frequent change of the load of the gas turbine due to peak shaving can be smoothed, so that the stable operation of the integrated air separation unit is ensured.
Further, the gas compressor of the gas turbine also has the main function of providing compressed air for the combustion chamber, and too much air is extracted, so that the subsequent combustion process is influenced, the flow of the exhaust gas of the gas turbine at the back entering the waste heat boiler is influenced, the steam yield of the waste heat boiler is reduced too much, and the subsequent output of the steam turbine is influenced. In order to reduce the influence of the air extraction of the air compressor on the stable operation of the gas turbine, the proportion of the air extraction of the air compressor to the air flow at the inlet of the air compressor is controlled to be not more than 15%.
Drawings
FIG. 1 is a schematic view of an integrated coal gasification combined cycle system employing an integrated air separation unit;
FIG. 2 is a schematic diagram of compressed air storage tank pressure control logic;
FIG. 3 is a graph of air compressor load versus gas turbine load.
Wherein 11 is an air compressor; 12 is a compressed air storage tank; 13 is a pressure reducing device; 14 is an air cooling tower; 15 is an air adsorption tower; 16 is an expander; 17 is a rectifying tower; 18 is a liquid nitrogen storage tank; 19 is a liquid oxygen storage tank; 21 is a coal grinding and powder conveying system; 22 is a gasification furnace; 23 is a synthesis gas purification system; 31 is a compressor; 32 is a combustion chamber; 33 is a turbine; 34 is a first generator; 35 is a connecting shaft; 41 is a waste heat boiler; 51 is a steam turbine; 52 is a second generator; 53 is a coupling; 54 is a condenser; 55 is a water supply pump; 61 is a heat exchanger; 62 is a heater;
101 is air; 102, air is extracted from the tail part of the compressor; 103, exhausting gas by a gas compressor; 104 is cooled compressed air; 105, exhausting air by an air compressor; 106 is decompressed compressed air; 107, exhausting at high temperature and high pressure; 108 turbine exhaust; exhaust gas of the waste heat boiler is 109; 111 is high pressure nitrogen; 112 is high pressure oxygen; 201 is coal; 202 is pulverized coal transported by high-pressure nitrogen; 203 is slag; 211 is raw synthesis gas; 212 is the purified syngas; 213 is preheated synthesis gas; 301 is water supply; 302 is superheated steam; 303 is dead steam; 304 is condensed water; 305 is low pressure steam.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the utility model.
As shown in FIG. 1, the utility model discloses an IGCC system suitable for fast peak shaving, which comprises an integrated air separation unit, a coal gasification and purification system, a gas turbine system, a waste heat boiler and a steam turbine system which are connected in sequence.
The integrated air separation device comprises an air compressor 11, a compressed air storage tank 12, a pressure reducing device 13, an air cooling tower 14, an air adsorption tower 15, an expansion machine 16 and a rectifying tower 17 which are connected in sequence, wherein the rectifying tower 17 is respectively connected with a liquid nitrogen storage tank 18 and a liquid oxygen storage tank 19. A compressed air storage tank 12 is additionally arranged in the integrated air separation plant, and a pressure detector is arranged on the compressed air storage tank 12.
The gas turbine system comprises a heat exchanger 61, a heater 62, a compressor 31, a combustion chamber 32, a turbine 33 and a first generator 34 which are connected in sequence, wherein the turbine 33 is connected with the compressor 31 and the first generator 34 through a connecting shaft 35. A heat exchanger 61 is additionally arranged in the gas turbine system, and the tail part of the compressor 31 is connected with a compressed air storage tank 12 through the heat exchanger 61.
The integrated air separation plant has the following working flow, the air 101 is compressed by the air compressor 11 into compressed air with the pressure not higher than 1.1MPa and the temperature not higher than 120 ℃, the compressed air, namely the air compressor exhaust 105 enters the compressed air storage tank 12 for storage, meanwhile, the air compressor tail part exhaust 102 is cooled by the heat exchanger 61 to become cooled compressed air 104, the cooled compressed air 104 enters the compressed air storage tank 12 for storage, the design pressure of the compressed air storage tank 12 is not lower than 0.6MPa, if the pressure is lower than the pressure, the load of the air compressor 11 is increased, and the flow of the air compressor exhaust 105 is increased to meet the design pressure requirement of the compressed air storage tank 12.
The outlet of the compressed air storage tank 12 is connected with a pressure reducing device 13, the pressure of the compressed air is reduced to be not higher than 0.6MPa, the output is carried out, and the temperature is not higher than 100 ℃. The decompressed compressed air 106 enters an air cooling tower 14 to be cooled to 10 ℃, then enters an air adsorption tower 15 to remove water vapor, carbon dioxide and hydrocarbon, and CO is adsorbed2，H2The O content is not more than 1ppm, and the acetylene content is not more than 0.1 ppm.
The air adsorption tower 15 is composed of two identical adsorption towers, wherein when one adsorption tower utilizes the adsorbent to adsorb water vapor, carbon oxide and hydrocarbon, the other adsorption tower regenerates the adsorbent by heating nitrogen back flushing, and the two adsorption towers are alternately used to meet the continuous and stable operation requirement of the integrated air separation device.
The compressed air without water vapor, carbon dioxide and hydrocarbon enters an expansion machine 16 for adiabatic isentropic expansion to do work externally, the internal energy of the air is consumed for cooling, and the temperature is-172 ℃ after cooling. The cooled compressed air enters a rectifying tower 17 to be rectified and then separated into liquid nitrogen and liquid oxygen, and the liquid nitrogen and the liquid oxygen are respectively stored in a liquid nitrogen storage tank 18 and a liquid oxygen storage tank 19. Finally, the high-pressure nitrogen 111 and the high-pressure oxygen 112 are respectively gasified and pressurized from the liquid nitrogen storage tank 18 and the liquid oxygen storage tank 19 by the liquid nitrogen and the liquid oxygen, and enter other systems of the IGCC for use. The specific process of the integrated air separation device requires outlet nitrogen, the purity of oxygen is not lower than 99 percent, and the pressure is not lower than 4.5 MPa.
Because the entrained-flow bed gasification furnace 22 has the advantages of large single-furnace capacity, high availability ratio, strong variable load capacity, high cold coal gas efficiency and high carbon conversion rate, liquid slag discharge is adopted, environmental protection, comprehensive utilization of resources and the like are facilitated, and the entrained-flow bed gasification process is preferred by the coal gasification process. As shown in fig. 1, the coal gasification and purification system includes a coal grinding and powder conveying system 21, a gasification furnace 22, and a synthesis gas purification system 23, which are connected in sequence, a liquid nitrogen storage tank 18 is connected to the coal grinding and powder conveying system 21, a liquid oxygen storage tank 19 is connected to the gasification furnace 22, and the synthesis gas purification system 23 is connected to a heat exchanger 61.
The coal gasification and purification system operates as follows, coal 201 enters the coal grinding and powder conveying system 21 to be ground to fineness R90 less than 0.2, and is conveyed into the gasification furnace 22 by high-pressure nitrogen 111 from an integrated air separation plant. In the gasification furnace 22, the pulverized coal 202 transported by the high-pressure nitrogen gas and the high-pressure oxygen 112 from the integrated air separation unit are subjected to gasification reaction to generate CO and H2High-temperature raw synthesis gas 211 as a main component, and also produces H2S、NH3And the like. The liquid slag 203 generated after the gasification of the pulverized coal 202 is discharged from the slag discharge system at the lower part of the gasification furnace 22. The high-temperature raw synthesis gas 211 generated by the gasification furnace 22 is subjected to fly ash and H removal by the synthesis gas purification system 232S，NH3Etc., at which point the syngas temperature drops to about 130 deg.c. The purified syngas 212 is heated by the high temperature and high pressure air 102 extracted from the tail of the gas turbine compressor 31 via the heat exchanger 61. Because the flow, temperature and pressure of the tail bleed air 102 of the compressor of the gas turbine are greatly influenced by the load variation of the gas turbine, the temperature of the synthesis gas at the outlet of the heat exchanger 61 is difficult to keep in a narrow range, and meanwhile, in order to further increase the temperature of the synthesis gas entering the combustion chamber 32 to increase the initial temperature of the gas entering the turbine 33 of the gas turbine to improve the efficiency of the gas turbine, the purified synthesis gas 212 is still required to be further increased to about 215 ℃ by the heater 62 after being heated by the heat exchanger 61. The heat of the syngas heated in the heater 62 is derived from a portion of the low pressure steam 305 of the heat recovery boiler 41. The preheated syngas 213 eventually enters the combustor 32.
As shown in FIG. 1, the gas turbine system is operated such that filtered air 101 is compressed by entering a compressor 31, the compressor 31 preferably having a pressure ratio of 12, and the number of compressor 31 stages may be between 15 and 17, preferably 17.
As can be seen from table 1, in order to ensure that the pressure of the compressor tail bleed air 102 is not lower than 0.6MPa under any load, the bleed position is preferably selected to be at the last stage or the penultimate stage of the compressor 31, at this time, the temperature of the compressor tail bleed air 102 is far higher than the temperature of 100 ℃ of the inlet compressed air required by the air cooling tower 14 of the integrated air separation plant, and the compressor tail bleed air 102 can be cooled by the heat exchanger 61 and then enters the compressed air storage tank 12. In the heat exchanger 61, the compressor tail bleed air 102 is used to heat the cleaned syngas 212, and the heat exchanged is recovered from the cleaned syngas 212 and carried to the combustor 32 until the turbine 33 performs work and outputs, thereby improving the efficiency of the gas turbine. In the combustion chamber 32, the preheated synthesis gas 213 is mixed and combusted with compressor exhaust gas 103 from the compressor 31 to generate high-temperature and high-pressure exhaust gas 107, blades of the turbine 33 are pushed to rotate, mechanical work is output through the connecting shaft 35, the mechanical work output by the connecting shaft 35 is converted into electric energy by the first generator 34, and the turbine exhaust gas 108 enters the waste heat boiler 41.
TABLE 1
| Load(s) | Pressure ratio | Outlet temperature (. degree.C.) |
| 30％ | 6.1 | 301 |
| 50％ | 6.8 | 317 |
| 75％ | 8.6 | 327 |
| 100％ | 11.6 | 331 |
As shown in fig. 1, the system of the waste heat boiler 41 and the steam turbine 51 includes the waste heat boiler 41, the steam turbine 51, the second generator 52, the condenser 54, and the feed water pump 55, an exhaust port of the turbine 33 is connected to an intake port of the waste heat boiler 41, a steam outlet of the waste heat boiler 41 is connected to the steam turbine 51, the steam turbine 51 is connected to the second generator 52, a steam exhaust outlet of the steam turbine 51 is connected to the feed water pump 55 through a condenser, and the feed water pump 55 is connected to an intake port of the waste heat boiler 41.
The working process of the waste heat boiler and the steam turbine system is as follows:
the heat recovery steam generator 41 heats the feed water 301 with the gas turbine exhaust 108 to generate superheated steam 302, and the heat-exchanged heat recovery steam generator exhaust 109 enters the atmosphere. The turbine 51 drives the blades to rotate by using the superheated steam 302, and drives the rotor of the second generator 52 to rotate through the coupling 53, so that the thermal energy of the superheated steam 302 is firstly converted into rotational mechanical energy, and finally converted into electric energy through electromagnetic induction for output. The exhaust steam 303, which has released the heat energy, is discharged from the turbine 51, condensed in the condenser 54 to form condensed water 304, and pressurized and fed by the feed water pump 55 to the waste heat boiler 41 to complete the steam cycle.
As shown in fig. 2, the air cooling tower 14 requires that the pressure of the inlet feed gas is not lower than 0.6MPa, so that the pressure of the compressed air storage tank 12 needs to be kept stable and higher than 0.6MPa, when the pressure of the compressed air storage tank 12 is judged to be lower than 0.625MPa, an attempt is made to increase the air extraction amount at the tail of the compressor of the gas turbine, and if not, the load of the compressor 11 is increased to keep the pressure of the compressed air storage tank 12 stable. The load curve of the air compressor 11 can be adjusted with the gas turbine load as shown in fig. 3 to maintain the compressed air storage tank 12 pressure at not less than 0.6 MPa.
Although the IGCC is used for fast peak shaving, the load is frequently fluctuated, which causes the flow rate, the temperature and the pressure of the raw material gas at the inlet of the traditional (non-compressed air storage tank 12) integrated air separation unit to be frequently fluctuated, the flow rate, the temperature and the pressure of the raw material gas at the inlet of the integrated air separation unit can be kept basically stable after the compressed air storage tank 12 is adopted.
When the load of the gas turbine is rapidly increased or decreased, that is, the load change rate of the gas turbine is greater than 3% of the rated load/min, because the whole integrated air separation device has a large amount of gas retention, the load adjustment has certain hysteresis, and a certain amount of advance or hysteresis needs to be reserved when the load adjustment of the air compressor 11 is adjusted as shown in fig. 3.
As can be seen from fig. 3, the air compressor 11 load and the gas turbine load are not 1: the relationship 1, for example, 60% of the compressor 31 and 40% of the compressor 11, i.e., the gas turbine load adjustment is not proportional to the compressor 11 load adjustment, can be over-adjusted, i.e., advanced or retarded, to ensure rapid adjustment.
Claims (9)
1. An IGCC system adapting to rapid peak regulation is characterized by comprising an integrated air separation unit, a coal gasification and purification system, a gas turbine system, a waste heat boiler and a steam turbine system which are sequentially connected;
the integrated air separation device comprises an air compressor (11), a compressed air storage tank (12) is additionally arranged in the integrated air separation device, and a pressure detector is arranged on the compressed air storage tank (12);
the gas turbine system comprises a gas compressor (31), a heat exchanger (61) is additionally arranged in the gas turbine system, and the tail part of the gas compressor (31) is connected with a compressed air storage tank (12) through the heat exchanger (61);
the pressure detection meter is connected with a control unit, the control unit is connected with the air compressor (31) and the air compressor (11) and is used for adjusting the air extraction amount at the tail part of the air compressor or adjusting the working load of the air compressor (11) according to the pressure detected by the pressure detection meter.
2. An IGCC system adapted for fast peak shaver as claimed in claim 1, characterized in that the compressor tail bleed air amount does not exceed 15% of the compressor (31) inlet air flow rate.
3. An IGCC system adapted for fast peak shaving according to claim 1, characterized in that the integrated air separation plant further comprises an air cooling tower (14), an air adsorption tower (15), an expander (16), a rectification tower (17), a liquid nitrogen storage tank (18) and a liquid oxygen storage tank (19);
an air compressor (11), a compressed air storage tank (12), an air cooling tower (14), an air adsorption tower (15), an expansion machine (16) and a rectifying tower (17) are sequentially connected through pipelines, and the rectifying tower (17) is respectively connected with a liquid nitrogen storage tank (18) and a liquid oxygen storage tank (19).
4. An IGCC system adapting to fast peak shaver according to claim 3, characterized in that a pressure reducing device (13) is arranged on the air compressor (11).
5. An IGCC system adapting to fast peak regulation according to claim 3, characterized in that two air adsorption towers (15) are provided, each equipped with an adsorbent for adsorbing water vapor, carbon dioxide and hydrocarbons, and used alternately, wherein when one is used for adsorbing water vapor, carbon dioxide and hydrocarbons, the other one regenerates the adsorbent by heating nitrogen back blowing.
6. An IGCC system adapting to fast peak regulation according to claim 3, wherein the coal gasification and purification system comprises a coal grinding and powder conveying system (21), a gasification furnace (22) and a synthesis gas purification system (23) which are connected in sequence, a liquid nitrogen storage tank (18) is connected with the coal grinding and powder conveying system (21), a liquid oxygen storage tank (19) is connected with the gasification furnace (22), and the synthesis gas purification system (23) is connected with the heat exchanger (61).
7. An IGCC system adapted for fast peak shaving according to claim 1, characterized in that the gas turbine system further comprises a combustion chamber (32), a turbine (33) and a first generator (34), the outlet of the combustion chamber (32) is connected with the turbine (33), the turbine (33) is connected with the compressor (31) and the first generator (34) through a connecting shaft (35), and the heat exchanger (61) is connected with the combustion chamber (32) through a heater (62).
8. An IGCC system adapting to fast peak shaving according to claim 1, characterized in that the exhaust heat boiler and the steam turbine system comprise an exhaust heat boiler (41), a steam turbine (51), a second generator (52), a condenser (54) and a feed water pump (55), the exhaust port of the turbine (33) is connected with the air inlet of the exhaust heat boiler (41), the steam outlet of the exhaust heat boiler (41) is connected with the steam turbine (51), the steam turbine (51) is connected with the second generator (52), the exhaust steam outlet of the steam turbine (51) is connected with the feed water pump (55) through the condenser, and the feed water pump (55) is connected with the water inlet of the exhaust heat boiler (41).
9. An IGCC system adapted for fast peak shaver as set forth in claim 1, characterized in that the pressure of the compressed air storage tank (12) is maintained above 0.6 MPa.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586257A (en) * | 2021-08-31 | 2021-11-02 | 中国华能集团清洁能源技术研究院有限公司 | IGCC system adapting to rapid peak regulation and pressure regulation method |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586257A (en) * | 2021-08-31 | 2021-11-02 | 中国华能集团清洁能源技术研究院有限公司 | IGCC system adapting to rapid peak regulation and pressure regulation method |
| CN113586257B (en) * | 2021-08-31 | 2024-02-02 | 中国华能集团清洁能源技术研究院有限公司 | IGCC system adapting to rapid peak regulation and pressure regulation method |
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