CN215860491U - Integrated Integrated Gasification Combined Cycle (IGCC) system for generating oxygen by integrating high-temperature ion transport membrane - Google Patents
Integrated Integrated Gasification Combined Cycle (IGCC) system for generating oxygen by integrating high-temperature ion transport membrane Download PDFInfo
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- CN215860491U CN215860491U CN202122237822.XU CN202122237822U CN215860491U CN 215860491 U CN215860491 U CN 215860491U CN 202122237822 U CN202122237822 U CN 202122237822U CN 215860491 U CN215860491 U CN 215860491U
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Abstract
The utility model discloses an Integrated Gasification Combined Cycle (IGCC) system for oxygen generation by a high-temperature ion transport membrane, which comprises a gasification furnace, a combustion chamber and a turbine which are sequentially connected; the inlet of the gasification furnace is connected with water and coal, the combustion chamber and the turbine inlet are connected with the output end of the gas compressor, the output end of the gas compressor is connected with the permeation side inlet of the high-temperature ion transport membrane oxygen generation unit, the permeation side outlet of the high-temperature ion transport membrane oxygen generation unit is connected with the inlet of the combustion chamber, and the non-permeation side outlet of the high-temperature ion transport membrane oxygen generation unit is connected with the inlet of the gasification furnace. The cost and the energy consumption are reduced, an air compressor and an air heater which are needed by the high-temperature ion transport membrane oxygen production are omitted, the system flow is simplified, and the equipment investment is reduced.
Description
Technical Field
The utility model belongs to the field of coal gasification combined cycle systems, and relates to an Integrated Gasification Combined Cycle (IGCC) system for oxygen generation by integrating a high-temperature ion transport membrane.
Background
The high-temperature ion transport membrane technology is a novel air separation technology developed in nearly 20 years, and is rapidly developed due to the advantages of low investment, low energy consumption, high oxygen production purity (nearly 100 percent) and the like. The core of the high-temperature ion transport membrane technology is a non-porous mixed conduction oxygen permeable membrane which can operate at a higher temperature and a higher pressure, and when an oxygen partial pressure difference exists on two sides of the membrane, oxygen permeates from a high oxygen partial pressure side to a low oxygen partial pressure side in the form of oxygen ions, so that the separation of oxygen and nitrogen in air is realized.
However, the high-temperature ion transport membrane technology has good air separation efficiency only by operating at high temperature and high pressure. The conventional high-temperature ion transport membrane technology process needs to be independently provided with air compression and air heating links, the system is complex, and the energy consumption is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide the IGCC system integrating the high-temperature ion transport membrane oxygen generation, so that the cost and the energy consumption are reduced, an air compressor and an air heater which are required by the high-temperature ion transport membrane oxygen generation are omitted, the system flow is simplified, and the equipment investment is reduced.
In order to achieve the purpose, the utility model adopts the following technical scheme to realize the purpose:
an Integrated Gasification Combined Cycle (IGCC) system for oxygen generation by a high-temperature ion transport membrane comprises a gasification furnace, a combustion chamber and a turbine which are sequentially connected;
the combustion chamber and the turbine inlet are connected with the output end of a gas compressor, the output end of the gas compressor is connected with the permeation side inlet of a high-temperature ion transport membrane oxygen generation unit, the permeation side outlet of the high-temperature ion transport membrane oxygen generation unit is connected with the combustion chamber inlet, and the non-permeation side outlet of the high-temperature ion transport membrane oxygen generation unit is connected with the gasification furnace inlet.
Preferably, the temperature within the high temperature ion transport membrane oxygen generation unit is greater than 400 ℃.
Preferably, the working pressure of the high-temperature ion transport membrane oxygen generation unit is 15-20 bar.
Preferably, a gas cooler, a dust removal unit, a desulfurization unit and a synthesis gas control unit are sequentially connected between the gasification furnace and the combustion chamber, the inlet of the gas cooler is connected with the outlet of the gasification furnace, and the outlet of the synthesis gas control unit is connected with the inlet of the combustion chamber.
Further, a low-temperature waste heat recovery unit is arranged between the dust removal unit and the desulfurization unit.
Furthermore, the outlet of the gas cooler is connected with the inlet of a waste heat boiler, and the outlet of the waste heat boiler is connected with the inlet of a steam turbine.
Further, the desulfurization unit is connected with a sulfur recovery unit.
Further, the outlet of the dust removal unit is connected with the inlet of the gasification furnace.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model uses the high-temperature ion transport membrane oxygen generation unit to replace a cryogenic air separation system, has lower oxygen generation cost and energy consumption than the cryogenic air separation, can improve the net power generation efficiency of the whole IGCC system, uses the air extracted by the air compressor as the raw material gas of the high-temperature ion transport membrane oxygen generation unit, and has the advantages that: the high-temperature ion transport membrane technology has the characteristic of low energy consumption for oxygen production, and air is extracted by using the air compressor with higher temperature and pressure, so that an air compressor and an air heater device are omitted, the system flow is simplified, and the equipment investment is reduced. The compression efficiency of the air compressor is far higher than that of an air compressor, and the air compressor is used for extracting air to serve as an oxygen generation raw material, so that the energy consumption of air compression can be reduced. In addition, part of air is extracted from the air compressor for oxygen production, so that the problem of through flow after low-calorific-value fuel is used can be relieved; the residual nitrogen-rich air with higher heat energy at the permeation side is injected into the combustion chamber to be mixed with high-temperature fuel gas, so that the utilization efficiency of heat energy is improved on one hand, the oxygen concentration in the combustion chamber is diluted on the other hand, the absolute flame temperature in the combustion chamber is reduced, and the NOx emission is reduced.
Furthermore, steam generated by the gas cooler is sent to the waste heat boiler to be overheated continuously and then sent to the steam turbine to generate electricity, so that the generating efficiency of the system is improved.
Furthermore, the sulfur recovery unit can generate sulfur from the acid gas generated by the desulfurization unit, so that the sulfur is prevented from being discharged into the atmosphere to pollute the environment.
Furthermore, the output end of the dust removal unit is connected with the gasification furnace, so that the fly ash generated by the dust removal unit can be recycled into the gasification furnace, and the environment pollution caused by the fly ash discharged into the atmosphere is avoided.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Wherein: 1-gasification furnace; 2-gas cooler; 3-a dust removal unit; 4-a low temperature waste heat recovery unit; 5-a desulfurization unit; 6-a sulfur recovery unit; 7-synthetic gas modulation unit; 8-a combustion chamber; 9-a gas compressor; 10-turbine; 11-a waste heat boiler; 12-a steam turbine; 13-high temperature ion transport membrane oxygen generation unit.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the IGCC system for integrated high-temperature ion transport membrane oxygen generation according to the present invention includes a gasification furnace 1, a gas cooler 2, a dust removal unit 3, a low-temperature waste heat recovery unit 4, a desulfurization unit 5, a syngas modulation unit 7, a combustion chamber 8, a turbine 10, a waste heat boiler 11, and a steam turbine 12, which are connected in sequence.
The inlet of the gasification furnace 1 is communicated with steam and coal.
The gas outlet of the gas cooler 2 is connected with the waste heat boiler, and the steam generated by the gas cooler 2 is sent to the waste heat boiler 11 to be overheated continuously and then sent to the steam turbine 12 to generate power, so that the power generation efficiency of the system is improved.
The outlet of the dust removal unit 3 is connected with the inlet of the gasification furnace 1, so that the fly ash generated by the dust removal unit 3 can be recycled to the gasification furnace 1, and the environment pollution caused by the fly ash discharged into the atmosphere is avoided.
The desulfurization unit 5 is connected with a sulfur recovery unit 6, and the sulfur recovery unit 6 can generate sulfur from the acidic gas generated by the desulfurization unit 5, so that the acidic gas is prevented from being discharged into the atmosphere to pollute the environment.
The inlet of the combustion chamber 8 and the inlet of the turbine 10 are connected with the output end of a gas compressor 9, the output end of the gas compressor 9 is connected with the permeation side inlet of a high-temperature ion transport membrane oxygen generation unit 13, the permeation side outlet of the high-temperature ion transport membrane oxygen generation unit 13 is connected with the inlet of the combustion chamber 8, and the non-permeation side outlet of the high-temperature ion transport membrane oxygen generation unit 13 is connected with the inlet of the gasification furnace 1.
The temperature in the high temperature ion transport membrane oxygen generation unit 13 is greater than 400 ℃. The working pressure of the high-temperature ion transport membrane oxygen generation unit 13 is 15-20bar, and the working pressure is preferably 15bar in the embodiment.
The working process of the IGCC system integrating the high-temperature ion transport membrane oxygen generation comprises the following steps:
coal is pretreated to be sent into a gasification furnace 1, a strand of water is used as a raw material of gasification reaction and is sent into the gasification furnace 1, the coal is gasified and reacted with water and pure oxygen generated at a non-permeation side outlet of a high-temperature ion transport membrane oxygen generation unit 13 in the gasification furnace 1 to generate crude synthesis gas, and ash slag generated in the gasification process is discharged from the gasification furnace 1. The raw synthesis gas is cooled in the gas cooler 2, and at the same time, steam is generated and sent to the waste heat boiler 11. The raw synthesis gas is sent to a low-temperature waste heat recovery unit 4 after passing through a dust removal unit 3, and fly ash generated by the dust removal unit 3 is recycled to the gasification furnace 1. The further cooled synthesis gas is sent to a desulfurization unit 5, the acid gas generated by the desulfurization unit 5 is sent to a sulfur recovery unit 6 to generate sulfur, and the clean synthesis gas generated by the desulfurization unit 5 is diluted by a synthesis gas modulation unit 7 and then sent to a combustion chamber 8. The air compressor 9 sucks air from the atmosphere, most of the generated high-pressure air is sent to the combustion chamber 8, part of the high-pressure air is pumped and sent to the permeation side inlet of the high-temperature ion transport membrane oxygen generation unit 13 to generate pure oxygen, and the nitrogen-rich air at the permeation side outlet of the high-temperature ion transport membrane oxygen generation unit 13 is sent back to the combustion chamber 8. After the air, the nitrogen-rich air and the synthesis gas are combusted, high-temperature flue gas is generated and sent to the turbine 10 for power generation. The flue gas with higher temperature at the outlet of the turbine 10 is sent to a waste heat boiler 11, and the steam generated by the waste heat boiler 11 is sent to a turbine 12 for power generation.
The operating temperature range of the high-temperature ion transport membrane oxygen production unit 13 is higher than 400 ℃, the working pressure is 15bar, and part of air extracted from the outlet of the air compressor 9 just meets the parameters. Air extracted from the outlet of the air compressor 9 is sent to the permeation side of the high-temperature ion transport membrane oxygen generation unit 13, and pure oxygen generated at the non-permeation side is directly sent to the gasification furnace 1. The residual nitrogen-rich air at the permeation side still has higher heat energy, and is mixed with high-temperature fuel gas by being injected into the combustion chamber 8, so that the utilization efficiency of the heat energy is improved on one hand, the oxygen concentration in the combustion chamber 8 is diluted on the other hand, the absolute flame temperature in the combustion chamber 8 is reduced, and the NOx emission is reduced.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. An Integrated Gasification Combined Cycle (IGCC) system for oxygen generation by a high-temperature ion transport membrane is characterized by comprising a gasification furnace (1), a combustion chamber (8) and a turbine (10) which are sequentially connected;
the inlet of the combustion chamber (8) and the inlet of the turbine (10) are connected with the output end of a gas compressor (9), the output end of the gas compressor (9) is connected with the inlet of the permeation side of a high-temperature ion transport membrane oxygen generation unit (13), the outlet of the permeation side of the high-temperature ion transport membrane oxygen generation unit (13) is connected with the inlet of the combustion chamber (8), and the outlet of the non-permeation side of the high-temperature ion transport membrane oxygen generation unit (13) is connected with the inlet of the gasification furnace (1).
2. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 1, characterized in that the temperature inside the high temperature ion transport membrane oxygen generation unit (13) is more than 400 ℃.
3. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 1, characterized in that the working pressure of the high temperature ion transport membrane oxygen generation unit (13) is 15-20 bar.
4. The IGCC system for integrated high temperature ion transport membrane oxygen generation as claimed in claim 1, wherein a gas cooler (2), a dust removal unit (3), a desulfurization unit (5) and a synthesis gas modulation unit (7) are connected between the gasification furnace (1) and the combustion chamber (8) in sequence, the inlet of the gas cooler (2) is connected with the outlet of the gasification furnace (1), and the outlet of the synthesis gas modulation unit (7) is connected with the inlet of the combustion chamber (8).
5. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 4, characterized in that a low temperature waste heat recovery unit (4) is arranged between the dust removal unit (3) and the desulphurization unit (5).
6. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 4, characterized in that the outlet of the gas cooler (2) is connected with the inlet of the waste heat boiler (11), and the outlet of the waste heat boiler (11) is connected with the inlet of the steam turbine (12).
7. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 4, characterized by a sulphur recovery unit (6) connected to the desulphurisation unit (5).
8. An IGCC system with integrated high temperature ion transport membrane oxygen generation according to claim 4, characterized in that the dust removal unit (3) outlet is connected with the gasifier (1) inlet.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113623075A (en) * | 2021-09-15 | 2021-11-09 | 中国华能集团清洁能源技术研究院有限公司 | IGCC system integrating high-temperature ion transport membrane oxygen generation and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113623075A (en) * | 2021-09-15 | 2021-11-09 | 中国华能集团清洁能源技术研究院有限公司 | IGCC system integrating high-temperature ion transport membrane oxygen generation and working method thereof |
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