CN210601586U - Coal dry distillation, industrial oxygen generation and coal-fired thermal power boiler coupling process system - Google Patents
Coal dry distillation, industrial oxygen generation and coal-fired thermal power boiler coupling process system Download PDFInfo
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- CN210601586U CN210601586U CN201920051171.5U CN201920051171U CN210601586U CN 210601586 U CN210601586 U CN 210601586U CN 201920051171 U CN201920051171 U CN 201920051171U CN 210601586 U CN210601586 U CN 210601586U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The process system comprises an oxygen generation system, a coal dry distillation system, a coal-fired thermal power boiler, an oxygen-enriched combustion system, a boiler flue gas heating device and a waste treatment device, wherein oxygen prepared by the oxygen generation system and dry distillation coal gas prepared by the coal dry distillation system are conveyed to the oxygen-enriched combustion system and the boiler flue gas heating device through pipelines, and waste water and waste gas of the coal dry distillation system enter the waste treatment device and are introduced into the coal-fired thermal power boiler.
Description
The technical field is as follows:
the utility model belongs to coal-fired thermal power field, concretely relates to coal dry distillation, industry system oxygen and coal-fired thermal power boiler coupling process system.
Background art:
firstly, the thermal power industry develops at a high speed for many years, the social demand tends to saturate the capacity of the thermal power industry, and meanwhile, the thermal power generation energy is extruded by the social demand and the consumption of new energy due to the rapid development of renewable energy sources (wind power, solar power and the like). Coal-fired thermal power enterprises face strong market pressure, coal-fired cost is increased year by year, external environmental protection pressure is high, and the problem of how to increase income per se is faced. Wherein, energy-concerving and environment-protective pressure mainly has: how to reduce the emission and protect the ecological environment; how to reduce energy consumption and improve power generation benefits; how to improve the peak regulation capability of the unit and consume renewable energy sources and the like.
Secondly, the resource characteristics of China are rich coal, poor oil and less gas, along with the recent transformation of economic structures and the increasingly prominent environmental problems of China, the coal proportion can be continuously reduced and the total amount can be continuously increased in an energy consumption structure. Coal is still the main energy of China for a long time in the future. However, environmental protection pressure and other factors will put higher and higher requirements on the utilization of coal, especially the utilization of low-rank coal. The clean and efficient utilization of coal is a main factor for restricting the development of coal chemical industry.
Thirdly, the mature oxygen-enriched combustion technology is successfully applied to the thermal power boiler, can realize the oil saving, peak regulation, nitrogen reduction, coal consumption reduction and the like of the thermal power boiler, but needs to use fuel oil or fuel gas and the like.
Based on the structural characteristics of energy in China, the application requirements of various industries and the tension situation of the thermal power industry, a comprehensive technology is urgently needed in the coal-fired thermal power generation industry, industrial resources are fully utilized, the comprehensive application of coal-to-electricity integration is realized, the pressure of the thermal power industry is relieved on the basis of realizing energy conservation and emission reduction, the operating field of a power plant is expanded, and the overall benefit of the thermal power industry is improved.
The utility model has the following contents:
based on above-mentioned current situation, the utility model provides a coal dry distillation, industry system oxygen and coal-fired thermal power boiler coupling process system introduces the oxygen boosting combustion technology with dry distillation coal gas and system oxygen, on the basis of perfecting the oxygen boosting combustion technology, realizes the clean high-efficient utilization of coal, realizes thermal power industry energy saving and emission reduction's requirement, reduces the power generation cost of power plant simultaneously again, accords with the sustainable development strategy of country.
The utility model provides a coal carbonization, industry system oxygen and coal-fired thermal power boiler coupling process systems, this process systems has included system oxygen system, coal carbonization system, coal-fired thermal power boiler, its characterized in that: the process system also comprises an oxygen-enriched combustion system, a boiler flue gas heating device and a waste treatment device, wherein oxygen prepared by the oxygen preparation system and dry distillation coal gas prepared by the coal dry distillation system are conveyed to the oxygen-enriched combustion system and the boiler flue gas heating device through pipelines, and waste water and waste gas of the coal dry distillation system enter the waste treatment device and are introduced into the coal-fired thermal power boiler.
By adopting the method, the dry distillation coal gas and the oxygen are used as auxiliary energy sources for oxygen-enriched combustion, fuel oil or natural gas is not required to be consumed, and the energy-saving and emission-reduction operation of the thermal power boiler is realized. Coal gas is generated through coal dry distillation, oxygen is generated through adsorption type oxygen generation (or cryogenic air separation oxygen generation), the coal gas and the oxygen are premixed and combusted in an oxygen-rich low-nitrogen combustor, and the whole primary air pulverized coal flow is ignited in a grading manner, so that the primary air pulverized coal flow enters a hearth in a mode of firing in advance to release heat and combust, and the deep peak regulation operation of the rated load of a unit set which is less than or equal to 30 percent is realized; the emission of nitrogen oxides in a boiler is reduced in a double-inhibition double-reduction mode; coal gas is introduced into the boiler to be combusted in an oxygen-enriched combustion mode to replace coal-fired combustion, so that the standard coal consumption of power generation is reduced, and the whole carbon emission of the coal-fired boiler is reduced; the fuel oil of the boiler is saved by a mode of replacing oil with coal and supporting combustion with oxygen; the center of flame is raised by operating the oxygen-enriched low-nitrogen burner on the upper layer of the boiler, and the flue gas temperature rising device of the boiler is operated, so that the flue gas temperature (more than or equal to 320 ℃) at the SCR inlet is increased, and the safe and efficient operation of the SCR is ensured; meanwhile, wastewater and waste gas generated by the coal dry distillation system are introduced into a hearth of the coal-fired thermal power boiler through a waste treatment device and are finally treated through an energy-saving and environment-friendly device of the coal-fired thermal power boiler, so that no pollutant is discharged. Thereby realizing the coupling of the coal gasification electricity.
The further technical scheme is that the oxygen-enriched combustion system is arranged at a primary air powder spraying opening of the coal-fired thermal power boiler.
A further technical scheme is that the boiler flue gas heating device is arranged at the upstream of the inlet of the denitration system of the coal-fired thermal power boiler.
By adopting the method, the oxygen generation system generates oxygen, the coal carbonization system generates carbonization coal gas, and then the oxygen and the carbonization coal gas are conveyed to the oxygen-enriched combustion system and the boiler flue gas heating device through pipelines. The oxygen-enriched combustion system is arranged at a primary air-powder nozzle of the coal-fired thermal power boiler, oxygen, dry-distilled coal gas and primary air powder are premixed and combusted wholly or locally in the oxygen-enriched combustion system, so that the primary air-powder is ignited and then enters a hearth of the coal-fired thermal power boiler to start heat release, and therefore the coal-fired thermal power boiler is oil-saving, peak regulation, nitrogen reduction, coal consumption reduction and the like; the boiler flue gas heating device is arranged at the upstream of the inlet of the denitration system of the coal-fired thermal power boiler, and oxygen and dry distillation coal gas are wholly or locally premixed and combusted in the boiler flue gas heating device to generate heat to heat flue gas, so that the flue gas temperature meets the operation requirement of the denitration device.
The further technical proposal is that the raw material coal of the coal dry distillation system is pulverized coal or granular pulverized coal.
By adopting the method, (1) when the raw material coal is pulverized coal, the raw material pulverized coal is made into molded coal by a special adhesive, and clean molded carbon is produced by a coal dry distillation system and sold; (2) when the raw material coal is granular coal, semi-coke is produced through a coal carbonization system and sold to the outside or the semi-coke is made into activated carbon by fully applying steam resources of a coal-fired thermal power boiler and sold to the outside; (3) when the raw material coal is granular pulverized coal, the granular coal and the pulverized coal are separated through a screening device, and when the pulverized coal is used, the button (1) is pressed, and when the granular coal is used, the button (2) is pressed. The tar produced by the coal dry distillation system can be sold to the outside.
On the basis, on the basis of an oxygen-enriched combustion energy-saving emission-reducing comprehensive technology, industrial devices such as a coal carbonization and oxygen generation technology and the like are scientifically and efficiently introduced, carbonization coal gas is used as an auxiliary fuel, oxygen is produced by air to participate in oxygen-enriched combustion energy-saving emission reduction, the oxygen and the carbonization coal gas become coal-fired thermal power or indispensable 'production data', the combustion efficiency is improved, the use of fuel oil or natural gas is avoided, and the operation cost of the oxygen-enriched combustion energy-saving emission-reducing comprehensive technology is greatly reduced. The auxiliary products (clean carbon, semi-coke and industrial gas) generated by the dry distillation coal gas and the oxygen generation industrial device can increase the efficiency of a power plant, and the dry distillation coal gas device is integrally and environmentally-friendly incorporated into a coal-fired unit, thereby truly achieving the industrial mode of front chemical engineering and rear power plants. Therefore, the purposes of energy conservation and emission reduction of a power plant are realized, and a diversified operation mode of a semi-coke and clean carbon industry and an oxygen generation industry which are generated by taking oxygen-enriched combustion energy conservation and emission reduction as a center is formed. The harmonious coexistence of human and nature is realized, the purposes of cyclic emission reduction and cyclic economy are achieved, and the social contribution force of resource conservation and environmental friendliness is accelerated.
Drawings
FIG. 1 is a flow chart of an embodiment process system of the present invention
Detailed Description
The present invention will be further explained with reference to the following embodiments and drawings.
As shown in figure 1, the process system comprises an oxygen generation system, a coal dry distillation system and a coal-fired thermal power boiler, and is characterized in that: the process system also comprises an oxygen-enriched combustion system, a boiler flue gas heating device and a waste treatment device, wherein oxygen prepared by the oxygen preparation system and dry distillation coal gas prepared by the coal dry distillation system are conveyed to the oxygen-enriched combustion system and the boiler flue gas heating device through pipelines, and waste water and waste gas of the coal dry distillation system enter the waste treatment device and are introduced into the coal-fired thermal power boiler.
Therefore, the dry distillation coal gas and the oxygen are used as auxiliary energy sources for oxygen-enriched combustion, fuel oil or natural gas is not required to be consumed, and the energy-saving and emission-reducing operation of the thermal power boiler is realized. Coal gas is generated through coal dry distillation, oxygen is generated through adsorption type oxygen generation (or cryogenic air separation oxygen generation), the coal gas and the oxygen are premixed and combusted in an oxygen-rich low-nitrogen combustor, and the whole primary air pulverized coal flow is ignited in a grading manner, so that the primary air pulverized coal flow enters a hearth in a mode of firing in advance to release heat and combust, and the deep peak regulation operation of the rated load of a unit set which is less than or equal to 30 percent is realized; the emission of nitrogen oxides in a boiler is reduced in a double-inhibition double-reduction mode; coal gas is introduced into the boiler to be combusted in an oxygen-enriched combustion mode to replace coal-fired combustion, so that the standard coal consumption of power generation is reduced, and the whole carbon emission of the coal-fired boiler is reduced; the fuel oil of the boiler is saved by a mode of replacing oil with coal and supporting combustion with oxygen; the center of flame is raised by operating the oxygen-enriched low-nitrogen burner on the upper layer of the boiler, and the flue gas temperature rising device of the boiler is operated, so that the flue gas temperature (more than or equal to 320 ℃) at the SCR inlet is increased, and the safe and efficient operation of the SCR is ensured; meanwhile, wastewater and waste gas generated by the coal dry distillation system are introduced into a hearth of the coal-fired thermal power boiler through a waste treatment device and are finally treated through an energy-saving and environment-friendly device of the coal-fired thermal power boiler, so that no pollutant is discharged. Thereby realizing the coupling of the coal gasification electricity.
The oxygen-enriched combustion system is arranged at a primary air-powder spraying opening of the coal-fired thermal power boiler, and the boiler flue gas heating device is arranged at the upstream of an inlet of the denitration system of the coal-fired thermal power boiler.
Therefore, the oxygen generation system produces oxygen, the coal dry distillation system produces dry distillation coal gas, and then the oxygen and the dry distillation coal gas are conveyed to the oxygen-enriched combustion system and the boiler flue gas heating device through pipelines. The oxygen-enriched combustion system is arranged at a primary air-powder nozzle of the coal-fired thermal power boiler, oxygen, dry-distilled coal gas and primary air powder are premixed and combusted wholly or locally in the oxygen-enriched combustion system, so that the primary air-powder is ignited and then enters a hearth of the coal-fired thermal power boiler to start heat release, and therefore the coal-fired thermal power boiler is oil-saving, peak regulation, nitrogen reduction, coal consumption reduction and the like; the boiler flue gas heating device is arranged at the upstream of the inlet of the denitration system of the coal-fired thermal power boiler, and oxygen and dry distillation coal gas are wholly or locally premixed and combusted in the boiler flue gas heating device to generate heat to heat flue gas, so that the flue gas temperature meets the operation requirement of the denitration device.
The raw material coal of the coal carbonization system is pulverized coal or granular pulverized coal.
Therefore, (1) when the raw material coal is pulverized coal, the raw material pulverized coal is made into molded coal through a special adhesive, and clean molded carbon is produced through a coal dry distillation system and sold to the outside; (2) when the raw material coal is granular coal, semi-coke is produced through a coal carbonization system and sold to the outside or the semi-coke is made into activated carbon by fully applying steam resources of a coal-fired thermal power boiler and sold to the outside; (3) when the raw material coal is granular pulverized coal, the granular coal and the pulverized coal are separated through a screening device, and when the pulverized coal is used, the button (1) is pressed, and when the granular coal is used, the button (2) is pressed. The tar produced by the coal dry distillation system can be sold to the outside.
On the basis, on the basis of an oxygen-enriched combustion energy-saving emission-reducing comprehensive technology, industrial devices such as a coal carbonization and oxygen generation technology and the like are scientifically and efficiently introduced, carbonization coal gas is used as an auxiliary fuel, oxygen is produced by air to participate in oxygen-enriched combustion energy-saving emission reduction, the oxygen and the carbonization coal gas become coal-fired thermal power or indispensable 'production data', the combustion efficiency is improved, the use of fuel oil or natural gas is avoided, and the operation cost of the oxygen-enriched combustion energy-saving emission-reducing comprehensive technology is greatly reduced. The auxiliary products (clean carbon, semi-coke and industrial gas) generated by the dry distillation coal gas and the oxygen generation industrial device can increase the efficiency of a power plant, and the dry distillation coal gas device is integrally and environmentally-friendly incorporated into a coal-fired unit, thereby truly achieving the industrial mode of front chemical engineering and rear power plants. Therefore, the purposes of energy conservation and emission reduction of a power plant are realized, and a diversified operation mode of a semi-coke and clean carbon industry and an oxygen generation industry which are generated by taking oxygen-enriched combustion energy conservation and emission reduction as a center is formed. The harmonious coexistence of human and nature is realized, the purposes of cyclic emission reduction and cyclic economy are achieved, and the social contribution force of resource conservation and environmental friendliness is accelerated.
In addition to the methods disclosed in this example, other similar processes are also within the scope of this application.
Claims (4)
1. The utility model provides a coal carbonization, industry system oxygen and coal-fired thermal power boiler coupling process systems, this process systems has included system oxygen system, coal carbonization system, coal-fired thermal power boiler, its characterized in that: the process system also comprises an oxygen-enriched combustion system, a boiler flue gas heating device and a waste treatment device, wherein oxygen prepared by the oxygen preparation system and dry distillation coal gas prepared by the coal dry distillation system are conveyed to the oxygen-enriched combustion system and the boiler flue gas heating device through pipelines, and waste water and waste gas of the coal dry distillation system enter the waste treatment device and are introduced into the coal-fired thermal power boiler.
2. The coupled process system of coal carbonization, industrial oxygen generation and coal-fired thermal power boiler according to claim 1, characterized in that: the oxygen-enriched combustion system is arranged at a primary air powder nozzle of the coal-fired thermal power boiler.
3. The coupled process system of coal carbonization, industrial oxygen generation and coal-fired thermal power boiler according to claim 1, characterized in that: the boiler flue gas heating device is arranged at the upstream of the inlet of the denitration system of the coal-fired thermal power boiler.
4. The coupled process system of coal carbonization, industrial oxygen generation and coal-fired thermal power boiler according to claim 1, characterized in that: the raw material coal of the coal carbonization system is pulverized coal or granular pulverized coal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113932216A (en) * | 2021-10-20 | 2022-01-14 | 北京航天迈未科技有限公司 | Carbon neutralization system based on pulverized coal boiler transformation and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113932216A (en) * | 2021-10-20 | 2022-01-14 | 北京航天迈未科技有限公司 | Carbon neutralization system based on pulverized coal boiler transformation and use method thereof |
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