CFB oxygen-enriched combustion smoke near zero emission power generation system
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An oxygen-enriched combustion and near-zero emission technology, applied in the field of coal-fired boilers in power stations, can solve problems such as waste of resources, recycling, and increased operating costs, and achieve good commercial value, enhance adaptability, and improve boiler efficiency.
Inactive Publication Date: 2015-11-11
SICHUAN CHUANGUO BOILER
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However, these measures for the emission of fossil fuel combustion products are not well combined. They are all independently considered to remove them, and chemical raw materials such as sulfides and nitrogen oxides are not recycled, which increases operating costs and a waste of resources
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[0023] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.
[0024] figure 1 It is an example of a CFB oxygen-enriched combustion flue gas near-zero emission power generation system. The CFB oxygen-enriched combustion flue gas near-zero emission power generation system consists of a boiler (1), a powder feeding system (2), an air separation device (3), and a chimney (4) , flue gas preheater (5), low temperature heat exchanger (6), dust collector (7), recirculation fan (8), induced draft fan (9), ultra-low temperature heat exchanger (10), condensing heat exchanger ( 11), dehydration device (12), SO2 separation device (13), CO2 capture device (14), filter dust collector (15), N 2 Separator (16), NOx reaction device (17).
[0025] The air separation device (3) is connected with the air supply pipe, and the separated oxygen is sent into the air supply pipe through the valve control, and the r...
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Abstract
The invention provides a CFB oxygen-enriched combustion smoke near zero emission power generation system which is composed of a boiler, a powder feeding system, an air separating device, a chimney, multiple stages of heat exchangers, multiple stages of dust removers, a recirculating fan, an induced draft fan, a dewatering device, an SO2 separating device, a CO2 catching device, an N2 separator, an NOx reaction device and the like. By changing the concentration of oxygen in secondary gas, it is ensured that coal of different types is stably combusted and burnt out, boiler efficiency is improved, and the adaptability of the boiler to loads and coal types is enhanced. Through all the devices, dust, vapor, SO2, NOx, CO2 and the like brought by coal powder combustion smoke are recycled, harmful gas, fine particles and trace elements in the smoke are integrally removed, the smoke exhaust temperature is lowered to be close to the atmosphere temperature, the near zero emission of the combustion smoke is achieved, the environment is protected, and the maximization of resource utilization is achieved.
Description
technical field [0001] The invention relates to a coal-fired boiler technology for a power station, in particular to a circulating fluidized bed (CFB) oxygen-enriched combustion near-zero-emission power generation technology. Background technique [0002] With the development of human industry, the environment and climate change issues have become the concerns of the whole world. The flue gas produced by the combustion of fossil fuels in the power station industry brings a large amount of dust, sulfide, nitrogen oxides and a large amount of carbon dioxide. The combustion products produced by the combustion of fossil fuels have a huge adverse impact on the environment and climate. However, the power station industry, which uses fossil fuels as raw materials, occupies an important position in the use of fossil fuels, and has also become a relatively concentrated source of carbon dioxide and other pollutant emissions, with huge emissions. Therefore, the control and treatment o...
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