Coal-fired power generation system with superheated steam drying and pulverization
A technology for superheated steam and power generation systems, applied in combustion methods, combustion equipment, fuel supply, etc., can solve the problems of low water dew point, difficulty in recovering water and latent heat of condensation of water vapor, etc., to improve combustion performance and improve particle size uniformity. Poor, adaptive capacity-improving effect
Inactive Publication Date: 2017-01-04
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
It can be seen that due to the huge amount of dry flue gas and the low water dew point, the recovery of moisture in the exhaust gas requires a huge flue gas cooling heat exchanger and a large amount of cooling medium with a sufficiently low temperature, which makes the recovery of moisture from the exhaust gas and the latent heat of condensation of water vapor extremely difficult. Therefore, there is no engineering application to realize the recovery of flue gas water and heat recovery by cooling the exhaust gas of power plant boilers
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Embodiment Construction
[0032] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the following examples will describe in detail the superheated steam drying pulverization coal-fired power generation system related to the present invention in conjunction with the accompanying drawings and examples.
[0033] figure 1 It is a structural block diagram of a superheated steam drying pulverization type coal-fired power generation system in an embodiment of the present invention.
[0034] Such as figure 1 As shown, the superheated steam drying pulverizing coal-fired power generation system 100 includes: a boiler unit 501 , a steam turbine unit 502 , and a generator unit 503 .
[0035] The heat generated by the combustion of raw coal in the boiler unit 501 heats the water to form high-temperature and high-pressure steam that enters the steam turbine unit 502 to do work, and then drives the generator unit 503 to generate electricity.
[00...
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The invention provides a superheated steam drying pulverization type coal-fired power generation system, which is used to drive a generator to generate electricity after burning raw coal, including: a boiler unit, including: a pulverization subsystem, a boiler host subsystem, and an air supply and powder supply unit. System and exhaust steam water recovery subsystem; and steam turbine unit, including water supply pipe, steam delivery pipe and steam turbine, wherein, the pulverization subsystem includes: steam powder generation and drying device, steam powder separation device and desiccant generation device, desiccant generation device Including: using the condensation heat release of steam extraction from the steam turbine to preheat the exhaust steam to form hot exhaust gas heater, using the flue gas from the furnace to further heat the hot exhaust steam to form superheated steam as a desiccant The waste steam and flue gas heater, the waste steam and water recovery subsystem include: a waste steam and water recovery device that uses ambient cold air to condense and recover a part of the exhaust steam.
Description
technical field [0001] The invention relates to the field of coal-fired power generation, in particular to boiler air supply, superheated steam drying pulverization, coal moisture recovery technology and superheated steam drying pulverization type coal-fired power generation system. Background technique [0002] my country is a country rich in coal but lacking in oil and gas. Coal has always been in the core dominant position in my country's energy supply. For a long time to come, the energy structure dominated by coal will continue in my country. Because coal-fired power stations have the characteristics of large-scale concentrated use of coal, which is conducive to efficient and clean utilization of coal, coal is mainly used for power generation at home and abroad. At present in my country, 55% of the total coal output is used for coal-fired thermal power generation. In terms of power structure, thermal power generation is the main power generation method in my country. Ab...
Claims
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IPC IPC(8): F23K1/00F23K3/02F23L15/00F23J15/00F01D15/10F01D25/32
Inventor 马有福
Owner UNIV OF SHANGHAI FOR SCI & TECH