A coal-fired power station boiler exhaust waste heat and water recovery system and operation method
A technology for coal-fired power plants and water recovery, applied in preheating, feed water heaters, combustion technology relief, etc., can solve the problems of large systems, poor operation safety and stability, etc., and achieve simple systems, high energy efficiency levels, and water-saving effects Effect
Active Publication Date: 2019-07-02
XI AN JIAOTONG UNIV
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Problems solved by technology
[0003] The existing flue gas dehydration process mainly adopts the partition wall cooling method, the system is huge and the operation safety and stability are poor
Method used
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0020] Such as figure 1 As shown, a coal-fired power plant boiler exhaust heat and water recovery system of the present invention includes a boiler 1, a steam turbine 7, a steam turbine cooling and heat recovery system 8, a low-pressure economizer 2, a dust collector 3, a desulfurization tower 4 and The chimney 5 also includes a generator 61, an absorber 62, a solution processing device 63, a solution pump 64 and a condenser 65; the steam inlet of the generator 61 communicates with the steam turbine 7 extraction ports, and the steam condensate outlet is cooled back to the steam turbine. The thermal system 8 is connected, the concentrated solution outlet of the generator 61 is connected with the concentrated solution inlet of the absorber 62; the flue gas outlet of the desulfurization tower 4 is connected with the flue gas inlet of the...
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Provided are a coal-fired power plant boiler smoke discharging waste heat and water recovery system and an operation method. The system comprises a generator, an absorber, a solution treatment device,a solution pump and a condenser; a steam inlet of the generator communicates with an extraction opening of a steam turbine; a steam condensation water outlet communicates with a steam turbine coolingregenerative system; a concentrated solution outlet of the generator communicates with a concentrated solution inlet of the absorber; a smoke outlet of a desulfurization tower communicates with a smoke inlet of the absorber, and a smoke outlet of the absorber; a dilute solution outlet of the absorber communicates with the solution treatment device; a solution outlet of the solution treatment device communicates with a dilute solution inlet of the generator through the solution pump; a steam outlet of the generator communicates with the condenser; a cooling working medium inlet / outlet of the condenser communicates with the steam turbine cooling regenerative system; and a cooling working medium of the absorber communicates with an air heater through a pipeline and a circulation pump. The system is simple, the degree of gradient utilization of energy is high, the energy efficiency level of the system is high, and the energy saving and water saving effects are remarkable.
Description
technical field [0001] The invention relates to the technical field of coal-fired power station boilers, in particular to a coal-fired power station boiler exhaust heat and water recovery system and an operating method. Background technique [0002] Improving the efficiency of coal-fired power plants and reducing pollutant emissions from coal-fired power plants are key issues that have long been concerned and focused on in the development of the power industry. With the development of technology, low-pressure economizers are widely used in the waste heat recovery of boiler exhaust, and the waste heat recovery of power station boiler exhaust can improve the efficiency of coal-fired power plants. The treatment of boiler exhaust can reduce the pollutant emission level of coal-fired power plants. The tails of modern coal-fired power plant boilers are equipped with dust collectors to remove solid pollutants in the flue gas, and desulfurization towers are arranged to remove sulfur...
Claims
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IPC IPC(8): F25B15/02F22D1/12F23J15/06F01K17/00
CPCF01K17/00F22D1/12F23J15/06F25B15/025Y02B30/625Y02E20/30
Inventor 刘明严俊杰种道彤刘继平邢秦安
Owner XI AN JIAOTONG UNIV