Clean combustion poly-generation process system for clean coal

Abstract

The invention relates to a clean combustion poly-generation process system for clean coal. The process system comprises a circulating fluidized bed power generation system, a clean coal production system and a fly ash aggregate manufacturing system; the clean coal production system uses screen underflow coal powder screened by raw coal used by the circulating fluidized bed power generation systemthrough a screening device as raw material, then an additive is added and mixed, forming and drying are carried out, drying uses flue gas waste heat in the circulating fluidized bed power generation system, finally, the clean coal is produced through a medium-temperature pyrolysis furnace, and the middle-temperature pyrolysis furnace utilizes hot smoke in the circulating fluidized bed power generation system; and the fly ash aggregate manufacturing system uses ash of a dust remover in the circulating fluidized bed power generation system as raw material, then circulating fluidized bed furnaceslag and a aggregate additive are coordinated to be subjected to mixing and granulating, fly ash aggregate is prepared by sintering in a aggregate sintering machine, and the aggregate sintering machine uses raw gas generated by dry distillation of the pyrolysis furnace in the clean coal production system. The clean combustion poly-generation process system is mainly applied to the aspect of wastegas waste heat utilization in a power generation process of a thermal power plant.

Description

technical field [0001] The invention relates to the technical field of power generation in thermal power plants, and more specifically relates to a clean coal clean combustion polygeneration process system. Background technique [0002] The thermal power plant is a clean energy production base, especially the circulating fluidized bed unit is a clean production unit. Dry distillation tops coal, reduces volatile content, changes the characteristics of domestic coal, and provides clean coal is an important means to control smog. During the operation of coal-fired thermal power plants, the loss of smoke exhaust is the largest item of heat loss, which affects the operation efficiency of power generation and the economic benefits of power plant operation. Studies have shown that, in general, when the exhaust gas temperature increases by 10°C, the exhaust gas loss increases by about 0.5%-0.8%, and it also poses a threat to the safe operation of the electrostatic precipitator afte...

AI Technical Summary

Problems solved by technology

[0004] As a by-product of coal-fired power generation, fly ash has a large amount of generation and is difficult to use. The stacking of fly ash takes up a lot of land and brings a series of problems such as air, water and soil pollution.

In order to solve the problem of fly ash collection and reuse, fly ash is used in various fields, such as in the construction field to prepare a large number of bricks, cement, high-strength concrete, etc., but most of them need to be transported and reused, and the added value is low. increase cost

Images