Double-bed power generation system for fire coal coupled living garbage pyrolysis and method

Abstract

The invention discloses a double-bed power generation system for fire coal coupled living garbage pyrolysis and a method. The system comprises a fluidized bed fire coal system, a fixed bed garbage gasification system and a synthetic gas treatment system, wherein a heat carrying bed material of a fluidized bed is fed into a gasifier through material circulation to provide energy for gasification; garbage coke generated in gasification is fed back into the fluidized bed through a backflow roller and mixed and combusted with coal powder, and then material balance and carbon conversion and immobilization are ensured; and a gasifier synthetic gas can be used as a combustible gas after being cooled and purified. As two processes of combustion and gasification are coupled, living garbage is converted into combustible gases and coke through gasification, and the coke is subjected to mixed combustion in a coal-fired furnace to replace a part of original coal, a function of combined production of heat, power and gases is achieved, the living garbage is effectively treated while fire coal is saved, pollutants such as dioxin and the like caused by direct garbage incineration are avoided, and the problem that coal cannot be directly mixed and combusted with garbage because of physical parameter differences can be solved.

Description

technical field [0001] The invention belongs to the field of solid waste disposal, and in particular relates to a twin-bed power generation system and method of coal-burning coupled domestic waste pyrolysis. Background technique [0002] With the acceleration of urbanization, the problem of "garbage besieging the city" has become increasingly prominent, and how to realize the harmless disposal of garbage has become an urgent problem to be solved. At present, the most widely used disposal method is waste incineration for power generation, but its disposal capacity is still unable to meet the demand at this stage. Building a new standard-compliant waste incineration power plant requires a huge amount of capital and faces problems such as the "NIMBY effect". At the same time, harmful substances such as dioxins generated during the waste incineration process cause inevitable secondary pollution to the environment. [0003] The pyrolysis and gasification technology of waste is a...

AI Technical Summary

Problems solved by technology

However, domestic waste has high water content, low calorific value, and large geometric size. Its physical parameters are too different from coal powder, so it cannot be effectively blended directly with coal powder.

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