Device and method for multi-chamber pyrolysis gasification of household garbage

Abstract

The invention belongs to the technical field of garbage treatment and relates to a device and method for multi-chamber pyrolysis gasification of household garbage. The device for multi-chamber pyrolysis gasification of household garbage comprises a furnace body unit, a deslagging unit and an air input unit. The furnace body unit comprises a feeding port. A drying pyrolysis chamber, a pyrolysis gasification chamber and a roasting chamber are sequentially arranged below the feeding port from top to bottom. The deslagging unit comprises a deslagging chamber, a slag remover, a deslagging fire grate and a deslagging chamber ash bucket. The air input unit comprises an air blower, a high-temperature air preheater and a low-temperature air preheater. The method for pyrolysis gasification comprises the steps of feeding, burning, capacity shrinkage, pyrolysis gasification and deslagging and the like. The device and method for multi-chamber pyrolysis gasification of household garbage has the advantages that by regulating the rotating speed of a fire bar, staying time of the household garbage in the space is controlled, the device adapts to household garbage moisture and heat value changes, and treatment efficiency is improved. The material movement speed and the pyrolysis gasification agent adding speed are matched, and control over an optimal process of drying, gasification, oxidation and burning and burnout is implemented.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment, and relates to a multi-chamber pyrolysis gasification device and method for domestic garbage. Background technique [0002] China's "Twelfth Five-Year Plan" National Urban Household Waste Harmless Treatment Facilities Construction Plan requires that in 2015, the capacity of domestic waste incineration treatment facilities accounted for 35% of the national urban life harmless treatment capacity, and the eastern region reached 48%. Incineration is currently the main mode of domestic waste disposal in my country. [0003] There are mainly four types of existing incineration technologies: mechanical grate incineration, fluidized bed incineration, rotary kiln incineration, and pyrolysis gasification incineration. Although the mechanical grate incineration technology is the most widely used in my country at present, the pyrolysis gasification incineration technology has become an internation...

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Problems solved by technology

[0007] In this patent application, the precise control of temperature and pyrolysis gasification agent cannot be carried out according to the characteristics of each process; the efficiency of time and space (unit time and unit space) is low; problems such as excessive local temperature and coking are easy to occur

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