Dehumidification, pyrolysis and gasification device for household garbage, and use method thereof

Abstract

The invention discloses a dehumidification, pyrolysis and gasification device for household garbage, and a use method thereof. The dehumidification, pyrolysis and gasification device for the household garbage comprises a garbage treatment tower, a condensation dehumidifier, a high-temperature air preheater, a low-temperature air preheater and an air blower, wherein the garbage treatment tower is sequentially provided downwards with a drying and pyrolysis chamber, a pyrolysis and gasification chamber and a roasting chamber in the longitudinal direction; and the garbage enters from the upper end of the drying and pyrolysis chamber, the generated damp-hot smoke sequentially passes through the condensation dehumidifier and the roasting chamber, the damp-hot smoke entering the roasting chamber enters the pyrolysis and gasification chamber under the action of a negative pressure, then a water-gas reaction is carried out, and a pyrolysis gas outlet is formed in one end of the pyrolysis and gasification chamber. According to the dehumidification, pyrolysis and gasification device for the household garbage, and the use method thereof which are disclosed by the invention, the retention time of the household garbage in a space can be controlled through adjusting the rotation speed of a grate bar; the heat value of a pyrolysis gas is increased while a water content in the pyrolysis gas is reduced, the risk of coking of a material layer on the rotaring grate bar of the pyrolysis and gasification chamber can also be lowered, and a carbon content in ash residue is lowered; and the household garbage with the water content of greater than 60% can be treated through using the device disclosed by the invention.

Description

technical field [0001] The invention relates to the technical field of solid waste resource treatment, in particular to a domestic waste dehumidification pyrolysis gasification device and a use method thereof. Background technique [0002] Pyrolysis and gasification of existing domestic waste is usually completed in equipment such as fixed beds, fluidized beds, and rotary kilns. The pyrolysis combustible gas is drawn from above the waste, and most of the water in the waste is turned into water vapor and mixed into the pyrolysis gas. As a result, the calorific value of the combustible gas is low, and the temperature of the secondary combustion chamber cannot be raised. In order to meet the environmental requirements of the secondary combustion temperature greater than 850 °C, auxiliary fuel needs to be invested, which increases the cost of waste disposal and limits the popularization and application of domestic waste pyrolysis incineration technology. [0003] Related patent...

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Problems solved by technology

[0002] Pyrolysis and gasification of existing domestic waste is usually completed in equipment such as fixed beds, fluidized beds, and rotary kilns. The pyrolysis combustible gas is drawn from above the waste, and most of the water in the waste is turned into water vapor and mixed into the pyrolysis gas. As a result, the calorific value of combustible gas is low, and the temperature of the secondary combustion chamber cannot be raised

In order to meet the environmental requirements of the secondary combustion temperature greater than 850 ℃, auxiliary fuel needs to be invested, which increases the cost of waste disposal and limits the popularization and application of domestic waste pyrolysis incineration technology

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