Household garbage disposal system and method

Abstract

The invention discloses a household garbage disposal system and method. The system comprises a drying device which is provided with a first rotary feeding part, a household garbage inlet, a flue gas inlet, a dried household garbage outlet, and a tail gas outlet; a pyrolysis device with a pyrolysis chamber which is further provided with a second rotary feeding part, a dried household garbage inlet,a pyrolysis carbon outlet and a pyrolysis gas outlet; a shell provided with a pyrolysis gas combustor, a first combustion-supporting gas inlet, a post-combustion glue gas outlet and a first post-combustion ash outlet; and a flue gas re-combustion device divided by an internal partition plate into a re-combustion chamber and a separation chamber communicated with each other. A combustion chamber is formed between the shell and the outer wall of the pyrolysis chamber; and the pyrolysis gas combustor is connected with the pyrolysis gas outlet via a pipe. The re-combustion chamber is provided with a post-combustion flue gas inlet, a combustor and a second combustion-supporting gas inlet; the separation chamber is provided with a second post-combustion ash outlet, a post-re-combustion flue gasoutlet and a heat exchange piece; the post-re-combustion flue gas outlet is connected with the flue gas inlet; and the heat exchange piece is provided with a heat exchange medium inlet and a post-heat exchange medium outlet.

Description

technical field [0001] The invention belongs to the technical field of domestic waste treatment, in particular, the invention relates to a system and method for processing domestic waste. Background technique [0002] Pyrolysis of domestic waste refers to the chemical bond breaking and isomerization of macromolecular organic matter in domestic waste by means of heating under anaerobic conditions, and reactions such as polymerization of small molecular organic matter, and finally the transformation of macromolecular organic matter into small molecules. Gas fuel (CH 4 , CO, H 2 etc.), liquid fuels (organic acids, aromatics, tar) and activated coke (biochar, slag) reaction process. [0003] At present, the domestic waste pyrolysis process is generally equipped with a drying furnace and a pyrolysis furnace, and the gas generated by pyrolysis is not recovered in the system; the pyrolysis furnace burns fuel such as diesel oil, and the combustion in the furnace is insufficient du...

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Problems solved by technology

[0003] At present, the domestic waste pyrolysis process is generally equipped with a drying furnace and a pyrolysis furnace, and the gas generated by pyrolysis is not recovered in the system; the pyrolysis furnace burns fuel such as diesel oil, and the combustion in the furnace is insufficient due to insufficient air distribution, resulting in insufficient fuel. Complete combustion, the resulting exhaust gas emits black smoke, or NOx and dioxins exceed the standard after complete combustion

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