Procedures of thermal treatment for wet wastes, production residues or other residues

Abstract

The invention relates to a heat treating method for damp garbage, producing surplus and other residual matters containing natural and / or synthetic organic compositions. The invention provides a mechanical multistage garbage heat treating method used in combination with the traditional conventional fuel combustion type generating equipment while a material flows and energy flows are exchanged between the two equipments for saving conventional fuel. In the invention, the coarse bulky maters with average grain size above 200 mm are pre-comminuted by mechanical means; the pre-comminuted fine bulky matters with average grain size below 200mm and are moisture content above 20wt% are dewatered mechanically; the mechanically dewatered matters are dried to residual moisture content below 10wt% in a separated drying device by steam; the dried matters are pyrolyzed in a separated device under the temperature of 250 to 650 degrees centigrade into solid phase (cokes) and gas phase (pyrolyzed gas);the pyrolyzed gas is burned in a multiple aperture burner and the generated hot gas is inputted into the combustion chamber of the generating equipment used for solid fuel in hot blast manner.

Description

technical field

[0001] The present invention relates to a method for heat treatment of wet garbage, production residues or other residues containing natural or synthetic organic components. Background technique

[0002] Thermal treatment of waste with organic components has been known for a long time. In conventional waste incineration, clumps of waste are incinerated suprastoichiometrically in a combustor unit with a grate. The aim of the treatment is to reduce the volume of waste as effectively as possible so as to leave as little oxidizable organic compound (TOC) as possible in the combustion residue. In the case of leaving a small amount of oxidizable organic matter, on the one hand, the land occupation can be reduced when the combustion slag is piled up in the garbage dump, and on the other hand, the danger of gas release from the garbage dump can be eliminated.

[0003] Waste incineration is a relatively complex process, in which multiple processes such as drying, dr...