Process for preparing derived fuel by using high-humidity household garbage as raw material

Abstract

The invention discloses a process method for preparing a derived fuel by using high-humidity household garbage as a raw material. According to the process method, the household garbage is used as a main ingredient, and three process steps including manual sorting, pre-dehydration and pre-drying are not needed; The process method is as follows: the household garbage is gradually crushed into powder step by step; an additive of a certain proportion is added in sequence; a fine crushing, stirring and drying integrated machine is used for performing fine crushing while stirring and drying, then baking soda is mixed at 30-50 DEG C for extrusion forming, and finally the mixture is conveyed to a low-temperature dryer for drying. Carbon dioxide gas is released during baking to form a lot of small holes, so that the baking efficiency is improved, the fuel is more loosened and can be burnt more thoroughly, and the aims of energy conservation and zero emission during production are achieved.

Description

technical field [0001] The invention relates to a treatment method for household garbage, in particular to a process for directly using high-humidity household garbage as a raw material to prepare derivative fuel without pre-dehydration or pre-baking. Background technique [0002] There have been a lot of researches at home and abroad on the process of making derived fuels from domestic waste, but few have realized the industrialization of the process. The reason is mainly that the following recognized "high energy consumption" problems cannot be overcome. [0003] 1. Most of the existing techniques for preparing derived fuels from domestic waste use "dry molding". That is, the garbage must go through dehydration or special drying process before forming. Then this faces the following two main problems: [0004] (1) Problem 1: The amount of sewage generated after garbage dehydration is large, and the treatment cost is high. Many scientific research institutes and enterpri...

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Problems solved by technology

[0004] (1) Problem 1: The amount of sewage generated after garbage dehydration is large, and the treatment cost is high

This will undoubtedly increase the burden on the sewage treatment plant, and also greatly increase the cost of garbage disposal

[0005] (2) Problem 2: The energy consumption of the direct baking process of domestic waste is too high, which greatly increases the operating cost of the treatment process

The production cycle of natural air-drying or sun-drying is long, and it is basically infeasible to process domestic waste in large quantities.

[0006] 2. Some inventions use the process of bonding garbage into fuel and then baking, but it is difficult to realize industrialization

The energy consumption of this alone is so high that it is basically not feasible to dispose of household waste in large quantities

[0008] (2) The production process is too long and the process is complicated, so it is impossible to process the household garbage collected on the same day

[0009] In summary, most of the existing technologies have long and complicated process flow, long production cycle, high cost, high energy consumption, low productivity, obvious weaknesses such as waste water and waste gas discharge in the production process, and the production process cannot achieve "zero discharge". Environmental requirements

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