Process for making RDF from domestic garbage and high-temperature pyrolysis gasification treatment

Abstract

The invention discloses a process for making RDF from domestic garbage and high-temperature pyrolysis gasification treatment. The process comprises the following procedures of domestic garbage, bag breaking, primary magnetic separation, drum screening, primary breaking, drying, secondary magnetic separation, aluminum magnetic separation, air separation, fine breaking, additives adding, stirring, RDF molding, cooling, screening, gasification, dust removal, cooling, oil removal and dechlorination and desulfurization. Metal, glass, high-value plastic, sand, stone, soil and the like in household waste are completely separated, and the effects of resource recycling and sustainable economic development are achieved.

Description

technical field [0001] The invention relates to the technical field of environmental protection and belongs to a production process, in particular to a process for producing RDF from domestic garbage and a high-temperature pyrolysis gasification process. Background technique [0002] There are many existing processes for producing derived fuels from domestic waste and pyrolysis and gasification. The general process flow and main steps are as follows: waste dehydration—garbage sorting—shredding—preparation of RDF—gasification—gas purification process. [0003] The problems faced by this technological process are: 1. The dehydration process can produce a large amount of leachate and foul smell. However, the leachate and odor treatment process is complicated and the economic investment is large, which will lead to a sharp increase in the economic cost of waste treatment, so that many cities in China cannot afford the huge disposal costs caused by it. [0004] 2. During gasific...

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Problems solved by technology

[0003] The problems faced by this technological process are: 1. The dehydration process will produce a large amount of leachate and foul smell

Due to the high density and heavy weight of derivative fuel (RDF), it is difficult to realize fluidized gasification

If the fuel is pulverized and then gasified, the light substances in the fuel such as plastics are easily sucked out with the mixed gas, causing pipeline blockage, increasing the difficulty of purifying the mixed gas, and causing garbage to be discharged outside. Incomplete

[0005] 3. Derived fuel (RDF) has insufficient compactness, high water content, and is easy to disperse and break, resulting in insufficient gaps between fuels

As a result, it is difficult to supply oxygen during gasification, and it is also difficult to discharge the mixed gas after the gas, so the gasification is not sufficient and the efficiency is low

[0006] 4. Dioxin, NOX, S0X and other harmful gases and a large amount of water vapor are produced during the gasification process, which makes the purification of the mixed gasification after gasification more difficult and the cost of purification increases

[0007] To sum up, the problems that are currently difficult to promote and popularize such methods are:

Only considering the use of heat energy in the gasification process, without making preparations for gasification efficiency and flue gas treatment, resulting in slow gasification process and high purification cost of the generated mixed gas

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