Process for preparing derived fuel RDF-5 through coupling of township domestic garbage and biomass

Abstract

The invention discloses a process for preparing a derived fuel RDF-5 through coupling of township domestic garbage and biomass. The process comprises the following steps: 1) coarse crushing; 2) screening; 3) magnetic separation; 4) bouncing separation; 5) drying: drying remaining township domestic garbage combustibles to a moisture content of 20-30%; 6) mixing: mixing, by mass, 40 to 60% of the dried township domestic garbage combustibles, 40 to 60% of biomass particles and an additive, and performing fine crushing, wherein the additive comprises, based on the total mass of the township domestic garbage and the biomass particles, 5-10% of white coal, 3-6% of calcium hydroxide, 1-2% of polyethylene glycol and 1-2% of borax; 7) conditioning and granulation: sending the above mixed materialsto a granulator for extrusion and granulation, wherein the materials are pressurized and heated in the process of granulation so as to complete physical and chemical conditioning; and 8) air-drying and cooling. The process of the invention can realize the resourceful and harmless utilization of the garbage, has the advantages of convenient treatment, low cost and small environmental pollution, andcan greatly improve comprehensive benefits.

Description

technical field [0001] The invention relates to a technology for preparing derivative fuel RDF-5 by coupling township domestic garbage and biomass. Background technique [0002] With the rapid development of our country's economy, a lot of resources are consumed and a lot of waste is produced, which seriously affects and restricts economic development and threatens people's living quality. Economic development and pollution control have become the consensus of modern society, and the direction of environmental protection is to implement the strategy of sustainable development. Environmental protection is a basic state policy of our country. The country has listed the energy-saving and environmental protection industry as one of the seven strategic emerging industries that the country has accelerated its cultivation and development. [0003] According to statistics, in 2011, my country's urban domestic garbage production was about 277 million tons, accounting for about 26...

AI Technical Summary

Problems solved by technology

Among them, sanitary landfill wastes a lot of land resources, and it is easy to cause pollution to groundwater sources; incineration for power generation can reduce the volume of waste by 50% to 95%, but it is expensive and expensive, and it is easy to release dioxins, mercury, etc. Hazardous substances, residual slag and dust are also toxic and harmful, and a large amount of recyclable resources are burned; the composting cycle is long, and organic and inorganic substances need to be separated before they can be recycled

[0005] In the face of a large amount of township garbage in our country, because the townships are far away from the city, they are concentrated in the city's waste incinerators for incineration. The long distance transportation costs are high and will cause secondary pollution. Up to now, there is no more environmentally friendly and resource-based treatment method

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