Solid waste plasma gasification pyrolysis recycle transformation method

Abstract

The invention discloses a solid waste plasma gasification pyrolysis recycle transformation method, which belongs to the technical field of garbage disposal, and mainly comprises the four steps of sorting and pretreating wastes, carrying out gasification pyrolysis on plasma, purifying gas and regenerating energy. Through adding a combustion-supporting mixture, an average comprehensive heat value and the fixed carbon content of the solid wastes are improved, so that the power consumption during a plasma gasification pyrolysis process is reduced; meanwhile, the method and a power station are linked to offset a part of and even all electric energy in the later period, so that the operation cost is reduced. A pulsed electromagnetic valve is utilized for spraying a dioxin inhibitor, dioxin is prevented from compounding at a low-temperature area, a later-period filtration and adsorption device is cooperated to thoroughly purify gas, and finally residues produced by gasification can be used for manufacturing microcellular foam glass used as an adsorbing medium, so that cyclic utilization of resources is realized. The solid waste plasma gasification pyrolysis recycle transformation method provided by the invention is high in recovery utilization rate, free of poisonous gas and matter discharge, green and environmentally-friendly, and favorable in economic benefit.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a plasma gasification cracking regeneration conversion method for solid garbage. Background technique [0002] The domestic waste disposal methods in my country are mainly landfill and incineration. Landfill not only occupies a large amount of land, but also pollutes groundwater, which is a last resort. Nevertheless, there are not many sites available for landfill in areas where land resources are scarce. Although the incineration method has a high volume reduction ratio and can recover energy, it has been strongly opposed by the public due to pollution problems such as dioxins. There is an urgent need to develop a new generation of alternative incineration technologies that are environmentally friendly and energy-saving. [0003] Plasma is the fourth state of matter, which has many unique physical and chemical properties different from solid, liquid and gaseous state...

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Problems solved by technology

[0006] However, the current plasma garbage gasification technology still has many deficiencies. First of all, direct gasification of garbage with a plasma torch requires a huge amount of power, and its power consumption rate can reach 30% to 45% of its power generation capacity. Excessive electricity leads to greatly increased operating costs, making it unworthy of commercial operation

Second, compared with incineration, this method of gasifying garbage can effectively remove a large amount of dioxins, but in fact, a small amount of dioxins will be recombined under the action of hydrogen chloride during the condensation of synthetic gas, resulting in the final product The gas cannot be completely called a harmless gas

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