Bottom-blowing pure oxygen enhanced type plasma gasification melting furnace

Abstract

The invention discloses a bottom-blowing pure oxygen enhanced type plasma gasification melting furnace. The bottom-blowing pure oxygen enhanced type plasma gasification melting furnace comprises a furnace body, wherein a drying area, a pyrolysis area and a melting area are sequentially arranged in the furnace body from top to bottom, the diameter of a lower hearth is smaller than that of an upperhearth, a dangerous waste material inlet is formed in the drying area of the hearth, the upper hearth and the lower hearth are connected through a conical structure, and two plasma torches are symmetrically arranged on the lower hearth. A cylindrical central oxygen supply pipe is arranged at the bottom of the melting area at the bottom of the furnace body and is fixed on refractory bricks and heatpreservation bricks through a protective sleeve pipe and can be detached and replaced conveniently; pure oxygen is sprayed into the central oxygen supply pipe to provide the required oxygen amount ofresidual carbon with incomplete pyrolysis gasification reaction; the heat generated by combustion of the residual carbon can be supplied to the gasification of the carbonaceous substance; the meltingeffect and the combustion efficiency of the plasma furnace are improved; and meanwhile, the temperature of the hearth can be increased faster and higher.

Description

technical field [0001] The invention belongs to the melting gasification technology of solid hazardous waste, and relates to a bottom-blown pure oxygen enhanced plasma melting hazardous waste gasification system. Background technique [0002] In recent years, the generation of hazardous industrial waste in my country has been increasing year by year, reaching 39.7611 million tons in 2015, of which 29% is disposed of, 20% is stored, and the remaining 51% is comprehensive utilization. Industrial hazardous wastes are distributed in different industries, mainly chemical raw materials and chemical products manufacturing, non-ferrous metal smelting, mining and dressing, and non-metallic mining and dressing industries. When hazardous waste is not properly disposed of, it will pose a major threat to nature and human health. Therefore, a safe and efficient solid waste disposal method is needed in modern society. [0003] Plasma treatment of industrial solid waste basically does not ...

AI Technical Summary

Problems solved by technology

[0004] 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, this method gasifies garbage, and a dioxin treatment device needs to be added to the subsequent gas purification process, which increases the initial one-time investment and greatly increases the equipment cost

Third, using a plasma torch to directly gasify garbage, due to the uneven distribution of its temperature field, the garbage cannot be completely treated at high temperature, and there will be a large amount of dioxins and other harmful substances in the discharged waste residue, which makes the treatment of its waste residue become a problem. a problem

Images