Plasma garbage gasification device and process

Abstract

The invention relates to a plasma garbage gasification device and process. The device comprises a gasification reaction chamber, a steam heat exchanger, a steam buffer tank, an air buffer tank, an inner and outer double-cyclone heat exchanging dust collector, a cooling tower, a hydrogen sulfide removal sprayer, a water ring compressor, a gas-water separator, a gas storage tank and a control system of the device, which are connected through a gas pipeline; the gasification reaction chamber comprises an automatic feeding device, an automatic ignition device, a primary gasification zone and a plasma reaction zone; and the plasma reaction zone consists of a secondary refining zone and a gas refining zone. The process comprises the following steps of: gas generation; gasification medium preheating; gas purifying and filtering; and gas compression and storage. The invention has the characteristics of simple structural design, reasonable energy efficiency utilization, low primary input cost and low power consumption, and particularly, harmful substances such as dioxin and the like generated in the gasification process can be effectively removed, the volume reduction ratio is increased, and the waste is turned into the wealth.

Description

technical field [0001] The invention relates to the plasma gasification power generation technology of domestic garbage, in particular to a plasma garbage gasification equipment and a gasification process thereof. 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 is strongly opposed by the public due to pollution problems such as dioxins: domestic waste and other wastes are prone to produce dioxins when the combustion temperature is lower than 300-550 °C; During the incineration of chlorine-containing plastics, the incineration temperature is lower than 800°C, and dioxins are easily generated. Dioxins are ex...

AI Technical Summary

Problems solved by technology

[0005] 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

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