Plasma rotary kiln gasification system and pyrolysis gasification method thereof

Abstract

The invention provides a plasma rotary kiln gasification system. The gasification system comprises a rotary kiln gasification furnace, a cyclone separator and a plasma auxiliary gasification melting furnace which communicate with one another through pipes. The plasma auxiliary gasification melting furnace is used for melting gasification of carbon-containing furnace slag discharged by the rotary kiln gasification furnace and carbon-containing flying dust gathered by the cyclone separator. The invention further provides a pyrolysis gasification method of the plasma rotary kiln gasification system. According to the plasma rotary kiln gasification system and the pyrolysis gasification method thereof, the carbon-containing flying dust and the carbon-containing furnace slag of a rotary kiln are subjected to combustion gasification through a plasma auxiliary gasification technology and melted into harmless glass bodies, and thus emission of pollutants such as dioxin is reduced; and high-temperature synthesis gas generated through carbon residue gasification is fed into the rotary kiln gasification furnace, heat is supplemented to pyrolysis and reduction of carbon-containing raw materials, high temperature which cannot be reached through traditional gasification methods is reached, and the carbon conversion rate is increased.

Description

technical field [0001] The invention relates to the technical field of gasification of carbon-containing solid raw materials, in particular to a plasma rotary kiln gasification system and a pyrolysis gasification method thereof. Background technique [0002] The rotary kiln gasifier adopts a rotary kiln similar to cement, lime, and hazardous waste treatment industries. The fuel enters the slowly rotating kiln from the upstream end, and the air supply is controlled along the way. When the fuel moves along the length of the kiln When turned over, the fuel mixes with air and vaporizes. The many advantages of the rotary kiln are especially suitable for the treatment of biomass, hazardous waste, municipal waste, etc., and are especially suitable for distributed energy. A lot of work has gone into mixing and achieving deep gasification, looking to find the optimum balance of minimal flaring, optimum syngas, ease of operation, low maintenance, predictability and high reliability. ...

AI Technical Summary

Problems solved by technology

[0012] (1) Treating garbage with a rotary kiln will cause the discharge of pollutants such as dioxins;

[0013] (2) The reduction zone of the rotary kiln gasifier is an endothermic reaction. Due to the longer kiln, the temperature in the reduction zone gradually decreases, reducing the carbon conversion rate;

[0014] (3) For rotary kiln gasifiers, fluidized bed gasifiers, etc., the carbon content of fly ash and slag is generally high, and it is difficult to handle due to low reactivity

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