Gas heat carrier low-temperature retort furnace and dry quenching method

Abstract

The invention provides a gas heat carrier low-temperature retort furnace and a dry quenching method. In the furnace, a plurality of gas feeding tracery walls with multi-layer open holes and a plurality of gas collecting tracery walls with multi-layer open holes are arranged, so that gas transversely flows in the furnace, and the gas can be guided out of the furnace through the open holes of the side wall of the gas collecting tracery wall chamber; a basic unit consists of gas feeding tracery walls and gas collecting tracery walls arranged on the upper part, a cooling gas distribution tracery wall arranged on the lower part, a material isolation wall, a mixed gas combustion mixing chamber and the like; and a feed channel on the lower part of the furnace body is connected with a discharging machine so that the materials in the furnace can be uniformly discharged out. According to the invention, a gas transverse flow and coal gas dry quenching method is adopted, and a small-particle raw material with the particle diameter of less than 40mm is used; and the low-temperature retort furnace and the dry quenching method are suitable for seriously smashed solid materials in a hot working process, and the use rate of the raw materials can reach 100%. The low-temperature retort furnace and the dry quenching method provided by the invention are also suitable for drying of small-particle and easily smashed raw materials.

Description

technical field [0001] The invention relates to a gas heat carrier low-temperature carbonization furnace and a coke dry quenching method for solid fuels with small particles and low metamorphism, and belongs to the field of coal chemical industry. It is mainly used to process solid fuels with small particles below 40mm or solid fuels with poor thermal stability (such as lignite, etc.), and produce low-temperature tar, gas and semi-coke through low-temperature dry distillation. The invention can also be used for drying of solid materials. Background technique [0002] Gas heat carrier dry distillation technology originated in the late nineteenth century, invented by Europeans, and reached its peak in the twentieth century. The most representative one is the Lurgi three-stage furnace in Germany, that is, the dry distillation furnace is divided into three parts: drying section, Dry distillation section, cooling section. The raw material used is lignite briquette with a partic...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the technical problems caused when the raw materials used in the process are small particle raw materials or raw materials with poor thermal stability, and the production capacity of the single furnace can be enlarged to more than 200,000 tons / set per year by means of basic unit series and parallel connection. The invention provides a gas heat carrier low-temperature carbonization furnace and a coke CDQ method. Through the optimization of the internal structure of the furnace, short gas passages, low resistance, self-dust removal in the furnace, and self-produced gas are used to cool products, which improves the thermal efficiency of the entire system. usage efficiency

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