Self-propagating pyrolysis system applied to solid waste treatment

Abstract

A self-propagating pyrolysis system applied to solid waste treatment is composed of a chain belt type conveyor, a distribution device, a ventilation loosening device, a pyrolysis device composed of alow-temperature pyrolysis section, a self-propagating high-temperature pyrolysis section and a self-propagating pyrolysis section, a material collecting and returning device and the like. According tothe self-propagating pyrolysis system, air in the high-temperature pyrolysis section is heated through a gas combustion mode, flames do not make contact with a material, and the situation that the material is fused and subjected to caking due to the fact that the temperature of part of the material is too high is avoided; high-temperature air is subjected to self-propagating heating from the upper layer to the lower layer of the material, and the effect that organic matter in the material is sufficiently decomposed without stirring the material can be achieved. In the system, pyrolysis is divided into the low-temperature pyrolysis section, the self-propagating high-temperature pyrolysis section and the self-propagating pyrolysis section, the three sections adopt different structures, through the different heating modes, the pyrolysis temperature can be effectively adjusted and controlled, the self-propagating high-temperature pyrolysis section is shortened, it is ensured that the material are sufficiently decomposed through the self-propagating pyrolysis mode, and energy resource wasting is avoided.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to the technology of applying self-propagating pyrolysis technology to waste salt with high organic content. Background technique [0002] Sodium chloride is an important strategic resource and a commonly used chemical raw material. Sodium chloride is used as a raw material in many chemical productions, and there are also many by-products of sodium chloride in chemical production. These by-products of sodium chloride contain Various organic and inorganic impurities have complex components, and cannot be directly utilized as industrial raw material salt. Since sodium chloride itself is a relatively low-value chemical product, the cost of recycling these by-product sodium chloride salt slag has been greatly challenged, and the enthusiasm of enterprises is obviously not high. [0003] In foreign countries, most of this by-product salt slag is directly dumped into the oce...

AI Technical Summary

Problems solved by technology

This method is more suitable for by-product salt slag with low impurity content and single impurity composition. Its disadvantage is that there are secondary pollution problems such as reprocessing of washing water or organic solvents: in addition, the impurity content in by-product salt slag is often unstable, and washing It is difficult to control the amount of water or solvent used, the impurities are difficult to wash, and it is difficult to realize industrialization

Due to the wide range of sources of by-product salt residue, the harmful impurities in salt residue are complicated and difficult to deal with

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