A process and device for carbonization treatment of waste salt with superheated steam

Abstract

The invention provides a process method and a device for carbonizing waste salt superheated steam, wherein the waste salt enriched with organic matters is conveyed to a first rake type anaerobic carbonization furnace through a feed hopper and a quantitative conveyor for operation of a carbonization pretreatment section, and trace moisture and volatile organic matters in a material are mainly removed; the material further enters a second rake type anaerobic carbonization furnace from a discharge port of the first rake type anaerobic carbonization furnace; the pretreated material reacts with thesuperheated steam at the temperature of 700-800 DEG C formed by high-temperature heated saturated steam in the second rake type anaerobic carbonization furnace, and the organic matters in the waste salt are decomposed and carbonized; finally, the material is packaged and discharged after being cooled by a discharging cooling conveyor; the superheated steam and decomposition gas after the reactionof the second rake type anaerobic carbonization furnace with the organic matter in the material are burned again at high temperature through an exhaust gas burner, then heat exchange is carried out for the saturated steam through a first preheater, the exhaust gas finally goes to other exhaust gas treatment device; the device has the advantages of simple structure, low cost, and better energy saving and emission reduction effects.

Description

technical field [0001] The invention relates to a continuous treatment method and device for industrial waste salt, in particular to a process method and device for waste salt superheated steam carbonization treatment. Background technique [0002] In the organic synthesis industry, fine chemical industry, pesticide industry and many other industries, it is often necessary to separate the synthetic product by alkalization and acidification in the product purification stage. During this process, the organic matter dissolved in the acid-base process water is discharged with the separation mother liquor system, and then use multi-effect or MVR technology for evaporative crystallization reduction treatment. Due to the enrichment of organic matter, the waste salt treated by this method will contain a large amount of toxic and harmful organic matter. The waste salt needs special treatment because of its great damage to the environment and the great threat to human and livestock he...

AI Technical Summary

Problems solved by technology

The main problems of using this method are: 1. Due to the high temperature of fuel combustion, the temperature in the kiln is difficult to control, resulting in high local temperature, resulting in the melting of waste salt and damage to refractory materials.

2. The filling rate of the equipment is low and the calorific value of the air is low, resulting in high equipment occupation and cost

[0007] A patented industrial waste salt treatment device using a radiant tube carbonization decomposition furnace: (Patent No.: CN108841401A) discloses an oxygen-free carbonization decomposition treatment of industrial waste salt, which overcomes the traditional rotary kiln incineration method and harmless chemical filling However, its energy-saving, harmless and simplistic effects on carbonization of waste salt still need to be developed

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