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Heat treatment method of industrial waste salt containing aluminum chloride

A heat treatment method and technology for industrial waste salt, applied in combustion methods, incinerators, lighting and heating equipment, etc., can solve the problems of increased processing costs and complicated process flow, and achieve the effects of simple implementation, alleviating coking, and low cost

Pending Publication Date: 2021-12-21
ZHE JIANG ECO ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The process flow of the above two schemes is relatively complicated, and the processing cost will increase accordingly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Characteristics of blended industrial waste salt 1: moisture content 5.2%, insoluble matter 2.8%, total organic carbon (TOC) 4.8%, sodium sulfate (Na 2 SO 4 ) is 49.6%, sodium chloride (NaCl) is 30.1%. Characteristics of blended industrial waste salt 2: moisture content 4.6%, insoluble content 4.4%, TOC 3.4%, NaCl 68.5%, NaCl 2 SO 4 was 10.3%. Characteristics of industrial waste salt 3 to be treated: moisture content 11.7%, insoluble content 3.7%, TOC 10.1%, NaCl 62.4%, aluminum chloride (AlCl 3 ) was 7.8%.

[0017] Mix the untreated industrial waste salt 3 and the blended industrial waste salt 2 in a mass ratio of 1:1, and the AlCl in the resulting mixture 3 The mass fraction is 3.9%, and the resulting mixture is anaerobically pyrolyzed at 500°C for 40 minutes, then oxidized at 600°C with an air flow rate of 1-1.5 kg / h for 20 minutes at a high temperature, and the output TOC is 0.018%. coking.

Embodiment 2

[0023] Keeping the other conditions in Example 1 unchanged, the industrial waste salt to be treated 3, the mixed industrial waste salt 1, and the mixed industrial waste salt 2 were uniformly mixed in a mass ratio of 3:1:4, and the AlCl in the resulting mixture 3 The mass fraction is 2.8%, the discharge TOC is 0.012%, and there is slight coking in the pyrolysis furnace.

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Abstract

The invention belongs to the technical field of waste pyrolysis, and particularly relates to a heat treatment method of industrial waste salt. According to the heat treatment method for the industrial waste salt containing aluminum chloride, the mass fraction of the aluminum chloride in the industrial waste salt is controlled to be smaller than 4%, and the control mode of the mass fraction of the aluminum chloride in the industrial waste salt is that the industrial waste salt containing the aluminum chloride is mixed with other industrial waste salt, and the industrial waste salt containing the aluminum chloride is subjected to two treatment steps including an anaerobic pyrolysis step and an aerobic oxidation step. According to the method, the coking phenomenon in a pyrolyzing furnace can be relieved to a great extent, safe and stable operation of the pyrolyzing process is guaranteed, and the method is low in cost and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of waste pyrolysis, in particular to a heat treatment method for industrial waste salt. Background technique [0002] Industrial waste salt is widely produced in chemical, pharmaceutical and other industries, with complex components and most of them contain organic matter. The prior art mainly uses anaerobic pyrolysis, high-temperature melting, and deep oxidation after dissolving waste salt in water to treat industrial waste salt. Among them, anaerobic pyrolysis technology is one of the most important technologies for industrial waste salt treatment. Its principle is to use the thermal instability of organic matter to thermally decompose organic matter under oxygen-free and high-temperature conditions. [0003] Industrial waste salt is generally subjected to anaerobic pyrolysis at 400-600°C. Chinese patent document CN 109882853 A pointed out that the high-temperature carbonization treatment of industrial w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/00F23G5/027F23G5/50
CPCF23G7/00F23G5/027F23G5/50
Inventor 田汪洋中原康叶嘉涵金雯徐芙清车磊
Owner ZHE JIANG ECO ENVIRONMENTAL TECH CO LTD
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