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Treatment process of industrial waste salt

A technology for treating process and industrial waste salt, applied in solid waste removal, chemical instruments and methods, transportation and packaging, etc., can solve the problem of low treatment efficiency, achieve high treatment efficiency, good prospects for industrialization promotion, and simple process Effect

Inactive Publication Date: 2019-11-05
北京诺芯环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing high-temperature pyrolysis treatment process mainly uses high-temperature hot air to directly or indirectly exchange heat with waste salt, so that the organic matter in waste salt can be cracked at high temperature. The equipment used mainly includes rotary heating furnace, multi-layer disc cracking Furnace, etc., low processing efficiency

Method used

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  • Treatment process of industrial waste salt

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The industrial waste sodium chloride (hereinafter referred to as raw material) provided by the pesticide factory has a yellowish-brown color and a particle size of 2mm. The main components include: about 70wt% sodium chloride, and the rest are pesticide residue organic matter, inorganic matter and water.

[0048] Put 1000g of raw material into a microwave oven to dry, set the microwave power to 1500W, heat the raw material to 120°C, keep it for 10 minutes, turn off the microwave power supply, and take out the raw material when the temperature of the raw material drops to room temperature, and the raw material turns grayish yellow. At this time, the weight of the raw material is 925g, weight loss of 7.5wt% through drying raw material.

[0049] The dried raw material is crushed to less than 0.1 mm, and then added to a microwave oven for cracking. Set the power of the microwave power supply to 1500W, heat to 480°C, and keep it warm for 30 minutes. During the pyrolysis proc...

Embodiment 2

[0052] The industrial waste sodium chloride (hereinafter referred to as raw material) that pharmaceutical factory provides, color is yellow, and particle size is 1.5mm, main component comprises: sodium chloride about 85wt%, all the other are residual organic matter, inorganic matter and water.

[0053] Put 1000g of raw material into a microwave oven to dry, set the microwave power to 1500W, heat the raw material to 160°C, keep it for 20 minutes, turn off the microwave power supply, and take out the raw material when the temperature of the raw material drops to room temperature, and the raw material turns grayish yellow. At this time, the weight of the raw material is 862g, a weight loss of 13.8wt% after drying the raw material.

[0054] The dried raw material is crushed to less than 0.1 mm, and then added to a microwave oven for cracking. Set the power of the microwave power supply to 1500W, heat to 450°C, and keep it warm for 20 minutes. During the pyrolysis process, the raw ...

Embodiment 3

[0057] Industrial waste sodium chloride (hereinafter referred to as raw material) provided by a pesticide factory has a brownish yellow color and a particle size of 0.5mm. The main components include: about 85wt% sodium chloride, and the rest are residual organic matter, inorganic matter, water and other impurities .

[0058] Put 1000g of raw material into a microwave oven to dry, set the microwave power to 1500W, heat the raw material to 200°C, keep it for 10 minutes, turn off the microwave power supply, and take out the raw material when the temperature of the raw material drops to room temperature, and the raw material turns light yellow. At this time, the weight of the raw material is 816g, weight loss of 18.4wt% through drying raw material.

[0059] The dried raw material is crushed to less than 0.1 mm, and then added to a microwave oven for cracking. Set the power of the microwave power supply to 1500W, heat to 470°C, and keep it warm for 30 minutes. During the pyrolysi...

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Abstract

The invention belongs to the field of environmental protection, and particularly relates to a treatment process of industrial waste salt. The treatment process of the industrial waste salt comprises the following steps of (a), carrying out microwave drying on the industrial waste salt under a closed condition to obtain dry waste salt; (b) crushing the dry waste salt to obtain waste salt powder; (c) carrying out microwave pyrolysis on the waste salt powder under an aerobic condition to obtain pyrolyzed salt; and (d), sequentially dissolving, filtering and crystallizing the pyrolyzed salt to obtain regenerated industrial salt. According to the treatment process of the industrial waste salt, the industrial waste salt is subjected to microwave drying, crushing, microwave pyrolysis and purification treatment to obtain the high-purity regenerated industrial salt. The treatment process has the advantages of simple process, high treatment efficiency, suitability for large-scale treatment of the industrial waste salt and good industrial popularization prospects.

Description

technical field [0001] The invention belongs to the field of environmental protection, in particular to a process for treating industrial waste salt. Background technique [0002] Industrial waste salt refers to various waste residues, dust and other wastes discharged during industrial production. In the industrial field, many enterprises produce waste salt in the production process. For example, in the organic synthesis industry, fine chemical industry, pesticide industry and many other industries, it is often necessary to purify the synthetic product or intermediate product through alkalization and acidification in the product purification stage, and a large amount of salty wastewater is generated. It is quite toxic and difficult to handle, so the storage of these waste salt solutions has become an important issue in the industry. At present, in order to reduce the amount of waste liquid, many enterprises use the method of heating and evaporating waste salt solutions to w...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00B09B2101/02B09B3/40
Inventor 刘俊祥孔庆锋刘强任丽梅汪万峰荀方飞刘千魏世东高岷民姜勇
Owner 北京诺芯环境科技有限公司
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