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Method for refining and resource utilization of byproduct salt

A by-product and recycling technology, applied in chemical instruments and methods, chemical/physical processes, solid waste removal, etc., can solve the problems of resource utilization of bonding equipment, uneven heating, etc., to increase heat energy utilization, heating The effect of uniformity and shortening of heating time

Inactive Publication Date: 2016-12-14
NANJING GW ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems existing in the prior art, the patent of the present invention discloses a microwave cracking technology of by-product salt, which can solve the problems of uneven heating, bonding equipment and resource utilization

Method used

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  • Method for refining and resource utilization of byproduct salt
  • Method for refining and resource utilization of byproduct salt

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The process flow of the present invention is shown in Figure 1. The by-product salt used in this experiment comes from a pesticide chemical company. It is mainly the by-product salt (primary filter salt) produced in the production process of insecticidal sheets, and the main component is sodium chloride salt. The water content of the sample is about 12%, and the concentration of organic matter is relatively high. A certain amount of by-product salt was weighed, placed in a microwave cracking furnace, the temperature was set at 400°C, and the cracking time was 4 hours. The treatment effect is shown in Table 1.

[0036] Table 1 Experimental processing and analysis data

[0037]

[0038] Remarks: The data is measured by dissolving 10g dry weight by-product in 100ml pure water.

[0039] It can be seen from the data in Table 1 that after microwave cracking, the salt organic matter in the by-products has been lower than the detection blank, indicating that the organic mat...

Embodiment 2

[0051] The by-product salt used in this experiment comes from a pesticide chemical company, which is mainly the by-product salt (primary filter salt) produced in the production process of insecticidal sheets, and the main component is sodium chloride salt. The water content of the sample is about 12%, and the concentration of organic matter is relatively high. Weigh a certain quality of by-product salt, place it in a microwave cracking furnace, set the temperature at 600°C, and crack it for 2 hours. Dissolve the qualified salt in a certain volume of solution. The salt concentration in the solution is 200g / L. A good salt solution for removal of impurities.

[0052] (1) clarification and filtration. Dissolved salt contains a large amount of insoluble sediment and carbon compounds, which need to be removed.

[0053] (2) Remove sulfate ions. Add barium salt to the solution, when sulfate ion and barium ion form barium sulfate precipitation, thereby remove sulfate ion by the form...

Embodiment 3

[0058] The by-product salt used in this experiment comes from a pesticide chemical company, which is mainly the by-product salt (primary filter salt) produced in the production process of insecticidal sheets, and the main component is sodium chloride salt. The water content of the sample is about 12%, and the concentration of organic matter is relatively high. Weigh a certain quality of by-product salt, place it in a microwave cracking furnace, set the temperature at 200°C, and crack it for 6 hours. Dissolve the qualified salt in a certain volume of solution. The salt concentration in the solution is 350g / L. A good salt solution for removal of impurities.

[0059] (1) clarification and filtration. Dissolved salt contains a large amount of insoluble sediment and carbon compounds, which need to be removed.

[0060] (2) Remove sulfate ions. Add barium salt to the solution, when sulfate ion and barium ion form barium sulfate precipitation, thereby remove sulfate ion by the form...

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Abstract

The invention provides a method for refining and resource utilization of byproduct salt. The method comprises the following steps: (1), byproduct salt of certain mass is placed into a microwave cracking furnace; (2), a waste gas emission opening is arranged on the microwave cracking furnace; (3), waste gas emitted out of the waste gas emission opening enters a heat exchanger; (4), the waste gas passing through the heat exchanger is connected with a waste gas treatment device; (5), the byproduct salt subjected to treatment of the step (1) is tested; (6), the byproduct salt which is tested to be qualified in the step (5) is dissolved in pure water and is purified; (7), the purified salt is subjected to electrolysis with an ion-exchange film; and (8), after the purified salt is subjected to the electrolysis with the ion-exchange film, H2, Cl2, and NaOH can be obtained. The method is high in resource utilization degree and simple in technological process; identification of dangerous waste is not needed; waste salt can be subjected to resource utilization directly; most test and analysis cost can be omitted; automatic production is realized; and operation is simple.

Description

technical field [0001] The invention is aimed at the refining and resource utilization technology of by-product salt produced in the production process of pesticide, medicine and other industries, forms a new resource for utilization, and belongs to the field of environmental protection. Background technique [0002] At present, my country's coal chemical industry, pesticides, dyes and other industries produce a large amount of polluted salt, with an annual output of millions of tons, and there is a lack of suitable treatment methods. These waste salts contain a large amount of toxic and harmful organic substances, and have a pungent smell, and are generally identified as hazardous waste by the local environmental protection department. At present, the relevant national departments are including the by-product salt produced by the pesticide industry in the list of hazardous waste, and it does not need to be identified as hazardous solid waste. Because there is no clear stan...

Claims

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Application Information

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IPC IPC(8): B09B3/00B01J6/00
CPCB01J6/008B09B3/40
Inventor 韩正昌马军军韩峰朱家明高亚娟张寅丞朱伯淞何建龙季军吴传宝张寿兵
Owner NANJING GW ENVIRONMENT ENG
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