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Microwave pyrolysis method for by-product salt

A by-product, microwave technology, used in chemical instruments and methods, pyrolysis reaction, solid waste removal, etc., can solve problems such as bonding equipment and uneven heating, and achieve high heating efficiency, uniform heating, and shortened heating time. Effect

Inactive Publication Date: 2016-11-09
NANJING GW ENVIRONMENT ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the prior art, the patent of the present invention discloses a microwave cracking method of by-product salt, which can solve the problems of uneven heating and sticky equipment

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 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. A certain quality of by-product salt was weighed and placed in a microwave cracking furnace with a set temperature of 400 °C and a cracking time of 4 hours. The treatment effect is shown in Table 1.

[0028]

[0029] Remarks: The data is measured by dissolving 10g dry weight by-product in 100ml pure water.

[0030] 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 matter has been completely decomposed and the treatment effect is excellent.

Embodiment 2

[0032] The by-product salt used in this experiment comes from a pesticide chemical company, which is mainly the by-product salt (secondary filter salt) produced in the production process of insecticidal sheets, and the main component is sodium chloride salt. The moisture content of the sample is about 18%, and the concentration of organic matter is relatively high. A certain quality of by-product salt was weighed, placed in a microwave cracking furnace, the set temperature was 600°C, and the cracking time was 4h. The treatment effect is shown in Table 2.

[0033]

[0034] Remarks: The data is measured by dissolving 10g dry weight by-product in 100ml pure water.

[0035] It can be seen from the data in Table 2 that after microwave cracking, the salt organic matter in the by-products has been lower than the detection blank, indicating that the organic matter has been completely decomposed and the treatment effect is excellent.

Embodiment 3

[0037] 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. Take by-product salt of a certain quality, place in microwave cracking furnace, setting temperature is 200 ℃, cracking time is 6h.

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Abstract

The invention provides a microwave pyrolysis method for by-product salt. The microwave pyrolysis method for the by-product salt is characterized by mainly including the following steps that (1), the by-product salt of a certain mass is placed in a microwave pyrolysis furnace, the temperature in the microwave pyrolysis furnace is controlled within the range of 200-700 DEG C, and the pyrolysis time is 1-6 h; (2), in the heating process, waste gas can be generated, and a waste gas discharge port is formed in the microwave pyrolysis furnace; (3), the waste gas discharged out of the waste gas discharge port in the step (2) enters a heat exchanger, and heat which is taken away is reused in the type of hot air or liquid; (4), the waste gas passing through the heat exchanger in the step (3) is conveyed to a waste gas treatment device; and (5), the by-product salt after being treated in the step (1) is detected, made to reach a common waste standard and treated as common solid waste. According to the microwave pyrolysis method for the by-product salt, microwave heating is adopted, heating is uniform, the occupied area is small, environment high temperature is avoided, the heat energy utilizing rate is increased, waste of energy is reduced, and therefore the treatment cost of the by-product salt is reduced.

Description

technical field [0001] The invention is aimed at refining the by-product salt produced in the production process of pesticide, medicine and other industries, so as to make it meet the requirements of general solid waste or resource 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B01J6/00
CPCB01J6/008B09B3/40
Inventor 韩正昌马军军申屠灵女谢文玉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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