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Method for high-temperature melting treatment of chemical waste salt

A high-temperature melting and molten salt technology, which is applied in the purification of alkali metal chlorides, alkali metal halides, crucible furnaces, etc., can solve the problems of incomplete treatment of organic matter and the inability to obtain industrial salt that meets the national standard, and achieves enhanced removal and accelerated reaction. Reasonable effect of speed and process route

Active Publication Date: 2021-04-02
山东智永化工产业技术研究院有限公司
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AI Technical Summary

Problems solved by technology

[0005] In order to make up for the incomplete treatment of organic matter in chemical waste salt or the inability to meet the national standard industrial salt after treatment, the present invention provides a high-temperature melting oxidation method for treating chemical waste The method of salt, to solve the problem in the above-mentioned background technology

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  • Method for high-temperature melting treatment of chemical waste salt
  • Method for high-temperature melting treatment of chemical waste salt
  • Method for high-temperature melting treatment of chemical waste salt

Examples

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Embodiment 1

[0039] Embodiment 1 A kind of method of high-temperature fusion oxidation process chemical industry waste salt

[0040]A method for treating chemical waste salt by high-temperature fusion oxidation method of the present invention comprises the following steps:

[0041] (1) The basic parameters of pesticide waste salt are: TOC content 13067mg / kg, moisture content 6%, water insoluble content 0.23%, the main pollutants are pesticides, containing tar substances.

[0042] 2) Take 709g of chemical waste salt and add it to the high-temperature melting oxidation furnace. The high-temperature melting oxidation furnace in this embodiment takes a horizontal flame furnace as an example, as figure 1 As shown, it includes a melting tank cavity 1, and burners for heating the inner cavity are installed on both sides of the melting tank cavity 1 alternately, and a regenerator 3 is also connected to the burner. The melting tank cavity 1 is provided with a discharge channel 8 whose height is eq...

Embodiment 2

[0048] Embodiment 2 A kind of method of high-temperature melting oxidation process chemical industry waste salt

[0049] A method for treating chemical waste salt by high-temperature fusion oxidation method of the present invention comprises the following steps:

[0050] (1) The basic parameters of pesticide waste salt are: TOC content 13067mg / kg, moisture content 6%, water insoluble content 0.23%, the main pollutants are pesticides, containing tar substances.

[0051] 2) Take 763g of chemical waste salt and 3.7g of sodium chlorosulfonate and mix them evenly, then put them into a high-temperature melting oxidation furnace, and control the temperature of the system at 900°C. When the system temperature reached 900°C, the timer was started, and the experiments verified the data of staying for 0.5h, 1h, and 3h respectively. After reaching the set dwell time, a sample is taken for analysis.

[0052] Described high-temperature melting and oxidizing furnace takes horizontal flame ...

Embodiment 3

[0057] Example 3 A method for treating waste chemical industry salt by high temperature fusion oxidation

[0058] A method for treating chemical waste salt by high-temperature fusion oxidation method of the present invention comprises the following steps:

[0059] (1) The basic parameters of pesticide waste salt are: TOC content 13067mg / kg, moisture content 6%, water insoluble content 0.23%, the main pollutants are pesticides, containing tar substances.

[0060] 2) Take 693g of chemical waste salt and 4.2g of sodium bicarbonate and mix them evenly, then put them into the high-temperature melting oxidation furnace, and control the temperature of the system at 900°C. When the system temperature reached 900°C, the timer was started, and the experiments verified the data of staying for 0.5h, 1h, and 3h respectively. After reaching the set dwell time, a sample is taken for analysis.

[0061] Described high-temperature melting and oxidizing furnace takes horizontal flame kiln as e...

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Abstract

The invention provides a method for high-temperature melting oxidation treatment of chemical waste salt. The method comprises the steps of melting and reinforced oxidation of molten salt. In the stepof melting, chemical waste salt is added into a high-temperature melting oxidation furnace to be subjected to melting treatment, and the melting temperature is 800-1100 DEG C, preferably 850-1100 DEGC. In the step of reinforced oxidation of the molten salt, the molten salt is contacted with oxidizing substances or substances such as sodium bicarbonate capable of generating gas in a high-temperature state, and the retention time is 1-40 hours, preferably 2-30 hours; and the oxidizing substances are oxygen-containing gas or sodium chlorate, sodium chlorosulfonate and sodium hypochlorite. The method is reasonable in process route, contact between organic matter and the oxidizing substances is reinforced through a mass transfer reinforcing means, chemical waste salt is converted into raw materials used by chlor-alkali enterprises, and closed-loop circulation is achieved. Meanwhile, the reaction rate can be increased, and the substances cannot be carbonized to generate black substances. The method can also be used for treating waste salt generated by high-salt wastewater in other industries such as pesticides and petrifaction.

Description

technical field [0001] The invention relates to a method for treating waste chemical salt, in particular to a method for treating waste chemical salt by high-temperature melting oxidation, which can be used as a resource for chlor-alkali after treatment. Background technique [0002] The amount of chemical waste salt produced is huge, but the disposal rate of it in various industries is currently low. Previously, chemical waste salt could be disposed of by landfill, but the hazardous waste landfill pollution control standard GB18598-2019 points out that flexible landfill requires water-soluble The total amount of permanent salt is less than 10%, so the direct flexible landfill is also subject to policy restrictions, and the choice of rigid landfill will result in higher landfill costs. Moreover, salt resources are important national strategic resources, so it is necessary to develop and design a method for recycling chemical waste salt. [0003] At present, there are severa...

Claims

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Application Information

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IPC IPC(8): C01D3/04C01D3/20F27B14/14F27B14/16F27B14/18
CPCC01D3/04C01D3/20F27B14/14F27B14/0806F27B2014/0818C01P2006/80C01P2006/82
Inventor 侯永生李盼盼朱素娟马华青吴国军徐淑强邹敏丁振洋柳浩张立滨侯龙张建波马常鑫孙炳红
Owner 山东智永化工产业技术研究院有限公司
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