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Method and system for treating chemical abraum salt containing organic matter through self-propagating pyrolysis method

A self-propagating, organic technology, used in combustion methods, incinerators, lighting and heating equipment, etc., can solve the problems of finished salt TOC can not meet the standard, difficult to expose, difficult to remove, etc., to achieve stable and controllable pyrolysis temperature, temperature distribution Uniform, load-reducing effect

Pending Publication Date: 2019-03-26
CHONGQING ANGRUIYUE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to domestic investigations and analysis in relevant industries, thermal equipment such as rotary kilns and fluidized fluidized furnaces are currently used for decomposition treatment, but it is difficult to solve industrial problems such as ringing and agglomeration of dry salt at high temperatures during operation, so it is difficult to realize industrialization
[0007] Among the above three methods, the high-temperature treatment method is the most simple and easy to implement, but the key technical difficulties still exist: how to prevent the agglomeration of waste salt in a high-temperature environment, the agglomeration in a high-temperature environment, and the agglomeration contained in the agglomeration. Buried organic matter makes it difficult to be exposed to high temperature and difficult to remove, so that the TOC in the finished salt cannot meet the standard. At the same time, the processed finished salt also contains a large amount of molten salt lumps, and the finished salt cannot meet the requirements of industrial salt. Requirements, not to mention the requirements of salt for ionic membrane caustic soda

Method used

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  • Method and system for treating chemical abraum salt containing organic matter through self-propagating pyrolysis method
  • Method and system for treating chemical abraum salt containing organic matter through self-propagating pyrolysis method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Embodiment 1 processes chlor-alkali industry by-product dry salt

[0049] Before treatment, the particle size of more than 5% of the dry salt is greater than 30mm, and the TOC of the by-product dry salt in the chlor-alkali industry is 750ppm.

[0050] The method for treating waste chemical industry salt containing organic matter by self-propagating pyrolysis comprises the following steps:

[0051] (1) Pretreatment

[0052] The waste salt with a particle size greater than or equal to 30mm is broken into granular salt, and the waste salt with a particle size less than 30mm is directly distributed.

[0053] (2) Pyrolysis treatment:

[0054] Granular salt is used as the base material, and the powdered salt is arranged on the pyrolysis device. The thickness of the base material is 2 mm, and the thickness of the material layer is 350 mm;

[0055] After the fabric is ignited and burned, the burning flame does not directly contact the material. The negative pressure ventilat...

Embodiment 2

[0059] Embodiment 2 processes chlor-alkali industry by-product dry salt

[0060] Before treatment, the particle size of more than 95% of the dry salt is less than 2mm, and the TOC of the by-product dry salt in the chlor-alkali industry is 1200ppm.

[0061] The method for treating waste chemical industry salt containing organic matter by self-propagating pyrolysis comprises the following steps:

[0062] (1) pretreatment,

[0063] The by-product dry salt is formed into balls with a particle size of 6-10 mm.

[0064] (2) Pyrolysis treatment:

[0065] Lay the pellets directly on the pyrolysis device, the thickness of the material layer is 500mm;

[0066] After the fabric is ignited and burned, the burning flame does not directly contact the material. The negative pressure ventilation method is adopted, and the negative pressure is 450-2500Pa. The high-temperature smoke generated by the continuous combustion of the fuel is transmitted from the surface of the material layer to th...

Embodiment 3

[0070] Embodiment 3 processes chlor-alkali industry by-product dry salt

[0071] Before treatment, the particle size of 95% of the dry salt is between 2 and 30mm, and the TOC of the by-product dry salt in the chlor-alkali industry is 2561ppm.

[0072] The method for treating waste chemical industry salt containing organic matter by self-propagating pyrolysis comprises the following steps:

[0073] (1) Pyrolysis treatment:

[0074] Lay the by-product dry salt directly on the pyrolysis device, with a material layer thickness of 400mm;

[0075] After the fabric is ignited and burned, the burning flame does not directly contact the material. It adopts the negative pressure ventilation method, and the negative pressure is 300-2000Pa. The high-temperature smoke generated by the continuous combustion of the fuel is transmitted from the surface of the material layer to the entire material layer by self-propagation, and the control The temperature of the high-temperature flue gas is ...

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Abstract

The invention relates to the field of solid waste treatment, in particular to a method and system for treating chemical abraum salt containing organic matter through a self-propagating pyrolysis method. The method comprises the following steps that pretreatment is carried out in a pelletizing or washing or treating-free mode according to particle size distribution of chemical abraum salt; 2, materials are distributed; 3, pyrolysis treatment is carried out, and particularly organic matter in a material layer is pyrolyzed into a gas compound through a self-propagating pyrolysis method; 4, the pyrolyzed material layer is cooled to obtain finished salt; and 5, flue gas treatment is carried out, and particularly flue gas containing the gas compound is introduced into a flue gas purifying treatment system for purifying treatment. The finished salt obtained from the abraum salt treated through the method has no melting and agglomeration phenomenon, the TOC content is as low as 10.00ppm, and the requirements of ionic membrane caustic soda can be met. The invention further provides a treating system adopting the method, a self-propagating pyrolysis device in the system can sufficiently utilize heat, can stably control pyrolysis temperature and is suitable for treatment various kinds of abraum salt.

Description

technical field [0001] The invention relates to the field of solid waste treatment, especially high-salt and organic-containing waste produced in the chemical industry, and specifically relates to a method and system for treating waste chemical industry salt containing organic matter by adopting a self-propagating pyrolysis method. Background technique [0002] Chemical waste salt contains various toxic substances, among which organic matter is the most harmful. Facing increasingly stringent environmental protection policies, the treatment and disposal of waste salt has become an issue of increasing concern. Industrial salt is not only an important chemical raw material, but also a national strategic resource. Recycling chemical waste salt as industrial raw material salt can not only eliminate its pollution to the environment, but also make full use of salt resources to realize by-product recycling and circular economy. [0003] At present, there are mainly the following tre...

Claims

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Application Information

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IPC IPC(8): F23G5/027F23G5/033F23G5/44F23J15/02
CPCF23G5/027F23G5/033F23G5/44F23J15/02F23J15/022
Inventor 李秉正李一吴汕甘奕张军
Owner CHONGQING ANGRUIYUE SCI & TECH
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