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A resource utilization method of organic matter polluted salt slag

A technology of organic matter and recycling, applied in combustion methods, solid waste removal, alkali metal halide purification, etc., can solve problems such as bed coking, clogging, and secondary pollutant discharge

Active Publication Date: 2020-10-23
湖南中森环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are three key technical obstacles in the traditional high-temperature heat treatment technology: (1) During the incineration process, inorganic salts such as potassium salt and sodium salt will melt and be taken out of the furnace by the flue gas in the form of droplets and enter the waste heat recovery device, while The waste heat recovery device usually adopts a pure convection pipe heating surface, and the flue gas and micro-salt droplets wash away the wall surface of the relatively low temperature heating surface together, which is likely to cause salt accumulation and blockage of the heating surface of the waste heat recovery device of the incinerator; (2) Organic The waste liquid usually uses alkali to neutralize the acid waste liquid, and most alkali metal salts and alkaline earth metal salts have low melting points, and they will mix with SiO in the bed material and coal ash during the combustion process 2 A reaction occurs, and a low-melting eutectic is formed in the bed, resulting in coking of the bed; (3) Tail gas will be generated during the treatment process, and there is a problem of secondary pollutant discharge

Method used

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  • A resource utilization method of organic matter polluted salt slag
  • A resource utilization method of organic matter polluted salt slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The resource utilization method of organic matter polluted salt slag comprises the following steps:

[0030] S1. Waste residue dissolution: Dissolve salt residue in water at a solid-to-liquid ratio of 3:10; a small amount of insoluble sludge will be produced during the dissolution process, and the sludge that sinks to the bottom of the dissolution tank needs to be removed regularly and sent to a volatilization kiln for solid waste treatment .

[0031] S2. Micro-nano-bubble air flotation process: use micro-nano-bubble generating device to air-float the waste residue liquid, then dissolve ozone into the sewage through the micro-nano-bubble generating device, and pass the prepared micro-nano-bubble water into In the air flotation tank, the micro-nano bubbles will adhere to the impurity flocs, causing the overall density of the flocs to be lower than that of water to rise and become scum. The scum produced in this step is used as an auxiliary raw material for the incinerati...

Embodiment 2

[0037] The resource utilization method of organic matter polluted salt slag comprises the following steps:

[0038] S1. Waste residue dissolution: Dissolve salt residue in water at a solid-to-liquid ratio of 3:10; a small amount of insoluble sludge will be produced during the dissolution process, and the sludge that sinks to the bottom of the dissolution tank needs to be removed regularly and sent to a volatilization kiln for solid waste treatment .

[0039] S2. Micro-nano-bubble air flotation process: use micro-nano-bubble generating device to air-float the waste residue liquid, then dissolve ozone into the sewage through the micro-bubble generating device, and pass the prepared micro-bubble water into the air under a high pressure of 0.8MPa In the floating tank, the micro-nano bubbles will adhere to the impurity flocs, causing the overall density of the flocs to be lower than that of water to rise and become scum. The scum generated in this step is used as an auxiliary raw m...

Embodiment 3

[0045] The resource utilization method of organic matter polluted salt slag comprises the following steps:

[0046] S1. Waste residue dissolution: Dissolve salt residue in water at a solid-to-liquid ratio of 3:10; a small amount of insoluble sludge will be produced during the dissolution process, and the sludge that sinks to the bottom of the dissolution tank needs to be removed regularly and sent to a volatilization kiln for solid waste treatment .

[0047] S2. Micro-nano-bubble air flotation process: use micro-nano-bubble generator for air flotation treatment, then dissolve ozone into the sewage through the micro-bubble generator, and pass the prepared micro-bubble water into the air flotation tank under a high pressure of 0.6MPa. The micro-nano bubbles will adhere to the impurity flocs, causing the overall density of the flocs to be lower than that of water to rise and become scum. The scum generated in this step is used as auxiliary raw material for incineration kiln for i...

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Abstract

The invention provides a resource utilization method for organic matter polluted salt slag and belongs to the technical field of salt slag treatment. The resource utilization method comprises the following steps: dissolving salt slag in water; treating salt-containing wastewater under joint action of ozone and an oxidizing agent by means of a micro-nano ozone technology; and carrying out evaporative crystallization on the treated wastewater to obtain industrial salt. Based on an ozonation technology, the salt slag is dissolved first, the salt-containing wastewater is then treated, and evaporative crystallization is carried out on the treated wastewater to generate secondary industrial salt. The method is high in salt yield and good in treatment effect, and can achieve resource utilizationof the salt slag. The treated salt can reach a secondary industrial salt standard, and the resource utilization method has the characteristics of being short in treatment time, low in energy consumption and free of secondary pollution.

Description

technical field [0001] The invention relates to the technical field of salt slag treatment, in particular to a resource utilization method for organic matter polluted salt slag. Background technique [0002] A large amount of sodium chloride will be produced in the process of pesticide production. Since it contains a large amount of organic residues and catalysts, this salt residue is a hazardous waste. At present, the salt slag treatment technologies mainly include thermal decomposition, microwave cracking, and Fenton advanced oxidation. Although thermal decomposition technology and microwave cracking technology can guarantee a certain salt yield, they consume high energy and have problems in tail gas treatment; Fenton advanced oxidation technology consumes less energy, but ferrous sulfate will be added during the treatment process, and ferrous sulfate will react The ferric iron produced in the end will make the salt solution brownish red, making it difficult to meet the s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00F23G5/00C01D3/14
CPCB09B3/00C01D3/14F23G5/00
Inventor 康阳王奕森李书焱邓湘林
Owner 湖南中森环境科技有限公司