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Treatment device and method for recycling chlorine-containing waste acid

A processing device and a technology for recycling, which is applied in the field of waste acid treatment and recycling to achieve the effect of avoiding dangerous gypsum slag

Pending Publication Date: 2021-10-22
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is a series of environmental protection problems caused by a large amount of dangerous gypsum slag produced by the conventional lime neutralization process of waste acid and its storage. It provides a treatment device and method for recycling waste acid containing chlorine

Method used

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  • Treatment device and method for recycling chlorine-containing waste acid
  • Treatment device and method for recycling chlorine-containing waste acid
  • Treatment device and method for recycling chlorine-containing waste acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The parameters involved in this embodiment are the parameters obtained by using the device and method of the invention to carry out field tests in a smelting enterprise in Hunan Province.

[0063] Use a metering pump to pump 0.5m 3 Sulfuric acid (98%) and 0.3m 3 Put the hydrogen peroxide (50%) into the corresponding sulfuric acid and hydrogen peroxide metering tank, and press 0.1m from the metering tank 3 The above-mentioned sulfuric acid and hydrogen peroxide are transported to the dechlorination agent reactor (2m) at a flow rate of / min 3 ), turn on the cooling circulating water, turn on the agitator at 150r / min, and react the sulfuric acid and hydrogen peroxide at 25°C for 1 hour to generate the dechlorination agent. The produced dechlorination agent is transported to the dechlorination agent stainless steel storage tank (5m 3 ),spare.

[0064] 25m generated in different time periods 3 The waste acid is transported to the carbon steel waste acid storage tank (30...

Embodiment 2

[0070] The parameters involved in this embodiment are the parameters obtained by using the device and method of the invention in a test in a smelting enterprise in Guangxi Province.

[0071] Use a metering pump to pump 0.5m from the sulfuric acid carbon steel storage tank and the hydrogen peroxide carbon steel 3 Sulfuric acid (70%) 0.4m 3 Hydrogen peroxide (50%) is injected into the sulfuric acid and hydrogen peroxide metering tank, and then press 0.2m from the metering tank 3 The above-mentioned sulfuric acid and hydrogen peroxide are transported to the dechlorinating agent reactor (5m) at the flow rate of / min 3 ), turn on the cooling circulating water, turn on the agitator at 120r / min, and make the sulfuric acid and hydrogen peroxide react at 35°C for 1 hour to generate the dechlorination agent. The produced dechlorination agent is transported to the dechlorination agent stainless steel storage tank (8m 3 ),spare.

[0072] 40m generated in different time periods 3 The ...

Embodiment 3

[0078] The parameters involved in this embodiment are the parameters obtained by using the device and method of the invention to carry out tests in a smelting enterprise in Henan Province.

[0079] Use a metering pump to pump 0.5m 3 Sulfuric acid (98%) and 0.3m 3 Hydrogen peroxide (70%) is injected into sulfuric acid and hydrogen peroxide metering tank, and then press 0.15m from the metering tank 3 The above-mentioned sulfuric acid and hydrogen peroxide are transported to the dechlorination agent reactor (2m) at a flow rate of / min 3 ), turn on the cooling circulating water, turn on the agitator at 150r / min, and react sulfuric acid and hydrogen peroxide at 55°C for 0.5h to generate a dechlorination agent. The produced dechlorination agent is transported to the dechlorination agent stainless steel storage tank (6m 3 ),spare.

[0080] 20m generated in different time periods 3 The waste acid is transported to the carbon steel waste acid storage tank (30m 3 ), start stirring...

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Abstract

The invention relates to a treatment device and method for recycling chlorine-containing waste acid. The treatment device for recycling the chlorine-containing waste acid comprises a sulfuric acid supply device, a hydrogen peroxide supply device, a dechlorinating agent reaction device, a waste acid dechlorination regeneration device and a chlorine gas absorption device. The sulfuric acid supply device and the hydrogen peroxide supply device are respectively connected with the dechlorinating agent reaction device through conveying pipelines, the dechlorinating agent reaction device is connected with the waste acid dechlorination regeneration device through a conveying pipeline, and the waste acid dechlorination regeneration device is connected with the chlorine gas absorption device through a conveying pipeline. When the device is used for treating the chlorine-containing waste acid, gypsum-free treatment of the waste acid is realized, a series of problems caused by a large amount of dangerous gypsum residues generated when the waste acid is treated by a conventional neutralization method are solved, secondary pollution is thoroughly eliminated, waste is turned into wealth, a high-purity sodium hypochlorite product is obtained, the treated acid liquor is completely recycled, and the device and method have huge environmental, social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of waste acid treatment and resource recovery, in particular to a treatment device and method for resource recovery of chlorine-containing waste acid. Background technique [0002] In the metallurgical industry, a large amount of chlorine-containing waste acid is produced in the flue gas washing acid production process and the ion exchange resin dechlorination process, with a large amount and extremely high acid concentration. For the treatment of this type of waste acid, more than 95% of enterprises currently directly use lime milk to neutralize the waste acid into gypsum slag for storage. In recent years, the drawbacks of this approach have gradually emerged, forcing the industry to seek new approaches. The disadvantages are mainly reflected in: (1) The moisture content of gypsum slag is high, the amount of production is huge, and it has no recycling value. If this treatment method continues to be used, t...

Claims

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Application Information

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IPC IPC(8): C01B11/06C01B17/74C01B17/90C01B21/38C01B25/18
CPCC01B11/062C01B17/901C01B17/74C01B25/18C01B21/38
Inventor 彭先佳胡星云孔令昊
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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