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System and method for recycling ferrous ion-containing acidic waste water resources

A technology for acid wastewater and resource recovery, applied in the field of environmental engineering, can solve the problems of high cost, inability to realize the recovery and utilization of acid wastewater resources, sludge reduction and stabilization, secondary pollution, etc. Precipitation stabilization and immobilization disposal, simple operation effect

Pending Publication Date: 2019-09-06
安徽瑞迪工程科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a resource recovery system and method for acidic wastewater containing ferrous ions, so as to solve the problem of high cost, easy to cause secondary pollution, and inability to achieve acidic wastewater treatment methods in the prior art to produce heavy metal sludge. Recycling of waste water resources, sludge reduction and stabilization issues

Method used

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  • System and method for recycling ferrous ion-containing acidic waste water resources
  • System and method for recycling ferrous ion-containing acidic waste water resources

Examples

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Effect test

Embodiment 1

[0046] A recovery method of a resource recovery system for acid wastewater containing ferrous ions includes the following specific steps:

[0047] S1. Acidic wastewater treatment: 1t of acidic wastewater containing ferrous ions (produced by the galvanizing process) is added to the vulcanization reactor 21 through the first feeding port 212 on the vulcanization reactor 21, and stirred by the stirring blade in the vulcanization reactor 21 , Make the acidic wastewater mix uniformly; take a sample to determine the molar concentration of iron is 0.4mol / L, and the molar concentration of other heavy metal zinc is 0.1mol / L;

[0048] S2. Vulcanization reaction: Under sealed conditions, 62.43kg of sodium sulfide powder is added to the vulcanization reactor 21 through the first dosing device 211 on the vulcanization reactor. The molar ratio of heavy metals iron, zinc and sodium sulfide is 1: 2; Stirring with the stirring blade in the vulcanization reactor 21 to cause the ionic iron and zinc t...

Embodiment 2

[0057] A recovery method of a resource recovery system for acid wastewater containing ferrous ions includes the following specific steps:

[0058] S1. Acidic wastewater treatment: 1t of acidic wastewater containing ferrous ions (produced by the galvanizing process) is added to the vulcanization reactor 21 through the first feeding port 212 on the vulcanization reactor 21, and stirred by the stirring blade in the vulcanization reactor 21 , To make the acidic wastewater mixed uniformly; the molar concentration of iron is 0.4mol / L and the molar concentration of other heavy metal zinc is 0.15mol / L;

[0059] S2. Vulcanization reaction: Under sealed conditions, 128.77kg of sodium sulfide powder is added to the vulcanization reactor 21 through the first dosing device 211 on the vulcanization reactor. The molar ratio of heavy metal iron, zinc and sodium sulfide is 1:3 ; Use the stirring blade in the vulcanization reactor 21 to stir to cause the ionic iron and zinc to undergo a vulcanizatio...

Embodiment 3

[0068] A recovery method of a resource recovery system for acid wastewater containing ferrous ions includes the following specific steps:

[0069] S1. Acidic wastewater treatment: 1t of acidic wastewater containing ferrous ions (produced by the galvanizing process) is added to the vulcanization reactor 21 through the first feeding port 212 on the vulcanization reactor 21, and stirred by the stirring blade in the vulcanization reactor 21 , To make the acidic wastewater mixed uniformly; the molar concentration of iron is 0.43mol / L, and the molar concentration of other heavy metal zinc is 0.12mol / L;

[0070] S2. Vulcanization reaction: Under sealed conditions, 64.38kg of sodium sulfide powder is added to the vulcanization reactor 21 through the first dosing device 211 on the vulcanization reactor. The molar ratio of heavy metals iron, zinc and sodium sulfide is 1: 1.5; Stirring with the stirring blade in the vulcanization reactor 21 to cause the ionic iron and zinc to undergo a vulcan...

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Abstract

The invention provides a system and method for recycling ferrous ion-containing acidic waste water resources, belonging to the field of environmental engineering. According to the invention, picklingwaste water in the metallurgical industry is treated, and a ferrous chloride recovery system comprises a vulcanization reaction device, a solid waste reduction device, a ferric phosphate preparation device, a waste gas absorption device and the like. The invention provides a complete set of solving method for treating the pickling waste water in metallurgical industry, the method reduces treatmentprocess flow equipment, simplifies operation flow, can effectively stabilize other heavy metal impurity ions and realizes the stabilization of hazardous wastes; ferrous chloride ions in the picklingwaste water are recycled to prepare ferric phosphate. In addition, acid leaching and other methods are used to minimize heavy metal sulfide sludge.

Description

Technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a process system for recycling ferrous ion resources in acid wastewater produced in modern industry and an application method for its resource-based products. Background technique [0002] Since the second industrial revolution, the social economy has developed significantly, and the construction of economic society is increasingly inseparable from the support of steel. Whether stainless steel or other alloy materials are made into finished products, there is a process called pickling; the method of using acid solution to remove oxide scale and rust on the surface of steel is a method of cleaning the metal surface. In addition, the electroplating process will also produce acidic waste liquid, mainly from the strong acidity of the electroplating bath, and the heavy metal ions are covered on the surface of the iron metal under the action of the electric fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F11/00C02F11/122B01D53/52B01D53/78C01B25/37C02F101/20
CPCC02F1/62C02F1/64C02F1/001C02F11/00C02F11/122B01D53/52B01D53/78C01B25/375C02F2101/20C02F2101/203C02F2303/06
Inventor 黄昭杰鄢俊陈琼陆正明杨桃红
Owner 安徽瑞迪工程科技有限公司
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