Chemical waste salt separation and recovery system and method

A recovery system and salt separation technology, applied in chemical instruments and methods, solid waste removal, alkali metal halide purification, etc. Effect

Pending Publication Date: 2022-07-29
安徽普朗膜技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method cannot meet the requirements of zero emissions. With the increase of waste salt production year by year, the safe treatment and reuse of chemical waste salt is becoming more and more important. Realizing the safe recovery and resource utilization of chemical waste salt has become an important task in the current chemical industry. Work

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  • Chemical waste salt separation and recovery system and method

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Embodiment Construction

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it is to be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around", etc. Indicates the orientation or positional relationship, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orient...

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Abstract

The invention discloses a chemical waste salt separation and recovery system, and belongs to the field of industrial waste salt separation and recovery. The process comprises a sodium chloride waste salt calcining system, a sodium chloride tubular membrane system, a sodium chloride nanofiltration system, a sodium chloride evaporation system, a sodium sulfate waste salt calcining system, a sodium sulfate tubular membrane system, an ion exchange resin system, a sodium sulfate primary crystallization system and a sodium sulfate secondary crystallization system. The system comprises a sodium sulfate mother liquor tubular membrane system, a sodium sulfate nanofiltration system, a sodium sulfate ultrafiltration system, a waste gas treatment system and a carnallite drying system. Different types of industrial waste salt can be separated and recycled, resource utilization of the waste salt mainly containing sodium chloride and the waste salt mainly containing sodium sulfate is achieved, the cost of the hazardous waste treatment industry is reduced, the environmental protection problem is solved, and meanwhile certain economic value is created.

Description

technical field [0001] The invention relates to the field of industrial waste salt separation and recovery, in particular to a chemical waste salt separation and recovery system and process. Background technique [0002] Chemical waste salt comes from a wide range of sources, involving pesticides, pharmaceuticals, dyes, printing and dyeing, electroplating and many other industries. It contains a large amount of toxic and harmful substances, such as organic matter, heavy metals, and is often accompanied by toxic odors, causing serious pollution to soil, groundwater and air. [0003] At present, the main treatment method for chemical solid waste salt is landfill, which is calcined before landfill and then landfill. This method of disposal not only consumes a lot of heat energy but also occupies a lot of land resources. It cannot be calcined, and eventually it enters the groundwater along with the waste salt, polluting the freshwater resources and affecting people's health. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/22C01D3/14C01D5/16B09B3/00B09B3/30B09B3/32B09B3/40
CPCC01D3/22C01D3/14C01D5/16B09B3/00C01P2006/80
Inventor 强修福俞经福李松山熊滨俞能平何大敏曹阳春曾军何少仁
Owner 安徽普朗膜技术有限公司
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