Comprehensive treatment and reutilization method for industrial inorganic waste salt containing organic pollutants

A technology for comprehensive treatment of organic pollutants, applied in the field of comprehensive treatment and reuse of industrial inorganic waste salt, can solve the problems of uneven heating, difficult high temperature, and high equipment requirements

Active Publication Date: 2020-10-30
NANJING UNIV OF TECH +1
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sodium chloride absorbs microwave weakly and it is difficult to achieve high temperature. Under nitrogen atmosphere, long carbon chain organic matter and aromatic ring, condensed ring and heterocyclic organic matter cannot be oxidized and decomposed, and microwave treatment is prone to defects such as uneven heating and local overheating.
CN205659976U discloses a process for treating waste salt, adopts the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Comprehensive treatment and reutilization method for industrial inorganic waste salt containing organic pollutants
  • Comprehensive treatment and reutilization method for industrial inorganic waste salt containing organic pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The composition of sodium chloride waste salt to be treated: the mass fraction of sodium chloride is 90%, the mass fraction of ethylene glycol monomethyl ether is 2%, the mass fraction of catechol is 1%, and the mass fraction of benzene is 0.5% , waste salt TOC is 20635mg / kg.

[0029] Such as figure 1, sodium chloride waste salt to be treated is added with water, and stirred at room temperature until no obvious precipitated particles are prepared, and a solution with a mass fraction of sodium chloride of 25% is prepared; The phase accounts for 41wt% of the total organic matter in the sodium chloride waste salt to be treated. The TOC in the water phase obtained by liquid separation is 3365mg / L, and the water phase enters a multi-stage adsorption device composed of 5 adsorption towers connected in series at a flow rate of 150kg / h, and is adsorbed through the adsorption towers from bottom to top. Each adsorption tower is equipped with There are 10kg 40 mesh coconut shell...

Embodiment 2

[0032] The composition of sodium chloride waste salt to be treated: the mass fraction of sodium chloride is 95%, the mass fraction of phenol is 1%, the mass fraction of catechol is 1%, the mass fraction of benzene is 0.5%, and the waste salt TOC is 18820mg / kg.

[0033] Add water to sodium chloride waste salt, stir at room temperature until there are no obvious precipitated particles, and prepare a solution with a mass fraction of sodium chloride of 25%; stand for stratification, separate liquids, and separate the oil phase (4.99kg), which accounts for chlorine 38wt% of sodium chloride waste salt organic matter total amount. The TOC in the water phase obtained by liquid separation is 3089mg / L, and the water phase is sent to a multi-stage adsorption device composed of 5 adsorption towers in series at a flow rate of 250kg / h for adsorption. Each adsorption tower is equipped with 10kgMCM-41 molecular sieve , the processing capacity of MCM-41 molecular sieve is 25kg / (h·kg 吸附剂 ). ...

Embodiment 3

[0036] The composition of sodium chloride waste salt to be treated: the mass fraction of sodium chloride is 92%, the mass fraction of methyl acetate is 2%, the mass fraction of toluene is 1%, the mass fraction of tert-butanol is 1%, n-butanol The mass fraction is 1%, and the TOC in the waste salt is 31892mg / kg.

[0037] Add water to sodium chloride waste salt, stir at room temperature until no obvious precipitated particles, stir and dissolve to prepare a solution with a mass fraction of sodium chloride of 25%; let stand for layering, separate liquids, separate oil phase (14.3kg), oil The phase accounts for 64wt% of the total organic matter of sodium chloride waste salt. The TOC in the aqueous phase obtained by liquid separation is 4016mg / L, and it is sent to a multi-stage adsorption device composed of 5 adsorption towers in series at a flow rate of 100kg / h for adsorption. Each adsorption tower is equipped with 10kg of 40 mesh wooden activated carbon. , the processing capacit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the field of environmental protection, and discloses a comprehensive treatment and reutilization method of industrial inorganic waste salt containing organic pollutants, whichcomprises the following steps of: dissolving, layering and separating the industrial waste salt to obtain an oil phase and a waste salt solution; enabling the waste salt solution to enter an adsorption unit for adsorption treatment, adsorbing organic matters by an adsorbent, and purifying to obtain an industrial salt solution; enabling the saturated adsorbent to enter a microwave regeneration device, performing microwave pyrolysis regeneration in a nitrogen atmosphere, enabling generated gas containing organic matters and an oil phase obtained by liquid separation to enter an oxygen crackingdevice, and performing catalytic oxidative cracking treatment in an air atmosphere under the action of a catalyst to realize deep purification. According to the method, various sodium chloride industrial waste salts can be systematically and efficiently treated, the TOC removal rate reaches 98% or above, and the final recovery rate of sodium chloride reaches 99%. By adopting the method to treat the industrial waste salt, purification treatment and resource reutilization of the waste salt can be realized, and the method has very high social and economic benefits.

Description

technical field [0001] The invention belongs to the field of comprehensive treatment and utilization of environmental protection and chemical waste, and in particular relates to a method for comprehensive treatment and reuse of industrial inorganic waste salt containing organic pollutants. Background technique [0002] Waste salt and residues mainly come from the chemical industry, which have the characteristics of various types, complex components, multiple sources, high content of toxic and harmful substances, high treatment costs, and great environmental hazards. The treatment and disposal of waste salt and residues has become an urgent problem to be solved. . [0003] Chemical products, especially pesticides, will produce a large amount of by-product salt slag. The annual by-product salt slag in the country is more than 8 million tons of sodium chloride salt slag. The pollutants are mainly organic matter with complex components and poisonous Large, highly accumulative, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01D3/08
CPCC01D3/14
Inventor 崔咪芬乔旭杨俊浩刘清陈献周哲费兆阳
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap