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Device for recovering sodium chloride and glycerol from high-salt glycerol-containing high-depth organic wastewater

A technology of organic waste water and recovery equipment, applied in the direction of organic chemistry, alkali metal chloride, hydroxyl compound separation/purification, etc., can solve the problems of waste of resources, pollution of the environment, failure to recycle, etc., and achieve the effect of ensuring feasibility

Inactive Publication Date: 2014-12-24
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, most of the high-salt glycerin-containing wastewater such as epoxy resin production wastewater in my country has been discharged beyond the standard. The high-concentration sodium chloride and glycerin in it have not been recycled, which not only pollutes the environment, but also causes great damage to resources. waste

Method used

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  • Device for recovering sodium chloride and glycerol from high-salt glycerol-containing high-depth organic wastewater
  • Device for recovering sodium chloride and glycerol from high-salt glycerol-containing high-depth organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Complexation

[0033] The high-salt glycerin-containing waste water is collected by the pipeline and discharged into the complexation reaction tank 1, and the alkali solution and copper sulfate are added in the complexation reaction tank 1, so that the glycerol contained in the waste water undergoes a complexation reaction with copper ions under alkaline conditions, Produce copper glycerol.

[0034] The concentration of sodium chloride in the high-salt glycerin-containing wastewater is 30%, the concentration of glycerin is 2%, and the alkaline solution is sodium hydroxide solution.

[0035] (2) Nanofiltration desalination (separation of glycerol and salt)

[0036]The effluent from the complexation reaction tank 1 in step (1) enters the multi-stage nanofiltration system 2 for graded filtration and desalination to obtain a nanofiltration concentrate containing copper glycerol and a nanofiltration dialysate containing sodium chloride. In order to ensure that the mult...

Embodiment 2

[0061] (1) Complexation

[0062] The high-salt glycerol-containing waste water is collected by the pipeline and discharged into the complexation reaction tank 1, and alkali solution and copper sulfate are added in the complexation reaction tank 1, so that the glycerin contained in the waste water undergoes a complexation reaction with copper ions under alkaline conditions, Glycerol copper complex is generated.

[0063] The concentration of sodium chloride in the high-salt glycerol-containing wastewater is 30%, the concentration of glycerin is 12%, and the alkaline solution is sodium hydroxide solution.

[0064] (2) Nanofiltration desalination (separation of glycerol and salt)

[0065] The effluent from the complexation reaction tank 1 in step (1) enters the multi-stage nanofiltration system 2 for graded filtration and desalination to obtain a nanofiltration concentrate containing copper glycerol and a nanofiltration dialysate containing sodium chloride. In order to ensure th...

Embodiment 3

[0090] (1) Complexation

[0091] The high-salt glycerol-containing waste water is collected by the pipeline and discharged into the complexation reaction tank 1, and alkali solution and copper sulfate are added in the complexation reaction tank 1, so that the glycerin contained in the waste water undergoes a complexation reaction with copper ions under alkaline conditions, Glycerol copper complex is generated.

[0092] The concentration of sodium chloride in the high-salt glycerol-containing wastewater is 22%, the concentration of glycerin is 12%, and the alkali solution is sodium hydroxide solution.

[0093] (2) Nanofiltration desalination (separation of glycerol and salt)

[0094] The effluent from the complexation reaction tank 1 in step (1) enters the multi-stage nanofiltration system 2 for graded filtration and desalination to obtain a nanofiltration concentrate containing copper glycerol and a nanofiltration dialysate containing sodium chloride.

[0095] The multi-stag...

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Abstract

The invention discloses a device for recovering sodium chloride and glycerol from high-salt glycerol-containing high-depth organic wastewater, which comprises a complexing reaction tank, a multistage nanofiltration system, an evaporator, a crystallizer, a decomplexing reaction tank, a centrifuge, a nanofiltration system, an adsorption unit, a desorbing agent storage tank, a distillation tower, a rectification tower and a glycerol storage tank. The device is based on the components, properties and existing treatment scheme of the high-salt glycerol-containing high-depth organic wastewater, and relates to the treatment steps of complexing, nanofiltration, decomplexing, centrifuging, adsorption, concentration by evaporation, crystallization, fractionation and the like. The wastewater treated by the treatment device has lower salt content, and is subjected to a biochemical treatment technique after being diluted, so that the quality of the effluent water reaches the standard; and meanwhile, the sodium chloride and glycerol are effectively recovered, wherein the purity of the finished product glycerol is up to 95%.

Description

technical field [0001] The invention relates to the field of water pollution control of environmental engineering, in particular to recovery of sodium chloride in high-salt glycerin-containing high-depth organic wastewater by combined treatment devices such as complexation, nanofiltration, decomplexation, centrifugation, adsorption, evaporation concentration, crystallization, and fractionation and glycerin. Background technique [0002] With the development of industry, the discharge of organic wastewater is increasing day by day. It is of great significance to treat organic wastewater so that it can be discharged up to the standard or recycled. In industrial production such as soap making industry, epichlorohydrin production, biodiesel production, glycerin production, etc., a large amount of organic wastewater with high salt and a certain concentration of glycerin will be produced. The concentration of sodium chloride is about 5-30%, and the content of glycerin About 2...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D3/04C07C29/74C07C31/22
Inventor 江中央王峰张世文林建龙
Owner BOYING XIAMEN SCI & TECH
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