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Device for recovering sodium chloride and glycerinum from high-salinity and high-depth organic wastewater containing glycerinum

A technology of organic waste water and recycling device, applied in the directions of alkali metal chlorides, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of waste of resources, pollute the environment, and have not been recycled, and achieve guaranteed feasibility Effect

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 glycerinum from high-salinity and high-depth organic wastewater containing glycerinum
  • Device for recovering sodium chloride and glycerinum from high-salinity and high-depth organic wastewater containing glycerinum

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 alkali 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 multi-...

Embodiment 2

[0059] (1) Complexation

[0060] The high-salt glycerin-containing wastewater is collected through the pipeline and then discharged into the complexation reaction tank 1. Alkaline solution and other metal salts are added to the complexation reaction tank 1 to make the glycerin contained in the wastewater complex with other metal ions under alkaline conditions. reaction to generate other glycerol metal complexes.

[0061] The concentration of sodium chloride in the high-salt glycerin-containing wastewater is 18%, the concentration of glycerin is 20%, the alkaline solution is sodium carbonate solution, other metal salts are zinc oxide, other metal ions are zinc ions, and other glycerol metal complexes The substance is zinc glycerol.

[0062] (2) Nanofiltration desalination (separation of glycerol and salt)

[0063] 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 nan...

Embodiment 3

[0085] (1) Complexation

[0086] The high-salt glycerin-containing wastewater is collected through the pipeline and then discharged into the complexation reaction tank 1. Alkaline solution and other metal salts are added to the complexation reaction tank 1 to make the glycerin contained in the wastewater complex with other metal ions under alkaline conditions. reaction to generate other glycerol metal complexes.

[0087] The concentration of sodium chloride in the high-salt glycerol-containing wastewater is 30%, the concentration of glycerol is 12%, the alkali solution is sodium carbonate solution, other metal salts are ferric chloride, other metal ions are iron ions, and other glycerol metal complexes The compound is iron glycerol.

[0088] (2) Nanofiltration desalination (separation of glycerol and salt)

[0089] The water effluent from the complexation reaction tank 1 in step (1) enters the multi-stage nanofiltration system 2 for graded filtration and desalination to obta...

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Abstract

The invention discloses a device for recovering sodium chloride and glycerinum from a high-salinity and high-depth organic wastewater containing glycerinum. The device comprises a complexing reaction tank, a multi-stage nanofiltration system, an evaporator, a crystallizer, a decomplexing reaction tank, a centrifuge device, a nanofiltration system, a reverse osmosis device, a distillation tower, a rectifying tower and a glycerinum storage tank. Based on components, properties and existing processing scheme of the high-salinity and high-depth organic wastewater containing glycerinum, the device relates to the processing procedures such as complexing, nanofiltration, decomplexing, centrifuging, reverse osmosis concentration, evaporation concentration, crystallization and distillation. The salinity of the wastewater which is processed by the treatment device is reduced, and a biochemical treatment process is adopted after the wastewater is diluted, so that the effluent quality reaches the standard, meanwhile, sodium chloride and glycerinum are effectively recovered, and the purity of the finished glycerinum product reaches 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): C02F9/10C01D3/04
Inventor 许雅玲王峰张世文林建龙
Owner BOYING XIAMEN SCI & TECH
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