Device for recovering glycerinum in high-salinity organic wastewater

An organic waste water and recycling device technology, applied in the preparation of organic compounds, organic chemistry, water pollutants, etc., can solve the problems of waste of resources, pollute the environment, and have not been recycled, and achieve the effect of ensuring feasibility

Inactive Publication Date: 2015-02-18
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 glycerinum in high-salinity organic wastewater
  • Device for recovering glycerinum in high-salinity organic wastewater
  • Device for recovering glycerinum in high-salinity organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] refer to figure 2 , Recover sodium chloride and glycerin from waste water containing 30% sodium chloride and 2% glycerin.

[0035] (1) Primary complexation

[0036] Introduce high-salt organic wastewater into the primary complexation reaction tank 1-1, and add sodium hydroxide solution and copper sulfate solution, so that the glycerol contained in the wastewater undergoes a complex reaction with copper ions under alkaline conditions to form a negative Divalent glycerol copper complex.

[0037] (2) Primary nanofiltration desalination

[0038] The waste water after the complexation treatment in step (1) enters the first-level nanofiltration system 2-1 for filtration and desalination to obtain the nanofiltration concentrate containing copper glycerol and the nanofiltration dialysate containing sodium chloride, and the dialysate contains sodium chloride 19%, analyzed by liquid chromatography, the glycerin content is 350mg / L. In order to ensure that the nanofiltration m...

Embodiment 2

[0054] refer to image 3 , Recover sodium chloride and glycerin from waste water containing 18% sodium chloride and 20% glycerol.

[0055] (1) Primary complexation

[0056] Introduce high-salt organic wastewater into the primary complex reaction tank 1-1, and add alkali hydroxide and copper hydroxide newly made from copper sulfate, and keep stirring so that the glycerol contained in the wastewater can be mixed with the alkaline condition under alkaline conditions. Copper hydroxide undergoes a complexation reaction to generate a negative divalent glycerol copper complex.

[0057] (2) Primary nanofiltration desalination

[0058] Make the waste water after the primary complexation treatment in step (1) enter the primary nanofiltration system 2-1 for filtration and desalination, and obtain the nanofiltration concentrate containing glycerol copper and the nanofiltration dialysis containing 15% sodium chloride and 8% glycerin liquid. In order to ensure that the nanofiltration me...

Embodiment 3

[0087] refer to Figure 4 , Recover sodium chloride and glycerin from waste water containing 22% sodium chloride and 12% glycerol.

[0088] (1) Primary complexation

[0089] Make the high-salt glycerol-containing wastewater enter the first-level complexation reaction tank 1-1, and add sodium hydroxide solution and copper sulfate solution, so that the glycerol contained in the wastewater undergoes a complexation reaction with copper ions under alkaline conditions to generate glycerol copper complexes.

[0090] (2) One-stage nanofiltration desalination (separation of copper glycerol and salt)

[0091] The wastewater after the complexation treatment in step (1) enters the first-level nanofiltration system 2-1 for filtration and desalination, and obtains a nanofiltration concentrate containing glycerin copper and a nanofiltration dialysate containing 17% sodium chloride and 4% glycerin .

[0092] (3) Secondary complexation

[0093] The nanofiltration dialyzate containing 17% ...

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Abstract

The invention discloses a device for recovering glycerinum in high-salinity organic wastewater. The device comprises a complexation system, a nanofiltration system, an evaporator, a crystallizer, a decomplexing reaction tank, a centrifugation device, a distillation tower, a rectifying tower and a glycerinum storage tank, wherein a water outlet of the complexation system is connected with a water inlet of the nanofiltration system; a nanofiltration dialysate outlet of the nanofiltration system is connected with a water inlet of the evaporator; a nanofiltration concentration liquid outlet of the nanofiltration system is connected with a water inlet of the decomplexing reaction tank; a water outlet of the evaporator is connected with a water inlet of the crystallizer; a water outlet of the decomplexing reaction tank is connected with a water inlet of the centrifugation device; a liquid outlet of the centrifugation device is connected with a water inlet of the distillation tower; a water outlet of the distillation tower is connected with a water inlet of the rectifying tower; and a water outlet of the rectifying tower is connected with the glycerinum storage tank. Glycerinum in wastewater treated by the device is effectively recovered, the purity of a finished product of glycerinum is up to 95%, meanwhile, salinity is reduced, a biochemical treatment process is adopted after dilution, and the effluent quality reaches the standard.

Description

technical field [0001] The invention relates to the field of water pollution treatment of environmental engineering, in particular to recovery of glycerin in high-salt organic waste water by combined devices such as complexation, nanofiltration, adsorption, evaporation concentration, crystallization, and fractionation. 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 2~20%, COD Cr About 20000~350000mg / L. The characteristics of high salt make it difficult to u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C07C29/74C07C29/88C07C31/22
CPCC01D3/06C02F1/04C02F1/442C02F1/58C02F9/00C02F2101/10C02F2101/34C02F2103/36C02F2301/08C07C29/74C07C29/88C07C31/225
Inventor 王峰张世文江中央林菁许雅玲
Owner BOYING XIAMEN SCI & TECH
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