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Method for recycling organic amine in AK sugar industrial wastewater

A technology for industrial wastewater and organic amines, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficulty, unsuitability and toxicity of organic amines in collection and purification, achieve a beneficial effect on the treatment

Inactive Publication Date: 2014-12-17
XIAN HUALU ENVIRONMENTAL PROTECTION EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The content of organic amines in wastewater is only about 2%. If ordinary distillation methods are used, only a dilute aqueous solution containing amines can be obtained. Moreover, organic amines are extremely explosive, similar in nature to gasoline and toxic, so it is not suitable to carry out related operations in the open air. So there are considerable difficulties in collecting and purifying organic amines

Method used

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  • Method for recycling organic amine in AK sugar industrial wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] After coarsely filtering the wastewater, add lime powder with 10% volume of wastewater into the wastewater to make the pH value of the water reach near neutral, add lime powder in stages and stir vigorously, vacuum filter to remove the neutralized calcium sulfate, and the filtrate Add 1% soda ash in the volume of waste water to the evaporating tank, adjust the pH to about 8 to release the amine, then collect the fraction of organic amine by fractionation in a fractionation tower filled with porcelain beads, and finally pass the organic amine through molecular sieve drying and resin adsorption Dehydration yields reusable organic amines.

Embodiment 2

[0014] Embodiment two: economic benefits

[0015] In the above wastewater treatment process, lime powder is mainly used as the neutralization raw material, so the treatment cost is low. At the same time, organic amine is a kind of industrial raw material with high value. This process combines the recovery and reuse of organic amine, and the organic amine in wastewater The recovery rate can reach more than 90%, and the value of the recovered organic amine is still a high surplus compared with the various expenses for wastewater treatment. The cost calculation is shown in Table-1

[0016] Table-1 Comparison of the cost of treating each ton of wastewater and the value of recovered organic amines

[0017] .

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Abstract

The invention relates to a method for recycling an organic amine in AK sugar industrial wastewater, belonging to the field of wastewater treatment and recycling methods. The method for recycling the organic amine in the AK sugar industrial wastewater comprises the following steps: neutralizing the wastewater by lime powder to enable the pH value of water to be nearly neutral; adding the lime powder by times and violently agitating; filtering the wastewater to remove neutralized calcium sulfate; adjusting the pH of a filtering solution in an evaporation tank to be about 8 by using sodium carbonate to release amine; carrying out fractionation by using a fractionation tower and collecting fractions of the organic amine; and finally, carrying out molecular sieve drying and resin adsorption dewatering on the organic amine to obtain the organic amine capable of being repeatedly utilized. According to the recycling method, the lime powder is used for neutralizing the wastewater and the amine is released by using the sodium carbonate; then the fractions are dried and purified and the recycled organic amine can be used as a raw material to be repeatedly utilized, so that the recycling rate of the organic amine in the wastewater can be up to more than 90%, and the treatment of the wastewater is facilitated.

Description

technical field [0001] The invention relates to a method for recovering organic amines from AK sugar industrial wastewater, belonging to the field of wastewater treatment and recycling methods. Background technique [0002] As a new type of edible sweetener with excellent performance, AK sugar has been widely used in the food industry. In the production process, excessive sulfuric acid and organic amines are used as raw materials, so the waste water contains sulfuric acid after the reaction mixture is extracted. and organic amines and other organic impurities. Among them, organic amines exist in the form of sulfates. Wastewater with these two substances cannot be discharged directly, and organic amines are industrial raw materials with high value, so they should be considered in the process of wastewater treatment. Recycling and reuse of organic amines. [0003] The content of organic amines in wastewater is only about 2%. If ordinary distillation methods are used, only a d...

Claims

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Application Information

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IPC IPC(8): C02F9/10
Inventor 陆强
Owner XIAN HUALU ENVIRONMENTAL PROTECTION EQUIP