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Recycling process and system for high-salt and high-concentration non-biodegradable organic matter-containing H acid wastewater

A technology of refractory organic matter and high concentration, applied in the field of environmental resources, can solve the problems of high treatment cost and large organic waste residue, and achieve the effect of zero discharge, reduction of treatment cost, and reduction of sulfuric acid usage.

Active Publication Date: 2016-09-21
TIANJIN UNIVERSITY OF TECHNOLOGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic production of H acid is 130,000 tons, and the annual output of this kind of wastewater is about 3 million tons. It mainly adopts physical and biochemical combined treatment technologies such as extraction, adsorption, decolorization, oxidation, and concentration. completely solve the problem

Method used

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  • Recycling process and system for high-salt and high-concentration non-biodegradable organic matter-containing H acid wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A process for resource utilization of H-acid waste water containing high-salt and high-concentration refractory organic matter, the steps are as follows:

[0029] 1) Solvent crystallization

[0030] Add the H-acid wastewater into the dissolution and crystallization kettle, at a temperature of 35°C, use a Venturi circulation feeding system, add 40% of the quality of the H-acid wastewater to dissolve the crystallization solvent ethanol, leave it for 20 minutes, the sodium sulfate crystals are precipitated, and the sulfuric acid is separated The sodium crystal is sent to 3) the high temperature boiling granulation oxidation furnace system, and the waste acid solution is sent to step 2) the waste acid recycling section.

[0031] 2) Recycling of waste acid

[0032] The waste acid solution containing a large amount of dissolved solvent and sulfuric acid, a small amount of sodium sulfate, a small amount of H acid and other organic components from step 1) enters the evaporatio...

Embodiment 2

[0036] A process for resource utilization of H-acid waste water containing high-salt and high-concentration refractory organic matter, the steps are as follows:

[0037] 1) Solvent crystallization

[0038] Add the H-acid wastewater into the dissolution and crystallization kettle, and at a temperature of 45°C, use a Venturi circulation feeding system, add 30% of the quality of the H-acid wastewater to dissolve the crystallization solvent methanol, and leave it for 60 minutes, the sodium sulfate crystals are precipitated, and the sulfuric acid is separated The sodium crystal is sent to 3) the high temperature boiling granulation oxidation furnace system, and the waste acid solution is sent to step 2) the waste acid recycling section.

[0039] 2) Recycling of waste acid

[0040] The waste acid solution containing a large amount of dissolved solvent and sulfuric acid, a small amount of sodium sulfate, a small amount of H acid and other organic components from step 1) enters the e...

Embodiment 3

[0044] A process for resource utilization of H-acid waste water containing high-salt and high-concentration refractory organic matter, the steps are as follows:

[0045] 1) Solvent crystallization

[0046] Add the H-acid wastewater into the dissolution and crystallization kettle, and at a temperature of 50°C, use a Venturi circulation feeding system, add 15% of the H-acid wastewater quality to dissolve the crystallization solvent ethanol, leave it for 100 minutes, the sodium sulfate crystals are precipitated, and the sulfuric acid is separated The sodium crystal is sent to 3) the high temperature boiling granulation oxidation furnace system, and the waste acid solution is sent to step 2) the waste acid recycling section.

[0047] 2) Recycling of waste acid

[0048] The waste acid solution containing a large amount of dissolved solvent and sulfuric acid, a small amount of sodium sulfate, a small amount of H acid and other organic components from step 1) enters the evaporation ...

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Abstract

The invention discloses a recycling process and system for cyclic utilization of high-salt and high-concentration non-biodegradable organic matter-containing H acid wastewater and production of anhydrous sodium sulfate; the process for production of anhydrous sodium sulfate through solvent-out crystallization, waste acid cyclic utilization and high-temperature boiling granulation and oxidation is designed for the high-salt high-organic-matter H acid wastewater, so all components of the H acid wastewater are recycled with low cost, the production costs of H acid is reduced, zero emission of pollutants is achieved, and the method is the best way for H acid wastewater low-cost recycling, has demonstration significance for treatment of high-salt and high-concentration non-biodegradable organic matter wastewater, and has huge economic and social benefits.

Description

technical field [0001] The invention relates to a recycling process and system for producing anhydrous sodium sulfate by recycling H-acid waste water containing high-salt and high-concentration refractory organic matter, and belongs to the field of environmental resources. Background technique [0002] With the rapid development of petrochemical, pharmaceutical, plastic, synthetic fiber, coking, printing and dyeing and other industries, various waste water containing a large amount of high-salt, high-concentration and difficult-to-biodegradable organic pollutants has increased correspondingly, and their entry into the water body has caused serious damage to the environment. Pollution has plagued the healthy development of petrochemical, coal chemical and pharmaceutical industries. According to statistics, in 2015, the national petrochemical industry's wastewater discharge was 4.2 billion cubic meters, and the dye industry's high-salt and refractory organic wastewater alone h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D5/16
CPCC01D5/16C02F1/04C02F1/52C02F9/00C02F2001/5218Y02P20/10
Inventor 李梅彤袁文蛟张小江张柯夏协兵郑勇范文浩
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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