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Technology for centrifugal extraction treatment of 1,4-dihydroxyanthraquinone industrial wastewater

A technology for dihydroxyanthraquinone and waste water production, which is applied in extraction water/sewage treatment, centrifuged water/sewage treatment, filtration treatment, etc. It can solve problems such as difficult separation and achieve large processing capacity, high safety factor, and low power consumption. low effect

Inactive Publication Date: 2019-12-03
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-speed shear of the drum of the centrifugal extractor will emulsify the two-phase liquid, making it difficult to separate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, a centrifugal extraction process for treating 1,4-dihydroxyanthraquinone production wastewater:

[0026] Adjust the pH value of 1,4-dihydroxyanthraquinone production wastewater to 0.8 with caustic soda, filter to remove mechanical impurities, input the heavy phase inlet of the centrifugal extractor under normal temperature and pressure, and input the new extractant into the light phase inlet of the centrifugal extractor at the same time. Centrifugal extraction and separation, waste water and extractant are 1:1 according to the ratio of oil to water, and the new extractant is composed of complexing agent, cosolvent, diluent and demulsifier; after separation, the heavy phase outlet is raffinate phase extracted water, After further treatment, it can be discharged or reused up to the standard; the light phase outlet is the extraction phase loaded with extraction agent, which is sent to back extraction for regeneration.

[0027] The stripping and regeneration meth...

Embodiment 2

[0034] Example 2, a centrifugal extraction process for treating 1,4-dihydroxyanthraquinone production wastewater:

[0035] Adjust the pH value of 1,4-dihydroxyanthraquinone production wastewater to 1.3 with caustic soda, filter to remove mechanical impurities, input the heavy phase inlet of the centrifugal extractor under normal temperature and pressure, and input the new extractant into the light phase inlet of the centrifugal extractor at the same time, carry out Centrifugal extraction and separation, waste water and extractant are 5:1 according to the ratio of oil to water, and the new extractant is composed of complexing agent, cosolvent, diluent and demulsifier; after separation, the heavy phase outlet is raffinate phase extracted water, After further treatment, it can be discharged or reused up to the standard; the light phase outlet is the extraction phase loaded with extraction agent, which is sent to back extraction for regeneration.

[0036] The stripping and regener...

Embodiment 3

[0043] Example 3, a centrifugal extraction process for treating 1,4-dihydroxyanthraquinone production wastewater:

[0044]Adjust the pH value of 1,4-dihydroxyanthraquinone production wastewater to 1 with caustic soda, filter to remove mechanical impurities, input the heavy phase inlet of the centrifugal extractor under normal temperature and pressure, and input the new extractant into the light phase inlet of the centrifugal extractor at the same time, carry out Centrifugal extraction and separation, waste water and extractant are 3:1 according to the ratio of oil to water, and the new extractant is composed of complexing agent, co-solvent, diluent and demulsifier; after separation, the heavy phase outlet is the water after extraction of the raffinate phase, After further treatment, it can be discharged or reused up to the standard; the light phase outlet is the extraction phase loaded with extraction agent, which is sent to back extraction for regeneration.

[0045] The strip...

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Abstract

The invention discloses a technology for centrifugal extraction treatment of 1,4-dihydroxyanthraquinone industrial wastewater. The pH value of the 1,4-dihydroxyanthraquinone industrial wastewater is adjusted to 0.8 to 1.3 through caustic soda, filtration is conducted to remove mechanical impurities, the 1,4-dihydroxyanthraquinone industrial wastewater is inputted into a heavy phase inlet of a centrifugal extractor at the normal temperature and pressure, meanwhile, a novel extraction agent is inputted into a light phase inlet of the centrifugal extractor, centrifugal extraction and separation are conducted, the oil-water phase ratio of the wastewater to the extraction agent is (1 to 5):(1), and the novel extraction agent is prepared from a complexing agent, a co-solvent, a diluent, and a demulsifier; after separation, raffinate phase extracted water is at a heavy phase outlet and is further treated for reaching the standard for discharging or reuse; and a extract phase loaded extractionagent is at a light phase outlet and sent to back extraction for regeneration. According to the technology for centrifugal extraction treatment of the 1,4-dihydroxyanthraquinone industrial wastewater, required investment is less, the floor area is small, the technological process is simple and reliable, the degree of automation is high, labor intensity is low, the production efficiency is high, and comprehensive treatment of the wastewater can be realized.

Description

technical field [0001] The invention relates to a process for treating waste water from chemical product production, specifically using a complex extraction method to treat 1,4-dihydroxyanthraquinone production waste water with a high-efficiency centrifugal extractor. Background technique [0002] 1,4-Dihydroxyanthraquinone is an important dye intermediate. To produce 1 ton of 1,4-Dihydroxyanthraquinone product, more than 60 tons of reddish-brown wastewater will be discharged, and its COD Cr As high as 8000-24000mg / l, the main pollution components are phthalic acid, a small amount of 1,4-dihydroxyanthraquinone and by-products, and the wastewater also contains about 10% sulfuric acid and a very small amount of boric acid. The wastewater treatment is difficult and costly, and most enterprises do not have effective treatment methods. [0003] The treatment by complex extraction technology is relatively reliable, but the current extraction process has long residence time, large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/26C02F1/38C02F103/36
CPCC02F1/001C02F1/26C02F1/38C02F1/66C02F9/00C02F2103/36
Inventor 王克云董自斌杨志林王开春李学字刘娟崔庆兰
Owner BLUESTAR LEHIGH ENG INST CO LTD
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