A kind of H acid production industrial wastewater treatment method

A technology for industrial wastewater and treatment methods, applied in water/sewage treatment, aerobic process treatment, natural water treatment, etc., can solve the problems of high fuel quality and combustion operating conditions, consumption of large oxidants, and immature technology. To achieve the effect of reasonable process design, high distribution coefficient, comprehensive management and resource utilization

Active Publication Date: 2018-03-06
BLUESTAR LEHIGH ENG INST CO LTD
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Problems solved by technology

The resin adsorption method is not effective for the treatment of high concentration industrial wastewater; the carbonization and incineration method is suitable for particularly high concentration wastewater, but the investment is expensive, and the requirements for fuel quality and combustion operating conditions are high; the membrane separation method is simple to operate, but the effect It is not ideal, t

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  • A kind of H acid production industrial wastewater treatment method

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Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, with reference to figure 1 , a kind of H acid production industrial wastewater treatment method, its steps are as follows:

[0020] (1) Extraction: Under normal pressure, H acid waste water is fully mixed with the extractant at 40°C for 2 minutes at a volume ratio of oil to water phase of 4:1. The raffinate phase after stratification is the extraction. The extractant is sent to the re-extraction section for regeneration; the extraction stage is one level;

[0021] (2) Back-extraction: take the above-mentioned extraction phase and mix it with lye at 40°C under normal pressure, add alkali to the back-extraction to control the pH end value at 8, and prepare the color-changing acid from the back-extraction after layering, and extract after regeneration Recycling agent is used for extraction, and the back extraction stage is one level; the lye is a NaOH solution with a mass concentration of 5%;

[0022] (3) Evaporation: extract the water and neutralize it to ...

Embodiment 2

[0024] Embodiment 2, with reference to figure 1 , a kind of H acid production industrial wastewater treatment method, its steps are as follows:

[0025] (1) Extraction: Under normal pressure, the H acid waste water is fully mixed with the extractant at 100°C for 10 minutes according to the volume ratio of the oil-water phase at 1:8. The raffinate phase after stratification is the extraction. The extractant is sent to the re-extraction section for regeneration; the extraction stage is one level;

[0026] (2) Stripping: Take the above extraction phase and mix it with lye at 100°C under normal pressure, add alkali in the stripping to control the pH end value at 11, and prepare the color-changing acid from the stripping solution after layering, and extract after regeneration Recycling agent is used for extraction, and the back extraction stage is one level; the lye is a KOH solution with a mass concentration of 30%;

[0027] (3) Evaporation: extract the water and neutralize it t...

Embodiment 3

[0029] Embodiment 3, with reference to figure 1 , a kind of H acid production industrial wastewater treatment method, its steps are as follows:

[0030] (1) Extraction: Under normal pressure, the H acid waste water is fully mixed with the extractant at 60°C for 5 minutes according to the volume ratio of the oil-water phase at 1:1. The raffinate phase after stratification is the extraction. The extractant is sent to the re-extraction section for regeneration; the extraction stage is one level;

[0031] (2) Stripping: Take the above extraction phase and mix it with lye at 60°C under normal pressure, add alkali in the stripping to control the pH end value at 9, and prepare the color-changing acid from the stripping solution after layering, and extract after regeneration Recycling agent is used for extraction, and the back extraction stage is one level; the lye is NaOH, KOH, sodium carbonate or sodium bicarbonate solution with a mass concentration of 20%;

[0032] (3) Evaporatio...

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Abstract

The invention relates to an H acid production industrial waste water treatment method. The method comprises the steps of extraction, re-extraction, evaporation, chromotropic acid synthesis and the like. After the waste water is homogenized and averaged, naphthalenesulfonic acid substances in the waste water are extracted by using a specially-selected extraction agent, an extraction phase is re-extracted by using alkaline liquid, the extraction phase is recycled after being regenerated, and the re-extraction liquid is used for synthesizing chromotropic acid. The raffinate is adjusted to be neutral and then enters an evaporation system so as to recycle sodium sulfate, and the desalted evaporated and condensed water is treated by an aeration biofilter or active carbon and is then discharged up to standard. The process design is reasonable, the operability is high, and the problems for comprehensive treatment and resource utilization of H acid production industrial waste water are effectively solved.

Description

technical field [0001] The invention relates to a treatment method for chemical product production wastewater, in particular to a treatment method for H acid production industrial wastewater. Background technique [0002] H acid (1-amino-8-naphthol-3, 6-disulfonic acid) is an important intermediate of naphthalene dyes, mainly used in the production of acid, reactive dyes and azo dyes, and can also be used in the pharmaceutical industry. The domestic H acid production process generally uses refined naphthalene as raw material, and is produced through sulfonation, nitration, neutralization, reduction, alkali fusion and acid precipitation. Sulfuric acid or hydrochloric acid is added in the acid analysis process to precipitate H-acid monosodium salt, and the waste mother liquor obtained after filtration is high-concentration, high-acidity, high-salinity and high-color H-acid production wastewater, and its CODCr is as high as 20000-50000mg / l , the pH value is 1-2, the main organ...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F9/14C07C303/22C07C309/43
CPCC02F1/048C02F1/26C02F1/281C02F3/02C02F2103/36C07C303/22C07C303/44C07C309/43C07C309/50
Inventor 杨志林董自斌王开春李学字郭涛胡聪袁丽娟刘德敏
Owner BLUESTAR LEHIGH ENG INST CO LTD
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