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Propylene epoxide production wastewater treatment method

A technology for the production of wastewater and propylene oxide, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve the problems of poor treatment effect, immature treatment process, and high treatment cost , to achieve the effect of improving the treatment effect, ensuring stable and up-to-standard discharge, and high treatment efficiency

Active Publication Date: 2015-07-15
NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high treatment cost, immature treatment process and poor treatment effect in the existing propylene oxide wastewater treatment method, the present invention provides a treatment method for propylene oxide production wastewater

Method used

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  • Propylene epoxide production wastewater treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 Shown, the production wastewater of a certain production propylene oxide enterprise in Jiangsu, the raw water COD concentration is about 12000mg / L, and the salinity concentration is about 7000mg / L, adopts a kind of processing method of propylene oxide production wastewater of the present invention to process it, The design processing capacity is 2000t / d, and the steps are:

[0039] (a) Homogenization: Pump the propylene oxide production wastewater to the adjustment tank for adjustment and homogenization to reduce the concentration of suspended solids in the wastewater. In the adjustment tank, the temperature of the wastewater is controlled at 30-35 ° C. The adjustment tank adopts a push-flow type The submersible mixer adjusts the water quality, and the hydraulic retention time is 48h;

[0040] (b) Sedimentation: Introduce the adjusted waste water in step (a) into a circular radial flow type primary settling tank with a diameter of 14m for precipitation...

Embodiment 2

[0050] Such as figure 1 Shown, the production wastewater of a certain production propylene oxide enterprise in Jiangsu, the raw water COD concentration is about 10000mg / L, and the salinity concentration is about 8000mg / L, adopts a kind of processing method of propylene oxide production wastewater of the present invention to process it, The design processing capacity is 1000t / d, and the steps are:

[0051] (a) Homogenization: Pump the propylene oxide production wastewater to the adjustment tank for adjustment and homogenization to reduce the concentration of suspended solids in the wastewater. The temperature of the wastewater is controlled at 30-35°C. The adjustment tank uses a push-flow submersible mixer to control the water quality. Adjustment, the hydraulic retention time in the adjustment pool is 48h;

[0052] (b) Sedimentation: Introduce the adjusted waste water in step (a) into two vertical-flow primary sedimentation tanks with a size of 6×6m for precipitation, and the ...

Embodiment 3

[0062] Such as figure 1 Shown, the production wastewater of a certain production propylene oxide enterprise in Jiangsu, the raw water COD concentration is about 8000mg / L, and the salinity concentration is about 7000mg / L, adopts a kind of processing method of propylene oxide production wastewater of the present invention to process it, The design processing capacity is 1000t / d, and the steps are:

[0063] (a) Homogenization: Pump the propylene oxide production wastewater to the adjustment tank for adjustment and homogenization to reduce the concentration of suspended solids in the wastewater. The temperature of the wastewater is controlled at 30-35°C. The adjustment tank uses a push-flow submersible mixer to control the water quality. Adjustment, the hydraulic retention time in the adjustment pool is 36h;

[0064] (b) Sedimentation: Introduce the adjusted waste water in step (a) into two vertical-flow primary sedimentation tanks with a size of 6×6m for precipitation, and the s...

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Abstract

The invention discloses a propylene epoxide production wastewater treatment method and belongs to the field of wastewater treatment. The problems that an existing propylene epoxide production wastewater treatment method is high in treatment cost, immature in treatment process, poor in treatment effect and the like are solved. The treatment method specifically includes the steps that firstly, wastewater is homogeneously adjusted and flows through a two-stage anaerobic treatment system, so that macromolecular matter in the wastewater is converted into micromolecules, and biodegradability of the wastewater is improved; then, the wastewater acquired through two-stage anaerobic treatment is further treated through aerobic activated sludge, the wastewater acquired through aerobic treatment is deeply treated through a high-grade Fenton oxidization method, and the deeply-treated wastewater can reach the indirect emission standard through air floatation and precipitation reactions. The treatment method has the advantages that operation is simple, treatment efficiency is high, treatment cost is low, and it is guaranteed that the wastewater is emitted according to the standard through deep treatment.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and more specifically relates to a treatment method for propylene oxide production waste water. Background technique [0002] Propylene oxide, also known as propylene oxide and methyl oxirane, is a very important organic compound raw material and the third largest propylene derivative after polypropylene and acrylonitrile. Propylene oxide is mainly used to manufacture propylene glycol, propionaldehyde, isopropanolamine, polyether, petroleum demulsifier, defoamer, synthetic glycerin, organic acid, etc., and can be used as synthetic resin, foam plastic, plasticizer and surfactant It is an important basic chemical raw material. [0003] A large amount of sewage will be generated in the production process of propylene oxide, and about 50-80 tons of waste water will be generated for every ton of propylene oxide produced. The wastewater is characterized by high pH value, high salt content and hig...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 史小雪惠战友宋均轲闫婷婷
Owner NANJING INNOVATION CENT FOR ENVIRONMENTAL PROTECTION IND
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