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Refining waste water biochemical system universal defoaming agent and preparation method thereof

A general-purpose, defoamer technology, used in chemical instruments and methods, separation methods, foam dispersion/prevention, etc., can solve the problems of reducing COD removal efficiency, affecting water heat dissipation, and increasing water temperature, reducing the surface freedom of foam. performance, improve stability, and reduce usage

Inactive Publication Date: 2019-04-16
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in summer, the thickening of the foam layer will significantly affect the heat dissipation of the water body, causing the temperature of the water body to rise, causing a large area of ​​biological sludge to die, and reducing the COD removal efficiency

Method used

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  • Refining waste water biochemical system universal defoaming agent and preparation method thereof

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Effect test

Embodiment 1

[0015] Embodiment 1: The general-purpose defoamer used in the wastewater biochemical treatment system in the refining and chemical industry of the present invention, calculated by mass percentage, has the following composition: tetradecyl alcohol 8%, methanol 2%, polyether modified 20% , 1% hydrochloric acid, 1% CMC, and the balance is deionized water.

[0016] Preparation process: Add polyether modified product, CMC, and tetradecyl alcohol in the reaction kettle according to the weight ratio, stir evenly, heat up to 65°C for aging reaction, and the aging time is 2 hours; then cool to room temperature, add while stirring Deionized water, hydrochloric acid, and methanol were kept stirring for 30 minutes to obtain a general-purpose defoamer product.

[0017] Examples of effect tests:

[0018] Water samples from the on-site wastewater biochemical treatment systems of three refineries were used as test sample liquids, namely A, B, and C. A quartz glass cylinder with a diameter o...

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Abstract

The invention discloses a refining industry waste water biochemical system universal defoaming agent. The universal defoaming agent is prepared from, by mass, 5-10% of myristyl alcohol, 1-3% of methylalcohol, 10-30% of a polyether modifier, 1-3% of hydrochloric acid, 1-3% of potassium carboxymethyl cellulose and the balance being deionized water; a modified polyether mixture is high carbon alkylhydroxyl allyl ether modified polymer, and the mass ratio of the alkyl carboxylic modified polyether is 1:(1-3). According to the refining industry waste water biochemical system universal defoaming agent, a nonionic and anionic compound blending system is applied, certain defoaming effects can be achieved for foam causes of various water sources in reining waste water, and the defoaming requirements of a factory in the sewage system running changing process can be met. Meanwhile, biological sludge death efficiency reduction cannot be brought to the system, and COD of system effluent cannot beaffected.

Description

technical field [0001] The invention relates to a defoamer for a water treatment system, in particular to an environment-friendly defoamer which is applied to aerobic biochemical treatment systems for various waste water in the refinery industry and does not cause additional pollution to treated water. Background technique [0002] Refining waste water of oil refining enterprises has the characteristics of high COD, high oil pollution, high sulfur and high phenol, and is complex and changeable. Alkali residue waste liquid, crude oil storage tank drainage, pump cooling water, ground flushing water in the process area, oily rainwater in the process unit area, circulating cooling water sewage, RO system concentrated drainage, boiler sewage, domestic sewage, etc. [0003] The oil in sewage mainly comes from the towers, tanks, oil-water separators, crude oil storage tank drainage, pump cooling water, etc. of the refinery unit. It is the main source of pollution, accounting for ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20B01D19/04
CPCB01D19/0404B01D19/0427C02F1/20
Inventor 王超王昊
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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