Method for treating circulating water having light oil leaked therein

A treatment method and circulating water technology, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, sterilization/microkinetics water/sewage treatment, etc., can solve the problems of expensive biological enzyme purifiers, etc. , to achieve the effect of preventing re-adhesion, low sewage discharge, and simple operation

Active Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are the use of expensive biological enzyme purifiers

Method used

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  • Method for treating circulating water having light oil leaked therein
  • Method for treating circulating water having light oil leaked therein
  • Method for treating circulating water having light oil leaked therein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of scale and corrosion inhibitor: Dissolve 8.8g of zinc sulfate heptahydrate in 76g of water, dissolve evenly, add 8g of HEDP with a concentration of 50%, shake well, add 6.7g of acrylic acid with a solid content of 30% / 2- Methyl-2'-acrylamidopropanesulfonic acid copolymer (the mass ratio of acrylic acid to 2-methyl-2'-acrylamidopropanesulfonic acid in the copolymer is 7:3, and the limiting viscosity at 30°C is 0.068dl / g), shake well, add 0.5g benzotriazole, shake well.

[0049] When the prepared scale and corrosion inhibitor solution is added to the test water (prepared from raw water 3) at a concentration of 100mg / L, the water HEDP, acrylic acid / 2-methyl-2'-acrylamide propane sulfonic acid copolymer, Zn 2+ The effective concentrations of benzotriazole and benzotriazole are 4mg / L, 2mg / L, 2mg / L and 0.5mg / L respectively.

[0050] Add 200mg of pyrolysis gasoline to the beaker during the corrosion inhibition test, add 50mg of pyrolysis gasoline into the volum...

Embodiment 2

[0052] Preparation of scale and corrosion inhibitors: Dissolve 10g of HPAA with a concentration of 40% and 8g of PBTCA with a concentration of 50% in 46.5 grams of water, dissolve evenly, add 8.8g of zinc sulfate heptahydrate, shake well, add 26.7g of solid content 30% acrylic acid / 2-methyl-2'-acrylamidopropanesulfonic acid copolymer (the mass ratio of acrylic acid to 2-methyl-2'-acrylamidopropanesulfonic acid in the copolymer is 7:3, The limiting viscosity at 30°C is 0.068dl / g), shake well.

[0053] When the prepared scale and corrosion inhibitor solution is added to the test water (prepared from raw water 3) at a concentration of 100 mg / L, HPAA, PBTCA, acrylic acid / 2-methyl-2'- Acrylamido propane sulfonic acid copolymer, Zn 2+ The effective concentrations are 4mg / L, 4mg / L, 8mg / L, 2mg / L respectively.

[0054] Add 200mg of pyrolysis gasoline to the beaker during the corrosion inhibition test, add 50mg of pyrolysis gasoline into the volumetric flask during the scale inhibitio...

Embodiment 3

[0056] Preparation of scale and corrosion inhibitors: add 20g of PBTCA with a concentration of 50% to 46.7g of water, shake well, add 33.3g of polyacrylic acid with a solid content of 30% (the limiting viscosity at 30°C is 0.071dl / g) , shake well.

[0057] When the prepared scale and corrosion inhibitor solution is added to the test water (prepared from raw water 2) at a concentration of 100mg / L, the effective concentrations of PBTCA and polyacrylic acid in the water are 10mg / L and 10mg respectively. / L.

[0058] Add 200mg of light diesel oil to the beaker during the corrosion inhibition test, add 50mg of light diesel oil to the volumetric flask during the scale inhibition test, and then add op-10 30mg / L. The test results are shown in Table 2.

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Abstract

The invention provides a method treating circulating water having light oil leaked therein. The method comprises a) adding an oxidation-type bactericide; b) adding an anti-scale corrosion inhibitor which contains at least one organic phosphonic acid, at least one organic carboxylic acid polymer, an optional copper material corrosion inhibitor and an optional zinc salt; and c) adding at least one polyethylene oxide non-ionic surfactant. The inventive method can remove oil and detach slime from equipment of a circulating water system in one step, without requiring discharge of a large amount of sewage.

Description

technical field [0001] The invention relates to a circulating water treatment method, in particular to a circulating water treatment method for light oil leakage. Background technique [0002] Light oil generally refers to hydrocarbon mixtures with a boiling point range of about 50-350°C. In the petroleum refining industry, it can refer to light distillates or light oil products. The former includes distillates such as gasoline (or naphtha), pyrolysis gasoline, kerosene (or jet fuel), light diesel oil (or atmospheric gas oil), top oil, raffinate, etc., which mainly come from crude oil distillation, catalytic cracking, Thermal cracking, petroleum coking, hydrocracking and catalytic reforming devices; the latter is the oil product obtained after light distillate oil is refined. When material leakage occurs, light oil is easy to emulsify with water and enter the circulating water system, providing sufficient nutrient source for the microorganisms in the system, so that the mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/50C02F5/14
CPCC23F14/02
Inventor 郦和生李博伟秦会敏张春原楼琼慧
Owner CHINA PETROLEUM & CHEM CORP
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