Method for treating light oil-leaking circulating water

A treatment method and technology for circulating water, applied in the directions of oxidized water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Adhesion, low blowdown, simple operation effect

Active Publication Date: 2012-10-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for treating light oil-leaking circulating water
  • Method for treating light oil-leaking circulating water
  • Method for treating light oil-leaking circulating water

Examples

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Effect test

Embodiment 1

[0047] Preparation of scale and corrosion inhibitor: Dissolve 8.8g of zinc sulfate heptahydrate in 75.6g of water, dissolve evenly, add 8g of HEDP with a concentration of 50%, shake well, add 6.7g of acrylic acid / 2- Methyl-2'-acrylamidopropanesulfonic acid copolymer (the mass ratio of acrylic acid and 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 0.9g benzotriazole, shake well.

[0048] 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, 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 0.9mg / L respectively.

[0049] Add 200mg of pyrolysis gasoline to the beaker during the corrosion inhibition test, add 50mg of pyrolysis gasoline to the volumetric flask during the sca...

Embodiment 2

[0051] 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 and 2-methyl-2'-acrylamidopropanesulfonic acid in the copolymer is 7:3, The limiting viscosity at 30°C is 0.068dl / g), shake well.

[0052] 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.

[0053] Add 200mg of pyrolysis gasoline to the beaker during the corrosion inhibition test, add 50mg of pyrolysis gasoline to the volumetric flask during the scale inhibition...

Embodiment 3

[0055] Preparation of scale and corrosion inhibitor: Add 20g of PBTCA with a concentration of 50% into 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.

[0056] When the prepared scale and corrosion inhibitor solution is added to the test water (prepared from raw water 2) at a concentration of 100 mg / L, the effective concentrations of PBTCA and polyacrylic acid in the water are 10 mg / L and 10 mg respectively. / L.

[0057] 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 30mg / L of sodium cetylbenzenesulfonate. The test results are shown in Table 2.

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Abstract

The invention provides a method for treating light oil-leaking circulating water, comprising the following steps of: a) adding an oxidation type bactericide; b) adding a scale and corrosion inhibitor which comprises at least an organophosphonate acid, at least an organic carboxylic acid polymer, an optional copper corrosion inhibitor and optional zinc salt; and c) adding at least a long-chain alkyl aryl sulfonate surfactant. The method provided by the invention can be used to remove oil and peel off microbial slime from equipment of the circulating water system at a time without large-scale pollution discharge.

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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IPC IPC(8): C02F9/04C02F1/50C02F1/72C02F5/08C02F5/10C02F5/12C02F1/40
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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