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Method for treating circulating water having wax oil leaked therein

A treatment method and technology for circulating water, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., and can solve the problems of expensive biological enzyme purifiers, etc. , to achieve the effect of high concentration ratio, 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 wax oil leaked therein
  • Method for treating circulating water having wax oil leaked therein
  • Method for treating circulating water having wax oil leaked therein

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 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 0.068 dl / g), shake well, add 0.5g benzotriazole, 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 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.

[0053] Apply 200mg of wax oil on the surface of the test piece during the corrosion inhibition test, and 50mg of wax oil on the inner w...

Embodiment 2

[0055] 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 46.5g 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 0.071dl / g), shake well.

[0056] 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.

[0057] Apply 200mg of wax oil on the surface of the test piece during the corrosion inhibition test, and 50mg of wax oil on the inner wall of the volumetric flask during the scale...

Embodiment 3

[0059] 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 0.069dl / g) , shake well.

[0060] 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.

[0061] Apply 200mg of wax oil on the surface of the test piece during the corrosion inhibition test, and 50mg of wax oil on the inner wall of the volumetric flask during the scale inhibition test, then add cetyltrimethylammonium chloride 30mg / L, op-10 30mg / L, test The results are shown in Table 2.

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Abstract

The invention provides a method for treating circulating water having wax 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; c) adding at least one quaternary ammonium salt type wax oil emulsifier; and d) 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 treatment method of circulating water, in particular to a treatment method of wax oil circulating water. Background technique [0002] Wax oil refers to heavy oil containing wax, an intermediate product in the oil refining process, which is liquid at room temperature, not easily soluble in water, and has a high viscosity. Wax oil leakage is a common type of material leakage in refining systems. When the wax oil leaks in the circulating water system, the following hazards will occur: 1) It will adhere in large quantities in the heat exchanger pipeline, seriously affecting the heat exchange effect, and even block the pipeline in serious cases; 2) The wax entering the cooling tower Oil is easy to adhere to the packing, reducing the heat dissipation effect and increasing the load of the packing support, and in severe cases, it will cause the packing to collapse; 3) The wax oil attached to the pipeline will make the corrosion and...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/50
CPCC23F11/08C23F14/02
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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