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Treating method suitable for presumption of recycling pure water into circulating water system

A technology of circulating water system and treatment method, which is applied in the field of scaling and microbial reproduction, and inhibits the corrosion field after assuming that the purified water is reused in the circulating water system, and can solve the difficult control and aggravation of microbial reproduction and biological slime breeding, heat exchangers Corrosion scaling and other problems, to achieve the effect of easy industrial implementation, corrosion inhibition, low treatment cost

Inactive Publication Date: 2004-09-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a simple, effective and economical treatment method that assumes that the purified water is reused in the circulating water system, and solves the problem that the reproduction of microorganisms and the growth of biological slime are difficult to control after the assumed purified water is reused in the circulating water system. issues such as increased corrosion and fouling

Method used

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  • Treating method suitable for presumption of recycling pure water into circulating water system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This example is a corrosion test on a rotating coupon, which is carried out with reference to HG / T2159-91.

[0016] Test water quality: The test water is the on-site assumed clean water of a certain oil refinery after oil separation and settlement. The main water quality data are shown in Table 1.

[0017] project

[0018] Add different concentrations of NaHCO to the test water 3 , adjust the pH value to 8.0, then add 5mg / L hydroxyethylidene diphosphonic acid, 5mg / L hydroxyphosphine carboxylic acid, 5mg / L binary copolymer of acrylic acid and AMPS, 5mg / L zinc chloride, and rotate the plate The corrosion rate of the corrosion rate is 0.026mm / a, and the corrosion rate of the rotating coupon without the above-mentioned reagent is 1.32mm / a.

Embodiment 2

[0020] This example is a corrosion test on a rotating coupon, which is carried out with reference to HG / T2159-91.

[0021] Test water quality with embodiment 1.

[0022] Add different concentrations of NaHCO to the test water 3 , adjust the pH value to 7.5, then add 5 mg / L hydroxyethylidene diphosphonic acid, 8 mg / L sodium molybdate, 5 mg / L acrylic acid and 2-acrylamide-2-methylpropyl sulfonic acid binary copolymer , 5mg / L zinc chloride, the corrosion rate of the rotating coupon is 0.031mm / a, and the corrosion rate of the rotating coupon without the above-mentioned agents is 1.32mm / a.

Embodiment 3

[0024] This example is a corrosion test on a rotating coupon, which is carried out with reference to HG / T2159-91.

[0025] Test water quality with embodiment 1.

[0026] Add different concentrations of NaHCO to the test water 3 , adjust the pH value to 10.5, then add 5mg / L 2-phosphino-1,2,4-tricarboxylic acid-butane, 10mg / L sodium hexametaphosphate, 8mg / L acrylic acid and 2-acrylamide-2 - The binary copolymer of methyl propyl sulfonic acid, 5mg / L zinc chloride, the corrosion rate of the rotary coupon is 0.021mm / a, and the corrosion rate of the rotary coupon without the above-mentioned agent is 1.32mm / a.

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PUM

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Abstract

A method of handling reclaiming assumed pure water for circulating water system comprising the steps of, removing oil from the assumed pure water, depositing, introducing into the circulating water system, charging inorganic alkaline substance to make the pH of cycle water to be 7.0-11, charging germicidal agent and antisludging agent, wherein the alkaline substance is a mixture of two or more selected from NaOH, KOH, Na2Co3, K2Co3, NaiHCo3, and KHCO3, While the bactericidal agent is a mixture two or more selected from chlorine, sodium hypochlorite, potassium hypochlorite, calcium hypochlorite, dichloroisocyanuric acid, trichloroiminocyanuric acid, chlorine dioxide, bromine, sodium hypochlorite, potassium hypochlorite, calcium hypochlorite, and quaternary ammonium salt.

Description

technical field [0001] The invention relates to a treatment method suitable for reuse of assumed purified water in a circulating water system, specifically, a method for inhibiting corrosion, scaling and microbial reproduction after assumed purified water is reused in a circulating water system. technical background [0002] The hypothetical clean water mentioned in the present invention refers to the highly oily turbid water between industrial sewage and fresh water formed by internal machine pump cooling water, flushing surface water, rainwater, etc. of petroleum processing enterprises. The main characteristics of water quality are: compared with fresh water, it has high oil content and high suspended solids; compared with industrial sewage, it has low salt content and low content of other organic matter. After oil separation and settlement, the water quality can generally meet the national discharge standards. If there is no special requirement on the sewage downstream o...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/04
Inventor 李本高余正齐李亚红
Owner CHINA PETROLEUM & CHEM CORP
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