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Treatment process of circulating cooling water with leaked ammonia nitrogen

A technology of circulating water and ammonia nitrogen, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of controlling bacteria, reducing nutrient sources, and having a wide range of applications

Inactive 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

[0003] Chinese patent application CN1258649A discloses a multi-component composite scale and corrosion inhibitor, the scale and corrosion inhibitor mainly includes organic phosphonic acid, sulfonic acid-containing copolymer and zinc salt, which can be used to treat petrochemical wastewater after secondary biochemical treatment The disadvantage is that the multi-component composite scale and corrosion inhibitor can only be used for the treatment of petrochemical wastewater with very little ammonia nitrogen content (0.14-1.88mg / L) as circulating water for replenishment

Method used

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  • Treatment process of circulating cooling water with leaked ammonia nitrogen
  • Treatment process of circulating cooling water with leaked ammonia nitrogen
  • Treatment process of circulating cooling water with leaked ammonia nitrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Prepare 100g medicine solution

[0038] Preparation process: Weigh 50g of sodium borate decahydrate and dissolve it in 42.25g of water, stir to dissolve, then add 3.33g of which the limiting viscosity is 0.072dL·g -1 , polyepoxysuccinic acid with a solid content of 30%, and finally add 4.42g of zinc sulfate heptahydrate and 10 drops of dilute sulfuric acid of 1:3 (volume ratio of concentrated sulfuric acid to water), fully dissolve, shake well, and obtain the required Prepared 100g medicament solution.

[0039] Add the prepared medicament solution to the test water 1 at a medicament concentration of 200mg / L, borate, polyepoxysuccinic acid, Zn 2+ The effective concentrations are 100mg / L, 2mg / L, and 2mg / L, respectively. The pH of the solution was then adjusted and stabilized at 8.7 with 4% NaOH.

Embodiment 2

[0041] Prepare 100g medicine solution

[0042] Preparation process: Weigh 50g of sodium gluconate and dissolve it in 21.12g of water, stir to dissolve, then add 26.67g of which the limiting viscosity is 0.070dL·g -1 1. Polymaleic anhydride with a solid content of 30%, finally add 2.21g of zinc sulfate heptahydrate and 10 drops of dilute sulfuric acid (volume ratio of concentrated sulfuric acid to water) 10 drops, fully dissolve, shake well, and obtain the required preparation 100g of medicament solution.

[0043] When the prepared drug solution is added to the test water 1 at a drug concentration of 100mg / L, the water gluconate, polymaleic anhydride, Zn 2+ The effective concentrations are 50mg / L, 8mg / L, and 0.5mg / L, respectively. The pH of the solution was then adjusted and stabilized at 8.7 with 4% KOH.

Embodiment 3

[0045] Prepare 100g medicine solution

[0046] Preparation process: Weigh 25g of sodium silicate and dissolve in 21.12g of water, stir to dissolve, then add 25g of sodium gluconate and 26.67g of limiting viscosity to 0.071dL·g -1 , methyl acrylate / styrene sulfonic acid copolymer with a solid content of 30% (the mass ratio of methyl acrylate / styrene sulfonic acid is 2:1), and finally add 3.14g of zinc chloride and 1:3 (concentrated sulfuric acid and water volume ratio) of dilute sulfuric acid 10 drops, fully dissolved, shaken, that is, to obtain the required preparation of 100g drug solution.

[0047] When the prepared drug solution is added to the test water 1 at a drug concentration of 100 mg / L, silicate, gluconate, methyl acrylate / styrene sulfonic acid copolymer, Zn 2+ The effective concentrations are 25mg / L, 25mg / L, 8mg / L, 1.5mg / L respectively. The pH of the solution was then adjusted and stabilized at 8.7 with 4% NaOH.

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Abstract

The invention relates to a treatment method of circulating water with leaked ammonia nitrogen, which comprises the following steps: a) controlling the pH value of the circulating water to 7.5-9.0; b) adding a scale and corrosion inhibitor which comprises the following components: A) at least one salt selected from water-soluble borate, water-soluble molybdate, water-soluble tungstate, water-soluble gluconate, and water-soluble silicate, B) at least one scale inhibiting dispersant which is at least one phosphorus-free polymer with a carboxylic group, C) a zinc salt, and optional D) a copper corrosion inhibitor; c) adding at least one non-chlorine bactericide which is a bromine-containing bactericide or a chlorine-containing bactericide that does not generate hypochloric acid or hypochlorite in water. The invention controls the problems of corrosion, scaling, and bacterial growth in the circulating water system with leaked ammonia nitrogen by methods of adjusting the pH value of the circulating water, and combining with the phosphorus-free scale and corrosion inhibitor and the non-chlorine bactericide.

Description

technical field [0001] The invention relates to a circulating cooling water treatment process, more specifically, the present invention relates to a circulating cooling water treatment process in which a production device leaks and ammonia nitrogen enters. Background technique [0002] Usually, the crude oil used in the refinery contains nitrogen-containing compounds. During the crude oil refining process, a material flow containing ammonia nitrogen will be produced. Once the device leaks, the material flow will inevitably enter the circulating cooling water system to form a cycle containing ammonia nitrogen. Cooling water. The entry of ammonia nitrogen into the circulating water system will make the main control indicators of circulating water pH, NO 2 - , NO 3 - , chemical oxygen demand (COD) and other analytical data seriously exceeded the standard, and a chain reaction caused by ammonia caused the water quality of the circulating cooling water to deteriorate, resulti...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 郦和生李春丽
Owner CHINA PETROLEUM & CHEM CORP
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