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Composite corrosion-retarding antisludging agent for treating high-concentration multiple circulating water

A corrosion and scale inhibitor, circulating water technology, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc. The effect of reduction, high concentration ratio and high water saving rate

Inactive Publication Date: 2009-08-26
上海潓溱环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the above technologies are more complicated, and some make it difficult for circulating water to operate under conditions of high concentration multiples or high pH values

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014]Embodiment 1: composite corrosion and scale inhibitor of the present invention comprises liquid part and solid part (being made up of liquid part and solid part), wherein: liquid part is the composite preparation of organic phosphonic acid, organic carboxylic acid and water, with liquid Based on 100% of the total weight of the part, the weight percentage of each component of the liquid part can be: 25% of organic phosphonic acid, 20% of organic carboxylic acid, and 55% of water. The present embodiment prepares 100Kg liquid portion (composite preparation), can use 55Kg water, 25Kg organic phosphonic acid (as can select 10Kg hydroxy ethylidene diphosphonic acid and 15Kg aminotrimethylene phosphonic acid, or select 25Kg 2-hydroxyphosphonoacetic acid for use) , or use 12.5Kg sodium ethylenediamine tetramethylene phosphonate and 12.5Kg diethylene triamine pentamethylene phosphonic acid), 20Kg organic carboxylic acid (such as 20Kg hydrolyzed polymaleic anhydride, or 10Kg maleic...

Embodiment 2

[0025] Embodiment 2: The composite corrosion and scale inhibitor of the present invention includes a liquid part and a solid part, wherein: the weight ratio of each component of the liquid part is: 20 g of hydroxyethylidene diphosphonic acid, 15 g of aminotrimethylene phosphonic acid, hydrolyzed Add 10g of polymaleic anhydride, 10g of acrylic acid-hydroxypropyl acrylate copolymer, and 55g of water into a beaker and stir evenly. The weight proportion of each component of the solid part is: sodium humate 25g, sodium carbonate 65g, mercaptobenzothiazole 2g, zinc sulfate 8g, put them in a container and stir evenly.

[0026] Experimental water quality (supplementary water quality): Calcium hardness is 200mg / L, total alkalinity is 200mg / L, and chloride ion (Cl-) content is 40mg / L.

[0027] The above-mentioned composite corrosion and scale inhibitor of the present invention and the above-mentioned experimental water quality were used to carry out the static calcium carbonate scale in...

Embodiment 3

[0033] Example 3: The composite corrosion and scale inhibitor of the present invention includes a liquid part and a solid part, wherein: the weight ratio of each component of the liquid part is: 25 g of hydroxyethylidene diphosphonic acid, 10 g of aminotrimethylene phosphonic acid, hydrolyzed Add 15g of polymaleic anhydride, 20g of acrylic acid-hydroxypropyl acrylate copolymer, and 45g of water into a beaker and stir evenly. The weight ratio of each component of the solid part is: sodium humate 30g, sodium carbonate 60g, mercaptobenzothiazole 3g, zinc sulfate 7g, put them in a container and stir evenly.

[0034] Experimental water quality: (supplementary water quality) calcium hardness is 250mg / L, total alkalinity is 250mg / L, and chloride ion (Cl-) content is 60mg / L.

[0035] Adopt above-mentioned composite corrosion and scale inhibitor of the present invention and above-mentioned experimental water quality to carry out static inhibition calcium carbonate scale, static inhibit...

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Abstract

A compound inhibition antisludging agent is used for treating high-concentration circulation water, comprising a liquid part and a solid part. Based on that the total weight of the liquid part is deemed to be 100 percent, percentages of each component by weight are: organic phosphonic acid 5-40 percent, organic carboxylic acid 5-40 percent and water 20-90 percent; and based on that the total weight of the solid part is deemed to be 100 percent, percentages of each component by weight are: polymer with antisludging effect 5-35 percent, alkaline agent 45-80 percent, azoles 1-10 percent and zinc salt 1-10 percent. The concentrations of the liquid part and the solid part in the circulating water are that: the solid part: the dosage of the agent added into make-up water is 20-200mg / L; the liquid part: total phosphine kept in the circulating water system is 10-15mg / L. The invention has effects of inhibition, antisludging, sterilization and algae removal upon meeting the requirements of the state, can promote the concentration multiple of the circulating water system up to 7.5 or more and can be operated at normal temperature with good effect and without pre-membrane treatment.

Description

technical field [0001] The invention relates to a water treatment agent for circulating water, in particular to a composite corrosion and scale inhibitor for treating circulating water with high concentration multiples, and is used for the treatment of circulating water with high concentration multiples (K>7.5). Background technique [0002] At present, most of the water treatment chemicals used at home and abroad are organic phosphine series chemicals. The concentration ratio of this series of chemicals is generally between 2 and 3, and the higher one is no more than 4, resulting in a lot of waste of water resources. Especially for my country, a country where per capita water resources are scarce, the shortage of water resources will seriously restrict economic development. The existing solid antiscalants generally have the problem of poor corrosion inhibition effect on carbon steel, which cannot meet the national standard of carbon steel corrosion rate of 0.1-0.2mm / year...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/14
CPCC23F14/02
Inventor 樊桂修
Owner 上海潓溱环保科技股份有限公司
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