A kind of phosphorus-free composite water treatment agent

A technology of water treatment agent and bactericide, which is applied in the field of water treatment, can solve the problems of discharged water polluting the environment, etc., and achieve the effects of easy source of raw materials, prevention of "red tide" pollution, and convenient source of raw materials

Inactive Publication Date: 2012-02-01
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to prepare a composite water treatment agent with polyaspartic acid (abbreviated as PASA) as the main agent, to overcome the shortcoming of the system discharge water polluting the environment existing in the existing circulating water treatment technology, and to be used for industrial circulating cooling Treatment of Water System and Boiler Water System Water Quality

Method used

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  • A kind of phosphorus-free composite water treatment agent
  • A kind of phosphorus-free composite water treatment agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Place 200 mg polyaspartic acid, 120 mg polyacrylic acid, 120 mg terpolymer acrylic acid-acrylate-sulfonate, 80 mg sodium molybdate, 49.6 mg zinc sulfate, 400 mg dichloroisocyanuric acid and 1 liter of water in a stirred vessel Mix evenly to obtain the composite water treatment agent of the present invention. The pH value is 5.38.

[0031] The composite water treatment agent of gained is used for following water quality to carry out test: Ca 2+ 90.17mg / L, Cl - 9.54mg / L, SO4 2- 41.62mg / L, total alkalinity 143.745mg / L, conductivity 290μs / cm, PH 7.75.

[0032] Calcium carbonate scale inhibition test: Take 2L of test water quality, add the water treatment agent obtained in Example 1, the dosage concentration is 35mg / L, evaporate and concentrate in a constant temperature water bath at 80±1°C, until the concentration ratio reaches 5 times, scale inhibition The rate reached 98%.

[0033] Rotary hanging piece experiment: Fix 20# high-quality dyeing vat hanging piece on the ...

Embodiment 2

[0035] Put 300mg of polyaspartic acid, 200mg of polyacrylic acid, 150mg of terpolymer acrylic acid-acrylate-sulfonate, 70mg of ammonium aluminate, 60mg of zinc chloride, 400mg of chlorine dioxide and 1 liter of water in a stirring container and mix well , to obtain the composite water treatment agent of the present invention. The pH value is 5.89.

[0036] The composite water treatment agent of gained is used for following water quality to carry out test: Ca 2+ 90.17mg / L, Cl - 9.54mg / L, SO4 2- 41.62mg / L, total alkalinity 143.745mg / L, conductivity 290μs / cm, PH 7.75.

[0037] Calcium carbonate scale inhibition test: Take the test water quality, add the water treatment agent obtained in Example 2, evaporate and concentrate in a constant temperature water bath at 80±1°C, and when the concentration ratio reaches 5 times, the scale inhibition rate reaches 96%.

[0038] Rotary hanging piece experiment: Fix the 20# high-quality dye vat hanging piece in the hanging piece instrument...

Embodiment 3

[0040] Put 100mg polyaspartic acid, 500mg polyacrylic acid, 500mg terpolymer acrylic acid-acrylate-sulfonate, 80mg sodium molybdate, 100mg zinc sulfate, 400mg isothiazolinone and 1 liter of water in a stirring container and mix well , to obtain the composite water treatment agent of the present invention. The pH value is 5.01.

[0041] The composite water treatment agent of gained is used for following water quality to carry out test: Ca 2+ 90.17mg / L, Cl - 9.54mg / L, SO4 2- 41.62mg / L, total alkalinity 143.745mg / L, conductivity 290μs / cm, PH 7.75.

[0042] Calcium carbonate scale inhibition test: Take the test water quality, add the water treatment agent obtained in Example 3, evaporate and concentrate in a constant temperature water bath at 80±1°C, and when the concentration ratio reaches 5 times, the scale inhibition rate reaches 99%.

[0043] Rotary hanging piece experiment: Fix the 20# high-quality dye vat hanging piece in the hanging piece instrument, put it into the tes...

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Abstract

The invention belongs to a novel environment-friendly water treatment agent, in particular to a phosphorus-free composite water treatment agent. The water treatment agent comprises the following components: 1-7 parts by weight of polyaspartic acid; 0.5-5 parts by weight of molybdate parts by weight; 1-10 parts by weight of polyacrylic acid; 1-10 parts by weight of terpolymer; 2-100 parts by weight of bactericide. The water treatment agent of the invention does not contain phosphorus and other harmful substances to the ecological environment, is not easy to produce eutrophication, and can prevent the "red tide" pollution in the surrounding waters; has excellent corrosion and scale inhibition effects, and uses common surface water as supplementary water , When the concentration ratio is 2-6, the annual corrosion inhibition rate of carbon steel is below 0.02mm / a, and the scale inhibition rate of calcium carbonate in water can reach more than 90%. It is used for water quality treatment of industrial circulating cooling water system and boiler water system.

Description

technical field [0001] The invention belongs to water treatment technology, and is a phosphorus-free compound water treatment agent with anti-scaling and anti-corrosion functions, which is used for corrosion and scale inhibition and bactericidal treatment of industrial circulating cooling water and boiler water systems. Background technique [0002] At present, most of the domestic cooling water treatment agents belong to organic phosphine formula, and some enterprises also use inorganic phosphorus formula. Although phosphorus is non-toxic, as a nutrient source, it makes water eutrophic, promotes the excessive reproduction of microorganisms, especially algae, causes lake water blooms, seawater red tides and other hazards, and destroys the ecological balance. Developed countries in Europe and the United States have begun to ban phosphorus and limit phosphorus, and some cities and regions in my country have restricted phosphorus discharge. From the perspective of long-term de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/12C02F1/50C02F103/02
Inventor 陈国松王玲唐美华张之翼耿燕丁爱红封志杰吴丽娟
Owner NANJING TECH UNIV
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