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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, and achieve the effects of easy-to-obtain raw material sources, low production costs, and convenient source of raw materials

Inactive Publication Date: 2010-06-23
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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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, comprising the following components in parts by weight: 1-7 parts of polyaspartic acid, 0.5-5 parts of molybdate, 1-10 parts of polyacrylic acid, 1-10 parts of terpolymer and 2-100 parts of bactericide. The water treatment agent does not contain phosphorus and other hazardous substance which are harmful to the environment, can not easily cause eutrophication, can prevent the pollution of the 'red tide' from being generated in the peripheral water area, has good corrosion inhibition and scale inhibition effects and takes the common surface water as make-up water, when the cycle of concentration is 2-6, the annual corrosion inhibition of carbon steel reaches lower than 0.02mm / a, and the scale inhibition of the calcium carbonate in the water can reach more than 90 percent. The invention is used for the water treatment of industrial recirculating water cooling systems and boiler water systems.

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 Applications(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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