A scale inhibitor for boiler circulating water

A technology of circulating water and antiscalant, which is applied in the field of water treatment, can solve the problems of corrosion and scaling, severe scaling, and high strength of circulating water, and achieve the effects of preventing scaling and clogging, good scale inhibition effect, and good scale inhibition effect

Active Publication Date: 2016-08-17
徐州徐工精密工业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Circulating water plays an important role in the boiler system, but the circulating water used has high strength, high alkalinity, and serious scaling characteristics. When the water temperature is higher than the ambient temperature In various occasions, the scaling of calcium carbonate and other inorganic salts will bring serious consequences
When it is used as a circulating medium in an industrial circulating water system, it will cause deterioration of water quality, corrosion and scaling, etc., resulting in blockage or leakage of boilers and their pipes, seriously affecting the normal operation of production equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A scale inhibitor for boiler circulating water, consisting of the following components by weight:

[0039] Sodium lignosulfonate 4 parts

[0040] 1.5 parts of hydroxyethylene diphosphonic acid

[0041] Tetrasodium edetate 6 parts

[0042] Sodium hydroxide 1 part

[0043] Hypophosphorous acid copolymer sodium salt 1 part.

[0044] Using the scale inhibitor described in Example 1 makes the scale inhibition effect reach 99.1%, so that the scaling rate is reduced to 0.0031mm / a.

Embodiment 2

[0046] The scale inhibitor for boiler circulating water consists of the following components by weight:

[0047] Sodium lignosulfonate 5.7 parts

[0048] 2.4 parts of hydroxyethylene diphosphonic acid

[0049] Tetrasodium edetate 7.3 parts

[0050] Sodium hydroxide 1.2 parts

[0051] Hypophosphorous acid copolymer sodium salt 1.6 parts.

[0052] Using the scale inhibitor described in Example 2 makes the scale inhibition effect reach 99.21%, so that the scaling rate is reduced to 0.0026mm / a.

Embodiment 3

[0054] The scale inhibitor for boiler circulating water consists of the following components by weight:

[0055] Sodium lignosulfonate 6.4 parts

[0056] 3.8 parts of hydroxyethylene diphosphonic acid

[0057] Tetrasodium edetate 8.4 parts

[0058] Sodium hydroxide 1.32 parts

[0059] Hypophosphorous acid copolymer sodium salt 2.26 parts.

[0060] Using the scale inhibitor described in Example 3 makes the scale inhibition effect reach 99.3%, so that the scaling rate is reduced to 0.00253mm / a.

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PUM

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Abstract

The invention belongs to the technical field of water treatment and particularly relates to a scale inhibitor for boiler circulating water. The scale inhibitor for boiler circulating water consists of the following components in parts by weight: sodium lignin sulfonate, 1-hydroxyethylidene-1,1-diphosphonic acid, ethylene diamine tetraacetic acid tetra-sodium salt, sodium hydroxide and hypophosphite copolymer sodium salt. The scale inhibitor disclosed by the invention is convenient to use, low in toxicity, odorless and good in dispersing performance.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a scale inhibitor for boiler circulating water. Background technique [0002] Circulating water plays a pivotal role in the boiler system, but the circulating water used has high strength and high alkalinity, and has serious scaling characteristics. When the water temperature is higher than the ambient temperature, the scaling of inorganic salts such as calcium carbonate will have serious consequences. When it is used as a circulating medium in an industrial circulating water system, it will cause deterioration of water quality, corrosion and scaling, etc., resulting in blockage or leakage of boilers and their pipes, seriously affecting the normal operation of production equipment. With the rapid development of social economy and technological progress, water treatment technology has been paid more and more attention. The use of water treatment chemicals can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/10C02F5/14C02F5/12C02F5/08
CPCC02F5/105C02F5/145
Inventor 艾永生
Owner 徐州徐工精密工业科技有限公司
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