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Corrosion and scale inhibitor for boiler

A corrosion and scale inhibitor, boiler technology, applied in descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc. The effect is not ideal, the tolerance of calcium ions is not high, etc., to achieve the effect of good scale inhibition, low production cost and good water solubility

Inactive Publication Date: 2014-04-23
刘晓萍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic phosphate has become the first choice because of its dual functions of corrosion inhibition and scale inhibition. However, the corrosion inhibition effect of organic phosphonate alone is still not ideal, and it is necessary to add a corrosion inhibitor that has a synergistic effect with it.
At present, although commonly used scale inhibitors can solve the structural problems of industrial boiler water treatment to a certain extent, there are still many shortcomings. They have low tolerance to calcium ions in water, and their scale inhibition ability in iron-containing and oil-containing water decreases. The performance of compounding and compatibility with other tax treatment corrosion and scale inhibitors is not satisfactory, and cannot meet the technical requirements for boiler scale inhibition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1 Preparation of nano-modified kaolin.

[0014] Take coal series kaolin (content is SiO 2 50wt%) 30g, add 2g of NaOH and 70g of water, stir evenly, then add 0.3g of zirconia, stir and heat up to 90°C, keep the temperature for 4h, filter, fully wash with deionized water, and dry at 100°C to obtain the modified Sexual kaolin.

Embodiment 2

[0015] Example 2 Preparation of nano-modified kaolin.

[0016] Take coal series kaolin (content is SiO 2 50wt%) 40g, add 3g of NaOH and 80g of water, stir evenly, then add 0.5g of zirconia, stir and heat up to 100°C, keep the temperature for 3h, filter, fully wash with deionized water, and dry at 120°C to obtain the modified Sexual kaolin.

Embodiment 3

[0017] Example 3 Preparation of corrosion and scale inhibitors for boilers.

[0018] A kind of corrosion and scale inhibitor for boiler, comprises the component of following weight fraction: Nano-modified kaolin (embodiment 1) 8 parts, sodium benzenesulfonate 20 parts, water 65 parts, polymaleic anhydride 13 parts, zinc sulfate 0.5 parts, 3 parts of alkyl ether, 7 parts of sulfamic acid, 0.5 parts of sodium humate. Mix the components in the above formula evenly to get the product.

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PUM

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Abstract

The invention discloses a corrosion and scale inhibitor for a boiler. The corrosion and scale inhibitor contains the following ingredients by weight: 6-10 parts of nano modified-kaolin, 15-30 parts of additive, 60-70 parts of aqueous solution, 10-15 parts of polymaleic anhydride, 0.2-0.8 part of zinc sulfate, 1-4 parts of alkyl ether, 5-10 parts of sulfamic acid and 0.1-1 part of sodium humate. The corrosion and scale inhibitor for the boiler has the advantages of wide source of raw materials, low production cost, high scale inhibition efficiency, low corrosion rate, high temperature resistance and convenience in use, is particularly suitable for water treatment of a hot water boiler, and can greatly prolong the service life of the boiler.

Description

technical field [0001] The invention relates to the field of chemical water treatment, in particular to a corrosion and scale inhibitor for boilers. Background technique [0002] After long-term use of boiler equipment, scaling and corrosion will inevitably occur. Controlling scaling is a major mission of industrial water treatment. The so-called scaling control is to control the calcium carbonate scale due to instability in the process of industrial water operation, and the barium sulfate and strontium sulfate scale due to "incompatibility". Calcium phosphate or zinc phosphate scale generated by the combination of corrosion agent and calcium ions in water, as well as iron oxide scale due to corrosion, sedimentary structure caused by the introduction of sediment, and microbial proliferation caused by microbial bacteria and algae. Organic phosphates have become the preferred species due to their dual functions of corrosion inhibition and scale inhibition, but the corrosion i...

Claims

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Application Information

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IPC IPC(8): C02F5/12
Inventor 刘晓萍
Owner 刘晓萍