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A kind of composite metal coating, its preparation method and use

A composite metal coating and metal technology, applied in coatings, epoxy resin coatings, degassed water/sewage treatment, etc., can solve problems such as equipment scaling, achieve small investment, good crystal blocking effect, and scale inhibition effect Good results

Active Publication Date: 2016-04-06
BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies of the prior art, in order to solve the problem of equipment fouling in the existing wastewater treatment process with high ammonia nitrogen, high salt and easy scaling, one of the purposes of the present invention is to provide a method for preparing a composite metal coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Surface pretreatment of deamination tower trays: after pickling and polishing the deamination tower trays that need to be coated, all kinds of oil, rust, scale, welding spots and other dirt are removed, and the surface becomes uniform after treatment. Silvery white, after drying, the surface of the loaded part is water-free, oil-free and rust-free.

[0044] (2) Preparation of metal coating materials: according to 0.2g / m 2 Accurately weigh 0.6g of nano-nickel oxide material, and weigh 18g of silicone-modified epoxy resin according to the mixing weight ratio of solid content and organic solvent of 1:30. In the temperature range of 65°C to 75°C, mix the nano-nickel oxide and the organic solvent evenly, and store it in a sealed manner within the temperature range of 65°C to 75°C;

[0045] (3) Coating material coating: evenly cover the metal coating material on the surface of the tray by brushing;

[0046] (4) Coating curing and formation: Transfer the trays in step (3...

Embodiment 2

[0048] (1) Surface pretreatment of deamination tower trays: after pickling and polishing the deamination tower trays that need to be coated, all kinds of oil, rust, scale, welding spots and other dirt are removed, and the surface becomes uniform after treatment. Silvery white, after drying, the surface of the loaded part is water-free, oil-free and rust-free.

[0049] (2) Metal coating material preparation: according to 0.01g / m 2 Accurately weigh 0.03g of zinc hydroxide material with a particle size of 0.05nm, and weigh 3g of organic titanium crosslinking agent according to the mixing weight ratio of solid content and organic solvent of 1:100. In the temperature range of 45°C to 85°C, mix the zinc hydroxide particles with the organic solvent evenly, and store them sealed and stored in the temperature range of 45°C to 85°C;

[0050] (3) Coating material coating: the metal coating material is uniformly covered on the surface of the tray by atmospheric plasma spraying;

[0051]...

Embodiment 3

[0053] (1) Surface pretreatment of deamination tower trays: after pickling and polishing the deamination tower trays that need to be coated, all kinds of oil, rust, scale, welding spots and other dirt are removed, and the surface becomes uniform after treatment. Silvery white, after drying, the surface of the loaded part is water-free, oil-free and rust-free.

[0054] (2) Preparation of metal coating materials: according to 5g / m 2 Accurately weigh 15g of copper acetate material with a particle size of 100 microns, and weigh 150g of 4~(2~aminoethyl)pyridine according to the mixing weight ratio of solid content and organic solvent 1:10. In the temperature range of 20°C to 45°C, mix the copper acetate particles with the organic solvent evenly, and store them sealed and stored in the temperature range of 20°C to 45°C;

[0055] (3) Coating material coating: evenly cover the metal coating material on the surface of the tray by dip coating;

[0056] (4) Coating curing and formation...

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Abstract

The invention relates to a preparation method for a composite metal coating material used for an inner side of a deamination tower and the surface of a tower internal. The preparation method comprises the following steps of: mixing a metal compound and an organic solvent in a proportion; coating a mixture on the inner side of a tower shell and the surface of the tower internal by a bushing coating, dip coating, thermal spraying or electrochemical deposition method; and aging to obtain the composite metal coating. By the composite metal coating, insoluble substances in calcium, magnesium, and heavy metal ion wastewater produced in ammonia nitrogen wastewater treatment process and the insoluble substances produced in a deamination process can be effectively prevented from being deposited in the deamination tower, and the phenomenon that the salt substances are crystallized to block the tower can be also prevented; and the coating has the characteristics of good scale inhabitation effect, low thickness, and high stability and solves the problem that the deamination tower is needed to be cleaned and maintained frequently due to scaling and blockage.

Description

technical field [0001] The invention relates to a coating material, in particular to an anti-scaling composite metal coating inside a deammonization tower that can be used in the treatment of wastewater with high ammonia nitrogen, high salt and containing heavy metals. Background technique [0002] In the production process of metallurgy, chemical industry, chemical fertilizer, food processing, electroplating and other industries, a large amount of high-concentration ammonia nitrogen wastewater is often produced. Because the concentration of ammonia nitrogen in this wastewater can reach 3000-80000mg / L, and the concentration of inorganic salt is high, it is difficult to use general Therefore, physical and chemical methods are often used for treatment. Patent CN101161596A discloses a method for treating non-ferrous metal processing wastewater containing ammonia and sulfate radicals, and proposes to use a deammonization tower to remove ammonia and realize recycling of ammonia w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D163/00C09D5/00C02F1/20
Inventor 林晓刘晨明林琳王启伟王波刘永胜谢学双韩志祥
Owner BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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