Power plant used mortar tube with anticorrosive and wear-resistant lining and coating method thereof

An anti-corrosion and wear-resistant, power plant ash technology, applied in the direction of pipeline anti-corrosion/anti-rust protection, pipeline damage/abrasion prevention, damage protection, etc. Pinholes and other problems, to achieve the effect of good mechanical strength and good corrosion resistance

Inactive Publication Date: 2010-05-26

安志国

2 Cites 2 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The pipes used in this system need to consider their anti-corrosion and wear resistance. At present, the method of lining the steel pipe with rubber is used, and the inner wall of the pipe is sandblasted, washed with solvents, coated with rubber and t...

Abstract

The invention relates to a power plant used mortar tube with an anticorrosive and wear-resistant lining coated on the inner wall. The mortar tube comprises a metal substrate and a lining, wherein the lining is formed by spreading coatings disclosed by CNS710092*.CN97111379, 3 and CN00126503, 2 or by the invention on a substrate and then thermally melting the coatings. The coating method of the lining comprises the following steps: derusting the substrate by sandblast and deoiling with solvent; heating the substrate to 180-260 DEG C; spraying a powdered coating on the substrate; keeping temperature and solidifying at 180-260 DEG C for 1h. The lining has no bubble or pinhole, resists corrosion, abrasion and cavitations and is firm to adhere and simple, convenient and practical to construct.

Application Domain

Corrosion preventionPipe protection against corrosion/incrustation +1

Technology Topic

SolventMetal substrate +7

Examples

Experimental program(4)

Example Embodiment

[0015] Example one

[0016] The trial conditions of the power plant mortar pipe prepared by using the high-strength anti-corrosion and wear-resistant powder coating lining described in CN8710092X and its coating method are as follows: The parameters of the gypsum slurry or lime water slurry used to transport the medium are the average density of 1158kg/m 3 , The solid content is 40%, the solid concentration is 50-100g/L, the flow rate is 108m/h (0.03m/s), the temperature is ≤51℃, the pressure is 1.6Mpa, and the pH is 4 to 5.5.

[0017] Trial in the slurry pipeline of Shanxi Zhangze Power Plant 5# (210MW) flue gas desulfurization system. The installation position is the outlet of the gypsum slurry pump. The test pipeline specification is ￠159×4.5 ordinary carbon steel pipe straight pipe and 800mm, 90°R=260 bend One piece of each pipe, spray the above-mentioned paint (with flange) on the inner surface of the steel pipe, the thickness of the coating is 0.8mm, open for inspection after 316 days of operation (5008 hours of operation), the coating surface has not changed, compared with before installation The weight loss is equal to zero.

[0018] The results show that the coating has strong adaptability to long-term damp, heat, corrosion, and abrasion environments, and has the advantages of strong adhesion, high density, good impermeability, and no cracking and aging.

Example Embodiment

[0019] Embodiment two:

[0020] The coating lining and coating method described in CN97111379.3 were used to make a coated tube and used in series with the lining tube described in Example 1, and the result was the same.

Example Embodiment

[0021] Embodiment three:

[0022] The coating tube made by the coating lining and coating method described in CN00126503.2 is used in series with the lining tube described in Example 1, and the results are the same as in Example 1.

PUM

Property	Measurement	Unit
Average density	1160.0	kg/m³

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Good mechanical strength
Good corrosion resistance

Power plant used mortar tube with anticorrosive and wear-resistant lining and coating method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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