A chimney anti-corrosion structure and its construction method

Abstract

The invention discloses a chimney anticorrosion structure. The anticorrosion structure comprises a primer layer (2), an adhesive layer (3) and a titanium plate layer (4) arranged in sequence, and the primer layer (2) is coated on the chimney base On (1), the titanium plate layer (4) is adhered to the primer layer (2) through the adhesive layer (3). The invention also discloses a construction method for an anti-corrosion structure of a chimney, which comprises the following steps: cleaning the chimney base; brushing primer material on the cleaned chimney base; Glue, and paste the titanium plate; check and repair. The invention uses the titanium plate adhesive to directly stick the lapped titanium plate on the structural layer of the chimney, which has the advantages of short construction period and low requirements on the construction environment on site, and also solves the problems caused by poor welding environment on the construction site. Titanium plate welding quality problems.

Description

Technical field [0001] The invention relates to a chimney anti-corrosion technology, in particular to a chimney anti-corrosion structure that can be used in electric power, cement, metallurgy, chemical and other industries and a construction method thereof. Background technique [0002] In order to meet the requirements of the national environmental protection policy, the flue gas of large domestic thermal power plants must be desulfurized before being discharged into the atmosphere. The current desulfurization system generally uses limestone-gypsum wet desulfurization technology. After the flue gas passes through the desulfurization system, it is transformed into moist flue gas and wet flue gas. The wet flue gas, moist flue gas and the condensate produced by them are highly corrosive. A serious threat to the operation of equipment after the desulfurization system. [0003] In addition, most desulfurization flue gas systems have cancelled GGH (flue gas heater), and most of the exi...

AI Technical Summary

Problems solved by technology

The current desulfurization system generally adopts limestone-gypsum wet desulfurization technology. After the flue gas passes through the desulfurization system, it is transformed into moist flue gas and wet flue gas. Wet flue gas, wet flue gas and the condensate produced are highly corrosive. Serious threat to the operation of equipment after the desulfurization system

[0003] In addition, most flue gas desulfurization systems have canceled the GGH (flue gas heater), and most of the existing operating chimneys are designed according to the design criteria of dry flue gas chimneys, which are not suitable for the operating environment of wet flue gas, so many The chimney of the thermal power plant has a large area of ​​corrosion, which seriously affects the safe and stable operation of the entire power plant system

[0004] Based on the above problems, there are currently anti-corrosion treatments by welding titanium plates inside the chimney, but most of them have the following problems: 1) The construction period is long and the labor intensity of the workers is high; 2) Due to the poor welding environment on site, there are More welding quality problems; 3) The base of the chimney is prone to smoke leaks due to welding quality problems, resulting in corrosion

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