Anticorrosive and wear-resistant material for spraying zones of desulfurization towers

Abstract

The invention discloses an anticorrosive and wear-resistant material for the spraying zones of desulfurization towers. The material comprises an impermeable material, a reinforcing material and a wear-resistant material, wherein the impermeable material mainly comprises vinyl ester resin added with glass flakes; the reinforcing material mainly comprises vinyl ester resins, glass fiber cloth and glass fiber chopped strand mats; the wear-resistant material mainly comprises vinyl ester resin added with wear-resistant ceramic packing particles; and the wear-resistant ceramic packing particles can be divided into packing I, packing II and packing III mixed in certain proportion. The material disclosed by the invention has the advantages of low difficulty in construction, low cost, good anticorrosive effect, good wear-resistant performance, convenience in application and maintenance, and capability of effectively preventing the damage from an external force and an internal stress and resisting the corrosion of acid liquor or the erosion of flue gas, effectively resolving the problems of erosion, wear and damage of the wear-resistant material easily occurring in spraying zones of desulfurization towers, prolonging the service life of an anticorrosive layer, and greatly reducing the maintenance cost.

Description

technical field [0001] The invention relates to the field of industrial anticorrosion materials, in particular to an anticorrosion material for desulfurization towers. Background technique [0002] With the implementation of the national energy-saving and emission reduction strategic goals, thermal power plants or heating boilers need to carry out flue gas desulfurization and purification. must undergo anti-corrosion treatment. After the flue gas is desulfurized, although the content of sulfur dioxide in the flue gas is greatly reduced, the washing method is not effective in removing a small amount of sulfur trioxide in the flue gas. Due to the wet desulfurization, the flue gas humidity increases and the temperature decreases, the flue gas is easy to condense on the inner wall of the chimney, and the residual sulfur trioxide in the flue gas dissolves to form a highly corrosive dilute sulfuric acid solution. At present, there are many materials for acid corrosion resistance...

AI Technical Summary

Problems solved by technology

However, due to the large amount of high-speed flowing flue gas and granular solid substances during the operation of the desulfurization device, the erosion and wear of the anti-corrosion layer are quite serious; For the scouring of some parts, the conventional anti-corrosion layer will be eroded and thinned in a few days, and will soon be perforated and leak, resulting in the shutdown of the desulfurization equipment

[0003] In the prior art, for areas that need to be wear-resistant, one solution is to line acid-resistant tiles + adhesives as a protective layer of anti-corrosion materials. This solution has the disadvantages of difficult construction and time-consuming; the other is The solution is to use APC hybrid polymer + polytetrafluoroethylene as the protective layer of anti-corrosion materials. The construction is relatively simple, but it has the defect of poor performance. APC hybrid polymer has a certain anti-corrosion effect, but the wear-resistant effect is not good. Rely on polytetrafluoroethylene as the protective layer, but because tetrafluoroethylene is a material that is difficult to stick and weld, it is difficult to fix and play a protective role

Another solution is to use alloy materials, but alloy materials are very expensive, and it is difficult to process them twice, so it is not easy to promote