High temperature scales VEGF clay material, making long-term use temperature of 170 ℃ of FGD equipment, based on the operational situation indicates good performance. Desulfurization equipment used more often on early foreign chimney has applications are now less used. No domestic chimney applications. 2.3.6 anti-corrosion coating layer material pouring acid + 1) anti-corrosion coating layer, acid pouring steel inner cylinder surface material before brushing anticorrosive coating layer plus pour pouring acid material, within the general configuration pouring acid material layer and the inner cylinder with steel link steel mesh. Anticorrosive coating layer is OM Ⅰ type anti-corrosion coatings. Pouring acid resistant materials generally have acid resistant concrete, mortar acid potassium silicate layer 2) anti-corrosion coating layer, acid corrosion material pouring this scenario, construction conditions corrosion lining of poor quality control difficult. And high anti-corrosion lining design requirements, can not produce fine cracks penetrate chimney flue to prevent steel corrosion within the cylinder. Multi-tubular steel inner cylinder chimneys, steel corrosion within the cylinder liner pouring investment scheme lowest multi-tubular steel inner cylinder chimney program. Due to the inevitable anti-corrosion lining smoke corrosion, such steel chimney need regular repair and maintenance of the inner cylinder. According to Japan's experience, generally more than ten years on the need for re-corrosion lining repair and construction. 3) anti-corrosion coating layer, pouring acid construct flue and chimney lining material facing must be solved on the current world and China and corrosion of chimneys and flues, mainly in the following four types of corrosion-resistant materials. (1) chimney corrosion materials - glass, steel; (FRP) ① FRP chemical corrosion due to high and nickel alloys and low cost, so many wet from the system unit using fiberglass has achieved good results, according to foreign materials, glass and steel has been wet FGD The following aspects of the system have been successful applications: Tata body absorption, lime dissolving tank, water traps, mist eliminators, slurry pipes, flues, chimneys ② the inner fiberglass table smooth, easy fouling, wear acid. Therefore, a high velocity and high concentrations of particulate matter areas usually have better results FRP series of anti-corrosion material on the domestic market, the more common are: epoxy, modified OM have special anti-corrosion coating (2) chimney corrosion materials - rubber in the domestic market is relatively common with silicone rubber, polyurea, but the product is not high temperature, acidity can be an excellent waterproof, coal-fired units is not conducive to a long straight rows (3) chimney anti-corrosion materials - glass Since the main filler material flake glass flake is SiO2, its temperature resistance, excellent acid resistance, more common in the market are: foam glass tiles and glass flakes (4) anti-corrosion materials chimney - acid clay ① Use for wet desulfurization acid brick chimney liner inner tube corrosion. Coating temperature resistance and good acid resistance, adhesion, and long life (20 years), long-term effects can withstand high temperature flue gas long-term erosion and rapid thermal quench conditions, the net emissions after wet FGD flue chimney liner corrosion special coating materials. ② characteristics KY2 acid clay coating is a high quality silica, dispersants, stabilizers and fine aggregates and other raw materials, scientifically formulated by a certain percentage, which has the following excellent features: excellent chemical resistance, high temperature wet corrosive gas properties; low water vapor permeability, curing shrinkage, low coefficient of linear expansion; able to withstand long-term erosion and high temperature flue gas of acute thermal quench conditions; excellent wear resistance; good viscosity bondability; room temperature curing, molding construction is simple, easy to repair.