Successfully introduced foreign wet desulfurization FRP chimney flue anti-corrosion technology, promoted its application in the domestic market, and provided integrated services such as design, manufacturing, quality assurance, installation and commissioning required for flue gas desulfurization construction projects.

　　Although the flue gas temperature drops to 50-80°C after desulfurization, the flue gas still contains strong corrosive media such as hydrogen fluoride and chloride, and has a high moisture content, which increases the chance of corrosion of the inner wall of the chimney flue. When designing the chimney flue It should be considered that the flue gas temperature without wet desulfurization in emergency conditions is as high as 150-200°C, so the wet desulfurization chimney flue has high requirements for anti-corrosion and temperature resistance.

　　1. FRP chimney structure: It is composed of lining layer, structural layer and outer surface layer from the inside to the outside. It is divided into several structures such as self-standing, zipper type, tower type, sleeve type or multi-tube type. It adopts the integral winding molding process and has excellent mechanical properties, which is particularly suitable for the operating conditions of coal-fired power plants.

　　2. Features of fiberglass chimney products:

　　1. Excellent chemical corrosion resistance and fatigue resistance, which are better than titanium-nickel alloy and have long service life;

　　2. Small specific gravity, large diameter, light weight, high strength, low cost, lower cost than foam glass bricks, titanium-nickel alloy plates, etc.;

　　3. Easy to manufacture and install, with good quality control and short construction period;

　　4. Operation and maintenance costs are zero, and require less maintenance than foam bricks and flake coatings;

　　5. The overall structure has no corrosion weak points, eliminating solder joint corrosion, hydrogen corrosion, metal corrosion and electrochemical corrosion.

　　3. FRP flue: The conveying flue in the "Desulfurization Flue Tower Integrated" project is made of FRP because of its excellent corrosion resistance and durability, which saves anti-corrosion costs and has a service life of more than 30 years, which is similar to that of thermal power plants. The life cycle is consistent. At the same time, it is light in weight and can be erected in large spans without bracket support, saving construction costs. It can also reduce the power consumption and operating costs of thermal power plant equipment, eliminate the chimney in the traditional model, and save construction costs.

　　4. Application fields: Coal-fired power plants, metal smelting, chemical industry, petroleum, steel, building materials, coking, pharmaceutical and other industries.

　　5. Implementation standards:

　　HG/T20696-1999 "Design Regulations for FRP Chemical Equipment"

　　HG/T3983-2007 "Chemical Corrosion Resistant Field Wound Fiberglass Large Containers"

　　GB 50051-2013 "Chimney Design Code"

　　ASTM D5364 "Standard Guide for Design, Fabrication, and Erection of Fiberglass Reinforced Plastic Chimney Liners with Coal-Fired Units"

　　ASME/ANSI RTP-1 "Reinforced Thermoset Plastic Corrosion Resistant Equipment"