FRP storage tank is a kind of FRP products. It is a new composite material made by winding with microcomputer controlled machine with glass fiber as reinforcement and resin as adhesive. FRP storage tank has the characteristics of corrosion resistance, high strength, light weight and long service life. Because it also has the characteristics of flexible design and strong manufacturability, it can be flexibly designed and applied in different industries, such as chemical industry, environmental protection, food, pharmaceutical and other industries. It is gradually replacing most market fields of carbon steel and stainless steel.
Due to the great design flexibility of FRP storage tank and excellent structural performance of tank wall, fiber wound FRP can change the resin system or reinforcement materials to improve the physical and chemical properties of high-speed FRP storage tank and non-standard devices, so as to meet the needs of different media and working conditions. Through the structure and design of structural layer thickness, winding angle and wall thickness, the bearing capacity of the tank body is adjusted to make FRP storage tanks and non-standard devices with different pressure levels or some special properties, which can not be compared with isotropic metal materials.
1. Classification and introduction of FRP storage tanks
FRP tanks are divided into vertical and horizontal mechanically wound FRP tanks, FRP transport tanks, FRP reaction tanks and various chemical equipment. FRP horizontal tanks, vertical storage tanks, transport tanks, containers and large series containers. Epoxy furan resin, modified or polyester resin and phenolic resin are selected as the binder according to the used (storage or transportation) medium, and the corrosion-resistant lining layer, impervious layer It is composed of filament winding reinforcing layer and external protective layer.
2. Advantages and features
FRP products have excellent physical properties, higher specific strength than steel, cast iron and plastic, and the thermal conductivity is only 0.5 of steel. It is a good thermal and electrical insulation experience. FRP products have great design flexibility and excellent wall structure performance. The working temperature of the product is between -50 ~ 200 ℃ and the pressure resistance is generally below 6.4Mpa. It has the advantages of pressure resistance, corrosion resistance, aging resistance and long service life. It has the characteristics of light weight, high strength, anti-seepage, heat insulation, insulation, non-toxic and smooth surface. Mechanical winding FRP containers can adjust the physical and chemical properties of products by changing the resin system or using different reinforcement materials to meet the needs of different media and working conditions. Different pressures can be designed through the thickness of structural layer, winding angle and wall thickness, which is the remarkable feature of fiber winding composites.
3. Scope of application
It can be widely used in petroleum, chemical industry, textile, printing and dyeing, electric power, transportation, food brewing, artificial synthesis, water supply and drainage, seawater desalination, water conservancy irrigation and national defense engineering. The storage of various corrosive media can resist a variety of acids, alkalis, salts and organic solvents. It is mainly used in petroleum, chemical industry, pharmacy, printing and dyeing, brewing, water supply and drainage, transportation and other industries. It is suitable for the storage and transportation of hydrochloric acid, sulfuric acid, nitric acid, formaldehyde, methanol, wine, hydrogen peroxide, sewage, sodium hypochlorite and other products. It can also be used as underground oil tank, thermal insulation storage tank, transportation tank car, etc.
More than 90% of FRP products in China are produced by hand paste method, and others include molding method, winding method, lamination method, etc. Japan's hand paste method still accounts for 50%. From the perspective of all countries in the world, the hand paste method still accounts for a considerable proportion, indicating that it still has vitality. The hand paste method is characterized by molding with wet resin, simple equipment and low cost. It can paste the whole product more than 10m at a time. The disadvantages are low mechanization, long production cycle and unstable quality. China has imported extrusion, spraying, winding and other process equipment from abroad. With the development of FRP industry, new process methods will continue to appear.
