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Our company produces FRP chimneys, stainless steel chimneys, industrial chimneys and other equipment. The company has advanced FRP chimney production technology and strict management system. For more than ten years, it has carried out extensive horizontal cooperation with colleges and universities to jointly develop new product varieties. The products are sold all over the country and are well received by users.
FRP chimneys are made of FRP. The product has low cost, short production cycle, long life, convenient processing, simple installation, light weight, high strength and rigidity. It is made of FRP with smooth inner and outer surfaces, anti-aging performance, excellent corrosion resistance at high temperature, etc., and it is very convenient to add sprinklers, filters, etc. to absorb harmful components in the flue gas. The main part of the FRP chimney is made of winding process, and the FRP products formed by winding are composed of laminated structure.
The material of FRP chimney anti-corrosion is FRP, which has all the advantages of FRP. Through scientific and reasonable material selection, process design and structural design, the required technical indicators can be achieved.
The characteristics of FRP chimney anti-corrosion are as follows:
1. Chemical corrosion resistance: Through reasonable raw material selection and scientific thickness design, FRP anti-corrosion can be used for a long time in acid, alkali, salt and organic solvent environments.
2. Lightweight, high-strength and easy to install: The specific gravity is only 1/4-1/5 of steel and cast iron, and 2/3 of Qingdao FRP chimney concrete. The weight of FRP container is about 1/4 of the same specification steel container. Therefore, it is convenient to load and unload and easy to install.
3. Excellent electrical insulation performance: FRP material is an excellent insulating material used to make insulators. It can still protect good dielectric properties under high frequency. It has good microwave transmittance; it is suitable for use in power transmission, telecommunication line dense areas and thunderstorm areas.
4. Good heat and cold resistance: The operating temperature of ordinary FRP is generally -40~70℃. If special resin is selected or anti-ultraviolet absorber is added, the ambient temperature of the product application is -60~300℃, and it can also resist long-term sunlight exposure.
5. Good designability: Due to the different properties of the matrix material and the reinforcing material, FRP can meet different physical and chemical performance requirements through reasonable raw material selection, adjustment of FRP component ratio, change of reinforcement material laying method and scientific structural design.
6. Excellent mechanical properties: The tensile strength of FRP is lower than that of steel, higher than that of ductile iron and concrete, and the specific strength is about 3 times that of steel, 10 times that of ductile iron, and 25 times that of concrete. Excellent impact resistance, the drop weight of 1.5kg is not damaged at an impact height of 1600mm.
7. Excellent construction process performance: Before solidification, FRP can be easily processed into the required shape by different molding methods due to the fluidity of the resin; this feature is most suitable for the construction requirements of large, integral and complex equipment. On-site construction can be carried out according to environmental conditions.
8. No special insulation is required to achieve a good insulation effect. Small thermal expansion coefficient: Due to the small thermal expansion coefficient of FRP (2.0×10-5/℃), it can be used normally under various harsh conditions such as surface, underground, overhead, seabed, high cold, desert, freezing, humidity, acid and alkali.
9. Good thermal insulation performance: Since FRP products are composed of polymer materials and reinforcing materials, they have the characteristics of low thermal conductivity; at room temperature: 0.3~0.4KW/M.H.℃, only 1/100~1/1000 of metal, it is an excellent insulation material, so under small temperature differences (below 50℃).
The cylinder wall of FRP chimney should be composed of anti-corrosion inner lining layer, structural layer and outer surface layer. Due to the characteristics of FRP material, the FRP chimney needs to pay attention to the following problems during production. The last layer of resin in the outer surface layer should be air-free. Because FRP chimney is easily exposed to ultraviolet radiation in the open air, absorbent needs to be added. In addition, due to the poor wear resistance of FRP material, especially the impact and wear on corners or sudden changes will increase, which will lead to corrosion. We can improve the wear resistance of FRP in this part by adding wear-resistant fillers (such as silicon carbide, etc.) to the resin.
The working temperature of many chimney flues is very high and the composition of flue gas is very complex, so general resins cannot meet its condition requirements. Therefore, the design of FRP chimney must be standardized when selecting lining resin and structural layer resin. The temperature of flue gas in the event of an accident shall not exceed the glass transition temperature of the resin within half an hour. The long-term operating temperature of flue gas shall not exceed 100 degrees, and the minimum ambient temperature shall not be lower than minus 40 degrees. According to the design specifications of FRP chimneys, under normal use, the design life should meet the minimum requirements. The tension between the inner and outer cylinders of the FRP chimney should be calculated in coordination with the deformation of the inner and outer cylinders. The material of FRP can usually be divided into the inner lining anti-corrosion layer, the structural layer, and the outer protective layer in the order from the inside to the outside of the FRP.
Yunbai Environment focuses on the research and development, production and sales of FRP chimneys. We look forward to your call for consultation. Free service hotline: 4000-118-339
