Sodium hypochlorite storage tank is a type of fiberglass reinforced plastic product, which is mainly a new composite material made by winding glass fiber as a reinforcing agent and resin as a binder through a microcomputer controlled machine. Fiberglass storage tanks are corrosion-resistant, high-strength, lightweight, and have a long service life. Due to their flexibility in design and strong processability, they can be flexibly designed and used in different industries such as chemical, environmental protection, food, pharmaceutical, etc. They are gradually replacing carbon steel and stainless steel in most market areas.

The resin content of the surface layer and inner layer inside the cylinder is 80% to 90% and 68% to 78%, respectively; The strength layer is 25% to 40%; The outer surface layer shall not be less than 70%.

The cone angle of the inner wall shall not exceed 1 ° u12290X. Under loading conditions, the allowable circumferential strain of the tank wall shall not exceed 0.1%.

The fiber winding layer has a spiral winding angle of 80 ° u26102X and an axial tensile strength of not less than 15MPa.

1. Inner lining layer of sodium hypochlorite storage tank

The inner lining layer of fiberglass storage tanks consists of an inner surface layer and a sub inner layer, and the substrate should be made of resins with excellent corrosion resistance such as bisphenol A unsaturated polyester resin and vinyl ester resin. The reinforcing materials include glass fiber surface felt, glass fiber chopped strand felt, and glass fiber untwisted coarse gauze.

2. Strength layer of sodium hypochlorite storage tank

Made of universal unsaturated polyester resin as the matrix and glass fiber untwisted coarse gauze as the reinforcing material. The resin content is 45% -50%, and the thickness of this layer is determined by design calculations.

3. Outer surface layer of sodium hypochlorite storage tank

Using unsaturated polyester resin with excellent weather resistance as the matrix, glass fiber surface felt or glass fiber untwisted coarse gauze (thickness less than 0.16mm) as the reinforcing material, with a resin content greater than 55%, and a layer thickness of 0.2-0.5mm.

4. Penetration phenomenon of sodium hypochlorite storage tank

When designing, the first choice should be made between using full fiberglass storage tanks (troughs) or fiberglass veneers. Permeability is a function of the molecular weight and permeation pathway of the fluid, as water and some liquids with smaller molecular weight flow faster in fiberglass felt wastewater, and the temperature difference between the two sides of the lining is one of the flow dynamics.

Sodium hypochlorite storage tank is a type of fiberglass reinforced plastic product, which is mainly a new composite material made by winding glass fiber as a reinforcing agent and resin as a binder through a microcomputer controlled machine. According to the storage or transportation medium used, epoxy furan resin, modified or polyester resin, and phenolic resin are selected as binders, consisting of a high resin content corrosion-resistant inner lining layer, anti-seepage layer, fiber winding reinforcement layer, and outer protective layer.

Physical and chemical properties of fiberglass sodium hypochlorite tank

The design flexibility of the sodium hypochlorite tank made of fiberglass is high, and the structural performance of the tank wall is excellent. Fiber wrapped fiberglass can change the resin system or reinforcement material to adapt to the physical and chemical properties of high-speed fiberglass storage tanks and non-standard devices to meet the needs of different media and working conditions. By adjusting the load-bearing capacity of the tank body through structural layer thickness, winding angle, and wall thickness structure and design, fiberglass storage tanks and non-standard devices with different pressure levels or certain special properties can be made, which cannot be compared with isotropic metal materials.

Simultaneously resistant to chemical corrosion and with a long service life: Fiberglass has special corrosion resistance. When storing corrosive media, fiberglass exhibits unparalleled superiority over other materials, and can withstand various acids, alkalis, salts, and organic solvents.

Characteristics of sodium hypochlorite storage tank

(1) Lightweight and high-strength

The relative density is between 1.5 and 2.0, only 1/4 to 1/5 of that of carbon steel, but the tensile strength is close to or even exceeds that of carbon steel, while the specific strength can be compared with high-grade alloy steel. Therefore, it has excellent performance in aviation, rockets, spacecraft, high-pressure vessels, and other applications that require weight reduction. The tensile, bending, and compressive strength of some epoxy FRP can reach over 400Mpa.

(2) Good corrosion resistance

FRP is a good corrosion-resistant material that has strong resistance to atmospheric, water, and general concentrations of acids, alkalis, salts, as well as various oils and solvents. It has been applied to various aspects of chemical anti-corrosion and is replacing carbon steel, stainless steel, wood, non-ferrous metals, etc.

(3) Good electrical performance

It is an excellent insulation material used to manufacture insulators. It can still protect good dielectric properties at high frequencies. The microwave has good transparency and has been widely used in radar antenna covers.

(4) Good thermal performance

FRP has a low thermal conductivity of 1.25~1.67 kJ/(m · h · K) at room temperature, which is only 1/100~1/1000 of that of metals, making it an excellent insulation material. In the case of instantaneous ultra-high temperature, it is an ideal thermal protection and erosion resistant material, which can protect spacecraft from high-speed airflow erosion above 2000 ℃.

(5) Good designability

① Various structural products can be flexibly designed according to needs to meet usage requirements and ensure good overall integrity of the product.

② Materials can be fully selected to meet the performance requirements of the product, such as designing products that are corrosion-resistant, resistant to instantaneous high temperatures, have particularly high strength in a certain direction, have good dielectric properties, and so on.

(6) Excellent craftsmanship

① The molding process can be flexibly selected based on the shape, technical requirements, purpose, and quantity of the product.

② The process is simple and can be molded in one go, with outstanding economic effects, especially for products with complex shapes and small quantities that are difficult to shape, highlighting its technological superiority.

Design of fiberglass sodium hypochlorite tank

The design of fiberglass sodium hypochlorite tank mainly includes mechanical structure design, layer laying process design, and reasonable determination of curing and demolding time. The mechanical structure design of the storage tank should ensure that its strength and stiffness meet the requirements for use, so that the deformation of the storage tank is within the specified range. The main basis for design is that the stress on the structural layer of the storage tank is less than the allowable stress of the structural layer, that is, δ<; [δ]; The strain of the structural layer is less than the allowable strain, that is, ε<; [ε]。 Determine the winding line and number of winding layers of the storage tank structure layer based on these two factors. Mechanical structural design is extremely important. If the design is unreasonable, the deformation of the storage tank under stress will cause local cracks in the tank, and the structural layer will be damaged, which will directly lead to leakage of the storage tank. The laying process design is mainly based on the mechanical structure design of the storage tank to determine the specific laying structure and production practice plan, and to process the results of the mechanical structure design

Safe storage conditions for fiberglass sodium hypochlorite tanks:

As a new industrial product in the new era, fiberglass sodium hypochlorite tanks have the main advantages of strong corrosion resistance and high temperature resistance, but their hardness is not enough and they are prone to breakage Therefore, it is necessary to store it on a flat ground first to avoid the collapse of the fiberglass storage tank. Then, it is important to clean the storage space thoroughly and avoid any hard objects that may cause damage to the fiberglass storage tank. Finally, due to the low ignition point of fiberglass storage tanks, it is important to keep them away from sources of fire and maintain good ventilation in the storage space of the fiberglass water tank.