Screen packaging mainly refers to materials that fill other items to a certain extent. In chemical engineering, it refers to the inert solid matter in the tower. In the polymer chemical industry, fillers are the most abundant additives. Almost all plastics (including thermoplastics and thermosets), natural rubber and coatings use large amounts of fillers.
The wire mesh filler is mainly made of its wire mesh in the manufacturing process. The pressure of the corrugated wire mesh packing is reduced and the separation efficiency is high. To a certain extent, the steel mesh filler is mainly composed of thin processing walls, large voids, large flux, low resistance, heat resistance, corrosion resistance, and good separation effect.
The mesh packing is suitable for its precision distillation and vacuum distillation equipment. To a certain extent, it provides a very effective means for the distillation of refractory and heat-sensitive systems. Although the cost of screen packaging is high, it is still widely used due to its excellent performance. Screen packing has the characteristics of compact structure, low resistance, high mass transfer efficiency, large processing capacity, and large specific surface area (125, 150, 250, 350, 500, 700, etc.).
Screen packing characteristics:
1. There are many theoretical plates, large flow and low pressure.
2. Good performance under low load. The number of theoretical plates increases as the gas load decreases, and there is almost no low load limit.
3. Flexible operation.
4. The amplification effect is not obvious.
5. It can meet the requirements of precise, large and high vacuum distillation equipment. Material: stainless steel, brass, phosphor bronze, low carbon steel, etc.
The screen packing plate can effectively open small holes and has a lot of energy in operation. To a certain extent, low pressure drop and high specific surface area can increase production, reduce energy consumption and improve efficiency during operation. . At the same time, due to the orderly arrangement of the packing, the solid particles in the material can be discharged through the corrugated bottom of the packing, so the anti-blocking performance is excellent and the operation flexibility is greater than that of ordinary towers. Instead of bulk tower packing, the production capacity can be increased by 5% and the production efficiency can be increased by 50%.
Screen packaging has the characteristics of light weight and low cost. It is very suitable for large-capacity towers when used. To a certain extent, the product is mainly made of polypropylene and can withstand a temperature of 100°C. The temperature range of glass fiber reinforced polypropylene plastic structured packing is less than or equal to 120°C. Products of both materials have strong chemical resistance. , The advantages of sodium hypochlorite oxide rare earth. Strong corrosion resistance, corrosion resistance of acid and alkali solutions. The product can be operated under negative pressure and pressure. It is widely used in the operation of various absorption and desorption devices such as hydrochloric acid, sulfuric acid, natural gas, environmentally friendly waste gas purification treatment and desorption and degassing devices.