Structured packing is a kind of packing that is arranged in a tower according to a uniform geometric figure and is neatly stacked. Due to its advantages of large specific surface area, small pressure drop, uniform fluid distribution, and high mass transfer and heat transfer efficiency, it has been widely used. Metal structured packing was developed in the early stage, and plastic structured packing, ceramic structured packing and carbon fiber structured packing were developed successively.

       Structured packing can be divided into two categories according to its structural characteristics: corrugated and non-corrugated. The former is divided into vertical corrugated type and horizontal corrugated type; the latter is divided into grid type and plate type.

       The most widely used of structured packing is vertical corrugated packing. Vertical corrugated packing is divided into plate corrugated type and mesh corrugated type. In the specification and model representation of corrugated packing, the numbers generally represent its specific surface area value, and the letters X and Y respectively represent the corrugated inclination angle of 30°C and 45°C. The inclination angle is 30°C. The pressure drop of the X-type packing is small; the mass transfer performance of the Y-type packing is better.

       The new corrugated packing can be made of stainless steel, copper, aluminum, pure titanium, molybdenum, titanium, and other materials. It is widely used in spices, pesticides, fine chemicals, petrochemicals and other fields. Structured packing is divided into mesh, wire mesh, orifice plate, calendered orifice plate, etc.

       Metal structured packing includes perforated plate corrugated packing, expanded mesh corrugated packing, perforated plate corrugated packing, wire mesh corrugated packing and annular corrugated packing.

       Orifice corrugated packing is a structured packing assembled with holes on the surface of metal sheet and large corrugations. It has the characteristics of low resistance, uniform gas-liquid distribution, high efficiency, large flux, and insignificant amplification effect. pressure and pressurization operations.

       Wire mesh corrugated packing is an important milestone in the development of structured packing. This packing is arranged by corrugated wire mesh sheets. The inclination angle of the corrugated sheets is 30° or 50°. When , the upper and lower two-person trays are staggered and stacked at 90°. It has the advantages of high efficiency, pressure drop and large flux. The products are BX and CY type, which are often used in vacuum distillation, atmospheric distillation and absorption process of difficult to separate and heat-sensitive materials.

       Punctured corrugated packing is a structured packing formed by rolling a slanted metal sheet to form small punctured holes with high density and then pressing into corrugated sheets. Wire mesh corrugated packing and other properties.

       Plastic structured packing includes honeycomb inclined tube, straight tube, plastic sheet corrugated packing and plastic wire mesh corrugated packing.

       1. Honeycomb inclined pipe: This product is mainly used for water purification, sand removal and accelerated sedimentation of domestic sewage, oil separation and tailings concentration, etc. It is an excellent water purification filler.

       2. Honeycomb straight pipe: This product is mainly used for contacting the microbial carrier in the oxidation tank, biological filter tower and biological turntable, for biochemical treatment of industrial organic wastewater or urban domestic sewage, and can also be used as packing material for chemical towers, cooling tower packing, etc.

       3. Corrugated plastic sheet, corrugated wire mesh packing: This product is mainly used in various industries such as gas purification, environmental protection and separation and purification. It has the advantages of light weight, large capacity, low pressure drop, high specific surface area, and easy replacement.