Vacuum pump impregnated in vacuum and high pressure

Such as common antiseptic wood production. Many people don’t know the function of vacuum pump in the wood industry production, so they use a simple process and diagram to tell you how the vacuum pump plays a role in the anti-corrosion wood production. The core technology of anti-corrosion wood production is to penetrate the preservative into the wood through vacuum and high-pressure impregnation, so as to realize the reaction between the preservative and the starch, cellulose and sugar in the wood, destroy the living environment of the bacteria and ant insects that cause the wood to rot, and improve the outdoor anti-corrosion performance of the wood.

In the process, the dried wood is put into the pressure tank first, and the air in the tank is removed by the vacuum pump (the cell structure of the dried wood will be relatively fixed, so as to reduce the cracking and deformation of the wood, which is also conducive to the immersion of preservatives. In addition, wood vacuum drying is also one of the applications of vacuum pump); then, specific preservatives are injected into the wood, and then the preservatives are infiltrated into the inner layer of wood through pressurization; during the vacuum high-pressure impregnation, high temperature qualitative analysis is required to improve the anticorrosion performance; after the vacuum high-pressure impregnation is completed, the vacuum pump is also required to realize the vacuum recovery of redundant preservatives, so as to reduce the environmental impact of chemicals Finally, the wood is dried out of the tank to ensure that the preservative ingredients are fully fixed in the wood. After this step is completed, the anti-corrosion wood can enter the processing and finalization stage and be applied to specific scenes.


Before or after processing, wood must be protected from damaging effects of heat, moisture, insects and microorganisms. It is common to immerse wood in preservative solution, but the disadvantage is that the liquid can only penetrate wood for a few millimeters. However, if the wood is degassed and dried by means of a vacuum pump, comprehensive protection can be provided. The preservatives then penetrate deeper and optimize the protection.

Using a vacuum dryer in a conventional wood drying chamber can reduce the typical drying time from a few weeks to only 3 to 4 days. During the drying process, the pressure in the chamber gradually decreases to the minimum. The chamber is pressurized by steam and air is drawn out to prevent cracks and color changes in the wood, which may be caused by excessive oxygen content. Radial fans circulate steam and transfer heat to wood. Further steam condensate will be discharged from the drying chamber.

At present, vacuum high pressure impregnation is considered to be a good anticorrosive wood production process, so it has been widely used in wood production enterprises.

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