JPS5950012A - Manufacture of ash for activated carbon using waste pine enchroached by pine weevil - Google Patents

Abstract

PURPOSE:To obtain activated carbon by the effective utilization of waste pine encroached by pine weevils by immersing the pine in wood tar or pitch coal tar, and calcining it. CONSTITUTION:Pine encroached by pine weevils is broken slenderly or in the form of chips with a chopper or the like. The broken pine is immersed in diluted wood tar or pitch coal tar to impregnate well with the tar, and it is dried and calcined.

Description

[Detailed description of the invention] Coniferous wood is an important raw material as an active IfA raw material, but in recent years this wood has become expensive both in Japan and abroad, and the supply as an active carbon source has been decreasing. The current situation is that only branches and stunted upper trunks can be purchased as carbon raw materials.On the other hand, the damage caused by pine-eating insects is increasing year by year in Japan's matsuyama mountains, and only abandoned pine trees are forced to be cut down and burned. In order to use this pine as a carbon source, the unique wood tension or spirit of the wood is lost, and the burned material is not a substance that can be called charcoal, but rather is called foamy charcoal or foamy ash. ) There is a process to increase the specific surface area, and there is also a process to make the carbon porous, but this is the manufacturing process when turning raw wood with its firmness and quality into activated carbon. Powdered activated carbon has a specific gravity of 0
．． 500.4, but when waste wood caused by pine insects is fired under the same conditions, it is 0. a 5 <> It has only a valence of 0.25. Powdered coal has an average weight of powdered coal.

Even if there is a small difference, it is impossible for the specific gravity to be halved.This difference in specific gravity is the difference between a fine tree and a spongy tree that has absorbed all nutrients, and this difference is the difference between whether or not it becomes activated carbon. This is a turning point. Although it is not possible to revive a dead tree into a living tree, burning it can be considered an effective use of resources if it becomes valuable as a carbon source.

The work procedure is to crush the waste water of pine carnivorous insects into linear shapes using a chipper or chopper, soak them in a diluted solution of wood tar and pitch coal tar, and once the wood tar, etc. (sap) is well absorbed by the waste wood, dry it. In the case of firing, even if the coniferous wood absorbs the tar from the deciduous tree, it does not pose a major problem in terms of the performance of the final activated carbon product.

4. Example What is the difference in specific gravity between treated waste wood 1 and treated waste wood 2? This was caused by the difference in the concentration of the dipping solution.

Claims (1)

[Claims] Making ash by soaking waste wood caused by pine insects in coal tar, pitch, and small pieces of tar, composites and gold products from valve construction work, and burning them.