Method for integrally densifying, drying and carbonizing wood

Abstract

The invention provides a method for integrally densifying, drying and carbonizing wood. The method is implemented by the aid of a hot press and includes the steps: compressing the wood in the thickness direction on the hot press at the temperature of 130-150 DEG C; drying the wood in a pressure maintaining state when the wood is compressed to the target thickness; carbonizing the wood when the temperature rises to 180-220 DEG C. Therefore, the wood can be integrally and technically densified, dried and carbonized. The method has the advantages that the technological process is simple, production cycle is short, manpower and material resources are saved, economic benefit is high and the like.

Description

technical field [0001] The invention relates to an integrated treatment method of wood compaction, drying and carbonization, and belongs to the technical field of wood treatment. Background technique [0002] As a renewable energy source, in addition to beautifying the environment, wood has been widely used in construction, furniture and interior decoration since ancient times. However, this complex biological material with moisture porosity and viscoelasticity is restricted by many factors such as poor dimensional stability and poor corrosion resistance, which are closely related to wood composition and cell wall structure. Therefore, how to improve the dimensional stability, biological corrosion resistance and mechanical properties of wood is one of the important ways to improve the quality of wood. [0003] Usually, wood modification is divided into chemical modification, physical modification, and biological modification. Although chemical modification has quick results...

AI Technical Summary

Problems solved by technology

[0006] 1. The drying step is carried out in a drying kiln, resulting in long drying cycle, cumbersome process and increased production cost;

[0007] 2. When the wood moisture content is too low and the compression ratio is large, the wood cell wall is easily crushed and cracked, which reduces its mechanical strength;

[0008] 3. During the compression carbonization process, it is not clarified how to achieve the compression ratio thickness of the plate, the applied pressure and other important process parameters;

[0009] 4. The carbonization process only indicates that the temperature range of the press is 160-260°C, and does not specify the maximum temperature used for wood carbonization during specific operations.

Because the spontaneous ignition point of wood is around 240°C, this technology is carried out in an atmospheric environment with high oxygen content. If the temperature of the press exceeds 240°C, it is likely that the wood will spontaneously ignite, resulting in a lack of safety in production and even serious damage. the fire