Method for drying wood through moist heat microwave

Abstract

The invention provides a method for drying wood through moist heat microwave. The method comprises the following steps of (1) loading the wood, (2) injecting water, (3) performing microwave heating, and (5) exhausting moisture and cooling. In the process of drying the wood with steam, the flexibility of wood fiber is maintained, a good protection effect on the wood is achieved; and meanwhile, thedistortion of the wood is avoided. A large amount of moisture is carried in the steam, the wood is dried in a moist heat way, the moisture in the steam is absorbed when the wood absorbs heat, and under the condition that the surface of the wood is moist, the surface is not dried, and therefore, the surface cracking is avoided. Under the conditions of heating and moisture, the resin in the wood issoftened to achieve the effect that waterways in the wood are unblocked, and the moisture in the wood can freely enter or exit, so that the internal cracking of the wood is avoided. The wood fiber cannot sharply shrink under the moist heat effect, and cannot embrittle, the extensibility of the fiber is high, and the flexibility is high.

Description

technical field [0001] The invention belongs to the technical field of wood drying, and in particular relates to a method for drying wood with damp heat and microwaves. Background technique [0002] Wood is a kind of green and environment-friendly natural biomass material, which has the advantages of beauty, solidity and durability, and is widely used in wooden construction and home decoration materials. Wood is a natural polymer material with viscoelastic properties. The composition of wood is complex, mainly including wood fiber, different resins, various minerals and water. The resin and minerals in the wood not only increase the density of the wood, but also protect the wood fibers. During the drying process of the wood, the resin in the wood will solidify or crystallize, and the stability of the resin and minerals to the wood is important. have benefits. The main factor of wood instability is wood fibers. Because wood fibers are stretchable, wet wood fibers will stre...

AI Technical Summary

Problems solved by technology

Timely and staged humidification is also difficult to control;

[0007] 3) It is difficult to stabilize the wood by dry heat drying, because the temperature of dry heat drying is generally within 80°C, which cannot mature the wood fibers. If the dry heat drying temperature exceeds 80°C, the wood fibers will be brittle. , thereby destroying the toughness of wood fibers, and the phenomenon of surface cracking and internal cracking is more serious