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A method of drying wood

A drying method and technology for wood, applied in the direction of wood drying, preliminary treatment to promote the drying of solid materials, drying of solid materials, etc. , The effect of speeding up the drying cycle and reducing drying defects

Active Publication Date: 2019-05-24
浙江润格木业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the drying cycle is relatively long, which is time-consuming and energy-consuming. Therefore, before drying, it is of great significance to pretreat the wood to improve its air permeability and open up the moisture channels inside the wood to shorten the drying time and reduce drying defects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for drying wood, comprising the following specific steps:

[0031]Step 1. Steam explosion treatment: The high-pressure blasting device includes a pressure tank, a steam generator and a pressurized pump. Put the wood that has been sawn into a board into the pressure tank, feed saturated steam, heat it to 60°C, keep it warm for 1 hour, and then use The booster pump pressurizes the pressure tank. After pressurizing to 0.5MPa, quickly open the pressure relief valve on the pressure tank and repeat the above steps 3 times;

[0032] Step 2. Impregnation treatment: put the plate after steam explosion treatment into a sealed tank, vacuum the tank to 0.08MPa negative pressure state, and keep it for 10 minutes. Under this negative pressure state, triethylamine trihydrofluoride and The mixed solution of ammonium hexafluorophosphate is filled with sealed tank, and the mass ratio of triethylamine trihydrofluoride and ammonium hexafluorophosphate in the mixed solution of desc...

Embodiment 2

[0038] A method for drying wood, comprising the following specific steps:

[0039] Step 1. Steam explosion treatment: The high-pressure blasting device includes a pressure tank, a steam generator and a pressurized pump. Put the wood that has been sawn into a board into the pressure tank, feed saturated steam, heat it to 80°C, keep it warm for 2 hours, and then use The booster pump pressurizes the pressure tank. After pressurizing to 1.5MPa, quickly open the pressure relief valve on the pressure tank and repeat the above steps 4 times;

[0040] Step 2. Impregnation treatment: put the plate after steam explosion treatment into a sealed tank, vacuum the tank to a negative pressure of 0.09MPa, and keep it for 20 minutes. Under this negative pressure, triethylamine trihydrofluoride and The mixed solution of ammonium hexafluorophosphate fills the sealed tank, and the mass ratio of triethylamine trihydrofluoride and ammonium hexafluorophosphate in the mixed solution of triethylamine ...

Embodiment 3

[0046] A method for drying wood, comprising the following specific steps:

[0047] Step 1. Steam explosion treatment: The high-pressure blasting device includes a pressure tank, a steam generator and a pressurized pump. Put the wood that has been sawn into a board into the pressure tank, feed saturated steam, heat it to 90°C, keep it warm for 3 hours, and then use The booster pump pressurizes the pressure tank. After pressurizing to 2MPa, quickly open the pressure relief valve on the pressure tank and repeat the above steps 5 times;

[0048] Step 2. Impregnation treatment: put the plate after steam explosion treatment into a sealed tank, vacuum the tank to 0.1MPa negative pressure state, and keep it for 30 minutes. Under this negative pressure state, triethylamine trihydrofluoride and The mixed solution of ammonium hexafluorophosphate fills the sealed tank, and the mass ratio of triethylamine trihydrofluoride and ammonium hexafluorophosphate in the mixed solution of triethylam...

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Abstract

The invention discloses a wood drying method. The wood drying method comprises the following steps of: firstly performing steam-explosion treatment; placing boards which are obtained by sawing wood into a pressure tank; after introducing saturated steam, performing heating and heat preservation; pressurizing the pressure tank by a pressure pump; after pressurization, quickly opening a pressure relief valve on the pressure tank; repeating the above steps for 3 times or more; performing impregnation treatment; placing the boards after steam-explosion treatment into a sealing tank; vacuuming the sealing tank to achieve a negative pressure state and maintaining the negative pressure state for a period of time; in the negative pressure state, filling the sealing tank with a mixed solution of triethylamine trihydrofluoride and ammonium hexafluorophosphate; raising the pressure in the sealing tank and maintaining the pressure; relieving the pressure; draining the remaining mixed solution of the triethylamine trihydrofluoride and the ammonium hexafluorophosphate; vacuuming the sealing tank to achieve a negative pressure state and maintaining the negative pressure state for a period of time; relieving the pressure; and finally, performing drying. Through the wood drying method disclosed by the invention, the drying speed of wood is increased and energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of wood processing, in particular to a wood drying method. Background technique [0002] Wood drying is an important process before wood product processing and an important prerequisite to ensure the quality of wood products. When the moisture content of wood is lower than the fiber saturation point through drying, it can destroy the parasitic conditions of bacteria and insects and increase the corrosion resistance of wood. Improve the mechanical strength of wood, improve wood processing performance, and prolong the service life of wood products. [0003] Generally, there are two main forms of moisture contained in wood. One is free water existing in the cell cavity and intercellular space. The increase or decrease of free water will only affect the weight of the wood, but will not affect the weight of the wood itself. Nature; the second is the adsorbed water adsorbed by the cell wall. The adsorbed water exists in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B1/00F26B7/00
CPCF26B1/00F26B7/00F26B2210/16
Inventor 陈伟星
Owner 浙江润格木业科技有限公司
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