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Wood chip drying process

A drying process and wood chip technology, applied in the field of wood processing, can solve the problems of difficulty in ensuring the drying quality of wood chips, uneven heating area of ​​wood chips, uneven heating, etc., and achieve the advantages of shortening drying time, fast drying speed and reducing damage rate of wood chips. Effect

Inactive Publication Date: 2017-05-31
张松波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat of these wood drying methods is introduced from the outer surface of the wood, which easily leads to uneven heating, resulting in uneven heating area of ​​wood chips, and it is difficult to ensure the drying quality of wood chips; at the same time, these methods consume a lot of energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A wood chip drying process, comprising the following steps:

[0024] 1) Pretreatment: remove the leaves and branches of the felled wood, then peel the wood, then slice the wood, and stack it according to the same specifications to obtain wood chips for subsequent use;

[0025] 2) Preheating: put the wood chips in step 1) into the drying chamber, heat the ambient temperature in the drying chamber to 42°C at a rate of 3°C per hour, and keep the ambient humidity in the drying chamber at 17%;

[0026] 3) Accelerated drying: adopt the combination of microwave heating and spraying water, within 18 minutes, the temperature of the wood chips is heated to 85 ° C, and the equilibrium moisture content of the wood chips at this time is 28%, and kept for 25 minutes; in this embodiment , the spray water method is water atomization, and the heating power of microwave is 1800W;

[0027] 4) Drying: a. By adjusting the heating power of the microwave, the temperature of the wood chips in...

Embodiment 2

[0031] A wood chip drying process, comprising the following steps:

[0032] 1) Pretreatment: remove the leaves and branches of the felled wood, then peel the wood, then slice the wood, and stack it according to the same specifications to obtain wood chips for subsequent use;

[0033] 2) preheating: the wood chips in step 1) are put into the drying chamber, and the ambient temperature in the drying chamber is heated to 50° C. at a heating rate of 5° C. per hour, and the ambient humidity in the drying chamber is maintained at 22%;

[0034] 3) Accelerated drying: use the combination of microwave heating and spraying water to heat the temperature of the wood chips to 60°C within 22 minutes, and make the equilibrium moisture content of the wood chips at this time 30% and keep it for 40 minutes; The heating power is specifically 2400W; the water spraying method is specifically water atomization;

[0035] 4) Drying: a. By adjusting the heating power of the microwave, the temperature...

Embodiment 3

[0039] A wood chip drying process, comprising the following steps:

[0040] 1) Pretreatment: remove the leaves and branches of the felled wood, then peel the wood, then slice the wood, and stack it according to the same specifications to obtain wood chips for subsequent use;

[0041] 2) Preheating: put the wood chips in step 1) into the drying chamber, heat the ambient temperature in the drying chamber to 45° C. at a rate of 4° C. per hour, and keep the ambient humidity in the drying chamber at 20%;

[0042] 3) Accelerated drying: use the combination of microwave heating and spraying water to heat the temperature of the wood chips to 75°C within 19 minutes, and make the equilibrium moisture content of the wood chips at this time 31% and keep it for 30 minutes; The heating power is 2200W, and the spray water method is water atomization;

[0043] 4) Drying: a. By adjusting the heating power of the microwave, the temperature of the wood chips in the drying chamber is reduced to ...

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Abstract

The invention discloses a wood chip drying process. The wood chip drying process comprises the following steps of (1) pretreating, (2) preheating, (3) accelerating drying, (4) baking, and (5) cooling. In the wood chip drying process, heat is not transferred from the surface of a wood chip, but penetrates through the interior of the wood chip through microwaves and is absorbed by contained moisture and the wood chip for direct heating, so that the drying speed is high. The wood chip is heated fully and thoroughly before drying, the temperature and the moisture containing ratio of the wood chip are increased firstly in the drying process, original moisture in the wood chip is easier to volatilize, and meanwhile, harmful bacteria in the wood chip can further be killed and the possibility of the corrosion of the wood chip is reduced. Compared with the prior art, the wood chip is dried through the process, therefore, the defects such as shrinkage, bending, crinkling, collapsing and deforming are not liable to occur, and the wood chip damage rate caused by improper drying is greatly decreased.

Description

technical field [0001] The invention belongs to the technical field of wood processing, in particular to a wood chip drying process. Background technique [0002] In recent years, with the continuous improvement of the economic level and the improvement of people's living standards, people's requirements for furniture are getting higher and higher, requiring furniture not only to be simple and practical, but also to meet the requirements of health and environmental protection. All kinds of furniture based on traditional wood-based panels have been gradually replaced by natural wood products due to their environmental protection, economy, and defects of non-natural products. The processing and production of wood-based panels requires multi-layer wood chips to be bonded and hot-pressed. Therefore, many natural woods need to be processed into wood chips before they can produce greater utilization value. The general processing technology of wood chips includes steps such as re...

Claims

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Application Information

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IPC IPC(8): F26B9/06F26B5/04F26B1/00
CPCF26B9/06F26B1/005F26B5/048F26B2210/14
Inventor 张松波
Owner 张松波
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