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0805-2023
Significance of wood drying
Wood drying is the process of heating the wood under the condition of controlling the medium temperature and relative humidity, so that the internal moisture of the wood moves to the surface, the surface moisture evaporates to the outside, and the process of gradually removing moisture from the wood. In order to achieve effective drying quality, it is necessary to control the temperature and humidity of the drying medium, and adopt a reasonable drying process and operation method. The more common method used at present is the method of convection drying.So what are the benefits of drying wood? There are mainly the following aspects:
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2903-2023
Classification and use of carbonized wood
Classification According to the performance and application of the product, carbonized wood can be divided into two categories: indoor use and outdoor use. In addition to the requirements for appearance quality, the former mainly requires dimensional stability. The tangential swelling and drying shrinkage of the wood is required to be 6-8%, and its corrosion resistance level is required to be grade Ⅲ—slight corrosion resistance; the latter, in addition to In addition to the requirements for appearance quality, the main performance requirement is biological corrosion resistance, and its corrosion resistance level is required to be level II—corrosion resistance. In addition, the chordwise swelling and drying shrinkage of wood are required to be 5-6%.
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0603-2023
Defects and Prevention of Wood Carbonization
When wood is carbonized, if the process or operation is improper, many defects will occur, mainly including cracking, deformation, uneven color, knot falling off, and even fire. However, if the causes of these defects are mastered, basically these defects can be prevented.
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0802-2023
Principles and principles of wood drying
Fundamentals of Wood Drying Through the above introduction, we already know that the moisture in wood is mainly composed of two kinds of moisture, that is, free water and absorbed water. The moisture existing in the large capillary system composed of cell lumens is called free water, and its increase or decrease only affects the weight of wood, but not the properties of wood; the moisture existing in the microcapillary system composed of cell walls is called absorbed water. Its changes not only cause the wood to shrink and expand, but also affect other physical and mechanical properties of the wood.
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1601-2023
Overview of Wood Drying Process Control
The control of the wood drying process is a very important part of the drying process. It is directly related to the quality of the wood drying. Good control is the organic combination of the operator and the control equipment. Otherwise, no matter how advanced the control system is without the correct operation of the operator, it will be No practical effect.
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1101-2023
Parameters during wood drying
The most important thing in the wood drying process is to make the parameters in the drying equipment as close as possible to the drying benchmark. The most important parameters in the wood drying benchmark are wood moisture content, air temperature and humidity.
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2612-2022
Matters needing attention when piles or trucks enter the drying room
(1) The wood to be dried in the same drying room must have the same species or similar material properties, the same thickness, and the initial moisture content is basically the same. (2) Be careful not to damage the door, wall and indoor equipment when loading materials. The materials should be parked or stacked stably and neatly.
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2112-2022
Evaluation of Wood Drying Benchmarks
According to the drying quality and drying time of the dried wood, the performance of the drying standard can be evaluated, and the following three indicators are used to evaluate the use effect of the drying standard.
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2208-2022
Overview of three methods of wood drying and evaluation of their advantages and disadvantages
There are many ways to dry wood. According to the way the moisture is discharged from the wood, it is divided into three types: thermal drying, mechanical drying and chemical drying.
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1107-2022
The basic concept of wood drying(1)
What are the basic concepts of wood drying, do you know?