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Eucalypt artificial wood drying method

A wood drying and artificial forest technology, applied in the field of eucalyptus wood drying, can solve the problems affecting the quality of eucalyptus wood, and achieve the effect of avoiding shrinkage and ensuring quality

Inactive Publication Date: 2009-06-10
国际竹藤网络中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shrinkage of eucalyptus wood is often found during the drying process of eucalyptus, which seriously affects the quality of eucalyptus wood

Method used

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  • Eucalypt artificial wood drying method
  • Eucalypt artificial wood drying method
  • Eucalypt artificial wood drying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Material selection, eucalyptus of different tree species and sawn timber of different thicknesses should be dried separately. When the number of wood is less than one kiln, it is allowed to dry tree species with similar drying characteristics and initial moisture content in the same kiln;

[0017] (2) Measure the initial moisture content, check the sawn timber to obtain the moisture content, and the sawn timber with different moisture content should be dried separately;

[0018] (3) For stacking, it is necessary to ensure the reasonable circulation of air flow in the kiln, make full use of the capacity of the kiln, and prevent wood warping and end cracking. The length, width and height of the pile should meet the design requirements of the drying kiln. When the amount of wood is less than one kiln, the width of the pile is allowed to be reduced, but the pile should be stable during operation. For forced circulation kilns, the sides of each layer of materials should ...

Embodiment 2

[0054] The difference from Example 1 is the drying standard, and the others are the same, so they will not be repeated.

[0055] Benchmarks for eucalyptus drying include:

[0056] (1) Preheating of sawn timber, keeping the dry bulb temperature in the kiln at 50°C and the wet bulb temperature at 49.5-50°C for 3 hours;

[0057] (2) At the stage of 30% moisture content of sawn timber, keep the dry bulb temperature in the kiln at 60°C and the wet bulb temperature at 59°C for 3 hours;

[0058] (3) At the stage of 20% moisture content of the sawn timber, keep the dry bulb temperature in the kiln at 70°C and the wet bulb temperature at 68°C, and perform intermediate treatments for 2-3 times, each time for 3 hours;

[0059] (4) At the stage of 8-10% moisture content of the sawn timber, carry out final treatment, keep the dry bulb temperature in the kiln at 80°C, and the wet bulb temperature at 74°C, shrinkage recovery treatment for 3 hours, and maintain for 5 hours.

[0060] The spe...

Embodiment 3

[0064] The difference from Example 1 is the drying standard, and the others are the same, so they will not be repeated.

[0065] Eucalyptus giant drying benchmarks include:

[0066] (1) Preheating of sawn timber, keeping the dry bulb temperature in the kiln at 55°C and the wet bulb temperature at 54-55°C for 3 hours;

[0067] (2) At the stage of 30% moisture content of the sawn timber, keep the dry bulb temperature in the kiln at 68°C and the wet bulb temperature at 67°C for 3 hours;

[0068] (3) At the stage of 20% moisture content of sawn timber, keep the dry bulb temperature in the kiln at 65°C and the wet bulb temperature at 63°C, and perform intermediate treatment for 2-3 times, each time for 3 hours;

[0069] (4) At the stage of 8-10% moisture content of the sawn timber, carry out final treatment, keep the dry bulb temperature in the kiln at 75°C, and the wet bulb temperature at 69°C, shrinkage recovery treatment for 3 hours, and maintain for 5 hours.

[0070] The spec...

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Abstract

The invention belongs to a timber drying method for eucalyptus planted forests. The method comprises the following steps: selecting materials; measuring initial moisture content, in which, sawtimbers are detected to obtain moisture contents and the sawtimbers of different moisture contents are respectively dried; stacking, in which, reasonable circulation of airflow inside a kiln is ensured and the capacity of the kiln is fully utilized to prevent timber warping and end checking; placing a moisture content check plate inside the kiln, in which, the moisture content check plate of dried timber inside the same kiln is determined according to requirements to check the moisture content of the check plate; and controlling the temperature and humidity inside the kiln according to the drying standards of different eucalyptus species. The timber drying method has the advantages of preventing eucalypti from crimpling in the process of drying and ensuring drying quality of eucalypti.

Description

technical field [0001] The invention belongs to the technical field of eucalyptus wood drying. Background technique [0002] Eucalyptus is a native tree species in Australia, with more than 800 species, rapid growth, strong adaptability, high wood yield, and large differences in wood properties between species and regions. In recent years, it has been introduced and cultivated by many countries in the world, and the global eucalyptus plantation area has reached 50 million hectares. [0003] After the founding of the People's Republic of my country, eucalyptus was introduced in southern China, and the current eucalyptus plantation area reaches 1.5 million hectares. With the rapid growth of the global economy and the increasing shortage of timber resources, all countries are adjusting their forestry industry policies. Most countries have shifted the production of eucalyptus wood that was only used for pulp production to solid wood processing in order to increase the added val...

Claims

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Application Information

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IPC IPC(8): B27K1/00
Inventor 江泽慧王喜明高瑞清于文吉孙正军
Owner 国际竹藤网络中心
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