Low-energy-consumption method for preparing fiberboards by using bio-enzyme to separate fibers

A fiber separation and biological enzyme technology, which is applied in the field of materials to reduce energy consumption, promote rapid development, and reduce production costs.

Inactive Publication Date: 2014-02-26
SOUTHWEST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The excellent characteristics of wood materials are incomparable to any other materials, but the existing forest resources in our country are far from being able to meet people's living needs; wood-based panels ar

Method used

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  • Low-energy-consumption method for preparing fiberboards by using bio-enzyme to separate fibers
  • Low-energy-consumption method for preparing fiberboards by using bio-enzyme to separate fibers

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preparation example Construction

[0016] The fiberboard preparation method of low energy consumption bio-enzyme fiber separation according to the present invention includes raw material pretreatment, bio-enzyme pretreatment, fiber separation, dehydration and drying, pre-pressing, hot pressing, and post-processing steps, specifically including:

[0017] A. Raw material pretreatment: adjust the moisture content of raw wood, crop straw or bamboo to 30-50%, and crush it into wood chips, bamboo chips or crop straw scraps with a length of 1-2cm, a width of 2-3cm, and a thickness of 3-5mm for later use;

[0018] B. Biological enzyme pretreatment: add a biological enzyme solution with a solid-liquid ratio of 10 to 50 times to the pretreated raw materials for 5 to 120 minutes, and then add 10 to 50 times of ligninase for 5 to 120 minutes;

[0019] C. Fiber separation: the wood chips, bamboo chips or crop straw scraps pretreated by biological enzymes are separated by a disc mill;

[0020] D. Dehydration and drying: dehy...

Embodiment 1

[0035] Example 1 ——Preparation of eucalyptus fiberboard by separating fibers by biological enzyme method

[0036] Eucalyptus is used as the raw material of the board. It has been determined that the moisture content of eucalyptus raw materials is 8 to 10%, and the raw materials are humidified to control their moisture content to 40%. Use a chipper to make raw materials into wood chips with a length of 1-2cm, a width of 2-3cm, and a thickness of 3-5mm. The wood chips are placed in a solution of biological enzymes (pectinase and ligninase) at a temperature of 60°C. The concentration of the enzyme is 10%, the ratio of wood chips to solution is 30%, and the treatment time is 30 minutes; the treated wood chips or scraps are separated into fibers by a disc mill; the separated fibers are dehydrated, and then sizing and sizing The amount is 12% of the weight of the fiber, while adding 1% paraffin emulsion, and then drying the fiber to a moisture content of 8-10%. Lay the fibers afte...

Embodiment 2

[0037] Example 2 ——Biological enzymatic separation of fibers to prepare eucalyptus fiberboard

[0038] Repeat Example 1, with the following differences: first use a temperature of 50°C and a concentration of 20% pectinase solution for 10 minutes, then use a temperature of 60°C and a concentration of 10% ligninase solution for 10 minutes, wood chips and solution The ratio is 50%, and the test results are shown in Table 1.

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Abstract

The invention discloses a low-energy-consumption method for preparing fiberboards by using a bio-enzyme to separate fibers. The method includes making woody raw materials, crop straws or bamboo into wood chips or crushed aggregates, and utilizing the bio-enzyme for pretreatment under a certain condition; dissolving the bio-enzyme in water at the temperature of 20-60 DEG C, wherein concentration of the bio-enzyme is 0.05-50%, a proportion of the wood chips or the crushed aggregates and a bio-enzyme solution is 10-50%, and treatment time is 5-120min; utilizing a disc mill to further separate the wood chips, the crushed aggregates or bamboo chips into fibers to replace a mode that a hot-grinding method in a conventional fiberboard preparation process is utilized to separate fibers to prepare the fiberboards. A principle that the bio-enzyme can degrade pectin and lignin in a fiber intercellular layer is creatively utilized to separate the fibers, so that compared with the hot-grinding method, the method has the advantages of cleanliness, environment protection, low energy consumption and low cost. Reduction of energy consumption and production cost during producing of the fiberboards is facilitated, and the low-energy-consumption method has good social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the technical field of materials, and further belongs to the technical field of wood-based panel processing, and in particular relates to a fiberboard preparation method for low energy consumption biological enzyme fiber separation. Background technique [0002] The excellent characteristics of wood materials are incomparable to any other materials, but the existing forest resources in our country are far from being able to meet people's living needs; wood-based panels are an important way to save wood, so wood-based panels have gained popularity in my country. With rapid and rapid development, by 2005, my country has become the country with the largest wood-based panel production in the world. Fibreboard is an important type of wood-based panel, and its output is increasing at a rate of 40% every year. It is the fastest-growing wood-based panel type. The current output has reached more than 34 million m 3 / Year. Separation of...

Claims

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Application Information

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IPC IPC(8): B27N3/08
Inventor 杜官本李晓平李文均
Owner SOUTHWEST FORESTRY UNIVERSITY
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