A kind of wet heat treatment method for bamboo bundles

A wet heat treatment, bamboo bunching technology, applied in reed/straw treatment, wood processing utensils, manufacturing tools, etc., can solve the problems of limited improvement in dimensional stability, mildew resistance and other properties of reconstituted bamboo, low steam treatment temperature, and high risk , to reduce product chromatic aberration defects, improve uniformity, uniform color effect

Active Publication Date: 2017-09-29
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing heat treatment process has played a certain role in improving the properties of recombined bamboo, but there are also the following problems: the steam treatment temperature is low, generally below 135 ° C, and the dimensional stability and mildew resistance of recombined bamboo have limited improvement; However, in dry air heat treatment, improper operation during the treatment process is prone to material combustion, which is highly dangerous, and the exhaust gas after heat treatment will pollute the atmosphere and other defects.

Method used

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  • A kind of wet heat treatment method for bamboo bundles

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Embodiment

[0014] The equipment used in the bamboo bundle heat treatment equipment of the present invention comprises a pressure tank (1) and an oil pool (3), comprising the following steps: (1) preparation of bamboo bundles, (2) heat treatment of bamboo bundles, (3) drying of bamboo bundles,

[0015] (1) Bamboo bundle preparation:

[0016] After the fresh bamboo is processed into 5 mm thick bamboo strips, it is decomposed into bamboo bundles with a diameter of 1.5 mm fiber bundles by using a decomposer;

[0017] (2) Bamboo bundle heat treatment

[0018] Put the bamboo bundles into the pressure tank (1) in parallel or crosswise along the direction of the grain, and after closing the door of the pressure tank, let in saturated steam to rapidly raise the temperature of the medium in the pressure tank to 100-120°C. When the pressure reaches 0.10-0.12MPa, put the bamboo bundles together with the pressure tank (1) into the oil pool (3) for heat treatment, in this process ensure that the hot ...

Embodiment 2

[0022] The equipment used in the bamboo bundle heat treatment equipment of the present invention comprises a pressure tank (1) and an oil pool (3), comprising the following steps: (1) preparation of bamboo bundles, (2) heat treatment of bamboo bundles, (3) drying of bamboo bundles,

[0023] (1) Bamboo bundle preparation:

[0024] After the fresh bamboo is processed into 3 mm thick bamboo strips, it is decomposed into bamboo bundles with a diameter of 3 mm fiber bundles by using a decomposer;

[0025] (2) Bamboo bundle heat treatment

[0026] Put the bamboo bundles into the pressure tank (1) in parallel or crosswise along the grain direction, close the pressure tank door; put the bamboo bundles together with the pressure tank (1) into the oil pool (3) for Heat treatment, in this process, ensure that the hot oil (2) submerges the entire tank body of the pressure tank, the temperature of the hot oil (2) in the oil pool is 200°C, and the treatment time is 5 h, after that, the bam...

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Abstract

A kind of wet heat treatment method for bamboo bundles provided by the present invention uses a pressure tank to treat bamboo bundles, and puts the pressure tank into hot oil to ensure the airtightness of the heat treatment process, and the heat treatment temperature can be controlled at 125°C-250°C, so that The full degradation of protein, pectin and low-carbon sugar helps to improve the product's dimensional stability, anti-corrosion and anti-mildew properties; the use of hot oil pool can ensure that the temperature is always consistent during the heat treatment process, which improves the quality of the bamboo. The uniformity of bundle heat treatment, the treated bamboo bundles are even in color, reducing product color defects; using fresh bamboo bundles for direct heat treatment, bamboo bundles do not need to be dried before heat treatment, reducing energy consumption, during the heat treatment process, the moisture in fresh bamboo bundles quickly Evaporate to form a hot and humid medium, which improves the heat transfer efficiency, and the produced water vapor reduces the oxygen content in the medium, and will not spontaneously ignite even if the heat treatment temperature reaches 250°C; the oil temperature in the oil pool does not need to be cooled, which reduces energy consumption and improves heat treatment efficiency.

Description

technical field [0001] The invention relates to a heat treatment process for bamboo bundles, which is suitable for modifying bamboo bundles so as to improve the dimensional stability, weather resistance and corrosion resistance of recombined bamboo materials prepared from bamboo bundles. Background technique [0002] Recombined bamboo, also known as heavy bamboo, is a new bamboo material that reorganizes and strengthens bamboo bundles. It has become one of the mainstream products in the bamboo industry. Heat treatment of bamboo bundles can effectively change the final product. It can also improve the dimensional stability and mildew resistance of the board, which is one of the main ways to increase the value of recombined bamboo. The current heat treatment process mainly includes two types: one is steam treatment, and the equipment used is a pressure tank; the other is dry air treatment, and the equipment used is a drying kiln. The existing heat treatment process has played...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K9/00
CPCB27K9/002
Inventor 许斌李延军程大莉何文张晓冬梁星宇
Owner NANJING FORESTRY UNIV
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