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Bamboo bunch heat-moisture treatment method

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: 2016-05-11
NANJING FORESTRY UNIV
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  • Summary
  • 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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  • Bamboo bunch heat-moisture treatment method

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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 5mm thick bamboo strips, it is decomposed into bamboo bundles with a diameter of 1.5mm 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 o...

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 3mm thick bamboo strips, it is decomposed into bamboo bundles with a diameter of 3mm 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 hours. After that, the b...

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Abstract

The invention provides a bamboo bunch heat-moisture treatment method. A bamboo bunch is treated through a pressure tank, and the pressure tank is put in hot oil, so that the airtight effect of a heat treatment process is guaranteed; the heat treatment temperature can be controlled in a range between 125 DEG C to 250 DEG C, so that protein, pectin and low-carbon sugar in bamboo wood are fully degraded and the dimensional stability, corrosion resistance, mildew resistance and other properties of products are improved; a hot oil pool is adopted so that the effect that the temperature is kept consistent all the time in the heat treatment process can be guaranteed, accordingly the uniformity of bamboo bunch heat treatment is improved, the color and luster of the treated bamboo bunch are uniform, and the defect of product color difference is reduced; a fresh bamboo bunch is utilized and directly subjected to heat treatment, and drying is not needed before heat treatment for the bamboo bunch, so that the energy consumption is reduced; in the heat treatment process, moisture in the fresh bamboo bunch is rapidly evaporated and a damp and hot medium is formed, so that the heat conduction efficiency is improved, oxygen content in the medium is decreased by the aid of produced water steam, and spontaneous ignition cannot occur even though the heat treatment temperature reaches 250 DEG C; and the temperature of oil in the oil pool does not need to be decreased, so that the energy consumption is reduced and the heat treatment efficiency is improved.

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 Applications(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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