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A method and equipment for wood carbonization treatment with atmospheric pressure superheated steam

A superheated steam and carbonization technology, applied in wood treatment, wood heat treatment, wood treatment details, etc., can solve the problems of slow carbonization, difficult wood carbonization, uneven carbonization, etc., to achieve fast carbonization speed, low steam pressure, and difficult The effect of spontaneous combustion

Active Publication Date: 2022-03-22
赖世成 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the currently disclosed wood carbonization technologies use hot air to carbonize wood. Hot air carbonization is difficult to achieve deep carbonization of wood, and the carbonization speed is slow and uneven.

Method used

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  • A method and equipment for wood carbonization treatment with atmospheric pressure superheated steam
  • A method and equipment for wood carbonization treatment with atmospheric pressure superheated steam
  • A method and equipment for wood carbonization treatment with atmospheric pressure superheated steam

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Atmospheric pressure superheated steam with a temperature greater than 230°C is used as the heat medium, and the superheated steam directly contacts the dry wood in the carbonization tank for heat exchange carbonization. The steps are as follows:

[0071] The first stage: Stack the wood with a moisture content of <25% after drying or natural drying in the carbonization tank, and close the airtight door of the carbonization tank; the wood is a plate or square material with a thickness of 25mm to 150mm after opening. Stacking requirements: the wood to be processed is stacked on the timber cart, the length and width of the timber pile are equal to the length and width of the timber cart, the height should be able to push the kiln door, and a square of 25×25mm should be used between the two layers of boards. Separated by spacers, heavy objects should be placed on the upper part of the pile or fixed with splints to avoid heat deformation.

[0072] The second stage: input sup...

Embodiment 2

[0086] Atmospheric pressure superheated steam with a temperature greater than 230°C is used as the heat medium, and the superheated steam directly contacts the dry wood in the carbonization tank for heat exchange carbonization. The steps are as follows:

[0087] The first stage: Stack the wood with a moisture content of <25% after drying or natural drying in the carbonization tank, and close the airtight door of the carbonization tank; the wood is a plate or square material with a thickness of 25mm to 150mm after opening. Stacking requirements: the wood to be processed is stacked on the timber cart, the length and width of the timber pile are equal to the length and width of the timber cart, the height should be able to push the kiln door, and a square of 25×25mm should be used between the two layers of boards. Separated by spacers, heavy objects should be placed on the upper part of the pile or fixed with splints to avoid heat deformation.

[0088] The second stage: Turn on t...

Embodiment 3

[0104] Atmospheric pressure superheated steam with a temperature greater than 230°C is used as the heat medium. The superheated steam directly contacts the wet wood in the carbonization tank for heat exchange and carbonization. The wet wood is wood that has not been dried or dried naturally. The steps are as follows:

[0105] The first stage: push and stack the wood into the tank, close the sealed door of the carbonization tank; the wood is a plate or square material with a thickness of 25mm to 150mm, and the stacking requirements of the wood: the wood to be processed is stacked on the material On the cart, the length and width of the wood pile are equal to the length and width of the wood cart, and the height should be able to push the kiln door. The two layers of boards should be separated by 25×25mm square spacers. Objects or fixed with splints to avoid thermal deformation.

[0106] The second stage: After loading the stacked wood in the carbonization tank, turn on the vacu...

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Abstract

A method and equipment for carbonizing wood with atmospheric pressure superheated steam; it uses normal pressure superheated steam with a temperature greater than 230°C as the heat medium, and the superheated steam directly contacts the wood stacked in the carbonization tank for heat exchange Carbonization, easy to achieve deep carbonization of wood, fast carbonization speed, high efficiency, no oxidation and discoloration, reduced cracks and warping, no stains and mildew. Atmospheric pressure superheated steam is used as the heat medium, the steam pressure at normal pressure is low, the safety of the equipment is high, the water content of the steam is greater than the equilibrium water content of the wood, the carbonization process is not easy to spontaneously ignite, and the fire safety is high.

Description

technical field [0001] The invention relates to the technical field of thermal modification treatment of wood, in particular to a method and equipment for wood carbonization treatment with normal pressure superheated steam. Background technique [0002] Wood is mainly composed of cellulose and hemicellulose. Cellulose acts as a skeleton in the wood cell wall, and its chemical properties and supramolecular structure have an important impact on the strength of wood. The hydroxyl groups in cellulose and water molecules can also form hydrogen bonds, and the hydrogen bonds between the hydroxyl groups in different parts directly affect the moisture absorption and desorption process of wood. A large number of hydrogen bonds can improve the strength of wood, reduce hygroscopicity, reduce chemical reactivity, etc., and the hygroscopicity of cellulose directly affects the dimensional stability and strength of the limit. After the wood is carbonized, the concentration of hydroxyl grou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M1/08B27M1/06B27K5/00
CPCB27M1/08B27M1/06B27K5/009
Inventor 赖世成李俊李小平赖永裕
Owner 赖世成
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