Production method of carbonized wood

A production method and technology for carbonizing wood, applied in the direction of burning charcoal/combustion, etc., can solve problems such as unfavorable environmental protection and increased cost, and achieve the effects of being beneficial to environmental protection, short treatment period, and high utilization rate of heat energy.

Inactive Publication Date: 2010-03-10
NORTHEAST FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of using nitrogen as a protective gas in the existing carbonized wood production process, resulting in increased

Method used

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  • Production method of carbonized wood

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 Illustrate present embodiment, present embodiment is realized by following steps: one, several pieces of dry timber 15 that need to be processed are stacked on the support steel beam 6 in the carbonization treatment kiln 1 from bottom to top, between each piece of timber 15 The distance between them is consistent with the thickness of the wood 15 to meet the uniform flow of hot air from bottom to top; 2. Close the kiln door of the carbonization treatment kiln 1, open the air inlet 1-1 and the exhaust hole 1-2; 3. Ignite and burn The biomass material in the chamber 1-3, the hot air current that the biomass material after burning produces directly the wood 15 in the carbonization treatment kiln 1 is heated; The size of the exhaust hole 1-2 is controlled at 15-20° C. / h to adjust the heating rate of the inner chamber of the carbonization treatment kiln 1. During the heating process, water vapor is intermittently sprayed to ...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination figure 1 To illustrate this embodiment, the biomass material in Step 3 of this embodiment is sawdust or crushed straw. Biomass materials come from a wide range of sources, such as waste from wood processing, wood chips left after wood processing, straw left over from harvesting various crops, and various biomass materials in nature can be used for it, expanding the biomass The scope and field of material utilization; the effective utilization of biomass materials in the method of the present invention reduces the demand for coal to a certain extent, which is in line with the national policy of energy conservation and emission reduction; carbonized wood is produced by utilizing the heat and gas generated by the combustion of biomass materials, It has truly achieved turning waste into treasure. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0009] Specific implementation mode three: combination figure 1 To describe this embodiment, the temperature rise rate of the inner cavity of the carbonization treatment kiln 1 in Step 4 of this embodiment is controlled at 18° C. / h. This heating rate can ensure that the wood will not be deformed during the heat treatment. Other steps are the same as in the first embodiment.

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Abstract

The invention discloses a production method of carbonized wood, relating to a production method of wood and solving the problems that the existing production of the carbonized wood has high cost due to adoption of nitrogen as protective gas, exhausts CO2 and is not environment-friendly when in burning due to adoption of coal as fuel. The method comprises the following steps: (1) the wood is stacked on a support steel beam in a carbonization treating kiln from down to up; (2) a kiln door is closed and a gas inlet and a gas outlet are opened; (3) a biomass material is ignited; (4) the temperature-rising speed is 15 to 20 DEG C/h, and intermittent steam-spraying is carried out to the wood; (5) when the temperature in the kiln rises to 180 to 230 DEG C, mixed gas of carbon dioxide and nitrogenin the kiln forms a flame-retardant oxygen-separation layer between the wood and a combustion chamber; (6) the temperature of the wood is kept for 3.5 to 4.5 hours; (7) the gas inlet and the gas outlet are opened, and the water content of the wood is 4 to 8 percent; and (8) when the temperature in the kiln is reduced to 40 to 60 DEG C, the wood is taken out, namely, a carbonized wood finished product. The production method of carbonized wood uses biomass as fuel, and does not add chemical medicament, and the produced carbonized wood has no pollution and is beneficial to environment protection.

Description

technical field [0001] The invention relates to a method for producing wood. Background technique [0002] Wood is a natural material. Compared with other materials, it is renewable and processable, and it is widely used in building materials, furniture and other fields. However, wood also has many disadvantages. For example, when wood is used, it will exchange moisture with the surrounding environment, resulting in shrinkage and swelling, which will cause deformation and cracking of wood products; wood is the food of many fungi and insects, so wood products are easy to Moldy, insects, and the exhaust gas generated by the combustion of a large amount of biomass materials cannot be used to pollute the environment. In the current carbonized wood production process, most of them are produced by using traditional wood drying kilns and ultra-high temperature heat treatment equipment. Since the wood needs to be cooled to a certain temperature after being dried in the drying kiln,...

Claims

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Application Information

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IPC IPC(8): B27M1/06
Inventor 李坚孙伟伦
Owner NORTHEAST FORESTRY UNIVERSITY
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