Continuous wood modification heat treatment process and system

Abstract

The invention provides a continuous wood modification heat treatment process. The process comprises the following steps: stacking initial wood blanks on a trolley at intervals, applying pressure to the tops of the initial wood blanks to enable all the positions of the initial wood blanks to be stressed evenly and kept flat, and sequentially performing the following treatment steps of preheating treatment, heating treatment, drying treatment, carbonization treatment, slow cooling treatment, rapid cooling treatment and rewetting treatment. Each treatment step comprises a plurality of kilns, thekilns in the steps S2-S4 are arranged in an equal-gradient heating mode, and the kilns in the steps S5-S7 are arranged in an equal-gradient cooling mode. The invention provides a continuous wood modification heat treatment system. The continuous wood heat treatment system comprises a plurality of kilns, a trolley, a transmission device for driving the trolley to move, and a microwave and other heat source heating device. The process and the system provided by the invention provide high-quality wood which is low in energy consumption, short in production period, uniform and consistent in carbonization degree of the interior and the surface, high in strength and stable in performance, and the system is low in production cost and suitable for mass production.

Description

technical field

[0001] The invention relates to the technical field of wood processing, in particular to a continuous wood modification heat treatment process and system. Background technique

[0002] Wooden materials are derived from nature, and are loved by people because of their natural texture and beautiful color. Due to the biological properties and various characteristics of wood, wood is prone to shrinkage and swelling when the external humidity and heat conditions change, and it is a material with unstable dimensions. This property has an adverse effect on the utilization of wood. The wood cut from trees has a high internal moisture content. If it is directly processed into a board, it is easy to cause the water inside the board to evaporate after the board is heated in the subsequent use process, resulting in depression or cracking of the board. , or the board directly made of fresh wood will cause the cell wall in the board to absorb water and expand after encoun...

Examples

Embodiment 1

[0093] Take the oak wood floor blank as an example:

[0094] A continuous wood modification heat treatment process. The initial wood blanks are stacked on the trolley at intervals, and pressure is applied on the top to keep the blanks balanced and flat. The following processing steps are followed in sequence:

[0095] S1. Preheating treatment: move the trolley carrying the initial wood blank to the preheating kiln, and the preheating temperature is 30°C;

[0096] S2. Heating treatment: move the initial wood blank after S1 treatment to the heating kiln. The heating treatment includes two heating kilns with temperatures of 80°C and 100°C respectively; in S2 treatment, the microwave power accounts for the total heating power The ratio is 30%, the water vapor flow rate is 2m3 / h, and the humidity is 50%.

[0097] S3. Drying treatment: Drying treatment includes two steps. The first step is to move the initial wood blank after S1 treatment to the first drying kiln, and the drying tr...

Embodiment 2

[0110] Take oak wood floor blank as an example:

[0111] A continuous wood modification heat treatment process. The initial wood blanks are stacked on the trolley at intervals, and pressure is applied on the top to keep the blanks balanced and flat. The following processing steps are followed in sequence:

[0112] S1. Preheating treatment: move the trolley carrying the initial wood blank to the preheating kiln, and the preheating temperature is 50°C;

[0113] S2, heating treatment: move the initial wood blank after S1 treatment to the heating kiln, the heating treatment includes 2 heating kilns, the temperature is 60°C and 80°C respectively; in S2 treatment, the proportion of microwave power is 35% , the water vapor flow rate is 5m3 / h, and the humidity is 100%.

[0114] S3. Drying treatment: Drying treatment includes two steps. The first step is to move the initial wood blank after S1 treatment to the first drying kiln, and the drying treatment temperature is 100°C. The init...

Embodiment 3

[0126] Take the oak wood floor blank as an example:

[0127] A continuous wood modification heat treatment process. The initial wood blanks are stacked on the trolley at intervals, and pressure is applied on the top to keep the blanks balanced and flat. The following processing steps are followed in sequence:

[0128] S1. Preheating treatment: move the trolley carrying the initial wood blank to the preheating kiln, and the preheating temperature is 40°C;

[0129] S2, heating treatment: move the initial wood blank after S1 treatment to the heating kiln, the heating treatment includes 2 heating kilns, the temperature is 70°C and 90°C respectively; in S2 treatment, the microwave power accounts for 38% , the water vapor flow rate is 4m3 / h, and the humidity is 100%.

[0130]S3. Drying treatment: Drying treatment includes two steps. The first step is to move the initial wood blank after S1 treatment to the first drying kiln, and the drying treatment temperature is 110°C. The initi...

technical field

[0001] The invention relates to the technical field of wood processing, in particular to a continuous wood modification heat treatment process and system. Background technique

[0002] Wooden materials are derived from nature, and are loved by people because of their natural texture and beautiful color. Due to the biological properties and various characteristics of wood, wood is prone to shrinkage and swelling when the external humidity and heat conditions change, and it is a material with unstable dimensions. This property has an adverse effect on the utilization of wood. The wood cut from trees has a high internal moisture content. If it is directly processed into a board, it is easy to cause the water inside the board to evaporate after the board is heated in the subsequent use process, resulting in depression or cracking of the board. , or the board directly made of fresh wood will cause the cell wall in the board to absorb water and expand after encoun...

Examples

Embodiment 1

[0093] Take the oak wood floor blank as an example:

[0094] A continuous wood modification heat treatment process. The initial wood blanks are stacked on the trolley at intervals, and pressure is applied on the top to keep the blanks balanced and flat. The following processing steps are followed in sequence:

[0095] S1. Preheating treatment: move the trolley carrying the initial wood blank to the preheating kiln, and the preheating temperature is 30°C;

[0096] S2. Heating treatment: move the initial wood blank after S1 treatment to the heating kiln. The heating treatment includes two heating kilns with temperatures of 80°C and 100°C respectively; in S2 treatment, the microwave power accounts for the total heating power The ratio is 30%, the water vapor flow rate is 2m3 / h, and the humidity is 50%.

[0097] S3. Drying treatment: Drying treatment includes two steps. The first step is to move the initial wood blank after S1 treatment to the first drying kiln, and the drying tr...

Embodiment 2

[0110] Take oak wood floor blank as an example:

[0111] A continuous wood modification heat treatment process. The initial wood blanks are stacked on the trolley at intervals, and pressure is applied on the top to keep the blanks balanced and flat. The following processing steps are followed in sequence:

[0112] S1. Preheating treatment: move the trolley carrying the initial wood blank to the preheating kiln, and the preheating temperature is 50°C;

[0113] S2, heating treatment: move the initial wood blank after S1 treatment to the heating kiln, the heating treatment includes 2 heating kilns, the temperature is 60°C and 80°C respectively; in S2 treatment, the proportion of microwave power is 35% , the water vapor flow rate is 5m3 / h, and the humidity is 100%.

[0114] S3. Drying treatment: Drying treatment includes two steps. The first step is to move the initial wood blank after S1 treatment to the first drying kiln, and the drying treatment temperature is 100°C. The init...

Embodiment 3

[0126] Take the oak wood floor blank as an example:

[0127] A continuous wood modification heat treatment process. The initial wood blanks are stacked on the trolley at intervals, and pressure is applied on the top to keep the blanks balanced and flat. The following processing steps are followed in sequence:

[0128] S1. Preheating treatment: move the trolley carrying the initial wood blank to the preheating kiln, and the preheating temperature is 40°C;

[0129] S2, heating treatment: move the initial wood blank after S1 treatment to the heating kiln, the heating treatment includes 2 heating kilns, the temperature is 70°C and 90°C respectively; in S2 treatment, the microwave power accounts for 38% , the water vapor flow rate is 4m3 / h, and the humidity is 100%.

[0130]S3. Drying treatment: Drying treatment includes two steps. The first step is to move the initial wood blank after S1 treatment to the first drying kiln, and the drying treatment temperature is 110°C. The initi...

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