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Equipment for promoting heat and water transfer on surface of wood

A wood surface and wood technology, applied in the wood drying process to promote wood heat and moisture transfer, wood drying equipment and drying fields, can solve problems such as high energy consumption, moisture and heat transfer obstacles, and long drying cycles

Inactive Publication Date: 2018-11-13
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to increase the drying rate of wood, these methods have largely improved the permeability of wood, thereby increasing the drying rate of wood. The transmission also plays a great role in hindering, making the drying cycle longer and energy consumption higher. Ultrasonic waves can promote the transfer of heat and moisture on the wood surface, eliminate the thin layer of heat and mass transfer on the wood surface, and accelerate the drying of the moisture on the wood surface. It moves in the medium and promotes the rapid transfer of heat to the wood surface, which has a great effect on reducing drying energy consumption and shortening the drying cycle

Method used

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  • Equipment for promoting heat and water transfer on surface of wood
  • Equipment for promoting heat and water transfer on surface of wood
  • Equipment for promoting heat and water transfer on surface of wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] 1. Pretreatment of wood to be dried

[0130] The Chinese fir raw wood is made into a thickness of 2-6cm, preferably 4cm; a length of 6-7.9m, preferably 7.5m, to be dried, and it is set aside; wherein, the thickness of the Chinese fir board is the same.

[0131] 2. Feeding

[0132] The wood is placed on the rollers at the input end of the roller conveyor of the wood transport device through the wood loading and unloading device. The electric switch set between the two rollers at the input end of the roller conveyor is pressed by the wood and turned on, and the driving motor is started to drive the rollers to run. The wood is transported into the drying room from the entrance door on the left side of the drying room. When the wood enters the drying room through the entrance door, the wood blocks the infrared rays of the infrared transmitter A of the infrared monitor A installed on both sides of the entrance door, resulting in The infrared receiver A cannot receive the in...

Embodiment 2

[0146] 1. Pretreatment of wood to be dried

[0147] The Chinese fir raw wood is made into a thickness of 4cm; the length is 7.5m to be dried, and it is set aside; wherein, the thickness of the Chinese fir board is the same.

[0148] 2. Measure the dry and wet bulb temperature of the drying medium, and calculate the relative humidity of the drying medium (ψ 介 )

[0149] The wood is automatically sent into the drying kiln through the transport device. When the infrared receiver A of the infrared monitor A can receive the signal from the transmitter A, the drive motor is turned off through the automatic control system, and the wood stops moving forward. At the same time, the heater and circulation are turned on. The fan heats the wood in the drying kiln, and controls the temperature of the drying medium in the drying kiln to be 50°C; and measures the dry and wet bulb temperatures of the drying medium in the drying kiln through the temperature sensor 51 installed in the center of...

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Abstract

The invention discloses equipment for promoting heat and water transfer on the surface of wood. The equipment comprises an ultrasonic treatment device for ultrasonically treating the surface of wood placed in a drying room. The ultrasonic treatment device treats the surface of the wood in the wood drying process ultrasonically. In the wood drying process, ultrasonic waves can promote the transfereffect of heat and water on the surface of the wood and eliminate a heat mass transfer thin layer on the surface of the wood to further accelerate the water on the surface of the water to move towarda drying medium, so that heat is promoted to be quickly transferred to the surface of the wood. The equipment plays a huge role of reducing the drying energy consumption and shortening the drying period. The equipment and method provided by the invention can achieve a continuous drying process of the wood and an energy-saving drying process of the wood.

Description

technical field [0001] The invention relates to a wood drying device and a drying method, in particular to a device and a method for promoting wood heat and water transfer during the wood drying process, and belongs to the field of wood thermal processing. Background technique [0002] Wood drying is an important link in the wood product processing process, and its energy consumption accounts for 40-70% of the wood product processing process. Improving wood drying efficiency and reducing drying energy consumption have become urgent problems in the wood processing industry. At present, in order to improve the drying rate of wood, the invention patent 201410424968.7 provides a treatment device for improving the drying rate of wood and a method for drying wood by using the device. The present invention discloses a pretreatment device and a treatment method for improving the drying rate of wood. The device includes a wood treatment chamber with a cavity inside, an ultrasonic tre...

Claims

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Application Information

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IPC IPC(8): F26B15/12F26B5/02F26B7/00F26B21/00F26B25/00F26B25/22
Inventor 何正斌伊松林钱京王振宇曲丽洁李金朋
Owner BEIJING FORESTRY UNIVERSITY
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