Volatile organic compound (VOC) collecting system and method used in wood heat treatment process

A technology of wood heat treatment and collection system, which is applied in the field of VOC collection system in the wood heat treatment process to achieve the effect of moderate price

Active Publication Date: 2016-12-07
BEIJING FORESTRY UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a collection system and method for wood VOC in the high-temperature heat t

Method used

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  • Volatile organic compound (VOC) collecting system and method used in wood heat treatment process
  • Volatile organic compound (VOC) collecting system and method used in wood heat treatment process
  • Volatile organic compound (VOC) collecting system and method used in wood heat treatment process

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0140] Example 1 Determination of the moisture content of the specimens of Pinus sylvestris to be heat-treated

[0141] 1. According to the national sampling standard (GT28281-2003), 4 specimens were taken from the Pinus sylvestris specimens with a size of 25cm (length) × 10cm (width) × 1cm (thickness), and then from the sampled Pinus sylvestris wood A 3~4cm test piece is cut from the end along the length of the test piece to determine the moisture content of the wood (called the moisture content test piece);

[0142] 2. Weigh the initial weight of the moisture content test piece respectively, then put the moisture content test piece into the oven and bake it to absolute dryness at 103℃, and weigh the absolute dry weight of the moisture content test piece after cooling to determine its average moisture content Rate: 9.28%.

[0143] In the present invention, except for the moisture content of the wood of 9.28%, all woods with a moisture content of 8-12% are applicable.

Example Embodiment

[0144] Example 2

[0145] 1) Determine the initial weight of the wood to be heat treated

[0146] Randomly select 3 specimens of Pinus sylvestris with dimensions of 25cm (length) × 10cm (width) × 1cm (thickness) for high temperature heat treatment, weigh the initial weights of the 3 specimens, and calculate the average initial weight as 167.73g;

[0147] In addition to 3 pieces of wood as an example, other quantities such as 1-10 pieces are also applicable to the present invention, and the wood quantity is preferably 2-5 pieces.

[0148] 2) Wood heat treatment and VOC collection

[0149] 2-1) Open the closed door of the high temperature heat treatment chamber (not marked in the figure), and place the weighed wood to be heat treated on the bracket (such as figure 1 ), fill the appropriate amount of water into the water tanks respectively arranged on both sides of the bottom of the heat treatment chamber and located on both sides of the heater, and the amount of water is controlled at 75±...

Example Embodiment

[0171] Example 3

[0172] Except that 5 pieces of Pinus sylvestris were selected as heat-treated specimens in step 1), the average initial weight of the wood was 163.56g; step 2) the heat preservation and heat treatment time during the wood heat treatment was set to 2h; step 4) the average absolute dry weight of the heat-treated wood was 147.98g Other than that, the rest is the same as in Example 1; the GC-MS detection results are shown in Table 1 to Table 7; the VOC release amount is 1.13%.

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Abstract

The invention discloses a volatile organic compound (VOC) collecting system used in the wood heat treatment process and a collecting method utilizing the VOC collecting system. The VOC collecting system comprises a heat treatment device, a gas condensation device, a gas drying device, a VOC absorption device, a gas circulation device and a deoxygenation device which are sequentially connected through connecting pipelines. The VOC absorption device is composed of a VOC liquid phase absorption device and a VOC solid phase absorption device which are connected in series and used for absorbing VOC released in the heat treatment process. The VOC released by wood heat treatment is cooled and dried and then enters the VOC absorption device. After the VOC is collected, residual gas returns to a wood high-temperature heat treatment device through the deoxygenation device, and circulation is conducted until the VOC is completely absorbed. The VOC collecting system is simple, the collecting method enables operation to be convenient, process conditions are easy to control in the collecting process, and the collecting system and method are suitable for collecting released VOC of various types of wood under different heat treatment conditions.

Description

technical field [0001] The invention relates to a VOC (volatile organic compound) collection system and collection method, in particular to a VOC collection system and collection method during wood heat treatment, and belongs to the technical field of wood processing and energy saving and emission reduction. Background technique [0002] High-temperature heat treatment is the functional modification of wood in a physical way in a high-temperature environment to improve the dimensional stability of wood. Compared with the chemical impregnation modification, which has been criticized for its toxicity, this technology is more in line with people's requirements for green products. It has been widely used in many fields such as construction, furniture, interior and exterior decoration, packaging, etc., and has been It has gradually become a research hotspot and development direction for functional improvement of wood at home and abroad. However, although the wood heat treatment ...

Claims

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Application Information

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IPC IPC(8): B27K5/00B01D5/00B01D53/26B01D53/28B01D53/14B01D53/18B01D53/04B01D53/74B01D53/46
CPCY02A50/20
Inventor 赵紫剑马青何正斌吕欢关健伊松林
Owner BEIJING FORESTRY UNIVERSITY
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