Pumping measurement method for formaldehyde release quantity of artificial board

A formaldehyde emission, man-made panel technology, applied in the preparation of test samples, sampling devices and other directions, can solve the problems of easy pollution, difficult to handle, unable to do quantitative measurement, etc., and achieve the effect of simple and feasible method and low cost.

Inactive Publication Date: 2005-01-26
NANJING FORESTRY UNIV
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Problems solved by technology

[0002] At present, the methods for measuring formaldehyde emission from wood-based panels in China's national standards mainly use the perforation extraction method, but the perforation method is costly, complicated to operate, and uses many types of drugs, especially toluene is poisonous, difficult to handle, easy to pollute, and difficult to use as Manufacturer's self-test means
Although the equipment and operation method for detecting formaldehyde in the air provided by patent 02256675.9 are simple, it can only be used for qualitative measurement of whether the formaldehyde content in the air exceeds the standard, and cannot measure the amount of formaldehyde released from wood-based panels, let alone quantitative measurement.

Method used

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  • Pumping measurement method for formaldehyde release quantity of artificial board

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Embodiment 1

[0020] The present invention proposes a kind of suction method of measuring the amount of formaldehyde released from wood-based panels, which is described as follows in conjunction with the accompanying drawings:

[0021] The entire processing system is placed in a working room that meets certain environmental requirements. The suction conditions are as follows: the temperature of the working room is 60°C, the air flow rate is 60 liters / hour, and the suction is 6 hours. Every hour, the air in and out of the sample bottle One replacement is realized through automatic control of electronic valves (a group of valves 12-1 and 12-3, and a group of valves 12-2 and 12-4). Under the action of the vacuum pump 10, the air 1 at 60°C is passed through the pipeline into the sealed water washing bottle 2. The pipeline has holes below the liquid surface, and the air escapes from the holes in the pipeline. Since formaldehyde is easily soluble in water, the air can be released. The formaldehyd...

Embodiment 2

[0023] The present invention proposes a kind of suction method of measuring the amount of formaldehyde released from wood-based panels, which is described as follows in conjunction with the accompanying drawings:

[0024] The entire processing system is placed in a working room that meets certain environmental requirements. The suction conditions are as follows: the temperature of the working room is 40°C, the air flow rate is 50 liters / hour, and the suction is 4 hours. Every 0.5 hours, the direction of air in and out of the sample bottle One replacement is realized through automatic control of electronic valves (a group of valves 12-1 and 12-3, and a group of valves 12-2 and 12-4). Under the action of the vacuum pump 10, the air 1 at 40°C is passed through the pipeline into the sealed water washing bottle 2. The pipeline has holes below the liquid surface, and the air escapes from the holes in the pipeline. Since formaldehyde is easily soluble in water, the air can be released...

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Abstract

This invention discloses a sucking measurement of formaldehyde discharge of wood-based plate. It is to vent the purified and dried air with flow quantity of fifty to sixty litre per hour into the test case with some specimen in it. The specimen releases formaldehyde during the process of temperature and negative pressure suction. The released formaldehyde is brought into reception liquid by air and the formaldehyde amount in the liquid.

Description

technical field [0001] The invention belongs to the technical field of wood-based panels, and relates to a suction measurement method for formaldehyde emission from wood-based panels. Background technique [0002] At present, the methods for measuring formaldehyde emission from wood-based panels in China's national standards mainly use the perforation extraction method, but the perforation method is costly, complicated to operate, and uses many types of drugs, especially toluene is poisonous, difficult to handle, easy to pollute, and difficult to use as Manufacturer self-test means. Although the equipment and operation method for detecting formaldehyde in the air provided by patent 02256675.9 are simple, they can only perform qualitative measurement on whether the formaldehyde content in the air exceeds the standard, and cannot measure the formaldehyde emission of wood-based panels, let alone quantitative measurement. Contents of the invention [0003] The purpose of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24G01N1/34
Inventor 周定国周晓燕黄河浪梅长彤徐信武
Owner NANJING FORESTRY UNIV
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