Artificial board formaldehyde burst size detection system

Abstract

The invention discloses a system for detecting formaldehyde emission rate of an artificial board, which comprises a detection box device, an air path device, a water path device, a cyclic sampling device and a system control system; wherein the detection box device has a hollow cavity therein for accommodating a sample to be detected; the air path device is used for filling air into the hollow cavity of the detection box to keep the pressure in the cavity at a standard test pressure; the water path device is used for providing a heat-insulation layer for the detection box device and heating the air filled into the detection box to keep the temperature in the cavity of the detection box device at the standard test temperature; the cyclic sampling device is used for collecting the mixture gas of air and formaldehyde emitted from the test sample in the detection box device and detecting the mixture gas sample to obtain the formaldehyde emission rate in the sample; and the system control device is used for respectively controlling the pressure, the temperature and the sampling sequence of the air path device, the water path device and the cyclic sampling device. The inventive detection system has the advantages of short detection time, high control accuracy, easy operation, etc.

Description

technical field [0001] The invention relates to a detection system, in particular to a detection system capable of rapidly detecting formaldehyde emission from wood-based panels. technical background [0002] Over the years, the growth rate of China's wood-based panel production has been 6-8 percentage points higher than China's GDP. By 2006, my country's wood-based panel production had reached 74.28 million cubic meters, surpassing the United States and ranking first in the world. With the continuous increase of wood-based panel production, people's requirements for its "quality" are also getting higher and higher. Therefore, methods such as extraction method, desiccator method and climate chamber method to detect the amount of formaldehyde released from wood-based panels have emerged one after another. Among them, the perforation extraction method is simple and easy to operate, but the test results cannot directly reflect the environmental pollution caused by the release ...

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Problems solved by technology

Among them, the perforation extraction method is simple and easy to operate, but the test results cannot directly reflect the pollution of the environment caused by the release of formaldehyde; the desiccator method uses titration when calibrating formaldehyde, but this method has low test accuracy and narrow test range; the climate chamber method is the largest. The advantage of this method lies in the ability to accurately simulate the actual environment. This method can simulate climate treatment on samples of wood-based panels and their products, and even large-scale overall test pieces to evaluate their formaldehyde emission performance.

But this kind of testing equipment is bulky and expensive. The wood-based panel sample to be tested is put into a test box with a volume of about 1 cubic meter. After the formaldehyde of the wood-based panel in it is released and reaches the standard test conditions, the mixed gas therein is then tested. Testing, this process takes a long time and may last up to 28 days to meet the standard testing conditions. Therefore, the testing cycle is long, which cannot adapt to the fast-paced market changes and the requirements of customs clearance for import and export goods, and also consumes a lot of Manpower, material resources and energy are contrary to the national demand for energy conservation and consumption reduction

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