Device for testing diffusing rate of pollutants

Abstract

The invention relates to a device for testing the diffusing rate of pollutants. In the device for testing the diffusing rate of the pollutants, in a testing room provided with an air-conditioning system and a dehumidifier, an air outlet of a fan is connected with a static pressure box through a filter component and a humidifier; the static pressure box is provided with a plurality of air outlets; each air outlet is connected with a sealed testing box through an independent pipeline; a regulating valve and a conventional low-pressure flowmeter are arranged between the air outlets of the fan and the testing boxes; the testing boxes are connected with an adsorption tube through an air exhaust valve; and a pressure regulating valve is arranged on the static pressure box. The device can construct and test a plurality of small-sized testing units in a lab, can increase or decrease the number of the testing units according to actual requirements, and is flexible and convenient to regulate and control; the fan is used together with the static pressure box, so the application of the conventional fittings is guaranteed and the using flexibility and reliability are improved; and the acquisition and operation costs of equipment are obviously reduced. On the whole, the device is lower in cost and flexible in installation and use and is favorable for popularization and application on the premise of guaranteeing the conditions required by the test.

Description

technical field [0001] The invention relates to the testing of pollutant emission of boards, adhesives, coatings, carpets and other materials in the fields of construction, environment, sanitation and the like, and in particular relates to a pollutant emission rate testing device. Background technique [0002] In modern society, the source of indoor air pollution is that indoor decoration materials and other pollution sources emit harmful pollutants such as formaldehyde, toluene, and VOCs (volatile organic compounds) that exceed the acceptable levels of indoor personnel. [0003] The small-scale test chamber is an ideal device for detecting the emission of pollutants from decorative materials such as wood-based panels, adhesives, paint carpets, etc. under the environmental conditions closest to their actual application. Air pollution control is of great significance. [0004] The working principle of the test chamber is: put the sample per unit surface area into the test ch...

AI Technical Summary

Problems solved by technology

[0006] One is that although the price of the cabin itself is not high in the test cabin, the cost of the temperature adjustment device, humidity adjustment device, and air purification treatment device is relatively high, resulting in a high price for the entire test cabin. If multiple samples need to be tested at the same time Testing will lead to high purchase costs and high operating costs, especially when a laboratory is faced with large verification and inspection tasks and requires a large number of test chambers, such as 50 to 100, the purchase cost will grow linearly with the number of chambers , the purchase and operation cost burden is extremely high

Due to the current domestic testing cost standards are generally not high, so the testing unit is unwilling to purchase a large number of related equipment, which greatly restricts its popularization and application, resulting in the scientific testing method of emission testing cannot be effectively promoted;

[0007] The second is that the test chamber system usually installs a mass flow meter between each test chamber and the air source to monitor the air flow rate and air replacement rate. Due to the limitation of the working pressure of the mass flowmeter, the existing test chamber system generally can only use high-pressure gas cylinders or compressed air provided by the air compressor as the air source. The performance and safety requirements are high; a high-pressure total air source directly supplies air to multiple test chambers at the same time, the air supply is uneven, the air flow is unstable, and the accuracy of the test data is affected; the price of the mass flow meter is high, and it must be configured in the laboratory In the case of a large number of test chambers, the purchase and operation costs will be further increased

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