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Filtration efficiency calibration system for air filtration equipment

A filtration efficiency and air filtration technology, which is applied in the testing of mechanical components, permeability/surface area analysis, testing of machine/structural components, etc., can solve the problem of varying response curves and accuracy, large differences in mass concentration, and poor data comparability and other problems, to achieve the effect of short air residence time, prevention of static electricity and particle adsorption, and no dead angle of air flow

Inactive Publication Date: 2015-11-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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AI Technical Summary

Problems solved by technology

However, the light sources, detectors and light chambers used by manufacturers of light-scattering dust meters are not the same, and the calibration methods used by the instruments before leaving the factory are not the same, resulting in wide variations in the response curves and accuracy of the instruments. Large, which brings inconvenience to users and poor data comparability

Method used

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  • Filtration efficiency calibration system for air filtration equipment

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Embodiment Construction

[0015] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0016] Such as figure 1 Shown is a filtration efficiency calibration system for air filtration equipment, which includes an air compressor, a freeze dryer, a three-stage filter, an atomization generator, a diffusion dryer, an electrostatic neutralizer, a uniform mixing box, and an aerosol splitter device, the first three-way valve, the second three-way valve, high-efficiency filter, standard flow meter, air pump and aerosol particle size spectrometer;

[0017] The homogeneous mixing box has two input channels, which are respectively the dilution airflow input channel and the solid aerosol input channel;

[0018] The air compressor, the freeze dryer and the three-stage filter are connected in sequence, and the output channel of the three-stage filter is connected to the dilution air flow input channel of the uniform mixing box and the input channel of the ...

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Abstract

The invention discloses a filtration efficiency calibration system for air filtration equipment. The system is used for calibrating the filtration equipment and is characterized in that an air compressor, a freezing dryer and a three-stage filter are sequentially connected, the three-stage filter is connected with a uniform mixing box and an atomization generator, the atomization generator is connected with a diffusion dryer which is connected with an electrostatic neutralizer, and the electrostatic neutralizer is connected to a solid aerosol channel of the uniform mixing box; the uniform mixing box is connected with an aerosol shunt, one channel of the aerosol shunt is connected to a channel M1 of a first three-way valve through to-be-calibrated filtration equipment, and the other channel is connected to a channel N1 of a second three-way valve; M2 and M3 of the first three-way valve are connected with an aerosol spectrometer and a high-efficiency filter respectively, N2 and N3 of the second three-way valve are connected with the aerosol spectrometer and the high-efficiency filter respectively, and the output end of the high-efficiency filter is sequentially connected with a standard flow meter and a gas pump. The calibration is performed according to readings of the flow meter and the aerosol spectrometer.

Description

technical field [0001] The invention belongs to the technical field of air quality detection, and relates to a filtration efficiency calibration system of air filtration equipment. Background technique [0002] At present, digital dust meters have been widely used in indoor air quality detection, workplace air quality detection, mine dust concentration detection and outdoor air quality detection. Different manufacturers have different names for the dust meters they produce, such as digital dust meters, intelligent digital dust meters, microcomputer dust meters, respirable dust meters, explosion-proof dust meters, and so on. Generally speaking, these instruments can be collectively referred to as dust meters, which are instruments for detecting the mass concentration of dust particles in the ambient air. According to the measurement principle, the dust meter can be divided into two types: light scattering dust meter and piezoelectric balance dust meter. The light-scattering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01M13/00
Inventor 谭建伟葛蕴珊郝利君王谦
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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