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Method and device for generating aerosol in large grain size in use for testing efficiency of air filter

An aerosol generation and air filter technology, which is used in measuring devices, testing of machine/structural components, and air quality improvement, etc. Ease of control, the effect of reducing insulation requirements

Inactive Publication Date: 2007-12-26
CHINA ACAD OF BUILDING RES
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Problems solved by technology

But the mass concentration of used solution is too high, and under normal temperature, the potassium chloride solution that mass concentration is 30% has crystallized, is easy to cause the clogging of nozzle; The flow rate is adjusted to the lowest state that can stabilize dust generation, and the counting concentration of the generated aerosol also exceeds the upper limit of the concentration of domestic particle counters
Therefore, this aerosol generator is not fully applicable to the efficiency test of domestic air filters

Method used

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  • Method and device for generating aerosol in large grain size in use for testing efficiency of air filter

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The mass concentration of the potassium chloride solution is 23%; the spray flow rate is 8.3L / min; the spray pressure is 500KPa; the drying air flow rate is 113.2L / min.

Embodiment 2

[0032] The mass concentration of the potassium chloride solution is 23%; the spray flow rate is 18.9L / min; the spray pressure is 500KPa; the drying air flow rate is 113.2L / min.

Embodiment 3

[0034] The mass concentration of the potassium chloride solution is 10%; the spray flow rate is 9.5L / min; the spray pressure is 500KPa; the drying air flow rate is 113.2L / min.

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Abstract

A device used for generating big particle diameter of airosol used in efficiency test of air filter is prepared for forming air-processing unit by air filter and flow meter as well as heater, forming an atomizing unit by solution bottle and nozzle, setting nozzle at top of drying tower, feeding dried clean air into drying tower at bottom of said tower, making atomized small solution drop be dried in falling down process to from solid aerosol by controlling pressure and flow rate of compressed air as well as concentration of different potassium chloride solutions.

Description

technical field [0001] The invention relates to an aerosol generator, in particular to an aerosol generator for generating a test dust source for air filter efficiency testing, and a method for producing and verifying the aerosol generator. Background technique [0002] At present, the method for testing air filters for general ventilation is the atmospheric dust counting method, and the test dust source is atmospheric dust. This test method was proposed by domestic scientific researchers in the early 1980s. At that time, the atmospheric dust counting method was more in line with the actual situation, more accurate and more advanced than the full-efficiency test methods such as colorimetry and gravimetry. In addition, the object of air filter purification is mainly outdoor air, and the filter efficiency measured with atmospheric dust as the dust source is more consistent with the actual situation. However, due to the instability of atmospheric dust, important parameters suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N15/06G01M19/00G01M99/00
CPCY02A50/20
Inventor 王智超宋灿华安爱明
Owner CHINA ACAD OF BUILDING RES
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