Dynamic odor measurement instrument

Abstract

The invention relates to a dynamic odor tester, comprising a shell and a test and control gas circuit mounted in the shell, wherein the test and control gas circuit is divided into three gas paths; the first gas path is a reference gas path; the second gas path is a mixed gas path; the third gas path is a tested gas path; the three gas paths are connected with a stop valve, a constant pressure valve, a rotor flux meter, a mass flux control meter, a venture mixing tube, a rotary mixing chamber, a reference gas outlet and a mixed gas outlet via pipelines and a gas source access port. The dynamic odor tester utilizes dynamic dilution and parallel design, and the negative pressure mixing mechanism in the venture mixing tube, and realizes dynamic gas distribution via the high speed rotary mixing tank. The dynamic odor tester has reliable performance, and can meet domestic three-point comparison odor bag method and European osmometer method. The dynamic odor tester can be used to test the strength and concentration of odor gas sample or the gas sample of peculiar smell in exhaust stack or environment gas, while the gas sample contains a sample containing one odor material and a composite odor sample containing at least two odor materials.

Description

technical field [0001] The invention relates to a dynamic gas measuring device, in particular to a dynamic odor measuring instrument. It is used to measure the strength and concentration of odorous or peculiar smell gas samples in the exhaust pipe or in the environment. The gas samples include samples containing one malodorous substance and composite odor samples containing more than two kinds of malodorous substances. Background technique [0002] In many odor-generating industries such as environmental protection, fragrance manufacturing and daily chemical industry, it is often necessary to test the intensity and concentration of odorous or odorous gases. Every country in the world has its own set of odor test methods. At present, China, Japan and South Korea use the same static dilution method, while European and American countries use the dynamic dilution method. The odor test experiment in my country is based on the three-point comparative experimental method introduce...

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Problems solved by technology

[0004] The device involving dynamic dilution that can be found abroad is US Patent 5767385. The device is characterized by providing four people to judge the presence or absence of odor on the instrument at the same time. Domestic standard three-point comparative stinky bag method

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