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A malodorous gas and measurement method technology, which is used in the odor concentration test of low-concentration malodorous gas, and the measurement field of low-concentration malodorous gas
Inactive Publication Date: 2011-02-16
TIANJIN ACADEMY OF ENVIRONMENTAL SCI
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And the existing three-point comparative formula smel
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Embodiment 1
[0022] Such as figure 1 Shown low-concentration malodorous gas measuring method, it comprises the steps:
[0023] (1) Adsorption treatment:
[0024] At a normal temperature of 20°C, quantitatively pass 100L of malodorous gas into a glass tube filled with solid Tenax poly-2,6-diphenyl-p-phenylene ether and activated carbon through a flow measuring device. The length of the concentrating tube is about 10cm, pipe diameter 1cm, (poly-2,6-diphenylphenyl ether:activated carbon volume ratio is 1:1), completely adsorb the malodorous substance contained in the malodorous gas, and the adsorption time is 20min. The flow rate is 5L / min, and the treated gas flows out from the other end.
[0025] (2) thermal analysis treatment:
[0026] Heat the glass tube in the first step to 120°C to desorb the malodorous substances adsorbed on the solid adsorbent, and then desorb the malodorous substances adsorbed for 2 minutes.
[0027] (3) Stripping treatment:
[0028] Through the flow measuring d...
Embodiment 2
[0030] (1) Adsorption treatment:
[0031] At a normal temperature of 25°C, through a flow measuring device, quantitatively pass 100L of malodorous gas into a glass tube filled with solid Tenax poly-2,6-diphenyl-p-phenylene ether and activated carbon. The length of the concentrating tube is 10 cm. , diameter 1cm, (poly 2,6-diphenylphenyl ether: activated carbon weight ratio is 1: 1.5), completely absorb the malodorous substances contained in the malodorous gas, and the treated gas flows out from the other end. The adsorption time is about 10min, and the flow rate is 10L / min.
[0032] (2) thermal analysis treatment:
[0033] Heat the glass tube in the first step to a specific temperature, such as 140°C, to desorb the malodorous substances adsorbed on the solid adsorbent, and then desorb the malodorous substances adsorbed. The adsorption time is 3min.
[0034] (3) Stripping treatment:
[0035] Through the flow measuring device, quantitatively pass 10L N into the glass tube 2...
Embodiment 3
[0037] Application Test Description:
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Abstract
The invention relates to a measuring method of low-concentration odorous gas, comprising the following steps: adsorption treatment: at the normal temperature of 20-25 DEG C, filling 100L of odorous gas into a glass tube filled with solid Tenax poly 2,6-diphenyl-p-phenvlene and activated carbon to completely adsorb odorous substances in the odorous gas; heat resolution treatment: heating the glass tube in the first step to a specific temperature, and resolving the adsorbed odorous substances again; blowing treatment: carrying out desorption on the odorous substances by 10L of carrier gas N2; mixing the odorous substances with N2; flowing out and collecting from the other end to obtain the odorous gas which is condensed by 10 times; measuring the concentration of the odorous gas concentrated by 10 times with a GB/T14675-93 three-point comparative smelly bag method; calculating to obtain the concentration of the odorous gas of the original odorous gas. By using the method of the invention, the low-concentration odorous gas is condensed to reach the range which can be measured by the existing three-point comparative smelly bag method. The measuring method of the invention has the advantages of no pollution, low cost, good deodorization effect and the like, is economic, convenient, quick and easy to realize, and is more suitable for measuring the concentration of the odorous gas under low-concentration environment.
Description
technical field [0001] The invention belongs to the technical field of environmental protection detection, relates to a method for measuring low-concentration malodorous gas, and is particularly suitable for a method for testing the odor concentration of low-concentration malodorous gas. Background technique [0002] Odor is a kind of olfactory pollution that is perceived by the odor in the atmosphere, water, waste and other substances through the air medium and acting on people's olfactory thinking. The main sources of malodorous gas are industrial production, municipal sewage, sludge treatment, garbage disposal facilities, and corresponding sources of chemical pharmaceuticals, rubber and plastics, paint coatings, printed and dyed leather, livestock breeding, and fermentation pharmaceuticals. Different treatment facilities and processes will produce various malodorous gases. For example, from the malodorous gas hydrogen sulfide (H 2 S), produced in many industries such as...
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