Semi-volatile organic matter sampling technique in exhaust emission pipe

A semi-volatile and waste gas emission technology, which is applied in the direction of sampling device, test sample preparation, etc., can solve the problems of collection, small molecular weight, filter cartridge loss, etc., and achieve the effect of convenient extraction and small volume
CN101464232AActive Publication Date: 2009-06-24็Ž‹ไธ•ๅพ
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
็Ž‹ไธ•ๅพ
Publication Date
2009-06-24

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Abstract

The invention relates to a technical method for taking samples of semi-volatile organic compounds SVOC in a waste gas discharge pipe. The isokinetic sampling principle is adopted. A filter cylinder, a liquid collection bottle and an absorbent are used for collecting SVOC samples from the waste gas discharge pipe. The structure mainly consists of a sampling device and an isokinetic sampler mainframe; the sampling device comprises a pitot tube, a temperature sensor, a humidity sensor, the filter cylinder, a heating insulating device, a condensation device, the liquid collection bottle, an absorption tank, and an absorbent. When in sampling, the sampling device is inserted into the waste gas discharge pipe; a microprocessor in the isokinetic sampler tracks the discharge flow velocity of the sampling point; the purpose of isokinetic sampling can be achieved by maintaining the isokinetic sampling conditions; the SVOC samples in the form of particle in the waste gas discharge pipe are collected in the filter cylinder; the SVOC samples in the form of steam flow into the liquid collection bottle after being condensed; the SVOC samples in gas phase state are collected by the absorbent in the absorption tank; the rest gas after passing through the isokinetic sampler is discharged by an air extracting pump into the atmosphere; and after the sampling ends, samples collected in the filter cylinder, the liquid collection tank and the absorbent in the absorption tank are sent to a chemical laboratory for analysis.
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Description

technical field

[0001] The invention relates to a method for sampling semi-volatile organic compounds in exhaust gas discharge pipes. Background technique

[0002] Semi-volatile organic compounds (hereinafter referred to as SVOC) are contained in the exhaust gas discharged from flue, industrial waste gas discharge pipe, waste incinerator waste gas discharge pipe, etc. (hereinafter referred to as waste gas discharge pipe). These include polycyclic aromatic hydrocarbons (PAHs) organochlorine pesticides, organophosphorus pesticides, polychlorinated biphenyls, polychlorinated dibenzofurans, phthalic acid lipids, etc., which mainly exist in the form of gas, vapor, and particles. Among them, the 2-3 ring PAHs mainly exist in the gas phase, the 5-6 ring PAHs mainly exist in the particles (adsorbed on the surface of the particles), and the PAHs in between are distributed in both the gas phase and the solid phase. Mixture of gas phase and particulate matter. At present, the current...

Claims

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