Multi-functional gas sampling system and gas sampling method

Abstract

The invention discloses a multi-functional gas sampling system and a gas sampling method in the field of gas sampling devices. The system adopts the structure that a gas inlet opening and a gas outlet opening of an off-gas pump are respectively connected with a first switching valve and a second switching valve, an overvoltage protection valve and a gas collecting opening are arranged between the first switching valve and the second switching valve, and a gas thermometer, an integrating flowmeter, a water drain pipe, a dust collecting pipe and a gas inlet opening which are connected in series in sequence are connected on a connector opposite to a connector of the first switching valve and the overvoltage protection valve. The gas sampling method comprises the following steps: 1. processing gas to be sampled for a gas sampling pipeline by a prepumping gas passage; 2. cleaning a gas sampling bag; and 3. collecting the gas. The filtrating and the dehydrating are performed to the gas required for analysis, and then the gas is transformed into dried gas to be filled in a special gas container so as to ensure that the gas is in a stable state; the volume and the total mass of the dried gas are accurately measured, and the analyzed gas is accurately measured and analyzed; and the invention is suitable for sampling combustible gas, atmosphere, biological metabolites and tail gas in chemical plants, and the like.

Description

technical field [0001] The invention belongs to the field of gas sampling equipment, and in particular relates to a multifunctional gas sampling system and a sampling method applied to combustible gas analysis and sampling, atmospheric sampling, biological metabolite sampling, chemical plant tail gas sampling and the like. Background technique [0002] In the industrial production process, it is often necessary to measure the gas composition. At present, the types of gases that can be measured online are very limited. Most of the gas components need to be sampled and then analyzed with laboratory equipment. During the patent search, it was found that the existing sampling systems or devices are mainly designed for sampling power components, specific gas sources, or directly providing gas pretreatment for online equipment. All system structures are not exactly the same, especially those with The functional cleaning device for cleaning and the dehydration structure that can me...

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Problems solved by technology

[0003] The purpose of the present invention is to propose a multifunctional gas sampling system and sampling method in view of the lack of cleaning function and water content measurement in the gas sampling device in the prior art

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