Centrifugal type high-temperature sampling probe system

Abstract

The invention discloses a centrifugal type high-temperature sampling probe system. An inlet of a high-temperature sampling probe is connected with a flue; an outlet of the high-temperature sampling probe is connected with an inlet of a centrifugal helical rail; an inertia gas-dust separator consists of a T-shaped pipe and an isolation pipe; the isolation pipe is inserted into one end of a transverse pipe of the T-shaped pipe and is sleeved by the transverse pipe of the T-shaped pipe; the outer end of the isolation pipe is connected with an outlet of the centrifugal helical rail; the inner end of the isolation pipe is positioned at a joint of the transverse pipe and a vertical pipe of the T-shaped pipe; an inclined incision is formed in the inner end of the isolation pipe; the back surface of the inclined incision is just opposite to the vertical pipe of the T-shaped pipe; an ejector is mounted at the other end of the transverse pipe of the T-shaped pipe; an ejection pipe connected with compressed air is arranged in the ejector; an outlet of the ejector is connected to the flue; an inertia filter is mounted in the vertical pipe of the T-shaped pipe; the vertical pipe is connected with one end of a three-way pipe, another end of the three-way pipe is connected with back purging gas through a valve, and a valve, a fine filter and a gas extraction pump are mounted at the third end of the three-way pipe in sequence. The centrifugal type high-temperature sampling probe system can fulfill the aim of long-time stable sampling.

Description

technical field [0001] The invention relates to a centrifugal high-temperature sampling probe system, which belongs to the on-line gas analysis sampling pretreatment technology. Background technique [0002] At present, most of the online gas analysis adopts the suction type, that is, the sampling probe is used to extract the gas from the pipeline and transport it to the analyzer for qualitative and quantitative analysis. If the flue gas contains dust, then a microporous ceramic filter is installed in the sampling probe. filter to filter out dust. However, the dust in the flue gas will deposit on the surface of the filter and even penetrate into the inside of the filter, making the filter ineffective. Therefore, backwashing techniques must be applied to regenerate the filter. Use high-pressure compressed air to back-flush the filter to blow off the deposited dust. Since it is impossible to regenerate the filter 100% every time it is back-flushed, the filter will fail after...

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Problems solved by technology

[0003] The inventor studies the prior art carefully, and finds that its shortcoming is: adopt the method for filtering to separate gas-dust, and rely on the filter to filter out the dust. Like this, the clogging and failure of the filter are inevitable, and the filter The service life is inversely proportional to the dust content in the flue gas. The higher the dust content, the shorter the life of the filter. Frequent filter replacement is not allowed in industrial process analysis, because it causes frequent failure of the analysis.

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