Multi-stage heating sampling device

Abstract

The invention discloses a multi-stage heating sampling device which comprises a sampling piece, a primary heating component, a secondary heating component, a temperature sensor and an SCM (single chipmicrocomputer) chip, wherein the primary heating component comprises a hollow first casing, a gas pipe and a self-limiting temperature heating cable; the gas pipe is disposed in the first casing; aninlet end of the gas pipe is connected with an outlet end of the sampling piece; the self-limiting temperature heating cable is wound around the gas pipe; the secondary heating component comprises a hollow second casing and a heater; an inlet of the second casing is connected with an outlet of the first casing; the heater is disposed in the second casing; the inlet end of the heater is connected with the outlet end of the gas pipe; the outlet end of the heater is connected with the outlet end of the second casing; the temperature sensor is disposed in the heater and used for collecting a temperature value of a gas in the heater; an input end of the SCM chip is connected with an output end of the temperature sensor, and the output end of the SCM system chip is connected with a control end of the heater. By adopting the device provided by the invention, an effect that flue gas quickly reaches a required temperature can be realized, and thus, no influence is caused on the measurement, andno damage is caused to the entire gas path.

Description

technical field [0001] The invention belongs to the technical field of industrial detection, and in particular relates to a multi-stage heating sampling device, which is used for sampling and heating of flue gas inside a flue. Background technique [0002] In the prior art, most of the probe rods in the industry are heated once, and it is difficult to quickly reach the required temperature due to the fast flow rate of the flue gas. There is water vapor. In optical measurement, the presence of water vapor will affect the measurement; in daily use, water vapor will mix with the particulate matter in the flue gas, which will cause the pipeline to block, thereby causing damage to the entire gas path. SUMMARY OF THE INVENTION [0003] In view of the above problems, the present invention proposes a sampling device with multi-stage heating, which can quickly reach the required temperature, so it will not affect the measurement, and will not cause damage to the entire gas path. ...

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, most of the probe rods in the industry use one-time heating, because the flue gas flow rate is fast, it is difficult to quickly reach the required temperature; in industrial testing equipment, if the gas to be tested cannot reach the required temperature, for example, if it is above 100°C, the flue gas will The existence of water vapor, in optical measurement, the presence of water vapor will affect the measurement; in daily use, water vapor will mix with the particles in the flue gas, which will cause the blockage of the pipeline, thus causing damage to the entire gas circuit

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