Device and method suitable for on-line detection of particulate matters in high-temperature gas pipeline

Abstract

The invention provides a device and a method suitable for on-line detection of particulate matters in a high-temperature gas pipeline. The device comprises an on-line detection unit and a preheating sweeping unit, wherein the on-line detection unit comprises a main sampling subsystem, a secondary sampling subsystem, a particle matter grain size on-line analyzer and a first flow measurement control subsystem, which are connected in series; the secondary sampling subsystem comprises a gas flow distributor and a secondary sampling nozzle; the gas flow distributor is provided with a cavity and two gas outlets and is divided into a main path and a side path; the main path is connected with the secondary sampling nozzle, the particle matter grain size on-line analyzer and the first flow measurement control subsystem sequentially in series, and the side path is connected with a second flow measurement control subsystem in series; and the preheating sweeping unit is connected onto the pipeline between the main sampling subsystem and the secondary sampling subsystem in parallel and used for sweeping and preheating the pipeline of the whole system. The device further can comprise an off-line detection unit and a long-term on-line monitoring unit. According to the device, the long-term on-line detection of the particulate matters in the high-temperature gas pipeline can be realized.

Description

technical field [0001] The invention relates to a collection and analysis technology for particulate matter in pipelines, in particular to a device and method suitable for on-line detection of particulate matter in high-temperature gas pipelines. Background technique [0002] High-temperature ceramic filter is a commonly used filter equipment in coal chemical industry and catalytic cracking. The fracture of the filter tube is an important problem at present. Once the ceramic filter tube is broken, the concentration of particulate matter in the pipeline will increase rapidly and seriously endanger the downstream. The normal operation of the equipment, for example, causes the wear of the blades of the flue gas turbine, etc., but currently there is a lack of real-time monitoring technology for the concentration of particulate matter at the filter outlet. Therefore, it is of great significance to measure the particulate matter at the inlet and outlet of high-temperature filtrati...

AI Technical Summary

Problems solved by technology

This offline detection method can objectively measure the characteristics of particulate matter in the pipeline, but when the concentration is low, the operation time is long and the real-time performance is not good

At present, most of the online detection devices adopt the optical principle and can only detect under normal temperature and pressure. If the detection equipment is used in high-temperature conditions, it needs to cool down the high-temperature gas and then pass the instrument for detection. The reduction of temperature will make some Some gases precipitate liquid droplets, causing particles to agglomerate, affecting the measurement results, and the condensed droplets will also pollute the optical lens

At present, there are also a few instruments that can be directly used for direct measurement under high temperature conditions, but from the perspective of field use, the measurement results of the measuring instrument are not accurate when the concentration is too low or too high

And there is still a lack of long-term monitoring of particulate matter in this field, such as monitoring the concentration of particulate matter at the outlet of high-temperature filtration and separation equipment to evaluate the performance of separation and filtration equipment

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