Dynamic CO detection device for pulverized coal preparation

Abstract

The invention relates to a dynamic CO detection device for pulverized coal preparation. The device comprises two trumpet-shaped hollow heating boxes with trumpet openings being opposite to each other, heating assemblies arranged in the trumpet openings of the two hollow heating boxes, a filtering structure which is arranged outside the heating assemblies and is communicated with the two hollow heating boxes, an air inlet box and an air outlet box which are arranged at one ends of the two hollow heating boxes respectively and communicated with the hollow heating boxes, cleaning assemblies which are arranged in the air inlet box and the air outlet box respectively and used for cleaning the inner walls of the hollow heating boxes and the filtering structure, and a CO analyzer detachably installed in the air outlet box. The two symmetrically-distributed trumpet-shaped hollow heating boxes are matched with the heating assembly clamped in the middle, moisture in sampled gas can be dried, pulverized coal is efficiently filtered and then detected through the CO analyzer, a detection probe can be prevented from being damaged, the detection precision of the CO analyzer is greatly improved, and the service life of the CO analyzer is prolonged.

Description

technical field [0001] The invention belongs to the technical field of carbon monoxide detection, and in particular relates to a dynamic CO detection device for coal powder preparation. Background technique [0002] As the core equipment of the boiler combustion pulverization system, the power plant coal mill is an important paving machine of the power plant, and its working status has an important impact on the safety and economy of the entire power plant system operation. Coal is the main fuel of thermal power plants. Improving the safety and stability of equipment operation, developing technologies related to monitoring and diagnosis, and implementing condition-based maintenance are inevitable requirements for power plants. [0003] When coal is crushed, pulverized, and processed in power plant coal mills, fires and explosions are possible. Once the coal powder accumulates abnormally, before its local temperature begins to change significantly, the heat generated by fric...

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Problems solved by technology

[0004] Due to the complex composition of flue gas at the outlet of the coal mill, except SO 2 , NO x , CO, CO 2 , O 2 In addition to other gas components, it also contains a large amount of water and dust. Moisture has an impact on the measurement results of CO concentration, and the flue gas dust particles are relatively large, which is easy to accumulate and block the pipeline, causing the CO analysis instrument to malfunction or even malfunction. Therefore, Before measuring the concentration of the sample gas, it is necessary to perform dust removal and dehydration pretreatment on the sampled flue gas to ensure the continuity and reliability of the CO concentration monitoring at the outlet of the coal mill

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