Flue gas sampling test system and method for boiler test

Abstract

The invention relates to a boiler test system in the thermal power industry, and in particular, relates to a flue gas sampling test system and method for a boiler test. The system comprises a flue gassampling device, a flue gas testing device and a switching control device which are connected outside a boiler flue; the flue gas sampling device comprises a plurality of flue gas sampling channels which are arranged in the flue and perpendicular to the flue gas flow direction, and flue gas mixers which are connected with outlets of the flue gas sampling channels respectively and are arranged outside the flue; the input end of the switching control device is connected with the outlets of the flue gas sampling channels, and the output end is connected with the flue gas testing device; each flue gas sampling channel comprises a sampling probe and a flue gas storage device which are sequentially connected through a connecting pipeline; the sampling probes are arranged in the flue in a mannerof being vertical to the flow direction of flue gas; the flue gas storage device is arranged outside the flue, and an outlet of the flue gas storage device is connected with the flue gas mixer and the switching control device. The system has the advantages of being convenient to operate, low in cost, accurate, reliable and the like, and has good application and popularization value.

Description

technical field [0001] The invention relates to a boiler test system in thermal power industry, in particular to a flue gas sampling test system and method for boiler test. Background technique [0002] In the thermal power plant boiler test, in order to ensure the reliability of the test results, the grid method is usually used to determine the representative points of the flue section, and the average value and distribution law of the parameters on the entire flue section can be obtained by testing the determined representative measuring points . The traditional test method is often to manually measure the data of each measuring point sequentially, and the test lasts for a long time. For a conventional 300MW~1000MW unit, the sampling test time often reaches more than 2 hours. During this process, fluctuations in working conditions are inevitable. , which will have a great adverse effect on the accuracy of the test results. In addition, in the conventional boiler test, it...

AI Technical Summary

Problems solved by technology

However, in this solution, the gas is stored in the gas storage for a long time, and the length of time is different. During this process, the gas components are easy to diffuse and mix in the large cross-section gas storage device, which will adversely affect the test results.

In addition, during the test process, the inlet flow area of ​​the gas tank is small, and a jet flow will be generated during the pumping test, which makes the external gas and the sample gas in the gas tank mix quickly, which interferes with the test.

This solution also needs to manually plug and unplug the sample gas pipeline to complete the switching between measuring points, which has a low level of automation and a large workload

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