A method and device for testing the performance of an air preheater of a coal-fired boiler

By integrating fly ash sampling, flue gas analysis, and temperature measurement into the tube seat and gland assembly of the coal-fired boiler air preheater performance test device, the problems of easy corrosion, jamming, and poor sealing of the plugs have been solved, achieving efficient and accurate performance testing, and reducing labor intensity and the risk of air and smoke leakage.

CN122108652APending Publication Date: 2026-05-29INNER MONGOLIA MENGDA POWER GENERATION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INNER MONGOLIA MENGDA POWER GENERATION CO LTD
Filing Date
2026-01-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing performance tests of air preheaters for coal-fired boilers, the plugs are prone to corrosion and jamming, making opening and closing difficult and resulting in poor sealing, which affects the test accuracy and boiler economy. Furthermore, the nozzle sizes of different instruments vary greatly, leading to poor adaptability.

Method used

Design a performance testing device for an air preheater of a coal-fired boiler, including a tube seat and a functional pressure cap assembly, which are fixed to the wall of the flue or air duct by welding or threaded connection. It integrates fly ash sampling, flue gas analysis, temperature measurement and pressure measurement functions, and uses an annular sealing ring and pressure cap connection knob to achieve rapid switching and sealing, reduce the number of openings, and improve sealing performance and operating efficiency.

Benefits of technology

It enables convenient switching between multiple parameter measurements, reduces labor intensity, improves test accuracy and data accuracy, reduces the risk of air and smoke leakage, has a compact structure, is highly adaptable, and is suitable for frequent performance testing needs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application provides a kind of coal-fired boiler air preheater performance test method and device, belongs to air preheater performance test technical field, it can at least partially solve the existing plug easy to rust, jam, open and close difficult;Plug is easy to lose or not tight, influence test precision and boiler economy;Different instrument gun head size difference is big, measuring seat and plug are not designed for multi-specification, and the adaptability of multi-point grid measurement and multi-instrument switching is poor, the present application includes tube seat, functional gland assembly and gland connection knob, the present application is provided with tube seat and functional gland assembly, so that sampling gun head can be inserted and exited smoothly, functional gland assembly is integrated multiple sampling glands in the same tube seat position, can realize multiple parameter measurement in the same measuring point, without opening multiple measuring holes on flue or air duct, reduce the number of opening, the influence on flue and air duct intensity and sealing is smaller, avoid the loss, mixed placement or falling problem caused by traditional blind head and plug in test temporary placement.
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