US 12,092,599 B2
Online monitoring device and method for fouling and slagging based on capacitance principle differential measurement
Jiajie Zhang, Taiyuan (CN); Jiansheng Zhang, Taiyuan (CN); Yanwei Chen, Taiyuan (CN); Suxia Ma, Taiyuan (CN); and Dapeng Bi, Taiyuan (CN)
Assigned to TAIYUAN UNIVERSITY OF TECHNOLOGY, Taiyuan (CN)
Appl. No. 17/433,150
Filed by Taiyuan University of Technology, Taiyuan (CN)
PCT Filed Aug. 10, 2020, PCT No. PCT/CN2020/108104
§ 371(c)(1), (2) Date Aug. 23, 2021,
PCT Pub. No. WO2021/052055, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 201910871412.5 (CN), filed on Sep. 16, 2019.
Prior Publication US 2022/0155249 A1, May 19, 2022
Int. Cl. G01N 27/22 (2006.01); G01K 7/00 (2006.01); F23J 1/00 (2006.01)
CPC G01N 27/22 (2013.01) [G01K 7/00 (2013.01); F23J 1/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An online monitoring device for fouling and slagging based on capacitance principle differential measurement, comprising three measuring devices being arranged at the same height of a boiler heating surface of a boiler, wherein
each measuring device among the three measuring devices includes a fixed sleeve and a sensor, one end of the fixed sleeve is fixed on the boiler heating surface, the sensor is nested in the fixed sleeve and connected with the fixed sleeve through screw threads, the end of the sensor near the boiler is equipped with a measuring probe;
the measuring probe includes a central electrode, a ring electrode, a insulating ceramic and a thermometric element, the central electrode has a circular cross section, the ring electrode is arranged around the central electrode, the insulating ceramic is arranged on the outside of the ring electrode and also between the ring electrode and the central electrode, the thermometric element is arranged in the insulating ceramic to measure the temperature of the measuring probe; and
the distances between the end of sensor and the end of fixed sleeve are different for each measuring device.