专利名称：Measurement of electrical resistivity of
particulate entrained in a gas stream
发明人：Krigmont, Henry V.,Coe, Everett L., Jr.申请号：EP90110548.6申请日：19900602公开号：EP0401724B1公开日：19950222
摘要：The resistivity of particulate matter in a gas stream, such as a combustion gasstream produced in a coal-fired power plant, is measured by collecting a sample of theparticulate on the surface of a porous ceramic cylinder (62), either with or without anapplied collection voltage, and then determining the resistance of the sample with acompound measurement electrode (82) having multiple conductors (84,86). The refereceelectrode (89) and the measurement electrode (82) are spirally wound on the ceramiccylinder (62) in an interdigitated manner, so that the two (82,98) are laterally adjacentdown the length of the cylinder (62). The pressure within the cylinder (62) is controllable,with a pressure below atmospheric being applied to draw the particulate to the surfaceand ascertain when a sufficient sample for measurement is present, and a pressure aboveatmospheric being applied to blow away the sample after the measurement iscompleted, thereby preparing the instrument for the taking of another sample.
申请人：WAHLCO, INC.
代理机构：Dreiss, Fuhlendorf, Steimle & Becker, Patentanwälte
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