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AN IMPROVED WATER /NITROGEN DUAL COOLED PROBE SYSTEM FOR COLLECTING BURNT SAMPLE PARTICLES AT VARIOUS ELEVATIONS INSIDE DROP TUBE FURNACE
AN IMPROVED WATER /NITROGEN DUAL COOLED PROBE SYSTEM FOR COLLECTING BURNT SAMPLE PARTICLES AT VARIOUS ELEVATIONS INSIDE DROP TUBE FURNACE
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机译：改进的水/氮双冷却探针系统，用于收集滴管内各种高度的燃烧样品颗粒
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摘要
The invention relates to an improved water/nitrogen dual cooled probe system for collecting burnt sample particles at various elevations inside drop tube furnaces, comprising a sample collection probe (15) consisting of at least three concentric metal tubes (1, 2, 3) the inner tube (1) aspirated with coal particles, a first end of the inner tube (1) attached to a mouth (4) of the sample collection probe (15), a second end of the inner tube (1) connected to cyclone (12) follow by filler bags (13a), and a particle aspirating device, the middle tube (2) allowing entry of water through an inlet (9) which water is exited through an outlet (8) by the outer tube (3); a thin capillary tube (7) passing through the inner space of the middle tube (2) for carrying nitrogen gas to said mouth (4) of the sample collection probe (15), a first end of the thin tube (7) attached to said mouth (4), and a second end connected to a nitrogen gas supply source; a traversing mechanism attached to the sample collection probe (15) and consisting of a vertically movable platform (15) supported by two lubricated parallel rod members (19), a vertical screw (16) supported at both ends by one each ball bearing (20), the vertical screw (16) causing said movable platform (15) an upward or downward movement corresponding to rotation of the screw (16) clock-wise or anti-clockwise directions by a controllable d.c motor (18), wherein the thin capillary tube (7) is enabled to spray nitrogen gas at the mouth of the probe to substantially reduce the temperature of the hot gas including further cooling of collectable burnt sample through water circulation, and wherein the construction of the probe and traversing mechanism allows dynamic collection of the sample from multiple points of the furnace where gas phase, and solid-gas phase reactions are continuing and thereby further evaluate kinetics of the reactions.
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