| 摘要 |
PROBLEM TO BE SOLVED: To prevent a sampling tube from being plugged with a deposit such as clinker and a compound of low melting point, and to install an exhaust gas quick-cooling means of high-cooling performance. SOLUTION: This sampling tube 2 has the sampling tube 3 having a large- diametral tube part 3A, a small-diametral tube part 3B and a reducer tube part 3C, and for forming an inside diameter of the small-diametral tube part into an inside diameter for bringing a flow condition of sampling exhaust gas flowing in the small-diametral tube part into a turbulent flow, and has an exhaust gas quick-cooling cooler 6 provided with the small-diametral tube part and a cooling jacket 15 surrounding the peripheral of the small-diametral tube part. A large-diametral portion of the sampling tube is formed into double tube structure comprising the large-diametral tube part and an outer tube provided in an outside of the large-diametral tube part to cool the large-diametral tube part by cooling water. A backwash device is provided to supply compressed gas into the sampling tube, so as to blow back the deposit such as the clinker and the compound of low melting point in the sampling tube into an inside of a gas flue. COPYRIGHT: (C)2004,JPO
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