| 摘要 |
Arrangement for monitoring of cyclones in a PFBC combustion plant comprising a combustion chamber and a cleaning plant with cyclones for separation of dust and ashes from the combustion gases, the combustion chamber and the cleaning plant being located in a pressure vessel and being surrounded by compressed air. According to the invention that portions (44) of a cyclone, which are exposed to erosion damage, and/or an outlet tube (46) from the cyclone for separated dust are surrounded by a gas-tight mantle (48) which, together with the wall of the cyclone (14) and/or the wall of the outlet tube (16), forms a closed space (56). The wall of said mantle (48) has an opening (54), and a device (58) for indicating an air flow through said opening (54) is located at said opening (54). In a preferred embodiment said device (58) consists of a thermocouple, the temperature of which is compared with the temperature of the cyclone (14) and/or the outlet tube (46), the difference between these two temperatures being compared with the value of this temperature difference that prevails under undamaged conditions. |
