Abstract: According to one embodiment, an anomaly detection apparatus includes a processing circuit. The processing circuit is configured to: acquire measured values from sensors installed in a system, a first function, a first threshold, and a second function to output a second threshold; generate the predicted values based on the measured value and the first function; detect that a deviation between the measured values and the predicted values exceeds the first threshold; calculate the feature quantities based on the measured values; and determine whether a number of consecutive times is equal to or larger than the second threshold to detect an anomaly or a sign of the anomaly.

Abstract: An incinerator of sectional structure has an airpipe for sending combustion air into a furnace. The airpipe is a straight pipe tapered off at end portion and closed by a plug of castable refractory material filled up in the tapered portion to improve the durability under high temperature circumstances. The airpipe is also inserted into a furnace through a hole opened on an upper furnace wall, and a seal member of easy spallable and castable refractory material fills up the gap between the airpipe and the hole to make easy exchange of the airpipe possible.