Abstract: Fluidized bed heat exchanger with a chamber (24), comprising at least one solid particles inlet port (22) at least one solid particles outlet port (30), arranged at a distance to the at least one inlet port (22), means (46) for introducing a fluidizing gas from a bottom area (24b) of said chamber (24) into said chamber (24), wall-like heat transfer means (28) in its lower part, extending in a main flow direction of the solid particles on their way from the inlet port (22) to the outlet port (30), substantially parallel to each other, with a space (C) between adjacent heat transfer means (28), at least one baffle (50,52) in its upper part, extending substantially perpendicular to the heat transfer means (28), downwardly from a chamber ceiling (24c), with its lower end at a distance to the heat transfer means (28) and comprising extensions (E), protruding into the space (C) between adjacent heat transfer means (28), and couplings (B) to mechanically connect the said heat transfer means (28) to said extensions (

Abstract: A fluidized bed heat exchanger with a chamber (24) comprises a solid particles inlet port (22), a solid particles outlet port (30), arranged at a distance to the inlet port (22), means (46) for introducing a fluidizing gas from a bottom area into the chamber (24). The heat exchanger has furthermore several heat exchange tubes (28) being arranged at a distance to each other. The heat exchange tubes (28) are each arranged in a meandering fashion and a wall-like pattern and extend substantially parallel to the main flow direction of the solid particles on their way to and through the outlet port (30).

Abstract: Fluidized bed apparatus, comprising a circulating fluidized bed reactor with at least one outlet port at its upper part, wherein said outlet port allows a mixture of gas and solid particles exhausted from the fluidized bed reactor to flow into a number (n) of associated separators for separating solid particles from said gas, a number (n) of means to transfer said separated solid particles from said (n) separators into a number (up to n) of discrete fluidized bed heat exchangers (24.1, 24.2, 24.3), and return means to transport at least part of said solid particles back from said discrete fluidized bed heat exchangers (24) into the circulating fluidized bed reactor, wherein the number (up to n) of discrete fluidized bed heat exchangers (24.1, 24.2, 24.3) are mechanically connected to provide one common fluidized bed heat exchanger (24)mwith water cooled intermediate walls (24i) between adjacent discrete fluidized bed heat exchangers (24.1, 24.2, 24.3).

Abstract: The tension in a moving web of material is measuring using a measuring roller or cylinder. This tension is repeatedly compared to a threshold value. If the measured value deviates from the threshold value beyond a certain amount, this is used as an indication of web tear or breakage.

Abstract: The invention relates to a method for producing a longlife, resistant spark plug for internal combustion engines. The electrode (16), according to the invention, of the spark plug is assembled from a plurality of initial parts: an initial part for a corrosion-resistant shell (31'), an initial part for a core (33') of high thermal conductivity, and an initial part for an erosion-resistant region (32'). These initial parts are jointly impact-extruded to form an electrode blank which is formed into the center electrode (16) by machining its head (51) and its region on the combustion-chamber side. Electrodes which are especially highly stressed are given a fourth initial part, which is also to be impact-extruded, consists of highly erosion-resistant material and is still arranged on the combustion-chamber side in front of the erosion-resistant region (32'). The electrode (16) can be used as a center electrode (16), but can also be used, if necessary, as an earth electrode after an embossing and bending process.