| 摘要 |
The invention pertains to a detector arrangement (1) in- cluded in a preventive safety sys- tem that can be used within a process in which loosely-formed process material is produced in a first unit (2) and transported (3) to a receiving, second unit (2), wherein the treatment to which the material is subjected in said first unit is liable to produce one or more discrete particles which have a temperature sufficiently high to initiate fire and/or explo- sion within at least the second part or unit (2). The necessary transportation of the loose ma- terial between the first unit (1) and the second unit (2) is ef- fected along a path which in- cludes a stabilizing zone (7), a high-temperature particle indicat- ing zone (8), and an extinguish- ing zone (9), wherein the indi- cating zone includes one or more particle sensors (10). The sensors coact with an indicating and activating unit (12) such that indication by th e sensors of the presence of a high-temperature particle in said indicating and activating unit will activate a device which is associated wi th the extinguishing zone and which functions to deliver an extin- guishing agent and/or to remove particles (15). The sensing lobes of two sen sor units (105, 107) cover a cross section of the transp ortation path. The indicating and activating unit(12) is adapted to evaluate the sens ed intensity from each of said sensor units (105, 107) and to coordinate received intensity-dependent signals so as to calculate and estab lish on the basis thereof the liability of the particle to initiate fire and/or explosion.
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