| 摘要 |
<p>A materials handling assembly feeds bulk granular material using fan-driven gas suction or pressure action. The fan (8) effluent air is surrendered, heated and compressed to a drier (22, 44, absorption column 35) as a heating medium. The blower (8) discharges air via a compressor stage comprising e.g. a piston compressor, a worm compressor, a by-pass blower or a roots blower pump. The assembly has three or more regulator circuits: a vacuum regulator circuit (20) with a pressure sensor (1) and a vacuum regulator valve (2); an air volume regulator circuit with a frequency rectifier (28) and/or a return air feed temperature regulator (19); an effluent air temperature detector (27) and a frequency-controlled motor (10); and an effluent air temperature regulator circuit (18) with a drying air temperature (15) and cooling water regulator valve (14). Blower effluent air passes through a cooling unit (13). The drier assembly is constructed as a single- or multi-stage drying funnel (22), the lowest zone having a supplementary air drier (24). Blower incoming air is pre-dried by an absorption drier (35). Hot blower exhaust air may be diverted via valves (36, 41) to the absorption columns (35) and/or the material drier (22, 44) and/or compressed air line for drying.</p> |
