| 摘要 |
<p>A system for the safe handling of pulverized coal, which system includes conventional coal pulverizing and drying equipment, with cyclones and bag filters added, the latter serving to separate the fine coal from the conveying gas (usually air); and explosion suppression and fire suppression systems, both of which later systems include conventional components. All three of these systems (coal preparation, explosion suppression and fire suppression) are so combined as to effect the grinding of raw coal whereby to dry and collect the pulverized coal in a oxygen containing atmosphere without property loss due to explosion or fire. A number of explosion detectors and associated extinguishers are strategically located throughout the coal preparation system so that when pressures slightly above operating pressure being to develop, the explosion extinguishers will be actuated not only to suppress the explosion but also simultaneously to shut down the coal preparation system. Similarly, fire detectors and associated extinguishers are also strategically located throughout the system so that when temperatures slightly above process temperature are sensed the extinguishers will immediately act to suppress the fire and simultaneously shut down the coal preparation system. Preferably the fire suppression system will go into actuation prior to the explosion suppression system and when this happens, the explosion suppression system may be shut down manually if the operator decides it will not be needed, whereby to avoid the expense of having to reload the explosion suppression system.</p> |
