| 摘要 |
Cowl-like scrubber (20) for removing dust generated by a longwall shearer (10) in an underground mining operation. Presently, longwall mining operations are generally limited to mining only in the direction of ventilation air flow through the underground area. This air flow carries the dust forward, away from the miners. Since a longwall shearer (10) generally has two cutter drums, a leading drum (14) and a trailing drum (16), shearer operators may be exposed to dust generated by the trailing drum (16). A major problem is encountered when mining in a direction against the ventilation air flow. To date, no satisfactory dust control technology has been developed which would allow longwall mining in such a direction without severly reducing cutting speeds. The invention provides a practical solution to the longwall mining dust control problem by incorporating a scrubber into the present cowl structures used in conjunction with the cutter drums on a longwall shearer. The cowl-like scrubber (20) of the invention has a housing (21) mounted on the shearer (10) behind a cutter drum. A screen-like barrier (23) covers the air inlet of the housing (21). Water sprays (25 and 26) flush the barrier (23) to prevent plugging. Within the housing (21) is a jet spray air movement section (30). The nozzles (31) of the spray section (30) deliver high pressure, high velocity water droplets. The droplets entrain the dust particles in the dust-laden air and move the resulting dust-laden mist to a mist eliminator (40) where the dust-laden mist is removed from the air. |
