Technology Research on High Pressure Filtering External Spraying System in Fully-mechanized Face

摘要

Considering that present high pressure spray equipments used in fully-mechanized face are very huge, inconvenient, expensive, fragile and of poor effect, a new high pressure filtering external spraying system was developed. The system comprises booster pump, water filtering system, pressure reducing valve and shearer onboard high pressure spraying equipment. By laboratory testing the proper working parameter was: pressure 4MPa, water flow 12.24L/min, valid range 2.85m and maximum range 3.8m. By field test, the total dust removal efficiency at 10m below mining driver was up to 98％, respirable dust removal efficiency at 10m below mining driver was up to 75％. The good effect indicates that the system can inhibit dust concentration effectively, improve sanitary conditions of underground mining working face significantly, which is worth popularizing.