| 摘要 |
<p>A system and method for dispensing abrasive particulate material into a stream of air or gas for introduction into the pipe for the purpose of cleaning the pipe and preparing the inner surface for coating or lining. The system comprises an air blower coupled to the pipe, and generates the stream of air or gas, and a three component feed assembly for dispensing the abrasive particulate material. The feed assembly operates at atmospheric pressure and is in fluid communication with each of the pipe and the air blower, and is used to meter the abrasive particulate material into the stream of gas for introduction into the pipe. The system further comprises a shut-off valve that is in fluid communication with the feed assembly, the air blower and the pipe and is cycled to isolate the feed assembly from the air blower during pipe drying and maintenance operations.</p> |
