Abstract: Abstract:The basic status of Qingshuichuan Power Plant Project Phase II was introduced. The working principle and the features of the pebble coal negativepressure pneumatic conveying system were expounded. The technical and economical indexes of the pebble coal negativepressure pneumatic conveying system and the indexes of the traditional conveying system were analyzed and compared. Combining with actual situation of Qingshuichuan Power Plant Project Phase II, the feasibility to apply the pebble coal negativepressure pneumatic conveying system in Qingshuichuan Power Plant Project Phase II was demonstrated, and the result shows that the system can satisfy the requirement of field safety production, and the problems in pebble coal discharge process, such as coal burning and dust pollution, can be solved effectively.

Key words: Keywords:pebble coal negativepressure pneumatic conveying system, system arrangement, technical parameter, working principle, process flow, technical and economical comparative analysis