Ningxia Zhongwei project, contracted by CNPC Pipeline Materials and Equipment Corporation. Tunneling diameter of 5m, crossing the strata mainly including muddy clay, silty clay, gravel sand and so on. Komatsu's shield machine is employed. Slurry circulation volume of 500m³ / h. One set of MTP-500 slurry treatment system and one unit of APN15HM30M filter press are used.