Combined gas, liquid, and solid three-phase separater

The utility model discloses a three-phase separator in an anaerobic reactor used for sewage treatment. The three-phase separator comprises a main air collecting pipe, a branch air collecting pipe, and an air collecting chamber, wherein, the air collecting chamber is formed by vertical lapping assembling in series of two sections or more than two sections V-shaped plate air collecting units with inverted V-shaped cross sections. The utility model has the advantages of simple structure and light weight, and furthermore, total length of the air collecting chamber can be regulated by increasing and reducing the number of sections of the air collecting units according to the size of the anaerobic reactor; total length of the air collecting chamber can be fine regulated by regulating long holes arranged on the air collecting units; the utility model solves the problem of on-site matching of the three-phase separator and the anaerobic reactor.