NOVELTY - A two-phase integrated anaerobic digestion reactor comprises main body including a water distribution zone (I), acid production zone (II), methylene production zone (III) and three-phase separation zone (IV) from bottom up. The water distribution zone comprises empty exit (1), up-flow column tray type water distributor (3), inverted cone body (26), and lower-short cylinder (27). The methylene production zone includes whirl stream energy-dissipation device (6), whirl stream liquid intake window (7), cone-shaped cylinder body (9), and methane production reacting chamber (10).    USE - Two-phase integrated anaerobic digestion reactor.    ADVANTAGE - The reactor is compact in structure, convenient in disassembling, good in overall flow pattern, small in dead zone, high in volume loading, efficient in processing, and strong in loading and shock-resistant capacity.    DETAILED DESCRIPTION - A two-phase integrated anaerobic digestion reactor comprises a main body including a water distribution zone (I), an acid production zone (II), a methylene production zone (III) and a three-phase separation zone (IV) from bottom up. The water distribution zone comprises an empty exit (1), a feeding tube (2), an up-flow column tray type water distributor (3), an inverted cone body (26), a lower-short cylinder (27), a reflux pipe (28) and a bottom plate (29). The lower-short cylinder is provided with the empty exit, the reflux pipe, the feeding tube and the up-flow column tray type water distributor. The lower end of lower-short cylinder is set with the bottom plate. The terminal end of the feeding tube is provided with inverted cone body. The acid production zone includes a straight cylinder body (4), an acid production reacting chamber (5), a first gas collection chamber (8), a first air discharge chamber (24) and a reflux pipe (25). The inner-lower part of the straight cylinder body is provided with the acid production reacting chamber, the upper part is provided with the first gas collection chamber, and the straight cylinder body of the first gas collection chamber is equipped with first air discharge chamber (24). The straight cylinder body of acid production reacting chamber is equipped with reflux pipes (25). The methylene production zone includes a whirl stream energy-dissipation device (6), a whirl stream liquid intake window (7), a cone-shaped cylinder body (9), a methane production reacting chamber (10) and a reflux pipe (23). The lower part of cone-shaped cylinder body is extended to the straight cylinder body and connected with the upper end of the straight cylinder body. The inside of the cone-shaped cylinder body is equipped with the methylene production reacting chamber. The lower end of the cone-shaped cylinder body is equipped with the whirl stream liquid intake window and the whirl stream energy-dissipation device. The cone-shaped cylinder body is provided with several reflux pipes. The three-phase separation zone includes a sediment zone (12), a double-inverted-trumpet three-phase separator (13), a cover plate (16), a second gas discharge pipe (17), a second gas collection chamber (18), an upper-short cylinder (19), a saw-toothed overflow weir (20), a drain piper (21) and a reflux pipe (22). The upper part of double-inverted-trumpet three-phase separator comprises a straight pipe (14). The lower end of the straight pipe is equipped with a double-inverted-trumpet opening (11). The straight pipe is provided with pressure balance holes (15). The inner of the upper-short cylinder is equipped with the sediment zone and the second gas collection chamber from the bottom up. The saw-toothed overflow weir is installed between the sediment zone and the second gas collection chamber. The drain pipe is connected with the saw-toothed overflow weir, and the reflux pipe is connected with the sediment zone.    DESCRIPTION OF DRAWING(S) - The drawing is a perspective view of a two-phase integrated anaerobic digestion reactor.    Empty exit (1)    Feeding tube (2)    Up-flow column tray type water distributor (3)    Straight cylinder body (4)    Acid production reacting chamber (5)    Whirl stream energy-dissipation device (6)    Whirl stream liquid intake window (7)    First gas collection chamber (8)    Cone-shaped cylinder body (9)    Methane production reacting chamber (10)    Double-inverted-trumpet opening (11)    Sediment zone (12)    Double-inverted-trumpet three-phase separator (13)    Straight pipe (14)    Pressure balance holes (15)    Cover plate (16)    Second gas discharge pipe (17)    Second gas collection chamber (18)    Upper-short cylinder (19)    Saw-toothed overflow weir (20)    Drain piper (21)    Reflux pipe (22)    Reflux pipe (23)    First air discharge chamber (24)    Reflux pipe (25)    Inverted cone body (26)    Lower-short cylinder (27)    Reflux pipe (28)    Bottom plate (29)    Water distribution zone (I)    Acid production zone (II)    Methylene production zone (III)    Three-phase separation zone (IV)