NOVELTY - The flame arrester comprises a shell, and a water gauge. A bottom of the shell has poured sealing water, and is equipped with a sealing water inlet (1) and a sealing water outlet. The biogas inlet gas pipe is arranged at a lower-middle part of the shell, and stretches below the liquid level of the sealing water after entering the shell. An upper part of the shell is equipped with a separator (5) and a water pipe (10). The separator is: equipped with a stainless steel cloth fire resistance padding (8); fixed in the upper-middle part of the shell using a support.    USE - The flame arrester is useful for separating biogas and water.    ADVANTAGE - The flame arrester is capable of effectively separating the biogas and water with reduced energy consumption in a safe manner.    DETAILED DESCRIPTION - The flame arrester comprises a shell, and a water gauge. A bottom of the shell has poured sealing water, and is equipped with a sealing water inlet (1) and a sealing water outlet. The biogas inlet gas pipe is arranged at a lower-middle part of the shell, and stretches below the liquid level of the sealing water after entering the shell. An upper part of the shell is equipped with a separator (5) and a water pipe (10). The separator is: equipped with a stainless steel cloth fire resistance padding (8); fixed in the upper-middle part of the shell using a support; and equipped with a cooling water inlet (14) and a cooling water outlet. The arrester is made of a sealed stainless steel object. The water pipe is equipped with a screw nozzle with temperature control function. A top of the shell is equipped with a biogas outlet and an anti-explosion port. An inner part of the shell is composed of a group of stainless steel tubes with transparent upper and lower parts.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a flame arrester.    Sealing water inlet (1)    Separator (5)    Stainless steel cloth fire resistance padding (8)    Water pipe (10)    Cooling water inlet. (14)