Device for removing coal ash from coal bed gas

The utility model relates to a device for removing coal ash from coal bed gas. The device comprises a tank body (10), wherein an intermediate partition (13) is arranged in the tank body (10), a gravity settling chamber (20) is formed in the space below the intermediate partition (13), a cyclone separator (30) is arranged in the gravity settling chamber (20), the cyclone separator (30) is arranged in the tank body (10), one end of the cyclone separator (30) extends above the intermediate partition (13), and the other end of the cyclone separator (30) penetrates out from the bottom of the tank body (10). Compared with the prior art, the device has the advantages of clever design and the like and has a wide application prospect, the dust removal efficiency is improved, and impurities such as the coal ash and a small amount of water which are contained in the coal bed gas can be efficiently removed.