NOVELTY - Gas purifying and recycling device comprises a carbonization kiln, a purifying tank, a Roots blower, a wet gas storage cabinet, a recycling tank. A flue gas outlet of the carbonization kiln is connected with an inlet of the purifying tank. The flue gas outlet of the purifying tank is connected with a flange through a pipeline. A liquid phase separator, a gas purification tower, the Roots blower, a cyclone separator, a gas purifier, a liquid phase purifier, a flue gas inlet and a flue gas outlet of a filtering purifier and a water seal device are connected with each other through a pipeline.    USE - The gas purifying and recycling device is useful for biomass carbonization.    ADVANTAGE - The device overcomes the defects of traditional carbonization devices e.g. free discharge of tail gas, waste of resources and environmental pollution; and ensures pressurization, separation, purification, filter purification and recycling of high purity-gas without any peculiar smell, and hence is ecofriendly.    DETAILED DESCRIPTION - Gas purifying and recycling device comprises a carbonization kiln, a purifying tank, a Roots blower, a wet gas storage cabinet, a recycling tank. A flue gas outlet of the carbonization kiln is connected with an inlet of the purifying tank. The flue gas outlet of the purifying tank is connected with a flange through a pipeline. A liquid phase separator, a gas purification tower, the Roots blower, a cyclone separator, a gas purifier, a liquid phase purifier, a flue gas inlet and a flue gas outlet of a filtering purifier and a water seal device are connected with each other through a pipeline. The drains of the device are respectively connected with a discharging pipe and a wood tar liquid recycling tank. The wood tar liquid recycling tank, the flue gas outlet and the wet gas storage cabinet of the water seal device are connected through a pipeline. The outlet of the wet gas storage cabinet is connected with a drier. The outlet of the drier is connected with a gas pipeline. The device comprises: (a) a coke device, which mainly comprises an upper cone, a cylinder, a lower cone and an outlet pipe. The upper and the lower cones are integrated with the cylinder, and are provided with an air outlet and an air inlet. The air outlet integrated with the cone is inserted into the outlet pipe. The lower end of the cone and the inner cylinder is provided with a heat conducting pipe and a ring. The middle part of the cylinder body is provided with a feed inlet. The lower cone bottom end is provided with an oil discharging pipe; (b) the liquid phase separator, whose upper part is a cylindrical structure, and the lower part is a conical structure. The center of the cylinder body is provided with a central tube. The lower end of the central pipe is provided with a conical cap. The conical cap on the inner cone of the cylinder is uniformly provided with multiple gas cooling pipes. The upper part of the cylinder is provided with a cooling water outlet and an air inlet. The bottom of the cylinder body is provided with a cooling water inlet. The bottom end of the lower conical structure is set with an oil pipe; (c) the gas washing purifying tower, whose body is a cylindrical structure. The internal wall of the cylinder is provided with a lower shower nozzle. The inner wall of the tower body is equipped with multiple inclined swirl baffles, which are connected with the flue gas inlet of the air inlet pipe inserted into the tower body. The air inlet of the upper end of the cover is provided with tapered cap, and the lower end is connected with the oil pipe. The upper and lower parts of the tower body are provided with flue gas outlets. The lower part of the tower body is provided with a manhole, a flue gas inlet and a drain pipe; and (d) the cyclone separator, whose upper part is a cylindrical structure, and the lower part is a conical structure. The top of the cylinder is equipped with an adjustable exit pipe, which is connected with an insertion tube of the cylinder body. The upper side has a gas inlet tube, which is equipped with guide plates. The bottom of the tube has a discharging port.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the gas purifying and recycling device.