TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Generator: In the biomass energy resource gasifying generator, the two-stage spray tower is composed of a first-stage spray tower and a second-stage filtering spray tower, the first-stage spray tower is structure formed by two cylinders connected in series; the upper end of the first cylinder and the lower end of the second cylinder of the spray tower formed by two cylinders connected in series are communicated through a pipeline; the lower parts of the first and second cylinders are placed into a water tank; the upper end of the second cylinder is communicated with the lower end of the second-stage spray tower through a pipeline; a spray head is mounted on upper part of each of the first-stage spray tower and the second-stage filtering spray tower; each spray head is connected with a diving pump in a water circulating pool through a pipeline. The upper part of the two-stage filtering spray tower is connected with upper end of the third-stage dust collector cyclone through a pipeline towards the tangential direction of the lateral surface thereof; the upper end of the dust collector cyclone is cylindrical, while the lower end thereof is conical. The gas outlet of the vacuum pump is communicated with the lower part of the fourth-stage filter through a connecting pipeline; a vertically upward emptying pipe is connected to the middle part of the connecting pipeline; a horizontal return pipe is located between the emptying pipe and the gas inlet end of the vacuum pump, and a vertically upward fire test pipe is set on the return pipe. Moreover, the upper part of the fourth-stage filter is connected into the cylindrical five-stage steam-water separation flame arrester through a pipeline; the pipeline connected to the fifth-stage steam-water separation flame arrester is bent downwards and connected to the lower part; the outlet of the pipeline is a flare opening whose the edge is saw-shaped; water is filled into the fifth-stage steam-water separation flame arrester, and the water level is higher than the flare opening. The gas container is composed of an external cylinder and a liner placed in the external cylinder; water is filled between the inner container and the external cylinder.