Energy saver for boiler

The utility model relates to an energy saver for a boiler. The energy saver is mainly composed of a shell, an ash removing device, a fuel gas circulating tube, a water outlet, a fuel gas outlet, an exhaust port, a separating plate, a fuel gas inlet, a water level indicator, a water inlet and a drain outlet. The whole energy saver is of a cylindrical close structure. The ash removing device is located at the lower end of the shell. The fuel gas circulating tube is arranged at the center position of the shell. One end of the fuel gas circulating tube is connected with the fuel gas outlet, and the other end of the fuel gas circulating tube is connected with the fuel gas inlet. The whole fuel gas circulating tube is of a totally-enclosed structure. The fuel gas outlet and the fuel gas inlet are arranged at the upper end of the whole energy saver, and the fuel gas outlet is opposite to the fuel gas inlet. The fuel gas outlet is separated from the fuel gas inlet by the separating plate. The water outlet is located on the outer edge at the lower end of the shell. The water inlet is located on the edge at the upper end of the shell. The exhaust port is arranged on the top of the whole energy saver. The drain outlet is located below the water inlet. The water level indicator is located below the fuel gas inlet. The energy saver is simple and reasonable in structure and is especially suitable for the current society advocating energy saving and environmental protection.