Small integral heat supply system for supplying heat to oilfield stations

The invention provides a small integral heat supply system for supplying heat to oilfield stations. The small integral heat supply system comprises a cuboid skid-mounted seat. A heating water heater is fixedly connected into the cuboid skid-mounted seat, a power distribution cabinet is arranged above the heating water heater, a water supplementing pump is fixedly arranged at the right edge of the heating water heater, a first circulating water pump and a second circulating water pump are fixedly arranged above the water supplementing pump, and a dirt remover is fixedly arranged below the water supplementing pump; a hot water outlet and a return water inlet are formed in a side of the heating water heater, the hot water outlet is connected with a circulating water outlet pipeline, the return water inlet is connected with an intra-station hot return water pipeline, and a water supplementing pipeline is connected with the return water inlet; the intra-station hot return water pipeline is connected to an inlet of the dirt remover by a first gate valve and an automatic return water switch valve. The small integral heat supply system has the advantages that the small integral heat supply system is short in construction period and easy to remove, the automatic return water switch valve can be automatically switched off when the circulating water pumps are shut down due to failures, and accordingly safety accidents due to the fact that hot return water flows out of overflow pipes can be prevented.