Equipment function and the suitable location: used in the intermediate and heavy crude oil heated to the temperature needed for dehydration, low water cut out steamed out of crude oil associated gas, crude oil dehydration and to BS8W purification of crude oil to 0.5% or less of high quality standards. Suitable for onshore oilfield central treatment station or joint station. Working principle: the intermediate and heavy mass low water cut of crude oil by gas fire tube heater dehydrating of crude oil temperature to the required temperature, associated gas isolated after the fog catchers desilt the bullishness of exports out of equipment; Heating and low water cut of crude oil into the electricity after degassing area out of crude oil in remaining water, dehydration after the purification of oil exports out of the oil in the equipment; District heating and electricity area out of water by the water out. Main technical indexes, water cut of crude oil import export crude oil BS8W acuities were 30% and 0.5% or less oily sewage 500 mg/L or less export gas liquid content of 0.1 or less VSGAL MMSCF/technical features: the explosion-proof type burner system, and special transformers, explosion-proof type dehydration the equipment is suitable for 1 class 2. Fire tube removable, easy to repair and maintenance. District heating and electricity intensity of organic combination, make the equipment compact structure, each part function, compared with the conventional drying process can reduce the use and save investment. Based on the oil physical properties determine the panels after processing board type and power supply.