Special solar energy water jacket heating furnace in vacuum mode for oil field and method of heating crude oil

A special solar energy water jacket heating furnace in vacuum mode for an oil field, comprising a vacuum heating system and a water jacket furnace heating system, wherein the vacuum heating system comprises a steam generator, a vacuum heater and an ejector, and the vacuum heater and the ejector are communicated with each other;

• the water jacket furnace heating system comprises a water jacket furnace, a burner, a flue gas chamber, a U-shaped pipe and a chimney, the flue gas chamber and the U-shaped pipe are arranged inside the water jacket furnace, and an inlet and an outlet of the flue chamber are respectively connected with the burner and the chimney;
• and the vacuum heater is provided with a crude oil inlet and a crude oil outlet, the crude oil outlet is connected with an inlet of the U-shaped pipe, the steam generator is connected with the chimney and absorbs flue gas heat exhausted from the chimney, the steam generator is provided with a first outlet, and the first outlet is connected with the ejector;
• wherein the vacuum heating system further comprises a heat exchanger and a heating water jacket, the heat exchanger is provided with a gas intake pipe, a gas exhaust pipe, a water intake pipe and a water discharge pipe, the vacuum heater is arranged in the heating water jacket, the steam generator is provided with a second outlet, and the second outlet is connected with the gas intake pipe.