Vacuum rectification tower with satellite-type tower kettle and vacuum rectification method for atmospheric pressure residual oil

A vacuum rectification tower with a satellite tower kettle, comprising:

• a satellite-surrounded vacuum tower kettle, comprising a main tower kettle and a plurality of sub-reactors arranged outside the main tower kettle in a satellite-surrounded mode;
• the main tower kettle is provided with a plurality of first outlets and a plurality of spray inlets, and a top portion of the main tower kettle has an opening;
• each sub-reactor is provided with a second outlet and a first inlet, the spray inlets are connected with the second outlets of each sub-reactor in a one-to-one correspondence, and the first outlets are connected with the first inlets in a one-to-one correspondence;
• wherein, a spray direction of each spray inlet may be adjusted or the spray directions of at least two spray inlets are crossed, and a volume of each sub-reactor is less than a volume of the main tower kettle;
• and
• a rectifying section, located above the main tower kettle, and communicated with the top opening of the main tower kettle, wherein a top portion of the rectifying section is provided with a light component outlet.