Horizontal double-sided radiation vacuum furnace for vacuum deep cut of heavy crude oil

Abstract

The invention discloses a horizontal double-sided radiation vacuum furnace for vacuum deep cut of heavy crude oil. The vacuum furnace comprises a furnace body, two radiation chambers, a convection chamber, radiation hearths, eight groups of furnace pipes, and burners, wherein the furnace body is in a structure shaped like a Chinese character 'Tu'; the convection chamber is positioned above the middle in the furnace body; each radiation chamber is symmetrically divided by a separation wall in the middle to form two radiation hearths; the convection chamber is arranged above a space between the two radiation chambers; the two radiation chambers are separated by a space with two opened ends formed by two radiation furnace walls; each radiation hearth is in a rectangular hollow structure; each group of furnace pipes comprises a group of convection pipes and a group of radiation pipes which are connected by outer oil transfer lines of the furnace body; each part of the convection chamber is horizontally provided with a plurality of rows of convection pipes corresponding to four groups of furnace pipes; two groups of radiation pipes are distributed in the center of each radiation hearth in a manner of longitudinal single-row horizontal pipes; an inlet of each convection pipe is connected with a heating oil product pipeline by a flange; and an outlet of each radiation pipe is connected with an input pipeline of a vacuum tower by a flange.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a horizontal double-sided radiation decompression furnace for heavy crude oil (API ≤ 22) decompression deep drawing (residue reduction TBP ≥ 535°C). Background technique [0002] Atmospheric and vacuum distillation process is a physical fractionation process in which crude oil is heated and then atmospheric / vacuum distillation to obtain the required straight-run gasoline, kerosene, diesel oil, wax oil and vacuum residue. Among them, the decompression unit decompression furnace is the key equipment to realize decompression and deep drawing (reduction of slag TBP≥535℃), and obtain more decompression wax oil. [0003] The vacuum heating furnace rapidly heats the atmospheric residue from the bottom of the atmospheric tower to the outlet temperature of the vacuum deep drawing furnace at 395-445°C, and then quickly enters the vacuum fractionation tower to separate it into gasoline...

AI Technical Summary

Problems solved by technology

[0004] At present, the decompression heating furnace, especially when processing super-heavy unconventional crude oil (API=6-15) and various asphalt materials requires decompression and deep drawing, the coking speed of the furnace tube is fast, which affects the long-term operation (burning after one year shutdown) , or affect the decompression extraction rate and reduce the processing capacity, which will cause unplanned shutdown of the whole plant, damage the production efficiency, increase maintenance costs and energy consumption

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