Tower feeding distributor

Abstract

The invention relates to a tower feeding distributor, comprising a feeding inlet, a splitter and a shutter flow channel. The splitter is of a fan-shaped structure, comprising an arch-shaped guide plate, upper and lower cover plates and a support end plate. The shutter flow channel is a horizontal channel with a gradually decreasing flow area, and an inlet end of the shutter flow channel is fixed on a support end plate of the splitter. At both sides of the shutter flow channel, 4-12 groups of blades are arranged in order from the inlet end, and directions of the blades on the two sides are staggered to form an outlet between the adjacent blades. The feeding distributor can carry out both uniform distribution on the gas-liquid mixing feed for two times and gas-liquid separation on the gas-liquid mixing feed for two times, and generate airflow collision by utilizing an inertial force of the gas phase, thereby basically eliminating the entrainment of liquid drop by gas. Non-uniform gas distribution caused by a sudden change in feeding amount is avoided. High uniform rising gas distribution is realized. Meanwhile, a tower diameter width is fully used to ensure the feeding distributor to be low and to effectively save the space.

Description

technical field [0001] The invention relates to a gas-liquid two-phase feeding device for a tower, in particular to a vane-type single-tangential or double-tangential feed distributor. More specifically, it belongs to a feed distributor for preventing gas and mist entrainment, which is especially suitable for the deep drawing treatment of the vacuum tower of the atmospheric and vacuum distillation device of the petroleum refinery. technical background [0002] The tower is one of the most important equipment in the petroleum refinery, in order to realize the full contact between the gas-liquid or liquid-liquid two phases, and achieve the purpose of interphase heat transfer and mass transfer. [0003] The vacuum tower of the atmospheric and vacuum distillation unit in the petroleum refinery is a vacuum distillation method to obtain more light fraction oil from the atmospheric residue and ensure the <500°C fraction content ≯5% in the vacuum residue Gas-liquid, liquid-liqui...

AI Technical Summary

Problems solved by technology

At present, most of the feed distributors for vacuum towers that are widely used in the industry are straight pipe openings or through various settings for the diversion of the feed stream to complete the uniform distribution of the feed stream. Since the feed is opened at different positions The outflow rate of the hole is different, and such a distributor cannot meet the requirements of uniform distribution of materials; moreover, the feed of the vacuum tower is a gas-liquid mixed mist flow containing 60% to 70% liquid phase, and the gas after the feed is distributed The entrainment of mist is relatively serious, which has a great impact on the product quality of the side line at the bottom of the tower

[0005] Although the existing double tangential feed distributor can meet the purpose of uniform distribution, there are disadvantages such as large gas swirl flow and many vortices in the ascending gas of the distributor, serious entrainment of rising gas mist, and large pressure drop of gas flowing through it; foreign countries Although the double-row vane-type feed distributor has a small process pressure drop, which is beneficial to the deep-drawing operation of vacuum distillation, there are problems such as uneven air distribution and serious droplet entrainment, which seriously affect the production of distillate oil in vacuum distillation. Product quality, thus restricting the vacuum distillation deep drawing treatment, the vacuum distillation extraction rate cannot be improved

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