Novel vertical type thermo-siphon reboiler

Abstract

The invention relates to a novel vertical type thermo-siphon reboiler, and belongs to the technical field of chemical equipment. The novel vertical type thermo-siphon reboiler mainly comprises a tube box, wherein a medium inlet and a medium outlet are formed in the tube box; the tube box is provided with a tube plate; a primary liquid uniform distributor is arranged at one end close to the medium inlet, of the tube box; a liquid outlet is formed in the primary liquid uniform distributor; a secondary liquid uniform distributor is arranged inside the tube box; the secondary liquid uniform distributor is in sealed connection with the inner wall of the tube box; and the secondary liquid uniform distributor is positioned between the primary liquid uniform distributor and the outlet of the tube plate. Due to the additionally arranged secondary liquid uniform distributor, a medium can uniformly flow into each tube pass, and the phenomena of tube emptiness and flowing deviation can be avoided.

Description

Technical field [0001] The present invention relates to the technical field related to chemical equipment, in particular to a new type of vertical thermosiphon reboiler. Background technique [0002] Vertical thermosiphon reboiler is one of the reboiler forms used in the tower kettle of chemical equipment. The thermosiphon effect is mainly due to the friction drop between the static pressure head in the tower kettle and the two-phase flow in the reboiler. The result of the driving force generated by the difference in the sum of the static heads. [0003] In the design of the vertical thermosyphon reboiler, only three heat transfer states are allowed in the evaporation tube: liquid-phase flow heat transfer state, supercooled nucleate boiling state and saturated nucleate boiling state. [0004] Mist flow or dry burning area should be absolutely avoided. [0005] In order to avoid the generation of misty flow or dry burning zone, under the condition of certain process conditions, to ens...

AI Technical Summary

Problems solved by technology

[0007] For the reboiler with large equipment diameter and long tube box length, the primary distributor is far from meeting the requirements. Since the primary distributor is close to the nozzle of the equipment and far from the tube sheet, the flow direction of the medium passing through the primary distributor is easy to change. direction, when the velocity of the fluid is high, it is easy to form a circulating vortex at the tube wall of the tube box, and the axial flow is easily transformed into a lateral flow, which not only increases the erosion effect of the fluid on the tube sheet, but also easily causes The uneven distribution of the medium in the process produces the phenomenon of drift in the main pipe

Images