Low-resistance efficient column tray

Abstract

The invention provides a low-resistance efficient column tray. Cover hoods are welded on column plates; outer layer liquid blocking sieve plates with sieve holes are arranged at the peripheries of the outer parts of the side walls of the cover hoods above the column plates for secondary gas-liquid dispersion mass transfer; a row of small liquid distribution holes are formed in the side surfaces of the cover hoods, close to the column plates; a liquid collecting groove is formed above the cover hoods; the cover hoods protrude out of the plane of the column plates by a certain height so as to prevent solid substances from blocking the cover hoods and the sieve holes; an oblique plate is arranged at the part corresponding to the small liquid distribution holes in each cover hood; a narrow gap is formed between the oblique plate and the side walls of the cover hoods for distributing a liquid; a plurality of sieve holes are also formed in the side walls of the cover hoods at the lower parts of the column plates; meanwhile, an inner layer liquid blocking sieve plate is arranged in the side wall of the cover hood below the column plates for secondary gas-liquid dispersion mass transfer; a plurality of liquid exhaust holes are formed in the bottom of the cover hoods for liquid distribution and dropping, and meanwhile play a role of liquid sealing. The low-resistance efficient column tray has the advantages that the gas flow resistance is low; the gas-liquid contact effect is good; the antiblocking effect is good; the column plate efficiency is high; the manufacture and running costs are low; the column tray is convenient to overhaul.

Description

technical field [0001] The invention relates to gas-liquid heat transfer, mass transfer and dust washing equipment in chemical engineering, specifically a low-resistance high-efficiency tray for chemical mass transfer, washing and separation. Background technique [0002] Gas-liquid mass transfer internals are divided into two categories: plate tower and packed tower. The resistance of plate tower is generally 8-10 times that of packed tower. Therefore, in the field where the resistance drop requirement of the whole tower is small, only packed tower can be used. Trim. The advantage of packed tower internals is that the gas flow resistance is small and the mass transfer efficiency is high. The disadvantage is that when the liquid flow rate is small, it is difficult to evenly distribute the liquid. It is often due to insufficient wetting of the packing and the gas-liquid cannot be forced to contact the mass transfer. For washing and dust removal The efficiency of the working ...

AI Technical Summary

Problems solved by technology

The disadvantages of this structure are: firstly, the gas-liquid flow mode is still a cross-flow mode, and the improvement of the plate efficiency is restricted; secondly, the gas-liquid kinetic energy is transferred in parallel flow process, the energy loss of the gas is large, and the resistance of each tray is relatively large , generally at 400-600Pa, such trays include New-Vst new vertical sieve trays, CTST three-dimensional mass transfer trays, CJST radial side jet trays, JCPT trays, etc.

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