Graded type dual-hole-diameter sieve plate tower

Abstract

The invention discloses a graded type dual-hole-diameter sieve plate tower. The graded type dual-hole-diameter sieve plate tower comprises a tower body adopting a hollow cylindrical structure, wherein sprinkling layers are arranged at the upper part of the tower body, and a pulp pond is arranged at the lower part of the tower body; a flue gas inlet is formed in the tower body between the pulp pond and the sprinkling layers; a flue gas outlet is formed in the topmost end of the tower body; two or more sieve plates which are horizontally arranged are arranged in the tower body between the flue gas inlet and the sprinkling layers; gas through holes and liquid through holes are formed in each sieve plate; the hole wall of each liquid through hole is higher than the upper surface of the corresponding sieve plate, and the liquid through holes are distributed in the periphery of the outer side of each sieve plate; and the gas through holes are distributed in the inner side of each sieve plate. According to the graded type dual-hole-diameter sieve plate tower disclosed by the invention, a graded type structure is adopted, the hole diameters of the gas through holes are sequentially declined from bottom to top, the hole wall heights of the liquid through holes are sequentially increased from bottom to top, the pressure drop is sequentially increased from bottom to top, and the processing load is sequentially declined from bottom to top, so that the flue gas can be accelerated when passing through the sieve holes, pulp forms high-speed small liquid drops, and gas-liquid turbulence is strengthened; and besides, the gas-solid contact area can be increased, and inertial impaction kinetic energy of the gas-solid contact can also be enlarged, so that the dust removing efficiency achieves 50% or above.

Description

technical field [0001] The invention relates to the technical field of gas-liquid contact devices, in particular to a hierarchical double-aperture sieve tray tower. Background technique [0002] The sieve tray column is one of the simplest and most economical gas-liquid contact columns. Its advantages are simple structure, low metal consumption, low cost; small liquid level drop on the plate, small gas pressure drop; large production capacity, uniform gas dispersion, and relatively high mass transfer effect. Its disadvantage is that the operation flexibility is small, and the screen holes are easily blocked. [0003] The working state of the sieve tray column has a great influence on the efficiency of the sieve tray. The main state of the sieve plate column is the foam state and the spray state: in the foam state, the gas is a discrete phase, and the liquid is a continuous phase, and the absorption effect is more significant at this time. However, when the gas velocity ri...

AI Technical Summary

Problems solved by technology

However, when the gas velocity rises to a certain value, the gas changes from the original discrete phase to the continuous phase, and the liquid changes from the original continuous phase to the discrete phase, and the transition from the foam mode to the spray mode is completed at the same time as the phase inversion , resulting in a significant decrease in gas absorption efficiency

At the same time, problems such as channeling and mist entrainment in the foam state have seriously hindered the further large-scale application of the sieve tray column

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