Collector and collector set for packed tower

Abstract

The invention discloses a collector and a collector set for a packed tower. The collector comprises reverse-shading ring sheet sets in a layered structure, wherein each layer of reverse-shading ring sheet is in a hollow inverted cone table shape, outer edges of the reverse-shading ring sheet sets decrease from top to bottom in a layer-by-layer manner, projections of the reverse-shading ring sheet sets at adjacent layers are overlapped with one another from top to bottom, the two layers of adjacent reverse-shading ring sheet sets are fixedly connected with each other by virtue of connecting plates, annular shading caps are arranged above the annular top of the reverse-shading ring sheet at the uppermost layer at intervals, are used for shading and are welded with a tower wall, a liquid collection bucket is arranged on a hollow hole in the reverse-shading ring sheet at the bottommost layer in a communication manner, and the cone angle of each layer of reverse-shading ring sheet is 120-180 degrees. The collector is easy to manufacture and convenient to mount and can realize 360-degree complete coverage, complete liquid collection and adequate mixing.

Description

technical field [0001] The present invention relates to a column internals with the performance of liquid collection and gas redistribution, in particular to a collector for packed towers. Background technique [0002] Regardless of the structure of the current collector, it is basically classified as a shroud type. The main problem is that the liquid is not completely collected, the liquid is dropped from the upper layer of the filler, and the liquid in some angle ranges along the length of the flap and splashes to the liquid shroud 1 The liquid on the B side cannot be completely collected into the liquid guide groove 2, such as figure 1 As shown in the direction of the middle arrow, the liquid collection volume is small, the cross-sectional area of ​​the gas channel is small (just a long narrow slit), the air resistance is large, and the large axial dimension of the tower increases the cost of the tower. figure 1 Middle 3 is the connecting plate. [0003] There are alway...

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Problems solved by technology

[0003] There are always liquids within a certain angle range along the length of the baffle and the liquid splashed on the back of the baffle that cannot be completely collected, and affect the uniformity of gas distribution. The resistance will increase), and the axial dimension is large, which increases the investment cost of the tower

[0004] The Chinese patent No. 96205156.X discloses "a pagoda-type liquid collector with a layered structure", which is mainly composed of a layered umbrella cap group and a liquid collection box. The problem with this device is that the top layer of the umbrella The structure is large and there is no gas channel, the gas channel is only concentrated in the space between the vertical wall of the liquid collection box and the outer diameter of the umbrella cap, the gas resistance increases, causing gas-liquid interference to form mist entrainment, making the gas distribution in the entire tower section uneven, The single-layer umbrella cap group structure is only suitable for small tower diameters. For large tower diameters, whether it is the umbrella structure on the top floor or the hollow umbrella structure on other floors, the length of its conical generatrix increases due to the increase in diameter. As a result, the difficulty of machining increases. In addition, for large tower diameters, whether it is to increase the number of layers of umbrella caps or increase the diameter, the axial dimension of the tower will increase, which will increase the cost of the tower. At the same time, the uneven gas distribution will be more serious.

The problem that this device exists is: the collection liquid is incomplete, is the Achilles' heel of the collector, and the liquid receiver that this patent adopts is the annular groove that arranges at intervals, and in order to make the free cross-sectional area of ​​the collector not less than 50%, (to ensure The pressure drop should not be too large), so the interval between the tanks should not be too small, so more liquid will leak through. This liquid collector is not suitable for collection and distribution. In addition, the structure of the liquid collector determines the relationship between the liquid receiver and The gas channel becomes a pair of shields, the liquid collecting surface is larger, the gas channel is smaller, and the resistance increases, and vice versa

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