Circulating washing tower

Abstract

The invention relates to a circulating washing tower, which comprises a tower body, wherein a liquid sprayer is arranged above tower plates; liquid storage space is connected with the liquid sprayer by a circulating pump in at least a primary gas-liquid exchange unit and a secondary gas-liquid exchange unit; the adjacent gas-liquid exchange spaces are connected by a downcomer; a unit filling bed is arranged below the liquid sprayer and above the tower plates transversely; a first filling bed is transversely arranged above the highest liquid sprayer and at the position which is lower than a liquid inlet; a second filling bed is arranged in the gas-liquid exchange space at the bottommost part of the tower body, and the liquid sprayer is arranged above the second filling bed; a liquid outlet is connected with the liquid sprayer in the space to which the liquid outlet belongs by the circulating pump; an effluent outlet capable of being opened and closed is formed on a liquid inlet pipe at the bottommost part of the tower body; a gas ascending pipe of which the opening is upward is arranged on each tower plate, and the top of the gas ascending pipe is higher than that of the downcomer arranged in the gas-liquid exchange unit to which the gas ascending pipe belongs; and the liquid flow of the circulating pump is 20 to 25 times that of the liquid inlet.

Description

technical field [0001] The invention relates to a circulation washing tower, which belongs to the field of industrial waste gas treatment. Background technique [0002] Circulating scrubber is a new type of gas purification treatment equipment, which is widely used in industrial waste gas purification and dust removal. In practical applications, the washing liquid is usually injected into the washing tower, and the washing liquid is transported to the top of the tower through the washing liquid circulation pump. form a cycle. At the same time, the exhaust gas is introduced into the washing tower from the bottom of the tower, and then floats upwards and contacts with the washing liquid. During the contact process, the particles, acid gas and other pollutants in the exhaust gas remain in the washing liquid through the exchange with the washing liquid, and are purified. The gas that has been decontaminated is finally discharged into the atmosphere through the top of the tower...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that in the prior art, the washing water ejected by the liquid nozzles of each gas-liquid exchange unit has the same source, and the concentration of the pollutants contained therein is equal, and in the separation tower, the exhaust gas flows from the bottom of the tower to the tower. At the top, the pollutants in it have a gradually decreasing concentration gradient distribution. Therefore, for the gas-liquid exchange unit located at the upper part of the separation tower, the concentration of pollutants in the washing water is even higher than the concentration of pollutants in the exhaust gas, which cannot be realized. Removal of pollutants; and then provide a method in which the concentration of pollutants in the washing liquid in each gas-liquid exchange unit is lower than the concentration of pollutants in the exhaust gas, so that the washing liquid in the gas-liquid exchange unit can carry out Circulating Scrubber for Purification

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