Regenerated tail gas purification combined tower

Abstract

The invention discloses a regenerated tail gas purification combined tower which comprises a regenerated tower tail gas acid gas removal device and a vertical tower, wherein the vertical tower is connected with the regenerated tower tail gas acid gas removal device through a secondary ejector; the vertical tower is divided into a crystallization section, a deamination section and an acid gas removal section; the acid gas removal section is arranged on the upper part of the deamination section and is connected with the deamination section through a first liquid interrupt disc; the crystallization section is arranged on the lower part of the deamination section; the deamination section is connected with the crystallization section through a conical seal head. Compared with the prior art, the regenerated tail gas purification combined tower has the beneficial effects that ammonia and acid gases entrained in the tail gas can be effectively absorbed, and the equipment is simple to operate and maintain and stable and reliable to operate. The purification process is simplified, the floor space is saved, the regenerated tail gas is injected by utilizing circulating mother liquor, the resistance of the regenerated tail gas is reduced, and the energy consumption is reduced. The ammonia in the tail gas can directly form ammonium sulfate crystals, the combined tower is independent from a coke oven gas ammonia recovery device, and the investment is saved.

Description

technical field [0001] The invention relates to the field of gas purification equipment, in particular to a regeneration tail gas purification combined tower. Background technique [0002] HPF desulfurization is a commonly used desulfurization technology in the coke oven gas purification system, but the tail gas of the regeneration tower contains a relatively high concentration of NH 3 and H 2 S and other acid gases, causing environmental pollution. Under the existing technical conditions, in order to make the desulfurization and regeneration tail gas discharge meet the requirements of the "Coking Chemical Industry Pollutant Discharge Standard GB16171-2012", that is, the exhaust tail gas contains NH 3 ≤30mg / m 3 , H 2 S≤3.0mg / m 3 , It is necessary to add a pickling tower and a water washing tower behind the regeneration tower, so that the tail gas can be treated in turn by the pickling tower and the water washing tower, so that the tail gas can meet the emission standard...

AI Technical Summary

Problems solved by technology

The exhaust gas passes through the packing layers of the two towers in turn, and the pressure loss is relatively large, which increases the burden on the air blower of the regeneration tower and consumes a lot of kinetic energy. The washing liquid of the pickling tower comes from the ammonium sulfate section, and is sent back to the ammonium sulfate after circulating in the tower In the workshop section, the investment in equipment is large, and the mutual coupling between devices is not conducive to production

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