A kind of ammonia recovery tower used in ammonium nitrate production equipment

Abstract

The invention discloses an ammonia recovery tower used in an ammonium nitrate production device. The ammonia recovery tower comprises a tower body; the top of the tower body is provided with an ammonia-containing mixed circulating gas outlet; a part, below the ammonia-containing mixed circulating gas outlet, of the tower body is successively provided with a neutralization waste liquid inlet, a gas extraction liquid outlet, a circulating ammonium nitrate solution inlet and an ammonia-containing mixed gas inlet from top to bottom; the bottom of the tower body is provided with an ammonium nitrate solution outlet; a part, between the ammonia-containing mixed circulating gas outlet and the gas extraction liquid outlet, of the tower body is internally provided with a first gas extraction filler section and a second gas extraction filler section; a part, between the gas extraction liquid outlet and the circulating ammonium nitrate solution inlet, of the tower body is internally provided with a circulating gas demister and a washing tower plate successively from top to bottom; a part, between the circulating ammonium nitrate solution inlet and the ammonia-containing mixed gas inlet, of the tower body is internally provided with a neutralization filler section. The ammonia recovery tower can effectively recover ammonia in neutralized condensed fluid, achieves zero discharge, has no pollution to the environment, can increase the stability and reliability of the system operation, saves energy and reduces consumption.

Description

technical field [0001] The invention belongs to the technical field of ammonium nitrate production equipment, and in particular relates to an ammonia recovery tower used in ammonium nitrate production equipment. Background technique [0002] The ammonium nitrate ammonia recovery tower is one of the important equipment for ammonium nitrate production. The ammonia content in the neutralization condensate existing in the existing industrial production of ammonium nitrate is high and cannot be recycled. The ammonia in the liquid is extracted, so that the neutralized condensate can be recycled or meet the discharge standard. [0003] The existing ammonium nitrate ammonia recovery tower is a high-corrosion equipment with a high temperature of about 180 to 185°C and a pressure of about 3.2 to 3.5 bar (G). The operating conditions are harsh, the operation is unstable, the operation flexibility is small, and the gas-liquid separation effect is poor. It is very easy to carry liquid. ...

AI Technical Summary

Problems solved by technology

[0003] The existing ammonium nitrate ammonia recovery tower is a highly corrosive equipment with a high temperature of about 180-185°C and a pressure of about 3.2-3.5 bar(G). The operating conditions are harsh, the operation is unstable, the operation flexibility is small, and the gas-liquid separation effect is poor. It is very easy to carry liquid. The gas entering the washing tower is superheated gas, which must be saturated and then neutralized and washed in the packed tower. The neutralized gas is seriously carried with liquid, and the separation efficiency is low. The ammonium nitrate content of the washing tower is relatively high, and the neutralization and condensation The liquid has no recovery value, or must undergo secondary treatment to achieve zero discharge

[0004] In the existing ammonium nitrate ammonia recovery tower, only a section of neutralization section packing is designed, which is naturally separated from the washing tower. There are serious problems with liquid accumulation, high ammonium nitrate content in the washing tower, and the neutralization condensate has no recovery value. defect

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