Ammonia water preparation and tail gas recovery system and method

Abstract

The invention relates to an ammonia water preparation and tail gas absorption system and method. The system comprises a preparation kettle, a water seal tank and a spray absorption tower; the preparation kettle conveys ammonia tail gas to the water seal tank for first tail gas absorption, and the water seal tank conveys tail gas which is not absorbed to the spray absorption tower for second tail gas absorption; the water seal tank and the spray absorption tower take generated waste water as bottom water of next batch of ammonia water preparation to be conveyed to the preparation kettle. The method comprises the following steps that water and liquid ammonia are introduced into the preparation kettle, stirring is conducted, and ammonia water is prepared; the specific gravity of the ammonia water is monitored; the ammonia tail gas is subjected to tail gas absorption; the absorbed waste water is recycled into the preparation kettle. The ammonia water preparation and tail gas absorption system and method have the advantages of achieving high quality recovery and improving the economic benefit, and the whole preparation process is free of waste water and free of waste gas discharge and achieves real green production.

Description

technical field [0001] The invention relates to a system and method for preparing ammonia water, in particular to a system and method for preparing ammonia water and recovering tail gas. Background technique [0002] In the prior art, the preparation of ammonia water is mostly done manually without automation, resulting in increased production costs, and a large amount of ammonia tail gas volatilized during the preparation process of ammonia water cannot be completely absorbed, which seriously affects the ambient air. [0003] At present, the main methods of ammonia water preparation and exhaust gas absorption are: [0004] Add a certain amount of bottom water to the ammonia water preparation kettle, pass in a certain amount of liquid ammonia, and open the spray absorption tower to absorb the ammonia tail gas. Whether the detection reaches the prepared concentration depends entirely on manual detection with a hydrometer. [0005] Adopt above-mentioned method to prepare amm...

AI Technical Summary

Problems solved by technology

[0005] Using the above method to prepare ammonia water is cumbersome and has certain dangers; the accuracy rate is relatively low; the recovery rate is low, and it has a serious impact on the environment

Images