Ammonia absorption device

Abstract

The invention discloses an ammonia absorption device, comprising a multi-stage ammonia absorption tower, a heat exchanger, ammonia absorption circulating tanks, a process water pump and an ammonia storage tank, which form a closed circulating system through a process pipeline. The multi-stage ammonia absorption tower is composed of at least two stages of single ammonia absorption towers, wherein an ammonia outlet and an ammonia inlet of each single ammonia absorption tower are communicated with each other through a pipeline. Ammonia absorption liquid in each single ammonia absorption tower partially flows back into the corresponding ammonia absorption circulating tank for continuous circulating absorption, and partially flows back in the adjacent ammonia absorption circulating tank for replenishing absorption liquid, thereby implementing countercurrent circulating absorption of ammonia. The whole ammonia absorption device is at a continuous ammonia absorption circulating state, can automatically continuously discharge ammonia absorption recycling liquid with qualified concentration and high temperature, and has the characteristics of high ammonia absorption rate, simple operation and energy conservation and emission reduction.

Description

technical field [0001] The invention belongs to the field of ammonia absorption devices, in particular to a multi-stage circulation ammonia absorption device. Background technique [0002] The process of ammonia zinc oxide is a cycle process of ammonia, using ammonia water for zinc complexation, using ammonia distillation to realize the crystallization of zinc ions, and the ammonia gas from steam ammonia is converted into ammonia water through ammonia absorption, and then used as zinc ammonia complexation solution for the complexation of zinc. The maximum energy consumption of the ammonia-based zinc oxide process is the steam used for ammonia distillation. In a high-efficiency ammonia distillation device, the steam energy consumed by heating the zinc-ammonia complex solution from room temperature to boiling accounts for 50% of the evaporation consumption of the entire process. [0003] The traditional ammonia-based zinc oxide uses a high-level ammonia absorber to absorb amm...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a new type of ammonia absorption device, solve the waste of heat generated during the use of the traditional high-level ammonia absorption device and the insufficient absorption of ammonia gas, and the process cost of step-by-step transfer. High and low work efficiency

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