Digital online ammonia water concentration adjustment system and method thereof

Abstract

The invention provides a digital online ammonia water concentration adjustment system and a method thereof. The system includes: a low-pressure ammonia washing tower and a high-pressure ammonia washing tower, an ammonia washing outlet of the low-pressure ammonia washing tower finally leads an ammonia-containing substance in the low-pressure ammonia washing tower to an inlet of a 2# ammonia water tank, and an outlet of the 2# ammonia water tank finally leads the ammonia-containing substance in the 2# ammonia water tank to an inlet of an ammonia water vehicle; an ammonia washing outlet of the high-pressure ammonia washing tower finally leads the ammonia-containing substance in the high-pressure ammonia washing tower to an ammonia washing inlet of the low-pressure ammonia washing tower. According to the invention, a part of dilute ammonia water is split from the ammonia washing outlet of the high-pressure ammonia washing tower to further improve the concentration of concentrated ammonia water and increase the yield of concentrated ammonia water, the added split ammonia water is loaded in a hydrolysis tower idle for urea loading, and during ammonia water loading, the opening degree ofan adjustment valve is adjusted to achieve precise control of the ammonia water truck loading concentration.

Description

technical field [0001] The invention relates to the technical field of ammonia water concentration for vehicle loading, in particular to a digital online ammonia water concentration adjustment system and a method thereof. Background technique [0002] Such as figure 1 As shown, the purge gas from the synthesis system (flow rate 3000-8800Nm 3 / h, NH 3 : 5~6%, H 2 : 63%, N 2 : 21%, CH 4 : 5~6%, Ar: 5~6%) enters from the lower part of the high-pressure ammonia washing tower, contacts with the desalted water (1400~2300kg / h) added at the top, and the ammonia in the purge gas is absorbed by the desalinated water and becomes Dilute ammonia water, the concentration range of ammonia water is 9-15%, and the purge gas after washing enters the membrane tube for hydrogen recovery. [0003] Release air from liquid ammonia spherical tank (flow rate 0~1000Nm 3 / h, mainly containing NH 3 : 45~65%, the rest is H 2 , N 2 、CH 4 , Ar), liquid ammonia loading and releasing air (flow ra...

AI Technical Summary

Problems solved by technology

Ammonia water concentration lower than 20% is discharged to 1# ammonia water tank (dilute ammonia water tank), and then transported to the ball mill device of the raw material factory through pipelines. Although the ball mill device can meet the requirements of various ammonia water concentrations, the utilization rate of ammonia water is not high. , Insufficient problems such as low output of takeaway ammonia water

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