Tail water recovery device for producing magnesium by concentrated nitric acid

Abstract

The invention relates to the technical field of material recycling, in particular to a tail water recycling device for producing magnesium by concentrated nitric acid. The concentrated nitric acid production magnesium tail water recovery device comprises an acid water distillation tower, the bottom of the acid water distillation tower is communicated with a magnesium nitrate evaporator, and the acid water distillation tower is communicated with a magnesium tail circulation mechanism and a tower tail circulation mechanism; the magnesium tail water circulating mechanism comprises a magnesium tail water circulating tank communicated with the acid water distillation tower through a magnesium tail water circulating pump; the tower tail circulation mechanism comprises a tower tail water circulation tank communicated with the tower tail of the acid water distillation tower, the tower tail water circulation tank is communicated with an inlet of a tower tail ejector through a tower tail pump, an outlet of the tower tail ejector is connected into the tower tail water circulation tank, and the tower tail water circulation tank is communicated with an acid water tank. The invention discloses a concentrated nitric acid production magnesium tail water recovery device.

Description

technical field [0001] The invention relates to the technical field of material recovery and utilization, in particular to a recovery device for magnesium tail water produced from concentrated nitric acid. Background technique [0002] The magnesium tail water produced in the production process of concentrated nitric acid contains 3-5% of nitric acid. During the production, this water is added to the top of the dilute nitric acid absorption tower, and the excess is discharged outside. There are the following problems: 1. As the top of the acid tower, adding water containing 3-5% nitric acid leads to a high concentration of the exhaust tail gas, which increases the subsequent treatment load; 2. The direct discharge requires lye neutralization and conditioning, and discharges a large amount of sodium nitrate solution , resulting in high consumption and processing costs and environmental pollution. Contents of the invention [0003] The technical problem to be solved by the ...

AI Technical Summary

Problems solved by technology

There are the following problems: 1. As the top of the acid tower, adding water containing 3-5% nitric acid leads to a high concentration of the exhaust tail gas, which increases the subsequent treatment load; 2. The direct discharge requires lye neutralization and conditioning, and discharges a large amount of sodium nitrate solution , resulting in high consumption and processing costs and environmental pollution

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