Phosphoric acid and gas ammonia neutralization reaction device

Abstract

The invention discloses a phosphoric acid and gas ammonia neutralization reaction device comprising a phosphoric acid tube (1), gas ammonia tubes (2) and a reaction tank (3), wherein the phosphoric acid tube (1) and a plurality of gas ammonia tubes (2) are led into the lower end of the reactive tank (3) from the top of the reaction tank (3); the side surface of the upper end of the reactive tank (3) is provided with a discharge hole (4); and the side surface of the bottom end of the reaction tank (3) is provided with a discharge gate (5). In the invention, the phosphoric acid tube (1) and the gas ammonia tubes (2) are led into the lower end of the reaction tank (3) from the top of the reaction tank (3), the gas ammonia enters the reactor from multiple points, and therefore, the gas ammonia can more evenly react with the phosphoric acid. The discharge hole is arranged on the side surface of the upper end of the reaction tank, which is beneficial to the phosphoric acid and the gas ammonia to form the vertical convection in the reactive tank, and thereby, the neutralization reaction is more sufficient. The side surface of the lower end of the reaction tank is provided with the discharge gate (5), and therefore, liquid in the discharge gate can be rapidly discharged completely before scales in the reactive tank are cleaned, and cleaning is convenient.

Description

technical field [0001] The invention relates to ammonium phosphate production equipment, in particular to a neutralization reaction device for phosphoric acid and ammonia gas. Background technique [0002] The process of preparing ammonium phosphate by the concentration method of neutralizing slurry is to neutralize dilute phosphoric acid with ammonia first, and then evaporate and concentrate the neutralized slurry to prepare ammonium phosphate. In this ammonium phosphate production process, a fully enclosed tubular neutralization reactor (such as figure 1 shown) to neutralize phosphoric acid and gaseous ammonia, but due to its structure, phosphoric acid and neutralized slurry can easily cause pipeline blockage after scaling inside, and this fully enclosed structure also brings great trouble to cleaning. It is inconvenient, so it leads to longer parking time and lower production efficiency during the production process. In addition, the above-mentioned fully enclosed tubul...

AI Technical Summary

Problems solved by technology

In this ammonium phosphate production process, a fully enclosed tubular neutralization reactor (such as figure 1 shown) to neutralize phosphoric acid and gaseous ammonia, but due to its structure, phosphoric acid and neutralized slurry can easily cause pipeline blockage after scaling inside, and this fully enclosed structure also brings great trouble to cleaning. Inconvenient, so it leads to longer parking time and lower production efficiency during the production process

In addition, the above-mentioned fully enclosed tubular neutralization reactor also has the following disadvantages during use: in order to make the neutralization reaction between phosphoric acid and ammonia gas uniform and sufficient, it is usually necessary to install a stirrer in the reactor, so the power consumption is large, and it is not necessary to Conducive to production and energy saving; the fully enclosed structure prevents the operator from detecting the liquid level in the reactor, so it is difficult to optimize the control of the amount of phosphoric acid and ammonia gas; A lot of heat, so there is a lot of water vapor in the reactor, and the tubular reactor has no vent hole, so there is more water in the neutralization slurry, which is very unfavorable for the subsequent slurry concentration process

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