In the ammonium chloride production process using a counter-current flow, is it necessary to install a slurry thickener for salt precipitation?
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In the ammonium chloride production process using a counter-current flow, what is the necessity of installing a slurry thickener for salt precipitation? The setting of the salting-out slurry thickener is to further thicken the salting-out slurry and reduce the amount of mother liquor that enters the cold crystallization vessel along with the slurry ； What are the advantages and disadvantages if no salting-out slurry thickener is used and all of the salting-out slurry is sent directly to cold crystallization? Looking forward to the help from fellow sea lovers!
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It is necessary to install a salting-out thickener. Since the thickening device serves as an intermediate storage area, the thickened salting-out slurry is pumped evenly through a counter-flow pump to the cold crystallization vessel, thereby preventing inconsistencies in the composition of the mother liquor from affecting the quality of the ammonium chloride product.
The thickener serves as an intermediate storage mechanism. Additionally, the solid-liquid ratio of the salt-precipitation slurry is generally around 40%, which means that 60% remains as mother liquor; if thickening is not carried out, the circulation volume of the counterflow pump and the axial flow pump in the crystallizer must be increased.