Inversely feeding ammonium chloride producing process in serial system
A technology of ammonium chloride and reverse feed, applied in the direction of ammonium halide, etc., can solve the problems of easy production of defective products, general quality of ammonium chloride, and low output of refined ammonium, and achieve the effect of increasing production and improving the quality of agricultural ammonium products
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Embodiment 1
[0010] The cold ammonia I mother liquor obtained by absorbing ammonia and cooling the filtered mother liquor of the alkali-making system is sent to two cold crystallizers respectively, and after cold analysis and cooling down to 7 ° C to precipitate ammonium chloride crystallization, then the first cold crystallizer The solid-liquid apparent volume ratio taken out from the inside is 20%, and all the crystal slurry is sent to the first thickener for thickening until the solid-liquid apparent volume ratio is 70%. The thickened crystal slurry is then subjected to solid-liquid separation and The refined ammonium product can be obtained by drying; the washing salt and the clear liquid overflowed from the two cold crystallizers are respectively sent to two salting out crystallizers for salting out and mixing. The sodium ion concentration in the mixed solution is 75tt. Under the action, the mixed liquid further precipitates ammonium chloride crystals, and then the magma with a solid-l...
Embodiment 2
[0012] The cold ammonia I mother liquor obtained by absorbing ammonia and cooling the filtered mother liquor of the alkali-making system is sent to two cold crystallizers respectively, and after cooling down to 12°C to precipitate ammonium chloride crystallization, the first cold crystallizer All the crystal slurry with a solid-liquid apparent volume ratio of 15% taken out from the inside is sent to the first thickener for thickening until the solid-liquid apparent volume ratio is 70%, and the thickened crystal slurry is separated by solid-liquid and drying can produce refined ammonium products; the salt washing and the clear liquid overflowed from two cold crystallizers are sent to two salting crystallizers for salting out and mixing respectively. The sodium ion concentration in the mixed solution is 72tt, and the salt Under the action of analysis, the mixed liquid further precipitates ammonium chloride crystals, and then the crystal slurry with a solid-liquid apparent volume ...
Embodiment 3
[0014] The cold ammonia I mother liquor obtained by absorbing ammonia and cooling the filtered mother liquor of the alkali-making system is sent to two cold crystallizers respectively, and after cold analysis and cooling down to 9 ° C to precipitate ammonium chloride crystallization, then the first cold crystallizer The solid-liquid apparent volume ratio taken out from the inside is 30%, and all the crystal slurry is sent to the first thickener for thickening until the solid-liquid apparent volume ratio is 60%. The thickened crystal slurry is then subjected to solid-liquid separation and The refined ammonium product can be obtained by drying; the washing salt and the clear liquid overflowed from the two cold crystallizers are respectively sent to two salting out crystallizers for salting out and mixing. The sodium ion concentration in the mixed solution is 74tt. Under the action, the mixed liquid further precipitates ammonium chloride crystals, and then the magma with a solid-l...
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