Lemon acid hydrolysis and vacuum filtration washing device

Abstract

The utility model discloses a kind of citric acid acidolysis and vacuum filtration washing device, the feed inlet of hydrogen calcium thickening tank is connected with the filter cake discharge port of hydrogen calcium vacuum belt filter, the bottom outlet of hydrogen calcium thickening tank is connected with hydrogen calcium thickening pump and hydrogen calcium slurry buffer tank;The outlet of hydrogen calcium slurry buffer tank is connected with the feed inlet of first acidolysis pot by hydrogen calcium slurry pump, and multiple acidolysis pots are sequentially connected;The bottom outlet of concentrated sulfuric acid high tank is also connected with the acid inlet of first acidolysis pot, the discharge port of last-stage acidolysis pot is connected with the inlet of acidolysis frequency conversion circulating pump and acidolysis discharge pump, the outlet of acidolysis frequency conversion circulating pump is connected with the circulation port of first acidolysis pot, and the outlet of acidolysis discharge pump is connected with slurry distributor of acidolysis vacuum belt filter.The device converts calcium hydrogen citrate into free state citric acid, also removes calcium ion and other key impurities by generating insoluble calcium sulfate precipitate, finally provides high-purity, low-impurity citric acid solution for subsequent refining process.

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