Continuous synthesis method and synthesis device of calcium hydrogen phosphate dihydrate and calcium hydrogen phosphate dihydrate

The invention relates to a continuous synthesis method and a synthesis device of calcium hydrogen phosphate dihydrate and the calcium hydrogen phosphate dihydrate. According to the reaction process, only two raw materials of calcium carbonate and phosphoric acid are used, no impurity ions are introduced, the reaction is complete, and subsequent centrifugal separation and washing purification procedures are avoided. The annular cyclone reactor provided by the invention strengthens the flow, mass transfer and reaction of a slurry multiphase system, and compared with a traditional intermittent stirred tank reactor, the annular cyclone reactor provided by the invention has the advantages of more stable slurry flow, more uniform mixing, more excellent heat and mass transfer performance and better slurry flow horizontal pushing performance, so that the reaction is efficiently and controllably carried out, and the reaction time can be greatly shortened. The D50 particle size of the obtained product can reach 65 micr