Method for continuous production of crystallization levulose, equipment used and special crystallizer thereof

The invention discloses a method for continuously producing crystal fruit sugar as well as equipment and a special crystallizer thereof. Fruits and grape liquor with 85 to 92 percent of concentration and 92 to 98 percent of fruit sugar content grow grains in the crystallizer, five sections of heat insulating water jackets are arranged outside the crystallizer, the liquor temperature of each section from up to down is respectively 5a:55 to 45 DEG C, 5b:50 to 40 DEG C, 5c:45 to 35 DEG C, 5d:40 to 30 DEG C, and 5e:35 to 25 DEG C; crystallizer bodies enclosed by the first to the third sections ofheat insulating water jackets are straight barrel shapes, the crystallizer body enclosed by the fourth section of heat insulating water jacket is a tapered desk shape of which the upper part is largeand the lower part is small, the upper port of the tapered desk shape has the same diameter with the upper section of crystallizer, the crystallizer body corresponding to the fifth section of heat insulating water jacket is a