The invention provides a
crystal form and morphology controllable industrial recrystallization process of waste TNT (
trinitrotoluene), which comprises the following steps: step 1, pretreatment and
dissolution: putting waste TNT raw materials into preheated
ethanol, preserving heat, and adding a composite
crystallization aid to form a TNT saturated solution; the composite
crystallization auxiliary agent is prepared from
polyvinyl butyral, diisooctyl sebacate and fluororubber. In the step 2, multi-stage precision
filtration is carried out. And step three,
crystal form and morphology controllable
crystallization: conveying the TNT refined solution obtained in the step two to an atomizer at the top of a spray crystallization
tower, atomizing, spraying into the spray crystallization
tower, and crystallizing TNT in an
orthorhombic crystal system to form spherical particles. An ultrasonic
transducer is arranged in the top area of the spray crystallization
tower, and ultrasonic
waves are applied to atomized liquid drops to induce generation of uniform
crystal nucleuses. And 4, carrying out gas-
solid separation and
solvent recovery. And step 5, post-
processing the product. According to the process disclosed by the invention, the phenomenon of'crystal bridge 'or'scabbing' in the growth process of the TNT crystal can be avoided, the blockage of a pipeline can be avoided, and
continuous production can be kept without interruption.