CATALYST DRYING AND TEMPERING PLANT Russian patent published in 2008 - IPC F26B3/12 

FIELD: mechanic engineering.

SUBSTANCE: invention is referred to solutions drying methods with granulated material as an end product having high hydroscopic properties and can be used in different areas of chemical technologies or related branches of engineering where high requirements are made to final water content in the product. Catalyst drying and tempering plant includes plunger pump for original solution supply, admixture filters, spray dryer to dry and granulate catalyst from solution, battery cyclones to trap finished product and supply it to screw or belt conveyor. As sludge, recycle flow is directed to Venturi scrubber by smoke exhauster to collect it in a tank from scrubber hopper part and drip pocket. Solution is pumped into scrubber and drying agent is supplied to tempering apparatus by fan from heat generator. Separator supplies finished product into pneumatic transport cyclone and tempering apparatus is designed to create two-stage temperature mode of tempering: first stage is a supply of drying agent into the upper part of dryer whereas vapour-gas medium contacting with catalyst particles is supplied to the lower part of apparatus. Finished product is supplied to cooler and scrubber with drip pocket is to trap dust from recycle and clean drying agent. Plant is also equipped with spent drying agent cleaning system, finished product cooling unit, feed metering device, product transport unit inside plant, finished product hopper and other units building up the required infrastructure of complete plant. Wet original solution supply system consists of acoustic injectors and include resonator in the shape of at least one spherical void located in the end wall of the body. End wall is directed to distributing head and spherical void is connected to clearance by means of calibrated hole. Clearance is located between vertical hole in end wall of the body and distributing head rod. At the point of clearance section perpendicular to rod axis its cross-section is annular and distributing head is in the shape of the body with lid represented by flattened cone combined by large foundations. There is a collector in the shape of cylindrical void with annular channel resulting from a combination of external cylindrical surface of hollow rod and coaxial holes with similar diameters made in lid and body of distributing head respectively. Distributing head body is provided with at least, three circular channels for solution discharge being perpendicular to rod axis. Edge of hole is located on conical surface of distributing head lid and pitch angle of lid determines rooted angle of sprayed solution jet.

EFFECT: improvement of drying and tempering efficiency.

2 cl, 2 dwg