INSTALLATION FOR DRYING AND HEAT TREATMENT OF CATALYSTS Russian patent published in 2009 - IPC F26B3/12 

FIELD: heating; drying.

SUBSTANCE: present invention pertains to the method of drying solutions, obtaining a granular product with high hygroscopicity, and can be used in different fields of chemical engineering and related industries, where there are high demands for value of final water content in the product. The installation for drying and heat treatment of catalysts has a plunger pump for supplying the initial solution, a filter for separating impurities, a spray-type drier, designed for drying and granulating a catalyst from the solution, battery cyclones for trapping the end product and directing it to an auger-type or belt-type conveyer for the dried product. The installation also has a ventilator, smoke exhaust and a heat generator. Through the smoke exhaust, the recycle stream is directed into a Venturi scrubber for collection in a container in the bunker part of the scrubber in form of a deposit and from the drop catcher. The solution is moved into the scrubber by the pump. The drying agent is moved into the heat treatment device by the ventilator through the heat generator. The separator moves the dried product to the cyclone of a pressure feed. The heat treatment device is designed for creating a two-stage temperature mode for heat treatment and regulates the time spent by the catalyst in each stage: in the first stage the drying agent is put into the top part of the device, and the vapour-gas medium, in contact with catalyst particles, is put into the bottom part of the device. The end product goes into a cooler. The scrubber with drop catcher is designed for the final process of dust collection of the recycle stream and cleaning the drying agent discharged into the atmosphere. The installation has a system of cleaning exhaust drying agent, a unit for cooling the end product, a batched feed unit, means of transporting the product inside the installation, a bin for collecting the end product and other units, creating the necessary infrastructure of the complex installation. The system for feeding in the moist initial solution is in form of acoustic burners, with a case in which there is an acoustic generator, comprising a resonator, and inlet pipes of atomising agent and solution. The case is in form of a cup with a bottom, inside of which there is a case for the acoustic generator, which is in form of a hollow rod with a V-shaped aperture and a nozzle. The solution enters the annular clearance between the outer surface of the resonator and the inner surface of the nozzle. The inlet channel of the solution is at a tangent to the inner surface of the cup and is in form of a rectangular aperture. Air is let in through a connecting pipe in the case, a valve, located over the saddle of the resonator, and the opening of the resonator, and then goes through at least, one V-shaped aperture, which is at an angle of 30°-60° to the axis of the resonator. In the annular clearance between the inner surface of the cup and the outer surface of the resonator, there is a helical guide, capable of creating a swirling stream of solution, getting into the channel.

EFFECT: increased efficiency of drying and heat treatment processes.

2 cl, 2 dwg