SU445808A1 - Apparatus for drying solutions and suspensions - Google Patents

Description

i

The invention relates to a drying technique.

Apparatus for drying solutions and suspensions by spraying on an inert; a nozzle containing a vertical chamber, a gas distribution grid, a nozzle placed above it, tangential nozzles for introducing a secondary heat carrier into the drying zone and a baffle grid.

The disadvantage of such devices is the relatively low intensity of the processes of heat and mass transfer during drying, as well as the formation of stagnant zones.

The purpose of the invention is to intensify the process by increasing the residence time of the product in the drying zone and preventing the formation of stagnant zones. For this purpose, the chamber is provided with oppositely directed additional tangential r. X nozzles for introducing secondary heat carrier l and located in its upper part with a peripheral annular pocket for collecting an inert nozzle, connected by drains to the drying zone. In addition, the device is equipped with a living j placed on its axis.

pear shaped insert

The drawing schematically shows the proposed apparatus

The apparatus contains a W lindric Chamber 1, a gas distributor 1 b 2 a fan 3, a heater 4, a nozzle 5, tangential nozzles 6 and 7, a fan 8, a heater 9, an excellent grid 10 and a cyclone 11,

The solution of Him suspension 1 1 intended for drying is supplied with a 4-lance 5 to an inert nozzle and pre-dried in a fluidized bed. The nozzle picked up by tangent1 {thermally supplied through nozzles 7 enters the zone of action of oppositely directed tangential means 6. This increases the residence time of the product in the drying chamber and intensifies the drying process.

A passage in a series of zones with groups of oppositely directed nozzles, the material dries out, separates from the inert nozzle, and is caught in the cyclone 11. To prevent the transport of the inner nozzle into the cyclone, an othe net 1O serves. The nozzle assembled in the peripheral annular pockets 12 is returned along the rows 13 to the fluidized bed.

Subject invention

Claims (1)

1. An apparatus for drying solutions and suspensions by spraying onto an inert nozzle containing a vertical chamber with gas distribution grid j located above the last nozzle, tangential nozzles for introducing secondary heat transfer medium into the drying zone and baffle grid, characterized in increase the residence time of the product in the drying zone, the chamber is equipped with oppositely directed additional tangential nozzles for introducing the secondary heat source located at its upper STI peripheral annular pocket for collecting inert packing. united, stogzhamk: with a zone of an entity, 2, the Apparatus according to claim 1, of tl and h and y and with the tem (. What., In order to prevent the formation of stagnant zones, it is equipped with a pear-shaped insert, spaced along its axis, narrowly upward.