GB805114A - Improvements in or relating to spray driers - Google Patents

Abstract

<PICT:0805114/III/1> A spray drier comprises a drying chamber into which the liquid to be dried is sprayed, and through which hot air is passed to effect the drying of the sprayed liquid wherein the drying chamber is fitted with a permeable fixed inner lining to which the sprayed or atomized particles of the liquid under treatment will not firmly adhere. The drier may be used to process milk, soap, tan extract, malt extract, molasses or ureaformaldehyde resins. The inner lining may be made of finely woven nylon, or from stainless steel or "Monel" (Registered Trade Mark) metal gauze. In a preferred embodiment, the drying chamber has an upper cylindrical wall part 10 joined to a lower conical wall 101. The liquid to be treated is sprayed into the top of the drying chamber by a spray device 11 fed from tank 12 and hot air under pressure is admitted into the top of the drying chamber through a pipe 13. The dried solid particles which are produced pass out through a discharge outlet 14 in the apex of the lower conical wall part 101 while the air is removed through a discharge pipe 15. The inner lining 16 in the form of a cylindrical curtain is fitted with hems and is attached to steel hoops or tubes 17 and 171 at the top and bottom respectively. Dried particles will not normally adhere to the curtain but if they do they may be removed by shaking.