Patent GB-923929-A (GB)
Title: Improvements in apparatus adapted for the recovery of vapours of solvents
Inventor: VICTOR IRVING
IPC: D06F43/08
Filed: 1959-03-31
Abstract: Apparatus for the recovery of vapours of a volatile organic solvent used in a container for cleaning materials comprises said container, a pipe containing a damper and extending from said container to an enclosed vessel containing an adsorbent, a fan associated with said pipe for passing air and said vapours to said enclosed vessel, and a branch pipe extending from said pipe to a region adjacent the base of said container.  The apparatus is used in the process claimed in Specification 923,928.  As shown in Fig. 1 an adsorption apparatus 10 comprises the adsorbers.  The body portions 12 have upper dished surfaces 14 joined to neck portions 16 closed by flanges 18, and lower dished surfaces so terminating in neck portions 22 closed at the lower end by flanged plates 24, said neck portions 16 and 22 being fitted with valves similar to that shown at 26.  Back valve plate 30 is fitted with <PICT:0923929/III/1> a resilient disc 36 engaging the open end of a conduit 38 joined to a central tee 40 connected to the outlet side of a blower casing 42 wherein fan 44 is driven by motor 46.  The vapours to be passed through the adsorber pass through inlet opening 56, lint bag 50 and mesh screen 54.  Each of the neck portions 22 is fitted with a discharge opening controlled by a valve similar to valve 26, said discharge opening may connect with a conduit 58 which may extend out of the building.  Within container 12 a foraminous plate 60 supports the adsorbent, e.g. carbon.  In operation, solvent vapours pass downwardly through the apparatus and are adsorbed by the carbon.  To liberate the solvent, steam is admitted to the lower portion of containers 12 from steam generator 64, the vapour mixture passes out through top plate 18 into conduit 70 to condenser 74 and liquid separator 76.ALSO:<PICT:0923929/IV(a)/1> Apparatus for the recovery of vapours of a volatile organic solvent used in a container for cleaning materials comprises said container, a pipe containing a damper and extending from said container to an enclosed vessel containing an adsorbent, a fan associated with said pipe for passing air and said vapours to said enclosed vessel, and a branch pipe extending from said pipe to a region adjacent the base of said container.  As shown in Fig. 5, a door 118 in casing 114 provides an opening for dry cleaning cage 116.  Casing 114 is fitted with a solvent reservoir 120 and means (not shown) for circulating solvent from said reservoir through the fabrics is provided.  In communication with the interior of casing 114 is a housing 122 fitted with a valve controlled manually by handle 124, said housing leading via duct 126 to trunk duct 128 extending to recovery apparatus 10.  Adjacent washer 114 is a recovery tumbler consisting of a casing 130 and a rotary cage 132 connected to an air circuit provided to condense solvent vapours. Adjoining trunk duct 128 are ducts 160 and 162 open on their outer ends which extend to positions adjacent the base of the apparatus, said open ends being enclosed by cages 166 of foraminous metal.  Each of said ducts is fitted with a damper 168. Fig. 6 (not shown) illustrates an apparatus having a combined washer-tumbler.  The apparatus is used in the process claimed in Specification 923,928.