Filter unit

Claim 1

A FILTER UNIT FOR SEPARATING SOLID CATBON DIOXIDE FROM A MIXTURE OF GASEOUS AND LIQUID AIR CONTAINING SOLID CARBON DIOXIDE IN SUSPENSION COMPRISING AN ELONGATE CYLINDRICAL AXIALLY VERTICALLY DISPOSED VESEL, A CYLINDRICAL POROUS FILTER CANDLE COAXIALLY DISPOSED WITHIN SAID VESSEL AND INCLUDING A CLOSED BOTTOM PORTION SPACED FROM THE BOTTOM OF SAID VESSEL, SAID CANDLE ADAPTED TO PERMIT THE PASSAGE OF GAS AND LIQUID BUT TO PREVENT THE PASSAGE OF SOLIDS SUSPENDED WITHIN SAID VESSEL, AN IMPROVIOUS CYLINDRICAL SLEEVE MEMBER COAXIALLY DISPOSED WITHIN SAID VESSEL AND AROUND SAID CANDLE, SAID SLEEVE EXTENDING WITHIN SAID VESSEL TO A POINT ABOVE THE BOTTOM THEREOF BUT BELOW THE CLOSED END OF THE FILTER CANDLE, SAID SLEEVE INCLUDING PASSAGE MEANS IN THE UPPER END THEREOF, SAID PASSAGE COMMUNICATING THE EXTERIOR OF SAID SLEEVE WITH SAID FILTER CANDLE, A FLUID INLET OPENING TANGENTIALLY INTO SAID VESSEL EXTERIORLY OF SAID SLEEVE, AND FLUID OUTLET MEANS WITHIN SAID FILTER CANDLE IN THE FORM OF AN IMPERSIOUS DIP PIPE PARALLEL TO AND SPACED FROM THE INNER WALL OF SAID CANDLE AND TERMINATING WITH AN OPEN END ADJAENT THE BOTTOM OF SAID CANDLE, SAID SLEEVE BEING OPEN AT ITS LOWER END BELOW THE BOTTOM OF THE FILTER CANDLE TO PERMIT ACESS OF LIQUID TO SAID FILTER CANDLE, SAID GASEOUS PORTION OF SAID MIXTURE COMMUNICATION WITH SAID FILTER CANDLE THROUGH SAID PASAGE MEANS IN SAID MIXTURE COMMUNICATES WITH SAID OPEN END OF SAID OF SAID MIXTURE COMMUNICATES WITH SAID OPEN END OF SAID DIP PIPE WITHIN SAID FILTER.