Vacuum system for conveying a high amount of supplemental liquid

Abstract

A pump apparatus for conveying a gas-liquid mixture comprises a first pump ( 7 ) for conveying gas with a first pump chamber ( 28 ) and a first impeller ( 33 ), a second pump ( 11 ) for conveying liquid with a second pump chamber ( 36 ) and a second impeller ( 41 ), and a drive device ( 2 ) with a rotary-driveable drive shaft ( 4 ) for driving the pumps ( 7, 1 1 ), the drive shaft ( 4 ) being connected to both impellers ( 33, 41 ).

1 . The pump apparatus for conveying a gas-liquid mixture comprising
 a. a first pump for conveying gas having
 i. a first pump chamber and 
 ii. a first impeller, 
   b. a second pump for conveying liquid having
 i. a second pump chamber and 
 ii. a second impeller, and 
   c. a drive device with a rotary-driveable drive shaft for driving the pumps,   d. the drive shaft being connected to both impellers.   
   
   
       2 . The pump apparatus according to  claim 1 , wherein the first pump is configured as a liquid ring pump. 
   
   
       3 . The pump apparatus according to  claim 1 , wherein the second pump is self-priming. 
   
   
       4 . The pump apparatus according to  claim 1 , wherein the second pump is configured as a side channel pump. 
   
   
       5 . The pump apparatus according to  claim 1 , further comprising at least one liquid separator provided for separating the conveyed liquid from the conveyed gas. 
   
   
       6 . The pump apparatus according to  claim 5 , wherein the at least one liquid separator is positioned on the suction side with respect to the pumps. 
   
   
       7 . The pump apparatus according to  claims 6 , further comprising a second liquid separator positioned on the outlet side. 
   
   
       8 . The pump apparatus according to  claim 7 , wherein at least one of said separators is configured as a gravity separator.