Apparatus for centrifugal separation of liquid particles from a gas
In order to prevent air from being sucked into the separation chamber ( 12 ) of a counter-current type of centrifugal separator through the liquid outlet ( 24 ) thereof during the normal operation the separator a liquid trap in form of a well ( 28 ) is provided in the bottom of the separator housing ( 10 ). An outlet conduit ( 32 ) opens into the lower part of the well ( 28 ), wherein the well ( 28 ), at least in its upper part, has a substantially larger cross-sectional area than that of the outlet conduit ( 32 ).
1. An apparatus for cleaning of a gas by centrifugal separation of liquid and possible solid particles contained therein, said apparatus comprising:
a housing ( 10 ) including a separation chamber ( 12 );
means for generating a sub-pressure in said separation chamber ( 12 );
a rotor ( 14 ) rotatably supported in the housing ( 10 ) and having a plurality of adjacent surface elements ( 16 ) for catching liquid particles in a gaseous flow through the rotor during the rotation thereof and throwing these out towards an inner wall of the housing ( 10 );
a gas inlet ( 20 ) for uncleaned gas in a sidewall of the housing and oriented substantially perpendicular to the rotor ( 14 ), said gas inlet being separate from a tubular outlet conduit ( 32 ) through which separated liquid flows;
an outlet for discharging the gas that has passed through and been cleaned in the rotor ( 14 ); and
an outlet ( 24 ) in a bottom part of the housing ( 10 ) for discharging the liquid collected on and flowing downwardly from the inner wall of the housing, wherein the liquid outlet ( 24 ) is formed by a well ( 28 ) in a lower part of the housing ( 10 ), in the bottom of which said tubular outlet conduit ( 32 ) for the separated liquid ends, wherein at least the portion of the well ( 28 ) adjacent to the lower part of the housing ( 10 ) has a larger cross-sectional area than that of the outlet conduit ( 32 ) and that said larger cross sectional area portion of said well is at a height such that during normal operation of the apparatus said larger cross sectional area portion of said well forms a durable liquid trap with a substantially constant liquid level thereby preventing air from flowing into the housing through the outlet conduit ( 32 ) due to a sub pressure prevailing in the housing.
2. The apparatus of claim 1 , wherein the outlet conduit ( 32 ) is provided with a vent ( 34 ).
3. The apparatus of claim 1 , wherein the cross sectional area of the entire well ( 28 ) is larger than the cross sectional area of the outlet conduit ( 32 ).
4. The apparatus of claim 1 , wherein the well ( 28 ) is formed by a pipe socket.
5. An apparatus for cleaning of a gas by centrifugal separation of liquid and possible solid particles contained therein, said apparatus comprising:
a housing ( 10 );
a gas inlet ( 20 ) in the housing for uncleaned gas;
a rotor ( 14 ) rotatably supported in the housing ( 10 ) and having a plurality of adjacent surface elements ( 16 ) for catching liquid particles in a gaseous flow through the rotor during the rotation thereof and throwing these out towards an inner wall of the housing ( 10 );
an outlet for discharging the gas that has passed through and been cleaned in the rotor ( 14 ); and
an outlet ( 24 ) in a bottom part of the housing ( 10 ) for discharging the liquid collected on and flowing downwardly from the inner wall of the housing, wherein the liquid outlet ( 24 ) is formed by a well ( 28 ) in a lower part of the housing ( 10 ), in the bottom of which a tubular outlet conduit ( 32 ) for the separated liquid ends, wherein at least the portion of the well ( 28 ) adjacent to the lower part of the housing ( 10 ) has a larger cross-sectional area than that of the outlet conduit ( 32 ) and that said larger cross sectional area portion of said well is at a height such that during normal operation of the apparatus said larger cross sectional area portion of said well forms a durable liquid trap with a substantially constant liquid level thereby preventing air from flowing into the housing through the outlet conduit ( 32 ) due to a sub pressure prevailing in the housing, wherein the cross sectional area of the outlet conduit ( 32 ) does not exceed ⅕ of the cross sectional area of the well ( 28 ).