Centrifugal compressor

Abstract

A centrifugal compressor includes: a main casing having an inlet and an outlet; at least one impeller disposed rotatably inside the main casing; an intake casing connected to the inlet, the intake casing having an intake port on a position spaced away from the inlet in a direction of an axis; a cleaning-liquid injection device capable of being disposed on a side of the intake port inside the intake casing; and a cleaning-liquid supply device for supplying a cleaning liquid to the cleaning-liquid injection device. The cleaning-liquid injection device includes: a pipe capable of being disposed so as to extend along a plane which intersects with the direction of the axis, inside the intake casing; and a plurality of injection holes disposed on the pipe.

1 . A centrifugal compressor, comprising:
 a main casing having an inlet and an outlet;   at least one impeller disposed rotatably inside the main casing;   an intake casing connected to the inlet, the intake casing having an axis in a direction orthogonal to a rotational shaft to which the at least one impeller is fixed, and an intake port on a position spaced away from the inlet in a direction of the axis;   a cleaning-liquid injection device capable of being disposed on a side of the intake port inside the intake casing; and   a cleaning-liquid supply device for supplying a cleaning liquid to the cleaning-liquid injection device,   wherein the cleaning-liquid injection device comprises:
 a pipe capable of being disposed so as to extend along a plane which intersects with the direction of the axis, inside the intake casing; and 
 a plurality of injection holes disposed on the pipe. 
   
     
     
         2 . The centrifugal compressor according to  claim 1 ,
 wherein the pipe is capable of reciprocating between an operating position inside the intake casing and a refuge position outside the intake casing.   
     
     
         3 . The centrifugal compressor according to  claim 1 ,
 wherein the pipe includes an annular portion having an annular shape in a planar view, and   wherein the plurality of injection holes is disposed on the annular portion so as to be distributed in a circumferential direction of the annular portion.   
     
     
         4 . The centrifugal compressor according to  claim 3 ,
 wherein at least a part of the plurality of injection holes is disposed on an inner peripheral surface of the annular portion.   
     
     
         5 . The centrifugal compressor according to  claim 3 ,
 wherein at least a part of the plurality of injection holes is disposed on an upstream side of the annular portion.   
     
     
         6 . The centrifugal compressor according to  claim 3 ,
 wherein the pipe includes a small-diameter annular portion having an annular shape in a planar view, the small-diameter annular portion having a smaller diameter than the annular portion and disposed concentrically with the annular portion, and   wherein at least a part of the plurality of injection holes is disposed on the small-diameter annular portion so as to be distributed in a circumferential direction of the small-diameter annular portion.   
     
     
         7 . The centrifugal compressor according to  claim 3 ,
 wherein the pipe includes at least one linear portion connecting two points on a circumference of the annular portion, and   wherein at least a part of the plurality of injection holes is disposed on the linear portion so as to be distributed in a longitudinal direction of the at least one linear portion.   
     
     
         8 . The centrifugal compressor according to  claim 3   wherein the pipe includes at least one protruding portion protruding toward a center in a radial direction from the annular portion, and   wherein at least a part of the injection holes is disposed on the protruding portion.   
     
     
         9 . The centrifugal compressor according to  claim 1 ,
 wherein the pipe includes at least one linear portion having a linear shape, and   wherein the plurality of injection holes is disposed on the at least one linear portion so as to be distributed in a longitudinal direction of the at least one linear portion.   
     
     
         10 . The centrifugal compressor according to  claim 9 ,
 wherein the plurality of injection holes is disposed on an upstream side of the at least one linear portion.   
     
     
         11 . The centrifugal compressor according to  claim 9 ,
 wherein the plurality of injection holes is disposed on both sides of the at least one linear portion in a width direction of the at least one linear portion.