Heat exchanger cleaning system and heat exchanger cleaning method

Abstract

A heat exchanger cleaning system comprises: a target rotating body which rotates around a rotation axis; a first inlet through which first gas on the target rotating body is introduced; and a first soot blower located in the inner space of the first inlet and including a first injection port through which a first substance is injected and a second injection port through which a second substance is injected, wherein a first distance of the first injection port from the rotation axis is substantially the same as a second distance of the second injection port from the rotation axis. A heat exchanger cleaning method using the heat exchanger cleaning system comprises: a step for positioning the first soot blower; a step for spraying the first substance and the second substance at the same time; and a step for removing foreign substances.

1 . A heat exchanger cleaning system, comprising:
 a target rotor that rotates around a virtual rotation axis extending in one direction;   a first inlet positioned above the target rotor, through which first gas is introduced toward target rotor;   a first outlet positioned below the target rotor and opposed to the first inlet, through which first gas passing through the target rotor is discharged;   a second inlet positioned below the target rotor and spaced apart from the first outlet, through which second gas having a temperature lower than that of the first gas is introduced toward the target rotor;   a second outlet positioned above the target rotor and opposed to the second inlet, through which the second gas passing through the target rotor is discharged; and   a first soot blower positioned in an inner space of the first inlet,   wherein the first soot blower includes: a first nozzle through which a first material is injected toward the target rotor; and a second nozzle positioned at a predetermined interval from the first nozzle, through which a second material is injected toward the target rotor, and   wherein a first distance of the first nozzle spaced apart from the virtual rotation axis of the target rotor is substantially the same as a second distance of the second nozzle spaced apart from the virtual rotation axis of the target rotor.   
     
     
         2 . The system according to  claim 1 , wherein the first material and the second material are sequentially injected to one target point of the target rotor since the target rotor rotates around the virtual rotation axis. 
     
     
         3 . The system according to  claim 2 , wherein the first material is high-temperature steam while the second material is dry ice pellets. 
     
     
         4 . The system according to  claim 1 , wherein the first soot blower is disposed adjacent to the second outlet. 
     
     
         5 . The system according to  claim 1 , wherein the first nozzle and the second nozzle are respectively located on the circumference of a concentric circle of the target rotor to face target points, which are positioned to be spaced apart from each other. 
     
     
         6 . The system according to  claim 1 , further comprising a second soot blower positioned in an inner space of the first outlet, wherein the second soot blower includes:
 a third nozzle through which the first material is injected toward the target rotor; and   a fourth nozzle positioned at a predetermined interval from the third nozzle, through which the second material is injected toward the target rotor, and   wherein a third distance of the third nozzle spaced apart from the virtual rotation axis of the target rotor is substantially equal to a fourth distance of the fourth nozzle spaced apart from the virtual rotation axis of the target rotor.   
     
     
         7 . The system according to  claim 6 , wherein the second soot blower is disposed adjacent to the second outlet. 
     
     
         8 . The system according to  claim 6 , wherein the third nozzle and the fourth nozzle are respectively located on the circumference of a concentric circle of the target rotor to face target points, which are positioned to be spaced apart from each other. 
     
     
         9 . The system according to  claim 6 , further comprising a driving unit to adjust the position of each of the first soot blower and the second soot blower,
 wherein the driving unit moves the first soot blower and the second soot blower, respectively, away from or closer to the virtual rotation axis of the target rotor, and   wherein the first soot blower is disposed such that the first distance and the second distance substantially become equal to each other by adjusting a spaced distance between the first nozzle and the second nozzle, while the second soot blower is disposed such that the third distance and the fourth distance substantially become equal to each other by adjusting a spaced distance between the third nozzle and the fourth nozzle.   
     
     
         10 . The system according to  claim 1 , wherein the first material and the second material are continuously injected simultaneously during rotation of the target rotor. 
     
     
         11 . A heat exchanger cleaning method using a heat exchanger cleaning system, which includes:
 a target rotor that rotates around a virtual rotation axis extending in one direction;   a first inlet positioned above the target rotor, through which first gas is introduced toward the target rotor;   a first outlet positioned below the target rotor and opposed to the first inlet, through which the first gas passing through the target rotor is discharged;   a second inlet positioned below the target rotor and spaced apart from the first outlet, through which second gas having a temperature lower than that of the first gas is introduced toward the target rotor; and   a second outlet positioned above the target rotor and opposed to the second inlet, through which the second gas passing through the target rotor is discharged,   the method comprising:   positioning a first soot blower in an inner space of the first inlet;   injecting a first material through the first nozzle of the first soot blower and, simultaneously, injecting a second material through the second nozzle of the first soot blower, which is positioned at a predetermined interval from the first nozzle, toward the target rotor during rotation of the target rotor; and   removing foreign substances since the first material and the second material sequentially reach one point of the target rotor,   wherein a first distance of the first nozzle spaced apart from the virtual rotation axis of the target rotor is substantially the same as a second distance of the second nozzle spaced apart from the virtual rotation axis of the target rotor.   
     
     
         12 . The method according to  claim 11 , wherein the first material is high-temperature steam, while the second material is dry ice pellets. 
     
     
         13 . The method according to  claim 11 , wherein, in the first soot blower positioning step, the first soot blower is disposed adjacent to the second outlet. 
     
     
         14 . The method according to  claim 11 , wherein, in the first soot blower positioning step, the first nozzle and the second nozzle are respectively located on the circumference of a concentric circle of the target rotor to face target pointes, which are spaced apart from each other. 
     
     
         15 . The method according to  claim 11 , further comprising:
 positioning a second soot blower in an inner space of the first outlet; and   injecting the first material through a third nozzle of the second soot blower and, simultaneously, injecting the second material through a fourth nozzle of the second soot blower, which is positioned at a predetermined interval from the third nozzle, toward the target rotor during rotation of the target rotor,   wherein a third distance of the third nozzle spaced apart from the virtual rotation axis of the target rotor is substantially the same as a fourth distance of the fourth nozzle spaced apart from the virtual rotation axis of the target rotor.   
     
     
         16 . The method according to  claim 15 , wherein, in the second soot blower positioning step, the second soot blower is disposed adjacent to the second inlet. 
     
     
         17 . The method according to  claim 11 , wherein, in the second soot blower positioning step, the third nozzle and the fourth nozzle are respectively located on the circumference of a concentric circle of the target rotor to face target points, which are spaced apart from each other. 
     
     
         18 . The method according to  claim 15 , further comprising:
 adjusting the position of each of the first soot blower and the second soot blower by a driving unit connected to the first soot blower and the second soot blower during rotation of the target rotor,   wherein, in the step of adjusting the first soot blower and the second soot blower, the first soot blower and the second soot blower, respectively, move away from or closer to the virtual rotation axis of the target rotor,   wherein a spaced distance between the first nozzle and the second nozzle of the first soot blower is adjusted such that the first distance and the second distance are substantially equal to each other, and   wherein a spaced distance between the third nozzle and the fourth nozzle of the second soot blower is adjusted such that the third distance and the fourth distance are substantially equal to each other.