KR102274931B1 - Selective catalyst reduction system - Google Patents

Abstract

An embodiment of the present invention relates to a selective catalytic reduction system, and a selective catalytic reduction system for selectively reducing nitrogen oxides contained in exhaust gas discharged from an engine installed on a ship is a main pipe through which the exhaust gas passes, and A reactor in which a catalyst is installed and installed on the main pipe, a tank in which the fluid is stored, a distribution pipe for distributing the stored fluid from the tank, and a first part are inserted and installed inside the reactor and supplying the fluid distributed from the distribution pipe A soot blower including a pipe and a second pipe, a part of which is spaced apart from the first pipe in the reactor, and supplies the fluid distributed from the distribution pipe, and a control unit for controlling the soot blower according to the operation area of the vessel includes

Description

Selective catalytic reduction system {SELECTIVE CATALYST REDUCTION SYSTEM}

An embodiment of the present invention relates to a selective catalytic reduction system, and more particularly, to a selective catalytic reduction system capable of selectively reducing nitrogen oxides contained in exhaust gas.

In general, the selective catalytic reduction system selectively reduces nitrogen oxides contained in exhaust gas. Specifically, the engine generates power by burning the supplied fuel, and thus exhaust gas containing nitrogen oxides and sulfur components is discharged to the outside. The selective catalytic reduction system allows exhaust gas to pass through the catalyst and selectively reduces nitrogen oxides.

However, when the exhaust gas continuously passes through the catalyst, soot included in the exhaust gas is deposited in a plurality of flow passages formed inside the catalyst to block the flow passages. In this case, the exhaust gas pressure inside the reactor increases or the efficient use of the catalyst is inhibited. In addition, when the soot is deposited on the flow path formed in the catalyst, there is a problem in that the replacement cycle becomes faster due to the deterioration of the life of the catalyst.

In addition, when the inflow of the exhaust gas into the reactor through which the exhaust gas has passed is blocked, the temperature inside the reactor is reduced and water is condensed, which meets the sulfur component contained in the exhaust gas remaining inside the reactor to form sulfuric acid, thereby forming a reactor or catalyst. There is a problem of corrosion. In this case, there is a problem in that the replacement cycle becomes faster due to the deterioration of the life of the catalyst and the reactor.

Embodiments of the present invention provide a selective catalytic reduction system that can reduce the deterioration of the lifespan due to contamination of the catalyst from soot or sulfur components depending on the location and operation of the vessel.

According to an embodiment of the present invention, a selective catalytic reduction system for selectively reducing nitrogen oxides contained in exhaust gas discharged from an engine installed on a ship is a main pipe through which the exhaust gas passes, a catalyst is installed therein, and the main A reactor installed on a pipe, a tank in which a fluid is stored, a distribution pipe for distributing the stored fluid from the tank, and a first pipe partially inserted into the reactor and supplied with the fluid distributed from the distribution pipe, and a part of the reactor It includes a soot blower disposed therein spaced apart from the first pipe and including a second pipe for supplying the fluid distributed from the distribution pipe, and a controller for controlling the soot blower according to the operation area of the vessel.

In addition, the above-described selective catalytic reduction system further comprises a bypass pipe for guiding the exhaust gas to be discharged by bypassing the reactor, and a heating member for increasing the temperature of the fluid supplied to the reactor, wherein the control unit is the vessel exhaust gas When the vessel is in the emission control area and the vessel is in operation, the exhaust gas is passed through the main pipe and the soot blower is controlled to operate in a purification mode of a preset cycle, and the vessel is in the emission control area and the vessel is in the emission control area When the operation is stopped, it is possible to control the exhaust gas to pass through the bypass pipe, operate the heating member, and operate in a heating mode for controlling the fluid pressure of the soot blower.

In addition, when the vessel is in a non-regulated area of exhaust gas emission and the vessel is operating, the control unit allows the exhaust gas to pass through the bypass pipe and can be controlled to operate in a sealing mode to control the fluid pressure of the soot blower. have.

In addition, the selective catalytic reduction system described above further comprises a front valve installed on the main pipe in front of the reactor, a rear valve installed on the main pipe behind the reactor, and a bypass valve installed on the bypass pipe, the control unit When the exhaust gas passes through the bypass pipe, the bypass valve is opened and the front valve and the rear valve are closed, and when the exhaust gas passes through the main pipe, the bypass valve is closed and the front valve and the rear valve are closed. can be opened

In addition, when controlling the fluid pressure of the soot blower, the controller may control the fluid pressure of the soot blower so that the internal pressure of the reactor is greater than the pressure of the exhaust gas passing through the bypass pipe.

Also, the controller may open the rear valve when the internal pressure of the reactor exceeds a preset target pressure.

Alternatively, the selective catalytic reduction system described above further comprises a vent pipe branched from the main pipe between the reactor and the rear valve, and a vent valve installed on the vent pipe, wherein the control unit has a preset internal pressure of the reactor. When the target pressure is exceeded, the vent valve may be opened.

In addition, the heating member may be installed inside any one or more of the first pipe and the second pipe.

In addition, the soot blower is installed inside a pipe in which the heating member is installed among the first pipe or the second pipe, and further includes a guide member for supporting the heating member and guiding the flow of the fluid passing through the pipe can

Alternatively, the heating member may be installed by being wound around an outer circumferential surface of one or more of the first pipe and the second pipe in a longitudinal direction of the first pipe or the second pipe.

Alternatively, the heating member may be disposed between the inner peripheral surface of the reactor and the outer peripheral surface of the catalyst.

In addition, the distribution pipe of the soot blower and the first pipe and the second pipe may be detachably coupled.

Alternatively, the selective catalytic reduction system for selectively reducing nitrogen oxides contained in exhaust gas discharged from an engine installed on a ship according to another embodiment of the present invention is a main pipe through which the exhaust gas passes, and a catalyst is installed therein and A reactor installed on the main pipe, a sub pipe branching from the rear of the reactor and joining to the front of the reactor, a bypass pipe for guiding the exhaust gas to bypass the reactor and discharged, and a blower installed on the sub pipe; , a heating member disposed to be spaced apart from the blower on the sub-pipe, and when the ship is in an exhaust gas emission control area and the operation of the ship is stopped, the exhaust gas passes through the bypass pipe, and the blower and the heating member It includes a control unit that operates the.

According to embodiments of the present invention, the selective catalytic reduction system can effectively reduce the deterioration of the lifespan due to contamination of the catalyst from soot or sulfur components depending on the location and operation of the vessel.

1 to 3 show the operating state of the selective catalytic reduction system according to the first embodiment of the present invention.
4 to 5 show the soot blower of FIGS. 1 to 3 .
6 to 8 show the operating state of the selective catalytic reduction system according to the second embodiment of the present invention.
9 shows a soot blower of a selective catalytic reduction system according to a third embodiment of the present invention.
10 shows a soot blower of a selective catalytic reduction system according to a fourth embodiment of the present invention.
11 shows a part of a selective catalytic reduction system according to a fifth embodiment of the present invention.
12 to 14 are flowcharts showing the operation process of the selective catalytic reduction system according to the first and second embodiments of the present invention.
15 is a flowchart showing the operation process of the selective catalytic reduction system according to the fifth embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

It is noted that the drawings are schematic and not drawn to scale. Relative dimensions and proportions of parts in the drawings are shown exaggerated or reduced in size for clarity and convenience in the drawings, and any dimensions are illustrative only and not limiting. And the same reference numerals are used to indicate like features to the same structural element or part appearing in two or more drawings.

The embodiment of the present invention specifically represents an ideal embodiment of the present invention. As a result, various modifications of the diagram are expected. Therefore, the embodiment is not limited to a specific shape of the illustrated area, and includes, for example, a shape modification by manufacturing.

Hereinafter, with reference to FIGS. 1 to 5, a selective catalytic reduction system 101 according to a first embodiment of the present invention will be described.

The selective catalytic reduction system 101 selectively reduces nitrogen oxides contained in the exhaust gas discharged from the engine 10 installed on the ship. Specifically, the engine 10 generates power by burning fuel to provide power to operate a ship, and thus discharges exhaust gas. And, these exhaust gases contain nitrogen oxides. Therefore, the selective catalytic reduction system 101 reduces nitrogen oxides contained in the exhaust gas to be discharged to the outside.

The selective catalytic reduction system 101, as shown in FIG. 1, includes a main pipe 100, a reactor 200, a soot blower 301, and a control unit 700.

The main pipe 100 guides the exhaust gas to pass therethrough. Specifically, the main pipe 100 may guide the exhaust gas discharged from the engine 10 to pass therethrough.

A catalyst 210 is installed inside the reactor 200 . In addition, the reactor 200 is installed on the main pipe (100). For example, the catalyst 210 installed inside the reactor 200 may be a selective reduction catalyst capable of selectively reducing nitrogen oxides contained in exhaust gas.

The soot blower 301 supplies a fluid into the reactor 200 . In addition, as shown in FIG. 4 , the soot blower 301 includes a tank 310 , a distribution pipe 320 , a first pipe 330 , and a second pipe 340 .

The tank 310 stores a fluid. Specifically, the fluid to be injected into the reactor 200 is stored in the tank 310 . For example, the fluid stored in the tank 310 may be compressed air.

One end of the distribution pipe 320 is connected to the tank 310 . In addition, the distribution pipe 320 distributes the stored fluid from the tank 310 . Specifically, the other end of the distribution pipe 320 may be formed to have a plurality of flow paths.

The first pipe 330 may be inserted and installed inside the reactor 200 . Also, the first pipe 330 may be connected to any one of a plurality of flow paths formed at the other end of the distribution pipe 320 . Specifically, a plurality of injection holes 331 may be formed in the first pipe 330 in the longitudinal direction of the first pipe 330 . For example, at least a portion of the first pipe 330 may be inserted into the reactor 200 , and the remainder may be connected to the distribution pipe 320 disposed outside the reactor 200 .

In addition, the first pipe 330 may be disposed in front of any one of the catalysts of the plurality of catalysts 210 installed inside the reactor 200 .

The second pipe 340 may be inserted and installed inside the reactor 200 . In addition, the second pipe 340 is spaced apart from the first pipe 330 . In addition, the second pipe 340 may be connected to any one of a plurality of flow paths formed at the other end of the distribution pipe 320 . When two flow paths are formed at the other end of the distribution pipe 320 , one may be connected to the first pipe 330 and the other may be connected to the second pipe 340 . Specifically, a plurality of injection holes 341 may be formed in the second pipe 340 in the longitudinal direction of the second pipe 340 . For example, at least a portion of the second pipe 340 may be inserted into the reactor 200 , and the remainder may be connected to the distribution pipe 320 disposed outside the reactor 200 .

In addition, the second pipe 340 may be disposed in front of the other one of the catalysts of the plurality of catalysts 210 installed inside the reactor 200 .

That is, the fluid stored in the tank 310 passes through the distribution pipe 320 and is distributed to the first pipe 330 and the second pipe 340 , and a plurality of injection holes 331 formed in the first pipe 330 . And it may be sprayed through the plurality of injection holes 341 formed in the second pipe (340).

The control unit 700 may control the soot blower 301 according to the operation area of the vessel. In addition, the control unit 700 may selectively operate the operation of the soot blower 301 among a plurality of modes according to the operation area of the vessel. Specifically, there are an exhaust gas emission regulation area (ECA) and an exhaust gas emission non-regulation area (non??ECA) in which a ship must reduce and discharge nitrogen oxides contained in exhaust gas depending on the operation area. Information on the exhaust gas emission regulated area and the exhaust gas emission non-regulated area is preset in the control unit 700 . That is, the controller 700 may determine whether the area in which the ship is currently located is an exhaust gas emission regulated area or an exhaust gas emission non-regulated area based on the navigation information of the ship. In other words, the control unit 700 may remove foreign substances attached to the catalyst 210 with the soot blower 301 or increase the pressure inside the reactor 200 with the soot blower 301 depending on the operation area of the vessel. .

Therefore, the selective catalytic reduction system 101 according to the first embodiment of the present invention can remove foreign substances attached to the catalyst 210 with the soot blower 301 according to the operation area of the vessel, and the soot blower 301 . It is possible to increase the pressure inside the reactor 200 .

In addition, the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a bypass pipe (400).

The bypass pipe 400 may guide the exhaust gas to bypass the reactor 200 and be discharged. Specifically, one end of the bypass pipe 400 is branched from the main pipe 100 in front of the reactor 200 , and the other end of the bypass pipe 400 can be joined into the main pipe 100 at the rear of the reactor 200 . have.

In addition, the soot blower 101 may further include a heating member 350 . The heating member 350 may increase the temperature of the fluid supplied to the reactor 200 . Specifically, the heating member 350 may be controlled by the controller 700 . That is, the heating member 350 may allow the fluid supplied to the reactor 200 by the soot blower 301 to be supplied at an elevated temperature.

The control unit 700 may select and control the soot blower 301 in either a purification mode or a heating mode according to whether the vessel is operating when the vessel is in the emission control area. Specifically, the control unit 700 may determine whether the current vessel is operating according to the operating state of the engine 10 .

The purification mode is controlled so that the soot blower 301 is operated at a preset cycle.

The heating mode may control the fluid pressure of the soot blower 301 and allow the fluid to be heated and supplied to the reactor 200 .

The control unit 700 may operate the soot blower 301 in the purification mode and allow the exhaust gas to pass through the main pipe 100 when the vessel is in the emission control area and the vessel is operating. Specifically, the control unit 700 may inject a fluid such that the soot blower 301 is operated at a predetermined cycle so that foreign substances attached to the catalyst 210 installed inside the reactor 200 are discharged to the outside of the reactor 200 .

In addition, the control unit 700 may operate the soot blower 301 in the heating mode and allow the exhaust gas to pass through the bypass pipe 400 when the vessel is in the exhaust gas emission control area and the operation of the vessel is stopped. When the soot blower 301 is operated in the heating mode, the control unit 700 may operate the heating member 350 so that the fluid supplied to the reactor 200 is heated and supplied. Specifically, the controller 700 may adjust the pressure of the reactor 200 by controlling the pressure of the fluid supplied to the reactor 200 by increasing the temperature from the soot blower 301 .

Alternatively, the control unit 700 of the selective catalytic reduction system 101 according to the first embodiment of the present invention is such that the soot blower 301 operates in the sealing mode when the vessel is in an exhaust gas emission non-regulated area and the vessel is operating. can do. In this case, the controller 700 may control the exhaust gas to pass through the bypass pipe 400 .

The control unit 700 may cause the soot blower 301 to operate in a sealing mode for controlling the pressure of the fluid supplied from the soot blower 301 to the reactor 200 .

In addition, the control unit 700 may control the operation of the soot blower 301 to stop when the vessel is in a non-regulated area for exhaust gas emission and the vessel is in operation suspension.

In addition, the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a front valve 910 and a rear valve 920 and a bypass valve (930).

The front valve 910 may be installed on the main pipe 100 in front of the reactor 200 . In addition, the front valve 910 is controlled by the controller 700 and may control the flow of exhaust gas flowing into the reactor 200 through the main pipe 100 .

The rear valve 920 may be installed on the main pipe 100 behind the reactor 200 . In addition, the rear valve 920 is controlled by the control unit 700 and can control that the exhaust gas that has passed through the reactor 200 is discharged to the outside through the main pipe 100 . Specifically, the rear valve 920 may be disposed closer to the reactor 200 than the junction of the bypass pipe 400 .

The bypass valve 930 may be installed on the bypass pipe 400 . In addition, the bypass valve 930 is controlled by the controller 700 and may control the flow of exhaust gas flowing into the bypass pipe 400 .

When the exhaust gas passes through the bypass pipe 400 , the control unit 700 opens the bypass valve 930 and closes the front valve 910 and the rear valve 920 . Specifically, when the exhaust gas is discharged by bypassing the reactor 200 through the bypass pipe 400 , the control unit 700 closes the front valve 910 and the rear valve 920 so that the exhaust gas flows into the reactor 200 . By blocking the inflow and opening the bypass valve 930 , the exhaust gas may be discharged only through the bypass pipe 400 .

In addition, when the exhaust gas passes through the main pipe 100 , the control unit 700 closes the bypass valve 930 and opens the front valve 910 and the rear valve 920 . Specifically, when the exhaust gas is discharged through the reactor 200 through the main pipe 100 , the control unit 700 opens the front valve 910 and the rear valve 920 to open the front valve 910 and the rear valve 920 . After the exhaust gas passes through the reactor 200 , it is discharged to the rear of the reactor 200 , and the bypass valve 930 is closed to allow the exhaust gas to pass through the reactor 200 .

In addition, the control unit 700 of the selective catalytic reduction system 101 according to the first embodiment of the present invention, when controlling the fluid pressure of the soot blower 301, than the pressure of the exhaust gas passing through the bypass pipe 400 The fluid pressure of the soot blower 301 may be controlled so that the internal pressure of the reactor 200 is large. That is, when the control unit 700 operates the soot blower 301 in the heating mode or the sealing mode, the front valve 910 and the rear valve 920 are closed than the pressure of the exhaust gas passing through the bypass pipe 400 . The fluid pressure of the soot blower 301 may be controlled so that the pressure of the fluid supplied to the reactor 200 is large.

Specifically, when the soot blower 301 operates in a heating mode or a sealing mode, the control unit 700 operates between the closed front valve 910 and the closed rear valve 920 according to the pressure of the fluid supplied from the soot blower 301 . It is possible to control the pressure of the formed closed loop state to exceed the pressure of the exhaust gas passing through the bypass pipe 400 . Even when the exhaust gas passing through the bypass pipe 400 fails to completely seal the main pipe 100 due to an abnormality in the front valve 910 or the rear valve 920 , the pressure in the closed loop state prevents the bypass pipe 400 from being closed. Since it is higher than the pressure of the exhaust gas passing through, it can be prevented from flowing into the exhaust gas reactor 200 passing through the bypass pipe 400 .

For example, the control unit 700 may control the fluid pressure of the soot blower 301 so that the pressure of the closed loop state is 0.1 bar to 0.2 bar higher than the pressure of the exhaust gas passing through the bypass pipe 400 .

In addition, the control unit 700 of the selective catalytic reduction system 101 according to the first embodiment of the present invention may open the rear valve 920 when the internal pressure of the reactor 200 exceeds a preset target pressure. have.

When the fluid is continuously supplied by the soot blower 301 in a closed loop state in which the front valve 910 and the rear valve 920 are closed, the control unit 700 controls the rear valve ( 920) can be opened to reduce the internal pressure of the reactor 200. At this time, the sulfur component remaining in the catalyst 210 or the reactor 200 may also be discharged together. That is, by opening the rear valve 920 , the control unit 700 can effectively prevent the inside of the reactor 200 from being corroded by the sulfur component remaining in the reactor 200 .

In addition, the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a first pressure detection member 810 and a second pressure detection member 820 and a third pressure detection member 830 have.

The first pressure detecting member 810 may detect the pressure of the exhaust gas passing through the bypass pipe 400 . Specifically, the first pressure detecting member 810 is installed on the main pipe 100 in front of the branch point of the bypass pipe 400 to measure the pressure of exhaust gas discharged from the engine 10 and flowing into the bypass pipe 400 . It can be detected and transmitted to the controller 700 .

The second pressure detecting member 820 may detect the pressure in front of the reactor 200 . That is, the second pressure detecting member 820 may detect the pressure flowing into the reactor 200 . Also, the second pressure detecting member 820 may be installed on the main pipe 100 between the front valve 910 and the reactor 200 . Specifically, when the front valve 910 is closed, the second pressure detecting member 820 may detect the pressure behind the front valve 910 .

The third pressure detecting member 830 may detect the pressure behind the reactor 200 . Also, the third pressure detecting member 830 may be installed on the main pipe 100 between the rear valve 920 and the reactor 200 . Specifically, when the rear valve 920 is closed, the third pressure detecting member 830 may detect the pressure in front of the rear valve 920 .

That is, when the front valve 910 and the rear valve 920 are closed by the control unit 700 , the second pressure detecting member 820 and the third pressure detecting member 830 return to the reactor 200 in a closed loop state. It is possible to detect the pressure of the fluid supplied by the soot blower 301 .

Accordingly, in the heating mode or the sealing mode, the control unit 700 detects the second pressure detection member 820 or the third pressure detection member 830 based on the information detected by the first pressure detection member 810 . The soot blower 301 may be controlled so that one piece of information is formed to be 0.1 bar to 0.2 bar higher than the first pressure detection member 810 .

Also, the controller 700 may compare the internal pressure information of the reactor 200 detected by the second pressure detecting member 820 or the third pressure detecting member 830 with a preset target pressure. Accordingly, the control unit 700 closes the rear valve 920 when the internal pressure information of the reactor 200 detected by the second pressure detecting member 820 or the third pressure detecting member 830 exceeds a preset target pressure. can be opened

Alternatively, when the internal pressure information of the reactor 200 detected by the second pressure detecting member 820 or the third pressure detecting member 830 is less than or equal to a preset target pressure, the control unit 700 may control the injection of the current soot blower 301 . You can keep moving.

In addition, the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a fourth pressure detection member (870).

The fourth pressure detecting member 870 may detect the pressure of the fluid stored in the tank 310 . Specifically, the fourth pressure detecting member 870 may detect the pressure of the fluid stored in the tank 310 and transmit it to the controller 700 .

When the soot blower 301 operates in the purification mode, the controller 700 may determine the shortage of the fluid stored in the tank 310 based on the information detected by the fourth pressure detection member 870 . Specifically, the control unit 700 compares the preset reference pressure with information detected by the fourth pressure detection member 870, and when the information detected by the fourth pressure detection member 870 is less than the preset reference pressure, the operator can generate an alarm. Therefore, the operator can recognize through the alarm that foreign substances such as soot attached to the catalyst 210 cannot be effectively discharged to the outside of the reactor 200 with the fluid currently stored in the tank 310 .

In addition, as shown in Figure 4, the heating member 350 of the selective catalytic reduction system 101 according to the first embodiment of the present invention is any one or more of the first pipe 330 or the second pipe 340 It can be installed inside.

The heating member 350 may be installed inside the hollow first pipe 330 or the second pipe 340 . Accordingly, the heating member 350 may heat the fluid supplied to the first pipe 330 or the second pipe 340 through the distribution pipe 320 . Specifically, when the heating member 350 is disposed inside any one or more of the first pipe 330 or the second pipe 340 , it is distributed from the distribution pipe 320 to the first pipe 330 or the second pipe. The fluid supplied to the 340 moves along the longitudinal direction of the first pipe 330 or the second pipe 340 and can be effectively heated. In addition, the heated fluid may be injected into the reactor 200 through the plurality of holes 331 and 341 formed in the first pipe 330 or the second pipe 340 .

When the heating member 350 is installed inside the hollow first pipe 330 or the second pipe 340, a separate space for installing the heating member 350 is unnecessary, so the selective catalytic reduction system 101 can be made compactly. In addition, when the heating member 350 is in direct contact with the exhaust gas, it is possible to effectively prevent contamination by foreign substances such as soot that may occur in the heating member 350 .

In addition, as shown in FIG. 4 , the soot blower 301 of the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a guide member 370 .

The guide member 370 may be installed inside the pipes 330 and 340 in which the heating member 350 is installed among the first pipe 330 or the second pipe 340 . In addition, the guide member 370 supports the heating member 350 and may guide the fluid passing through the pipes 330 and 340 to move effectively along the longitudinal direction of the pipes 330 and 340 . In addition, a plurality of guide holes 371 and 372 may be formed in the guide member 370 .

Specifically, a support hole 371 may be formed in the center of the guide member 370 . The heating member 350 may be inserted and supported in the support hole 371 . Also, a plurality of flow holes 372 may be formed to be spaced apart from each other in a radial direction around the support hole 371 . The plurality of flow holes 372 may guide the fluid to move along the longitudinal direction of the pipes 330 and 340 in which the heating member 350 is installed.

For example, a plurality of guide members 370 may be installed inside the pipes 330 and 340 along the longitudinal direction of the pipes 330 and 340 in which the heating member 350 is installed.

In addition, as shown in FIG. 5, the distribution pipe 320 and the first pipe 330 and the second pipe of the soot blower 301 of the selective catalytic reduction system 101 according to the first embodiment of the present invention ( 340) may be detachably coupled.

The other end of the distribution pipe 320 and the first pipe 330 and the second pipe 340 may be detachably coupled. Specifically, the other end of the distribution pipe 320 disposed outside the reactor 200 and the remaining portions of the first pipe 330 and the second pipe 340 may be detachably coupled to each other.

Therefore, the operator can perform the operation by easily separating them from the distribution pipe 320 outside the reactor 200 for maintenance of the first pipe 330 and the second pipe 340 . In addition, after inserting the first pipe 330 and the second pipe 340 into the flange region 220 in which the through hole is formed in the reactor 200 , the other end of the distribution pipe 320 from the outside of the reactor 200 and It can be combined for easy installation.

In addition, the soot blower 301 of the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a first supply valve 940 and a second supply valve 950 .

The first supply valve 940 and the second supply valve 950 may be installed in the distribution pipe 320 . Specifically, the first supply valve 940 and the second supply valve 950 may be spaced apart from each other and installed at the other end of the distribution pipe 320 .

The first supply valve 940 may be installed on the flow path of the other end of the distribution pipe 320 connected to the first pipe 330 .

The second supply valve 950 may be installed on the flow path of the other end of the distribution pipe 320 connected to the second pipe 340 .

The controller 700 may open or close the first supply valve 940 and the second supply valve 950 to selectively supply the fluid stored in the tank 310 to the reactor 200 . The operation of the soot blower 301 may also be achieved by the control unit 700 controlling the first supply valve 940 and the second supply valve 950 .

In addition, the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a supercharger 600 and an exhaust receiver 500 including a compressor 620 and a turbine 610 .

The exhaust receiver 500 evenly relieves the exhaust gas of the engine 10 discharged with an unbalanced pressure due to the cylinder reciprocating motion of the engine 10 . Specifically, the exhaust receiver 500 is installed on one side of the engine 10 to store the exhaust gas discharged from the engine 10 .

The turbine 610 of the supercharger 600 is rotated by the exhaust gas that has passed through the exhaust receiver 500 . That is, the turbine 610 of the supercharger 600 may be operated by exhaust gas having a uniform pressure. At this time, the compressor 620 connected to the turbine 610 also rotates and compresses the outside air to be supplied to the engine 10 .

The turbine 610 may be connected to the main pipe 100 . That is, the exhaust gas driving the turbine 610 may be supplied to the main pipe 100 .

In addition, the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a first temperature detection member 850 and a second temperature detection member 860 .

The first temperature detecting member 850 may be installed on the main pipe 100 between the front valve 910 and the reactor 200 . Specifically, the temperature information detected by the first temperature detecting member 850 may be transmitted to the controller 700 .

The second temperature detecting member 860 may be installed on the main pipe 100 between the rear valve 920 and the reactor 200 . Specifically, the temperature information detected by the second temperature detecting member 860 may be transmitted to the controller 700 .

When controlling the heating mode of the soot blower 301, the control unit 700 controls the temperature of the heating member 350 based on the information detected by the first temperature detecting member 850 or the second temperature detecting member 860. can

Specifically, the target temperature may be preset in the controller 700 . Accordingly, the control unit 700 continuously operates the heating member 350 until the temperature detected by the first temperature detecting member 850 or the second temperature detecting member 860 reaches a preset target temperature to thereby operate the reactor 200 . ) can increase the temperature of the fluid supplied to the inside.

In addition, when the temperature detected by the first temperature detecting member 850 or the second temperature detecting member 860 reaches a preset target temperature, the controller 700 may stop the operation of the heating member 350 . .

Hereinafter, a selective catalytic reduction system 102 according to a second embodiment of the present invention will be described. The selective catalytic reduction system 102 according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 8 .

The selective catalytic reduction system 102 according to the second embodiment of the present invention is the exhaust receiver 500 and the main pipe 100 and the reactor 200 of the selective catalytic reduction system 101 according to the first embodiment described above. With the soot blower 301 , the bypass pipe 400 , the bypass valve 930 , the first pressure detection member 810 , the second pressure detection member 820 , the third pressure detection member 830 and the fourth pressure detection It may include a member 870 , a front valve 910 , a rear valve 920 , a first temperature detection member 850 , and a second temperature detection member 860 .

The supercharger 600 of the selective catalytic reduction system 102 according to the second embodiment of the present invention is different from the configuration and arrangement position of the selective catalytic reduction system 101 according to the first embodiment.

The turbine 610 of the supercharger 600 is connected to the main pipe 100 behind the reactor 200 . Specifically, the supercharger 600 may be rotated by the exhaust gas that has passed through the bypass pipe 400 or the reactor 200 . That is, the reactor 200 and the bypass pipe 400 may be installed in front of the turbine 610 of the supercharger 600 .

In addition, the compressor 620 rotating together with the rotation of the turbine 610 of the supercharger 600 may compress the outside air and supply it to the engine 10 .

In addition, the selective catalytic reduction system 102 according to the second embodiment of the present invention may further include a vent pipe 750 and a vent valve 960 .

The vent pipe 750 may be branched from the main pipe 100 at the rear of the reactor 200 . In addition, one end of the vent pipe 750 may be branched from the main pipe 100 at the rear of the reactor 200 , and the other end may be opened. Specifically, one end of the vent pipe 750 may be branched from the main pipe 100 between the reactor 200 and the rear valve 920 .

The vent valve 960 may be disposed on the vent pipe 750 to control the flow of exhaust gas or fluid passing through the vent valve 960 . Also, the vent valve 960 may be controlled by the controller 700 .

When the fluid is continuously supplied by the soot blower 301 in a closed loop state in which the front valve 910 and the rear valve 920 are closed, the control unit 700 controls the vent valve ( 960) can be opened to reduce the pressure inside the reactor 200 . At this time, the sulfur component remaining in the catalyst 210 or the reactor 200 may also be discharged together. That is, the controller 700 may open the vent valve 960 to effectively prevent corrosion of the inside of the reactor 200 by the sulfur component remaining in the reactor 200 .

In addition, in the selective catalytic reduction system 102 according to the second embodiment of the present invention, the fluid exceeding the preset target pressure in the closed loop state in which the front valve 910 and the rear valve 920 are closed is the rear valve 920 is opened and supplied to the turbine 610 of the supercharger 600, the rotation speed of the turbine 610 is changed by its pressure or flow rate, and the compressor 620 for supplying combustion air to the combustion chamber of the engine 10 accordingly By opening the vent valve 960, the problem of unstable supply of air to the engine 10 by changing the rotation of the engine 10 can be effectively solved.

That is, the selective catalytic reduction system 102 according to the second embodiment of the present invention includes a vent pipe 750 and a vent valve 960, so that the front valve 910 and the rear valve 920 are closed closed loops. In this state, it is possible to effectively prevent the fluid having a pressure greater than or equal to the preset pressure supplied to the reactor 200 by the soot blower 301 from being supercharged to the turbine 610 of the turbocharger 600 .

Specifically, the control unit 700, in the heating mode or the sealing mode, based on the information detected by the first pressure detecting member 810, the second pressure detecting member 820 or the third pressure detecting member 830 The soot blower 301 may be controlled such that the detected information is formed to be 0.1 bar to 0.2 bar higher than the pressure detected by the first pressure detecting member 810 .

Also, the controller 700 may compare the internal pressure information of the reactor 200 detected by the second pressure detecting member 820 or the third pressure detecting member 830 with a preset target pressure. Accordingly, the control unit 700 closes the vent valve 960 when the internal pressure information of the reactor 200 detected by the second pressure detecting member 820 or the third pressure detecting member 830 exceeds a preset target pressure. can be opened

Alternatively, when the internal pressure information of the reactor 200 detected by the second pressure detecting member 820 or the third pressure detecting member 830 is less than or equal to a preset target pressure, the control unit 700 may control the injection of the current soot blower 301 . You can keep moving.

Hereinafter, the selective catalytic reduction system 103 according to the third embodiment of the present invention is different from the installation position of the heating member 350 of the soot blower 301 of the selective catalytic reduction system 101 and 102 described above. That is, the selective catalytic reduction system 103 according to the third embodiment of the present invention, except for the installation position of the heating member 350 of the soot blower 302, the selective catalytic reduction system according to the first embodiment described above (101) or the selective catalytic reduction system 102 according to the second embodiment may include the same remaining configuration as any one of.

The heating member 350 of the selective catalytic reduction system 302 according to the third embodiment of the present invention is, as shown in FIG. 9, in any one or more of the first pipe 330 or the second pipe 340 The first pipe 330 or the second pipe 340 may be installed by being wound around the outer circumferential surface along the longitudinal direction. Specifically, the heating member 350 is spaced apart from the plurality of injection holes 331 formed in the first pipe 330 or the plurality of injection holes 341 formed in the second pipe 340 and the first pipe 330 or The second pipe 340 may be wound and installed on the outer circumferential surface along the longitudinal direction.

Therefore, the heating member 350 is effectively supplied by the heating member 350 when the fluid supplied from the tank 310 and distributed through the distribution pipe 320 moves along the first pipe 330 or the second pipe 340 . can be heated. This heated fluid may be supplied to the reactor 200 when the controller 700 controls the soot blower 302 in the heating mode.

That is, the heating member 350 may be wound and installed on the outer circumferential surface along the longitudinal direction of the first pipe 330 or the second pipe 340 , and thus the hollow first pipe 330 or the second pipe 340 . ) can effectively heat the fluid moving along the longitudinal direction and can be installed compactly because a separate space is not required at the installation location.

Hereinafter, the selective catalytic reduction system 104 according to the fourth embodiment of the present invention is different from the installation position of the heating member 350 of the soot blower 301 of the selective catalytic reduction system 101 and 102 described above. That is, the selective catalytic reduction system 104 according to the fourth embodiment of the present invention, except for the installation position of the heating member 350 of the soot blower 301, the selective catalytic reduction system according to the first embodiment described above (101) or the selective catalytic reduction system 102 according to the second embodiment may include the same remaining configuration as any one of.

The heating member 350 of the selective catalytic reduction system 104 according to the fourth embodiment of the present invention may be disposed between the inner circumferential surface of the reactor 200 and the outer circumferential surface of the catalyst 210, as shown in FIG. have.

The heating member 350 may be disposed between the outer circumferential surface of the catalyst 210 disposed inside the reactor 200 and the inner circumferential surface of the reactor 200 . Therefore, the heating member 350 can effectively heat the fluid supplied from the soot blower 301 shown in FIG. 1 or 6 directly inside the reactor 200 without requiring a separate installation space.

Hereinafter, a selective catalytic reduction system 105 according to a fifth embodiment of the present invention is included. The selective catalytic reduction system 105 according to the fifth embodiment of the present invention is any one of the selective catalytic reduction system 101 or the selective catalytic reduction system 102 according to the second embodiment according to the first embodiment described above The same exhaust receiver 500, the supercharger 600, the main pipe 100, the bypass pipe 400, the reactor 200 in which the catalyst 210 is installed, the front valve 910, and the rear valve 920 ), the bypass valve 930, the first pressure detecting member 810, the second pressure detecting member 820, the third pressure detecting member 830, the fourth pressure detecting member 870, It may further include a first temperature detecting member 850 , a second temperature detecting member 860 , or a vent pipe 750 and a vent valve 960 .

In addition, the selective catalytic reduction system 105 according to the fifth embodiment of the present invention, as shown in FIG. 11 , a sub pipe 550 , a blower 560 , a heating member 570 , and a control unit 700 . may include

The sub pipe 550 is branched from the rear of the reactor 200 and merges into the front of the reactor 200 . In addition, the sub pipe 550 may guide the exhaust gas or fluid passing through the reactor 200 to flow into the reactor 200 forward flow. Specifically, one end of the sub pipe 550 may be connected to the rear of the reactor 200 , and the other end of the sub pipe 550 may be inserted and installed in front of the reactor 200 . Also, a plurality of holes may be formed at the other end of the sub pipe 550 .

The blower 560 may be disposed on the sub-pipe 550 . In addition, the blower 560 may control the flow of the fluid such that the fluid or exhaust gas flows into the sub-pipe 550 .

The heating member 570 may be disposed on the sub pipe 550 . In addition, the heating member 570 may heat a fluid or exhaust gas passing through the sub-pipe 550 . Specifically, the heating member 570 may be disposed closer to the front of the reactor 200 than the blower 560 .

The controller 700 may control the blower 560 and the heating member 570 . The control unit 700 determines whether a ship installed with a selective catalytic reduction system 105 for reducing nitrogen oxides contained in the exhaust gas of the engine 10 passes through an exhaust gas emission control area. In addition, the control unit 700 determines whether the vessel is currently operating. Therefore, the control unit 700 allows the exhaust gas to pass through the bypass pipe 400 when the vessel is in the exhaust gas emission control area and the operation of the vessel is stopped, and the blower 560 and the heating member 570 can be operated. have.

That is, the controller 700 may control the exhaust gas remaining in the reactor 200 and the exhaust gas passing through the catalyst 210 to be supplied to the front of the reactor 200 through the sub-pipe 550 . Therefore, when the catalyst 210 is not used because the ship is in the exhaust gas emission control area and the ship is in operation, the control unit 700 heats the exhaust gas with reduced nitrogen oxide to the catalyst ( 210) can be resupplied. Thus, the control unit 700 is the reactor 200 and the catalyst ( 200 ) and the catalyst ( 210) can effectively prevent corrosion.

In other words, the control unit 700 can prevent corrosion of the reactor 200 and the catalyst 210 when the catalyst 210 is not used because the vessel is in the emission control area and the vessel is in operation. It is possible to supply exhaust gas with reduced nitrogen oxides heated to maintain the temperature.

In addition, the selective catalytic reduction system 105 according to the fifth embodiment of the present invention may further include a first sub-valve 980 and a second sub-valve 990 .

The first sub-valve 980 may be disposed on the sub-pipe 550 . In addition, the first sub-valve 980 is installed closer to the rear of the reactor 200 than the front of the reactor 200 among the sub-pipes 550 to control the flow of fluid or exhaust gas flowing into the sub-pipes 550 . can

The second sub-valve 990 may be disposed on the sub-pipe 550 to be spaced apart from the first sub-valve 980 . In addition, the second sub-valve 99 is installed closer to the front of the reactor 200 than the heating member 570 among the sub-pipes 550 , and the fluid flowing into the reactor 200 through the sub-pipes 550 or The exhaust gas flow can be blocked.

Specifically, at this time, as shown in FIG. 2 or 7 , the controller 700 may close the front valve 910 and the rear valve 920 and open the bypass valve 930 . In addition, the control unit 700 may open the first sub-valve 980 and the second sub-valve 990 . A closed loop may be formed between the reactor 200 and the sub-pipe 550 between the front valve 910 and the rear valve 920 . Accordingly, the nitrogen oxide remaining between the closed loops is reduced according to the operation of the blower 560 and the heating member 570 , so that the heated exhaust gas can be continuously circulated.

In addition, the selective catalytic reduction system 105 according to the fifth embodiment of the present invention includes a tank 310 in which a fluid is stored, a distribution pipe 320 , a first pipe 330 , and a second pipe 340 . It may include a soot blower 303 including. This soot blower 303 may be operated by the control unit 700 when the vessel is in an exhaust gas emission control area and the engine 10 is operating.

The tank 310 stores a fluid. Specifically, the fluid to be injected into the reactor 200 is stored in the tank 310 . For example, the fluid stored in the tank 310 may be compressed air.

One end of the distribution pipe 320 is connected to the tank 310 . In addition, the distribution pipe 320 distributes the stored fluid from the tank 310 . Specifically, the other end of the distribution pipe 320 may be formed to have a plurality of flow paths.

The first pipe 330 may be inserted and installed inside the reactor 200 . Also, the first pipe 330 may be connected to any one of a plurality of flow paths formed at the other end of the distribution pipe 320 . Specifically, a plurality of injection holes 331 may be formed in the first pipe 330 in the longitudinal direction of the first pipe 330 . For example, at least a portion of the first pipe 330 may be inserted into the reactor 200 , and the remainder may be connected to the distribution pipe 320 disposed outside the reactor 200 .

In addition, the first pipe 330 may be disposed in front of any one of the catalysts of the plurality of catalysts 210 installed inside the reactor 200 .

The second pipe 340 may be inserted and installed inside the reactor 200 . In addition, the second pipe 340 is spaced apart from the first pipe 330 . In addition, the second pipe 340 may be connected to any one of a plurality of flow paths formed at the other end of the distribution pipe 320 . When two flow paths are formed at the other end of the distribution pipe 320 , one may be connected to the first pipe 330 and the other may be connected to the second pipe 340 . Specifically, a plurality of injection holes 341 may be formed in the second pipe 340 in the longitudinal direction of the second pipe 340 . For example, at least a portion of the second pipe 340 may be inserted into the reactor 200 , and the remainder may be connected to the distribution pipe 320 disposed outside the reactor 200 .

In addition, the second pipe 340 may be disposed in front of the other one of the catalysts of the plurality of catalysts 210 installed inside the reactor 200 .

That is, the fluid stored in the tank 310 passes through the distribution pipe 320 and is distributed to the first pipe 330 and the second pipe 340 , and a plurality of injection holes 331 formed in the first pipe 330 . And it may be sprayed through the plurality of injection holes 341 formed in the second pipe (340).

Hereinafter, with reference to FIGS. 1 to 8 and FIGS. 12 to 14 , the operation process of the selective catalytic reduction system 101 and 102 according to the first and second embodiments of the present invention will be described.

The control unit 700 determines whether the ship is in the emission control area through the route information of the ship. When it is determined that the vessel is in the emission control area, the control unit 700 determines whether the vessel operates.

Hereinafter, a case in which it is determined that the vessel is in the emission control area and the vessel is in operation will be described.

When it is determined that the vessel is in the emission control area and the vessel is in operation, the control unit 700 opens the rear valve 920 as shown in FIGS. 1 and 13 ( S500 ).

Also, the control unit 700 opens the front valve 910 (S510). And close the bypass valve 930 (S520). That is, the control unit 700 may allow the exhaust gas discharged from the engine 10 to be discharged after passing through the reactor 200 through the main pipe 100 .

At this time, although not shown in FIG. 1 , the control unit 700 may control the reducing agent injection member to inject the reducing agent into the main pipe 100 in front of the reactor 200 . The exhaust gas mixed with the sprayed reducing agent passes through the catalyst 210 and the nitrogen oxides are decomposed into water (or water vapor) and nitrogen and discharged to the outside. That is, when the ship is in the exhaust gas emission control area and the ship is operating, the selective catalytic reduction system 101 can reduce nitrogen oxide contained in the exhaust gas and discharge it to the outside.

And the control unit 700 causes the soot blower 301 to operate in the purification mode (S530). That is, when the soot blower 301 is operated in the purification mode, the soot blower 301 injects the fluid stored in the tank 310 to the catalyst 210 according to a preset cycle to thereby inject foreign substances such as soot attached to the catalyst 210 . to be discharged to the outside. Specifically, the control unit 700 may open and close the first supply valve 940 and the second supply valve 950 according to a preset cycle. At this time, the soot blower 301 is used to remove the soot adhering to the catalyst 210 .

The control unit 700 compares the pressure of the fluid stored in the tank 310 detected by the fourth pressure detecting member 870 with a preset reference pressure (S540). That is, the controller 700 may determine whether a fluid having a flow rate and pressure sufficient to remove the soot adhering to the catalyst 210 remains in the tank 310 .

When the pressure of the fluid stored in the tank 310 detected by the fourth pressure detection member 870 is less than a preset reference pressure, the control unit 700 generates an alarm to the operator (S550). At this time, the operator may recognize that the pressure of the fluid in the tank 310 is lowered through the alarm and fill the tank 310 with the fluid or replace the tank 310 .

And the control unit 700 so that the reducing agent injection is stopped (S560). That is, the control unit 700 may stop the reducing agent injection until the soot blower 301 normalizes the pressure of the tank 310 required for normal operation.

Alternatively, when the pressure of the fluid stored in the tank 310 detected by the fourth pressure detecting member 870 is equal to or greater than a preset reference pressure, the controller 700 returns the soot blower 301 to the purification mode according to a preset cycle. Operation The first supply valve 940 and the second supply valve 950 may be opened and closed according to a preset cycle.

Hereinafter, a case in which the vessel is in the emission control area and the operation of the vessel is stopped will be described.

Alternatively, when the control unit 700 determines that the vessel is in the emission control area and the vessel is stopped, the control unit 700 operates the bypass valve 930 as shown in FIGS. 1 to 3 and 12 . Open (S100).

Also, the control unit 700 closes the front valve 910 and the rear valve 920 ( S200 ). That is, the control unit 700 may allow the exhaust gas to be discharged by bypassing the reactor 200 through the bypass pipe 400 .

The control unit 700 causes the soot blower 301 to operate in the heating mode (S400). In addition, the control unit 700 operates the heating member 350 so that the fluid supplied to the reactor 200 by the soot blower 301 is heated (S300).

The controller 700 controls the heating member 301 until the temperature of the fluid supplied into the reactor 200 detected by the first temperature detecting member 850 or the second temperature detecting member 860 reaches a preset target temperature. ) is operated (S310).

The control unit 700 determines whether the engine 10 is currently operating (S320). And when it is determined that the engine 10 is in operation, the control unit 700 stops the operation of the heating member 350 ( S330 ). At this time, when it is determined that the engine 10 is in operation, the controller 700 may determine again whether the reduction of nitrogen oxides contained in the exhaust gas is required.

Alternatively, when it is determined that the engine 10 is currently in operation, the controller 700 may control the heating member 350 so that the fluid supplied to the reactor 200 maintains a preset target temperature (S310). .

The control unit 700 controls the pressure of the fluid supplied to the reactor 200 by the soot blower 301 (S410). Specifically, the control unit 700 determines that the second pressure detecting member 820 or the third pressure detecting member 830 is higher than the pressure of the exhaust gas passing through the bypass pipe 400 detected by the first pressure detecting member 810 . The first supply valve 940 and the second supply valve 950 may be controlled so that the detected pressure of the fluid introduced into the reactor 200 is 0.1 bar to 0.2 bar higher.

The control unit 700 determines whether any one of the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is greater than a preset target pressure (S420). That is, the controller 700 may determine whether the fluid introduced into the reactor 200 is supplied greater than a preset target pressure.

The control unit 700, when any one of the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is less than or equal to a preset target pressure, the soot blower 301 is the reactor ( 200), the first supply valve 940 and the second supply valve 950 are controlled to continuously supply the fluid (S410).

Alternatively, if the control unit 700 determines that either the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is greater than the preset target pressure, the first embodiment of the present invention Like the selective catalytic reduction system 101 of the first embodiment, the reactor 200 is installed in the rear of the turbine 610 of the supercharger 600, whether the low-pressure engine 10 (LP) or the selective catalytic reduction system of the second embodiment of the present invention It is determined whether the reactor 200 is installed in front of the turbine 610 of the supercharger 600 as shown in 102, the high-pressure engine 10 (HP) (S430).

Control unit 700, as shown in Figures 3 and 12, the reactor 200 is installed in the rear of the turbine 610 of the supercharger 600, like the selective catalytic reduction system 101 of the first embodiment of the present invention. If it is determined that there is, the rear valve 920 is opened (S450).

Thereafter, the control unit 700 determines that either the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is less than a preset target pressure ( S460 ). Specifically, the target pressure of S420 and the target pressure of S460 may be different values. For example, the target pressure of S420 may be greater than the target pressure of S460.

And, when any one of the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is less than the preset target pressure, the control unit 700 closes the rear valve 920 . Close (S470). That is, the control unit 700 controls the rear valve 920 until either the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 becomes smaller than the preset target pressure. After maintaining the open of the rear valve 920 is closed. Accordingly, the sulfur component remaining in the reactor 200 may be discharged together with the fluid when the rear valve 920 is opened.

Alternatively, when any one of the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is greater than or equal to a preset target pressure, the control unit 700 may open the rear valve 920 . can keep

After closing the rear valve 920 , the controller 700 determines whether the engine 10 is currently operating ( S480 ). Specifically, the control unit 700 may determine whether the engine 10 is currently operating based on the output of the engine 10 or an electrical signal light of the engine 10 .

When it is determined that the engine 10 is currently operating, the control unit 700 stops the operation of the soot blower 301 (S490). Specifically, the controller 700 may close the first supply valve 940 and the second supply valve 950 so that the supply of the fluid supplied from the soot blower 301 to the reactor 200 is stopped. And, the control unit 700 may be controlled when the soot blower 301 is a vessel in an exhaust gas emission control area and the vessel is operating.

Alternatively, when the controller 700 determines that the engine 10 is currently in operation, that is, the controller 700 determines that the operation of the engine 10 is in a stopped state while the vessel is currently moored. can Therefore, the control unit 700 controls the soot blower 301 so that the pressure inside the reactor 200 is 0.1 bar to 0.2 bar higher than the pressure of the exhaust gas passing through the bypass pipe 400 through which the exhaust gas gas passes ( S410).

That is, when the vessel is in the exhaust gas emission control area and the vessel is stopped, the controller 700 may supply a heated fluid to the reactor 200 and adjust the pressure of the fluid supplied to the reactor 200 . Therefore, the control unit 700 can maintain the temperature of the reactor 200 at about 200 degrees (℃) or more when the catalyst 210 is not used, thereby effectively preventing corrosion of the catalyst 210 and the reactor 200. can In addition, the control unit 700 may effectively discharge the sulfur component remaining inside the reactor 200 to the outside of the reactor 200 .

Alternatively, the control unit 700, as shown in FIGS. 8 and 12, the reactor 200 in front of the turbine 610 of the supercharger 600, such as the selective catalytic reduction system 102 of the second embodiment of the present invention. When it is determined that is installed, the vent valve 960 is opened (S440). The subsequent process is the same as the process after opening the rear valve 920 of the selective catalytic reduction system 101 of the first embodiment of the present invention described above.

If, such as the selective catalytic reduction system 101 according to the first embodiment of the present invention or the selective catalytic reduction system 102 according to the second embodiment of the present invention, the type characteristics of the engine 10 in the control unit 700, etc. If the position of the supercharger 600 is set in advance, the control unit 700 may open the rear valve 920 (S450) or open the vent valve 960 (S440) without a separate determination step (S430).

Hereinafter, a case in which the ship is in a non-regulated area for exhaust gas emission and the ship is in operation will be described.

When the control unit 700 determines that the vessel is in an exhaust gas emission non-regulated area and the vessel is in operation, as shown in FIGS. 2, 6 and 14 , the control unit 700 opens the bypass valve 930 ( S600 ).

Also, the control unit 700 closes the front valve 910 and the rear valve 920 ( S700 ). That is, the exhaust gas containing nitrogen oxide discharged from the engine 10 is discharged to the outside through the bypass pipe 400 . That is, when the ship has an exhaust gas emission non-regulated area, the selective catalytic reduction systems 101 and 102 can discharge nitrogen oxides contained in the exhaust gas to the outside without reducing it.

The control unit 700 operates the soot blower 301 in the sealing mode (S800).

The control unit 700 controls the soot blower 301 so that the pressure of the fluid supplied to the reactor 200 by the soot blower 301 is higher than the pressure of the exhaust gas passing through the bypass pipe 400 (S810). Specifically, the control unit 700 maintains the pressure detected by the second pressure detecting member 820 or the third pressure detecting member 830 is 0.1 bar to 0.2 bar higher than the pressure detected by the first pressure detecting member 810 It is possible to control the first supply valve 940 and the second supply valve 950 so that the

The control unit 700 determines whether any one of the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is greater than a preset target pressure (S820). That is, the controller 700 may determine whether the fluid introduced into the reactor 200 is supplied greater than a preset target pressure.

The control unit 700, when any one of the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is less than or equal to a preset target pressure, the soot blower 301 is the reactor ( 200), the first supply valve 940 and the second supply valve 950 are controlled to continuously supply the fluid (S810).

Alternatively, if the control unit 700 determines that either the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is greater than the preset target pressure, the control unit 700 is Whether the reactor 200 is installed behind the turbine 610 of the supercharger 600, such as the selective catalytic reduction system 101 of the first embodiment of the present invention, the low-pressure engine 10 (LP) or the second embodiment of the present invention. It is determined whether the reactor 200 is installed in front of the turbine 610 of the supercharger 600, such as the selective catalytic reduction system 102, the high-pressure engine 10 (HP) (S830).

Control unit 700, as shown in Figures 3 and 14, the reactor 200 is installed in the rear of the turbine 610 of the supercharger 600, like the selective catalytic reduction system 101 of the first embodiment of the present invention. If it is determined that there is, the rear valve 920 is opened (S850).

Thereafter, the control unit 700 determines that either the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is smaller than a preset target pressure ( S860 ). And, when any one of the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is less than the preset target pressure, the control unit 700 closes the rear valve 920 . Close (S870). That is, the control unit 700 controls the rear valve 920 until either the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 becomes smaller than the preset target pressure. After maintaining the open of the rear valve 920 is closed. Accordingly, the sulfur component remaining in the reactor 200 may be discharged together with the fluid when the rear valve 920 is opened.

Alternatively, when any one of the pressure detected by the second pressure detection member 820 or the pressure detected by the third pressure detection member 830 is greater than or equal to a preset target pressure, the control unit 700 may open the rear valve 920 . can keep

After closing the rear valve 920, the control unit 700 determines whether the engine 10 is currently operating (S880). Specifically, the control unit 700 may determine whether the engine 10 is currently operating based on the output of the engine 10 or an electrical signal light of the engine 10 .

When it is determined that the engine 10 is currently in operation, the control unit 700 stops the operation of the soot blower 301 (S890). Specifically, the controller 700 may close the first supply valve 940 and the second supply valve 950 so that the supply of the fluid supplied from the soot blower 301 to the reactor 200 is stopped.

Alternatively, the control unit 700, when it is determined that the engine 10 is currently operating, the pressure inside the reactor 200 is 0.1 bar to less than the pressure of the exhaust gas passing through the bypass pipe 400 through which the exhaust gas passes. Control the soot blower 301 to 0.2bar higher (S810).

Alternatively, the control unit 700, as shown in FIGS. 8 and 14, the reactor 200 in front of the turbine 610 of the supercharger 600, such as the selective catalytic reduction system 102 of the second embodiment of the present invention. When it is determined that is installed, the vent valve 960 is opened (S840). The subsequent process is the same as the process after opening the rear valve 920 of the selective catalytic reduction system 101 of the first embodiment of the present invention described above.

Hereinafter, with reference to FIGS. 1, 7, 11 and 15, the operation process of the selective catalytic reduction system 105 according to a fifth embodiment of the present invention will be described.

Hereinafter, a case in which the vessel is in the emission control area and the operation of the vessel is stopped will be described.

Alternatively, when the control unit 700 determines that the vessel is in the emission control area and the vessel is stopped, as shown in FIGS. 1, 7, 11 and 15, the bypass valve 930 to open (S900). At this time, the exhaust gas remaining in the main pipe 100 may be discharged to the outside through the bypass pipe 400 .

The control unit 700 closes the front valve 910 and the rear valve 920 (S910). Also, the control unit 700 opens the first sub-valve 980 and the second sub-valve 990 . That is, the controller 700 may cause the reactor 200 and the sub-pipe 550 between the front valve 910 and the rear valve 920 to form a closed loop.

The control unit 700 operates the blower 560 (S920). In addition, the control unit 700 operates the heating member 570 (S930). That is, the control unit 700 may allow the exhaust gas remaining in the reactor 200 to pass through the catalyst 210 to reduce nitrogen oxide and then heat it back to the front of the reactor 200 to be supplied. Accordingly, when the catalyst 210 is not used, the controller 700 can effectively prevent the reactor 200 and the catalyst 210 from being corroded.

The controller 700 controls the temperature inside the reactor 200 by the heating member 570 until it reaches a preset target temperature (S940). Specifically, the controller 700 may control the heating member 570 so that the temperature inside the reactor 200 is maintained at 200 degrees (℃) or more.

The control unit 700 determines whether the engine 10 is currently operating (S950). At this time, when it is determined that the engine 10 is operating, the control unit 700 stops the operation of the heating member 570 ( S960 ). In addition, the control unit 700 stops the operation of the blower 560 (S970). That is, the control unit 700 may stop the operation of the blower 560 and the heating member 570 when it is determined that the engine 10 of the vessel in the exhaust gas emission control area and the operation is stopped is operating. And, the control unit 700 may control the selective catalytic reduction system 105 by determining whether the vessel is operating on the basis of the output or the electrical signal of the engine 10 .

Alternatively, when it is determined that the engine 10 is being stopped, the controller 700 may control the heating member 570 so that the fluid supplied to the reactor 200 maintains a preset target temperature (S940). That is, when the engine 10 of the vessel in which the operation is stopped and in the exhaust gas emission control area does not operate, the control unit 700 controls the heating member ( 570) can be maintained continuously. In other words, when the engine 10 of a ship in an exhaust gas emission control area and the operation is stopped is not operated, the high-temperature thermal energy is transferred to the reactor 200. It can be circulated while maintaining a set temperature between the and the sub pipe 550 .

Hereinafter, a case in which the vessel is in the emission control area and the vessel is in operation will be described.

The control unit 700 opens the front valve 910 and the rear valve 920 , and closes the bypass valve 930 , the first sub-valve 980 , and the second sub-valve 990 . Then, the control unit 700 controls the reducing agent injection device (not shown) to inject the reducing agent to the exhaust gas, and controls the opening and closing cycles of the first supply valve 940 and the second supply valve 950 according to a preset cycle to control the suit The blower 303 is controlled. The following process can be controlled in the same way as when the ship of the selective catalytic reduction system 101 of the first embodiment of the present invention described above is in the emission control area and the ship is in operation. In this case, the soot blower 303 may be operated according to a preset cycle.

Hereinafter, a case in which the ship is located in an area not regulated for exhaust gas emission and the ship is operating will be described. The controller 700 opens the bypass valve 930 , the first sub-valve 980 , and the second sub-valve 990 , and closes the front valve 910 and the rear valve 920 . In addition, the controller 700 may operate the blower 560 to control the exhaust gas having reduced nitrogen oxides to circulate between the closed loop between the reactor 200 and the sub-pipe 550 .

By such a configuration, the selective catalytic reduction system 101, 102, 103, 104, 105 according to the embodiments of the present invention can effectively prevent the catalyst 210 from being contaminated from soot or sulfur components depending on the position and operation of the ship, thereby reducing the lifespan. have.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. will be.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims, the meaning and scope of the claims, and All changes or modifications derived from the equivalent concept should be construed as being included in the scope of the present invention.

100: main pipe 101,102,103,104,105: selective catalytic reduction system
200: reactor 210: catalyst
301,302,303: soot blower 310: tank
320: distribution pipe 330: first pipe
340: second pipe 350: heating member
370: guide member 400: bypass pipe
550: sub pipe 560: blower
570: heating member 700: control unit
910: front valve 920: rear valve
930: bypass valve 960: vent valve
750: vent pipe

Claims (13)

In the selective catalytic reduction system for selectively reducing nitrogen oxides contained in exhaust gas discharged from an engine installed on a ship,
a main pipe through which the exhaust gas passes;
a reactor having a catalyst installed therein and installed on the main pipe;
A tank in which a fluid is stored, a distribution pipe for distributing the stored fluid from the tank, a first pipe partly inserted into the reactor and supplying the fluid distributed from the distribution pipe, and a part of the second pipe inside the reactor a soot blower spaced apart from the first pipe and including a second pipe for supplying the fluid distributed from the distribution pipe;
a rear valve installed on the main pipe behind the reactor;
a vent pipe branching from the main pipe between the reactor and the rear valve;
a vent valve installed on the vent pipe;
a control unit for controlling the soot blower according to the operation region of the vessel and opening the vent valve when the internal pressure of the reactor exceeds a preset target pressure; and
A heating member disposed between the inner circumferential surface of the reactor and the outer circumferential surface of the catalyst to increase the temperature of the fluid supplied to the reactor
A selective catalytic reduction system comprising a. In claim 1,
Further comprising a bypass pipe for guiding the exhaust gas to be discharged by bypassing the reactor,
The control unit is
When the vessel is in the emission control area and the vessel is operating, the exhaust gas is passed through the main pipe and the soot blower is controlled to operate in a purification mode of a preset cycle,
When the vessel is in an exhaust gas emission control area and the operation of the vessel is stopped, the exhaust gas is passed through the bypass pipe, the heating member is operated, and the soot blower is controlled to operate in a heating mode to control the fluid pressure a selective catalytic reduction system. In claim 2,
The control unit is
Selective catalyst, characterized in that when the ship is in a non-regulated area for exhaust gas emission and the ship is operating, the exhaust gas passes through the bypass pipe and is controlled to operate in a sealing mode to control the fluid pressure of the soot blower reduction system. In claim 3,
a front valve installed on the main pipe in front of the reactor; and
Further comprising a bypass valve installed on the bypass pipe,
The control unit is
When the exhaust gas passes through the bypass pipe, the bypass valve is opened and the front valve and the rear valve are closed,
Selective catalytic reduction system, characterized in that when the exhaust gas passes through the main pipe, the bypass valve is closed and the front valve and the rear valve are opened. In claim 4,
The control unit is
Selective catalytic reduction system, characterized in that when controlling the fluid pressure of the soot blower, the fluid pressure of the soot blower is controlled so that the internal pressure of the reactor is greater than the pressure of the exhaust gas passing through the bypass pipe. In the selective catalytic reduction system for selectively reducing nitrogen oxides contained in exhaust gas discharged from an engine installed on a ship,
a main pipe through which the exhaust gas passes;
a reactor having a catalyst installed therein and installed on the main pipe;
A tank in which a fluid is stored, a distribution pipe for distributing the stored fluid from the tank, a first pipe partly inserted into the reactor and supplying the fluid distributed from the distribution pipe, and a part of the second pipe inside the reactor a soot blower spaced apart from the first pipe and including a second pipe for supplying the fluid distributed from the distribution pipe;
a bypass pipe for guiding the exhaust gas to be discharged by bypassing the reactor;
a front valve installed on the main pipe in front of the reactor;
a rear valve installed on the main pipe behind the reactor;
a bypass valve installed on the bypass pipe; and
Controls the soot blower according to the operation area of the ship, and when exhaust gas passes through the bypass pipe, opens the bypass valve and closes the front valve and the rear valve, and when the exhaust gas passes through the main pipe , close the bypass valve, open the front valve and the rear valve, determine whether the internal pressure of the reactor exceeds a preset target pressure, and when the internal pressure of the reactor exceeds a preset target pressure, installed on the ship A control unit that determines whether the engine is a high-pressure engine or a low-pressure engine and opens the rear valve when the engine installed in the ship is a low-pressure engine
A selective catalytic reduction system comprising a. delete In the selective catalytic reduction system for selectively reducing nitrogen oxides contained in exhaust gas discharged from an engine installed on a ship,
a main pipe through which the exhaust gas passes;
a reactor having a catalyst installed therein and installed on the main pipe;
A tank in which a fluid is stored, a distribution pipe for distributing the stored fluid from the tank, a first pipe partly inserted into the reactor and supplying the fluid distributed from the distribution pipe, and a part of the second pipe inside the reactor a soot blower spaced apart from the first pipe and including a second pipe for supplying the fluid distributed from the distribution pipe;
a rear valve installed on the main pipe behind the reactor;
a vent pipe branching from the main pipe between the reactor and the rear valve;
a vent valve installed on the vent pipe; and
a control unit for controlling the soot blower according to the operation region of the vessel and opening the vent valve when the internal pressure of the reactor exceeds a preset target pressure;
Including a heating member installed in any one or more of the first pipe or the second pipe,
The soot blower,
The selective catalytic reduction system further comprising a guide member installed inside the pipe in which the heating member is installed among the first pipe or the second pipe, supporting the heating member and guiding the flow of the fluid passing through the pipe. delete delete delete In claim 1,
The selective catalytic reduction system, characterized in that the distribution pipe and the first pipe and the second pipe of the soot blower are detachably coupled. delete

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