KR102450817B1 - Exhaust gas treatment system for ship and operating method thereof - Google Patents

Abstract

Disclosed are an exhaust gas treatment system for a ship and an operating method thereof. The exhaust gas treatment system for a ship includes: an inflow route of gas emitted from an engine of a small ship; first and second passages which are extended from a branching portion on an end of the inflow route, and of which one has a length shorter than another one; a plurality of exhaust emission control devices which are disposed on the first passage; an outflow route which is joined and extended from an end of the first and second passages so that the gas, which has passed through at least one between the first and second passages, can pass therethrough to be emitted; and a control unit which controls the gas to flow through at least one between the first and second passages. The first passage has a length longer than the second passage and includes a plurality of bypass routes to allow the gas to flow in a direction different from a direction in which the gas flows in the second passage. The second passage has a length shorter than the first passage and has a straight-line route to allow the gas to flow in a direction parallel to a direction in which the gas flows in the inflow route and the outflow route. The first passage and the second passage share at least a part of a wall surface forming the first and second passages. According to the present invention, the exhaust gas treatment system for a ship can effectively build a passage and maximize space efficiency in a small ship, which lacks a space required for installation although the installation of an exhaust emission control device for gas emission has been obligated according to strengthened marine environment pollution regulations.

Description

Exhaust gas treatment system for ships and operating method thereof

The present invention is an exhaust gas treatment for ships that can maximize space efficiency by effectively constructing a flow path in a small vessel that is obliged to install an exhaust gas purifying device according to the strengthened marine environment pollution regulations, but lacks the space required for installation. It relates to a system and its operation method.

Ships can transport a large amount of goods at a relatively low cost, and therefore, a significant part of the volume of imports and exports between countries uses ships.

Ships operate internal combustion engines using heavy oil, etc. as raw materials, seriously affecting air pollution in sea routes and ports, and various regulations are being introduced. For example, the International Maritime Organization (IMO) is in a situation where the emission regulation on nitrogen oxide (NOx) emitted by ships is gradually stricter according to the plan.

Small ships, mainly used for coastal fishing and cargo transportation, are pointed out as direct pollutant emission sources near ports and ports.

In order to install the exhaust gas treatment system, more than a certain amount of installation space is required in the engine room, etc., but in the case of small ships, it is difficult to secure the installation space, so an exhaust gas treatment system optimized for the installation space is required.

In addition, there is a need for an exhaust gas treatment system capable of maximizing operational efficiency by optimizing the operation according to the operating conditions of the vessel.

SUMMARY OF THE INVENTION The present invention aims to solve the above and other problems. Another purpose is the exhaust gas for ships that can maximize space efficiency by effectively constructing a flow path in small ships that are obliged to install an exhaust gas purification device in accordance with the strengthened marine environment pollution regulations, but lack the space required for installation. An object of the present invention is to provide a treatment system and an operating method thereof.

According to one aspect of the present invention to achieve the above or other object, the inlet of the gas discharged from the engine of the small ship; first and second flow passages extending from a branch at the end of the inflow passage, one of which has a shorter length than the other; a plurality of exhaust purification devices disposed on the first flow path; an outlet passage extending from the ends of the first and second passages so that the gas that has passed through at least one of the first and second passages passes through and is discharged; and a controller configured to at least control the gas to flow into at least one of the first and second flow paths, wherein the first flow path has a length of the flow path longer than the second flow path, and the gas flows through the second flow path a plurality of detour paths for allowing the gas to flow in a direction different from the flow direction; The gas may have a straight path through which the gas flows in a direction parallel to the flow direction, and the first flow path and the second flow path may share at least a portion of wall surfaces constituting the first and second flow paths.

The first passage may include a first bypass passage extending in a second direction different from a first direction in which the gas flows from the second passage in the branching, and a direction parallel to the first direction in the first bypass passage. a second bypass flow path extending to You can share a wall of 2 euros.

Further comprising a plurality of guide units positioned on the first flow path to guide the flow of the gas passing through the first flow path, at least one of the plurality of guide units, wherein the gas flows in the second flow path A plurality of through-holes located in a region in which the direction is changed so that the gas flowing in a direction different from the direction flows in a direction parallel to the second flow path, and having at least one different density, size, and shape according to a distance from the second flow path may include

The controller may control the gas to flow into any one of the first and second flow passages according to states of the engine and the plurality of exhaust purification devices.

The control unit causes the gas to flow into a second flow path when the engine starts to operate, and when operating conditions including temperatures and pressures of the plurality of exhaust purification devices correspond to preset conditions, the gas flows into the first flow path. , and monitoring the operating condition to control the gas to flow into the second flow path when the preset condition is not met.

In addition, according to an aspect of the present invention to achieve the above or other object, the step of allowing the gas discharged from the engine of the small ship to flow into the second flow path; flowing the gas into a first flow path when operating conditions including temperature and pressure of the plurality of exhaust purification devices disposed therein correspond to preset conditions; and monitoring the operating condition and controlling the gas to flow into the second flow path when the preset condition is not met.

The step of flowing into the first flow path includes: acquiring a current location of the small vessel; checking a reduction target material corresponding to the current location; and purifying the plurality of exhaust gases according to the confirmed reduction target material It may include changing the operation of at least one of the devices.

The effects of the exhaust gas treatment system for ships and the operating method thereof according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, the installation of an exhaust purification device for exhaust gas is mandatory according to the strengthened marine environment pollution regulation, but space efficiency can be improved by effectively configuring a flow path in a small vessel that lacks the space required for installation. The advantage is that it can be maximized.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, it should be understood that the detailed description and specific embodiments such as preferred embodiments of the present invention are given by way of illustration only, since various changes and modifications within the spirit and scope of the present invention may be clearly understood by those skilled in the art.

1 is a view showing the configuration of an exhaust gas treatment system for a ship according to an embodiment of the present invention.
2 and 3 are diagrams illustrating an operation of the exhaust gas treatment system of FIG. 1 .
FIG. 4 is a view showing a perforated plate of the exhaust gas treatment system of FIG. 1 .
5 is a view showing the configuration of an exhaust gas treatment system for a ship according to another embodiment of the present invention.
FIG. 6 is a diagram showing the configuration of the exhaust gas treatment system of FIG. 1 .
FIG. 7 is a flowchart showing the operation of the exhaust gas treatment system of FIG. 1 .

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "part" for components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have distinct meanings or roles by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including ordinal numbers such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprises” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

1 is a view showing the configuration of an exhaust gas treatment system for a ship according to an embodiment of the present invention.

As shown, the exhaust gas treatment system 10 of a ship according to an embodiment of the present invention includes an inflow passage 20 , first and second flow passages 80 and 60 , and a first flow passage 80 . It may include a plurality of exhaust purification devices 88, a first guide unit 92, an outlet passage 40, and a control unit (not shown) disposed in the .

The exhaust gas treatment system 10 may be a treatment device for gas discharged from an engine of a ship. Vessels can be classified according to various criteria. For example, it means that it can be classified according to the size, operation purpose, operation area, etc. including the displacement, tonnage, and length of the ship. A vessel according to an embodiment of the present invention may be a small vessel that is relatively small in size and operated for purposes such as fishing and leisure in coastal areas.

As for the exhaust gas treatment system 10, interest in pollutants discharged from ships is increasing, and the scope and intensity of application are increasing. Even in the case of a small ship according to an embodiment of the present invention, in the past, the installation of the exhaust gas treatment system 10 was excluded or it was a palliative attitude to install only a minimum device, but now the exhaust gas treatment to a certain degree or more for small ships There is a trend that the installation of the system 10 is mandatory.

Small ships are used for simple and maneuverable maritime activities such as fishing and leisure. Due to the size restrictions of small ships, there are significant restrictions on the use of space, so there is a limit in that the space for work, residence, and institutions is provided at a minimum. Therefore, in the case of a small ship, there is considerable difficulty in securing a space for the installation of the exhaust gas treatment system 10 . In particular, in the case of a small ship in operation, the engine room, etc. are allocated space to fit the existing equipment, so it may be practically impossible to secure an additional installation space for the exhaust gas treatment system 10 according to the strengthened regulations. . The exhaust gas treatment system 10 according to an embodiment of the present invention can reduce the space required for the installation of the exhaust gas treatment system 10 by optimizing the configuration of the flow path and effectively remove pollutants. In addition, the exhaust gas treatment system 10 according to an embodiment of the present invention selectively uses the flow path and/or the exhaust gas purification device 88 according to the operating condition of the engine, the operating condition, and the type of material to be reduced. It is possible to improve the performance and lifespan of the gas processing system 10 .

The inlet passage 20 may be an inlet through which gas discharged from the engine flows into the exhaust gas treatment system 10 . In other words, it can be said that the gas generated according to the operation of the engine is transferred to the inflow passage 20 through the pipe.

The first and second flow passages 80 and 60 may extend from a branch at the end of the inflow passage 20, and one of the first and second flow passages may have a shorter length than the other. In other words, it means that the lengths of the first and second flow paths 80 and 60 may be different from each other. The gas introduced into the inflow path 20 may move through the first flow path 80 and/or the second flow path 60 . For example, it means that gas may be moved to the first flow path 80 and/or the second flow path 60 according to a control signal from a controller (not shown). For example, the diverter damper 22 operates according to the control signal, so that the gas introduced into the inflow passage 20 flows into the first flow passage 80 and/or the second flow passage 60 accordingly. means it can be

The first flow path 80 may be a long flow path. In other words, it can be said that the length of the first flow path 80 is longer than that of the second flow path 60 . Although the length of the first flow path 80 is longer than that of the second flow path 60 , the inflow path 20 and the outflow path 40 may be shared. In order to share the inflow path 20 and the outflow path 40 , the first flow path 80 may have a different path from the second flow path 60 . For example, it means that the second flow path 60 having a short length may be configured as a straight flow path, while the first flow path 80 having a long length may be configured as a refracted flow path. For example, the first flow passage 80 includes a first bypass passage 85 branching from the second passage 60 and extending in a direction different from the direction in which gas flows in the second passage 60 , and the first A second bypass flow path 87 extending from the bypass flow path 85 and extending in a direction parallel to the gas flowing direction in the second flow path 60, and a first bypass flow path extending from the second bypass flow path 87 A third bypass passage 89 extending in a direction parallel to the first bypass passage 85 may be included so that gas flows in a direction opposite to a direction in which the gas flows in the pass passage 85 . In this case, the second bypass flow path 87 may share the wall surface 70 with the second flow path 60 . In other words, the long and refracted first flow path 80 may share at least some wall surfaces 70 with the second flow path 60 . The configuration in which the wall surface 70 is shared may mean that the first and second flow paths 80 and 60 are configured to be in close contact with each other. The space occupied by the exhaust gas treatment system 10 can be minimized due to the first and second flow passages 80 and 60 that are in close contact with each other. In the case of a small ship, as described above, a space-efficient exhaust gas treatment system 10 may be required due to a narrow space, so that the utility of the exhaust gas treatment system 10 according to an embodiment of the present invention is high.

A plurality of exhaust purification devices 88 may be disposed in the first flow path 80 . In other words, it means that the exhaust purification device 88 may be disposed on the first flow path 80 having a long flow path. In addition, as described above, since at least some wall surfaces 70 of the first and second flow passages 80 and 60 are shared, the exhaust disposed in the first flow passage 80 is caused by the high-temperature gas flowing in the second flow passage 60 . The temperature of at least a portion of the purification device 88 may be increased in advance. If the temperature of the exhaust purification device 88 is raised in advance, the temperature at which the exhaust purification device 88 normally operates can be reached more quickly. Reaching the normal operating temperature quickly means that the pre-preparation time required for the operation of the exhaust purification device 88 is shortened. This means that, considering the characteristics of a small vessel operated for a relatively short time for fishing or leisure, the effect of operating the exhaust purification device 88 more effectively can be expected.

The exhaust purification device 88 may be disposed on the first flow path 80 to purify the gas. The exhaust purification device 88 may include a Diesel Oxidation Catalyst (DOC) catalyst 82 and an SCR on Filter (SCRF) catalyst 86 .

The DOC catalyst 82 may be disposed on the first bypass passage 85 . In other words, the DOC catalyst 82 may be disposed on the first bypass flow path 85 branched from the second flow path 60 to the first flow path 80 . The DOC catalyst 82 may purify CO, HC, SOF, etc. through an oxidation catalytic reaction, and may oxidize NO to NO ₂ or the like.

The SCRF catalyst 86 may be disposed on the second bypass passage 87 . In other words, it means that the SCRF catalyst 86 may be disposed in a position that shares the second flow path 60 and the wall surface 70 . The reducing agent injection device 81 for injecting urea, etc. in the previous stage of the SCRF catalyst 86, and the burner 83 for decomposing the reducing agent and maintaining the temperature for PM regeneration and the like above a certain level can be operated. Since the SCRF catalyst 86 shares the second flow path 60 and the wall surface 70 and can be heated, the effect of minimizing the operation of the burner 83 can be expected.

At least one first guide unit 92 may be disposed to guide the flow of gas passing through the first flow path 80 . In other words, it means that the first guide unit 92 guides the gas to smoothly flow inside the refracted first flow path 80 .

The first guide unit 92 is located in a region in which the direction is changed so that the gas flowing in a direction different from the direction in which the gas flows in the second flow path 60 flows in a direction parallel to the second flow path 60, but the second flow path ( 60) and may include a plurality of through-holes (95 of FIG. 4 ) having different at least one of density, size, and shape according to the distance. In other words, the first guide unit 92 is branched from the second flow path 60 through which the gas flows in the z direction, and passes through the first bypass flow path 85 for allowing the gas to flow in the x direction. This means that it may be located at the beginning of the second bypass flow path 87 flowing in the z-direction again. The first guide unit 92 includes a plurality of through-holes (95 in FIG. 4 ) to guide the gas to flow smoothly despite the change in direction. Specific details of the plurality of through-holes (95 in FIG. 4 ) provided on the first guide unit 92 will be described in the corresponding part.

The outlet passage 40 may induce the branched first and second flow passages 80 and 60 to rejoin to discharge the gas. In other words, the outlet passage 40 may be an end region of the exhaust gas treatment system 10 .

The controller (not shown) may control the gas to flow into at least one of the first and second flow paths 80 and 60 . For example, it is possible to control the flow of gas by controlling the operation of the diverter damper 22 and/or the louver damper 24 located on the outflow passage 40 side located on the inflow passage 20 side. means The control operation of the controller (not shown) will be described in more detail in the corresponding part.

2 and 3 are diagrams illustrating an operation of the exhaust gas treatment system of FIG. 1 .

As shown in these drawings, the exhaust gas treatment system 10 according to an embodiment of the present invention transmits the gas (G) discharged from the engine according to the control signal to the first flow path 80 and the second flow path 60 . Any one of them can be selectively induced.

As shown in FIG. 2 , the gas G may flow along the second flow path 60 .

The gas G may be introduced into the exhaust gas treatment system 10 through the inflow path 20 .

A control unit (not shown) may control the operation of the diverter damper 22 so that the gas G flows along the second flow path 60 . For example, when the exhaust gas treatment system 10 is not ready to purify the contaminants contained in the gas, the gas G may flow along the second flow path 60 .

The second flow path 60 may be configured in a straight line from the inflow path 20 to the outflow path 40 . In other words, the second flow path 60 may be a straight path through which the gas G flows from the inflow path 20 to the outlet path 40 in parallel. Since the second flow path 60 is configured as a straight path, the gas G may be smoothly discharged to the outside under low resistance.

As shown in FIG. 3 , the gas G may flow along the first flow path 80 .

The diverter damper 22 may guide the gas G toward the first flow path 80 by operation control of a controller (not shown). That is, it means that the gas G flows in the direction of the first bypass passage 85 . The first bypass flow path 85 may be different from the direction of the gas G flowing through the second flow path 60 . In other words, the direction of the gas G flowing through the first bypass flow path 85 may be perpendicular to the direction of the gas G flowing through the first flow path 80 by the diverter damper 22 . means there is

The DOC catalyst 82 of the exhaust purification device 88 may be positioned at the inlet of the first bypass flow path 85 . A reducing agent injection device 81 and a burner 83 may be located inside the first bypass passage 85 .

The gas G introduced into the first bypass passage 85 may pass through the first guide unit 92 and enter the second bypass passage 87 . A plurality of through holes (95 in FIG. 4 ) may be formed in the first guide unit 92 .

When entering the second bypass flow path 87 through the first guide unit 92 , the gas G may flow in the second flow path 60 in a direction parallel to the flow of the gas G. That is, it means that the gas (G) flowing in the x-direction flows in the z-direction, and the first guide unit 92 can guide the flow of the gas (G) to be smoothly changed.

The gas G that has passed through the first guide unit 92 may pass through the SCRF catalyst 86 of the exhaust purification device 88 . The SCRF catalyst 86 is a soot filtration filter coated with an SCR catalyst, which will be described in detail in the corresponding section.

The gas G passing through the SCRF catalyst 86 may enter the third bypass passage 89 . The direction of the gas G may be switched from the z direction to the -x direction in the third bypass flow path 89 . A louver damper 24 may be positioned at the rear end of the third bypass flow path 89 . The louver damper 24 can be selectively opened or closed according to a control signal of a control unit (not shown) so that the purified gas G flows into the first flow path 80 and then smoothly flows out in the outflow path 40 direction. have. The louver damper 24 may be selectively closed or opened so that the gas G flowing through the second flow path 60 does not flow back into the first flow path 80 .

The gas G may pass through the first flow path 80 and contaminants may be removed. The control unit (not shown) may selectively remove the material to be reduced. For example, when operating an emission control reinforced area determined by law, in addition to the PM removal operation, urea water is injected through the reducing agent injection device 81 to perform the NOx removal operation, and when operating the emission control area means that only the PM removal operation can be performed. Through the operation of selectively removing substances to be reduced, effective pollutant removal such as extending the life of the system while satisfying emission regulations may be possible.

FIG. 4 is a view showing a perforated plate of the exhaust gas treatment system of FIG. 1 .

As shown here, a plurality of through-holes 95 may be formed in the first guide unit 92 according to an embodiment of the present invention. The through hole 95 may be configured such that the flow of the gas G is optimized.

As shown in (a) of FIG. 4 , a plurality of through holes 95 may be arranged at regular intervals in the plate-shaped first guide unit 92 . The through-holes 95 may have the same size and shape. The through hole 95 of this type can allow the gas G to flow from the first bypass passage (85 in FIG. 3) to the second bypass passage (87 in FIG. 3) uniformly over the entire area. have.

As shown in (b) of FIG. 4 , the through-holes 95 may have different densities. For example, it means that the density of the through-holes 95 per unit area may be increased according to an increase in the x-direction distance, which is the distance to the second flow path (60 in FIG. 3 ). In the through hole 95 of this type, even when the gas (G) introduced into the first bypass flow path (85 in FIG. 3) moves in the x direction and the pressure is gradually lowered, the gas (G) can make it flow. That is, the portion close to the second flow path (60 in FIG. 3) has a high pressure of the gas (G) and the portion far from the flow path (60 in FIG. 3) has a low pressure of the gas (G). It means that it can flow uniformly as a whole by varying the density of When the gas G flows uniformly as a whole, the gas G can be uniformly input to the SCRF catalyst (86 in FIG. 3 ). Therefore, the SCRF catalyst (86 in FIG. 3 ) can be consumed uniformly as a whole, and as a result, the lifespan can be extended. Such a point can be easily understood when it is assumed that the gas (G) is excessively concentrated only at a specific point and the lifespan is shortened.

As shown in (c) of FIG. 4 , the through-holes 95 may have different sizes. For example, it means that the size of the through hole 95 may increase as the x-direction distance increases. By making the size of the through hole 95 increase as the distance in the X direction increases, it is possible to induce a uniform flow as a whole regardless of the pressure drop of the gas G.

As shown in (d) of Figure 4, the shape of the through hole 95 may be arranged differently. For example, it means that the through hole 95 may change from a circular shape to an elliptical shape as the x-direction distance is increased. When it changes from a circular shape to an oval shape, the amount of gas (G) passing through can be increased. In addition, by arranging the elliptical through-holes 95 in the horizontal, vertical and/or diagonal directions, the flow of the gas G can be guided in a desired direction.

5 is a view showing the configuration of an exhaust gas treatment system for a ship according to another embodiment of the present invention.

As shown here, the exhaust gas treatment system 10 for a ship according to another embodiment of the present invention may include at least one of the second to fifth guide units 95, 99, 94, 96.

The second guide unit 95 may be provided in the first bypass passage 85 . The second guide unit 95 may be a vane for changing the flow of the gas (G). The second guide unit 95 may be a curved plate disposed so that the gas (G) flow in the x-direction is changed to the gas (G) flow in the z-direction. A plurality of second guide units 95 may be disposed like the second guide units 95a to 95e 2a to 2e. Due to the second guide unit 95, the moving direction of the gas (G) can be changed more smoothly.

The third guide unit 99 may be provided in the third bypass passage 89 . The third guide unit 99 may be a curved plate arranged to change the gas (G) flow in the z-direction in the -x direction.

The fourth and fifth guide units 94 and 96 may be wall surfaces forming the round-treated first flow path 80 . The round-processed fourth and fourth guide units 94 and 96 may facilitate the flow of the gas (G).

FIG. 6 is a diagram showing the configuration of the exhaust gas treatment system of FIG. 1 .

As shown herein, the SCRF catalyst 86 may be configured for increased space utilization and/or efficiency.

As shown in FIGS. 6A and 6B , the SCRF catalyst 86 may include a plurality of partitioned catalyst modules 98 . For example, it means that it may be in a form including the catalyst module 98 divided into 4 or 9 divisions. When the catalyst module 98 is divided, the contaminated and/or damaged catalyst module 98 can be selectively exchanged through post-operation inspection. Therefore, it may be possible to operate more economically than if the whole must be replaced due to some contamination and/or damage.

As shown in (c) and (d) of FIG. 6 , a DPF filter 97 may be included in the partitioned SCRF catalyst 86 . For example, the traveling direction of the gas (G) is to arrange the DPF filter 97 in a direction perpendicular to the z-direction, or to selectively arrange the DPF filter 97 in a necessary part of the flow of the gas (G). means By modularizing the SCRF catalyst 86 and the DPF filter 97 and configuring them as one, the space required for installation can be reduced compared to the case of configuring them separately. In addition, it is possible to secure economic feasibility by selectively exchanging the contaminated part.

FIG. 7 is a flowchart showing the operation of the exhaust gas treatment system of FIG. 1 .

As shown in this figure, the exhaust gas treatment system according to an embodiment of the present invention may perform an exhaust gas purification control operation according to the current state of the ship.

A step (S10) in which the engine of the small ship is operated may be performed.

A step S20 in which the second flow path 60 is selected may be performed. In the initial stage in which the stopped engine operates, the exhaust purification device 88 may not operate normally. For example, a certain temperature or more may be maintained for PM removal and/or NOx removal, but the temperature required for operation may not be reached at the initial stage of engine operation. If the gas G is sent to the exhaust purification device 88 in a state where the temperature required for operation is not reached, the pollution purification efficiency may be reduced and/or the lifespan of the equipment may be shortened. Therefore, in the initial stage of engine start-up, the controller (not shown) may control the gas G to flow into the second flow path 60 .

A step (S30) of checking the operating conditions and a step (S40) of selecting a flow path may be performed accordingly.

The operating condition may mean the state of the exhaust gas treatment system 10 . For example, it means that it is possible to check whether a normal operation is possible by sensing temperature, pressure, and pollution through sensors disposed in each part of the exhaust purification device 88 .

If the conditions for the exhaust purification apparatus 88 to operate normally are not met due to the operating conditions or the area where the small ship is located is not an area requiring exhaust gas purification, the step S50 of selecting the second flow path may be performed.

If it is necessary to use the exhaust purification device 88 by checking the operating conditions, the step of selecting the first flow path ( S60 ) may be performed.

A step (S70) of confirming the reduction target material may be performed. The material to be reduced may be different depending on the location of the small vessel. In other words, it means that the emission standards for specific pollutants may be strengthened or weakened in certain areas according to laws and regulations. For example, in a specific area, the removal of PM may be sufficient, and in another specific area, there may be an area in which the removal of NOx is additionally required. The control unit may determine whether the current position of the small vessel by acquiring the position of the small vessel by GPS or the like corresponds to the emission standards strengthened or weakened according to laws and regulations.

A step (S80) of performing a control operation corresponding to the material to be reduced may be performed. For example, the control unit may perform an operation of not spraying urea water in an area where regulations can be complied with even if only PM is removed, and may perform an operation of spraying urea water in an area where NOx needs to be removed. By selectively operating according to conditions, it is possible to reduce operating costs and extend the life of the device.

The above detailed description should not be construed as restrictive in all respects and should be considered as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

10: exhaust gas treatment system 20: inflow path
40: outflow path 60: second euro
80: 1st Euro

Claims (7)

an inlet passage for gas discharged from the engine of a small vessel;
first and second flow passages extending from a branch at the end of the inflow passage, one of which has a shorter length than the other;
a plurality of exhaust purification devices disposed on the first flow path;
an outlet passage extending from the ends of the first and second passages so that the gas that has passed through at least one of the first and second passages passes through and is discharged;
a louver damper positioned at the end of the first flow path so that the gas flowing through the second flow path does not flow back into the first flow path; and
A control unit for controlling the gas to flow into at least one of the first and second flow paths,
The first flow path is
The length of the flow path is longer than that of the second flow path and includes a plurality of detour paths through which the gas flows in a direction different from that in which the gas flows in the second flow path,
The second flow path,
The length of the flow path is shorter than that of the first flow path, and has a straight path through which the gas flows in a direction parallel to the flow direction in the inflow path and the outlet path,
The first flow path and the second flow path are
Shares at least a portion of the walls constituting the first and second flow paths,
At least one of a plurality of guide units positioned on the first flow path to guide the flow of the gas passing through the first flow path,
It is located at the beginning of the first flow path, and is located in a region in which the direction of the gas flowing in a direction different from the direction in which the gas flows in the second flow path is changed to flow in a direction parallel to the second flow path, but with the second flow path and The exhaust gas treatment system for ships which is a first guide unit including a plurality of through-holes having different at least one of density, size, and shape according to the distance of the . The method of claim 1,
The first flow path is
a first bypass passage extending in a second direction different from the first direction in which the gas flows from the second passage in the branch;
a second bypass passage extending from the first bypass passage in a direction parallel to the first direction;
and a third bypass passage extending in a direction parallel to the first bypass passage from the second bypass passage,
The wall surface of the second bypass flow passage shares the wall surface of the second flow passage. delete The method of claim 1,
The control unit is
A marine exhaust gas treatment system for controlling the gas to flow into any one of the first and second flow passages according to the state of the engine and the plurality of exhaust purification devices. 5. The method of claim 4,
The control unit is
When the engine starts to operate, the gas flows into a second flow path,
When the operating conditions including the temperature and pressure of the plurality of exhaust purification devices correspond to preset conditions, the gas flows into the first flow path;
A marine exhaust gas treatment system for monitoring the operating condition and controlling the gas to flow into the second flow path when the preset condition is not met. allowing the gas discharged from the engine of the small ship to flow into the second flow path;
flowing the gas into a first flow path when operating conditions including temperature and pressure of a plurality of exhaust purification devices disposed therein correspond to preset conditions; and
monitoring the operating condition and controlling the gas to flow into the second flow path if it does not correspond to the preset condition,
Further comprising a louver damper located at the end of the first flow path so that the gas flowing through the second flow path does not flow back into the first flow path,
The first flow path has a length of the flow path longer than that of the second flow path, and includes a plurality of detour paths through which the gas flows in a direction different from that in which the gas flows in the second flow path,
The second flow path has a length of the flow path shorter than that of the first flow path, and the gas passing through at least one of the inflow path and the first and second flow paths of the gas discharged from the engine passes through the second flow path to be discharged. 1 and 2 have a straight path through which the gas flows in a direction parallel to the flowing direction in the extended outflow path joined at the ends of the flow paths,
The first flow path and the second flow path are
sharing at least a portion of the wall surfaces constituting the first and second flow paths;
At least one of a plurality of guide units positioned on the first flow path to guide the flow of the gas passing through the first flow path,
It is located at the beginning of the first flow path, and is located in an area in which the direction of the gas flowing in a direction different from the direction in which the gas flows in the second flow path is changed to flow in a direction parallel to the second flow path, but with the second flow path and A method of operating a marine exhaust gas treatment system, which is a first guide unit including a plurality of through-holes having different at least one of density, size, and shape according to the distance of the . 7. The method of claim 6,
The step of flowing into the first flow path comprises:
obtaining the current location of the small ship;
checking the target material to be reduced corresponding to the current location;
and changing the operation of at least one of the plurality of exhaust purification apparatuses according to the checked reduction target material.

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