JP6397526B2 - Ship exhaust purification system and ship - Google Patents

Description

  The present invention relates to an exhaust purification system mounted on a ship for removing pollutants in exhaust gas, and a ship to which the exhaust purification system is applied.

  Heavy oil or the like used as fuel in ships usually contains sulfur, and the sulfur is discharged from the ship as exhaust gas. In recent years, severe restrictions have been imposed on this sulfur content from the viewpoint of environmental considerations. As a measure for clearing this restriction, a low-sulfur fuel having a low sulfur content can be used as the fuel, but the low-sulfur fuel that has undergone the desulfurization process is expensive. Therefore, instead of using low-sulfur fuel, it has also been proposed to suppress the amount of sulfur content below the regulation value by installing an exhaust purification device that removes the sulfur content in the exhaust gas in the exhaust gas flow path. ing.

  This type of exhaust emission control device is a mechanism that, for example, injects a solvent such as water to exhaust gas to wash away sulfur in the exhaust gas, and is called a scrubber or the like. For example, water as a solvent is pumped up from a sea chest using a pump, injected into an exhaust passage through which exhaust gas such as an engine circulates, and sulfur content is dissolved and discharged out of the ship. Some products are neutralized by adding alkaline chemicals to wastewater in which sulfur is dissolved.

  Moreover, the same exhaust gas purification device can be used not only for the sulfur content described above but also for the purpose of removing, for example, PM (Particulate Matter) and the like.

  As a document describing the technology related to the exhaust emission control device mounted on a ship as described above, there is the following Patent Document 1 or the like.

JP, 2006-168574, A

  By the way, when such an exhaust purification device is to be mounted on a ship, it is desirable that the installation position of the exhaust purification device is downstream of the flow path of exhaust gas discharged from an engine or the like. In order to efficiently guide the exhaust gas to the exhaust port provided in the chimney above the hull, it is necessary to keep the pressure of the exhaust gas as high as possible downstream of the flow path, but the pressure loss due to the exhaust gas passing through the exhaust purification device Therefore, it is better to install the exhaust purification device on the downstream side.

  Moreover, in a ship, water is heated and steam is generated and used in various places. Steam is generated by an economizer provided in a flow path of exhaust gas discharged from the engine in addition to the boiler. This economizer is a device that heats water by the heat of exhaust gas, but is generally provided upstream of the exhaust gas flow path in order to recover heat as efficiently as possible. Here, in the scrubber type exhaust purification device, since the solvent is injected into the exhaust gas, the temperature of the exhaust gas that has passed through the exhaust purification device falls. For this reason, there is also a circumstance that the upstream side of the economizer is not very suitable as the installation position of the exhaust purification device.

  For the above reasons, the exhaust emission control device is provided in the vicinity of the exhaust port of the chimney, which is at a high position in the ship. Here, if water is to be pumped from the sea chest near the ship bottom to the exhaust gas purification device, the height difference of the flow path for carrying the water is large, and a pump having a large head is required. Installation of a large-capacity pump requires a suitable space, and the size of the space occupied by the filter and piping associated with the pump cannot be ignored. Thus, if an exhaust purification apparatus as described above is to be installed in a ship, the space in the lower part of the ship will be greatly broken, which may lead to pressure on the load.

  In view of such a situation, the present invention intends to provide a ship exhaust purification system and a ship capable of suppressing a space related to the installation of a pump when installing an exhaust purification apparatus.

The present invention is provided in an exhaust passage through which exhaust gas discharged from a ship flows, an exhaust purification device that injects water as a solvent into the exhaust gas, a pump that draws water from a sea chest, and the pump from the pump A solvent supply flow path for introducing water as a solvent to the exhaust purification apparatus, an inlet side flow path for drawing water from the sea chest, and an outlet side flow path for discharging water out of the ship are discharged from the exhaust purification apparatus. The solvent discharge flow path through which the water is circulated merges with the outlet-side flow path, and the pump is installed in the ship for purposes other than guiding water as a solvent to the exhaust purification device. It relates to an exhaust purification system.

  The exhaust purification system for a ship according to the present invention includes a cooling system that cools a cooling target device installed in the ship with water, an inlet-side flow path from a sea chest to the cooling system, and water that has passed through the cooling system. An outlet-side flow path that discharges to the outside, and a cooling water pump that is arranged in the inlet-side flow path and that feeds water pumped up from the sea chest into the cooling system as a refrigerant, and uses the cooling water pump as the pump And it can comprise so that the water pumped up by this cooling water pump may be sent into the said exhaust gas purification device via the said solvent supply flow path.

In the exhaust purification system for a ship according to the present invention, it is preferable that the solvent supply flow path is configured to guide the water flowing through the outlet-side flow path to the exhaust purification apparatus as a solvent.

  In the exhaust purification system for a ship of the present invention, the solvent supply channel branches from the outlet side channel and extends to the exhaust purification device, and a branch point to the solvent supply channel in the outlet side channel Is preferably provided with a three-way valve.

  In the ship exhaust purification system of the present invention, a ballast pump can be used as the pump.

  In the exhaust gas purification system for a ship according to the present invention, a booster pump for supplementing the head of the pump can be provided in the middle of the solvent supply channel.

  The ship exhaust purification system of the present invention includes a sub pump for pumping water from a sea chest in addition to the pump, and feeds water from the sub pump to the flow path from the pump to the solvent supply flow path through the sub flow path. It can be configured as follows.

  In the exhaust purification system for a ship according to the present invention, a pump installed in a ship having a purpose other than feeding water to the flow path from the pump to the solvent supply flow path can be used as the sub pump. .

  The present invention also relates to a ship equipped with the above-described ship exhaust purification system.

  According to the ship exhaust gas purification system and the ship of the present invention, when installing the exhaust gas purification apparatus, it is possible to achieve an excellent effect that a space related to the installation of the pump can be suppressed.

1 is a schematic diagram illustrating an example of a ship exhaust purification system and a ship form according to an embodiment of the present invention. It is a schematic diagram showing a ship exhaust purification system and a ship form according to a reference example of the present invention. It is a schematic diagram which shows another example of the exhaust emission purification system of the ship by implementation of this invention, and the form of a ship.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows an example of a ship exhaust purification system and a ship form according to an embodiment of the present invention. The engine room behind the ship 1 is provided with various devices (not shown) in addition to the engine 2 and the generator 3. Some of these apparatuses require cooling (hereinafter referred to as “cooling target devices”), and a cooling system 4 is provided to cool these cooling target devices.

  The cooling system 4 is piping arranged between the devices to be cooled so as to be in contact with, for example, a radiator of the engine 2. The cooling system 4 cools the engine 2 and the generator 3 by introducing water W as a refrigerant into the piping. Heat exchange with the target device is performed to cool the cooling target device. Water W drawn by a pump (cooling water pump) 6 from a sea chest 5 provided near the ship bottom is sent to the cooling system 4 through an inlet-side flow path 7. The water W exchanges heat with the device to be cooled while passing through the cooling system 4 and flows to the outlet-side flow path 8 on the downstream side.

  On the other hand, the engine 2 and the generator 3 burn fuel such as heavy oil to generate thermal energy, and the exhaust gas G generated by the combustion passes through the exhaust passage 9 connected to the engine 2 and the generator 3. Then, it is guided upward in the ship and discharged from an exhaust port 9 a provided in the chimney 10. In the middle of the exhaust passage 9, an economizer 11 is provided on the upstream side to produce steam using the heat of the exhaust gas G, and a scrubber 12 as an exhaust purification device is located near the exhaust port 9 a on the downstream side. It is provided and the sulfur content etc. which are contained in the exhaust gas G are removed. The scrubber 12 injects water W pumped from the outside of the ship into the exhaust passage 9 as a solvent, captures substances such as sulfur contained in the exhaust gas G flowing through the exhaust passage 9 with the water W, and exhausts the water. This is a mechanism for purifying the gas G.

  In addition to the above-described economizer 11, the boiler 21 is provided as a device for generating steam. When the amount of steam generated is insufficient, the boiler 21 burns fuel to compensate for the amount of steam. The exhaust gas G generated in the boiler 21 is sent from the exhaust passage 22 to the scrubber 12 for processing, as is the exhaust gas G from the engine 2 and the generator 3. Note that it is possible to exclusively use low-sulfur fuel in the boiler 21, and in that case, the exhaust gas G discharged from the boiler 21 can be discharged outside the ship without being processed in the scrubber 12.

  In the case of the first embodiment, the solvent used in the scrubber 12 is characterized in that the water W pumped up as a refrigerant by the cooling water pump 6 and passes through the cooling system 4 is diverted.

  That is, in the first embodiment, the outlet side flow path 8 on the outlet side of the cooling system 4 is branched to the solvent supply flow path 13, and the water W flowing through the outlet side flow path 8 is passed through the solvent supply flow path 13. It leads to the scrubber 12. A three-way valve 14 is provided at a branch point from the outlet side channel 8 to the solvent supply channel 13, and a channel downstream from the branch point is defined between the outlet side channel 8 and the solvent supply channel 13. It can be switched. Further, the three-way valve 14 is configured to be able to adjust the opening degree so that the flow rate of the water W flowing from the upstream outlet side flow path 8 to the solvent supply flow path 13 can be adjusted.

  A booster pump 15 is provided in the middle of the solvent supply flow path 13 to pump water W flowing from the outlet side flow path 8 to the solvent supply flow path 13 to the scrubber 12.

  The water W that has captured the sulfur content in the exhaust gas G by the scrubber 12 is sent downstream through the solvent discharge channel 16. The solvent discharge channel 16 merges with the outlet side channel 8 on the downstream side. The joining position is a branch point from the outlet side flow path 8 to the solvent supply flow path 13, that is, downstream of the installation position of the three-way valve 14. The downstream side of the outlet side flow path 8 leads to the outside of the ship through a discharge port 8a, and the water W pumped up from the cooling water pump 6 passes through the outlet side flow path 8, the solvent supply flow path 13, and the solvent discharge flow path 16. After flowing, it is finally discharged out of the ship from the discharge port 8a.

  The operation of the cooling water pump 6 and the booster pump 15 is controlled by output signals 6 a and 15 a from the control device 17. The switching and opening of the three-way valve 14 is controlled by an opening signal 14a input from the control device 17. The control device 17 is a device that controls various devices related to the operation of the ship 1, and the control signals 2 a, 3 a, and so on from the control device 17 for the engine 2, the generator 3, the economizer 11, the scrubber 12, and the boiler 21. It is controlled by the input of 11a, 12a, 21a.

  Next, the operation of the first embodiment will be described.

  As described above, the cooling target devices such as the engine 2 and the generator 3 are cooled by the water W that is pumped up by the cooling water pump 6 and sent to the cooling system 4. On the other hand, the exhaust gas G discharged along with the operation of the engine 2, the generator 3, and the boiler 21 is sent to the exhaust passage 9 and processed by the scrubber 12. In the scrubber 12, water W is used as a solvent for the treatment of the exhaust gas G. The water W used here is water guided from the outlet side flow path 8 downstream of the cooling system 4 through the solvent supply flow path 13. W.

  That is, by operating the three-way valve 14 to flow at least a part of the water W flowing through the outlet side flow path 8 to the solvent supply flow path 13 side, the booster pump 15 is operated and the scrubber 12 installed above the hull. I am trying to guide you through. At this time, the amount of water W necessary for purifying the exhaust gas G in the scrubber 12 depends on the amount of the exhaust gas G, that is, the operating conditions of the power unit such as the engine 2, the generator 3, and the boiler 21. It depends on the quality of the fuel. Therefore, the control device 17 derives the necessary amount of water W from the operating conditions of the engine 2, the generator 3, and the boiler 21 and other conditions, and the cooling water pump 6 and the booster pump 15 according to the amount of the water W. Control the output. In deriving the necessary amount of water W, for example, a map storing an appropriate amount of water W according to each condition is stored in the control device 17 in advance, and the map is called and referred to. It ’s fine. At this time, since the opening degree of the three-way valve 14 is configured to be adjustable as described above, the opening degree of the three-way valve 14 may be adjusted in accordance with the flow rate of the water W pumped up by the booster pump 15.

  If the solvent supply flow path 13 is configured in this way, when the water W required as a solvent is guided to the scrubber 12, the position where the water W is drawn is not the sea chest 5 near the ship bottom but the outlet side of the cooling system 4. That is, the difference in level of pumping up the water W is not the distance from the sea chest 5 to the scrubber 12 but the distance from the outlet side of the cooling system 4 to the scrubber 12. Accordingly, when the booster pump 15 is installed, the head of the booster pump 15 only needs to compensate for the head that is insufficient when water W is pumped up to the scrubber 12 only by the cooling water pump 6. Can be kept small.

  That is, as shown in FIG. 2 as a reference example, when the scrubber 12 is installed, when the water W is pumped from the sea chest 5 near the ship bottom to the scrubber 12 using the pump (solvent pump) 18, As a result of the difference in height, the solvent pump 18 is required to have a large head, the solvent pump 18 becomes large, and a large space is required for installation. Moreover, in the reference example, the solvent pump 18 is installed in the vicinity of the ship bottom. However, this is an area where various devices other than the solvent pump 18 are installed and generally there is not much room for space. In the first embodiment, the booster pump 15 can be installed in an area with a relatively large space above the bottom of the ship. Therefore, particularly when the existing ship 1 is modified and the scrubber 12 is installed, the installation space is reduced. It is relatively easy to secure.

  In the first embodiment, when the water W is pumped up to the scrubber 12, the solvent supply channel 13 is branched from the outlet side channel 8, and the solvent discharge channel 16 is joined to the outlet side channel 8. ing. That is, a part of the flow path for circulating the water W as the refrigerant is also used as a flow path (the sea chest 5, the inlet side flow path 7, and the outlet side flow path 8) for flowing the water W as the cooling water. As a result, it is possible to reduce the space and material costs for installing the pipe.

  In this regard, in the case of the reference example shown in FIG. 2, it is necessary to install a new sea chest 5, and the length of the solvent supply flow path 13 required when the scrubber 12 is installed is the first embodiment. Longer than that. The scrubber 12 requires a large amount of water W as a solvent depending on the amount of the exhaust gas G, and the solvent supply channel 13 needs to have a larger diameter accordingly. The size of cannot be ignored. In particular, when the scrubber 12 is installed in the existing ship 1, if the flow path configuration as in the first embodiment is adopted, it can lead to significant savings in space and cost.

  Further, at this time, in the first embodiment, the solvent supply channel 13 is branched from the outlet side channel 8 on the outlet side instead of the inlet side channel 7 which is the inlet side of the cooling system 4. This considers the influence on the cooling function in the cooling system 4. That is, if a part of the water W pumped up by the cooling water pump 6 is extracted from the inlet-side flow path 7 and led to the scrubber 12, the pressure of the water W on the inlet side of the cooling system 4 is reduced. Is difficult to prevent. As a result, there is a possibility that a sufficient amount of water W does not flow into the cooling system 4 and cooling of the cooling target devices such as the engine 2 and the generator 3 in the cooling system 4 is partially insufficient. Therefore, if the water W is led from the outlet side of the cooling system 4 to the solvent supply channel 13 as in the first embodiment, the inlet side of the cooling system 4 is introduced by introducing the water W into the solvent supply channel 13. It is possible to avoid a decrease in pressure.

  When the water W has sufficient pressure on the outlet side of the cooling system 4 to guide the water W to the scrubber 12, that is, the cooling water pump 6 passes the water W through the cooling system 4 to the scrubber 12. In the case where a lift that can be guided is provided, the booster pump 15 is not necessarily installed. In other words, when the scrubber 12 is installed in the ship 1, a pump having a head larger than the head necessary for supplying the coolant W to the cooling system 4 is installed as the cooling water pump 6. The booster pump 15 can be replaced with an installation.

  Furthermore, in the first embodiment, the entire amount of water W that has passed through the cooling system 4 is not always led to the scrubber 12, but the solvent supply channel 13 is branched from the outlet side channel 8. When it is not necessary to use the water W, the entire amount of the water W that has passed through the cooling system 4 can be discharged from the outlet-side flow path 8 to the outside of the ship without passing through the solvent supply flow path 13 and the solvent discharge flow path 16. It has become. This is because it is assumed that the scrubber 12 is not used in the operation of the ship 1.

  That is, for example, when the ship 1 enters a sea area or the like where the discharge of sulfur or the like into the water is restricted, the low-sulfur fuel is used in the engine 2, the generator 3, and the boiler 21, and the scrubber 12 is used. It is necessary to stop and prevent the sulfur content from being discharged outside the ship. At this time, if the solvent supply channel 13 is not branched from the outlet channel 8 and the outlet channel 8 is connected to the scrubber 12 as it is, in other words, the solvent channel is supplied to the outlet channel 8 as it is. When configured as the flow path 13, the entire amount of water W flowing through the cooling system 4 is always guided to the scrubber 12, and the water W is constantly pumped up to the scrubber 12 regardless of whether the scrubber 12 is on or off. That is, the booster pump 15 is driven wastefully, which is not preferable from the viewpoint of energy saving. In addition, even if the booster pump 15 is not installed and the supply of the water W to the scrubber 12 is covered only by the head of the cooling water pump 6, the water from the outlet side of the cooling system 4 to the height of the scrubber 12 is used. The power to pump up W is wasted. Therefore, as in the first embodiment, while the scrubber 12 is stopped, the water W is discharged directly from the cooling system 4 to the outside of the ship without supplying the water W to the scrubber 12, and the booster pump 15 is stopped or If the output of the cooling water pump 6 is reduced, the power consumption can be reduced and the operation cost can be reduced.

  Here, in the first embodiment, water W pumped up as a refrigerant by the cooling water pump 6 is used as a solvent used in the scrubber 12, but other pumps such as an emergency fire pump, ballast pump, cargo condenser pump, etc. It is also possible to use various pumps provided in the ship for pumping up water W as a solvent, and even in such a case, when installing the scrubber 12, the space and cost for installing the pump and piping are reduced. You can save. That is, the first feature of the present invention is to use the pump installed in the ship 1 with or without the installation of the scrubber 12 for the purpose of guiding the water W as the solvent to the scrubber 12. Regardless of the type of pump that has a purpose other than the purpose and is installed in the ship 1, by using the pump as the pump 6 for the purpose, the same effects as the present embodiment can be obtained. Can do it.

  However, since the cooling water pump 6 is basically always operating during the operation of the ship 1, the pumped water W can always be used as the solvent of the scrubber 12, so that the present invention is implemented. Is particularly suitable. If, for example, a configuration in which water W is pumped from the ballast pump and led to the scrubber 12 is adopted, the ballast pump that is not normally operated must be continuously operated for the operation of the scrubber 12. This is because additional energy is required. Further, depending on the flow path configuration, it may be assumed that the water W cannot be temporarily supplied to the scrubber 12 while the ballast pump is used for its original purpose.

  As described above, in the first embodiment, the exhaust gas purification apparatus (in which the exhaust gas G discharged from the ship 1 circulates) and the water W as the solvent is injected into the exhaust gas G ( A scrubber) 12, a pump (cooling water pump) 6 for drawing water from the sea chest 5, and a solvent supply passage 13 for leading water W as a solvent from the pump 6 to the exhaust gas purification device 12, Since it is installed in the ship 1 with a purpose other than introducing the water W as a solvent to the exhaust gas purification device 12, it is possible to reduce the space and cost for installing the pump and piping when installing the scrubber 12.

  In the first embodiment, a cooling system 4 that cools a cooling target device (engine 2, generator 3) installed in the ship 1 with water W, and an inlet-side flow path from the sea chest 5 to the cooling system 4. 7, an outlet side channel 8 that discharges the water W that has passed through the cooling system 4 to the outside of the ship, and a cooling system that sends the water W pumped up from the sea chest 5 to the cooling system 4 as a refrigerant. And a water pump 6. The cooling water pump 6 is used as the pump, and the water W pumped up by the cooling water pump 6 is sent to the exhaust purification device 12 through the solvent supply channel 13. . Since the cooling water pump 6 is basically always operating during operation of the ship 1, the pumped water W can always be diverted to the scrubber 12, and is particularly suitable for the implementation of the present invention.

  In the first embodiment, the solvent supply channel 13 is configured to guide the water W that has passed through the cooling system 4 to the exhaust gas purification device 12 as a solvent. It is possible to avoid a situation where the pressure on the inlet side of the cooling system 4 decreases due to the introduction.

  Further, in the first embodiment, the solvent supply channel 13 branches from the outlet side channel 8 and extends to the exhaust gas purification device 12, and at the branch point to the solvent supply channel 13 in the outlet side channel 8. Since the three-way valve 14 is provided, when the scrubber 12 is stopped, the water W is discharged from the cooling system 4 directly to the outside of the ship without supplying the water W to the scrubber 12, thereby consuming electric power. Can be saved and driving costs can be reduced.

  In the first embodiment, the solvent discharge channel 16 through which the water W discharged from the exhaust purification device 12 flows joins the outlet side channel 8 downstream of the three-way valve 14 in the outlet side channel 8. Therefore, a part of the flow path for circulating the water W as the refrigerant is also used as the flow path for circulating the water W as the cooling water, thereby reducing the space and material cost for installing the piping. it can.

  In the first embodiment, the booster pump 15 that compensates the head of the pump 6 is provided in the middle of the solvent supply flow path 13, so that the water W as a solvent can be reliably pumped up to the scrubber 12.

  Therefore, according to the first embodiment, the space for installing the pump can be reduced when installing the exhaust purification device.

  FIG. 3 shows another example of a ship exhaust purification system and a ship form according to the present invention. In the case of the second embodiment, the configuration in which the solvent supply passage 13 is branched from the outlet-side passage 8 downstream of the cooling system 4 and the water W is guided to the scrubber 12 is the first embodiment (see FIG. 1). However, the head for pumping up the water W as a solvent to the scrubber 12 is installed near the bottom of the ship instead of the booster pump 15 provided in the middle of the solvent supply channel 13 as in the first embodiment. The sub pump 19 compensates for this. The water W pumped up from the sea chest 5 by the sub pump 19 is supplied to the upstream side of the three-way valve 14 in the outlet side channel 8 through the sub channel 20. Thus, the water W after passing through the cooling system 4 is pressurized by the sub pump 19 and sent from the solvent supply flow path 13 to the scrubber 12. Here, the case where the sub-channel 20 is connected to the outlet-side channel 8 has been described as an example. However, as shown by a broken line in FIG. The channel 7 may be used, or the solvent supply channel 13 may be used. In any case, when the water W is pumped up to the scrubber 12, the sub pump 19 can make up for when the head of the cooling water pump 6 is insufficient.

  As the sub-pump 19, as described above, a dedicated pump for feeding water into the flow path from the cooling water pump 6 to the solvent supply flow path 13 can be separately installed, and has other purposes. A pump installed in the ship 1, for example, an emergency fire pump, a ballast pump, a cargo condenser pump, or the like can be used. When an emergency fire pump, ballast pump, cargo condenser pump, or the like is used as the sub pump 19, the space and cost for installing the sub pump 19 can be reduced. Further, when a dedicated pump other than an emergency fire pump, a ballast pump, a cargo condenser pump, or the like is installed as the sub pump 19, water W as a refrigerant is pumped up to the scrubber 12 alone as in the above reference example shown in FIG. Compared with the solvent pump 18 configured as described above, the head required for the sub pump 19 is small, and the installation space is small.

  Here, the case where the water W is led to the scrubber 12 as a solvent from the flow path downstream of the cooling water pump 6 has been described as an example. However, the pump used for pumping up the water W as the solvent is used only for the cooling water pump 6. It is not limited. For example, the present invention can be implemented in various combinations, such as using a ballast pump as the pump 6 and an emergency fire pump as the sub pump 19.

  Further, here, the case where the booster pump 15 (see FIG. 1) is not provided in the middle of the solvent supply flow path 13 has been described as an example, but the booster pump 15 is provided similarly to the first embodiment (see FIG. 1). The head of the booster pump 15 can be further supplemented by the sub pump 19.

  As described above, in the present second embodiment, in addition to the pump 6, the sub pump 19 that pumps the water W from the sea chest 5 is provided, and the solvent supply flow path from the pump 6 through the sub flow path 20 from the sub pump 19. Since the water W is sent to the flow path leading to 13, the water pump up to the scrubber 12 can be supplemented by the sub pump 19 when the head of the cooling water pump 6 is insufficient.

  In the second embodiment, the sub-pump 19 may be a pump installed in the ship 1 for purposes other than sending water W to the flow path from the pump 6 to the solvent supply flow path 13. In this way, the space and cost for installing the sub pump 19 can be reduced.

  Other configurations and operational effects are omitted because they are the same as those in the first embodiment (see FIG. 1), but also in the second embodiment, the space for installing the pump is reduced when installing the exhaust purification device. obtain.

  Note that the ship exhaust purification system and ship according to the present invention are not limited to the above-described embodiments. For example, the exhaust purification apparatus exhausts various substances that can be captured by water, such as PM, in addition to the sulfur content. Of course, various changes can be made without departing from the gist of the present invention, such as being usable for the purpose of removing from the scope of the present invention.

1 Ship 2 Cooling target equipment (engine)
3 Cooling target equipment (generator)
4 Cooling system 5 Sea chest 6 Pump (cooling water pump)
7 Inlet side channel 8 Outlet side channel 9 Exhaust channel 12 Exhaust gas purification device (scrubber)
13 Solvent supply flow path 14 Three-way valve 15 Booster pump 16 Solvent discharge flow path 19 Sub pump 20 Sub flow path W Water (solvent, refrigerant)

Claims (9)

An exhaust purification device installed in an exhaust passage through which exhaust gas discharged from a ship flows, and injecting water as a solvent into the exhaust gas;
A pump that draws water from the sea chest,
A solvent supply channel for guiding water as a solvent from the pump to the exhaust gas purification device ;
An inlet-side flow channel for drawing water from the sea chest;
An outlet-side flow path for discharging water out of the ship ,
The solvent discharge flow path through which the water discharged from the exhaust purification device flows joins the outlet side flow path,
The exhaust gas purification system for a ship, wherein the pump is installed in the ship for purposes other than guiding water as a solvent to the exhaust gas purification apparatus. The ship's exhaust gas purification system according to claim 1 , wherein the solvent supply channel is configured to guide water flowing through the outlet side channel to the exhaust gas purification device as a solvent. The solvent supply channel branches off from the outlet side channel and extends to the exhaust gas purification device, and a three-way valve is provided at a branch point of the outlet side channel to the solvent supply channel. The exhaust gas purification system for a ship according to claim 2 . A cooling system that cools the equipment to be cooled installed on the ship with water;
A cooling water pump that is arranged in the inlet-side flow path and feeds water drawn up from the sea chest into the cooling system as a refrigerant;
Utilizing the cooling water pump as the pump, the water pumped by the coolant pump, and configured to feed the exhaust gas purification device via the solvent supply channel, in any one of claims 1 to 3 The ship's exhaust gas purification system as described. The exhaust purification system for a ship according to any one of claims 1 to 3, wherein a ballast pump is used as the pump.   The exhaust purification system for a ship according to any one of claims 1 to 5, further comprising a booster pump that supplements a head of the pump in the middle of the solvent supply channel.   The apparatus according to claim 1, further comprising: a sub-pump for drawing water from a sea chest in addition to the pump, wherein water is sent from the sub-pump through the sub-flow path to a flow path from the pump to the solvent supply flow path. The exhaust purification system for a ship according to any one of the above.   The ship's exhaust purification system according to claim 7, wherein a pump installed in the ship having a purpose other than feeding water to the flow path from the pump to the solvent supply flow path is used as the sub pump.   A ship equipped with the ship exhaust gas purification system according to claim 1.

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