JP2020157781A - Tank arrangement of scr-mounted ship - Google Patents

Abstract

To provide a tank arrangement of an SCR-mounted ship capable of improving a degree of design freedom that a pure water tank requiring a large installation area can be installed not only on an upper deck but also on second and third decks, which is easy to use for controlling pure water supply, and capable of automatically performing an operation control of a pure water supply pump and so on, in the SCR-mounted ship of the next generation NOx3-regulatory compliance equipped with an urea water generating device to generate an urea water from the pure water and the urea powder held in the ship.SOLUTION: The SCR-mounted ship has an urea water generating device arranged on a second deck directly under the upper deck of an engine room, an urea powder warehouse arranged on the deck above an engine room with a powder input duct arranged at the position where the stored urea powder can be directly input into the urea water generating device, a pure water tank to store pure water installed away from the urea powder warehouse and the urea water generating device, and a pure water pump to supply the pure water to the urea water generating device connected to the pure water tank.SELECTED DRAWING: Figure 2

Description

The present invention relates to a tank arrangement of a ship equipped with an SCR (Selective Catalytic Reduction) (hereinafter referred to as “SCR”) denitration device corresponding to the NOx tertiary regulation.

Examples of technologies for complying with NOx tertiary emission regulations include the above-mentioned SCR denitration device, EGR (Exhaust Gas Recirculation: exhaust gas recirculation (hereinafter referred to as "EGR"), water technology, etc. It is about the tank arrangement in.
As a NOx tertiary regulation compliant ship, for example, a ship disclosed in Japanese Patent Application Laid-Open No. 2017-217982 is known. The one disclosed in Japanese Patent Application Laid-Open No. 2017-217982 relates to the invention name "Hull Structure" and aims at "making it possible to easily modify a vessel compliant with the secondary regulation of NOx into a vessel compliant with the tertiary regulation of NOx". In the invention solving problem (see paragraph 0005 of the specification of the same publication), "the device installation area for installing the exhaust gas purification system for reducing nitrogen oxides contained in the exhaust gas is set on the upper deck and the engine. By adopting a configuration that "forms around the casing" (see the description of claim 1 of the specification of the same publication), "a ship compliant with NOx secondary regulation can be easily refurbished to a ship compliant with NOx tertiary regulation". (See paragraph number 0011 of the specification of the same publication).
7 and 8 are schematic views of a ship to which the first embodiment of the disclosed invention of Japanese Patent Application Laid-Open No. 2017-217982 shown as FIGS. 1 and 6 is applied to JP-A-2017-217982 as viewed from the side. (FIG. 7), it is a cross-sectional view of the main body of the exhaust gas purification system, showing the equipment arrangement on the stern side of the low-pressure SCR reactor, and the ship viewed from the rear (FIG. 8).

In FIGS. 7 and 8, reference numeral 111 is the stern portion, 112 is the upper deck, 113 is the living area, 114 is the engine casing, 115 is the equipment installation area, 116 is the engine room, and 117 is the main engine. , 118 is a chimney, 171 is a first deck (A deck), 172 is a second deck (B deck), 180 is a urea water production device, 181 is a urea water tank, and 182 is a bag shape. The packaging material, 183 is a rail, 184 is an opening, 185 is a provision crane, 186 is a hatch for carrying urea powder, and 187 is a ventilator (note that the reference numerals are clear to be prior art). In order to achieve this, the applicant of the present application changed the number to three digits for explanation.)

Although the NOx3rd regulation compliant ship having the ship structure shown in FIGS. 7 and 8 is a NOx3rd regulation compliant ship, the equipped urea water production apparatus 180 and the urea water tank 181 are arranged on the upper deck 112 (same as above). Scope of Claims of the Gazette (see the description of claim 7) Further, the urea powder opening is formed on the deck 172 above the deck 171 on which the urea water production apparatus 180 is placed (Claims of the same gazette, claim 9). (Refer to the description, etc.). As shown in FIG. 8, the NOx tertiary regulation compliant ship has the SCR urea water production apparatus 180 and the urea water tank 181 both arranged close to each other on the A deck which is the first deck 171. It is an arrangement configuration.

FIG. 9 is a diagram showing an outline of a NOx3rd regulation compliant ship implemented by the applicant company of the present application. In FIG. 9, reference numeral 200 is a NOx3rd regulation compliant ship, 201 is an upper deck, and 202 is below it. The second deck, 203 is the third deck further below, 204 is the urea water generator, 205 is the urea powder warehouse, 206 is the powder input duct, 207 is the pure water tank, and 208 is the pure water supply. Line 209 is a urea water transfer pump, 210 is a urea water transfer line, 211 is a urea water storage tank, 212 is a urea landing pump, and 213 is a urea water landing line, and urea loaded on board. Powder and pure water are supplied to the urea water generator 204, and the generated urea water is supplied to the SCR denitration device to reduce NOx contained in the exhaust gas.

However, the urea water used for this type of NOx tertiary regulation compliant SCR-equipped ship shown in FIGS. 7-9 is required to have a concentration equivalent to 40% of AUS40 defined in ISO18611-3. Therefore, although it depends on the size of the ship to be mounted, the pure water tank installed therein also requires a tank having a capacity of at least 1000 to 2000 L. However, there may be no suitable area on the upper decks 112, 201 of the vessel or near the urea water generators 180, 204, and other storage locations may have to be considered.

JP-A-2017-217982

Therefore, the present invention relates to a pure water tank that requires a large installation area in a ship equipped with a NOx tertiary regulation SCR equipped with a urea water generator that generates urea water from urea powder and pure water stored in the ship. It can be installed not only on the upper deck but also on the 2nd and 3rd decks, improving the degree of freedom in design, and is easy to use for controlling the pure water supply, enabling automatic operation control of the pure water supply pump, etc. It is an object of the present invention to provide a tank arrangement for a ship conforming to the NOx tertiary regulation.

In order to solve the above problems, the invention according to claim 1 of the present application is stored with a urea water generator arranged on the second deck directly below the upper deck of the engine room in the tank arrangement of the SCR-equipped ship. The urea powder is installed separately from the urea powder warehouse and the urea water generator, which are arranged on the upper deck of the engine room having a powder input duct where the urea powder can be directly charged into the urea water generator. It is characterized by having a pure water tank for storing pure water and a pure water pump for supplying pure water to a urea water generator connected thereto.
Further, according to the second aspect of the present application, in the tank arrangement of the SCR-equipped ship according to the first aspect, the pure water tank arranged on the third deck below the second deck and the urea water generation connected thereto. A pure water pump that supplies pure water to the device and a pure water pump that is connected to the pure water pump to detect the internal pressure, start the pure water pump when the specified low pressure is reached, and the pure water when the specified high pressure is reached. It is characterized by having a pressure tank for stopping the pump and a valve for adjusting the flow rate of pure water arranged in the vicinity of the urea water generator.
Further, the invention according to claim 3 of the present application is stored in a pump for supplying pure water from a pure water tank to a urea water generator and a urea water storage tank in the tank arrangement of the SCR-equipped ship according to claim 1 or 2. It is characterized in that it is a pump that is also used as a pump for landing urea water.

With the above configuration, the present invention has the following effects.
(1) A ship equipped with a NOx tertiary regulation SCR equipped with a urea water generator that generates urea water from urea powder and pure water stored on board is easy to use for supplying pure water, and automatic operation control of the supply pump, etc. It has the effect of enabling.
(2) While a pump is installed near the pure water tank so that pure water can be sent when needed, a valve can be installed in the pure water pipe near the urea water generator to manually control the supply. it can.
(3) When the pump for landing urea water and the pump for transferring pure water are used in combination, the constituent equipment can be simplified, and the peripheral equipment configuration of the urea water generator, which is expected to be increasingly adopted in the future. Can be simplified.
(4) Even when the pure water pump and the pure water tank are not arranged near the urea water generator, the pressure tank is provided, so that the pure water pump can be automatically controlled and the pure water can be kept in a constant pressure range. It will be possible to supply within.

FIG. 1 is a diagram showing an outline of a tank arrangement of an SCR-equipped ship according to a first embodiment for carrying out a tank arrangement of an SCR-equipped ship according to the present invention. FIG. 2 is a diagram showing an outline of the tank arrangement 1a of the SCR-equipped ship according to the second embodiment. FIG. 3 is a diagram showing an outline of automatic operation control of the pure water pump 9 by providing the pressure tank 16 in the tank arrangement 1a of the SCR-equipped ship according to the second embodiment. FIG. 4 is a diagram showing an outline of tank arrangement of the SCR-equipped ship according to the third embodiment. FIG. 5 is a diagram showing an outline of tank arrangement of the SCR-equipped ship according to the fourth embodiment. FIG. 6 is a diagram showing an outline of automatic operation control of a pure water pump 9b for both urea landing and landing by providing a pressure tank 16b in the tank arrangement 1c of the SCR-equipped ship according to the fourth embodiment. FIG. 7 is a schematic view of a ship to which the first embodiment of the disclosed invention of JP-A-2017-217982, which is shown as FIG. 1 in JP-A-2017-217982, is applied, as viewed from the side. FIG. 8 shows the equipment arrangement in the stern side of the low-pressure SCR reactor in the main body of the exhaust gas purification system of the disclosed invention of Japanese Patent Application Laid-Open No. 2017-217982 shown as FIG. It is a figure. FIG. 9 is a diagram showing an outline of an SCR-equipped ship that complies with the NOx tertiary regulation implemented by the applicant company of the present application.

An embodiment for carrying out the tank arrangement of the SCR-equipped ship according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an outline of a tank arrangement of an SCR-equipped ship according to a first embodiment for carrying out the present invention.
In FIG. 1, reference numeral 1 is a tank arrangement of the SCR-equipped ship according to the first embodiment, 2 is an upper deck, 2a is an engine room upper deck (deck), and 3 is a second deck one step lower. 4 is a third deck further down, 5 is a urea water generator installed on the second deck 3, 6 is a urea powder warehouse installed on the upper deck 2, and 7 is a powder injection duct. , 8 is a pure water tank, 9 is a pure water pump, 10 is a pure water line, 11 is a urea water transfer pump, 12 is a urea water transfer line, 13 is a urea water storage tank, and 14 is a urea water storage tank. A landing pump, 15 is a urea landing line.

As is clear from FIG. 1, in the tank arrangement 1 of the SCR-equipped ship according to the first embodiment, the urea powder stored in the urea powder warehouse 6 and the pure water stored in the pure water tank 8 are loaded into the ship in advance. , Both of them are guided to the urea water generator 5 at an appropriate ratio, and the generated urea is stored in the urea water storage tank 13 in preparation for NOx tertiary regulated sea area (NOx-ECA) navigation, and SCR for regulated sea area navigation. It is supplied to a denitration device to reduce NOx to comply with the NOx tertiary regulation.

That is, in the urea water generator 5 used for this type of SCR denitration device, the urea powder is usually packed in a 20 kg bag or a fresco bag and loaded on the ship by a dabit crane or the like, but since it is in powder form, it is in the form of powder. Although there is a limit to the movement on board, the location of pure water, which is a liquid, can be determined relatively freely by the pump and line (pipe). Therefore, the applicant of the present application considers that the urea powder warehouse 6 and the powder injection duct 7 for storing the urea powder are carried into the ship and then introduced into the urea water generating device 5, and the urea water generating device is considered. Urea water is generated on the deck (deck) directly above the deck (for example, when the urea water generator 5 is arranged in the engine room, the upper deck 2a of the engine room) and through the powder injection duct 7. While arranging the pure water tank 8 at a position where it can be directly charged into the device 5, the pure water tank 8 is located on the second deck 3 one step below, which is a place away from the urea water generator 5 without being close to the urea water generator 5. It is possible to install an appropriate deck such as the third deck 4 two steps below, and the degree of freedom in design is secured.

Specifically, in the tank arrangement 1 of the SCR-equipped ship according to the first embodiment, the urea powder stored in the urea powder warehouse 6 is the urea powder on the upper deck 2a of the engine room in consideration of loading and inboard work. While the warehouse 6 is arranged, as shown in FIG. 1, the pure water tank 8 for storing the pure water supplied to the urea water generator 5 is installed at a place away from the urea water generator 5 and By using the pure water pump 9, pure water can be sent to the urea water generator 5 even from a remote place.

By doing so, in the tank arrangement 1 of the SCR-equipped ship according to the first embodiment, the pure water pump 9 for injecting pure water is installed, so that the pure water tank 8 is considerably separated from the urea water generator 5. Pure water can be transferred even when it is installed at a position, and the degree of freedom regarding the installation location of the pure water tank 8 is improved.
The urea water used in SCR has an expiration date, and it is stipulated that the urea water whose expiration date has passed is landed and disposed of (ISO18611-3), and the urea water landing line 15 is used. This is the line (piping) for this purpose.

Next, a modified example of the tank arrangement 1 of the SCR-equipped ship according to the first embodiment will be described with reference to the drawings.
FIG. 2 is a diagram showing an outline of the tank arrangement 1a of the SCR-equipped ship according to the second embodiment. In FIG. 2, reference numeral 16 is a pressure tank, and reference numerals 10a and 10b are inlets of the pressure tank 16. It is a pure water line connected to the side and the outlet side, and the same members as those shown in FIG. 1 are indicated by the same reference numerals, and detailed description thereof will be omitted.

In the tank arrangement 1a of the SCR-equipped ship according to the second embodiment, the urea powder warehouse 6 is arranged on the upper deck 2a of the engine room at the same level as the upper deck 2, and the urea water generator 5 is one step lower on the second deck. The pure water tank 8 is arranged on the third deck 4 one step below the installation deck of the urea water generator 5, and the pure water tank 8 and the urea water generator 5 of the pure water line 10 are arranged. A pressure tank 16 is provided between the two, so that the operation control of the pure water pump 9 can be automatically performed.

In the tank arrangement 1a of the SCR-equipped ship according to the second embodiment, as is clear from FIG. 2, the pure water tank 8 is arranged on the third deck 4, and the pressure tank 16 is on the second deck 3. Is placed in. This is because when the urea water is consumed by the SCR denitration device, the storage amount of the urea water storage tank 13 decreases, and the urea water generation device 5 must generate urea water, so that pure water can be supplied. When controlling the pure water pump 9, the pressure detection switch (not shown) of the pressure tank 16 automatically controls the pump to start when the pressure is low and to stop when the pressure is high. Is.

FIG. 3 is a diagram showing an outline of automatic operation control of the pure water pump 9 by providing a pressure tank 16 in the tank arrangement 1a of the SCR-equipped ship according to the second embodiment. Further, in FIG. 3, reference numeral 17 is a valve provided in the vicinity of the urea water generator 5 of the pure water line 10, and 18 is a urea water generation such as a shortage of urea powder / pure water or a failure of the urea water generator 5. It is a loading line (pipe) that directly transfers urea water generated on the land side from the land side to the storage tank 13 when the device 5 cannot be used, and the remaining reference numerals are the same members as those shown in FIGS. 1 and 2. Is indicated by the same code.

The pressure tank 16 in the tank arrangement 1a of the SCR-equipped ship according to the second embodiment has a built-in pressure sensor (not shown) in the tank 16, and the pressure of the urea water storage tank 13 drops to a predetermined low pressure. In this case, the pure water pump 9 is started, while the pure water pump 9 is stopped when a predetermined high pressure is reached. Therefore, in the tank arrangement 1a of the SCR-equipped ship according to the second embodiment, when urea powder is charged into the urea water generator 5 and mixing with pure water is required, the amount of urea powder charged is adjusted. The pure water can be supplied within a certain pressure range accordingly.

In the urea water generator 5 used by the applicant company of the present application, the maximum amount of urea powder to be added is determined by the manufacturer's specifications and the like, and 1500 L (liter) of pure water is added to the maximum amount of urea powder to be added to 1000 kg. As a result, those with specifications such as producing 2250 L (liter) of urea water are used. From such a request, for example, when urea water is consumed and 800 kg of powder of 40 bags of 20 kg urea powder is put into the urea water generator 5, 1200 L (liter) of pure water is supplied from the pure water tank 8. Is supplied within a certain pressure range while automatically controlling the pump. As a result, 1800 L (liter) of urea water can be produced.

As described above, in the tank arrangement 1a of the SCR-equipped ship according to the second embodiment, since the pressure tank 16 is provided, the pure water tank 8 needs to be provided at a close position such as the same level as the urea water generator 5. Even if the urea water generator 5 is installed on the third deck 4 or the like one step below the second deck 3, the pure water pump 9 can be automatically controlled.
When it is necessary to adjust the supply amount of pure water, as shown in FIG. 3, a valve 17 is provided in the vicinity of the urea water generator 5 of the pure water line 10, and the valve 17 is opened and closed to manually perform pure water. It makes it possible to control the amount of water supplied.

By doing so, in the tank arrangement 1a of the SCR-equipped ship according to the second embodiment, the pressure tank 16 for starting / stopping control is provided, so that the pure water pump 9 is located close to the urea water generator 5. Even if this is not the case, the pure water pump 9 can be automatically controlled.

Next, Example 3 of the present invention will be described.
Example 3 of the present invention is an example in which a pump that also serves as a urea landing pump 14 and a pure water pump 9 is used in the tank arrangements 1 and 1a of the SCR-equipped ship according to the first or second embodiment. ..

FIG. 4 is a diagram showing an outline of the tank arrangement of the SCR-equipped ship according to the third embodiment. In FIG. 4, the code 1b is the tank arrangement of the SCR-equipped ship according to the third embodiment, and 9a is the embodiment. 1 or the pure water pump 9a for both urea landing and the pure water pump 9 in the tank arrangements 1 and 1a of the SCR-equipped ship according to the second embodiment, and 10c is from the pure water tank 8. The pure water suction line to the pure water pump 9a for raising the urea water device, 10d is the pure water supply line from the pure water pump 9a for landing and landing the urea to the urea water generator 5, and the remaining reference numerals are shown in FIG. The same members as those shown in FIG. 3 are indicated by the same reference numerals.

As is clear from FIG. 4, in the tank arrangement 1b of the SCR-equipped ship according to the third embodiment, the urea water generator 5, the pure water tank 8, and the urea water storage tank 13 are all placed on the second deck 3. When using the urea water landing and pure water pump 9a which is arranged and also used by the urea landing pump 14 and the pure water pump 9, and supplying pure water to the urea water generator 5, the pure water tank 8 is used. Pure water is supplied to the urea water generator 5 via the pure water suction line 10c up to the urea water landing pure water pump 9a and the pure water supply line 10d from the urea water landing combined pure water pump 9a to the urea water generator 5. To do.

By doing so, the tank arrangement 1b of the SCR-equipped ship according to the third embodiment unifies the two pumps (urea landing pump 14 and the pure water pump 9) into one urea landing and pure water pump 9a. By doing so, it is possible to improve the installation space and simplify the constituent devices.

The pure water pump 9a for both landing and landing of urea can be switched by operating the valves attached to the inlet side and outlet side of the pure water pump 9a for landing and landing urea. It functions as a pure water pump when necessary, and functions as a urea landing pump when urea landing is required. When the urea water is landed, the SCR denitration device does not require urea water because it is not sailing in the regulated sea area, and the urea water is not landed during the regulated sea area navigation where the SCR denitration device requires urea water. Since it is sufficient to have only one of the pumps, the above-mentioned installation space and equipment simplification are realized by using one urea landing and landing pure water pump 9a that also serves as these.

FIG. 5 is a diagram showing an outline of the tank arrangement of the SCR-equipped ship according to the fourth embodiment, and while using the urea landing and landing pure water pump 9b, the urea landing and landing pure water pump 9b is generated. A pressure tank 16b for stop control is provided so that the pure water pump 9b for both urea landing and landing is automatically controlled. In FIG. 5, reference numeral 1c is a tank arrangement of the SCR-equipped ship according to the fourth embodiment, 9b is a pure water pump for landing urea, 16b is a pressure tank, and 10c is a pure water tank 8 for landing urea. The suction line to the pure water pump 9b, 10e is the water supply line from the urea water landing combined pure water pump 9b to the pressure tank 16b, and 10f is the pure water supply line from the pressure tank 16b to the urea water generator 5. The remaining reference numerals are the same as those shown in FIGS. 1 to 4, and the same members are indicated by the same reference numerals.

As shown in FIG. 5, in the tank arrangement 1c of the SCR-equipped ship according to the fourth embodiment, the pure water tank 8 is arranged on the third deck 4, and the pressure tank 16b is arranged on the second deck 3. Will be done. That is, when urea water is consumed by the SCR denitration device, the storage amount of the urea water storage tank 13 decreases, and when urea water is generated by the urea water generation device 5, the pressure detection switch of the pressure tank 16b (not shown). This is to automatically control the pump to start when the pressure becomes low and to stop when the pressure becomes high.

FIG. 6 is a diagram showing an outline of automatic operation control of a pure water pump 9b for both urea landing and landing by providing a pressure tank 16b in the tank arrangement 1c of the SCR-equipped ship according to the fourth embodiment.
In FIG. 6, the same members shown in FIGS. 2 to 5 have the same reference numerals, and the same members shown in FIGS. 2 to 5 have the same functions as shown in FIGS. Is omitted.

The urea water landing and pure water pump 9b in the tank arrangement 1c of the SCR-equipped ship according to the fourth embodiment has a function of landing urea water whose expiration date has expired from the urea water storage tank 13 and pure water from the pure water tank 8. It also has a function of sending to the urea water generator 5, and the urea water landing and pure water pump 9b has two valves 21 and 22 for supplying and draining pure water and two valves for supplying and draining urea water. It has a total of four valves 23 and 24, and when pure water is supplied, the valves 21 and 22 are opened and the valves 23 and 24 are closed. When the urea is landed, the valves 21 and 22 are closed and the valves 23 and 24 are opened. The opening operation is performed manually, and the supply of pure water to the urea water generator 5 detects the pressure in the pressure tank 16b with a limit switch (not shown) for detecting the opening and closing of the valves 21 to 24 and the pressure in the tank. A pressure switch (not shown) is provided, and only when the valves 21 and 22 are opened and the valves 23 and 24 are closed, the urea landing and landing pure water pump 9b is started when the predetermined low pressure is reached. It has a function of stopping the pure water pump 9b for landing and landing urea when a predetermined high pressure is reached. Therefore, in the tank arrangement 1c of the SCR-equipped ship according to the fourth embodiment, when urea powder is charged into the urea water generator 5 and mixing with pure water is required, the pure water is placed in a constant pressure range. It is made to be able to be supplied within

The present invention is used for tank arrangement of SCR-equipped ships that comply with NOx tertiary regulation.

1 Tank layout of the SCR-equipped ship according to Example 1 1a Tank layout of the SCR-equipped ship according to Example 2 1c Tank layout of the SCR-equipped ship according to Example 3 2 Upper deck 2a Engine room upper deck 3 Second deck 4 No. 3 Deck 5 Urea water generator 6 Urea powder warehouse 7 Powder input duct 8 Pure water tank 9 Pure water pump 9a, 9b Urea landing combined pure water pump 10, 10a, 10b, 10c, 10d, 10e, 10f Pure water line 11 Urea water transfer pump 12 Urea water transfer line 13 Urea water storage tank 14 Urea water landing pump 15 Urea water landing line 16, 16b Pressure tank 17 Valve 18 Loading line 21 to 24 Valve 111 Stern 112 Upper deck 113 Residential area 114 Engine casing 115 Equipment installation area 116 Engine room 117 Main engine 118 Chimney 171 First deck 172 Second deck 180 Urea water production equipment 181 Urea water tank 182 Bag-shaped packaging material 183 Rail 184 Opening 185 Provision crane 186 For carrying urea powder Hatch 187 Ventilator 200 NOx Tertiary regulation compliant ship 201 Upper deck 201 2nd deck 203 3rd deck 204 Urea water generator 205 Urea powder warehouse 206 Powder input duct 207 Pure water tank 208 Pure water supply line 209 Urea water transfer Out pump 210 Urea water transfer line 211 Urea water storage tank 212 Urea landing pump 213 Urea landing line

In order to solve the above problems, the invention according to claim 1 of the present application is stored with a urea water generator arranged on the second deck directly below the upper deck of the engine room in the tank arrangement of the SCR-equipped ship. A urea powder warehouse located on the upper deck of the engine room having a powder injection duct in a position where the urea powder can be directly charged into the urea water generator, and a urea powder warehouse and a urea water generator away from the second deck. A pure water pump that supplies pure water to the pure water tank arranged on the third deck and the urea water generator connected to it, and a pure water pump that is connected to the pure water pump to detect the internal pressure and reach a predetermined low pressure. It has a pressure tank that starts the pure water pump at that time and stops the pure water pump when a predetermined high pressure is reached, and a valve that adjusts the flow rate of pure water arranged in the vicinity of the urea water generator. It is characterized by.
Further, the invention according to claim 2 of the present application is stored in a pump for supplying pure water from a pure water tank to a urea water generator and a urea water storage tank in the tank arrangement of the SCR-equipped ship according to claim 1. It is characterized in that it is a pump that is also used as a pump for landing urea water.

Claims (3)

A urea water generator located on the second deck just below the upper deck of the engine room,
A urea powder warehouse located on the upper deck of the engine room having a powder charging duct where the stored urea powder is placed at a position where it can be directly charged into the urea water generator.
An SCR characterized by having a pure water tank for storing pure water installed away from the urea powder warehouse and the urea water generator, and a pure water pump for supplying pure water to the urea water generator connected thereto. The tank layout of the onboard ship. A pure water pump that supplies pure water to a pure water tank located on the third deck under the second deck and a urea water generator connected to the pure water tank.
A pressure tank that is connected to a pure water pump, detects the internal pressure, starts the pure water pump when a predetermined low pressure is reached, and stops the pure water pump when a predetermined high pressure is reached.
A valve that adjusts the flow rate of pure water placed near the urea water generator,
The tank arrangement of the SCR-equipped ship according to claim 1, wherein the ship is equipped with SCR. The invention according to claim 1 or 2, wherein the pump is a pump that supplies pure water from a pure water tank to a urea water generator and a pump that unloads urea water stored in a urea water storage tank. Tank layout of SCR-equipped ships.

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