JP2017019415A - Cleaning water supply system - Google Patents

Cleaning water supply system Download PDF

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JP2017019415A
JP2017019415A JP2015139064A JP2015139064A JP2017019415A JP 2017019415 A JP2017019415 A JP 2017019415A JP 2015139064 A JP2015139064 A JP 2015139064A JP 2015139064 A JP2015139064 A JP 2015139064A JP 2017019415 A JP2017019415 A JP 2017019415A
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cleaning water
pump
water supply
supply system
cleaning
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和樹 今村
Kazuki Imamura
和樹 今村
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Mitsui Engineering and Shipbuilding Co Ltd
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Mitsui Engineering and Shipbuilding Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a cleaning water supply system which supplies cleaning water to a waste gas cleaning device for a ship and has a high degree-of-freedom of design.SOLUTION: An open mode cleaning water supply sequence 14, which uses cleaning water introduced from a sea chest 17 in an exhaust gas cleaning device 12, and after use, discharges cleaning water outside a hull is provided. In the open mode cleaning water supply sequence 14, cleaning water introduced from an exterior of the hull is pumped by a first pump P1 which is located below a light draft line WL. Cleaning water pumped by the first pump P1 is pressurized by a second pump P2 which is located in an engine room above the light draft line WL, and is delivered to the exhaust gas cleaning device 12.SELECTED DRAWING: Figure 1

Description

本発明は、排ガス洗浄装置へ洗浄水を供給する洗浄水供給システムに関する。   The present invention relates to a cleaning water supply system that supplies cleaning water to an exhaust gas cleaning device.

船舶における硫黄分に関する排ガス規制の対策として、排ガス洗浄装置を用いた脱硫が考えられる。排ガス洗浄装置では、エンジンからの排気ガスに洗浄水を接触混合させ、排気ガス中の硫黄酸化物等を取り除いており、洗浄水には例えば海水が用いられる（特許文献１）。   Desulfurization using an exhaust gas cleaning device can be considered as a countermeasure for exhaust gas regulations concerning sulfur content in ships. In the exhaust gas cleaning apparatus, cleaning water is brought into contact with the exhaust gas from the engine to remove sulfur oxides and the like in the exhaust gas, and seawater is used as the cleaning water (Patent Document 1).

特開２００７−２４５０５５号公報JP 2007-245055 A

海水を排ガス洗浄装置の洗浄水に用いる場合には、従来専用ポンプで海水を汲み上げて機関室内に配置される排ガス洗浄装置まで海水を送出する。このようなポンプは、海水を汲み上げるために常に喫水下となる船底付近に配置する必要があり、その容量および吐出圧も大きい。しかし、船底付近のデッキスペースは狭い上、バラスト水や冷却水に用いる海水をハンドリングするためのポンプやその予備ポンプが多数設置されるため、新たに排ガス洗浄装置のためのポンプを設置するには設計上大きな制約がある。   When seawater is used as cleaning water for the exhaust gas cleaning device, the seawater is pumped up by a conventional dedicated pump and sent to the exhaust gas cleaning device arranged in the engine room. Such a pump needs to be arranged near the bottom of the ship which is always under draft in order to pump up seawater, and has a large capacity and discharge pressure. However, the deck space near the bottom of the ship is small, and there are many pumps and spare pumps for handling seawater used for ballast water and cooling water. To install a new pump for exhaust gas cleaning equipment There are significant design constraints.

本発明は、船舶用の排ガス洗浄装置へ洗浄水を供給する設計上の自由度の高い洗浄水供給システムを提供することを目的としている。   An object of the present invention is to provide a cleaning water supply system having a high degree of freedom in design for supplying cleaning water to an exhaust gas cleaning apparatus for ships.

本発明の船舶用の洗浄水供給システムは、船体外から取り込んだ洗浄水を排ガス洗浄装置で使用後、船体外へ排出するオープンモードの洗浄水供給系列を備える船舶用の洗浄水供給システムであって、洗浄水供給系列は、軽荷喫水よりも下に配置され、船体外から取り込まれた洗浄水を汲み上げる第１ポンプと、軽荷喫水よりも上に配置され、第１ポンプにより汲み上げられた洗浄水に更に圧を加え排ガス洗浄装置へ送出する第２ポンプとを備えることを特徴としている。   The cleaning water supply system for a ship according to the present invention is a cleaning water supply system for a ship provided with an open mode cleaning water supply system that discharges the cleaning water taken from outside the hull to the outside of the hull after being used in the exhaust gas cleaning device. The washing water supply line was placed below the light cargo draft, and was placed above the light cargo draft and was pumped up by the first pump. And a second pump for further applying pressure to the cleaning water and sending it to the exhaust gas cleaning device.

洗浄水を循環利用するクローズドモードの洗浄水供給系列を更に備え、クローズドモードで使用される洗浄水が第２ポンプを通して排ガス洗浄装置へ供給されることが好ましい。また、このときクローズドモードで使用される洗浄水を冷却するための熱交換器を備える。   It is preferable that a cleaning water supply system for closed mode that circulates and uses the cleaning water is further provided, and the cleaning water used in the closed mode is supplied to the exhaust gas cleaning device through the second pump. Moreover, the heat exchanger for cooling the wash water used at this time in closed mode is provided.

クローズドモードで使用される洗浄水は、例えば第１ポンプにより汲み上げられ、熱交換器を介して第２ポンプに供給される。また、洗浄水供給システムは、軽荷喫水よりも下に配置され、船体外から取り込まれた冷却水を熱交換器に汲み上げる第３ポンプを備える。   The wash water used in the closed mode is pumped up by, for example, the first pump, and is supplied to the second pump through the heat exchanger. Further, the washing water supply system includes a third pump that is disposed below the light cargo draft and pumps the cooling water taken from outside the hull to the heat exchanger.

またクローズドモードで使用される洗浄水は、例えば軽荷喫水よりも上に配置される第４ポンプにより汲み上げられ、熱交換器を介して第２ポンプに供給される。このとき第１ポンプは、例えば熱交換器に供給される冷却水も汲み上げてもよい。更に第１ポンプは、船舶に設備される熱交換器以外の冷却機器へも冷却水を供給可能であってもよい。オープンモードで使用される洗浄水の供給と、熱交換器で使用される冷却水の供給は、択一的切り換えられる。また第２ポンプは機関室に配置されることが好ましい。   In addition, the wash water used in the closed mode is pumped up by, for example, a fourth pump disposed above the light draft, and is supplied to the second pump via the heat exchanger. At this time, the first pump may also pump up cooling water supplied to the heat exchanger, for example. Further, the first pump may be capable of supplying cooling water to a cooling device other than the heat exchanger installed in the ship. The supply of cleaning water used in the open mode and the supply of cooling water used in the heat exchanger are alternatively switched. The second pump is preferably disposed in the engine room.

また本発明の船舶は、上記の何れかの洗浄水供給システムを備えることを特徴としている。   Moreover, the ship of this invention is equipped with one of said washing water supply systems, It is characterized by the above-mentioned.

本発明によれば、船舶用の排ガス洗浄装置へ洗浄水を供給する設計上の自由度の高い洗浄水供給システムを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the washing water supply system with a high design freedom which supplies washing water to the exhaust gas cleaning apparatus for ships can be provided.

本発明の第１実施形態である洗浄水供給システムの構成を示すブロック図である。It is a block diagram which shows the structure of the washing water supply system which is 1st Embodiment of this invention. 第２実施形態の洗浄水供給システムの構成を示すブロック図である。It is a block diagram which shows the structure of the washing water supply system of 2nd Embodiment. 第３実施形態の洗浄水供給システムの構成を示すブロック図である。It is a block diagram which shows the structure of the washing water supply system of 3rd Embodiment.

以下、本発明の実施形態について添付図面を参照して説明する。
図１は、本発明の第１実施形態である排ガス洗浄装置へ洗浄水を供給する洗浄水供給システムの構成を示すブロック図である。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a block diagram illustrating a configuration of a cleaning water supply system that supplies cleaning water to an exhaust gas cleaning apparatus according to a first embodiment of the present invention.

第１実施形態の洗浄水供給システム１０は、例えば船舶の機関室に配置される排ガス洗浄装置１２へ洗浄水を供給するシステムである。排ガス洗浄装置１２は、エンジン等における化石燃料の燃焼により排出される排気ガスから例えば硫黄酸化物等を取り除く湿式のスクラバである。本実施形態には、船体外から取り込んだ洗浄水（海水または清水）を排ガス洗浄装置１２へ供給し、使用の後船体外へ排出するオープンモードの洗浄水供給系列１４と、船体内で洗浄水（海水または清水）を循環させ、冷却して使用するクローズドモードの洗浄水供給系列１６が設けられる。オープンモードとクローズドモードは、運航海域により適宜択一的に選択され、切り換えられる。   A cleaning water supply system 10 according to the first embodiment is a system that supplies cleaning water to an exhaust gas cleaning device 12 disposed in an engine room of a ship, for example. The exhaust gas cleaning device 12 is a wet scrubber that removes, for example, sulfur oxide from exhaust gas discharged by combustion of fossil fuel in an engine or the like. In the present embodiment, the cleaning water (seawater or fresh water) taken from outside the hull is supplied to the exhaust gas cleaning device 12 and discharged to the outside of the hull after use. A closed mode washing water supply system 16 is provided that circulates (seawater or fresh water) and uses it after cooling. The open mode and the closed mode are selected and switched as appropriate according to the operating sea area.

オープンモードの洗浄水供給系列１４は、軽荷喫水線ＷＬよりも下に配置される第１ポンプＰ１を用いて、シーチェスト１７を通して船体内に取り込まれた洗浄水を汲み上げる。汲み上げられた洗浄水は、軽荷喫水線ＷＬよりも上に配置される第２ポンプＰ２に送出され、第２ポンプＰ２で加圧されて排ガス洗浄装置１２へと供給される。排ガス洗浄装置１２で洗浄に使用された洗浄水は、その後船体外へと排出される。なお、本実施形態では第２ポンプＰ２および排ガス洗浄装置１２は、機関室に配置される。   The washing water supply system 14 in the open mode pumps up the washing water taken into the hull through the sea chest 17 using the first pump P1 disposed below the light cargo water line WL. The wash water pumped up is sent to the second pump P2 arranged above the light load water line WL, pressurized by the second pump P2, and supplied to the exhaust gas cleaning device 12. The cleaning water used for cleaning by the exhaust gas cleaning device 12 is then discharged out of the hull. In the present embodiment, the second pump P2 and the exhaust gas cleaning device 12 are disposed in the engine room.

本実施形態では、クローズドモードの洗浄水供給系列１６の洗浄水には清水タンク１８に貯留される清水が用いられる。排ガス洗浄装置１２から回収された清水の洗浄水は、清水タンク１８に一旦貯留される。清水タンク１８の洗浄水は、一旦軽荷喫水線ＷＬよりも下のデッキまで送られ、第１ポンプＰ１により汲み上げられて熱交換器２０を通して冷却される。熱交換器２０で冷却された洗浄水は更に第２ポンプＰ２において加圧され排気ガス洗浄装置１２へ供給される。   In the present embodiment, fresh water stored in the fresh water tank 18 is used as the wash water of the wash water supply system 16 in the closed mode. The clean water from the exhaust gas cleaning device 12 is temporarily stored in the clean water tank 18. The cleaning water in the fresh water tank 18 is once sent to a deck below the light load water line WL, pumped up by the first pump P1, and cooled through the heat exchanger 20. The cleaning water cooled by the heat exchanger 20 is further pressurized by the second pump P2 and supplied to the exhaust gas cleaning device 12.

熱交換器２０の冷却水は、シーチェスト１７を通して船体外から取り込まれる海水や清水であり、軽荷喫水線ＷＬよりも下に配置された第３ポンプＰ３により汲み上げられる。また、軽荷喫水線ＷＬよりも下には、第５ポンプＰ５が設けられ、シーチェスト１７を通して船体外から取り込まれる海水や清水を、熱交換器２０以外のエンジン冷却水などの冷却機器２２へ供給する。なお、熱交換器２０、冷却機器２２から排出された冷却水は、その後一緒に船体外へ排出される。   The cooling water of the heat exchanger 20 is seawater or fresh water taken from outside the hull through the sea chest 17 and is pumped up by the third pump P3 disposed below the light cargo water line WL. In addition, a fifth pump P5 is provided below the light load water line WL, and seawater and fresh water taken from outside the hull through the sea chest 17 are supplied to a cooling device 22 such as engine cooling water other than the heat exchanger 20. To do. Note that the cooling water discharged from the heat exchanger 20 and the cooling device 22 is then discharged together outside the hull.

以上のように、第１実施形態によれば、オープンモードで使用される洗浄水をハンドリングするポンプを軽荷喫水線の上下に分割することで、船底付近のデッキに設置されるポンプ吐出圧を低くすることができ、小型なポンプを採用できるので、設計の自由度を向上することができる。   As described above, according to the first embodiment, by dividing the pump for handling the wash water used in the open mode above and below the light load water line, the pump discharge pressure installed on the deck near the ship bottom is lowered. Since a small pump can be employed, the degree of freedom in design can be improved.

次に、図２を参照して、第２実施形態の洗浄水供給システム２４について説明する。なお図２は、第２実施形態の洗浄水供給システム２４の構成を示すブロック図である。以下の説明においては、第１実施形態とその構成が異なる点のみ説明を行ない、第１実施形態と共通する構成に関しては同一参照符号を用いるとともにその説明を省略する。   Next, the cleaning water supply system 24 of the second embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the cleaning water supply system 24 of the second embodiment. In the following description, only the points of difference in configuration from the first embodiment will be described, and the same reference numerals are used for the configurations common to the first embodiment and the description thereof is omitted.

第２実施形態の洗浄供給システム２４では、クローズドモードの洗浄水供給系列１６の洗浄水の循環に第１ポンプＰ１を用いる代わりに、軽荷喫水線ＷＬよりも上に配置される第４ポンプＰ４を使用する。清水タンク１８からの洗浄水は、第４ポンプＰ４から吐出された後、熱交換器２０において冷却され、第２ポンプＰ２を介して排ガス洗浄装置１２へと供給される。また、第２実施形態では、第１実施形態における第３ポンプＰ３を廃し、第１ポンプＰ１を洗浄水と冷却水の汲み上げに利用する。第２実施形態において、第１ポンプＰ１、第２ポンプＰ２、第４ポンプＰ４の吐出圧の比は、例えば大型タンカーでは５：５：６とされる。なお、その他の構成は第１実施形態と同様である。   In the cleaning supply system 24 of the second embodiment, instead of using the first pump P1 for circulating the cleaning water of the cleaning water supply system 16 in the closed mode, the fourth pump P4 disposed above the light load water line WL is used. use. Wash water from the fresh water tank 18 is discharged from the fourth pump P4, then cooled in the heat exchanger 20, and supplied to the exhaust gas cleaning device 12 through the second pump P2. Moreover, in 2nd Embodiment, the 3rd pump P3 in 1st Embodiment is abolished, and 1st pump P1 is utilized for pumping up washing water and cooling water. In the second embodiment, the ratio of the discharge pressures of the first pump P1, the second pump P2, and the fourth pump P4 is, for example, 5: 5: 6 in a large tanker. Other configurations are the same as those in the first embodiment.

以上のように、第２実施形態においても第１実施形態と同様の効果を得ることができる。また第２実施形態では、船底付近のデッキに設置されるポンプの台数を減らせるので、スペース上の余裕が増え、設計の自由度がより増大する。   As described above, also in the second embodiment, the same effect as in the first embodiment can be obtained. In the second embodiment, since the number of pumps installed on the deck near the ship bottom can be reduced, the space margin increases and the degree of design freedom increases.

次に図３を参照して、第３実施形態の洗浄水供給システム２６について説明する。なお図３は、第３実施形態の洗浄水供給システム２６の構成を示すブロック図である。以下の説明においては、第２実施形態とその構成が異なる点のみ説明を行ない、第２実施形態と共通する構成に関しては同一参照符号を用いるとともにその説明を省略する。   Next, a cleaning water supply system 26 according to the third embodiment will be described with reference to FIG. FIG. 3 is a block diagram showing the configuration of the cleaning water supply system 26 of the third embodiment. In the following description, only the point of difference in configuration from the second embodiment will be described, and the same reference numerals will be used for the configuration common to the second embodiment and the description thereof will be omitted.

第３実施形態の洗浄水供給システム２６は、第２実施形態における第５ポンプＰ５を廃し、第１ポンプＰ１に第５ポンプＰ５の役割を担わせている。すなわち、第１ポンプＰ１は、オープンモードで運航されるときには、オープンモードで使用される洗浄水と冷却機器２２へ供給される冷却水を汲み上げ、クローズドモードで運航されるときには熱交換器２０および冷却機器２２へ供給される冷却水を汲み上げる。すなわち、第１ポンプＰ１は、熱交換器２０以外の冷却機器（排ガス洗浄装置１２が搭載されない場合にも船舶に設置される冷却機器）にも冷却水を供給することができる。   The cleaning water supply system 26 of the third embodiment eliminates the fifth pump P5 in the second embodiment and causes the first pump P1 to play the role of the fifth pump P5. That is, when the first pump P1 is operated in the open mode, the first pump P1 pumps the washing water used in the open mode and the cooling water supplied to the cooling device 22, and when operated in the closed mode, the first pump P1 is cooled. The cooling water supplied to the device 22 is pumped up. In other words, the first pump P1 can supply cooling water to cooling devices other than the heat exchanger 20 (cooling devices installed in the ship even when the exhaust gas cleaning device 12 is not mounted).

以上のように、第３実施形態においても、第２実施形態と同様の効果を得ることができる。また第３実施形態では、第２実施形態よりも更に船底付近のデッキに設置されるポンプの台数を減らせるので、スペース上の余裕が更に増え、設計の自由度がより増大する。   As described above, also in the third embodiment, the same effects as in the second embodiment can be obtained. Further, in the third embodiment, the number of pumps installed on the deck near the ship bottom can be further reduced as compared with the second embodiment, so that a space margin is further increased and design freedom is further increased.

なお、第１実施形態の第３ポンプおよび第２実施形態の第１ポンプは、バラストポンプと兼用することが可能である。   In addition, the 3rd pump of 1st Embodiment and the 1st pump of 2nd Embodiment can be combined with a ballast pump.

１０、２４、２６ 洗浄水供給システム
１２ 排ガス洗浄装置
１４ オープンモードの洗浄水供給系列
１６ クローズドモードの洗浄水供給系列
１８ 清水タンク
２０ 熱交換器
Ｐ１〜Ｐ５ 第１〜第５ポンプ 10, 24, 26 Cleaning water supply system 12 Exhaust gas cleaning device 14 Open mode cleaning water supply system 16 Closed mode cleaning water supply system 18 Fresh water tank 20 Heat exchanger P1 to P5 First to fifth pumps

Claims (11)

船体外から取り込んだ洗浄水を排ガス洗浄装置で使用後、船体外へ排出するオープンモードの洗浄水供給系列を備える船舶用の洗浄水供給システムであって、
前記オープンモードの洗浄水供給系列は、
軽荷喫水よりも下に配置され、船体外から取り込まれた洗浄水を汲み上げる第１ポンプと、
前記軽荷喫水よりも上に配置され、前記第１ポンプにより汲み上げられた洗浄水に更に圧を加え前記排ガス洗浄装置へ送出する第２ポンプと
を備えることを特徴とする船舶用の洗浄水供給システム。 A cleaning water supply system for a ship equipped with an open mode cleaning water supply system for discharging cleaning water taken from outside the hull to the outside of the hull after being used in the exhaust gas cleaning device,
The open mode cleaning water supply line is:
A first pump arranged below the light draft and pumping up wash water taken from outside the hull;
A cleaning water supply for a ship, comprising: a second pump disposed above the light draft and further applying pressure to the cleaning water pumped up by the first pump and sending it to the exhaust gas cleaning device system. 洗浄水を循環利用するクローズドモードの洗浄水供給系列を備え、前記クローズドモードで使用される洗浄水が前記第２ポンプを通して前記排ガス洗浄装置へ供給されることを特徴とする請求項１に記載の洗浄水供給システム。   The cleaning water supply system of the closed mode that circulates and uses the cleaning water is provided, and the cleaning water used in the closed mode is supplied to the exhaust gas cleaning device through the second pump. Wash water supply system. 前記クローズドモードで使用される洗浄水を冷却するための熱交換器を備えることを特徴とする請求項２に記載の洗浄水供給システム。   The cleaning water supply system according to claim 2, further comprising a heat exchanger for cooling the cleaning water used in the closed mode. 前記クローズドモードで使用される洗浄水が、前記第１ポンプにより汲み上げられ、前記熱交換器を介して前記第２ポンプに供給されることを特徴とする請求項３に記載の洗浄水供給システム。   The cleaning water supply system according to claim 3, wherein the cleaning water used in the closed mode is pumped up by the first pump and supplied to the second pump through the heat exchanger. 前記軽荷喫水よりも下に配置され、船体外から取り込まれた冷却水を前記熱交換器に汲み上げる第３ポンプを備えることを特徴とする請求項３または請求項４に記載の洗浄水供給システム。   The cleaning water supply system according to claim 3 or 4, further comprising a third pump that is disposed below the light-load draft and pumps cooling water taken from outside the hull to the heat exchanger. . 前記クローズドモードで使用される洗浄水が、前記軽荷喫水よりも上に配置される第４ポンプにより汲み上げられ、前記熱交換器を介して前記第２ポンプに供給されることを特徴とする請求項３に記載の洗浄水供給システム。   Washing water used in the closed mode is pumped up by a fourth pump disposed above the light draft, and is supplied to the second pump through the heat exchanger. Item 4. A cleaning water supply system according to Item 3. 前記第１ポンプが前記熱交換器に供給される冷却水も汲み上げることを特徴とする請求項６に記載の洗浄水供給システム。   The cleaning water supply system according to claim 6, wherein the first pump also pumps cooling water supplied to the heat exchanger. 前記第１ポンプが、前記船舶に設備される前記熱交換器以外の冷却機器へも冷却水を供給可能であることを特徴とする請求項６に記載の洗浄水供給システム。   The cleaning water supply system according to claim 6, wherein the first pump can supply cooling water to a cooling device other than the heat exchanger installed in the ship. 前記オープンモードで使用される洗浄水の供給と、前記熱交換器で使用される冷却水の供給が択一的切り換えられる請求項６〜８の何れか一項に記載の洗浄水供給システム。   The cleaning water supply system according to any one of claims 6 to 8, wherein a supply of cleaning water used in the open mode and a supply of cooling water used in the heat exchanger are selectively switched. 前記第２ポンプが機関室に配置されることを特徴とする請求項１〜９の何れか一項に記載の洗浄水供給システム。   The cleaning water supply system according to any one of claims 1 to 9, wherein the second pump is disposed in the engine room. 請求項１〜１０の何れか一項に記載の洗浄水供給システムを備えたことを特徴とする船舶。   A ship comprising the cleaning water supply system according to any one of claims 1 to 10.
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