JP2001233292A - Underwater discharge device for exhaust gas from ship - Google Patents
Underwater discharge device for exhaust gas from shipInfo
- Publication number
- JP2001233292A JP2001233292A JP2000045801A JP2000045801A JP2001233292A JP 2001233292 A JP2001233292 A JP 2001233292A JP 2000045801 A JP2000045801 A JP 2000045801A JP 2000045801 A JP2000045801 A JP 2000045801A JP 2001233292 A JP2001233292 A JP 2001233292A
- Authority
- JP
- Japan
- Prior art keywords
- seawater
- exhaust gas
- ship
- pipe
- hull
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Landscapes
- Jet Pumps And Other Pumps (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、船舶に搭載される
内燃機関等の排ガス源から排出される排ガスを、排ガス
管を通して、海水管内を流れる海水と混合させて、この
排ガス混入海水を前記船体後部の開口から海中に放出す
るようにした、船舶における排ガスの水中排出装置に関
する。BACKGROUND OF THE INVENTION The present invention relates to a technique for mixing exhaust gas discharged from an exhaust gas source such as an internal combustion engine mounted on a ship with seawater flowing through a seawater pipe through an exhaust gas pipe. The present invention relates to an underwater discharge device for exhaust gas in a ship, which is discharged into the sea through a rear opening.
【０００２】[0002]
【従来の技術】近年、船舶に搭載されるデイーゼル機関
から排出される排ガス中の炭酸ガス（二酸化炭素）を海
水に吸収させて海中に排出する際に、該排ガス混入海水
を船体の前部近傍から放出して気泡を形成し、この気泡
で船体を包むことにより航行の摩擦抵抗を低減し、船舶
の推進効率を上昇せしめる技術が提供されてきている。
かかる技術の１つに、特開昭６２−２８６８８６号の発
明がある。この発明においては、船舶推進機関からの排
ガスを冷却装置において冷却した後、圧縮機で高圧に加
圧し、これを混合器にて水と混合させて、船体前部の噴
射ノズルから船体周りに噴射して微小気泡を形成し、該
微小気泡により船体全域を包み航行の摩擦抵抗を低減し
ている。2. Description of the Related Art In recent years, when carbon dioxide (carbon dioxide) in exhaust gas discharged from a diesel engine mounted on a ship is absorbed into seawater and discharged into the sea, the seawater mixed with the exhaust gas is located near a front portion of a hull. There has been provided a technique for reducing the frictional resistance of navigation by increasing the propulsion efficiency of a ship by forming bubbles by discharging the bubbles from the air and wrapping the hull with the bubbles.
One such technique is the invention of JP-A-62-286886. In the present invention, after cooling the exhaust gas from the ship propulsion engine in the cooling device, the compressor is pressurized to a high pressure, mixed with water by the mixer, and injected around the hull from the injection nozzle at the front of the hull. Thus, microbubbles are formed, and the microbubbles cover the entire hull to reduce the frictional resistance during navigation.
【０００３】[0003]
【発明が解決しようとする課題】排ガス中の炭酸ガスを
海水に吸収させて海中に排出する際に、該排ガス混入海
水を船体後部から放出して推進力を得る手段、あるいは
前記排ガス混入海水を船体の前部近傍から放出して気泡
を形成し、この気泡で船体を包むことにより航行の摩擦
抵抗を低減し船舶の推進力を得る手段を用いた船舶にお
いては、前記排ガス混入海水を船体後部から放出し、あ
るいは前記気泡を形成するために格別な装置を必要とせ
ず、かつ排ガスに加えるエネルギーを最少限にして、排
ガスのエネルギーを有効に利用し、船舶の推進効率を上
昇させつつ、炭酸ガスを海水に効率良く吸収させること
が要求される。When carbon dioxide gas in exhaust gas is absorbed into seawater and discharged into the sea, the seawater mixed with exhaust gas is discharged from the rear of the hull to obtain propulsion, or A ship that emits air bubbles from near the front of the hull to form bubbles, and wraps the hull with these bubbles to reduce the frictional resistance of navigation and obtain the thrust of the ship No extra equipment is required to release from or form the air bubbles, and the energy added to the exhaust gas is minimized, effectively using the energy of the exhaust gas and increasing the propulsion efficiency of the ship, It is required that gas be efficiently absorbed in seawater.
【０００４】しかるに、特開昭６２−２８６８８６号の
発明にあっては、排ガスを海水に混入させ炭酸ガスを海
水に吸収させる作用を促進するため、排ガスを冷却装置
において海水あるいは清水と熱交換させて冷却し、さら
に、この排ガスを、海面下にあって圧力の高い海水が流
れている海水管内に放出して該海水と混合させるため、
該排ガスを、圧縮機を用いて高圧に加圧している。この
ため、かかる従来技術にあっては、排ガス中の炭酸ガス
を海水に吸収させるとともに、前記排ガス混入海水によ
り船舶の推進力を得るために、熱交換器としての冷却装
置及び加圧用の圧縮機を設置するという格別な装置を必
要とし、装置が複雑化するとともに高コストとなり、排
ガスのエネルギーの利用率が低下する。However, in the invention disclosed in Japanese Patent Application Laid-Open No. 62-286886, in order to promote the action of mixing exhaust gas into seawater and absorbing carbon dioxide gas into seawater, the exhaust gas is subjected to heat exchange with seawater or fresh water in a cooling device. To cool and further discharge this exhaust gas into a seawater pipe under the sea surface where high pressure seawater is flowing and mixed with the seawater,
The exhaust gas is pressurized to a high pressure using a compressor. For this reason, in such a conventional technique, a cooling device as a heat exchanger and a compressor for pressurization are used in order to absorb carbon dioxide in exhaust gas into seawater and obtain the propulsion of a ship by the seawater mixed with exhaust gas. This requires a special device for installation of the fuel cell, which makes the device complicated and expensive, and reduces the utilization rate of exhaust gas energy.
【０００５】本発明はかかる従来技術の課題に鑑み、排
ガス中の炭酸ガスを海水に吸収させるとともに、前記排
ガス混入海水により船舶の推進力を得るにあたり、排ガ
スのエネルギー及び船舶の航行に伴うエネルギーを有効
利用することにより、格別な装置を必要とせず、簡単か
つ低コストの手段で以って、船舶の推進効率及び炭酸ガ
スの吸収効率を上昇させ得る船舶における排ガスの水中
排出装置を提供することを目的とする。In view of the problems of the prior art, the present invention absorbs the carbon dioxide gas in the exhaust gas into seawater, and uses the exhaust gas energy and the energy accompanying the navigation of the ship to obtain the propulsion of the ship by the seawater mixed with the exhaust gas. To provide an underwater exhaust gas discharge device for a ship that can increase the propulsion efficiency of the ship and the absorption efficiency of carbon dioxide gas by simple and low-cost means without using any special device by effectively utilizing it. With the goal.
【０００６】[0006]
【課題を解決するための手段】本発明はかかる課題を解
決するため、請求項１記載の発明として、船舶に搭載さ
れる内燃機関等の排ガス源から排出される排ガスを、排
ガス管を通して船体を貫通した管路から海水中に排出す
るようにした船舶において、前記船体の船尾から船首方
向に一定長さに亘り、船体中央部を船底から上方に陥没
させて船底凹部を形成するとともに該船底凹部の両側に
胴部が形成された双胴船形に構成し、船体前部の浸水部
外板に開口された海水取入口と、該海水取入口から前記
船体内を貫通され前記船底凹部に開口される海水管と、
海水管に設けられて該海水管内の海水を前記船底凹部に
開口する排水口へ向けて圧送する圧送手段とを備え、さ
らに前記海水管の圧送手段の下流部位に前記排ガス管を
合流させ、該合流部に前記海水管内の海水の通流による
ベンチュリ作用によって前記排ガス管内の排ガスを吸引
するエジェクタ装置を設けてなることを特徴とする船舶
における排ガスの水中排出装置を提案する。In order to solve the above-mentioned problems, the present invention is directed to an invention as set forth in claim 1, wherein exhaust gas discharged from an exhaust gas source such as an internal combustion engine mounted on a ship is supplied to a hull through an exhaust gas pipe. In a ship designed to be discharged into seawater from a penetrated pipe, a central portion of the hull is depressed upward from the bottom of the hull from the stern of the hull over a predetermined length to form a bottom recess, and the bottom recess is formed. A catamaran having a body formed on both sides of the ship, a seawater intake opening in a flooded portion outer plate at the front of the hull, and a seawater intake penetrating through the hull from the seawater intake and opening into the bottom recess. Seawater pipes,
Pumping means provided in the seawater pipe for pumping seawater in the seawater pipe toward a drain port opened in the bottom recess of the ship, further comprising: joining the exhaust gas pipe to a downstream portion of the pumping means of the seawater pipe; An underwater exhaust gas discharge device for a ship, wherein an ejector device that sucks exhaust gas in the exhaust gas pipe by a Venturi action by the flow of seawater in the seawater pipe at the junction is proposed.
【０００７】請求項２記載の発明は、前記圧送手段の具
体的構成に係り、請求項１において、前記圧送手段は、
回転駆動される羽根付きロータにより前記海水を圧送す
るロータリポンプからなることを特徴とする。The invention according to claim 2 relates to a specific configuration of the pumping means. In claim 1, the pumping means comprises:
It is characterized by comprising a rotary pump for pumping the seawater by a bladed rotor that is driven to rotate.
【０００８】請求項３記載の発明は、請求項１におい
て、前記海水管の前記エジェクタ装置の後流側に、該エ
ジェクタ装置にて排ガスと混合された海水を整流して前
記船底凹部の開口に送るデイフューザを設けたことを特
徴とする。According to a third aspect of the present invention, in the first aspect, the seawater mixed with the exhaust gas is rectified by the ejector device on the downstream side of the ejector device of the seawater pipe, and the seawater is rectified into the opening of the concave portion at the bottom of the ship. It is characterized by providing a diffuser to send.
【０００９】請求項４ないし５記載の発明は、排ガスの
水中排出装置の配置構造に係り、請求項４記載の発明
は、請求項１において、前記海水取入口及びこれに接続
される海水管を前記船体の幅方向に複数設けるととも
に、各海水管に前記エジェクタ装置を設け、各エジェク
タ装置に前記排ガス管を接続したことを特徴とする。The invention according to claims 4 and 5 relates to an arrangement of an underwater exhaust gas discharging device. The invention according to claim 4 is the invention according to claim 1, wherein the seawater intake and the seawater pipe connected thereto are connected to each other. A plurality of the hulls are provided in the width direction, the ejector device is provided in each seawater pipe, and the exhaust gas pipe is connected to each ejector device.
【００１０】請求項５記載の発明は、請求項１におい
て、前記両側の胴部に、船舶の推進機関により駆動され
るプロペラ軸を貫設して、前記船底凹部の排水口の両側
に前記プロペラ軸に連結されたプロペラを配置したこと
を特徴とする。According to a fifth aspect of the present invention, in the first aspect, a propeller shaft driven by a propulsion engine of a ship is provided through the body portions on both sides, and the propeller shafts are provided on both sides of a drain port of the bottom recess. A propeller connected to the shaft is arranged.
【００１１】かかる発明によれば、排ガスをエジェクタ
装置にて負圧に圧力低下した海水流中にベンチュリ作用
によって吸引せしめるので、該排ガスを容易に微細気泡
化して海水と接触させることができ、排ガス中の炭酸ガ
スを効率良く海水中に溶解させることができる。また、
エジェクタ装置にて負圧に圧力低下した海水流中に排ガ
スを吸引させるので、排ガスを、エンジン等の排ガス源
から排出された圧力状態のままで、圧縮機等で加圧する
ことなく、容易に海水中に混入させることができる。こ
れにより、従来技術のように、排ガスを海水中に溶解さ
せるのに、圧縮機等のような格別な動力や装置を必要と
せず、簡単かつ低コストの手段で以って船舶の推進効率
を上昇させることができる。According to this invention, the exhaust gas is sucked into the seawater stream whose pressure has been reduced to a negative pressure by the ejector device by the Venturi action, so that the exhaust gas can be easily made into fine bubbles and contacted with the seawater. Carbon dioxide in the water can be efficiently dissolved in seawater. Also,
Since the exhaust gas is sucked into the seawater stream whose pressure has been reduced to a negative pressure by the ejector device, the exhaust gas is easily discharged from the seawater without being pressurized by a compressor or the like in the pressure state discharged from an exhaust gas source such as an engine. It can be mixed in. This eliminates the need for special power and equipment such as compressors to dissolve exhaust gas into seawater as in the prior art, and improves the propulsion efficiency of ships using simple and low-cost means. Can be raised.
【００１２】また、かかる発明によれば、海水をロータ
リポンプ等よりなる圧送手段によって加圧、増速して前
記エジェクタ装置に送るので、該エジェクタ装置におけ
る海水流速が高速化され圧力低下が大きくなって、排ガ
スの吸引作用が増大し、排ガスを高効率で以って吸引で
き、海水中での排ガスの微細気泡化が促進され、排ガス
混入海水の見かけ容積が取り入れ海水よりも大きくなっ
て、船舶の航行速度よりも大きな速度で後方へ噴出させ
ることができる。According to the invention, seawater is pressurized and accelerated by the pumping means such as a rotary pump and sent to the ejector device, so that the seawater flow velocity in the ejector device is increased and the pressure drop is increased. As a result, the exhaust gas suction action is increased, the exhaust gas can be sucked with high efficiency, the fine gas generation of the exhaust gas in the seawater is promoted, and the apparent volume of the seawater mixed with the exhaust gas becomes larger than that of the seawater. Can be jetted backward at a speed greater than the sailing speed of the ship.
【００１３】殊にかかる発明においては、排ガス混入海
水の排水口を船底凹部に開口しているので、前記エジェ
クタ装置にて排ガスと海水とを接触させることにより微
細気泡を含んだ海水を船底凹部の外板に沿って流すこと
ができ、船底の周りに前記微細気泡を保持し易くなる。
これにより、前記のような、排ガス混入海水の見かけ容
積の増大効果が大きくなる。これにより、前記排ガス混
入海水の噴出による船舶推進動力の増大が実現できる。
また、前記海水中での排ガスの微細気泡化が促進された
排ガス混入海水を、請求項３に係るデイフューザによっ
て整流して、船底凹部に開口された排水口から該船底凹
部に噴出するため、前記のように、船底の周りに前記微
細気泡を保持し易くなり、これにより、該排ガス混入海
水中の微細気泡による船体の摩擦抵抗の低減効果が増大
する。以上により、船舶の推進効率が上昇する。In the invention of the present invention, the seawater containing fine bubbles is discharged from the bottom of the ship by contacting the exhaust gas with the seawater by the ejector device. It can flow along the outer plate, and it becomes easier to hold the fine bubbles around the bottom of the ship.
Thereby, the effect of increasing the apparent volume of seawater mixed with exhaust gas as described above is increased. This makes it possible to increase the propulsion power of the ship due to the ejection of the seawater mixed with the exhaust gas.
Further, in order to rectify the exhaust gas-containing seawater in which the generation of fine bubbles of the exhaust gas in the seawater is promoted by the diffuser according to claim 3, and to jet the seawater into the ship bottom recess from the drain port opened in the ship bottom recess, As described above, it becomes easier to hold the fine bubbles around the bottom of the ship, thereby increasing the effect of reducing the frictional resistance of the hull by the fine bubbles in the seawater mixed with the exhaust gas. Thus, the propulsion efficiency of the ship increases.
【００１４】さらに、請求項４ないし５記載の発明によ
れば、前記海水取入口及びこれに接続される海水管を前
記船体の幅方向に複数組設け、各海水管に前記ロータリ
ポンプ等の圧送手段及びエジェクタ装置を設け、各エジ
ェクタ装置に前記排ガス管を接続し、前記海水取入口、
海水管、圧送手段及びエジェクタ装置からなる排ガス噴
出装置を、前記船舶推進用のエンジンにより駆動される
プロペラ軸に並設することにより、該プロペラ軸の推進
動力に前記排ガス混入海水の噴出による推進動力が重畳
され、さらなる推進効率の上昇が得られる。According to the fourth and fifth aspects of the present invention, a plurality of sets of the seawater inlet and seawater pipes connected to the seawater inlet are provided in the width direction of the hull, and the seawater pipe is pumped by the rotary pump or the like. Means and an ejector device, the exhaust gas pipe is connected to each ejector device, the seawater intake,
By disposing an exhaust gas ejection device comprising a seawater pipe, a pumping means, and an ejector device in parallel with a propeller shaft driven by the ship propulsion engine, the propulsion power of the propeller shaft is increased by the emission of seawater mixed with the exhaust gas. Are superimposed, and a further increase in propulsion efficiency is obtained.
【００１５】[0015]
【発明の実施の形態】以下、本発明を図に示した実施例
を用いて詳細に説明する。但し、この実施例に記載され
ている構成部品の寸法、材質、形状、その相対配置など
は特に特定的な記載がない限り、この発明の範囲をそれ
のみに限定する趣旨ではなく、単なる説明例にすぎな
い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. It's just
【００１６】図１は本発明の実施形態に係る船舶におけ
る排ガスの水中排出装置の配置構造を示す側面図、図２
は図１のＡ―Ａ矢視図、図３は図１のＢ矢視図、図４は
ロータリポンプ及びエジェクタ装着部の縦断面図であ
る。FIG. 1 is a side view showing an arrangement structure of an underwater exhaust gas discharge device in a ship according to an embodiment of the present invention.
1 is a view taken in the direction of arrows AA in FIG. 1, FIG. 3 is a view taken in the direction of arrows B in FIG. 1, and FIG. 4 is a longitudinal sectional view of the rotary pump and the ejector mounting portion.
【００１７】本発明に係る船舶における排ガスの水中排
出装置の配置構造を示す図１ないし図３において、１は
船舶の船体、２は該船体の船底である。該船体１は、こ
れの船尾から船首方向に一定長さに亘って、船体中央部
を船底２から上方に陥没させて船底凹部０２を形成する
とともに、該船底凹部０２の両側に胴部０１、０１を形
成してなる双胴船形に構成されている。４は船体１の中
央部あるいは前部寄りの部位に設置されたデイーゼル機
関（以下エンジンという）で、図２に示すように、前記
胴部０１、０１内、あるいは該胴部０１、０１の前方両
側に２台設置されている（１台あるいは３台以上でも良
い）。８は前記エンジン４の出力軸に連結されるプロペ
ラ軸、３は該エンジン４の排ガスを排出するための排ガ
ス管である。また１００は海面である。前記各エンジン
４からの排ガス管３は、該エンジン４から船体１内を船
首方向に延び、後述するエジェクタ３０に接続されてい
る。１１は海水管で、これの海水取入口１０は前記船体
前部の浸水部外板に開口されている。該海水管１１は前
記海水取入口１０から船尾方向に延設され、その途中
に、後述するロータリポンプ２０、エジェクタ３０、デ
イフューザ１２等が設けられ、前記船底凹部０２に設け
られた排水口１３に開口している。1 to 3 showing the arrangement of an underwater exhaust gas discharging device in a ship according to the present invention, reference numeral 1 denotes a hull of the ship, and 2 denotes a bottom of the hull. The hull 1 has a central portion of the hull depressed upward from the bottom 2 over a certain length from the stern to the bow direction to form a bottom concave portion 02, and body portions 01 on both sides of the bottom concave portion 02. 01 is formed in a catamaran shape. Reference numeral 4 denotes a diesel engine (hereinafter referred to as an engine) installed at a central portion or a portion near the front of the hull 1, as shown in FIG. 2, inside the body portions 01, 01 or in front of the body portions 01, 01. Two units are installed on both sides (one or three or more units may be used). Reference numeral 8 denotes a propeller shaft connected to the output shaft of the engine 4, and reference numeral 3 denotes an exhaust gas pipe for discharging exhaust gas of the engine 4. 100 is the sea surface. The exhaust gas pipes 3 from the engines 4 extend in the bow direction from the engines 4 in the hull 1 and are connected to an ejector 30 described later. Reference numeral 11 denotes a seawater pipe, and a seawater inlet 10 of the seawater pipe is opened in a flooded portion outer plate at the front of the hull. The seawater pipe 11 extends in the stern direction from the seawater inlet 10, and a rotary pump 20, an ejector 30, a diffuser 12, and the like, which will be described later, are provided in the middle thereof. It is open.
【００１８】この実施例においては、前記のように、前
記エンジン４は両側の前記胴部０１、０１内に各１台設
置され、排ガス管３は各エンジン４から船首方向に延設
され、その内側に配置された前記エジェクタ３０に接続
されている。一方前記海水管１１は、前記船体１の幅方
向において、前記排ガス管３の内側でかつ前記船底凹部
０２に開口するように配置され、夫々に前記ロータリポ
ンプ２０、エジェクタ３０、デイフューザ１２等が設け
られている。該海水管１１はは１個、あるいは３個以上
設けても良い。In this embodiment, as described above, one engine 4 is installed in each of the body portions 01, 01 on both sides, and the exhaust gas pipe 3 extends from each engine 4 in the bow direction. It is connected to the ejector 30 arranged inside. On the other hand, the seawater pipe 11 is disposed in the width direction of the hull 1 so as to open inside the exhaust gas pipe 3 and open to the bottom recessed part 02, and the rotary pump 20, the ejector 30, the diffuser 12 and the like are provided respectively. Have been. One or three or more seawater pipes 11 may be provided.
【００１９】前記ロータリポンプ及びエジェクタ装着部
の詳細を示す図４において、２０はロータリポンプで次
のように構成されている。２１はロータで、外周に複数
の羽根２２が円周方向等間隔に固設されている。２４は
該ロータ２１の最外周部に固定された従動歯車、２３は
該従動歯車２４に噛み合う駆動歯車で駆動軸２７に固定
されている。該駆動軸２７は電動モータ（図示省略）あ
るいは前記エンジン４に連結されて、回転駆動されてい
る。２５は前記ロータ２１をケース０２０に軸支する軸
受、２６は前記駆動軸２７をケース０２０に軸支する軸
受である。また、前記海水管１１の外周と前記ケース０
２０との間にはシール部材２８が介装されて、海水のシ
ールを行っている。In FIG. 4 showing details of the rotary pump and the ejector mounting portion, reference numeral 20 denotes a rotary pump which is configured as follows. Reference numeral 21 denotes a rotor, on the outer periphery of which a plurality of blades 22 are fixed at equal intervals in the circumferential direction. Reference numeral 24 denotes a driven gear fixed to the outermost peripheral portion of the rotor 21, and reference numeral 23 denotes a drive gear that meshes with the driven gear 24 and is fixed to a drive shaft 27. The drive shaft 27 is connected to an electric motor (not shown) or the engine 4 and is driven to rotate. Reference numeral 25 denotes a bearing that supports the rotor 21 on the case 020, and reference numeral 26 denotes a bearing that supports the drive shaft 27 on the case 020. The outer circumference of the seawater pipe 11 and the case 0
A seal member 28 is interposed between the seal member 20 and the seal member 20 to seal seawater.
【００２０】３０はエジェクタで、その中心部に前記海
水管１１の端部が縮径されたノズル部３１が開口し、外
周部の環状空間０３０に前記排ガス管３が開口してい
る。１２は前記エジェクタ３０の下流側に設けられたデ
イフューザで、前記エジェクタ３０の出口から徐々に通
路面積が拡大されて、排水口１３に接続されている。Numeral 30 denotes an ejector. A nozzle portion 31 having a reduced diameter at an end of the seawater pipe 11 is opened at the center of the ejector, and the exhaust gas pipe 3 is opened at an annular space 030 at an outer peripheral portion. Reference numeral 12 denotes a diffuser provided on the downstream side of the ejector 30. The diffuser 12 has a passage area gradually enlarged from an outlet of the ejector 30 and is connected to a drain 13.
【００２１】かかる構成からなる排ガスの水中排出装置
を備えた船舶の航行時において、前記各エンジン４から
の排ガスは排ガス管３に入り、該排ガス管３からエジェ
クタ３０の環状空間０３０に入る。一方、船舶の航行に
伴うスクープ作用により、海水が船首の海水取入口１０
から海水管１１に導入されて、前記ロータリポンプ２０
に送られる。該ロータリポンプ２０においては、電動モ
ータ等の駆動源により駆動軸２７、駆動歯車２３、及び
従動歯車２４を介してロータ２１が回転駆動され、前記
海水管１１を通流してきた海水を加圧、増速し、前記エ
ジェクタ３０のノズル部３１に送る。During the navigation of a ship equipped with the underwater exhaust gas discharging device having such a configuration, the exhaust gas from each of the engines 4 enters the exhaust gas pipe 3 and enters the annular space 030 of the ejector 30 from the exhaust gas pipe 3. On the other hand, due to the scoop effect accompanying the navigation of the ship, the seawater is supplied to the seawater inlet 10 at the bow.
From the rotary pump 20
Sent to In the rotary pump 20, the rotor 21 is rotationally driven by a driving source such as an electric motor via a driving shaft 27, a driving gear 23, and a driven gear 24, and pressurizes seawater flowing through the seawater pipe 11. The speed is increased and sent to the nozzle 31 of the ejector 30.
【００２２】該ノズル部３１においては、通路面積が絞
られるとともに、海水が前記ロータリポンプ２０によっ
て加圧されているため、該海水が高速で下流のデイフュ
ーザ１２側に向けて噴出せしめられる。かかるノズル部
３１からの海水の高速噴出により、該ノズル部３１の周
囲に形成された環状空間０３０内の圧力が負圧まで低下
し、この圧力低下によるベンチュリ作用によって、前記
排ガス管３から環状空間０３０内に導入されている排ガ
スは、図４の矢印のように高速で吸引されて海水と混合
せしめられる。そして、前記排ガス混入海水は、前記デ
イフューザ１２に送られ、該デイフューザ１２にて整流
されるとともに圧力が回復されて、排水口１３から船底
凹部０２に噴出される。In the nozzle section 31, since the passage area is reduced and the seawater is pressurized by the rotary pump 20, the seawater is spouted at high speed toward the downstream diffuser 12 side. Due to the high-speed ejection of seawater from the nozzle portion 31, the pressure in the annular space 030 formed around the nozzle portion 31 is reduced to a negative pressure. The exhaust gas introduced into 030 is sucked at a high speed as shown by the arrow in FIG. 4 and mixed with seawater. Then, the seawater mixed with the exhaust gas is sent to the diffuser 12, where the seawater is rectified by the diffuser 12, the pressure is restored, and the seawater is ejected from the drain port 13 to the ship bottom recess 02.
【００２３】前記エジェクタ３０において、排ガスは、
前記ベンチュリ作用によって海水中に吸引される際に微
細気泡にされて海水と効率良く接触し、該排ガス中の炭
酸ガスは海水中に確実に溶解せしめられる。即ちかかる
実施例によれば、排ガスをエジェクタ３０にて負圧に圧
力低下した海水流中にベンチュリ作用によって吸引せし
めるので、排ガスを容易に微細気泡化して海水と接触さ
せることができ、排ガス中の炭酸ガスを効率良く海水中
に溶解させることができる。また、エジェクタ３０にて
負圧に圧力低下した海水流中に排ガスを吸引させるの
で、排ガスを、エンジン４から排出された圧力状態のま
まで、圧縮機等で加圧することなく、容易に海水中に混
入させることができる。In the ejector 30, the exhaust gas is
When sucked into seawater by the Venturi effect, it is formed into fine bubbles and comes into contact with seawater efficiently, so that carbon dioxide gas in the exhaust gas is surely dissolved in seawater. In other words, according to this embodiment, the exhaust gas is sucked into the seawater stream whose pressure has been reduced to a negative pressure by the ejector 30 by the Venturi action, so that the exhaust gas can be easily microbubbled and brought into contact with the seawater. Carbon dioxide can be efficiently dissolved in seawater. Further, since the exhaust gas is sucked into the seawater stream whose pressure has been reduced to the negative pressure by the ejector 30, the exhaust gas is easily discharged in the seawater without being pressurized by a compressor or the like in the pressure state discharged from the engine 4. Can be mixed.
【００２４】また、かかる実施例によれば、海水をスク
ープ作用により、海水を船首に設けられた海水取入口１
０から導入するので、大きなスクープ作用が得られて海
水の流速増大が可能となる。そして、かかる高速化され
た海水を、前記ロータリポンプ２０によって加圧、増速
して前記エジェクタ３０に送るので、該エジェクタ３０
における海水流速が高速化され圧力低下が大きくなっ
て、排ガスの吸引作用が増大し、排ガスを高効率で以っ
て吸引でき、海水中での排ガスの微細気泡化が促進さ
れ、排ガス混入海水の見かけ容積が取り入れ海水よりも
大きくなって、船舶の航行速度よりも大きな速度で後方
へ噴出させることができる。これにより、前記排ガス混
入海水の噴出による船舶推進動力の増大が実現できる。According to this embodiment, the seawater is scooped, and the seawater is supplied to the seawater inlet 1 provided at the bow.
Since the introduction is started from 0, a large scoop action is obtained and the flow velocity of seawater can be increased. Then, the accelerated seawater is pressurized and accelerated by the rotary pump 20 and sent to the ejector 30, so that the ejector 30
Seawater flow velocity is increased and the pressure drop is increased, the exhaust gas suction action is increased, the exhaust gas can be sucked with high efficiency, and the generation of fine bubbles of the exhaust gas in the seawater is promoted. The apparent volume is larger than the intake seawater, and it can be jetted backward at a speed greater than the speed of the ship. This makes it possible to increase the propulsion power of the ship due to the ejection of the seawater mixed with the exhaust gas.
【００２５】殊にかかる実施例においては、排ガス混入
海水の排水口１３を船底凹部０２に開口しているので、
前記エジェクタ３０にて排ガスと海水とを接触させるこ
とにより微細気泡を含んだ海水を前記船底凹部０２の外
板に沿って流すことができ、船底２の周りに前記微細気
泡を保持し易くなる。これにより、前記のような、排ガ
ス混入海水の見かけ容積の増大効果が大きくなる。In particular, in this embodiment, since the seawater-contaminated seawater discharge port 13 is opened in the bottom recess 02,
By contacting the exhaust gas and seawater with the ejector 30, seawater containing fine bubbles can flow along the outer plate of the ship bottom concave portion 02, and the fine bubbles can be easily held around the ship bottom 2. Thereby, the effect of increasing the apparent volume of seawater mixed with exhaust gas as described above is increased.
【００２６】また、前記海水中での排ガスの微細気泡化
が促進された排ガス混入海水を、デイフューザ１２によ
って整流して、船底凹部０２に開口された排水口１３か
ら該船底凹部０２に噴出するため、前記のように、船底
２の周りに前記微細気泡を保持し易くなり、これによ
り、該排ガス混入海水中の微細気泡による船体１の摩擦
抵抗の低減効果が増大する。Further, the seawater mixed with exhaust gas, in which the generation of fine gas of the exhaust gas in the seawater is promoted, is rectified by the diffuser 12 and ejected from the drain port 13 opened in the bottom recess 02 to the bottom recess 02. As described above, it becomes easier to hold the fine air bubbles around the bottom 2 of the ship, thereby increasing the effect of reducing the frictional resistance of the hull 1 due to the fine air bubbles in the seawater mixed with the exhaust gas.
【００２７】また、かかる実施例によれば、前記海水取
入口１０及びこれに接続される海水管１１、１１を前記
船体１の幅方向に２組（複数組であれば良い）設け、各
海水管１１、１１に前記ロータリポンプ２０、２０及び
エジェクタ３０、３０を設け、各エジェクタ３０、３０
に前記排ガス管３を接続し、前記海水取入口１０、海水
管１１、ロータリポンプ２０及びエジェクタ３０からな
る２組（複数組であれば良い）の排ガス噴出装置を、前
記船舶推進用のエンジン４により駆動され両側胴部０１
に設けられたプロペラ軸８の内側に並設することによ
り、該プロペラ軸８の推進動力に前記排ガス混入海水の
噴出による推進動力が重畳され、さらなる推進効率の上
昇が得られる。According to this embodiment, the seawater inlet 10 and the seawater pipes 11 connected to the seawater inlet 10 are provided in two sets in the width direction of the hull 1 (a plurality of sets are required). The water pipes 11, 11 are provided with the rotary pumps 20, 20, and the ejectors 30, 30, and each ejector 30, 30,
The exhaust gas pipe 3 is connected to the marine vessel propulsion engine 4 and the seawater intake port 10, the seawater pipe 11, the rotary pump 20, and the ejector 30. Driven by both sides trunk 01
Are arranged side by side inside the propeller shaft 8 provided in the above, the propulsion power by the jet of the seawater mixed with the exhaust gas is superimposed on the propulsion power of the propeller shaft 8, thereby further increasing the propulsion efficiency.
【００２８】[0028]
【発明の効果】以上記載の如く本発明によれば、エジェ
クタ装置にて負圧に圧力低下した海水流中に排ガスを吸
引させるので、排ガスを、排ガス源から排出された圧力
状態のままで、圧縮機等で加圧することなく、容易に海
水中に混入させることができる。これにより、従来技術
のように、排ガスを海水中に溶解させるのに、圧縮機等
のような格別な動力や装置を必要とせず、簡単かつ低コ
ストの手段で以って船舶の推進効率を上昇させることが
できる。As described above, according to the present invention, since the exhaust gas is sucked into the seawater stream whose pressure has been reduced to a negative pressure by the ejector device, the exhaust gas is kept in a pressure state discharged from the exhaust gas source. It can be easily mixed into seawater without pressurizing with a compressor or the like. This eliminates the need for special power and equipment such as compressors to dissolve exhaust gas into seawater as in the prior art, and improves the propulsion efficiency of ships using simple and low-cost means. Can be raised.
【００２９】また、本発明によれば、海水を加圧手段に
よって加圧、増速して前記エジェクタ装置に送るので、
該エジェクタ装置における排ガスの吸引作用が増大し、
排ガスを高効率で以って吸引でき、海水中での排ガスの
微細気泡化が促進され、排ガス混入海水の見かけ容積が
取り入れ海水よりも大きくなって、船舶の航行速度より
も大きな速度で後方へ噴出させることができる。これに
より、前記排ガス混入海水の噴出による船舶推進動力の
増大が実現できる。加えて、本発明においては、排ガス
混入海水の排水口を船底凹部に開口しているので、前記
エジェクタ装置からの微細気泡を含んだ海水を船底凹部
の外板に沿って流すことができ、船底の周りに前記微細
気泡を保持し易くなる。これにより、前記のような、排
ガス混入海水の見かけ容積の増大効果が大きくなり、さ
らなる船舶推進動力の増大が得られる。以上により、前
記排ガス混入海水の噴出による船舶推進動力の増大が実
現できる。また、前記海水中での排ガスの微細気泡化が
促進され、前記のような船底凹部における船底周りの微
細気泡を保持作用により、請求項３に係るデイフューザ
によって整流され、排水口から船底凹部に噴出される排
ガス混入海水中の微細気泡による船体の摩擦抵抗の低減
効果が増大する。Further, according to the present invention, since seawater is pressurized and accelerated by the pressurizing means and sent to the ejector device,
Exhaust gas suction action in the ejector device increases,
Exhaust gas can be suctioned with high efficiency, and the formation of fine bubbles in the exhaust gas in seawater is promoted, the apparent volume of seawater mixed with exhaust gas becomes larger than that of seawater, and the ship moves backward at a speed greater than the speed of the ship. Can be squirted. This makes it possible to increase the propulsion power of the ship due to the ejection of the seawater mixed with the exhaust gas. In addition, in the present invention, since the discharge port of the seawater mixed with the exhaust gas is opened in the bottom recess of the ship, the seawater containing fine bubbles from the ejector device can flow along the outer plate of the bottom recess of the ship, , It becomes easier to hold the microbubbles around. As a result, the effect of increasing the apparent volume of the seawater mixed with the exhaust gas as described above is increased, and the marine vessel propulsion power is further increased. As described above, it is possible to increase the marine vessel propulsion power by the emission of the seawater mixed with the exhaust gas. Further, the generation of fine bubbles of the exhaust gas in the seawater is promoted, and the fine bubbles around the ship bottom in the ship bottom concave portion are straightened by the diffuser according to claim 3 by a holding action, and are ejected from the drain port to the ship bottom concave portion. The effect of reducing the frictional resistance of the hull due to the fine bubbles in the seawater mixed with the exhaust gas increases.
【００３０】さらに、排ガスをエジェクタ装置にて負圧
に圧力低下した海水流中にベンチュリ作用によって吸引
せしめるので、該排ガスを容易に微細気泡化して海水と
接触させることができ、排ガス中の炭酸ガスを効率良く
海水中に溶解させることができる。Further, since the exhaust gas is sucked into the seawater stream whose pressure has been reduced to a negative pressure by the ejector device by the Venturi action, the exhaust gas can be easily made into fine bubbles and brought into contact with the seawater, and the carbon dioxide gas in the exhaust gas can be brought into contact. Can be efficiently dissolved in seawater.
【００３１】請求項４乃至５のように構成すれば、前記
海水取入口及びこれに接続される海水管を前記船体の幅
方向に複数組設け、各海水管に前記ロータリポンプ等の
圧送手段及びエジェクタ装置を設け、各エジェクタ装置
に前記排ガス管を接続し、前記海水取入口、海水管、圧
送手段及びエジェクタ装置からなる排ガス噴出装置を、
前記船舶推進用のエンジンにより駆動されるプロペラ軸
に並設することにより、該プロペラ軸の推進動力に前記
排ガス混入海水の噴出による推進動力が重畳され、さら
なる推進効率の上昇が得られる。According to a fourth aspect of the present invention, a plurality of sets of the seawater inlet and seawater pipes connected to the seawater inlet are provided in the width direction of the hull. An ejector device is provided, the exhaust gas pipe is connected to each ejector device, and the seawater intake, a seawater pipe, an exhaust gas ejection device including a pumping means and an ejector device,
By being juxtaposed to the propeller shaft driven by the ship propulsion engine, the propulsion power of the exhaust gas-mixed seawater is superimposed on the propulsion power of the propeller shaft, thereby further increasing the propulsion efficiency.
【００３２】以上、要するに本発明によれば、排ガスの
エネルギー及び船舶の航行に伴うエネルギーを有効利用
することにより、格別な動力や装置を必要とせず、簡単
かつ低コストの手段で以って船舶の推進効率を上昇させ
得るとともに、排ガス中の炭酸ガスを効率良く海水中に
溶解させることができる。In summary, according to the present invention, by effectively utilizing the energy of the exhaust gas and the energy involved in the navigation of the ship, no special power or equipment is required and the ship can be easily and inexpensively manufactured. And the carbon dioxide in the exhaust gas can be efficiently dissolved in seawater.
【図１】 本発明の実施形態に係る船舶における排ガス
の水中排出装置の配置構造を示す側面図である。FIG. 1 is a side view showing an arrangement structure of an underwater exhaust gas discharge device in a ship according to an embodiment of the present invention.
【図２】 図１のＡ―Ａ矢視図である。FIG. 2 is a view taken along the line AA of FIG. 1;
【図３】 図１のＢ矢視図である。FIG. 3 is a view taken in the direction of arrow B in FIG. 1;
【図４】 ロータリポンプ及びエジェクタ装着部の縦断
面図である。FIG. 4 is a longitudinal sectional view of a rotary pump and an ejector mounting portion.
１ 船体 ０１ 胴部 ２ 船底 ０２ 船底凹部 ３ 排ガス管 ４ エンジン ８ プロペラ軸 １０ 海水取入口 １１ 海水管 １２ デイフューザ １３ 排水口 ２０ ロータリポンプ ２１ ロータ ２２ 羽根 ２３ 駆動歯車 ２４ 従動歯車 ２７ 駆動軸 ３０ エジェクタ ０３０ 環状空間 ３１ ノズル部 DESCRIPTION OF SYMBOLS 1 Hull 01 Body 2 Ship bottom 02 Ship bottom concave part 3 Exhaust gas pipe 4 Engine 8 Propeller shaft 10 Sea water intake 11 Sea water pipe 12 Diffuser 13 Drainage port 20 Rotary pump 21 Rotor 22 Blade 23 Drive gear 24 Follower gear 27 Drive shaft 30 Space 31 Nozzle
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ０４Ｆ 5/46 Ｆ０４Ｆ 5/54 5/54 Ｂ０１Ｄ 53/34 １３５Ｚ Ｆターム(参考） 3H079 AA14 AA23 AA28 BB10 CC03 CC21 DD02 DD03 DD16 DD23 DD24 4D002 AA09 AC10 BA02 CA06 HA08──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F04F 5/46 F04F 5/54 5/54 B01D 53/34 135Z F-term (Reference) 3H079 AA14 AA23 AA28 BB10 CC03 CC21 DD02 DD03 DD16 DD23 DD24 4D002 AA09 AC10 BA02 CA06 HA08
Claims (5)
から排出される排ガスを、排ガス管を通して船体を貫通
した管路から海水中に排出するようにした船舶におい
て、前記船体の船尾から船首方向に一定長さに亘り、船
体中央部を船底から上方に陥没させて船底凹部を形成す
るとともに該船底凹部の両側に胴部が形成された双胴船
形に構成し、船体前部の浸水部外板に開口された海水取
入口と、該海水取入口から前記船体内を貫通され前記船
底凹部に開口される海水管と、海水管に設けられて該海
水管内の海水を前記船底凹部に開口する排水口へ向けて
圧送する圧送手段とを備え、さらに前記海水管の圧送手
段の下流部位に前記排ガス管を合流させ、該合流部に前
記海水管内の海水の通流によるベンチュリ作用によって
前記排ガス管内の排ガスを吸引するエジェクタ装置を設
けてなることを特徴とする船舶における排ガスの水中排
出装置。1. A ship configured to discharge exhaust gas discharged from an exhaust gas source such as an internal combustion engine mounted on a ship into seawater through a pipe penetrating the hull through an exhaust gas pipe. The center part of the hull is depressed upward from the bottom of the hull over a certain length in the direction to form a bottom concave part, and the catamaran is formed in a catamaran shape in which the trunk part is formed on both sides of the bottom concave part. A seawater inlet opening to the outer panel, a seawater pipe penetrating through the hull from the seawater inlet and opening to the bottom recess, and a seawater provided in the seawater pipe and opening the seawater in the seawater pipe to the bottom recess. Pumping means for pumping the wastewater to a discharge port to be discharged.The exhaust gas pipe is further joined to a downstream portion of the pumping means of the seawater pipe, and the exhaust gas is ventilated by the Venturi action by the flow of seawater in the seawater pipe at the junction. Exhaust gas in pipe Water discharge device for the exhaust gas in the vessel characterized by comprising providing an ejector device for sucking.
きロータにより前記海水を圧送するロータリポンプから
なることを特徴とする請求項１記載の船舶における排ガ
スの水中排出装置。2. The underwater exhaust gas discharge system for a ship according to claim 1, wherein said pumping means comprises a rotary pump for pumping said seawater by means of a bladed rotor which is rotationally driven.
側に、該エジェクタ装置にて排ガスと混合された海水を
整流して前記船底凹部の開口に送るデイフューザを設け
たことを特徴とする請求項１記載の船舶における排ガス
の水中排出装置。3. A diffuser is provided on a downstream side of the ejector device of the seawater pipe, and a diffuser for rectifying seawater mixed with exhaust gas by the ejector device and sending the rectified seawater to the opening of the bottom recess is provided. Item 2. An underwater discharge device for exhaust gas in a ship according to Item 1.
水管を前記船体の幅方向に複数設けるとともに、各海水
管に前記エジェクタ装置を設け、各エジェクタ装置に前
記排ガス管を接続したことを特徴とする請求項１記載の
船舶における排ガスの水中排出装置。4. A method in which a plurality of the seawater inlets and seawater pipes connected to the seawater inlet are provided in a width direction of the hull, the ejector device is provided in each seawater tube, and the exhaust gas pipe is connected to each ejector device. The underwater discharge device for exhaust gas in a ship according to claim 1, wherein:
り駆動されるプロペラ軸を貫設して、前記船底凹部の排
水口の両側に前記プロペラ軸に連結されたプロペラを配
置したことを特徴とする請求項１記載の船舶における排
ガスの水中排出装置。5. A propeller shaft driven by a propulsion engine of a ship penetrating through the body portions on both sides, and propellers connected to the propeller shaft are arranged on both sides of a drain port of the bottom recess. The underwater discharge device for exhaust gas in a ship according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000045801A JP2001233292A (en) | 2000-02-23 | 2000-02-23 | Underwater discharge device for exhaust gas from ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000045801A JP2001233292A (en) | 2000-02-23 | 2000-02-23 | Underwater discharge device for exhaust gas from ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001233292A true JP2001233292A (en) | 2001-08-28 |
Family
ID=18568332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000045801A Withdrawn JP2001233292A (en) | 2000-02-23 | 2000-02-23 | Underwater discharge device for exhaust gas from ship |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001233292A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008100206A (en) * | 2006-10-17 | 2008-05-01 | Kishio Saito | Carbon dioxide reduction device |
| GB2469320A (en) * | 2009-04-08 | 2010-10-13 | Krystallon Ltd | A marine vessel having a fluid discharge pipe and means for promoting mixing of discharge |
| CN102849195A (en) * | 2012-09-18 | 2013-01-02 | 南通中远川崎船舶工程有限公司 | Guide pipe device for stem |
| CN109395586A (en) * | 2018-12-13 | 2019-03-01 | 大连海事大学 | A kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas |
| KR102005186B1 (en) * | 2018-04-23 | 2019-07-29 | 목포해양대학교 산학협력단 | Friction Resistance Reduction Apparatus using Exhaust Gas and Stepped Hull Vessel having the Same |
| CN110758633A (en) * | 2019-10-30 | 2020-02-07 | 西安交通大学 | Venturi system for reducing resistance of hull bubbles |
| JP2022547488A (en) * | 2019-12-28 | 2022-11-14 | 天津市華諾通信工程有限公司 | Method and device for reducing wave-making resistance and frictional resistance during navigation of a ship |
-
2000
- 2000-02-23 JP JP2000045801A patent/JP2001233292A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008100206A (en) * | 2006-10-17 | 2008-05-01 | Kishio Saito | Carbon dioxide reduction device |
| GB2469320A (en) * | 2009-04-08 | 2010-10-13 | Krystallon Ltd | A marine vessel having a fluid discharge pipe and means for promoting mixing of discharge |
| CN102849195A (en) * | 2012-09-18 | 2013-01-02 | 南通中远川崎船舶工程有限公司 | Guide pipe device for stem |
| KR102005186B1 (en) * | 2018-04-23 | 2019-07-29 | 목포해양대학교 산학협력단 | Friction Resistance Reduction Apparatus using Exhaust Gas and Stepped Hull Vessel having the Same |
| CN109395586A (en) * | 2018-12-13 | 2019-03-01 | 大连海事大学 | A kind of Hydrodynamic cavitation strengthens the device of nitrogen oxides in chlorine dioxide removing ship tail gas |
| CN109395586B (en) * | 2018-12-13 | 2024-01-16 | 大连海事大学 | Device for removing nitrogen oxides in ship tail gas by hydrodynamic cavitation reinforced chlorine dioxide |
| CN110758633A (en) * | 2019-10-30 | 2020-02-07 | 西安交通大学 | Venturi system for reducing resistance of hull bubbles |
| JP2022547488A (en) * | 2019-12-28 | 2022-11-14 | 天津市華諾通信工程有限公司 | Method and device for reducing wave-making resistance and frictional resistance during navigation of a ship |
| JP7334339B2 (en) | 2019-12-28 | 2023-08-28 | 天津市華諾通信工程有限公司 | Method and device for reducing wave-making resistance and frictional resistance during navigation of a ship |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20070501 |