WO2021078194A1 - 一种船舶甲醇舱柜惰化系统及方法 - Google Patents

一种船舶甲醇舱柜惰化系统及方法 Download PDF

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WO2021078194A1
WO2021078194A1 PCT/CN2020/122838 CN2020122838W WO2021078194A1 WO 2021078194 A1 WO2021078194 A1 WO 2021078194A1 CN 2020122838 W CN2020122838 W CN 2020122838W WO 2021078194 A1 WO2021078194 A1 WO 2021078194A1
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oxygen concentration
methanol
methanol tank
valve
concentration sensor
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PCT/CN2020/122838
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English (en)
French (fr)
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晏志清
王正钧
晏二华
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江龙船艇科技股份有限公司
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Publication of WO2021078194A1 publication Critical patent/WO2021078194A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like

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  • the invention is applied to the technical field of inerting systems, and particularly relates to a ship methanol tank inerting system and method.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and provide a safe, reliable and simple operation and management of the ship methanol tank inerting system and method.
  • the present invention includes an input module, a methanol tank, and an output module connected in sequence
  • the marine methanol tank inerting system also includes a nitrogen supply device, a pressure reducing check valve, and a solenoid valve connected in sequence
  • a cut-off check valve the output end of the cut-off check valve is in communication with the methanol chamber
  • a first oxygen concentration sensor electrically connected to the solenoid valve is provided in the methanol chamber.
  • the first oxygen concentration sensor feeds back an electrical signal to activate the solenoid valve, and a pressure vacuum valve is provided on the methanol chamber.
  • the pressure vacuum valve will suck the pressure in the air balance chamber, and the nitrogen supply device is provided to provide inert gas to prevent the oxygen concentration from reaching the flammable limit.
  • the oxygen concentration is detected by setting the first oxygen concentration sensor in the methanol chamber, and when the concentration reaches a preset value, the solenoid valve is activated to fill the methanol chamber with inert gas to balance the Pressure and inerting. Realize automatic inerting, reduce manual operation, make management easier, and realize safety and reliability even when unattended through automatic detection.
  • the nitrogen supply device is a nitrogen generator or a nitrogen cylinder.
  • the nitrogen generator is suitable for inerting the methanol tank of large ships, and the nitrogen cylinder is suitable for the use of small ships.
  • a preferred solution is that a second oxygen concentration sensor is further provided in the methanol cabin, the preset value of the second oxygen concentration sensor is higher than that of the first oxygen concentration sensor, and an audible and visual alarm is provided outside the methanol cabin.
  • the second oxygen concentration sensor is electrically connected to the sound and light alarm
  • the marine methanol tank inerting system further includes a remote control shutoff valve, and the output end of the nitrogen supply device is connected to the remote control shutoff valve
  • the output end of the remote control shut-off valve is connected with a supply hose, the output end of the supply hose is provided with a first quick connector, and both the input module and the output module are provided with the first quick connector.
  • the second quick connector with matching connector.
  • the input module includes an injection head, the injection head communicates with the methanol tank through an input pipe, and the second quick connector is arranged between the injection head and the methanol tank.
  • manual nitrogen charging inerting is achieved by setting the second quick connector at the input module, and at the same time the manual nitrogen charging reduces the pipeline when the tank is used for the first time, filling, stripping, and pipeline inerting The concentration of oxygen in the system.
  • the output module includes an output supply valve and an output pipe arranged on the methanol tank, the second quick connector is arranged on the output pipe, and a third oxygen gas is also arranged inside the output pipe. Concentration sensor.
  • the third oxygen concentration sensor is provided in the output pipeline to detect the oxygen concentration in the output methanol, and when the oxygen concentration reaches a preset value, an electrical signal is fed back to the solenoid valve to charge nitrogen.
  • a preferred solution is that the gas output velocity when the pressure vacuum valve is opened is 30 m/s.
  • a preferred solution is that the vacuum end of the pressure vacuum valve is provided with a stainless steel fireproof net.
  • the inerting method includes the following steps:
  • the pressure vacuum valve will draw in outside air, and the pressure reduction check valve and the cut-off check valve will be opened in advance.
  • the second oxygen concentration sensor detects that the oxygen concentration inside the methanol chamber is greater than or equal to 10%
  • the second oxygen concentration sensor feeds back an electrical signal to the sound and light alarm to make it sound an alarm.
  • the first oxygen concentration sensor or the third oxygen concentration sensor fails and the solenoid valve cannot be activated
  • the first quick connector is manually connected to the second quick connector of the input module, and by opening The remote control shut-off valve allows the methanol compartment to be entered from the input module, and similarly reduces the oxygen concentration in the methanol compartment, and is checked and repaired by the staff.
  • the above method ensures that the oxygen in the methanol tank is maintained at a low concentration state, and the safety of the fuel is ensured.
  • Fig. 1 is a schematic diagram of the structure of the present invention.
  • the present invention includes an input module, a methanol tank 1 and an output module connected in sequence.
  • the marine methanol tank inerting system also includes a nitrogen supply device 2 connected in sequence, a decompression stop
  • the return valve 3, the solenoid valve 4 and the cut-off check valve 5, the output end of the cut-off check valve 5 is in communication with the methanol chamber 1, and the methanol chamber 1 is provided with an electrical connection with the solenoid valve 4
  • the nitrogen supply device 2 is a nitrogen generator or a nitrogen bottle.
  • a second oxygen concentration sensor 8 is further provided in the methanol tank 1, and the preset value of the second oxygen concentration sensor 8 is higher than that of the first oxygen concentration sensor 6, and the methanol tank 1
  • An audible and visual alarm 9 is provided outside, the second oxygen concentration sensor 8 is electrically connected to the audible and visual alarm 9,
  • the marine methanol tank inerting system further includes a remote control shut-off valve 10, and the nitrogen supply equipment
  • the output end of 2 is connected to the remote control cut-off valve 10, the output end of the remote control cut-off valve 10 is connected with a supply hose 11, and the output end of the supply hose 11 is provided with a first quick connector 12, and the input Both the module and the output module are provided with a second quick connector 13 adapted to the first quick connector 12.
  • the input module includes an injection head 14, the injection head 14 communicates with the methanol tank 1 through an input pipe, and the second quick connector 13 is arranged between the injection head 14 and the methanol tank. 1 between.
  • the output module includes an output supply valve 15 and an output pipe arranged on the methanol tank 1, the second quick connector 13 is arranged on the output pipe, and the inside of the output pipe is also arranged There is a third oxygen concentration sensor.
  • the gas output velocity when the pressure vacuum valve 7 is opened is 30 m/s.
  • the vacuum end of the pressure vacuum valve 7 is provided with a stainless steel fireproof net.
  • the inerting method includes the following steps:
  • the pressure vacuum valve 7 will suck in outside air, and the pressure reduction check valve 3 and the stop check valve 5 will be opened in advance.
  • the first oxygen concentration is When the sensor 6 or the third oxygen concentration sensor detects that the oxygen concentration is greater than or equal to 8%, it feeds back an electrical signal to the solenoid valve 4, and the solenoid valve 4 is opened to fill the methanol chamber 1 with nitrogen, and the air from Ejected from the pressure vacuum valve 7 to reduce the oxygen concentration in the methanol chamber 1;
  • the second oxygen concentration sensor 8 detects that the oxygen concentration inside the methanol chamber 1 is greater than or equal to 10%
  • the second oxygen concentration sensor 8 feeds back an electrical signal to the sound and light alarm 9 to make it An alarm is issued.
  • the first oxygen concentration sensor 6 or the third oxygen concentration sensor fails to start the solenoid valve 4, and the first quick connector 12 is manually connected to the first quick connector of the input module.
  • the remote control shut-off valve 10 open the remote control shut-off valve 10 to enter the methanol tank 1 from the input module, and similarly reduce the oxygen concentration in the methanol tank 1, and the staff will perform maintenance.
  • the remote control shut-off valve 10 is closed.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

一种安全可靠且操作管理简单的船舶甲醇舱柜惰化系统及方法，应用于惰化系统的技术领域。船舶甲醇舱柜惰化系统包括依次连接的输入模块、甲醇舱（1）以及输出模块，还包括依次连接的氮气供应设备（2）、减压止回阀（3）、电磁阀（4）以及截止止回阀（5），截止止回阀（5）的输出端与甲醇舱（1）连通，甲醇舱（1）内设置有与电磁阀（4）电性连接的第一氧气浓度传感器（6），当甲醇舱（1）内的氧气浓度大于预设值时，第一氧气浓度传感器（6）反馈电信号使电磁阀（4）启动，甲醇舱（1）上设置有压力真空阀（7）。

Description

一种船舶甲醇舱柜惰化系统及方法 技术领域
本发明应用于惰化系统的技术领域,特别涉及一种船舶甲醇舱柜惰化系统及方法。
背景技术
在运输甲醇的船舶或以甲醇作为船用发动机燃料的船舶上，因甲醇的低闪点、易燃易爆等特性，必须做好十足的安全防范工作，以防止装有甲醇的舱柜在进入空气达到可燃浓度后发生爆炸，因此，甲醇燃料舱需进行惰化以防止氧气浓度的增加达到可燃爆区间。
发明内容
本发明所要解决的技术问题是克服现有技术的不足，提供了一种安全可靠且操作管理简单的船舶甲醇舱柜惰化系统及方法。
本发明所采用的技术方案是：本发明包括依次连接的输入模块、甲醇舱以及输出模块，所述船舶甲醇舱柜惰化系统还包括依次连接的氮气供应设备、减压止回阀、电磁阀以及截止止回阀，所述截止止回阀的输出端与所述甲醇舱连通，所述甲醇舱内设置有与所述电磁阀电性连接的第一氧气浓度传感器，当所述甲醇舱内的氧气浓度大于预设值时所述第一氧气浓度传感器反馈电信号使所述电磁阀启动，所述甲醇舱上设置有压力真空阀。
由上述方案可见，当所述甲醇舱内的压力降低时所述压力真空阀会吸入空气平衡舱内的压力，通过设置所述氮气供应设备提供惰性气体防止氧气浓度达到可燃界限。通过在所述甲醇舱内设置所述第一氧气浓度传感器进行氧气浓度的检测，当浓度到达预设值时启动所述电磁阀对所述甲醇舱充入惰性气体，平衡所述甲醇舱内的压力并进行惰化。实现自动惰化，减少人工操作，使管理更简单，同时通过自动检测实现在无人值守时仍能够保证安全可靠。
一个优选方案是，所述氮气供应设备为制氮机或氮气瓶。
由上述方案可见，制氮机适用于大型船舶的甲醇舱惰化，氮气瓶则适用于小型船舶的使用。
一个优选方案是，所述甲醇舱内还设置有第二氧气浓度传感器，所述第二氧气浓度传感器的预设值高于所述第一氧气浓度传感器，所述甲醇舱外部设置有声光警报器，所述第二氧气浓度传感器与所述声光警报器电性连接，所述船舶甲醇舱柜惰化系统还包括遥控截止阀，所述氮气供应设备的输出端与所述遥控截止阀相连通，所述遥控截止阀的输出端连接有供应软管，所述供应软管的输出端设置有第一快速接头，所述输入模块和所述输出 模块上均设置有与所述第一快速接头相适配的第二快速接头。
由上述方案可见，通过设置所述第二氧气浓度传感器实现氧气的浓度过高时的警报，防止所述第一氧气浓度传感器出故障无法启动电磁阀导致所述甲醇舱内氧气浓度过高的情况发生，同时设置所述遥控截止阀和供应软管实现手动充氮降低箱内的氧气浓度，增加惰化系统的安全性。同时手动冲氮还应用于初次使用箱体、加注、扫舱以及管路惰化中。
进一步的优选方案是，所述输入模块包括注入头，所述注入头通过输入管道与所述甲醇舱连通，所述第二快速接头设置在所述注入头与所述甲醇舱之间。
由上述方案可见，通过在所述输入模块处设置所述第二快速接头实现手动充氮惰化，同时在初次使用箱体、加注、扫舱以及管路惰化时手动充氮降低管路系统中氧气浓度。
一个优选方案是，所述输出模块包括设置在所述甲醇舱上的输出供应阀和输出管道，所述第二快速接头设置在所述输出管道上，所述输出管道内部还设置有第三氧气浓度传感器。
由上述方案可见，通过在所述输出管道内设置所述第三氧气浓度传感器检测输出的甲醇中的氧气浓度，当氧气浓度到达预设值时反馈电信号给所述电磁阀，进行充氮。
一个优选方案是，所述压力真空阀开启时气体的输出速度为30m/s。
由上述方案可见，高速喷出的气体能够防止火焰进入所述甲醇舱中。
一个优选方案是，所述压力真空阀的真空端设有不锈钢防火网。
由上述方案可见，通过设置所述不锈钢防火网防止火焰随所述压力真空阀的吸气动作进入所述甲醇舱中。
所述惰化方法包括以下步骤：
A.在所述甲醇舱抽出甲醇的过程中所述压力真空阀会吸入外界空气，预先打开所述减压止回阀和所述截止止回阀，当所述第一氧气浓度传感器或所述第三氧气浓度传感器检测到氧气浓度大于或等于8％时反馈电信号至所述电磁阀，所述电磁阀开启使氮气充入所述甲醇舱中，使空气从所述压力真空阀中喷出，降低所述甲醇舱内的氧气浓度；
B.当氧气浓度低于8％时所述电磁阀关闭停止充氮；
C.当所述第二氧气浓度传感器检测到所述甲醇舱内部的氧气浓度大于或等于10％时，所述第二氧气浓度传感器反馈电信号给所述声光警报器使其发出警报，此时所述第一氧气浓度传感器或所述第三氧气浓度传感器失灵无法启动所述电磁阀，由人工将所述第一快速接头连接至所述输入模块的所述第二快速接头上，通过打开所述遥控截止阀使从所述输入模块中进入所述甲醇舱，同理降低所述甲醇舱内氧气浓度，并由工作人员进行检修。
由上述方案可见，通过上述方法确保所述甲醇舱内氧气保持在低浓度状态，确保燃料的安全性。
附图说明
图1是本发明的结构示意图。
具体实施方式
如图1所示，在本实施例中，本发明包括依次连接的输入模块、甲醇舱1以及输出模块，所述船舶甲醇舱柜惰化系统还包括依次连接的氮气供应设备2、减压止回阀3、电磁阀4以及截止止回阀5，所述截止止回阀5的输出端与所述甲醇舱1连通，所述甲醇舱1内设置有与所述电磁阀4电性连接的第一氧气浓度传感器6，当所述甲醇舱1内的氧气浓度大于预设值时所述第一氧气浓度传感器6反馈电信号使所述电磁阀4启动，所述甲醇舱1上设置有压力真空阀7。
在本实施例中，所述氮气供应设备2为制氮机或氮气瓶。
在本实施例中，所述甲醇舱1内还设置有第二氧气浓度传感器8，所述第二氧气浓度传感器8的预设值高于所述第一氧气浓度传感器6，所述甲醇舱1外部设置有声光警报器9，所述第二氧气浓度传感器8与所述声光警报器9电性连接，所述船舶甲醇舱柜惰化系统还包括遥控截止阀10，所述氮气供应设备2的输出端与所述遥控截止阀10相连通，所述遥控截止阀10的输出端连接有供应软管11，所述供应软管11的输出端设置有第一快速接头12，所述输入模块和所述输出模块上均设置有与所述第一快速接头12相适配的第二快速接头13。
在本实施例中，所述输入模块包括注入头14，所述注入头14通过输入管道与所述甲醇舱1连通，所述第二快速接头13设置在所述注入头14与所述甲醇舱1之间。
在本实施例中，所述输出模块包括设置在所述甲醇舱1上的输出供应阀15和输出管道，所述第二快速接头13设置在所述输出管道上，所述输出管道内部还设置有第三氧气浓度传感器。
在本实施例中，所述压力真空阀7开启时气体的输出速度为30m/s。
在本实施例中，所述压力真空阀7的真空端设有不锈钢防火网。
所述惰化方法包括以下步骤：
A.在所述甲醇舱1抽出甲醇的过程中所述压力真空阀7会吸入外界空气，预先打开所述减压止回阀3和所述截止止回阀5，当所述第一氧气浓度传感器6或所述第三氧气浓度传感器检测到氧气浓度大于或等于8％时反馈电信号至所述电磁阀4，所述电磁阀4开启使氮 气充入所述甲醇舱1中，使空气从所述压力真空阀7中喷出，降低所述甲醇舱1内的氧气浓度；
B.当氧气浓度低于8％时所述电磁阀4关闭停止充氮；
C.当所述第二氧气浓度传感器8检测到所述甲醇舱1内部的氧气浓度大于或等于10％时，所述第二氧气浓度传感器8反馈电信号给所述声光警报器9使其发出警报，此时所述第一氧气浓度传感器6或所述第三氧气浓度传感器失灵无法启动所述电磁阀4，由人工将所述第一快速接头12连接至所述输入模块的所述第二快速接头13上，通过打开所述遥控截止阀10使从所述输入模块中进入所述甲醇舱1，同理降低所述甲醇舱1内氧气浓度，并由工作人员进行检修，当所述声光警报器9停止警报时关闭所述遥控截止阀10。

Claims (8)

  1. 一种船舶甲醇舱柜惰化系统，包括依次连接的输入模块、甲醇舱(1)以及输出模块，其特征在于：所述船舶甲醇舱柜惰化系统还包括依次连接的氮气供应设备(2)、减压止回阀(3)、电磁阀(4)以及截止止回阀(5)，所述截止止回阀(5)的输出端与所述甲醇舱(1)连通，所述甲醇舱(1)内设置有与所述电磁阀(4)电性连接的第一氧气浓度传感器(6)，当所述甲醇舱(1)内的氧气浓度大于预设值时所述第一氧气浓度传感器(6)反馈电信号使所述电磁阀(4)启动，所述甲醇舱(1)上设置有压力真空阀(7)。
  2. 根据权利要求1所述的一种船舶甲醇舱柜惰化系统，其特征在于：所述氮气供应设备(2)为制氮机或氮气瓶。
  3. 根据权利要求1所述的一种船舶甲醇舱柜惰化系统，其特征在于：所述甲醇舱(1)内还设置有第二氧气浓度传感器(8)，所述第二氧气浓度传感器(8)的预设值高于所述第一氧气浓度传感器(6)，所述甲醇舱(1)外部设置有声光警报器(9)，所述第二氧气浓度传感器(8)与所述声光警报器(9)电性连接，所述船舶甲醇舱柜惰化系统还包括遥控截止阀(10)，所述氮气供应设备(2)的输出端与所述遥控截止阀(10)相连通，所述遥控截止阀(10)的输出端连接有供应软管(11)，所述供应软管(11)的输出端设置有第一快速接头(12)，所述输入模块和所述输出模块上均设置有与所述第一快速接头(12)相适配的第二快速接头(13)。
  4. 根据权利要求3所述的一种船舶甲醇舱柜惰化系统，其特征在于：所述输入模块包括注入头(14)，所述注入头(14)通过输入管道与所述甲醇舱(1)连通，所述第二快速接头(13)设置在所述注入头(14)与所述甲醇舱(1)之间。
  5. 根据权利要求4所述的一种船舶甲醇舱柜惰化系统，其特征在于：所述输出模块包括设置在所述甲醇舱(1)上的输出供应阀(15)和输出管道，所述第二快速接头(13)设置在所述输出管道上，所述输出管道内部还设置有第三氧气浓度传感器。
  6. 根据权利要求1所述的一种船舶甲醇舱柜惰化系统，其特征在于：所述压力真空阀(7)开启时气体的输出速度为30m/s。
  7. 根据权利要求1所述的一种船舶甲醇舱柜惰化系统，其特征在于：所述压力真空阀(7)的真空端设有不锈钢防火网。
  8. 基于权利要求5所述的一种船舶甲醇舱柜惰化系统的惰化方法，其特征在于，它包括以下步骤：
    A.在所述甲醇舱(1)抽出甲醇的过程中所述压力真空阀(7)会吸入外界空气，预先打开所述减压止回阀(3)和所述截止止回阀(5)，当所述第一氧气浓度传感器(6)或所述第 三氧气浓度传感器检测到氧气浓度大于或等于8％时反馈电信号至所述电磁阀(4)，所述电磁阀(4)开启使氮气充入所述甲醇舱(1)中，使空气从所述压力真空阀(7)中喷出，降低所述甲醇舱(1)内的氧气浓度；
    B.当氧气浓度低于8％时所述电磁阀(4)关闭停止充氮；
    C.当所述第二氧气浓度传感器(8)检测到所述甲醇舱(1)内部的氧气浓度大于或等于10％时，所述第二氧气浓度传感器(8)反馈电信号给所述声光警报器(9)使其发出警报，此时所述第一氧气浓度传感器(6)或所述第三氧气浓度传感器失灵无法启动所述电磁阀(4)，由人工将所述第一快速接头(12)连接至所述输入模块的所述第二快速接头(13)上，通过打开所述遥控截止阀(10)使从所述输入模块中进入所述甲醇舱(1)，同理降低所述甲醇舱(1)内氧气浓度，并由工作人员进行检修。
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