A TRO sampling detection device for a dangerous area of a ship and a ship

Abstract

The embodiment of the present application provides a TRO sampling detection device for a dangerous area of a ship and the ship. The device comprises an airtight cabinet, a TRO analyzer, a sampling pump, a sampling pipeline, a control system, a combustible gas detector, a suction fan, an air pressure switch and a liquid level switch. The sampling pump and the TRO analyzer are arranged in the airtight metal cabinet to realize TRO sampling and measurement of ballast water, and the combustible gas detector is arranged to ensure the safe use of electrical equipment. In addition, the suction fan and the matched air pressure switch are arranged on the top of the cabinet, so that the cabinet is in a micro-negative pressure state to ensure that the internal environment of the cabinet is always safe. The ordinary TRO analyzer is used to realize TRO sampling and monitoring of ballast water in the dangerous area, the procurement cost of the TRO analyzer is saved, the later maintenance of the instrument is facilitated, and the requirements of the classification society standard are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ship ballast water treatment, and in particular to a TRO sampling and detecting device for a dangerous area of a ship. BACKGROUND

[0002] Currently, for the ship types of oil tankers, chemical tankers and the like, the ballast piping system is arranged in the dangerous area such as the cargo pump cabin, and the total residual oxide (TRO) analyzer is generally arranged in the dangerous area and close to the ballast piping system for convenient sampling. The electrical equipment installed in the dangerous area must be of a proper explosion-proof type to ensure the safety of the ship and personnel, which also means that the explosion-proof TRO analyzer must be used for TRO monitoring of the ballast water treatment in the dangerous area. Compared with the ordinary TRO analyzer, the explosion-proof TRO analyzer is more expensive, and the price is generally twice or even higher than that of the ordinary type. In addition, in order to meet the explosion-proof requirements, the maintenance of the explosion-proof TRO analyzer is more complex, and before entering the cargo pump cabin, the crew must perform forced ventilation and combustible gas detection on the cargo pump cabin to ensure the safety of personnel.

[0003] According to the requirements of the ship classification society, the ballast water in the dangerous area is not allowed to enter the safe area such as the engine room. However, considering that the amount of ballast water required for TRO sampling, biological sampling and the like is very small, in principle, the ballast water in the dangerous area is allowed to enter the safe area for sampling analysis. However, there is currently no specific and feasible solution for how to use the ordinary TRO analyzer installed in the safe area to detect the TRO of the ballast piping system in the dangerous area. SUMMARY

[0004] In order to use the ordinary TRO analyzer for TRO sampling and monitoring of the ballast water in the dangerous area, save the procurement cost of the TRO analyzer, facilitate the later maintenance of the instrument, and meet the requirements of the ship classification society, the present application provides a TRO sampling and detecting device for a dangerous area.

[0005] In a first aspect, an embodiment of the present application provides a TRO sampling and detecting device for a dangerous area, comprising: a gas-tight cabinet, a TRO analyzer, a sampling pump, a sampling pipeline, a control system, a combustible gas detector, a suction fan, a wind pressure switch and a liquid level switch; wherein:

[0006] The sampling pump is used to drive the sampling water to flow from the flow inlet to the flow outlet of the sampling pipeline;

[0007] The TRO analyzer is connected with the sampling pipeline and is used to detect the sampling water;

[0008] The suction fan is installed on the top of the airtight cabinet, and the suction inlet of the suction fan is located inside the airtight cabinet to form a negative pressure by sucking air from the airtight cabinet, and the air sucked from the airtight cabinet is discharged to the safety area of the open deck of the ship through the air duct.

[0009] The combustible gas detector is installed on the top inside the airtight cabinet to monitor the combustible gas in the airtight cabinet, and the combustible gas detector has an analog signal output and an on-off signal output.

[0010] The air pressure switch is installed in the airtight cabinet to monitor the air pressure in the airtight cabinet.

[0011] The liquid level switch is installed at the bottom of the airtight cabinet to monitor the liquid in the airtight cabinet.

[0012] An electromagnetic valve is installed on the compressed air supply pipeline of the sampling pump to control the start and stop of the sampling pump.

[0013] Remote control valves are arranged at the flow inlet and the backflow port of the sampling pipeline respectively to control the entry and backflow of the sampling water.

[0014] The control system is electrically connected to each electrical component including the TRO analyzer, the sampling pump, the combustible gas detector, the suction fan, the air pressure switch, the liquid level switch, and the electromagnetic valve and the remote control valve, for transmitting and receiving signals with each electrical component to control the TRO sampling detection of the device.

[0015] In some optional embodiments, the measurement method of the TRO analyzer includes one of the following: DPD colorimetric method, amperometric method or oxidation-reduction potential method.

[0016] In some optional embodiments, the airtight cabinet is made of metal material, and the inner and outer surfaces are coated with a corrosion-resistant coating.

[0017] In some optional embodiments, the protection level of the airtight cabinet is not less than IP44.

[0018] In some optional embodiments, a transparent window is arranged on the shell of the airtight cabinet.

[0019] In some optional embodiments, the sampling pump is a pneumatic diaphragm pump.

[0020] In some optional embodiments, the suction fan is a spark-free type fan.

[0021] In some optional embodiments, the end of the air duct is designed in a swan neck shape to prevent seawater from flowing into the air duct, and a fire-retardant mesh is installed at the end of the air duct.

[0022] In some optional embodiments, the control system is configured to send an alarm or stop the operation of the device when a malfunction of the device is determined according to the combustible gas concentration, wind pressure and liquid level information fed back by the combustible gas detector, the wind pressure switch and the liquid level switch.

[0023] In a second aspect, the embodiments of the present application provide a ship comprising the TRO sampling and detecting device for a dangerous area as any of the embodiments of the first aspect.

[0024] The beneficial effects of the above embodiments of the present application are as follows:

[0025] The TRO sampling and detecting device of the present application realizes automatic operation of TRO sampling and detecting, and has automatic safety protection measures, reduces personnel operation, meets the requirements of automatic operation of ship ballast water treatment systems, and meets the requirements of IMO and port state certification; the TRO sampling and detecting device of the present application provides a solution for TRO sampling and detecting of ballast water in a dangerous area using non-explosion-proof instruments and equipment in a safe area, saves the cost of purchasing explosion-proof instruments and components, and increases the use conditions of non-explosion-proof instruments; the safety measures of the present application solve the safety problem of sampling from a dangerous area and analyzing in a safe area, the related safety design is higher than the requirements of the classification society, enhances the reliability and safety of the whole device, and ensures the safety of the ship and the crew; the TRO sampling and detecting device of the present application can be used not only in the ship ballast water treatment industry, but also in sampling and detecting of other dangerous areas, and has wide application prospects. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the embodiments discussed herein and, together with the description, further serve to explain the principles of the application.

[0027] Figure 1 FIG. 1 is a structural schematic diagram of a TRO sampling and detecting device for a dangerous area according to an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a TRO sampling and detecting schematic diagram of a ballast process according to an embodiment of the present application;

[0029] Figure 3 FIG. 3 is a TRO sampling and detecting schematic diagram of a discharge process according to an embodiment of the present application;

[0030] Figure 4 FIG. 4 is a TRO sampling and detecting schematic diagram of a ballast process according to another embodiment of the present application;

[0031] Figure 5 FIG. 5 is a TRO sampling and detecting schematic diagram of a discharge process according to another embodiment of the present application.

[0032] Symbol explanation:

[0033] 11 - air tight cabinet; 12 - TRO analyzer; 13 - sampling pump; 14 - sampling pipeline; 15 - control system; 16 - combustible gas detector; 17 - suction fan; 18 - air pressure switch; 19 - liquid level switch; 20 - air duct; 21 - fire screen; 22 - compressed air; 23 - electromagnetic valve; 24 - remote control valve; 25 - junction box; 26 - ballast pipeline; 27 - ballast discharge pipeline; 28 - drain outlet; 29 - engine room; 30 - cargo pump room; 31 - blowdown water collecting tank. DETAILED DESCRIPTION

[0034] In order to enable persons skilled in the art to more fully understand the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below with reference to the accompanying drawings, which are only used for reference and do not limit the embodiments of the present application.

[0035] In the description of the embodiments of the present application, it should be noted that unless otherwise stated and limited, the term "connection" should be understood broadly, for example, it can be an electrical connection, or a connection between two elements, it can be directly connected, or indirectly connected through an intermediate medium, and those skilled in the art can understand the specific meaning of the above-mentioned term according to the specific circumstances.

[0036] Figure 1 A structure diagram of a TRO sampling detection device for a hazardous area according to an embodiment of the present application. The device includes an air tight cabinet 11, a TRO analyzer 12, a sampling pump 13, a sampling pipeline 14, a control system 15, a combustible gas detector 16, a suction fan 17, an air pressure switch 18, and a liquid level switch 19. Figure 1 As shown in the figure, the device includes an air tight cabinet 11, a TRO analyzer 12, a sampling pump 13, a sampling pipeline 14, a control system 15, a combustible gas detector 16, a suction fan 17, an air pressure switch 18, and a liquid level switch 19.

[0037] The sampling pump 13 is used to drive the sampling water to flow from the flow inlet to the flow outlet of the sampling pipeline 14.

[0038] The TRO analyzer 12 is connected with the sampling pipeline 14, and is used to detect the sampling water.

[0039] The suction fan 17 is installed at the top of the air tight cabinet 11, and the suction inlet of the suction fan 17 is located inside the air tight cabinet 11. The suction fan 17 forms a negative pressure by suction from the inside of the air tight cabinet 11, and the air sucked from the inside of the air tight cabinet 11 is discharged to the safety area of the open deck of the ship through the air duct 20.

[0040] The combustible gas detector 16 is installed at the top inside the air tight cabinet 11, and is used to monitor the combustible gas inside the air tight cabinet 11. The combustible gas detector 16 has an analog signal output and a switching signal output.

[0041] The air pressure switch 18 is installed in the air-tight cabinet 11 to monitor the air pressure in the air-tight cabinet 11.

[0042] The liquid level switch 19 is installed at the bottom of the air-tight cabinet 11 to monitor the liquid in the air-tight cabinet 11.

[0043] The electromagnetic valve 23 is installed on the compressed air 22 supply line of the sampling pump 13 to control the start and stop of the sampling pump 13.

[0044] The remote control valves 24 are installed at the flow inlet and return flow of the sampling line 14 to control the entry and return flow of the sampling water.

[0045] The control system 15 is electrically connected to each electrical component including the TRO analyzer 12, the sampling pump 13, the combustible gas detector 16, the suction fan 17, the air pressure switch 18, the liquid level switch 19, the electromagnetic valve 23, and the remote control valves 24 to transmit and receive signals to each electrical component to control the TRO sampling detection of the device.

[0046] In some optional embodiments, the measurement method of the TRO analyzer 12 includes one of the following: DPD (N,N-diethyl-1,4-phenylenediamine) colorimetric method, amperometric method, or redox potential method.

[0047] In some optional embodiments, the air-tight cabinet 11 is made of metal material, and the inner and outer surfaces are coated with a corrosion-resistant coating.

[0048] In some optional embodiments, the protection level of the air-tight cabinet 11 is not less than IP44.

[0049] In some optional embodiments, a transparent window is provided on the shell of the air-tight cabinet 11.

[0050] In some optional embodiments, the sampling pump 13 is a pneumatic diaphragm pump.

[0051] In some optional embodiments, the suction fan 17 is a spark-free fan.

[0052] In some optional embodiments, the end of the air duct 20 is designed in a swan neck shape to prevent seawater from flowing into the air duct 20, and a fire-retardant mesh 21 is installed at the end of the air duct 20.

[0053] In some optional embodiments, the control system 15 is used to determine when the device fails according to the combustible gas concentration, air pressure, and liquid level information fed back by the combustible gas detector 16, the air pressure switch 18, and the liquid level switch 19, and to send an alarm or stop the operation of the device.

[0054] The TRO sampling detection device for dangerous area of the embodiment of the present application mainly comprises an airtight cabinet 11, a TRO analyzer 12, a gas sampling pump 13, a control system 15, a combustible gas detector 16, a suction fan 17, an air pressure switch 18, a liquid level switch 19, and a matched electromagnetic valve 23, a remote control valve 24, a sampling pipeline 14 and a fire barrier net 21.

[0055] The airtight cabinet 11 is made of metal material, and the inner and outer surfaces are provided with anti-corrosion coating to resist marine atmosphere and seawater corrosion. The protection grade of the cabinet is at least IP44 to meet the installation and use requirements of the ship. The shell is provided with a transparent window for conveniently observing the running state of the internal equipment. The sampling pump 13 is selected as a pneumatic diaphragm pump which has certain self-suction capacity and only needs compressed air 22 to drive, and is safer, has small and adjustable flow, and is more suitable for TRO sampling. The TRO analyzer 12 is selected as an instrument using DPD colorimetric method, current method or oxidation-reduction potential method for measuring TRO concentration. The suction fan 17 is a spark-free fan installed on the top of the cabinet. The suction inlet of the fan is located inside the cabinet to form negative pressure by suction from the inside of the cabinet, so as to ensure that the inside of the cabinet always maintains a safe environment and ensures the safe operation of the electrical equipment. The air sucked from the cabinet is discharged to the safe area of the open deck of the ship through the air duct 20. The end of the air duct 20 is designed in a swan neck type to prevent seawater from flowing into the air duct 20. A stainless steel fire barrier net 21 is installed at the end of the air duct 20 to prevent possible sparks.

[0056] The combustible gas detector 16 is installed on the top inside the cabinet for monitoring possible dangerous gas accumulation in the cabinet. In addition to normal analog signal output, the combustible gas detector 16 also has a switching signal output. The air pressure switch 18 is used to monitor the air pressure of the cabinet to ensure that the inside of the cabinet is always in a negative pressure state. The liquid level switch 19 is installed near the bottom of the cabinet for monitoring possible liquid leakage in the cabinet. In addition, the electromagnetic valve 23 is installed on the compressed air 22 supply pipeline of the sampling pump 13 to control the start and stop of the sampling pump 13. The sampling pipeline 14 is provided with remote control switch valves at the inlet and return ports for controlling the entry and return of the sampling water. The sampling pipeline 14 can be selected as a small-diameter seawater corrosion-resistant metal pipe with a nominal diameter not exceeding DN25, using a seamless pipe and being connected by welding to reduce the number of joint connections.

[0057] The control system 15 can adopt a multi-channel programmable controller, a power supply assembly and an alarm assembly for controlling the normal operation of the whole device TRO sampling detection, monitoring the related operating parameters such as the combustible gas concentration in the cabinet, the air pressure, the liquid level and the like, and issuing an audible and light alarm or even stopping the operation of the whole device when the device has an operating failure. The power supply assembly includes circuit breakers, contactors, wiring terminals and other electrical elements, mainly for the power supply of the TRO analyzer 12, the fan, the monitoring instrument, the electromagnetic valve 23 and the remote control valve 24 and all the electrical components, the alarm assembly includes a buzzer and an alarm indicator lamp for issuing an audible and light alarm prompt to the crew.

[0058] The present application completes the sampling of the ballast water in the dangerous area by the sampling pump 13 and completes the TRO measurement of the sampled water by the TRO analyzer 12, at the same time, the cabinet is pumped by the suction fan 17 to form a negative pressure to ensure the safe environment in the cabinet and ensure the safe operation of the electrical equipment, and the related monitoring instruments monitor the dangerous gas concentration, air pressure and liquid level in the cabinet in real time to ensure the normal operation of the whole device. The working principle of the whole device is as follows:

[0059] (1) Device start-up:

[0060] When the device starts, the control system 15 first powers on the fan and the gas detector through the junction box 25, the fan pumps the cabinet, and the combustible gas detector 16 monitors the dangerous gas concentration in the cabinet to ensure the safe environment in the cabinet. When the fan runs for more than 1 minute and the combustible gas detector 16 does not trigger an alarm when monitoring the dangerous gas concentration in the cabinet, the control system 15 will power on other electrical components in the cabinet, including instruments and valves.

[0061] (2) TRO sampling detection:

[0062] When the device is powered on, TRO sampling detection will begin. Open the remote control valve 24 on the sampling pipeline 14 and the electromagnetic valve 23 on the compressed air 22 pipeline of the sampling pump 13, the sampling pump 13 starts to run and transports the ballast water in the dangerous area into the cabinet through the sampling water inlet, the TRO analyzer 12 is powered on and starts to automatically sample and measure and monitor the TRO concentration, the water in the sampling pipeline 14 returns to the ballast pipeline in the dangerous area through the sampling water return port. The fan, the combustible gas detector 16, the air pressure switch 18 and the liquid level switch 19 will continue to run and monitor the operating state of the whole device in real time. The TRO sampling detection process will continue throughout the ballast water treatment process.

[0063] (3) Device stop:

[0064] When the system stops the treatment of ballast water, the control system 15 will close the electromagnetic valve 23 on the sampling pipeline 14 remote control valve 24 and compressed air 22 pipeline in the cabinet, cut off the water and gas, while the TRO analyzer 12 will stop working. The suction fan 17 and combustible gas detector 16 will continue to run, real-time monitoring of the dangerous gas concentration in the cabinet. When the fan runs more than 5 minutes and the combustible gas detector 16 monitors the dangerous gas concentration in the cabinet does not trigger the alarm, the control system 15 will power off the fan, the combustible gas detector 16 and liquid level switch 19 will continue to monitor the dangerous gas concentration in the cabinet and the liquid leakage that may occur in the cabinet.

[0065] (4) Device alarm settings:

[0066] High concentration of dangerous gas and high concentration of dangerous gas alarm settings:

[0067] When the combustible gas detector 16 monitors the dangerous gas concentration in the cabinet is higher than 15% LEL (low explosive limit) or 15% LFL (low burning limit), the control system 15 will trigger the high concentration of dangerous gas alarm, and sound and light alarm will be issued at the device, the ballast water management system operation place, and the TRO sampling detection device will continue to run.

[0068] When the combustible gas detector 16 monitors the dangerous gas concentration in the cabinet is higher than 25% LEL or 25% LFL, the control system 15 will trigger the high concentration of dangerous gas alarm, and the entire TRO sampling detection device will be immediately powered off and stopped running, and sound and light alarm will be issued at the device, the ballast water management system operation place. In addition, the switch output setting value of the combustible gas detector 16 will also be set at 25% LEL, when the combustible gas detector 16 monitors the dangerous gas concentration in the cabinet is higher than 25% LEL or 25% LFL, the power supply of the entire device will be directly cut off to realize independent shutdown alarm of the device.

[0069] Low wind pressure alarm settings:

[0070] When the wind pressure switch 18 monitors that the negative pressure in the cabinet is lower than the set value, the control system 15 will trigger the low wind pressure alarm, and sound and light alarm will be issued at the device, the ballast water management system operation place, and the TRO sampling detection device will continue to run.

[0071] High liquid level alarm settings:

[0072] When the liquid level switch 19 monitors that the liquid level in the cabinet is higher than the set value, the control system 15 will trigger the high liquid level alarm, and sound and light alarm will be issued at the device, the ballast water management system operation place, and the TRO sampling detection device will stop running and close the sampling pipeline 14 remote control valve 24 and compressed air 22 pipeline electromagnetic valve 23.

[0073] Equipment failure alarm settings:

[0074] When the TRO analyzer 12, combustible gas detector 16, inlet and outlet valve or solenoid valve 23 fails, the control system 15 will trigger the equipment failure shutdown alarm, the TRO sampling detection device will stop running, and the sound and light alarm will be issued at the device and the ballast water management system operation.

[0075] The TRO sampling detection device of the present application realizes the automatic operation of TRO sampling detection, and has automatic safety protection measures, reduces personnel operation, meets the requirements of ship ballast water treatment system automatic operation, and meets the requirements of IMO and port state certification.

[0076] The TRO sampling detection device of the present application provides a solution for TRO sampling detection of dangerous area ballast water in a safe area using non-explosion-proof instruments and equipment, saves the cost of purchasing explosion-proof instruments and components, and increases the working conditions of non-explosion-proof instruments.

[0077] The safety measures of the present application solve the safety problem of sampling and analysis in a safe area from a dangerous area, the related safety design is higher than the requirement of the classification society standard, the reliability and safety of the whole device are enhanced, and the safety of the ship and the crew is ensured.

[0078] The sampling detection device of the present application can be used not only in the ship ballast water treatment industry, but also in sampling detection of other dangerous areas, and has wide application prospect.

[0079] Figure 2 and Figure 3 are respectively the TRO sampling detection schematic diagram of the ballast and unloading process of an embodiment of the present application. The TRO sampling detection process of the ballast and unloading process of an embodiment of the TRO sampling detection device for a dangerous area of the present application is respectively shown in Figure 2 and Figure 3 . Specifically as follows:

[0080] A certain 300,000-ton super large oil tanker (VLCC) contains two sets of ballast systems of left and right sides, and the ballast piping is arranged in the cargo pump cabin 30 belonging to a dangerous area. Each set of ballast system is equipped with one ballast pump with a rated flow of 3000m 3 / h and one set of ballast water treatment system with a rated flow of 3000m 3The electrolytic ballast water management system uses the electrolytic TRO analyzer 12 which is directly inserted into the sampling pipeline 14 for online measurement of TRO concentration. During ballasting, the electrolytic ballast water management system electrolyzes active substances to sterilize and inactivate the ballast water, meeting the requirements of IMO and port countries for ballast water discharge. At the same time, the control system 15 starts the TRO sampling detection device, and the control system 15 first powers on the fan and the gas detector through the junction box 25. The fan sucks air in the cabinet, and the combustible gas detector 16 monitors the concentration of dangerous gases in the cabinet to ensure a safe environment in the cabinet. When the fan has been running for more than 1 minute and the combustible gas detector 16 has not triggered an alarm, the control system 15 will power on other electrical components in the cabinet, including instruments and valves. After all the devices are powered on, the TRO sampling detection will begin. At this time, the system opens the remote control valve 24 on the sampling pipeline 14 and the electromagnetic valve 23 on the compressed air 22 pipeline, and the sampling pump 13 starts to run to take water from the ballast pipeline 26 in the cabin, which is transported into the cabinet through the sampling water inlet. After the TRO analyzer 12 is powered on, it will automatically measure and monitor the TRO concentration. The water in the sampling pipeline 14 returns to the ballast pipeline 26 in the dangerous area through the sampling water return port. After ballasting is completed, the entire ballast water management system will stop running, and the crew should manually close the inlet and outlet manual valves on the sampling pipeline 14 in the engine room 29. The control system 15 will close the remote control valve 24 on the sampling pipeline 14 and the electromagnetic valve 23 on the compressed air 22 pipeline in the cabinet, cutting off the water and air paths. At the same time, the TRO analyzer 12 will be powered off and stop working. The suction fan 17 and the combustible gas detector 16 will continue to run to monitor the concentration of dangerous gases in the cabinet in real time. When the fan has been running for more than 5 minutes and the combustible gas detector 16 has not triggered an alarm, the control system 15 will power off the fan, and the gas detector and the liquid level switch 19 will continue to monitor the concentration of dangerous gases in the cabinet and possible liquid leakage in the cabinet. During unballasting, the working process of the TRO sampling detection device is basically the same as that during ballasting, but the device will take water from the unballast pipeline 27 near the discharge port 28, and the sampling water will return to the unballast pipeline 27. Here, the engine room 29 is the safe area, and the cargo pump room 30 is the dangerous area.

[0081] Figure 4 and Figure 5 are respectively the TRO sampling detection schematic diagrams of the ballasting and unballasting processes of another embodiment of the present application. The TRO sampling detection flow of the TRO sampling detection device for the dangerous area during the ballasting and unballasting processes of another embodiment of the present application is shown in Figure 4 and Figure 5 . Specifically as follows:

[0082] A 158,000 DWT tanker contains two sets of ballast system for port and starboard sides, the ballast piping is arranged in cargo pump room 30 which belongs to category 1 hazardous area. Each set of ballast system is equipped with one ballast pump with rated flow of 2000 m 3 / h and one electrolytic ballast water management system with rated flow of 2000 m 3 / h. The ballast water management system uses DPD method TRO analyzer 12 which draws one branch from sampling line 14 into the instrument to measure the TRO concentration on line. During ballast, the electrolytic ballast water management system electrolyzes active substances with ballast water to disinfect and inactivate, which meets the requirements of IMO and port state for ballast water discharge. At the same time, the control system 15 starts the TRO sampling detection device, the control system 15 first powers on the fan and gas detector through the junction box 25, the fan sucks the air in the cabinet, and the combustible gas detector 16 monitors the concentration of dangerous gas in the cabinet to ensure the safety of the environment in the cabinet. When the fan runs for more than 1 minute and the combustible gas detector 16 does not trigger an alarm to monitor the concentration of dangerous gas in the cabinet, the control system 15 will power on other electrical components in the cabinet, including instruments and valves. After all the devices are powered on, the TRO sampling detection will begin. At this time, the system opens the remote control valve 24 on the sampling line 14 and the electromagnetic valve 23 on the compressed air 22 line of the sampling pump 13, and the sampling pump 13 starts to run to take water from the ballast line 26 into the cabin through the sampling water inlet, and the TRO analyzer 12 will start to measure and monitor the TRO concentration after being powered on. The water in the sampling line 14 returns to the ballast line 26 in the hazardous area through the sampling water return port. The waste water generated during the measurement of the TRO analyzer 12 will be discharged by gravity and returned to the discharge water collection tank 31 in the cargo pump room 30. After ballast is completed, the whole ballast water management system will stop running, and the crew should manually close the inlet and outlet manual valves of the sampling line 14 in the engine room 29, the control system 15 will close the remote control valve 24 of the sampling line 14 in the cabinet and the electromagnetic valve 23 of the compressed air 22 line, cutting off the water and air lines, and at the same time the TRO analyzer 12 will be powered off and stop working. The suction fan 17 and the combustible gas detector 16 will continue to run to monitor the concentration of dangerous gas in the cabinet in real time. When the fan runs for more than 5 minutes and the combustible gas detector 16 does not trigger an alarm to monitor the concentration of dangerous gas in the cabinet, the control system 15 will power off the fan, and the combustible gas detector 16 and the liquid level switch 19 will continue to monitor the concentration of dangerous gas in the cabinet and the possible liquid leakage in the cabinet. During unloading, the working process of the TRO sampling detection device is basically the same as that during ballast, but the device will take water from the unloading line 27 near the discharge port 28, and the sampling water will return to the unloading line 27. Here, the engine room 29 is a safe area, and the cargo pump room 30 is a hazardous area.

[0083] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. It should be understood by those skilled in the art that the disclosed range of the present application is not limited to the technical scheme formed by the specific combination of the above technical features, and should also cover other technical schemes formed by the combination of the above technical features or equivalent features without departing from the disclosed concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) with similar functions to form.

Claims

1. A TRO sampling detection device for hazardous areas of a ship, characterized in that, The device comprises airtight cabinet, TRO analyzer, sampling pump, sampling pipeline, control system, combustible gas detector, suction fan, wind pressure switch and liquid level switch; wherein: The sampling pump is used to drive the sampling water to flow from the flow inlet to the flow outlet of the sampling pipeline; The TRO analyzer is connected with the sampling pipeline and is used to detect the sampling water; The suction fan is installed on the top of the airtight cabinet, the suction inlet of the suction fan is located inside the airtight cabinet, the suction fan forms negative pressure by sucking air from the airtight cabinet, and the air sucked from the airtight cabinet is discharged to the safety area of the open deck of the ship through the air duct; The combustible gas detector is installed on the top inside the airtight cabinet and is used to monitor the combustible gas in the airtight cabinet, the combustible gas detector has analog signal output and on-off signal output; The wind pressure switch is installed in the airtight cabinet and is used to monitor the air pressure in the airtight cabinet; The liquid level switch is installed on the bottom inside the airtight cabinet and is used to monitor the liquid in the airtight cabinet; The electromagnetic valve is installed on the compressed air supply pipeline of the sampling pump and is used to control the start and stop of the sampling pump; The remote control valves are respectively arranged at the flow inlet and the backflow port of the sampling pipeline and are used to control the entry and backflow of the sampling water; The control system is electrically connected with each electrical component including the TRO analyzer, the sampling pump, the combustible gas detector, the suction fan, the wind pressure switch, the liquid level switch, the electromagnetic valve and the remote control valves, and is used to transmit and receive signals with each electrical component to control the TRO sampling detection of the device; The control system is used to perform the following steps: The control system first powers on the suction fan and the combustible gas detector through the junction box, the suction fan sucks air in the airtight cabinet, and the combustible gas detector monitors the concentration of dangerous gas in the airtight cabinet to ensure the safety environment in the airtight cabinet; When the suction fan runs for more than 1 minute and the combustible gas detector does not trigger an alarm when monitoring the concentration of dangerous gas in the airtight cabinet, the control system powers on other electrical components including instruments and valves in the airtight cabinet; After all the devices are powered on, the TRO sampling detection is started; The remote control valves on the sampling pipeline, the sampling pump and the electromagnetic valve on the compressed air supply pipeline are opened, the sampling pump starts to run and transports the ballast water in the dangerous area into the airtight cabinet through the sampling water flow inlet, the TRO analyzer starts to automatically sample and measure and monitor the TRO concentration after being powered on, and the water in the sampling pipeline returns to the ballast pipeline in the dangerous area through the sampling water backflow port.

2. The TRO sampling detection device for hazardous areas of a ship according to claim 1, characterized in that, The measurement method of the TRO analyzer includes one of the following: DPD colorimetric method, current method or oxidation-reduction potential method.

3. The TRO sampling detection device for hazardous areas of a ship according to claim 1, characterized in that, The airtight cabinet is made of metal material and coated with anticorrosive coating on the inner and outer surfaces.

4. The TRO sampling detection apparatus for hazardous areas of a ship according to claim 1, characterized in that, The protection grade of the airtight cabinet is not less than IP44.

5. The TRO sampling detection apparatus for hazardous areas of a ship according to claim 1, characterized in that, The shell of the airtight cabinet is provided with a transparent window.

6. The TRO sampling detection apparatus for hazardous areas of a ship according to claim 1, characterized in that, The sampling pump is a pneumatic diaphragm pump.

7. The TRO sampling detection apparatus for hazardous areas of a ship according to claim 1, characterized in that, The suction fan is a sparkless fan.

8. The TRO sampling detection apparatus for hazardous areas of a ship according to claim 1, characterized in that, The end of the air duct is designed in a swan neck type to prevent seawater from flowing into the air duct, and a fire-retardant net is installed at the end of the air duct.

9. The TRO sampling detection apparatus for hazardous areas of a ship according to claim 1, characterized in that, The control system is used to send an alarm or stop the operation of the device when it is determined that the device has a failure according to the combustible gas concentration, air pressure and liquid level information fed back by the combustible gas detector, the air pressure switch and the liquid level switch.

10. A vessel characterised in that, The TRO sampling detection device for a hazardous area of a ship comprises the device according to any one of claims 1 to 9.

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