Ship ballast water management system without hydrogen removal device and hydrogen treatment method thereof

Abstract

The application provides a ship ballast water management system without hydrogen removal device and a hydrogen treatment method thereof, and the system comprises a pressure regulating device, a filtering device, an electrolysis device, a detection and feedback device, an electric control equipment and a ballast tank; one end of the pressure regulating device is connected with a sea chest and one end of the filtering device respectively, and the other end of the pressure regulating device is connected with the ballast tank through one end of the detection and feedback device; the other end of the filtering device is connected with the other end of the detection and feedback device through the electrolysis device; the filtering device, the electrolysis device and the detection and feedback device are electrically connected with the electric control equipment; the ship ballast water management system without hydrogen removal device and the hydrogen treatment method thereof can optimize the setting of the system structure, improve the hydrogen removal efficiency of the system under the condition of the hydrogen removal device, guarantee the stability and safety of the system operation, simplify the control of the system, reduce the cost of the system, and guarantee the reliable operation of the system in the high-humidity and high-salt environment at sea.

Description

Technical Field

[0001] This invention relates to the field of ship ballast water treatment technology, and more specifically, to a ship ballast water management system without a hydrogen removal device and a hydrogen treatment method thereof. Background Technology

[0002] Branch-channel electrolysis, as a mature sterilization and inactivation technology, is widely used in ballast water treatment for ocean-going vessels. The branch-channel electrolysis ballast water management system involves drawing a small amount of seawater (typically about 1%-2% of the ballast pump flow rate) from the main ballast water line for electrolysis to produce the active substance TRO. This TRO is then injected back into the main ballast water line, mixing with the remaining 98%-99% of seawater to achieve sterilization and inactivation of the ballast water. The hydrogen gas produced by this system cannot dissolve in the electrolyte and escapes with the electrolyte flow.

[0003] To avoid hydrogen accumulation, existing branch-type electrolysis treatment systems generally employ hydrogen removal devices to separate, dilute, and safely discharge hydrogen (as disclosed in invention patents 202011348539.8 and 201910986067.X). Since the cost of hydrogen removal devices accounts for approximately 15%-20% of the total system cost, and the separation efficiency is typically 70%-80%, 20%-30% of the hydrogen still enters the ship's ballast water system untreated. This portion of hydrogen, which cannot completely dissolve in seawater, may escape and accumulate at higher levels in pipelines or equipment, posing a potential hazard.

[0004] Currently common hydrogen removal devices include one or more separators, dilution fans, fireproof vents, and other equipment such as air pressure or volume monitoring instruments, liquid level monitoring instruments, and hydrogen detectors. This often results in a large number of devices and complex control systems. Furthermore, due to the high humidity and high salinity environment at sea, the annual failure rate reaches 8%-12%, seriously affecting ship navigation safety and compliant emissions. Therefore, researching how to improve the hydrogen removal efficiency of ship ballast water management systems and reduce system costs without dedicated hydrogen removal devices is of great significance.

[0005] Patent CN107226516A discloses a process and apparatus for treating hydrogen, a byproduct of the electrolytic process in ship ballast water treatment. The process includes first separating the electrolyte discharged from a seawater electrolysis unit into a gas-liquid separation unit; then mixing the separated hydrogen with air in a hydrogen-air mixing unit to form an easily combustible mixture; drying the mixture using a dryer; and finally, burning the dried mixture in a burner. The apparatus includes a gas-liquid separation unit, a hydrogen-air mixing unit, a dryer, and a burner connected in sequence. In existing seawater electrolysis units, the outlet of the electrolyte (containing hydrogen) is connected to the inlet of the gas-liquid separation unit. While electrolysis allows for optimized device structure design, this structural design still tends to result in higher costs. Summary of the Invention

[0006] In view of this, the present invention aims to propose a ship ballast water management system and its hydrogen treatment method without a hydrogen removal device, in order to solve the problems of existing hydrogen removal devices having complex structures and low hydrogen removal efficiency. Including these devices within the ship ballast water management system leads to numerous internal devices, complex control, and, due to the high humidity and high salinity environment at sea, increases the annual failure rate of the system, affecting the safety of ship navigation. The present invention aims to optimize the system structure, improve the hydrogen removal efficiency without a hydrogen removal device, ensure the stability and safety of system operation, simplify system control, reduce system costs, and ensure reliable operation of the system even in the high humidity and high salinity environment at sea.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0008] This invention relates to a ship ballast water management system without a hydrogen removal device and a method for treating hydrogen therein. The system includes a pressure regulating device, a filtration device, an electrolysis device, a detection and feedback device, electrical control equipment, and a ballast tank. One end of the pressure regulating device is connected to the seagate and one end of the filtration device, respectively. The other end of the pressure regulating device is connected to the ballast tank through one end of the detection and feedback device. The other end of the filtration device is connected to the other end of the detection and feedback device through the electrolysis device. The filtration device, electrolysis device, and detection and feedback device are all electrically connected to the electrical control equipment. There are n electrolysis devices, where n is a positive integer (n≥2). All n electrolysis devices are connected in parallel.

[0009] Furthermore, the pressure regulating device includes a ballast pump, a first flow meter, and a regulating valve; one end of the ballast pump is connected to the seawater outlet of the subsea gate and the filter device through pipelines; the other end of the ballast pump is connected to the first flow meter, the regulating valve, and the detection and feedback device through pipelines in sequence.

[0010] Furthermore, the filtration device includes a seawater pump and a filter; one end of the seawater pump is connected to the seawater outlet of the seabed gate through a pipeline, and the other end of the seawater pump is connected to one end of the filter through a pipeline; the other end of the filter is connected to the electrolysis device through a pipeline; the power supply terminals of the seawater pump and the filter are both electrically connected to the electrical control equipment.

[0011] Furthermore, the electrolysis device includes a water distributor, an electrolysis unit, and a switching valve; one end of the water distributor is connected to or closed to a filter via a pipeline, and the other end of the water distributor is connected to one end of the electrolysis unit via a pipeline; the other end of the electrolysis unit is connected to the switching valve and a detection and feedback device in sequence via pipelines.

[0012] Furthermore, the water distributor includes a second regulating valve and a second flow meter; one end of the second regulating valve is connected to or closed to the filter via a pipeline; the other end of the second regulating valve is connected to the second flow meter and the electrolysis equipment in sequence via a pipeline.

[0013] Furthermore, the detection and feedback device includes a sensor assembly, a regulating three-valve, and a TRO detector; the power supply terminals of the sensor assembly and the regulating three-valve are both electrically connected to the electrical control equipment; one end of the sensor assembly is connected to or closed by a switching valve through a pipeline; the other end of the sensor assembly is connected to the regulating three-valve, the TRO detector, and the ballast tank in sequence through a pipeline.

[0014] Furthermore, the sensor assembly includes a temperature sensor and a pressure sensor; one end of the temperature sensor is connected to or closed by the switching valve, and the other end of the temperature sensor is connected to one end of the pressure sensor through a pipeline, and the other end of the pressure sensor is connected to the regulating three-valve; the power supply end of the pressure sensor is electrically connected to the electrical control equipment.

[0015] A method for hydrogen treatment in a ship ballast water management system without a hydrogen removal device, characterized in that it is applied to the aforementioned ship ballast water management system without a hydrogen removal device, and the method includes the following steps:

[0016] Step 1: After powering on the power supply equipment, set preset values ​​for the relevant data within the system;

[0017] Step 2: Determine the number of electrolysis units to be operated and the required water intake for each electrolysis unit based on the specifications of the ballast pump used.

[0018] Step 3: Monitor the status of each component in the system in real time and determine whether the actual operating pressure P of the system is greater than or equal to the preset target operating pressure value P0. If yes, proceed to step 4; otherwise, repeat step 3.

[0019] Step 4: Monitor the flow rate of individual devices in real time and determine whether the real-time flow rate Q of a single electrolysis device is greater than or equal to Q0. If yes, combine the active substance solutions produced by the single electrolysis device and inject them back into the main pipeline to mix with the other seawater in the main pipeline, and proceed to Step 5. If no, adjust the seawater flow rate through the second flow meter and regulating valve 2, and repeat Step 4.

[0020] Step 5: Use a TRO detector to monitor the concentration of active TRO in the mixed seawater of the main pipeline and branch pipeline in real time, and determine whether C2 ≥ C1 and the concentration of active TRO in the seawater to be entered into the tank is C ≥ C1. If yes, it meets the entry standard and can be entered into the tank normally; if no, adjust the power supply of the power supply equipment to adjust the concentration of active TRO in the seawater to be entered into the tank in real time, and repeat step 5.

[0021] Wherein, Q0 is the preset flow rate of a single electrolysis device; C1 is the preset minimum concentration of TRO active substance in the seawater to be introduced into the chamber; and C2 is the preset maximum concentration of TRO active substance in the seawater to be introduced into the chamber.

[0022] Compared with the prior art, the ship ballast water management system without hydrogen removal device and its hydrogen treatment method described in this invention have the following advantages:

[0023] By configuring the system, the system structure can be optimized, improving the hydrogen removal efficiency without a hydrogen removal device, ensuring the stability and safety of system operation, simplifying system control, reducing system costs, and ensuring reliable operation of the system in high-humidity and high-salt marine environments. Attached Figure Description

[0024] The accompanying drawings, which constitute a part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall system structure.

[0026] Explanation of reference numerals in the attached drawings: 1. Subsea gate; 100. Pressure regulating device; 2. Ballast pump; 3. First flow meter; 4. Regulating valve 1; 200. Filtration device; 8. Seawater pump; 9. Filter; 300. Electrolysis device; 301. Water distributor; 10. Regulating valve 2; 11. Second flow meter; 12. Electrolysis equipment; 13. Switch valve; 400. Detection and feedback device; 401. Sensor assembly; 14. Temperature sensor; 15. Pressure sensor; 16. Regulating valve 3; 5. TRO detector; 500. Electrical control equipment; 6. Ballast tank; 7. Ventilation head; 17. Control equipment; 18. Power supply equipment. Detailed Implementation

[0027] The inventive concepts of this disclosure will be described below using terminology commonly used by those skilled in the art to communicate the essence of their work to others skilled in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments described herein.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] In existing technologies, the branch-line electrolysis method works by extracting a small amount (typically about 1%-2%) of seawater. An electrochemical reaction occurs on the electrodes of the electrolysis equipment, producing the active substance TRO. This seawater solution containing the active substance is then injected into the main pipeline, mixing with the ballast water before entering the ballast tank. The bactericidal and inactivating properties of the active substance treat the ballast water, thus meeting the discharge standards of the Ballast Water Convention. Hydrogen, as a byproduct of this electrochemical reaction, is unavoidable. To treat hydrogen, current commercially available branch-line electrolysis ballast water treatment systems commonly employ hydrogen removal devices to separate, dilute, and discharge hydrogen. The cost of these devices accounts for approximately 15%-20% of the total system cost, and the separation efficiency is typically 70%-80%. This leaves 20%-30% of hydrogen untreated and entering the ship's ballast water system. This untreated hydrogen, unable to completely dissolve in seawater, may escape and accumulate at higher levels in pipelines or equipment, posing a potential hazard.

[0031] To address the problems of complex structures and low efficiency of existing hydrogen removal devices, which are often integrated into ship ballast water management systems, leading to numerous internal devices, complex control, and increased annual failure rates due to the high humidity and salinity of the marine environment, thus affecting ship navigation safety, this embodiment proposes a ship ballast water management system and its hydrogen treatment method without a hydrogen removal device. Specifically, it proposes a hydrogen treatment method and system for ship ballast water management systems based on branch-channel electrolysis, applicable to ballast water sterilization, inactivation, and safe discharge scenarios for various types of ocean-going vessels. Specifically, the system includes a pressure regulating device 100, a filtration device 200, an electrolysis device 300, a detection and feedback device 400, electrical control equipment 500, and a ballast tank 6. One end of the pressure regulating device 100 is connected to the seagate 1 and one end of the filtration device 200, respectively. The other end of the pressure regulating device 100 is connected to the ballast tank 6 through one end of the detection and feedback device 400. The other end of the filtration device 200 is connected to the other end of the detection and feedback device 400 through the electrolysis device 300. The filtration device 200, electrolysis device 300, and detection and feedback device 400 are all electrically connected to the electrical control equipment 500. There are n electrolysis devices 300, where n is a positive integer and n≥2. All n electrolysis devices 300 are connected in parallel. A vent head 7 is installed on the ballast tank 6. The vent head 7 is a hollow tube, with one end vertically mounted on the ballast tank 6 and the other end bent.

[0032] By optimizing the configuration of the various devices within the system, the system structure can be improved, enhancing hydrogen removal efficiency even without a dedicated hydrogen removal unit. This ensures system stability and safety, simplifies system control, reduces costs, and guarantees reliable operation in high-humidity, high-salt marine environments. Furthermore, it significantly simplifies the ballast water treatment system's structure, reduces the required floor space, saves costs, and improves system reliability.

[0033] The pressure regulating device 100 is located on the main pipeline of the system. The pressure regulating device 100 includes a ballast pump 2, a first flow meter 3, and a regulating valve 4. One end of the ballast pump 2 is connected to the seawater outlet of the subsea gate 1 and the filter device 200 via pipelines. The other end of the ballast pump 2 is connected to the first flow meter 3, the regulating valve 4, and the detection and feedback device 400 via pipelines.

[0034] The coordinated arrangement of ballast pump 2, first flow meter 3, and regulating valve 4 establishes a pathway between the subsea gate 1 and the detection and feedback device 400, serving as part of the system control loop. This primarily ensures the system's processing accuracy. The cooperation of the first flow meter 3 and regulating valve 4 prevents incomplete treatment, guaranteeing the system's precision and efficiency. The flow of seawater within the system can be flexibly adjusted according to actual needs. Furthermore, it continuously measures water quality to ensure compliance with treatment standards. In addition, it ensures the safe operation of the equipment. Real-time monitoring of the ballast pump 2's operating status prevents pump overpressure damage and monitors the backflow status of the water flow within the system, ensuring the stable operation of ballast pump 2 and the treatment equipment. This extends the system's service life and ensures user safety during system operation.

[0035] The filtration device 200, the electrolysis device 300, and the detection and feedback device 400 are all located on branches of the system.

[0036] The filtration device 200 includes a seawater pump 8 and a filter 9. One end of the seawater pump 8 is connected to the seawater outlet of the seabed gate 1 via a pipeline, and the other end of the seawater pump 8 is connected to one end of the filter 9 via a pipeline. The other end of the filter 9 is connected to the electrolysis device 300 via a pipeline. The power supply terminals of both the seawater pump 8 and the filter 9 are electrically connected to the electrical control equipment 500.

[0037] Through the coordinated arrangement of seawater pump 8 and filter 9, seawater pump 8 can precisely draw a small portion of seawater from the main pipeline, providing the electrolysis unit with the most suitable seawater. It can also overcome local resistance, providing sufficient pressure to overcome the local resistance introduced by components such as filter 9. Filter 9 performs preliminary filtration of the seawater entering the electrolysis unit 300, removing most impurities and marine organisms, preventing excessive plankton from entering the system and causing blockages that could affect system operation, thus providing direct physical protection. Furthermore, filter 9 maintains electrolysis efficiency, effectively removing impurities while preventing them from consuming the available chlorine produced during electrolysis, ensuring the disinfectant acts efficiently on the target organisms. In addition, filter 9 prevents impurities from depositing in pipelines or valves, reducing the risk of blockages, ensuring long-term stable system operation, and guaranteeing equipment operational stability.

[0038] The electrolysis device 300 includes a water distributor 301, an electrolysis unit 12, and a switching valve 13. One end of the water distributor 301 is connected to or closed by a pipeline to a filter 9, and the other end of the water distributor 301 is connected to one end of the electrolysis unit 12 via a pipeline. The other end of the electrolysis unit 12 is connected to the switching valve 13 and a detection and feedback device 400 via pipelines. The switching valve 13 is used to control the opening and closing of the pipeline between the electrolysis unit 12 and the detection and feedback device 400. The water distributor 301 includes a regulating valve 10 and a second flow meter 11. One end of the regulating valve 10 is connected to or closed by a pipeline to the filter 9. The other end of the regulating valve 10 is connected to the second flow meter 11 and the electrolysis unit 12 via pipelines. In this embodiment, n units of the water distributor 301, the electrolysis unit 12, and the switching valve 13 are provided. Each water distributor 301, electrolysis device 12, and switch valve 13 are connected in series to form a group of electrolysis devices 300, and the two ends of the n groups of electrolysis devices 300 are connected in parallel. Specifically, the ends of the n regulating valves 10 furthest from the electrolysis device 12 are connected in parallel, and the ends of the n switch valves 13 furthest from the electrolysis device 12 are connected in parallel.

[0039] By coordinating the water distributor 301 and the switching valve 13, the flexibility and control precision of the flow changes at the inlet and outlet of the electrolysis equipment 12 within the system can be effectively improved. This facilitates seawater mixing and monitoring while also enhancing the precision of branch electrolysis, thereby ensuring the safe discharge of treated seawater. Furthermore, without employing a dedicated hydrogen removal device, this application utilizes the solubility of hydrogen in seawater. By altering the structure of individual electrolysis equipment 12 and the combination of different electrolysis equipment 12, the core operating parameter of the system—the influent flow rate—can be changed. This allows the hydrogen produced by the electrolysis reaction to dissolve uniformly and completely in the increased, pressurized, or surplus seawater, achieving the effect of hydrogen treatment, even without a hydrogen removal device. This ensures that the branch electrolysis ballast water management system can achieve hydrogen treatment without the need for complex hydrogen removal devices, enabling safe sterilization and inactivation of ship ballast water, thus meeting the discharge standards of the Ballast Water Convention. In addition, the regulating valve 10 and the second flow meter 11 are installed at the water inlet of the electrolysis equipment 12 as a water distributor 301, which can accurately regulate the water volume, ensure the operational stability of the electrolysis equipment 12, and improve the efficiency of the electrolysis equipment 12.

[0040] It should be noted that, while maintaining the same number of electrolysis devices 12, this application modifies the structure of a conventional electrolytic cell, splitting multiple series-connected electrolytic active centers into n independent electrolysis devices 12 (n≥2). A water distributor 301 is added to the inlet of each electrolysis device 12 to ensure uniform water distribution within the device. The n series-connected electrolysis devices 12 are changed to a parallel connection, with each parallel device 12 having the same seawater inlet volume as the original branch system. This parallel connection increases the seawater volume in the branch system, thereby achieving the desired hydrogen dissolution and absorption. This results in a uniform distribution of hydrogen within the electrolysis devices 12.

[0041] The detection and feedback device 400 includes a sensor assembly 401, a regulating three-valve 16, and a TRO detector 5. The power supply terminals of both the sensor assembly 401 and the regulating three-valve 16 are electrically connected to the electrical control equipment 500. One end of the sensor assembly 401 is connected to or closed by a switching valve 13 via a pipeline. The other end of the sensor assembly 401 is connected sequentially to the regulating three-valve 16, the TRO detector 5, and the ballast chamber 6 via pipelines. The regulating three-valve 16 is used to control the opening and closing of the pipeline between the sensor assembly 401 and the TRO detector 5. The sensor assembly 401 includes a temperature sensor 14 and a pressure sensor 15. One end of the temperature sensor 14 is connected to or closed by the switching valve 13, and the other end of the temperature sensor 14 is connected to one end of the pressure sensor 15 via a pipeline. The other end of the pressure sensor 15 is connected to the regulating three-valve 16. The power supply terminal of the pressure sensor 15 is electrically connected to the electrical control equipment 500.

[0042] By combining the sensor assembly 401, the regulating three-valve 16, and the TRO detector 5, real-time monitoring of the system's operating status can be achieved, and feedback can be sent to the electrical control equipment 500. This enables precise and flexible control of the system under the action of the electrical control equipment 500.

[0043] The electrical control equipment 500 includes a control device 17 and a power supply device 18. One end of the control device 17 is electrically connected to the electrolysis equipment 12, and the other end of the control device 17 is electrically connected to one end of the power supply device 18. The other end of the power supply device 18 is electrically connected to the power supply terminals of the seawater pump 8, the filter 9, the regulating valve 10, the second flow meter 11, the pressure sensor 15, and the regulating valve 16, respectively.

[0044] By setting up control device 17 and power supply device 18, it is possible to achieve stable power supply to each component in the system, as well as to accurately control the seawater flow direction in the system, thereby improving the system's operational reliability and stability and ensuring the system's safe use.

[0045] A hydrogen treatment method for a ship ballast water management system without a hydrogen removal device, applied to the aforementioned ship ballast water management system without a hydrogen removal device, the method comprising the following steps:

[0046] Step 1: After powering on the power supply device 18, set the preset values ​​for the relevant data in the system;

[0047] Step 2: Based on the specifications of the ballast pump 2 used, determine the number of electrolysis devices 12 that need to be operated and the required water intake of each electrolysis device 12.

[0048] Step 3: Monitor the status of each component in the system in real time and determine whether the actual operating pressure P of the system is greater than or equal to the preset target operating pressure value P0. If yes, proceed to step 4; otherwise, repeat step 3.

[0049] Step 4: Monitor the flow rate of a single device in real time and determine whether the real-time flow rate Q of a single electrolysis device 12 is greater than or equal to Q0. If yes, combine the active substance solution produced by the single electrolysis device 12 and inject it back into the main pipeline to mix with the other seawater in the main pipeline, and proceed to Step 5. If no, regulate the seawater flow rate through the second flow meter 11 and the regulating valve 10, and repeat Step 4.

[0050] Step 5: Use the TRO detector 5 to monitor the concentration of active TRO in the mixed seawater of the main pipeline and branch pipeline in real time, and determine whether C2 ≥ C1 and the concentration of active TRO in the seawater to be entered is C1. If yes, it meets the entry standard and can be entered normally. If no, adjust the power supply of the power supply equipment 18 to adjust the concentration of active TRO in the seawater to be entered in real time, and repeat Step 5 to make it fall within the preset range of C1-C2 for the concentration of active TRO in the seawater to be entered, and then enter the tank normally.

[0051] Wherein, Q0 is the preset flow rate of a single electrolysis device 12; C1 is the preset minimum concentration of TRO active substance in the seawater to be introduced into the chamber; and C2 is the preset maximum concentration of TRO active substance in the seawater to be introduced into the chamber. The specific values ​​of P, Q, and C are based on actual monitoring results.

[0052] Specifically, in step one, the relevant data includes any one or more of the following: the system's target operating pressure, the preset flow rate of a single electrolysis unit 12, and the preset concentration range of the active substance TRO in the seawater to be introduced into the chamber. The preset concentration range of the active substance TRO in the seawater to be introduced into the chamber is C1-C2. The specific values ​​of P0, Q0, C1, and C2 are set according to requirements.

[0053] By implementing the aforementioned method, the equipment footprint can be reduced by 30%, the total system cost by 10%, the failure rate of the hydrogen removal process can be reduced to below 0.5%, and the discharge requirements of the International Ballast Water Management Convention can be met, resulting in significant economic and environmental benefits.

[0054] Working principle: By installing a seawater pump 8, pressure transmitter, or filter 9 at the inlet pipe of the branch line of the system, sufficient seawater can be provided to the system and the system pressure can be monitored to ensure that the system operating pressure is not lower than the set value; a second flow meter 11 and a flow regulating valve (i.e., regulating valve 10) are installed at the inlet of each electrolysis device 12 to ensure that the flow rate of a single electrolysis device 12 is not lower than the set value; the active substance TRO solution produced by a single electrolysis device 12 is collected and injected back into the main pipeline to mix with other seawater in the main pipeline; by installing a TRO detector 5 after the mixing point to monitor the concentration of active substance TRO in real time, the power supply of the power supply device 18 is adjusted to adjust the concentration of TRO in real time to keep it within the set range.

[0055] Step two includes:

[0056] Step S21: Determine the required amount of active material TRO and the corresponding maximum hydrogen production of the electrolysis equipment 12 based on the flow rate of the ballast pump 2.

[0057] Step S22: Determine the operating pressure of the system branch section based on the head of ballast pump 2;

[0058] Step S23: Based on the solubility of hydrogen in seawater at extreme seawater temperatures and specific operating pressures, calculate the maximum amount of seawater required to dissolve the maximum hydrogen production of the system, and after considering a 20% margin, calculate the amount of seawater required for the branch section of the system.

[0059] Step S24: Determine the number of electrolysis devices 12 and the required water intake of each electrolysis device 12 based on the required amount of active TRO material and the amount of seawater required for the branch sections of the system.

[0060] In step S23, the extreme seawater temperature is 50℃, the specific operating pressure is 0.3MPa, and the solubility in seawater is 1.58mg / L.

[0061] By configuring each step in step two, the accuracy of hydrogen processing in the system can be improved. Furthermore, the number of electrolysis devices 12 in operation can be adjusted according to the specifications of the selected ballast pump 2, thereby enhancing the stability and safety of the system. It also improves the flexibility and precision of system operation.

[0062] Example 1:

[0063] A certain 64,000 DWT bulk carrier includes two ballast pumps, each with a flow rate of 1000 m³ / h. 3 / h, with a head of 35m. One ballast water treatment system of this invention is installed on each of the ship's port and starboard sides. For example... Figure 1 As shown, on the main pipeline, seawater is drawn from the seagate 1 using ballast pump 2. The ballast water volume is monitored by the first flow meter 3, and the ballast water volume is adjusted by regulating valve 4 to ensure it does not exceed the set value of 1000m³. 3 / h;

[0064] On the branch line, seawater is drawn from the seabed gate 1 using a seawater pump 8. Particulate matter is removed by a filter 9 to prevent clogging of the electrolysis unit 12. A second flow meter 11 monitors the water inflow of each electrolysis unit 12, and a regulating valve 10 controls the inflow to ensure it does not fall below a set value. A power supply 18 supplies power to the electrolysis unit 12, causing an electrochemical reaction within the unit to produce active substances. Hydrogen produced as a byproduct dissolves in the seawater. A temperature sensor 14 monitors the electrolyte temperature, ensuring it does not exceed 50 degrees Celsius. A pressure sensor 15 monitors the system operating pressure and controls the opening of the regulating valve 16, ensuring the system pressure does not fall below the head of the ballast pump 2 (3.5 bar).

[0065] The active substance mixture containing completely dissolved hydrogen generated on the branch line is injected into the main line through the mixture injection pipe, where it mixes with a large amount of ballast water in the main line, further diluting the dissolved hydrogen. The TRO concentration on the main line is monitored by a TRO detector 5 to keep it within a set range, thereby achieving the effect of sterilization and inactivation and meeting the discharge requirements of the International Ballast Water Management Convention.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ship ballast water management system without a hydrogen removal device, characterized in that, It includes a pressure regulating device (100), a filter device (200), an electrolysis device (300), a detection and feedback device (400), an electrical control device (500), and a ballast tank (6); one end of the pressure regulating device (100) is connected to one end of the sea gate (1) and one end of the filter device (200), and the other end of the pressure regulating device (100) is connected to the ballast tank (6) through one end of the detection and feedback device (400); the other end of the filter device (200) is connected to the other end of the detection and feedback device (400) through the electrolysis device (300); the filter device (200), the electrolysis device (300), and the detection and feedback device (400) are all electrically connected to the electrical control device (500); wherein, n electrolysis devices (300) are provided, where n is a positive integer.

2. The ship ballast water management system without a hydrogen removal device according to claim 1, characterized in that, The n≥2.

3. A ship ballast water management system without a hydrogen removal device according to claim 2, characterized in that, The n electrolysis devices (300) are all connected in parallel in pairs.

4. A ship ballast water management system without a hydrogen removal device according to claim 1, characterized in that, The pressure regulating device (100) includes a ballast pump (2), a first flow meter (3), and a regulating valve (4); one end of the ballast pump (2) is connected to the seawater outlet of the seabed gate (1) and the filter device (200) through pipelines respectively; the other end of the ballast pump (2) is connected to the first flow meter (3), the regulating valve (4), and the detection and feedback device (400) in sequence through pipelines.

5. A ship ballast water management system without a hydrogen removal device according to claim 1, characterized in that, The filtration device (200) includes a seawater pump (8) and a filter (9); one end of the seawater pump (8) is connected to the seawater outlet of the seabed gate (1) through a pipeline, and the other end of the seawater pump (8) is connected to one end of the filter (9) through a pipeline; the other end of the filter (9) is connected to the electrolysis device (300) through a pipeline; the power supply terminals of the seawater pump (8) and the filter (9) are both electrically connected to the electrical control equipment (500).

6. A ship ballast water management system without a hydrogen removal device according to claim 5, characterized in that, The electrolysis device (300) includes a water distributor (301), an electrolysis device (12), and a switch valve (13); one end of the water distributor (301) is connected to or closed to the filter (9) through a pipeline, and the other end of the water distributor (301) is connected to one end of the electrolysis device (12) through a pipeline; the other end of the electrolysis device (12) is connected to the switch valve (13) and the detection and feedback device (400) in sequence through a pipeline.

7. A ship ballast water management system without a hydrogen removal device according to claim 6, characterized in that, The water distributor (301) includes a regulating valve (10) and a second flow meter (11); one end of the regulating valve (10) is connected to or closed by a filter (9) through a pipeline; the other end of the regulating valve (10) is connected to the second flow meter (11) and the electrolysis device (12) in sequence through a pipeline.

8. A ship ballast water management system without a hydrogen removal device according to claim 6, characterized in that, The detection and feedback device (400) includes a sensor assembly (401), a regulating three-valve (16), and a TRO detector (5); the power supply terminals of the sensor assembly (401) and the regulating three-valve (16) are electrically connected to the electrical control equipment (500); one end of the sensor assembly (401) is connected to or closed by the switching valve (13) through a pipeline; the other end of the sensor assembly (401) is connected to the regulating three-valve (16), the TRO detector (5), and the ballast tank (6) in sequence through a pipeline.

9. A ship ballast water management system without a hydrogen removal device according to claim 8, characterized in that, The sensor assembly (401) includes a temperature sensor (14) and a pressure sensor (15); one end of the temperature sensor (14) is connected to or closed by the switching valve (13), and the other end of the temperature sensor (14) is connected to one end of the pressure sensor (15) through a pipeline, and the other end of the pressure sensor (15) is connected to the regulating three-valve (16); the power supply end of the pressure sensor (15) is electrically connected to the electrical control equipment (500).

10. A method for hydrogen treatment in a ship ballast water management system without a hydrogen removal device, characterized in that, Applied to a ship ballast water management system without a hydrogen removal device according to any one of claims 1-9, the method comprises the following steps: Step 1: After powering on via the power supply equipment (18), preset values ​​are set for the relevant data in the system; Step 2: Determine the number of electrolysis devices (12) to be operated and the required water intake of each electrolysis device (12) according to the specifications of the ballast pump (2) used. Step 3: Monitor the status of each component in the system in real time and determine whether the actual operating pressure P of the system is greater than or equal to the preset target operating pressure value P0. If yes, proceed to step 4; otherwise, repeat step 3. Step 4: Monitor the flow rate of a single device in real time and determine whether the real-time flow rate Q of a single electrolysis device (12) is greater than or equal to Q0. If yes, combine the active substance solution produced by the single electrolysis device (12) and inject it back into the main pipeline to mix with the other seawater in the main pipeline and proceed to step 5. If no, adjust the seawater flow rate through the second flow meter (11) and the regulating valve (10) and repeat step 4. Step 5: Use the TRO detector (5) to monitor the concentration of active substance TRO in the mixed seawater of the main pipeline and branch pipeline in real time, and determine whether C2 ≥ C1 and the concentration of active substance TRO in the seawater to be entered is C ≥ C1; if yes, it meets the entry standard and can be entered normally; if no, adjust the power supply of the power supply equipment (18) to adjust the concentration of active substance TRO in the seawater to be entered in real time, and repeat step 5. Wherein, Q0 is the preset flow rate of a single electrolysis device (12); C1 is the preset minimum concentration of active substance TRO in the seawater to be entered; and C2 is the preset maximum concentration of active substance TRO in the seawater to be entered.

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