An intelligent anti-marine growth system for a semi-submersible platform or a bottom-founded platform

Abstract

The embodiment of the present application provides an intelligent anti-marine organism system for a semi-submersible platform or a bottom sitting platform, comprising an anti-marine organism device seawater pump, which is provided with a pressure sensor on an outlet side for measuring an outlet pressure signal, an electrolytic unit control box for converting the real-time outlet pressure signal into a total flow value based on a flow characteristic curve of the seawater pump, selecting a corresponding effective chlorine demand value in combination with a corresponding segmented flow range, generating electrolyte within an allowable concentration range through the electrolytic unit, and sending the electrolyte to a seawater valve box through a first branch remote control valve on the seawater valve box; each ballast tank is provided with a ballast filling and discharging pipe remote control valve, when any ballast filling and discharging pipe remote control valve is opened, the electrolytic unit control box compares and calculates a corresponding theoretical flow value of the fully opened ballast filling and discharging pipe remote control valve with a segmented flow table to determine a corresponding effective chlorine demand value, generates electrolyte within an allowable concentration range through the electrolytic unit, and sends the electrolyte to the ballast tank.

Description

Technical Field

[0001] This invention relates to the field of marine electrolytic biological defense systems, and in particular to an intelligent marine biological defense system for semi-submersible platforms or bottom-mounted platforms. Background Technology

[0002] In existing technologies, electrolytic anti-marine biological control systems for semi-submersible / bottom-mounted offshore platforms typically employ manual control of the valves at each outlet branch of the electrolysis unit, or input the remote control signals for the ballast water tank's ballast injection / discharge pipes into the anti-marine biological control box to synchronously open and close the remote control valves at each outlet branch of the electrolysis unit. The former significantly increases the operator's workload, making it easy to forget to open or close the corresponding valves, thus posing unnecessary risks to buoyancy control. The latter approach, using a constant current control method, ignores the actual water inflow into each ballast tank, which, over time, can accelerate the corrosion process of the internal structure of the ballast tank. Summary of the Invention

[0003] In view of the above-mentioned problems existing in the prior art, the present invention provides an intelligent marine biological protection system for semi-submersible platforms or bottom-mounted platforms. It adopts a relatively simple configuration, uses segmented flow ranges that can be adjusted according to actual conditions, and the remote control valves of each outlet branch of the electrolysis unit operate relatively smoothly. It has a high degree of automation, strong operability, system safety and reliability, minimal impact on hull structure corrosion, and wide applicability.

[0004] This invention provides an intelligent marine biological defense system for semi-submersible platforms or bottom-mounted platforms, comprising:

[0005] The seawater pump of the anti-marine biological control device has a pressure sensor installed on the outlet side of the main seawater pipe. This pressure sensor transmits the measured discharge pressure signal to the control box of the electrolysis unit.

[0006] The electrolysis unit control box converts the real-time discharge pressure signal into a total flow value based on the flow characteristic curve of the pump group including at least the seawater pump of the anti-marine biological device, and compares it with the pre-calculated segmented flow table. In the corresponding segmented flow range, it selects the corresponding first effective chlorine demand value, and then adjusts the interval electrolysis current of the electrolysis unit to generate the first electrolyte within the allowable concentration range. The first electrolyte is then sent to the seawater valve box through the first branch remote control valve on the seawater valve box drawn by the pump group including at least the seawater pump of the anti-marine biological device. The opening degree of the first branch remote control valve is determined based on the total flow value.

[0007] Multiple remote-controlled valves for ballast injection and discharge pipes are located in corresponding ballast water tanks. When any of these valves is opened for ballast operation, the opening signal is transmitted via the valve control box to the electrolysis unit control box (at this time, the electrolysis unit control box also receives an external system instruction that the ballast water tank will begin ballast operation).

[0008] The electrolysis unit control box is also used to compare and calculate the theoretical flow rate corresponding to the fully open ballast injection and discharge pipe remote control valve with the segmented flow meter. Within the corresponding segmented flow range, the corresponding second effective chlorine demand value is selected, and then the interval electrolysis current of the electrolysis unit is adjusted to generate the second electrolyte within the allowable concentration range. The second electrolyte is then delivered to the ballast pipe of the ballast water tank through the second branch remote control valve on the ballast water tank corresponding to the ballast injection and discharge pipe remote control valve. The opening degree of the second branch remote control valve is determined based on the theoretical flow rate value.

[0009] In some embodiments of the present invention, after the opening signal is transmitted to the electrolysis unit control box via the valve control box when any of the ballast injection and discharge pipe remote control valves is opened for ballast operation, the electrolysis unit control box is further used for:

[0010] The planned water intake of each ballast water tank is assessed according to the specific buoyancy operation plan, and parameters are converted based on relevant values. After the remote control valve of the ballast injection and discharge pipe of the ballast water tank with the operation plan is opened, the planned water intake obtained from the assessment is compared with the segmented flow table. Within the corresponding segmented flow range, the corresponding third effective chlorine requirement value is selected, and then the interval electrolysis current of the electrolysis unit is adjusted to generate the third electrolyte within the allowable concentration range. The third electrolyte is then delivered to the ballast water tank through the third branch remote control valve on the ballast water tank corresponding to the remote control valve of the ballast injection and discharge pipe. The opening degree of the third branch remote control valve is determined based on the planned water intake of the ballast water tank with the operation plan.

[0011] In some embodiments of the present invention, the available chlorine demand corresponding to the segmented flow ranges satisfies the following calculation formula.

[0012] B*b / a < A < B

[0013] Where A represents the lower limit of seawater flow rate within the permissible sodium hypochlorite concentration range, in m³ / s. 3 / h;

[0014] B represents the upper limit of seawater flow rate within the permissible sodium hypochlorite concentration range, in meters. 3 / h;

[0015] 'a' represents the upper limit of the permissible sodium hypochlorite concentration, taken as 0.5 ppm.

[0016] b is the design value for sodium hypochlorite concentration, taken as 0.3 ppm.

[0017] In some embodiments of the present invention, the required electrolysis current value within the interval A and B is calculated using the following formula:

[0018] I = G / (β*K)

[0019] In the formula,

[0020] I represents the electrolysis current, measured in amperes (A).

[0021] G is the required amount of available chlorine, G = seawater flow rate * design available chlorine concentration = B * b, with the unit being g / h;

[0022] β is the current efficiency, taken as 0.9;

[0023] K represents the theoretical energy production per ampere-hour, which is taken as 1.32.

[0024] In some embodiments of the present invention, the seawater pump of the anti-marine biological device is provided with a filter on the inlet side, the filter element material is stainless steel or other seawater corrosion resistant material, and the filter element precision is no more than 3mm.

[0025] The filter is equipped with operating valves on both the inlet and outlet pipes.

[0026] In some embodiments of the present invention, the seawater pump of the anti-marine organism device is a centrifugal pump, and the pump casing and impeller are made of materials resistant to seawater corrosion, and are matched with a variable frequency motor.

[0027] In some embodiments of the present invention, a shut-off check valve is provided on the pipeline connecting the outlet of the seawater pump of the anti-marine biological device to the electrolysis unit. The shut-off check valve is made of bronze or other materials resistant to seawater corrosion.

[0028] In some embodiments of the present invention, the electrolysis unit is connected to a ballast water tank or a seawater valve box via an electrolyte discharge pipe. The electrolyte discharge pipe has a branch remote-controlled valve on the side near the electrolysis unit and a side-mounted check valve at the end near the ballast water tank or the seawater valve box.

[0029] The electrolyte discharge pipe is made of stainless steel or at least carbon steel coated with plastic that is resistant to sodium hypochlorite corrosion.

[0030] The side-mounted shut-off check valve is made of stainless steel or cast steel lined with a corrosion-resistant material containing at least fluorine, such as cast steel lined with fluorine.

[0031] In some embodiments of the present invention, the segmented flow range is obtained by the following method:

[0032] The number of intelligent marine biological defense systems with segmented flow regulation will be determined based on the specific ship type layout and the variable frequency seawater cooling system.

[0033] The first total flow rate corresponding to the pump group (at least including the anti-marine biological device seawater pump) operating on each seawater main pipe in each variable frequency seawater cooling system is superimposed and calculated, and the second total flow rate corresponding to the ballast water tank after all the remote control valves of the ballast water tank injection and discharge pipes are opened. The first total flow rate is then evenly distributed to the seawater valve box corresponding to the variable frequency seawater pump. In this case, the pump group (at least including the anti-marine biological device seawater pump) pumping water in the same seawater valve box or the same group of seawater valve boxes is set as a group, and the first total flow rate of the pump group (at least including the anti-marine biological device seawater pump) in this group is evenly distributed to the seawater valve box in this group.

[0034] Based on the first total flow rate of each variable frequency seawater cooling system and the second total flow rate of the ballast tank ballast, the maximum total amount of seawater that the electrolytic marine biological defense system needs to process is calculated by superimposing the data.

[0035] The total seawater volume from 0 to the maximum volume is segmented, and the number of segments and flow ranges are determined based on the project requirements.

[0036] Based on the determined number of segments and flow ranges, a segmented flow table is compiled and the relevant information is synchronized to the electrolysis unit control box. When there is an inflow flow requirement for the seawater valve box or ballast water tank, the electrolysis unit control box compares the flow value converted from the pressure signal and / or the theoretical flow value corresponding to the fully open ballast injection and discharge pipe remote control valve with the pre-calculated segmented flow table, substitutes it into the appropriate segmented flow range, selects the corresponding effective chlorine requirement value, and then adjusts the interval electrolysis current of the electrolysis unit to generate electrolyte within the allowable concentration range. The electrolyte is then delivered to the corresponding seawater valve box through the first branch remote control valve corresponding to the seawater valve box with flow requirement and / or delivered to the ballast water tank through the second branch remote control valve on the ballast water tank corresponding to the ballast injection and discharge pipe remote control valve.

[0037] In some embodiments of the present invention, if, when calculating the maximum total seawater volume, there are seawater pumps that are not part of the variable frequency seawater cooling system, including at least a ballast pump or a fire pump, pumping water, the maximum total seawater volume is calculated by superimposing the rated flow rates of the ballast pump or the fire pump.

[0038] Compared with the prior art, the beneficial effects of the intelligent marine biological protection system for semi-submersible platforms or bottom-mounted platforms provided by the embodiments of the present invention are as follows: it adopts a relatively simple configuration, uses segmented flow ranges that can be adjusted according to actual conditions, the remote control valves of each outlet branch of the electrolysis unit operate relatively smoothly, it has a high degree of automation, strong operability, the system is safe and reliable, has little impact on the corrosion of the hull structure, and has a wide range of applications. Attached Figure Description

[0039] Figure 1 This is a schematic diagram illustrating the principle of an intelligent marine biological defense system for semi-submersible or bottom-mounted platforms, provided in an embodiment of the present invention.

[0040] Figure Labels

[0041] 1. Main seawater pipe; 2. Operating valve; 3. Filter; 4. Seawater pump for anti-marine organism device; 5. Pressure sensor; 6. Stop check valve; 7. Electrolysis unit; 8. Electrolysis unit control box; 9. Branch remote control valve; 10. Electrolyte discharge pipe; 11. Side stop check valve; 12. Ballast water tank; 13. Seawater valve box; 14. Suction port; 15. Remote control valve for ballast water tank ballast injection / discharge pipe; 16. Ballast water tank ballast injection / discharge pipe; 17. Valve control box. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0044] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0045] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0046] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0047] Specific embodiments of this application are described below with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to ascertain the true intent based on the user's historical operations, and to avoid unnecessary or redundant details that would obscure this application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in various ways with substantially any suitable detailed structure.

[0048] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0049] This invention provides an intelligent marine biological defense system for semi-submersible or bottom-mounted platforms, such as... Figure 1 As shown, it includes:

[0050] The seawater pump 4 of the anti-marine biological device has a pressure sensor 5 installed on the outlet side of the seawater main pipe 1. The pressure sensor 5 is used to send the measured discharge pressure signal to the electrolysis unit control box 8.

[0051] The electrolysis unit control box 8 converts the real-time discharge pressure signal into a total flow value based on the flow characteristic curve of the pump group including at least the seawater pump 4 of the anti-marine biological device, and compares it with the pre-calculated segmented flow table. In the corresponding segmented flow range, the corresponding first effective chlorine demand value is selected, and then the interval electrolysis current of the electrolysis unit 7 is adjusted to generate the first electrolyte within the allowable concentration range. The first electrolyte is sent to the seawater valve box 13 through the first branch remote control valve on the seawater valve box 13 drawn by the pump group including at least the seawater pump 4 of the anti-marine biological device. The opening degree of the first branch remote control valve is determined based on the total flow value.

[0052] Multiple ballast injection / discharge remote control valves 15 are located in corresponding ballast water tanks 12. When any of the ballast injection / discharge remote control valves 15 is opened, the opening signal is transmitted to the electrolysis unit control box 8 via the valve control box 17 (at this time, the electrolysis unit control box also receives an instruction from the external system that the ballast water tank will perform ballast operations).

[0053] The electrolysis unit control box 8 is also used to compare and calculate the theoretical flow rate corresponding to the fully open ballast injection / discharge pipe remote control valve 15 with the segmented flow meter. Within the corresponding segmented flow range, it selects the corresponding second effective chlorine demand value, and then adjusts the interval electrolysis current of the electrolysis unit 7 to generate a second electrolyte within the allowable concentration range. The second electrolyte is then delivered to the ballast water tank 12 via the second branch remote control valve 9 on the ballast water tank 12 corresponding to the ballast injection / discharge pipe remote control valve 15. The opening degree of the second branch remote control valve 9 is determined based on the theoretical flow rate value. Simultaneously, during ballast water tank operation, water is injected through the suction port 14 via the ballast injection / discharge pipe remote control valve 15 and the ballast injection / discharge pipe 16.

[0054] As can be seen from the above technical solutions, the electrolytic anti-marine biological control system addresses the problem in existing technologies where the use of stepless flow regulation leads to frequent operation of the remote control valves 9 at each outlet branch of the electrolysis unit 7, significantly increasing the failure rate of the relevant remote control valves, affecting the normal use of the system, and increasing the cost of ship operation and maintenance. Furthermore, it also solves the problem of manually controlled electrolytic anti-marine biological control systems for semi-submersible / bottom-mounted offshore platforms, which greatly increases the workload of operators, making it easy to forget to open or close the corresponding valves, thus posing unnecessary risks to the floating and sinking operations. Additionally, it addresses the problem that electrolytic anti-marine biological control systems for semi-submersible / bottom-mounted offshore platforms using constant current control ignore the actual water inflow into each ballast tank, which, over time, can easily accelerate the corrosion process of the internal structure of the ballast tank.

[0055] In some embodiments of the present invention, after the opening signal is transmitted to the electrolysis unit control box 8 via the valve control box 17 when any of the ballast injection pipe remote control valves 15 is opened, the electrolysis unit control box 8 is further used for:

[0056] The planned water intake of each ballast water tank 12 is assessed according to the specific buoyancy operation plan, and parameters are converted based on relevant values. After the remote control valve 15 of the ballast injection and discharge pipe of the ballast water tank 12 with the operation plan is opened, the planned water intake obtained from the assessment is compared with the segmented flow table. Within the corresponding segmented flow range, the corresponding third effective chlorine requirement value is selected, and then the interval electrolysis current of the electrolysis unit 7 is adjusted to generate the third electrolyte within the allowable concentration range. The third electrolyte is then sent to the ballast water tank 12 through the third branch remote control valve on the ballast water tank 12 corresponding to the ballast injection and discharge pipe remote control valve 15. The opening degree of the third branch remote control valve is determined based on the planned water intake of the ballast water tank 12 with the operation plan.

[0057] Furthermore, in this embodiment, the outlet pressure signal of the variable frequency seawater pump can also be used as input data, or real-time flow parameters or other parameters that can be converted into flow parameters can be directly obtained by setting a flow meter or other methods, depending on the actual situation of the project.

[0058] Furthermore, in the above embodiments, to facilitate understanding of the above technical solutions, specific examples are provided below for illustration, in conjunction with... Figure 1As shown, if there are multiple ballast water tanks 12, specifically three, the ballast injection and discharge pipe remote control valves 15 corresponding to the three ballast water tanks 12 can be opened to different degrees for operation, such as 100%, 100%, and 0% opening, or 100%, 0%, and 100% opening, etc., without explicit limitation. Among them, the ballast valves of semi-submersible platforms or bottom-mounted platforms are generally 100% or 0% on / off valves. Furthermore, when supplying electrolyte to the ballast water tank 12 in operation, the opening degree of the second branch remote control valve 9 corresponding to the ballast water tank 12 in operation is determined based on the theoretical flow rate value corresponding to the opening degree of the ballast injection and discharge pipe remote control valve 15 of the ballast water tank 12.

[0059] In some embodiments of the present invention, the available chlorine demand corresponding to the segmented flow ranges satisfies the following calculation formula.

[0060] B*b / a < A < B

[0061] Where A represents the lower limit of seawater flow rate within the permissible sodium hypochlorite concentration range, in m³ / s. 3 / h;

[0062] B represents the upper limit of seawater flow rate within the permissible sodium hypochlorite concentration range, in meters. 3 / h;

[0063] 'a' represents the upper limit of the permissible sodium hypochlorite concentration, taken as 0.5 ppm.

[0064] b is the design value for sodium hypochlorite concentration, taken as 0.3 ppm. In actual use, the minimum value of b can be 0.1 ppm, but the preferred value is 0.3 ppm.

[0065] In some embodiments of the present invention, the required electrolysis current value within the interval A and B is calculated using the following formula:

[0066] I = G / (β*K)

[0067] In the formula,

[0068] I represents the electrolysis current, measured in amperes (A).

[0069] G is the required amount of available chlorine, G = seawater flow rate * design available chlorine concentration = B * b, with the unit being g / h;

[0070] β is the current efficiency, taken as 0.9;

[0071] K represents the theoretical energy production per ampere-hour, which is taken as 1.32.

[0072] In this embodiment, the seawater pump 4 of the anti-marine organism device is provided with a filter 3 at the inlet side. The filter element is made of stainless steel or other seawater corrosion resistant materials, and the filter element precision is no more than 3mm. Preferably, the filter element precision can be 2mm.

[0073] The filter 3 is equipped with operating valves 2 on both the inlet and outlet pipes.

[0074] In some embodiments of the present invention, the seawater pump 4 of the anti-marine organism device is a centrifugal pump, and the pump casing and impeller are made of materials resistant to seawater corrosion, and are matched with a variable frequency motor.

[0075] In some embodiments of the present invention, a shut-off check valve 6 is provided on the pipe connecting the outlet of the seawater pump 4 of the anti-marine biological device to the electrolysis unit 7. The shut-off check valve 6 is made of bronze or other materials resistant to seawater corrosion.

[0076] In some embodiments of the present invention, the electrolysis unit 7 is connected to the ballast water tank 12 or the seawater valve box 13 via an electrolyte discharge pipe 10. The electrolyte discharge pipe 10 is provided with a branch remote control valve 9 on the side near the electrolysis unit 7, and a side-side check valve 11 and a stop check valve 6 are provided at the end near the ballast water tank 12 or the seawater valve box 13.

[0077] The electrolyte discharge pipe 10 is made of stainless steel or at least carbon steel coated with plastic that is resistant to sodium hypochlorite corrosion.

[0078] The side-mounted shut-off check valve 11 and shut-off check valve 6 are made of stainless steel or cast steel lined with a corrosion-resistant material containing at least fluorine, such as cast steel lined with fluorine.

[0079] In some embodiments of the present invention, the segmented flow range is obtained by the following method:

[0080] The number of intelligent marine biological defense systems with segmented flow regulation will be determined based on the specific ship type layout, variable frequency seawater cooling system, and ballast water tank conditions.

[0081] The first total flow rate corresponding to the pump group (at least the anti-marine biological device seawater pump 4) operating on each seawater main pipe 1 in each variable frequency seawater cooling system is superimposed and calculated, and the second total flow rate corresponding to the ballast injection and discharge pipe remote control valves 15 of all ballast water tanks 12 are opened. The first total flow rate is then evenly distributed to the seawater valve box 13 corresponding to the variable frequency seawater pump. In this case, the pump groups (at least the anti-marine biological device seawater pump 4) pumping water in the same seawater valve box 13 or the same group of seawater valve boxes 13 are set as a group, and the first total flow rate of the pump groups (at least the anti-marine biological device seawater pump 4) in this group is evenly distributed to the seawater valve box 13 in this group.

[0082] Based on the first total flow rate of each variable frequency seawater cooling system and the second total flow rate of the required ballast water tank, the maximum total amount of seawater that the electrolytic marine biological defense system needs to process is calculated by superimposing the data.

[0083] The total seawater volume from 0 to the maximum volume is segmented, and the number of segments and flow ranges are determined based on the project requirements.

[0084] Based on the determined number of segments and flow ranges, a segmented flow table is compiled and the relevant information is synchronized to the electrolysis unit control box 8. When there is a flow demand in the seawater valve box 13 or the ballast water tank 12, the electrolysis unit control box 8 compares the flow value converted from the pressure signal and / or the theoretical flow value corresponding to the fully open ballast injection and discharge pipe remote control valve 15 with the pre-calculated segmented flow table, substitutes it into the appropriate segmented flow range, selects the corresponding effective chlorine demand value, and then adjusts the interval electrolysis current of the electrolysis unit 7 to generate electrolyte within the allowable concentration range. The electrolyte is then delivered to the corresponding seawater valve box 13 through the first branch remote control valve corresponding to the seawater valve box 13 with flow demand and / or delivered to the ballast water tank 12 through the second branch remote control valve 9 on the ballast water tank 12 corresponding to the ballast injection and discharge pipe remote control valve 15.

[0085] In some embodiments of the present invention, if, when calculating the maximum total seawater volume, there are seawater pumps that are not part of the variable frequency seawater cooling system, including at least a ballast pump or a fire pump, pumping water, the maximum total seawater volume is calculated by superimposing the rated flow rates of the ballast pump or the fire pump.

[0086] Compared with the prior art, the beneficial effects of the intelligent marine biological protection system for semi-submersible platforms or bottom-mounted platforms provided by the embodiments of the present invention are as follows: it adopts a relatively simple configuration, adopts a segmented flow range that can be adjusted according to actual conditions, the remote control valves 9 of each outlet branch of the electrolysis unit 7 operate relatively smoothly, it has a high degree of automation, strong operability, the system is safe and reliable, has little impact on the corrosion of the hull structure, and has a wide range of applications.

[0087] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A smart marine biological defense system for semi-submersible or bottom-mounted platforms, characterized in that, include: The seawater pump of the anti-marine biological control device is arranged on the main seawater pipe and has a pressure sensor on the outlet side. The pressure sensor is used to send the measured discharge pressure signal to the control box of the electrolysis unit. The electrolysis unit control box converts the real-time discharge pressure signal into a total flow value based on the flow characteristic curve of the seawater pump of the anti-marine biological device, and compares it with the pre-calculated segmented flow table. Within the corresponding segmented flow range, it selects the corresponding first effective chlorine demand value, and then adjusts the interval electrolysis current of the electrolysis unit to generate the first electrolyte within the allowable concentration range. The first electrolyte is then delivered to the seawater valve box through the first branch remote control valve on the seawater valve box drawn by the seawater pump of the anti-marine biological device. The opening degree of the first branch remote control valve is determined based on the total flow value and the number of seawater valve boxes with corresponding flow demand. Multiple remote-controlled valves for ballast injection and discharge pipes are provided, each located in a corresponding ballast water tank. When any of these valves is opened, the opening signal is transmitted via the valve control box to the electrolysis unit control box. The electrolysis unit control box is also used to compare and calculate the theoretical flow rate value corresponding to the fully open ballast injection and discharge pipe remote control valve with the segmented flow meter. Within the corresponding segmented flow range, the corresponding second effective chlorine demand value is selected, and then the interval electrolysis current of the electrolysis unit is adjusted to generate the second electrolyte within the allowable concentration range. The second electrolyte is then delivered to the ballast water tank through the second branch remote control valve on the ballast water tank corresponding to the ballast injection and discharge pipe remote control valve. The opening degree of the second branch remote control valve is determined based on the theoretical flow rate value. When any of the ballast injection and discharge pipe remote control valves is opened, the opening signal is transmitted to the electrolysis unit control box via the valve control box. The electrolysis unit control box is further used for: The planned water intake of each ballast water tank is assessed according to the specific buoyancy operation plan, and parameters are converted based on relevant values. After the remote control valve of the ballast injection and discharge pipe of the ballast water tank with the operation plan is opened, the planned water intake obtained from the assessment is compared with the segmented flow table. Within the corresponding segmented flow range, the corresponding third effective chlorine requirement value is selected, and then the interval electrolysis current of the electrolysis unit is adjusted to generate the third electrolyte within the allowable concentration range. The third electrolyte is then sent to the ballast water tank through the third branch remote control valve on the ballast water tank corresponding to the remote control valve of the ballast injection and discharge pipe. The opening degree of the third branch remote control valve is determined based on the planned water intake of the ballast water tank with the operation plan. The available chlorine demand corresponding to the segmented flow ranges satisfies the following calculation formula. B*b / a < A < B Where A represents the lower limit of seawater flow rate within the permissible sodium hypochlorite concentration range, in m³ / s. 3 / h; B represents the upper limit of seawater flow rate within the permissible sodium hypochlorite concentration range, in meters. 3 / h; 'a' represents the upper limit of the permissible sodium hypochlorite concentration, taken as 0.5 ppm. b is the design value for sodium hypochlorite concentration, taken as 0.3 ppm; Within the interval between A and B, the required electrolysis current is calculated using the following formula: I = G / (β * K) In the formula, I represents the electrolysis current, measured in amperes (A). G is the required amount of available chlorine, G = seawater flow rate * design available chlorine concentration = B * b, with the unit being g / h; β is the current efficiency, taken as 0.9; K represents the theoretical energy production per ampere-hour, which is taken as 1.

32.

2. The intelligent marine biological defense system for semi-submersible platforms or bottom-mounted platforms according to claim 1, characterized in that, The seawater pump of the anti-marine biological device is equipped with a filter on the inlet side. The filter element is made of stainless steel and the filter element precision is no more than 3mm. The filter is equipped with operating valves on both the inlet and outlet pipes.

3. The intelligent marine biological defense system for semi-submersible platforms or bottom-mounted platforms according to claim 1, characterized in that, The seawater pump of the anti-marine biological device is a centrifugal pump. The pump casing and impeller are made of materials resistant to seawater corrosion, and it is equipped with a variable frequency motor.

4. The intelligent marine biological defense system for semi-submersible platforms or bottom-mounted platforms according to claim 1, characterized in that, The outlet of the seawater pump of the anti-marine biological device is connected to the electrolysis unit via a shut-off check valve made of bronze.

5. The intelligent marine biological defense system for semi-submersible platforms or bottom-mounted platforms according to claim 1, characterized in that, The electrolysis unit is connected to the ballast water tank or seawater valve box via an electrolyte discharge pipe. The electrolyte discharge pipe has a branch remote-controlled valve on the side near the electrolysis unit and a side-side check valve at the end near the ballast water tank's ballast injection / discharge pipe or the seawater valve box. The electrolyte discharge pipe is made of stainless steel or at least carbon steel coated with plastic that is resistant to sodium hypochlorite corrosion. The side-mounted shut-off check valve is made of stainless steel or cast steel lined with a corrosion-resistant material containing at least fluorine.

6. The intelligent marine biological defense system for semi-submersible platforms or bottom-mounted platforms according to claim 1, characterized in that, The segmented flow range is obtained through the following method: The number of intelligent marine biological defense systems with segmented flow regulation will be determined based on the specific ship type layout, variable frequency seawater cooling system, and ballast tank conditions. The first total flow rate corresponding to the seawater pumps of the anti-marine organism device operating on each seawater main pipe in each variable frequency seawater cooling system is superimposed and calculated, as well as the second total flow rate corresponding to the ballast water tanks whose ballast injection and discharge pipe remote control valves are all opened. The first total flow rate is then evenly distributed to the seawater valve boxes corresponding to the variable frequency seawater pumps. The anti-marine organism device seawater pumps that pump water from the same seawater valve box or the same group of seawater valve boxes are set as a group, and the first total flow rate of the anti-marine organism device seawater pumps in the group is evenly distributed to the seawater valve boxes in the group. Based on the first total flow rate of each variable frequency seawater cooling system and the second total flow rate of the ballast tank ballast, the maximum total amount of seawater that the electrolytic marine biological defense system needs to process is calculated by superimposing the data. The total seawater volume from 0 to the maximum volume is segmented, and the number of segments and flow ranges are determined based on the project requirements. Based on the determined number of segments and flow ranges, a segmented flow table is compiled and the relevant information is synchronized to the electrolysis unit control box. When there is an inflow flow requirement for the seawater valve box or ballast water tank, the electrolysis unit control box compares the flow value converted from the pressure signal and / or the theoretical flow value corresponding to the fully open ballast injection and discharge pipe remote control valve with the pre-calculated segmented flow table, substitutes it into the appropriate segmented flow range, selects the corresponding effective chlorine requirement value, and then adjusts the interval electrolysis current of the electrolysis unit to generate electrolyte within the allowable concentration range. The electrolyte is then delivered to the corresponding seawater valve box through the first branch remote control valve corresponding to the seawater valve box with flow requirement and / or delivered to the ballast water tank ballast discharge pipe through the second branch remote control valve on the ballast water tank corresponding to the ballast injection and discharge pipe remote control valve.

Images