Offshore hydrogen production multifunctional platform water supply system and integrated skid device

Abstract

The invention relates to an offshore hydrogen production multifunctional platform water supply system and an integrated skid device. The water supply system comprises a seawater lifting unit, a reverse osmosis water making unit, a pure water making unit and a constant-pressure pure water supply unit. The seawater lifting unit comprises a submersible pump and a hose winch. The reverse osmosis water making unit comprises a first pump body, a multi-stage reverse osmosis membrane assembly and a fresh water tank, seawater is pumped to the multi-stage reverse osmosis membrane assembly through the first pump body to be desalted, and desalted fresh water enters the fresh water tank. And the pure water preparation unit comprises a second pump body, an EDI device and a pure water tank. The constant-pressure pure water supply unit comprises a third pump body, a pressure stabilizing tank and a pure water tank, and pure water in the pure water tank is pumped into the pressure stabilizing tank through the third pump body, is subjected to pressure stabilization through the pressure stabilizing tank and enters the pure water tank. The water supply system can supply pure water for hydrogen production to the platform hydrogen production module, can also supply fresh water to platform fresh water users, and can meet the use requirements of fresh water and pure water of the offshore hydrogen production multifunctional platform.

Description

Technical Field

[0001] The present invention relates to the technical field of marine platforms, and in particular to a water supply system and an integrated skid device for a multifunctional offshore hydrogen production platform. Background Art

[0002] Hydrogen energy is a zero-carbon, high calorific value, multi-purpose energy source, and a sustainable secondary clean energy source. Hydrogen production in marine equipment and its related functional platforms such as ammonia production and alcohol production are also being actively researched and explored. Offshore hydrogen production uses green electricity such as photovoltaic and wind power as electricity, and produces pure water for hydrogen production through seawater reverse osmosis desalination technology and EDI (electrodeionization technology).

[0003] Among them, pure water for hydrogen production needs to be continuously and automatically supplied to ensure the stable operation of the electrolyzer and the efficiency of hydrogen production. In addition, desalted water (fresh water after reverse osmosis) is also needed in the functional modules such as ammonia production and alcohol production related to hydrogen production on the platform. Therefore, it is urgent to provide a water supply system that can meet the demand for fresh water and pure water for the offshore hydrogen production multifunctional platform. Summary of the invention

[0004] One purpose of the present invention is to solve the deficiencies in the prior art and provide a water supply system for an offshore hydrogen production multifunctional platform. To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A water supply system for an offshore hydrogen production multifunctional platform, comprising:

[0006] A seawater lifting unit, which includes a submersible pump and a hose winch, and the submersible pump pumps seawater to the main deck of the platform through the hose winch;

[0007] A reverse osmosis water generating unit is arranged on the main deck of the platform. The reverse osmosis water generating unit comprises a first pump body, a multi-stage reverse osmosis membrane assembly and a fresh water tank. Seawater is pumped to the multi-stage reverse osmosis membrane assembly through the first pump body for desalination, and the desalinated fresh water enters the fresh water tank;

[0008] A pure water production unit is arranged on the main deck of the platform. The pure water production unit comprises a second pump body, an EDI device and a pure water tank. Fresh water in the fresh water tank is pumped into the EDI device through the second pump body, and pure water treated by the EDI device enters the pure water tank;

[0009] A constant pressure pure water supply unit is arranged on the main deck of the platform. The constant pressure pure water supply unit comprises a third pump body, a pressure stabilizing tank and a pure water tank. The pure water in the pure water tank is pumped into the pressure stabilizing tank through the third pump body, and the pressure is stabilized by the pressure stabilizing tank and enters the pure water tank. The pure water tank is used to supply pure water to the platform hydrogen production module.

[0010] In one embodiment, the multi-stage reverse osmosis membrane assembly includes a primary reverse osmosis membrane group and a secondary reverse osmosis membrane group, the primary reverse osmosis membrane group is used to receive seawater pumped into the first pump body and desalinate, and the water produced by the primary reverse osmosis membrane group enters the secondary reverse osmosis membrane group for desalination again;

[0011] The reverse osmosis water production unit also includes a first flow sensor and a second flow sensor, the first flow sensor is arranged at the water outlet end of the first-stage reverse osmosis membrane group, and the second flow sensor is arranged at the water outlet end of the second-stage reverse osmosis membrane group;

[0012] The first pump body is a variable frequency high pressure pump, and the first pump body can automatically adjust the water intake of seawater according to the flow signal detected by the first flow sensor and / or the second flow sensor.

[0013] In one embodiment, the reverse osmosis water production unit further includes an intermediate water tank connected between the primary reverse osmosis membrane group and the secondary reverse osmosis membrane group, and the intermediate water tank is used to temporarily store water produced by the primary reverse osmosis membrane group.

[0014] In one embodiment, the reverse osmosis water production unit further includes a fourth pump body, which is disposed between the intermediate water tank and the secondary reverse osmosis membrane group.

[0015] In one embodiment, the reverse osmosis water production unit includes multiple first pressure sensors, which are respectively arranged at the water inlet and water outlet of the first reverse osmosis membrane group and the water inlet and water outlet of the second reverse osmosis membrane group.

[0016] In one embodiment, the reverse osmosis water production unit includes a first conductivity meter sensor and a second conductivity meter sensor, the first conductivity meter sensor is arranged at the water outlet end of the first reverse osmosis membrane group, and the second conductivity meter sensor is arranged at the water outlet end of the second reverse osmosis membrane group.

[0017] In one embodiment, the reverse osmosis water production unit includes a first backwash component and a second backwash component, and the first backwash component and the second backwash component are respectively arranged corresponding to the primary reverse osmosis membrane group and the secondary reverse osmosis membrane group. The first backwash component is used to backwash the primary reverse osmosis membrane group, and the second backwash component is used to backwash the secondary reverse osmosis membrane group.

[0018] In one embodiment, the inlet end and the outlet end of the first pump body are respectively connected to a low-pressure hose and a high-pressure hose, and water enters the first pump body through the low-pressure hose and water exits through the high-pressure hose.

[0019] In one embodiment, the water supply system also includes a seawater pretreatment unit, which is arranged between the seawater lifting unit and the reverse osmosis water production unit. The seawater pretreatment unit includes a primary filter and a secondary filter. The seawater output by the seawater lifting unit passes through the primary filter and the secondary filter in sequence, and is pumped to the multi-stage reverse osmosis membrane assembly through the first pump body.

[0020] In one embodiment, a first detection sensor group is provided at the outlet end of the second pump body, and the first detection sensor group is used to detect the pressure, conductivity and flow rate of the water discharged from the second pump body;

[0021] The EDI device has a pure water outlet and a concentrated water outlet, the pure water outlet is connected to the pure water tank, and the concentrated water outlet is connected to the reverse osmosis water production unit;

[0022] A second detection sensor group is provided at the pure water outlet, and the second detection sensor group is used to detect the pressure, conductivity and flow rate of the pure water output from the pure water outlet;

[0023] A third detection sensor group is provided at the concentrated water outlet, and the third detection sensor group is used to detect the pressure and flow rate of the concentrated water output from the concentrated water outlet.

[0024] In one of the embodiments, the constant pressure pure water supply unit further comprises a second pressure sensor, and the second pressure sensor is arranged on a pipeline connecting the pressure stabilizing tank and the pure water tank;

[0025] The third pump body is a variable frequency water pump, and the third pump body can automatically adjust the water inlet volume of pure water according to the pressure signal detected by the second pressure sensor.

[0026] In one of the embodiments, the constant pressure pure water supply unit further comprises a liquid level sensor and a switch valve, wherein the liquid level sensor is arranged in the pure water tank and is used to detect the liquid level in the pure water tank;

[0027] The switch valve is arranged at the water inlet of the pure water tank and is used to automatically open when the liquid level sensor detects that the liquid level in the pure water tank is lower than the set value.

[0028] In one of the embodiments, the water supply system further comprises a fresh water multi-user integrated unit, and the fresh water multi-user integrated unit is arranged on the main deck of the platform;

[0029] The fresh water multi-user integrated unit includes platform process users and platform intermittent water users. The fresh water in the fresh water tank can be supplied to the platform process users and the platform intermittent water users respectively.

[0030] In one of the embodiments, the fresh water in the fresh water tank is pumped to the intermittent water users on the platform through the second pump body, and a stop valve is provided on the pipeline connecting the second pump body and the intermittent water users on the platform.

[0031] In one embodiment, a fifth pump body and a third flow sensor are provided on a pipeline connecting the fresh water tank and the platform process user, the third flow sensor is arranged at the outlet end of the fifth pump body, and the fifth pump body is used to automatically adjust the water intake of fresh water according to the flow signal detected by the third flow sensor;

[0032] A check valve is also provided on the pipeline connecting the fifth pump body and the platform process user.

[0033] Another object of the present invention is to provide an integrated skid device for water supply of an offshore hydrogen production multifunctional platform, comprising a container and a water supply system as described in any one of the above items;

[0034] Among them, the reverse osmosis water production unit, pure water production unit and constant pressure pure water supply unit are all installed in the container, which is a skid-mounted structure;

[0035] An interface module is arranged on the wall of the container, and a seawater inlet interface and a pure water output interface are arranged on the interface module.

[0036] In one embodiment, the interface module includes a combined sleeve and a plurality of connecting pipes respectively arranged corresponding to each interface, the combined sleeve is passed through the container wall, the plurality of connecting pipes are passed through the combined sleeve at intervals, and a sealing structure is arranged between the combined sleeve and each connecting pipe.

[0037] Another object of the present invention is to provide an integrated skid device for water supply of an offshore hydrogen production multifunctional platform, comprising a container and the water supply systems described in the above items;

[0038] Among them, the reverse osmosis water production unit, pure water production unit and constant pressure pure water supply unit, as well as the fresh water multi-user integrated unit are all installed in the container, which is a skid-mounted structure;

[0039] An interface module is arranged on the wall of the container, and the interface module is provided with a seawater inlet interface, a pure water output interface, a platform process user water outlet interface and a platform intermittent water user water outlet interface.

[0040] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects:

[0041] In the present invention, the water supply system includes a seawater lifting unit, a reverse osmosis water making unit, a pure water production unit and a constant pressure pure water supply unit. In addition to providing cooling seawater for the platform, the seawater lifting unit can also directly provide water for the reverse osmosis water making unit. This saves the traditional seawater pump and water tank dedicated to the water making machine, and also saves space for the pump and water tank on the platform.

[0042] The reverse osmosis water production unit can desalinate seawater to form fresh water, and the fresh water produced by the reverse osmosis water production unit can be directly supplied to the platform fresh water users. The fresh water produced by the reverse osmosis water production unit can also enter the pure water production unit, and the pure water production unit can deeply process the fresh water to produce ultrapure water. The pure water produced by the pure water production unit can be supplied to the platform hydrogen production module through a constant pressure pure water supply unit. In the constant pressure pure water supply unit, by setting a pressure regulating tank, pure water can be provided to the platform hydrogen production module in a timely and stable manner, ensuring the timeliness and stability of pure water for hydrogen production. Therefore, the water supply system of the present invention can timely and reliably supply pure water for hydrogen production to the platform hydrogen production module, and can also supply fresh water to the platform fresh water users. It is reliable in operation and can meet the use needs of fresh water and pure water of the offshore hydrogen production multifunctional platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the operating principle of a water supply system for an offshore hydrogen production multifunctional platform according to an embodiment of the present invention.

[0044] Figure 2 The diagram is a schematic diagram of the layout of the main equipment inside the water supply integrated skid device of the offshore hydrogen production multifunctional platform according to one embodiment of the present invention.

[0045] Figure 3 yes Figure 2 A schematic structural diagram of the interface module of the water supply integrated skid device is shown.

[0046] The following are the descriptions of the reference numerals:

[0047] 10-seawater lifting unit; 11-submersible pump; 12-hose winch; 13-guiding shell;

[0048] 15-seawater pretreatment unit; 16-primary filter; 17-secondary filter; 18-differential pressure sensor;

[0049] 20-reverse osmosis water production unit; 21-first pump body; 22-multi-stage reverse osmosis membrane assembly; 23-first reverse osmosis membrane group; 24-second reverse osmosis membrane group; 25-fresh water tank; 26-first flow sensor; 27-second flow sensor; 28-intermediate water tank; 29-fourth pump body; 30-first pressure sensor; 31-first conductivity meter sensor; 32-second conductivity meter sensor; 33-first backwash assembly; 34-second backwash assembly; 35-low pressure hose; 36-high pressure hose;

[0050] 40-pure water preparation unit; 41-second pump body; 42-EDI device; 43-pure water tank; 44-first detection sensor group; 45-second detection sensor group; 46-third detection sensor group;

[0051] 50-constant pressure pure water supply unit; 51-third pump body; 52-pressure stabilizing tank; 53-pure water tank; 54-second pressure sensor; 55-liquid level sensor; 56-switch valve;

[0052] 60-Fresh water multi-user integrated unit; 61-Platform process user; 62-Platform intermittent water user; 63-Stop valve; 64-Fifth pump body; 65-Third flow sensor; 66-Check valve;

[0053] 70- container; 71- interface module; 72- joint casing; 73- connecting pipe; 74- control cabinet; 75- air conditioner; 76- thermal insulation material; 77- plugging pipe; 78- plugging layer. DETAILED DESCRIPTION

[0054] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0055] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] See also Figure 1 As shown, the water supply system of the offshore hydrogen production multifunctional platform (hereinafter referred to as the water supply system) of an embodiment of the present invention includes a seawater lifting unit 10, a seawater pretreatment unit 15, a reverse osmosis water production unit 20, a pure water production unit 40, a constant pressure pure water supply unit 50 and a fresh water multi-user integrated unit 60.

[0058] like Figure 1 As shown, the seawater lifting unit 10 comprises a submersible pump 11 and a hose winch 12 , and the submersible pump 11 pumps seawater onto the platform deck through the hose winch 12 .

[0059] For example, a flow guide shell 13 for protection may be provided on the outside of the submersible pump 11. A check valve may be provided on the top of the submersible pump 11 to prevent the pump from being damaged by seawater backflow when the pump is stopped. The starting cabinet of the submersible pump 11 and the control box of the winch are integrated on the common base of the winch, which is convenient to control and highly integrated. At the same time, the submersible pump 11 adopts soft start, which reduces the impact of the starting current on the platform power grid, realizes smooth start, and can operate stably and reliably.

[0060] In the present application, the seawater lifting unit 10 can provide seawater to various seawater users of the platform. For example, seawater can be supplied to the plate heat exchanger in the platform cooling system and other seawater users. At the same time, seawater can also provide seawater raw water to the reverse osmosis water making unit 20 of the water supply system.

[0061] For example, Figure 1 As shown, the submersible pump 11 can be connected to three pipelines A1, A2 and A3 at the outlet of the main deck. Among them, pipeline A1 can lead to the plate cooler of the platform cooling system; pipeline A2 can lead to other seawater users of the platform; pipeline A3 leads to the reverse osmosis water making unit 20. Due to the design of using the submersible pump 11 and directly supplying seawater to each equipment user through various pipelines, the special seawater pump and water tank required for the traditional fresh water generator are saved, and the configuration and maintenance cost of the water supply system are reduced. Among them, the seawater pressure of pipeline A3 should not be less than the pressure required by the reverse osmosis water making unit 20, which is generally 3 bar.

[0062] It should be noted that, in the embodiment of the present application, the water supply system further includes a control unit, which is used to control the actions of each unit, thereby realizing automation and remote control of the water supply system. The control unit may be a PLC controller. The specific control process of the control unit can be found in the description of each unit below.

[0063] like Figure 1 As shown, the seawater pretreatment unit 15 is disposed between the seawater lifting unit 10 and the reverse osmosis water production unit 20, and is used to pretreat the seawater. For example, the seawater pretreatment unit 15 includes a primary filter 16 and a secondary filter 17, and the seawater output by the seawater lifting unit 10 passes through the primary filter 16 and the secondary filter 17 in sequence, and then reaches the reverse osmosis water production unit 20 for desalination.

[0064] Among them, the primary filter 16 can be a filter tank. The tank body of the filter tank can be made of fiberglass. High-quality quartz sand particles can be filled inside the filter tank, which can effectively intercept particulate matter in seawater. A multi-way valve can be provided on the top of the filter tank, and the filter tank can be backwashed regularly to remove suspended matter and impurities in the tank. For example, the multi-way valve is a time-type control method, and the operation, forward washing, backwashing time and number can be set through the relevant buttons on the valve body. The valve body is provided with an automatic remote control input port, which receives active signals and is used in conjunction with the PLC to achieve automatic control of the backwashing of the filter tank.

[0065] For example, a flow sensor may be provided at the inlet end of the filter tank, and the flow signal fed back by the flow sensor enables the control unit to control the amount of seawater entering the seawater pretreatment unit 15 from the seawater lifting unit 10. This is conducive to improving the automation level of the water supply system and ensuring the stable operation of the water supply system.

[0066] like Figure 1 As shown, the secondary filter 17 can be a security filter. The interior of the security filter can be equipped with a large-flux filter element with a pore size of 5μm, which can effectively intercept fine impurities and particles leaked from the filter tank. It can be understood that the filter element of the security filter needs to be cleaned or replaced after a period of use. For example, the judgment method for whether the filter element of the security filter needs to be cleaned or replaced can be: a pressure differential sensor 18 can be provided at the inlet and outlet of the security filter. The pressure differential sensor 18 can be connected to the control unit signal. When the pressure differential sensor 18 detects that the pressure difference between the inlet and outlet of the security filter is greater than 0.5kg / cm 2 When the filter element is damaged, the control unit will give an alarm so that the staff can clean or replace the filter element. At the same time, the safety filter is equipped with a large-flux filter element structure to meet the requirements of rapid filter element replacement.

[0067] In the embodiment of the present application, the seawater pretreatment unit 15 includes a filter tank and a security filter. However, the present application is not limited thereto. In other embodiments, the seawater pretreatment unit 15 may include a plurality of primary filters 16 and a plurality of secondary filters 17, as well as other sterilization treatment devices, etc., depending on the specific situation.

[0068] See also Figure 1 As shown, the reverse osmosis water generating unit 20 includes a first pump body 21 , a multi-stage reverse osmosis membrane assembly 22 and a fresh water tank 25 . Seawater is pumped to the multi-stage reverse osmosis membrane assembly 22 through the first pump body 21 for desalination, and the desalinated fresh water enters the fresh water tank 25 .

[0069] Specifically, the seawater output by the seawater lifting unit 10 can pass through the primary filter 16 and the secondary filter 17 in sequence, and enter the multi-stage reverse osmosis membrane assembly 22 for desalination under the drive of the first pump body 21, and the desalinated fresh water will enter the fresh water tank 25. Among them, the first pump body 21 can be a high-pressure water pump. For example, the first pump body 21 can be a high-pressure plunger pump. The high-pressure plunger pump has the advantages of high rated pressure, compact structure, high efficiency, and convenient flow regulation. It is suitable for use scenarios with high pressure, large flow and flow regulation. By using a high-pressure water pump, the seawater can be pressurized to ensure that the seawater smoothly enters the multi-stage reverse osmosis membrane assembly 22 for desalination. The first pump body 21 can be remotely controlled and started by the control unit. Of course, it can also be started manually as needed.

[0070] like Figure 1 As shown, in one embodiment, the inlet and outlet ends of the first pump body 21 are respectively connected to a low-pressure hose 35 and a high-pressure hose 36, and the first pump body 21 takes in water through the low-pressure hose 35 and discharges water through the high-pressure hose 36. By using a flexible hose connection at the water inlet and outlet of the first pump body 21, the vibration and noise of the first pump body 21 during operation can be effectively reduced.

[0071] See also Figure 1 In one embodiment, the multi-stage reverse osmosis membrane assembly 22 includes a primary reverse osmosis membrane group 23 and a secondary reverse osmosis membrane group 24. The primary reverse osmosis membrane group 23 is used to receive the seawater pumped into the first pump body 21 and desalinate the seawater, and the water produced by the primary reverse osmosis membrane group 23 enters the secondary reverse osmosis membrane group 24 for desalination again.

[0072] The first-stage reverse osmosis membrane group 23 may be composed of a plurality of pollution-resistant seawater reverse osmosis membrane elements. The first-stage reverse osmosis membrane group 23 is mainly used to remove ions, organic matter, microorganisms, viruses, etc. in seawater.

[0073] The secondary reverse osmosis membrane group 24 can be composed of multiple low-pressure reverse osmosis membrane elements. The secondary reverse osmosis membrane group 24 is mainly used to further remove ions in the water. The primary reverse osmosis membrane group 23 and the secondary reverse osmosis membrane group 24 can be remotely controlled and started by the control unit respectively. Of course, manual start can also be performed as needed.

[0074] In the embodiment of the present application, the multi-stage reverse osmosis membrane assembly 22 includes a primary reverse osmosis membrane group 23 and a secondary reverse osmosis membrane group 24. However, the present application is not limited thereto, and in other embodiments, the multi-stage reverse osmosis membrane assembly 22 may also include a three-stage reverse osmosis membrane group or even more stages to achieve deep desalination, depending on the specific situation.

[0075] See also Figure 1In one embodiment, the reverse osmosis water generating unit 20 includes a first backwash assembly 33 and a second backwash assembly 34 , and the first backwash assembly 33 and the second backwash assembly 34 are respectively arranged corresponding to the primary reverse osmosis membrane group 23 and the secondary reverse osmosis membrane group 24 .

[0076] For example, the first backwash component 33 may include an air pump and an aeration pipe, and the aeration pipe may be disposed inside the container of the first-stage reverse osmosis membrane group 23. The first-stage reverse osmosis membrane group 23 may be backwashed by supplying compressed air to the aeration pipe through the air pump. Alternatively, the first backwash component 33 may also utilize a cleaning water pump to pump a cleaning agent into the container of the first-stage reverse osmosis membrane group 23 to backwash the first-stage reverse osmosis membrane group 23.

[0077] The second backwashing assembly 34 may also include an air pump and an aeration pipe, and the aeration pipe may be disposed inside the container of the secondary reverse osmosis membrane group 24. The air pump supplies compressed air to the aeration pipe to achieve backwashing of the secondary reverse osmosis membrane group 24. Alternatively, the second backwashing assembly 34 may also utilize a cleaning water pump to pump a cleaning agent into the container of the secondary reverse osmosis membrane group 24 to achieve backwashing of the secondary reverse osmosis membrane group 24.

[0078] In this embodiment, by providing the first backwash assembly 33 and the second backwash assembly 34, the primary reverse osmosis membrane group 23 and the secondary reverse osmosis membrane group 24 can be cleaned regularly to restore the water production capacity of each reverse osmosis membrane group. The first backwash assembly 33 and the second backwash assembly 34 can be remotely controlled and started by the control unit respectively. Of course, they can also be manually started as needed.

[0079] See also Figure 1 In one embodiment, the reverse osmosis water production unit 20 further includes an intermediate water tank 28, which is connected between the primary reverse osmosis membrane group 23 and the secondary reverse osmosis membrane group 24. The intermediate water tank 28 is used to temporarily store the water produced by the primary reverse osmosis membrane group 23. In this embodiment, the intermediate water tank 28 can play a role in pressure reduction and buffering. Since the water produced by the primary reverse osmosis membrane group 23 carries a certain pressure, the water produced by the primary reverse osmosis membrane group 23 enters the intermediate water tank 28 for temporary storage, which can reduce the pressure on the water production side of the seawater reverse osmosis membrane, avoid irreversible damage to the reverse osmosis membrane due to back pressure, and buffer pressure fluctuations.

[0080] like Figure 1 As shown, in one embodiment, a fourth pump body 29 is further provided between the intermediate water tank 28 and the secondary reverse osmosis membrane group 24. The fourth pump body 29 may be a centrifugal pump. The centrifugal pump may be remotely controlled and started by the control unit. Of course, it may also be manually started as required. By providing the fourth pump body 29, the ability of the intermediate water tank 28 to transfer seawater to the secondary reverse osmosis membrane group 24 can be ensured, ensuring that the seawater smoothly enters the secondary reverse osmosis membrane group 24 for further desalination.

[0081] See also Figure 1 As shown, the reverse osmosis water production unit 20 further includes a first flow sensor 26 and a second flow sensor 27. The first flow sensor 26 is disposed at the water outlet of the primary reverse osmosis membrane group 23, and can be used to detect the water production of the primary reverse osmosis membrane group 23. The second flow sensor 27 is disposed at the water outlet of the secondary reverse osmosis membrane group 24, and can be used to detect the water production of the secondary reverse osmosis membrane group 24. It can be understood that the first flow sensor 26 and the second flow sensor 27 can send flow signals to the control unit respectively.

[0082] The first pump body 21 is a variable frequency high pressure pump. The variable frequency high pressure pump can be remotely controlled to start and run by the control unit. For example, when the first pump body 21 is started, the frequency should be increased slowly, and the frequency increase time should be extended according to the control requirements to avoid the adverse impact of the rear-end RO membrane caused by too fast pressure increase. After reaching the set frequency, RO water production is carried out. During the water production process, the water quality is numerically monitored and recorded by the first conductivity meter sensor 31 and the second conductivity meter sensor 32, as described below.

[0083] In this embodiment, the first pump body 21 can automatically adjust the water intake of seawater according to the flow signal detected by the first flow sensor 26 and / or the second flow sensor 27. Since seawater is used as raw water for pure water for hydrogen production, its temperature will change with time and season. Changes in seawater temperature will affect the water permeability of the reverse osmosis membrane, and thus the final water production will also change accordingly. In this embodiment, by setting the first flow sensor 26 and the second flow sensor 27 to respectively detect the water production of the first reverse osmosis membrane group 23 and the second reverse osmosis membrane group 24, the water production conditions of the first reverse osmosis membrane group 23 and the second reverse osmosis membrane group 24 can be known in real time.

[0084] When the water production of the primary reverse osmosis membrane group 23 and / or the secondary reverse osmosis membrane group 24 decreases due to factors such as changes in seawater and ambient temperature, that is, the flow rate detected by either the first flow sensor 26 or the second flow sensor 27 will decrease. When the flow rate detected by either the first flow sensor 26 or the second flow sensor 27 is less than the set low value, the variable frequency high-pressure pump can automatically increase the speed of the motor according to the flow signal fed back by either the first flow sensor 26 or the second flow sensor 27 to increase the water intake of seawater, thereby ensuring the water production of the primary reverse osmosis membrane group 23 and the secondary reverse osmosis membrane group 24. Conversely, when the flow rate detected by either the first flow sensor 26 or the second flow sensor 27 is greater than the set high value, the variable frequency high-pressure pump can automatically reduce the speed to reduce the water intake of seawater, thereby making the water production of the reverse osmosis water production unit 20 constant.

[0085] In this embodiment, the flow signal fed back by the first flow sensor 26 and the second flow sensor 27 can automatically adjust the speed of the variable frequency high-pressure pump to achieve a constant water production rate of the reverse osmosis water production unit 20, thereby improving the automation level and operation stability of the water supply system.

[0086] See also Figure 1 In one embodiment, first pressure sensors 30 are respectively provided at the water inlet and outlet of the primary reverse osmosis membrane group 23, and at the water inlet and outlet of the secondary reverse osmosis membrane group 24. Each first pressure sensor 30 can be connected to the control unit by signal. The pressure during the water production process of the primary reverse osmosis membrane group 23 and the secondary reverse osmosis membrane group 24 can be detected by each first pressure sensor 30, so that the water production conditions of the primary reverse osmosis membrane group 23 and the secondary reverse osmosis membrane group 24 can be known, and then the reverse osmosis water production unit 20 can automatically adjust the process flow according to the detected pressure signal to ensure the stability of water production.

[0087] For example, when the water inlet pressure of the first reverse osmosis membrane group 23 is too high, the first pump body 21 can reduce the rotation speed to reduce the amount of seawater inflow, thereby avoiding excessive impact on the membrane elements of the first reverse osmosis membrane group 23. Alternatively, when the water inlet pressure of the second reverse osmosis membrane group 24 is too high, the water output of the fourth pump body 29 can be reduced to avoid excessive impact on the membrane elements of the second reverse osmosis membrane group 24.

[0088] See also Figure 1 In one embodiment, the reverse osmosis water production unit 20 includes a first conductivity meter sensor 31 and a second conductivity meter sensor 32. The first conductivity meter sensor 31 is arranged at the water outlet of the first reverse osmosis membrane group 23, and the second conductivity meter sensor 32 is arranged at the water outlet of the second reverse osmosis membrane group 24. The first conductivity meter sensor 31 and the second conductivity meter sensor 32 can be respectively connected to the control unit signal. By setting the first conductivity meter sensor 31 and the second conductivity meter sensor 32, the water quality of the produced water of the first reverse osmosis membrane group 23 and the second reverse osmosis membrane group 24 can be monitored respectively to ensure the quality of the produced water.

[0089] For example, when the first conductivity meter sensor 31 or the second conductivity meter sensor 32 detects that the water quality does not meet the standard, it can reflect that the desalination capacity of the primary reverse osmosis membrane group 23 or the secondary reverse osmosis membrane group 24 has decreased. At this time, it is necessary to clean the primary reverse osmosis membrane group 23 or the secondary reverse osmosis membrane group 24 to ensure the quality of the produced water. At the same time, the water supply system can allow the produced water that does not meet the standard to re-enter the primary reverse osmosis membrane group 23 or the secondary reverse osmosis membrane group 24 for desalination.

[0090] like Figure 1As shown, the pure water preparation unit 40 includes a second pump body 41, an EDI device 42 and a pure water tank 43. The fresh water in the fresh water tank 25 is pumped into the EDI device 42 through the second pump body 41, and the pure water treated by the EDI device 42 enters the pure water tank 43. Among them, the second pump body 41 can be a centrifugal pump or a plunger pump, etc. The second pump body 41 is mainly used to suck the fresh water in the fresh water tank 25 and output it to the EDI device 42. The second pump body 41 can be remotely controlled to start and run by the control unit. Of course, it can also be manually started as needed.

[0091] Among them, the EDI device 42 is a device that uses the electro deionization water purification technology EDI (electro deionization) to produce ultrapure water for hydrogen production. The EDI device 42 is a device specifically used for preparing ultrapure water. It can remove impurities and salts in water in a long-term and efficient manner, and provide stable high-quality ultrapure water. At the same time, since it does not require chemical regeneration, the operating cost is greatly reduced, and the pollution to the environment is also reduced. The EDI device 42 can be remotely controlled to start and operate by the control unit. Of course, it can also be manually started as needed.

[0092] For example, the EDI device 42 may include a fresh water inlet, a concentrated water inlet, a pure water outlet, and a concentrated water outlet. The produced water of the reverse osmosis water generating unit 20 may enter the fresh water chamber and the concentrated water chamber of the EDI device 42 through the fresh water inlet and the concentrated water inlet, respectively. Under the action of the electric field, the charged ions in the water are moved, thereby achieving deep purification and desalination of the water. The purified water enters the pure water tank 43 through the pure water outlet. The remaining concentrated water can be drawn out through the concentrated water outlet.

[0093] Optionally, the concentrated water produced by the EDI device 42 can be led to the reverse osmosis water production unit 20 for desalination, so as to realize the recycling of the residual water. For example, the concentrated water produced by the EDI device 42 can be led to the intermediate water tank 28, and then re-participate in the desalination and pure water production process.

[0094] See also Figure 1 In one embodiment, a first detection sensor group 44 is provided at the outlet end of the second pump body 41, and the first detection sensor group 44 is used to detect the pressure, conductivity and flow rate of the water discharged from the second pump body 41. The first detection sensor group 44 may include a pressure sensor, a conductivity meter sensor and a flow sensor.

[0095] A second detection sensor group 45 is provided at the pure water outlet, and the second detection sensor group 45 is used to detect the pressure, conductivity and flow rate of the pure water output from the pure water outlet. The second detection sensor group 45 may include a pressure sensor, a conductivity meter sensor and a flow sensor.

[0096] A third detection sensor group 46 is provided at the concentrated water outlet, and the third detection sensor group 46 is used to detect the pressure and flow rate of the concentrated water output from the concentrated water outlet. The third detection sensor group 46 may include a pressure sensor and a flow rate sensor.

[0097] Among them, each sensor in the first detection sensor group 44, the second detection sensor group 45 and the third detection sensor group 46 can be connected to the control unit signal respectively. Through the first detection sensor group 44, the second detection sensor group 45 and the third detection sensor group 46, the pressure, conductivity and flow rate in the water production process of the pure water production unit 40 can be logically controlled and numerically detected, and the process flow can be automatically adjusted according to the monitoring data to ensure the stability of water production of the pure water production unit 40.

[0098] Furthermore, during the water production process of the pure water production unit 40, by monitoring the flow at the outlet end of the second pump body 41, the pure water outlet and the concentrated water outlet, the water flow of the EDI device 42 can be ensured to be stable and avoid water shortage.

[0099] like Figure 1 As shown, the constant pressure pure water supply unit 50 includes a third pump body 51, a pressure stabilizing tank 52 and a pure water tank 53. The pure water in the pure water tank 43 is pumped into the pressure stabilizing tank 52 through the third pump body 51, and is stabilized by the pressure stabilizing tank 52 and enters the pure water tank 53, which is used to supply pure water to the platform hydrogen production module.

[0100] The third pump body 51 may be a variable frequency water pump, which can automatically adjust the pure water inlet according to the pipeline pressure of the pure water supply unit 50. The third pump body 51 can be remotely controlled to start and operate by the control unit. Of course, it can also be manually started as needed.

[0101] In one embodiment, Figure 1 As shown, the constant pressure pure water supply unit 50 further includes a second pressure sensor 54, which is disposed on a pipeline connecting the pressure stabilizing tank 52 and the pure water tank 53. The second pressure sensor 54 can be connected to the control unit by signal.

[0102] Specifically, the third pump body 51 can automatically adjust the inflow of pure water according to the pressure signal detected by the second pressure sensor 54. In this embodiment, the third pump body 51 is variable frequency operation, and its control method can adopt proportional-integral-derivative control PID control (proportional-integral-derivative control). Specifically, the logic of PID control is to control the variable frequency water pump by linearly combining the deviation formed by the set pressure value interval and the actual pressure value detected by the second pressure sensor 54 in proportion, integration and differentiation to form a control amount, thereby realizing automatic adjustment of the inflow of pure water.

[0103] In this embodiment, the pressure stabilizing tank 52 has the ability to adjust the pipeline pressure, thereby ensuring that the pressure of the constant pressure pure water supply unit 50 is constant. The pressure stabilizing tank 52 also has a certain water storage capacity to ensure the stability of the pure water supply. The pressure stabilizing tank 52 can be remotely controlled to start and operate by the control unit. Of course, it can also be manually started as needed.

[0104] like Figure 1 As shown, in one embodiment, the constant pressure pure water supply unit 50 further includes a liquid level sensor 55 and a switch valve 56. The liquid level sensor 55 is arranged in the pure water tank 53 and is used to detect the liquid level in the pure water tank 53. The switch valve 56 is arranged at the water inlet of the pure water tank 53 and is used to automatically open when the liquid level sensor 55 detects that the liquid level in the pure water tank 53 is lower than the set value. Among them, the liquid level sensor 55 can be connected to the control unit signal. The control unit can remotely control the opening and closing of the switch valve 56. Of course, the switch valve 56 can also be manually opened as needed.

[0105] In this embodiment, by providing a liquid level sensor 55 and a switch valve 56, the storage amount of pure water in the pure water tank 53 can be guaranteed so as to be supplied to the platform hydrogen production module.

[0106] For example, during the operation of the constant pressure pure water supply unit 50 of the embodiment of the present application, when the liquid level sensor 55 detects that the liquid level of the pure water tank 53 is lower than the set value, the switch valve 56 is automatically opened; at the same time, the pressure value detected by the second pressure sensor 54 begins to decrease, and when the pressure value is lower than the set low value, the third pump body 51 starts to operate to supplement the pressure of the constant pressure pure water supply unit 50. When the pressure value reaches the set high value, the third pump body 51 stops operating.

[0107] The constant pressure pure water supply unit 50 of the embodiment of the present application can provide a pure water source for hydrogen production to various types of electrolyzer systems such as alkaline electrolyzers and PEM electrolyzers.

[0108] like Figure 1 As shown, the fresh water multi-user integrated unit 60 includes a platform process user 61 and a platform intermittent water user 62 , and the fresh water in the fresh water tank 25 can be supplied to the platform process user 61 and the platform intermittent water user 62 , respectively.

[0109] For example, the outlet water of the fresh water tank 25 may be connected to two pipelines B1 and B2. The pipeline B1 leads to the pure water production unit 40. The pipeline B2 leads to the platform process user 61.

[0110] Meanwhile, the pipeline B1 leading to the pure water production unit 40 can be divided into two pipelines C1 and C2. The pipeline C1 leads to the EDI device 42, and the pipeline C2 leads to the platform intermittent water user 62.

[0111] That is, in the embodiment of the present application, the fresh water in the fresh water tank 25 can be supplied to the EDI device 42, the platform process user 61 and the platform intermittent water user 62 as needed. It can be understood that the fresh water tank 25 needs to be designed with sufficient volume, and the simultaneous use coefficient of the EDI device 42, the platform process user 61 and the platform intermittent water user 62 needs to be considered, and a certain redundancy coefficient is included.

[0112] In an embodiment of the present application, the platform process user 61 may refer to a platform ammonia production module. The platform ammonia production module can synthesize ammonia using the hydrogen produced by the platform hydrogen production module and the nitrogen stored on the platform. Since the vented gas in the synthetic ammonia process needs to enter the ammonia absorption tower for further absorption and washing, and the ammonia absorption tower needs to use desalted water to absorb and wash the gas, the washed gas is then led to a high place for venting. Therefore, the platform ammonia production module needs to use desalted water. Usually, the water used by the platform ammonia production module is a small flow rate of continuous water.

[0113] like Figure 1 As shown, in one embodiment, a fifth pump body 64 and a third flow sensor 65 are provided on the pipeline connecting the fresh water tank 25 and the platform process user 61. That is, the fifth pump body 64 and the third flow sensor 65 are provided on the pipeline B2. Among them, the fifth pump body 64 can be a metering pump. The metering pump can be an electromagnetic metering pump. The fifth pump body 64 can be remotely controlled to start and run by the control unit. Of course, it can also be manually started as needed.

[0114] The third flow sensor 65 is disposed at the outlet end of the fifth pump body 64. The third flow sensor 65 can be connected to the control unit signal. In this embodiment, the fifth pump body 64 is used to automatically adjust the inflow of fresh water according to the flow signal detected by the third flow sensor 65. Thus, the continuity and stability of the amount of water supplied to the platform process user 61 can be ensured through the third flow sensor 65 and the fifth pump body 64.

[0115] like Figure 1 As shown, a check valve 66 is also provided on the pipeline connecting the fifth pump body 64 and the platform process user 61. By providing the check valve 66, the water supplied to the platform process user 61 can be prevented from flowing back, thereby ensuring the normal operation and safety of the water supply system.

[0116] In the embodiment of the present application, the platform intermittent water user 62 may refer to the platform alcohol production module. The platform alcohol production module can synthesize methanol using the hydrogen produced by the platform hydrogen production module and the carbon dioxide stored on the platform. The synthetic methanol process includes a soft water tank, which replenishes water to the steam drum used for water vapor separation to ensure a suitable water level in the steam drum. The process water replenishment is intermittent water use.

[0117] In addition, the process flow of synthetic ammonia mentioned above includes a water washing tank, which also belongs to intermittent water use. The water of these intermittent users can be supplied by the fresh water tank 25 through the pipeline C2.

[0118] like Figure 1 As shown, in one embodiment, the fresh water in the fresh water tank 25 can be pumped to the platform intermittent water user 62 through the second pump body 41. That is, the pipelines C1 and C2 can be respectively connected to the outlet of the second pump body 41. The water outlet of the second pump body 41 can be respectively led to the EDI device 42 and the platform intermittent water user 62.

[0119] In this embodiment, the platform intermittent water user 62 and the EDI device 42 share a pump body, which can reduce the number of pump bodies in the water supply system, save the configuration and operation costs of the water supply system, and help improve the integration of the water supply system.

[0120] like Figure 1 As shown, a stop valve 63 is provided on the pipeline connecting the second pump body 41 and the platform intermittent water user 62. The stop valve 63 can also be remotely controlled to be opened and closed by the control unit. Alternatively, the stop valve 63 can also be a manual stop valve. By providing the stop valve 63, fresh water can be supplied to the platform intermittent water user 62 on demand to meet the intermittent water demand, which is conducive to ensuring the normal operation and safety of the water supply system.

[0121] See also Figure 2 An embodiment of the present invention further provides a water supply integrated skid device for an offshore hydrogen production multifunctional platform (hereinafter referred to as a water supply integrated skid device), which includes a container 70 and the water supply system described in any of the above embodiments.

[0122] The container 70 is a skid-mounted structure, so that the container 70 can be arranged and installed on the main deck of the platform, and can be lifted and transported as needed.

[0123] Each unit of the water supply system, the seawater pretreatment unit 15, the reverse osmosis water production unit 20, the pure water production unit 40, the constant pressure pure water supply unit 50 and the fresh water multi-user integrated unit 60 can be installed in the container 70. By integrating the units of the water supply system in the container 70, the water supply system can be formed into a compact and modular design, which is convenient for the overall layout of the water supply system on the platform.

[0124] It should be noted that a control cabinet 74 of a water supply system may be installed in the container 70. An air conditioner 75 may also be installed in the container 70 to ensure that the ambient temperature in the container is suitable. Other auxiliary equipment may also be installed in the container 70.

[0125] like Figure 3As shown, a heat-insulating material 76 may be provided inside the bulkhead of the container 70. The heat-insulating material 76 may play a role in heat insulation and reduce the impact of fluctuations in the ambient temperature in the container 70 on the water supply system.

[0126] like Figure 2 and Figure 3 As shown, an interface module 71 is provided on the wall of the container 70. The interface module 71 is provided with all the pipeline interfaces of the entire water supply integrated skid device. Specifically, the interface module 71 is provided with a seawater inlet interface N1, a pure water output interface N2, a platform process user 61 water outlet interface N3 and a platform intermittent water user 62 water outlet interface N4. Among them, the seawater pipe can be made of carbon steel galvanized seamless steel pipe. Fresh water and ultrapure water pipes can be made of stainless steel pipes. By integrating the various pipeline interfaces on the interface module 71, the integration of the water supply integrated skid device can be improved, which is convenient for the subsequent construction design and daily maintenance of the platform.

[0127] See also Figure 3 In one embodiment, the interface module 71 includes a joint sleeve 72 and a plurality of connecting pipes 73 respectively arranged corresponding to each interface. The joint sleeve 72 is penetrated on the wall of the container 70, and the plurality of connecting pipes 73 are mutually spaced and penetrated in the joint sleeve 72. Since the bulkhead of the container 70 is generally a corrugated folded plate type, in this embodiment, by adopting the design of the joint sleeve 72 penetrating the cabin, the different lengths of the bulkhead openings can be compensated, which facilitates the bulkhead opening and construction. At the same time, it also solves the problem of electrical corrosion caused by welding of different materials between the bulkhead and the pipe (such as the N2 / N3 / N4 interface pipe is a stainless steel seamless steel pipe).

[0128] See also Figure 3 As shown, a plugging structure is provided between the joint sleeve 72 and each connecting pipe 73. By providing the plugging structure, the air tightness of the bulkhead can be ensured to prevent the penetration or entry of dangerous gases in the dangerous area. In one embodiment, the plugging structure may include a plugging material filled inside the joint sleeve 72 and between each connecting pipe 73. Among them, the plugging material may be a plugging pipe 77.

[0129] like Figure 3 As shown, the blocking structure may further include a blocking layer 78 disposed between the end of the joint sleeve 72 located outside the bulkhead and each connecting pipe 73. The blocking layer 78 may be made of airtight blocking glue.

[0130] Specifically, when the plugging pipe 77 is filled into the joint sleeve 72, airtight plugging glue can be filled into the plugging pipe 77 and the gaps between each plugging pipe 77 and the joint sleeve 72 and each connecting pipe 73. Therefore, the plugging pipe 77 not only plays a sealing role, but also plays a role in fixing and supporting each connecting pipe 73. When enough plugging glue is filled, the plugging glue can form a plugging layer 78 at the end of the joint sleeve 72 outside the bulkhead. Therefore, the design of the interface module 71 of the present application is not only convenient for the integrated installation of various pipeline interfaces, but also ensures the airtightness of the container 70 to prevent the penetration or entry of dangerous gases in dangerous areas.

[0131] The water supply integrated skid device of the present application can be installed in a safe area of ​​the platform and as far away as possible from the dangerous area on the platform divided by dangerous gases and the like.

[0132] The water supply integrated skid device of the embodiment of the present application integrates each unit into a container, and integrates each pipeline interface on an interface module, which effectively improves the integration of the device, reduces the occupied space and pipeline connection points, and reduces the risk of leakage. The water supply integrated skid device can improve the compactness and reliability of the water supply system, reduce the difficulty and cost of on-site construction, and is also convenient for transportation and maintenance.

[0133] The water supply system of the embodiment of the present application adopts a shared seawater design. In addition to providing cooling seawater for the platform, the seawater lifting unit can also directly provide water for the reverse osmosis water making unit, thereby saving the traditional seawater pump and water tank dedicated to the water making machine, and also saving the space for the pump and water tank on the platform.

[0134] In the water supply system of the embodiment of the present application, the seawater lifting unit is mainly composed of a submersible pump and a hose winch. The starting cabinet of the submersible pump and the winch control box can be integrated on the common base of the winch, with high integration, reducing the cost of later construction. At the same time, the submersible pump adopts soft start to avoid overcurrent tripping at start-up, thereby achieving stable and reliable operation of the pump.

[0135] The water supply system of the embodiment of the present application can automatically adjust the rotation speed of the first pump body through the flow signal fed back by the first flow sensor and the second flow sensor, thereby ensuring a constant water production flow of the reverse osmosis water production unit, and improving the automation and operation stability of the water supply system. In addition, the first pump body is a variable frequency plunger pump, and the front and rear of the pump are connected in a flexible hose manner, which reduces the vibration and noise of the pump body during operation.

[0136] The water supply system of the embodiment of the present application provides desalted water for process directly from the position of the fresh water tank to the platform process users according to the actual needs of the users of the hydrogen production multifunctional platform, reducing the number of users who need to take water out of the pure water tank for final hydrogen production, thereby helping to save costs. In addition, the platform intermittent water users, such as the expansion water tank in the cooling system, the water used in the water washing tank of the process module, etc., are directly taken out from the second pump body of the pure water production unit, and share a pump body with the EDI device, so that the water supply system is highly integrated and helps to save costs.

[0137] In the water supply system of the embodiment of the present application, the constant pressure pure water supply unit includes a third pump body of variable frequency design, and a pressure stabilizing tank is arranged behind the third pump body, which ensures the automation, timeliness and stability of pure water for hydrogen production. At the same time, by arranging a switch valve in front of the pure water tank and feedback of the signal of the liquid level sensor of the pure water tank, the switch valve can be automatically opened and closed, thereby improving the automation degree of the water supply system.

[0138] The water supply system of the embodiment of the present application has high integration and automation. The operation of each unit can be centrally monitored and controlled by the control unit, thereby realizing the automatic operation of each unit. In addition, manual / automatic and local / remote free switching can be realized.

[0139] The water supply system of the embodiment of the present application solves the problem of unstable water production caused by changes in seawater temperature by optimizing the process flow of the reverse osmosis water production unit. The constant pressure pure water supply unit can provide stable pure water for hydrogen production for the electrolyzer equipment. At the same time, the water supply system integrates multiple fresh water users of the platform, improving the compactness and reliability of the system.

[0140] The above embodiments are merely exemplary descriptions of the structures. The structures in the embodiments are not fixed combination structures. In the absence of structural conflicts, the structures in multiple embodiments can be used in any combination.

[0141] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A water supply system for an offshore hydrogen production multifunctional platform, characterized in that: include: A seawater lifting unit, comprising a submersible pump and a hose winch, wherein the submersible pump pumps seawater onto the main deck of the platform through the hose winch; A reverse osmosis water generating unit is arranged on the main deck of the platform, and comprises a first pump body, a multi-stage reverse osmosis membrane assembly and a fresh water tank. Seawater is pumped to the multi-stage reverse osmosis membrane assembly through the first pump body for desalination, and the desalinated fresh water enters the fresh water tank; A pure water production unit is arranged on the main deck of the platform, and comprises a second pump body, an EDI device and a pure water tank. The fresh water in the fresh water tank is pumped into the EDI device through the second pump body, and the pure water treated by the EDI device enters the pure water tank; A constant pressure pure water supply unit is arranged on the main deck of the platform. The constant pressure pure water supply unit includes a third pump body, a pressure stabilizing tank and a pure water tank. The pure water in the pure water tank is pumped into the pressure stabilizing tank through the third pump body, and is pressure-stabilized by the pressure stabilizing tank and enters the pure water tank. The pure water tank is used to supply pure water to the platform hydrogen production module.

2. The water supply system for offshore hydrogen production multifunctional platform according to claim 1, characterized in that: The multi-stage reverse osmosis membrane assembly comprises a primary reverse osmosis membrane group and a secondary reverse osmosis membrane group, wherein the primary reverse osmosis membrane group is used to receive the seawater pumped into the first pump body and perform desalination, and the water produced by the primary reverse osmosis membrane group enters the secondary reverse osmosis membrane group for re-desalination; The reverse osmosis water production unit further includes a first flow sensor and a second flow sensor, wherein the first flow sensor is arranged at the water outlet end of the first-level reverse osmosis membrane group, and the second flow sensor is arranged at the water outlet end of the second-level reverse osmosis membrane group; The first pump body is a variable frequency high-pressure pump, and the first pump body can automatically adjust the water intake of seawater according to the flow signal detected by the first flow sensor and / or the second flow sensor.

3. The water supply system for the offshore hydrogen production multifunctional platform according to claim 2 is characterized in that: The reverse osmosis water production unit further includes an intermediate water tank, which is connected between the primary reverse osmosis membrane group and the secondary reverse osmosis membrane group, and is used to temporarily store water produced by the primary reverse osmosis membrane group.

4. The water supply system for the offshore hydrogen production multifunctional platform according to claim 3 is characterized in that: The reverse osmosis water production unit further includes a fourth pump body, which is arranged between the intermediate water tank and the secondary reverse osmosis membrane group.

5. The water supply system for offshore hydrogen production multifunctional platform according to claim 2, characterized in that: The reverse osmosis water production unit includes a plurality of first pressure sensors, which are respectively arranged at the water inlet and outlet of the first reverse osmosis membrane group and at the water inlet and outlet of the second reverse osmosis membrane group.

6. The water supply system for the offshore hydrogen production multifunctional platform according to claim 2, characterized in that: The reverse osmosis water production unit includes a first conductivity meter sensor and a second conductivity meter sensor. The first conductivity meter sensor is arranged at the water outlet end of the first-level reverse osmosis membrane group, and the second conductivity meter sensor is arranged at the water outlet end of the second-level reverse osmosis membrane group.

7. The water supply system for the offshore hydrogen production multifunctional platform according to claim 2, characterized in that: The reverse osmosis water production unit includes a first backwash component and a second backwash component, the first backwash component and the second backwash component are respectively arranged corresponding to the first-level reverse osmosis membrane group and the second reverse osmosis membrane group, the first backwash component is used to backwash the first-level reverse osmosis membrane group, and the second backwash component is used to backwash the second-level reverse osmosis membrane group.

8. The water supply system for the offshore hydrogen production multifunctional platform according to claim 1, characterized in that: The inlet end and the outlet end of the first pump body are respectively connected to a low-pressure hose and a high-pressure hose. The first pump body takes in water through the low-pressure hose and discharges water through the high-pressure hose.

9. The water supply system for offshore hydrogen production multifunctional platform according to claim 1, characterized in that: It also includes a seawater pretreatment unit, which is arranged between the seawater lifting unit and the reverse osmosis water production unit. The seawater pretreatment unit includes a primary filter and a secondary filter. The seawater output by the seawater lifting unit passes through the primary filter and the secondary filter in sequence, and is pumped to the multi-stage reverse osmosis membrane assembly through the first pump body.

10. The water supply system for the offshore hydrogen production multifunctional platform according to claim 1, characterized in that: A first detection sensor group is provided at the outlet end of the second pump body, and the first detection sensor group is used to detect the pressure, conductivity and flow rate of the water discharged from the second pump body; The EDI device has a pure water outlet and a concentrated water outlet, the pure water outlet is connected to the pure water tank, and the concentrated water outlet is connected to the reverse osmosis water production unit; A second detection sensor group is provided at the pure water outlet, and the second detection sensor group is used to detect the pressure, conductivity and flow rate of the pure water output from the pure water outlet; A third detection sensor group is provided at the concentrated water outlet, and the third detection sensor group is used to detect the pressure and flow rate of the concentrated water outputted from the concentrated water outlet.

11. The water supply system for offshore hydrogen production multifunctional platform according to claim 1, characterized in that: The constant pressure pure water supply unit further comprises a second pressure sensor, which is arranged on a pipeline connecting the pressure stabilizing tank and the pure water tank; The third pump body is a variable frequency water pump, and the third pump body can automatically adjust the amount of pure water inlet according to the pressure signal detected by the second pressure sensor.

12. The water supply system for offshore hydrogen production multifunctional platform according to claim 1, characterized in that: The constant pressure pure water supply unit further comprises a liquid level sensor and a switch valve, wherein the liquid level sensor is arranged in the pure water tank and is used to detect the liquid level in the pure water tank; The switch valve is arranged at the water inlet of the pure water tank, and is used to automatically open when the liquid level sensor detects that the liquid level in the pure water tank is lower than a set value.

13. The water supply system for an offshore hydrogen production multifunctional platform according to any one of claims 1 to 12, characterized in that: It also includes a freshwater multi-user integrated unit, which is arranged on the main deck of the platform; The fresh water multi-user integrated unit includes platform process users and platform intermittent water users, and the fresh water in the fresh water tank can be supplied to the platform process users and the platform intermittent water users respectively.

14. The water supply system for offshore hydrogen production multifunctional platform according to claim 13, characterized in that: The fresh water in the fresh water tank is pumped to the intermittent water users on the platform through the second pump body, and a stop valve is provided on the pipeline connecting the second pump body and the intermittent water users on the platform.

15. The water supply system for offshore hydrogen production multifunctional platform according to claim 13, characterized in that: A fifth pump body and a third flow sensor are provided on the pipeline connecting the fresh water tank and the platform process user. The third flow sensor is arranged at the outlet end of the fifth pump body. The fifth pump body is used to automatically adjust the fresh water intake according to the flow signal detected by the third flow sensor. A check valve is also provided on the pipeline connecting the fifth pump body and the platform process user.

16. An integrated skid device for water supply of an offshore hydrogen production multifunctional platform, characterized in that: Comprising a container, and the water supply system according to any one of claims 1 to 15; The reverse osmosis water production unit, the pure water production unit and the constant pressure pure water supply unit are all installed in the container, and the container is a skid-mounted structure; An interface module is arranged on the wall of the container, and a seawater inlet interface and a pure water output interface are arranged on the interface module.

17. The integrated skid device for water supply of offshore hydrogen production multifunctional platform according to claim 16, characterized in that: The interface module includes a combined sleeve and a plurality of connecting pipes respectively arranged corresponding to each interface. The combined sleeve is penetrated on the wall of the container. The plurality of connecting pipes are penetrated in the combined sleeve at intervals from each other, and a sealing structure is arranged between the combined sleeve and each connecting pipe.

18. An integrated skid device for water supply of an offshore hydrogen production multifunctional platform, characterized in that: Comprising a container, and the water supply system according to any one of claims 13 to 15; The reverse osmosis water production unit, the pure water production unit, the constant pressure pure water supply unit, and the fresh water multi-user integrated unit are all installed in the container, and the container is a skid-mounted structure; An interface module is provided on the wall of the container, and the interface module is provided with a seawater inlet interface, a pure water output interface, a platform process user water outlet interface and a platform intermittent water user water outlet interface.

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