Wind-solar complementary electro-catalysis ammonia production and refrigeration system applied to ship

Abstract

The utility model discloses a wind-solar complementary electro-catalysis ammonia production and refrigeration system applied to a ship, relates to the technical field of electro-catalysis ammonia synthesis, and provides safer and green energy for applying an electro-catalysis ammonia production device on the ship while reducing the cost of wastewater treatment and ammonia gas storage. The wind-solar complementary power generation technology and the electro-catalysis ammonia production technology are organically combined, compared with a traditional high-temperature and high-pressure ammonia synthesis process, emission of greenhouse gas is effectively reduced, the ammonia production process is more environmentally friendly, and the ammonia industry is promoted to stride towards the sustainable development direction; in addition, when ship washing wastewater is treated and environmental pollution is reduced, the product is used as a refrigerant of the refrigeration module, a good cooling effect can be provided, and compared with a traditional refrigeration mode, the refrigeration module with the green ammonia as the refrigerant is more environmentally friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of electrocatalytic ammonia synthesis, and in particular to a wind-solar complementary electrocatalytic ammonia production and refrigeration system applied to ships. Background Art

[0002] Existing technologies have been able to utilize nitrate-containing wastewater under catalytic conditions of different catalysts through electrocatalytic devices to catalyze the synthesis of ammonia from nitrate, thereby converting wastewater into usable energy. However, this technology is currently only in the laboratory stage, and there are some defects or details that can be optimized in the process of the existing technology, such as the energy source of the entire catalytic system, the application scenarios of the system, and the utilization methods of the products. For example, Chinese utility model patent CN117239191A mentions the use of hydrogen fuel cells to power the catalytic system, but hydrogen fuel has high transportation costs and high compression density during transportation, and has high safety risks. In addition, on ships, ammonia synthesized by electrocatalytic devices requires additional storage costs.

[0003] At present, there is no electrocatalytic ammonia production device specifically for ship scenarios. Therefore, developing an electrocatalytic ammonia production system for ships is of great significance to reducing the cost of ship washing wastewater treatment and reducing environmental pollution. Utility Model Content

[0004] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships, which can provide safer and greener energy for the electrocatalytic ammonia production device used on ships while reducing the cost of sewage treatment and ammonia storage.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] In a first aspect, an embodiment of the utility model provides a wind-solar complementary electrocatalytic ammonia production and refrigeration system applied to ships, comprising a wind-solar complementary power generation module, an electrocatalytic ammonia production module and a refrigeration module;

[0007] The wind-solar hybrid power generation module is used to convert wind energy and light energy into electrical energy for storage, and to supply electrical energy to the electrocatalytic ammonia production module;

[0008] The electrocatalytic ammonia production module is used to catalyze nitrate in ship washing wastewater using the electric energy generated by the wind-solar complementary power generation module under the action of a catalyst to obtain ammonia;

[0009] The refrigeration module is used to use the ammonia produced by the electrocatalytic ammonia production module as a circulating agent, and utilize the evaporation heat absorption of ammonia to enable the refrigeration module to have a refrigeration function.

[0010] Further, the electrocatalytic ammonia production module includes an electrocatalytic ammonia production reactor, and the electrocatalytic ammonia production reactor includes a cathode and an anode;

[0011] Among them, the overall reaction formula for ammonia production is: NO3 - +2H2O→NH3+O2+OH - ;

[0012] The reaction formula of the cathode is: NO3 - +8e - +H + →NH3+H2O(E 0 =0.88V);

[0013] The reaction formula of the anode is: 5H2O→2O2+9H + +8e - +OH - .

[0014] Furthermore, the electrocatalytic ammonia production module further includes a first collecting unit, a second collecting unit and an ammonia conduit;

[0015] The first collecting unit contains water and is used to collect ammonia gas generated by the electrocatalytic ammonia production reactor to obtain ammonia water with a first concentration;

[0016] The ammonia conduit is connected between the first collecting unit and the second collecting unit, and the ammonia water with the first concentration in the first collecting unit is purged by argon or nitrogen, and the obtained ammonia is transmitted to the second collecting unit through the ammonia conduit;

[0017] The second collecting unit contains water, which is used to enrich the ammonia gas transmitted by the ammonia gas conduit to obtain ammonia water of a second concentration;

[0018] The concentration of the second concentration ammonia water is greater than the concentration of the first concentration ammonia water.

[0019] Furthermore, the refrigeration module includes a solution pump, a generator, a condenser, a pressure reducing regulating valve, a throttle valve, an evaporator and an absorber;

[0020] The solution pump is used to pump the ammonia water of the second concentration in the second collecting unit into the generator;

[0021] The generator is used to heat the ammonia water of the second concentration to obtain ammonia vapor and ammonia water of the first concentration, and deliver the ammonia vapor to the condenser, and deliver the ammonia water of the first concentration to the absorber after being decompressed by the throttle valve;

[0022] The condenser is used to condense the ammonia vapor into high-pressure saturated liquid ammonia by releasing heat at a constant pressure, and transport it to the pressure reducing regulating valve;

[0023] The pressure reducing regulating valve is used to reduce the pressure and temperature of the high-pressure saturated liquid ammonia to form wet steam, and then deliver it to the evaporator;

[0024] The evaporator is used to absorb heat from the wet steam at a constant pressure to form dry steam, and then transport the dry steam to the absorber;

[0025] The absorber is used to absorb the dry steam delivered from the evaporator and the ammonia water of the first concentration delivered from the throttle valve to obtain the ammonia water of the second concentration, and the ammonia water of the second concentration is pumped into the generator again by the solution pump to realize circulation.

[0026] Furthermore, in the process of condensing ammonia vapor into high-pressure saturated liquid ammonia by releasing heat at a constant pressure, the released heat is absorbed and carried away by cooling water.

[0027] Furthermore, in the process of absorbing the dry steam delivered from the evaporator and the ammonia water of the first concentration delivered from the throttle valve to obtain the ammonia water of the second concentration, the heat released is absorbed and taken away by the cooling water.

[0028] Furthermore, the heat energy source of the generator is the waste heat generated by the ship engine.

[0029] Furthermore, the catalyst is a Cu-based catalyst.

[0030] Furthermore, the surface of the catalyst in the electrocatalytic ammonia production module is covered with nanomaterials.

[0031] Furthermore, the wind-solar complementary power generation module includes a wind turbine, a photovoltaic panel, a power electronic circuit and a battery;

[0032] The wind turbine is used to convert wind energy into electrical energy, and the photovoltaic panel is used to convert light energy into electrical energy;

[0033] The power electronic circuit is used to regulate and distribute the electric energy generated by the wind turbine and the photovoltaic panel, and store the excess electric energy in the battery.

[0034] Compared with the prior art, the beneficial effects of the utility model are:

[0035] While providing safer and greener energy for the application of electrocatalytic ammonia production equipment on ships, the cost of wastewater treatment and ammonia storage is reduced; the wind-solar complementary power generation technology is organically combined with the electrocatalytic ammonia production technology. Compared with the traditional high-temperature and high-pressure ammonia synthesis process, the utility model effectively reduces greenhouse gas emissions, makes the ammonia production process more environmentally friendly, and promotes the ammonia industry to move towards sustainable development; in addition, while treating ship washing wastewater and reducing environmental pollution, the product is used as a refrigerant for the refrigeration module, which can provide a better cooling effect. The refrigeration module using green ammonia as a refrigerant is more environmentally friendly than the traditional refrigeration method. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A block diagram of the structure of a wind-solar complementary electrocatalytic ammonia production and refrigeration system applied to ships provided in an embodiment of the utility model;

[0037] Figure 2 A schematic diagram of an electrocatalytic ammonia production reactor provided in an embodiment of the utility model;

[0038] Figure 3 A schematic diagram of a refrigeration module in a wind-solar complementary electrocatalytic ammonia production and refrigeration system applied to ships provided in an embodiment of the utility model;

[0039] Figure 4 A schematic diagram of the preparation and application of ammonia in a wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] In order to solve the above problems existing in the prior art, an embodiment of the utility model provides a wind-solar complementary electrocatalytic ammonia production and refrigeration system applied to ships, which is described in detail below.

[0042] Embodiment 1:

[0043] like Figure 1 As shown, Figure 1 A structural diagram of a wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships provided in an embodiment of the utility model includes a wind-solar complementary power generation module 101, an electrocatalytic ammonia production module 102 and a refrigeration module 103.

[0044] The wind-solar complementary power generation module 101 is used to convert wind energy and light energy into electrical energy for storage, and to supply electrical energy to the electrocatalytic ammonia production module 102 .

[0045] The wind-solar hybrid power generation module 101 includes a wind turbine, a photovoltaic panel, a power electronic circuit and a battery;

[0046] Wind turbines are used to convert wind energy into electrical energy, and photovoltaic panels are used to convert light energy into electrical energy; power electronic circuits are used to regulate and distribute the electrical energy generated by wind turbines and photovoltaic panels, and store excess electrical energy in batteries.

[0047] The utility model is applied to the treatment and refrigeration of ship washing wastewater. The wind-solar complementary power generation module can be installed on the ship to convert wind energy and solar energy into electrical energy. The solar photovoltaic panels and small horizontal axis wind turbines are arranged on the top of the poop, which can absorb more light energy and wind energy. The wind-solar complementary technology can achieve efficient utilization of clean energy.

[0048] The electrocatalytic ammonia production module 102 is used to catalyze nitrate ions in ship washing wastewater using the electric energy generated by the wind-solar complementary power generation module 101 under the action of a catalyst to obtain ammonia.

[0049] The electrocatalytic ammonia production module 102 includes an electrocatalytic ammonia production reactor, such as Figure 2 As shown, Figure 2 A schematic diagram of an electrocatalytic ammonia production reactor provided in an embodiment of the utility model, wherein the electrocatalytic ammonia production reactor comprises a cathode and an anode;

[0050] Among them, the overall reaction formula for ammonia production is: NO3 - +2H2O→NH3+O2+OH - ;

[0051] The cathode reaction is: NO3 - +8e - +H + →NH3+H2O(E 0 =0.88V);

[0052] The reaction formula at the anode is: 5H2O→2O2+9H + +8e - +OH - .

[0053] The electrocatalytic ammonia production module may further include a first collecting unit, a second collecting unit and an ammonia conduit;

[0054] The first collecting unit may be a container containing water, used to collect ammonia gas generated by the electrocatalytic ammonia production reactor to obtain ammonia water with a first concentration;

[0055] The ammonia conduit is connected between the first collecting unit and the second collecting unit, and the first concentration ammonia water in the first collecting unit is purged by argon or nitrogen, and the obtained ammonia is transmitted to the second collecting unit through the ammonia conduit;

[0056] The second collecting unit may be a container filled with water, which is used to enrich the ammonia gas transmitted by the ammonia gas conduit to obtain ammonia water of a second concentration; the ammonia water of the second concentration has a higher concentration than the ammonia water of the first concentration.

[0057] Argon and nitrogen are both inert gases. Their chemical properties are stable and they do not react chemically with ammonia, which means that during the purge process, these gases will not consume or change the properties of ammonia, but only play a physical role. When Ar or N2 is used to purge dilute ammonia water, these inert gases can help push ammonia to escape from the dilute ammonia water. The ammonia can then be absorbed by the second collection unit, thereby increasing the concentration of ammonia in the second collection unit and forming high-concentration ammonia water.

[0058] Since the ammonia in the first collection unit is continuously purged into the second collection unit, the ammonia concentration in the first collection unit will not reach saturation, so the ammonia produced by the electrocatalytic ammonia production reactor can be continuously absorbed. In this way, the ammonia produced by the electrocatalytic ammonia production reactor can be completely transferred to the second collection unit and subsequently used as a circulating agent for the refrigeration system.

[0059] The catalyst in the electrocatalytic ammonia reactor can be a Cu-based catalyst. Cu is one of the important non-precious metal catalysts for synthesizing ammonia. Copper, as a low-cost transition metal, has an adjustable electronic structure and flexible electrochemical activity. Compared with many precious metals, copper has better catalytic performance in nitrate transamination.

[0060] like Figure 3 As shown, Figure 3 A schematic diagram of a refrigeration module provided by an embodiment of the utility model, comprising a solution pump, a generator, a condenser, a pressure reducing regulating valve, a throttle valve, an evaporator and an absorber;

[0061] The solution pump is used to pump the ammonia water with a second concentration in the second collection unit into the generator;

[0062] The generator is used to heat the ammonia water of the second concentration to obtain ammonia vapor and ammonia water of the first concentration, and transport the ammonia vapor to the condenser, and transport the ammonia water of the first concentration to the absorber after being reduced in pressure by the throttle valve;

[0063] The condenser is used to condense ammonia vapor into high-pressure saturated liquid ammonia at a constant pressure and then transport it to the pressure reducing regulating valve. In the process of condensing ammonia vapor into high-pressure saturated liquid ammonia at a constant pressure, the heat released is absorbed and carried away by cooling water.

[0064] The pressure reducing regulating valve is used to reduce the pressure and temperature of high-pressure saturated liquid ammonia to form wet steam, and then transport it to the evaporator;

[0065] The evaporator is used to absorb heat from wet steam at a constant pressure to form dry steam, which is then transported to the absorber;

[0066] The absorber is used to absorb the dry steam delivered from the evaporator and the ammonia water of the first concentration delivered from the throttle valve to obtain the ammonia water of the second concentration. The ammonia water of the second concentration is pumped into the generator again by the solution pump to realize circulation.

[0067] The ammonia saturated liquid drawn from the condenser is throttled, decompressed and cooled in the pressure reducing regulating valve to form wet steam with low dryness, and is sent to the evaporator to absorb heat at a constant pressure to become dry saturated steam, and then enters the absorber. At the same time, the dilute ammonia solution enters the absorber after being decompressed by the throttle valve from the generator. The dilute ammonia solution absorbs the ammonia vapor and becomes a concentrated ammonia solution. During the absorption process, the heat released by the condensation of ammonia vapor is taken away by the cooling water to keep the ammonia solution in the absorber at a lower temperature so that more ammonia vapor can be absorbed. The concentrated ammonia solution is pressurized by the solution pump and enters the ammonia vapor generator. The concentrated ammonia solution is heated by an external heat source, and ammonia vapor is evaporated to become a dilute ammonia solution. The ammonia vapor enters the condenser and releases heat at a constant pressure to condense into a saturated liquid to complete the cycle. Liquid ammonia evaporates and absorbs heat in the evaporator, thereby achieving the purpose of refrigeration.

[0068] like Figure 4 As shown, Figure 4 A schematic diagram of the preparation and application of ammonia in a wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships provided in an embodiment of the utility model.

[0069] The utility model provides a wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships, which provides safer and greener energy for the electrocatalytic ammonia production device used on ships, while reducing the cost of wastewater treatment and ammonia storage; the wind-solar complementary power generation technology and the electrocatalytic ammonia production technology are organically combined. Compared with the traditional high-temperature and high-pressure ammonia synthesis process, the utility model effectively reduces greenhouse gas emissions, makes the ammonia production process more environmentally friendly, and promotes the ammonia industry to move towards sustainable development; in addition, while treating ship washing wastewater and reducing environmental pollution, the product is used as a refrigerant for the refrigeration module to provide a better cooling effect. The refrigeration module using green ammonia as a refrigerant is more environmentally friendly than traditional refrigeration methods.

[0070] Embodiment 2:

[0071] On the basis of the first embodiment, the catalyst surface may also be covered with nanomaterials to increase the reaction surface area and improve the catalytic efficiency.

[0072] Embodiment three:

[0073] On the basis of the first or second embodiment, the heat energy source of the generator is the waste heat generated by the ship engine, and the heat can be applied to the generator through the heat exchanger, so that the utilization rate of energy can be further improved.

[0074] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0075] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0077] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0079] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A wind-solar complementary electrocatalytic ammonia production and refrigeration system applied to ships, characterized in that: It includes wind-solar hybrid power generation module, electrocatalytic ammonia production module and refrigeration module; The wind-solar hybrid power generation module is used to convert wind energy and light energy into electrical energy for storage, and to supply electrical energy to the electrocatalytic ammonia production module; The electrocatalytic ammonia production module is used to catalyze nitrate in ship washing wastewater using the electric energy generated by the wind-solar complementary power generation module under the action of a catalyst to obtain ammonia; The refrigeration module is used to use the ammonia produced by the electrocatalytic ammonia production module as a circulating agent, and utilize the evaporation heat absorption of ammonia to enable the refrigeration module to have a refrigeration function.

2. The wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships according to claim 1 is characterized in that: The electrocatalytic ammonia production module comprises an electrocatalytic ammonia production reactor, and the electrocatalytic ammonia production reactor comprises a cathode and an anode; Among them, the overall reaction formula for ammonia production is: NO3 - +2H2O→NH3+O2+OH - ; The reaction formula of the cathode is: NO3 - +8e - +H + →NH3+H2O(E 0 =0.88V); The reaction formula of the anode is: 5H2O→2O2+9H + +8e - +OH - .

3. The wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships according to claim 2 is characterized in that: The electrocatalytic ammonia production module further includes a first collecting unit, a second collecting unit and an ammonia conduit; The first collecting unit contains water and is used to collect ammonia gas generated by the electrocatalytic ammonia production reactor to obtain ammonia water with a first concentration; The ammonia conduit is connected between the first collecting unit and the second collecting unit, and the ammonia water with the first concentration in the first collecting unit is purged by argon or nitrogen, and the obtained ammonia is transmitted to the second collecting unit through the ammonia conduit; The second collecting unit contains water, which is used to enrich the ammonia gas transmitted by the ammonia gas conduit to obtain ammonia water of a second concentration; The concentration of the second concentration ammonia water is greater than the concentration of the first concentration ammonia water.

4. The wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships according to claim 3 is characterized in that: The refrigeration module includes a solution pump, a generator, a condenser, a pressure reducing regulating valve, a throttle valve, an evaporator and an absorber; The solution pump is used to pump the ammonia water of the second concentration in the second collecting unit into the generator; The generator is used to heat the ammonia water of the second concentration to obtain ammonia vapor and ammonia water of the first concentration, and deliver the ammonia vapor to the condenser, and deliver the ammonia water of the first concentration to the absorber after being decompressed by the throttle valve; The condenser is used to condense the ammonia vapor into high-pressure saturated liquid ammonia by releasing heat at a constant pressure, and transport it to the pressure reducing regulating valve; The pressure reducing regulating valve is used to reduce the pressure and temperature of the high-pressure saturated liquid ammonia to form wet steam, and then deliver it to the evaporator; The evaporator is used to absorb heat from the wet steam at a constant pressure to form dry steam, and then transport the dry steam to the absorber; The absorber is used to absorb the dry steam delivered from the evaporator and the ammonia water of the first concentration delivered from the throttle valve to obtain the ammonia water of the second concentration, and the ammonia water of the second concentration is pumped into the generator again by the solution pump to realize circulation.

5. The wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships according to claim 4 is characterized in that: In the process of the condenser condensing the ammonia vapor at a constant pressure and releasing heat to form high-pressure saturated liquid ammonia and transporting it to the pressure reducing regulating valve, the heat released by the ammonia vapor is absorbed and taken away by the cooling water.

6. The wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships according to claim 4 is characterized in that: In the process of absorbing the dry steam delivered from the evaporator and the ammonia water of the first concentration delivered from the throttle valve to obtain the ammonia water of the second concentration, the released heat is absorbed and taken away by the cooling water.

7. The wind-solar hybrid electrocatalytic ammonia production and refrigeration system for ships according to claim 4 is characterized in that: The heat energy source of the generator is the waste heat generated by the ship engine.

8. The wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships according to claim 1 is characterized in that: The catalyst is a Cu-based catalyst.

9. The wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships according to claim 8 is characterized in that: The catalyst surface in the electrocatalytic ammonia production module is covered with nanomaterials.

10. The wind-solar complementary electrocatalytic ammonia production and refrigeration system for ships according to claim 1, characterized in that: The wind-solar complementary power generation module includes a wind turbine, a photovoltaic power generation panel, a power electronic circuit and a battery; The wind turbine is used to convert wind energy into electrical energy, and the photovoltaic panel is used to convert light energy into electrical energy; The power electronic circuit is used to regulate and distribute the electric energy generated by the wind turbine and the photovoltaic panel, and store the excess electric energy in the battery.

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