Electrochemical ammonia synthesis device based on offshore energy comprehensive utilization platform

By designing a multi-spiral trough structure and an electrochemical synthesis ammonia synthesis device with circulating flow of electrolyte on the offshore energy comprehensive utilization platform, the problems of small contact surfaces between the electrode sheet and the electrolyte and bubble accumulation are solved, and the reaction efficiency and yield of the synthesis ammonia are improved.

CN222923254UActive Publication Date: 2025-05-30JIANGSU UNIV OF SCI & TECH
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Patent Information

Application Number
CN202422061995.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-26
Publication Date
2025-05-30
Estimated Expiration
2034-08-26

AI Technical Summary

Technical Problem

In the existing electrochemical ammonia synthesis technology, the contact surface between the electrode sheet and the electrolyte is small, and the injected gas causes bubbles to accumulate, hindering the contact between the gas and the electrode, resulting in a decrease in the yield of synthesis ammonia.

Method used

An electrochemical ammonia synthesis device based on the comprehensive utilization platform of offshore energy is designed. By setting up a spiral groove No. 1 and spiral groove No. 2 on the inner walls of the inner tank and the outer tank, and placing anode sheet and cathode sheet respectively, the contact area between the gas and the electrolyte is significantly increased, and the circulating flow of the electrolyte is used to reduce bubble accumulation.

Benefits of technology

By increasing the contact area between gas and electrolyte and circulating flow, the reaction efficiency of synthetic ammonia is significantly improved, bubble accumulation is reduced, and the activity of the electrode surface is maintained, ensuring the continuous and efficient progress of the reaction.

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Abstract

The utility model discloses an electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform, which belongs to the field of electrochemical ammonia synthesis and comprises an inner tank and an outer tank, and the inner tank is arranged in the outer tank; a plurality of first spiral grooves and a plurality of second spiral grooves are formed in the inner wall of the outer tank and the inner side wall and the outer side wall of the inner tank correspondingly, anode pieces are arranged in the first spiral grooves and are the same as the first spiral grooves in shape, cathode pieces are arranged in the second spiral grooves and are the same as the second spiral grooves in shape, and the cathode pieces are arranged in the first spiral grooves. Air outlets are formed in the anode plate and the cathode plate; the top of the outer tank is connected with a top connecting piece; the first spiral groove and the second spiral groove are formed in the inner wall of the inner tank and the inner wall of the outer tank, and the anode piece and the cathode piece are placed in the first spiral groove and the second spiral groove respectively, so that the effective contact area of gas and electrolyte is remarkably increased, gas molecules can be more uniformly dispersed into the electrolyte, the situation that the local gas concentration is too high or too low is reduced, and the service life of the electrolyte is prolonged. Therefore, the reaction efficiency of ammonia synthesis is improved.
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Description

Technical Field

[0001] This utility model belongs to the technical field of electrochemical ammonia synthesis, and specifically relates to an electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform. Background Art

[0002] In China's chemical and energy industries, the production of synthetic ammonia occupies a crucial position. It is a key raw material for industries such as fertilizers and pharmaceuticals, and is of great significance to agricultural production and the development of the national economy. However, the production process of synthetic ammonia faces challenges such as complex technological processes and high energy consumption, and also brings environmental problems that cannot be ignored.

[0003] The traditional synthetic ammonia technological process involves multiple steps such as the preparation of raw material gases, purification, synthesis reaction, and separation of ammonia. First, the raw material gases are mainly nitrogen and hydrogen. Nitrogen is sourced from the air, while hydrogen is usually obtained through natural gas reforming or water electrolysis. Before the raw material gases enter the synthesis reactor, they also need to undergo strict purification to remove impurities and harmful substances. Then, under the action of a catalyst, nitrogen and hydrogen undergo a synthesis reaction under high temperature and high pressure conditions to produce ammonia. Finally, through separation and purification steps, synthetic ammonia products meeting industrial requirements are obtained.

[0004] However, this traditional process has many drawbacks. First, the reaction for synthesizing ammonia needs to be carried out under high temperature and high pressure conditions, which not only increases equipment investment and operating costs but also consumes a large amount of energy. According to statistics, the energy consumption for synthetic ammonia production accounts for a relatively large proportion of the entire chemical and energy industries and is one of the five major energy-consuming focuses. Second, the catalysts used in the traditional process are usually made of metal compounds such as iron, cobalt, and molybdenum. These catalysts are prone to deactivation at high temperatures and need to be replaced regularly, increasing production costs and environmental pollution. In addition, a large amount of by-products such as greenhouse gases like carbon dioxide are generated during the process of synthesizing ammonia by the traditional process. The emissions of these gases not only exacerbate the trend of global warming but also have a serious impact on the environment.

[0005] To overcome the drawbacks of the traditional process, ambient temperature and pressure electrocatalytic ammonia synthesis technology has gradually emerged. This technology reduces nitrogen to ammonia through an electrochemical method and has advantages such as mild reaction conditions, low energy consumption, and no by-products. However, there are still some technical problems with the current ambient temperature and pressure electrocatalytic ammonia synthesis technology. For example, in CN2015110192233, a carbon-free footprint ammonia synthesis device, method, and its application, the contact area between the electrode plate and the electrolyte is relatively small. At the same time, injecting gas will cause bubbles to accumulate on the electrode surface, forming a gas film that hinders the contact between the gas and the electrode, resulting in a reduction in the ammonia synthesis yield. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present utility model is to provide an electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform in view of the deficiencies of the prior art, so as to solve the existing problems that the contact area between the electrode plate and the electrolyte is small, and injecting gas will cause bubbles to accumulate on the electrode surface, resulting in a reduction in the ammonia synthesis yield.

[0007] An electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform includes an inner tank and an outer tank, and the inner tank is arranged inside the outer tank; a plurality of first spiral grooves and a plurality of second spiral grooves are provided on the inner wall of the outer tank and the inner and outer side walls of the inner tank. An anode plate is arranged inside the first spiral groove, and the anode plate has the same shape as the first spiral groove. A cathode plate is arranged inside the second spiral groove, and the cathode plate has the same shape as the second spiral groove. Air outlets are provided on the anode plate and the cathode plate.

[0008] The top of the outer tank is connected with a top connector, and a gas outlet is arranged at the top of the top connector. The gas outlet is connected to a gas collector through a pipeline.

[0009] One side of the top connector is communicated with the top of the inner cavity of the electrolyte tank through a first electrolyte circulation pipe, and the bottom of the electrolyte tank is communicated with the inside of the chassis through a second electrolyte circulation pipe.

[0010] The bottoms of the inner tank and the outer tank are provided with a bottom connector, and the bottom connector includes an inner water inlet part, an inner air inlet part, an outer water inlet part, an outer air inlet part and a chassis. The inner water inlet part, the inner air inlet part, the outer water inlet part and the outer air inlet part are sleeved on the top of the chassis in sequence from the inside to the outside.

[0011] A plurality of inner water inlets and outer water inlets are respectively arranged on the inner water inlet part and the outer water inlet part. The liquid coming out of the inner water inlet enters the inner tank, and the liquid coming out of the outer water inlet enters the space between the inner tank and the outer tank. A plurality of inner air inlets and outer air inlets are respectively arranged on the inner walls of the inner air inlet part and the outer air inlet part. The plurality of inner air inlets and outer air inlets are respectively communicated with the bottoms of the first spiral grooves and the second spiral grooves on the inner tank and the outer tank.

[0012] A flow control component is arranged on the bottom connection component, and the flow control component includes an inner control part, an outer control part and a driving component. The inner control part is in a frustum shape. A groove is arranged at the bottom of the inner water inlet part, and the inner control part is arranged in the groove. An installation groove is opened at the bottom of the outer water inlet part. The outer control part is in an annular shape and is rotatably arranged in the installation groove. A communication port is opened on the outer control part, and the number of the communication ports is the same as the number of the outer water inlets, and the positions correspond one by one. The diameter of the communication port is larger than the diameter of the outer water inlet. A tooth groove is arranged at the bottom of the outer control part.

[0013] The driving component includes a cam and a bevel gear. Both the cam and the bevel gear are installed on a transmission shaft. One end of the transmission shaft is arranged on the output shaft of a driving motor. The bevel gear is meshed and connected with a tooth groove. The cam is arranged at the bottom of the inner water inlet part.

[0014] To optimize the above technical solution, the specific measures taken also include:

[0015] Further, a plurality of the first spiral grooves and a plurality of the second spiral grooves are arranged crosswise.

[0016] Further, the top connecting part is in a funnel shape.

[0017] Further, a stay part is arranged at the bottom of the chassis. The stay part is divided into a hydrogen stay layer and a nitrogen stay layer. A plurality of gas transmission pipes are arranged on both the hydrogen stay layer and the nitrogen stay layer.

[0018] Further, a plurality of the gas transmission pipes are respectively communicated with an inner air inlet and an outer air inlet.

[0019] Further, a water inlet groove is arranged at the top of the chassis.

[0020] Further, a plurality of the inner air inlets and the outer air inlets are arranged obliquely upward, and a plurality of the inner air inlets and a plurality of the outer air inlets are rotationally symmetrically arranged.

[0021] Further, the diameter of the bottom opening of the groove is smaller than the maximum diameter at the top of the inner control part.

[0022] Further, a limiting rod is connected to the top of the groove. The inner control part can be movably sleeved on the limiting rod up and down. An elastic part is sleeved on the limiting rod. Two ends of the elastic part respectively abut against the inner wall of the groove and the top of the inner control part.

[0023] Further, a first limiting net is arranged inside the inner tank. A second limiting net and a third limiting net are arranged between the inner tank and the outer tank. The first limiting net is arranged close to the inner wall of the inner tank. The second limiting net and the third limiting net are respectively arranged close to the outer wall of the inner tank and the inner wall of the outer tank.

[0024] Advantages of the present utility model:

[0025] By arranging the first spiral grooves and the second spiral grooves on the inner walls of the inner tank and the outer tank, and placing the anode plate and the cathode plate therein respectively, the effective contact area between the gas and the electrolyte is significantly increased, enabling the gas molecules to be more evenly dispersed into the electrolyte, reducing the situation of too high or too low local gas concentration, and thus improving the reaction efficiency of ammonia synthesis; the circulating flow of the electrolyte helps to disperse and transfer the bubbles generated on the electrode surface. The circulating flow can effectively reduce the accumulation of bubbles, maintain the activity of the electrode surface, and ensure the continuous and efficient progress of the reaction. Brief Description of the Drawings

[0026] Figure 1 It is a cross-sectional view of an electrochemical ammonia synthesis device;

[0027] Figure 2 It is Figure 1 an enlarged view of part A in

[0028] Figure 3 It is Figure 1 a schematic diagram of three limiting meshes;

[0029] Figure 4 It is Figure 1 an exploded view of the bottom connector and the flow control component in

[0030] Figure 5 It is Figure 4 a schematic diagram of the inner air inlet part and the outer control part in

[0031] Figure 6 an exploded view of the bottom connector;

[0032] Figure 7 a schematic diagram of the separation structure of the retention part and the chassis;

[0033] Figure 8 a cross-sectional view of each installation of the outer tank anode and cathode plates;

[0034] Figure 9 a bottom view of the outer control part;

[0035] Figure 10 a bottom view of the retention part and the bottom connector.

[0036] Reference Numerals:

[0037] Inner filling 10, air outlet 101, first limiting net 102, second limiting net 103, third limiting net 104, first spiral groove 1101, second spiral groove 1102, outer filling 20, anode plate 10A, cathode plate 10B, top connecting piece 210, gas outlet 2101, electrolyte filling 30, first electrolyte circulation pipe 310, second electrolyte circulation pipe 320, reciprocating double pump 321, bottom connecting piece 40, inner water inlet 4001, inner air inlet 4002, outer water inlet 4003, outer air inlet 4004, inner water inlet part 401, groove 4011, limiting rod 4012, elastic part 4013, inner air inlet part 402, outer water inlet part 403, installation groove 4031, outer air inlet part 404, chassis 405, water inlet groove 4051, staying layer 406, hydrogen staying layer 4061, nitrogen staying layer 4062, gas transmission pipe 4063, nitrogen transmission pump 50, hydrogen transmission pump 60, inner control part 710, outer control part 720, communication port 7201, tooth groove 7202, drive assembly 730, cam 731, bevel gear 732, transmission shaft 733. Detailed implementation manners

[0038] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings of the specification.

[0039] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0040] Please refer to Figure 1 and Figure 6 , this utility model provides an electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform, including an inner filling 10 and an outer filling 20, and the inner filling 10 is arranged inside the outer filling 20; a plurality of first spiral grooves 1101 and a plurality of second spiral grooves 1102 are arranged on the inner wall of the outer filling 20 and the inner and outer side walls of the inner filling 10, and the plurality of first spiral grooves 1101 and the plurality of second spiral grooves 1102 are arranged in a cross manner. Hydrogen can be injected into the first spiral groove 1101, nitrogen can be injected into the second spiral groove 1102, an anode plate 10A is arranged inside the first spiral groove 1101, the anode plate 10A has the same shape as the first spiral groove 1101, a cathode plate 10B is arranged inside the second spiral groove 1102, and the cathode plate 10B has the same shape as the second spiral groove 1102.

[0041] Please refer to Figure 1 and Figure 6, Cathode sheet 10B (WE): Pure stainless steel (SSC) is used as the gas diffusion electrode. This structure allows gases or substances such as nitrogen, ammonia, and possibly reduced lithium to pass through and reach the reactive sites of the electrode;

[0042] Please refer to Figure 1 and Figure 6 , Anode sheet 10A (CE): Stainless steel (SSC) is used as the substrate, and the PtAu catalyst is loaded on the SSC by the hydrogen bubble method to form a PtAu / SSC composite electrode. In this electrode, stainless steel (SSC) serves as the support material and gas diffusion electrode, while the PtAu catalyst is the reactive site for the electrochemical reaction.

[0043] Please refer to Figure 1 , At the top of the outer filling 20, there is a top connector 210. The top connector 210 is funnel-shaped, and the top gas outlet 2101 of the top connector 210 is connected to the gas collector through a pipe. One side of the top connector 210 is connected to the top of the inner cavity of the electrolyte filling 30 through a first electrolyte circulation pipe 310.

[0044] Please refer to Figure 1-10 , At the bottom of the inner filling 10 and the outer filling 20, there is a bottom connector 40. The bottom connector 40 includes an inner water inlet 401, an inner gas inlet 402, an outer water inlet 403, an outer gas inlet 404, and a chassis 405. The inner water inlet 401, the inner gas inlet 402, the outer water inlet 403, and the outer gas inlet 404 are sequentially sleeved on the top of the chassis 405 from the inside out. There is a water inlet groove 4051 on the top of the chassis 405. One side of the chassis 405 can be connected to the bottom of the electrolyte filling 30 through a reciprocating two-way pump 321 and a second electrolyte circulation pipe 320;

[0045] Multiple inner water inlets 4001 and outer water inlets 4003 are respectively provided on the inner water inlet 401 and the outer water inlet 403. The liquid coming out of the inner water inlet 4001 enters the inner filling 10, and the liquid coming out of the outer water inlet 4003 enters the space between the inner filling 10 and the outer filling 20.

[0046] Multiple inwardly inclined inner gas inlets 4002 and outer gas inlets 4004 are respectively provided on the inner walls of the inner gas inlet 402 and the outer gas inlet 404. The multiple inner gas inlets 4002 and the multiple outer gas inlets 4004 are rotationally symmetrically arranged. The multiple inner gas inlets 4002 and the multiple outer gas inlets 4004 are respectively connected to the bottoms of the first spiral groove 1101 and the second spiral groove 1102 on the inner tank 10 and the outer tank 20.

[0047] A stay member 406 is provided at the bottom of the chassis 405. The stay member 406 is divided into a hydrogen stay layer 4061 and a nitrogen stay layer 4062. A plurality of gas delivery pipes 4063 are provided on both the hydrogen stay layer 4061 and the nitrogen stay layer 4062. The plurality of gas delivery pipes 4063 are alternately connected to the inner air inlet 4002 and the outer air inlet 4004 in a cross - pattern. Since the air inlet slots of the first spiral groove 1101 and the second spiral groove 1102 form a circle, the gases injected into adjacent air inlets are different, so the plurality of gas delivery pipes 4063 need to be arranged in a cross - pattern. The delivery ends of the nitrogen delivery pump 50 and the hydrogen delivery pump 60 are respectively connected to the nitrogen stay layer 4062 and the hydrogen stay layer 4061.

[0048] A flow control assembly is provided on the bottom connection assembly 40. The flow control assembly includes an inner control member 710, an outer control member 720, and a drive assembly 730. The inner control member 710 is in the shape of a frustum of a cone. A groove 4011 is provided at the bottom of the inner water inlet member 401. A limiting rod 4012 is connected to the top of the groove 4011. The inner control member 710 can be movably sleeved on the limiting rod 4012 up and down. An elastic member 4013 is sleeved on the limiting rod 4012. The two ends of the elastic member 4013 respectively abut against the inner wall of the groove 4011 and the top of the inner control member 710. The diameter of the bottom opening of the groove 4011 is smaller than the maximum diameter of the top of the inner control member 710, which can prevent the inner control member 710 from moving out of the groove 4011.

[0049] An installation groove 4031 is provided at the bottom of the outer water inlet member 403. The outer control member 720 is in the shape of a circular ring and is rotatably arranged in the installation groove 4031. A communication port 7201 is provided on the outer control member 720. The number of the communication ports 7201 is the same as the number of the outer water inlets 4003, and their positions correspond one by one. The diameter of the communication port 7201 is larger than the diameter of the outer water inlet 4003. A toothed groove 7202 is provided at the bottom of the outer control member 720.

[0050] The drive assembly 730 includes a cam 731 and a bevel gear 732. Both the cam 731 and the bevel gear 732 are installed on a transmission shaft 733. One end of the transmission shaft 733 is arranged on the output shaft of a drive motor. The bevel gear 732 is meshed with the toothed groove 7202. The cam 731 is arranged at the bottom of the inner water inlet member 401.

[0051] Since the distance between the plurality of inner water inlets 4001 is different from the distance between the plurality of outer water inlets 4003, and their positions and shapes are different, the cam 731 and the bevel gear 732 are used for driving to realize the flow and closing of the flow rate.

[0052] The anode plate 10A and the cathode plate 10B are provided with air outlets 101. A first limiting net 102 is arranged inside the inner filling 10. A second limiting net 103 and a third limiting net 104 are arranged between the inner filling 10 and the outer filling 20. The first limiting net 102 is arranged close to the inner wall of the inner filling 10. The second limiting net 103 and the third limiting net 104 are respectively arranged close to the outer wall of the inner filling 10 and the inner wall of the outer filling 20. The mesh diameter values of the first limiting net 102, the second limiting net 103 and the third limiting net 104 are smaller than the diameter value of the air outlet 101. The first limiting net 102 and the second limiting net 103 are used to prevent gases (nitrogen, hydrogen) from quickly moving away from the anode plate 10A and the cathode plate 10B. By slowing down the diffusion rate of the gases, it helps to maintain a certain gas concentration around the electrode plates, thereby improving the efficiency of the electrochemical reaction. Ensure that gas molecules can contact the active sites on the electrode surface for a longer time to promote the progress of the reaction.

[0053] The gas pressure inside the first spiral groove 1101 and the second spiral groove 1102 is greater than the internal pressure of the tank body, so that the gas inside the first spiral groove 1101 and the second spiral groove 1102 can be discharged into the tank body from the air outlet 101.

[0054] The usage process of this utility model: The nitrogen delivery pump 50 and the hydrogen delivery pump 60 are used to inject hydrogen and hydrogen into the nitrogen retention layer 4062 and the hydrogen retention layer 4061 respectively. The hydrogen and nitrogen enter the first spiral groove 1101 and the second spiral groove 1102 on the inner filling 10 through the inner air inlet 4002 by means of the alternately arranged gas delivery pipes 4063. Similarly, the hydrogen and nitrogen enter the first spiral groove 1101 and the second spiral groove 1102 on the outer filling 20 through the outer air inlet 4004. Subsequently, the nitrogen and hydrogen enter between the inner filling 10 and the inner and outer fillings through the air outlets 101 on the anode and cathode plates.

[0055] The reciprocating double - acting pump 321 on the second electrolyte circulation pipe 320 is started. The electrolyte enters the water inlet tank 4051 in the chassis 405 from the electrolyte tank 30 through the second electrolyte circulation pipe 520. Under the action of pressure, the drive motor drives the drive shaft 733 to rotate. The drive shaft 733 drives the cam 731 and the bevel gear 732 to rotate. The cam 731 pushes up the inner control part 710. The inner control part 710 compresses the elastic part 4013, and the electrolyte flows into the groove 4011 from around the inner control part 710. The bevel gear 732 rotates to drive the outer control part 720 to rotate through the tooth groove 7202, so that the communication port 7201 coincides with the outer water inlet 4003, and the electrolyte enters the inside of the inner filling 10 and between the inner and outer fillings through the inner water inlet 4001 and the outer water inlet 4003. When the electrolyte is at a high position in the first electrolyte circulation pipe 310, the electrolyte returns to the electrolyte tank 30 from the first electrolyte circulation pipe 310 to realize the electrolyte circulation;

[0056] Nitrogen is introduced into the second spiral groove 1102 and meets the energized cathode; hydrogen is introduced into the first spiral groove 1101 and meets the energized anode, and is electrolyzed into hydrogen ions. In the electrolyte, lithium ions are reduced to metallic lithium on the surface of the cathode electrode. The metallic lithium reacts with nitrogen to form lithium nitride. Lithium nitride and hydrogen ions react under the action of ethanol to generate ammonia gas, and the ammonia gas floats up and is collected through the gas outlet 2101.

[0057] The above are only the embodiments of the present utility model. Common knowledge such as well-known characteristics in the solution is not described in detail here. Those of ordinary skill in the art know all the common technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can know all the existing technologies in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, combine their own abilities to complete and implement this solution. Some typical well-known methods should not become an obstacle for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the premise of the present utility model, several deformations and improvements can also be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and other records in the specification can be used to interpret the content of the claims.

Claims

1. An electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform, characterized in that: It comprises an inner pot and an outer pot, wherein the inner pot is arranged in the outer pot, and the inner wall of the outer pot and the inner and outer side walls of the inner pot are both provided with a plurality of No. 1 spiral grooves and a plurality of No. 2 spiral grooves, wherein an anode sheet is arranged inside the No. 1 spiral groove, and the anode sheet has the same shape as the No. 1 spiral groove, and a cathode sheet is arranged inside the No. 2 spiral groove, and the cathode sheet has the same shape as the No. 2 spiral groove, and gas outlets are provided on the anode sheet and the cathode sheet; The top of the external filling is connected with a top connecting piece, the top of the top connecting piece is provided with a gas outlet, and the gas outlet is connected to a gas collector through a pipeline; One side of the top connector is connected to the top of the inner cavity of the electrolyte tank through a No. 1 electrolyte circulation pipe, and the bottom of the electrolyte tank is connected to the inside of the chassis through a No. 2 electrolyte circulation pipe; The bottom of the inner filling and the outer filling is provided with a bottom connecting piece, and the bottom connecting piece includes an inner water inlet piece, an inner air inlet piece, an outer water inlet piece, an outer air inlet piece and a bottom plate, and the inner water inlet piece, the inner air inlet piece, the outer water inlet piece and the outer air inlet piece are sequentially sleeved and arranged on the top of the bottom plate from the inside to the outside; The inner water inlet and the outer water inlet are respectively provided with a plurality of inner water inlets and outer water inlets, the liquid coming out of the inner water inlets enters the inner tank, and the liquid coming out of the outer water inlets enters between the inner tank and the outer tank, the inner walls of the inner air inlet and the outer air inlet are respectively provided with a plurality of inner air inlets and outer air inlets, the plurality of inner air inlets and outer air inlets are respectively connected with the bottoms of the No. 1 spiral groove and the No. 2 spiral groove on the inner tank and the outer tank; The bottom connection assembly is provided with a flow control assembly, and the flow control assembly includes an inner control member, an outer control member and a driving assembly. The inner control member is in a truncated cone shape, and a groove is provided at the bottom of the inner water inlet member, and the inner control member is arranged in the groove. A mounting groove is provided at the bottom of the outer water inlet member, and the outer control member is in a circular ring shape, and the outer control member can be rotatably arranged in the mounting groove. A connecting port is provided on the outer control member, and the number of the connecting ports corresponds to the number of the outer water inlet ports in a one-to-one correspondence, and the diameter of the connecting port is larger than the diameter of the outer water inlet port, and a tooth groove is provided at the bottom of the outer control member; The driving assembly includes a cam and a bevel gear, both of which are mounted on a transmission shaft, one end of which is arranged on an output shaft of a driving motor, the bevel gear is meshed with a tooth groove, and the cam is arranged at the bottom of the inner water inlet.

2. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 1, characterized in that: The plurality of first spiral grooves and the plurality of second spiral grooves are arranged crosswise with each other.

3. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 1, characterized in that: The top connecting piece is funnel-shaped.

4. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 1, characterized in that: A retention member is arranged at the bottom of the chassis, and the retention member is divided into a hydrogen retention layer and a nitrogen retention layer. A plurality of gas delivery pipes are arranged on the hydrogen retention layer and the nitrogen retention layer.

5. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 4 is characterized by: The plurality of air delivery pipes are respectively connected to the inner air inlet and the outer air inlet.

6. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 1, characterized in that: A water inlet trough is arranged on the top of the chassis.

7. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 1, characterized in that: The plurality of inner air inlets and outer air inlets are arranged obliquely upward, and the plurality of inner air inlets and the plurality of outer air inlets are arranged rotationally symmetrically.

8. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 1, characterized in that: The opening diameter of the bottom of the groove is smaller than the maximum diameter of the top of the inner control part.

9. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 1, characterized in that: The top of the groove is connected with a limit rod, the inner control part is sleeved on the limit rod and can move up and down, an elastic part is sleeved on the limit rod, and two ends of the elastic part respectively abut against the inner wall of the groove and the top of the inner control part.

10. The electrochemical ammonia synthesis device based on an offshore energy comprehensive utilization platform according to claim 1, characterized in that: A No. 1 limiting net is arranged inside the inner pot, and a No. 2 limiting net and a No. 3 limiting net are arranged between the inner pot and the outer pot. The No. 1 limiting net is arranged close to the inner wall of the inner pot, and the No. 2 limiting net and the No. 3 limiting net are arranged close to the outer wall of the inner pot and the inner wall of the outer pot respectively.