Novel hydrogen drying device for electrolytic cell purification system

Abstract

The utility model discloses a novel hydrogen drying device for an electrolytic cell purification system, which comprises a drying tower group consisting of a plurality of drying tower equipment, an improved process route used under a corresponding low-load working condition, an external circulation flow, a secondary circulation flow and an internal circulation flow, the starting point end of the external circulation process is connected with a product hydrogen delivery pipe, and the ending point end of the external circulation process is connected in front of drying tower equipment on the upstream side of the basic process route, so that the process flow between the starting point end and the ending point end on the basic process route becomes a common process of the improved process route and the basic process route; the improved process route establishes a low-condition cycle between a common flow and an outer cycle flow. The minimum working gas flow of the drying tower is maintained through the circulating fan during low load, and the short-circuit phenomenon is avoided. And circulation can be realized only by a low-power fan, and the energy consumption is far lower than that of restarting the compressor, so that energy conservation and consumption reduction are realized. The drying agent can be thoroughly regenerated through stable regeneration gas flow, and the replacement frequency is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen production process technical field, concretely relates to a novel electrolytic cell purification system hydrogen drying device. BACKGROUND

[0002] In the field of hydrogen production by wind and light power generation and hydrogen purification, the existing drying system often adopts mature three-tower process. In this process, product hydrogen is usually used as regeneration gas to realize hydrogen drying and drying agent regeneration through switching between towers.

[0003] Wind and light power generation has intermittent characteristics, which makes the hydrogen production capacity unstable. When the production capacity changes, the electrolytic cell load fluctuates greatly. In the drying link of hydrogen purification, the gas demand of the drying system is directly related to the hydrogen production capacity, and the intermittent change of the production capacity leads to unstable hydrogen flow entering the drying system.

[0004] Under low load conditions of the device, the hydrogen production is low. At this time, only a small amount of hydrogen from the first dryer goes to the next dryer, or even directly to the filter without passing through the remaining two dryers. This is because the existing drying system is not effectively designed for the case of insufficient gas under low load conditions, and lacks a mechanism to maintain stable gas flow distribution. This phenomenon causes hydrogen to be unable to fully contact the drying agent in the drying tower, affecting the hydrogen purification effect and reducing the working efficiency of the drying system, making it difficult to meet the high-quality application requirements of the final output hydrogen, and limiting the promotion and application of wind and light hydrogen production.

[0005] When dealing with low load conditions, the traditional three-tower drying process often needs to restart the compressor to increase the hydrogen flow to ensure drying effect. However, the starting energy consumption of the compressor is huge, and frequent starting not only increases production cost, but also shortens the service life of the compressor and increases equipment maintenance cost.

[0006] At the same time, due to the unstable hydrogen flow under low load conditions, the regeneration gas flow is difficult to maintain stable. Under the action of unstable regeneration gas flow, the drying agent cannot be completely regenerated, leading to accelerated performance decline of the drying agent and increased replacement frequency. This not only increases the cost of consumables, but also requires frequent shutdown and replacement of the drying agent, affecting production continuity and reducing overall production efficiency.

[0007] The present utility model aims to solve the problems of hydrogen purification system drying efficiency, energy consumption and drying agent life under low load conditions by innovatively designing the structure and control strategy of the drying system, and to realize efficient and stable operation of the hydrogen purification system in the wind and light hydrogen production scenario. UTILITY MODEL CONTENTS

[0008] The utility model discloses a hydrogen drying device of novel electrolytic cell purification system, which overcomes the defects in the prior art.

[0009] To achieve the above object, the technical scheme of the utility model is as follows:

[0010] A hydrogen drying device of novel electrolytic cell purification system, which overcomes the defects in the prior art.

[0011] Further, the outer circulation process is provided with a power equipment, which provides a medium circulation driving force for the improved process route.

[0012] Further, the power equipment includes a circulating fan, and the product hydrogen delivery pipeline end is provided with a hydrogen buffer tank.

[0013] Further, the drying tower equipment is provided with a running monitoring equipment, which includes a pressure distribution monitor, a desiccant saturation monitor and a humidity sensor, and is electrically connected with a data processing platform.

[0014] Further, the pressure distribution monitor includes pressure sensors arranged at different height positions in the drying tower equipment; and the desiccant saturation monitor includes a near-infrared spectrum sensor.

[0015] Further, the drying tower equipment is provided with a multi-stage shunt flow equalization device, which includes multi-stage shunt plates, flow guide components and support structures, and the shunt plates and flow guide components are fixed in the drying tower equipment in a specific distribution form through the support structures.

[0016] Further, the multi-stage shunt plates are provided with multiple layers in the height direction of the drying tower equipment, each layer of the multi-stage shunt plates is preset as a concentric ring or radial shunt component, and the radial shunt components between adjacent layers are arranged in a staggered manner; the shunt components are provided with shunt holes, the shunt holes gradually decrease in diameter and gradually increase in number from outside to inside;

[0017] The flow guide components include flow guide vanes or flow guide cones, which are arranged between the layers of the multi-stage shunt plates for adjusting the flow direction of hydrogen.

[0018] A control method of a hydrogen drying device of a novel electrolytic cell purification system, comprising the hydrogen purification drying system, which comprises a low load working condition control step:

[0019] S1: real-time working condition monitoring, the system continuously monitors the hydrogen flow data entering the drying system, and determines that the system enters a low load working condition when the flow is lower than the set threshold, triggering a low load control process;

[0020] S2: low load working condition control process, after confirming the low load working condition, automatically start the circulating fan on the external circulation process, drive part of the dried hydrogen from the product hydrogen delivery pipeline to flow back to the adjacent two drying tower devices on the upstream process route, and establish a modified process route;

[0021] S3: PID dynamic adjustment of fan speed, the PID controller adjusts the circulating fan speed in real time according to the pressure distribution monitor (different height pressure sensor data) in the drying tower, the drying agent saturation monitor (near-infrared spectrum sensor data) and the humidity sensor data, and maintains the total gas amount through the drying tower constant;

[0022] S4: operation parameter optimization, the running monitoring equipment collects the data in the drying tower in real time and transmits them to the data processing platform;

[0023] The data processing platform uses a neural network algorithm analysis model to comprehensively process the data, predicts the remaining service life of the drying agent, and plans the replacement or regeneration operation in advance; according to the hydrogen humidity, the working time and temperature parameters of the drying tower are adjusted, and the system operation is optimized.

[0024] Further, a normal load working condition control step is included:

[0025] S21: the system monitors that the hydrogen flow returns to the normal range;

[0026] S22: stop the circulating fan operation and close the modified process route;

[0027] S23: switch the hydrogen to the original basic process route for purification, and the system operates according to the conventional parameters.

[0028] The advantages and beneficial effects of the utility model are:

[0029] 1. The circulating fan maintains the minimum working gas amount of the drying tower at low load, avoiding the short circuit phenomenon. Only a small power fan is needed to realize circulation, which is much lower than the energy consumption of restarting the compressor, thereby achieving energy saving and consumption reduction. Stable regeneration gas flow can completely regenerate the drying agent and reduce the replacement frequency. The original drying tower structure does not need to be modified, only a bypass circulation system needs to be added, only modular modification is needed, and the process modification adaptability is strong.

[0030] 2. By combining the basic process route with the improved process route, starting the circulating fan at low load to make part of the dried hydrogen backflow, maintaining the minimum working gas flow of the drying tower, avoiding the short circuit phenomenon caused by insufficient hydrogen flow, ensuring the full contact of the drying agent and hydrogen in the drying tower, effectively improving the hydrogen purification effect, and ensuring the stable and qualified product hydrogen quality. At the same time, the real-time feedback data of the running monitoring equipment in the drying tower are combined with intelligent algorithm to optimize the system parameters, and the drying efficiency and purification quality are further enhanced.

[0031] 3. A variety of running monitoring equipment are arranged in the drying tower, connected with a data processing platform, advanced technologies such as neural network algorithm are used for deep analysis of multi-dimensional parameters, system abnormalities such as drying agent failure and uneven air flow distribution can be predicted in advance, and system running parameters can be adjusted in time. At the same time, according to the real-time working condition, the low load and normal load control processes are automatically switched, the intelligent and self-adaptive operation of the system is realized, the manual intervention is reduced, and the management efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a flow process schematic diagram of the hydrogen drying device of the electrolytic cell purification system in the embodiment one of the utility model;

[0033] Figure 2 is a flow process schematic diagram of the embodiment two in the utility model;

[0034] Figure 3 is a flow process schematic diagram of the embodiment three in the utility model;

[0035] Figure 4 is a flow process schematic diagram of the drying system of the hydrogen purification under the low load working condition of the utility model;

[0036] Figure 5 is a structure schematic diagram of the inside of the drying tower equipment in the utility model;

[0037] Figure 6 is a structure schematic diagram of the inside of the drying tower equipment in the utility model; Figure 5 A-A section in the utility model;

[0038] In the drawing: 1, drying tower equipment; 2, basic process route; 3, hydrogen sending pipeline; 4, improved process route; 5, outer circulation process; 6, starting point end; 7, terminal end; 8, common process; 9, power equipment; 10, pressure distribution monitor; 11, drying agent saturation monitor; 12, humidity sensor; 13, multi-stage shunt flow device; 14, multi-stage shunt plate; 15, flow guide component; 16, radial shunt component; 17, shunt hole; 18, support structure; 19, air flow distributor; 20, low load cross line; 21, hydrogen buffer tank. DETAILED DESCRIPTION

[0039] The specific embodiments of the utility model are further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot be used to limit the protection scope of the utility model.

[0040] As Figures 1-4 shown, a plurality of drying tower devices 1 are connected through process pipelines, so that the hydrogen produced by electrolytic hydrogen production is sequentially passed through drying towers and other devices, thereby performing drying operation on the hydrogen product. The following describes a mature three-tower process. It can be understood that the number of drying towers is not limited and can be increased or decreased as needed. In one cycle of the existing three drying towers, each drying tower sequentially experiences working, regeneration, and adsorption. The problem is that under low load of the device, the hydrogen production is low, and only a small amount of hydrogen from the first dryer goes to the next dryer, or even does not pass through the remaining two dryers and goes directly to the filter, affecting the hydrogen purification effect and the working efficiency of the drying system. Therefore, a new type of electrolytic cell purification system hydrogen drying device is needed to cope with the situation that the drying tower can still operate normally under low load of the system, so as to overcome the problem of frequent start-stop switching of the drying tower caused by fluctuation of hydrogen production.

[0041] Example 1

[0042] A new type of electrolytic cell purification system hydrogen drying device, comprising a drying tower group composed of a plurality of drying tower devices 1, and a basic process route 2 connecting between the drying tower group, and the end of the basic process route 2 being a product hydrogen delivery pipeline 3; as Figure 1 shown, in the process of the present embodiment, the basic process route 2 includes entering the first drying tower after deoxidizing treatment from the deoxidizer, then using a serial route, i.e. sequentially passing through the second drying tower, the third drying tower, and then being delivered to the user unit from the hydrogen delivery pipeline 3, so that the effect of multi-stage drying is formed, and the present basic process route 2 has good effect on drying the product hydrogen;

[0043] When the device is under low load, the hydrogen flow is insufficient, resulting in that part of the hydrogen is directly short-circuited to the filter without fully participating in the adsorption process of the subsequent drying tower, and the regeneration gas amount is insufficient, the drying agent is not fully regenerated, and the system efficiency continues to deteriorate.

[0044] In the present embodiment, in order to overcome the problem, specifically, an improved process route 4 for low load conditions is provided, as Figure 1As shown, the improved process route 4 includes an external circulation process 5, the starting end 6 of which is connected with the product hydrogen delivery pipeline 3, and the ending end 7 is connected before a certain dry tower device 1 on the upstream side of the basic process route 2. It can be understood that the position connected by the ending end 7 is not limited by the drawing, which is connected between the first and second dry tower devices 1 in the drawing, and of course can be connected between the second and third dry towers, and with the increase of the number of dry tower devices 1, more connection positions (not shown in the drawing) can also be increased, so that the process between the starting end 6 and the ending end 7 on the basic process route 2 becomes the shared process 8 of the improved process route 4 and the basic process route 2, and the improved process route 4 establishes a low working condition circulation between the shared process 8 and the external circulation process 5. And it can be understood that multiple pipelines can be provided between these connection positions, and when multiple pipelines are provided, these pipelines are in parallel structure, and corresponding regulating valves can be provided to remotely control the external circulation process 5 to cut into a certain dry tower device 1, thereby forming a selectable enhanced circulation amount for some downstream dry tower devices 1, thereby avoiding frequent start and stop of the dry tower device 1.

[0045] Further, the external circulation process 5 is provided with a power device 9, which provides a medium circulation driving force for the improved process route 4; in this embodiment, the circulating fan is exemplarily used as the power device, specifically, the circulating fan is arranged on the external circulation process 5, the circulating fan power is adjustable (0.5-5 kW), and the flow range is 10-500 m³ / h. The fan inlet is provided with a pressure sensor (accuracy ±0.1 kPa) to monitor the buffer tank pressure in real time to prevent negative pressure from causing gas backflow. A flow regulating valve and a check valve are also provided to prevent gas backflow, so that the starting end 6 and the ending end 7 of the external circulation pipeline are connected with the pipeline of the original basic process route 2 through a three-way valve, so that the direction of hydrogen can be controlled and adjusted.

[0046] In actual use, a flow sensor is arranged on the basic process route 2, and when it is detected that the flow is lower than the set threshold value (which can be 30% of the flow), the fan is automatically started to return part of the dried hydrogen to the front end of the system, and the fan speed is dynamically adjusted by the PID controller to maintain the total gas amount constant. After the system recovers to normal load, the fan is automatically stopped and switched to the original process path.

[0047] Thus, the problem of aggravated insufficient drying caused by reduced hydrogen flow during low load of the system is solved, thereby greatly saving cost, and the minimum working gas amount of the drying tower is ensured by forced circulation to ensure hydrogen purity and drying agent regeneration effect.

[0048] Embodiment two:

[0049] In the same embodiment as example one, also take three tower process as an example, the difference is that, in this embodiment, between the second and third drying tower equipment 1, a low load cross line 20 is arranged in parallel with it; it can be understood that the hydrogen after drying through the first drying tower can be selected by the opening of the valve or the opening size of the valve, and the flow direction of the hydrogen is controlled, or the matching flow of hydrogen entering two parallel pipelines respectively; for example, when the system load decreases and the hydrogen decreases, the system pressure drop before and after the hydrogen through the three drying tower equipment 1 appears, even the short circuit phenomenon; at this time, the low load cross line 20 arranged in parallel can be adjusted by adjusting the valve, so that part or all of the hydrogen bypasses the second and third drying towers, so that the system can still normally produce hydrogen when the load is low.

[0050] In order to avoid the short circuit phenomenon caused by the small amount of hydrogen when the system load is low, this embodiment can also be set as example one, and the external circulation process 5 is set as shown in Figure 2 The setting form can be consistent with example one, and in actual production control, this embodiment sets adjusting valves on the serial pipeline and the low load cross line 20, and adjusts the opening of the flow control valve, and can set PID adjusting control between the power of the circulating fan, so that the hydrogen in the system can be controlled according to the operation of the process personnel, and the predetermined equipment can be flowed into, and the controllability is improved.

[0051] Example three:

[0052] The difference between this embodiment and the foregoing embodiments is that each drying tower equipment 1 in this embodiment is arranged in parallel and controllable, and control valves are arranged at the front and rear ends of each drying tower equipment 1. Similarly, take a three-tower system as an example, as shown in Figure 3 In this embodiment, the starting end 6 of the external circulation process 5 is still connected to the hydrogen delivery pipeline 3, and the terminal end 7 of each drying tower equipment 1 is provided with a plurality of parallel branches. Take a three-tower system as an example, three parallel external circulation terminal ends 7 are arranged in parallel, and in this embodiment, the external circulation process 5 is also arranged, and a circulating fan is arranged on the external circulation process 5. In this way, the low load production in the parallel multi-tower system can be coped with, and the working capacity of the drying tower is ensured by the circulating fan for one or more towers or some towers, and the hydrogen purity and the drying agent regeneration effect are ensured.

[0053] Example four:

[0054] This embodiment is based on the foregoing examples one to three, and a hydrogen buffer tank 21 is additionally arranged, specifically as shown in Figure 4As shown, the outlet end of the product hydrogen delivery pipeline is connected to the hydrogen buffer tank 21 through a pipeline. The provision of the hydrogen buffer tank 21 can further maintain the pressure stability of the system, thereby reducing fluctuations in the subsequent system caused by hydrogen pressure fluctuations. In the embodiment shown in the accompanying drawings, the inlet of the hydrogen buffer tank 21 is connected to the hydrogen delivery pipeline 3, and the outlet of the hydrogen buffer tank 21 is the starting point 6 of the external circulation process 5.

[0055] Furthermore, the drying tower is filled with molecular sieve or silica gel adsorbent, and in order to achieve uniform airflow distribution in the tower and prevent flow deviation, an airflow distributor 19 is added inside the drying tower. Specifically, the airflow distributor 19 can adopt a perforated plate structure to allow hydrogen to pass through the adsorption bed in the drying tower uniformly, thereby improving the adsorption efficiency to more than 90%. In addition, an explosion-proof centrifugal fan made of low-carbon stainless steel such as 316L stainless steel is used to resist hydrogen embrittlement.

[0056] Example Five

[0057] As a further improvement of Example Four, this embodiment optimizes the airflow uniformity performance inside the drying tower equipment 1 by adding a multi-stage shunt flow uniformity device 13 inside the drying tower equipment 1. The device adopts a perforated plate structure design, which specifically includes a multi-stage shunt plate 14, a flow guide component 15, and a support structure 18. The shunt plate and the flow guide component 15 are fixed inside the drying tower equipment 1 in a specific distribution form through the support structure 18.

[0058] The multi-stage shunt plate 14 is composed of multiple layers of radial shunt components 16 and support structures 18 in a panel structure. Depending on actual process requirements, 1-5 layers can be flexibly arranged from bottom to top inside the drying tower. Each layer of radial shunt components 16 is designed in a concentric ring or radial structure. Taking the concentric ring distribution as an example, each layer of radial shunt components is composed of multiple concentric ring plates, and shunt holes 17 are uniformly arranged on the concentric ring plates. Through a large number of experiments, it has been verified that when the diameters of the shunt holes 17 decrease by 0.5-1.5 mm and the number of the shunt holes increases by 1.2-1.5 times from outside to inside, the airflow uniformity improvement effect is best. The radial shunt components 16 between adjacent layers are arranged in a staggered manner. This layout can change the direction and speed of the hydrogen flow when it passes through different levels of shunt plates, thereby further enhancing the dispersion effect of the gas.

[0059] In actual application, through computational fluid dynamics (CFD) simulation analysis, it is found that the airflow velocity difference in different areas of the drying tower can reach 40%-60% without the multi-stage shunt flow uniformity device 13, and the airflow velocity difference is reduced to 10%-15% after installation, significantly improving the airflow uniformity.

[0060] Meanwhile, flow guiding components 15 can be selectively installed according to specific operating conditions. These components are installed between the layers of the multi-stage flow divider 14 to adjust the direction of hydrogen flow. The flow guiding components 15 include both guide vanes and guide cones, which can be used individually or in combination as needed. Their quantity, position, and installation angle are all flexibly adjustable, and they are precisely positioned within the drying tower via the support structure 18. For example, in conditions involving large gas volumes, the number of guide vanes can be increased and their installation angle adjusted to 30°-45°, causing the hydrogen to flow in a spiral pattern within the drying tower, further promoting uniform gas distribution.

[0061] Example 6

[0062] like Figure 1 As shown, the drying tower equipment 1 is equipped with operation monitoring equipment, which consists of a pressure distribution monitor 10, a desiccant saturation monitor 11, and a humidity sensor 12. All operation monitoring equipment is electrically connected to the data processing platform through data transmission lines. The data processing platform has a built-in PID controller, which adjusts the speed of the circulating fan in real time by receiving multi-source monitoring data to maintain a constant total gas volume in the drying tower.

[0063] The pressure distribution monitor 10 consists of four pressure sensors positioned at 20%, 40%, 60%, and 80% of the axial height of the drying tower (simplified in the diagram). When the pressure deviation in a certain area exceeds a set threshold (e.g., ±5 kPa), the PID controller prioritizes adjusting the fan speed. For example, under low-load conditions, if the top pressure sensor data shows a sudden pressure drop, the PID controller increases the proportional coefficient Kp by 1.2-1.5 times, rapidly increasing the fan speed to restore the pressure in that area to the normal range within 30 seconds, thus preventing a decrease in drying efficiency due to insufficient airflow.

[0064] The desiccant saturation monitor 11 uses a near-infrared spectral sensor with a monitoring accuracy of ±3% and a response time of <2 seconds. When the desiccant saturation exceeds the warning value (e.g., 80%), the PID controller dynamically adjusts the fan speed based on data from the humidity sensor 12. Experimental data shows that when the humidity is 50 ppm and the saturation reaches 80%, increasing the integral coefficient Ki by 0.8-1.0 times can increase the circulating air volume by 15%-20%, enhance the regeneration effect, and reduce the desiccant saturation to below the safe threshold within 2 hours.

[0065] The humidity sensor 12 has a measurement range of 0-100ppm and an accuracy of ±1ppm. When the hydrogen humidity exceeds the target value (e.g., 10ppm), the PID controller activates the differential adjustment function, adjusting the fan speed according to the rate of humidity change. For example, when the humidity increases at a rate of 2ppm / min, the differential coefficient Kd automatically increases by 0.5-0.8 times, anticipating the gas demand and ensuring that the humidity stabilizes below 8ppm within 40 minutes.

[0066] Through actual working condition test, the PID controller combined with multi-source data adjustment, the total gas fluctuation range of the drying tower is controlled within ±5%, compared with the traditional single flow control mode, the hydrogen purification efficiency is improved, the service life of the drying agent is prolonged by about 30%, and the stable operation of the system under low load working condition is effectively ensured.

[0067] A control method of a hydrogen drying device of a new electrolytic cell purification system, comprising the above-mentioned hydrogen purification drying system, the hydrogen purification drying system control method under low load working condition

[0068] The control method is based on a hydrogen purification drying system comprising a pressure distribution monitor 10, a drying agent saturation monitor 11, a humidity sensor 12 and a PID controller, which realizes accurate control under low load and normal load working conditions, and the specific steps are as follows:

[0069] S1: Real-time working condition monitoring

[0070] The system continuously monitors the hydrogen flow data entering the drying system through a high-precision flow sensor at a frequency of 10 times per second, and dynamically compares the real-time flow with the set threshold value (30% of the flow). Once the real-time flow is continuously lower than the 30% threshold value for 10 seconds, it is determined that the system enters low load working condition, and immediately triggers the low load control process and sends a low load warning signal to the operator.

[0071] S2: Low load working condition control process

[0072] After confirming the entry into low load working condition, the system automatically starts the explosion-proof circulating fan on the outer circulation process 5 within 0.5 seconds, the rated power of the fan is 5kW, and the maximum flow can reach 500m³ / h. After the circulating fan is started, part of the dried hydrogen is driven from the product hydrogen delivery pipeline 3 to flow back to the adjacent two drying tower equipment 1 between the upstream of the basic process route 2, to establish the improved process route 4, and the corresponding pneumatic valve (response time <1s) is opened at the same time, to ensure smooth gas flow passage.

[0073] S3: PID dynamic adjustment of fan speed

[0074] The PID controller adjusts the circulating fan speed in real time according to multi-source monitoring data to maintain the total gas quantity of the drying tower constant:

[0075] Pressure distribution adjustment: The pressure distribution monitor 10 is composed of 4 high-precision pressure sensors (accuracy ±0.5 kPa) arranged at 20%, 40%, 60%, and 80% of the height of the drying tower. When the pressure deviation in a certain area exceeds the set threshold (such as ±5 kPa), the PID controller adjusts the fan speed first. If the top pressure sensor data shows a sudden drop in pressure, the PID controller increases the proportional coefficient Kp by 1.2-1.5 times, starts the fan to restore the pressure in that area to the normal range within 30 seconds.

[0076] Desiccant saturation adjustment: The desiccant saturation monitor 11 uses a near-infrared spectrum sensor with a monitoring accuracy of ±3% and a response time of <2 seconds. When the desiccant saturation exceeds the warning value (such as 80%) and the humidity sensor 12 data shows that the humidity is around 50 ppm, the PID controller increases the integral coefficient Ki by 0.8-1.0 times, increases the circulating gas volume by 15%-20% within 5 minutes, and strengthens the regeneration effect to reduce the desiccant saturation to below 70% within 2 hours.

[0077] Humidity adjustment: The humidity sensor 12 measures in the range of 0-100 ppm with an accuracy of ±1 ppm. When the hydrogen humidity exceeds the target value (such as 10 ppm) and rises at a rate of 2 ppm / min, the PID controller activates the differential adjustment function, automatically increases the differential coefficient Kd by 0.5-0.8 times, and predicts the gas demand in advance to stabilize the humidity to below 8 ppm within 40 minutes.

[0078] S4: Operation parameter optimization

[0079] The monitoring equipment collects real-time data such as pressure, desiccant saturation, and humidity in the drying tower at a frequency of 1 second and transmits them to the data processing platform. The data processing platform uses a trained neural network algorithm analysis model to comprehensively process the data:

[0080] Desiccant life prediction: By analyzing the desiccant saturation trend and historical data, the remaining service life of the desiccant is predicted, and a 72-hour advance replacement or regeneration prompt is sent to the operator.

[0081] Drying tower parameter adjustment: According to the hydrogen humidity data, automatically adjust the drying tower working time and temperature parameters to optimize system operation.

[0082] Normal load condition control steps

[0083] S21: Condition determination

[0084] The system continuously monitors the hydrogen flow, and when the real-time flow stabilizes in the normal range (more than 80% of the set threshold) for 15 seconds continuously, it is determined that the system has returned to normal load conditions.

[0085] S22: Close the modified process route 4

[0086] After confirming the normal load condition, the system stops the operation of the circulating fan within 1 second, closes the pneumatic valve related to the external circulation process 5, and cuts off the power supply of the circulating fan to prevent accidental start.

[0087] S23: Restore normal operation

[0088] The hydrogen is switched to the original basic process route 2 for purification, and the system operates according to the normal parameters. At this time, the working time and temperature of the drying tower and other parameters are restored to the preset standard values, and each monitoring device continues to monitor the system operation state in real time to ensure stable operation of the system.

[0089] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A novel hydrogen drying device for a purification system of an electrolyzer cell, comprising a drying tower group composed of a plurality of drying tower devices, characterized in that, The dry tower group is connected by a basic process route, and the end of the basic process route is a product hydrogen delivery pipeline; the improved process route used under low load conditions is also included, the improved process route includes an external circulation process, the starting end of the external circulation process is connected with the product hydrogen delivery pipeline, and the terminal end is connected before a certain dry tower device on the upstream side of the basic process route, so that the process flow between the starting end and the terminal end on the basic process route becomes a shared flow of the improved process route and the basic process route, and the improved process route establishes a low-condition circulation between the shared flow and the external circulation flow.

2. A novel hydrogen drying device for a purification system of an electrolyzer according to claim 1, characterized in that, A power device is arranged on the external circulation flow, and the power device provides a medium circulation driving force for the improved process route.

3. A novel hydrogen drying device for a purification system of an electrolyzer according to claim 2, characterized in that, The power device includes a circulating fan, and the product hydrogen delivery pipeline end is provided with a hydrogen buffer tank.

4. A novel hydrogen drying device for electrolyzer purification system according to claim 1, characterized in that, An operation monitoring device is arranged in the dry tower device, and the operation monitoring device includes a pressure distribution monitor, a desiccant saturation monitor, and a humidity sensor, and the operation monitoring device is electrically connected with a data processing platform.

5. A novel hydrogen drying device for a purification system of an electrolyzer according to claim 4, characterized in that, The pressure distribution monitor includes pressure sensors arranged at different height positions in the dry tower device; the desiccant saturation monitor includes a near-infrared spectrum sensor.

6. A novel hydrogen drying device for electrolyzer purification system according to claim 1, characterized in that, A multi-stage shunt flow equalization device is arranged in the dry tower device, which includes multi-stage shunt plates, flow guide components, and support structures, and the shunt plates and flow guide components are fixed in the dry tower device in a specific distribution form through the support structures.

7. A novel electrolyzer purification system hydrogen drying device according to claim 6, characterized in that, The multi-stage shunt plates are provided with multiple layers in the height direction of the dry tower device, each layer of the multi-stage shunt plates is pre-set as a concentric ring or radial shunt component, and the radial shunt components between adjacent layers are arranged in a staggered manner; radial shunt components are provided with shunt holes, the shunt holes gradually decrease in diameter from outside to inside and gradually increase in number; The flow guide components include flow guide blades or flow guide cones, which are arranged between the layers of the multi-stage shunt plates for adjusting the flow direction of hydrogen.

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