Gas-liquid separation and cooling integrated system and efficient operation method thereof

Abstract

The invention relates to the technical field of hydrogen production, in particular to a gas-liquid separation and cooling integrated system and an efficient operation method thereof. Comprising a multi-stage spiral-flow type gas-liquid separator, a flow guide blade set and a centrifugal separation cavity are arranged in the separator, the flow guide blade set is spirally distributed in the axial direction, and a hydrophilic coating is arranged on the inner wall of the centrifugal separation cavity; the nested double-circulation cooling module comprises an inner circulation refrigerant channel and an outer circulation cooling water jacket, the inner circulation refrigerant channel is communicated with the air outlet of the centrifugal separation cavity, and the outer circulation cooling water jacket is arranged around the inner circulation refrigerant channel; and the intelligent regulation and control unit is electrically connected with a driving motor of the guide vane set, a flow control valve of the inner circulation refrigerant channel and a temperature sensor of the outer circulation cooling water jacket. The intelligent regulation and control unit can effectively solve the problems that equipment is dispersed in structure and poor in collaboration, and operation parameters cannot be dynamically adapted.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and in particular to a gas-liquid separation and cooling integrated system and an efficient operation method thereof. Background Art

[0002] In the field of hydrogen production technology, gas-liquid separation and cooling processes are key links in ensuring hydrogen quality and stable system operation. The gas-liquid separation and cooling devices in existing hydrogen production systems mostly adopt a split structure, in which the gas-liquid separator and cooling equipment are arranged independently, and the gas-liquid processing process is realized through pipeline connection. This design has significant disadvantages: on the one hand, the split structure leads to a dispersed system layout, which increases the equipment footprint and installation complexity, and the pipeline connection is prone to leakage risks, affecting the sealing of the system; on the other hand, the independently operated separation and cooling equipment lack effective coordination, and it is difficult to dynamically adjust the operating parameters according to the hydrogen production conditions. When the gas flow, temperature or composition fluctuates, the separation efficiency and cooling effect drop significantly, resulting in a large amount of water remaining in the hydrogen, which cannot meet the stringent requirements of subsequent processes for hydrogen purity and temperature, and seriously restricts the overall efficiency and stability of the hydrogen production system.

[0003] Based on the above problems, there is an urgent need for an integrated and intelligent gas-liquid separation and cooling technology solution that can effectively solve the problems of dispersed equipment structure, poor coordination, and inability to dynamically adapt operating parameters, thereby improving the operating efficiency and reliability of the hydrogen production system. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a gas-liquid separation and cooling integrated system, comprising: A multi-stage cyclone gas-liquid separator, wherein a guide blade group and a centrifugal separation chamber are provided inside the separator, the guide blade group is distributed in a spiral shape along the axial direction, and the inner wall of the centrifugal separation chamber is provided with a hydrophilic coating; A nested dual-circulation cooling module, the cooling module comprising an inner circulation refrigerant channel and an outer circulation cooling water jacket, the inner circulation refrigerant channel being in communication with the air outlet of the centrifugal separation chamber, the outer circulation cooling water jacket being arranged around the inner circulation refrigerant channel; An intelligent control unit is electrically connected to the drive motor of the guide vane group, the flow control valve of the internal circulation refrigerant channel, and the temperature sensor of the external circulation cooling water jacket. The control unit dynamically adjusts the rotation speed of the guide vane group, the flow rate of the internal circulation refrigerant, and the temperature of the external circulation cooling water based on real-time monitoring data.

[0005] Preferably, the multi-stage cyclone gas-liquid separator includes at least three separation structures, the spiral angle of the guide blade group of each separation structure increases by 5°-15° successively, and a gas-liquid buffer chamber is provided between two adjacent separation structures, and a liquid level control valve is provided at the bottom of the gas-liquid buffer chamber.

[0006] Preferably, the inner circulation refrigerant channel of the nested dual-circulation cooling module adopts a microchannel array structure, the cross-sectional shape of the microchannel is an inverted triangle, the inner wall of the microchannel is treated with a super-air-philic interface, the water inlet of the outer circulation cooling water jacket is arranged at the downstream end of the inner circulation refrigerant channel, and the water outlet of the outer circulation cooling water jacket is arranged at the upstream end of the inner circulation refrigerant channel.

[0007] Preferably, the intelligent control unit includes: a data acquisition module, the module being electrically connected to a pressure sensor provided in the centrifugal separation chamber, a temperature sensor of the inner circulation refrigerant channel, and a flow sensor of the outer circulation cooling water jacket; A prediction model module, which predicts the gas phase temperature distribution of the centrifugal separation chamber and the heat exchange efficiency of the internal circulation refrigerant channel based on the real-time data obtained by the data acquisition module through a temporal convolutional network, a bidirectional gated recurrent unit, and an attention mechanism model; An optimization control module, which uses the NSGA-II algorithm to perform multi-objective optimization on the rotation speed of the guide vane group, the flow rate of the internal circulation refrigerant, and the temperature of the external circulation cooling water according to the output results of the prediction model module.

[0008] Preferably, the separation efficiency of the multi-stage cyclone gas-liquid separator is Satisfies the following formula: ; in, For the The helical angle correction coefficient of the guide vane group of the stage separation structure, is the gas phase density, For the The gas phase flow rate of the stage separation structure, For the The radius of the centrifugal separation chamber of the stage separation structure, is the gas phase dynamic viscosity, For the The gas-liquid interfacial tension correction coefficient of the stage separation structure, is the gas-liquid interfacial tension, is the pressure difference between the inlet and outlet of the centrifugal separation chamber.

[0009] Preferably, the energy consumption of the nested double-circulation cooling module is Satisfies the following formula: ; in, For the The heat transfer coefficient of the refrigerant circulation channel within the segment, For the The heat exchange of the refrigerant circulation channel within the segment, For the The inlet and outlet temperature difference of the circulating refrigerant channel within the segment, For the The flow resistance coefficient of the outer circulation cooling water jacket, For the Water flow of the outer circulation cooling water jacket, is the specific heat capacity of water at constant pressure, For the The inlet and outlet temperature difference of the outer circulation cooling water jacket, For cooling time.

[0010] Preferably, the dynamic adjustment parameters of the intelligent control unit are Satisfies the following formula: ; in, For the The weight coefficient of each temperature monitoring point, For the The temperature change rate of each temperature monitoring point, For the The weight coefficient of each flow rate monitoring point, For the The flow rate change rate of each flow monitoring point.

[0011] Preferably, the guide vane group of the multi-stage cyclone gas-liquid separator is made of shape memory alloy material, the spiral angle of the guide vane group can be adaptively adjusted within the range of 20°-60°, and the phase change temperature of the shape memory alloy material is 30°C-50°C.

[0012] Preferably, a nanoporous heat-conducting layer is provided between the inner circulation refrigerant channel of the nested double-circulation cooling module and the outer circulation cooling water jacket, the porosity of the nanoporous heat-conducting layer is 60%-80%, and the thermal conductivity coefficient of the nanoporous heat-conducting layer is 0.1W / (m·K)-0.5W / (m·K).

[0013] An efficient operation method, applied to a gas-liquid separation and cooling integrated system as described in any one of the above, is characterized by comprising the following steps: S1: A mixed gas containing hydrogen and water vapor is introduced into the multi-stage cyclone gas-liquid separator, and the guide blade group performs pre-separation at an initial rotation speed of 200 rpm to 500 rpm; S2: The intelligent control unit monitors the pressure and temperature of the centrifugal separation chamber and the flow rate and temperature of the internal circulation refrigerant channel in real time; S3: The prediction model module predicts the gas phase temperature distribution of the centrifugal separation chamber and the heat exchange efficiency of the internal circulation refrigerant channel based on the real-time monitoring data; S4: The optimization control module uses the NSGA-II algorithm to perform multi-objective optimization on the rotation speed of the guide vane group, the flow rate of the internal circulation refrigerant, and the temperature of the external circulation cooling water based on the prediction results, so as to improve the separation efficiency of the system by 15%-30% and reduce energy consumption by 10%-20%; S5: The hydrogen cooled by the nested double-circulation cooling module enters the subsequent drying process, and the outlet water of the external circulation cooling water jacket is cooled by the plate heat exchanger and then recycled.

[0014] Technical effects: The present invention solves the problems of equipment dispersion, poor coordination, and inability to dynamically adapt parameters in the background technology by integrating a multi-stage cyclone gas-liquid separator, a nested dual-circulation cooling module, and an intelligent control unit. The multi-stage cyclone gas-liquid separator uses centrifugal force and a hydrophilic coating to enhance separation, the nested dual-circulation cooling module improves heat exchange efficiency through a microchannel array, and the intelligent control unit dynamically optimizes operating parameters based on real-time monitoring data. The three work together to achieve a highly integrated and intelligent system, which not only reduces floor space and reduces leakage risks, but also accurately adapts to operating condition fluctuations, effectively improving hydrogen separation purity and cooling effects, and ensuring stable and efficient operation of the hydrogen production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a block diagram of the gas-liquid separation and cooling integrated system for this application; Figure 2 This is a flow chart of the efficient operation method for this application. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] See also Figure 1-Figure 2Traditional gas-liquid separation and cooling systems suffer from structural fragmentation, poor coordination, and the inability of parameters to dynamically adapt to operating conditions. The split design results in a large equipment footprint, complex installation, and leak risks associated with pipe connections. The gas-liquid separator and cooling equipment operate independently, making it difficult to coordinate adjustments based on fluctuations in gas flow, temperature, and composition during the hydrogen production process. This results in a high level of residual moisture in the hydrogen, making it impossible to meet the purity and temperature requirements of subsequent processes, severely impacting the overall efficiency and stability of the hydrogen production system.

[0018] Based on this, this embodiment provides an integrated gas-liquid separation and cooling system, including a multi-stage cyclone gas-liquid separator, a nested dual-circulation cooling module, and an intelligent control unit. A guide vane group and a centrifugal separation chamber are provided inside the multi-stage cyclone gas-liquid separator. The guide vane group is spirally distributed along the axial direction, and the inner wall of the centrifugal separation chamber is provided with a hydrophilic coating; the nested dual-circulation cooling module includes an inner circulation refrigerant channel and an outer circulation cooling water jacket. The inner circulation refrigerant channel is connected to the air outlet of the centrifugal separation chamber, and the outer circulation cooling water jacket surrounds the inner circulation refrigerant channel; the intelligent control unit is electrically connected to the drive motor of the guide vane group, the flow control valve of the inner circulation refrigerant channel, and the temperature sensor of the outer circulation cooling water jacket, and dynamically adjusts the operating parameters of each component based on real-time monitoring data.

[0019] This technical solution integrates gas-liquid separation and cooling functions through an integrated design, reducing equipment footprint and installation complexity, and minimizing the risk of pipeline leaks. The multi-stage cyclonic gas-liquid separator utilizes the centrifugal force generated by the guide vanes, combined with the adsorption of liquid droplets by a hydrophilic coating, to achieve efficient gas-liquid separation. The nested dual-circulation cooling module significantly improves heat exchange efficiency through the synergistic effect of internal and external circulation, coupled with a microchannel array structure. The intelligent control unit empowers the system with adaptive capabilities, precisely adjusting operating parameters based on changing operating conditions.

[0020] Its technical effects are remarkable. The integrated design makes the equipment structure more compact, and installation, commissioning and maintenance more convenient; multi-stage separation and efficient cooling ensure the stable and reliable quality of the output hydrogen, meeting the high standards of the hydrogen production process; intelligent control realizes automated operation, reduces manual intervention, improves the stability and reliability of system operation, and fundamentally solves the problems in traditional system structure and operation.

[0021] Traditional single-stage gas-liquid separators struggle to meet the separation efficiency requirements of complex operating conditions when handling the gas-liquid mixture generated during hydrogen production. Fluctuations in gas flow can lead to unstable separation performance, and large amounts of liquid can easily remain in the gas phase, impacting subsequent process flows. Furthermore, they lack the flexibility to adapt to the gas-liquid processing requirements of hydrogen production plants of varying scales, limiting overall system performance.

[0022] Based on this, this embodiment adopts at least three-stage separation structure for the multi-stage cyclone gas-liquid separator. The spiral angle of the guide blade group of each stage separation structure increases by 5°-15° successively. A gas-liquid buffer chamber is set between two adjacent stages of separation structures, and a liquid level control valve is provided at the bottom of the gas-liquid buffer chamber.

[0023] In this technical solution, the multi-stage separation structure enables the gas-liquid mixture to be separated step by step. By increasing the spiral angle, the centrifugal force is gradually enhanced for droplets of different sizes and densities, achieving more refined separation. The gas-liquid buffer chamber is used to store the separated liquid, preventing liquid accumulation from affecting the separation effect. The liquid level control valve automatically controls the discharge of liquid based on the buffer chamber liquid level, ensuring continuous and stable operation of the system. This design enables the separator to adapt to different flow conditions and maintain efficient separation in both low-load and high-load operation.

[0024] The technical effect is reflected in the significant improvement of the efficiency and quality of gas-liquid separation, the effective reduction of liquid content in the gas phase, and the reduction of the risk of subsequent process failures; the optimization of the flow state of gas and liquid in the separator, the prevention of gas short-circuiting and backflow, and the ensuring of a stable and reliable separation process; the realization of intelligent management of the separated liquid, the guarantee of continuous operation of the system, and the solution to the problem of insufficient performance of traditional single-stage separators under complex working conditions.

[0025] Traditional cooling modules have problems such as insufficient heat exchange area, high fluid flow resistance, and easy accumulation of condensate on the inner wall of the tube. These problems lead to low heat exchange efficiency and cannot meet the strict gas temperature requirements of the hydrogen production process. At the same time, they increase the energy consumption of system operation and make it difficult to achieve efficient and energy-saving cooling effects.

[0026] Based on this, this embodiment adopts a microchannel array structure for the inner circulation refrigerant channel of the nested dual-circulation cooling module. The cross-sectional shape of the microchannel is an inverted triangle, and the inner wall is treated with a super-air-philic interface; the water inlet of the outer circulation cooling water jacket is set at the downstream end of the inner circulation refrigerant channel, and the water outlet is set at the upstream end to form a reverse flow.

[0027] In this technical solution, the microchannel array structure significantly increases the heat exchange area and significantly improves heat exchange efficiency. The inverted triangular cross-section optimizes the fluid flow path, reduces flow resistance, and reduces refrigerant transport energy consumption. The super-aerophilic interface treatment effectively prevents droplet accumulation on the microchannel inner wall, ensuring efficient heat exchange. The reverse flow design of the external cooling water jacket increases the temperature difference between the cold and hot fluids, further enhancing the heat exchange effect and achieving rapid and sufficient cooling of the gas.

[0028] Its technical effects are to efficiently realize gas cooling, accurately control the temperature of the gas after cooling, and meet the strict temperature requirements of the hydrogen production process; reduce fluid flow resistance, reduce system operation energy consumption, and achieve energy-saving operation; avoid the problem of reduced heat exchange efficiency caused by liquid accumulation in microchannels, ensure the long-term stable and efficient operation of the cooling module, and provide reliable cooling guarantee for the hydrogen production process.

[0029] Traditional gas-liquid separation and cooling systems are mostly controlled by fixed parameters, which cannot respond to changes in operating conditions during the hydrogen production process in real time. When operating conditions fluctuate, the system separation efficiency decreases and energy consumption increases. It is also difficult to take into account multiple optimization goals at the same time, which seriously restricts the overall performance improvement of the system and cannot meet the complex needs of modern hydrogen production processes.

[0030] Based on this, the intelligent control unit includes a data acquisition module, a prediction model module, and an optimization control module. The data acquisition module is electrically connected to the pressure sensor installed in the centrifuge chamber, the temperature sensor of the internal refrigerant circulation channel, and the flow sensor of the external cooling water jacket. The prediction model module uses the temporal convolutional network-bidirectional gated recurrent unit-attention mechanism (TCN-BiGRU-Attention) model to predict the gas phase temperature distribution in the centrifuge chamber and the heat exchange efficiency of the internal refrigerant circulation channel based on the real-time data obtained by the data acquisition module. The optimization control module uses the NSGA-II algorithm to perform multi-objective optimization of the rotation speed of the guide vane group, the flow rate of the internal refrigerant circulation, and the temperature of the external cooling water circulation based on the output of the prediction model module.

[0031] This technical solution uses the data acquisition module to comprehensively obtain the system operating parameters, providing a data basis for precise control; the prediction model module uses advanced machine learning algorithms to predict the trend of working condition changes in advance; the optimization control module uses a multi-objective optimization algorithm to find the optimal balance between goals such as separation efficiency and energy consumption, dynamically adjust the system operating parameters, and realize real-time, precise, and intelligent control of the system, enabling the system to quickly adapt to complex and changing working conditions.

[0032] Its technical effect is to ensure the comprehensive and accurate collection of system operation data, providing a reliable basis for prediction and control; the high-precision prediction capability effectively avoids the problem of parameter regulation lag; multi-objective optimization achieves balanced optimization of separation efficiency and energy consumption, and improves the overall energy efficiency of the system; and gives the system adaptive capabilities, so that it can maintain stable and efficient operation under complex working conditions, solving the inherent defects of traditional control methods.

[0033] Traditional gas-liquid separation efficiency calculation methods are mostly targeted at single-stage separation structure design, and fail to fully consider the combined effects of key factors such as the spiral angle of the guide vane group, centrifugal force, and gas-liquid interfacial tension in multi-stage cyclone gas-liquid separators. This results in a large deviation between the calculated results and the actual separation efficiency, and cannot provide effective guidance for equipment design, operating parameter adjustment, and performance optimization.

[0034] Based on this, the separation efficiency of the multi-stage cyclone gas-liquid separator Satisfies the formula: ; in, For the The helical angle correction coefficient of the guide vane group of the stage separation structure, is the gas phase density, For the The gas phase flow rate of the stage separation structure, For the The radius of the centrifugal separation chamber of the stage separation structure, is the gas phase dynamic viscosity, For the The gas-liquid interfacial tension correction coefficient of the stage separation structure, is the gas-liquid interfacial tension, is the pressure difference between the inlet and outlet of the centrifugal separation chamber.

[0035] In the molecular part, The contribution of centrifugal force to the gas-liquid separation process is quantified. For the The helical angle correction coefficient of the guide vane group of the stage separation structure reflects the effect of the helical angle on the effect of centrifugal force. Different helical angles will change the rotation trajectory and centrifugal acceleration of the gas in the separator. It is obtained by fitting experimental or simulation data and is used to correct the difference between theoretical calculations and actual working conditions. It indicates the density of the gas phase. The higher the density, the greater the centrifugal force on the gas at the same flow rate and rotation radius, which helps to throw the relatively large density droplets to the inner wall of the separator to achieve separation. For the The gas phase flow rate of the stage separation structure and the square term of the flow rate reflect the significant influence of the flow rate on the centrifugal force. A higher flow rate can enhance the centrifugal separation effect, but it may also bring negative effects such as increased gas turbulence. It is The radius of the centrifugal separation chamber of the stage separation structure. The larger the radius, the greater the centrifugal force. However, an excessively large radius will increase the equipment volume and manufacturing cost. It is the dynamic viscosity of the gas phase. The higher the viscosity, the greater the gas flow resistance, which will weaken the centrifugal force's separation effect on the droplets.

[0036] Denominator The hindering effects of gas-liquid interfacial tension and pressure difference on the separation process are described. For the The gas-liquid interfacial tension correction coefficient of the stage separation structure is used to adjust the influence of gas-liquid interface characteristics on separation under different working conditions. It represents the gas-liquid interfacial tension, the size of which determines the ability of droplets to maintain agglomeration. The greater the interfacial tension, the more difficult it is for the droplets to break and separate. The pressure difference between the inlet and outlet of the centrifugal separation chamber provides the driving force for gas flow, but too large a pressure difference may lead to uneven distribution of gas flow rate, affecting the separation effect, while too small a pressure difference cannot effectively drive the gas to complete the separation process. This formula comprehensively considers the key physical quantities that affect the separation efficiency by comprehensively calculating the centrifugal force of each stage in the multi-stage separation structure with the gas-liquid interface and pressure-related obstacles. The comparative relationship between the numerator and denominator can accurately reflect the separation efficiency under different structural parameters and operating parameters in the multi-stage cyclone gas-liquid separator, providing a scientific quantitative basis for equipment design, parameter optimization and operation status evaluation.

[0037] This formula comprehensively integrates the core influencing factors of multi-stage separation structures. The numerator quantifies the centrifugal force, reflecting the contribution of centrifugal force at different stages to separation through parameters such as the helix angle correction factor, gas phase density, flow rate, radius, and dynamic viscosity. The denominator reflects the hindering effects of gas-liquid interfacial tension and pressure differential on the separation process. By comprehensively calculating these various factors in a multi-stage separation structure, separation efficiency can be accurately assessed and predicted.

[0038] The technical benefit is that it provides a scientific and accurate calculation basis for the design, development, structural optimization, and operating parameter adjustment of multi-stage cyclonic gas-liquid separators. During the design phase, the formula can be used to accurately estimate the separation efficiency under different parameter combinations and optimize the equipment structure. During operation, the operating status can be evaluated based on real-time parameter calculations, allowing timely parameter adjustments and reducing calculation errors, providing strong theoretical support for the development of gas-liquid separation technology.

[0039] Traditional cooling module energy consumption calculation methods often focus on a single cycle or partial energy consumption factors, and fail to fully consider the interrelationship between factors such as the heat conduction of the internal circulation refrigerant channel and the flow resistance of the external circulation cooling water jacket. As a result, the energy consumption calculation results deviate greatly from the actual energy consumption, and cannot provide effective guidance for the energy-saving design and operation optimization of the cooling module.

[0040] Based on this, the energy consumption of the nested double-loop cooling module Satisfies the formula: ; in, For the The heat transfer coefficient of the refrigerant circulation channel within the segment, For the The heat exchange of the refrigerant circulation channel within the segment, For the The inlet and outlet temperature difference of the refrigerant circulation channel within the segment, For the The flow resistance coefficient of the outer circulation cooling water jacket, For the The water flow of the outer circulation cooling water jacket, is the specific heat capacity of water at constant pressure, For the The inlet and outlet temperature difference of the outer circulation cooling water jacket, For cooling time.

[0041] In the molecular part, The contribution of centrifugal force to the gas-liquid separation process is quantified. For the The helical angle correction coefficient of the guide vane group of the stage separation structure reflects the effect of the helical angle on the effect of centrifugal force. Different helical angles will change the rotation trajectory and centrifugal acceleration of the gas in the separator. It is obtained by fitting experimental or simulation data and is used to correct the difference between theoretical calculations and actual working conditions. It indicates the density of the gas phase. The higher the density, the greater the centrifugal force on the gas at the same flow rate and rotation radius, which helps to throw the relatively large density droplets to the inner wall of the separator to achieve separation. For the The gas phase flow rate of the stage separation structure and the square term of the flow rate reflect the significant influence of the flow rate on the centrifugal force. A higher flow rate can enhance the centrifugal separation effect, but it may also bring negative effects such as increased gas turbulence. It is The radius of the centrifugal separation chamber of the stage separation structure. The larger the radius, the greater the centrifugal force. However, an excessively large radius will increase the equipment volume and manufacturing cost. It is the dynamic viscosity of the gas phase. The higher the viscosity, the greater the gas flow resistance, which will weaken the centrifugal force's separation effect on the droplets.

[0042] Denominator The hindering effects of gas-liquid interfacial tension and pressure difference on the separation process are described. For the The gas-liquid interfacial tension correction coefficient of the stage separation structure is used to adjust the influence of gas-liquid interface characteristics on separation under different working conditions. It represents the gas-liquid interfacial tension, the size of which determines the ability of droplets to maintain agglomeration. The greater the interfacial tension, the more difficult it is for the droplets to break and separate. The pressure difference between the inlet and outlet of the centrifugal separation chamber provides the driving force for gas flow, but too large a pressure difference may lead to uneven distribution of gas flow rate, affecting the separation effect, while too small a pressure difference cannot effectively drive the gas to complete the separation process. This formula comprehensively considers the key physical quantities that affect the separation efficiency by comprehensively calculating the centrifugal force of each stage in the multi-stage separation structure with the gas-liquid interface and pressure-related obstacles. The comparative relationship between the numerator and denominator can accurately reflect the separation efficiency under different structural parameters and operating parameters in the multi-stage cyclone gas-liquid separator, providing a scientific quantitative basis for equipment design, parameter optimization and operation status evaluation.

[0043] This formula integrates the internal heat conduction energy consumption with the external fluid flow energy consumption, comprehensively and accurately reflecting the total energy consumption of the cooling module. The first half calculates the energy consumption of the internal refrigerant channel, taking into account factors such as heat transfer coefficient, heat exchange, and temperature difference; the second half calculates the energy consumption of the external cooling water jacket, taking into account factors such as flow resistance coefficient, water flow rate, specific heat capacity, temperature difference, and cooling time.

[0044] Its technical benefit lies in providing a scientific method for energy consumption analysis and energy-saving optimization of nested dual-loop cooling modules. During the equipment design phase, a formula can be used to compare the energy consumption of different solutions and select the optimal design. During operation, real-time calculation and analysis of energy consumption percentages can be used to identify high-energy-consuming links and perform targeted optimizations, improving the accuracy of energy consumption calculations, helping to achieve energy-efficient operation of the cooling module and promoting the green development of hydrogen production processes.

[0045] The dynamic adjustment methods of traditional intelligent control units are mostly based on changes in a single parameter, and fail to comprehensively consider the impact of coordinated changes in multiple parameters such as temperature and flow rate on system operation, resulting in adjustment lag and inability to adapt to operating condition fluctuations in a timely manner, seriously affecting the overall performance and operational stability of the system, making it difficult to achieve accurate and efficient control.

[0046] Based on this, the dynamic adjustment parameters of the intelligent control unit Satisfies the formula: ; in, For the The weight coefficient of each temperature monitoring point, For the The temperature change rate of each temperature monitoring point, For the The weight coefficient of each flow rate monitoring point, For the The flow rate change rate of each flow monitoring point.

[0047] In the molecule It reflects the impact of system temperature changes on dynamic adjustment. For the The weight coefficient of each temperature monitoring point is determined by the temperature change at different locations in the gas-liquid separation and cooling system. The temperature change at different locations in the gas-liquid separation and cooling system has different effects on the overall operating status. For example, the temperature change near the outlet of the gas-liquid separator may have a greater impact on the subsequent cooling process. It is used to assign corresponding importance weights to different temperature monitoring points, and its value is determined through analysis of system operation characteristics and experimental verification. Indicates the The temperature change rate of each temperature monitoring point reflects the temperature change trend over time. The greater the temperature change rate, the more severe the system temperature fluctuation is, and the more significant the impact on the system operation status is. The weighted sum of the temperature change rates of each temperature monitoring point can comprehensively evaluate the temperature change of the entire system.

[0048] Denominator The effect of system flow rate changes on dynamic adjustment is quantified. For the The weight coefficient of each flow rate monitoring point is similar to temperature monitoring. The flow rate changes at different locations have different effects on system operation. The flow rate monitoring point is assigned corresponding weight according to its location and importance in the system. It is The velocity change rate of each velocity monitoring point reflects the dynamic change of the velocity over time. The velocity change rate reflects the degree of change in the flow state of the gas or liquid in the system. A large velocity change rate may lead to fluctuations in the gas-liquid separation effect or cooling efficiency. The weighted summation of the flow rate change rates of each flow rate monitoring point can comprehensively measure the overall change trend of the system flow rate. By using the ratio of the numerator to the denominator, a quantitative relationship between the system temperature change and the flow rate change is established. When the value changes, the intelligent control unit can determine the changing trend of the system's current operating status and dynamically adjust parameters such as the rotation speed of the guide vane group, the flow rate of the internal refrigerant loop, and the temperature of the external cooling water loop. This formula provides a scientific and quantitative basis for the intelligent control unit, enabling the system to quickly and accurately respond to changes in operating conditions, achieving intelligent and precise control of the gas-liquid separation and cooling processes, and ensuring the system maintains efficient and stable operation.

[0049] This formula comprehensively reflects changes in the system's operating status by integrating the rates of change of multiple temperature and flow rate monitoring points and introducing weighting coefficients. The numerator reflects the impact of temperature changes on dynamic adjustments, assessing the overall temperature variation of the system by weighted summation of the temperature change rates of multiple temperature monitoring points. The denominator quantifies the impact of flow rate changes, measuring the overall flow rate trend of the system by weighted summation of the flow rate change rates of multiple flow rate monitoring points. The ratio of the two provides a basis for precise adjustments by the intelligent control unit.

[0050] Its technical effect is that the intelligent control unit can keenly perceive the changes in the system working conditions and respond quickly. When the working conditions fluctuate, the dynamic adjustment parameters calculated according to the formula , comprehensively reflecting the coordinated changes in temperature and flow rate, the intelligent control unit adjusts the system operating parameters accordingly in a timely manner to ensure that the system quickly adapts to changes in working conditions, maintains efficient and stable operation, and improves the system's dynamic response capability and adaptability.

[0051] The fixed structure of the guide vanes in traditional gas-liquid separators prevents them from adaptively adjusting to changes in operating parameters such as gas flow and temperature during hydrogen production. This significantly reduces separation efficiency when operating conditions change, limiting the application and performance of gas-liquid separators and making it difficult to meet the diverse and complex demands of hydrogen production processes.

[0052] Based on this, the guide vane group of the multi-stage cyclone gas-liquid separator is made of shape memory alloy material. The spiral angle of the guide vane group can be adaptively adjusted within the range of 20°-60°, and the phase change temperature of the shape memory alloy material is 30℃-50℃.

[0053] This technical solution leverages the unique properties of shape memory alloys to automatically adjust the guide vane helical angle in response to temperature fluctuations. During hydrogen production, temperature changes under different operating conditions trigger alloy phase transitions, causing the vane angle to change accordingly, thereby regulating centrifugal force and optimizing gas-liquid separation. This adaptive adjustment requires no human intervention and responds to changing operating conditions in real time.

[0054] Its technical effect is to significantly improve the adaptive performance of the gas-liquid separator and reduce maintenance costs and frequency; ensure that the equipment can maintain high separation efficiency under different operating conditions, broaden the scope of applicable operating conditions; enhance the stability and reliability of system operation, reduce equipment failures caused by changes in operating conditions, provide more reliable protection for the gas-liquid separation link in the hydrogen production process, and effectively solve the limitations of the traditional fixed blade structure.

[0055] The heat conduction method between the inner and outer loops of the traditional nested dual-circulation cooling module is relatively simple, and there are problems such as large thermal resistance and low heat transfer efficiency, resulting in poor overall cooling effect, increased system energy consumption, and difficulty in meeting the strict requirements of the hydrogen production process for cooling efficiency and energy consumption control.

[0056] Based on this, a nanoporous thermal conductive layer is set between the inner circulation refrigerant channel and the outer circulation cooling water jacket of the nested dual-circulation cooling module. The porosity of the nanoporous thermal conductive layer is 60%-80%, and the thermal conductivity coefficient is 0.1W / (m·K)-0.5W / (m·K).

[0057] This technical solution leverages the unique structure and properties of the nanoporous thermal conductive layer to reduce thermal resistance and enhance heat transfer. The high-porosity structure increases the heat conduction path and contact area, optimizing heat transfer efficiency. The specific thermal conductivity range ensures efficient heat transfer while properly controlling the heat conduction rate, achieving efficient and stable heat transfer between the internal and external circuits.

[0058] Its technical effects are: greatly improving the thermal conduction efficiency of the cooling module, significantly enhancing the overall cooling effect, and being able to accurately control the gas cooling temperature to meet the requirements of the hydrogen production process; reducing energy loss during heat conduction, effectively reducing system operating energy consumption, and achieving energy-saving operation; ensuring stable and efficient operation of the cooling module, providing reliable cooling support for the hydrogen production process, and solving the problem of low thermal conduction efficiency of traditional cooling modules.

[0059] Traditional gas-liquid separation and cooling systems rely on manual experience, lack systematicity and scientificity, and suffer from lags in parameter adjustment, making efficient operation difficult. This results in inefficient gas-liquid handling, high energy consumption, and poor stability during hydrogen production, making it unable to meet the requirements of modern hydrogen production processes for efficient and stable operation.

[0060] Based on this, an efficient operation method based on the aforementioned gas-liquid separation and cooling integrated system includes the following steps: step S1, passing a mixed gas containing hydrogen and water vapor into a multi-stage cyclone gas-liquid separator, and the guide vane group performs pre-separation at an initial rotation speed of 200r / min-500r / min; step S2, the intelligent control unit monitors the pressure, temperature of the centrifugal separation chamber and the flow and temperature of the inner circulation refrigerant channel in real time; step S3, the prediction model module predicts the gas phase temperature distribution of the centrifugal separation chamber and the heat exchange efficiency of the inner circulation refrigerant channel based on real-time monitoring data; step S4, the optimization control module uses the NSGA-II algorithm to perform multi-objective optimization on the rotation speed of the guide vane group, the flow rate of the inner circulation refrigerant and the temperature of the outer circulation cooling water according to the prediction results; step S5, the hydrogen cooled by the nested double-circulation cooling module enters the subsequent drying process, and the outlet water of the outer circulation cooling water jacket is cooled by the plate heat exchanger and then recycled.

[0061] This method establishes a systematic and intelligent operational process, achieving efficient system operation through the coordinated cooperation of pre-separation, real-time monitoring, accurate prediction, intelligent optimization, and recycling. Pre-separation provides preliminary treatment of the gas-liquid mixture; real-time monitoring obtains system operating status data; accurate prediction and anticipation of operating condition changes; intelligent optimization dynamically adjusts parameters; and recycling achieves water conservation.

[0062] Its technical effects are reflected in the standardization of system operation procedures and the reduction of dependence on manual experience; real-time monitoring and accurate prediction ensure timely grasp of the system operation status; intelligent optimization realizes dynamic adjustment of system parameters, improves separation efficiency and cooling effect, and reduces energy consumption; recycles water resources, saves costs, and enhances system sustainability, providing an efficient, stable, and environmentally friendly operation solution for gas-liquid separation and cooling in the hydrogen production process, and solving many drawbacks of traditional operation methods.

[0063] The above are merely preferred embodiments of the present invention and do not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A gas-liquid separation and cooling integrated system, characterized in that: include: A multi-stage cyclone gas-liquid separator, wherein a guide blade group and a centrifugal separation chamber are provided inside the separator, the guide blade group is distributed in a spiral shape along the axial direction, and the inner wall of the centrifugal separation chamber is provided with a hydrophilic coating; A nested dual-circulation cooling module, the cooling module comprising an inner circulation refrigerant channel and an outer circulation cooling water jacket, the inner circulation refrigerant channel being in communication with the air outlet of the centrifugal separation chamber, the outer circulation cooling water jacket being arranged around the inner circulation refrigerant channel; An intelligent control unit is electrically connected to the drive motor of the guide vane group, the flow control valve of the internal circulation refrigerant channel, and the temperature sensor of the external circulation cooling water jacket. The control unit dynamically adjusts the rotation speed of the guide vane group, the flow rate of the internal circulation refrigerant, and the temperature of the external circulation cooling water based on real-time monitoring data.

2. The gas-liquid separation and cooling integrated system according to claim 1, characterized in that: The multi-stage cyclone gas-liquid separator includes at least three separation structures, the spiral angle of the guide blade group of each separation structure increases by 5°-15° successively, a gas-liquid buffer chamber is provided between two adjacent separation structures, and a liquid level control valve is provided at the bottom of the gas-liquid buffer chamber.

3. The gas-liquid separation and cooling integrated system according to claim 1, characterized in that: The inner circulation refrigerant channel of the nested dual-circulation cooling module adopts a microchannel array structure, the cross-sectional shape of the microchannel is an inverted triangle, the inner wall of the microchannel is treated with a super-aerophilic interface, the water inlet of the outer circulation cooling water jacket is arranged at the downstream end of the inner circulation refrigerant channel, and the water outlet of the outer circulation cooling water jacket is arranged at the upstream end of the inner circulation refrigerant channel.

4. The gas-liquid separation and cooling integrated system according to claim 1, characterized in that: The intelligent control unit includes: a data acquisition module, the module being electrically connected to a pressure sensor provided in the centrifugal separation chamber, a temperature sensor of the inner circulation refrigerant channel, and a flow sensor of the outer circulation cooling water jacket; A prediction model module, which predicts the gas phase temperature distribution of the centrifugal separation chamber and the heat exchange efficiency of the internal circulation refrigerant channel based on the real-time data obtained by the data acquisition module through a temporal convolutional network, a bidirectional gated recurrent unit, and an attention mechanism model; An optimization control module, which uses the NSGA-II algorithm to perform multi-objective optimization on the rotation speed of the guide vane group, the flow rate of the internal circulation refrigerant, and the temperature of the external circulation cooling water according to the output results of the prediction model module.

5. The gas-liquid separation and cooling integrated system according to claim 1, characterized in that: The separation efficiency η of the multi-stage cyclone gas-liquid separator satisfies the following formula: ； in, For the The helical angle correction coefficient of the guide vane group of the stage separation structure, is the gas phase density, For the The gas phase flow rate of the stage separation structure, For the The radius of the centrifugal separation chamber of the stage separation structure, is the gas phase dynamic viscosity, For the The gas-liquid interfacial tension correction coefficient of the stage separation structure, is the gas-liquid interfacial tension, is the pressure difference between the inlet and outlet of the centrifugal separation chamber.

6. The gas-liquid separation and cooling integrated system according to claim 1, characterized in that: Energy consumption of the nested double-loop cooling module Satisfies the following formula: ； in, For the The heat transfer coefficient of the refrigerant circulation channel within the segment, For the The heat exchange of the refrigerant circulation channel within the segment, For the The inlet and outlet temperature difference of the circulating refrigerant channel within the segment, For the The flow resistance coefficient of the outer circulation cooling water jacket, For the Water flow of the outer circulation cooling water jacket, is the specific heat capacity of water at constant pressure, For the The inlet and outlet temperature difference of the outer circulation cooling water jacket, For cooling time.

7. The gas-liquid separation and cooling integrated system according to claim 1, characterized in that: Dynamic adjustment parameters of the intelligent control unit Satisfies the following formula: ； in, For the The weight coefficient of each temperature monitoring point, For the The temperature change rate of each temperature monitoring point, For the The weight coefficient of each flow rate monitoring point, For the The flow rate change rate of each flow monitoring point.

8. The gas-liquid separation and cooling integrated system according to claim 1, characterized in that: The guide vane group of the multi-stage cyclone gas-liquid separator is made of shape memory alloy material. The spiral angle of the guide vane group can be adaptively adjusted within the range of 20°-60°. The phase change temperature of the shape memory alloy material is 30°C-50°C.

9. The gas-liquid separation and cooling integrated system according to claim 1, characterized in that: A nanoporous heat-conducting layer is provided between the inner circulation refrigerant channel of the nested double-circulation cooling module and the outer circulation cooling water jacket. The porosity of the nanoporous heat-conducting layer is 60%-80%, and the thermal conductivity coefficient of the nanoporous heat-conducting layer is 0.1W / (m·K)-0.5W / (m·K).

10. An efficient operation method, applied to a gas-liquid separation and cooling integrated system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: A mixed gas containing hydrogen and water vapor is introduced into the multi-stage cyclone gas-liquid separator, and the guide blade group performs pre-separation at an initial rotation speed of 200 rpm to 500 rpm; S2: The intelligent control unit monitors the pressure and temperature of the centrifugal separation chamber and the flow rate and temperature of the internal circulation refrigerant channel in real time; S3: The prediction model module predicts the gas phase temperature distribution of the centrifugal separation chamber and the heat exchange efficiency of the internal circulation refrigerant channel based on the real-time monitoring data; S4: The optimization control module uses the NSGA-II algorithm to perform multi-objective optimization on the rotation speed of the guide vane group, the flow rate of the internal circulation refrigerant, and the temperature of the external circulation cooling water based on the prediction results, so as to improve the separation efficiency of the system by 15%-30% and reduce energy consumption by 10%-20%; S5: The hydrogen cooled by the nested double-circulation cooling module enters the subsequent drying process, and the outlet water of the external circulation cooling water jacket is cooled by the plate heat exchanger and then recycled.

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