A skid-mounted pressure reducing device for integrated high-pressure steam

Abstract

This utility model discloses an integrated skid-mounted pressure reducing device for high-pressure steam, relating to the field of pressure reducing devices for high-pressure steam. Existing high-pressure steam pressure reducing devices suffer from problems such as difficult condensate disposal, low energy utilization, and low integration. This device includes an inlet section assembly, a pressure reducing and regulating section assembly, an outlet section assembly, a dual condensate drainage system, and a safety protection system, arranged sequentially along the steam flow path. The system is integrated and installed on a skid-mounted base. It achieves precise condensate drainage through the dual condensate drainage assembly, closed-loop control through a pneumatic regulating valve, and optimized flow field through a gradual pipeline design. It also features dual N3 outlets for N3 steam diversion. This solves the problems of corrosion and low efficiency of traditional devices, achieving rapid installation, precise pressure reduction, high efficiency and energy saving, improving system stability and adaptability, and is suitable for steam demand in various industrial scenarios.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing devices for high-pressure steam, and more particularly to an integrated skid-mounted pressure reducing device for high-pressure steam. Background Technology

[0002] In industrial production, high-pressure steam, as a highly efficient heat energy carrier, is widely used in the heat supply stages of many industries such as chemical, power, and metallurgy. Its pressure parameters need to be precisely controlled according to the specific requirements of different production equipment or processes; therefore, pressure reducing devices become the key hub connecting the high-pressure steam source and the end-use energy equipment.

[0003] Current mainstream high-pressure steam pressure reduction schemes generally rely on a single pressure regulating valve as the core component, achieving pressure attenuation through dynamic adjustment of the valve core opening. However, in actual operation, these traditional devices have revealed a series of unavoidable technical defects:

[0004] First, the challenge of condensate disposal is particularly prominent. During the decompression process of high-pressure steam, the sudden pressure drop causes a change in the thermodynamic state, inevitably resulting in the generation of a large amount of condensate. Existing equipment mostly uses a single hydrophobic path or a simple drainage structure, which is insufficient to cope with the intermittent, high-flow-rate condensate discharge requirements. Condensate that is not discharged in time forms a liquid accumulation in the pipeline, causing steam to carry liquid water and impact valves and pipe interfaces, triggering a "water hammer effect," resulting in wear of seals and pipeline vibration. Furthermore, the temperature gradient between the condensate and the high-temperature steam accelerates the electrochemical corrosion of metal pipelines; according to industrial statistics, this type of corrosion can shorten equipment lifespan by 30%-50%. Simultaneously, the accumulated liquid reduces the effective cross-sectional area for steam flow, leading to decreased heat exchange efficiency and significant energy waste.

[0005] Secondly, the lack of an energy recovery mechanism restricts the improvement of system energy efficiency. The thermal energy contained in high-pressure steam includes both sensible heat and latent heat. Traditional pressure-reducing devices only focus on the control of pressure parameters and do not utilize the energy released during the pressure reduction process in a cascade manner. When steam is reduced from ultra-high pressure (e.g., above 10 MPa) to medium-low pressure (e.g., 1-2 MPa), a large amount of heat energy is dissipated during the conversion of pressure potential energy into kinetic energy, and the thermal energy utilization rate of some devices is even less than 60%. In addition, the steam parameters after pressure reduction fluctuate greatly, and the lack of effective closed-loop control means leads to unstable operation of downstream energy-consuming equipment, further aggravating energy waste.

[0006] Furthermore, low system integration increases the barrier to industrial application. Existing pressure reducing devices often have valves, instruments, and drainage components installed in a decentralized manner, requiring on-site pipe welding, circuit connections, and debugging. This not only prolongs the construction period but also may lead to leakage risks due to insufficient installation accuracy. At the same time, the decentralized structure results in a large footprint, making it less suitable for space-constrained industrial scenarios and hindering subsequent maintenance and management.

[0007] Therefore, developing a high-pressure steam decompression device that combines efficient condensate removal, improved energy utilization, and integrated design is key to solving the current pain points in the industry. Utility Model Content

[0008] The technical problem to be solved and the technical task proposed by this utility model is to improve and refine the existing technical solutions, and to provide a high-pressure steam integrated skid-mounted pressure reducing device, in order to solve the problems of equipment corrosion and reduced thermal efficiency caused by condensate retention in the pressure reducing device. To this end, this utility model adopts the following technical solution.

[0009] A high-pressure steam integrated skid-mounted pressure reducing device includes an inlet section assembly, a pressure reducing and regulating section assembly, an outlet section assembly, a dual condensate drainage system, and a safety protection system arranged sequentially along the steam flow path. The inlet section assembly includes a first gate valve, a filter, a first pressure gauge, a first bimetallic thermometer, and a pressure transmitter arranged sequentially along the steam flow path on the pipeline, and has an N1 steam inlet. The pressure reducing and regulating section assembly includes a second gate valve, a pneumatic regulating valve system, and a third gate valve arranged sequentially along the steam flow path on the pipeline. The outlet section assembly includes a second pressure gauge, an integrated temperature and pressure transmitter, a second bimetallic thermometer, and a fourth gate valve arranged sequentially along the steam flow path on the pipeline, and has an N3 steam outlet. The dual condensate drainage system includes an N2 condensate drainage component with an N2 condensate outlet located upstream of the pneumatic regulating valve system and an N4 condensate drainage component with an N4 condensate outlet located downstream of the pneumatic regulating valve system. The safety protection system includes a spring safety valve located upstream of the outlet section assembly. All components are integrated and connected to the same skid-mounted base via prefabricated pipes and supports. By integrating the inlet section assembly, pressure reduction and control section assembly, outlet section assembly, dual condensate drainage system, and safety protection system onto a single skid-mounted base, the complex on-site construction and long cycle time caused by the dispersed installation of existing equipment are solved, achieving modular production and rapid installation. Simultaneously, by setting up an N1 steam inlet, an N3 steam outlet, and N2 and N4 condensate drainage components with N2 and N4 condensate drainage ports, a complete steam treatment process is constructed. The dual condensate drainage system can specifically discharge condensate before and after pressure reduction, effectively solving the equipment corrosion and reduced thermal efficiency problems caused by condensate retention in existing technologies. The collaborative work of each component improves the thermal energy utilization efficiency of steam, avoids the significant heat loss defects of existing equipment, and meets the high-efficiency, safe, and stable requirements for high-pressure steam pressure reduction treatment in industrial production.

[0010] As a preferred technical means, the N2 condensate trap includes a first shut-off valve, a first drain valve, and a second shut-off valve connected in sequence. The inlet end of the N2 condensate trap is connected to the pipeline between the pressure transmitter and the second gate valve. The N2 condensate trap is connected between the pressure transmitter and the second gate valve through a specific pipeline, which can accurately discharge condensate generated by temperature changes before the high-pressure steam enters the pressure reducing control section. This prevents condensate from entering the regulating valve system with the steam and affecting the pressure reducing accuracy, while also reducing corrosion of the pipeline by condensate and extending the service life of the equipment.

[0011] As a preferred technical means, the N4 condensate trap includes a fourth shut-off valve, a second condensate trap, and a fifth shut-off valve connected in sequence. The inlet end of the N4 condensate trap is connected to the pipeline between the third gate valve and the spring safety valve. The N4 condensate trap is connected between the third gate valve and the spring safety valve and is specifically designed to discharge condensate formed when the steam temperature drops after pressure reduction, ensuring the dryness of the steam entering the outlet section, reducing the thermal efficiency loss of downstream equipment due to water operation, and ensuring the stable operation of downstream energy-consuming equipment.

[0012] As a preferred technical means, the pneumatic regulating valve system includes a valve body, an actuator, and a positioner, wherein the positioner is connected to an integrated temperature and pressure transmitter. The pneumatic regulating valve system, through the linkage between the positioner and the integrated temperature and pressure transmitter, achieves closed-loop control of the pressure reduction process. It adjusts the valve opening in real time according to the outlet steam parameters, ensuring stable steam pressure and temperature after pressure reduction, meeting the precise steam parameter requirements of different downstream equipment, and reducing energy waste.

[0013] As a preferred technical approach, the diameter of the inlet section assembly pipe is larger than that of the pressure-reducing and regulating section assembly pipe, and a smooth transition conical pipe structure is adopted at the connection point. By optimizing the gradual design of the pipe diameter and employing a high-precision pneumatic regulating valve system, the steam maintains a stable flow velocity and uniform flow field distribution during the pressure reduction process, while reducing turbulence and energy loss, increasing flow velocity, and achieving efficient transfer of steam kinetic energy, thereby reducing heat loss and improving the overall thermal energy utilization rate.

[0014] As a preferred technical means: the filter uses a 316L stainless steel filter screen, and the lower end of the filter has a normally closed interface as a backwashing interface. The 316L stainless steel filter screen has excellent corrosion resistance and filtration accuracy, which can effectively intercept solid impurities in steam, protect downstream precision components from wear, and the backwashing interface at the lower end of the filter can clean the filter screen without stopping the machine, maintain filtration efficiency, and extend the filter screen replacement cycle.

[0015] As a preferred technical means, both the first and second steam traps are inverted barrel-type steam traps. Inverted barrel-type steam traps feature large drainage capacity and strong resistance to water hammer, enabling rapid discharge of condensate from the N2 and N4 drain ports. They are also less prone to clogging due to impurities, and their stable drainage performance ensures the efficient operation of the dual-drainage system, further enhancing the device's condensate treatment capacity.

[0016] As a preferred technical approach: the outlet section component has two N3 steam outlets at its outlet end, the diameter of which is equal to the diameter of the main pipeline of the outlet section, and each N3 steam outlet is equipped with a fourth gate valve. The design of the two N3 steam outlets having the same diameter as the main pipeline of the outlet section enables bidirectional steam diversion, meeting the simultaneous steam demand of multiple branches. The fourth gate valve at each outlet can independently control the on / off state of the branch, facilitating individual adjustment of the steam flow rate of each branch, and improving the adaptability of the device to complex industrial steam usage scenarios.

[0017] As a preferred technical approach: the skid-mounted base adopts a channel steel structure base. The bottom of the skid-mounted base is equipped with anti-vibration pads and positioning pin holes. Connecting plates are provided on the inner sides of the four corners of the skid-mounted base, and anchor bolt holes are provided on the connecting plates. The channel steel structure skid-mounted base has high strength and good stability, capable of withstanding the overall weight of the device and the vibration load during operation. The anti-vibration pads reduce the vibration impact of equipment operation on the foundation, and the positioning pin holes and anchor bolt holes ensure the accuracy and firmness of the device installation, providing structural protection for the long-term stable operation of the device.

[0018] Beneficial effects:

[0019] 1. By combining the dual hydrophobic design of the N2 and N4 hydrophobic components with the efficient drainage capacity of the inverted bucket steam trap, the problems of equipment and pipe corrosion, water hammer effect and reduced thermal efficiency caused by condensate retention in traditional devices are solved, thereby improving the service life of the overall system and ensuring long-term stable operation of the system.

[0020] 2. The pneumatic regulating valve system and the integrated temperature and pressure transmitter form a closed-loop control, which adjusts the valve opening in real time according to the outlet steam parameters to keep the steam pressure and temperature stable after pressure reduction, meet the precise requirements of different downstream equipment for steam parameters, effectively control the steam pressure fluctuation after pressure reduction, improve the pressure reduction accuracy, and reduce energy waste.

[0021] 3. By optimizing the gradual design of the pipe diameter and adopting a high-precision pneumatic regulating valve system, the steam maintains a stable flow rate and uniform flow field distribution during the decompression process. At the same time, it reduces turbulence and energy loss, increases flow rate, and realizes efficient transfer of steam kinetic energy, thereby reducing heat loss and improving the overall thermal energy utilization rate.

[0022] 4. The spring safety valve can quickly release pressure when the system is overpressured. Together with the pressure gauges and thermometers at the inlet and outlet, it forms a real-time monitoring system, which builds a full-process safety protection system and solves the problem of lack of active safety control in traditional devices. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0024] Figure 2 This is a top view of the structure of this utility model.

[0025] In the diagram: 1. First gate valve; 2. Filter; 3. First pressure gauge; 4. First bimetallic thermometer; 5. Pressure transmitter; 6. Second gate valve; 7. Pneumatic control valve system; 8. Third gate valve; 9. Fifth gate valve; 10. Third shut-off valve; 11. First shut-off valve; 12. First steam trap; 13. Second shut-off valve; 14. Spring safety valve; 15. Sixth shut-off valve; 16. Fourth shut-off valve; 17. Second steam trap; 18. Fifth shut-off valve; 19. Second pressure gauge; 20. Integrated temperature and pressure transmitter; 21. Second bimetallic thermometer; 22. Fourth gate valve; 23. Skid-mounted base; 2301. Connecting plate; 24. N1 steam inlet; 25. N3 steam outlet; 26. N2 steam trap; 27. N4 steam trap. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figure 1 , 2 As shown, a high-pressure steam integrated skid-mounted pressure reducing device includes a skid-mounted base 23, and an inlet section assembly, a pressure reducing and regulating section assembly, an outlet section assembly, a dual hydrophobic system, and a safety protection system arranged sequentially along the steam flow path. The inlet section assembly includes a first gate valve 1, a filter 2, a first pressure gauge 3, a first bimetallic thermometer 4, and a pressure transmitter 5, arranged sequentially along the steam flow path on the pipeline. The inlet section assembly has an N1 steam inlet 24. The pressure reducing and regulating section assembly includes a second gate valve 6, a pneumatic regulating valve system 7, and a third gate valve 8, arranged sequentially along the steam flow path on the pipeline. The outlet section assembly includes a second pressure gauge 19, an integrated temperature and pressure transmitter 20, a second bimetallic thermometer 21, and a fourth gate valve 22, arranged sequentially along the steam flow path on the pipeline. The outlet section assembly has an N3 steam outlet 25. The dual condensate system includes an N2 condensate assembly with an N2 condensate outlet 26 located upstream of the pneumatic regulating valve system 7 and an N4 condensate assembly with an N4 condensate outlet 27 located downstream of the pneumatic regulating valve system 7. The safety protection system includes a spring safety valve 14 located upstream of the outlet section assembly. The pressure threshold of the spring safety valve 14 is set to 1.1 times the rated steam pressure of the outlet section. All components are integrated and fixed on the same skid-mounted base 23 through prefabricated pipes and supports.

[0029] To discharge condensate generated by temperature changes before high-pressure steam enters the pressure-reducing control section, the N2 condensate trap includes a first shut-off valve 11, a first drain valve 12, and a second shut-off valve 13 connected in sequence. The inlet of the N2 condensate trap is connected to the pipeline between the pressure transmitter 5 and the second gate valve 6. The N2 condensate trap, connected to the pressure transmitter 5 and the second gate valve 6 via a specific pipeline, can accurately discharge condensate generated by temperature changes before high-pressure steam enters the pressure-reducing control section, preventing condensate from entering the regulating valve system with the steam and affecting the pressure-reducing accuracy. It also reduces corrosion of the pipeline by condensate, extending the service life of the equipment.

[0030] To discharge the condensate formed by the decrease in steam temperature after pressure reduction, the N4 condensate trap includes a fourth shut-off valve 16, a second condensate trap 17, and a fifth shut-off valve 18 connected in sequence. The inlet of the N4 condensate trap is connected to the pipeline between the third gate valve 8 and the spring safety valve 14. The N4 condensate trap, connected between the third gate valve 8 and the spring safety valve 14, is specifically designed to discharge the condensate formed by the decrease in steam temperature after pressure reduction, ensuring the dryness of the steam entering the outlet section, reducing thermal efficiency loss in downstream equipment due to water accumulation, and ensuring the stable operation of downstream energy-consuming equipment.

[0031] To achieve closed-loop control of the pressure reduction process, the pneumatic control valve system 7 includes a valve body, an actuator, and a positioner. The positioner is connected to the integrated temperature and pressure transmitter 20. The pneumatic control valve system 7, through the linkage between the positioner and the integrated temperature and pressure transmitter 20, uses a PID algorithm to adjust the valve opening, controlling the steam pressure fluctuation range after pressure reduction to ≤±0.05MPa. This achieves closed-loop control of the pressure reduction process, adjusting the valve opening in real time according to the outlet steam parameters to maintain stable steam pressure and temperature after pressure reduction, meeting the precise requirements of different downstream equipment for steam parameters and reducing energy waste.

[0032] To achieve efficient transfer of steam kinetic energy, the pipe diameter of the inlet section assembly is larger than that of the pressure reducing and regulating section assembly. In this embodiment, the pipe diameter gradually changes from DN100 to DN80, with a smooth transition conical pipe structure at the connection point. By optimizing the gradual change in pipe diameter and employing a high-precision pneumatic regulating valve system 7, the steam maintains a stable flow velocity and uniform flow field distribution during pressure reduction, while reducing turbulence and energy loss and increasing flow velocity. Experiments show that after pressure reduction, the steam flow velocity significantly increases, achieving efficient transfer of steam kinetic energy, thereby reducing heat loss and improving overall thermal energy utilization.

[0033] To protect downstream precision components from wear, filter 2 uses a 316L stainless steel filter screen, and its lower end has a normally closed interface for backwashing. The 316L stainless steel filter screen has excellent corrosion resistance and filtration accuracy, effectively intercepting solid impurities in steam and protecting downstream precision components from wear. The backwashing interface at the lower end of filter 2 allows for cleaning of the filter screen without shutting down the system, maintaining filtration efficiency and extending the filter screen replacement cycle.

[0034] To quickly drain the condensate from the N2 and N4 drain ports 27, both the first drain valve 12 and the second drain valve 17 are inverted bucket-type drain valves, with a drainage capacity of 1.5 times the maximum condensate generation. The inverted bucket-type drain valve features large drainage capacity and strong resistance to water hammer, enabling rapid drainage of condensate from the N2 and N4 drain ports 27. It is also less prone to clogging due to impurities, and its stable drainage performance ensures the efficient operation of the dual drain system, further enhancing the device's condensate handling capacity.

[0035] To ensure long-term stable operation and ease of maintenance, the main pipeline system, consisting of the inlet section assembly, pressure reducing and regulating section assembly, outlet section assembly, and safety protection system, is arranged on the same plane 0.6 meters above the skid-mounted base 23. The pipeline systems for the N2 and N4 condensate assemblies are arranged on a plane 155 mm above the skid-mounted base 23, with both systems connected vertically from the main pipeline system. This optimized spatial layout facilitates future maintenance and management. The skid-mounted base 23 uses a channel steel structure base, with anti-vibration pads and positioning pin holes at the bottom. Connecting plates 2301 are located on the inner sides of the four corners of the skid-mounted base 23, with anchor bolt holes on the connecting plates 2301. The channel steel skid-mounted base 23 has high strength and good stability, and can withstand the overall weight of the device and the vibration load during operation. The anti-vibration pad reduces the vibration impact of equipment operation on the foundation. The positioning pin holes and anchor bolt holes ensure the accuracy and firmness of the device installation, providing structural protection for the long-term stable operation of the device.

[0036] During operation, high-pressure steam first enters the unit through the N1 steam inlet of the inlet section assembly, and then flows sequentially through the first gate valve 1 and filter 2. Filter 2 intercepts solid impurities in the steam, preventing wear on precision components such as the downstream pneumatic regulating valve system 7. If the filter screen needs cleaning and maintenance, it can be done through the normally closed backwash port at the lower end.

[0037] After filtration, the steam continues to flow through the first pressure gauge 3, the first bimetallic thermometer 4, and the pressure transmitter 5. These instruments monitor the pressure and temperature parameters of the steam in real time, providing data reference for subsequent control. Afterward, the steam passes through the inlet of the N2 condensate trap, where condensate generated by temperature changes before the steam enters the pressure-reducing control section is promptly discharged.

[0038] Subsequently, steam enters the pressure-reducing and regulating section assembly through the second gate valve 6, and the core pneumatic regulating valve system 7 begins to operate. Its positioner is connected to the integrated temperature and pressure transmitter 20 at the outlet section, and the valve opening is adjusted using a PID algorithm to control the steam pressure fluctuation after pressure reduction within the range of ≤±0.05MPa. Simultaneously, the pipe diameter from the inlet section to the pressure-reducing and regulating section gradually changes from DN100 to DN80, and the transition section uses a smooth conical pipe structure to reduce turbulence losses, increase steam velocity, and achieve efficient kinetic energy transfer.

[0039] After the pressure is reduced, the steam flows out through the third gate valve 8 and passes through the inlet of the N4 condensate condensate assembly. The N4 condensate condensate assembly will discharge the condensate formed due to the temperature drop after pressure reduction.

[0040] Next, the steam flows through the spring safety valve 14 and then into the outlet section assembly, passing sequentially through the second pressure gauge 19, the integrated temperature and pressure transmitter 20, and the second bimetallic thermometer 21. These instruments perform secondary monitoring of the steam parameters to ensure that downstream requirements are met. Finally, the steam is discharged through the N3 steam outlet equipped with the fourth gate valve 22 and delivered to downstream energy-consuming equipment.

[0041] Throughout the process, all components are integrated on the skid-mounted base 23 of the channel steel structure. The anti-vibration pads of the base reduce the impact of operating vibration, and the positioning pin holes and anchor bolt holes ensure that the device is installed firmly. In addition, the main pipeline system and the drainage component pipeline system are placed at different heights, which facilitates inspection and maintenance, and realizes efficient, safe and stable treatment of high-pressure steam from entry to exit.

[0042] This device integrates the inlet section assembly, pressure reduction and control section assembly, outlet section assembly, dual condensate drainage system, and safety protection system onto a single skid-mounted base 23. This solves the problems of complex on-site construction and long cycles caused by the dispersed installation of existing devices, and realizes modular production and rapid installation. The dual condensate drainage system can specifically drain the condensate before and after pressure reduction, effectively solving the problems of equipment corrosion and reduced thermal efficiency caused by condensate retention in existing technologies. The coordinated work of each component improves the thermal energy utilization efficiency of steam, avoids the defects of large thermal energy loss in existing devices, and meets the high-efficiency, safe, and stable requirements of high-pressure steam pressure reduction treatment in industrial production.

[0043] Example 2

[0044] Unlike Embodiment 1 above, the outlet section assembly has two N3 steam outlets 25, the diameter of which is equal to the diameter of the main pipeline of the outlet section. Each N3 steam outlet is equipped with a fourth gate valve 22. This design, with the two N3 steam outlets having the same diameter as the main pipeline of the outlet section, enables bidirectional steam diversion, meeting the simultaneous steam demand of multiple branches. The fourth gate valve 22 at each outlet can independently control the on / off state of the branch, facilitating individual adjustment of the steam flow rate of each branch and improving the adaptability of the device to complex industrial steam usage scenarios.

[0045] Example 3

[0046] Unlike embodiments one or two above, the N2 condensate trap assembly has a parallel pipeline with a third shut-off valve 10. If the first condensate trap 12 needs maintenance, this parallel pipeline with the third shut-off valve 10 can be opened to ensure uninterrupted condensation. The N4 condensate trap assembly has a parallel pipeline with a sixth shut-off valve 15. If the second condensate trap 17 needs maintenance, this parallel pipeline with the sixth shut-off valve 15 can be opened to maintain condensation. The pressure reducing and regulating section assembly has a parallel pipeline with a fifth gate valve 9. If the pressure reducing and regulating section needs maintenance, this parallel pipeline with the fifth gate valve 9 can be opened to ensure uninterrupted steam delivery. The parallel pipelines of the N2 and N4 condensate trap assemblies and the parallel pipelines of the pressure reducing and regulating section form a triple maintenance bypass. When the condensate traps or pressure reducing and regulating section assemblies need maintenance, the bypass can be opened through the corresponding shut-off valve or gate valve to ensure uninterrupted steam delivery and condensation, improving the continuous operation capability and maintenance convenience of the device.

[0047] The above-described integrated high-pressure steam skid-mounted pressure reducing device is a specific embodiment of this utility model, demonstrating its substantial features and advancements. Based on actual usage needs, equivalent modifications in shape, structure, etc., can be made to it under the guidance of this utility model, all of which are within the scope of protection of this solution.

Claims

1. A skid-mounted pressure reducing device for integrated high-pressure steam, characterized in that: The system includes an inlet section assembly, a pressure reducing and regulating section assembly, an outlet section assembly, a dual condensate drainage system, and a safety protection system, arranged sequentially along the steam flow path. The inlet section assembly includes a first gate valve, a filter, a first pressure gauge, a first bimetallic thermometer, and a pressure transmitter, all arranged sequentially along the steam flow path. The inlet section assembly has an N1 steam inlet. The pressure reducing and regulating section assembly includes a second gate valve, a pneumatic regulating valve system, and a third gate valve, all arranged sequentially along the steam flow path. The outlet section assembly includes a second pressure gauge, an integrated temperature and pressure transmitter, a second bimetallic thermometer, and a fourth gate valve, all arranged sequentially along the steam flow path. The outlet section assembly has an N3 steam outlet. The dual condensate drainage system includes an N2 condensate drainage assembly with an N2 condensate outlet located upstream of the pneumatic regulating valve system and an N4 condensate drainage assembly with an N4 condensate outlet located downstream of the pneumatic regulating valve system. The safety protection system includes a spring safety valve located upstream of the outlet section assembly. All components are integrated and connected to the same skid-mounted base via prefabricated pipes and supports.

2. The integrated high-pressure steam skid-mounted pressure reducing device according to claim 1, characterized in that: The N2 condensate drain assembly includes a first shut-off valve, a first drain valve, and a second shut-off valve connected in sequence. The inlet end of the N2 condensate drain assembly is connected to the pipeline between the pressure transmitter and the second gate valve.

3. The integrated high-pressure steam skid-mounted pressure reducing device according to claim 2, characterized in that: The N4 condensate drain assembly includes a fourth shut-off valve, a second condensate drain valve, and a fifth shut-off valve connected in sequence. The inlet end of the N4 condensate drain assembly is connected to the pipeline between the third gate valve and the spring safety valve.

4. The integrated high-pressure steam skid-mounted pressure reducing device according to claim 3, characterized in that: The N2 condensate drain assembly is equipped with a parallel pipeline with a third shut-off valve; the N4 condensate drain assembly is equipped with a parallel pipeline with a sixth shut-off valve; and the pressure reducing and regulating section assembly is equipped with a parallel pipeline with a fifth gate valve.

5. The integrated skid-mounted pressure reducing device for high-pressure steam as described in claim 1, characterized in that: The pneumatic control valve system includes a valve body, an actuator, and a positioner, wherein the positioner is connected to an integrated temperature and pressure transmitter.

6. The integrated high-pressure steam skid-mounted pressure reducing device according to claim 1, characterized in that: The diameter of the inlet section assembly pipe is larger than that of the pressure reducing and regulating section assembly pipe, and the connection transition adopts a smooth transition conical pipe structure.

7. The integrated high-pressure steam skid-mounted pressure reducing device according to claim 1, characterized in that: The filter uses a 316L stainless steel filter screen, and the lower end of the filter has a normally closed interface as a backwashing interface.

8. The integrated high-pressure steam skid-mounted pressure reducing device according to claim 3, characterized in that: Both the first and second steam traps are inverted bucket-type steam traps.

9. A high-pressure steam integrated skid-mounted pressure reducing device according to claim 1, characterized in that: The outlet section assembly has two N3 steam outlets at its outlet end. The diameter of each N3 steam outlet is equal to the diameter of the main pipeline of the outlet section, and each N3 steam outlet is equipped with a fourth gate valve.

10. A high-pressure steam integrated skid-mounted pressure reducing device according to claim 1, characterized in that: The skid-mounted base adopts a channel steel steel structure base. The bottom of the skid-mounted base is equipped with anti-vibration pads and positioning pin holes. The inner sides of the four corners of the skid-mounted base are equipped with connecting plates, and the connecting plates are equipped with anchor bolt holes.

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