A multi-layered skid-mounted temperature and pressure reducing device

Abstract

This utility model discloses a multi-layer skid-mounted desuperheating and pressure reducing device, relating to the field of desuperheating and pressure reducing devices for high-temperature steam. Existing desuperheating and pressure reducing devices mostly adopt a decentralized layout, with steam pipelines, high-pressure boiler water pipelines, and auxiliary pipelines distributed haphazardly. This not only occupies a large amount of installation space but also causes mutual interference between pipelines, increasing maintenance difficulty. This utility model includes steam pipelines, high-pressure boiler water supply pipelines, and condensate discharge pipelines. The steam pipelines, arranged sequentially according to the steam flow direction, include a steam pressure reducing pipeline section, a steam desuperheating pipeline section, and a steam outlet pipeline section. The condensate discharge pipeline, steam pressure reducing pipeline section, high-pressure boiler water supply pipeline, and steam outlet pipeline section are arranged horizontally in layers at different heights from bottom to top on a skid-mounted base. By dividing the pipeline sections into multiple horizontal layers at different heights, a compact layout of the equipment is achieved, saving installation space. The layered design facilitates independent operation and maintenance of each pipeline and reduces mutual interference.

Description

Technical Field

[0001] This utility model relates to the field of desuperheating and pressure reducing devices for high-temperature steam, and in particular to a multi-layer skid-mounted desuperheating and pressure reducing device. Background Technology

[0002] In industrial production, desuperheating and pressure reducing devices are key equipment for regulating steam parameters and are widely used in industries such as power, petrochemicals, and metallurgy. Their core function is to reduce the temperature and pressure of high-temperature, high-pressure steam to the range required by the process, ensuring the safe and stable operation of downstream equipment. Existing desuperheating and pressure reducing devices mostly adopt a decentralized layout, with steam pipelines, high-pressure boiler water supply pipelines, and auxiliary pipelines scattered haphazardly. This not only occupies a large amount of installation space but also causes mutual interference between pipelines, increasing maintenance difficulty. During operation, traditional devices lack closed-loop control in the steam pressure reduction and desuperheating stages, resulting in asynchronous pressure and temperature monitoring and regulation, which easily leads to fluctuations in steam parameters and affects process stability.

[0003] In addition, there are obvious shortcomings in the maintenance and repair of existing equipment. Most key components such as pneumatic regulating valves and steam traps are not equipped with bypass pipelines. When a failure occurs, the machine must be shut down for maintenance, which leads to production interruption and economic losses. The condensate drainage system is poorly designed and is prone to water accumulation, which affects steam quality and system efficiency. The safety pressure relief system is mostly a single-circuit design. Once it fails, it may cause an overpressure safety accident. Utility Model Content

[0004] 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 multi-layer skid-mounted de-icing and pressure reducing device, with the aim of achieving a compact layout, convenient maintenance, and improved system stability. To this end, this utility model adopts the following technical solution.

[0005] A multi-layer skid-mounted desuperheating and pressure reducing device includes a steam pipeline, a high-pressure boiler water supply pipeline, and a condensate discharge pipeline. The steam pipeline, arranged in the steam flow direction, includes a steam pressure reducing pipeline section with a high-pressure steam input port for steam pressure reduction, a steam desuperheating pipeline section for steam desuperheating, and a steam outlet pipeline section with a steam output port. The condensate discharge pipeline, steam pressure reducing pipeline section, high-pressure boiler water supply pipeline, and steam outlet pipeline section are arranged horizontally on a skid-mounted base at different heights from bottom to top. The high-pressure boiler water supply pipeline is connected to the steam desuperheating pipeline section through a nozzle and has a high-pressure boiler water inlet. The steam desuperheating pipeline section is arranged vertically. The condensate discharge pipeline is connected upwards to the bottom of the downstream pipeline of the steam pressure reducing pipeline section in the steam flow direction through a vertical pipe. The upper end of the steam desuperheating pipeline section is connected to the steam outlet pipeline section through an inverted U-shaped pipe. By dividing each pipeline section into multiple horizontal layers at different heights, a compact layout of the equipment is achieved, saving installation space. The layered design facilitates independent operation and maintenance of each pipeline, reducing mutual interference between pipelines. The vertical setting of the steam desuperheating pipeline section and the connection method of the inverted U-shaped tube optimize the steam flow path, improve desuperheating efficiency and system stability, while the connection design of the condensate discharge pipeline can efficiently discharge condensate and reduce the impact on steam quality.

[0006] As a preferred technical approach: the steam pressure-reducing pipeline section, starting from the high-pressure steam inlet port, is sequentially equipped with a first gate valve, a first filter, a first pressure transmitter, a first integrated temperature transmitter, and a first pneumatic regulating valve system according to the steam flow direction. The first pressure transmitter and the first integrated temperature transmitter are electrically connected to the first pneumatic regulating valve system. A complete monitoring and regulation closed loop is formed from the high-pressure steam inlet to the pressure reduction process. The first pressure transmitter and the first integrated temperature transmitter provide real-time parameter feedback, enabling the first pneumatic regulating valve system to adjust, improving pressure reduction accuracy, ensuring stable parameters after steam pressure reduction, and meeting subsequent process requirements.

[0007] As a preferred technical means: the first pneumatic regulating valve system is equipped with a second gate valve and a third gate valve upstream and downstream of the steam flow direction, respectively. The first pneumatic regulating valve system also includes a first bypass pipeline, with its upstream end connected to the upstream of the second gate valve and its downstream end connected to the downstream of the third gate valve. A first shut-off valve is installed on the first bypass pipeline. In the event of a malfunction in the first pneumatic regulating valve system, the upstream and downstream gate valves can be closed and the bypass pipeline opened, enabling maintenance without shutting down the system and reducing downtime losses. The first shut-off valve on the bypass pipeline allows for flexible control of the bypass path, ensuring normal system operation during maintenance and improving the convenience and continuity of equipment maintenance.

[0008] As a preferred technical approach: a safety pressure relief system is installed upstream of the steam outlet pipeline section. This system consists of two parallel safety valve assemblies. Each assembly includes a fourth gate valve, a spring safety valve, and a second shut-off valve, arranged according to the steam pressure relief flow direction. The upstream ends of the two parallel safety valve assemblies are connected to the steam outlet pipeline section via a tee, and the downstream ends are connected to the pressure relief outlet pipeline via a tee. The two parallel spring safety valve assemblies constitute a safety pressure relief system, providing double protection so that even if one assembly fails, the other can still provide normal pressure relief, improving system safety. The connection design between the safety valve assemblies and the steam outlet pipeline section allows for rapid pressure relief in case of overpressure, controlling the pressure within a safe range and preventing equipment damage due to overpressure.

[0009] As a preferred technical approach, the fourth gate valve and the spring safety valve are connected via a tee, with the remaining port of the tee connected to a fifth gate valve. The fifth gate valve serves as a testing or maintenance interface, facilitating online verification or troubleshooting of the safety valve without disassembling the entire assembly, simplifying the maintenance process. Furthermore, it can assist in pressure relief in emergencies, enhancing the system's safety and maintainability.

[0010] As a preferred technical means: Two steam output pipes are installed downstream of the safety pressure relief system on the steam outlet pipeline section, namely the first output pipe and the second output pipe. The first output pipe is directly connected to the upstream pipe of the steam outlet pipeline section via a tee. The second output pipe is an L-shaped pipe, vertically connected to the lower part of the first output pipe via a tee. The second output pipe has a second steam output port, and a fifteenth gate valve is installed at the second steam output port. The first output pipe is equipped with a thermometer, a pressure gauge, and a second pneumatic regulating valve system in sequence according to the steam flow direction. The first output pipe has a first steam output port, and a sixth gate valve is installed at the first steam output port. A second pressure transmitter, a second integrated temperature transmitter, a thermometer, and a pressure gauge are installed on the downstream outlet pipe of the sixth gate valve. The second pressure transmitter and the second integrated temperature transmitter are electrically connected to the second pneumatic regulating valve system. The steam outlet pipeline connects two output pipelines to achieve steam diversion and output, meet the steam requirements of different processes, and improve the applicability of the equipment. The monitoring and regulation components of the first output pipeline can control the output steam parameters. The L-shaped design and gate valve settings of the second output pipeline facilitate flexible use of the output path and improve the flexibility of system operation.

[0011] As a preferred technical means: the second pneumatic regulating valve system is provided with a second bypass pipeline. A seventh gate valve and an eighth gate valve are respectively installed upstream and downstream of the second pneumatic regulating valve system. The upstream of the second bypass pipeline is connected to the upstream of the seventh gate valve, and the downstream of the second bypass pipeline is connected to the downstream of the eighth gate valve. A third shut-off valve is provided on the second bypass pipeline. Providing a bypass pipeline for the second pneumatic regulating valve system allows for uninterrupted maintenance in case of system failure, ensuring continuous steam output. The shut-off valve of the bypass pipeline, in conjunction with the upstream and downstream gate valves, reliably controls the opening and closing of the bypass passage, ensuring safety and system stability during maintenance.

[0012] As a preferred technical means: the high-pressure boiler water supply pipeline is sequentially equipped with a fourth shut-off valve, a second filter, a pressure gauge, a thermometer, a throttle valve, a third pneumatic regulating valve system, and a check valve, starting from the high-pressure boiler water inlet according to the high-pressure boiler water flow direction. The downstream pipeline of the check valve is connected to the nozzle. A third integrated temperature transmitter and a third pressure transmitter are installed on the steam outlet pipeline section between the safety pressure relief system and the two steam output pipelines. The third integrated temperature transmitter and the third pressure transmitter are electrically connected to the third pneumatic regulating valve system. This ensures effective filtration, monitoring, and regulation of the high-pressure boiler water from the inlet to the nozzle, guaranteeing stable high-pressure boiler water quality and flow rate, and improving the steam desuperheating effect. The third integrated temperature transmitter and the third pressure transmitter on the steam outlet pipeline section are linked with the third pneumatic regulating valve system, enabling real-time adjustment of the high-pressure boiler water supply based on steam parameters, thus improving desuperheating accuracy.

[0013] As a preferred technical means: the third pneumatic regulating valve system is provided with a third bypass pipeline. A ninth gate valve and a tenth gate valve are respectively located upstream and downstream of the third pneumatic regulating valve system. The upstream of the third bypass pipeline is connected to the upstream of the ninth gate valve, and the downstream of the third bypass pipeline is connected to the downstream of the tenth gate valve. A fifth shut-off valve is provided on the third bypass pipeline. By providing a bypass pipeline for the third pneumatic regulating valve system, in the event of a failure in the high-pressure boiler water regulating system, the high-pressure boiler water supply can be maintained through the bypass pipeline, ensuring that the steam desuperheating process is not interrupted, reducing the production impact caused by desuperheating failures, and facilitating the maintenance of the regulating valves, thereby improving the reliability and maintainability of the system.

[0014] As a preferred technical approach: the condensate drain pipe is equipped with a steam trap, which has a fourth bypass pipe. An eleventh gate valve and a twelfth gate valve are respectively located upstream and downstream of the steam trap. The upstream of the fourth bypass pipe connects to the upstream of the eleventh gate valve, and the downstream of the fourth bypass pipe connects to the downstream of the twelfth gate valve. A thirteenth gate valve is also located on the fourth bypass pipe. The riser and the condensate drain pipe are connected via a tee, with the remaining port of the tee connected to a fourteenth gate valve. The condensate drain pipe is equipped with a steam trap and a fourth bypass pipe. The steam trap efficiently drains condensate, and the bypass pipe can replace it in case of steam trap failure, ensuring smooth condensate drainage and preventing condensate accumulation from affecting system operation. The coordination of the upstream and downstream gate valves and the gate valves in the bypass pipe facilitates the maintenance and replacement of the steam trap, improving the stability and maintenance convenience of the condensate drain system.

[0015] Beneficial effects: 1. By horizontally arranging the pipelines at different heights, a compact layout is achieved, significantly saving installation space. The layered design also reduces mutual interference between pipelines, facilitating independent operation and maintenance. The vertical arrangement of the steam desuperheating pipeline sections and the inverted U-shaped pipe connections optimize the steam flow path, improving desuperheating efficiency and system stability. The rational connection of the condensate drain pipeline ensures efficient condensate drainage, minimizing its impact on steam quality.

[0016] 2. Achieving a complete closed-loop monitoring and regulation system for all pipelines, the pressure transmitters and integrated temperature transmitters in each pipeline are linked to the corresponding pneumatic control valve systems, which can regulate steam pressure, flow rate, and high-pressure boiler water supply to ensure stable steam parameters and meet different process requirements. The steam outlet pipeline section connects two output pipelines, realizing the diversion of steam output and improving the applicability and operational flexibility of the equipment.

[0017] 3. Both the pneumatic regulating valve system and the steam trap are equipped with bypass lines. In the event of a component failure, maintenance can be carried out without shutting down the system, reducing downtime losses and ensuring the continuity of system operation. Meanwhile, the connection design of each component, such as the tee interface of the safety valve assembly and the bypass line of the steam trap, simplifies the maintenance process and facilitates online verification, troubleshooting, and repair / replacement.

[0018] 4. The two parallel safety valve assemblies provide dual safety pressure relief, enabling rapid pressure relief in case of pipeline overpressure and preventing equipment damage due to overpressure; the reasonable setting of each gate valve and stop valve ensures the safety of the maintenance process; the system's control of steam parameters reduces safety hazards caused by abnormal parameters and significantly improves the safety and reliability of the system. Attached Figure Description Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 2 This is a top view of the structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the left-side structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the arrangement of various pipelines and ports of this utility model.

[0022] In the diagram: 1. High-pressure boiler water supply pipeline; 2. Condensate discharge pipeline; 3. Steam pressure reducing pipeline section; 4. Steam desuperheating pipeline section; 5. Steam outlet pipeline section; 6. Skid-mounted base; 7. Nozzle; 8. High-pressure boiler water inlet; 9. Steam trap; 10. U-tube; 11. First output pipeline; 12. Second output pipeline; 13. First gate valve; 14. First filter; 15. First pressure transmitter; 16. First integrated temperature transmitter; 17. First pneumatic control valve system; 18. Fourth gate valve; 19. Spring safety valve; 20. Second shut-off valve; 21. Fifth gate valve; 22. Thermometer; 23. Pressure gauge; 24. Second pneumatic control valve system; 25. Sixth gate valve; 26. Second pressure transmitter; 27. Second integrated temperature transmitter; 28. Fifteenth gate valve; 29. ​​Fourth... 30. Gate valve; 31. Second filter; 32. Throttling valve; 33. Third pneumatic control valve system; 34. Check valve; 35. Third integrated temperature transmitter; 36. Third pressure transmitter; 37. Second gate valve; 38. Third gate valve; 39. First bypass line; 40. First gate valve; 41. Second bypass line; 42. Seventh gate valve; 43. Eighth gate valve; 44. Third gate valve; 45. Ninth gate valve; 46. Tenth gate valve; 47. Fifth gate valve; 48. Fourth bypass line; 49. Eleventh gate valve; 50. Twelfth gate valve; 51. Thirteenth gate valve; 52. Fourteenth gate valve; 53. Pressure relief outlet line; 54. Condensate discharge port; 55. First steam output port; 56. Second steam output port; 57. High-pressure steam input port. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings.

[0024] Example 1 like Figures 1-4As shown, a multi-layer skid-mounted desuperheating and pressure reducing device includes a steam pipeline, a high-pressure boiler water supply pipeline 1, and a condensate discharge pipeline 2. The steam pipeline, in the direction of steam flow, includes a steam pressure reducing pipeline section 3 with a high-pressure steam input port 57 for steam pressure reduction, a steam desuperheating pipeline section 4 for steam desuperheating, and a steam outlet pipeline section 5 with a steam output port. The condensate discharge pipeline 2, the steam pressure reducing pipeline section 3, the high-pressure boiler water supply pipeline 1, and the steam outlet pipeline section 5 are arranged horizontally on a skid-mounted base 6 at different heights from bottom to top. The skid-mounted base 6 adopts a rectangular frame structure made of channel steel. The high-pressure boiler water supply pipeline 1 is connected to the steam desuperheating pipeline section 4 through a nozzle 7. The high-pressure boiler water supply pipeline 1 is provided with a high-pressure boiler water inlet 8. The steam desuperheating pipeline section 4 is arranged vertically. The condensate discharge pipeline 2 is connected upward to the bottom of the downstream pipeline of the steam pressure reducing pipeline section 3 in the direction of steam flow through a vertical pipe. A drain valve 9 is provided on the condensate discharge pipeline 2. The upper end of the steam desuperheating pipe section 4 is connected to the steam outlet pipe section 5 via an inverted U-shaped pipe 10. A safety pressure relief system is installed upstream of the steam outlet pipe section 5. Downstream of the safety pressure relief system, two steam output pipes are installed on the steam outlet pipe section 5 via a tee, namely the first output pipe 11 and the second output pipe 12. There are two steam output ports, located at the ends of the first output pipe 11 and the second output pipe 12, respectively.

[0025] To ensure stable parameters after steam pressure reduction, the steam pressure reduction pipeline section 3, starting from the high-pressure steam inlet port 57, is sequentially equipped with a first gate valve 13, a first filter 14, a thermometer 22, a first pressure transmitter 15, a first integrated temperature transmitter 16, and a first pneumatic regulating valve system 17, arranged according to the steam flow direction. The first pressure transmitter 15 and the first integrated temperature transmitter 16 are electrically connected to the first pneumatic regulating valve system 17. A complete monitoring and regulation closed loop is formed from the high-pressure steam inlet to the pressure reduction process. The first pressure transmitter 15 and the first integrated temperature transmitter 16 provide real-time parameter feedback, enabling the first pneumatic regulating valve system 17 to adjust, improving pressure reduction accuracy, ensuring stable parameters after steam pressure reduction, and meeting subsequent process requirements.

[0026] To achieve more reliable safety pressure relief, the safety pressure relief system consists of two parallel safety valve assemblies. Each safety valve assembly includes a fourth gate valve 18, a spring safety valve 19, and a second shut-off valve 20, arranged according to the steam pressure relief flow direction. The upstream ends of the two parallel safety valve assemblies are connected to the steam outlet pipe section 5 via a tee, and the downstream ends are connected to the pressure relief outlet pipe 53 via a tee. The two parallel spring safety valve assemblies constitute a safety pressure relief system, providing double protection so that even if one assembly fails, the other can still relieve pressure normally, improving system safety. The connection design between the safety valve assembly and the steam outlet pipe section 5 allows for rapid pressure relief in case of overpressure in the pipeline, controlling the pressure within a safe range and preventing equipment damage due to overpressure.

[0027] For ease of maintenance, the fourth gate valve 18 and the spring safety valve 19 are connected via a tee, with the remaining port of the tee connected to a fifth gate valve 21. The fifth gate valve 21 can serve as a testing or maintenance interface, facilitating online calibration or troubleshooting of the safety valve without disassembling the entire assembly, simplifying the maintenance process. It can also assist in pressure relief in emergencies, enhancing the system's safety and maintainability.

[0028] To meet the steam requirements of different processes, the first output pipe 11 is directly connected to the upstream pipe of the steam outlet pipe section 5 via a tee. The first output pipe 11 is equipped with a thermometer 22, a pressure gauge 23, and a second pneumatic regulating valve system 24 in sequence according to the steam flow direction. The first output pipe 11 has a first steam output port 55, and a sixth gate valve 25 is installed at the first steam output port 55. A second pressure transmitter 26, a second integrated temperature transmitter 27, a thermometer 22, and a pressure gauge 23 are installed on the downstream outlet pipe of the sixth gate valve 25. The second pressure transmitter 26 and the second integrated temperature transmitter 27 are electrically connected to the second pneumatic regulating valve system 24. The second output pipe 12 is an L-shaped pipe, which is vertically connected to the lower part of the first output pipe 11 via a tee. The second output pipe 12 has a second steam output port 56, and a fifteenth gate valve 28 is installed at the second steam output port 56 as a steam output on / off control valve. Steam outlet pipe section 5 connects two output pipes with different control precision, realizing steam diversion output with different accuracy to meet the steam requirements of different processes and improve equipment applicability; the monitoring and regulation components of the first output pipe 11 can control the output steam parameters; the L-shaped design and gate valve setting of the second output pipe 12 facilitate the flexible use of the output path and improve the flexibility of system operation.

[0029] To ensure the stability of the high-pressure boiler water quality and flow rate, the high-pressure boiler water supply pipeline 1 is sequentially installed from the high-pressure boiler water inlet 8, consisting of a fourth shut-off valve 29, a second filter 30, a pressure gauge 23, a thermometer, a throttle valve 31, a third pneumatic regulating valve system 32, and a check valve 33. The downstream pipe of the check valve 33 is connected to the nozzle 7. On the steam outlet pipeline section 5, between the safety pressure relief system and the two steam output pipelines, a third integrated temperature transmitter 34 and a third pressure transmitter 35 are installed. These transmitters are electrically connected to the third pneumatic regulating valve system 32. This ensures effective filtration, monitoring, and regulation of the high-pressure boiler water from the inlet to the nozzle 7, guaranteeing stable high-pressure boiler water quality and flow rate, and improving the steam desuperheating effect. The third integrated temperature transmitter 34 and the third pressure transmitter 35 on the steam outlet pipeline section 5 are linked with the third pneumatic regulating valve system 32, enabling real-time adjustment of the high-pressure boiler water supply based on steam parameters, thus improving desuperheating accuracy.

[0030] When the desuperheating and pressure reducing device is running, high-pressure steam enters the steam pressure reducing pipeline section 3 from the high-pressure steam input port 57. Following the steam flow direction, it sequentially passes through the first gate valve 13 to control the flow rate, and then enters the first filter 14 to filter impurities, preventing them from affecting the operation of subsequent equipment. The filtered high-pressure steam then flows sequentially through a thermometer, a first pressure transmitter 15, and a first integrated temperature transmitter 16. The thermometer and the first integrated temperature transmitter 16 monitor the steam temperature in real time, while the first pressure transmitter 15 monitors the steam pressure in real time and transmits the data to the first pneumatic regulating valve system 17. The first pneumatic regulating valve system 17 automatically adjusts according to the received parameters, controlling the steam pressure to the required range. The adjusted steam continues to flow downstream of the steam pressure reducing pipeline section 3.

[0031] High-pressure boiler water enters the high-pressure boiler water supply pipeline 1 through the high-pressure boiler water inlet 8. It first passes through the fourth shut-off valve 29 to control its flow, then enters the second filter 30 to filter impurities, ensuring the quality of the high-pressure boiler water. The filtered high-pressure boiler water then passes through a pressure gauge 23 and a thermometer to monitor pressure and temperature parameters. After initial flow regulation by the throttle valve 31, it enters the third pneumatic regulating valve system 32. Simultaneously, the third integrated temperature transmitter 34 and the third pressure transmitter 35, located on the steam outlet pipeline section 5 between the safety pressure relief system and the two steam output pipelines, monitor the temperature and pressure of the desuperheated steam in real time and feed the data back to the third pneumatic regulating valve system 32. This system further precisely adjusts the high-pressure boiler water flow based on the feedback data to ensure the desuperheating effect. The regulated high-pressure boiler water passes through a check valve 33 to prevent backflow and is finally sprayed into the steam desuperheating pipeline section 4 through the nozzle 7.

[0032] In the steam desuperheating pipe section 4, the depressurized high-pressure steam is fully mixed with the high-pressure boiler water sprayed from the nozzle 7 to achieve desuperheating. The desuperheated steam enters the steam outlet pipe section 5 through the inverted U-shaped pipe 10 at the upper end of the vertically set steam desuperheating pipe section 4.

[0033] The safety pressure relief system upstream of steam outlet pipeline section 5 is on standby. This system consists of two parallel safety valve assemblies. When the pressure inside the pipeline exceeds the set value, at least one safety valve assembly is activated. The overpressure steam passes sequentially through the fourth gate valve 18, the spring safety valve 19, and the second shut-off valve 20, and is discharged through the pipeline to the safety pressure relief location, ensuring system safety. The fifth gate valve 21, which connects the fourth gate valve 18 and the spring safety valve 19 via a tee, can serve as a testing or maintenance interface, facilitating online calibration or troubleshooting of the safety valves.

[0034] After being de-temperatured and depressurized, the steam is split into two streams at the steam outlet pipe section 5 via a tee: one stream enters the first output pipe 11, where it is monitored by the temperature gauge 22 and pressure gauge 23, and then regulated by the second pneumatic regulating valve system 24. The regulated steam is then controlled by the sixth gate valve 25 and output from the first steam output port 55. The second pressure transmitter 26, the second integrated temperature transmitter 27, the temperature gauge 22, and the pressure gauge 23 downstream of the sixth gate valve 25 will monitor the final parameters of the output steam. The other stream enters the L-shaped second output pipe 12 and is output after being controlled by the fifteenth gate valve 28 at the second steam output port 56. This achieves the diversion of steam output to meet the steam requirements of different processes.

[0035] The condensate generated at the bottom of the downstream pipeline of the steam pressure reducing pipeline section 3, as well as the high-pressure boiler water that is not fully atomized at the nozzle 7, flows down into the condensate discharge pipeline 2 through the vertical pipe as a high-pressure condensate medium. After passing through the steam trap 9, it is discharged from the condensate discharge port 54 along the condensate discharge pipeline 2, ensuring timely discharge of condensate, avoiding accumulation that affects steam quality, and ensuring stable and efficient operation of the equipment.

[0036] This device achieves a compact layout by dividing each pipeline section into multiple horizontal layers at different heights, saving installation space. The layered design facilitates independent operation and maintenance of each pipeline and reduces mutual interference.

[0037] Example 2 Unlike the previous embodiment, the first pneumatic regulating valve system 17 is equipped with a second gate valve 36 and a third gate valve 37 upstream and downstream of the steam flow direction, respectively. The first pneumatic regulating valve system 17 also includes a first bypass pipe 38, with its upstream end connected to the upstream of the second gate valve 36 and its downstream end connected to the downstream of the third gate valve 37. A first shut-off valve 39 is installed on the first bypass pipe 38. In the event of a malfunction in the first pneumatic regulating valve system 17, the upstream and downstream gate valves can be closed while the bypass pipe is opened, enabling maintenance without shutting down the system and reducing downtime losses. The first shut-off valve 39 of the bypass pipe allows for flexible control of the bypass path, ensuring normal system operation during maintenance and improving the convenience and continuity of equipment maintenance.

[0038] Example 3 Unlike embodiments one or two above, the second pneumatic regulating valve system 24 is provided with a second bypass pipeline 40. A seventh gate valve 41 and an eighth gate valve 42 are respectively located upstream and downstream of the second pneumatic regulating valve system 24. The upstream of the second bypass pipeline 40 is connected to the upstream of the seventh gate valve 41, and the downstream of the second bypass pipeline 40 is connected to the downstream of the eighth gate valve 42. A third shut-off valve 43 is provided on the second bypass pipeline 40. Providing a bypass pipeline for the second pneumatic regulating valve system 24 allows for uninterrupted maintenance in case of a malfunction, ensuring continuous steam output. The shut-off valve of the bypass pipeline, in conjunction with the upstream and downstream gate valves, reliably controls the opening and closing of the bypass passage, ensuring safety and system stability during maintenance.

[0039] Example 4 Unlike embodiments one, two, or three above, the third pneumatic regulating valve system 32 is provided with a third bypass pipe 44. A ninth gate valve 45 and a tenth gate valve 46 are respectively located upstream and downstream of the third pneumatic regulating valve system 32. The upstream of the third bypass pipe 44 is connected to the upstream of the ninth gate valve 45, and the downstream of the third bypass pipe 44 is connected to the downstream of the tenth gate valve 46. A fifth shut-off valve 47 is provided on the third bypass pipe 44. By providing a bypass pipe for the third pneumatic regulating valve system 32, in the event of a failure in the high-pressure boiler water regulating system, the high-pressure boiler water supply can be maintained through the bypass pipe, ensuring that the steam desuperheating process is not interrupted, reducing the production impact caused by desuperheating failures, and facilitating the maintenance of the regulating valves, thereby improving the reliability and maintainability of the system.

[0040] Example 5 Unlike embodiments one, two, three, or four above, the steam trap 9 is equipped with a fourth bypass pipe 48. An eleventh gate valve 49 and a twelfth gate valve 50 are respectively installed upstream and downstream of the steam trap 9. The upstream of the fourth bypass pipe 48 is connected to the upstream of the eleventh gate valve 49, and the downstream of the fourth bypass pipe 48 is connected to the downstream of the twelfth gate valve 50. A thirteenth gate valve 51 is installed on the fourth bypass pipe 48. The riser and the condensate drain pipe 2 are connected by a tee, and the remaining port of the tee is connected to the fourteenth gate valve 52. This gate valve can temporarily switch on / off or assist in drainage when the condensate drain pipe 2 is under maintenance, improving the convenience of maintenance. The condensate discharge line 2 is equipped with a steam trap 9 and a fourth bypass line 48. The steam trap 9 can efficiently discharge condensate, and the bypass line can replace the steam trap 9 when it fails, ensuring smooth condensate discharge and preventing condensate accumulation from affecting system operation. The upstream and downstream gate valves and the gate valve of the bypass line work together to facilitate the maintenance and replacement of the steam trap 9, improving the stability and maintenance convenience of the condensate discharge system.

[0041] The multi-layer skid-mounted de-heating and de-pressure device shown above is a specific embodiment of this utility model, which has demonstrated the substantial features and progress of this utility model. According to actual use 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 protection scope of this solution.

Claims

1. A multi-layer skid-mounted desuperheating and pressure reducing device, characterized in that: The system includes a steam pipeline, a high-pressure boiler water supply pipeline, and a condensate discharge pipeline. The steam pipeline, arranged in the steam flow direction, includes a steam pressure reducing pipeline section with a high-pressure steam inlet for steam pressure reduction, a steam temperature reducing pipeline section for steam temperature reduction, and a steam outlet pipeline section with a steam outlet. The condensate discharge pipeline, steam pressure reducing pipeline section, high-pressure boiler water supply pipeline, and steam outlet pipeline section are arranged horizontally on a skid mount at different heights from bottom to top. The high-pressure boiler water supply pipeline is connected to the steam temperature reducing pipeline section via a nozzle and has a high-pressure boiler water inlet. The steam temperature reducing pipeline section is arranged vertically. The condensate discharge pipeline is connected upwards via a vertical pipe to the bottom of the downstream pipeline of the steam pressure reducing pipeline section in the steam flow direction. The upper end of the steam temperature reducing pipeline section is connected to the steam outlet pipeline section via an inverted U-shaped pipe.

2. The multi-layer skid-mounted desuperheating and pressure reducing device according to claim 1, characterized in that: The steam pressure reducing pipeline section is provided with a first gate valve, a first filter, a first pressure transmitter, a first integrated temperature transmitter, and a first pneumatic regulating valve system in sequence according to the steam flow direction, starting from the high-pressure steam input port. The first pressure transmitter and the first integrated temperature transmitter are electrically connected to the first pneumatic regulating valve system.

3. The multi-layer skid-mounted desuperheating and pressure reducing device according to claim 2, characterized in that: The first pneumatic regulating valve system is provided with a second gate valve and a third gate valve upstream and downstream of the steam flow direction, respectively. The first pneumatic regulating valve system is provided with a first bypass pipeline. The upstream of the first bypass pipeline is connected to the upstream of the second gate valve, and the downstream of the first bypass pipeline is connected to the downstream of the third gate valve. A first shut-off valve is provided on the first bypass pipeline.

4. The multi-layer skid-mounted desuperheating and pressure reducing device according to claim 1, characterized in that: A safety pressure relief system is provided upstream of the steam outlet pipeline section. The safety pressure relief system consists of two parallel safety valve assemblies. Each safety valve assembly includes a fourth gate valve, a spring safety valve, and a second shut-off valve according to the steam pressure relief flow direction. The upstream end of the two parallel safety valve assemblies is connected to the steam outlet pipeline section through a tee, and the downstream end of the two parallel safety valve assemblies is connected to the pressure relief outlet pipeline through a tee.

5. A multi-layer skid-mounted desuperheating and pressure reducing device according to claim 4, characterized in that: The fourth gate valve and the spring safety valve are connected by a tee, and the remaining port of the tee is connected to a fifth gate valve.

6. A multi-layer skid-mounted desuperheating and pressure reducing device according to claim 4, characterized in that: The steam outlet pipeline section, located downstream of the safety pressure relief system, has two steam output pipelines connected via a tee: a first output pipeline and a second output pipeline. The first output pipeline is directly connected to the upstream pipeline of the steam outlet pipeline section via a tee. The second output pipeline is an L-shaped pipeline, vertically connected to the lower part of the first output pipeline via a tee. The second output pipeline has a second steam output port, at which a fifteenth gate valve is installed. The first output pipeline, arranged sequentially in the steam flow direction, is equipped with a thermometer, a pressure gauge, and a second pneumatic regulating valve system. The first output pipeline has a first steam output port, at which a sixth gate valve is installed. Downstream of the sixth gate valve, on the outlet pipeline, a second pressure transmitter, a second integrated temperature transmitter, a thermometer, and a pressure gauge are installed. The second pressure transmitter and the second integrated temperature transmitter are electrically connected to the second pneumatic regulating valve system.

7. A multi-layer skid-mounted desuperheating and pressure reducing device according to claim 6, characterized in that: The second pneumatic regulating valve system is provided with a second bypass pipeline. The upstream and downstream of the second pneumatic regulating valve system are respectively provided with a seventh gate valve and an eighth gate valve. The upstream of the second bypass pipeline is connected to the upstream of the seventh gate valve, and the downstream of the second bypass pipeline is connected to the downstream of the eighth gate valve. A third shut-off valve is provided on the second bypass pipeline.

8. The multi-layer skid-mounted desuperheating and pressure reducing device according to claim 1, characterized in that: The high-pressure boiler water supply pipeline is arranged in sequence from the high-pressure boiler water inlet, including a fourth shut-off valve, a second filter, a pressure gauge, a thermometer, a throttle valve, a third pneumatic regulating valve system, and a check valve. The downstream pipeline of the check valve is connected to the nozzle. The steam outlet pipeline section is equipped with a third integrated temperature transmitter and a third pressure transmitter located between the safety pressure relief system and the two steam output pipelines. The third integrated temperature transmitter and the third pressure transmitter are electrically connected to the third pneumatic regulating valve system.

9. A multi-layer skid-mounted desuperheating and pressure reducing device according to claim 8, characterized in that: The third pneumatic regulating valve system is provided with a third bypass pipeline. The upstream and downstream of the third pneumatic regulating valve system are respectively provided with a ninth gate valve and a tenth gate valve. The upstream of the third bypass pipeline is connected to the upstream of the ninth gate valve, and the downstream of the third bypass pipeline is connected to the downstream of the tenth gate valve. The third bypass pipeline is provided with a fifth shut-off valve.

10. A multi-layer skid-mounted desuperheating and pressure reducing device according to claim 1, characterized in that: The condensate drain pipe is equipped with a steam trap, which has a fourth bypass pipe. An eleventh gate valve and a twelfth gate valve are respectively located upstream and downstream of the steam trap. The upstream of the fourth bypass pipe is connected to the upstream of the eleventh gate valve, and the downstream of the fourth bypass pipe is connected to the downstream of the twelfth gate valve. A thirteenth gate valve is also located on the fourth bypass pipe. The riser and the condensate drain pipe are connected via a tee, and the remaining port of the tee is connected to the fourteenth gate valve.

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