An integrated skid-mounted desuperheating and pressure reducing device

Abstract

This utility model discloses an integrated skid-mounted desuperheating and pressure reducing device, relating to the field of high-pressure steam desuperheating and pressure reducing devices. Traditional devices suffer from problems such as poor nozzle atomization, high susceptibility to operating conditions, low adjustment accuracy, dispersed structure, difficult installation, high leakage risk, and lack of effective stress relief design. This utility model includes a steam pipeline and a desuperheating water supply pipeline. The steam pipeline includes an inlet pipeline, a pressure reducing and desuperheating mixing pipeline, and an outlet pipeline. The steam pipeline includes a first gate valve, a low-noise sleeve regulating valve, an adjustable atomizing nozzle device, a spring safety valve, a second gate valve, etc. The outlet pipeline is equipped with a first pressure gauge, a bimetallic thermometer, a pressure transmitter, and a thermal resistor, etc. The desuperheating water supply pipeline includes a shut-off valve, a second pressure gauge, a throttle valve, a sleeve-guided single-seat regulating valve, and a filter. This design establishes a full-process safety barrier, improves adjustment accuracy and system reliability and safety, and achieves efficient desuperheating and pressure reducing with safety monitoring.

Description

Technical Field

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

[0002] In industrial production, the parameter control of superheated steam in thermal power plants, chemical processes, and industrial steam pipelines is a crucial step in ensuring the safe and stable operation of downstream equipment. Superheated steam needs to undergo desuperheating and pressure reduction treatment to bring its pressure and temperature down to within the range required by downstream equipment. This process mainly relies on desuperheating and pressure reduction devices.

[0003] Traditional desuperheating and pressure reducing devices, which are widely used today, have revealed numerous technical defects in actual operation. In the desuperheating stage, the atomization performance of the core component, the nozzle, is poor, and its atomization effect is highly susceptible to fluctuations in steam conditions. When steam flow and pressure fluctuate, the desuperheating water atomized from traditional nozzles produces coarse and unevenly distributed particles, resulting in insufficient mixing of the desuperheating water and high-temperature steam. This not only reduces desuperheating efficiency but may also cause thermal stress concentration on the inner wall of the pipe due to excessive local temperature differences, shortening the equipment's service life.

[0004] Traditional equipment also has significant shortcomings in terms of system safety and regulation accuracy. On the one hand, the pressure and temperature regulation components of existing equipment are slow to respond and cannot quickly adapt to changes in operating conditions, resulting in large fluctuations in outlet steam parameters and affecting the stability of downstream production processes. On the other hand, the overall structure of the equipment is dispersed, and various functional components need to be assembled and connected on-site, which not only increases the installation difficulty and footprint, but also increases the risk of leakage due to the numerous pipeline connection points. In addition, traditional equipment lacks effective stress relief design. Under high temperature and high pressure conditions, the stress generated by thermal expansion and contraction of pipelines cannot be properly released, which can easily lead to pipeline deformation or even rupture and other safety accidents.

[0005] With the increasing demands of modern industry for steam parameter stability, system operating efficiency, and safety, traditional desuperheating and pressure reducing devices are no longer sufficient to meet practical needs. Therefore, developing a desuperheating and pressure reducing device with high-efficiency atomization performance, precise adjustment capability, compact structure, and high safety has become an urgent need in the current industrial field. Utility Model Content

[0006] 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 an integrated skid-mounted de-cooling and pressure reducing device to achieve efficient de-cooling, pressure reducing, and safety monitoring. To this end, this utility model adopts the following technical solution.

[0007] An integrated skid-mounted desuperheating and pressure reducing device includes a steam pipeline and a desuperheating water supply pipeline. The steam pipeline includes an inlet pipeline for inputting high-temperature and high-pressure steam, a desuperheating and pressure reducing mixing pipeline for depressurizing and cooling the steam, and an outlet pipeline for outputting treated steam, connected in sequence. The inlet pipeline is equipped with a first gate valve. The desuperheating and pressure reducing mixing pipeline is equipped with a low-noise sleeve regulating valve for depressurizing the high-pressure steam and an adjustable atomizing nozzle device for desuperheating the high-temperature steam, arranged in the direction of steam flow. The adjustable atomizing nozzle device is connected to the desuperheating water supply pipeline. The outlet pipeline is equipped with a first pressure gauge, a bimetallic thermometer, a pressure transmitter, and a thermal resistor. A second gate valve is provided between the desuperheating and pressure reducing mixing pipeline and the outlet pipeline. A spring safety valve for releasing overpressured steam is provided at the end of the desuperheating and pressure reducing mixing pipeline near the second gate valve. By integrating a complete steam desuperheating and pressure reduction process with safety monitoring components, the system ensures the continuity and accuracy of steam parameter control. It also constructs a full-process safety barrier through spring safety valves and real-time detection components, solving the problem that traditional nozzle atomization is greatly affected by operating conditions. At the same time, it improves the adjustment accuracy, significantly enhances the reliability and safety of system operation, and achieves efficient desuperheating and pressure reduction as well as safety monitoring.

[0008] As a preferred technical means, the desuperheating water supply pipeline is equipped with a shut-off valve, a second pressure gauge, a throttle valve, a sleeve-guided single-seat regulating valve, and a filter in sequence according to the desuperheating water flow direction. The downstream pipeline of the filter is connected to the adjustable atomizing nozzle device. Through the orderly cooperation of each component, the flow rate and pressure of the desuperheating water can be precisely controlled. The filter can effectively intercept impurities, ensuring that the desuperheating water entering the adjustable atomizing nozzle device is clean and stable, thus providing a guarantee for efficient atomization.

[0009] As a preferred technical means, the adjustable atomizing nozzle device includes an insert-type welded flange, an insert-type water spray device, and a necked weld neck flange assembly. A sealing structure is provided between the insert-type welded flange and the insert-type water spray device, and they are connected and fixed by a cylindrical pin positioning and fastening assembly. The insert-type water spray device and the necked weld neck flange assembly are connected by full-circumferential welding. The connection structure of the adjustable atomizing nozzle device enhances the installation accuracy and sealing reliability of the nozzle. The sealing structure design reduces the risk of steam and desuperheating water leakage, and improves the stability of nozzle operation.

[0010] As a preferred technical means, the adjustable atomizing nozzle device has a built-in spring assembly that automatically adjusts the spray flow rate in response to changes in inlet water pressure. This adaptive adjustment of the flow rate to changes in inlet water pressure enhances the device's adaptability to fluctuations in operating conditions and ensures stable atomization performance.

[0011] As a preferred technical approach: the steam pipeline and the desuperheating water supply pipeline are connected to the skid-mounted base via brackets. The steam pipeline is positioned at a height of 800-900mm from the surface of the skid-mounted base, and the desuperheating water supply pipeline is positioned at a height of 140-170mm from the surface of the skid-mounted base. This optimized layout facilitates the installation and maintenance of the steam pipeline and the desuperheating water supply pipeline, avoids mutual interference between them, and improves space utilization efficiency.

[0012] As a preferred technical approach, the supports for the inlet and outlet pipes are sliding supports. This effectively alleviates the stress caused by thermal expansion and contraction in the inlet and outlet pipes, protects the pipe connections, and extends the service life of the device.

[0013] As a preferred technical approach, the inlet pipeline is equipped with two first gate valves arranged in the direction of steam flow, and the desuperheating water inlet is also equipped with two shut-off valves arranged in the direction of flow. This forms dual control and safety redundancy, allowing the backup valve to intervene promptly in case of a failure of the main valve, ensuring continuous system operation.

[0014] Beneficial effects: By integrating a complete steam desuperheating and pressure reduction process with safety monitoring components, the continuity and accuracy of steam parameter control are ensured. Furthermore, a full-process safety barrier is constructed through spring safety valves and real-time detection components. This solves the problem that traditional nozzle atomization is greatly affected by operating conditions, improves adjustment accuracy, and significantly enhances the reliability and safety of system operation, achieving efficient desuperheating and pressure reduction as well as safety monitoring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0016] Figure 2 This is a top view of the structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the adjustable atomizing nozzle device of this utility model.

[0018] In the diagram: 1. Inlet pipe; 2. Pressure reducing and temperature reducing mixing pipe; 3. Outlet pipe; 4. First gate valve; 5. Low-noise sleeve regulating valve; 6. Adjustable atomizing nozzle device; 7. First pressure gauge; 8. Pressure transmitter; 9. Bimetallic thermometer; 10. Resistance temperature detector; 11. Second gate valve; 12. Spring safety valve; 13. Shut-off valve; 14. Second pressure gauge; 15. Throttle valve; 16. Sleeve-guided single-seat regulating valve; 17. Filter; 18. Skid-mounted base; 19. Sliding bracket; 601. Insertion welding flange; 602. Insertion water spray device; 60201. Flange connection; 603. Necked butt-welded flange assembly; 604. Cylindrical pin; 605. Spring assembly. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1

[0021] like Figure 1 , 2 As shown, an integrated skid-mounted desuperheating and pressure reducing device includes a steam pipeline and a desuperheating water supply pipeline. The steam pipeline includes an inlet pipeline 1 for inputting high-temperature and high-pressure steam, a pressure-reducing and desuperheating mixing pipeline 2 for reducing and desuperheating the steam, and an outlet pipeline 3 for outputting treated steam, connected in sequence. A first gate valve 4 is provided on the inlet pipeline 1. The pressure-reducing and desuperheating mixing pipeline 2 is provided with a low-noise sleeve regulating valve 5 for reducing the pressure of the high-pressure steam and an adjustable atomizing nozzle device 6 for desuperheating the high-temperature steam, arranged in sequence according to the steam flow direction. The steam outlet end of the low-noise sleeve regulating valve 5 is connected to... The conical pipe section is connected to the pressure-reducing and desuperheating mixing pipeline 2. The diameter of the pressure-reducing and desuperheating mixing pipeline 2 is larger than that of the inlet pipeline 1, which is conducive to the diffusion of steam after pressure reduction and the mixing with desuperheating water. The adjustable atomizing nozzle device 6 is connected to the desuperheating water supply pipeline. The outlet pipeline 3 is equipped with a first pressure gauge 7, a pressure transmitter 8, a bimetallic thermometer 9 and a thermal resistor 10 in sequence according to the steam flow direction. A second gate valve 11 is provided between the pressure-reducing and desuperheating mixing pipeline 2 and the outlet pipeline 3. A spring safety valve 12 for releasing overpressure steam is provided at one end of the pressure-reducing and desuperheating mixing pipeline 2 near the second gate valve 11.

[0022] To ensure the cleanliness and stability of the desuperheating water entering the adjustable atomizing nozzle device 6, the desuperheating water supply pipeline is equipped with a shut-off valve 13, a second pressure gauge 14, a throttle valve 15, a sleeve-guided single-seat regulating valve 16, and a filter 17 in sequence according to the desuperheating water flow direction. The downstream pipeline of the filter 17 is connected to the adjustable atomizing nozzle device 6. Through the orderly cooperation of each component, the flow rate and pressure of the desuperheating water can be precisely controlled. The filter 17 can effectively intercept impurities, ensuring the cleanliness and stability of the desuperheating water entering the adjustable atomizing nozzle device 6, thus providing a guarantee for efficient atomization.

[0023] For ease of installation and maintenance, the steam piping and desuperheating water supply piping are connected to the skid-mounted base 18 via brackets. The steam piping is positioned at a height of 880mm from the surface of the skid-mounted base 18, while the desuperheating water supply piping is positioned at a height of 155mm from the surface of the skid-mounted base 18. This optimized layout facilitates the installation and maintenance of both the steam and desuperheating water supply piping, avoids mutual interference between them, and improves space utilization efficiency.

[0024] To extend the service life of the device, the supports for the inlet pipe 1 and the outlet pipe 3 are sliding supports 19. These supports effectively alleviate the stress caused by thermal expansion and contraction in the inlet and outlet pipes 3, protect the pipe connections, and extend the service life of the device.

[0025] To improve the stability of nozzle operation, such as Figure 3 As shown, the adjustable atomizing nozzle device 6 includes an insert-type welding flange 601, an insert-type water spray device 602, and a necked welding flange assembly 603. The lower end of the insert-type welding flange 601 is connected and sealed to the pressure-reducing and temperature-reducing mixing pipeline 2 by welding. The insert-type water spray device 602 is inserted from top to bottom into the center hole of the insert-type welding flange 601, and the nozzle part at its lower end extends into the center of the pressure-reducing and temperature-reducing mixing pipeline 2. The upper part of the insert-type water spray device 602 is provided with a flange connection part 60201, which is sealed to the insert-type welding flange 601 by a sealing structure and is connected and fastened by a cylindrical pin 604 positioning and fastening assembly. The necked welding flange assembly 603 includes two opposing necked welding flanges connected by a fastening assembly. The upper end of the insert-type welding flange 601 and the lower end of the necked welding flange assembly 603 are welded around the entire circumference. In this embodiment, the sealing structure uses a spiral wound gasket. Spiral wound gaskets are installed between the insert-type water spray device 602 and the insert-type welded flange 601, and between the two weld neck flanges of the weld neck flange assembly 603. The insert-type welded flange 601 and the insert-type water spray device 602 are connected and fastened by eight sets of fastening assemblies using fully threaded studs, Type II hexagonal nuts, and flat washers. The two weld neck flanges of the weld neck flange assembly 603 are connected and fastened by four sets of fastening assemblies using fully threaded studs, Type II hexagonal nuts, and flat washers. The upper end of the weld neck flange assembly 603 is circumferentially welded to the desuperheating water supply pipeline. The connection structure of the adjustable atomizing nozzle device 6 enhances the installation accuracy and sealing reliability of the nozzle. The sealing structure design reduces the risk of steam and desuperheating water leakage and improves the operational stability of the nozzle device.

[0026] During operation, high-temperature and high-pressure steam enters the steam pipeline from the inlet pipeline 1. After the flow rate is controlled by the first gate valve 4, it flows into the pressure-reducing and desuperheating mixing pipeline 2. In this pipeline, the steam first passes through the low-noise sleeve regulating valve 5, and the pressure is initially reduced by adjusting the valve opening, so that the steam pressure drops to close to the target range.

[0027] Meanwhile, the desuperheating water enters from the desuperheating water supply pipeline and passes sequentially through the shut-off valve 13, the second pressure gauge 14, the throttle valve 15, and the sleeve-guided single-seat regulating valve 16. These components work together to precisely control the flow and pressure of the desuperheating water. Subsequently, the desuperheating water flows through the filter 17, where impurities are effectively intercepted, and the clean desuperheating water enters the adjustable atomizing nozzle device 6.

[0028] The desuperheating water entering the adjustable atomizing nozzle device 6 is delivered to the nozzle section through the insertion spray device 602. At this time, the high-temperature steam that has undergone preliminary depressurization mixes thoroughly with the atomized desuperheating water sprayed from the adjustable atomizing nozzle device 6 in the depressurization and desuperheating mixing pipeline 2, achieving heat exchange and rapidly reducing the steam temperature to the target value.

[0029] The steam, after being de-cooled and depressurized, continues to flow and enters the outlet pipeline 3 after passing through the second gate valve 11. In the outlet pipeline 3, the first pressure gauge 7 and the pressure transmitter 8 monitor the steam pressure in real time, while the bimetallic thermometer 9 and the thermal resistor 10 monitor the steam temperature in real time, ensuring that the steam parameters remain stable within the design range, and finally, qualified steam is delivered to the downstream equipment.

[0030] If the pressure in the pressure-reducing and temperature-reducing mixing pipeline 2 exceeds the set value, the spring safety valve 12 near the second gate valve 11 will automatically open to release the overpressure steam, prevent the pressure from being too high and causing a safety accident, and ensure the safe operation of the entire device.

[0031] This device integrates a complete steam desuperheating and pressure reduction process with safety monitoring components, ensuring the continuity and accuracy of steam parameter control. It also constructs a safety barrier through the spring safety valve 12 and real-time detection components, solving the problem that traditional nozzle atomization is greatly affected by operating conditions. Furthermore, it improves the adjustment accuracy, significantly enhancing the reliability and safety of system operation, and achieving efficient desuperheating and pressure reduction as well as safety monitoring.

[0032] Example 2

[0033] The difference from Embodiment 1 above is that, as Figure 3 As shown, the adjustable atomizing nozzle device 6 has a built-in spring assembly 605 that automatically adjusts the spray flow rate in response to changes in inlet water pressure. This adaptive adjustment of the flow rate to changes in inlet water pressure enhances the device's adaptability to fluctuations in operating conditions and ensures stable atomization performance.

[0034] Example 3

[0035] The difference from Embodiment 1 or 2 above is that, as Figure 1 , 2 As shown, the inlet pipe 1 has two first gate valves 4 arranged in the direction of steam flow, and the desuperheating water inlet has two shut-off valves 13 arranged in the same direction of flow. This forms a dual control and safety redundancy, so that if the main valve fails, the backup valve can intervene in time, effectively ensuring the continuous operation of the system.

[0036] The integrated skid-mounted de-cooling 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. An integrated skid-mounted desuperheating and pressure reducing device, comprising a steam pipeline and a desuperheating water supply pipeline, characterized in that: The steam pipeline includes, in sequence, an inlet pipeline for inputting high-temperature, high-pressure steam, a pressure-reducing and temperature-reducing mixing pipeline for reducing and cooling the steam, and an outlet pipeline for outputting processed steam. The inlet pipeline is equipped with a first gate valve. The pressure-reducing and temperature-reducing mixing pipeline is equipped, in the direction of steam flow, with a low-noise sleeve regulating valve for reducing the pressure of the high-pressure steam and an adjustable atomizing nozzle device for cooling the high-temperature steam. The adjustable atomizing nozzle device is connected to a cooling water supply pipeline. The outlet pipeline is equipped with a first pressure gauge, a bimetallic thermometer, a pressure transmitter, and a thermal resistor. A second gate valve is located between the pressure-reducing and temperature-reducing mixing pipeline and the outlet pipeline. A spring safety valve for releasing overpressured steam is located at the end of the pressure-reducing and temperature-reducing mixing pipeline near the second gate valve.

2. The integrated skid-mounted desuperheating and pressure reducing device according to claim 1, characterized in that: The desuperheating water supply pipeline is equipped with a shut-off valve, a second pressure gauge, a throttle valve, a sleeve-guided single-seat regulating valve, and a filter in sequence according to the desuperheating water flow direction. The downstream pipeline of the filter is connected to an adjustable atomizing nozzle device.

3. The integrated skid-mounted desuperheating and pressure reducing device according to claim 2, characterized in that: The adjustable atomizing nozzle device includes an insert-type welding flange, an insert-type water spray device, and a necked butt-welded flange assembly. A sealing structure is provided between the insert-type welding flange and the insert-type water spray device, and they are connected and fixed by a cylindrical pin positioning and fastening assembly. The insert-type water spray device and the necked butt-welded flange assembly are connected by full-circumference welding.

4. The integrated skid-mounted desuperheating and pressure reducing device according to claim 3, characterized in that: The adjustable atomizing nozzle device has a built-in spring assembly that automatically adjusts the spray flow rate in response to changes in inlet water pressure.

5. The integrated skid-mounted desuperheating and pressure reducing device according to claim 1, characterized in that: The steam pipeline and the desuperheating water supply pipeline are connected to the skid base via brackets. The steam pipeline is arranged at a height of 800-900mm from the surface of the skid base, and the desuperheating water supply pipeline is arranged at a height of 140-170mm from the surface of the skid base.

6. The integrated skid-mounted desuperheating and pressure reducing device according to claim 5, characterized in that: The supports for the inlet and outlet pipes are sliding supports.

7. The integrated skid-mounted desuperheating and pressure reducing device according to claim 1, characterized in that: The inlet pipe is arranged with two first gate valves in the direction of steam flow, and the desuperheating water inlet is also arranged with two shut-off valves in the direction of flow.

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