Double injection desuperheater
By designing a dual-jet desuperheating and pressure reducing device, the shock wave atomization effect of steam and water in the atomization chamber is utilized. Combined with the adjustment components and linkage mechanism, the atomization and sealing problems of existing desuperheating and pressure reducing devices are solved, achieving better desuperheating and pressure reducing effect and sealing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO GAOYUAN THERMAL POWER EQUIP CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-21
Smart Images
Figure CN224534254U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of desuperheating and pressure reducing devices, and in particular to dual-jet desuperheating and pressure reducing devices. Background Technology
[0002] A desuperheater / pressure reducer is a device that reduces high-temperature, high-pressure steam to low-pressure, low-temperature steam (which can be superheated steam) that can be used by customers. It is widely used in: combined heat and power (CHP) networks for centralized heating; power plants or industrial boilers and CHP plants; steam inlets of heat exchange stations or heat exchangers; steam power inlets for lithium bromide refrigeration units; and power and heat applications in production process equipment in petrochemical, textile, papermaking, pharmaceutical, and food industries.
[0003] Taking the boiler superheater outlet as an example, the steam generated by the boiler passes through the superheater outlet to the turbine to do work. The turbine has a range requirement for the parameters of the incoming steam. If the steam parameters at the superheater outlet exceed the upper limit required by the turbine, it will damage the turbine. Therefore, a desuperheater / pressure reducer must be used to reduce the parameters to within the applicable range.
[0004] Currently, desuperheating and pressure reducing devices have the following problems:
[0005] 1. When the water pressure is lower than the pressure after steam decompression, it is not easy to be drawn in and atomized for cooling, thus failing to achieve the impact effect and atomization effect, affecting the cooling and decompression effect.
[0006] 2. High-temperature and high-pressure pressure reducing valves have difficulty sealing the valve stem and are prone to leakage. Utility Model Content
[0007] To address the aforementioned problems, achieve better impact and atomization effects, improve valve stem sealing performance, and reduce leakage, this application provides a dual-jet desuperheating and pressure-reducing device.
[0008] The dual-jet desuperheating and pressure-reducing device provided in this application adopts the following technical solution.
[0009] A dual-jet desuperheating and pressure reducing device, characterized in that it comprises: a housing, wherein the housing comprises, from one end to the other end, a steam inlet, a steam nozzle, a water chamber, an atomizing chamber and a steam outlet in sequence;
[0010] The housing is equipped with a steam regulating component for adjusting the opening area of the steam nozzle.
[0011] The water chamber is provided with a spray nozzle for spraying water into the atomizing chamber, and the housing is provided with a water inlet for supplying water to the water chamber. The water inlet is provided with a water regulating component for adjusting the opening area of the water inlet.
[0012] Steam enters the atomization chamber through the steam inlet and steam nozzle, while water enters the atomization chamber through the water spray nozzle.
[0013] By adopting the above technical solution, high-temperature and high-pressure steam enters the steam nozzle from the steam inlet and then enters the atomization chamber. When the pressure difference is greater than the critical pressure ratio and the nozzle outlet area is greater than the theoretical value, a shock wave is generated (Ralf's principle). Water enters the water chamber from the inlet and the atomization chamber from the nozzle. The two converge under high-speed conditions, generating a strong impact that atomizes the water. The water enters the nozzle outlet at the shock wave generation point, which enhances the impact and atomization effect. According to Ralf's principle, the pressure is lowest at this point, so lower-pressure water can be drawn in. After the steam and water are fully atomized in the atomization chamber to achieve the purpose of cooling, they are discharged from the steam outlet. By setting the steam regulating component, the opening area of the steam nozzle is adjusted to change the throttling degree to achieve the purpose of pressure reduction and regulation. By setting the water regulating component, the opening area of the inlet is adjusted to change the throttling degree to achieve the purpose of cooling and temperature regulation.
[0014] Optionally, the middle inner diameter of the steam nozzle is smaller than the inner diameters at both ends. The steam regulating assembly includes a steam regulating core, which is coaxially arranged with the steam nozzle. A first actuator is provided on the housing, and the first actuator drives the steam regulating core to move axially through a linkage mechanism.
[0015] By adopting the above technical solution, the steam regulating core is driven to move axially under the drive of the first actuator, thereby adjusting the opening area of the steam nozzle and changing the throttling degree to achieve the purpose of pressure reduction and pressure regulation.
[0016] Optionally, the maximum outer diameter of the steam regulating core is greater than the minimum inner diameter of the steam nozzle, and the steam regulating core is located at the other end of the steam nozzle, with one end of the steam regulating core being tapered.
[0017] Optionally, the linkage mechanism includes a top connecting rod, a swing connecting rod, and a bottom connecting rod that are hinged in sequence. The first end of the top connecting rod is hinged to the actuator and is driven to move by the actuator. The swing connecting rod is oscillatingly mounted on the housing. The tail end of the bottom connecting rod is hinged to the steam regulating core.
[0018] By adopting the above technical solution and setting up the linkage mechanism, it is convenient to arrange the first actuator and control the steam regulating core. This arrangement is beneficial to the overall sealing of the shell and prevents steam leakage.
[0019] Optionally, the steam nozzle is connected to the housing to form an annular closed space water chamber. The water regulating assembly includes a water regulating core. An inlet seat is provided inside the inlet. The water regulating core and the inlet seat are coaxially arranged. A second actuator is provided on the inlet. The water regulating core is driven by the second actuator to move axially.
[0020] By adopting the above technical solution, the water regulating core is driven to move axially under the drive of the second actuator, and the opening area of the water inlet seat is adjusted to change the throttling degree, so as to achieve the purpose of reducing and regulating the temperature. This arrangement is beneficial to the overall sealing of the shell and prevents steam leakage.
[0021] Optionally, the inner diameter of the inlet seat is conical, and the inner diameter of the end closest to the water chamber is smaller than the inner diameter of the other end.
[0022] Optionally, the water regulating core is located at the end of the inlet seat away from the water chamber, and the end of the water regulating core near the water chamber is conical, with the maximum outer diameter of the water regulating core being greater than the minimum inner diameter of the inlet seat.
[0023] By adopting the above technical solution, the inner diameter of the inlet seat is conical, and the end of the water regulating core near the water chamber is also conical. Due to the cooperation between the water regulating core and the inlet seat, the opening area can be adjusted and the throttling degree can be changed more stably.
[0024] Optionally, one end of the water chamber is conical and connected to the steam inlet, while the outer diameter of the other end of the water chamber is the same as that of the atomizing chamber.
[0025] Optionally, the housing is tubular, and the inner diameter of the steam inlet is smaller than the inner diameter of the atomizing chamber.
[0026] Optionally, a flange is provided at one end of the steam inlet, and a flange is provided at the steam outlet.
[0027] By adopting the above technical solution and using flanges, it is easy to connect with other pipes or equipment, which facilitates connection and improves applicability and sealing performance.
[0028] In summary, this application includes at least the following beneficial effects:
[0029] 1. In this application, high-temperature and high-pressure steam enters the steam nozzle from the steam inlet and then enters the atomization chamber from the steam nozzle. When the pressure difference is greater than the critical pressure ratio and the nozzle outlet area is greater than the theoretical value, a shock wave is generated (Ralf's principle). Water enters the water chamber from the inlet and the atomization chamber from the spray nozzle. The two converge under high-speed conditions, generating a strong impact, which atomizes the water. The water enters the nozzle outlet at the shock wave generation point, which enhances the impact and atomization effect. According to Ralf's principle, the pressure is lowest at this point, so lower-pressure water can be drawn in. After the steam and water are fully atomized in the atomization chamber to achieve the purpose of cooling, they are discharged from the steam outlet. By setting the steam regulating component, the opening area of the steam nozzle is adjusted to change the throttling degree to achieve the purpose of pressure reduction and pressure regulation. By setting the water regulating component, the opening area of the inlet is adjusted to change the throttling degree to achieve the purpose of cooling and temperature regulation. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a schematic diagram of a dual-jet desuperheating and pressure-reducing device.
[0032] Figure 2 This is a schematic diagram of the main structure of a dual-jet desuperheating and pressure reducing device.
[0033] Figure 3 This is a top view schematic diagram of a dual-jet desuperheating and pressure-reducing device.
[0034] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure along section line AA.
[0035] Figure 5 This is a schematic diagram of the dual-jet desuperheating and pressure reducing device from another perspective.
[0036] Figure 6 This is another structural diagram of a dual-jet desuperheating and pressure-reducing device.
[0037] Explanation of reference numerals in the attached drawings: 1. Steam inlet; 2. Steam nozzle; 3. Water chamber; 4. Atomizing chamber; 5. Steam outlet; 6. Steam regulating core; 7. First actuator; 8. Linkage mechanism; 9. Adjusting bracket; 10. Spray nozzle; 11. Water inlet; 12. Water regulating core; 13. Water inlet seat; 14. Second actuator. Detailed Implementation
[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0039] The following is in conjunction with the appendix Figures 1 to 6 This application will be described in further detail.
[0040] This application discloses a dual-jet desuperheating and pressure-reducing device.
[0041] Reference Figures 1 to 6 The dual-jet desuperheating and pressure reducing device includes a housing, which is tubular in shape.
[0042] The shell includes, from one end to the other, a steam inlet 1, a steam nozzle 2, a water chamber 3, an atomizing chamber 4, a steam outlet 5, a steam regulating component, and a water regulating component. Steam enters the atomizing chamber 4 through the steam inlet 1 and the steam nozzle 2, and water enters the atomizing chamber 4 through the water chamber 3. After the steam and water are fully atomized in the atomizing chamber 4 to achieve the purpose of cooling, they are discharged from the steam outlet 5.
[0043] The inner diameter of steam inlet 1 is smaller than the inner diameter of atomizing chamber 4. One end of steam inlet 1 is flanged, and the end of steam outlet 5 is flanged. The flanges facilitate connection with other pipes or equipment, making the connection convenient and improving applicability and sealing.
[0044] The middle inner diameter of the steam nozzle 2 is smaller than the inner diameters at both ends. The steam regulating assembly includes a steam regulating core 6, a first actuator 7, and a linkage mechanism 8. One end of the steam regulating core 6 is tapered, and the maximum outer diameter of the steam regulating core 6 is larger than the minimum inner diameter of the steam nozzle 2. The steam regulating core 6 is located at the other end of the steam nozzle 2 and is coaxially arranged with the steam nozzle 2. An adjusting bracket 9 is provided inside the atomizing chamber 4, and the steam regulating core 6 is supported on the adjusting bracket 9 and can move axially. A linkage movable cavity is provided on the housing, and the first actuator 7 is provided on the housing, located at the position of the linkage movable cavity. The first actuator 7 drives the steam regulating core 6 to move axially through the linkage mechanism 8. The linkage mechanism 8 is located inside the housing. The movable cavity of the linkage facilitates the swinging movement of the linkage mechanism 8. The linkage mechanism 8 includes a top linkage, a swing linkage, and a bottom linkage. The actuator output end enters the housing. The first end of the top linkage is hinged to the actuator, driving the top linkage to move. The tail end of the top linkage is hinged to the first end of the swing linkage. The swing linkage is swinging on the housing. The tail end of the swing linkage is hinged to the first end of the bottom linkage. The tail end of the bottom linkage is hinged to the steam regulating core 6. The linkage mechanism 8 facilitates the arrangement of the first actuator 7 and the control of the steam regulating core 6. This arrangement is beneficial to the overall sealing of the housing and prevents steam leakage.
[0045] Driven by the first actuator 7, the steam regulating core 6 moves axially, adjusting the opening area of the steam nozzle 2 and changing the throttling degree to achieve the purpose of pressure reduction and regulation.
[0046] The steam nozzle 2 is connected to the housing to form an annular closed space water chamber 3. One end of the water chamber 3 is conical and connected to the steam inlet 1. The outer diameter of the other end of the water chamber 3 is the same as the outer diameter of the atomizing chamber 4.
[0047] The water chamber 3 is provided with a spray nozzle 10 for spraying water into the atomizing chamber 4, and the housing is provided with a water inlet 11 for supplying water to the water chamber 3. The water inlet 11 is provided with a water regulating component for adjusting the opening area of the water inlet 11.
[0048] The water regulating assembly includes a water regulating core 12 and an inlet seat 13 disposed within the inlet 11. The inner diameter of the inlet seat 13 is conical, with the inner diameter at the end near the water chamber 3 being smaller than that at the other end. The water regulating core 12 is coaxially arranged with the inlet seat 13, located at the end of the inlet seat 13 furthest from the water chamber 3, and the end of the water regulating core 12 near the water chamber 3 is conical. The maximum outer diameter of the water regulating core 12 is greater than the minimum inner diameter of the inlet seat 13. Due to the cooperation between the water regulating core 12 and the inlet seat 13, the opening area is adjusted and the throttling degree is maintained more stably. A second actuator 14 is disposed on the inlet 11, and the water regulating core 12 is moved axially by the second actuator 14. Driven by the second actuator 14, the water regulating core 12 moves axially, adjusting the opening area of the inlet seat 13 to change the throttling degree, thereby achieving the purpose of reducing and regulating the temperature. This arrangement is beneficial to the overall sealing of the shell and prevents steam leakage.
[0049] High-temperature, high-pressure steam enters steam nozzle 2 from steam inlet 1 and then atomizes chamber 4. When the pressure difference exceeds the critical pressure ratio and the outlet area of steam nozzle 2 exceeds the theoretical value, a shock wave is generated (Ralf's principle). Water enters water chamber 3 from inlet 11 and atomizes chamber 4 from nozzle 10. The two converge at high speed, generating a strong impact that atomizes the water. The water enters the outlet of steam nozzle 2 at the shock wave generation point, further enhancing the impact and atomization effect. According to Ralf's principle, this point has the lowest pressure, allowing for the intake of lower-pressure water. After thorough atomization and cooling in atomizes chamber 4, the steam and water are discharged from steam outlet 5. By adjusting the steam regulating component, the opening area of steam nozzle 2 is changed to alter the throttling rate, achieving pressure reduction and regulation. Similarly, by adjusting the water regulating component, the opening area of inlet 11 is changed to alter the throttling rate, achieving cooling and temperature regulation. The sealing point between the first actuator 7 and the housing is close to steam outlet 5, i.e., the low-pressure zone, solving the problem of difficult sealing under high temperature and pressure.
[0050] In the description of this utility model, it should be understood that the terms "head end," "tail end," "one end," and "other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the term "connection" should be interpreted broadly. For example, it can refer to a mechanical connection or an electrical connection, or it can refer to the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0051] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.
Claims
1. A dual-jet desuperheating and pressure-reducing device, characterized in that, include: The housing, from one end to the other, includes a steam inlet, a steam nozzle, a water chamber, an atomizing chamber, and a steam outlet in sequence; The housing is equipped with a steam regulating component for adjusting the opening area of the steam nozzle. The water chamber is provided with a spray nozzle for spraying water into the atomizing chamber, and the housing is provided with a water inlet for supplying water to the water chamber. The water inlet is provided with a water regulating component for adjusting the opening area of the water inlet. Steam enters the atomization chamber through the steam inlet and steam nozzle, while water enters the atomization chamber through the water spray nozzle.
2. The dual-jet desuperheating and pressure-reducing device according to claim 1, characterized in that, The middle inner diameter of the steam nozzle is smaller than the inner diameters at both ends. The steam regulating assembly includes a steam regulating core, which is coaxially arranged with the steam nozzle. A first actuator is provided on the housing, and the first actuator drives the steam regulating core to move axially through a linkage mechanism.
3. The dual-jet desuperheating and pressure-reducing device according to claim 2, characterized in that, The maximum outer diameter of the steam regulating core is greater than the minimum inner diameter of the steam nozzle, and the steam regulating core is located at the other end of the steam nozzle, with one end of the steam regulating core being tapered.
4. The dual-jet desuperheating and pressure-reducing device according to claim 2, characterized in that, The linkage mechanism includes a top link, a swing link, and a bottom link that are hinged in sequence. The first end of the top link is hinged to the actuator and is driven to move by the actuator. The swing link is oscillatingly mounted on the housing. The tail end of the bottom link is hinged to the steam regulating core.
5. The dual-jet desuperheating and pressure-reducing device according to claim 2, characterized in that, The steam nozzle is connected to the housing to form an annular closed space water chamber. The water regulating assembly includes a water regulating core. An inlet seat is provided inside the inlet. The water regulating core and the inlet seat are coaxially arranged. A second actuator is provided on the inlet. The water regulating core is driven by the second actuator to move axially.
6. The dual-jet desuperheating and pressure-reducing device according to claim 5, characterized in that, The inner diameter of the inlet seat is conical, and the inner diameter of the end closest to the water chamber is smaller than that of the other end.
7. The dual-jet desuperheating and pressure-reducing device according to claim 6, characterized in that, The water regulating core is located at the end of the inlet seat away from the water chamber, and the end of the water regulating core near the water chamber is conical. The maximum outer diameter of the water regulating core is greater than the minimum inner diameter of the inlet seat.
8. The dual-jet desuperheating and pressure-reducing device according to claim 1, characterized in that, One end of the water chamber is conical and connected to the steam inlet, while the outer diameter of the other end of the water chamber is the same as that of the atomizing chamber.
9. The dual-jet desuperheating and pressure-reducing device according to claim 1, characterized in that, The shell is tubular, and the inner diameter of the steam inlet is smaller than the inner diameter of the atomizing chamber.
10. The dual-jet desuperheating and pressure-reducing device according to claim 1, characterized in that, A flange is provided at one end of the steam inlet, and a flange is provided at the other end of the steam outlet.