Anti-surge valve
By designing anti-swelling valves in high-temperature and high-pressure water vapor compressors, using structures such as split sleeves, injection holes, pressure reduction cylinders and atomization nozzles, the temperature and pressure reduction of the reflux steam is achieved, and the high temperature and high pressure caused by surge is solved. Problem, improving unit safety performance and reducing costs.
Patent Information
- Application Number
- CN202411217100.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2024-12-20
AI Technical Summary
During operation, high-temperature and high-pressure water vapor compressors are prone to steam return due to surge, which in turn causes rapid increase in pressure and temperature, affecting unit safety. The existing technology solves the problem by increasing the equipment level or adding temperature reduction and pressure reduction devices, but it has increased cost.
An anti-swelling valve is designed, including a shunt sleeve, valve core, pressure reducing chamber, pressure reducing cylinder and cooling component. The initial pressure reduction of steam is achieved through the injection hole and pore. The cooling component such as an atomizing nozzle is used to further cool down. Combined with the slope structure to prevent liquefaction, the reflux steam can be reduced and the temperature and pressure reduction is achieved.
It effectively prevents high-temperature and high-pressure steam return caused by surge, reduces the pressure and temperature of the inlet pipeline, improves the overall safety performance of the unit, reduces the safety margin during design, and reduces the cost.
Smart Images
Figure CN119163630A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of high-temperature and high-pressure water vapor compressors, and in particular to an anti-surge valve. Background Art
[0002] When the output pressure of a centrifugal compressor is constant and the flow rate is reduced to a certain value, surge will occur. In order to prevent surge, the flow rate must not enter the surge zone. When the resistance of the pipeline system increases during the operation of the centrifugal compressor, the flow rate will decrease and may drop below the allowable value. The task of the anti-surge valve is to increase the flow rate through the centrifugal compressor through the anti-surge valve when the flow rate drops to a certain safety lower limit to prevent it from entering the surge zone.
[0003] Especially for high-temperature and high-pressure steam compressors, the difference between their inlet and outlet temperatures and pressures is large. If surge occurs frequently during the operation of the unit, the high-temperature and high-pressure steam at the compressor outlet will flow back to the inlet through the frequently operated anti-surge valve, which may cause its pressure and temperature to rise rapidly. In extreme cases, it may exceed the limit value, thus affecting the safety of the unit.
[0004] In response to this situation, when designing conventional high-temperature and high-pressure steam compressors, the pressure and temperature levels of their inlet pipes, valves and related accessories are increased to leave sufficient safety margins, or a cooling and pressure reduction device is added after the anti-surge valve. Both methods increase the cost of the unit to varying degrees. Summary of the invention
[0005] In view of the above problems in the prior art, the present invention proposes an anti-surge valve, which can reduce the temperature and pressure of the reflux steam while achieving backflow anti-surge, thereby improving the overall safety performance of the high-temperature and high-pressure water vapor compressor.
[0006] Specifically, the present invention proposes an anti-surge valve, which is suitable for a high-temperature and high-pressure water vapor compressor. The anti-surge valve comprises:
[0007] Splitting sleeve;
[0008] A valve core is inserted into the bottom of the diverter sleeve;
[0009] A decompression chamber is arranged inside the diverter sleeve and located at the top of the valve core, the top of the decompression chamber is closed, and a plurality of injection holes are arranged on the circumferential outer wall of the decompression chamber;
[0010] A decompression cylinder is arranged in the decompression chamber, the top of the decompression cylinder is upwardly attached to the inner wall of the top of the decompression chamber, the bottom of the decompression cylinder is communicated with the valve core, and a plurality of holes are arranged on the circumferential outer wall of the decompression cylinder;
[0011] A cooling component, disposed in the valve core, for reducing the temperature of the steam in the valve core;
[0012] Among them, after the steam enters the diverter sleeve from the outside, it enters the decompression chamber through the injection hole, and then enters the decompression cylinder through the pore. The steam in the decompression cylinder enters the valve core downward, and is discharged outward from the bottom of the valve core after being cooled by the cooling component.
[0013] According to an embodiment of the present invention, the plurality of injection holes are evenly distributed on the circumferential outer wall of the decompression chamber, and the apertures of the plurality of injection holes are the same.
[0014] According to an embodiment of the present invention, the axes of two or more of the injection holes intersect, so that the steam passing through the two or more injection holes collides with each other to generate interference.
[0015] According to an embodiment of the present invention, the bottom of the decompression chamber forms a sloped structure.
[0016] According to an embodiment of the present invention, the bottom of the decompression cylinder forms a sloped structure, which cooperates with the sloped structure at the bottom of the decompression chamber.
[0017] According to one embodiment of the present invention, the lowest part of the sloped structure of the decompression chamber has an overflow port, and the overflow port is connected to the decompression chamber and the diverter sleeve.
[0018] According to one embodiment of the present invention, the decompression chamber, the decompression cylinder and the valve core are coaxial.
[0019] According to an embodiment of the present invention, the temperature reduction component includes an atomizing nozzle.
[0020] According to one embodiment of the present invention, the atomizing nozzle is arranged on a pipeline communicating with the outside of the valve core to allow external cooling water to pass through, and the atomizing nozzle is used to atomize the cooling water.
[0021] According to an embodiment of the present invention, the diameters of the injection holes and the pores are set according to the magnitude of the steam decompression by the decompression chamber.
[0022] The present invention provides an anti-surge valve, which reduces the pressure of the reflux steam by setting a decompression chamber for secondary decompression and setting a cooling component to reduce the steam temperature, thereby improving the overall safety performance of the high-temperature and high-pressure water vapor compressor.
[0023] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings are included to provide further explanation of the present invention, and are incorporated into and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with the description serve to explain the principle of the present invention.
[0025] In the attached figure:
[0026] Figure 1 A schematic structural diagram of an anti-surge valve according to an embodiment of the present invention is shown.
[0027] Figure 2 yes Figure 1 Schematic diagram of the structure of the diverter sleeve.
[0028] Figure 3 yes Figure 1 Schematic diagram of the structure of the pressure reducing cylinder.
[0029] The above drawings include the following reference numerals:
[0030] Anti-surge valve 100
[0031] Diverter sleeve 101
[0032] Valve core 102
[0033] Cooling component 103
[0034] Decompression chamber 104
[0035] Injection hole 105
[0036] Decompression cylinder 106
[0037] Pore 107
[0038] Slope structure 108
[0039] Overflow port 109
[0040] Pipeline 110 DETAILED DESCRIPTION
[0041] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.
[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually merely illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0045] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0046] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.
[0047] Figure 1 A schematic structural diagram of an anti-surge valve according to an embodiment of the present invention is shown. Figure 2 yes Figure 1 Schematic diagram of the structure of the diverter sleeve. Figure 3 yes Figure 1 Schematic diagram of the structure of the decompression cylinder in the figure. As shown in the figure, an anti-surge valve 100 suitable for a high-temperature and high-pressure water vapor compressor mainly includes a diverter sleeve 101, a valve core 102, a cooling component 103 and a decompression chamber 104. The top of the diverter sleeve 101 is open and connected upward to the pipeline with high-temperature and high-pressure steam. The valve core 102 is inserted into the bottom of the diverter sleeve 101. A part of the valve core 102 extends upward into the diverter sleeve 101, and the other part extends downward from the bottom of the diverter sleeve 101. The decompression chamber 104 is arranged in the diverter sleeve 101 and is located at the top of the valve core 102. The top of the decompression chamber 104 is closed to prevent high-temperature and high-pressure steam from being directly poured into the top of the decompression chamber. A plurality of injection holes 105 are provided on the circumferential outer wall of the decompression chamber 104. A decompression cylinder 106 is provided in the decompression chamber 104. The top of the decompression cylinder 106 is attached to the inner wall of the top of the decompression chamber 104, and the bottom thereof is connected to the inside of the valve core 102. A plurality of pores 107 are provided on the circumferential outer wall of the decompression cylinder 106. A cooling component 103 is provided in the valve core 102. The cooling component 103 is used to reduce the temperature of the steam in the valve core 102.
[0048] During the use of the anti-surge valve 100, as shown in the figure, high-temperature and high-pressure steam enters the diverter sleeve 101 from the top of the diverter sleeve 101 through the pipeline. In the diverter sleeve 101, the steam reaches the top of the decompression chamber 104, changes the flow direction, spreads to the surroundings, and is uniformly sprayed into the decompression chamber 104 from the injection hole 105 of the decompression chamber 104, thereby achieving the initial decompression of the high-temperature and high-pressure steam. The steam that has undergone the initial decompression enters the decompression cylinder 106 through the pores 107 on the circumferential outer wall of the decompression cylinder 106. At this time, a large amount of steam pressure is converted into kinetic energy, which greatly reduces the steam pressure. The high-temperature and high-pressure steam is decompressed by the decompression chamber 104 and the decompression cylinder 106. The high-temperature decompression steam formed in the decompression cylinder 106 enters the valve core 102 downward, and is discharged from the bottom of the valve core 102 after being cooled by the cooling component 103.
[0049] The anti-surge valve 100 provided by the present invention has the dual functions of backflow anti-surge and temperature and pressure reduction. It can convert high-temperature and high-pressure steam into temperature and pressure-reduced steam, and the temperature and pressure-reduced steam flows back to the inlet pipeline of the high-temperature and high-pressure water vapor compressor, thereby reducing the possibility of rapid increase in steam pressure and temperature in the inlet pipeline, and improving the safety performance of the overall operation of the unit. When designing the inlet pipeline, valves and related accessories of the high-temperature and high-pressure water vapor compressor, it is also possible to consider reducing its safety margin, thereby effectively reducing costs.
[0050] In one embodiment, a plurality of injection holes 105 are evenly distributed on the circumferential outer wall of the decompression chamber 104, and the apertures of the plurality of injection holes 105 are the same, so that the steam is uniformly injected into the decompression chamber 104 from the injection holes 105 in the transverse direction. Preferably, the axes of two or more injection holes 105 intersect, so that the steam passing through the two or more injection holes 105 interfere with each other, reducing their flow rate and pressure. Through the precise design and reasonable arrangement of the injection holes 105 on the circumferential outer wall of the diverter sleeve 101, the two or more steam streams passing through the injection holes 105 impact each other, offsetting part of the impact pressure of the steam flow, and achieving initial decompression.
[0051] Preferably, a slope structure 108 is formed at the bottom of the decompression chamber 104. The purpose of this design is to prevent the steam in the decompression chamber 104 from liquefying to form water when the anti-surge valve 100 does not operate for a long time. If the water enters the valve core 102, the anti-surge valve 100 will run with liquid, affecting its working efficiency. The design of the slope structure 108 allows the liquefied steam to converge to the bottom of the slope along the slope at the bottom of the slope structure 108, reducing the possibility of it entering the decompression cylinder 106, and preventing water from entering the valve core 102 through the decompression cylinder 106.
[0052] Preferably, the bottom of the decompression cylinder 106 forms a sloped structure, which cooperates with the sloped structure 108 at the bottom of the decompression chamber 104. The bottom structures of the decompression chamber 104 and the decompression cylinder 106 are consistent, which is convenient for assembly.
[0053] Preferably, the lowest part of the sloped structure 108 of the decompression chamber 104 has an overflow port 109. The overflow port 109 communicates the interior of the decompression chamber 104 with the interior of the diverter sleeve 101. The liquefied steam converges to the bottom of the slope along the slope at the bottom of the sloped structure 108 of the decompression chamber 104, and flows into the diverter sleeve 101 through the overflow port. Since the bottom of the diverter sleeve 101 is lower than the bottom of the decompression chamber 104, water converges at the bottom of the diverter sleeve 101 and does not enter the decompression chamber 104, further avoiding the possibility of water entering the valve core 102 through the decompression cylinder 106.
[0054] Preferably, the decompression chamber 104 , the decompression cylinder 106 and the valve core 102 are coaxial.
[0055] Preferably, the cooling component 103 includes an atomizing nozzle. More preferably, the atomizing nozzle is arranged on a pipeline connected to the outside of the valve core to allow external cooling water to pass through, and the atomizing nozzle is used to atomize the cooling water. Since the high-temperature reduced-pressure steam passing through the pressure-reducing cylinder 106 has the characteristic of high turbulence, the atomized cooling water is mixed with it at this time, which can achieve a rapid cooling effect.
[0056] Preferably, according to engineering design requirements, the aperture sizes of the injection holes 105 of the decompression chamber 104 and the pores 107 of the decompression cylinder 106 are set according to the magnitude of the steam decompression by the decompression chamber 104 to meet the decompression requirements under different working conditions.
[0057] The present invention provides an anti-surge valve, which can reduce the temperature and pressure of the refluxed high-temperature and high-pressure steam while taking into account the anti-surge of the reflux of the high-temperature and high-pressure water vapor compressor. Even if the unit surges frequently, causing a large flow of high-temperature and high-pressure steam to flow into the compressor inlet in a short time, it will not cause over-temperature and over-pressure, thereby ensuring the safety of the unit. The anti-surge valve has the following advantages:
[0058] The initial pressure reduction of high-temperature and high-pressure steam is achieved through the injection holes on the diverter sleeve;
[0059] After the initial decompression, the steam enters the decompression cylinder through the holes on the decompression cylinder to meet the decompression requirements; The atomizing nozzle provides atomized cooling water mixed with high-temperature and low-pressure steam to achieve rapid cooling;
[0060] The sloped structure designed at the bottom of the decompression chamber can prevent the anti-surge valve from running with liquid;
[0061] When designing the inlet pipes, valves and related accessories of a high-temperature and high-pressure steam compressor, the safety margin can be reduced to reduce costs.
[0062] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.
Claims
1. An anti-surge valve, suitable for a high-temperature and high-pressure water vapor compressor, the anti-surge valve comprising: Splitting sleeve; A valve core is inserted into the bottom of the diverter sleeve; A decompression chamber is arranged inside the diverter sleeve and located at the top of the valve core, the top of the decompression chamber is closed, and a plurality of injection holes are arranged on the circumferential outer wall of the decompression chamber; A decompression cylinder is arranged in the decompression chamber, the top of the decompression cylinder is upwardly attached to the inner wall of the top of the decompression chamber, the bottom of the decompression cylinder is communicated with the valve core, and a plurality of holes are arranged on the circumferential outer wall of the decompression cylinder; A cooling component, disposed in the valve core, for reducing the temperature of the steam in the valve core; Among them, after the steam enters the diverter sleeve from the outside, it enters the decompression chamber through the injection hole, and then enters the decompression cylinder through the pore. The steam in the decompression cylinder enters the valve core downward, and is discharged outward from the bottom of the valve core after being cooled by the cooling component.
2. The anti-surge valve according to claim 1, characterized in that: The plurality of injection holes are evenly distributed on the circumferential outer wall of the decompression chamber, and the apertures of the plurality of injection holes are the same.
3. The anti-surge valve according to claim 2, characterized in that: The axes of two or more of the injection holes intersect with each other, so that the steam passing through the two or more injection holes collides with each other to generate interference.
4. The anti-surge valve according to claim 1, characterized in that: The bottom of the decompression chamber forms a slope structure.
5. The anti-surge valve according to claim 4, characterized in that: The bottom of the decompression cylinder forms a sloped structure, which cooperates with the sloped structure at the bottom of the decompression chamber.
6. The anti-surge valve according to claim 4, characterized in that: The lowest part of the sloped structure of the decompression chamber is provided with an overflow port, and the overflow port is connected with the decompression chamber and the diversion sleeve.
7. The anti-surge valve according to claim 1, characterized in that: The decompression chamber, the decompression cylinder and the valve core are coaxial.
8. The anti-surge valve according to claim 1, characterized in that: The cooling component comprises an atomizing nozzle.
9. The anti-surge valve according to claim 8, characterized in that: The atomizing nozzle is arranged on a pipeline communicating with the outside of the valve core to allow external cooling water to flow in, and the atomizing nozzle is used to atomize the cooling water.
10. The anti-surge valve according to claim 1, characterized in that: The aperture sizes of the injection holes and the pores are set according to the magnitude of the steam decompression by the decompression chamber.