Vapor blocking plate with cavitation resistance at steam inlet of high-pressure heater
By designing a steam barrier structure to buffer and reduce the pressure of high-temperature and high-pressure gas, the cavitation problem at the steam inlet of the high-pressure heater was solved, achieving the effects of safe release and reduced modification costs.
Patent Information
- Application Number
- CN202520180773.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-02-05
AI Technical Summary
The steam inlet of a high-pressure heater is prone to material fatigue and corrosion under high temperature and high pressure conditions, leading to cavitation. Conventional methods are costly or require equipment modification, and design optimization is difficult.
A vapor barrier plate is designed, comprising an upper positioning hoop, an inner welded ring, an outer shell, and a vapor barrier plate. Through the combination of an inner buffer seat and an inner pressure relief seat, the pressure of high-temperature and high-pressure gas is buffered and reduced to prevent cavitation.
It effectively reduces the cavitation effect of high-pressure gas on the heater outlet, ensures the safe release of high-temperature and high-pressure gas, avoids material damage, and reduces equipment modification costs.
Smart Images
Figure CN223807179U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to high pressure heater steam inlet technical field relates to a high pressure heater steam inlet has the steam baffle with the steam erosion resistance. BACKGROUND
[0002] The shortcomings of high pressure heater steam outlet in steam erosion resistance mainly reflect in its material and design. First, since the steam outlet is directly exposed to high temperature and high pressure steam environment, the material is easy to fatigue and corrosion, which increases the surface roughness and accelerates the occurrence of cavitation. Cavitation is due to the sudden decompression of steam under high pressure, forming bubbles. When these bubbles break in the high pressure area, the high energy shock wave produced by the bubbles causes micro damage to the material surface. Long-term effect will cause local peeling and perforation of the material. Secondly, design defects, such as sudden change of flow passage cross section and uneven flow velocity distribution, will also exacerbate cavitation. These design problems lead to deterioration of fluid dynamics, increasing the possibility of cavitation.
[0003] The conventional coping methods include using steam erosion resistant materials, optimizing design to reduce flow velocity mutation and improve flow passage smoothness, and regular inspection and maintenance. However, these methods also have disadvantages. Although the use of steam erosion resistant materials can improve the steam erosion resistance, the cost is high, and the material performance may still be insufficient in high temperature and high pressure environment. Although the optimized design can reduce cavitation, it needs to modify the existing equipment, which not only consumes time and effort, but also may encounter technical difficulties in actual operation. Therefore, there is an urgent need for a steam baffle with steam erosion resistance for high pressure heater steam inlet to solve the above problems. UTILITY MODEL CONTENTS
[0004] In view of the deficiencies in the prior art, the utility model aims to provide a steam baffle with steam erosion resistance for high pressure heater steam inlet to solve the problems raised in the background art.
[0005] The utility model realizes the following technical scheme: a steam baffle with steam erosion resistance for high pressure heater steam inlet, comprising: an upper positioning hoop and an inner support pipe, a group of inner welding rings for limiting the position of flow net are arranged on the inner side of the upper positioning hoop, the inner welding rings and the upper positioning hoop are mutually welded and fixed, a group of outer shells for guiding high pressure heating steam are arranged at the lower end of the upper positioning hoop, and a group of steam baffle structures for steam erosion resistance effect are arranged inside the outer shells.
[0006] The steam baffle structure includes an inner connecting seat and an inner pressure relief seat, the inner connecting seat is in a ring structure in a top view, a plurality of inner fixing holes for connecting and fixing with the base are arranged in the inner connecting seat, a plurality of steam guide holes for guiding the high-pressure heating gas in the high-pressure transmission pipe are arranged in the inner connecting seat, and an inner buffer seat for buffering the high-pressure gas is arranged at the upper end of the inner connecting seat.
[0007] As a preferred embodiment, the inner buffer seat is a bellows structure, the lower end of the inner buffer seat is fixedly connected with the upper end of the inner connecting seat through bolts, sealing glue is arranged at the connecting position to keep sealing, and an inner supporting ring for keeping the expansion degree of the inner buffer seat is arranged at the upper end of the inner buffer seat.
[0008] As a preferred embodiment, the lower end of the inner supporting ring is fixedly connected with the upper end of the inner buffer seat through sealing glue, the outer side of the inner supporting ring is embedded and positioned with the inner side of the outer shell, and an inner pressure relief seat for releasing the high-pressure and high-temperature gas upward is arranged at the inner side of the upper end of the inner supporting ring.
[0009] As a preferred embodiment, the inner pressure relief seat is an air damping structure and is divided into an upper part and a lower part, the lower part is sealingly sleeved with the upper part, the upper end of the upper part is provided with a pressure relief head for guiding the high-temperature and high-pressure gas, when the worker guides the high-temperature and high-pressure gas in the gas inlet of the high-temperature heater into the steam baffle structure through the high-pressure transmission pipe, the high-temperature and high-pressure gas first enters the inner buffer seat through the steam guide hole, the inner buffer seat is a bellows structure, can buffer the high-temperature and high-pressure gas, and preliminarily releases the pressure of the high-temperature and high-pressure gas, then the preliminarily released high-temperature and high-pressure gas is secondarily released through the inner pressure relief seat, and the pressure of the high-temperature and high-pressure gas is further weakened, so that the high-pressure environment in the steam baffle structure is weakened, to prevent the high-pressure gas from causing cavitation effect in the steam outlet of the high-pressure heater.
[0010] As a preferred embodiment, the outer side of the inner pressure relief seat is provided with a plurality of inner steam baffle seats for limiting and supporting the inner pressure relief seat, and a plurality of inner flow guide holes for releasing the pressure and flow of the high-temperature and high-pressure gas are arranged in the inner side of the inner steam baffle seat.
[0011] As a preferred embodiment, the outer side of the inner steam baffle seat is provided with a plurality of flow guide shells for providing strength support effect to the outer side of the inner steam baffle seat, the flow guide shell and the inner steam baffle seat are an integral structure, and a plurality of air permeation holes for releasing the high-temperature and high-pressure gas are arranged in the inner side of the flow guide shell.
[0012] As a preferred implementation, each group of the air vents is fully covered and coincides with each group of the inner flow guide holes, the air vents and the inner flow guide holes are internally communicated with each other, the air vents are provided in several groups, and the inner diameters of the several groups of the air vents are sequentially increased from top to bottom, the upper end of the inner pressure relief seat is provided with a group of top support plates for limiting the top portion, when the high-temperature and high-pressure gas after the slow release is inside the steam blocking plate structure, the high-temperature and high-pressure gas is released through the several groups of the inner flow guide holes in the inner steam blocking seat of the conical structure, and the high-temperature and high-pressure gas is guided out of the air vents and the inner flow guide holes according to the pressure release degree of different levels, so that the internal pressure of the steam blocking plate structure is further reduced, and the high-temperature and high-pressure inside the steam outlet of the high-pressure heater can be safely released.
[0013] As a preferred implementation, the lower end of the outer shell is provided with a group of lower positioning hoops for positioning and supporting the lower end, and the lower end of the steam blocking plate structure is provided with a group of high-pressure transmission pipes for guiding the high-temperature and high-pressure gas.
[0014] After the above technical scheme is adopted, the beneficial effects of the present application are as follows: when the high-temperature and high-pressure gas inside the gas inlet of the high-temperature heater is guided into the steam blocking plate structure through the high-pressure transmission pipe, the high-temperature and high-pressure gas first enters the inner buffer seat through the steam guide hole, the inner buffer seat is a bellows structure, can buffer the high-temperature and high-pressure gas, and preliminarily release the pressure of the high-temperature and high-pressure gas, then the high-temperature and high-pressure gas after the preliminary release is guided to the inner pressure relief seat for secondary release, and the pressure of the high-temperature and high-pressure gas is further weakened, so that the high-pressure environment inside the steam blocking plate structure is weakened, to prevent the high-pressure gas from causing the cavitation effect inside the steam outlet of the high-pressure heater, when the high-temperature and high-pressure gas after the slow release is inside the steam blocking plate structure, the high-temperature and high-pressure gas is released through the several groups of the inner flow guide holes in the inner steam blocking seat of the conical structure, and the high-temperature and high-pressure gas is guided out of the air vents and the inner flow guide holes according to the pressure release degree of different levels, so that the internal pressure of the steam blocking plate structure is further reduced, and the high-temperature and high-pressure inside the steam outlet of the high-pressure heater can be safely released. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0016] Figure 1The utility model discloses a front oblique side overhead structure schematic diagram of a steam baffle with steam erosion resistance of high pressure heater steam inlet.
[0017] Figure 2 The utility model discloses a front side overhead structure schematic diagram of high pressure transmission pipe and inner support pipe inside of steam baffle with steam erosion resistance of high pressure heater steam inlet.
[0018] Figure 3 The utility model discloses a front side overhead structure schematic diagram of steam baffle structure inside of steam baffle with steam erosion resistance of high pressure heater steam inlet.
[0019] Figure 4 The utility model discloses a front side overhead structure schematic diagram of inner pressure relief seat of steam baffle with steam erosion resistance of high pressure heater steam inlet.
[0020] In the drawing: 100 - upper positioning hoop, 110 - inner welding fixed ring, 120 - flow net, 130 - outer cover, 140 - lower positioning hoop, 150 - high pressure transmission pipe, 160 - inner support pipe.
[0021] 13a - inner connecting seat, 13b - steam guide hole, 13c - inner buffer seat, 13d - inner support ring, 13e - flow guide shell, 13f - air hole, 13g - top support plate, 13h - inner pressure relief seat. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.
[0023] Please refer to Figures 1-4 A steam baffle with steam erosion resistance of high pressure heater steam inlet, including: upper positioning hoop 100, outer cover 130 and inner support pipe 160, the inside of upper positioning hoop 100 is equipped with a group of inner welding fixed ring 110 for limiting the position of flow net 120, and the inner welding fixed ring 110 is fixedly welded with upper positioning hoop 100, and the lower end of upper positioning hoop 100 is equipped with a group of outer cover 130 for guiding high pressure heating steam, and the inside of outer cover 130 is equipped with a group of steam baffle structure for steam erosion resistance effect.
[0024] The steam baffle structure comprises an inner connecting seat 13a, an inner buffer seat 13c and an inner pressure relief seat 13h, the inner connecting seat 13a is in a ring structure in the top view, a plurality of inner fixing holes for connecting and fixing with the base are arranged in the inner connecting seat 13a, a plurality of steam guide holes 13b for guiding the high-pressure heating gas in the high-pressure transmission pipe 150 are arranged in the inner connecting seat 13a, and the upper end of the inner connecting seat 13a is provided with the inner buffer seat 13c for buffering and relaxing the high-pressure gas.
[0025] The inner buffer seat 13c is a bellows structure, the lower end of the inner buffer seat 13c is connected and fixed with the upper end of the inner connecting seat 13a through bolts, and sealing glue is arranged at the connecting position to keep sealing, and the upper end of the inner buffer seat 13c is provided with an inner supporting ring 13d for keeping the expansion and relaxation degree of the inner buffer seat 13c.
[0026] The lower end of the inner supporting ring 13d is connected and fixed with the upper end of the inner buffer seat 13c through sealing glue, the outer side of the inner supporting ring 13d is embedded and positioned with the inner side of the outer shell 130, and the inner side of the upper end of the inner supporting ring 13d is provided with an inner pressure relief seat 13h for releasing the high-pressure and high-temperature gas upwards.
[0027] The inner pressure relief seat 13h is an air damping structure, and is divided into an upper part and a lower part, the lower part is sealingly sleeved with the upper part, and the upper end of the upper part is provided with a pressure relief head for discharging the high-temperature and high-pressure gas.
[0028] Please refer to Figures 1-4 , as the first embodiment of the utility model: when the staff guides the high-temperature and high-pressure gas in the high-temperature heater gas inlet into the steam baffle structure through the high-pressure transmission pipe 150, first, the high-temperature and high-pressure gas enters the inner buffer seat 13c through the steam guide hole 13b, the inner buffer seat 13c is a bellows structure, can buffer the high-temperature and high-pressure gas, and preliminarily release the pressure of the high-temperature and high-pressure gas, then the preliminarily released high-temperature and high-pressure gas is secondarily released through the inner pressure relief seat 13h, and the pressure of the high-temperature and high-pressure gas is further weakened, so that the high-pressure environment in the steam baffle structure is weakened, to prevent the high-pressure gas from causing the cavitation effect in the high-pressure heater outlet.
[0029] The outer side of the inner pressure relief seat 13h is provided with an inner steam baffle seat for limiting and supporting the inner pressure relief seat 13h, and the inner side of the inner steam baffle seat is provided with a plurality of inner guide holes for releasing the pressure and flow of the high-temperature and high-pressure gas.
[0030] The outer side of the inner steam baffle seat is provided with a flow guide shell 13e for providing strength support effect to the outer side, the flow guide shell 13e and the inner steam baffle seat are an integral structure, and the flow guide shell 13e is provided with a plurality of air permeable holes 13f for releasing the high-temperature and high-pressure gas.
[0031] Each group of air vents 13f is fully covered and coincides with each group of inner flow guide holes, the air vents 13f and the inner flow guide holes are internally communicated with each other, the air vents 13f are provided with several groups, and the inner diameters of the several groups of air vents 13f are sequentially increased from top to bottom, and the upper end of the inner pressure relief seat 13h is provided with a group of top supporting plates 13g for limiting the top portion.
[0032] Please refer to Figures 1-4 As a second embodiment of the utility model: based on the above-mentioned embodiment, further, when the high-temperature and high-pressure gas after slow release is inside the steam baffle structure, the high-temperature and high-pressure gas is released through the several groups of inner flow guide holes inside the inner steam baffle of the conical structure, and the air vents 13f and the inner flow guide holes with different inner diameters are guided out according to the pressure release degree of different levels, so that the internal pressure of the steam baffle structure is further reduced, and the high-temperature and high-pressure inside the steam outlet of the high-pressure heater can be safely released.
[0033] The lower end of the outer shell 130 is provided with a group of lower positioning hoops 140 for positioning and supporting the lower end, and the lower end of the steam baffle structure is provided with a group of high-pressure transmission pipes 150 for guiding the high-temperature and high-pressure gas into the high-pressure transmission pipes 150, and the inner side of the high-pressure transmission pipes 150 is provided with a group of inner support pipes 160 for stably transmitting the high-temperature and high-pressure gas.
[0034] The above-mentioned is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A steam baffle with anti-cavitation performance for a high-pressure heater inlet, comprising: The upper positioning hoop (100), the outer cover (130) and the support pipe (160) are characterized in that: a group of inner welding rings (110) for limiting the position of the flow-through net (120) are arranged on the inner side of the upper positioning hoop (100), the inner welding ring (110) and the upper positioning hoop (100) are welded and fixed with each other, and a group of outer cover shells (130) for guiding high-pressure heating steam are arranged at the lower end of the upper positioning hoop (100), and the inner side of the outer cover shell (130) is provided with a group of steam baffle structures for resisting steam erosion effect; The steam baffle structure includes an inner connecting seat (13a), an inner buffer seat (13c) and an inner pressure relief impact seat (13h), the inner connecting seat (13a) has a ring structure in a top view cross section, a plurality of inner fixing holes for connecting and fixing with the base are arranged in the inner connecting seat (13a), a group of steam guide holes (13b) for guiding the high-pressure heating gas in the high-pressure transmission pipe (150) are arranged in the inner connecting seat (13a), and a group of inner buffer seats (13c) for buffering and relaxing the high-pressure gas are arranged at the upper end of the inner connecting seat (13a).
2. The steam baffle with anti-cavitation performance for the inlet of high-pressure heater according to claim 1, characterized in that: The inner buffer seat (13c) is a bellows structure, the lower end of the inner buffer seat (13c) is connected and fixed with the upper end of the inner connecting seat (13a) through bolts, a sealing glue is arranged at the connection position to keep sealing, and a group of inner support rings (13d) for keeping the stretching and relaxing degree of the inner buffer seat (13c) are arranged at the upper end of the inner buffer seat (13c).
3. The steam baffle with anti-cavitation performance for the inlet of the high-pressure heater according to claim 2, characterized in that: The lower end of the inner support ring (13d) is connected and fixed with the upper end of the inner buffer seat (13c) through a sealing glue, the outer side of the inner support ring (13d) is embedded and positioned with the inner side of the outer cover shell (130), and a group of inner pressure relief impact seats (13h) for releasing the high-pressure and high-temperature gas upward are arranged at the inner side of the upper end of the inner support ring (13d).
4. The steam baffle with anti-cavitation performance for the inlet of high-pressure heater according to claim 3, characterized in that: The inner pressure relief impact seat (13h) is an air damping structure and is divided into an upper part and a lower part, the lower part is in position sealing sleeve connection with the upper part, and a pressure relief head for discharging the high-temperature and high-pressure gas is arranged at the upper end of the upper part.
5. The steam baffle with anti-cavitation performance for the inlet of high-pressure heater according to claim 4, characterized in that: A group of inner steam baffle seats for supporting the outer side of the inner pressure relief impact seat (13h) are arranged at the outer side of the inner pressure relief impact seat (13h), and a plurality of inner guide holes for releasing the high-temperature and high-pressure gas are arranged at the inner side of the inner steam baffle seat.
6. A steam baffle with anti-cavitation performance for the inlet of a high-pressure heater according to claim 5, characterized in that: A group of flow guide shells (13e) for providing strength support effect to the outer side of the inner steam baffle seat are arranged at the outer side of the inner steam baffle seat, the flow guide shell (13e) and the inner steam baffle seat are an integral structure, and a plurality of air permeation holes (13f) for releasing the high-temperature and high-pressure gas are arranged in the flow guide shell (13e).
7. A steam baffle with anti-cavitation performance for the inlet of a high-pressure heater according to claim 6, characterized in that: Each group of the air permeation holes (13f) completely covers and coincides with each group of the inner guide holes, the air permeation holes (13f) and the inner guide holes are in communication with each other, a plurality of groups of the air permeation holes (13f) are arranged, the inner diameters of the plurality of groups of the air permeation holes (13f) increase from top to bottom, and a group of top support plates (13g) for limiting the top of the inner pressure relief impact seat (13h) are arranged at the upper end of the inner pressure relief impact seat (13h).
8. The steam baffle with anti-cavitation performance for the inlet of high-pressure heater according to claim 1, characterized in that: The lower end of the outer shell (130) is provided with a group of lower positioning hoops (140) for positioning and supporting the lower end thereof, and the lower end of the steam blocking plate structure is provided with a group of high-pressure transmission pipes (150) for guiding the high-temperature and high-pressure gas into the steam blocking plate structure, and the inner side of the high-pressure transmission pipes (150) is provided with a group of inner support pipes (160) for stably transmitting the high-temperature and high-pressure gas.