Flow guide device of marine SCR (Selective Catalytic Reduction) system
By designing the upper connecting plate, the first flow divider plate, and the flow guiding device of the internal components, the problem of uneven gas distribution in the SCR system was solved, achieving stable and uniform gas flow, and improving the efficiency of catalytic reduction reaction and emission reduction effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 鸿昱新能源动力技术(江苏)有限公司
- Filing Date
- 2025-05-21
- Publication Date
- 2026-04-21
AI Technical Summary
Existing flow guiding devices are unable to achieve uniform gas distribution in SCR systems, resulting in low catalyst utilization and affecting the efficiency of catalytic reduction reaction and pollutant emission reduction.
The flow guiding device, consisting of an upper connecting plate, a first flow divider plate, a lower connecting plate, and internal components, achieves precise flow guiding and uniform distribution of gas through a specific structural layout and flow divider plate design, ensuring stable gas flow in both vertical and horizontal directions.
It significantly improves the efficiency of catalytic reduction reaction, reduces gas flow resistance, reduces energy consumption, meets environmental protection standards, and improves the emission reduction effect of ship exhaust pollutants.
Smart Images
Figure CN224141879U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flow guiding device technology, and in particular to a flow guiding device for a marine SCR system. Background Technology
[0002] In SCR systems, the uniformity and stability of the gas flow field play a decisive role in the efficiency of catalytic reduction reactions. Ideally, the gas entering the SCR reactor should be able to contact the catalyst uniformly and stably to ensure that the reaction proceeds fully. However, in actual ship operation, the exhaust gas from the engine is characterized by high temperature, high pressure, and unstable flow rate. At the same time, after the exhaust gas is discharged from the engine, it is transported into the SCR system through a series of pipelines. During this process, the gas is prone to turbulence and deflection. Existing flow guiding devices cannot completely overcome the turbulence and deflection generated by the exhaust gas during pipeline transportation, and cannot guarantee that the gas entering the SCR reactor is uniformly distributed across the entire cross-section. This leads to the catalyst not being able to fully play its role, and the reaction efficiency in some areas being low, affecting the overall pollutant emission reduction effect. For example, in some traditional flow guiding devices, the gas may concentrate on one side of the device, resulting in extremely low catalyst utilization on the other side and the conversion rate not reaching the ideal level. Therefore, we have introduced a flow guiding device for marine SCR systems. Utility Model Content
[0003] The main objective of this invention is to provide a flow guiding device for a marine SCR system, which can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A flow guiding device for a marine SCR system includes an upper connecting plate, a first diverter plate fixedly connected to the outer surface of the upper connecting plate, six first diverter plates are provided, and a lower connecting plate is fixedly connected to the other end of the six first diverter plates. An internal device is fixedly connected to the inner wall of the lower connecting plate.
[0006] The internal device includes a first connecting rod, a second diverter plate is fixedly connected to the outer surface of the first connecting rod, and six second diverter plates are provided. A connecting shaft is fixedly connected to the lower end of the first connecting rod, and a second connecting rod is fixedly connected to the outer surface of the connecting shaft. Six second connecting rods are provided, and a third diverter plate is fixedly connected to the other end of each of the second connecting rods.
[0007] Preferably, the first connecting rod is vertically fixed to the second diverter plate, and the six second diverter plates are evenly distributed in a ring around the first connecting rod.
[0008] Preferably, the connecting shaft is coaxially and fixedly connected to the first connecting rod, and the six second connecting rods are evenly distributed radially around the connecting shaft.
[0009] Preferably, the six third diverter plates are inclined at a 30-degree angle, and the included angle between adjacent third diverter plates is equal.
[0010] Preferably, all six second diverter plates are fixedly connected to the inner wall of the lower connecting plate.
[0011] Preferably, the upper connecting plate has a structure that is narrower at the top and wider at the bottom, and the structure of the upper connecting plate is the same as that of the lower connecting plate.
[0012] Preferably, the upper connecting plate is smaller than the lower connecting plate and is symmetrically distributed vertically.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. In this utility model, precise flow guidance is achieved through a unique structural layout. The upper connecting plate has a narrow upper and wide lower structure, which, together with six first diverter plates, allows the gas to naturally diffuse and initially and evenly disperse to the lower connecting plate when it enters the device. In the internal device, the six annularly distributed second diverter plates, which are vertically fixedly connected to the first connecting rod, perform initial uniform diversion of the gas in the vertical direction, and are fixedly connected to the inner wall of the lower connecting plate to further stabilize the airflow. The connecting shaft, the second connecting rod, and the third diverter plate, which is inclined at 30 degrees, provide fine guidance and angle adjustment for the gas in the horizontal direction, realizing precise flow guidance and uniform distribution of the gas in the vertical and horizontal directions. This provides a stable and uniform gas flow field for the SCR system, allowing the gas to fully contact the catalyst, significantly improving the efficiency of the catalytic reduction reaction, effectively reducing the emission of pollutants from ship exhaust, and truly meeting the increasingly stringent environmental protection standards.
[0015] 2. In this utility model, the device optimizes the flow diversion and guiding design, making the gas flow path inside the device smoother. The symmetrical design of the upper and lower connecting plates with different dimensions, combined with the reasonable connection and layout of each diversion plate and connecting rod, allows the gas to proceed in an orderly manner from initial diffusion, vertical diversion to horizontal guidance. This design avoids unnecessary turbulence and obstruction of the gas inside the device, reduces gas flow resistance, reduces the power required to propel the gas flow, thereby reducing ship energy consumption and ensuring the performance of ship engines and overall operating efficiency. Attached Figure Description
[0016] Figure 1 This is a front view structural schematic diagram of a flow guiding device for a marine SCR system according to the present invention;
[0017] Figure 2This is a bottom view of the flow guiding device of a marine SCR system according to the present invention.
[0018] Figure 3 This is a top view of the flow guiding device of a marine SCR system according to the present invention.
[0019] Figure 4 This is a schematic diagram of the internal structure of the flow guiding device of a marine SCR system according to this utility model.
[0020] In the diagram: 1. First diverter plate; 2. Upper connecting plate; 3. Lower connecting plate; 4. Internal device; 41. First connecting rod; 42. Second diverter plate; 43. Second connecting rod; 44. Connecting shaft; 45. Third diverter plate. Detailed Implementation
[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the 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 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 addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] Please see Figure 1-4 This utility model provides a technical solution:
[0025] A flow guiding device for a marine SCR system includes an upper connecting plate 2, a first diverter plate 1 fixedly connected to the outer surface of the upper connecting plate 2, six first diverter plates 1 are provided, and the other ends of the six first diverter plates 1 are fixedly connected to a lower connecting plate 3, and an internal device 4 is fixedly connected to the inner wall of the lower connecting plate 3.
[0026] The upper connecting plate 2 has a structure that is narrower at the top and wider at the bottom, and the structure of the upper connecting plate 2 is the same as that of the lower connecting plate 3;
[0027] The upper connecting plate 2 is smaller than the lower connecting plate 3 and is symmetrically distributed vertically.
[0028] In this embodiment, the internal device 4 includes a first connecting rod 41, a second diverter plate 42 fixedly connected to the outer surface of the first connecting rod 41, six second diverter plates 42 are provided, a connecting shaft 44 fixedly connected to the lower end of the first connecting rod 41, a second connecting rod 43 fixedly connected to the outer surface of the connecting shaft 44, six second connecting rods 43 are provided, and a third diverter plate 45 is fixedly connected to the other end of each second connecting rod 43. The first connecting rod 41 and the second diverter plate 42 are fixedly connected perpendicularly, the six second diverter plates 42 are evenly distributed in a ring around the first connecting rod 41, the connecting shaft 44 is fixedly connected coaxially to the first connecting rod 41, and the six second connecting rods 43 are evenly distributed radially around the connecting shaft 44. The six third diverter plates 45 are inclined at a 30-degree angle, and the included angle between adjacent third diverter plates 45 is equal. All six second diverter plates 42 are fixedly connected to the inner wall of the lower connecting plate 3.
[0029] Through the above scheme: the first connecting rod 41 is vertically fixedly connected to six annularly distributed second diverter plates 42. When gas flows into the device, the second diverter plates 42, by virtue of their vertical distribution and annular layout, initially and evenly divert the gas in the vertical direction. All six second diverter plates 42 are fixedly connected to the inner wall of the lower connecting plate 3, further stabilizing the gas flow direction and preventing airflow turbulence. The connecting shaft 44 is coaxially fixedly connected to the first connecting rod 41 to ensure the stability of power transmission. The six second connecting rods 43, which are radially and evenly distributed with the connecting shaft 44 as the center, drive the third diverter plates, which are inclined at a 30-degree angle with equal included angles at their other ends. Plate 45 provides precise horizontal guidance and angle adjustment for the gas, ensuring it flows out uniformly in a specific direction and at a specific velocity. Internal device 4 achieves precise guidance and uniform distribution of the gas in both vertical and horizontal directions, providing a stable and uniform gas flow field for the SCR system. This significantly improves the efficiency of the catalytic reduction reaction and effectively reduces pollutant emissions from ship exhaust. The rigorous connection methods and reasonable structural layout between components, such as the fixing of the second diversion plate 42 to the lower connecting plate 3 and the radial distribution of the second connecting rod 43, enhance the overall structural strength of the device. The optimized diversion and guidance design reduces gas flow resistance and energy consumption.
[0030] It should be noted that this utility model is a flow guiding device for a marine SCR system. During use, when gas enters the flow guiding device, it first contacts the upper connecting plate 2. The upper connecting plate 2 has a narrow upper and wide lower structure. This structural design allows the gas to naturally diffuse in all directions upon entering the device, initially guiding the gas flow. Six first diverting plates 1, fixedly connected to the outer surface of the upper connecting plate 2, further divert the gas, dispersing it evenly towards the lower connecting plate 3. The connection between the six first diverting plates 1, the upper connecting plate 2, and the lower connecting plate 3 forms a framework structure for initial gas flow guidance. After reaching the lower connecting plate 3, the gas enters the internal device 4 for more refined flow guidance. In the internal device 4, the first connecting rod 41 is vertically fixedly connected to six second diverting plates 42, and the six second diverting plates 42 are evenly distributed in a ring around the first connecting rod 41. This ensures that the gas is evenly divided again in the vertical direction, guaranteeing uniform gas distribution within the vertical space of the device. Simultaneously, all six second diverting plates 42 are connected to the lower connecting plate 3. The inner plate wall is fixedly connected, further enhancing the stability and uniformity of the gas in this area. As the gas continues to flow downward, the connecting shaft 44 is coaxially fixedly connected to the first connecting rod 41, and six second connecting rods 43 are evenly distributed radially around the connecting shaft 44. This drives the third diversion plate 45 fixed at its other end to function. The six third diversion plates 45 are tilted at a 30-degree angle, and the included angle between adjacent third diversion plates 45 is equal. This tilt angle and distribution can guide and fine-tune the gas in the horizontal direction, so that the gas flows out of the guiding device evenly at a specific angle and direction. This provides a uniform and stable gas flow field for the subsequent catalytic reduction reaction of the SCR system, thereby improving the catalytic reduction efficiency and reducing pollutant emissions. In the entire guiding process, the upper connecting plate 2 is smaller than the lower connecting plate 3 and is symmetrically distributed vertically. Combined with the structure of each diversion plate and connecting rod, the gas can undergo an orderly process from initial diffusion, vertical diversion to horizontal guidance inside the device, ultimately achieving efficient and uniform gas guiding.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A fairing for a marine SCR system comprising an upper connection plate (2), characterized in that: The outer surface of the upper connecting plate (2) is fixedly connected to a first diversion plate (1), and six first diversion plates (1) are provided. The other ends of the six first diversion plates (1) are fixedly connected to a lower connecting plate (3), and the inner wall of the lower connecting plate (3) is fixedly connected to an internal device (4). The internal device (4) includes a first connecting rod (41), a second diverter plate (42) is fixedly connected to the outer surface of the first connecting rod (41), six second diverter plates (42) are provided, a connecting shaft (44) is fixedly connected to the lower end of the first connecting rod (41), a second connecting rod (43) is fixedly connected to the outer surface of the connecting shaft (44), six second connecting rods (43) are provided, and a third diverter plate (45) is fixedly connected to the other end of each second connecting rod (43).
2. A flow guiding device for a marine SCR system according to claim 1, characterized in that: The first connecting rod (41) is vertically fixedly connected to the second diverter plate (42), and the six second diverter plates (42) are evenly distributed in a ring around the first connecting rod (41).
3. A flow guiding device for a marine SCR system according to claim 2, characterized in that: The connecting shaft (44) is coaxially and fixedly connected to the first connecting rod (41), and the six second connecting rods (43) are evenly distributed radially around the connecting shaft (44).
4. A flow guiding device for a marine SCR system according to claim 2, characterized in that: The six third diverter plates (45) are tilted at a 30-degree angle, and the included angle between adjacent third diverter plates (45) is equal.
5. A flow guiding device for a marine SCR system according to claim 2, characterized in that: All six second diverter plates (42) are fixedly connected to the inner wall of the lower connecting plate (3).
6. A flow guiding device for a marine SCR system according to claim 1, characterized in that: The upper connecting plate (2) has a narrow upper part and a wide lower part structure, and the structure of the upper connecting plate (2) is the same as that of the lower connecting plate (3).
7. A flow guiding device for a marine SCR system according to claim 1, characterized in that: The upper connecting plate (2) is smaller than the lower connecting plate (3) and is symmetrically distributed vertically.