A mesh belt kiln cooling structure for SCR catalyst

Abstract

The utility model relates to the technical field of SCR catalyst production equipment discloses a net belt kiln cooling structure for SCR catalyst, including the conveyer belt, the conveyer belt side fixedly connected with the net belt kiln, the inner wall of net belt kiln is provided with cooling assembly, the cooling assembly includes a plurality of cooling pipes, a plurality of cooling pipes are located in the inner wall of net belt kiln, the inner wall top of net belt kiln is provided with hard aluminium silicate fibre board, a plurality of cooling pipes both ends are through hard aluminium silicate fibre board and extend to the top of net belt kiln, the top of net belt kiln is provided with connecting pipe no. One, air inlet pipe and air outlet pipe, the both sides of connecting pipe no. One top are fixedly connected with the communication piece no. One and the communication piece no. Two respectively. In the utility model, through setting cooling assembly in the top of net belt kiln, and installing hard aluminium silicate fibre board in the top of kiln inner wall, the effect that the catalyst is indirectly cooled steadily and uniformly is reached, and the reliability and stability of kiln cooling process are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of SCR catalyst production equipment, and in particular to a mesh belt kiln cooling structure for SCR catalysts. Background Technology

[0002] In the continuous development and widespread application of SCR denitrification technology, catalysts, as the core element for achieving efficient denitrification, have a crucial impact on the quality of the final product at every stage of their production process. The mesh belt kiln, as the core equipment for SCR catalyst calcination and forming, not only undertakes the important task of inducing physicochemical changes in the catalyst body through high-temperature calcination, but its cooling process is also a critical step that determines catalyst performance. The rationality of the cooling structure directly affects whether the catalyst can maintain a stable physical structure, chemical activity, and overall performance during the cooling process. Therefore, developing efficient and stable mesh belt kiln cooling structures has become an important issue for improving the production quality of SCR catalysts.

[0003] Existing SCR catalyst mesh belt kilns primarily employ a mechanical structure combining natural air cooling and forced air supply. The technical principle involves installing multiple axial flow fans in the kiln cooling section. These fans draw in outside cold air, which is then blown vertically onto the catalyst substrate on the mesh belt through vents in the kiln sidewall. The airflow carries away the catalyst's heat, achieving cooling. Simultaneously, the mesh belt continuously transports the catalyst at a constant speed, allowing the substrate to experience a temperature gradient as it passes through different cooling zones. Some systems also include an exhaust system at the end of the cooling section to accelerate the removal of hot air and enhance the cooling effect.

[0004] However, in existing technologies, the cooling process involves directly blowing cold air onto the high-temperature catalyst blank, which can easily lead to uneven distribution of cold air within the kiln and a lack of precise control over the cooling rate. The high-temperature honeycomb SCR catalyst blank often experiences excessively rapid cooling due to sudden exposure to the low-temperature airflow. At the same time, the difference in the degree of cooling in different parts causes uneven cooling, which can easily lead to thermal stress concentration inside the blank, resulting in product cracking and seriously affecting the finished product quality and production stability of the catalyst. To address these issues, a mesh belt kiln cooling structure for SCR catalysts is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a mesh belt kiln cooling structure for SCR catalysts, which aims to improve the problems of energy waste caused by heat loss upwards in traditional kilns and catalyst cracking caused by excessively rapid or uneven cooling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A mesh belt kiln cooling structure for SCR catalyst includes a conveyor belt, a mesh belt kiln fixedly connected to one side of the conveyor belt, and a cooling component provided on the inner wall of the mesh belt kiln.

[0008] The cooling assembly includes multiple cooling pipes located on the inner wall of the mesh belt kiln. A rigid aluminosilicate fiberboard is installed on the top of the inner wall of the mesh belt kiln. Both ends of the multiple cooling pipes penetrate the rigid aluminosilicate fiberboard and extend to the top of the mesh belt kiln. A connecting pipe, an air inlet pipe, and an air outlet pipe are installed on the top of the mesh belt kiln. A connecting block 1 and a connecting block 2 are fixedly connected to the top two sides of the connecting pipe 1, respectively. The two sides of the connecting pipe 1 are connected to the air inlet pipe and the air outlet pipe through the connecting pipes, respectively.

[0009] As a further description of the above technical solution:

[0010] The bottom of each of the connecting pipes, the inlet pipe, and the outlet pipe is fixedly connected to multiple support blocks, and the bottom of the multiple support blocks is fixedly connected to the top of the mesh belt kiln.

[0011] The above technical solution achieves the desired fixation of the connecting pipe, the inlet pipe, and the outlet pipe.

[0012] As a further description of the above technical solution:

[0013] A suction fan is fixedly connected to the top of the mesh belt kiln, and the output end of the suction fan is connected to one end of the connecting pipe.

[0014] The above technical solution achieves the effect of drawing cold air into the interior of the connecting pipe.

[0015] As a further description of the above technical solution:

[0016] The rigid aluminum silicate fiberboard is fixedly connected to the top of the inner wall of the mesh belt kiln by anchors, and each cooling pipe is provided with a guide component inside.

[0017] The above technical solution achieves the insulation effect on the top of the inner wall of the mesh belt kiln.

[0018] As a further description of the above technical solution:

[0019] The guiding assembly includes multiple guide plates one, two, three and micro-protruding ribs, with the outer walls of the multiple guide plates one, two and three and micro-protruding ribs fixedly connected to the inner wall of the cooling pipe.

[0020] The above technical solution achieves the effect of uniform gas distribution inside the cooling pipe.

[0021] As a further description of the above technical solution:

[0022] The multiple guide vanes are inclined toward the bottom of the inner wall of the cooling pipe and at an angle of 8° with the bottom axis of the cooling pipe, in order to guide the airflow toward the bottom of the inner wall of the cooling pipe.

[0023] The above technical solution achieves the effect of guiding the direction of gas flow.

[0024] As a further description of the above technical solution:

[0025] The multiple guide plates are inclined to the top of the inner wall of the cooling pipe and at an angle of 5° between them and the bottom axis of the cooling pipe. The multiple guide plates are parallel to each other and the bottom axis of the cooling pipe.

[0026] The above technical solution achieves the effect of suppressing gas turbulence.

[0027] As a further description of the above technical solution:

[0028] The multiple micro-protruding ribs are vertically distributed between the bottom axis of the cooling pipe and the cooling pipe, which is used to disrupt the airflow at the bottom of the inner wall of the cooling pipe.

[0029] The above technical solution achieves the goal of disturbing and disrupting the airflow that is tightly attached to the bottom of the inner wall of the cooling pipe.

[0030] This utility model has the following beneficial effects:

[0031] 1. In this utility model, by setting a cooling component at the top of the mesh belt kiln and adding a rigid aluminum silicate fiber plate to the top of the inner wall of the kiln, the catalyst is stably and uniformly cooled indirectly. This solves the problems of energy waste caused by heat loss upwards in traditional kilns and catalyst cracking caused by excessively fast or uneven cooling, thereby enhancing the overall thermal efficiency of the kiln and the reliability and stability of the cooling process.

[0032] 2. In this utility model, by precisely setting a variety of guide plates and micro-protruding ribs inside the cooling pipe, the cooling airflow inside the pipe is precisely guided and comprehensively optimized, which solves the problem of poor heat exchange efficiency caused by airflow stratification and the boundary layer effect of wall stagnation, and enhances the heat exchange effect between cold air and pipe wall, thereby ensuring deep and uniform cooling of the catalyst. Attached Figure Description

[0033] Figure 1 This is a three-dimensional schematic diagram of a mesh belt kiln cooling structure for an SCR catalyst proposed in this utility model;

[0034] Figure 2 This is a schematic diagram of the internal structure of a mesh belt kiln for cooling SCR catalysts proposed in this utility model.

[0035] Figure 3 This is a schematic diagram of the top structure of a mesh belt kiln cooling structure for an SCR catalyst proposed in this utility model;

[0036] Figure 4 This is a schematic diagram of the support block structure of a mesh belt kiln cooling structure for SCR catalyst proposed in this utility model;

[0037] Figure 5 This is a schematic diagram of the internal structure of the cooling pipe of a mesh belt kiln cooling structure for SCR catalyst proposed in this utility model.

[0038] Figure 6 This is a schematic diagram of the micro-rib structure of a mesh belt kiln cooling structure for SCR catalyst proposed in this utility model.

[0039] Legend:

[0040] 1. Conveyor belt; 2. Mesh belt kiln; 3. Connecting pipe one; 4. Connecting block one; 5. Connecting block two; 6. Air inlet pipe; 7. Cooling pipe; 8. Connecting pipe; 9. Support block; 10. Air outlet pipe; 11. Guide plate one; 12. Guide plate two; 13. Guide plate three; 14. Micro-convex ribs; 15. Fan; 16. Hard aluminum silicate fiberboard. Detailed Implementation

[0041] 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.

[0042] Reference Figures 1-4 The present invention provides an embodiment of a mesh belt kiln cooling structure for SCR catalyst, comprising a conveyor belt 1, with a mesh belt kiln 2 fixedly connected to one side of the conveyor belt 1. The conveyor belt 1 is used to carry and uniformly transport the SCR catalyst to be cooled, and works in conjunction with the mesh belt kiln 2 located above it to perform continuous cooling operations, achieving the effect of efficient and automated production. The inner wall of the mesh belt kiln 2 is provided with a cooling component, which is used to perform core cooling treatment on the catalyst inside the kiln.

[0043] The cooling assembly includes multiple cooling pipes 7 located on the inner wall of the mesh belt kiln 2. These cooling pipes 7 serve as channels for cold air flow and key carriers for heat exchange. A rigid aluminosilicate fiberboard 16 is installed on the top of the inner wall of the mesh belt kiln 2. This board effectively blocks the high temperature inside the kiln from dissipating to the top, achieving the effects of heat insulation and improving the thermal efficiency of the kiln. Both ends of the multiple cooling pipes 7 penetrate the rigid aluminosilicate fiberboard 16 and extend to the top of the mesh belt kiln 2.

[0044] The top of the mesh belt kiln 2 is equipped with a connecting pipe 3, an air inlet pipe 6, and an air outlet pipe 10. These pipes, together with connecting block 4, connecting block 5, and connecting pipe 8, are used to construct a complete and efficient airflow distribution and recovery path. Connecting block 4 and connecting block 5 are fixedly connected to the top two sides of the connecting pipe 3, and the two sides of the connecting pipe 3 are connected to the air inlet pipe 6 and the air outlet pipe 10 through the connecting pipe 8. Multiple support blocks 9 are fixedly connected to the bottom of the connecting pipe 3, the air inlet pipe 6, and the air outlet pipe 10. The bottom of the multiple support blocks 9 is fixedly connected to the top of the mesh belt kiln 2. The support blocks 9 are used to firmly support and fix the entire top pipe components, ensuring the structural stability of the equipment during operation.

[0045] A suction fan 15 is fixedly connected to the top of the mesh belt kiln 2. The output end of the suction fan 15 is connected to one end of the connecting pipe 3. The suction fan 15 is used to provide a continuous and strong source of cold air for the entire cooling component. The rigid aluminum silicate fiberboard 16 is fixedly connected to the top of the inner wall of the mesh belt kiln 2 through anchors. The anchors are used to ensure that the fiberboard remains stable for a long time under high temperature and airflow scouring, which enhances the safety and durability of the equipment. Each cooling pipe 7 is equipped with a guide component. The guide component is used to finely control the flow of cold air entering the pipe, which solves the problem of low heat exchange efficiency caused by uneven airflow distribution.

[0046] Reference Figure 5 and Figure 6 The guiding component includes multiple guide plates 11, 12, 13 and micro-ribs 14. The outer walls of the multiple guide plates 11, 12 and 13 and micro-ribs 14 are fixedly connected to the inner wall of the cooling pipe 7. The multiple guide plates 11 are inclined towards the bottom of the inner wall of the cooling pipe 7 and the angle between them and the bottom axis of the cooling pipe 7 is 8°. This is used to actively guide the airflow above the pipe and press it towards the bottom of the pipe wall for supplementation, thereby enhancing the airflow velocity and flow rate in the bottom heat exchange area. The multiple guide plates 22 are inclined towards the top of the inner wall of the cooling pipe 7 and the angle between them and the bottom axis of the cooling pipe 7 is 5°. This is used to cleverly suppress the turbulence caused by excessive downward pressure of the airflow, thereby achieving the control effect of balancing the flow velocity difference between the center of the pipe and the wall and stabilizing the overall flow state.

[0047] Multiple guide vanes 13 are parallel to each other with the bottom axis of the cooling pipe 7. They are used to finally regulate and sort the airflow after the first two stages of regulation, ensuring that the airflow can flow out smoothly and evenly in the horizontal direction and avoid outlet deflection. Multiple micro-protruding ribs 14 are vertically distributed with the bottom axis of the cooling pipe 7. They are used to efficiently break and peel off the airflow stagnation boundary layer that is tightly attached to the bottom of the pipe wall through physical disturbance. This solves the technical problem that the presence of this boundary layer seriously hinders heat transfer and enhances the contact heat exchange efficiency between the pipe wall and the cold air.

[0048] Working principle: During the cooling process of the SCR catalyst, the negative pressure generated by the operation of the suction fan 15 draws in external cold air through the connecting block 4 and connecting block 5 at the top of the connecting pipe 3. The cold air then enters the interior of the connecting pipe 3 and flows to the air inlet pipe 6 through the connecting pipe 8 on one side. Afterwards, the cold air is distributed into the interior of multiple parallel cooling pipes 7, which run through the top space of the mesh belt kiln 2. When cold air flows inside the stainless steel cooling pipe 7, it absorbs the high-temperature heat from the kiln through the pipe wall, thus indirectly cooling the SCR catalyst on the conveyor belt 1 below. During this process, the rigid aluminum silicate fiberboard 16 installed on the top of the inner wall of the mesh belt kiln 2 plays a crucial role in heat insulation. It is firmly connected to the kiln body through anchors, effectively preventing heat loss to the top of the kiln. This solves the problems of energy waste caused by upward heat radiation in traditional kilns and catalyst cracking due to excessively rapid or uneven cooling. By concentrating heat in the cooling area, the thermal efficiency of the equipment is enhanced, achieving stable, uniform, and efficient catalyst cooling, and ensuring the long-term stability and reliability of the structure. When cold air enters the cooling pipe 7, it first encounters a downward slope of eight degrees. The first guide plate 11 actively guides the airflow above and presses it towards the bottom of the inner wall of the cooling pipe 7, thereby enhancing the flow rate and velocity of the airflow at the bottom and solving the problem of insufficient heat exchange at the bottom caused by airflow stratification. Next, the airflow passes through the second guide plate 12, which is tilted five degrees in the opposite direction, suppressing the turbulence caused by excessive downward pressure and balancing the velocity difference between the airflow in the center of the pipe and the airflow attached to the wall. Then, the third guide plate 13, which is parallel to the bottom axis of the cooling pipe 7, regulates the airflow, ensuring that the airflow after the first two stages of regulation can finally flow out in a stable horizontal direction and avoid the flow deviation phenomenon at the outlet. Finally, multiple micro-protrusions 14 distributed perpendicular to the airflow direction physically disturb and destroy the airflow stagnation boundary layer that is close to the bottom of the inner wall of the pipe. This boundary layer is the main obstacle to heat exchange. The micro-convex ribs 14 draw in the low-speed stagnant airflow and mix it with the mainstream airflow in the middle, improving the uniformity of the flow velocity in the entire bottom region. This solves the problem of low heat exchange efficiency caused by uneven airflow and boundary layer effects within the pipe, enabling precise control of the airflow within the pipe and enhancing the heat exchange effect between the cold air and the pipe wall, thereby ensuring deep and uniform cooling of the SCR catalyst. After heat exchange is completed, the air that has absorbed heat flows out from the cooling pipe 7, merges into the outlet pipe 10, and is eventually discharged.

Claims

1. A mesh belt kiln cooling structure for an SCR catalyst, comprising a conveyor belt (1), characterized in that: A mesh belt kiln (2) is fixedly connected to one side of the conveyor belt (1), and a cooling assembly is provided on the inner wall of the mesh belt kiln (2). The cooling assembly includes multiple cooling pipes (7), which are located on the inner wall of the mesh belt kiln (2). A rigid aluminum silicate fiberboard (16) is provided on the top of the inner wall of the mesh belt kiln (2). Both ends of the multiple cooling pipes (7) pass through the rigid aluminum silicate fiberboard (16) and extend to the top of the mesh belt kiln (2). A connecting pipe (3), an air inlet pipe (6), and an air outlet pipe (10) are provided on the top of the mesh belt kiln (2). A connecting block (4) and a connecting block (5) are fixedly connected to the top two sides of the connecting pipe (3). The two sides of the connecting pipe (3) are connected to the air inlet pipe (6) and the air outlet pipe (10) through the connecting pipe (8).

2. The mesh belt kiln cooling structure for an SCR catalyst according to claim 1, characterized by: The bottom of each of the connecting pipe (3), the air inlet pipe (6) and the air outlet pipe (10) is fixedly connected to a plurality of support blocks (9), and the bottom of the plurality of support blocks (9) is fixedly connected to the top of the mesh belt kiln (2).

3. The cooling structure for a mesh belt kiln for an SCR catalyst according to claim 2, characterized by: The top of the mesh belt kiln (2) is fixedly connected to a suction fan (15), and the output end of the suction fan (15) is connected to one end of the connecting pipe (3).

4. The cooling structure for a mesh belt kiln for an SCR catalyst according to claim 3, characterized by: The rigid aluminum silicate fiberboard (16) is fixedly connected to the top of the inner wall of the mesh belt kiln (2) by anchors, and each cooling pipe (7) is provided with a guide component inside.

5. A mesh belt kiln cooling structure for an SCR catalyst according to claim 4, characterized in that: The guiding assembly includes multiple guide plates one (11), guide plates two (12), guide plates three (13) and micro-protruding ribs (14), the outer walls of the multiple guide plates one (11), guide plates two (12), guide plates three (13) and micro-protruding ribs (14) are fixedly connected to the inner wall of the cooling pipe (7).

6. The mesh belt kiln cooling structure for SCR catalyst according to claim 5, characterized in that: Multiple of the aforementioned guide vanes (11) are inclined toward the bottom of the inner wall of the cooling pipe (7) and at an angle of 8° with the bottom axis of the cooling pipe (7) to guide the airflow toward the bottom of the inner wall of the cooling pipe (7).

7. The mesh belt kiln cooling structure for SCR catalyst according to claim 6, characterized in that: Multiple guide plates two (12) are inclined toward the top of the inner wall of the cooling pipe (7) and at an angle of 5° between them and the bottom axis of the cooling pipe (7). Multiple guide plates three (13) are parallel to each other and the bottom axis of the cooling pipe (7).

8. The mesh belt kiln cooling structure for SCR catalyst according to claim 7, characterized in that: The multiple micro-ribs (14) are vertically distributed between the bottom axis of the cooling pipe (7) to disrupt the airflow at the bottom of the inner wall of the cooling pipe (7).

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