A high-temperature flue gas mixing device

Abstract

This application discloses a high-temperature flue gas mixing device. The outer walls of both ends of the high-temperature flue are fixedly connected to the inner wall of the kiln passage, and the output section of the high-temperature flue is connected to the chamber of the kiln passage. A sealing plate is fixedly installed at the connection between the high-temperature flue and the kiln passage. A low-temperature flue is spirally wound around the periphery of the high-temperature flue, with its input end connected to an external low-temperature flue gas source, and its output end penetrating the sealing plate and extending to the connection between the high-temperature flue and the kiln passage. A throttling component is installed at the connection between the input end of the low-temperature flue and the external low-temperature flue gas source. In this application, the low-temperature flue is spirally wound around the periphery of the high-temperature flue, allowing the low-temperature flue gas to be fully preheated before entering the mixing zone, reducing local overheating and preventing crusting. The throttling component can control the flow rate of the low-temperature flue gas, and through real-time adjustment, the temperature of the mixed flue gas can be flexibly controlled to ensure it remains within a safe range, guaranteeing continuous production. The sealing plate ensures the sealing of the connection between the high-temperature flue and the kiln passage, preventing high-temperature flue gas leakage.

Description

Technical Field

[0001] This application relates to the field of flue gas mixing technology, and in particular to a high-temperature flue gas mixing device. Background Technology

[0002] A flue gas mixer is used to rapidly mix and cool high-temperature flue gas with low-temperature flue gas (air), preventing scaling and blockage during the cooling process. In industries such as cement kilns and metallurgy, the mixing of high- and low-temperature flue gas is a key piece of equipment in the process system.

[0003] In existing technologies, traditional flue gas mixers mainly rely on simple physical mixing methods, such as pipe or cavity structures, to directly mix high-temperature flue gas with low-temperature flue gas (air). However, during the mixing process, the high-temperature flue gas cools down rapidly, causing local overheating of the mixed flue gas. This can easily lead to the formation of a crust inside the equipment, and in some cases, the crust can gradually thicken, eventually causing blockage.

[0004] Therefore, there is an urgent need for a high-temperature flue gas mixing device to solve the above problems. Utility Model Content

[0005] This application provides a high-temperature flue gas mixing device, which aims to effectively solve the problem of crusting and blockage caused by rapid cooling of high-temperature flue gas, thereby ensuring the continuity of equipment production.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A high-temperature flue gas mixing device includes a kiln tunnel, a high-temperature flue, a sealing plate, a low-temperature flue, and a throttling component;

[0008] The axial direction of the kiln passage is consistent with the conveying path of the high-temperature flue gas.

[0009] The high-temperature flue is spaced apart inside the kiln. The input end of the high-temperature flue is connected to an external high-temperature flue gas source, and its output end extends into the interior of the kiln. The outer walls of both ends of the high-temperature flue are fixedly connected to the inner wall of the kiln, and the output section of the high-temperature flue is connected to the chamber of the kiln.

[0010] The sealing plate is fixedly installed at the connection between the high-temperature flue and the kiln passage, and the circumferential surface of the sealing plate is fixedly connected to the inner wall of the kiln passage to form a sealing fit.

[0011] The low-temperature flue is spirally wound around the periphery of the high-temperature flue. The input end of the low-temperature flue is connected to an external low-temperature flue gas source, and its output end passes through the sealing plate and extends to the connection between the high-temperature flue and the kiln passage.

[0012] The throttling component is located at the connection between the inlet of the low-temperature flue and the external low-temperature flue gas source, and is used to limit the flow rate of the low-temperature flue.

[0013] Furthermore, a guide net is fixedly connected to the periphery of the output section of the high-temperature flue, and multiple air holes are penetrating the periphery of the guide net in its radial direction. The length direction of each of the multiple air holes is set at an angle to the axial direction of the high-temperature flue.

[0014] Furthermore, the throttling assembly includes a connecting pipe, a rotating block, a first baffle, and a second baffle;

[0015] One end of the connecting pipe is fixedly connected to the input end of the low-temperature flue, and the other end is fixedly connected to the output end of the external low-temperature flue gas source.

[0016] The first baffle is fixedly disposed inside the connecting pipe. The thickness direction of the first baffle is consistent with the axial direction of the connecting pipe. The surface of the first baffle has a first through hole for flue gas to pass through.

[0017] The rotating block of the annular structure is disposed inside the connecting pipe and located on the side of the first baffle close to the external low-temperature flue gas source. The axial direction of the rotating block is consistent with the axial length direction of the connecting pipe, and the circumferential surface of the rotating block is rotatably connected to the circumference of the connecting pipe.

[0018] The second baffle is disposed on the inner side of the rotating block. The surface of the second baffle is in contact with the surface of the first baffle. The surface of the second baffle has a plurality of second through holes. The plurality of second through holes are arranged at equal intervals, clockwise or counterclockwise, around the axis of the connecting pipe with the core of the first through hole.

[0019] Furthermore, both end faces of the connection between the connecting pipe and the rotating block are provided with sliding grooves, the groove openings of the sliding grooves face the side where the rotating block is located, and sliding rods extend from both end faces of the rotating block in opposite directions along its axial direction, with the circumferential surface of the sliding rods slidably connected to the groove wall of the sliding groove.

[0020] Furthermore, the outer wall of the high-temperature flue near the low-temperature flue has multiple fins extending radially therefrom. The multiple fins are spirally arranged along the axial direction of the high-temperature flue, and a portion of the circumferential surface of the multiple fins is in contact with the circumferential surface of the low-temperature flue.

[0021] Furthermore, the spiral direction of the plurality of fins is consistent with the spiral direction of the low-temperature flue.

[0022] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0023] In this application, the low-temperature flue gas is spirally wound around the periphery of the high-temperature flue gas, allowing the low-temperature flue gas to be fully preheated before entering the mixing zone. Furthermore, during the spiral flow, it undergoes more thorough heat exchange with the high-temperature environment surrounding the high-temperature flue gas, reducing the occurrence of localized overheating and preventing crusting when the high-temperature and low-temperature flue gas come into contact. The throttling component controls the flow rate of the low-temperature flue gas. By adjusting the throttling component in real time, the temperature of the mixed flue gas can be flexibly controlled according to process requirements, ensuring that the flue gas temperature remains within a safe range and preventing subsequent processes from being affected by excessively high or low temperatures, thus ensuring production continuity. The sealing plate ensures the airtightness of the connection between the high-temperature flue gas and the kiln passage, preventing high-temperature flue gas leakage. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of the assembled state provided in the embodiments of this application;

[0026] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0027] Figure 3 for Figure 1 A magnified view of a portion of region B in the middle.

[0028] Icons: 10-Kiln passage; 11-High-temperature flue; 12-Low-temperature flue; 13-Sealing plate; 14-Guide net; 141-Air hole; 15-Fin; 20-Throttling component; 21-Connecting pipe; 211-Slide groove; 22-Rotating block; 221-Slide rod; 23-First baffle; 231-First through hole; 24-Second baffle; 241-Second through hole. Detailed Implementation

[0029] 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, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0030] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0031] like Figures 1-3 As shown, a high-temperature flue gas mixing device includes a kiln duct 10, a high-temperature flue duct 11, a sealing plate 13, a low-temperature flue duct 12, and a throttling component 20. The axial direction of the kiln duct 10 is consistent with the conveying path of the high-temperature flue gas. The high-temperature flue ducts 11 are spaced apart inside the kiln duct 10. The input end of the high-temperature flue duct 11 is connected to an external high-temperature flue gas source, and its output end extends into the interior of the kiln duct 10. The outer walls of both ends of the high-temperature flue duct 11 are fixedly connected to the inner wall of the kiln duct 10, and the output section of the high-temperature flue duct 11 is connected to the chamber of the kiln duct 10. The sealing plate 13 is fixedly connected to the inner wall of the kiln duct 10. The sealing plate 13 is fixedly installed at the connection between the high-temperature flue 11 and the kiln passage 10. The peripheral surface of the sealing plate 13 is fixedly connected to the inner wall of the kiln passage 10, forming a sealing fit. The low-temperature flue 12 is spirally wound around the periphery of the high-temperature flue 11. The input end of the low-temperature flue 12 is connected to an external low-temperature flue gas source, and its output end passes through the sealing plate 13 and extends to the connection between the high-temperature flue 11 and the kiln passage 10. The throttling component 20 is installed at the connection between the input end of the low-temperature flue 12 and the external low-temperature flue gas source to limit the flow rate of the low-temperature flue 12.

[0032] In the above scheme, the low-temperature flue 12 is spirally wound around the periphery of the high-temperature flue 11, allowing the low-temperature flue gas to be fully preheated before entering the mixing zone and to exchange heat more thoroughly with the high-temperature environment surrounding the high-temperature flue 11 during the spiral flow. When the low-temperature flue gas and the high-temperature flue gas mix at the connection between the high-temperature flue 11 and the kiln passage 10, the temperature difference between the preheated low-temperature flue gas and the high-temperature flue gas decreases, resulting in uniform mixing of the two flue gases, reducing the occurrence of local overheating, and preventing the formation of a crust when the high-temperature flue gas comes into contact with the low-temperature flue gas. The throttling component 20 can control the flow rate of the low-temperature flue gas and adjust the mixing ratio of the high-temperature and low-temperature flue gases. By adjusting the throttling component 20 in real time, the temperature of the mixed flue gas can be flexibly controlled according to process requirements, ensuring that the flue gas temperature is within a safe range and avoiding the impact of excessively high or low temperatures on subsequent processes, thereby ensuring production continuity. The sealing plate 13 ensures the sealing of the connection between the high-temperature flue 11 and the kiln passage 10, preventing high-temperature flue gas leakage, while reducing energy waste and the impact on the surrounding environment.

[0033] A guide net 14 is fixedly connected to the periphery of the output section of the high-temperature flue 11. A plurality of air holes 141 are penetrating the periphery of the guide net 14 along its radial direction. The length direction of the plurality of air holes 141 is set at an angle to the axial direction of the high-temperature flue 11.

[0034] In the above scheme, when the high-temperature flue gas impacts the guide net 14, some of the high-temperature flue gas will flow through the vents 141. The vents 141 are set at an angle to the axial direction of the high-temperature flue duct 11, causing the low-temperature flue gas to change its flow direction when passing through the vents 141, forming a jet with a certain angle. The jet-shaped low-temperature flue gas can interact with the surrounding high-temperature flue gas that has not passed through the vents 141, increasing the collision and mixing opportunities between the high-temperature and low-temperature flue gas, and promoting the full mixing of the high-temperature and low-temperature flue gas.

[0035] The throttling assembly 20 includes a connecting pipe 21, a rotating block 22, a first baffle 23, and a second baffle 24. One end of the connecting pipe 21 is fixedly connected to the input end of the low-temperature flue duct 12, and the other end is fixedly connected to the output end of the external low-temperature flue gas source. The first baffle 23 is fixedly disposed inside the connecting pipe 21, and the thickness direction of the first baffle 23 is consistent with the axial direction of the connecting pipe 21. A first through hole 231 for flue gas to pass through is provided on the surface of the first baffle 23. The annular rotating block 22 is disposed inside the connecting pipe 21 and positioned... On the side of the first baffle 23 near the external low-temperature flue gas source, the axial direction of the rotating block 22 is consistent with the axial length direction of the connecting pipe 21, and the circumferential surface of the rotating block 22 is rotatably connected to the circumference of the connecting pipe 21; the second baffle 24 is disposed inside the rotating block 22, and the plate surface of the second baffle 24 is in contact with the plate surface of the first baffle 23. The plate surface of the second baffle 24 has a plurality of second through holes 241, and the plurality of second through holes 241 are arranged at equal intervals clockwise or counterclockwise around the axis of the connecting pipe 21 with the core of the first through hole 231.

[0036] In the above scheme, when it is necessary to adjust the flow rate of the low-temperature flue gas, the rotating block 22 is rotated around the axis of the connecting pipe 21 by an external driving device (such as a handle, motor, etc.). When the rotating block 22 rotates, it is fixedly connected to the second baffle 24 and rotates together, so that the second through hole 241 and the first through hole 231 are staggered. When the second through hole 241 and the first through hole 231 are completely aligned, the channel area through which the low-temperature flue gas passes is the largest, and the flow rate of the low-temperature flue gas is the largest. As the rotating block 22 continues to rotate, the overlapping area of ​​the second through hole 241 and the first through hole 231 gradually decreases, and the channel area through which the low-temperature flue gas passes also decreases, and the flow rate of the low-temperature flue gas decreases. When the second through hole 241 and the first through hole 231 are completely misaligned, the low-temperature flue gas cannot pass through the connecting pipe 21, and the flow rate is zero.

[0037] In practice, the diameter of the plurality of second vents 141 in this application increases or decreases sequentially in a clockwise or counterclockwise direction along the axis of the second baffle 24.

[0038] Both ends of the connection between the connecting pipe 21 and the rotating block 22 are provided with sliding grooves 211. The opening of the sliding groove 211 faces the side where the rotating block 22 is located. Both ends of the rotating block 22 along its axial direction are provided with sliding rods 221 extending in opposite directions. The circumferential surface of the sliding rods 221 is slidably connected to the groove wall of the sliding groove 211.

[0039] In the above scheme, the sliding fit between the groove 211 and the slide rod 221 provides stable rotational support for the rotating block 22. During the rotation of the rotating block 22, the slide rod 221 slides within the groove 211. The groove wall of the groove 211 constrains and guides the slide rod 221, preventing the rotating block 22 from wobbling, shifting, or tilting during rotation. This reduces the gap between the rotating block 22 and the connecting pipe 21, lowers the possibility of low-temperature flue gas leaking from the connection, and thus ensures the reliability of flow regulation.

[0040] The high-temperature flue 11 has a plurality of fins 15 extending radially along the outer wall of the side closest to the low-temperature flue 12. The plurality of fins 15 are spirally arranged along the axial direction of the high-temperature flue 11, and a portion of the circumferential surface of the plurality of fins 15 is in contact with the circumferential surface of the low-temperature flue 12.

[0041] In the above scheme, the arrangement of multiple fins 15 increases the heat exchange area between the high-temperature flue 11 and the low-temperature flue 12. Simultaneously, the spirally arranged fins 15 prolong the contact time between the low-temperature flue gas and the fins 15 within the low-temperature flue 12, allowing heat to be transferred more efficiently from the high-temperature flue 11 to the low-temperature flue 12, thus enabling the low-temperature flue gas to heat up faster and improving energy utilization. Furthermore, the fins 15 are spirally arranged along the axial direction of the high-temperature flue 11, with part of their circumference in contact with the low-temperature flue 12. This allows the low-temperature flue gas to uniformly exchange heat with the fins 15 during flow, improving the temperature uniformity of the mixed flue gas.

[0042] The spiral direction of the plurality of fins 15 is consistent with the spiral direction of the low-temperature flue 12.

[0043] In the above scheme, the spiral direction of the fins 15 and the low-temperature flue 12 is consistent. The purpose is to reduce the resistance of the low-temperature flue gas in the low-temperature flue 12 during the flow process, so that the low-temperature flue gas can flow more smoothly, thereby increasing the contact time and contact area between the low-temperature flue gas and the fins 15 in the low-temperature flue 12, improving the heat exchange efficiency, and reducing energy consumption.

[0044] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0045] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A high-temperature flue gas mixing device, characterized in that, It includes a kiln passage (10), a high-temperature flue (11), a sealing plate (13), a low-temperature flue (12), and a throttling component (20); The axial direction of the kiln passage (10) is consistent with the conveying path of the high-temperature flue gas; The high-temperature flue (11) is spaced apart inside the kiln (10). The input end of the high-temperature flue (11) is connected to an external high-temperature flue gas source, and its output end extends into the inside of the kiln (10). The outer walls of both ends of the high-temperature flue (11) are fixedly connected to the inner wall of the kiln (10). The output section of the high-temperature flue (11) is connected to the chamber of the kiln (10). The sealing plate (13) is fixedly installed at the connection between the high-temperature flue (11) and the kiln (10). The circumferential surface of the sealing plate (13) is fixedly connected to the inner wall of the kiln (10) and forms a sealing fit. The low-temperature flue (12) is spirally wound around the periphery of the high-temperature flue (11). The input end of the low-temperature flue (12) is connected to an external low-temperature flue gas source, and its output end passes through the sealing plate (13) and extends to the connection between the high-temperature flue (11) and the kiln passage (10). The throttling component (20) is located at the connection between the inlet of the low-temperature flue (12) and the external low-temperature flue gas source, and is used to limit the flow rate of the low-temperature flue (12).

2. The high-temperature flue gas mixing device according to claim 1, characterized in that, A guide net (14) is fixedly connected to the periphery of the output section of the high-temperature flue (11). The guide net (14) has multiple air holes (141) penetrating its periphery along its radial direction. The length direction of the multiple air holes (141) is set at an angle to the axial direction of the high-temperature flue (11).

3. The high-temperature flue gas mixing device according to claim 1, characterized in that, The throttling assembly (20) includes a connecting pipe (21), a rotating block (22), a first baffle (23), and a second baffle (24); One end of the connecting pipe (21) is fixedly connected to the input end of the low-temperature flue (12), and the other end is fixedly connected to the output end of the external low-temperature flue gas source. The first baffle (23) is fixedly disposed inside the connecting pipe (21). The thickness direction of the first baffle (23) is consistent with the axial direction of the connecting pipe (21). The surface of the first baffle (23) has a first through hole (231) for flue gas to pass through. The rotating block (22) of the annular structure is disposed inside the connecting pipe (21) and located on the side of the first baffle (23) near the external low-temperature flue gas source. The axial direction of the rotating block (22) is consistent with the axial length direction of the connecting pipe (21), and the circumferential surface of the rotating block (22) is rotatably connected to the circumference of the connecting pipe (21). The second baffle (24) is disposed on the inner side of the rotating block (22). The surface of the second baffle (24) is in contact with the surface of the first baffle (23). The surface of the second baffle (24) has a plurality of second through holes (241). The plurality of second through holes (241) are arranged at equal intervals clockwise or counterclockwise around the axis of the connecting pipe (21) with the core of the first through hole (231) around the axis of the connecting pipe (21).

4. The high-temperature flue gas mixing device according to claim 3, characterized in that, Both ends of the connection between the connecting pipe (21) and the rotating block (22) are provided with sliding grooves (211). The opening of the sliding groove (211) faces the side where the rotating block (22) is located. Both ends of the rotating block (22) along its axial direction are provided with sliding rods (221) extending in opposite directions. The circumferential surface of the sliding rods (221) is slidably connected to the groove wall of the sliding groove (211).

5. The high-temperature flue gas mixing device according to claim 1, characterized in that, The high-temperature flue (11) has multiple fins (15) extending radially along the outer wall of the side closest to the low-temperature flue (12). The multiple fins (15) are spirally arranged along the axial direction of the high-temperature flue (11), and a portion of the circumferential surface of the multiple fins (15) is in contact with the circumferential surface of the low-temperature flue (12).

6. The high-temperature flue gas mixing device according to claim 5, characterized in that, The spiral direction of the plurality of fins (15) is consistent with the spiral direction of the low-temperature flue (12).

Images