Shale ceramsite rotary kiln calcination waste heat recovery device

Abstract

The utility model relates to the field of rotary kiln calcination waste heat recovery, in particular to a shale ceramsite rotary kiln calcination waste heat recovery device which is characterized in that a pipeline rotary kiln is connected to a heat exchange device, the heat exchange device comprises a tank body, a heat exchange pipe is installed in the tank body, and a cleaning assembly is arranged on the surface of the heat exchange pipe. The cleaning assembly comprises a motor, a threaded rod, a threaded cylinder and a cleaning plate, one end of the threaded rod is fixedly connected with the output end of the motor, the threaded cylinder is in threaded connection with the surface of the threaded rod, and the cleaning plate is fixedly mounted on the surface of the threaded cylinder; the cleaning assembly is arranged on the heat exchange tube, the motor in the cleaning assembly is used for driving the cleaning plate to move, the cleaning plate scrapes the side wall of the heat exchange tube, the effect of removing scale on the outer wall of the heat exchange tube is achieved, meanwhile, the side wall of the cleaning plate makes contact with the inner wall of the tank body, and the scale is removed. And therefore, the effect of cleaning the inner wall of the tank body is achieved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery from rotary kiln calcination, specifically to a waste heat recovery device for rotary kiln calcination of shale ceramsite. Background Technology

[0002] Shale ceramsite is a spherical or elliptical porous lightweight aggregate made primarily of shale, which is crushed and expanded by high-temperature calcination. It has a small particle size and a honeycomb-like pore structure inside. Currently, rotary kilns are used in the pelletizing process of shale ceramsite.

[0003] When a rotary kiln is used for pelletizing, waste gas is generated. Existing waste gas is directly discharged into the air after purification, which wastes the heat it carries. Current technology uses water as a medium for heat exchange to reuse the heat carried by the waste gas. However, after long-term operation, scale will form on the walls of the heat exchange tubes. This scale will affect the heat exchange efficiency. Utility Model Content

[0004] Based on the above description, this utility model provides a waste heat recovery device for shale ceramsite rotary kiln calcination, in order to solve the problem of scale buildup on the heat exchange tube walls inside existing recovery devices.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a waste heat recovery device for calcination of shale ceramsite rotary kiln, comprising connecting a rotary kiln with a heat exchange device via a pipeline.

[0006] The heat exchange device includes a tank, inside which heat exchange tubes are installed, and on the surface of the heat exchange tubes are cleaning components. The cleaning components include a motor, a threaded rod, a threaded cylinder, and a cleaning plate. One end of the threaded rod is fixedly connected to the output end of the motor, the threaded cylinder is threadedly connected to the surface of the threaded rod, and the cleaning plate is fixedly installed on the surface of the threaded cylinder.

[0007] A discharge assembly is installed on one side of the tank. The discharge assembly includes a discharge cylinder, a discharge tube, and a filter element. One end of the discharge cylinder is installed on the side wall of the tank, one end of the discharge tube is installed on the bottom of the discharge cylinder, and the filter element is installed inside the discharge cylinder.

[0008] Furthermore, the heat exchange device also includes a heat exchange section, an air inlet chamber, and an exhaust chamber disposed inside the tank body. The heat exchange section is located between the air inlet chamber and the exhaust chamber. An air inlet pipe is provided at one end of the air inlet chamber, and an exhaust pipe is provided at one end of the exhaust chamber.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the heat exchange section includes a heat exchange tube, a first baffle, and a second baffle. The first baffle and the second baffle are located at both ends of the heat exchange tube, and the heat exchange tube passes through both the first baffle and the second baffle.

[0011] Furthermore, the side of the first baffle closest to the second baffle is designed to be inclined, and the inclination direction is towards one side of the discharge cylinder.

[0012] Furthermore, the cleaning plate is movably sleeved on the surface of the heat exchange tube, and the end of the threaded rod away from the motor is movably connected to one side of the second baffle through a bearing.

[0013] Furthermore, the filter element includes a connecting rod, a filter plate, and a cover plate, with one end of the connecting rod connected to the filter plate and the other end connected to the cover plate.

[0014] Furthermore, the inner wall of the cover plate is provided with a threaded groove, and the cover plate is threadedly connected to the outer wall of the discharge cylinder at the end away from the tank body.

[0015] Furthermore, a water inlet pipe is installed on one side of the tank, and the water inlet pipe and the discharge cylinder are distributed on both sides of the side wall of the tank, while the water inlet pipe and the discharge cylinder are located at both ends of the tank.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0017] 1. This utility model sets a cleaning component on the heat exchange tube and uses a motor in the cleaning component to drive the cleaning plate to move, so that the cleaning plate scrapes the side wall of the heat exchange tube to remove scale on the outer wall of the heat exchange tube. At the same time, the side wall of the cleaning plate contacts the inner wall of the tank, thereby achieving the effect of cleaning the inner wall of the tank.

[0018] 2. By installing a discharge cylinder and a discharge pipe on one side of the tank, water flows through the discharge cylinder and discharges to the outside of the tank. A filter is installed inside the discharge cylinder to filter the water flow and prevent scale from being discharged directly with the water flow. The threaded connection between the cover plate and the discharge cylinder, combined with the vertical design between the discharge cylinder and the discharge pipe, makes it easy to pull out the filter plate by twisting the cover plate, which can quickly disassemble the filter plate and make it easy to clean the scale on the filter plate. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a waste heat recovery device for shale ceramsite rotary kiln calcination provided in this embodiment of the utility model;

[0020] Figure 2 This is a cross-sectional three-dimensional structural schematic diagram of the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the heat exchange device in this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the filter element in this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Rotary kiln; 2. Heat exchanger; 21. Tank body; 22. Heat exchange section; 221. Heat exchange tube; 222. First baffle; 223. Second baffle; 23. Air inlet chamber; 24. Exhaust chamber; 3. Cleaning assembly; 31. Motor; 32. Threaded rod; 33. Threaded cylinder; 34. Cleaning plate; 4. Discharge assembly; 41. Discharge cylinder; 42. Discharge cylinder; 43. Filter element; 431. Connecting rod; 432. Filter plate; 433. Cover plate; 5. Air inlet pipe; 6. Exhaust pipe; 7. Water inlet pipe. Detailed Implementation

[0025] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the technical product is in use. They are used only for the convenience of describing the technology 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 the technology. Furthermore, "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. Therefore, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0028] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this technology, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0030] Please see Figure 1 , Figure 2 and Figure 3 A waste heat recovery device for calcination of shale ceramsite in a rotary kiln includes a rotary kiln 1 connected to a heat exchange device 2 via a pipeline.

[0031] The heat exchange device 2 includes a tank 21, inside which heat exchange tubes 221 are installed, and a cleaning assembly 3 is provided on the surface of the heat exchange tubes 221. The cleaning assembly 3 includes a motor 31, a threaded rod 32, a threaded cylinder 33, and a cleaning plate 34. One end of the threaded rod 32 is fixedly connected to the output end of the motor 31, and the threaded cylinder 33 is threadedly connected to the surface of the threaded rod 32. The cleaning plate 34 is fixedly installed on the surface of the threaded cylinder 33. The motor 31 is installed at the bottom of the tank 21. When the motor 31 is started, it drives the threaded rod 32 to rotate, which in turn drives the threaded cylinder 33 to move on the threaded rod 32. Since the threaded cylinder 33 and the cleaning plate 34 are fixedly connected, the cleaning plate 34 cleans the surface of the heat exchange tubes 221. The side wall of the cleaning plate 34 is in contact with the inner wall of the tank 21. When the cleaning plate 34 moves, it also scrapes and cleans the inner wall of the tank 21.

[0032] A discharge assembly 4 is installed on one side of the tank body 21. The discharge assembly 4 includes a discharge cylinder 41, a discharge cylinder 42, and a filter element 43. One end of the discharge cylinder 41 is installed on the side wall of the tank body 21, and one end of the discharge cylinder 42 is installed on the bottom of the discharge cylinder 41. Water inside the tank body 21 is discharged from the discharge cylinder 41 and flows away along the discharge cylinder 42 to remove the heat from the exhaust gas. The filter element 43 is installed inside the discharge cylinder 41. The filter element 43 filters the water after heat exchange to prevent scale from being directly discharged and used with the water flow.

[0033] Please see Figure 2 and Figure 3The heat exchange device 2 in this embodiment also includes a heat exchange section 22, an air inlet chamber 23 and an exhaust chamber 24 disposed inside the tank body 21. The heat exchange section 22 is located between the air inlet chamber 23 and the exhaust chamber 24. An air inlet pipe 5 is provided at one end of the air inlet chamber 23 and an exhaust pipe 6 is provided at one end of the exhaust chamber 24.

[0034] The exhaust gas enters through the intake pipe 5, flows through the intake chamber 23 into the heat exchange pipe 221, then flows through the heat exchange pipe 221 into the exhaust chamber 24, and finally flows from the exhaust chamber 24 into the exhaust pipe 6 for discharge.

[0035] Please see Figure 2 and Figure 3 In this embodiment, the heat exchange section 22 includes a heat exchange tube 221, a first baffle 222 and a second baffle 223. The first baffle 222 and the second baffle 223 are located at both ends of the heat exchange tube 221, and the heat exchange tube 221 passes through the first baffle 222 and the second baffle 223.

[0036] Please see Figure 2 and Figure 3 In this embodiment, the side of the first baffle 222 near the second baffle 223 is designed to be inclined, and the inclined direction is towards one side of the discharge cylinder 41. The inclined design makes it convenient for water to flow into the discharge cylinder 41 automatically.

[0037] Please see Figure 2 and Figure 3 In this embodiment, the cleaning plate 34 is movably sleeved on the surface of the heat exchange tube 221, and the end of the threaded rod 32 away from the motor 31 is movably connected to the side of the second baffle 223 through a bearing.

[0038] Please see Figure 3 and Figure 4 The filter element 43 in this embodiment includes a connecting rod 431, a filter plate 432 and a cover plate 433. One end of the connecting rod 431 is connected to the filter plate 432 and the other end is connected to the cover plate 433. The filter plate 432 is a circular plate with multiple filter holes to facilitate the filtration and removal of impurities from the water after heat exchange.

[0039] Please see Figure 3 and Figure 4 In this embodiment, the inner wall of the cover plate 433 is provided with a threaded groove, and the cover plate 433 is threadedly connected to the outer wall of the discharge cylinder 41 away from the tank body 21. Twisting the cover plate 433 allows the cover plate 433 to be installed with the discharge cylinder 41, while loosening the cover plate 433 allows the filter plate 432 to be taken out directly, which is convenient for cleaning the filter plate 432.

[0040] Please see Figure 2 , Figure 3 and Figure 4In this embodiment, a water inlet pipe 7 is installed on one side of the tank body 21, and the water inlet pipe 7 and the discharge cylinder 41 are distributed on both sides of the side wall of the tank body 21. At the same time, the water inlet pipe 7 and the discharge cylinder 41 are located at both ends of the tank body 21. Valves are installed on both the water inlet pipe 7 and the discharge cylinder 42. The valves are used to control the water inlet and outlet of the water inlet pipe 7 and the storage cylinder. When necessary, the valves on both are closed to ensure that the water can have more time to contact and exchange heat with the heat exchange tube 221.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery device for shale ceramsite rotary kiln calcination, comprising a rotary kiln (1) connected to a heat exchange device (2) via a pipeline, characterized in that: The heat exchange device (2) includes a tank (21), and a heat exchange tube (221) is installed inside the tank (21). A cleaning assembly (3) is provided on the surface of the heat exchange tube (221). The cleaning assembly (3) includes a motor (31), a threaded rod (32), a threaded cylinder (33), and a cleaning plate (34). One end of the threaded rod (32) is fixedly connected to the output end of the motor (31). The threaded cylinder (33) is threadedly connected to the surface of the threaded rod (32). The cleaning plate (34) is fixedly installed on the surface of the threaded cylinder (33). A discharge assembly (4) is installed on one side of the tank (21). The discharge assembly (4) includes a discharge cylinder (41), a discharge cylinder (42), and a filter element (43). One end of the discharge cylinder (41) is installed on the side wall of the tank (21), one end of the discharge cylinder (42) is installed on the bottom of the discharge cylinder (41), and the filter element (43) is installed inside the discharge cylinder (41).

2. The waste heat recovery device for shale ceramsite rotary kiln calcination according to claim 1, characterized in that, The heat exchange device (2) further includes a heat exchange section (22), an air inlet chamber (23) and an exhaust chamber (24) disposed inside the tank body (21). The heat exchange section (22) is located between the air inlet chamber (23) and the exhaust chamber (24). An air inlet pipe (5) is provided at one end of the air inlet chamber (23), and an exhaust pipe (6) is provided at one end of the exhaust chamber (24).

3. The waste heat recovery device for shale ceramsite rotary kiln calcination according to claim 2, characterized in that, The heat exchange section (22) includes a heat exchange tube (221), a first baffle (222) and a second baffle (223). The first baffle (222) and the second baffle (223) are located at both ends of the heat exchange tube (221), and the heat exchange tube (221) passes through the first baffle (222) and the second baffle (223).

4. The waste heat recovery device for shale ceramsite rotary kiln calcination according to claim 3, characterized in that, The side of the first baffle (222) near the second baffle (223) is designed to be inclined, and the inclined direction is towards the side of the discharge cylinder (41).

5. The waste heat recovery device for shale ceramsite rotary kiln calcination according to claim 1, characterized in that, The cleaning plate (34) is movably sleeved on the surface of the heat exchange tube (221), and the end of the threaded rod (32) away from the motor (31) is movably connected to one side of the second baffle (223) through a bearing.

6. The waste heat recovery device for shale ceramsite rotary kiln calcination according to claim 1, characterized in that, The filter element (43) includes a connecting rod (431), a filter plate (432) and a cover plate (433). One end of the connecting rod (431) is connected to the filter plate (432), and the other end is connected to the cover plate (433).

7. A waste heat recovery device for shale ceramsite rotary kiln calcination according to claim 6, characterized in that, The inner wall of the cover plate (433) is provided with a threaded groove, and the cover plate (433) is threadedly connected to the outer wall of the discharge cylinder (41) away from the tank body (21).

8. A waste heat recovery device for shale ceramsite rotary kiln calcination according to claim 2, characterized in that, A water inlet pipe (7) is installed on one side of the tank (21), and the water inlet pipe (7) and the discharge cylinder (41) are distributed on both sides of the side wall of the tank (21), while the water inlet pipe (7) and the discharge cylinder (41) are located at both ends of the tank (21).

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