Combustion-supporting air inlet structure of rotary kiln

Abstract

The utility model discloses a combustion-supporting air inlet structure of a rotary kiln, and relates to the technical field of rotary kilns. The device comprises a fixing plate and a centrifugal fan, an air inlet assembly is arranged on the fixing plate, the air inlet assembly comprises a flow dividing disc fixedly connected to the side, away from the centrifugal fan, of the fixing plate and a sleeve penetrating through the fixing plate, and the flow dividing disc is fixedly communicated with a plurality of telescopic joints through branch pipes. And the interior of the sleeve is in threaded connection with a threaded rod, and a pretreatment assembly is arranged on the side, away from the fixing plate, of the centrifugal fan. The movable plate and the air inlet spray head are driven to move through the sleeve and the threaded rod, so that the air inlet position of the rotary kiln is adjusted, the problem that the air inlet position is inconvenient to adjust in the prior art is solved, combustion-supporting air is dehumidified through the filling frame, the combustion-supporting air is oxygenated and preheated through the oxygenation pipe and the serpentine pipe, and the air inlet position is adjusted. The problem that combustion-supporting air is inconvenient to pretreat in the prior art is solved.

Description

A rotary kiln combustion air intake structure Technical Field

[0001] This utility model belongs to the field of rotary kiln technology, and in particular relates to a rotary kiln combustion air intake structure. Background Technology

[0002] A rotary kiln is a large-scale industrial thermal equipment, mainly used for high-temperature processing of powdery or granular materials. It is widely used in building materials, metallurgy, chemical industry, environmental protection and other industries. A rotary kiln is mainly composed of a cylinder, support device, transmission system, combustion system, sealing device and auxiliary equipment. Among them, the combustion air inlet structure is an important part of the combustion system. It is mainly used to provide combustion air into the rotary kiln, so as to facilitate the combustion of fuel in the rotary kiln.

[0003] A rotary kiln combustion air inlet structure is disclosed in the existing patent announcement document CN119268336B, including a kiln head seat, a feeding air pipe slidably installed in the middle of the kiln head seat, multiple sets of combustion air pipes fixedly installed on the surface of the kiln head seat, an air outlet pipe rotatably installed at one end of the combustion air pipe located in the inner cavity of the rotary kiln, the feeding air pipe being connected to a telescopic component, a positioning mechanism being provided on the surface of the combustion air pipe, the positioning mechanism including a rotating component and a driving component, and a material guiding mechanism being provided at one end of the feeding air pipe located in the inner cavity of the rotary kiln, the material guiding mechanism including a material guiding plate, a support component and an adjustment component;

[0004] However, it still has the following drawbacks in practical use:

[0005] 1. The combustion air inlet structure described above supplies combustion air to the rotary kiln through the combustion air duct and the outlet duct. However, since the position of the outlet duct inside the rotary kiln is fixed, it is not convenient to adjust the position of the outlet duct according to actual needs, thus making it inconvenient to deliver combustion air into the rotary kiln.

[0006] 2. The combustion air inlet structure described above provides combustion air to the rotary kiln through the combustion air duct and outlet. However, it is not convenient to pre-treat the combustion air during use, which leads to the combustion effect being affected by factors such as humidity, oxygen content and temperature of the combustion air, resulting in poor functionality.

[0007] To address these issues, we provide a rotary kiln combustion air intake structure. Summary of the Invention

[0008] The purpose of this utility model is to provide a rotary kiln combustion air inlet structure. The structure uses a sleeve and a threaded rod to drive the movable plate and the air inlet nozzle to move, thereby adjusting the air inlet position of the rotary kiln. This solves the problem of the existing structure being inconvenient to adjust the air inlet position. At the same time, the combustion air is dehumidified by the packing frame, and oxygenated and preheated by the oxygenation pipe and the serpentine pipe, which solves the problem of the existing structure being inconvenient to pre-treat the combustion air.

[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0010] This utility model relates to a rotary kiln combustion air intake structure, comprising a fixed plate and a centrifugal fan. An air intake assembly is mounted on the fixed plate, including a distribution plate fixedly connected to the side of the fixed plate away from the centrifugal fan and a sleeve penetrating the fixed plate. Multiple expansion joints are fixedly connected to the distribution plate via branch pipes. Each expansion joint has an air intake nozzle fixedly connected to its end away from the distribution plate. A threaded rod is threaded into the sleeve, with a handwheel fixedly connected to one end and a movable plate fixedly connected to the other end. The movable plates are all fixedly connected to the outer wall of the air intake nozzles. A pretreatment assembly is mounted on the side of the centrifugal fan away from the fixed plate, comprising a treatment box located on the side of the centrifugal fan away from the fixed plate. A packing frame for filling with absorbent packing is fixedly connected to one side of the treatment box. Oxygen supply pipes are movably connected to the front and rear ends of the center of the treatment box. Multiple serpentine pipes are fixedly connected to the other side of the treatment box.

[0011] A further feature of this invention is that a first connecting pipe is fixedly connected to the side of the distribution plate near the fixed plate, and the end of the first connecting pipe away from the distribution plate passes through the fixed plate and is fixedly connected to the air outlet of the centrifugal fan.

[0012] A further feature of this invention is that a sliding rod is fixedly connected to the outer wall of the movable plate near the fixed plate, and the end of the sliding rod away from the movable plate passes through the fixed plate and is threadedly connected to a limit nut.

[0013] A further feature of this invention is that a filter screen is fixedly connected to the air inlet end of the treatment box, and an air collecting hood is fixedly connected to the air outlet end of the treatment box. A second connecting pipe is fixedly connected to the air collecting hood, and the end of the second connecting pipe away from the air collecting hood is fixedly connected to the air inlet end of the centrifugal fan.

[0014] The present invention is further configured such that: the top and bottom of the packing frame extend to the upper and lower sides of the processing box, respectively; ventilation holes are provided on both outer walls of the packing frame; an upper cover plate is snapped onto the upper inner side of the packing frame; and a lower cover plate is snapped onto the lower inner side of the packing frame.

[0015] A further feature of this invention is that: one end of the oxygen supply pipe is fixedly connected to an oxygen supply nozzle, and the other end of the oxygen supply pipe is fixedly connected to a third connecting pipe. The end of the third connecting pipe away from the oxygen supply pipe extends to the front and rear ends of the outer side of the treatment box, and a first synchronous pulley is fixedly connected to a section of the third connecting pipe located on the outer side of the treatment box.

[0016] A further feature of this invention is that a dual-axis motor is fixedly connected to the top center of the processing box via a motor frame, a transmission rod is fixedly connected to the output shaft of the dual-axis motor, and a second synchronous pulley is fixedly connected to the end of the transmission rod away from the dual-axis motor. The second synchronous pulley is connected to the first synchronous pulley via a synchronous belt.

[0017] A further feature of this invention is that one end of the serpentine tube extends to the outer rear end of the processing box and is fixedly connected to a distributor, and the other end of the serpentine tube extends to the outer front end of the processing box and is fixedly connected to a confluencer.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model, by setting up an air inlet component, rotates the handwheel, which drives the threaded rod to rotate synchronously. Under the action of the threaded connection between the threaded rod and the sleeve, the threaded rod drives the movable plate to move, and the movable plate drives the air inlet nozzle to move, thereby realizing the adjustment of the air inlet position of the rotary kiln. This facilitates the adjustment of the air inlet position of the rotary kiln, thus facilitating the delivery of combustion air into the rotary kiln.

[0020] 2. This utility model, by setting up a pretreatment component and starting a centrifugal fan, introduces external air into the treatment box. The combustion air is dehumidified by the water-absorbing packing in the packing frame, and oxygen is delivered into the treatment box through the oxygen supply pipe and oxygen supply nozzle, thereby increasing the oxygen content of the combustion air. The serpentine pipe is connected to the exhaust gas structure of the rotary kiln through a distributor and a confluencer, thereby preheating the combustion air with the waste heat of the rotary kiln exhaust gas. This pretreatment of the combustion air facilitates the combustion of fuel in the rotary kiln and makes it easier to deliver combustion air of different properties into the rotary kiln.

[0021] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 is a structural schematic diagram of the air intake component of this utility model;

[0025] Figure 3 is a schematic diagram of the installation of the diversion plate, expansion joint and air inlet nozzle of this utility model;

[0026] Figure 4 is a schematic diagram of the installation of the sleeve, movable plate and threaded rod of this utility model;

[0027] Figure 5 is a front cross-sectional view of the pretreatment component of this utility model;

[0028] Figure 6 is a structural disassembly diagram of the packing frame of this utility model;

[0029] Figure 7 is a schematic diagram of the installation of the oxygenation tube and the dual-shaft motor of this utility model;

[0030] Figure 8 is a schematic diagram of the structure of the serpentine tube of this utility model;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1-Fixed plate, 2-Centrifugal fan, 3-Air inlet assembly, 301-Diverter plate, 301a-Branch pipe, 301b-First connecting pipe, 302-Sleeve, 303-Expansion joint, 304-Air inlet nozzle, 305-Modible plate, 305a-Slide rod, 305b-Limit nut, 306-Threaded rod, 306a-Handwheel, 4-Pretreatment assembly, 401-Treatment box, 401a-Filter screen, 401b-Air collection hood, 401c-First connecting pipe Two connecting pipes, 402-stuffing frame, 402a-ventilation hole, 402b-upper cover plate, 402c-lower cover plate, 403-oxygenation pipe, 403a-oxygenation nozzle, 403b-third connecting pipe, 403c-first synchronous pulley, 404-dual shaft motor, 404a-motor frame, 404b-transmission rod, 404c-second synchronous pulley, 404d-synchronous belt, 405-serpentine pipe, 405a-diverter, 405b-merger. Detailed Implementation

[0033] 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 scope of protection of the present utility model. Embodiment 1

[0034] Please refer to Figures 1, 2, 3, and 4, which show the first embodiment of this utility model. This embodiment provides a rotary kiln combustion air inlet structure, including a fixed plate 1 and a centrifugal fan 2. An air inlet assembly 3 is provided on the fixed plate 1. The air inlet assembly 3 includes a diverter plate 301, a sleeve 302, an expansion joint 303, an air inlet nozzle 304, a movable plate 305, and a threaded rod 306. The sleeve 302 and the threaded rod 306 drive the movable plate 305 and the air inlet nozzle 304 to move, thereby adjusting the air inlet position of the rotary kiln, solving the problem of the inconvenience of adjusting the air inlet position in existing systems.

[0035] Specifically, the distribution plate 301 is fixedly connected to the side of the fixed plate 1 away from the centrifugal fan 2. Multiple sleeves 302 are provided, all penetrating the fixed plate 1. Multiple expansion joints 303 are fixedly connected to the distribution plate 301 via branch pipes 301a. Each expansion joint 303, away from the distribution plate 301, is fixedly connected to an air inlet nozzle 304. A threaded rod 306 is threaded internally connected to the sleeve 302. A handwheel 306a is fixedly connected to one end of the threaded rod 306, and a movable plate 305 is fixedly connected to the other end of the threaded rod 306. The movable plates 305 are all fixedly connected to the outer wall of the air inlet nozzle 304. The distribution plate 301 is used to evenly distribute the combustion air into multiple expansion joints 303. The branch pipe 301a is used to connect the distribution plate 301 and the expansion joints 303. The sleeve 302 is used to install the threaded rod 306. The expansion joint 303 is used to install the air inlet nozzle 304. The air inlet nozzle 304 is used to deliver the combustion air into the rotary kiln. The movable plate 305 is used to drive the air inlet nozzle 304 to move. The threaded rod 306 is used to drive the movable plate 305 to move. The handwheel 306a is used to facilitate the rotation of the threaded rod 306.

[0036] Furthermore, a first connecting pipe 301b is fixedly connected to the side of the diverter plate 301 near the fixed plate 1. The end of the first connecting pipe 301b away from the diverter plate 301 passes through the fixed plate 1 and is fixedly connected to the air outlet of the centrifugal fan 2.

[0037] A sliding rod 305a is fixedly connected to the outer wall of the movable plate 305 near the fixed plate 1. The end of the sliding rod 305a away from the movable plate 305 passes through the fixed plate 1 and is threadedly connected to a limit nut 305b.

[0038] The operation process of this embodiment is as follows: Rotating the handwheel 306a causes the threaded rod 306 to rotate synchronously. Under the action of the threaded connection between the threaded rod 306 and the sleeve 302, the threaded rod 306 drives the movable plate 305 to move, and the movable plate 305 drives the air inlet nozzle 304 to move, thus adjusting the air inlet position of the rotary kiln. Example 2

[0039] Please refer to Figures 1, 5, 6, 7, and 8, which show the second embodiment of this utility model. This embodiment is based on the previous embodiment, but differs from the previous embodiment in that a pretreatment component 4 is provided on the side of the centrifugal fan 2 away from the fixed plate 1. The pretreatment component 4 includes a treatment box 401, a packing frame 402, an oxygenation pipe 403, and a serpentine pipe 405. The packing frame 402 dehumidifies the combustion air, and the oxygenation pipe 403 and the serpentine pipe 405 oxygenate and preheat the combustion air, thus solving the problem of the inconvenience of pretreating the combustion air in the existing system.

[0040] Specifically, the treatment box 401 is located on the side of the centrifugal fan 2 away from the fixed plate 1. A packing frame 402 for filling with water-absorbing packing is fixedly connected to one side of the treatment box 401. Oxygen-adding pipes 403 are movably connected to both the front and rear ends of the center of the treatment box 401. Multiple serpentine pipes 405 are fixedly connected to the other side of the treatment box 401. The treatment box 401 is set up to pre-treat the combustion air. The packing frame 402 is set up to store the water-absorbing packing, thereby dehumidifying the combustion air. The oxygen-adding pipes 403 are connected to an external oxygen supply device and are set up to add oxygen into the treatment box 401, thereby increasing the oxygen content of the combustion air. The serpentine pipes 405 are connected to the exhaust gas structure of the rotary kiln. The waste heat of the exhaust gas of the rotary kiln is recovered and reused through the serpentine pipes 405, thereby achieving preheating of the combustion air.

[0041] Furthermore, a filter screen 401a is fixedly connected to the air inlet end of the treatment box 401, and an air collection hood 401b is fixedly connected to the air outlet end of the treatment box 401. A second connecting pipe 401c is fixedly connected to the air collection hood 401b, and the end of the second connecting pipe 401c away from the air collection hood 401b is fixedly connected to the air inlet end of the centrifugal fan 2.

[0042] The top and bottom of the packing frame 402 extend to the upper and lower sides of the processing box 401, respectively. Ventilation holes 402a are provided on both outer walls of the packing frame 402. An upper cover plate 402b is snapped onto the upper inner side of the packing frame 402, and a lower cover plate 402c is snapped onto the lower inner side of the packing frame 402.

[0043] One end of the oxygen supply pipe 403 is fixedly connected to an oxygen supply nozzle 403a, and the other end of the oxygen supply pipe 403 is fixedly connected to a third connecting pipe 403b. The end of the third connecting pipe 403b away from the oxygen supply pipe 403 extends to the front and rear ends of the outer side of the processing box 401, and the section of the third connecting pipe 403b located on the outer side of the processing box 401 is fixedly connected to a first synchronous pulley 403c.

[0044] A dual-axis motor 404 is fixedly connected to the top center of the processing box 401 via a motor frame 404a. A transmission rod 404b is fixedly connected to the output shaft of the dual-axis motor 404. A second synchronous pulley 404c is fixedly connected to the end of the transmission rod 404b away from the dual-axis motor 404. The second synchronous pulley 404c is connected to the first synchronous pulley 403c via a synchronous belt 404d.

[0045] One end of the serpentine tube 405 extends to the outer rear end of the processing box 401 and is fixedly connected to the splitter 405a. The other end of the serpentine tube 405 extends to the outer front end of the processing box 401 and is fixedly connected to the merger 405b.

[0046] The rest of the structure is the same as in Example 1.

[0047] The operation process of this embodiment is as follows: start the centrifugal fan 2, introduce external air into the treatment box 401 through the centrifugal fan 2, dehumidify the combustion air through the water-absorbing packing in the packing frame 402, and deliver oxygen into the treatment box 401 through the oxygen supply pipe 403 and oxygen supply nozzle 403a, thereby increasing the oxygen content of the combustion air. The serpentine pipe 405 is connected to the exhaust gas structure of the rotary kiln through the distributor 405a and the confluencer 405b, thereby preheating the combustion air through the waste heat of the exhaust gas of the rotary kiln, thus realizing the pretreatment of the combustion air.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it.

Claims

1. A rotary kiln combustion air intake structure, comprising a fixed plate (1) and a centrifugal fan (2), characterized in that: An air inlet assembly (3) is provided on the fixed plate (1), and the air inlet assembly (3) includes a distribution plate (301) fixedly connected to the side of the fixed plate (1) away from the centrifugal fan (2) and a sleeve (302) penetrating the fixed plate (1). The distribution plate (301) is fixedly connected to multiple expansion joints (303) through branch pipes (301a), and the ends of the expansion joints (303) away from the distribution plate (301) are all fixedly connected to air inlet nozzles (304). The sleeve (302) is internally threaded with a threaded rod (306), and one end of the threaded rod (306) is fixedly connected to a handwheel (306a). The other end is fixedly connected to a movable plate (305), and the movable plate (305) is fixedly connected to the outer wall of the air inlet nozzle (304). A pretreatment component (4) is provided on the side of the centrifugal fan (2) away from the fixed plate (1), and the pretreatment component (4) includes a treatment box (401) located on the side of the centrifugal fan (2) away from the fixed plate (1). A packing frame (402) for filling water-absorbing packing is fixedly connected to one side of the inside of the treatment box (401), and oxygenation pipes (403) are movably connected to the front and rear ends of the center inside the treatment box (401). Multiple serpentine pipes (405) are fixedly connected to the other side of the inside of the treatment box (401).

2. A combustion air inlet structure for a rotary kiln according to claim 1, wherein The first connecting pipe (301b) is fixedly connected to the side of the diverter plate (301) near the fixed plate (1), and the end of the first connecting pipe (301b) away from the diverter plate (301) passes through the fixed plate (1) and is fixedly connected to the air outlet of the centrifugal fan (2).

3. The rotary kiln combustion air inlet structure according to claim 1, characterized in that, A slide rod (305a) is fixedly connected to the outer wall of the movable plate (305) near the fixed plate (1), and the end of the slide rod (305a) away from the movable plate (305) passes through the fixed plate (1) and is threadedly connected to a limit nut (305b).

4. A combustion air inlet structure for a rotary kiln according to claim 1, wherein The air inlet of the treatment box (401) is fixedly connected to a filter screen (401a), and the air outlet of the treatment box (401) is fixedly connected to an air collector hood (401b). A second connecting pipe (401c) is fixedly connected to the air collector hood (401b), and the end of the second connecting pipe (401c) away from the air collector hood (401b) is fixedly connected to the air inlet of the centrifugal fan (2).

5. The rotary kiln combustion air inlet structure according to claim 1, characterized in that, The top and bottom of the packing frame (402) extend to the upper and lower sides of the processing box (401), respectively, and ventilation holes (402a) are provided on both outer walls of the packing frame (402). An upper cover plate (402b) is snapped onto the upper inner side of the packing frame (402), and a lower cover plate (402c) is snapped onto the lower inner side of the packing frame (402).

6. The rotary kiln combustion air inlet structure according to claim 1, characterized in that, One end of the oxygenation pipe (403) is fixedly connected to an oxygenation nozzle (403a), and the other end of the oxygenation pipe (403) is fixedly connected to a third connecting pipe (403b). The end of the third connecting pipe (403b) away from the oxygenation pipe (403) extends to the front and rear ends of the outer side of the processing box (401), and a section of the third connecting pipe (403b) located outside the processing box (401) is fixedly connected to a first synchronous pulley (403c).

7. The rotary kiln combustion air inlet structure according to claim 6, characterized in that, A dual-axis motor (404) is fixedly connected to the top center of the processing box (401) via a motor frame (404a), and a transmission rod (404b) is fixedly connected to the output shaft of the dual-axis motor (404). A second synchronous pulley (404c) is fixedly connected to the end of the transmission rod (404b) away from the dual-axis motor (404), and the second synchronous pulley (404c) is connected to the first synchronous pulley (403c) via a synchronous belt (404d).

8. The rotary kiln combustion air inlet structure according to claim 1, characterized in that, One end of the serpentine tube (405) extends to the outer rear end of the processing box (401) and is fixedly connected to the splitter (405a), and the other end of the serpentine tube (405) extends to the outer front end of the processing box (401) and is fixedly connected to the merger (405b).

Images