Gas-solid separation structure of kiln system

Abstract

The utility model relates to the technical field of rotary kilns, in particular to a gas-solid separation structure of a kiln system. According to the technical scheme, the device comprises a bottom plate, a supporting cylinder, an ash discharging pipe, an annular pipe, an arc pipe, a smoke chamber and flow dividing covers, the smoke chamber is communicated with the supporting cylinder, the outer wall of the smoke chamber is sleeved with a sealing sleeve, the outer wall of the sealing sleeve is rotationally sleeved with a rotary kiln cylinder, the flow dividing covers distributed at equal intervals are communicated with the interior of the upper end of the supporting cylinder, and the flow dividing covers are communicated with the arc pipe. One end of the shunting cover is communicated with a connecting cover, one end of the connecting cover is communicated with an annular pipe, the lower end of the annular pipe is communicated with a connecting pipe, the lower end of the connecting pipe is communicated with an ash discharging pipe, a filter screen is arranged on the inner wall of the shunting cover, and the arc pipe is communicated with the smoke chamber. Flue gas in the conveying pipe is conveyed in a split-flow mode through the multiple split-flow covers, the content of pollutants in the flue gas is reduced in the conveying process, then the follow-up flue gas treatment intensity is reduced, and stable operation of a flue gas treatment system is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, and in particular to a gas-solid separation structure for a kiln system. Background Technology

[0002] Rotary kilns are important calcining equipment in cement production. They are used to calcine raw materials such as fly ash and limestone at high temperatures to produce cement clinker. Inside the rotary kiln, the raw materials undergo a series of physicochemical reactions and are gradually transformed into cement clinker under a continuous high-temperature environment.

[0003] In rotary kiln operation, these gases need to be effectively separated to ensure product quality and environmental hygiene. The solid cement produced by firing is discharged to a lower level. Due to design and technical limitations, the existing waste gas conveying structure cannot effectively handle these harmful components, resulting in significant pipeline erosion and affecting system operating efficiency. Therefore, we propose a gas-solid separation structure for the kiln system to solve the existing problems. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a gas-solid separation structure for a kiln system.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas-solid separation structure for a kiln system, comprising a bottom plate, a support cylinder, an ash discharge pipe, a ring pipe, an arc pipe, a smoke chamber, and a diversion hood. The smoke chamber is connected to the support cylinder. A sealing sleeve is fitted onto the outer wall of the smoke chamber. A rotary kiln cylinder is rotatably fitted onto the outer wall of the sealing sleeve. Diversion hoods are equidistantly distributed inside the upper end of the support cylinder. The diversion hoods are connected to the arc pipe. A connecting hood is connected to one end of the diversion hood. A ring pipe is connected to one end of the connecting hood. A connecting pipe is connected to the lower end of the ring pipe. An ash discharge pipe is connected to the lower end of the connecting pipe. A filter screen is provided on the inner wall of the diversion hood. The arc pipe is connected to the smoke chamber.

[0006] When using one of the gas-solid separation structures in this solution, one end of the rotary kiln cylinder is supported by a sealing sleeve, which causes the raw materials for cement to flow when the rotary kiln cylinder is firing cement. The flue gas from the firing process enters the smoke chamber, and some of the flue gas enters the diversion hood, then the arc pipe, and finally enters the smoke chamber. The flue gas inside the diversion hood is partially intercepted by the filter screen. When the flue gas is transported through the smoke chamber to the flue gas pipeline and enters the flue gas purification equipment such as the bag filter, the harmful substances in the flue gas are reduced, and the burden on the pipeline and the flue gas purification equipment is reduced.

[0007] When the rotary kiln cylinder rotates, the rotational force acts on the connecting rod, which in turn drives the mounting ring to rotate. This causes the extrusion block to apply pressure to one end of the guide rod. Because the rear end of the extrusion block's outer wall gradually increases towards one side, the resistance applied to the guide rod gradually increases, thus compressing the spring. The guide rod pushes the brush plate to move at the lower end of the filter screen, brushing the lower end of the filter screen. The dust adhering to the lower end of the filter screen falls off, and most of the dust is transported to the connecting hood through the guide plate and then collected downwards through the ring pipe. It is then transported to the ash discharge pipe through the connecting pipe. The motor drives the auger to rotate, which in turn augers the input dust and sends it to the ash box. The dust intercepted by the diversion hood is also collected.

[0008] Preferably, the upper end of the base plate is provided with a ash box communicating with the ash discharge pipe, and a closing plate is provided at the opening of one end of the ash box. The ash box collects dust, and the opening and closing of the ash box is controlled by the closing plate to clean the dust periodically.

[0009] Preferably, a motor is fixedly installed inside the upper end of the ash box, and an auger is rotatably installed inside the ash discharge pipe at the output end of the motor. When the motor operates, it drives the auger to rotate inside the ash discharge pipe, thereby pushing the dust.

[0010] Preferably, a connecting pipe is installed at the upper end of the ash discharge pipe, which is connected to the lower end of the ring pipe. The dust inside the ring pipe is guided to the connecting pipe and then transported to the ash discharge pipe.

[0011] Preferably, an installation ring is fitted onto the outer side of the support cylinder, and one end of the installation ring is provided with connecting rods arranged in a ring array and connected to the outer wall of the rotary kiln cylinder. The installation ring is connected and fixed to the outer side of the support cylinder by the connecting rods.

[0012] Preferably, one end of the mounting ring is provided with an extrusion block, and the outer wall thickness of the extrusion block gradually increases towards one side. Because the mounting ring is connected to the outer wall of the rotary kiln cylinder through a connecting rod, when the rotary kiln cylinder rotates, it drives the mounting ring to rotate, which in turn drives the extrusion block to rotate around the mounting ring as the center.

[0013] Preferably, a brush plate is provided at the lower end of the filter screen, and equidistantly distributed sliding sleeves are embedded inside one end of the flow divider. A guide rod that slides through the sliding sleeve is provided at one end of the brush plate. The brush plate moves with the guide rod, and the guide rod is slidably supported inside the flow divider by the sliding sleeve.

[0014] Preferably, a limiting ring is sleeved on the outer wall of one end of the guide rod outside the diverter. A spring with both ends connected to the limiting ring and the diverter is sleeved on the outer side of the guide rod. A guide plate with one end connected to the inner wall of the lower end of the connecting cover is provided on the inner wall of the diverter. One end of the spring is elastically supported by the limiting ring. The elastic force of the spring acts on the guide rod. When the spring extends or retracts, the guide rod moves inside the spring, guiding the spring and preventing spring deflection.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model incorporates a support cylinder between the rotary kiln and the flue gas chamber. When the support cylinder rotates and supports the kiln cylinder, the flue gas enters the flue gas chamber through the support cylinder. Multiple diversion hoods further divert the flue gas between the support cylinder and the flue gas chamber, leading to an arc pipe. The flue gas then enters the flue gas chamber through the arc pipe. This avoids situations where large flue gas flow and high internal dust content would overburden the flue gas treatment system. A multi-stage gas-solid separation unit is introduced, with filters installed in the diversion hoods to intercept some of the dust in the flue gas. This effectively reduces the damage of particulate matter in the rotary kiln system to subsequent equipment, pipelines, and facilities, extends equipment lifespan, and reduces the pollutant content in the flue gas delivered to the later-stage baghouse dust collector. Attached Figure Description

[0017] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a top sectional three-dimensional structural diagram of the ash discharge pipe of this utility model;

[0019] Figure 3 This is a top-view three-dimensional structural diagram of the arc tube of this utility model;

[0020] Figure 4 This is a side-view three-dimensional structural diagram of the arc tube of this utility model;

[0021] Figure 5 This is a three-dimensional cross-sectional view of the flow divider of this utility model.

[0022] Reference numerals in the attached diagram: 1. Base plate; 2. Rotary kiln cylinder; 3. Support cylinder; 4. Connecting rod; 5. Mounting ring; 6. Ash discharge pipe; 7. Ring pipe; 8. Arc pipe; 9. Smoke chamber; 10. Extrusion block; 11. Ash box; 12. Guide plate; 13. Screw auger; 14. Filter screen; 15. Motor; 16. Closing plate; 17. Sealing sleeve; 18. Brush plate; 19. Diverter hood; 20. Connecting cover; 21. Connecting pipe; 22. Spring; 23. Sliding sleeve; 24. Limiting ring; 25. Guide rod. Detailed Implementation

[0023] 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.

[0024] like Figures 1-5 As shown, the present invention proposes a gas-solid separation structure for a kiln system, including a bottom plate 1, a support cylinder 3, an ash discharge pipe 6, a ring pipe 7, an arc pipe 8, a smoke chamber 9, and a diversion hood 19. The smoke chamber 9 is connected to the support cylinder 3. A sealing sleeve 17 is fitted onto the outer wall of the smoke chamber 9. A rotary kiln cylinder 2 is rotatably fitted onto the outer wall of the sealing sleeve 17. The upper end of the support cylinder 3 is connected to the diversion hood 19, which is equidistantly distributed. The diversion hood 19 is connected to the arc pipe 8. One end of the diversion hood 19 is connected to a connecting cover 20. One end of the connecting cover 20 is connected to the ring pipe 7. The lower end of the ring pipe 7 is connected to a connecting pipe 21. The lower end of the connecting pipe 21 is connected to the ash discharge pipe 6. A filter screen 14 is provided on the inner wall of the diversion hood 19. The arc pipe 8 is connected to the smoke chamber 9.

[0025] A ash box 11 connected to the ash discharge pipe 6 is provided at the upper end of the base plate 1, and a closing plate 16 is provided at the opening of one end of the ash box 11.

[0026] A motor 15 is fixedly installed inside the upper end of the ash box 11, and an auger 13 is rotatably installed inside the ash discharge pipe 6 at the output end of the motor 15.

[0027] The upper end of the ash discharge pipe 6 is connected to the lower end of the ring pipe 7 by a connecting pipe 21;

[0028] Based on the implementation steps of Example 1: After combustion, the flue gas enters the smoke chamber 9. Part of the flue gas returns to the smoke chamber 9 after passing through the diversion hood 19 and the arc pipe 8, while the other part passes through the filter screen 14 to intercept dust before entering the flue gas duct and then into purification equipment such as a bag filter. This treatment method can effectively reduce the content of harmful substances in the flue gas, reduce the burden on the pipeline and purification equipment, and improve environmental protection.

[0029] like Figures 1-5 As shown, compared with Embodiment 1, the gas-solid separation structure of the kiln system proposed in this utility model further includes: an installation ring 5 sleeved on the outside of the support cylinder 3, and a connecting rod 4 arranged in a ring array and connected to the outer wall of the rotary kiln cylinder 2 at one end of the installation ring 5;

[0030] One end of the mounting ring 5 is provided with a pressing block 10, and the outer wall thickness of the pressing block 10 gradually increases towards one side.

[0031] A brush plate 18 is provided at the lower end of the filter screen 14, and a sliding sleeve 23 with equal spacing is embedded inside one end of the flow divider 19. A guide rod 25 that slides through the sliding sleeve 23 is provided at one end of the brush plate 18.

[0032] A limit ring 24 is sleeved on the outer wall of one end of the guide rod 25 outside the diverter 19. A spring 22 is sleeved on the outer side of the guide rod 25, with its two ends connected to the limit ring 24 and the diverter 19 respectively. A guide plate 12 is provided on the inner wall of the diverter 19, with one end connected to the lower inner wall of the connecting cover 20.

[0033] In this embodiment, when the rotary kiln rotates, the connecting rod 4 drives the mounting ring 5 to rotate, pushing the extrusion block 10 to apply pressure to one end of the guide rod 25. As the outer wall of the extrusion block 10 gradually increases, the resistance gradually increases, thereby driving the spring 22 to extrude and push the brush plate 18 to clean the lower end of the filter screen 14, causing the dust at the lower end of the filter screen 14 to fall off. This can effectively clean particulate matter in the flue gas. Before being conveyed to the ash discharge pipe 6, most of the dust will be collected and stored in the connecting cover 20, and a small portion will pass through the flue gas flow channel on one side of the guide plate 12 and continue to be intercepted by the filter screen 14 as the flue gas flow rises. The cleaning structure of the filter screen 14 does not require additional power; it only needs to be connected to the rotary kiln cylinder 2 to realize the use of the cleaning structure. After the guide rod 25 is used, it is reset by the spring 22, which in turn drives the brush plate 18 to reset. The upper end of the brush plate 18 is provided with a brush strip that contacts the filter screen 14 to brush off the dust adhering to the filter screen 14. The brush plate 18 resets with the guide rod 25, providing adjustment for cleaning the filter screen 14 again.

[0034] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas-solid separation structure for a kiln system, comprising a bottom plate (1), a support cylinder (3), an ash discharge pipe (6), a ring pipe (7), an arc pipe (8), a smoke chamber (9), and a flow divider (19), characterized in that: The smoke chamber (9) is connected to the support cylinder (3). A sealing sleeve (17) is fitted on the outer wall of the smoke chamber (9). A rotary kiln cylinder (2) is rotatably fitted on the outer wall of the sealing sleeve (17). The upper end of the support cylinder (3) is connected to a diverter hood (19) with equal spacing. The diverter hood (19) is connected to the arc pipe (8). One end of the diverter hood (19) is connected to a connecting cover (20). One end of the connecting cover (20) is connected to a ring pipe (7). The lower end of the ring pipe (7) is connected to a connecting pipe (21). The lower end of the connecting pipe (21) is connected to an ash discharge pipe (6). A filter screen (14) is provided on the inner wall of the diverter hood (19). The arc pipe (8) is connected to the smoke chamber (9).

2. The gas-solid separation structure of a kiln system according to claim 1, characterized in that: The bottom plate (1) is provided with a ash box (11) that communicates with the ash discharge pipe (6) at the upper end, and a closing plate (16) is provided at one end of the ash box (11).

3. The gas-solid separation structure of a kiln system according to claim 2, characterized in that: A motor (15) is fixed inside the upper end of the ash box (11), and an auger (13) is rotatably installed inside the ash discharge pipe (6) at the output end of the motor (15).

4. The gas-solid separation structure of a kiln system according to claim 1, characterized in that: The upper end of the ash discharge pipe (6) is connected to the lower end of the ring pipe (7) by a connecting pipe (21).

5. The gas-solid separation structure of a kiln system according to claim 1, characterized in that: An installation ring (5) is sleeved on the outside of the support cylinder (3). One end of the installation ring (5) is provided with a connecting rod (4) arranged in a ring array and connected to the outer wall of the rotary kiln cylinder (2).

6. The gas-solid separation structure of a kiln system according to claim 5, characterized in that: One end of the mounting ring (5) is provided with a pressing block (10), and the outer wall thickness of the pressing block (10) gradually increases towards one side.

7. The gas-solid separation structure of a kiln system according to claim 1, characterized in that: The filter screen (14) is provided with a brush plate (18) at its lower end. The flow divider (19) is internally fitted with equally spaced sliding sleeves (23). The brush plate (18) is provided with a guide rod (25) that slides through the sliding sleeves (23).

8. The gas-solid separation structure of a kiln system according to claim 7, characterized in that: The guide rod (25) is fitted with a limiting ring (24) on the outer wall of one end of the flow divider (19). A spring (22) is fitted on the outer side of the guide rod (25) and its two ends are respectively connected to the limiting ring (24) and the flow divider (19). A guide plate (12) is provided on the inner wall of the flow divider (19) and its end is connected to the inner wall of the lower end of the connecting cover (20).

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