Rotary kiln sealing device

Abstract

The utility model discloses a rotary kiln sealing device which comprises a rotary kiln fixing part, a kiln body rotationally connected with the rotary kiln fixing part, a telescopic sealing mechanism arranged outside the position between the rotary kiln fixing part and the kiln body, and a connecting mechanism arranged between the telescopic sealing mechanism and the rotary kiln fixing part. The telescopic sealing mechanism is arranged on the outer side of the rotary joint of the kiln head and the kiln tail at the two ends of the rotary kiln, sealing treatment is carried out on the gap of rotary connection of the two ends of the rotary kiln, external cold air entering the kiln body is reduced, meanwhile, high-temperature gas and materials in the kiln body are prevented from leaking out, energy consumption of the rotary kiln is reduced, and the service life of the rotary kiln is prolonged. The elastic metal hose seals the gap between the rotary kiln body and the rotary kiln body, and meanwhile, the elastic metal hose can stretch out and draw back within a certain range, can longitudinally and freely move and can compensate radial run-out generated during kiln body machining.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary kiln technical field, especially a rotary kiln sealing device. BACKGROUND

[0002] Rotary kiln refers to rotary calcining kiln (commonly known as rotary kiln), and belongs to building material equipment class rotary kiln, which is a kind of large industrial equipment, and is widely used in high-temperature continuous processing process, and the core design realizes efficient thermochemical reaction or physical treatment through the synergistic effect of rotating cylinder, heat transfer and material movement, rotary kiln is widely used in many production industries such as building materials, metallurgy, chemical industry and environmental protection, and rotary cylindrical equipment is used to mechanically, physically or chemically treat solid materials, the sealing device between the kiln head, the kiln tail and the cylinder is used to reduce the entry of external cold air into the kiln body, prevent the leakage of high-temperature gas and material in the kiln body, reduce energy consumption and avoid the impact on the surrounding environment.

[0003] The existing rotary kiln sealing device mainly uses fish scale sheet and other radial seals, and sealing pressure bottom, which cannot guarantee the pressure of rotary kiln, and material and tail gas are prone to leakage.

[0004] A rotary kiln with flexible sealing is disclosed in the Chinese patent document with publication number CN208998526U, which includes a kiln head cover, a preheating smoke chamber and a kiln cylinder body arranged between the kiln head cover and the preheating smoke chamber, the kiln cylinder body is inclined downward at one end of the kiln head cover, and the both ends of the kiln cylinder body are provided with sealing devices, the sealing device includes a sleeve, a static sealing ring, a movable sealing ring and multiple groups of radial labyrinth seals, the static sealing ring and the movable sealing ring are sealed with a fish scale sealing structure composed of multiple spring sheets, the multiple groups of radial labyrinth seals are staggered arranged in the gap between the sleeve and the kiln cylinder body, the preheating smoke chamber is provided with a fixed seat at the bottom, the kiln head cover is provided with a support frame at the bottom, and the upper surfaces of the fixed seat and the support frame are provided with dust falling devices on both sides. In the above-mentioned utility model, the spring sheet of the sealing is not easy to be impacted by high-speed hot gas flow, the sealing effect is good, and once the material leaks, it can be treated in time to avoid pollution of the environment, but the rotary kiln with flexible sealing has a complex structure, and the radial movement adaptation ability between the kiln body and the kiln head is poor.

[0005] In order to solve the above-mentioned problems existing in the prior art, a rotary kiln sealing device is provided, which is a problem worthy of study. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the shortcomings that the existing rotary kiln sealing device mainly uses fish scale sheet and other radial seals, sealing pressure bottom, which cannot guarantee the pressure of rotary kiln, and material and tail gas are prone to leakage, and provides a rotary kiln sealing device, which realizes the technical effect of improving the sealing property and the flexibility of contact part by using flexible hose.

[0007] The utility model discloses a rotary kiln sealing device, including rotary kiln fixed part, and with rotary kiln fixed part rotation connection kiln body, still including the telescopic sealing mechanism of setting between rotary kiln fixed part and kiln body outside, and the link mechanism of setting between telescopic sealing mechanism and rotary kiln fixed part.

[0008] A rotary kiln sealing device, comprising a rotary kiln fixed part, and a kiln body rotationally connected with the rotary kiln fixed part, further comprising a telescopic sealing mechanism arranged outside between the rotary kiln fixed part and the kiln body, and a link mechanism arranged between the telescopic sealing mechanism and the rotary kiln fixed part.

[0009] The rotary kiln fixed part comprises a rotary kiln head and a rotary kiln tail, which are rotationally connected with the two ends of the kiln body respectively, preventing the high-temperature gas and materials in the kiln body from leaking out, thereby reducing the energy consumption of the rotary kiln and avoiding the influence of the leakage of the rotary kiln on the surrounding environment.

[0010] The telescopic sealing part comprises an elastic metal hose sleeved outside the gap between the rotary kiln fixed part and the kiln body, the diameter of the elastic metal hose is greater than the diameter of the kiln body, and the diameter difference between the elastic metal hose and the kiln body is less than five centimeters. The elastic metal hose sealing can compensate for the influence caused by thermal expansion deformation to a certain extent, avoid stress concentration caused by displacement of the traditional rigid sealing, and effectively attenuate the vibration of the kiln body, thereby reducing the risk of abnormal wear of the transmission gear.

[0011] The inside of the elastic metal hose is provided with a ceramic fiber heat insulation layer, and the outer surface of the elastic metal hose is provided with an aluminum infiltration treatment layer. By arranging the ceramic fiber heat insulation layer inside, the heat preservation performance of the rotary kiln can be improved, heat loss can be reduced, and the heat resistance of the elastic metal hose can be improved.

[0012] The telescopic sealing mechanism comprises a telescopic sleeve sleeved outside the gap between the fixed part and the kiln body, and the telescopic stroke of the telescopic sleeve is greater than the longitudinal displacement of the rotary kiln during use.

[0013] The link mechanism comprises a sealing ring fixedly connected to the inner side of the two ends of the telescopic sealing mechanism.

[0014] One end of the telescopic sealing mechanism is fixedly connected with the kiln body through the sealing ring, and the sealing flange is rotationally connected to the end face of the sealing ring at the other end of the telescopic sealing mechanism, and the end of the sealing flange is fixedly connected with the rotary kiln fixed part. The sealing ring further improves the sealing performance between the two ends of the telescopic sealing mechanism and the rotary kiln, and improves the kiln pressure that the sealing device can withstand.

[0015] A graphite packing is arranged between the inner side of the sealing flange and the rotary kiln fixed part, and the shape of the graphite packing is matched with the shape of the gap between the sealing flange and the rotary kiln fixed part. When the graphite packing contacts with the rotating parts such as shaft, the friction coefficient is low, which can reduce the energy loss during equipment operation and reduce the wear of the parts. The use of graphite packing is helpful for the long-term stable operation of the rotary kiln equipment.

[0016] Positive beneficial effects:

[0017] 1. The rotary kiln sealing device, the rotary kiln head and the rotary kiln tail rotating joint outside the outer side of the rotary kiln head and the rotary kiln tail rotating joint are provided with the telescopic sealing mechanism, the gap between the rotary kiln head and the rotary kiln tail rotating joint is sealed, the cold air outside is prevented from entering the rotary kiln body, the high-temperature gas and the material in the rotary kiln body are prevented from leaking out, the energy consumption of the rotary kiln is reduced, and the influence of the rotary kiln leakage on the surrounding environment is avoided.

[0018] 2. The rotary kiln sealing device, the elastic metal hose seals the gap between the two, and the elastic metal hose can be telescopic within a certain range, can move freely longitudinally, and can compensate for the radial runout generated during the processing of the rotary kiln body.

[0019] 3. The rotary kiln sealing device, the sealing ring is arranged at the two ends of the telescopic sealing mechanism, the sealing property between the two ends of the telescopic sealing mechanism and the rotary kiln is further improved, and the kiln pressure that can be borne by the sealing device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model;

[0021] Figure 2 It is a structural schematic view of the utility model Figure 1 enlarged structural schematic view of A in the utility model;

[0022] Figure 3 It is a structural schematic view of the second embodiment of the utility model.

[0023] In the figure: 1 is a rotary kiln fixed part, 2 is a rotary kiln body, 3 is an elastic metal hose, 4 is a telescopic sleeve, 5 is a sealing ring, 6 is a sealing flange, and 7 is a graphite packing. DETAILED DESCRIPTION

[0024] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model. Embodiment 1

[0025] As Figures 1 to 3 shown, a rotary kiln sealing device, comprising a rotary kiln fixed part 1, and a rotary kiln body 2 rotatably connected with the rotary kiln fixed part 1, further comprising a telescopic sealing mechanism arranged outside the rotary kiln fixed part 1 and the rotary kiln body 2, and an interface mechanism arranged between the telescopic sealing mechanism and the rotary kiln fixed part 1.

[0026] AsFigure 1 As shown, the rotary kiln fixed part 1 includes a rotary kiln head and a rotary kiln tail, which are respectively connected with the two ends of the kiln body, and the rotary kiln head and the rotary kiln tail are connected with the two ends of the kiln body through the rotary connection of the kiln head and the kiln tail at the two ends of the rotary kiln. By setting the telescopic sealing mechanism outside the rotary connection of the kiln head and the kiln tail at the two ends of the rotary kiln, the gap between the rotary connection of the kiln head and the kiln tail at the two ends of the rotary kiln is sealed, which reduces the entry of cold air from the outside into the kiln body and prevents the high-temperature gas and materials in the kiln body from leaking out, thereby reducing the energy consumption of the rotary kiln and avoiding the impact of the leakage of the rotary kiln on the surrounding environment.

[0027] As shown in the figure, Figures 1 to 2 The telescopic sealing part includes an elastic metal hose 3 sleeved outside the gap between the rotary kiln fixed part 1 and the kiln body 2. The diameter of the elastic metal hose 3 is greater than the diameter of the kiln body 2, and the diameter difference between the elastic metal hose 3 and the kiln body 2 is less than five centimeters. By setting the elastic metal hose 3 between the rotary kiln fixed part 1 and the kiln body 2, the gap between the two is sealed, and at the same time, the elastic metal hose 3 can be telescopic within a certain range, which can not only move freely longitudinally, but also compensate for the radial runout caused by the processing of the kiln body. Compared with the fish scale sealing structure, the elastic metal hose 3 can withstand a kiln pressure of 60 Pa, and the elastic metal hose 3 can withstand a greater pressure. The elastic sealing can adjust the sealing pressure according to the needs, which creates conditions for automatic control and avoids the leakage of materials or gas caused by excessive kiln pressure.

[0028] Further, the kiln body will expand and deform to a certain extent during operation. The use of the elastic metal hose 3 sealing can compensate for the impact of thermal expansion and deformation to a certain extent, avoid stress concentration caused by displacement of traditional rigid sealing, and the corrugated pipe structure can also effectively attenuate the vibration of the kiln body and reduce the risk of abnormal wear of the transmission gear.

[0029] As shown in the figure, Figures 1 to 3 The inside of the elastic metal hose 3 is provided with a ceramic fiber heat insulation layer, and the outer surface of the elastic metal hose 3 is provided with an aluminum infiltration treatment layer. By setting the ceramic fiber heat insulation layer inside, the heat preservation performance of the rotary kiln can be improved, the heat loss can be reduced, and the heat resistance of the elastic metal hose 3 can be improved, so that it can guarantee stability for a long time in a high-temperature environment. The setting of the infiltration treatment layer on the outer surface of the elastic metal hose 3 can reduce the high-temperature sulfur corrosion rate by 90%, improve the corrosion resistance of the structure, and prolong the service life. Example 2

[0030] As shown in the figure, Figure 3 The telescopic sealing mechanism includes a telescopic sleeve 4 sleeved outside the gap between the fixed part 1 and the kiln body 2. The telescopic stroke of the telescopic sleeve 4 is greater than the longitudinal displacement of the rotary kiln during use. By setting the telescopic sleeve 4 between the rotary kiln fixed part 1 and the kiln body 2, the rotary gap of the rotary kiln is further sealed to avoid the leakage of materials or gas caused by excessive kiln pressure during the operation of the rotary kiln. Embodiment 3

[0031] As Figures 1 to 2 shown, the adapter mechanism includes sealing rings 5 fixedly connected to the inner sides of the two ends of the telescopic sealing mechanism;

[0032] One end of the telescopic sealing mechanism is fixedly connected to the kiln body 2 through the sealing ring 5, and the end face of the sealing ring 5 at the other end of the telescopic sealing mechanism is rotatably connected to a sealing flange 6, which is fixedly connected to the end of the rotary kiln fixed part 1.

[0033] Further, the sealing ring 5 is a rubber sealing ring or a graphite sealing ring, and the end of the telescopic sealing mechanism close to the kiln body adopts a rubber sealing ring to increase the friction between the two and improve the stability of the fixed connection, and the end of the telescopic sealing mechanism close to the sealing flange 6 adopts a graphite sealing ring to reduce the friction between the two and make the rotation between the sealing flange and the sealing ring more smooth.

[0034] As Figures 1 to 2 shown, a graphite packing 7 is arranged between the inner side of the sealing flange 6 and the rotary kiln fixed part 1, and the shape of the graphite packing 7 is adapted to the shape of the gap between the sealing flange 6 and the rotary kiln fixed part 1.

[0035] The working principle of the utility model is as follows:

[0036] S1, the gap between the two ends of the rotary kiln is sealed to reduce the entry of cold air into the kiln body and prevent the leakage of high-temperature gas and material in the kiln body;

[0037] S2, the elastic metal hose 3 seals the gap between the two, and at the same time, the elastic metal hose 3 can stretch and contract within a certain range, which can not only move freely longitudinally, but also compensate for the radial runout generated during the processing of the kiln body;

[0038] S3, the sealing ring 5 is further added to improve the sealing performance between the two ends of the telescopic sealing mechanism and the rotary kiln, and the kiln pressure that the sealing device can withstand is improved.

[0039] The above merely aims to explain the technical scheme of the present application and is not intended to limit the present application. Other modifications or equivalent replacements made by those skilled in the art to the technical scheme of the present application, as long as they do not depart from the spirit and scope of the present application, should be included in the scope of the claims of the present application.

Claims

1. A rotary kiln sealing device, comprising a rotary kiln fixed part (1) and a kiln body (2) rotationally connected with the rotary kiln fixed part (1), characterized in that: The utility model also comprises a telescopic sealing mechanism arranged outside between the rotary kiln fixed part (1) and the kiln body (2), and a connecting mechanism arranged between the telescopic sealing mechanism and the rotary kiln fixed part (1).

2. A rotary kiln sealing device according to claim 1, characterised in that: The rotary kiln fixed part (1) comprises a rotary kiln head and a rotary kiln tail, and the rotary kiln head and the rotary kiln tail are respectively rotationally connected with two ends of the kiln body.

3. A rotary kiln sealing device according to claim 1, wherein: The telescopic sealing part comprises an elastic metal hose (3) sleeved outside the gap between the rotary kiln fixed part (1) and the kiln body (2), the diameter of the elastic metal hose (3) is greater than the diameter of the kiln body (2), and the diameter difference between the elastic metal hose (3) and the kiln body (2) is less than five centimeters.

4. A rotary kiln sealing device according to claim 3, wherein: The elastic metal hose (3) is internally provided with a ceramic fiber heat insulation layer, and the outer surface of the elastic metal hose (3) is provided with an aluminized treatment layer.

5. A rotary kiln sealing device according to claim 1, wherein: The telescopic sealing mechanism comprises a telescopic sleeve (4) sleeved outside the gap between the fixed part (1) and the kiln body (2), and the telescopic stroke of the telescopic sleeve (4) is greater than the longitudinal displacement of the rotary kiln in the use process.

6. A rotary kiln sealing device according to claim 1, wherein: The connecting mechanism comprises a sealing ring (5) fixedly connected to the inner side of two ends of the telescopic sealing mechanism; one end of the telescopic sealing mechanism is fixedly connected with the kiln body (2) through the sealing ring (5); and the end face of the sealing ring (5) of the other end of the telescopic sealing mechanism is rotationally connected with a sealing flange (6), and the sealing flange (6) is fixedly connected with the end part of the rotary kiln fixed part (1).

7. A rotary kiln sealing device according to claim 6, characterised in that: A graphite packing (7) is arranged between the inner side of the sealing flange (6) and the rotary kiln fixed part (1), and the shape of the graphite packing (7) is adapted to the shape of the gap between the sealing flange (6) and the rotary kiln fixed part (1).

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