Sealing structure of a horizontal rotary pyrolysis kiln

Abstract

The present invention provides a sealing structure of a horizontal rotary pyrolysis kiln, and relates to a sealing technology of a hot sealing cover of a horizontal rotary kiln. By arranging a movable heat-insulating sealing ring, a heat-insulating cavity is formed between the movable heat-insulating sealing ring and a flexible sealing mechanism, and the heat-insulating cavity can effectively block the heat dissipated from the kiln tail cover and the kiln tail, and effectively reduce the ambient temperature of the flexible sealing mechanism in the heat-insulating cavity, which helps to increase the service life of the flexible sealing mechanism, thereby ensuring the effectiveness of the seal.

Description

Technical Field

[0001] The invention relates to a sealing technology for a hot sealing cover of a horizontal rotary kiln, and in particular to a sealing structure of a horizontal rotary pyrolysis kiln. Background Art

[0002] In the field of coal pyrolysis, the sealing of the lower material cover of the horizontal rotary kiln is one of the most critical safety and environmental protection technologies. The existing technology uses fish scale sealing technology to seal the lower material cover, but this fish scale seal cannot completely seal the coal gas in the field of coal pyrolysis, which poses a major safety hazard; there is also a method of using flexible connection plus rubber sealing to seal the lower material cover, but although this method can achieve complete sealing, the durability of the flexible sealing material is limited and the service life is short.

[0003] The patent for the rotary sealing mechanism with publication number CN106482506A has a labyrinth-type dust-blocking and heat-insulating wall in front of the "flexible connector", but since the labyrinth-type dust-blocking and heat-insulating wall is in a high-temperature environment for a long time, the "flexible connector" will inevitably be in a relatively high-temperature environment. In actual production, there is a problem of short service life of the flexible connector. In some cases, the flexible connector may even leak, which seriously affects the sealing effect of the sealing mechanism.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a sealing structure of a horizontal rotary pyrolysis kiln to solve the above technical problems.

[0006] The present invention is achieved in that:

[0007] A sealing structure of a horizontal rotary pyrolysis kiln, arranged between a kiln tail cover and a kiln tail, comprises:

[0008] A support frame is fixedly connected to the outer periphery of the kiln tail; a rotary sealing mechanism is arranged on the support frame, and the rotary sealing mechanism is in rotary sealing contact with the support frame;

[0009] The rotary sealing mechanism comprises: a plurality of evenly distributed shift forks; a support seat rotatably connected to the support frame; a first position-limiting fitting fixed at one end to the outer periphery of the kiln tail cover; a movable heat-insulating sealing ring and a flexible sealing mechanism connected between the support seat and the first position-limiting fitting;

[0010] The shift fork is spatially located outside the flexible sealing mechanism, one end of the shift fork is fixedly connected to the first limit fitting on the outer periphery of the kiln tail cover, and the other end of the shift fork is movably connected to the support seat; the movable heat insulation sealing ring is spatially located inside the flexible sealing mechanism;

[0011] One end of the movable heat-insulating sealing ring is fixedly connected to the support seat, and the other end of the movable heat-insulating sealing ring is movably connected to the first limiting fitting to form a heat-insulating cavity between the movable heat-insulating sealing ring and the flexible sealing mechanism.

[0012] The present invention arranges a movable heat-insulating sealing ring to form an insulating cavity between the movable heat-insulating sealing ring and the flexible sealing mechanism. The insulating cavity can effectively block the heat dissipated from the kiln tail cover and the kiln tail, and effectively reduce the ambient temperature of the flexible sealing mechanism in the insulating cavity, which helps to increase the service life of the flexible sealing mechanism and further ensure the effectiveness of the seal.

[0013] One end of the movable heat-insulating sealing ring is movably connected to the first limiting fitting. Such an arrangement can ensure that when the rotating sealing mechanism jumps up, down, left, or right, the movable heat-insulating sealing ring can be connected to the first limiting fitting by jumping left, right, or up and down, instead of the movable heat-insulating sealing ring being fixedly connected to the first limiting fitting, so that the flexible sealing mechanism can also move freely.

[0014] When in use, the support frame rotates coaxially with the kiln tail, while the support seat of the rotating sealing mechanism does not rotate coaxially with the support frame. When the kiln tail rotates eccentrically, the support seat jumps up and down and left and right. The jumping of the support seat then drives the end of the shift fork away from the first limit fitting to jump up and down and left and right. The jumping of the support seat is absorbed and resolved by the flexible sealing mechanism and the movable heat insulation sealing ring, so that the kiln tail cover remains fixed.

[0015] By setting a shift fork, the rotary sealing mechanism and the kiln tail can rotate relative to each other, but the rotary sealing mechanism itself does not rotate, and only vibrates when the kiln tail rotates eccentrically, so that the flexible sealing mechanism also only vibrates without generating torsional force, thereby extending the service life of the flexible sealing mechanism.

[0016] In a preferred embodiment of the present invention, the support seat includes a second position-limiting fitting member for connecting with the shift fork, the flexible sealing mechanism and the movable heat-insulating sealing ring respectively; the second position-limiting fitting member is ring-shaped.

[0017] In other embodiments, the second position-limiting fitting is in the shape of a vertical annular plate.

[0018] In a preferred embodiment of the present invention, a gas filling pipeline is provided on the second position-limiting fitting, and the gas filling pipeline is connected to the heat-insulating cavity to be filled with a gas medium.

[0019] The gas pressure between the flexible sealing mechanism and the movable heat-insulating sealing ring is kept greater than the pyrolysis gas pressure of the pyrolysis kiln; the optional gas medium of the inflation mechanism is: nitrogen, purified gas, or water vapor and other gases that do not react with the pyrolysis gas, preferably purified gas.

[0020] The gas filled into the heat-insulating cavity by the gas-filling pipeline not only further enhances the cooling effect of the flexible sealing mechanism, but also, when the movable heat-insulating sealing ring cannot be completely sealed, only the gas filled into the heat-insulating cavity enters the kiln tail, and not the other way around, so that the flexible sealing mechanism is not in a high temperature environment, which greatly extends the life of the flexible sealing mechanism. When the gas medium filled is coal gas, it helps to ensure the purity of the coal gas system and is beneficial for the coal gas not to reduce the calorific value.

[0021] In a preferred embodiment of the present invention, a second mounting hole is provided on the second position limiting fitting to mount the shift fork, one end of the shift fork passes through the second mounting hole and the outer periphery of the shift fork is in contact with the hole wall of the second mounting hole, and the second mounting hole reserves space for the shift fork to jump.

[0022] The gas pressure between the flexible sealing mechanism and the movable insulation sealing ring is set to be greater than the pyrolysis gas pressure of the pyrolysis kiln. When a certain gap exists between the movable contact end of the movable insulation sealing ring and the first limiting fitting (when the rotating sealing mechanism jumps), gas can flow out of the insulation cavity to prevent the pyrolysis gas of the pyrolysis kiln from entering the insulation cavity.

[0023] In a preferred embodiment of the present invention, the fork is provided with a compression mechanism on the outer side of the second mounting hole to press the second position limiting fitting toward the first position limiting fitting so that the movable thermal insulation sealing ring is kept in close fit with the first position limiting fitting; the compression mechanism is a spring compression mechanism or a rubber compression mechanism.

[0024] The function of the compression mechanism is to press the second limiting fitting piece toward the first limiting fitting piece so that the movable heat-insulating sealing ring is kept in close contact, thereby keeping the heat-insulating cavity relatively tight.

[0025] The compression mechanism is a spring compression mechanism or rubber; the spring compression mechanism includes a spring seat, a compression spring, a pad, a gasket and a fixing screw. There are two spring seats, one of which is in contact with the second limiting fitting, and the other spring seat is arranged away from the second limiting fitting. The compression spring is located between the two spring seats. A pad is arranged on the outer side of the spring seat away from the second limiting fitting, and a gasket is arranged on the side of the pad away from the compression spring. The fixing screw is fixedly connected to the end of the elastic fork to compress the gasket, the pad and the compression spring.

[0026] The fixing screw is fixedly connected to the end of the elastic fork to compress the gasket, the pad and the compression spring, and then compress the second limit fitting to approach the first limit fitting, so that the movable contact end face of the movable thermal insulation sealing ring is close to the sealing surface of the first limit fitting, thereby insulating the flexible sealing mechanism.

[0027] In a preferred embodiment of the present invention, an oil supply pipeline is further provided near the second position-limiting fitting of the movable heat-insulating sealing ring to reduce the friction between the movable heat-insulating sealing ring and the first position-limiting fitting.

[0028] In a preferred embodiment of the present invention, one end of the first position-limiting fitting away from the shift fork is connected to a kiln tail cover water tank, and the kiln tail cover water tank is fixedly installed on the end of the kiln tail cover close to the second position-limiting fitting.

[0029] The kiln tail hood water tank is installed on the kiln tail hood so that the temperature of the gas can be cooled down in advance when it reaches the sealing part, thus ensuring the reliability of the seal.

[0030] The support frame fixedly arranged at the outer periphery of the kiln tail is also provided with an adjusting screw, through which the vibration of the annular sealing surface of the support frame during the rotation of the kiln tail is adjusted to the minimum. This arrangement is conducive to reducing the vibration of the rotary sealing mechanism, thereby reducing the amplitude of the vibration of the flexible sealing mechanism and extending the service life of the flexible sealing mechanism. In addition, the provision of the support frame will also reduce the friction between the rotary sealing mechanism and the support frame, extending the service life of the rotary sealing mechanism.

[0031] Furthermore, the outer peripheral annular sealing surface of the support frame is provided with Si 3 N 4 The material has a surface roughness of less than 0.4 microns. This material is not only hard, but also self-lubricating and has a very small surface friction coefficient. This setting helps to increase the service life of the entire rotary sealing mechanism.

[0032] In a preferred embodiment of the present invention, the support seat comprises: a second position-limiting fitting part movably connected to the shift fork; a left annular groove fixedly connected to the second position-limiting fitting part;

[0033] One end of the left annular groove away from the second position-limiting fitting is fixedly connected with a flexible sealing mechanism.

[0034] This embodiment helps to shorten the axial length of the movable heat-insulating sealing ring and the flexible sealing mechanism.

[0035] In a preferred embodiment of the present invention, a right annular groove is connected to the end of the first limiting fitting close to the kiln tail hood, and one end of the right annular groove away from the first limiting fitting is fixedly connected to one end of the flexible sealing mechanism; a movable heat-insulating sealing ring is arranged between the left annular groove and the right annular groove, and the movable end of the movable heat-insulating sealing ring is movably connected to the friction ring arranged on the right annular groove.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention provides a sealing structure of a horizontal rotary pyrolysis kiln. The present invention sets a movable heat-insulating sealing ring to form an insulating cavity between the movable heat-insulating sealing ring and a flexible sealing mechanism. The insulating cavity can effectively block the heat dissipated from the kiln tail cover and the kiln tail, and effectively reduce the ambient temperature of the flexible sealing mechanism in the insulating cavity, which helps to improve the service life of the flexible sealing mechanism and further ensure the effectiveness of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of a sealing structure of a horizontal rotary pyrolysis kiln in Example 1;

[0040] Figure 2 yes Figure 1 A partial enlarged view of the rotary sealing mechanism;

[0041] Figure 3 Another sealing structure of the horizontal rotary pyrolysis kiln tail cover and the kiln tail in Example 2;

[0042] Figure 4 yes Figure 3 A partial enlarged view of the rotary sealing mechanism.

[0043] Icons: 100-horizontal rotary pyrolysis kiln body; 110-kiln tail; 120-insulation layer of horizontal rotary pyrolysis kiln tail cover; 200-kiln tail cover; 210-kiln tail cover cooling water tank; 300-rotary sealing structure; 310-kiln tail outer insulation layer; 320-support frame; 321-support frame inner ring; 322-adjustment plates on both sides of the support frame; 323-adjustment screws; 324-vertical sealing plate of the inner ring of the support frame; 325-lifting ear; 326-hole ring plate one outside the inner ring of the support frame; 327-ring plate two outside the inner ring of the support frame; 328-rotary sealing mechanism sealing liner; 329-fastening screws; 330-annular wear-resistant plate of the rotary sealing mechanism; 331-vertical annular plate one of the rotary sealing mechanism; 3 32-seal ring cavity; 333-seal ring spacer; 334-seal ring; 335-left friction ring support seat; 336-right friction ring support seat; 337-friction ring; 338-friction ring oil groove; 339-oil circuit; 340-left ring groove; 341-left packing; 342-kiln tail vertical annular plate 2; 343-right ring groove; 344-right packing; 345-movable heat-insulating seal ring; 346-friction ring of movable heat-insulating seal ring; 347-oil supply device; 348-flexible sealing mechanism; 349-inflating pipeline; 350-shift fork; 351-spring seat; 352-spring; 353-pad; 354-gasket; 355-fixing screw; 400-feeding port; 500-gas outlet. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0048] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Example 1

[0051] See also Figure 1 and Figure 2 , this embodiment provides a sealing structure of a horizontal rotary pyrolysis kiln. It includes: a horizontal rotary pyrolysis kiln body 100, a kiln tail 110, a kiln tail cover 200, and a rotary sealing structure 300. Among them, a solid material discharge port 400 after pyrolysis is arranged below the kiln tail cover 200, and a pyrolysis gas outlet 500 is arranged at the center of the end surface of the kiln tail. An insulation layer 120 of the horizontal rotary pyrolysis kiln tail cover is arranged on the periphery of the kiln tail cover 200. A kiln tail outer insulation layer 310 is arranged on the periphery of the kiln tail 110.

[0052] Reference Figure 1As shown, a support frame 320 is fixedly arranged on the outer periphery of the kiln tail 110, and the support frame 320 rotates synchronously with the kiln tail 110. The support frame 320 includes a support frame inner ring 321 arranged on the outer periphery of the kiln tail 110, adjustment plates 322 on both sides of the support frame, adjustment screws 323 on the adjustment plates, a support frame inner ring vertical sealing plate 324, a lifting ear 325, a perforated ring plate 1 326 outside the support frame inner ring, a ring plate 2 327 outside the support frame inner ring, a rotary sealing mechanism sealing liner 328 and a set screw 329.

[0053] The adjusting plates 322 on both sides of the support frame are composed of a plurality of slats, which are evenly distributed on the outer peripheries of both sides of the inner ring 321 of the support frame and welded to the inner ring 321 of the support frame. The adjusting plates 322 on both sides of the support frame are provided with threaded holes, and the adjusting screws 323 are screwed into the threaded holes on the adjusting plates 322 on both sides of the support frame. During installation and debugging, the adjusting screws 323 are screwed in and tightened to the outer wall of the kiln tail 110, and the inner ring 321 of the support frame and the outer wall of the kiln tail 110 can be adjusted by adjusting the adjusting screws 323 to adjust whether they need to be concentric.

[0054] The two ends of the vertical sealing plate 324 of the inner ring of the support frame are respectively sealed and welded to the outer wall of the kiln tail 110 and the end face of the inner ring 321 of the support frame; the inner circles of the perforated ring plate 1 326 and the ring plate 2 327 outside the inner ring of the support frame are respectively welded to the left and right sides of the inner ring 321 of the support frame. The sealing liner 328 of the rotary sealing mechanism is sleeved on the outer circles of the perforated ring plate 1 326 and the ring plate 2 327 outside the inner ring of the support frame, and sealed and welded.

[0055] In order to make the annular sealing surface smooth and wear-resistant, an annular wear-resistant plate 330 (Si 3 N 4 bearing shell). Si 3 N 4 The bearing shell can be divided into multiple pieces, each piece of Si 3 N 4 Bearing seal close to the rotary seal mechanism seal liner 328, Si 3 N 4 The bearing bush is provided with a screw hole, and the set screw 329 passes through the Si 3 N 4 The screw holes set on the bearing bushing will 3 N 4 The bearing shell is tightly connected with the sealing liner 328 of the rotary sealing mechanism.

[0056] The gap can be filled with heat-resistant and wear-resistant rubber. The purpose of adjusting the screw 323 is to make the rotary kiln rotate. 3 N 4 The runout of the outer surface of the bearing should be as small as possible.

[0057] The lifting lug 325 on the support frame 320 is welded to the rotary sealing mechanism sealing liner 328 for lifting.

[0058] Reference Figure 1 As shown, a rotary sealing structure 300 is arranged on the outer periphery of the annular sealing surface of the support frame 320. The rotary sealing structure 300 comprises a support seat (not shown) rotatably connected to the support frame 320, a shift fork 350, a second vertical annular plate 342 at the kiln tail (i.e., a first position-limiting fitting), a movable heat-insulating sealing ring 345 and a flexible sealing mechanism 348.

[0059] Reference Figure 2 As shown, the support seat includes a vertical annular plate 331 (i.e., the second limiting fitting) of the rotating sealing mechanism, a sealing ring cavity 332, a sealing ring spacer 333, a sealing ring 334, a left friction ring support seat 335, a right friction ring support seat 336, a friction ring 337, a friction ring oil groove 338 and an oil circuit 339.

[0060] The sealing ring cavity 332 is welded and sealed to the vertical annular plate 331 of the rotary sealing mechanism. Two sealing rings 334 are arranged in the sealing ring cavity 332 , and a sealing ring spacer 333 is arranged in the middle of the two sealing rings 334 .

[0061] In this embodiment, the two sealing rings 334 are both Y-shaped sealing rings. In other embodiments, J-shaped sealing rings or sealing rings of other shapes may also be provided as needed.

[0062] A boss is provided on one side of the left friction ring support seat 335 close to the sealing ring 334 , and the left friction ring support seat 335 and the sealing ring cavity 332 are connected by bolts so that the boss presses the sealing ring 334 and the sealing ring spacer 333 .

[0063] The right friction ring support seat 336 is arranged on the right side of the vertical annular plate 331 of the rotary sealing mechanism and is welded and sealed with the vertical annular plate 331 of the rotary sealing mechanism. Multiple friction rings 337 are respectively in the supports of the left friction ring support seat 335 and the right friction ring support seat 336.

[0064] The friction rings 337 are each provided with a friction ring oil groove 338 , and the oil passage 339 is communicated with the friction ring oil groove 338 and the oil grooves of the two sealing rings 334 .

[0065] The friction ring 337 and the two sealing rings 334 are respectively connected to the annular wear-resistant plate Si 3 N 4 The bearing bushes 300 undergo circumferential motion (rotational connection) and sealing friction. 3 N 4The bearing bush 300 has high hardness, a smooth surface and a self-lubricating function, so the entire rotary sealing structure 300 has a reliable sealing performance and a long service life.

[0066] A kiln tail cover cooling water tank 210 is fixedly connected to the kiln tail cover 200, and a kiln tail vertical annular plate 2 342 is fixedly connected to the kiln tail cover cooling water tank 210. Figure 2 As shown, the left side of the vertical annular plate 331 of the rotary sealing mechanism is movably connected to the shift fork 350.

[0067] The vertical annular plate 1 331 of the rotary sealing mechanism and the vertical annular plate 2 342 at the kiln tail are arranged opposite to each other, and a movable heat-insulating sealing ring 345 is arranged between the two.

[0068] The left end face of the movable heat-insulating sealing ring 345 is fixedly sealed with the vertical annular plate 1 331 of the rotary sealing mechanism, and the right end face is in contact with the vertical annular plate 2 342 at the kiln tail. In order to reduce the friction area, the right end face of the movable heat-insulating sealing ring 345 is set in an arc shape.

[0069] The flexible sealing mechanism 348 is arranged on the outer periphery of the movable thermal insulation sealing ring 345 , and spatially forms a thermal insulation chamber with the movable thermal insulation sealing ring 345 .

[0070] A shift fork 350 is provided on the vertical annular plate 1 331 of the rotary sealing mechanism and the vertical annular plate 2 342 at the kiln tail. One end of the shift fork 350 is fixedly connected to the vertical annular plate 2 342 at the kiln tail. The other end of the elastic shift fork 350 penetrates the vertical annular plate 1 331 of the rotary sealing mechanism, and the hole penetrating the vertical annular plate 1 331 of the rotary sealing mechanism leaves a movable spacing along the radial direction of the kiln. The shift fork 350 is an elastic shift fork.

[0071] The shift fork 350 is provided with a spring compression mechanism on the outer side of the vertical annular plate 331 of the rotary sealing mechanism.

[0072] Reference Figure 2 As shown, the spring compression mechanism includes a spring seat 351 , a spring 352 , a backing plate 353 , a gasket 354 and a fixing screw 355 .

[0073] In this embodiment, there are two spring seats 351. One is in contact with the second vertical annular plate 342 at the kiln tail, and the other is away from the second vertical annular plate 342 at the kiln tail. The spring 352 is located between the two spring seats 351, and a pad 353 is arranged outside the spring seat 351 away from the second vertical annular plate 342 at the kiln tail. A gasket 354 is arranged on the side of the pad 353 away from the spring 352. The fixing screw 355 is tightened by the thread of the end of the fork 350 to compress the gasket 354, the pad 353 and the compression spring 352, thereby compressing the first vertical annular plate 331 of the rotating sealing mechanism to approach the second vertical annular plate 342 at the kiln tail, so that the arc-shaped end face of the movable heat-insulating sealing ring 345 is in close contact with the sealing surface of the second vertical annular plate 342 at the kiln tail, which plays a role in heat insulation of the flexible sealing mechanism 348.

[0074] In order to further reduce the ambient temperature of the flexible sealing mechanism 348, an air filling pipeline 349 is provided on the vertical annular plate 1 331 of the rotary sealing mechanism. The air filling pipeline 349 is located between the movable heat insulation sealing ring 345 and the flexible sealing mechanism 348 in space.

[0075] The gas medium for inflation can be nitrogen or clean coal gas, preferably clean coal gas, which can make the pyrolysis coal gas purer.

[0076] In order to reduce the friction force of the arc-shaped end surface of the movable heat-insulating sealing ring 345 when the rotary kiln rotates and jumps, an oil supply device 347 is also provided on the movable heat-insulating sealing ring 345.

[0077] In order to strengthen the strength of the vertical annular plate 1 331 and the vertical annular plate 2 342 and the movable heat-insulating sealing ring 345 of the rotary sealing mechanism, reinforcing ribs may be appropriately added in other embodiments.

[0078] Example 2

[0079] Reference Figure 3 and Figure 4 As shown, unlike Example 1, Example 2 is based on Example 1. In order to shorten the axial length of the movable heat-insulating sealing ring 345 and the flexible sealing mechanism 348, a grooved circular ring is added between the vertical annular plate 1 331 of the rotating sealing mechanism and the vertical annular plate 2 342 at the kiln tail.

[0080] Correspondingly, a left annular groove 340, a left packing 341, a right annular groove 343, a right packing 344 and a friction ring 346 of a movable heat-insulating sealing ring are added; the left annular groove 340 is fixedly connected to a vertical annular plate 331 of a rotating sealing mechanism; one end of the left annular groove 340 away from the vertical annular plate 331 of the rotating sealing mechanism is fixedly connected to a flexible sealing mechanism 348.

[0081] The end of the kiln tail vertical annular plate 342 near the kiln tail cover is connected with a right annular groove 343, and one end of the right annular groove 343 away from the kiln tail vertical annular plate 342 is fixedly connected to one end of the flexible sealing mechanism 348; a movable heat insulation sealing ring 345 is arranged between the left annular groove 340 and the right annular groove 343, and the movable end of the movable heat insulation sealing ring 345 is movably connected to the friction ring 346 of the movable heat insulation sealing ring arranged on the right annular groove 343. The rest of the connection methods are the same as those in Example 1.

[0082] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing structure of a horizontal rotary pyrolysis kiln, arranged between the kiln tail cover and the kiln tail, characterized in that: It includes: A support frame fixedly connected to the outer periphery of the kiln tail; A rotary sealing mechanism is disposed on the support frame, and the rotary sealing mechanism is in rotary sealing contact with the support frame; The rotary sealing mechanism comprises: a plurality of evenly distributed shift forks; a support seat rotatably connected to the support frame; a first position-limiting fitting fixed at one end to the outer periphery of the kiln tail cover; a movable heat-insulating sealing ring and a flexible sealing mechanism connected between the support seat and the first position-limiting fitting; The shift fork is spatially located outside the flexible sealing mechanism, one end of the shift fork is fixedly connected to the first limiting fitting on the outer periphery of the kiln tail cover, and the other end of the shift fork is movably connected to the support seat; the movable heat-insulating sealing ring is spatially located inside the flexible sealing mechanism; One end of the movable heat-insulating sealing ring is fixedly connected to the support seat, and the other end of the movable heat-insulating sealing ring is movably connected to the first limiting fitting to form a heat-insulating cavity between the movable heat-insulating sealing ring and the flexible sealing mechanism.

2. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 1, characterized in that: The support seat includes a second position-limiting fitting member for connecting with the shift fork, the flexible sealing mechanism and the movable heat-insulating sealing ring respectively; the second position-limiting fitting member is ring-shaped.

3. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 2, characterized in that: The second position-limiting fitting is provided with an air-filling pipeline, which is connected with the heat-insulating cavity to be filled with a gas medium.

4. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 3, characterized in that: A second mounting hole is provided on the second position-limiting fitting, one end of the shift fork passes through the second mounting hole and the outer periphery of the shift fork is in contact with and connected to the hole wall of the second mounting hole, and a space is reserved in the second mounting hole for the shift fork to jump.

5. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 4, characterized in that: The shift fork is provided with a compression mechanism on the outer side of the second mounting hole to press the second limiting fitting piece toward the first limiting fitting piece so that the movable heat insulating sealing ring and the first limiting fitting piece are kept in close fit; the compression mechanism is a spring compression mechanism or a rubber compression mechanism; the spring compression mechanism comprises a spring seat, a compression spring, a pad, a gasket and a fixing screw, there are two spring seats, one of which abuts against the second limiting fitting piece, and the other spring seat is arranged away from the second limiting fitting piece, the compression spring is located between the two spring seats, the pad is arranged on the outer side of the spring seat away from the second limiting fitting piece, the gasket is arranged on the side of the pad away from the compression spring, and the fixing screw is fixedly connected to the end of the shift fork to compress the gasket, the pad and the compression spring.

6. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 5, characterized in that: The movable heat-insulating sealing ring is also provided with an oil supply pipeline near the second position-limiting fitting to reduce the friction between the movable heat-insulating sealing ring and the first position-limiting fitting.

7. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 1, characterized in that: One end of the first position-limiting fitting away from the shift fork is connected to a kiln tail cover water tank, and the kiln tail cover water tank is fixedly mounted on the end of the kiln tail cover close to the second position-limiting fitting.

8. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 7, characterized in that: The support seat comprises: a second position-limiting fitting part movably connected to the shift fork; and a left annular groove fixedly connected to the second position-limiting fitting part; The flexible sealing mechanism is fixedly connected to one end of the left annular groove away from the second position-limiting fitting; A right annular groove is connected to the end of the first limiting fitting close to the kiln tail cover, and one end of the right annular groove away from the first limiting fitting is fixedly connected to one end of the flexible sealing mechanism; the movable thermal insulation sealing ring is arranged between the left annular groove and the right annular groove, and the movable end of the movable thermal insulation sealing ring is movably connected to the friction ring arranged on the right annular groove.

9. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 1, characterized in that: The support frame is provided with an adjusting screw.

10. The sealing structure of the horizontal rotary pyrolysis kiln according to claim 1, characterized in that: The peripheral annular sealing surface of the support frame is made of Si3N4 material, and the surface roughness of the peripheral annular sealing surface is less than 0.4 microns.

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