Supporting structure of pyrolysis gas collecting pipe of rotary kiln

Abstract

The utility model provides a supporting structure of a pyrolysis gas collecting pipe of a rotary kiln, which relates to the technical field of pyrolysis and comprises a fixed supporting structure group and a sliding supporting structure group, and the fixed supporting structure group enables the relative position of the pyrolysis gas collecting pipe to be unchanged in the axis direction, the circumferential direction and the radial direction of the rotary kiln; the sliding supporting structure set enables the pyrolysis gas collecting pipe not to change in the radial relative position and the circumferential relative position of the pyrolysis gas collecting pipe, but allows the pyrolysis gas collecting pipe to generate relative displacement in the axis direction of the rotary kiln, and the thermal deformation probability and tearing of the pyrolysis gas collecting pipe are reduced. And meanwhile, impact and deformation of the supporting structure assembly are reduced. The technical problems that in the prior art, due to the fact that a thermal expansion and cold contraction compensation structure is not reasonable or has no compensation, the pyrolysis gas collecting pipe is torn, deformed and deviated from the center of the rotary kiln or the supporting structure is torn, twisted and deformed, and normal operation of the pyrolysis rotary kiln is damaged are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pyrolysis, in particular to a support structure for a pyrolysis gas collection pipe of a rotary kiln. Background Art

[0002] In a pyrolysis rotary kiln, due to the environment inside the kiln being at a high temperature, usually not exceeding 700°C, but the internal temperature distribution is not uniform, and the temperature may be adjusted during operation, the pyrolysis gas collection pipe and its connecting support structure inside the kiln often suffer from unreasonable or no thermal expansion and contraction compensation structure, resulting in the pyrolysis gas collection pipe being torn and deformed, deviating from the center of the rotary kiln, or the support structure being torn and distorted, thus damaging the normal operation of the pyrolysis rotary kiln and directly affecting the service life of the rotary kiln. It is necessary to solve the above problems.

[0003] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0004] The purpose of the present utility model is to provide a support structure for a pyrolysis gas collection pipe of a rotary kiln, so as to solve the technical problems in the prior art that the pyrolysis gas collection pipe and its connecting support structure often suffer from unreasonable or no thermal expansion and contraction compensation structure, resulting in the pyrolysis gas collection pipe being torn and deformed, deviating from the center of the rotary kiln, or the support structure being torn and distorted, damaging the normal operation of the pyrolysis rotary kiln and affecting the service life of the rotary kiln.

[0005] In order to achieve the above object of the present utility model, the following technical solutions are specifically adopted:

[0006] The present utility model provides a support structure for a pyrolysis gas collection pipe of a rotary kiln, including a fixed support structure group and a sliding support structure group

[0007] The fixed support structure group includes a plurality of fixed support structures evenly distributed along the circumferential direction of the pyrolysis gas collection pipe. The plurality of fixed support structures are located on a plane parallel to the radial direction of the pyrolysis gas collection pipe. The fixed support structure includes a leg I, a support leg I, and a limiting structure I for fixing the relative positions of the leg I and the support leg I. One end of the leg I is connected to the pyrolysis gas collection pipe, and the other end is connected to the support leg I. The end of the support leg I far from the leg I is connected to the rotary kiln;

[0008] The slip support structure group includes several slip support structures evenly distributed circumferentially around the pyrolysis gas collection pipe. The several slip support structures are located in a plane parallel to the radial direction of the pyrolysis gas collection pipe. The slip support structure includes leg II, support leg II connected to leg II, and a limit structure II for fixing the relative position of leg II and support leg II along the circumferential direction of the pyrolysis gas collection pipe. One end of leg II is connected to the pyrolysis gas collection pipe, and the other end is connected to support leg II. The end of support leg II far from leg II is connected to the rotary kiln.

[0009] A limit structure III is provided at the connection between leg II and support leg II for limiting the relative movement distance of leg II and support leg II along the axial direction of the pyrolysis gas collection pipe.

[0010] Further, a first gap is provided between leg I and support leg I for providing space for the thermal expansion of the pyrolysis gas collection pipe, leg I, and support leg I.

[0011] Further, leg I includes upper bracket I and upper backing plate I, and support leg I includes lower bracket I and lower backing plate I. The upper backing plate I and the lower backing plate I are connected by bolts.

[0012] The first gap is located between the upper backing plate I and the lower backing plate I.

[0013] Further, the limit structure I includes a first limit member I and a second limit member I provided at the connection between the upper bracket I and the upper backing plate I. The first limit member I is respectively located on the opposite sides perpendicular to the radial cross-section of the pyrolysis gas collection pipe at the connection between the upper bracket I and the upper backing plate I. The second limit member I is respectively located on the opposite sides parallel to the radial cross-section of the pyrolysis gas collection pipe at the connection between the upper bracket I and the upper backing plate I.

[0014] One ends of the first limit member I and the second limit member I are both fixedly connected to the upper backing plate I, and the other ends are both located outside the lower backing plate I. The first limit member I and the second limit member I are respectively in clearance fit with the lower backing plate I.

[0015] The gap between the adjacent surfaces of the first limit member I and the lower backing plate I is ≤ 0.2 mm.

[0016] The gap between the adjacent surfaces of the second limit member I and the lower backing plate I is ≤ 0.2 mm.

[0017] Further, the upper backing plate I is provided with upper screw holes I, and the lower backing plate is provided with lower screw holes I opposite to the upper screw holes I. The upper screw holes I and the lower screw holes I are connected by bolts.

[0018] The diameters of the upper screw hole I and the lower screw hole I are both larger than the diameter of the bolt, and the differences between the diameters of the upper screw hole I and the lower screw hole I and the diameter of the bolt are both ≤ 0.2 mm.

[0019] Further, a second gap is provided between the leg II and the support leg II to provide space for the thermal expansion of the pyrolysis gas collection pipe, the leg II and the support leg II.

[0020] Further, the leg II includes an upper bracket II and an upper backing plate II, the support leg II includes a lower bracket II and a lower backing plate II, and the upper backing plate II and the lower backing plate II are connected by bolts;

[0021] The second gap is located between the upper backing plate II and the lower backing plate II.

[0022] Further, the limiting structure II is arranged at the connection of the upper backing plate II and the lower backing plate II, and is respectively located on the opposite sides perpendicular to the radial section of the pyrolysis gas collection pipe at the connection of the upper backing plate II and the lower backing plate II;

[0023] One end of the limiting structure II is fixedly connected to the upper backing plate II, and the other end is located outside the lower backing plate II. The limiting structure II is in clearance fit with the lower backing plate II;

[0024] The gap between the adjacent surfaces of the limiting structure II and the lower backing plate II is ≤ 0.2 mm.

[0025] Further, the limiting structure III includes an oblong hole provided on the upper backing plate II and a round hole provided on the lower backing plate II. The oblong hole and the round hole are coaxially arranged. The length extension direction of the oblong hole is parallel to the axis direction of the pyrolysis gas collection pipe, and the oblong hole and the round hole are connected by bolts;

[0026] The distance between the centers of the two ends of the oblong hole is the maximum temperature difference expansion distance set for the pyrolysis gas collection pipe;

[0027] The short diameter of the oblong hole is larger than the diameter of the bolt, and the difference between the short diameter of the oblong hole and the diameter of the bolt is ≤ 0.2 mm;

[0028] The diameter of the round hole is larger than the diameter of the bolt, and the difference between the diameter of the round hole and the diameter of the bolt is ≤ 0.2 mm.

[0029] Further, the support structure is arranged along the extension direction of the pyrolysis gas collection pipe, and the number of the fixed support structure groups is 1; at least 1 sliding support structure group is respectively arranged on both sides of the fixed support structure group;

[0030] The number of the sliding support structure groups is 2 - 8, preferably 4;

[0031] The fixed support structure group includes at least 3 fixed support structures, preferably 4;

[0032] The sliding support structure group includes at least 3 sliding support structures, preferably 4;

[0033] The leg I is connected to the pyrolysis gas collection pipe, and the support leg I is connected to the rotary kiln.

[0034] A support structure for a pyrolysis gas collection pipe of a rotary kiln provided by the present utility model. The limiting structure I fixes the relative positions of the leg I and the support leg I, so that the relative positions of the pyrolysis gas collection pipe in the axial, circumferential and radial directions of the rotary kiln do not change; the limiting structure II fixes the leg II and the support leg II so that the relative positions of the pyrolysis gas collection pipe in the radial and circumferential directions of the rotary kiln do not change, but allows the pyrolysis gas collection pipe to have a relative displacement in the axial direction of the rotary kiln; the limiting structure III limits the relative moving distance of the leg II and the support leg II along the axial direction of the pyrolysis gas collection pipe, and allows the relative position in the axial direction of the rotary kiln to change within the moving range limited by the limiting structure III, reducing the probability of thermal deformation and tearing of the pyrolysis gas collection pipe. At the same time, several fixed support structures and several sliding support structures in each group are evenly distributed circumferentially, so that the pyrolysis gas collection pipe reduces the impact and deformation between the leg I and the support leg I or between the leg II and the support leg II, and extends the service life of the pyrolysis gas collection pipe and the overall support structure. It solves the technical problems existing in the prior art that the pyrolysis gas collection pipe and its connection support structure often cause the pyrolysis gas collection pipe to be torn and deformed, deviate from the center of the rotary kiln, or the support structure to be torn and distorted due to unreasonable or no thermal expansion and contraction compensation structure, damaging the normal operation of the pyrolysis rotary kiln and affecting the service life of the rotary kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 Schematic cross-sectional structure diagram of the fixed support structure along the radial direction of the pyrolysis gas collection pipe provided in Embodiment 1 of the present utility model;

[0037] Figure 2 Schematic cross-sectional structure diagram of the fixed support structure along the axial direction of the pyrolysis gas collection pipe provided in Embodiment 1 of the present utility model;

[0038] Figure 3Schematic cross-sectional structure diagram of the sliding support structure provided in Embodiment 1 of the present utility model along the radial direction of the pyrolysis gas collection pipe;

[0039] Figure 4 Schematic cross-sectional structure diagram of the sliding support structure provided in Embodiment 1 of the present utility model along the axial direction of the pyrolysis gas collection pipe;

[0040] Figure 5 Schematic structure diagram of the upper backing plate II provided in Embodiment 1 of the present utility model;

[0041] Figure 6 Schematic structure diagram of the lower backing plate II provided in Embodiment 1 of the present utility model;

[0042] Figure 7 Schematic structure diagram of the usage state of the support structure of the rotary kiln pyrolysis gas collection pipe provided in Embodiment 2 of the present utility model.

[0043] Icon: 1 - Rotary kiln shell; 10 - Pyrolysis gas collection pipe;

[0044] 20 - Fixed support structure; 21 - Leg I; 22 - Support leg I; 23 - Limiting structure I; 24 - Bolt; 211 - Upper bracket I; 212 - Upper backing plate I; 213 - Upper screw hole I; 221 - Lower bracket I; 222 - Lower backing plate I; 223 - Lower screw hole I; 231 - First limiting member I; 232 - Second limiting member I;

[0045] 30 - Sliding support structure; 31 - Leg II; 32 - Support leg II; 33 - Limiting structure II; 311 - Upper bracket II; 312 - Upper backing plate II; 313 - Oval hole; 321 - Lower bracket II; 322 - Lower backing plate II; 323 - Round hole. Detailed implementation manners

[0046] Unless otherwise defined herein, scientific and technical terms used in conjunction with the present utility model shall have the meanings commonly understood by those of ordinary skill in the art. The meanings and scopes of the terms should be clear. However, in any case of potential ambiguity, the definitions provided herein shall prevail over any dictionary or extrinsic definition. In this application, unless otherwise stated, the use of "or" means "and / or". In addition, the use of the term "comprising" and other forms is non-restrictive.

[0047] Unless otherwise stated, the methods and techniques of the present utility model are generally carried out according to conventional methods well known in the art and as described in various general and more specific references, which are cited and discussed throughout this specification.

[0048] The present utility model provides a support structure for a rotary kiln pyrolysis gas collection pipe, including a fixed support structure group and a sliding support structure group;

[0049] The fixed support structure group includes a plurality of fixed support structures 20 evenly distributed circumferentially along the pyrolysis gas collection pipe 10. The plurality of fixed support structures 20 are located on a plane radially parallel to the pyrolysis gas collection pipe 10. The fixed support structure 20 includes a leg I 21, a support leg I 22, and a limit structure I 23 for fixing the relative positions of the leg I 21 and the support leg I 22. One end of the leg I 21 is connected to the pyrolysis gas collection pipe 10, and the other end is connected to the support leg I 22. The end of the support leg I 22 far from the leg I 21 is connected to the rotary kiln;

[0050] The sliding support structure group includes a plurality of sliding support structures 30 evenly distributed circumferentially along the pyrolysis gas collection pipe 10. The plurality of sliding support structures 30 are located on a plane radially parallel to the pyrolysis gas collection pipe 10. The sliding support structure 30 includes a leg II 31, a support leg II 32 connected to the leg II 31, and a limit structure II 33 for fixing the relative positions of the leg II 31 and the support leg II 32 along the circumferential direction of the pyrolysis gas collection pipe 10. One end of the leg II 31 is connected to the pyrolysis gas collection pipe 10, and the other end is connected to the support leg II 32. The end of the support leg II 32 far from the leg II 31 is connected to the rotary kiln;

[0051] A limit structure III is provided at the connection between the leg II 31 and the support leg II 32 for limiting the relative moving distance of the leg II 31 and the support leg II 32 along the axial direction of the pyrolysis gas collection pipe 10.

[0052] The leg I21 is connected to the support leg I22, and the limiting structure I23 fixes the relative positions of the leg I21 and the support leg I22, so that the relative positions of the pyrolysis gas collection pipe 10 in the axial direction, circumferential direction, and radial direction of the rotary kiln do not change; the leg II31 is connected to the support leg II32, and the limiting structure II33 fixes the relative positions of the leg II31 and the support leg II32 in the radial and circumferential directions of the pyrolysis gas collection pipe 10, so that the relative positions of the pyrolysis gas collection pipe 10 in the radial and circumferential directions of the rotary kiln do not change, but allows the pyrolysis gas collection pipe 10 to have relative displacement in the axial direction of the rotary kiln; the limiting structure III limits the relative moving distance of the leg II31 and the support leg II32 in the axial direction of the pyrolysis gas collection pipe 10, and allows the relative position in the axial direction of the rotary kiln to change within the moving range limited by the limiting structure III, reducing the probability of thermal deformation and tearing of the pyrolysis gas collection pipe 10. At the same time, several fixed support structures 20 and several sliding support structures 30 in each group are evenly distributed circumferentially. Several fixed support structures 20 or several sliding support structures 30 in a group together play a role in radial limiting, so that the pyrolysis gas collection pipe 10 reduces the impact and deformation between the leg I21 and the support leg I22 or between the leg II31 and the support leg II32, and extends the service life of the pyrolysis gas collection pipe 10 and the overall support structure. It solves the technical problems existing in the prior art that the pyrolysis gas collection pipe 10 and its connection support structure often cause the pyrolysis gas collection pipe 10 to be torn and deformed, deviate from the center of the rotary kiln, or the support structure to be torn and distorted due to unreasonable or no thermal expansion and contraction compensation structure, destroying the normal operation of the pyrolysis rotary kiln and affecting the service life of the rotary kiln.

[0053] In some specific embodiments, a first gap is provided between the leg I21 and the support leg I22 for providing space for the thermal expansion of the pyrolysis gas collection pipe 10, the leg I21, and the support leg I22.

[0054] In some specific embodiments, the leg I21 includes an upper bracket I211 and an upper backing plate I212, the support leg I22 includes a lower bracket I221 and a lower backing plate I222, and the upper backing plate I212 and the lower backing plate I222 are connected by bolts 24;

[0055] The first gap is located between the upper backing plate I212 and the lower backing plate I222.

[0056] Among them, the size of the first gap is determined according to the size of the structure and the temperature set inside the kiln, so as to ensure that the thermal expansion amounts of the pyrolysis gas collection pipe 10, the upper bracket I211, and the lower bracket I221 are not restricted. The planar distance between the lower backing plate I222 and the upper backing plate I212 should be such that the distance can expand and contract due to thermal expansion and contraction.

[0057] In some specific embodiments, the limiting structure I23 includes a first limiting member I231 and a second limiting member I232 disposed at the connection of the upper support I211 and the upper backing plate I212. The first limiting member I231 is respectively located on the opposite sides of the connection of the upper support I211 and the upper backing plate I212 that are perpendicular to the radial cross-section of the pyrolysis gas collection pipe 10, and the second limiting member I232 is respectively located on the opposite sides of the connection of the upper support I211 and the upper backing plate I212 that are parallel to the radial cross-section of the pyrolysis gas collection pipe 10;

[0058] One end of each of the first limiting member I231 and the second limiting member I232 is fixedly connected to the upper backing plate I212, and the other end of each is located outside the lower backing plate I222. The first limiting member I231 and the second limiting member I232 are respectively in clearance fit with the lower backing plate I222.

[0059] Among them, the clearance fit is to enable the distance between the lower backing plate I and the upper backing plate I to expand and contract due to thermal expansion and contraction, and there is no need for too large a clearance.

[0060] Specifically, the clearance between the adjacent surfaces of the first limiting member I231 and the lower backing plate I222 is ≤ 0.2 mm;

[0061] Specifically, the clearance between the adjacent surfaces of the second limiting member I232 and the lower backing plate I222 is ≤ 0.2 mm.

[0062] Among them, a heat-resistant and wear-resistant alloy can also be surfacing welded on the mating surface of the limiting structure I23 and the lower backing plate I222.

[0063] In some specific embodiments, the upper backing plate I212 is provided with an upper screw hole I213, and the lower backing plate I222 is provided with a lower screw hole I223 opposite to the upper screw hole I213. The upper screw hole I213 and the lower screw hole I223 are connected by a bolt 24;

[0064] The diameters of the upper screw hole I213 and the lower screw hole I223 are both larger than the diameter of the bolt 24, and the differences between the diameters of the upper screw hole I213 and the lower screw hole I223 and the diameter of the bolt 24 are both ≤ 0.2 mm.

[0065] The clearance fit of ≤ 0.2 mm in the fixed support structure 20 can, on the one hand, ensure that the normal release of the radial thermal expansion and contraction of the support leg I21 and the support leg I22, and on the other hand, ensure that the gap between the limiting structure I23 and the lower backing plate I222 is very small during the rotation of the pyrolysis gas collection pipe 10 with the rotary kiln, and there is almost no impact phenomenon caused during the rotation of the pyrolysis gas collection pipe 10, and the components in the kiln operate smoothly; the cooperation between the bolt 24 and the screw hole is mainly to facilitate the positioning and installation of the pyrolysis gas collection pipe 10 and to avoid the phenomenon of jamming due to thermal expansion and contraction.

[0066] In some specific embodiments, a second gap is provided between the leg II 31 and the support leg II 32 to provide space for the thermal expansion of the pyrolysis gas collection pipe 10, the leg II 31, and the support leg II 32.

[0067] In some specific embodiments, the leg II 31 includes an upper bracket II 311 and an upper backing plate II 312, the support leg II 32 includes a lower bracket II 321 and a lower backing plate II 322, and the upper backing plate II 312 and the lower backing plate II 322 are connected by bolts 24;

[0068] The second gap is located between the upper backing plate II 312 and the lower backing plate II 322.

[0069] Wherein, the size of the second gap is determined according to the size of the structure and the set temperature inside the kiln, so as to ensure that the thermal expansion amounts of the pyrolysis gas collection pipe 10, the upper bracket II 311, and the lower bracket II 321 are not restricted. The planar distance between the lower backing plate II 322 and the upper backing plate II 312 should be such that the distance can expand and contract due to thermal expansion and contraction.

[0070] In some specific embodiments, the limiting structure II 33 is arranged at the connection of the upper backing plate II 312 and the lower backing plate II 322, and is respectively located on the opposite sides perpendicular to the radial cross-section of the pyrolysis gas collection pipe 10 at the connection of the upper backing plate II 312 and the lower backing plate II 322;

[0071] One end of the limiting structure II 33 is fixedly connected to the upper backing plate II 312, and the other end is located outside the lower backing plate II 322. The limiting structure II 33 is in clearance fit with the lower backing plate II 322;

[0072] The gap between the adjacent surfaces of the limiting structure II 33 and the lower backing plate II 322 is ≤ 0.2 mm.

[0073] The gap ≤ 0.2 mm in the slip support structure 30 ensures, on the one hand, that the normal release of the radial thermal expansion and contraction of the leg II 31 and the support leg II 32 can be achieved, and on the other hand, that since the gap between the limiting structure II 33 and the lower backing plate II 322 is very small during the rotation of the pyrolysis gas collection pipe 10 with the rotary kiln, there is almost no impact phenomenon during the rotation of the pyrolysis gas collection pipe 10, and the components inside the kiln operate smoothly.

[0074] In some specific embodiments, the limiting structure III includes an oblong hole 313 provided on the upper backing plate II 312 and a round hole 323 provided on the lower backing plate II 322. The oblong hole 313 and the round hole 323 are coaxially arranged. The length extension direction of the oblong hole 313 is parallel to the axial direction of the pyrolysis gas collection pipe 10. The oblong hole 313 and the round hole 323 are connected by a bolt 24.

[0075] The bolt 24 can move along the long diameter direction of the oblong hole 313. The difference between the long diameter of the oblong hole 313 and the diameter of the bolt 24 is the relative moving distance of the leg II 31 and the support leg II 32 along the axial direction of the pyrolysis gas collection pipe 10. It is allowed to move along the axis direction of the rotary kiln within this moving distance range, avoiding thermal deformation or tearing of the pyrolysis gas collection pipe 10 due to pulling during the rotation of the rotary kiln by the absolutely fixed support structure.

[0076] The distance between the centers of the two ends of the oblong hole 313 is the maximum temperature difference expansion distance set for the pyrolysis gas collection pipe 10;

[0077] The short diameter of the oblong hole 313 is larger than the diameter of the bolt 24, and the difference between the short diameter size of the oblong hole 313 and the diameter size of the bolt 24 is ≤ 0.2 mm;

[0078] The diameter of the round hole 323 is larger than the diameter of the bolt 24, and the difference between the diameter size of the round hole 323 and the diameter size of the bolt 24 is ≤ 0.2 mm.

[0079] In addition to the connection function, the bolts in the support structure can also cooperate with adjacent structures to adjust the size of the first gap or the second gap, and have a good effect on adjusting the center position during the installation of the pyrolysis gas collection pipe 10.

[0080] In some specific embodiments, the support structure is arranged along the extension direction of the pyrolysis gas collection pipe 10, and the number of the fixed support structure groups is 1; at least 1 sliding support structure group is respectively arranged on both sides of the fixed support structure group; the number of the sliding support structure groups is 2 - 8, preferably 4;

[0081] The fixed support structure group includes at least 3 fixed support structures 20, preferably 4;

[0082] The sliding support structure group includes at least 3 sliding support structures 30, preferably 4;

[0083] The leg I 21 is connected to the pyrolysis gas collection pipe 10, and the support leg I 22 is connected to the rotary kiln.

[0084] Among them, the number of the sliding support structures 30 in the sliding support structure group is the same as that of the fixed support structures 20 in the fixed support structure group. One fixed support structure group is provided to ensure that the pyrolysis gas collection pipe 10 will not be damaged due to excessive fixed constraints that prevent the release of thermal expansion and contraction, resulting in damage to the pyrolysis gas collection pipe 10 or the fixed support structure 20. The number of the sliding support structure groups is at least two to provide more reliable support for the pyrolysis gas collection pipe 10 in the length direction. Specifically, it can be reasonably selected according to the length of the pyrolysis gas collection pipe 10. For example, it can be selected as four, which are symmetrically arranged up, down, left, and right. This is not only beneficial to the installation of the pyrolysis gas collection pipe 10 in the rotary kiln equipment, but also conducive to the balanced distribution of forces. At least three fixed support structures 20 in the fixed support structure group are provided to ensure good balanced support for the pyrolysis gas collection pipe 10 in the rotary kiln;

[0085] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0086] Embodiment

[0087] Combined with Figures 1 to 6 For illustration, a support structure for a pyrolysis gas collection pipe of a rotary kiln, the support structure includes a fixed support structure 20 and a sliding support structure 30.

[0088] As Figures 1 to 2 shown, the fixed support structure 20 includes a leg I21 provided on the pyrolysis gas collection pipe 10, and the leg I21 is fixedly connected to the pyrolysis gas collection pipe 10; it also includes a support leg I22 correspondingly provided on the rotary kiln shell 1 and fixedly connected to the rotary kiln shell 1; it further includes a limiting structure I23 provided on the leg I21 or the support leg I22 for limiting the movement of the support leg I22 or the leg I21 in the axial direction of the rotary kiln. The fixed support structure 20 enables the pyrolysis gas collection pipe 10 not to change at the position of the leg I21 due to temperature changes in the kiln.

[0089] The outrigger I21 includes an upper bracket I211 and an upper backing plate I212. One end of the upper bracket I211 is fixedly connected to the pyrolysis gas collection pipe 10, and the other end is fixedly connected to the upper backing plate I212. The support leg I22 includes a lower bracket I221 and a lower backing plate I222. One end of the lower bracket I221 is fixedly connected to the rotary kiln shell 1, and the other end is fixedly connected to the lower backing plate I222. The upper backing plate I212 and the lower backing plate I222 are arranged opposite to each other. The upper backing plate I212 is provided with 4 upper screw holes I213, and the lower backing plate I222 is provided with 4 lower screw holes I223 that are equal in number and the same in diameter as the upper screw holes I213. The corresponding upper screw holes I213 and lower screw holes I223 are connected by bolts 24. The diameter of the bolt 24 and the diameter gap between the upper screw holes I213 and the lower screw holes I223 ≤ 0.2 mm. A first gap with a distance L is provided between the opposite surfaces of the upper backing plate I212 and the lower backing plate I222. During application, the size of the distance L can be adjusted by the bolt 24 according to the size of the structure and the temperature set inside the kiln. The limiting structure I23 is composed of a first limiting member I231 arranged on the front and rear sides of the upper bracket I211 and parallel to the center line of the pyrolysis gas collection pipe 10 and a second limiting member I232 arranged on the left and right sides of the upper bracket I211 and perpendicular to the center line of the pyrolysis gas collection pipe 10, and they are respectively fixedly connected to the upper bracket I211 and the upper backing plate I212. The limiting surfaces of the first limiting member I231 and the second limiting member I232 correspond to the front and rear side surfaces and the left and right side surfaces of the lower backing plate I222 respectively, and there is a gap, and their fit is a clearance fit, and the single-sided clearance ≤ 0.2 mm. This clearance fit is only for the distance between the lower backing plate I and the upper backing plate I to be able to expand and contract due to thermal expansion and contraction, and there is no need for too large a gap. The limiting surfaces of the first limiting member I231 and the second limiting member I232 and the front and rear side surfaces and the left and right side surfaces of the lower backing plate I222 are all surfacing welded with high-temperature and wear-resistant alloys, specifically surfacing welded with 414N alloy welding wires.

[0090] As Figures 3 to 6 shown, the sliding support structure 30 includes an outrigger II31 fixedly connected to the pyrolysis gas collection pipe 10 and a support leg II32 correspondingly fixedly connected to the rotary kiln shell 1; it also includes a limiting structure II33 arranged on the outrigger II31 or the support leg II32 to limit the relative fixation of the support leg II32 or the outrigger II31 in the circumferential position during rotation.

[0091] The outrigger II 31 includes an upper bracket II 311 and an upper backing plate II 312. The upper backing plate II 312 is away from the pyrolysis gas collection pipe 10. The upper bracket II 311 is arranged between the upper backing plate II 312 and the pyrolysis gas collection pipe 10. One end of the upper bracket II 311 is fixedly connected to the pyrolysis gas collection pipe 10, and the other end is fixedly connected to the upper backing plate II 312. The supporting leg II 32 includes a lower bracket II 321 and a lower backing plate II 322. One end of the lower bracket II 321 is fixedly connected to the rotary kiln shell 1, and the other end is fixedly connected to the lower backing plate II 322. The upper backing plate II 312 and the lower backing plate II 322 are arranged oppositely. In this embodiment, 4 round holes 323 are arranged on the lower backing plate II 322, and 4 oblong holes 313 are arranged on the upper backing plate II 312 corresponding to the round holes 323. The distance between the centers of the oblong holes 313 is L1, which is the maximum temperature difference expansion distance set for the pyrolysis gas collection pipe. The short diameter gap between the bolt 24 and the oblong hole 313 is ≤ 0.2 mm. A distance L is provided as the second gap between the opposite surfaces of the upper backing plate II 312 and the lower backing plate II 322. During application, the size of the distance L can be adjusted by the bolt 24 according to the size of the structure and the temperature set inside the kiln. At the same time, the pyrolysis gas collection pipe is adjusted to the center of the rotary kiln. A limiting structure II 33 is arranged on the outrigger II 31 or the supporting leg II 32. The limiting structure II 33 consists of 2 groups of front and rear limiters. The limiters are arranged on the front and rear sides of the upper bracket II 311 or the lower bracket II 321 parallel to the axis of the pyrolysis gas collection pipe 10, and one end of the bolt 24 is connected to the upper backing plate II 312 or the lower backing plate II 322. The inner side of the other end of the limiter is inserted into the front and rear sides of the lower backing plate II 322 or the upper backing plate II 312 parallel to the axis of the pyrolysis gas collection pipe 10. Their fit is a clearance fit, and the single-sided clearance is ≤ 0.2 mm. This clearance fit is only for the distance between the lower backing plate II and the upper backing plate II to expand and contract due to thermal expansion and contraction, and there is no need for too large a clearance. At the same time, when the pyrolysis gas collection pipe 10 rotates together with the rotary kiln shell 1, it is prevented that the clearance becomes larger and larger due to the impact caused by too large a clearance. For anti-impact, a 414N high-temperature and wear-resistant alloy welding wire is surfacing welded on the mating surface.

[0092] Application example

[0093] Combined with Figure 7Description is made as follows. A support structure for a pyrolysis gas collection pipe provided in Application Example 1 is applied. The pyrolysis gas collection pipe 10 is located inside the rotary kiln shell 1 and is arranged along the length direction of the axis of the rotary kiln shell 1. The support structure includes a set of fixed support structures 20 and 4 sets of sliding support structures 30. At least one set of sliding support structures 30 is arranged on each side of the fixed support structure 20. The sliding support structure 30 allows the relative position of the pyrolysis gas collection pipe 10 at the support point to change along the axis direction of the rotary kiln. Whether it is the fixed support structure 20 or the sliding support structure 30, the "set" means 3 to 6 fixed support structures 20 or sliding support structures 30 with the same quantity spaced apart on the same plane on the outer periphery of the pyrolysis gas collection pipe 10. In this embodiment, 4 fixed support structures 20 symmetrically arranged up and down, left and right are taken as a set and 4 sliding support structures 30 are taken as a set.

[0094] The fixed support structure 20 is arranged closer to the discharge end of the rotary kiln, which helps the pyrolysis gas collection pipe not to have an adverse impact on the discharge end under the condition of thermal expansion and contraction. It is better to leave a relatively larger free expansion and contraction in the middle position of the rotary kiln, and it has no impact on other settings.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A supporting structure for a rotary kiln pyrolysis gas collecting pipe, characterized in that: It includes a fixed support structure group and a sliding support structure group; The fixed support structure group comprises a plurality of fixed support structures (20) uniformly distributed along the circumference of the pyrolysis gas collecting pipe (10), the plurality of fixed support structures (20) being located on a plane radially parallel to the pyrolysis gas collecting pipe (10), the fixed support structure (20) comprising a support leg I (21), a support leg I (22) and a limiting structure I (23) for fixing the relative position of the support leg I (21) and the support leg I (22), one end of the support leg I (21) being connected to the pyrolysis gas collecting pipe (10), and the other end being connected to the support leg I (22), and the end of the support leg I (22) away from the support leg I (21) being connected to the rotary kiln; The sliding support structure group comprises a plurality of sliding support structures (30) uniformly distributed along the circumference of the pyrolysis gas collection pipe (10), the plurality of sliding support structures (30) being located on a plane radially parallel to the pyrolysis gas collection pipe (10), the sliding support structure (30) comprising a support leg II (31), a support leg II (32) connected to the support leg II (31), and a limiting structure II (33) for fixing the relative position of the support leg II (31) and the support leg II (32) along the circumference of the pyrolysis gas collection pipe (10), one end of the support leg II (31) being connected to the pyrolysis gas collection pipe (10), and the other end being connected to the support leg II (32), and the end of the support leg II (32) away from the support leg II (31) being connected to the rotary kiln; A limiting structure III is provided at the connection between the support leg II (31) and the support leg II (32), which is used to limit the relative movement distance between the support leg II (31) and the support leg II (32) along the axial direction of the pyrolysis gas collecting pipe (10).

2. The support structure according to claim 1, characterized in that: A first gap is provided between the support leg I (21) and the support leg I (22) to provide space for thermal expansion of the pyrolysis gas collecting pipe (10), the support leg I (21) and the support leg I (22).

3. The support structure according to claim 2, characterized in that: The support leg 1 (21) includes an upper bracket 1 (211) and an upper pad 1 (212), and the support leg 1 (22) includes a lower bracket 1 (221) and a lower pad 1 (222), and the upper pad 1 (212) and the lower pad 1 (222) are connected by bolts (24); The first gap is located between the upper pad I (212) and the lower pad I (222).

4. The support structure according to claim 3, characterized in that: The limiting structure I (23) comprises a first limiting member I (231) and a second limiting member I (232) which are arranged at the connection between the upper bracket I (211) and the upper pad I (212), wherein the first limiting member I (231) is respectively located on the opposite side surfaces perpendicular to the radial cross section of the pyrolysis gas collecting pipe (10) at the connection between the upper bracket I (211) and the upper pad I (212), and the second limiting member I (232) is respectively located on the opposite side surfaces parallel to the radial cross section of the pyrolysis gas collecting pipe (10) at the connection between the upper bracket I (211) and the upper pad I (212); One end of the first limiting member 1 (231) and the second limiting member 1 (232) are fixedly connected to the upper pad 1 (212), and the other end is located outside the lower pad 1 (222), and the first limiting member 1 (231) and the second limiting member 1 (232) are respectively clearance-matched with the lower pad 1 (222); The gap between adjacent surfaces of the first stopper I (231) and the lower pad I (222) is ≤ 0.2 mm; The gap between adjacent surfaces of the second limiting member I (232) and the lower pad I (222) is ≤0.2 mm.

5. The support structure according to claim 4, characterized in that: The upper pad plate 1 (212) is provided with an upper screw hole 1 (213), and the lower pad plate 1 (222) is provided with a lower screw hole 1 (223) opposite to the upper screw hole 1 (213), and the upper screw hole 1 (213) and the lower screw hole 1 (223) are connected by a bolt (24); The diameters of the upper screw hole I (213) and the lower screw hole I (223) are both larger than the diameter of the bolt (24), and the difference between the diameters of the upper screw hole I (213) and the lower screw hole I (223) and the diameter of the bolt (24) is ≤0.2 mm.

6. The support structure according to claim 1, characterized in that: A second gap is provided between the support leg II (31) and the support leg II (32) to provide space for thermal expansion of the pyrolysis gas collecting pipe (10), the support leg II (31) and the support leg II (32).

7. The support structure according to claim 6, characterized in that The support leg II (31) includes an upper bracket II (311) and an upper pad II (312), and the support leg II (32) includes a lower bracket II (321) and a lower pad II (322), and the upper pad II (312) and the lower pad II (322) are connected by bolts (24); The second gap is located between the upper pad II (312) and the lower pad II (322).

8. The support structure according to claim 7, characterized in that: The limiting structure II (33) is arranged at the connection between the upper pad II (312) and the lower pad II (322), and is respectively located on the opposite side surfaces of the connection between the upper pad II (312) and the lower pad II (322) and perpendicular to the radial cross section of the pyrolysis gas collecting pipe (10); One end of the limiting structure II (33) is fixedly connected to the upper pad II (312), and the other end is located outside the lower pad II (322), and the limiting structure II (33) and the lower pad II (322) are clearance-matched; The gap between adjacent surfaces of the limiting structure II (33) and the lower pad II (322) is ≤0.2 mm.

9. The support structure according to claim 8, characterized in that The limiting structure III comprises an oblong hole (313) arranged on the upper pad II (312) and a round hole (323) arranged on the lower pad II (322); the oblong hole (313) and the round hole (323) are arranged coaxially; the length extension direction of the oblong hole (313) is parallel to the axial direction of the pyrolysis gas collection pipe (10); and the oblong hole (313) and the round hole (323) are connected by bolts (24); The distance between the centers of the two ends of the oblong hole (313) is the maximum temperature difference expansion distance set by the pyrolysis gas collecting pipe (10); The short diameter of the oblong hole (313) is greater than the diameter of the bolt (24), and the difference between the short diameter of the oblong hole (313) and the diameter of the bolt (24) is ≤0.2 mm; The diameter of the circular hole (323) is greater than the diameter of the bolt (24), and the difference between the diameter of the circular hole (323) and the diameter of the bolt (24) is ≤0.2 mm.

10. The support structure according to any one of claims 1 to 9, characterized in that: The support structure is arranged along the extension direction of the pyrolysis gas collecting pipe (10), and the number of the fixed support structure group is one; at least one sliding support structure group is arranged on both sides of the fixed support structure group; The number of the sliding support structure groups is 2 to 8; The fixed support structure group comprises at least three fixed support structures (20); The sliding support structure group comprises at least three sliding support structures (30); The support leg I (21) is connected to the pyrolysis gas collecting pipe (10), and the support leg I (22) is connected to the rotary kiln.

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