Arrangement structure of radiant tube of rotary pyrolysis kiln

Abstract

The invention discloses a radiant tube arrangement structure of a rotary pyrolysis kiln. The radiant tube arrangement structure is located in the rotary pyrolysis kiln. The arrangement structures are arranged at the kiln head and the kiln tail of the rotary pyrolysis kiln respectively, and radiant tubes in corresponding areas are installed through the arrangement structures. The rotary pyrolysis kiln is evenly divided into a plurality of radiant tube installation areas in the circumferential direction of the rotary pyrolysis kiln, and the distances between the radiant tubes of the adjacent radiant tube installation areas are gradually increased from the ends close to the center of the rotary pyrolysis kiln to the ends close to the inner wall of the rotary pyrolysis kiln. And the multiple groups of radiant tubes in each radiant tube mounting area are positioned with the rotary pyrolysis kiln through the arrangement structure. According to the arrangement structure, the radiant tubes in the corresponding areas are arranged in a split type installation structure mode, the radiant tubes in the rotary pyrolysis kiln are divided into a plurality of areas according to the fan-shaped areas, and the maximum distance between the radiant tubes in each fan-shaped area is kept to meet the requirement of maintenance operation of operators.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis technology, and in particular to a novel rotary pyrolysis kiln suitable for pulverized coal pyrolysis to produce clean coal, low-temperature coal tar, pyrolysis gas, and by-product steam. Specifically, it relates to a novel arrangement and structure of the radiant tubes of the rotary pyrolysis kiln. Background Technology

[0002] like Figure 1 As shown, the existing rotary pyrolysis kiln production process mainly involves feeding coal into the rotary pyrolysis kiln through a silo and a screw feeder. Inside the rotary pyrolysis kiln, the coal contacts the pyrolysis radiant tubes for heat exchange, heating the coal to 500℃-550℃. The coal decomposes under heat in the rotary pyrolysis kiln, producing coal gas, tar gas, and clean coal. Finally, the clean coal is discharged through the discharge device at the kiln tail into a waste heat boiler for cooling and then discharged into a silo via a conveyor belt for sale.

[0003] like Figure 2 As shown, in existing technologies, pyrolysis radiant tubes are generally arranged with equal spacing between each layer of radiant tubes. Typically, the minimum spacing between four layers of radiant tubes with different diameters is only 127mm, and the maximum spacing is only 271mm. If the insulation castable falls off, the relevant radiant tubes need to be removed for repair. However, due to the arrangement of pyrolysis radiant tubes in existing technologies, the repair work is extremely complicated and takes at least three months and sometimes up to six months, making it impossible for the equipment to maintain long-term operation.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a rotary pyrolysis kiln radiant tube arrangement structure. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary pyrolysis kiln radiant tube arrangement structure. This arrangement structure arranges the radiant tubes in corresponding areas in a split installation manner, and divides the radiant tubes in the rotary pyrolysis kiln into multiple areas according to fan-shaped regions, while maintaining the maximum spacing between the radiant tubes in each fan-shaped region to meet the requirements of the operator's maintenance work.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention provides a radiant tube arrangement structure for a rotary pyrolysis kiln, wherein the radiant tube arrangement structure is located inside the rotary pyrolysis kiln.

[0008] The arrangement structure is respectively set at the kiln head and kiln tail of the rotary pyrolysis kiln, and the radiant tubes of the corresponding areas are installed through the arrangement structure;

[0009] The rotary pyrolysis kiln is evenly divided into multiple radiant tube installation areas along its circumference, and the distance between the radiant tubes in adjacent radiant tube installation areas gradually increases from the end near the center of the rotary pyrolysis kiln to the end near the inner wall of the rotary pyrolysis kiln.

[0010] Multiple sets of radiant tubes within each radiant tube installation area are positioned with the rotary pyrolysis kiln via the aforementioned arrangement structure.

[0011] Furthermore, the arrangement structure includes radiant tube mounting frames respectively assembled and fixed to the kiln head and kiln tail of the rotary pyrolysis kiln;

[0012] The radiant tube mounting bracket is configured as a fan-shaped mounting plate with a gradually decreasing width from the side near the inner wall of the rotary pyrolysis furnace to the side near the center of the rotary pyrolysis furnace.

[0013] The inner walls of the kiln head and kiln tail of the rotary pyrolysis kiln are welded and fixed with a ring, and the fan-shaped mounting plate is assembled and fixed with the mounting ring to position the radiant tubes in the corresponding areas.

[0014] Furthermore, each of the radiant tube installation areas has four sets of radiant tubes distributed along the rotary pyrolysis kiln, and each set of radiant tubes includes two radiant tubes arranged at intervals.

[0015] The distance between the two radiating tubes in each group is 127 mm;

[0016] The four groups of radiant tubes in each radiant tube installation area are, from near the center of the rotary pyrolysis kiln to near the inner wall of the rotary pyrolysis kiln, respectively, the first group of radiant tubes, the second group of radiant tubes, the third group of radiant tubes, and the fourth group of radiant tubes.

[0017] The spacing between the first group of radiant tubes in the adjacent radiant tube installation areas that are close to each other is 286 mm.

[0018] The distance between the fourth group of radiant tubes in the adjacent radiant tube installation area is 747 mm.

[0019] Furthermore, the two ends of the four sets of radiant tubes in each radiant tube installation area are supported by two fan-shaped mounting plates located at the kiln head and kiln tail, respectively.

[0020] A guide rod connects the two sector-shaped mounting plates in each of the radiant tube mounting areas, and the sector-shaped mounting plates can move along the axial direction of the guide rod. At the same time, the two sector-shaped mounting plates are connected as one unit by the guide rod.

[0021] Furthermore, the mounting ring is provided with a plurality of first mounting holes evenly distributed along its circumference, and a guide groove is machined at the end of the mounting ring near the center of the rotary pyrolysis kiln, and the guide groove matches the outer diameter of the guide connecting rod.

[0022] The sector-shaped mounting plate includes:

[0023] The mounting part that is assembled and fixed with the mounting ring; and

[0024] A tube body integrally formed with the mounting part and extending radially toward the center of the rotary pyrolysis kiln;

[0025] The mounting part is machined with two second mounting holes, which mate with any of the first mounting holes and are assembled and fixed to the mounting ring by bolts;

[0026] A guide rod through hole is machined in the area between the mounting part and the pipe body, and the guide rod passes through the guide rod through hole.

[0027] Furthermore, when the sector-shaped mounting plate is assembled with the corresponding mounting ring, the sector-shaped mounting plate is arranged on one side of the outer surface of the corresponding mounting ring;

[0028] The guide rod is partially embedded in the guide groove, and the guide rod is connected to the sector mounting plate by fasteners to position and fix the sector mounting plate.

[0029] Furthermore, the two ends of the guide rod are threaded rods, while the remaining parts of the guide rod are smooth rods;

[0030] The opening size of the guide rod through hole of the sector-shaped mounting plate is larger than the maximum outer diameter of the threaded rod, and the sector-shaped mounting plate can be detached from the guide rod;

[0031] A lock nut is installed on the threaded rod.

[0032] Furthermore, the location where the tube body mates with the radiant tube is machined with a radiant tube hole, and a high-temperature resistant bushing is installed inside the radiant tube hole, and the radiant tube is positioned and installed through the high-temperature resistant bushing.

[0033] In the above technical solution, the rotary pyrolysis kiln radiant tube arrangement structure provided by the present invention has the following beneficial effects:

[0034] The arrangement structure of the present invention arranges the radiant tubes in the corresponding areas in a split installation structure, and divides the radiant tubes in the rotary pyrolysis kiln into multiple areas according to the fan-shaped area, and maintains the maximum spacing of the radiant tubes in each fan-shaped area to meet the requirements of the operator's maintenance work. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0036] Figure 1 This is a process flow diagram of a rotary pyrolysis kiln in the existing technology;

[0037] Figure 2 This is a diagram showing the arrangement of radiant tubes inside a rotary pyrolysis kiln in the prior art.

[0038] Figure 3 This is a diagram showing the arrangement of the radiant tubes in the rotary pyrolysis kiln radiant tube arrangement structure disclosed in an embodiment of the present invention.

[0039] Figure 4 This is a schematic diagram of the internal mounting ring of the rotary pyrolysis kiln, which is part of the radiant tube arrangement structure of the rotary pyrolysis kiln disclosed in an embodiment of the present invention.

[0040] Figure 5 This is a schematic diagram of the mating structure between the mounting ring and a fan-shaped mounting plate in the rotary pyrolysis kiln radiant tube arrangement structure disclosed in an embodiment of the present invention.

[0041] Figure 6 This is a schematic diagram of the fan-shaped mounting plate of the rotary pyrolysis kiln radiant tube arrangement structure disclosed in an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the connection structure of a set of fan-shaped mounting plates in the rotary pyrolysis kiln radiant tube arrangement structure disclosed in an embodiment of the present invention.

[0043] Figure 8 This is a schematic diagram of the connection structure of the guide rod of the rotary pyrolysis kiln radiant tube arrangement structure disclosed in an embodiment of the present invention.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Rotary pyrolysis kiln; 2. Radiant tube; 3. Mounting ring; 4. Fan-shaped mounting plate; 5. Guide rod;

[0046] 301, First mounting hole; 302, Guide groove;

[0047] 401. Mounting section; 402. Pipe body; 403. Second mounting hole; 404. Guide rod through hole;

[0048] 501. Threaded rod; 502. Plain rod. Detailed Implementation

[0049] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] See Figures 3 to 8 As shown;

[0051] This embodiment provides a rotary pyrolysis kiln radiant tube arrangement structure, which is located inside the rotary pyrolysis kiln 1. The arrangement structure is respectively set at the kiln head and kiln tail of the rotary pyrolysis kiln 1, and radiant tubes 2 in corresponding areas are installed through the arrangement structure.

[0052] The rotary pyrolysis kiln 1 is evenly divided into multiple radiant tube installation areas along its circumference, and the spacing between the radiant tubes 2 in adjacent radiant tube installation areas gradually increases from the end closest to the center of the rotary pyrolysis kiln 1 to the end closest to the inner wall of the rotary pyrolysis kiln 1; multiple sets of radiant tubes 2 in each radiant tube installation area are positioned with the rotary pyrolysis kiln 1 through an arrangement structure.

[0053] Specifically, this embodiment improves upon the original equidistant arrangement of the radiant tubes 2 by employing a multi-group arrangement structure to divide the radiant tubes 2 within the rotary pyrolysis furnace 1 into multiple radiant tube installation areas. Furthermore, to allow for operational space during maintenance, the spacing between the radiant tubes 2 in this embodiment is different and non-equidistant. Specifically, the spacing of the radiant tubes 2 gradually increases from the end near the center of the rotary pyrolysis furnace 1 to the end near the inner wall of the furnace 1. In other words, the entire radiant tube installation area is configured as a fan-shaped region. This ensures that the spacing between the outermost radiant tubes 2 is maximized, and the designed spacing can accommodate the operator's work. This arrangement and structure not only changes the original arrangement of the radiant tubes 2 but also does not affect the heat radiation process and facilitates later maintenance.

[0054] Preferably, the arrangement structure of this embodiment includes radiant tube mounting frames that are respectively assembled and fixed to the kiln head and kiln tail of the rotary pyrolysis kiln 1; the radiant tube mounting frame is configured as a fan-shaped mounting plate 4 whose width gradually decreases from the side near the inner wall of the rotary pyrolysis kiln 1 to the side near the center of the rotary pyrolysis kiln 1.

[0055] In order to install the fan-shaped mounting plate 4, a mounting ring 3 is welded and fixed to the inner wall of the kiln head and kiln tail of the rotary pyrolysis kiln 1 in this embodiment, and the fan-shaped mounting plate 4 is assembled and fixed to the mounting ring 3 to position the radiant tube 2 in the corresponding area.

[0056] As an improved arrangement of the radiant tubes 2 in this embodiment, four sets of radiant tubes 2 are distributed along the rotary pyrolysis furnace 1 in each radiant tube installation area, and each set of radiant tubes 2 includes two radiant tubes 2 arranged at intervals; the distance between the two radiant tubes 2 in each set of radiant tubes 2 is 127mm; the four sets of radiant tubes 2 in each radiant tube installation area are the first set of radiant tubes, the second set of radiant tubes, the third set of radiant tubes, and the fourth set of radiant tubes, respectively, from the center of the rotary pyrolysis furnace 1 to the inner wall of the rotary pyrolysis furnace 1; as the minimum size spacing, the distance between the closest radiant tubes 2 in the first set of radiant tubes in adjacent radiant tube installation areas is 286mm; as the maximum size spacing, the distance between the closest radiant tubes 2 in the fourth set of radiant tubes in adjacent radiant tube installation areas is 747mm.

[0057] Preferably, in this embodiment, the two ends of the four sets of radiant tubes 2 in each radiant tube installation area are supported by two fan-shaped mounting plates 4 located at the kiln head and the kiln tail, respectively.

[0058] A guide rod 5 connects the two sector-shaped mounting plates 4 in each radiant tube mounting area, and the sector-shaped mounting plates 4 can move along the axial direction of the guide rod 5. At the same time, the two sector-shaped mounting plates 4 are connected as one unit by the guide rod 5.

[0059] In order to achieve assembly and fixation with the fan-shaped mounting plate 4, and to adjust the number and spacing of the radiant tube installation area according to different spacing requirements, the mounting ring 3 in this embodiment is uniformly provided with a plurality of first mounting holes 301 along its circumference, and the end of the mounting ring 3 near the center of the rotary pyrolysis kiln 1 is machined with a guide groove 302, and the guide groove 302 matches the outer diameter of the guide connecting rod 5.

[0060] The fan-shaped mounting plate 4 includes a mounting part 401 that is assembled and fixed with the mounting ring 3; and a tube body 402 that is integrally formed with the mounting part 401 and extends radially toward the center of the rotary pyrolysis furnace 1. In this embodiment, the mounting part 401 is machined with two second mounting holes 403. The second mounting holes 403 cooperate with any of the first mounting holes 301 and the mounting part 401 and the mounting ring 3 are assembled and fixed by bolts. A guide rod through hole 405 is machined in the area between the mounting part 401 and the tube body 402, and the guide rod 5 passes through the guide rod through hole 405.

[0061] In this embodiment, the sector-shaped mounting plate 4 can be assembled using any two of the first mounting holes 301. This allows for adjustment of the spacing between adjacent radiator tube installation areas and the number of radiator tube installation areas according to actual process requirements and maintenance spacing requirements. Furthermore, the bolted assembly of the two first mounting holes 301 and the two second mounting holes 403 simplifies the assembly and disassembly process, facilitating the removal of the radiator tubes 2 within the corresponding radiator tube installation areas.

[0062] Preferably, in this embodiment, when the sector-shaped mounting plate 4 is assembled with the corresponding mounting ring 3, the sector-shaped mounting plate 4 is arranged on one side of the outer surface of the corresponding mounting ring 3. First, arranging the sector-shaped mounting plate 4 on the outer surface of the mounting ring 3 makes it easy for the sector-shaped mounting plate 4 to detach from the mounting ring 3 for disassembly. At the same time, the guide rod 5 not only serves as a connecting component between the two sector-shaped mounting plates 4, but also as a guiding component for the sector-shaped mounting plate 4. Specifically, in this embodiment, the guide rod 5 is partially embedded in the guide groove 302, and the guide rod 5 is connected to the sector-shaped mounting plate 4 by fasteners to position and fix the sector-shaped mounting plate 4.

[0063] In order to enable the sliding and assembly of the sector mounting plate 4, the two ends of the guide rod 5 in this embodiment are threaded rods 501, and the remaining positions of the guide rod 5 are smooth rods 502; the opening size of the guide rod through hole 405 of the sector mounting plate 4 is larger than the maximum outer diameter of the threaded rod 501, and the sector mounting plate 4 can be disengaged from the guide rod 5; a locking nut is installed on the threaded rod 501.

[0064] Preferably, in this embodiment, the tube body 402 and the radiant tube 2 are machined with a radiant tube hole 404, and a high-temperature resistant bushing is installed in the radiant tube hole 404, and the radiant tube 2 is positioned and installed through the high-temperature resistant bushing.

[0065] In the above technical solution, the rotary pyrolysis kiln radiant tube arrangement structure provided by the present invention has the following beneficial effects:

[0066] The arrangement structure of the present invention arranges the radiant tubes 2 in the corresponding areas in a split installation structure, and divides the radiant tubes in the rotary pyrolysis kiln 1 into multiple areas according to the fan-shaped area, and maintains the maximum spacing of the radiant tubes 2 in each fan-shaped area to meet the requirements of the operator's maintenance work.

[0067] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rotary pyrolysis kiln radiant tube arrangement structure, characterized in that, The radiant tube arrangement structure is located inside the rotary pyrolysis kiln (1); The arrangement structure is respectively set at the kiln head and kiln tail of the rotary pyrolysis kiln (1), and the radiant tubes (2) of the corresponding area are installed through the arrangement structure. The rotary pyrolysis kiln (1) is evenly divided into multiple radiant tube installation areas along its circumference, and the distance between the radiant tubes (2) in adjacent radiant tube installation areas gradually increases from one end near the center of the rotary pyrolysis kiln (1) to one end near the inner wall of the rotary pyrolysis kiln (1). Multiple sets of radiant tubes (2) within each radiant tube installation area are positioned with the rotary pyrolysis kiln (1) through the arrangement structure.

2. The arrangement structure of the radiant tubes in a rotary pyrolysis kiln according to claim 1, characterized in that, The arrangement structure includes radiant tube mounting frames that are respectively assembled and fixed to the kiln head and kiln tail of the rotary pyrolysis kiln (1); The radiant tube mounting bracket is configured as a fan-shaped mounting plate (4) whose width gradually decreases from the side near the inner wall of the rotary pyrolysis furnace (1) to the side near the center of the rotary pyrolysis furnace (1). The inner walls of the kiln head and kiln tail of the rotary pyrolysis kiln (1) are welded and fixed with a ring of installation (3), and the fan-shaped installation plate (4) is assembled and fixed with the installation ring (3) to position the radiant tube (2) in the corresponding area.

3. The arrangement structure of the radiant tubes in a rotary pyrolysis kiln according to claim 2, characterized in that, Four sets of radiant tubes (2) are distributed along the rotary pyrolysis kiln (1) in each radiant tube installation area, and each set of radiant tubes (2) includes two radiant tubes (2) arranged at intervals. The spacing between the two radiation tubes (2) in each group is 127 mm; The four groups of radiant tubes (2) in each radiant tube installation area are the first group of radiant tubes, the second group of radiant tubes, the third group of radiant tubes and the fourth group of radiant tubes, respectively, from the center of the rotary pyrolysis kiln (1) to the inner wall of the rotary pyrolysis kiln (1); The distance between the first group of radiant tubes in the adjacent radiant tube installation area and the radiant tubes (2) that are close to each other is 286mm; The distance between the fourth group of radiant tubes in the adjacent radiant tube installation area and the radiant tube (2) that are close to each other is 747mm.

4. The arrangement structure of the radiant tubes in a rotary pyrolysis kiln according to claim 2, characterized in that, The two ends of the four sets of radiant tubes (2) in each radiant tube installation area are supported by two fan-shaped mounting plates (4) located at the kiln head and kiln tail respectively; A guide rod (5) is connected between the two fan-shaped mounting plates (4) in each of the radiant tube mounting areas, and the fan-shaped mounting plates (4) can move along the axial direction of the guide rod (5). At the same time, the two fan-shaped mounting plates (4) are connected as one unit through the guide rod (5).

5. The arrangement structure of the radiant tubes in a rotary pyrolysis kiln according to claim 4, characterized in that, The mounting ring (3) has a plurality of first mounting holes (301) evenly distributed around its circumference, and the end of the mounting ring (3) near the center of the rotary pyrolysis kiln (1) is machined with a guide groove (302), and the guide groove (302) matches the outer diameter of the guide connecting rod (5); The fan-shaped mounting plate (4) includes: The mounting part (401) is assembled and fixed with the mounting ring (3); and A tube body (1) integrally formed with the mounting part (401) and extending radially toward the center of the rotary pyrolysis kiln (1). The mounting part (401) is machined with two second mounting holes (403), and the second mounting holes (403) cooperate with any of the first mounting holes (301) and the mounting part (401) and the mounting ring (3) are assembled and fixed by bolts; A guide rod through hole (405) is machined in the area between the mounting part (401) and the pipe body (402), and the guide rod (5) passes through the guide rod through hole (405).

6. The arrangement structure of the radiant tubes in a rotary pyrolysis kiln according to claim 5, characterized in that, When the sector-shaped mounting plate (4) is assembled with the corresponding mounting ring (3), the sector-shaped mounting plate (4) is arranged on one side of the outer surface of the corresponding mounting ring (3); The guide rod (5) is partially embedded in the guide groove (302), and the guide rod (5) is connected to the fan-shaped mounting plate (4) by fasteners to position and fix the fan-shaped mounting plate (4).

7. The arrangement structure of the radiant tubes in a rotary pyrolysis kiln according to claim 6, characterized in that, The two ends of the guide rod (5) are threaded rods (501), and the rest of the guide rod (5) is a smooth rod (502). The opening size of the guide rod through hole (405) of the sector mounting plate (4) is larger than the maximum outer diameter of the threaded rod (501), and the sector mounting plate (4) can be disengaged from the guide connecting rod (5). A locking nut is installed on the threaded rod (501).

8. The arrangement structure of the radiant tubes in a rotary pyrolysis kiln according to claim 5, characterized in that, The tube body (402) and the radiant tube (2) are machined with a radiant tube hole (404), and a high-temperature resistant bushing is installed in the radiant tube hole (404), and the radiant tube (2) is positioned and installed through the high-temperature resistant bushing.

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