A high seal pyrolysis furnace gas outlet assembly

Abstract

The utility model discloses a kind of high sealing pyrolysis furnace gas outlet components, including stationary settling tank and the rotating central tube inserted in its inside;Double independent compensation type radial sealing mechanism is provided at the joint of both, including the bidirectional sealing isolation ring of floating sleeve in the rotating central tube outside, and graphite packing root group is filled in the filler chamber of its both ends;Utilize front connection assembly and rear connection assembly cooperate elastic compensation piece, respectively independently compress the graphite packing root group of front and rear two groups, force its radial expansion to hold tightly rotating central tube;Stationary settling tank maintenance end is also provided with wedge pressure quick-opening blind plate assembly, realize quick opening and closing by cooperating with wedge slope surface using bayonet lock pawl, and integrated mechanical anti-loose structure;The utility model realizes the automatic compensation and independent adjustment of dynamic and static sealing, and maintenance channel straight-through pipe, with the advantages of reliable sealing, compact structure and convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the field of pyrolysis equipment technology, and in particular to a gas outlet assembly for a high-sealing pyrolysis furnace. Background Technology

[0002] In the pyrolysis treatment process of organic solid waste, the cylinder of the rotary pyrolysis furnace needs to rotate continuously to ensure uniform heating and transmission of materials, while the subsequent condensation and dust removal systems are usually fixed to the ground or supports through static pipes; therefore, dynamic and static sealing devices must be installed at the connection between the rotary furnace cylinder and the static pipes to prevent the leakage of high-temperature pyrolysis gas.

[0003] However, the existing outlet connection structure has significant drawbacks: First, traditional rotary seal structures mostly use single-stage mechanical compression or simple stuffing boxes. Under complex working conditions such as high-temperature thermal expansion, cylinder vibration, and mechanical vibration, the sealing packing lacks an effective automatic compensation mechanism after wear, which can easily lead to seal failure and leakage of harmful gases due to increased gaps. Second, the heavy component tar and dust entrained in the pyrolysis gas are very likely to condense and coke at the outlet diameter change, causing blockage. Existing connection pipelines usually do not have inspection ports, or the inspection cover plates still use traditional bolt flange connections, which are cumbersome and time-consuming to disassemble. Moreover, the bolts are prone to rusting due to tar contamination and high-temperature oxidation, which seriously affects the continuous operation efficiency of the equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a high-sealing pyrolysis furnace gas outlet assembly to solve the problems mentioned in the background art.

[0005] To achieve the above technical objectives, the present invention provides a high-sealing pyrolysis furnace outlet assembly, comprising: a static settling tank and a rotating central tube inserted therein at one end; a dual independent compensation radial sealing mechanism is provided between the rotating central tube and the static settling tank, the mechanism comprising: a bidirectional sealing isolation ring floatingly sleeved outside the rotating central tube, the two axial end faces of the ring being provided with packing cavities and graphite packing assemblies filled therein; a rear pressure-applying flange provided behind the bidirectional sealing isolation ring, which covers the packing cavity at the rear end; and a front connecting assembly and a rear connecting assembly that act independently, both of which are equipped with elastic compensation elements; the front connecting assembly is used to drive the bidirectional sealing isolation ring to generate axial displacement to press the graphite packing assembly at the front end; the rear connecting assembly is used to drive the rear pressure-applying flange to generate axial displacement to press the graphite packing assembly at the rear end; the inspection end of the static settling tank is provided with a quick-opening blind flange assembly, including a cover plate body and a wedge locking mechanism.

[0006] Furthermore, the bidirectional sealing isolation ring has a countersunk bolt groove on its edge; the front connection assembly includes a front connection bolt passing through the groove, with the head of the front connection bolt completely recessed into the countersunk bolt groove; the rear pressure flange spans the opening of the countersunk bolt groove and has no contact with the front connection bolt.

[0007] Furthermore, the rear connection assembly includes a rear connection stud fixed to the rear end face of the bidirectional sealing isolation ring, and the elastic compensation component includes a compensation spring sleeved on the front connection bolt and the rear connection stud, and an adjusting nut that cooperates with it; the bidirectional sealing isolation ring has an oil injection hole that extends through to the inner hole on the solid section between the two packing cavities, and a sealing oil cup is provided in the oil injection hole.

[0008] Furthermore, the wedge locking mechanism includes bayonet locking claws circumferentially distributed on the outside of the cover plate body, as well as a through groove on the outer edge of the flange at the maintenance end of the static settlement box and a wedge-shaped locking slope on the back; the bayonet locking claws can slide along the wedge-shaped locking slope to axially press the cover plate body.

[0009] Furthermore, a radial groove and a telescopic operating handle slidably installed in the radial groove are provided on the outer end face of the cover plate body. A positioning locking pin is provided at the end of the telescopic operating handle. When the cover plate body is rotated to the locking position, the positioning locking pin can be engaged in the through groove to restrict the reverse rotation of the cover plate body.

[0010] Compared with the prior art, the beneficial effects of this utility model include: 1. This utility model adopts a dual independent compensation radial sealing mechanism. The countersunk head design realizes the spatial folding of the front connecting bolt and the rear pressure flange, so that the front and rear seals can be adjusted independently and do not interfere with each other. This structure can effectively compensate for the high temperature thermal expansion and radial runout of the rotating center tube. Combined with the "oil seal + packing" double barrier formed by the intermediate oil injection, it significantly improves the sealing life and stability of the dynamic and static joint surfaces.

[0011] 2. This utility model achieves easy opening and closing of the inspection port by setting a wedge-type quick-opening blind plate at the end of the stationary housing, using the bayonet and wedge-shaped slope to replace the traditional bolt connection; after opening the cover plate, the inspection channel and the rotating center tube are on the same axis, and maintenance personnel can use tools to directly access the inside of the tube to thoroughly scrape off the carbon deposits; with the integrated mechanical anti-loosening locking pin, it not only solves the problem of bolts being hard to remove due to rust, but also ensures safe operation in high temperature and vibration environments. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a high-sealing pyrolysis furnace outlet assembly provided by this utility model; Figure 2 This is a schematic diagram of a dual independent compensation radial sealing mechanism for a high-sealing pyrolysis furnace outlet assembly provided by this utility model. Figure 3 This is a schematic diagram of a quick-opening blind flange assembly for a high-sealing pyrolysis furnace outlet assembly provided by this utility model; Figure 4 This is a cross-sectional schematic diagram of the gas outlet assembly of a high-sealing pyrolysis furnace provided by this utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0014] Example 1 like Figures 1 to 4 As shown, this utility model provides a high-sealing pyrolysis furnace outlet assembly, including a static settling box 1 and a rotating central tube 4.

[0015] The static settling tank 1 has a three-way tubular structure, including an inspection end and a connection end coaxially arranged in the horizontal direction, and an exhaust end arranged in the vertical direction. The exhaust end is used to connect to the subsequent condensation and gas-liquid separation equipment. One end of the rotating central tube 4 is fixedly connected to the rotating cylinder of the pyrolysis furnace body, and the other end is coaxially inserted into the connection end of the static settling tank 1 and extends into the inner cavity of the static settling tank 1. A safety gap is left between the outer cylindrical surface of the rotating central tube 4 and the inner wall of the static settling tank 1, so that the rotating central tube 4 can rotate freely in the static settling tank 1 and expand and contract axially due to thermal expansion.

[0016] To prevent high-temperature pyrolysis gas from leaking from the junction of the rotating central pipe 4 and the static settling tank 1, a dual independent compensating radial sealing mechanism 3 is provided at the connection end. This mechanism mainly includes a bidirectional sealing isolation ring 301, a rear pressure flange 302, a front connecting bolt 309, a rear connecting stud 305, and a graphite packing assembly 307 filled in the sealing cavity.

[0017] Specifically, the bidirectional sealing isolation ring 301 is sleeved on the outside of the rotating central tube 4 and located outside the connecting flange of the static settling tank 1. The inner hole of the bidirectional sealing isolation ring 301 is clearance-fitted with the outer wall of the rotating central tube 4, allowing it to float relative to the rotating central tube 4. Countersunk packing cavities 304 are formed on both axial end faces of the bidirectional sealing isolation ring 301. The packing cavities 304 are filled with graphite packing assemblies 307. In this embodiment, the axial free height of the graphite packing assembly 307 is greater than the depth of the corresponding packing cavity 304, so that in its natural state, a portion of the graphite packing assembly 307 protrudes from the end face of the bidirectional sealing isolation ring 301.

[0018] This embodiment uses a dual independent clamping structure to clamp the packing on both sides separately.

[0019] On the side of the bidirectional sealing isolation ring 301 facing away from the static settlement tank 1, its edge circumferentially has several countersunk bolt grooves 303. The front connecting bolt 309 passes through the through hole at the bottom of the countersunk bolt groove 303 and is fixedly connected to the flange of the static settlement tank 1. It is worth noting that the depth of the countersunk bolt groove 303 is designed to be greater than the head height of the front connecting bolt 309, so that after assembly and locking, the head of the front connecting bolt 309 is completely sunk and accommodated in the countersunk bolt groove 303, and does not protrude from the rear end face of the bidirectional sealing isolation ring 301, forming a void structure.

[0020] On the side of the bidirectional sealing isolation ring 301 facing away from the static settlement tank 1, one end of the rear connecting stud 305 is fixedly embedded in the end face of the bidirectional sealing isolation ring 301. The rear pressure flange 302 is sleeved on the rotating center tube 4 and covers the rear of the bidirectional sealing isolation ring 301. Since the front connecting bolt 309 has been countersunk to avoid gaps, the end face of the rear pressure flange 302 can smoothly cover the opening of the bolt groove 303 without interference. The rear connecting stud 305 extends rearward and passes through the rear pressure flange 302.

[0021] To achieve sealing compensation, both the front connecting bolt 309 and the rear connecting stud 305 are equipped with compensation springs 311 and adjusting nuts 310. Specifically, the compensation spring 311 on the front connecting bolt 309 generates tension to pull the bidirectional sealing isolation ring 301 toward the static settling tank 1, thereby axially pressing the graphite packing assembly 307 located in the front packing cavity 304; the compensation spring 311 on the rear connecting stud 305 pushes the rear pressure flange 302 forward, axially pressing the graphite packing assembly 307 located in the rear packing cavity 304.

[0022] Under the independent action of the two sets of compensating springs 311, the graphite packing assemblies 307 on both sides are axially compressed within the packing cavity 304. Due to their incompressible nature, they undergo radial expansion, thus tightly gripping the outer wall of the rotating central tube 4 and forming a double radial seal. In addition, an oil injection hole 306 extending through to the inner hole is provided on the outer circumference of the bidirectional sealing isolation ring 301. The oil injection hole 306 is located in the solid section between the two packing cavities 304, and a sealing oil cup 308 is installed at the orifice for injecting high-temperature resistant sealing grease between the two seals.

[0023] To facilitate the cleaning of carbon deposits inside the static settling tank 1 and the rotating central tube 4, a wedge-type quick-opening blind flange assembly 2 is provided at the inspection end of the static settling tank 1. This assembly includes a cover plate body 201, and a high-temperature resistant sealing gasket is provided on the mating surface between the cover plate body 201 and the inspection end flange of the static settling tank 1. Several L-shaped locking claws 205 are arranged in a circular array on the outer cylindrical surface of the cover plate body 201. Correspondingly, a passage groove 206 is provided on the outer edge of the inspection end flange of the static settling tank 1 for the axial passage of the locking claws 205, and a wedge-shaped locking slope 204 connected to the passage groove 206 is provided on the back of the flange.

[0024] During operation, the locking claws 205 of the cover plate body 201 are aligned with the through groove 206 and pushed in. Then, the cover plate body 201 is rotated, and the locking claws 205 climb along the wedge-shaped locking slope 204. The force amplification effect of the wedge-shaped surface is used to axially press the cover plate body 201 onto the sealing gasket. To prevent loosening due to vibration, a radial groove 202 and a telescopic operating handle 203 slidably installed in the groove are provided on the outer end face of the cover plate body 201. A positioning locking pin 207 is provided at the end of the handle. When the cover plate is rotated to the locked position, the telescopic operating handle 203 is pushed, causing the positioning locking pin 207 to engage in the through groove 206, achieving mechanical anti-loosening.

[0025] The working principle of this utility model is as follows: When the pyrolysis furnace is working, the rotating central tube 4 rotates with the furnace body. The bidirectional sealing isolation ring 301 is floatingly supported on the rotating central tube 4 by the graphite packing assembly 307. When the graphite packing assembly 307 shrinks in volume due to wear, the compensating springs 311 on both sides release potential energy to automatically compensate for the gap and maintain a constant sealing pressure. When maintenance is required, the positioning locking pin 207 can be pulled out and the cover plate body 201 can be quickly removed by rotating it in the opposite direction. Maintenance personnel can directly access the rotating central tube 4 through the maintenance end using a long-handled tool through the static settling box 1 to clean the carbon deposits.

[0026] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A gas outlet assembly for a high-sealing pyrolysis furnace, characterized in that, The system includes a static settling tank (1) and a rotating central tube (4) inserted into it at one end. A dual independent compensating radial sealing mechanism (3) is provided between the rotating central tube (4) and the static settling tank (1). The mechanism includes a bidirectional sealing isolation ring (301) that floats outside the rotating central tube (4). Each of the two axial end faces of the ring is provided with a packing cavity (304) and a graphite packing assembly (307) filled therein. A rear pressure flange (302) is provided behind the bidirectional sealing isolation ring (301) and covers the packing cavity at the rear end. (304) on; and a front connection assembly and a rear connection assembly that function independently, both of which are equipped with elastic compensation components; the front connection assembly is used to drive the bidirectional sealing isolation ring (301) to generate axial displacement to press the graphite packing group (307) at the front end; the rear connection assembly is used to drive the rear pressure flange (302) to generate axial displacement to press the graphite packing group (307) at the rear end; the maintenance end of the static settlement box (1) is provided with a quick-opening blind flange assembly (2), including a cover plate body (201) and a wedge locking mechanism.

2. The gas outlet assembly of a high-sealing pyrolysis furnace according to claim 1, characterized in that, The bidirectional sealing isolation ring (301) has a countersunk bolt groove (303) on its edge; the front connection assembly includes a front connection bolt (309) that passes through the groove, and the head of the front connection bolt (309) is completely recessed into the countersunk bolt groove (303); the rear pressure flange (302) spans the opening of the countersunk bolt groove (303) and has no contact with the front connection bolt (309).

3. The gas outlet assembly of a high-sealing pyrolysis furnace according to claim 2, characterized in that, The rear connection assembly includes a rear connection stud (305) fixed to the rear end face of the bidirectional sealing isolation ring (301). The elastic compensation component includes a compensation spring (311) sleeved on the front connection bolt (309) and the rear connection stud (305) and an adjusting nut (310) cooperating with it. The bidirectional sealing isolation ring (301) has an oil injection hole (306) extending through to the inner hole on the solid section between the two packing cavities (304). A sealing oil cup (308) is provided in the oil injection hole (306).

4. The gas outlet assembly of a high-sealing pyrolysis furnace according to claim 2 or 3, characterized in that, The wedge locking mechanism includes a locking claw (205) circumferentially distributed on the outside of the cover plate body (201), a through groove (206) on the outer edge of the inspection end flange of the static settlement box (1), and a wedge-shaped locking slope (204) on the back; the locking claw (205) can slide along the wedge-shaped locking slope (204) to axially press the cover plate body (201).

5. The gas outlet assembly of a high-sealing pyrolysis furnace according to claim 4, characterized in that, The outer end face of the cover plate body (201) is provided with a radial groove (202) and a telescopic operating handle (203) slidably installed in the radial groove (202). The end of the telescopic operating handle (203) is provided with a positioning locking pin (207). When the cover plate body (201) is rotated to the locking position, the positioning locking pin (207) can be engaged in the through groove (206) to restrict the cover plate body (201) from rotating in the opposite direction.

Images