Coke cleaning system for dichloroethane cracking furnace

Abstract

The utility model relates to the technical field of cracking furnaces, in particular to a coke cleaning system of a dichloroethane cracking furnace, which comprises a cracking furnace body, a furnace tube is arranged in the cracking furnace body, two connecting sleeves are fixedly connected to two ends of the furnace tube, the bottom ends of the connecting sleeves are fixedly connected to a support frame, and the support frame is fixedly connected to the cracking furnace body. A connecting plate is detachably connected to one side of the connecting sleeve through a plurality of bolts, a connecting pipe is fixedly connected to the connecting plate, a motor is installed on the connecting plate, a gear is fixedly connected to an output shaft of the motor, rotating rings are rotationally connected to the connecting sleeve, a gear ring is fixedly connected to the rotating rings, the gear is meshed with the gear ring, and a scraper is fixedly connected between the two rotating rings. One side of the scraper abuts against the inner side of the furnace tube, and a collecting structure is arranged at the bottom end of the furnace tube. And coke on the inner wall of the furnace tube of the cracking furnace can be conveniently cleaned, so that the damage to the furnace tube can be avoided while the heat transfer efficiency is ensured, and the use safety is effectively improved.

Description

Technical Field

[0001] The utility model relates to a cracking furnace coke cleaning system, in particular to a dichloroethane cracking furnace coke cleaning system, belonging to the technical field of cracking furnaces. Background Art

[0002] In the process of vinyl chloride production, ethylene dichloride needs to be cracked in a box-type cracking furnace to produce vinyl chloride and hydrogen chloride. During the cracking process, the raw materials will enter the furnace tube of the box-type cracking furnace for heating, and the heated raw materials will produce a cracking reaction inside the furnace tube.

[0003] However, the high-temperature cracking reaction of ethylene dichloride will generate coke, which is easy to adhere to the inner wall of the cracking furnace tube. If it is not cleaned in time, it will accumulate more and more, causing the heat transfer efficiency of the tube wall to gradually decrease, energy consumption to increase, and the temperature of the tube wall to rise. The high-temperature operation of the cracking furnace tube will shorten its service life, and when the temperature exceeds the tolerance limit of the furnace tube material, the furnace tube will be damaged, resulting in poor safety of use. Utility Model Content

[0004] The purpose of the utility model is to provide a dichloroethane cracking furnace coke cleaning system in order to solve the above-mentioned problem, which is convenient for cleaning the coke on the inner wall of the cracking furnace tube, thereby ensuring the heat transfer efficiency while avoiding damage to the furnace tube, and effectively improving the safety of use.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: a decoking system for a dichloroethane cracking furnace, comprising a cracking furnace body, a furnace pipe is arranged inside the cracking furnace body, two connecting sleeves are fixedly connected at both ends of the furnace pipe, the bottom end of the connecting sleeve is fixedly connected to a support frame, the support frame is fixedly connected to the cracking furnace body, one side of the connecting sleeve is detachably connected with a connecting plate through a plurality of bolts, a connecting pipe is fixedly connected to the connecting plate, a cleaning structure is arranged on the connecting plate, the cleaning structure comprises a motor and a gear, a motor is mounted on the connecting plate, a gear is fixedly connected to the output shaft of the motor, a swivel is rotatably connected to the connecting sleeve, a gear ring is fixedly connected to the swivel, the gear is meshed with the gear ring, a scraper is fixedly connected between the two swivels, one side of the scraper is in conflict with the inner side of the furnace pipe, and a collecting structure is arranged at the bottom end of the furnace pipe.

[0006] Preferably, the cross-section of one end of the connecting pipe is T-shaped, and the scraper is spiral.

[0007] Preferably, the collecting structure comprises a connecting frame and a collecting box, the bottom end of the furnace tube is fixedly connected to two connecting frames, and the collecting box is clamped on the connecting frame.

[0008] Preferably, a handle is fixedly connected to one side of the collection box, and a slot is provided on one side of the collection box.

[0009] Preferably, the slot is arranged in the middle of one side of the collection box, and the cross-section of the handle end is an L-shaped structure.

[0010] Preferably, a fixing structure is provided on the connecting frame, and the fixing structure includes a connecting rod and a rotating rod. The connecting frame is rotatably connected to the connecting rod, and the end of the connecting rod is threadedly connected to a screw.

[0011] Preferably, one end of the screw rod extends to the inside of the slot, and one end of the screw rod abuts against the collection box.

[0012] Preferably, one end of the screw rod is fixedly connected to a rotating rod, and the rotating rod passes through the screw rod and is perpendicular to the screw rod.

[0013] The beneficial effect of the utility model is that when it is necessary to clean the coke attached to the inner wall of the furnace tube, two motors can be started at the same time, the output shaft of the motor rotates to drive the gear to rotate, the gear rotation drives the ring gear to rotate, the ring gear rotation drives the rotating ring to rotate, the two rotating rings rotate at the same time to drive the scraper to rotate, and the scraper will scrape off the coke attached to the inner wall of the furnace tube while rotating, thereby cleaning the coke on the inner wall of the furnace tube, avoiding the reduction of heat conduction efficiency due to the attachment of more coke to the inner wall of the furnace tube, and avoiding the furnace tube from being damaged due to excessive temperature, thereby effectively improving the safety of use, and because the scraper has a spiral structure, it will move the scraped coke to the inside of the collecting structure for collection while rotating, thereby realizing the automatic collection of the coke after cleaning, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure between the furnace tube and the scraper of the utility model;

[0016] Figure 3 for Figure 2 An enlarged schematic diagram of part A is shown;

[0017] Figure 4 This is a schematic diagram of the connection structure between the collection box and the handle of the utility model;

[0018] Figure 5 It is a schematic diagram of the connection structure between the gear ring and the swivel of the utility model.

[0019] In the figure: 1, cracking furnace body; 2, furnace tube; 3, support frame; 4, connecting sleeve; 5, connecting plate; 6, connecting pipe; 7, cleaning structure; 701, motor; 702, gear; 703, gear ring; 704, rotating ring; 705, scraper; 8, collecting structure; 801, connecting frame; 802, collecting box; 803, handle; 804, slot; 9, fixing structure; 901, rotating rod; 902, rotating rod; 903, screw. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and through specific implementation methods. Among them, the accompanying drawings are only used for exemplary descriptions, and only represent schematic diagrams rather than physical drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] See also Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, a decoking system for a dichloroethane cracking furnace comprises a cracking furnace body 1, wherein a furnace tube 2 is arranged inside the cracking furnace body 1, two connecting sleeves 4 are fixedly connected at both ends of the furnace tube 2, the bottom end of the connecting sleeve 4 is fixedly connected to a support frame 3, the support frame 3 is fixedly connected to the cracking furnace body 1, one side of the connecting sleeve 4 is detachably connected to a connecting plate 5 by a plurality of bolts, a connecting pipe 6 is fixedly connected to the connecting plate 5, a cleaning structure 7 is arranged on the connecting plate 5, the cleaning structure 7 comprises a motor 701 and a gear 702, the connecting plate 5 is mounted with a motor 701, the output shaft of the motor 701 is fixedly connected with a gear 702, a swivel 704 is rotatably connected to the connecting sleeve 4, a gear ring 703 is fixedly connected to the swivel 704, the gear 702 is meshed with the gear ring 703, a scraper 705 is fixedly connected between the two swivels 704, one side of the scraper 705 abuts against the inner side of the furnace tube 2, and a collecting structure 8 is arranged at the bottom end of the furnace tube 2.

[0023] As a technical optimization solution of the utility model, Figure 2 and Figure 3 As shown, the cross section of one end of the connecting pipe 6 is T-shaped, and the scraper 705 is spirally structured, so that the cleaned coke slag can be pushed into the collecting box 802 for collection while the scraper 705 rotates.

[0024] As a technical optimization solution of the utility model, Figure 1 and Figure 4 As shown, the collecting structure 8 includes a connecting frame 801 and a collecting box 802 . The bottom end of the furnace tube 2 is fixedly connected with two connecting frames 801 . The collecting box 802 is engaged with the connecting frame 801 . Therefore, the cleaned coke residue can be centrally collected through the collecting box 802 .

[0025] As a technical optimization solution of the utility model, Figure 3 As shown, a handle 803 is fixedly connected to one side of the collection box 802, and a slot 804 is provided on one side of the collection box 802. The slot 804 is provided in the middle of one side of the collection box 802, and the cross-section of the end of the handle 803 is an L-shaped structure, so the collection box 802 can be conveniently moved by the handle 803.

[0026] As a technical optimization solution of the utility model, Figure 1 and Figure 2As shown, the connecting frame 801 is provided with a fixing structure 9, and the fixing structure 9 includes a connecting rod 901 and a rotating rod 902. The connecting frame 801 is rotatably connected with the connecting rod 901, and the end of the connecting rod 901 is threadedly connected with a screw 903, so that the collecting box 802 can be fixed, thereby improving the sealing between the collecting box 802 and the connecting frame 801.

[0027] As a technical optimization solution of the utility model, Figure 1 and Figure 2 As shown, one end of the screw 903 extends to the inside of the slot 804, one end of the screw 903 interferes with the collection box 802, and one end of the screw 903 is fixedly connected to a rotating rod 902, which passes through the screw 903 and is perpendicular to the screw 903, so that the screw 903 can be easily rotated by the rotating rod 902.

[0028] When the utility model is in use, the external pipeline can be connected to the ends of the two connecting pipes 6 respectively, and then the raw material can be introduced into the interior of the furnace tube 2 from one of the connecting pipes 6, and the furnace tube 2 can be heated by the cracking furnace body 1, so that the raw material inside the furnace tube 2 is cracked, and the cracked gas will be discharged from the other connecting pipe 6. During the cracking process, coke will be attached to the inner wall of the furnace tube 2. When it is necessary to clean the coke attached to the inner wall of the furnace tube 2, the two motors 701 can be started at the same time, and the output shaft of the motor 701 rotates to drive the gear 702 to rotate, and the rotation of the gear 702 drives the gear ring 703 to rotate, and the rotation of the gear ring 703 drives the rotating ring 704 to rotate, and the two rotating rings 704 rotate at the same time to drive the scraper 705 to rotate, and the scraper 705 scrapes the coke attached to the inner wall of the furnace tube 2 while rotating, thereby achieving the cleaning of the furnace tube. 2, the cleaning of the coke on the inner wall of the furnace tube 2 avoids the reduction of the efficiency of heat conduction due to the attachment of too much coke on the inner wall of the furnace tube 2, and at the same time avoids the damage of the furnace tube 2 due to excessive temperature, thereby effectively improving the safety of use. Moreover, since the scraper 705 has a spiral structure, the scraped coke will move to the inside of the collecting box 802 for collection during rotation, thereby realizing the automatic collection of the cleaned coke. When it is necessary to clean the coke residue collected in the collecting box 802, the screw 903 can be rotated by the rotating rod 902. When the screw 903 is disengaged from the slot 804, the connecting rod 901 can be rotated. When the connecting rod 901 is rotated to a certain angle, it will not resist the collecting box 802. At this time, the collecting box 802 can be pulled out from the inside of the connecting frame 801 by holding the handle 803. After the collecting box 802 is pulled out, the coke residue collected inside it can be dumped.

[0029] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A decoking system for an ethylene dichloride cracking furnace, comprising a cracking furnace body (1), characterized in that: A furnace tube (2) is provided inside the cracking furnace body (1), two connecting sleeves (4) are fixedly connected to the two ends of the furnace tube (2), the bottom end of the connecting sleeve (4) is fixedly connected to a support frame (3), the support frame (3) is fixedly connected to the cracking furnace body (1), one side of the connecting sleeve (4) is detachably connected to a connecting plate (5) via a plurality of bolts, a connecting tube (6) is fixedly connected to the connecting plate (5), a cleaning structure (7) is provided on the connecting plate (5), and the cleaning structure (7) comprises a motor (701) and a gear (702). A motor (701) is mounted on the connecting plate (5), a gear (702) is fixedly connected to the output shaft of the motor (701), a rotating ring (704) is rotatably connected to the connecting sleeve (4), a gear ring (703) is fixedly connected to the rotating ring (704), the gear (702) and the gear ring (703) are meshed, a scraper (705) is fixedly connected between the two rotating rings (704), one side of the scraper (705) is in contact with the inner side of the furnace tube (2), and a collecting structure (8) is provided at the bottom end of the furnace tube (2).

2. The decoking system for an ethylene dichloride cracking furnace according to claim 1, characterized in that: The cross section of one end of the connecting pipe (6) is in a T-shaped structure, and the scraper (705) is in a spiral structure.

3. The decoking system for ethylene dichloride cracking furnace according to claim 1, characterized in that: The collecting structure (8) comprises a connecting frame (801) and a collecting box (802); the bottom end of the furnace tube (2) is fixedly connected to two connecting frames (801); and the collecting box (802) is engaged with the connecting frame (801).

4. The decoking system for ethylene dichloride cracking furnace according to claim 3, characterized in that: A handle (803) is fixedly connected to one side of the collection box (802), and a slot (804) is provided on one side of the collection box (802).

5. The decoking system for ethylene dichloride cracking furnace according to claim 4, characterized in that: The slot (804) is arranged in the middle of one side of the collection box (802), and the cross section of the end of the handle (803) is in an L-shaped structure.

6. The decoking system for ethylene dichloride cracking furnace according to claim 3, characterized in that: The connection frame (801) is provided with a fixing structure (9), the fixing structure (9) comprising a connecting rod (901) and a rotating rod (902), the connection frame (801) is rotatably connected with the connecting rod (901), and the end of the connecting rod (901) is threadedly connected with a screw rod (903).

7. The decoking system for ethylene dichloride cracking furnace according to claim 6, characterized in that: One end of the screw rod (903) extends to the inside of the slot (804), and one end of the screw rod (903) is in conflict with the collection box (802).

8. The decoking system for ethylene dichloride cracking furnace according to claim 6, characterized in that: One end of the screw rod (903) is fixedly connected to a rotating rod (902), and the rotating rod (902) passes through the screw rod (903) and is perpendicular to the screw rod (903).

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