An improved structure for coking on the inner wall of a cracking furnace for acetylene production

Abstract

The present application relates to the technical field of acetylene production, in particular to a coking improvement structure for the inner wall of a cracking furnace for acetylene production, comprising a cracking furnace body, a furnace cover is arranged on the top of the cracking furnace body, and a feeding port is further arranged on the top of the furnace cover. The coking on the inner wall of the cracking furnace body is cleaned by the scraping mechanism, effectively avoiding the coking phenomenon between acetylene and the inner wall of the cracking furnace body, and the backflow hydrogen is blown out into the cracking furnace body by the scraping mechanism. While the coking on the inner wall of the cracking furnace body is scraped by the scraping mechanism, a gas curtain is generated on one side of the inner wall of the cracking furnace body, effectively isolating the contact between acetylene and the inner wall of the cracking furnace body. By isolating the contact between acetylene and the inner wall of the cracking furnace body, the inner wall of the cracking furnace body is scraped, which can more completely coke the inner wall of the cracking furnace body, and significantly improve the production efficiency of the cracking furnace for acetylene.

Description

Technical Field

[0001] This invention relates to the field of acetylene production technology, specifically to an improved structure for coking on the inner wall of a pyrolysis furnace used in acetylene production. Background Technology

[0002] Acetylene is an organic compound with the chemical formula C2H2, commonly known as coal gas or carbide gas. It is the smallest member of the alkyne compounds, a colorless gas at room temperature and pressure, slightly soluble in water, soluble in ethanol, acetone, chloroform, and benzene, and miscible in diethyl ether. It is one of the important raw materials for organic synthesis, and is also a monomer for synthetic rubber, synthetic fibers, and plastics. It can also be used in oxyacetylene welding and cutting.

[0003] Acetylene is generally produced by autothermal pyrolysis under air-isolated conditions. In acetylene pyrolysis units, coking in the pyrolysis furnace and quench boiler is a major problem affecting the long-term operation of the unit. The causes of coking are: (1) dehydrogenation and carbonization reaction formed by the high-temperature secondary reaction of the raw material in the pyrolysis reaction; (2) high-temperature pyrolysis gas enters the quench boiler, and the high-boiling-point components condense on the low-temperature tube wall and come into contact with the high-temperature pyrolysis gas for a long time, resulting in dehydrogenation, condensation and other reactions to form coke with extremely low hydrogen content. Coking will cause two consequences. On the one hand, coking will reduce the heat transfer performance of the pyrolysis furnace tube. In order to maintain the normal temperature of the material in the tube, the temperature of the outer wall of the furnace tube must be increased, which can easily reach the high temperature limit that the metal material of the furnace tube can withstand and damage the furnace tube. On the other hand, coking in the furnace tube will reduce the tube diameter. When the throughput remains unchanged, the residence time of the material in the furnace will be reduced, and the pressure drop in the furnace tube will also increase. This change in pyrolysis process conditions can worsen the selectivity of pyrolysis, resulting in a significant decrease in the yield of the target product acetylene. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a coking improvement structure for the inner wall of a pyrolysis furnace used in acetylene production, which thoroughly improves the coking problem on the inner wall of the pyrolysis furnace.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a coking improvement structure for the inner wall of a pyrolysis furnace for acetylene production, comprising a pyrolysis furnace body, a furnace cover at the top of the pyrolysis furnace body, a feed inlet at the top of the furnace cover, a burner at the lower part of the interior of the pyrolysis furnace body, a discharge pipe at the bottom of the pyrolysis furnace body, a scraping mechanism inside the pyrolysis furnace body, a reflux assembly on the outer circumferential surface of the pyrolysis furnace body, and a drive assembly on the outer circumferential surface of the pyrolysis furnace body;

[0006] The scraping mechanism includes a movable frame. The movable frame is provided inside the pyrolysis furnace body. Air blowing frames are provided at the top and bottom of the movable frame. Several scrapers are provided on the outer periphery of the movable frame. Cooling channels are provided inside the movable frame. Air channels are provided inside the movable frame. The interior of the air channels are respectively connected to the interior of the two air blowing frames.

[0007] The reflux assembly includes a reflux pipe. A booster pump is provided on the outer peripheral surface of the pyrolysis furnace body, and a reflux pipe is provided at the top of the booster pump. A filter pipe is provided at the bottom of the booster pump, and the bottom of the filter pipe is connected to the inside of the discharge pipe. The top of the reflux pipe extends into the inside of the pyrolysis furnace body.

[0008] The drive assembly includes a fixed frame. The fixed frame is provided on the outer peripheral surface of the pyrolysis furnace body, and two circulating pumps are provided inside the fixed frame. Guide pipes are provided at the top and bottom of the fixed frame, and the two ends of the guide pipes are respectively connected to the ports of the two circulating pumps. Water guide pipes are provided at the top and bottom of the fixed frame, and one end of the two water guide pipes is respectively connected to the interior of the two guide pipes.

[0009] Preferably, the two ends of the guide pipe are connected to the inlet and outlet of the two circulating pumps, respectively.

[0010] Preferably, the inner wall of the pyrolysis furnace body is provided with a drive frame, and one end of the water guide pipe is connected to the interior of the drive frame. The drive frame is provided with a through groove on the side near the movable frame, and several drive gears are rotatably arranged inside the through groove.

[0011] Preferably, the drive frame has rotating grooves on both sides, and several impellers are rotatably arranged inside the rotating grooves. The top end of the water guide pipe is connected to the inside of the rotating grooves, and one end of each of the several impellers is connected to one end of a several drive gears.

[0012] Preferably, the outer peripheral surface of the movable frame is provided with four grooves, and a transmission rack is provided on one side of the inner wall of the groove, and the surface of the drive gear meshes with one side of the transmission gear for transmission.

[0013] When the movable frame is driven up and down inside the pyrolysis furnace, the direction of water delivery inside the water guide pipe is controlled by selecting the operation of the circulating pump. As the water flows from bottom to top inside the water guide pipe, the water circulates from top to bottom inside the drive frame. The circulating water flow drives the impeller to rotate inside the rotating groove. The impeller drives the drive gear to rotate clockwise inside the through groove. The clockwise rotating drive gear meshes with the teeth on one side of the transmission rack, allowing the drive gear to drive the movable frame to move downward along the drive frame. The scraper set on the outer circumference of the movable frame cleans the coking deposits on the inner wall of the pyrolysis furnace.

[0014] Preferably, four drive frames are arranged inside the pyrolysis furnace body, and the four drive frames are arranged at equal angles about the central axis of the pyrolysis furnace body. Three water guide pipes are arranged on the outer circumference of the pyrolysis furnace body, and one end of each of the three water guide pipes is connected to the interior of the three drive frames.

[0015] Preferably, the top end of the return pipe is connected to the interior of another drive frame, and both drive frames are provided with a guide groove, and a sealing groove is provided on one side of the guide groove.

[0016] Preferably, the top and bottom of the sealing groove are provided with telescopic plates, and the outer periphery of the movable frame is also provided with an air inlet pipe and a water inlet pipe, with one end of the air inlet pipe and the water inlet pipe located inside the two grooves respectively.

[0017] Preferably, one end of the air inlet pipe and the water inlet pipe extends into the interior of the two guide troughs, and the top and bottom of the air inlet pipe and the water inlet pipe are respectively connected to one side of the two telescopic plates.

[0018] Preferably, both ends of the water inlet pipe are connected to the interior of the cooling channel, and one end of the air inlet pipe is connected to the interior of the air channel.

[0019] Preferably, the working principle of improving the coking structure of the inner wall of a pyrolysis furnace for acetylene production specifically includes the following steps:

[0020] Step 1: Acetylene gas is fed into the pyrolysis furnace through the feed port. Inside the pyrolysis furnace, the acetylene gas is subjected to high-temperature pyrolysis by a burner. Finally, the product is discharged through the discharge pipe.

[0021] Step 2: By selecting the operation of the circulating pump, the water flow inside the water guide pipe flows from bottom to top, and the water flow circulates from top to bottom inside the drive frame. The circulating water flow drives the impeller to rotate inside the rotating groove. The impeller drives the drive gear to rotate clockwise inside the through groove. The clockwise rotating drive gear meshes with the teeth on one side of the transmission rack, allowing the drive gear to drive the movable frame to move downward along the drive frame. The scraper set on the outer circumference of the movable frame cleans the coking on the inner wall of the pyrolysis furnace body.

[0022] Step 3: When cleaning the coking on the inner wall of the pyrolysis furnace, the drive gears inside the two opposing drive frames drive the movable frame to move up and down inside the pyrolysis furnace. At the same time, hydrogen gas is injected into the blowing frame through the air channel via the air inlet pipe. The hydrogen gas creates a gas curtain on one side of the inner wall of the pyrolysis furnace, which isolates the acetylene from contact with the inner wall of the pyrolysis furnace. While the movable frame is being driven up and down, circulating coolant is sent into the cooling channel through the water inlet pipe to cool the movable frame and scraper.

[0023] Compared with existing technologies, it has the following advantages:

[0024] 1. Hydrogen gas from the product is filtered and pressurized by the reflux assembly and then sent into the scraping mechanism. Simultaneously, the drive assembly drives the scraping mechanism up and down, causing it to reciprocate within the pyrolysis furnace. This scraping mechanism cleans the coking deposits on the inner wall of the pyrolysis furnace, effectively preventing coking between acetylene and the furnace wall. At the same time, the scraping mechanism blows the refluxed hydrogen gas into the pyrolysis furnace, forming a gas curtain on one side of the furnace wall. This gas curtain isolates acetylene from the interior of the pyrolysis furnace. This technology, by using a scraping mechanism to scrape away coking material from the inner wall of the pyrolysis furnace while simultaneously creating a gas curtain on one side of the furnace, effectively isolates acetylene from contact with the furnace's inner wall. This separation, combined with scraping, more thoroughly removes coking material from the furnace's inner wall, significantly improving its acetylene production efficiency.

[0025] 2. The movable frame moves up and down inside the pyrolysis furnace body through the drive gears inside the two opposing drive frames. At the same time, hydrogen gas is injected into the blowing frame through the air channel via the air inlet pipe. The hydrogen gas creates a gas curtain on one side of the inner wall of the pyrolysis furnace body, effectively isolating the acetylene from contact with the inner wall of the pyrolysis furnace body. When the movable frame is driven up and down, circulating coolant is sent into the cooling channel through the water inlet pipe to cool the movable frame and scraper. This effectively avoids the movable frame and scraper being affected by high temperature, ensuring that the scraping mechanism effectively improves coking inside the pyrolysis furnace body. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of an improvement structure for coking on the inner wall of a pyrolysis furnace used in acetylene production, according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the pyrolysis furnace body and furnace cover structure according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the pyrolysis furnace body according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the movable frame and air blowing frame structure according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the movable frame and cooling channel structure according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the fixing frame according to an embodiment of the present invention;

[0032] Figure 7 This is a top view of the internal structure of the drive frame according to an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the internal structure of the drive frame according to an embodiment of the present invention.

[0034] In the diagram, 10 is the pyrolysis furnace body; 20 is the furnace cover; 30 is the feed inlet; 40 is the burner; 50 is the discharge pipe; 11 is the movable frame; 12 is the air blowing frame; 13 is the scraper; 14 is the cooling channel; 15 is the air channel; 21 is the return pipe; 22 is the booster pump; 23 is the filter pipe; 31 is the fixed frame; 32 is the circulating pump; 33 is the guide pipe; 34 is the water guide pipe; 35 is the drive frame; 36 is the through groove; 37 is the drive gear; 38 is the rotating groove; 39 is the impeller; 310 is the groove; 311 is the transmission rack; 312 is the transmission gear; 41 is the material guide chute; 42 is the sealing groove; 43 is the telescopic plate; 44 is the air inlet pipe; and 45 is the water inlet pipe. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] Please see Figures 1 to 8 As shown, a coking improvement structure for the inner wall of a pyrolysis furnace for acetylene production includes a pyrolysis furnace body 10, a furnace cover 20 at the top of the pyrolysis furnace body 10, a feed inlet 30 at the top of the furnace cover 20, a burner 40 at the lower part of the interior of the pyrolysis furnace body 10, a discharge pipe 50 at the bottom of the pyrolysis furnace body 10, a scraping mechanism inside the pyrolysis furnace body 10, a reflux assembly on the outer periphery of the pyrolysis furnace body 10, and a drive assembly on the outer periphery of the pyrolysis furnace body 10.

[0038] It should be noted that when producing acetylene using the pyrolysis furnace body 10, acetylene gas is introduced into the pyrolysis furnace body 10 through the feed inlet 30. Inside the pyrolysis furnace body 10, the acetylene gas undergoes high-temperature pyrolysis treatment using the burner 40. The product is then discharged through the discharge pipe 50. The hydrogen in the product is filtered and pressurized by the reflux assembly before being sent into the scraping mechanism. Simultaneously, the drive assembly drives the scraping mechanism up and down, causing it to reciprocate inside the pyrolysis furnace body 10. The scraping mechanism cleans the coking on the inner wall of the pyrolysis furnace body 10, effectively preventing coking between the acetylene and the inner wall of the pyrolysis furnace body 10. At the same time, the scraping mechanism blows the refluxed hydrogen into the pyrolysis furnace body 10. The blown hydrogen gas forms a gas curtain on one side of the inner wall of the pyrolysis furnace body 10. This gas curtain isolates acetylene from the inner wall of the pyrolysis furnace body 10, thereby preventing acetylene from coking on the inner wall of the pyrolysis furnace body 10. Compared with the existing technology that generates a gas curtain inside the pyrolysis furnace body 10, this technical solution uses a scraping mechanism to scrape away coking material from the inner wall of the pyrolysis furnace body 10 while simultaneously generating a gas curtain on one side of the inner wall of the pyrolysis furnace body 10. This effectively isolates acetylene from contact with the inner wall of the pyrolysis furnace body 10. By creating a barrier between acetylene and the inner wall of the pyrolysis furnace body 10 while scraping away coking material, the coking treatment of the inner wall of the pyrolysis furnace body 10 can be more thorough, significantly improving the acetylene production efficiency of the pyrolysis furnace body 10.

[0039] Example 2

[0040] Furthermore, the scraping mechanism includes a movable frame 11. The movable frame 11 is provided inside the pyrolysis furnace body 10, and air blowing frames 12 are provided at the top and bottom of the movable frame 11. Several scrapers 13 are provided on the outer peripheral surface of the movable frame 11, and a cooling channel 14 is provided inside the movable frame 11. An air channel 15 is provided inside the movable frame 11, and the interior of the air channel 15 is connected to the interior of the two air blowing frames 12 respectively.

[0041] Furthermore, the reflux assembly includes a reflux pipe 21, a booster pump 22 is provided on the outer peripheral surface of the pyrolysis furnace body 10, and a reflux pipe 21 is provided at the top of the booster pump 22. A filter pipe 23 is provided at the bottom of the booster pump 22, and the bottom of the filter pipe 23 is connected to the interior of the discharge pipe 50. The top of the reflux pipe 21 extends into the interior of the pyrolysis furnace body 10.

[0042] Furthermore, the drive assembly includes a fixed frame 31. The fixed frame 31 is provided on the outer peripheral surface of the pyrolysis furnace body 10, and two circulating pumps 32 are provided inside the fixed frame 31. Guide pipes 33 are provided at both the top and bottom of the fixed frame 31, and the two ends of the guide pipes 33 are respectively connected to the ports of the two circulating pumps 32. Water guide pipes 34 are provided at the top and bottom of the fixed frame 31, and one end of each water guide pipe 34 is connected to the interior of the two guide pipes 33. The two ends of the guide pipes 33 are respectively connected to the inlet and outlet of the two circulating pumps 32, enabling water to be supplied to the water guide pipes 34 from top to bottom or from bottom to top through the two circulating pumps 32. The inner wall of the pyrolysis furnace body 10 is provided with a drive assembly. The drive frame 35 has a movable frame 35, and one end of the water pipe 34 is connected to the interior of the drive frame 35. The drive frame 35 has a through groove 36 on the side near the movable frame 11, and several drive gears 37 are rotatably arranged inside the through groove 36. Rotating grooves 38 are provided on both sides inside the drive frame 35, and several impellers 39 are rotatably arranged inside the rotating grooves 38. The top end of the water pipe 34 is connected to the interior of the rotating grooves 38. One end of each of the several impellers 39 is connected to one end of each of the several drive gears 37. The outer circumferential surface of the movable frame 11 has four grooves 310, and one side of the inner wall of the grooves 310 has a transmission rack 311. The surface of the drive gear 37 meshes with one side of the transmission gear 312 for transmission.

[0043] It should be noted that when the movable frame 11 is driven up and down inside the pyrolysis furnace body 10, the direction of water delivery inside the water guide pipe 34 is controlled by selecting the operation of the circulating pump 32. When the water flow inside the water guide pipe 34 flows from bottom to top, the water flow circulates from top to bottom inside the drive frame 35. The circulating water flow drives the impeller 39 to rotate inside the rotating groove 38. The impeller 39 drives the drive gear 37 to rotate clockwise inside the through groove 36. The clockwise rotating drive gear 37 meshes with the teeth on one side of the transmission rack 311, allowing the drive gear 37 to drive the movable frame 11 to move downward along the drive frame 35. The scraper 13 set on the outer circumference of the movable frame 11 cleans the coking on the inner wall of the pyrolysis furnace body 10.

[0044] Furthermore, four drive frames 35 are located inside the pyrolysis furnace body 10, and the four drive frames 35 are distributed at equal angles about the central axis of the pyrolysis furnace body 10. Three water guide pipes 34 are located on the outer circumference of the pyrolysis furnace body 10, and one end of each of the three water guide pipes 34 is connected to the interior of one of the three drive frames 35. The top end of the return pipe 21 is connected to the interior of another drive frame 35. Each of the two opposing drive frames 35 is provided with a material guide trough 41, and a sealing groove 42 is provided on one side of the material guide trough 41. Telescopic plates 43 are provided at the top and bottom of the sealing groove 42. An air inlet pipe 44 and a water inlet pipe 45 are also provided on the outer circumference of the movable frame 11. One end is located inside the two grooves 310 respectively. One end of the air inlet pipe 44 and the water inlet pipe 45 extends into the interior of the two guide troughs 41 respectively. The top and bottom of the air inlet pipe 44 and the water inlet pipe 45 are respectively connected to one side of the two telescopic plates 43. Both ends of the water inlet pipe 45 are connected to the interior of the cooling channel 14. One end of the air inlet pipe 44 is connected to the interior of the air channel 15. The water inlet pipe 45 has two ports on one side inside the guide trough 41. Two one-way valves are installed inside the two ports respectively. One one-way valve allows the material inside the guide trough 41 to enter the interior of the cooling channel 14. The other one-way valve allows the water inside the cooling channel 14 to enter the guide trough 41.

[0045] It should be noted that when cleaning the coking on the inner wall of the pyrolysis furnace body 10, the drive gears 37 inside the two opposing drive frames 35 drive the movable frame 11 to move up and down inside the pyrolysis furnace body 10. At the same time, the air inlet pipe 44 introduces recirculated hydrogen into the air blowing frame 12 through the air flow channel 15. The hydrogen generates a gas curtain on one side of the inner wall of the pyrolysis furnace body 10, effectively isolating the contact between acetylene and the inner wall of the pyrolysis furnace body 10. Furthermore, when the movable frame 11 is driven up and down, circulating coolant is introduced into the cooling flow channel 14 through the water inlet pipe 45 to cool the movable frame 11 and the scraper 13. This effectively prevents the movable frame 11 and the scraper 13 from being affected by high temperatures, ensuring that the scraping mechanism effectively improves coking inside the pyrolysis furnace body 10.

[0046] Example 3

[0047] Furthermore, this embodiment also discloses a working principle for improving the coking structure of the inner wall of a pyrolysis furnace used in acetylene production, specifically including the following steps:

[0048] Step 1: Acetylene gas is fed into the interior of the pyrolysis furnace body 10 through the feed port 30. The acetylene gas is then subjected to high-temperature pyrolysis treatment by the burner 40 inside the pyrolysis furnace body 10. Finally, the product is discharged through the discharge pipe 50.

[0049] Step 2: By selecting the operation of the circulating pump 32, the water flow inside the water pipe 34 flows from bottom to top. The water flow circulates from top to bottom inside the drive frame 35. The circulating water flow drives the impeller 39 to rotate inside the rotating groove 38. The impeller 39 drives the drive gear 37 to rotate clockwise inside the through groove 36. The clockwise rotating drive gear 37 meshes with the teeth on one side of the transmission rack 311, allowing the drive gear 37 to drive the movable frame 11 to move downward along the drive frame 35. The scraper 13 set on the outer circumference of the movable frame 11 cleans the coking on the inner wall of the pyrolysis furnace body 10.

[0050] Step 3: When cleaning the coking on the inner wall of the pyrolysis furnace body 10, the drive gears 37 inside the two opposing drive frames 35 drive the movable frame 11 to move up and down inside the pyrolysis furnace body 10. At the same time, the inlet pipe 44 introduces refluxed hydrogen into the air blowing frame 12 through the air flow channel 15. The hydrogen generates a gas curtain on one side of the inner wall of the pyrolysis furnace body 10, which isolates the contact between acetylene and the inner wall of the pyrolysis furnace body 10. While the movable frame 11 is driven up and down, circulating coolant is introduced into the cooling flow channel 14 through the water inlet pipe 45 to cool the movable frame 11 and the scraper 13.

[0051] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for improving coking of the inner wall of a pyrolysis furnace for acetylene production, comprising a pyrolysis furnace body (10), wherein a furnace cover (20) is provided on the top of the pyrolysis furnace body (10), and a feed inlet (30) is also provided on the top of the furnace cover (20); a burner (40) is provided at the lower part of the interior of the pyrolysis furnace body (10), and a discharge pipe (50) is also provided at the bottom of the pyrolysis furnace body (10), characterized in that: The pyrolysis furnace body (10) is provided with a scraping mechanism inside, and a reflux component is provided on the outer periphery of the pyrolysis furnace body (10). A drive component is also provided on the outer periphery of the pyrolysis furnace body (10). The scraping mechanism includes a movable frame (11), which is provided inside the pyrolysis furnace body (10). The movable frame (11) is provided at the top and bottom of the movable frame (11), and a number of scrapers (13) are provided on the outer periphery of the movable frame (11). The movable frame (11) is provided with a cooling channel (14) and an air channel (15) is provided inside the movable frame (11). The interior of the air channel (15) is connected to the interior of the two air channels (12). The reflux assembly includes a reflux pipe (21), a booster pump (22) is provided on the outer periphery of the pyrolysis furnace body (10), and a reflux pipe (21) is provided at the top of the booster pump (22). A filter pipe (23) is provided at the bottom of the booster pump (22), and the bottom of the filter pipe (23) is connected to the interior of the discharge pipe (50). The top of the reflux pipe (21) extends into the interior of the pyrolysis furnace body (10). The drive assembly includes a fixed frame (31). The fixed frame (31) is provided on the outer periphery of the pyrolysis furnace body (10), and two circulating pumps (32) are provided inside the fixed frame (31). Guide pipes (33) are provided at the top and bottom of the fixed frame (31), and the two ends of the guide pipes (33) are respectively connected to the ports of the two circulating pumps (32). Water guide pipes (34) are provided at the top and bottom of the fixed frame (31), and one end of the two water guide pipes (34) is respectively connected to the interior of the two guide pipes (33). A drive frame (35) is provided on the inner wall of the pyrolysis furnace body (10), and one end of the water guide pipes (34) is connected to the interior of the drive frame (35). A through groove (36) is provided on the side of the drive frame (35) near the movable frame (11), and several drive gears (37) are rotatably arranged inside the through groove (36). Both sides of the drive frame (35) are provided with A rotating groove (38) is provided, and several impellers (39) are rotatably arranged inside the rotating groove (38). The top end of the water guide pipe (34) is connected to the inside of the rotating groove (38). One end of each of the several impellers (39) is connected to one end of each of the several drive gears (37). Four grooves (310) are provided on the outer peripheral surface of the movable frame (11), and a transmission rack (311) is provided on one side of the inner wall of the groove (310). The surface of the drive gear (37) meshes with one side of the transmission gear (312). Four drive frames (35) are provided inside the pyrolysis furnace body (10), and the four drive frames (35) are distributed at equal angles about the central axis of the pyrolysis furnace body (10). Three water guide pipes (34) are provided on the outer peripheral surface of the pyrolysis furnace body (10), and one end of each of the three water guide pipes (34) is connected to the inside of the three drive frames (35).

2. The structure for improving coking of the inner wall of a pyrolysis furnace for acetylene production according to claim 1, characterized in that: The two ends of the guide pipe (33) are respectively connected to the inlet and outlet of the two circulating pumps (32).

3. The structure for improving coking of the inner wall of a pyrolysis furnace for acetylene production according to claim 2, characterized in that: The top of the return pipe (21) is connected to the interior of another drive frame (35). Both drive frames (35) are provided with a guide groove (41), and a sealing groove (42) is provided on one side of the guide groove (41).

4. The structure for improving coking of the inner wall of a pyrolysis furnace for acetylene production according to claim 3, characterized in that: The top and bottom of the sealing groove (42) are provided with telescopic plates (43), and the outer periphery of the movable frame (11) is also provided with an air inlet pipe (44) and a water inlet pipe (45), and one end of the air inlet pipe (44) and the water inlet pipe (45) are respectively located inside the two grooves (310).

5. The structure for improving coking of the inner wall of a pyrolysis furnace for acetylene production according to claim 4, characterized in that: One end of the air inlet pipe (44) and the water inlet pipe (45) extend into the interior of the two feed troughs (41), and the top and bottom of the air inlet pipe (44) and the water inlet pipe (45) are respectively connected to one side of the two telescopic plates (43).

6. The structure for improving coking of the inner wall of a pyrolysis furnace for acetylene production according to claim 4, characterized in that: Both ends of the water inlet pipe (45) are connected to the interior of the cooling channel (14), and one end of the air inlet pipe (44) is connected to the interior of the air channel (15).

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