Acetylene carbon black preparation furnace cover, cracking furnace and preparation system

Abstract

The application belongs to the technical field of acetylene black preparation, and particularly relates to an acetylene black preparation furnace cover, a cracking furnace and a preparation system, which comprise a cover body, an inner pipe and a blowing pipe. An air inlet is arranged on the cover body, and an outer pipe is arranged on the air inlet. The inner pipe comprises a nozzle and a sleeve pipe which is sealingly arranged at one end of the nozzle. The other end of the nozzle is inserted into the outer pipe, a channel with a width of 0.5mm to 2.0mm is formed between the nozzle and the outer pipe, one end of the channel is provided with a blowing port, the blowing port is located at the end of the nozzle away from the sleeve pipe, and the nozzle and the outer pipe are connected through a sealing element. One end of the blowing pipe penetrates through the outer pipe, and the blowing pipe is in communication with a gas phase space of the channel. The coking is blown off by blowing in inert gas, so that the service life of the scraper under high temperature is prolonged, and the problem that the scraper is difficult to repair after being damaged and deformed is solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of acetylene carbon black preparation, and particularly relates to an acetylene carbon black preparation furnace cover, a cracking furnace and a preparation system. BACKGROUND

[0002] Acetylene carbon black is formed by self-heating cracking of acetylene gas under air isolation conditions, and belongs to thermal cracking carbon black. Thermal cracking carbon black refers to a method of generating carbon black by intermittently (two stages of combustion heat accumulation and thermal cracking) or continuously (single thermal cracking) thermal cracking of natural gas or acetylene gas in a preheated reaction furnace under air isolation conditions.

[0003] Generally, acetylene will undergo carbon black formation reaction and coking reaction in the cracking furnace. Generally, at a higher temperature (>927 DEG C), acetylene passes through a condensed ring intermediate to form carbon black and hydrogen; at a lower temperature (<927 DEG C), acetylene passes through condensation to form coke; the inner tube of the cracking furnace is the most prone to coke formation; at present, physical scraping has been used to remove coke in the industry at home and abroad, for example, the Chinese utility model patent with the publication number CN221005950U discloses a furnace cover device and a carbon black cracking reaction furnace, specifically discloses that the furnace cover body is arranged on the carbon black cracking reaction furnace; the inner tube is arranged in the middle of the furnace cover body; the scraper part is arranged on the side of the inner tube, and the scraper part includes a scraper body and a sealing swing assembly, the sealing swing assembly is sleeved on the scraper body to seal the scraper body and the furnace cover body; the sealing swing assembly includes a mounting base, a sleeve and a bearing, the sealing swing assembly is arranged on the furnace cover body through the mounting base, the sleeve is rotationally clamped on the mounting base, the scraper body is arranged in the sleeve, the bearing is sleeved on the sleeve, and the scraper body can rotate relative to the mounting base through the sleeve and the bearing, and part of the scraper body can swing relative to the inner tube to scrape the coke on the inner tube. The furnace cover device can ensure the sealing of the scraper body during swinging, ensure that the carbon black cracking reaction furnace is always in an oxygen isolation environment, and ensure the quality of the product.

[0004] However, the service life of the scraper under high temperature conditions is short, and the scraper is difficult to repair after damage and deformation. SUMMARY

[0005] Therefore, it is necessary to provide an acetylene carbon black preparation furnace cover, a cracking furnace and a preparation system in view of the short service life of the scraper under high temperature conditions and the difficulty in repairing the scraper after damage and deformation.

[0006] To achieve the above-mentioned purpose, the application adopts the following scheme:

[0007] An acetylene carbon black preparation furnace cover comprises a cover body, an inner tube and a blowing tube, the cover body is provided with an air inlet, and the air inlet is provided with an outer tube; the inner tube comprises a nozzle and a sleeve pipe sealingly arranged at one end of the nozzle, the other end of the nozzle is inserted into the outer tube, a channel of 0.5mm to 2.0mm is formed between the nozzle and the outer tube, one end of the channel is provided with a blowing port, the blowing port is located at the end of the nozzle away from the sleeve pipe, and the nozzle and the outer tube are connected through a sealing piece; one end of the blowing tube penetrates through the outer tube, and the blowing tube is in communication with the gas phase space of the channel for adding inert gas into the channel.

[0008] Preferably, the channel comprises a guide part and a guide part, the guide part is located below the blowing tube and is parallel to the outer tube; the guide part is provided at the end of the guide part away from the sleeve pipe, and the guide part and the guide part form an angle of 100° to 170°.

[0009] Preferably, the gap between the guide part and the guide part is 0.5mm to 2.0mm.

[0010] Preferably, the channel further comprises an air inlet part, the air inlet part is arranged above the guide part, and the gap of the air inlet part is 0.5mm to 5.0mm.

[0011] Preferably, the sealing piece comprises an upper flange plate and a lower flange plate, the upper flange plate is arranged at the end of the nozzle close to the sleeve pipe, the lower flange plate is arranged at the end of the outer tube away from the cover body, and the upper flange plate and the lower flange plate are detachably sealingly connected.

[0012] Preferably, a sealing rubber ring is arranged between the lower flange plate and the upper flange plate.

[0013] Preferably, a stabilizing frame is arranged on the cover body, and the stabilizing frame is connected with the outer wall of the outer tube.

[0014] An acetylene carbon black cracking furnace comprises the acetylene carbon black preparation furnace cover.

[0015] An acetylene carbon black preparation system comprises the acetylene carbon black cracking furnace.

[0016] The technical scheme adopted in the application can achieve the following beneficial effects:

[0017] By replacing the scraper removal method with the inert gas blowing method, the problem of short service life of the scraper under high temperature conditions and difficult maintenance after the scraper is damaged and deformed is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1A sectional view of an acetylene carbon black preparation furnace cover disclosed by the embodiments of the present application.

[0019] Fig. 2 An enlarged view of part A of an acetylene carbon black preparation furnace cover disclosed by the embodiments of the present application.

[0020] Fig. 3 A split sectional view of an acetylene carbon black preparation furnace cover disclosed by the embodiments of the present application.

[0021] Wherein: cover body 100, outer tube 110, lower flange plate 111, stabilizing frame 113, inner tube 200, nozzle 210, upper flange plate 211, sleeve 220, gas blowing pipe 300, channel 400, gas inlet portion 410, guide portion 420, guide portion 430. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present application can be more thoroughly and completely understood.

[0023] It should be noted that when a device is considered to be "connected" to another device, it can be directly connected to the other device or a mediating device can be present at the same time. The terms "internal", "top", "upper", "lower", "up", "down" and the like used herein are only for the purpose of illustration and do not represent the only embodiment.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] Referring to Figs. 1 to 3The application provides an acetylene carbon black preparation furnace cover, which comprises a cover body 100, an inner pipe 200 and a blowing pipe 300, the cover body 100 is provided with an air inlet, and the air inlet is provided with an outer pipe 110; the inner pipe 200 comprises a nozzle 210 and a sleeve 220 which is sealingly arranged at one end of the nozzle 210, one end of the nozzle 210 is inserted into the outer pipe 110, a channel 400 with a size of 0.5mm to 2.0mm is formed between the nozzle 210 and the outer pipe 110, one end of the channel 400 is provided with a blowing port, the blowing port is located at the end of the nozzle 210 away from the sleeve 220, and the nozzle 210 and the outer pipe 110 are connected through a sealing element; and one end of the blowing pipe 300 penetrates through the outer pipe 110, and the blowing pipe 300 is in communication with the gas phase space of the channel 400, and is used for adding inert gas into the channel 400.

[0026] Specifically, the lower end surface of the cover body 100 is provided with a clamping groove, a thread or the like which can be disassembled, and can be sealingly connected to the cracking furnace, the middle part (the center of the horizontal section) of the cover body 100 is provided with an air inlet, the outer wall of one end of the outer pipe 110 is fixedly and sealingly connected to the air inlet of the cover body 100, and the one end of the outer pipe 110 is flush with the lower end surface of the cover body 100; the nozzle 210 and the sleeve 220 are sealingly connected, the nozzle 210 is a straight pipe, and the sleeve 220 is a bent pipe, the end of the nozzle 210 away from the sleeve 220 extends into the inner wall of the outer pipe 110 and is flush with the end of the outer pipe 110 close to the cover body 100, and a sealing element is used to sealingly connect the nozzle 210 and the outer pipe 110; a through hole with a size of 0.5mm to 2mm (the inner diameter of the outer pipe 110 is slightly larger than the outer diameter of the nozzle 210) is formed between the nozzle 210 and the outer pipe 110, and the through hole with a size of 2mm is preferably selected; the blowing pipe 300 is perpendicular to the outer pipe 110, and one end of the blowing pipe 300 penetrates through the outer pipe 110 and is in communication with the gas phase space of the through hole.

[0027] An ignition port is arranged on the cover body 100, the ignition port is located on one side of the air inlet, and an ignition device is arranged, and the ignition device can be an igniter commonly used in acetylene carbon black preparation; an observation hole can be arranged on the cover body 100 according to needs; an auxiliary material feeding pipe is arranged on the sleeve 220, and the auxiliary material feeding pipe is used for adding auxiliary materials into the cracking furnace.

[0028] Further, the cover body 100 is sealingly arranged on the cracking furnace, raw materials are fed into the cracking furnace through the sleeve 220 (the ignition device has been ignited), after the cracking furnace works for a period of time (or is observed through the observation hole), inert gas (for example, nitrogen) is fed into the blowing pipe 300, the gas is blown out downward along the channel 400 and blows off the coking at the air inlet of the cover body 100, after the coking is blown off, the feeding of the inert gas is stopped, and the preparation process of acetylene carbon black is continued.

[0029] The technical scheme that the application adopts an acetylene carbon black preparation furnace cover can achieve the following beneficial effects:

[0030] By replacing the scraper removal mode with the mode of blowing off the coking by blowing in inert gas, the service life of the scraper under high temperature is short, and the scraper is difficult to repair after deformation.

[0031] In the above scheme, in order to solve the problem of the blowing direction, the channel 400 comprises a guide portion 420 and a guide portion 430, the guide portion 420 is located below the blowing pipe 300 and is parallel to the outer pipe 110, and the guide portion 430 is arranged at one end of the guide portion 420 away from the sleeve pipe 220, and the guide portion 430 and the guide portion 420 form an included angle of 100° to 170°.

[0032] Specifically, the channel 400 extends from the highest part of the blowing pipe 300 to the end of the outer pipe 110 close to the cover body 100, the guide portion 420 is a straight line portion and is parallel to the outer wall of the outer pipe 110, the inclined extension direction of the guide portion 430 and the extension direction of the guide portion 420 form an included angle of 100° to 170°, preferably 105°, the inert gas enters the guide portion 420, and then the guide portion 430 changes the vertically downward gas into the obliquely outward gas to the center direction of the cover body 100, so that the blowing flow rate of the inert gas is larger, and the stress is inwardly converged, thereby solving the problem of difficult coking blowing off.

[0033] Based on the above scheme, in order to solve the problem of slow gas flow rate, the gap between the guide portion 420 and the guide portion 430 is 0.5mm to 2.0mm. The channel 400 further comprises an air inlet portion 410, the air inlet portion 410 is arranged above the guide portion 420, and the gap of the air inlet portion 410 is 0.5mm to 5.0mm.

[0034] The air inlet portion 410 is arranged at the blowing pipe 300, and the distance between the nozzle 210 and the outer pipe 110 at the air inlet portion 410 is greater than the distance between the nozzle 210 and the outer pipe 110 at the guide portion 420, and the preferred scheme is that the distance between the nozzle 210 and the outer pipe 110 at the air inlet portion 410 is 5mm, and the distance between the nozzle 210 and the outer pipe 110 at the guide portion 420 is 2mm, and the air inlet portion 410 and the guide portion 420 are connected into a whole through a smooth circular arc, when the inert gas enters the air inlet portion 410, the air inlet portion 410 is full of gas, and the gas phase space of the guide portion 420 is reduced, so that the flow rate of the inert gas is accelerated for the first time, and then the inert gas changes the direction for the second time and is accelerated and stressed, thereby solving the problem of slow gas loss, and the coking at the air inlet of the cover body 100 cannot be blown off.

[0035] In another embodiment of the present application, in order to improve the sealing of the nozzle 210 and the outer tube 110, the sealing member comprises an upper flange plate 211 and a lower flange plate 111, the upper flange plate 211 is arranged at one end of the nozzle 210 close to the sleeve 220, the lower flange plate 111 is arranged at one end of the outer tube 110 away from the cover 100, and the upper flange plate 211 and the lower flange plate 111 are detachably connected in a sealed manner.

[0036] Further, a sealing rubber ring is arranged between the lower flange plate 111 and the upper flange plate 211.

[0037] By arranging a groove on the upper end surface of the lower flange plate 111 and a protrusion on the upper flange plate 211, and placing the sealing rubber ring in the groove, the lower flange plate 111 and the upper flange plate 211 are connected by bolts, so that the protrusion tightly fits the sealing rubber ring in the groove, thereby increasing the sealing effect and solving the problem of low efficiency of preparing acetylene carbon black caused by the entry of external gas into the cracking furnace.

[0038] Based on the above scheme, the cover 100 is provided with a stabilizing frame 113 connected with the outer wall of the outer tube 110. The height of the stabilizing frame 113 is half of the height of the outer tube 110, and is located below the blowing pipe 300. An inclined hole is arranged on the stabilizing frame 113, and the inclined hole and the ignition opening on the cover 100 form an angle of 45°. By passing the ignition device through the inclined hole and into the ignition opening, the ignition end of the ignition device is closer to the air inlet of the cover 100, and ignition is more convenient. By arranging the stabilizing frame 113, the problem of deformation of the inclined channel 400 of the outer tube 110 caused by shaking of the outer tube 110 due to being too high is solved, and the overall stability is improved.

[0039] An acetylene carbon black cracking furnace comprises the acetylene carbon black preparation furnace cover.

[0040] By arranging the acetylene carbon black preparation furnace cover on the cracking furnace, inert gas enters the channel 400 from the blowing pipe 300, is temporarily stored in the air inlet part 410 of the channel 400, and enters the guide part 420. The gas passes through the guide part 420 with a smaller space, so that the flow rate of the gas increases. The gas enters the direction-changing guide part 430 from the guide part 420, and is blown out toward the center of the cover 100 through the guide part 430, thereby increasing the blowing stress and accelerating the falling of the coking.

[0041] An acetylene carbon black preparation system comprises the acetylene carbon black cracking furnace.

[0042] The above-described embodiments only express the device arrangement manner of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent application scope; it should be pointed out that for ordinary skilled in the art, under the premise of not departing from the concept of the present application, a number of adjustments and improvements can be made, which belong to the protection scope of the present application; therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. An acetylene carbon black production furnace cover, characterized by, The cover is provided with an air inlet, and the air inlet is provided with an outer pipe. The inner pipe includes a nozzle and a sleeve sealingly arranged at one end of the nozzle, the other end of the nozzle is inserted into the outer pipe, and a channel of 0.5mm to 2.0mm is formed between the nozzle and the outer pipe, one end of the channel is provided with a purge port, the purge port is located at the end of the nozzle away from the sleeve, and the nozzle and the outer pipe are connected through a sealing piece; and The blowing pipe is inserted into the outer pipe at one end, and the blowing pipe communicates with the gas phase space of the channel for adding inert gas into the channel. The channel includes a guide part and a guide part, the guide part is located below the blowing pipe and parallel to the outer pipe, and the guide part is located at the end of the guide part away from the sleeve, and the guide part and the guide part form an angle of 100° to 170°; The gap between the guide part and the guide part is 0.5mm to 2.0mm; The channel also includes an air inlet part, the air inlet part is arranged above the guide part, and the gap of the air inlet part is 0.5mm to 5.0mm; The sealing piece includes an upper flange plate and a lower flange plate, the upper flange plate is arranged at the end of the nozzle close to the sleeve, the lower flange plate is arranged at the end of the outer pipe away from the cover, and the upper flange plate and the lower flange plate are detachably sealed and connected; A sealing rubber ring is arranged between the lower flange plate and the upper flange plate. The cover is provided with a stable frame, and the stable frame is connected with the outer wall of the outer pipe.

2. The acetylene carbon black production furnace cover according to claim 1, characterized in that The cover includes the cover of any one of claims 1-2.

3. An acetylene carbon black cracking furnace characterized by, The cover includes the cover of claim 3.

4. An acetylene carbon black production system characterized by, ​

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