Acetylene carbon black preparation furnace cover

Abstract

The utility model belongs to the technical field of acetylene carbon black preparation, and particularly relates to an acetylene carbon black preparation furnace cover which comprises a cover body, an inner pipe and an air blowing pipe, an air inlet is formed in the cover body, and an outer pipe is arranged on the air inlet; the inner pipe comprises a nozzle and a sleeve arranged at one end of the nozzle in a sealed mode, one end of the nozzle is inserted into the outer pipe, a channel of 0.5 mm to 2.0 mm is formed between the nozzle and the outer pipe, a purging opening is formed in one end of the channel and located in the end, away from the sleeve, of the nozzle, and an auxiliary material feeding pipe is arranged on the sleeve and used for adding auxiliary materials. The nozzle is matched and connected with the outer pipe through a sealing piece; one end of the air blowing pipe penetrates through the outer pipe, and the air blowing pipe communicates with the gas phase space of the channel. A scraper scraping mode is replaced by a mode of blowing off coke by introducing inert gas, so that the problems that the service life of a scraper is relatively short under a high-temperature condition and the scraper is difficult to maintain after being damaged and deformed are solved, and meanwhile, auxiliary materials are more convenient to add by adding an auxiliary material feeding hole.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the preparation technical field of acetylene carbon black, especially relates to a preparation furnace cover of acetylene carbon black. BACKGROUND

[0002] Acetylene carbon black is formed by acetylene gas self-thermal cracking under the condition of air isolation, and belongs to thermal cracking method carbon black, which refers to a method that natural gas or acetylene gas is heated in a preheated reaction furnace, and carbon black is generated by intermittent (two stages of combustion heat accumulation and thermal cracking) or continuous (single thermal cracking) thermal cracking under the condition of air isolation.

[0003] Generally, acetylene will form carbon black and coking reaction in the cracking furnace. Under high temperature (927 DEG C), acetylene passes through the condensed ring intermediate to form carbon black and hydrogen; under low 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 method is used to remove coke in the industry at home and abroad, for example, the Chinese utility model patent with publication number CN221005950U discloses a furnace cover device and carbon black cracking reaction furnace, which 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 comprises 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 comprises 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 rotatably clamped on the mounting base, the scraper body is arranged on 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 condition is short, the scraper is difficult to repair after damage and deformation, and it is difficult to increase the auxiliary materials. SUMMARY

[0005] Therefore, it is necessary to provide a preparation furnace cover of acetylene carbon black in view of the problems that the service life of the scraper under high temperature condition is short, the scraper is difficult to repair after damage and deformation, and it is difficult to increase the auxiliary materials.

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

[0007] The utility model provides an acetylene carbon black preparation furnace cover, include: cover, inner tube and blow pipe, be provided with the gas inlet on the cover, be provided with the outer tube on the gas inlet, the inner tube includes the nozzle and the sleeve pipe of sealing arrangement in one end of nozzle, one end of nozzle inserts in the outer tube, and the nozzle and the outer tube form 0.5mm to 2.0mm passageway between, and one end of passageway is provided with the purge port, the purge port is located in one end of nozzle away from the sleeve pipe, be provided with the auxiliary material feeding pipe on the sleeve pipe for adding auxiliary material, the nozzle is connected with the outer tube through sealing piece cooperation, one end of blow pipe penetrates the outer tube, and the blow pipe is communicated with the gas phase space of passageway, for adding inert gas in the passageway.

[0008] Preferably, the passageway includes a guide portion and a guide portion, the guide portion is located below the blow pipe, and is parallel to the outer tube, the guide portion is provided at one end of the guide portion away from the sleeve pipe, and the guide portion and the guide portion form an angle of 100° to 170°.

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

[0010] Preferably, the passageway further includes an inlet portion, the inlet portion is provided above the guide portion, and the gap of the inlet portion is 0.5mm to 5.0mm.

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

[0012] Preferably, the lower flange plate is provided with a groove, the upper flange plate is provided with a protrusion, and the groove and the protrusion are connected.

[0013] Preferably, the groove is provided with a sealing rubber ring.

[0014] Preferably, the cover is provided with a stabilizing frame, and the stabilizing frame is connected with the outer wall of the outer tube.

[0015] Preferably, the cover is further provided with an ignition port, the stabilizing frame is provided with an inclined hole, and an ignition device is arranged between the ignition port and the inclined hole.

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

[0017] The coking is removed by blowing inert gas, instead of scraper, to solve the problem of short service life of scraper under high temperature, and the auxiliary material is more convenient to add through the auxiliary material feeding port. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 A sectional view of a furnace cover for preparing acetylene carbon black is disclosed in the embodiments of the present application.

[0019] Fig. 2 An enlarged view of part A of a furnace cover for preparing acetylene carbon black is disclosed in the embodiments of the present application.

[0020] Fig. 3 A split sectional view of a furnace cover for preparing acetylene carbon black is disclosed in the embodiments of the present application.

[0021] Wherein: cover body 100, outer tube 110, lower flange plate 111, sealing rubber ring 112, stable frame 113, inner tube 200, nozzle 210, upper flange plate 211, sleeve 220, auxiliary material feeding pipe 221, blowing pipe 300, channel 400, air inlet part 410, guide part 420, guide part 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. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[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 similar expressions used herein are only for illustrative purposes 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] Reference Figs. 1 to 3The application provides an acetylene 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, and 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, the sleeve 220 is provided with an auxiliary material feeding pipe 221 for adding auxiliary materials, the nozzle 210 and the outer pipe 110 are connected through a sealing piece, 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 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 sealed and connected to the cracking furnace, the air inlet is arranged at the middle part (the center of the horizontal section) of the cover body 100, 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, 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 the nozzle 210 and the outer pipe 110 are sealingly connected through a sealing piece; 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] The ignition port is arranged at one side of the air inlet, the ignition device is arranged on the ignition port, and the ignition device can be an igniter commonly used in acetylene black preparation; the observation hole can be arranged on the cover body 100 according to needs; the auxiliary material feeding pipe 221 is arranged on the sleeve 220, and the auxiliary material feeding pipe 221 is used for adding auxiliary materials into the cracking furnace.

[0028] Further, the cover body 100 is sealingly arranged on the cracking furnace, the raw materials are introduced into the cracking furnace through the sleeve 220 (the ignition device has been ignited), the inert gas (for example, nitrogen) is introduced into the blowing pipe 300 after the cracking furnace works for a period of time (or is observed through the observation hole), the gas is blown out along the channel 400 and the coking at the air inlet of the cover body 100 is blown off, the introduction of the inert gas is stopped after the coking is blown off, and the preparation process of acetylene 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 conditions is short, and the scraper is difficult to repair after deformation.

[0031] In the above scheme, in order to solve the problem of blowing direction, the channel 400 includes 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 changes the vertically downward gas to the inclined direction of the center of the cover body 100 through the guide portion 430, 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 includes 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 the stress is concentrated along the guide portion 420 into the guide portion 430, 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] The lower flange plate 111 is provided with a groove, and the upper flange plate 211 is provided with a protrusion, and the groove and the protrusion are connected in a matched manner. The groove is provided with a sealing rubber ring 112.

[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 112 in the groove, the lower flange plate 111 and the upper flange plate 211 are connected by bolts, so that the protrusion tightly contacts the sealing rubber ring 112 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 through the gap.

[0038] Based on the above scheme, the cover 100 is further provided with an ignition hole, and the cover 100 is provided with a stable frame 113 connected with the outer wall of the outer tube 110. The stable frame 113 is provided with an inclined hole, and the ignition device is arranged between the inclined hole and the ignition hole.

[0039] The height of the stable frame 113 is half of the height of the outer tube 110, and is located below the blowing pipe 300. The stable frame 113 is provided with an inclined hole, and the inclined hole and the ignition hole on the cover 100 form a 45° angle. By passing the ignition device through the inclined hole and extending into the ignition hole, the ignition end of the ignition device is closer to the air inlet of the cover 100, and the ignition is more convenient. By arranging the stable frame 113, the problem of deformation of the outer tube 110 and the inclined channel 400 caused by shaking of the outer tube 110 due to being too high is solved, and the overall stability is improved.

[0040] The above embodiments only express the device arrangement method of the present application, which is described in detail, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for ordinary skilled persons in the art, some adjustments and improvements can be made without departing from the concept of the present application, which are within the 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 utility model relates to a kind of inert gas injection device, including: Cover, which is provided with air inlet, and outer tube is arranged on the air inlet; Inner tube, which includes nozzle and sleeve arranged at one end of the nozzle, one end of the nozzle is inserted into the outer tube, and 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 purge port, which is located at the end of the nozzle away from the sleeve, and the sleeve is provided with auxiliary material feeding pipe for adding auxiliary materials, and the nozzle and the outer tube are connected by sealing element; And Blowing pipe, one end of which penetrates the outer tube, and the blowing pipe communicates with the gas phase space of the channel for adding inert gas into the channel.

2. The acetylene carbon black production furnace cover according to claim 1, characterized in that The channel includes guide part and guide part, the guide part is located below the blowing pipe, and is parallel to the outer tube; The guide part is provided 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°.

3. The acetylene carbon black production furnace cover according to claim 2, characterized in that The gap between the guide part and the guide part is 0.5mm to 2.0mm.

4. The acetylene carbon black production furnace cover according to claim 3, characterized in that The channel also includes air inlet part, which is arranged above the guide part, and the gap of the air inlet part is 0.5mm to 5.0mm.

5. The acetylene carbon black production furnace cover according to claim 1, characterized in that The sealing element includes upper flange plate and 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 tube away from the cover, and the upper flange plate and the lower flange plate are detachably connected.

6. The acetylene black production furnace cover according to claim 5, characterized in that The lower flange plate is provided with groove, and the upper flange plate is provided with protrusion, and the groove and the protrusion are connected.

7. The acetylene black production furnace cover according to claim 6, characterized in that The groove is provided with sealing rubber ring.

8. The acetylene carbon black production furnace cover according to claim 1, characterized by The cover is provided with stabilizing frame, and the stabilizing frame is connected with the outer wall of the outer tube.

9. The acetylene black production furnace cover according to claim 8, characterized in that The cover is also provided with ignition port, the stabilizing frame is provided with inclined hole, and ignition device is arranged between the inclined hole and the ignition port.

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