Throat pipe structure and carbon black reaction furnace with same

Abstract

The utility model relates to the technical field of carbon black production, in particular to a throat pipe structure which comprises a throat pipe section, a long raw material oil gun and a short raw material oil gun, the front end of the throat pipe section is used for being connected with a combustion section, the rear end of the throat pipe section is used for being connected with a reaction section, and the long raw material oil gun is arranged at the end, close to the combustion section, of the throat pipe section. The nozzle is used for spraying atomized raw oil to the front section of the throat pipe section; the short raw oil gun is arranged at one end, close to the reaction section, of the throat pipe section and is used for spraying atomized raw oil to the rear section of the throat pipe section; according to the utility model, a layered synergistic structure of the long raw material oil gun and the short raw material oil gun is arranged at the throat pipe section, so that carbon black aggregates in the furnace can be in a wider aggregate distribution form, the low hysteresis is improved, and the high-end application requirements of high-performance tires and the like are met; the problem that an existing carbon black reaction furnace is difficult to meet the low-hysteresis requirement in the fields of high-performance tires and the like is solved.

Description

Technical Field

[0001] This utility model relates to the field of carbon black production technology, and in particular to a throat structure and a carbon black reactor having the structure. Background Technology

[0002] In the field of carbon black production, the reactor is the core equipment for preparing hard carbon black, and the arrangement of the raw material oil guns in the throat section is a key factor determining the morphology of carbon black aggregates and the properties of the compound. In existing technologies (such as a hard carbon black reactor with application number CN202120004999.2), the raw material oil guns are usually only set in the rear section of the throat section and close to the reaction section (i.e., short raw material oil guns). This method concentrates the calorific value and has low oil consumption per unit area, and is therefore widely used.

[0003] However, in actual production, the aforementioned throat structure easily leads to the carbon black aggregates in the furnace exhibiting a tightly clustered spherical or short chain structure. This narrow distribution pattern causes the internal friction of the rubber compound to increase during dynamic deformation, significantly increasing rolling resistance and heat generation, resulting in poor low hysteresis performance and making it difficult to meet the low hysteresis requirements of high-performance tires and other fields. Utility Model Content

[0004] In view of this, the present invention proposes a throat structure and a carbon black reactor with the same structure. By setting a layered and coordinated structure of long and short raw material oil guns in the throat section, the carbon black aggregates in the furnace can present a wider aggregate distribution pattern, improve low hysteresis, meet the high-end application requirements such as high-performance tires, and solve the problem that existing carbon black reactors cannot meet the low hysteresis requirements of high-performance tires and other fields.

[0005] The technical solution of this utility model is implemented as follows:

[0006] On the one hand, this utility model provides a throat structure, including a throat segment, and also includes a long raw material oil gun and a short raw material oil gun, wherein,

[0007] The front end of the throat section is used to connect to the combustion section, and the rear end is used to connect to the reaction section. The long feed oil gun and the short feed oil gun are provided on the side wall of the throat section.

[0008] The long raw material oil gun is located at one end of the throat section near the combustion section, and is used to spray atomized raw material oil into the front section of the throat section.

[0009] The short raw material oil gun is located at one end of the throat section near the reaction section and is used to spray atomized raw material oil into the rear section of the throat section.

[0010] Based on the above technical solution, preferably, the rear end of the fluid channel inside the throat section is connected to the reaction section, and the front end is connected to the combustion section, wherein...

[0011] The inner diameter of the first half of the fluid channel increases from back to front, forming a tapered channel;

[0012] The conical channel has a long gun mounting hole on its channel wall, and the long raw material oil gun is inserted into the long gun mounting hole.

[0013] A short gun mounting hole is provided on the channel wall of the rear half of the fluid channel, and the short raw material oil gun is embedded in the short gun mounting hole.

[0014] Based on the above technical solutions, preferably, the long gun mounting hole is parallel to the short gun mounting hole.

[0015] Based on the above technical solutions, preferably, the central axes of the long gun mounting hole and the short gun mounting hole are both perpendicular to and intersect with the central axis of the fluid channel.

[0016] Based on the above technical solution, preferably, both the long gun mounting hole and the short gun mounting hole are provided with a plurality of holes, wherein,

[0017] The long gun mounting holes and the short gun mounting holes are arranged in a fan shape along the circumference of the fluid channel, and the central angle of the fan shape is less than or equal to 180 degrees.

[0018] Based on the above technical solutions, preferably, both ends of the throat section are provided with connecting flanges.

[0019] Based on the above technical solutions, preferably, both the long raw material oil gun and the short raw material oil gun are equipped with atomizing nozzles at their nozzles.

[0020] Based on the above technical solutions, preferably, the spray pattern of the long raw material oil gun and the short raw material oil gun is fan-shaped.

[0021] On the other hand, this utility model also provides a carbon black reactor, including the aforementioned throat structure, and further including a quenching section, wherein...

[0022] The quenching section is located at the rear end of the reaction section.

[0023] Based on the above technical solutions, preferably, a quenching water gun is provided on the side of the quenching section.

[0024] The throat structure and carbon black reactor having the present invention have the following advantages over the prior art:

[0025] (1) By setting long and short raw material oil guns at the front and rear ends of the throat section respectively, the raw material oil is sprayed in layers, forming a pyrolysis environment with different reaction gradients. The long oil gun prolongs the pyrolysis time of the raw material oil in the front section, promoting the formation of primary carbon black particles; the short oil gun quickly initiates the polymerization reaction in the rear section, producing short-chain structures. The synergistic effect of the two broadens the size distribution of carbon black aggregates, significantly reduces the rolling resistance and heat generation of the rubber compound, and meets the low hysteresis requirements of high-performance tires and other fields.

[0026] (2) The conical channel enhances the turbulence intensity at the front of the throat section, increases the furnace temperature, and reduces oil consumption per unit area. At the same time, this structure also reduces local overheating or condensation, preventing coking.

[0027] (3) By setting several long gun mounting holes and several short gun mounting holes arranged in a fan shape along the circumference of the fluid channel, and the central angle of the fan shape is less than or equal to 180 degrees, an asymmetric covering jet field is formed to prevent oil gun collision, suppress local agglomeration, and further optimize the wide distribution characteristics of the aggregate.

[0028] (4) By setting up a quenching section, it is easy to realize the timing control of the entire process of "pyrolysis-polymerization-quenching" in the reactor. By adjusting the timing of quenching water injection, the content of functional groups on the surface of carbon black can be flexibly changed to meet the reinforcement performance requirements of different application scenarios. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a carbon black reactor according to the present invention;

[0031] Figure 2 This is a schematic diagram of the longitudinal section structure of the throat segment of this utility model;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of the throat segment of this utility model;

[0033] In the diagram: 1. Combustion section; 2. Throat section; 3. Reaction section; 4. Quenching section; 21. Long feed oil gun; 22. Short feed oil gun; 41. Quenching water gun; 201. Fluid channel; 202. Long gun mounting hole; 203. Short gun mounting hole; 204. Connecting flange. Detailed Implementation

[0034] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] like Figure 1-3 As shown, a throat structure of this utility model includes a throat section 2, a long raw material oil gun 21, and a short raw material oil gun 22.

[0036] The front end of the throat section 2 is used to connect to the combustion section 1, and the rear end is used to connect to the reaction section 3. The side wall of the throat section 2 is provided with a long raw material oil gun 21 and a short raw material oil gun 22. The long raw material oil gun 21 is located at the end of the throat section 2 near the combustion section 1 and is used to spray atomized raw material oil into the front section of the throat section 2. The short raw material oil gun 22 is located at the end of the throat section 2 near the reaction section 3 and is used to spray atomized raw material oil into the rear section of the throat section 2.

[0037] By setting long feed oil guns 21 and short feed oil guns 22 at both ends of the throat section 2, layered injection of feed oil is achieved. The long feed oil gun 21 is located near the combustion section 1, where the injected feed oil generates fine primary particles. The short feed oil gun 22 is located near the reaction section 3, where the injected feed oil rapidly initiates a polymerization reaction, forming short chains. This layered synergistic pyrolysis technology significantly broadens the size distribution of carbon black aggregates, reduces rolling resistance and heat generation in rubber compounds, and effectively solves the problems of narrow aggregate distribution and high hysteresis in existing technologies, meeting the low hysteresis requirements of high-performance tires.

[0038] In the aforementioned throat structure, the rear end of the fluid channel 201 inside the throat segment 2 is connected to the reaction section 3, and the front end is connected to the combustion section 1, wherein, as Figure 1 As shown, the inner diameter of the first half of the fluid channel 201 increases from back to front to form a tapered channel; a long gun mounting hole 202 is provided on the channel wall of the tapered channel, and a long raw material oil gun 21 is inserted into the long gun mounting hole 202; a short gun mounting hole 203 is provided on the channel wall of the second half of the fluid channel 201, and a short raw material oil gun 22 is inserted into the short gun mounting hole 203.

[0039] The conical channel enhances the intensity of airflow turbulence. The turbulent field improves the mixing efficiency of high-temperature fuel gas and feedstock oil atomized particles, reducing feedstock oil consumption by 10%-15%. Simultaneously, this structure ensures directional injection of feedstock oil within a gradient temperature field, reducing localized overheating or condensation, preventing coking, and improving the stability of carbon black quality.

[0040] Furthermore, the long gun mounting hole 202 is parallel to the short gun mounting hole 203, avoiding mutual interference between the jet flow fields and ensuring that the radial distribution uniformity of the feedstock oil in the throat section 2 is improved by more than 30%. This structural optimization suppresses local agglomeration, further expands the aggregate size distribution, improves the reinforcing properties of carbon black and the dynamic deformation uniformity of the rubber compound, enhances the dispersibility of carbon black in the rubber compound, and reduces the rolling resistance of the tire.

[0041] Furthermore, the central axes of both the long gun mounting hole 202 and the short gun mounting hole 203 are perpendicular to and intersect with the central axis of the fluid channel 201, allowing the feedstock oil to be injected vertically into the center region of the airflow, enhancing the mixing efficiency of atomized particles and high-temperature flue gas. This structure maximizes the utilization of the kinetic and thermal energy of the combustion section 1, promoting rapid cracking and uniform nucleation of the feedstock oil, further expanding the aggregate size distribution, reducing the hysteresis of the rubber compound, and simultaneously reducing the residue of unreacted feedstock oil, thereby increasing the yield.

[0042] In the aforementioned throat structure, both the long gun mounting hole 202 and the short gun mounting hole 203 are provided in multiples, such as 4 to 12 for each. The number of long gun mounting holes 202 and short gun mounting holes 203 are the same, and they are used simultaneously. Figure 3 As shown, several long gun mounting holes 202 and several short gun mounting holes 203 are arranged in a fan shape along the circumference of the fluid channel 201, and the central angle of the fan shape is less than or equal to 180 degrees. Through this structure, an asymmetric covering jet field is formed, which prevents the collision of similar oil guns (i.e., jet interference), suppresses local agglomeration, and further optimizes the wide distribution characteristics of the aggregate.

[0043] Furthermore, both the long raw material oil gun 21 and the short raw material oil gun 22 are equipped with atomizing nozzles at their nozzles, and the spray pattern of the long raw material oil gun 21 and the short raw material oil gun 22 is fan-shaped, that is, the raw material oil sprayed from the atomizing nozzles is fan-shaped. Through the thorough mixing of the atomized particles distributed in this fan shape with the high-temperature airflow, the nucleation and growth process of the aggregates can be controlled in a gradient temperature field, forming spherical or chain-like structures, further reducing the rolling resistance and heat generation of the rubber compound, and meeting the dynamic performance requirements of high-performance tires.

[0044] In the aforementioned throat structure, both ends of the throat section 2 are equipped with connecting flanges 204, facilitating quick assembly, disassembly, and sealing of the throat section 2 with the combustion section 1 and the reaction section 3. Simultaneously, the modular design of the flanges reduces the risk of leakage at the connections, avoids fluctuations in the temperature and flow fields, maintains the stable operation of the layered spraying structure, and ensures a wide distribution morphology of the carbon black aggregates.

[0045] The above-mentioned throat structure is applied to Figure 1The carbon black reactor shown includes a quenching section 4, which is located at the rear end of the reaction section 3. By integrating the quenching section 4, the carbon black growth reaction is rapidly terminated at the rear end of the reaction section 3, preventing excessive agglomeration. Through timing control of the quenching section 4 (quenching completed within 0.5-2 seconds), the reaction time window can be precisely adjusted, optimizing the surface activity of the carbon black (such as the distribution of oxygen-containing functional groups), improving its interfacial bonding with the rubber matrix, reducing dynamic heat generation, and meeting the requirements of high-performance tires for low hysteresis and high wear resistance.

[0046] In addition, the cooling medium in the quenching section 4 is cooling water. Therefore, a quenching water gun 41 is provided on the side of the quenching section 4 to inject quenching water into the quenching section 4, thereby quenching and cooling down the temperature and terminating the reaction.

[0047] The principle of carbon black production using a carbon black reactor according to this utility model is as follows:

[0048] Combustion section 1 provides the necessary calorific value for carbon black pyrolysis. After calorific value accumulation, the long feed oil gun 21 on the throat section 2 is responsible for the initial pyrolysis of the feed oil to generate primary particles, while the short feed oil gun 22 is used to promote carbon chain polymerization to form broadly distributed aggregates. Subsequently, the feed oil enters reaction section 3, where it further aggregates into chain or branched structures. Finally, it is rapidly cooled in quench section 4 to terminate the reaction while retaining surface-active groups, producing a low-hysteresis carbon black product.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A throat structure, comprising a throat segment (2), characterized in that: It also includes a long feedstock nozzle (21) and a short feedstock nozzle (22), among which, The front end of the throat section (2) is used to connect to the combustion section (1), and the rear end is used to connect to the reaction section (3). The long feed oil gun (21) and the short feed oil gun (22) are provided on the side wall of the throat section (2). The long raw material oil gun (21) is located at one end of the throat section (2) near the combustion section (1) and is used to spray atomized raw material oil into the front section of the throat section (2); The short raw material oil gun (22) is located at one end of the throat section (2) near the reaction section (3) and is used to spray atomized raw material oil into the rear section of the throat section (2).

2. The throat structure as described in claim 1, characterized in that: The fluid channel (201) inside the throat section (2) is connected at its rear end to the reaction section (3) and at its front end to the combustion section (1), wherein, The inner diameter of the front half of the fluid channel (201) increases from back to front to form a tapered channel; The conical channel has a long gun mounting hole (202) on its channel wall, and the long raw material oil gun (21) is embedded in the long gun mounting hole (202); A short gun mounting hole (203) is provided on the channel wall of the rear half of the fluid channel (201), and the short raw material oil gun (22) is embedded in the short gun mounting hole (203).

3. The throat structure as described in claim 2, characterized in that: The long gun mounting hole (202) is parallel to the short gun mounting hole (203).

4. The throat structure as described in claim 2, characterized in that: The central axes of the long gun mounting hole (202) and the short gun mounting hole (203) are both perpendicular to and intersect with the central axis of the fluid channel (201).

5. A throat structure as described in claim 2, characterized in that: Both the long gun mounting hole (202) and the short gun mounting hole (203) are provided with a plurality of holes, wherein, The long gun mounting holes (202) and the short gun mounting holes (203) are arranged in a fan shape along the circumference of the fluid channel (201), and the central angle of the fan shape is less than or equal to 180 degrees.

6. The throat structure as described in claim 1, characterized in that: Both ends of the throat section (2) are provided with connecting flanges (204).

7. A throat structure as described in claim 1, characterized in that: Both the long raw material oil gun (21) and the short raw material oil gun (22) are equipped with atomizing nozzles at their muzzles.

8. The throat structure as described in claim 1, characterized in that: The spray pattern of the long raw material oil gun (21) and the short raw material oil gun (22) is fan-shaped.

9. A carbon black reaction furnace, characterized in that: Including the tracheal structure as described in any one of claims 1 to 8, it further includes a quenching segment (4), wherein, The quenching section (4) is located at the rear end of the reaction section (3).

10. A carbon black reactor as described in claim 9, characterized in that: A quenching water gun (41) is provided on the side of the quenching section (4).

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