An oil furnace method carbon black production device, method and product

Abstract

The present application relates to the technical field of carbon black, and particularly relates to an oil furnace method carbon black production device, method and product, the device comprising a front section furnace body, a rear section furnace body, a connecting piece and a modularized ladder section, wherein the front section furnace body has a combustion section and a throat section in sequence from front to back; the rear section furnace body has a reaction straight cylinder section and a quenching section in sequence from front to back; the connecting piece connects the front section furnace body and the rear section furnace body, and an installation area is formed between the front section furnace body and the rear section furnace body; the modularized ladder section is detachably arranged in the installation area to constitute a complete furnace body, and an inner cavity of the modularized ladder section is a ladder-shaped cavity. The present application proposes an oil furnace method carbon black production device, method and product, aiming to solve the technical problem that the existing oil furnace method carbon black production device is difficult to improve the structure value of carbon black due to short reaction time, insufficient collision kinetic energy and too short residence time.

Description

Technical Field

[0001] This invention relates to the field of carbon black technology, and in particular to an apparatus, method and product for producing carbon black using an oil furnace method. Background Technology

[0002] With the rise of new energy vehicles and the energy storage industry, higher demands are being placed on carbon black for battery conductive agents and anode materials. Currently, conductive agents for the positive and negative electrodes of lithium / sodium batteries not only need good conductivity but also easy dispersibility and processing. While carbon nanotubes have better conductivity than conductive carbon black, their morphology makes them difficult to disperse, typically requiring the addition of dispersants to form a premixed slurry. Conductive carbon black, on the other hand, can be used directly. Therefore, high-structure conductive carbon black has broad application prospects.

[0003] However, existing oil furnace carbon black production processes have limitations in the morphology of carbon black formation, and the structure value cannot be further improved. Currently, the oil absorption value (DBP) of carbon black is difficult to exceed 150×10⁻⁶. -5 m 3 / kg. The existing design philosophy of hard oil furnace carbon black reactors is to retain the chemical energy of the original particle surface and increase reinforcing capacity, thus resulting in a short reaction time (approximately 10...). -6 (within seconds). When attempting to increase the structure value, it is found that the collision kinetic energy is insufficient and the residence time is too short to achieve the goal of increasing the structure value through collision and consuming the reaction to increase the graphitization lattice morphology. Summary of the Invention

[0004] In view of this, the present invention proposes an oil furnace carbon black production apparatus, method and product, aiming to solve the technical problem that the carbon black structure value is difficult to improve due to short reaction time, insufficient collision kinetic energy and too short residence time in existing oil furnace carbon black production apparatus.

[0005] The technical solution of this invention is implemented as follows: On one hand, the present invention provides an oil furnace carbon black production apparatus, comprising a front furnace body, a rear furnace body, connecting parts, and a modular stepped section, wherein, The front section of the furnace body has a combustion section and a throat section that are interconnected from front to back. The rear section of the furnace body has, from front to back, an interconnected reaction cylinder section and a quenching section; The connector connects the front furnace body and the rear furnace body, and an installation area is formed between the front furnace body and the rear furnace body; The modular stepped section is detachably installed in the installation area to form a complete furnace body. The inner cavity of the modular stepped section is a stepped cavity, and the throat section and the reaction cylinder section are connected through the stepped cavity.

[0006] Based on the above technical solutions, preferably, the combustion section is provided with an oxygen-enriched air inlet, and the throat section is provided with a raw material oil gun.

[0007] Based on the above technical solutions, preferably, a rapid cooling constriction section is provided between the reaction cylinder section and the rapid cooling section, and the ratio of the diameter of the reaction cylinder section to the diameter of the rear end port of the throat section is 5:1-7:1.

[0008] Based on the above technical solutions, preferably, the modular stepped section includes multiple sector-shaped refractory blocks, multiple sector-shaped heat insulation blocks, and multiple sector-shaped rigid blocks, wherein, Multiple refractory blocks are spliced ​​and fixed end to end along the circumference of the furnace body to form a first cylindrical structure; Multiple heat insulation blocks are spliced ​​and fixed end to end along the circumference of the furnace body to form a second cylindrical structure, and the second cylindrical structure is wrapped around the outer periphery of the first cylindrical structure; Multiple rigid blocks are spliced ​​and fixed end to end along the circumference of the furnace body to form a third cylindrical structure, which wraps around the outer periphery of the second cylindrical structure; The inner ring surface of the first cylindrical structure is provided with stepped steps along the axial direction to form the stepped cavity.

[0009] Based on the above technical solutions, preferably, the refractory block comprises multiple sub-modules, wherein, Multiple sets of the aforementioned sub-modules are stacked sequentially along the furnace body axis; The radial width of the multiple sets of sub-modules decreases from front to back along the axial direction of the furnace body.

[0010] Based on the above technical solutions, preferably, each group of sub-modules includes multiple sector blocks of the same thickness.

[0011] Based on the above technical solutions, preferably, the connecting component includes a round rod and two flanges, wherein, The round rod is fixed between the two flanges, and two round rods are arranged in parallel. Both the rear end of the front furnace body and the front end of the rear furnace body are provided with sinkers, and the flange is fixed in the sinker on the corresponding side.

[0012] Based on the above technical solution, preferably, a U-shaped groove is provided on the inner ring surface of the rigid block at the position corresponding to the round rod, wherein, The round rod slides into the corresponding U-shaped groove.

[0013] On the other hand, the present invention also provides a method for producing carbon black using the above-described apparatus, comprising the following steps: S1. Introduce oxygen-enriched air into the combustion section, with an oxygen enrichment ratio of 1%-3%; S2. Inject the raw material oil through the throat section and control the ratio of raw material oil to air to increase synchronously with the oxygen enrichment ratio. S3. The reaction stream passes through the modular stepped section, and the stepped cavity extends the reaction residence time to a level sufficient for the carbon black particles to collide fully and form high-structure aggregates. S4. After rapid cooling in the aforementioned rapid cooling section, carbon black product is obtained.

[0014] Furthermore, the present invention also provides a carbon black product prepared by the above method.

[0015] The oil furnace carbon black production apparatus, method, and product of the present invention have the following advantages over the prior art: (1) By setting the furnace body into a front furnace body and a rear furnace body connected by connectors, and forming an installation area between the two, a modular stepped section with a stepped inner cavity is detachably set in the installation area. The stepped cavity effectively extends the reaction residence time, increases the eddy current of the flow field, and increases the collision probability of carbon black particles, thereby significantly improving the structural value and conductivity of carbon black. At the same time, the modular stepped section facilitates later maintenance, and the modules can be replaced according to process requirements, realizing multiple uses of one machine and improving the versatility of the equipment.

[0016] (2) By setting multiple sets of sub-modules with axial superposition and radial width reduction, and each set of sub-modules includes multiple fan-shaped blocks of the same thickness, the step size of each level of the stepped cavity can be flexibly adjusted. By replacing fan-shaped blocks with different radial widths or changing the number of fan-shaped blocks, the expansion ratio and step length can be continuously adjusted to meet different product requirements and further improve the versatility of the equipment.

[0017] (3) Through the sliding fit between the round rod of the connector and the U-shaped groove of the rigid block, the round rod plays a guiding and positioning role when installing the rigid block, which can greatly reduce the installation difficulty and assembly error, and ensure that the stepped cavity and the front and rear furnace bodies maintain good coaxiality.

[0018] (4) By setting up an oxygen-enriched air inlet, it is easy to control the excessive oxygen entering the reaction section. The incomplete combustion of excess oxygen can increase the heat energy, thereby effectively affecting the collision probability of primary carbon black particles and promoting the formation of high-structure aggregates.

[0019] (5) By adding a raw material oil gun, primary particles with a wider radial distribution can be generated first. After passing through the reaction section, these primary particles form carbon black aggregates with a wider distribution, thereby effectively improving the structural value of carbon black.

[0020] (6) By limiting the ratio of the diameter of the reaction cylinder section to the diameter of the throat section's rear end port to 5:1-7:1, the diameter and length of the reaction section are effectively enlarged, the reaction residence time is greatly increased, and the carbon black particles are given more opportunities for collision and structural growth, thereby achieving a significant improvement in the structural value.

[0021] (7) By setting a quenching constriction section between the reaction straight section and the quenching section, it is convenient to increase the spray coverage of quenching water through the constriction structure, so as to ensure that the high temperature flue gas can be cooled quickly and evenly, thereby locking the shape of the high structure aggregate and avoiding structural collapse.

[0022] (8) By introducing oxygen-enriched air at a ratio of 1%-3% into the combustion section and simultaneously increasing the ratio of raw oil to air when injecting raw oil, the excess oxygen content in the reaction system increases, generating more incomplete combustion heat and consuming reaction energy. This promotes the collision and dehydrogenation of carbon black particles to improve the structural value, and also forms pores on the carbon black surface through the etching effect, thereby improving its conductivity. At the same time, the residence time of the reaction stream is significantly extended when passing through the stepped cavity, allowing the carbon black particles to fully collide and form high-structure aggregates. Finally, the aggregates are rapidly cooled and shaped in the quenching section, thus producing high-structure conductive carbon black efficiently and stably.

[0023] (9) By setting the design benchmark of the reactor oil source to use catalytic oil slurry with low solid content after desolidification, the purity of conductive carbon black can be effectively improved. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of an existing oil furnace carbon black production plant. Figure 2 This is a schematic diagram of the structure of an oil furnace carbon black production apparatus according to the present invention; Figure 3 This is a partial 3D view of the installation area; Figure 4 This is a partial 3D view of the modular stepped section; Figure 5 for Figure 4 Enlarged view of point A; Figure 6 This is a partial exploded view of the modular stepped section; Figure 7 for Figure 6 A schematic diagram of the local structure from another perspective; Figure 8 This is a 3D view of the sector block; In the diagram: 1. Front furnace body; 2. Rear furnace body; 3. Connecting parts; 4. Modular stepped section; 11. Combustion section; 12. Throat section; 13. Raw material oil gun; 21. Reaction cylinder section; 22. Quenching section; 23. Quenching constriction section; 31. Round rod; 32. Flange; 41. Refractory block; 42. Insulation block; 43. Rigid block; 101. Installation area; 102. Settling tank; 401. Stepped step; 411. Submodule; 1101. Oxygen-enriched air inlet; 4111. Fan-shaped block; 4301. U-shaped channel. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0032] Example 1: As Figure 2-8 As shown, an oil furnace carbon black production apparatus of the present invention includes a front furnace body 1, a rear furnace body 2, a connecting piece 3, and a modular stepped section 4.

[0033] The front section of the furnace body 1 consists of a combustion section 11 and a throat section 12 that are interconnected from front to back. The combustion section 11 is equipped with an oxygen-enriched air inlet 1101 for introducing oxygen-enriched air into the combustion chamber. The throat section 12 is equipped with a raw material oil gun 13 for injecting raw material oil.

[0034] like Figure 2 As shown, the first half of the throat section 12 is a conical structure, and the second half is a straight cylindrical structure. The raw material oil gun 13 is a long raw material oil gun, and its nozzle is located on the rear side of the conical structure, near the front end of the straight cylindrical structure.

[0035] The rear furnace body 2, from front to back, has an interconnected reaction cylinder section 21 and a quench section 22. For example... Figure 2 As shown, a rapid cooling constriction section 23 is provided between the reaction straight section 21 and the rapid cooling section 22. This constriction structure increases the spray coverage of the rapid cooling water, ensuring that the high-temperature flue gas can be cooled quickly and evenly, thereby locking the shape of the high-structure aggregate and preventing structural collapse.

[0036] Furthermore, the ratio of the diameter of the reaction cylindrical section 21 to the diameter of the rear end port of the throat section 12 (i.e., the rear end port of the cylindrical structure) is 5:1-7:1. In this embodiment, it is specifically 6:1, which effectively enlarges the diameter and length of the reaction section, significantly increases the reaction residence time, and allows the carbon black particles to obtain more sufficient opportunities for collision and structural growth, thereby achieving a significant improvement in the structural value.

[0037] The connector 3 includes two parallel round rods 31 and two flanges 32. For example... Figure 3 and Figure 5 As shown, the round rod 31 is welded and fixed between two flanges 32. A recess 102 is provided at the rear end of the front furnace body 1 and the front end of the rear furnace body 2. The two flanges 32 are respectively embedded in the recesses 102 on their corresponding sides and fixed with bolts. After fixing, an installation area 101 is formed between the front furnace body 1 and the rear furnace body 2. The modular stepped section 4 is detachably installed within the installation area 101.

[0038] The modular stepped section 4 has a stepped cavity, through which the throat section 12 and the reaction cylinder section 21 are connected. This stepped cavity can effectively prolong the reaction residence time, enhance the eddy current of the flow field, and increase the collision probability of carbon black particles, thereby significantly improving the structural value and electrical conductivity of the carbon black. At the same time, the modular stepped section 4 is easy to maintain and the corresponding modules can be replaced according to different process requirements, realizing multi-purpose use and greatly improving the versatility of the equipment.

[0039] Among them, such as Figure 4-8 As shown, the modular stepped section 4 includes multiple fan-shaped refractory blocks 41, multiple fan-shaped heat insulation blocks 42, and multiple fan-shaped rigid blocks 43. The multiple refractory blocks 41 are spliced ​​and fixed end-to-end along the circumference of the furnace body to form a first cylindrical structure. The front end of the first cylindrical structure abuts against the rear end of the front section of the furnace body 1, and the rear end of the first cylindrical structure abuts against the front end of the rear section of the furnace body 2. A stepped step 401 is provided axially on the inner ring surface of the first cylindrical structure, thereby forming the aforementioned stepped cavity. The front end of the stepped cavity communicates with the throat section 12, and the rear end communicates with the reaction cylinder section 21.

[0040] Multiple heat insulation blocks 42 are spliced ​​and fixed along the circumference of the furnace body to form a second cylindrical structure. The second cylindrical structure wraps around the outer circumference of the first cylindrical structure to form a heat insulation layer. The front end of this heat insulation layer abuts against the rear end of the front section of the furnace body 1, and the rear end abuts against the front end of the rear section of the furnace body 2. At the same time, the heat insulation blocks 42 and refractory blocks 41 are arranged alternately along the circumference to form a staggered fit and achieve a seal.

[0041] Multiple rigid blocks 43 are spliced ​​and fixed together along the circumference of the furnace body to form a third cylindrical structure. The third cylindrical structure wraps around the outer periphery of the second cylindrical structure, forming a rigid layer to enhance structural strength. Simultaneously, the front end of the third cylindrical structure abuts against the rear end of the front section of the furnace body 1, and the rear end abuts against the front end of the rear section of the furnace body 2. Similarly, the rigid blocks 43 and the heat insulation blocks 42 are arranged alternately along the circumference, forming a staggered fit to achieve a seal.

[0042] like Figure 4As shown, after the rigid layer is installed, two adjacent rigid blocks 43 in the circumferential direction are pressed and fixed together by a combination of plates and bolts. At the same time, a sealing tape is used to seal the joint between the rigid layer and the adjacent furnace body.

[0043] To facilitate the installation of the rigid layer, such as Figure 5 As shown, a U-shaped groove 4301 is provided on the inner ring surface of the rigid block 43 at the position corresponding to the circular rod 31. The circular rod 31 slides in the U-shaped groove 4301, which serves as a guide and positioning function when installing the rigid block 43. Figure 3 As shown, the refractory block 41 and the heat insulation block 42 enter and exit the installation area 101 from between adjacent round rods 31.

[0044] Based on the above structure, the refractory block 41 includes multiple sets of sub-modules 411, which are stacked sequentially along the furnace body axis, and the radial width of the multiple sets of sub-modules 411 decreases from front to back along the furnace body axis. Each set of sub-modules 411 includes multiple sector blocks 4111 of the same thickness. This structure allows for flexible adjustment of the step dimensions of each level of the stepped cavity. By replacing sector blocks 4111 with different radial widths or changing the number of sector blocks 4111, the expansion ratio and step length can be continuously adjusted to adapt to different product requirements and further improve the versatility of the equipment.

[0045] During adjustment, such as Figure 7 As shown, taking the refractory block 41, which includes three sets of sub-modules 411, as an example, each set of sub-modules 411 consists of four sector-shaped blocks 4111 of the same thickness. The radial thicknesses of the three sets of sub-modules 411 are 150mm, 100mm, and 50mm, respectively, and they are stacked to form... Figure 7 The stepped refractory block 41 is shown. When it is necessary to increase the step length by 150mm in radial thickness, the number of sector blocks 4111 in this group of sub-modules 411 is increased to five, while the number of sector blocks 4111 in the sub-module 411 with a radial thickness of 100mm is reduced to three. Similarly, by increasing or decreasing the number of sector blocks 4111 at different positions, the step length can be flexibly adjusted.

[0046] In addition, such as Figure 7 As shown, lifting rings are provided on the outer ring surface of the sector block 4111, the outer ring surface of the heat insulation block 42, and the outer ring surface of the rigid block 43 for easy hoisting. Correspondingly, grooves for accommodating the lifting rings are provided on the inner ring surface of the rigid block 43 and the inner ring surface of the heat insulation block 42.

[0047] Example 2: Carbon black is produced using the above-mentioned apparatus. The specific steps are as follows: S1. Introduce oxygen-enriched air into combustion section 11, with an oxygen enrichment ratio of 1%-3%. Simultaneously, control the amount of excess oxygen entering the reaction section through high and low furnace temperature operation. Oxygen enrichment refers to injecting pure oxygen into combustion air with an oxygen volume fraction of 21%. When the oxygen content accounts for 22% of the combustion air, it is called adding 1% oxygen enrichment.

[0048] S2. The desolidified catalytic slurry (solid content ≤10ppm) is injected through the long feed oil gun 13 on the throat section 12, and the ratio of feed oil to air is controlled to increase synchronously with the oxygen enrichment ratio. In this embodiment, under the condition of 3% oxygen enrichment, the feed oil / air ratio is controlled at 2.20 (see Table 1).

[0049] S3. The reactant stream passes through modular stepped section 4. The stepped cavity extends the reaction residence time to 7 times that of a conventional reactor (the diameter of the reaction section is increased to 6 times the diameter of the throat, and the reaction volume increases 7 times), allowing carbon black particles to collide fully and form high-structure aggregates. At the same time, the stepped steps 401 increase the eddy current in the flow field, further improving the collision probability.

[0050] S4. The product is obtained by rapid cooling in the rapid cooling section 22. The rapid cooling constriction section 23 ensures that the rapid cooling water spray evenly covers the entire cross-section of the furnace, achieving instantaneous rapid cooling.

[0051] In this embodiment, by introducing 3% oxygen-enriched air into the combustion section 11 and simultaneously increasing the ratio of raw oil to air to 2.20 when injecting raw oil, the excess oxygen content in the reaction system increases, generating more incomplete combustion heat and consuming reaction energy. This promotes the collisional dehydrogenation of carbon black particles to improve the structural value and forms pores on the carbon black surface through the etching effect, thereby improving its conductivity. Simultaneously, the residence time of the reaction stream is significantly extended as it passes through the stepped cavity, allowing the carbon black particles to fully collide and form high-structure aggregates. Finally, the aggregates are rapidly cooled and shaped in the quench section 22, thus efficiently and stably producing high-structure conductive carbon black.

[0052] The carbon black product was tested using conventional testing equipment, and the results are shown in Table 2: the oil absorption value (DBP) was 150 × 10⁻⁶. -5 m 3 / kg, the difference between the total nitrogen adsorption surface area (250×10³m² / kg) and the specific surface area (68×10³m² / kg) is 142×10³m² / kg.

[0053] Comparative Example 1: Carbon black was produced using the apparatus described in Example 1 and according to the method described in Example 2, except that: no oxygen enrichment was added (oxygen enrichment ratio was 0%), the combustion air was ordinary air (oxygen content 21%), and the ratio of feed oil to air was adjusted accordingly to 1.80 (see "No Oxygen Enrichment" condition in Table 1). The obtained carbon black product was tested using conventional methods, and the results are shown in the "No Oxygen Enrichment" column of Table 2: the oil absorption value DBP was 180 × 10⁻⁶. -5 m 3 / kg, the difference between the total surface area and the specific surface area of ​​nitrogen adsorption is 5×10³m² / kg.

[0054] To verify the effect of oxygen enrichment ratio on carbon black performance, in addition to Example 2 (3% oxygen enrichment) and Comparative Example 1 (no oxygen enrichment), two intermediate conditions of 1% and 2% oxygen enrichment were also set up for production. The process parameters under each condition are shown in Table 1, and the product performance is shown in Table 2.

[0055] Table 1: Operating conditions after complete combustion in the combustion chamber under different oxygen enrichment ratios, with the same furnace temperature of 1982℃, air heating temperature of 800℃, and natural gas calorific value of 8539 kcal / Nm³.

[0056] Table 2: Carbon black sample mass data under different oxygen enrichment ratios

[0057] As shown in Table 2, the structural values ​​(oil absorption and compression oil absorption) of carbon black significantly increase with the increase of oxygen enrichment. Simultaneously, the difference between nitrogen adsorption and specific surface area (characterizing pores formed by etching) increases significantly with the increase of oxygen enrichment ratio, indicating that oxygen enrichment provides more energy for energy consumption, causing etching of the primary carbon black particles and forming pores, which is beneficial for improving electrical conductivity.

[0058] Even without oxygen enrichment (no oxygen enrichment), the carbon black product produced using the apparatus of this invention has a DBP value of 10. -5 m 3 / kg, significantly better than the existing technology where DBP is difficult to exceed 150×10 -5 m 3 / kg level. This fully demonstrates that the present invention, through modular stepped sections to extend the reaction residence time, increase the degree of eddy current, and improve the collision probability, has been able to break through the upper limit of the traditional carbon black structural value. On this basis, further addition of oxygen enrichment (especially 3% oxygen enrichment) further increases the DBP value to 280×10 -5 m 3 / kg, the nitrogen adsorption-specific surface area difference reaches 142×10³m² / kg, achieving even better technical results.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An apparatus for producing carbon black using an oil furnace method, characterized in that: It includes the front furnace body (1), the rear furnace body (2), connecting parts (3), and modular stepped sections (4), among which, The front section of the furnace body (1) has a combustion section (11) and a throat section (12) that are connected to each other from front to back. The rear furnace body (2) has a reaction cylinder section (21) and a quenching section (22) that are interconnected from front to back. The connector (3) connects the front furnace body (1) and the rear furnace body (2), and an installation area (101) is formed between the front furnace body (1) and the rear furnace body (2). The modular stepped section (4) is detachably installed in the installation area (101) to form a complete furnace body. The inner cavity of the modular stepped section (4) is a stepped cavity. The throat section (12) and the reaction cylinder section (21) are connected through the stepped cavity.

2. The oil furnace carbon black production apparatus as described in claim 1, characterized in that: The combustion section (11) is provided with an oxygen-enriched air inlet (1101), and the throat section (12) is provided with a raw material oil gun (13).

3. The oil furnace carbon black production apparatus as described in claim 1, characterized in that: A quenching constriction section (23) is provided between the reaction cylinder section (21) and the quenching section (22), and the ratio of the diameter of the reaction cylinder section (21) to the diameter of the rear end port of the throat section (12) is 5:1-7:

1.

4. The oil furnace carbon black production apparatus as described in claim 1, characterized in that: The modular stepped section (4) includes multiple fan-shaped refractory blocks (41), multiple fan-shaped heat insulation blocks (42), and multiple fan-shaped rigid blocks (43), wherein, Multiple refractory blocks (41) are spliced ​​and fixed end to end along the circumference of the furnace body to form a first cylindrical structure; Multiple heat insulation blocks (42) are spliced ​​and fixed end to end along the circumference of the furnace body to form a second cylindrical structure, and the second cylindrical structure is wrapped around the outer periphery of the first cylindrical structure; Multiple rigid blocks (43) are spliced ​​and fixed end to end along the circumference of the furnace body to form a third cylindrical structure, which is wrapped around the outer periphery of the second cylindrical structure; The inner ring surface of the first cylindrical structure is provided with a stepped step (401) along the axial direction to form the stepped cavity.

5. The oil furnace carbon black production apparatus as described in claim 4, characterized in that: The refractory block (41) includes multiple sets of sub-modules (411), wherein, Multiple sets of the aforementioned sub-modules (411) are stacked sequentially along the furnace body axis; The radial width of the multiple sets of sub-modules (411) decreases from front to back along the axial direction of the furnace body.

6. The oil furnace carbon black production apparatus as described in claim 5, characterized in that: Each group of sub-modules (411) includes multiple sector blocks (4111) of the same thickness.

7. The oil furnace carbon black production apparatus as described in claim 4, characterized in that: The connector (3) includes a round rod (31) and two flanges (32), wherein, The round rod (31) is fixed between the two flanges (32), and two round rods (31) are arranged in parallel. The rear end of the front furnace body (1) and the front end of the rear furnace body (2) are both provided with sinkers (102), and the flange (32) is fixed in the sinker (102) on the corresponding side.

8. The oil furnace carbon black production apparatus as described in claim 7, characterized in that: The rigid block (43) has a U-shaped groove (4301) on its inner ring surface at the position corresponding to the round rod (31). The round rod (31) is in sliding engagement with the U-shaped groove (4301) on the corresponding side.

9. A method for producing carbon black using the apparatus according to any one of claims 1-8, characterized in that: Includes the following steps: S1. Introduce oxygen-enriched air into the combustion section (11), with an oxygen enrichment ratio of 1%-3%; S2. Inject the raw material oil through the throat section (12) and control the ratio of raw material oil to air to increase synchronously with the oxygen enrichment ratio. S3. The reaction stream passes through the modular stepped section (4), and the stepped cavity extends the reaction residence time to a level sufficient for the carbon black particles to fully collide and form high-structure aggregates. S4. After rapid cooling in the rapid cooling section (22), carbon black product is obtained.

10. A carbon black product prepared by the method of claim 9.

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