Soft carbon black furnace reactor
By introducing an axial combustion air jacket and a multi-feed oil gun system into the soft carbon black reactor, combined with a large-size design, the coking problem was solved, enabling efficient production of large virgin soft carbon black particles and improving tire product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LABELLE (WUHAN) TECHNOLOGY CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-23
AI Technical Summary
Existing soft carbon black reactor designs cannot produce soft carbon black with an iodine adsorption value below 25, and coking is prone to occur inside the reactor, resulting in high sieve residue values and affecting the quality of the final product.
The system employs a multi-feed oil gun system with an axial combustion air jacket, combined with a large-size reactor and tangential/axial air design, to provide an adjustable spray system, increasing the collision space and uniformity of the feed oil and preventing coking.
It improved the production efficiency of soft carbon black, reduced the detection value of sieve residue, generated large virgin carbon black particles, which have good low heat generation properties and improved the quality of tire products.
Smart Images
Figure CN224394795U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of carbon black production equipment, and more specifically, it relates to a soft carbon black furnace reactor. Background Technology
[0002] The greatest demand for carbon black is in tire manufacturing, mainly hard carbon black for tire tread and soft carbon black for tire carcass. Since white carbon black, which has low rolling resistance and good grip, has replaced some of the demand for hard carbon black in semi-steel tires, soft carbon black plays a particularly important role in the carbon black industry.
[0003] Soft carbon black has larger primary particles than hard carbon black (e.g., Figure 1 As shown in the diagram, a higher feedstock concentration is required. Therefore, Philips Petroleum Corporation in the United States uses a tangential combustion air reactor to avoid excessive feedstock spray forming a large amount of hard carbon on the reactor's refractory mud walls (because after rinsing with water, the residue remaining on the screen is called sieve residue). Meanwhile, large virgin carbon black particles have good low heat generation properties, which can better reduce tire rolling resistance.
[0004] Figure 2 This is a schematic diagram of the longitudinal section structure of a second-generation soft carbon black furnace. Figure 3 This is a schematic diagram of the tangential air cross-section structure design of the second-generation soft carbon black furnace. It can be seen that the existing soft carbon black furnace reactors in China have a relatively small diameter (about 1300-1500 mm). The operating flow rate of a single feed oil gun is usually higher than 7000 kg / h, and there is only a tangential combustion air flow field. There is also a narrowing in the middle of the reactor, which affects the collision, polymerization, dehydrogenation and fusion of the primary carbon black particles after they are generated.
[0005] In addition, the design and structure of existing soft carbon black reactors in China have problems, making it impossible to produce soft carbon black with an iodine adsorption value of less than 25. This is mainly because the original soft carbon black particles are large, requiring a high reaction concentration. High reaction concentrations easily cause coking on the refractory mud walls inside the reactor, further forming hard carbon. The high residue detection value is not conducive to subsequent tire processing and affects the quality of the final product. Utility Model Content
[0006] To address the aforementioned issues, this invention provides a soft carbon black furnace reactor. By developing a raw material oil gun with an axial combustion air jacket, utilizing a large-size reactor, and incorporating a multi-raw material oil gun system and tangential / axial air design, a soft carbon black furnace reactor with adjustable and perfect spraying and carbon black production is provided. This solves the problems of easy coking and high sieve residue detection values in existing soft reactors, resulting in larger virgin particles and improved production efficiency.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A reactor for producing soft carbon black using an oil furnace method includes a reactor cavity, a multi-raw material oil spray gun system located at the oil inlet end of the reactor cavity, and a pressure stabilizing pipe located at the other end and connected to the reactor cavity; a tangential air pipe is provided on the outer wall of the reactor cavity.
[0009] The oil gun spray system includes a feed panel, on which multiple raw material oil guns are arranged, and an axial combustion air sleeve is fitted around the periphery of each raw material oil gun.
[0010] The feedstock oil is injected into the reactor chamber through the feedstock oil gun;
[0011] Axial combustion air enters the reactor cavity from the axial combustion air jacket;
[0012] Tangential air enters the reactor chamber through the tangential air duct;
[0013] The powdered carbon black generated inside the reactor chamber rises with the carbon black flue gas and is then discharged through the pressure stabilizing pipe.
[0014] As one embodiment of this utility model, the feed panel is equipped with 8 to 14 raw material oil guns.
[0015] As one embodiment of this utility model, multiple raw material oil guns are arranged radially and alternately on the feed panel of the reactor with the center of the feed panel as the center.
[0016] As an embodiment of this utility model, the oil furnace method for producing soft carbon black includes a third-generation vertical furnace and a third-generation horizontal furnace for soft carbon black; both the third-generation vertical furnace and the third-generation horizontal furnace for soft carbon black have 9 to 13 raw material oil guns.
[0017] In one embodiment of this utility model, the diameter of the reactor cavity is 2000-2600 mm.
[0018] As one embodiment of this utility model, the tangential air duct is arranged along the tangential direction of the reactor cavity.
[0019] In one embodiment of this utility model, the tangential air duct is located at one end of the feed panel near the oil gun spray system.
[0020] As one embodiment of this utility model, the tangential air pipes are in two sets, respectively symmetrically arranged on both sides of the reactor cavity.
[0021] As an embodiment of this utility model, the oil furnace soft carbon black production reactor also includes a temperature detector installed on the reactor cavity to determine the temperature of the carbon black flue gas in the reactor cavity.
[0022] As an embodiment of this utility model, the oil furnace method soft carbon black production reactor also includes a viewing mirror set on the reactor cavity to observe the spray pattern of the raw material oil gun in the reactor cavity and whether there is coking on the reactor cavity.
[0023] The beneficial effects of this utility model are:
[0024] 1) The carbon black soft material third-generation furnace reactor provided by this utility model has the following advantages over the carbon black soft material second-generation furnace reactor:
[0025] a) Increased Axial Airflow: The second-generation carbon black soft-pressurized oil furnace reactor only has tangential airflow. The third-generation carbon black soft-pressurized oil furnace reactor, in addition to tangential airflow, is equipped with an axial combustion air jacket for each feed oil gun, thus increasing axial airflow. This structure of the carbon black soft-pressurized oil furnace reactor promotes the axial movement of the feed oil within the reactor, reduces the spray pattern of the feed oil, and prevents the feed oil sprayed from different guns from overlapping and forming water washing. Simultaneously, the tangential airflow controls the flow field pattern inside the reactor, increasing the probability of collisions between primary carbon black particles within the reactor.
[0026] b) Increased diameter: Compared to the existing carbon black soft second-generation furnace reactor with a diameter of about 1300-1500 mm, the diameter of the carbon black soft third-generation furnace reactor of this utility model is about 2000-2600 mm. The increased diameter of the reactor cavity increases the collision space of the primary carbon black particles in the reactor.
[0027] c) Increased number of feed oil guns: The second-generation carbon black soft furnace has a single feed oil gun, while the third-generation carbon black soft horizontal furnace can have up to nine feed oil guns, and the third-generation carbon black soft vertical furnace can have up to 13 feed oil guns. This multi-feed oil gun design reduces the feed rate per gun. The operating flow rate of feed oil in the second-generation carbon black soft furnace is typically above 7000 kg / h, while in the third-generation carbon black soft furnace, the operating flow rate per gun is reduced to below 2000 kg / h. Multiple oil guns are radially and staggered on the reactor feed panel, centered on the feed panel's center. This distribution allows the feed oil to enter the reactor in a more diffused manner, diluting its concentration in space, resulting in more uniform heating and avoiding coking problems caused by uneven heating, thus reducing water washing.
[0028] 2) The reactor for producing soft carbon black by oil furnace method provided by this utility model introduces a multi-raw material oil gun system, a large reactor diameter and tangential / axial combustion air under the reactor of axial air-purge type raw material oil gun to change the spray pattern of raw material oil, thereby producing large primary granular soft carbon black of different types.
[0029] 3) The reactor of this invention overcomes the problem of high residue detection value and has lower oil consumption per unit of large virgin particles. The soft carbon black of large virgin particles has good low heat generation properties, which can better reduce the rolling resistance of tires, improve the quality of tire products, and be better applied in the carbon black and tire industry. Attached Figure Description
[0030] Figure 1 This diagram illustrates the morphological differences between the soft carbon black and hard carbon black of this invention.
[0031] Figure 2 A schematic diagram of the longitudinal section structure of the second-generation soft carbon black furnace;
[0032] Figure 3 This is a schematic diagram of the tangential air cross-sectional structure design of the second-generation soft carbon black furnace.
[0033] Figure 4 This is a schematic diagram of the longitudinal section structure of the third-generation vertical furnace for soft carbon black according to this utility model.
[0034] Figure 5 This is a schematic diagram of the cross-sectional structure of the third-generation vertical furnace for soft carbon black according to this utility model.
[0035] Figure 6 This is a schematic diagram of the longitudinal section structure of the third-generation horizontal furnace for soft carbon black according to this utility model;
[0036] Figure 7 This is a schematic diagram of the cross-sectional structure of the third-generation horizontal furnace for soft carbon black according to this utility model. Detailed Implementation
[0037] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. It should be understood that the following embodiments are only illustrative and explanatory of this utility model, and should not be construed as limiting the scope of protection of this utility model. All technologies implemented based on the above content of this utility model are covered within the scope of protection intended by this utility model.
[0038] Unless otherwise stated, the raw materials and reagents used in the following examples are all commercially available products.
[0039] like Figure 4-5As shown, the oil furnace method for producing soft carbon black includes a reactor chamber 1, a multi-raw material oil spray system 2 located at the oil inlet end of the reactor chamber 1, and a pressure stabilizing pipe 3 located at the other end and connected to the reactor chamber 1. A tangential air pipe 4 is provided on the outer wall of the reactor chamber 1; preferably, the tangential air pipe 4 is located at one end near the multi-raw material oil spray system 2.
[0040] The oil spray system 2 includes a feed panel 5, on which multiple raw material oil guns 6 are arranged. An axial combustion air sleeve 7 is fitted around the periphery of each raw material oil gun 6. Raw material oil is sprayed into the reactor chamber 1 through the raw material oil guns 6. Axial combustion air enters the reactor chamber 1 through the axial combustion air sleeve 7, and tangential air enters the reactor chamber 1 through the tangential air pipe 4. Powdered carbon black generated inside the reactor chamber 1 rises with the carbon black flue gas to the pressure stabilizing pipe 3 and is then discharged.
[0041] Since soft carbon black is not directly used for wear resistance, the virgin particles are larger than those of hard carbon black. Large virgin particles have very good extrusion processability. Due to the large size of the virgin particles, high-temperature pyrolysis heat mass is not required. Research has found that what is actually needed is a suitable collision space for aggregate formation. In view of this characteristic, this invention increases the reaction volume of the soft carbon black reactor by 5 times or more, providing sufficient volume space for the complete reaction formation of soft carbon black.
[0042] Preferably, the diameter of the reactor chamber 1 is 2000-2600 mm. Compared with existing furnace bodies, the diameter of the reactor chamber of this invention is increased by approximately 60%. Employing a carbon black soft third-generation furnace reactor, a small portion of the feed oil is used for complete combustion during operation, providing heat for feed evaporation and gasification. This structure avoids the fuel system design required for normal operation in existing furnace types, thus saving fuel consumption.
[0043] Specifically, the feed panel 5 is equipped with 8 to 14 raw material oil guns 6.
[0044] A novel soft carbon black furnace reactor with a cavity diameter of approximately 2000–2600 mm is employed, equipped with multiple feed oil guns, such as 13 in a vertical furnace and 9 in a horizontal furnace, which can reduce the operating flow rate of each gun to below 2000 kg / h. The reactor utilizes both tangential and axial combustion airflow fields, increasing the reactor volume by approximately 5 times compared to existing furnace types. This significantly dilutes the feed oil concentration in the reactor flow field, which is beneficial for generating large virgin soft carbon black particles.
[0045] Specifically, multiple feed oil guns 6 are radially and staggered on the feed panel 5 of the reactor, with the center of the feed panel 5 as the center. This distribution method facilitates the feed oil to enter the reactor in a more diffused form, diluting the concentration of the feed oil in space, resulting in more uniform heating, avoiding coking problems caused by uneven heating, and reducing water washing.
[0046] According to this invention, the oil furnace method for producing soft carbon black includes a third-generation vertical furnace and a third-generation horizontal furnace. Compared to the horizontal furnace, the vertical furnace has an additional downward force caused by gravity, increasing the probability of particle collision. Both the horizontal and vertical furnaces experience increased axial and tangential airflow disturbances and have larger dimensions than existing second-generation furnaces.
[0047] In one specific embodiment, the cavity of the third-generation vertical furnace for soft carbon black is 2530 mm and has 9 to 13 raw material oil guns, while the cavity of the third-generation horizontal furnace for soft carbon black is 2100 mm and has 9 to 13 raw material oil guns.
[0048] The multi-feed oil gun design reduces the feed rate of a single oil gun. In the second-generation soft carbon black furnace, the operating flow rate of the feed oil typically exceeds 7000 kg / h, while in the third-generation soft carbon black furnace, the operating flow rate per gun is reduced to below 2000 kg / h. By adjusting the feed oil gun configuration and controlling the flow rate, the cracking and polymerization reaction steps in carbon black production can be flexibly controlled to produce different types of carbon black.
[0049] Preferably, the tangential air duct is located at one end of the feed panel near the oil gun spray system, along the tangential direction of the furnace body. For example, there are two sets of tangential air ducts, symmetrically arranged on both sides of the reactor cavity.
[0050] In one embodiment of the present invention, the oil furnace method for producing soft carbon black reactor further includes a temperature detector installed on the reactor cavity to determine the temperature of the carbon black flue gas in the reactor cavity 1.
[0051] Preferably, the oil furnace method for producing soft carbon black also includes a viewing mirror installed on the reactor cavity to observe the spray pattern of the raw material oil gun 6 in the large-diameter reactor cavity 1, and whether there is coking on the reactor cavity.
[0052] The operational reaction process of this utility model is as follows:
[0053] The feedstock oil enters the reactor in a converging spray pattern through a feedstock oil gun under the action of axial wind (axial combustion air). A small portion of the feedstock oil is completely combusted, providing heat for evaporation and gasification. The flow field pattern inside the reactor is controlled by both tangential and axial wind, allowing the gasified feedstock oil to collide fully within the large-diameter reactor, forming soft carbon black. The cracking and polymerization reaction process of the feedstock oil can be controlled by adjusting the feedstock oil gun distribution and flow rate to produce different types of carbon black.
[0054] Each feedstock gun has an axial combustion air jacket to amplify the feedstock spray, and the tangential / axial combustion air design controls the internal flow field of the reactor. The entire internal flow field is divided into three layers. By distributing and controlling the flow rate of the feedstock guns, the steps of the cracking and polymerization production reaction can be flexibly controlled to generate different types of carbon black.
[0055] This invention develops a raw material oil gun with an axial combustion air jacket, and utilizes a large-size reactor, along with a multi-raw material oil gun system and a tangential / axial wind design, to provide a more flexible and controllable perfect spray, solving the problem of residue after coking and increasing the size of the original particles.
[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A soft carbon black furnace reactor, characterized in that, It includes a reactor cavity (1), a multi-raw material oil gun spray system (2) installed at the oil inlet end of the reactor cavity (1), and a pressure stabilizing pipe (3) installed at the other end and connected to the reactor cavity (1); a tangential air pipe (4) is installed on the outer wall of the reactor cavity (1). The oil gun spray system (2) includes a feed panel (5), on which a plurality of raw material oil guns (6) are arranged, and an axial combustion air sleeve (7) is fitted around the periphery of the raw material oil guns (6). The raw oil is sprayed into the reactor cavity (1) through the raw oil gun (6); Axial combustion air enters the reactor cavity (1) from the axial combustion air jacket (7); Tangential air enters the reactor cavity (1) from the tangential air duct (4); The powdered carbon black generated inside the reactor cavity (1) rises with the carbon black flue gas to the pressure stabilizing pipe (3) and is then discharged.
2. The soft carbon black furnace reactor according to claim 1, characterized in that, The feed panel (5) is equipped with 8 to 14 raw material oil guns (6).
3. The soft carbon black furnace reactor according to claim 1, characterized in that, Multiple raw material oil guns (6) are arranged radially and alternately on the feed panel (5) of the reactor, with the center of the feed panel (5) as the center.
4. The soft carbon black furnace reactor according to claim 1, characterized in that, The diameter of the reactor chamber (1) is 2000~2600 mm.
5. The soft carbon black furnace reactor according to claim 1, characterized in that, The tangential air duct (4) is arranged along the tangential direction of the reactor cavity (1).
6. The soft carbon black furnace reactor according to claim 1, characterized in that, The tangential air duct (4) is located at one end of the feed panel near the oil gun spray system.
7. The soft carbon black furnace reactor according to claim 1, characterized in that, Two sets of tangential air ducts (4) are symmetrically arranged on both sides of the reactor cavity (1).
8. The soft carbon black furnace reactor according to claim 1, characterized in that, The soft carbon black furnace reactor includes a third-generation soft carbon black vertical furnace and a third-generation soft carbon black horizontal furnace; the third-generation soft carbon black horizontal furnace has 9 to 13 raw material oil guns, and the third-generation soft carbon black vertical furnace has 9 to 13 raw material oil guns.
9. The soft carbon black furnace reactor according to claim 1, characterized in that, It also includes a temperature detector installed on the reactor cavity (1) to determine the temperature of the carbon black flue gas inside the reactor cavity (1).
10. The soft carbon black furnace reactor according to claim 1, characterized in that, It also includes a viewing mirror installed on the reactor cavity (1) to observe the spray pattern of the raw material oil gun (6) in the reactor cavity (1) and whether there is coking on the reactor cavity.