Process for the production of environmentally friendly carbon black for rubber

Abstract

The present application relates to a kind of production method of environment-friendly carbon black for rubber, belong to carbon black production technical field.It includes the following steps: raw material oil refining, combustion stage, reaction stage, quenching stage, residence stage, collection, granulation, drying.The present application can produce low aromatic content green tire environment-friendly carbon black, not only can be applied to high-end environment-friendly rubber products, also can be applied to low rolling resistance green tire.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of carbon black production, and particularly relates to a production method of environment-friendly carbon black for rubber. BACKGROUND

[0002] Carbon black is mainly applied in the tire and rubber product industries. Because of the production process, more aromatic hydrocarbon substances are easily left on the surface of carbon black. The aromatic hydrocarbon substances on the surface of carbon black are mainly polycyclic aromatic hydrocarbons. Polycyclic aromatic hydrocarbons are a class of compounds that can be adsorbed on the surface of carbon black during the production process of carbon black. Because of the strong adsorption capacity of polycyclic aromatic hydrocarbons, when they exist on the surface of carbon black, a covering layer is formed and part of the surface area of carbon black is occupied. These aromatic hydrocarbon substances are extremely harmful to the human body. In particular, when applied in rubber products such as sealing strips, the odor is difficult to dissipate and is easily inhaled by the human body. With the proposal of the REACH regulation by the European Union, the environmental performance requirements for carbon black in the industry market are continuously improved. The technologies of various carbon black production plants are scattered and secret, and a unified technical index has not been formed.

[0003] The existing carbon black production technology is carried out under the condition of oxygen deficiency in the whole process. The reaction stage is the cracking of coal tar under the condition of oxygen deficiency. The main component of coal tar is polycyclic aromatic hydrocarbons. If the combustion is not sufficient, a large amount of polycyclic aromatic hydrocarbons will be left on the surface of carbon black. The content of aromatic hydrocarbons on the surface of carbon black can only be eliminated by controlling and prolonging the reaction time, but the reaction time is not easy to control. The temperature in the drying stage can reach 1200 DEG C. In order to prevent carbon black from catching fire, it needs to be transported under the condition of oxygen deficiency, and the residual polycyclic aromatic hydrocarbons cannot be oxidized and removed.

[0004] At the same time, the largest application market of carbon black is tires. The specific surface area of carbon black has an impact on the rolling resistance of tires. The larger the specific surface area of carbon black, the greater the rolling resistance of tires, and the greater the fuel consumption of tires. According to statistics, about 8-20% of gasoline for passenger cars is consumed by the rolling resistance of tires, and about 25-35% of gasoline for trucks is consumed by the rolling resistance of tires. According to the prediction of industry experts, if the rolling resistance of radial tires is reduced by 20-30%, the oil saving can reach 5-7%, and the carbon dioxide emission per 100 kilometers is reduced by 400g. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art and provide a production method of environment-friendly carbon black for rubber. The present application can produce environment-friendly carbon black with low aromatic hydrocarbon content for green tires. It can not only be applied to high-end environment-friendly rubber products, but also be applied to green tires with low rolling resistance.

[0006] The technical scheme adopted by the present application to solve the problems existing in the prior art is:

[0007] The production method of environment-friendly carbon black for rubber comprises the following steps:

[0008] Refining of raw oil: the raw oil containing anthracene oil is treated by sedimentation and centrifugation to remove mechanical impurities in the raw oil, and then the oil is emulsified by an emulsifying pump;

[0009] Combustion stage: the air made by a centrifugal fan is preheated to 900-1000℃ by an air preheater, and then enters a reaction furnace to be mixed and combusted with fuel and dehydrated tail gas to form a high-temperature high-speed turbulent flame of 100-150 m / s at 1900-2000℃;

[0010] Reaction stage: the raw oil is left to stand, and then is pressurized and heated to be sprayed into the reaction furnace in a mist form, and is subjected to the shearing action of the high-temperature high-speed airflow at 1900-2000℃ to make the raw oil undergo incomplete combustion and cracking reaction to generate carbon black;

[0011] Quenching stage: after the reaction stage, the high-temperature flue gas from the reaction stage is reduced to 900-930℃ by spraying cold water to terminate the cracking reaction;

[0012] Residence stage: after the reaction is completed in the quenching stage, the flue gas pipeline is increased in diameter and reduced in flow rate, and the quenching water sprayed into the reaction furnace in this stage can be fully mixed with the carbon black flue gas and gasified, and the flue gas passes through the residence stage and then enters the air preheater; between the residence stage and the air preheater, 200-500 Nm3 / h of high-temperature air at 910-980℃ is introduced in a reverse spraying manner for a second time to oxidize the carbon black, so that the polycyclic aromatic hydrocarbons on the surface of the carbon black are decomposed again;

[0013] The carbon black treated in the residence stage is collected, granulated and dried.

[0014] Preferably, the raw oil includes anthracene oil and ethylene tar.

[0015] Preferably, the raw oil is mixed in a ratio of 20%:80% of anthracene oil to ethylene tar.

[0016] Preferably, the ethylene tar needs to meet the following requirements: moisture ≤3.0%, density 1.050-1.100 g / cm3, 80℃ Engler viscosity ≤9.0, toluene insolubles ≤1.0%, 210℃ distillation residue (%) ≤20, 360℃ distillation residue (%) ≥70.

[0017] The anthracene oil needs to meet the following requirements: moisture ≤0.8%, density 1.100-1.150 g / cm3, 80℃ Engler viscosity ≤1.5, toluene insolubles ≤1.0%, 210℃ distillation residue (%) ≤5, 360℃ distillation residue (%) ≥55.

[0018] Preferably, the combustion stage, centrifugal fan per hour to produce 19000-20000Nm3 / h of 100 ℃-115 ℃, 87-93kpa air.

[0019] Preferably, the combustion stage, the fuel oil is mixed with compressed air before being sprayed into the reactor by a composite oil pipe at the front end of the reactor to achieve the effect of atomization; the dehydrated tail gas is pressurized to more than 55kpa at the same position and enters the reactor.

[0020] Preferably, the reaction stage: the mixed raw oil is placed in the storage tank for 24 hours and heated to 80-90℃ to reduce the viscosity for easy transportation, and is pressurized to 3.2-3.5MPa by the raw oil pump and preheated to more than 220℃ by the raw oil preheater.

[0021] Preferably, the reaction stage, the raw oil pressure is controlled at 3.0-3.5MPa to be sprayed into the reactor in the form of mist.

[0022] Preferably, the collected carbon black powder is added into the granulator at a constant speed by the feeder, and is stirred by the stirring teeth to form particles with a moisture content of 45%-55% and a diameter of 0.5-2mm.

[0023] Preferably, the wet carbon black particles are dried by the dryer by being contacted with the high-temperature gas generated by the combustion of the tail gas furnace.

[0024] The temperature of the high-temperature gas is about 800-900℃, and the amount of air added is increased, so that the polycyclic aromatic hydrocarbons in the carbon black are secondarily oxidized and decomposed, and the content of aromatic hydrocarbons on the surface of the carbon black is reduced.

[0025] Compared with the prior art, the present application has the beneficial effects of:

[0026] (1) The carbon black is mainly produced by the incomplete combustion and pyrolysis of coal tar at high temperature, and the main component of coal tar is polycyclic aromatic hydrocarbons. If the reaction is not complete, polycyclic aromatic hydrocarbons will usually remain. The method described in the present application uses mixed oil of anthracene oil and ethylene tar as raw material to establish a new combustion model, reduce the specific surface area of carbon black, improve the dispersibility of carbon black, and further reduce the rolling resistance of tires. At the same time, the use of dehydrated tail gas reduces the content of aromatic hydrocarbons. The oxygen content in the atmosphere during the residence stage and the drying stage is increased, and the polycyclic aromatic hydrocarbons on the surface of the carbon black are further oxidized at high temperature, which can effectively reduce the content of polycyclic aromatic hydrocarbons in the product.

[0027] (2) Carbon black production has the characteristics of high energy consumption and high emission, and requires a large amount of coal tar, electricity and water, and produces a large amount of flammable waste gas. In the combustion stage of the present application, the tail gas produced in the production of carbon black is used as fuel after dehydration treatment, which reduces the amount of fuel oil, reduces the amount of waste gas emission, improves the energy utilization rate, and also reduces the content of polycyclic aromatic hydrocarbons in carbon black.

[0028] (3) In the reaction stage, under the shearing action of high-temperature high-speed airflow, the carbon black generated by incomplete combustion and cracking reaction of the raw oil has a lower specific surface area and maintains a certain high structure. Further, when the carbon black is applied in tire production, it can effectively reduce the rolling resistance of the tire, thereby reducing the fuel consumption of the vehicle. The carbon black produced by the present application can be applied not only to high-end environmentally friendly rubber products, but also to green tires.

[0029] (4) In the residence stage, high-temperature air is introduced twice to increase the oxygen content in the flue gas, so that the polycyclic aromatic hydrocarbons on the surface of the carbon black continue to be oxidized and decomposed. In the drying stage, the oxygen content in the drying gas is increased to cause the residual polycyclic aromatic hydrocarbons to be decomposed again. BRIEF DESCRIPTION OF DRAWINGS

[0030] The present application will be further described below in conjunction with the drawings and examples.

[0031] Figure 1 The production process flow chart of the environmentally friendly carbon black for rubber of the present application is shown in the figure,

[0032] Figure 2 The residence stage in the process is shown in the figure,

[0033] Figure 3 The drying stage in the process using direct drying method is shown in the figure,

[0034] Figure 4 The drying stage in the process using indirect drying method is shown in the figure,

[0035] Figure 5 The particle size distribution graph of the carbon black produced by the prior art process is shown in the figure,

[0036] Figure 6 The particle size distribution graph of the carbon black produced by the present application is shown in the figure. DETAILED DESCRIPTION

[0037] Some terms are used in the description and claims to refer to certain components. Those skilled in the art will understand that hardware manufacturers can use different names to refer to the same component. The description and claims of this specification do not distinguish components by name differences, but by functional differences. As mentioned throughout the specification and claims, "comprising" is an open term, which should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range, and those skilled in the art can solve the technical problems within a certain error range, and basically achieve the technical effects.

[0038] In the description of the present application, it is to be understood by the terms "upper", "lower", "front", "back", "left", "right", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0040] The production method of the environmentally friendly carbon black for rubber will be further described in detail below in combination with the drawings, but not as a limitation on the present application.

[0041] Example 1:

[0042] The production method of the environmentally friendly carbon black for rubber comprises the following steps:

[0043] Refining of raw oil: the raw oil containing anthracene oil is removed by sedimentation and centrifugation to remove mechanical impurities in the raw oil, and then the oil product is emulsified by an emulsifying pump;

[0044] The raw oil includes anthracene oil and ethylene tar, and is mixed according to the ratio of anthracene oil: ethylene tar 20%:80%.

[0045] The ethylene tar needs to meet: moisture ≤3.0%, density 1.050g / cm3-1.100g / cm3, 80℃ Engler viscosity ≤9.0, toluene insolubles ≤1.0%, 210℃ distillation (% ) ≤20, 360℃ distillation (% ) ≥70;

[0046] The anthracene oil needs to meet: moisture ≤0.8%, density 1.100g / cm3-1.150g / cm3, 80℃ Engler viscosity ≤1.5, toluene insolubles ≤1.0%, 210℃ distillation (% ) ≤5, 360℃ distillation (% ) ≥55.

[0047] Combustion stage: centrifugal fan produces 19000-20000Nm3 / h of 100-115℃, 87-93kpa air per hour, which is preheated to 900-1000℃ by air preheater, then enters the reaction furnace to burn with fuel and dehydrated tail gas, forming 100-150m / s high-temperature high-speed turbulent flame at 1900-2000℃;

[0048] Fuel oil is mixed with compressed air through a composite oil pipe before being sprayed into the reaction furnace to achieve atomization effect at the front end of the reaction furnace, and the dehydrated tail gas is pressurized to more than 55kpa at the same position and enters the reaction furnace.

[0049] Reaction stage: the mixed raw material oil is placed in the storage tank for 24 hours and heated to 80-90℃ to reduce the viscosity for easy transportation, then pressurized to 3.2-3.5MPa by the raw material oil pump and preheated to more than 220℃ by the raw material oil preheater.

[0050] Then pressurized to 3.0-3.5MPa to be sprayed into the reaction furnace in mist form, subjected to the shearing action of high-temperature high-speed airflow at 1900-2000℃ to generate carbon black through incomplete combustion and cracking reaction of raw material oil;

[0051] Quenching stage: after the reaction stage, the high-temperature flue gas from the reaction stage is reduced to 900-930℃ by spraying cold water to terminate the cracking reaction;

[0052] Residence stage: after the reaction ends in the quenching stage, the flue gas pipeline diameter increases and the flow rate decreases, the quenching water sprayed into the reaction furnace in this stage can fully mix with the carbon black flue gas and gasify, the flue gas enters the air preheater after passing through the residence stage; between the residence stage and the air preheater, 200-500Nm3 / h of 910-980℃ high-temperature air is introduced in reverse to oxidize the carbon black, so that the polycyclic aromatic hydrocarbons on the surface of the carbon black are decomposed again;

[0053] The carbon black treated in the residence stage is collected, granulated and dried.

[0054] The collected carbon black powder is added to the granulator at a constant speed through the feeder, and the stirring teeth are stirred to form particles with moisture content of 45-55% and diameter of 0.5-2mm.

[0055] The granulated wet carbon black particles enter the dryer and are dried by contacting with high-temperature gas generated by burning of tail gas furnace, the temperature of high-temperature gas is about 800-900℃, and the amount of air added is increased at the same time, so that the polycyclic aromatic hydrocarbons in the carbon black are oxidized and decomposed again, reducing the content of aromatic hydrocarbons on the surface of the carbon black.

[0056] Example 2: comprising the following steps:

[0057] Feedstock oil refining: The feedstock oil is anthracene oil and ethylene tar, which are mixed in a ratio of 20%:80%.

[0058] The ethylene tar needs to meet the following requirements: moisture ≤3.0%, density 1.050 g / cm3-1.100 g / cm3, 80°C Engler viscosity ≤9.0, toluene insolubles ≤1.0%, 210°C distillation residue (%) ≤20, 360°C distillation residue (%) ≥70.

[0059] The anthracene oil needs to meet the following requirements: moisture ≤0.8%, density 1.100 g / cm3-1.150 g / cm3, 80°C Engler viscosity ≤1.5, toluene insolubles ≤1.0%, 210°C distillation residue (%) ≤5, 360°C distillation residue (%) ≥55.

[0060] The anthracene oil and ethylene tar are mixed in the required ratio, and the mechanical impurities in the feedstock oil are removed by sedimentation and centrifugation. At the same time, the oil is emulsified by an emulsifying pump to improve the purity and uniformity of the feedstock oil.

[0061] Combustion stage: The centrifugal fan produces 19000-20000 Nm3 / h of 110°C, 90kpa air per hour, which is preheated to 950°C by an air preheater and enters the reaction furnace to mix with the fuel.

[0062] The main fuel of this method is light coal tar, and the auxiliary fuel is the dewatering tail gas of carbon black production. The fuel oil is mixed with compressed air before being sprayed out through a composite oil pipe at the front end of the reaction furnace to achieve atomization, and is sprayed into the reaction furnace; the dewatering tail gas is pressurized to 60kpa through 8 DN80 pipelines at the same position and enters the reaction furnace. The atomized fuel oil and dewatering tail gas are mixed with high-temperature air at 950°C to form a high-temperature high-speed turbulent flame of 1900-2000°C and 100-150 m / s, establishing a new combustion model.

[0063] The use of dewatering tail gas reduces the amount of fuel oil, reducing the content of polycyclic aromatic hydrocarbons in carbon black.

[0064] Reaction stage: The mixed feedstock oil is left to stand in the storage tank for 24 hours and heated to 85°C to reduce the viscosity for easy transportation. The feedstock oil is pressurized to 3.5MPa by a feedstock oil pump, preheated to about 230°C by a feedstock oil preheater, and reaches the front zone of the furnace.

[0065] Ten atomizing oil nozzles are used, which are evenly arranged in the cross-sectional direction of the reaction furnace, and are sprayed into the furnace in a mist state at a pressure of 3.3MPa. The high-temperature high-speed airflow at 1900-2000°C shears the feedstock oil, causing incomplete combustion and pyrolysis to generate carbon black with a relatively low specific surface area and a certain high structure.

[0066] Reaction stage, by shearing effect reduces the specific surface area of carbon black, and then when carbon black is applied to tire production, can effectively reduce the rolling resistance of tire, and then reduce the vehicle fuel consumption.

[0067] Quenching stage: after the reaction stage, the high temperature flue gas from the reaction stage is reduced to about 920 degrees Celsius by spraying cold water, and the cracking reaction is terminated.

[0068] Residence stage: after the quenching stage, the reaction is completed, the flue gas pipeline diameter increases and the flow rate decreases, and the quenching water sprayed into the reaction furnace can be fully mixed with the carbon black flue gas and gasified in this stage, and the flue gas enters the air preheater after passing through the residence section; between the residence section and the air preheater, 200-500Nm3 / h of 950℃ high temperature air is introduced in reverse spray method for the second time, and the carbon black is oxidized to make the polycyclic aromatic hydrocarbon on the surface of the carbon black decompose again.

[0069] Collection stage: this stage is a physical process, carbon black is filtered out by a bag-type dust collector and separated from the tail gas, and the carbon black is transported by a pipeline and stored in a powdery carbon black storage tank.

[0070] Granulation stage: the granulator has a rotor filled with stirring teeth, and the carbon black powder is added into the granulator at a constant speed through a feeder. Water and liquid lignin are uniformly mixed by a static mixer in advance to form granulation water, which is added into the granulator at the front end of the granulator. The granulation water is mixed with the carbon black powder, and the stirring teeth are stirred to form particles with a moisture content of 45%-55% and a diameter of 0.5-2mm.

[0071] By comparison with the prior art, Figure 4 and the comparison of the prior art, Figure 5 It can be seen that the particle size distribution of the present application is wide, the dispersibility is better than that of the traditional process, it is easier to mix with rubber, and the processing performance is improved.

[0072] Drying stage: the wet carbon black particles after granulation enter the dryer and are contacted with high-temperature gas generated by the combustion of tail gas furnace for drying. Low-temperature combustion technology is adopted in the drying stage, the amount of air added is increased, and the air to tail gas ratio is increased to 0.55, so that the combustible components in the tail gas can be completely burned, and the temperature of the residual gas of the tail gas furnace is controlled at about 800-900 degrees Celsius, the oxygen content in the residual gas is increased, the polycyclic aromatic hydrocarbons in the carbon black are oxidized and decomposed again, and the content of aromatic hydrocarbons on the surface of the carbon black is reduced. After drying, the temperature of the carbon black reaches 200℃, and the moisture content is reduced to below 0.2%.

[0073] Lifting and storage stage: the carbon black discharged from the dryer is transported into the finished product storage tank by the bucket elevator and the conveying screw.

[0074] The higher the oil absorption value of the carbon black, the higher the structure, and the better the tire wear resistance. The lower the specific surface area of the carbon black, the wider the particle size distribution, and the better the dispersibility of the carbon black in rubber. The rolling resistance of the tire tread rubber is related to the 60℃ loss factor tan delta of the carbon black filled rubber, the smaller the loss factor, the smaller the rolling resistance, and the smaller the fuel consumption and pollution of the automobile.

[0075] The carbon black produced by the present application has great improvement in oil absorption value, specific surface area, loss factor and polycyclic aromatic hydrocarbon parameters compared with the carbon black produced by the existing production process, and the comparison is as follows:

[0076]

[0077] The polycyclic aromatic hydrocarbon content in the carbon black produced by the present method is detected, and the detection results are as follows:

[0078]

[0079]

[0080] From the above detection results, it can be seen that the content of cyclic aromatic hydrocarbons in the carbon black produced by the present method is very low, which meets the standard and can be used as environmental protection carbon black.

[0081] Example 3:

[0082] The differences between this example and example 2 are as follows:

[0083] (1) In the combustion stage, the amount of oxygen added is increased by mixing compressed air with fuel to crack polycyclic aromatic hydrocarbons, and natural gas is used as fuel.

[0084] (2) In the drying stage, the indirect drying technology is used to reduce the content of aromatic hydrocarbons on the surface of the carbon black. The ratio of air to tail gas entering the tail gas combustion furnace is controlled at 0.50, the temperature of the residual gas is 1000℃, the residual gas enters the dryer, and the residual gas is isolated from the wet particles of carbon black by the inner sleeve to achieve the purpose of indirect drying. By isolating the wet particles of carbon black from the residual gas directly through indirect drying, the content of aromatic hydrocarbons on the surface of the carbon black is effectively reduced.

[0085] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present application.

Claims

1. A method for producing environmentally friendly carbon black for rubber, characterized in that: Raw material oil refining: The raw material oil containing anthracene oil is subjected to sedimentation and centrifugation to remove mechanical impurities, and then the oil is emulsified by an emulsification pump; Combustion stage: The air generated by the centrifugal fan is preheated to 900℃-1000℃ by the air preheater and then enters the reactor to mix and burn with fuel and dehydrated exhaust gas to form a high-temperature, high-speed turbulent flame of 100-150m / s at 1900-2000℃. During the combustion stage, fuel oil is mixed with compressed air through a composite oil pipe at the very front of the reactor to achieve atomization before being injected into the reactor. Reaction stage: The mixed feedstock oil is left to stand in the storage tank for 24 hours and heated to 80℃-90℃ to reduce viscosity for easier transportation. It is then pressurized to 3.2-3.5MPa by the feedstock oil pump and preheated to above 220℃ in the feedstock oil preheater. After that, it is pressurized and heated and sprayed into the reaction furnace in a mist form. Under the shearing action of the high temperature and high speed airflow of 1900-2000℃, the feedstock oil undergoes incomplete combustion and cracking reaction to generate carbon black. Rapid cooling stage: After the reaction stage, cold water is injected to reduce the high temperature flue gas from the reaction stage to between 900℃ and 930℃, thereby terminating the pyrolysis reaction; Residence stage: After the rapid cooling stage, the reaction ends, the inner diameter of the flue gas duct increases and the flow velocity decreases. In this stage, the rapid cooling water injected into the reactor can be fully mixed with the carbon black flue gas and vaporized. After passing through the residence stage, the flue gas enters the air preheater. Between the residence section and the air preheater, a secondary injection of 200-500 Nm³ is used. 3 High-temperature air at 910℃-980℃ per hour oxidizes the carbon black, causing the polycyclic aromatic hydrocarbons on the surface of the carbon black to decompose again. The carbon black after the residence stage is collected, granulated, and dried. During the drying stage, the ratio of air to exhaust gas introduced into the tail gas combustion furnace is controlled at 0.50, and the temperature of the residual combustion gas is 1000℃. The residual combustion gas enters the dryer, where it is separated from the wet carbon black particles by the inner sleeve, achieving the purpose of indirect drying to reduce the aromatic content on the surface of the carbon black. The feedstock oils include anthracene oil and ethylene tar. Ethylene tar must meet the following requirements: moisture content ≤ 3.0%, density 1.050 g / cm³. 3 -1.100g / cm 3 Engler viscosity at 80℃ ≤ 9.0, toluene insolubles ≤ 1.0%, fraction before 210℃ (%) ≤ 20, fraction before 360℃ (%) ≥ 70; Anthracene oil must meet the following requirements: moisture content ≤ 0.8%, density 1.100 g / cm³. 3 -1.150g / cm 3 Engler viscosity at 80℃ ≤ 1.5, toluene insolubles ≤ 1.0%, fraction before 210℃ (%) ≤ 5, fraction before 360℃ (%) ≥ 55; The carbon black produced using the aforementioned method for producing environmentally friendly carbon black for rubber has a reduced specific surface area to 116 × 10⁻⁶. 3 m 2 / kg, polycyclic aromatic hydrocarbons were reduced to 0.5ppm, and the loss factor tanδ at 60℃ after carbon black was filled into tire tread compound was 0.1145.

2. The method for producing environmentally friendly carbon black for rubber according to claim 1, characterized in that: The raw material oil is blended according to the ratio of anthracene oil to ethylene tar of 20% to 80%.

3. The method for producing environmentally friendly carbon black for rubber according to claim 1 or 2, characterized in that: During the combustion stage, the centrifugal fan generates 19,000-20,000 Nm³ per hour. 3 Wind speed of 100℃-115℃ and 87-93kPa per hour.

4. The method for producing environmentally friendly carbon black for rubber according to claim 3, characterized in that: The dehydrated exhaust gas is pressurized to greater than 55 kPa at the same location and then enters the reactor.

5. The method for producing environmentally friendly carbon black for rubber according to claim 1, characterized in that: During the reaction stage, the feedstock oil pressure is controlled at 3.0-3.5 MPa and sprayed into the reactor in a mist form.

6. The method for producing environmentally friendly carbon black for rubber according to claim 1, 2, 4, or 5, characterized in that: The collected carbon black powder is fed into the granulator at a constant speed through a feeder, and is stirred by the stirring teeth to form granules with a moisture content of 45%-55% and a diameter of 0.5-2mm.

7. The method for producing environmentally friendly carbon black for rubber according to claim 6, characterized in that: The granulated wet carbon black particles enter a dryer and are dried by contact with the high-temperature gas generated during combustion in the tail gas furnace. The high-temperature gas temperature is 800-900 degrees Celsius. At the same time, the amount of air added is increased, which allows the polycyclic aromatic hydrocarbons in the carbon black to undergo secondary oxidation and decomposition, reducing the aromatic hydrocarbon content on the surface of the carbon black.

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