CN113913034A - Process for producing soft carbon black by oil furnace method hard reaction furnace - Google Patents
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- 239000006229 carbon black Substances 0.000 title claims abstract description 114
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 93
- 229910021384 soft carbon Inorganic materials 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000002485 combustion reaction Methods 0.000 claims abstract description 61
- 238000010791 quenching Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000000171 quenching effect Effects 0.000 claims abstract description 31
- 239000000446 fuel Substances 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005336 cracking Methods 0.000 claims abstract description 9
- 239000003546 flue gas Substances 0.000 claims abstract description 9
- 230000035484 reaction time Effects 0.000 claims abstract description 3
- 239000003921 oil Substances 0.000 claims description 75
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims description 16
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 10
- 239000005977 Ethylene Substances 0.000 claims description 10
- 239000011269 tar Substances 0.000 claims description 10
- 238000002309 gasification Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 238000007670 refining Methods 0.000 claims description 7
- 239000011280 coal tar Substances 0.000 claims description 6
- 238000004523 catalytic cracking Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims description 2
- 230000003179 granulation Effects 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 229910021385 hard carbon Inorganic materials 0.000 abstract description 7
- 238000004939 coking Methods 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract description 2
- 239000002918 waste heat Substances 0.000 description 21
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 239000000779 smoke Substances 0.000 description 15
- 239000007787 solid Substances 0.000 description 15
- 238000007689 inspection Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000008400 supply water Substances 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 206010021143 Hypoxia Diseases 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- LTUJKAYZIMMJEP-UHFFFAOYSA-N 9-[4-(4-carbazol-9-yl-2-methylphenyl)-3-methylphenyl]carbazole Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(C=2C(=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C)C(C)=C1 LTUJKAYZIMMJEP-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/48—Carbon black
- C09C1/50—Furnace black ; Preparation thereof
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The invention discloses a process for producing soft carbon black by an oil furnace method hard reaction furnace, wherein fuel is sprayed into a combustion chamber of the hard furnace to be mixed and combusted with high-temperature air, the fuel quantity is set according to 1550-1700 ℃ of a combustion model, and sufficient and stable steam is sprayed simultaneously to form high-temperature and high-speed airflow meeting the soft carbon black generation condition together with combusted gas; raw oil meeting the condition of air-oil ratio is radially sprayed into a reaction furnace throat, and is mixed with the high-temperature high-speed gas flow to rapidly generate a series of chemical reactions such as incomplete combustion, cracking and the like to generate carbon black flue gas; after a proper reaction time, spraying quenching water into a quenching section of the reaction furnace to terminate the reaction, thereby obtaining the soft carbon black. The steam is introduced into the combustion chamber, on one hand, the furnace temperature is adjusted to a proper temperature, on the other hand, the gas flow velocity in the hearth is increased, the air-oil ratio is improved, coking is not easy to form in the furnace, and the continuous production is ensured. The process can be applied to oil furnace method hard carbon black production lines with annual output of 2.0 ten thousand tons and above.
Description
Technical Field
The invention relates to the technical field of carbon black production, in particular to a process for producing soft carbon black by an oil furnace method hard reaction furnace.
Background
The carbon black is a product generated by hydrocarbon substances in oxygen deficiency combustion, the air-oil ratio is low, the oxygen deficiency is less, the generated carbon black is hard carbon black, and conversely, the air-oil ratio is low, the oxygen deficiency is more, and the generated carbon black is soft carbon black. However, the low air-oil ratio easily causes coking in a hearth, so that production is difficult, and simultaneously, the low air-oil ratio can cause incomplete reaction of raw oil, so that excessive oil films are adhered to the surface of carbon black to influence the quality of the carbon black. Therefore, in order to normally produce soft carbon black, only a special soft reaction furnace is used to solve the above problems to maintain normal production and ensure the quality of carbon black.
As the usage amount of the soft carbon black only accounts for about 25 percent of the usage amount of the hard carbon black, the problem of market and benefit balance can be faced when the soft carbon black production line is specially built for medium and small enterprises, in order to not lose the market of the soft carbon black, a plurality of enterprises can only build two hard and soft reaction furnaces on one production line at the same time, but one more furnace needs to be built to increase the investment of more than 500 ten thousand yuan, and the production process of hard and soft varieties can be completed only after production is stopped, so that the production cost is increased.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the process for producing the soft carbon black by the oil furnace method hard reaction furnace is provided, so that the hard carbon black and the soft carbon black can be produced by one production line without respectively building the soft reaction furnace and the hard reaction furnace, production stop is not needed in the production transfer process, and the investment cost and the production cost are greatly saved.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a process for producing soft carbon black by an oil furnace method hard reaction furnace comprises the following steps:
spraying fuel into a combustion chamber of the hard furnace, mixing the fuel with high-temperature air, and combusting, wherein the fuel quantity is set according to the temperature of a combustion model of 1550-1700 ℃, and simultaneously spraying sufficient stable steam into the combustion chamber to form high-temperature high-speed airflow meeting the soft carbon black generation condition together with the combusted fuel;
raw oil meeting the air-oil ratio condition is uniformly sprayed at a throat of a reaction furnace, and is mixed with high-temperature high-speed airflow generated by combustion in a combustion chamber to generate a series of chemical reactions such as incomplete combustion, cracking and the like, so that carbon black flue gas is generated;
after a proper reaction time, spraying quenching water into a quenching section of the reaction furnace to stop the reaction, thereby obtaining the soft carbon black.
The steam is axially sprayed into the combustion chamber from the front of the reaction furnace, can be independently sprayed, and can also be sprayed after being mixed with fuel.
The steam is introduced according to different capacities and varieties, and the introduction amount of 2.0-6.0 ten thousand tons of annual production of the production line is 100-500 kg/h.
The fuel comprises at least one of ethylene tar, coal tar, anthracene oil, carbon black oil, catalytic cracking clarified oil, natural gas and coke oven gas.
The raw oil comprises at least one of coal tar, anthracene oil, carbon black oil, ethylene tar and catalytic cracking clarified oil.
The hard furnace is a horizontal furnace and comprises a combustion section, a throat pipe, a reaction section, a quenching section and a gasification section which are sequentially communicated through pipelines.
The condition of meeting the air-oil ratio, namely the air-oil ratio of the high-temperature air to the raw oil is not less than 1.45.
The temperature of the high-temperature air is 650-800 ℃.
And the soft carbon black is subjected to heat exchange, cooling, collection, granulation, drying, refining and packaging to obtain a soft carbon black finished product.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the process for producing the soft carbon black by using the oil furnace method hard reaction furnace comprises the following steps of spraying fuel into a combustion chamber of the reaction furnace to be mixed and combusted with high-temperature air, and controlling the temperature of a combustion model in the combustion chamber to be 1550-1700 ℃; axially spraying steam into the combustion chamber from the front of the reaction furnace, and forming high-temperature and high-speed airflow together with the combusted fuel; raw oil meeting the condition of air-oil ratio is radially sprayed into a reaction furnace throat, and is mixed with the high-temperature high-speed gas flow to rapidly generate a series of chemical reactions such as incomplete combustion, cracking and the like to generate carbon black flue gas; and (3) spraying quenching water into a quenching section of the reaction furnace to terminate the reaction, thereby obtaining the soft carbon black. The reaction temperature and the air flow speed are controlled by adjusting the fuel quantity and the steam quantity, so that the production conditions of different varieties and yields of soft carbon black can be met. The steam is introduced into the combustion chamber, on one hand, the furnace temperature is adjusted to a proper temperature, on the other hand, the gas flow velocity in the hearth is increased, the air-oil ratio is increased, coking is not easy to form in the furnace, continuous production is ensured, one production line can produce hard carbon black and soft carbon black without investing two hard and soft reaction furnaces, and the mutual production conversion process of the soft carbon black and the hard carbon black does not need to stop production. The consumption for producing soft N500 and N600 series products is less than that for producing hard N300 series products by more than 100kg/T of raw oil, that is, the benefit for producing soft carbon black is far higher than that for producing hard carbon black, and the economic benefit is very obvious.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a flow chart of a process for producing soft carbon black in an oil furnace hard reaction furnace according to an embodiment of the present invention;
wherein: 1-a raw oil pump; 2-a fuel pump; 3-a main air supply fan; 4-process water pump; 5-a combustion section; 6-throat pipe; 7-reaction section; 8-a quenching section; 9-a gasification section; 10-an air preheater; 11-an on-line waste heat boiler; 12-boiler feed water pump; 13-a steam pipe network; 14-raw oil preheating pipe; 15-collection unit.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
Example 1
A process for producing N660 soft carbon black by an oil furnace method hard reaction furnace comprises the following steps:
1. the reaction furnace is a four-million-ton hard horizontal furnace and comprises a combustion section 5, a throat 6, a reaction section 7, a quenching section 8 and a gasification section 9 which are connected in sequence.
2. Fuel oil is pressurized by a fuel pump 2 and then radially sprayed into an inner cavity of a combustion section 5 of the hard reaction furnace, namely a combustion chamber, is pressurized by a main air supply fan 3, is preheated by an air preheater 10, enters the combustion section 5, is mixed and combusted by high-temperature air with the temperature of 700 ℃, the combustion temperature in the combustion chamber is controlled to be 1600 ℃, the fuel is ethylene tar, the adding amount of the ethylene tar is 600kg/h, and the introducing amount of the high-temperature air is 14700Nm3/h。
3. And (3) axially spraying steam into the combustion chamber from the front of the reaction furnace, and forming high-temperature and high-speed airflow together with combusted gas, wherein the introduction amount of the steam is 403 kg/h.
4. Raw oil is pressurized by a raw oil pump 1, enters a raw oil preheating pipe 14, is heated and then is radially sprayed into a reaction furnace throat 6, and is mixed with the high-temperature high-speed gas flow to rapidly generate a series of chemical reactions such as incomplete combustion, cracking and the like to generate carbon black smoke, wherein the raw oil is anthracene oil, and the adding amount of the anthracene oil is 9000 kg/h.
5. Primary quenching water is sprayed into the quenching section 8 of the reaction furnace to terminate the reaction, and soft carbon black smoke is obtained. The quench water is obtained by pressurizing clear water by a process water pump 4.
6. The soft carbon black smoke passes through an air preheater 10 and an online waste heat boiler 11 for cooling, and then enters a collecting unit 15 for gas-solid separation after secondary quenching to control the temperature to be about 280 ℃ so as to obtain solid powdery N660 soft carbon black.
7. And granulating, drying, refining and packaging the solid powdery N660 soft carbon black to obtain the N660 soft carbon black product.
The heat of the soft carbon black flue gas can be used as a heat source for preheating air by the air preheater 10, meanwhile, redundant heat can be used for heating the online waste heat boiler 11, generated steam reaches the steam pipe network 13 for utilization, and softened water is pumped into the online waste heat boiler 11 through the boiler water supply pump 12 to supply water to the online waste heat boiler.
147 tons of N660 soft carbon black are produced in the example per day, the yield is 1.57 tons of oil/ton of carbon, the light transmittance of toluene reaches 83 percent, and a product quality inspection report is shown in the table I.
Example 2
A process for producing N660 soft carbon black by an oil furnace method hard reaction furnace comprises the following steps:
1. the reaction furnace is a four-million-ton hard horizontal furnace and comprises a combustion section 5, a throat 6, a reaction section 7, a quenching section 8 and a gasification section 9 which are connected in sequence.
2. Fuel oil is pressurized by a fuel pump 2 and then radially sprayed into a combustion chamber of a hard reaction furnace, is pressurized by a main air supply fan 3, is preheated by an air preheater 10, enters a combustion section 5, is mixed and combusted by high-temperature air at 705 ℃, the combustion temperature in the combustion chamber is controlled at 1600 ℃, the fuel is anthracene oil, the adding amount of the anthracene oil is 597kg/h, and the introducing amount of the high-temperature air is 14700Nm3/h。
3. And (3) axially spraying steam into the combustion chamber from the front of the reaction furnace, and forming high-temperature and high-speed airflow together with combusted gas, wherein the steam introduction amount is 392 kg/h.
4. Raw oil is pressurized by a raw oil pump 1, enters a raw oil preheating pipe 14, is heated and then is radially sprayed into a reaction furnace throat 6, and is mixed with the high-temperature high-speed gas flow to rapidly generate a series of chemical reactions such as incomplete combustion, cracking and the like to generate carbon black smoke, wherein the raw oil is carbon black oil, and the adding amount of the carbon black oil is 9200 kg/h.
5. Primary quenching water is sprayed into the quenching section 8 of the reaction furnace to terminate the reaction, and soft carbon black smoke is obtained. The quench water is obtained by pressurizing clear water by a process water pump 4.
6. The soft carbon black smoke passes through an air preheater 10 and an online waste heat boiler 11 for cooling, and then enters a collecting unit 15 for gas-solid separation after secondary quenching to control the temperature to be about 280 ℃ so as to obtain solid powdery N660 soft carbon black.
7. And granulating, drying, refining and packaging the solid powdery N660 soft carbon black to obtain the N660 soft carbon black product.
The heat of the soft carbon black flue gas can be used as a heat source for preheating air by the air preheater 10, meanwhile, redundant heat can be used for heating the online waste heat boiler 11, generated steam reaches the steam pipe network 13 for utilization, and softened water is pumped into the online waste heat boiler 11 through the boiler water supply pump 12 to supply water to the online waste heat boiler.
In this example, 153.7 tons of N660 soft carbon black are produced per day, the yield is 1.53 tons of oil/ton of carbon, the transmittance of toluene reaches 81%, and the product quality inspection report is shown in Table I.
Example 3
A process for producing N550 soft carbon black by an oil furnace method hard reaction furnace comprises the following steps:
1. the reaction furnace is a four-million-ton hard horizontal furnace and comprises a combustion section 5, a throat 6, a reaction section 7, a quenching section 8 and a gasification section 9 which are connected in sequence.
2. Fuel oil is pressurized by a fuel pump 2 and then radially sprayed into a combustion section 5 of the hard reaction furnace, is pressurized by a main air supply fan 3, is preheated by an air preheater 10, enters the combustion section 5, is mixed and combusted by high-temperature air with the temperature of 670 ℃, the combustion temperature in the combustion chamber is controlled to be 1680 ℃, the fuel is ethylene tar, wherein the adding amount of the ethylene tar is 625kg/h, and the amount of high-temperature air introduced is 13800Nm3/h。
3. And (3) axially spraying steam into the combustion chamber from the front of the reaction furnace, and forming high-temperature and high-speed airflow together with combusted gas, wherein the introduction amount of the steam is 300 kg/h.
4. Raw oil is pressurized by a raw oil pump 1, enters a raw oil preheating pipe 14, is heated and then is radially sprayed into a reaction furnace throat 6, and is mixed with the high-temperature high-speed gas flow to rapidly generate a series of chemical reactions such as incomplete combustion, cracking and the like to generate carbon black smoke, wherein the raw oil is carbon black oil, and the adding amount of the carbon black oil is 9000 kg/h.
5. Primary quenching water is sprayed into the quenching section 8 of the reaction furnace to terminate the reaction, and soft carbon black smoke is obtained. The quench water is obtained by pressurizing clear water by a process water pump 4.
6. The soft carbon black smoke passes through an air preheater 10 and an on-line waste heat boiler 11 for cooling, and then enters a collecting unit 15 for gas-solid separation after secondary quenching to control the temperature to be about 280 ℃ so as to obtain solid powdery N550 soft carbon black.
7. And granulating, drying, refining and packaging the solid powdery N550 soft carbon black to obtain the N550 soft carbon black product.
The heat of the soft carbon black flue gas can be used as a heat source for preheating air by the air preheater 10, meanwhile, redundant heat can be used for heating the online waste heat boiler 11, generated steam reaches the steam pipe network 13 for utilization, and softened water is pumped into the online waste heat boiler 11 through the boiler water supply pump 12 to supply water to the online waste heat boiler.
In this example, 149.7 tons of N550 soft carbon black are produced per day, the yield is 1.543 tons of oil/ton of carbon, the transmittance of toluene is 84%, and the quality inspection report of the product is shown in Table II.
Example 4
A process for producing N550 soft carbon black by an oil furnace method hard reaction furnace comprises the following steps:
1. the reaction furnace is a four-million-ton hard horizontal furnace and comprises a combustion section 5, a throat 6, a reaction section 7, a quenching section 8 and a gasification section 9 which are connected in sequence.
2. The fuel oil is pressurized by a fuel pump 2 and then radially sprayed into a combustion section 5 of the hard reaction furnace and passes through main air supplyPressurizing the machine 3, preheating the mixture by an air preheater 10, mixing and burning the high-temperature air with the temperature of 710 ℃ entering the burning section 5, controlling the burning temperature in the burning chamber to be 1680 ℃, wherein the fuel is coal tar, the adding amount of the coal tar is 619kg/h, and the introducing amount of the high-temperature air is 13800Nm3/h。
3. And (3) axially spraying steam into the combustion chamber from the front of the reaction furnace, and forming high-temperature and high-speed airflow together with combusted gas, wherein the introduction amount of the steam is 303 kg/h.
4. Raw oil is pressurized by a raw oil pump 1, enters a raw oil preheating pipe 14, is heated and then is radially sprayed into a reaction furnace throat 6, and is mixed with the high-temperature high-speed gas flow to rapidly generate a series of chemical reactions such as incomplete combustion, cracking and the like to generate carbon black smoke, wherein the raw oil is carbon black oil, and the adding amount of the carbon black oil is 9000 kg/h.
5. Primary quenching water is sprayed into the quenching section 8 of the reaction furnace to terminate the reaction, and soft carbon black smoke is obtained. The quench water is obtained by pressurizing clear water by a process water pump 4.
6. The soft carbon black smoke passes through an air preheater 10 and an on-line waste heat boiler 11 for cooling, and then enters a collecting unit 15 for gas-solid separation after secondary quenching to control the temperature to be about 278 ℃, so as to obtain solid powdery N550 soft carbon black.
7. And granulating, drying, refining and packaging the solid powdery N550 soft carbon black to obtain the N550 soft carbon black product.
The heat of the soft carbon black flue gas can be used as a heat source for preheating air by the air preheater 10, meanwhile, redundant heat can be used for heating the online waste heat boiler 11, generated steam reaches the steam pipe network 13 for utilization, and softened water is pumped into the online waste heat boiler 11 through the boiler water supply pump 12 to supply water to the online waste heat boiler.
In this example, 149.0 tons of N550 soft carbon black are produced per day, the yield is 1.549 tons of oil/ton of carbon, the transmittance of toluene is 83%, and the product quality inspection report is shown in Table II.
Example 5
A process for producing N550 soft carbon black by an oil furnace method hard reaction furnace comprises the following steps:
1. the reaction furnace is a four-million-ton hard horizontal furnace and comprises a combustion section 5, a throat 6, a reaction section 7, a quenching section 8 and a gasification section 9 which are connected in sequence.
2. Fuel oil is pressurized by a fuel pump 2 and then radially sprayed into a combustion section 5 of the hard reaction furnace, is pressurized by a main air supply fan 3, is preheated by an air preheater 10, enters the combustion section 5, is mixed and combusted by high-temperature air at the temperature of 670 ℃, the combustion temperature in the combustion chamber is controlled to be 1680 ℃, the fuel is ethylene tar, wherein the adding amount of the ethylene tar is 530kg/h, and the introducing amount of the high-temperature air is 12000Nm3/h。
3. And (3) axially spraying steam into the combustion chamber from the front of the reaction furnace, and forming high-temperature and high-speed airflow together with combusted gas, wherein the introduction amount of the steam is 290 kg/h.
4. Raw oil is pressurized by a raw oil pump 1, enters a raw oil preheating pipe 14, is heated and then is radially sprayed into a reaction furnace throat 6, and is mixed with the high-temperature high-speed airflow to rapidly generate a series of chemical reactions such as incomplete combustion, cracking and the like to generate carbon black smoke, wherein the raw oil is carbon black oil, and the adding amount of the carbon black oil is 8500 kg/h.
5. Primary quenching water is sprayed into the quenching section 8 of the reaction furnace to terminate the reaction, and soft carbon black smoke is obtained. The quench water is obtained by pressurizing clear water by a process water pump 4.
6. The soft carbon black smoke passes through an air preheater 10 and an on-line waste heat boiler 11 for cooling, and then enters a collecting unit 15 for gas-solid separation after secondary quenching to control the temperature to be about 280 ℃ so as to obtain solid powdery N550 soft carbon black.
7. And granulating, drying, refining and packaging the solid powdery N550 soft carbon black to obtain the N550 soft carbon black product.
The heat of the soft carbon black flue gas can be used as a heat source for preheating air by the air preheater 10, meanwhile, redundant heat can be used for heating the online waste heat boiler 11, generated steam reaches the steam pipe network 13 for utilization, and softened water is pumped into the online waste heat boiler 11 through the boiler water supply pump 12 to supply water to the online waste heat boiler.
In this example, 142.8 tons of N550 soft carbon black are produced per day, the yield is 1.518 tons of oil/ton of carbon, the transmittance of toluene is 71%, and the product quality inspection report is shown in Table II.
TABLE-N660 example quality inspection report GB3778-2003
| Inspection item | Technical index | Example 1 | Example 2 |
| Iodine absorption number | 36±5 | 36.1 | 37 |
| DBP absorption number | 90±5 | 91.0 | 90 |
| CDBP absorption value | 69～79 | 76 | 75.5 |
| STSA | 29～39 | 35.9 | 36.1 |
| BET | 30～40 | 36.4 | 36.6 |
| Heating decrement | ≤1.5 | 0.09 | 0.012 |
| Ash content | ≤0.7 | 0.21 | 0.25 |
| 45 micron sieve residue | ≤0.10 | 0.012 | 0.018 |
| 500 micron sieve residue | ≤0.001 | 0.0003 | 0.0003 |
| Impurities | Is free of | Is free of | Is free of |
| Content of fine powder | ≤10 | 1.7 | 1.0 |
| Stress at definite elongation | -2.2±1.5 | -2.0 | -1.6 |
TABLE II N550 example quality inspection report GB3778-2003
As can be seen from the above examples 1 to 5 and tables i and ii, as long as the process is not changed greatly, especially the ratio of the air amount to the raw material oil amount is not changed greatly, even if the fuel or the raw material oil is changed, the product quality is stable, which indicates that the process reproducibility of the present invention is very good. The produced soft carbon black has indexes all reaching the national standard GB/T3780 and completely meeting the use technical requirements of rubber products such as tires and the like. The yield of the product is high, and the economic benefit is considerable.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (9)
1. A process for producing soft carbon black by an oil furnace method hard reaction furnace is characterized by comprising the following steps:
spraying fuel into a combustion chamber of the hard furnace, mixing the fuel with high-temperature air, and combusting, wherein the fuel quantity is set according to the temperature of a combustion model of 1550-1700 ℃, and simultaneously spraying sufficient stable steam into the combustion chamber to form high-temperature high-speed airflow meeting the soft carbon black generation condition together with the combusted fuel;
raw oil meeting the air-oil ratio condition is uniformly sprayed at a throat of a reaction furnace, and is mixed with high-temperature high-speed airflow generated by combustion in a combustion chamber to generate a series of chemical reactions such as incomplete combustion, cracking and the like, so that carbon black flue gas is generated;
after a proper reaction time, spraying quenching water into a quenching section of the reaction furnace to stop the reaction, thereby obtaining the soft carbon black.
2. The process for producing soft carbon black in an oil furnace hard reaction furnace according to claim 1, wherein: the steam is axially sprayed into the combustion chamber from the front of the reaction furnace, and the steam is independently sprayed or is mixed with fuel and then sprayed.
3. The process for producing soft carbon black in an oil furnace hard reaction furnace according to claim 1, wherein: the steam is introduced in an amount of 100-500 kg/h, so that the yield of 2.0-6.0 ten thousand tons per year of the production line and different varieties can be met.
4. The process for producing soft carbon black in an oil furnace hard reaction furnace according to claim 1, wherein: the fuel comprises at least one of ethylene tar, coal tar, anthracene oil, carbon black oil, catalytic cracking clarified oil, natural gas and coke oven gas.
5. The process for producing soft carbon black in an oil furnace hard reaction furnace according to claim 1, wherein: the raw oil comprises at least one of coal tar, anthracene oil, carbon black oil, ethylene tar and catalytic cracking clarified oil.
6. The process for producing soft carbon black in an oil furnace hard reaction furnace according to claim 1, wherein: the hard furnace is a horizontal furnace and comprises a combustion section, a throat pipe, a reaction section, a quenching section and a gasification section which are sequentially communicated through pipelines.
7. The process for producing soft carbon black in an oil furnace hard reaction furnace according to claim 1, wherein: the condition of meeting the air-oil ratio, namely the air-oil ratio of the high-temperature air to the raw oil is not less than 1.45.
8. The process for producing soft carbon black in an oil furnace hard reaction furnace according to claim 1, wherein: the temperature of the high-temperature air is 650-800 ℃.
9. The process for producing soft carbon black in an oil furnace hard reaction furnace according to claim 1, wherein: and the soft carbon black is subjected to heat exchange, cooling, collection, granulation, drying, refining and packaging to obtain a soft carbon black finished product.
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| CN115322593A (en) * | 2022-07-04 | 2022-11-11 | 广州海印新材料研究发展有限公司 | Carbon black for rubber products and preparation method and application thereof |
| CN115678318A (en) * | 2022-09-06 | 2023-02-03 | 嘉峪关大友嘉能精碳科技股份有限公司 | Metal structure carbon black reaction furnace and carbon black production method |
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