CN113549346A - Production process of special carbon black - Google Patents
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- CN113549346A CN113549346A CN202110952358.4A CN202110952358A CN113549346A CN 113549346 A CN113549346 A CN 113549346A CN 202110952358 A CN202110952358 A CN 202110952358A CN 113549346 A CN113549346 A CN 113549346A
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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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- 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
- C09C1/56—Treatment of carbon black ; Purification
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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
- C09C1/56—Treatment of carbon black ; Purification
- C09C1/60—Agglomerating, pelleting, or the like by dry methods
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention discloses a production process of special carbon black, which comprises the following steps: (1) preheating air; (2) preheating raw materials; (3) carrying out reaction; (4) heat exchange and temperature reduction; (5) receiving materials; (6) air conveying; (7) granulating; (8) grading; (9) post-treatment; (10) and packaging and warehousing the finished product. The production process of the carbon black has the advantages of environmental protection, energy conservation and consumption reduction, and the carbon black prepared by the production process can meet the performance requirements of the carbon black while the carbon black is environment-friendly, energy-saving and consumption reduction; the invention achieves the purposes of energy saving and consumption reduction by changing the granulation mode of the carbon black and the cooling mode of the carbon black and the flue gas; the purpose of environmental protection is achieved by changing the treatment mode of tail gas and dust generated in the production process of the carbon black.
Description
Technical Field
The invention relates to the technical field of carbon black production, in particular to a production process of special carbon black.
Background
Currently, the economic development of China is in a phase which is changing day by day, and along with the gradual increase of the environmental protection requirement of the chemical industry, higher requirements are put forward on the supply level of the production quantity of the carbon black and the production process.
Carbon black, also known as carbon black, is an amorphous carbon. Is light, loose and superfine black powder, has very large surface area and ranges from 10 to 3000m2The carbon-containing substance is a product obtained by incomplete combustion or thermal decomposition of a carbon-containing substance (coal, natural gas, heavy oil, fuel oil, etc.) under the condition of insufficient air. Gas black, which is made of natural gas, lamp black, which is made of oils, and acetylene black, which is made of acetylene. In addition, "channel black" and "furnace black" are also included. According to the properties of carbon black, the carbon black is divided into reinforcing carbon black, conductive carbon black, wear-resistant carbon black and the like. Can be made intoThe black dye is used for manufacturing Chinese ink, printing ink, paint and the like, and is also used as a reinforcing agent of rubber.
Carbon black is widely used, and has other uses besides rubber products, so that the carbon black is divided into two types of carbon black for rubber and special carbon black. Specialty carbon blacks are carbon blacks that can impart special performance requirements to an article.
The production process of the carbon black comprises a furnace method, a spraying method, a lamp fume method, a tank method, a roller method, a gas mixing method, a thermal cracking method, an acetylene method and a plasma method, wherein the furnace method, the spraying method, the lamp fume method, the tank method, the roller method and the gas mixing method are incomplete combustion methods, and the thermal cracking method, the acetylene method and the plasma method are thermal cracking methods.
In the prior art, most enterprises adopt an oil furnace method to prepare carbon black, and the carbon black industry belongs to a high-pollution industry, so that the overall energy loss is more, and the traditional production process cannot meet the energy-saving requirement of the current society. The production of carbon black can be divided into two parts, including the heating of raw oil in the early stage and the subsequent cooling of carbon black flue gas, and the literature, namely energy saving and consumption reduction measures in the carbon black production process, discloses that the energy consumption in the carbon black production process is reduced, the economic benefit can be improved by realizing the recycling of energy in the carbon black flue gas cooling process, reducing the energy loss in the carbon black flue gas cooling process, enhancing the utilization of waste heat in the carbon black production process and the treatment of tail gas in the carbon black production process.
According to the invention, a cooling mode is additionally arranged for cooling the carbon black and the flue gas in the carbon black production link, and a tail gas and dust treatment mode is changed, so that the energy consumption is reduced while the carbon black flue gas cooling efficiency is ensured, and the problems that the carbon black production process needs environmental protection, energy saving and consumption reduction are solved.
Disclosure of Invention
The invention aims to provide a production process of special carbon black, which is used for solving the technical problem that the carbon black production process in the prior art needs environmental protection, energy conservation and consumption reduction.
In order to achieve the above object, one embodiment of the present invention provides a process for producing a specialty carbon black, comprising the steps of:
(1) air preheating: heating air to 750-850 ℃ by an air preheater, and then sending the air into a reaction furnace, wherein the introduced air provides a part of raw materials for reaction;
(2) raw oil preheating: heating coal tar to 150-250 ℃ by an oil preheater, and then sending the coal tar into a reaction furnace, wherein the introduced coal tar provides another part of raw materials for the reaction;
(3) reaction:
a. introducing natural gas and heated air into a reaction furnace for mixed combustion to generate high-temperature combustion airflow at 1600-1800 ℃;
b. introducing the heated coal tar into a reaction furnace, mixing the coal tar with high-temperature combustion gas flow, and quickly cracking to generate carbon black and flue gas;
c. introducing cooling water into the rear part of the reaction furnace to the high-temperature carbon black and the flue gas, so that the temperature of the reaction furnace is rapidly reduced, and the reaction is stopped;
(4) heat exchange and temperature reduction: the carbon black and the flue gas generated by the reaction are subjected to heat exchange and temperature reduction through an air preheater, a steam generator and an oil preheater in sequence;
(5) receiving: the cooled carbon black and the cooled flue gas are collected through a main bag filter, and the carbon black and the flue gas are separated into carbon black powder and tail gas;
(6) air conveying: introducing air into the air feeder to ensure that the collected carbon black powder is fed by the air feeder;
(7) and (3) granulation: granulating by adopting a dry granulation method, and granulating the carbon black subjected to air conveying by using a granulator to obtain carbon black particles;
(8) grading: grading the carbon black particles in a spiral grading sieve to obtain qualified particles and unqualified particles, preparing the qualified particles into finished products, and conveying the unqualified particles to a retreatment bag filter for continuous treatment;
(9) and (3) post-treatment:
a. tail gas treatment: tail gas generated in the carbon black production process is treated by 3 sets of tail gas treatment and conversion devices and can be discharged after reaching the standard;
b. and (3) dust treatment: one part of dust generated in the carbon black production process is discharged after reaching the dust collection standard through a bag filter, and the other part of dust is discharged after reaching the dust collection standard through a retreatment bag filter;
(10) packaging and warehousing finished products: and packaging and warehousing the finished product by a plastic bag.
According to one preferable scheme of the invention, the mass ratio of air to coal tar is controlled to be 0.3: 1-0.8: 1.
in one preferred embodiment of the present invention, the reaction furnace includes a combustion section, a mixing section, a reaction section, a quenching section, and a residence section.
In one of the preferable modes of the invention, the rear part of the reaction furnace is a quenching section of the reaction furnace.
In one preferable scheme of the invention, in the step (4), the carbon black and the flue gas generated by the reaction are subjected to heat exchange and temperature reduction to 200-250 ℃ through an air preheater, a steam generator and an oil preheater in sequence.
In a preferable scheme of the invention, in the step (9), the tail gas in the tail gas treatment is the tail gas in the main bag filter in the material receiving process.
In one preferable embodiment of the present invention, in step (9), the dust in the dust treatment includes dust generated by a blower during the air blowing process, dust generated by a granulator during the granulation process, dust generated by a spiral classifying screen during the classification process, and dust generated during the packaging process of the finished product.
In one preferable scheme of the invention, dust generated by the air blower can be discharged after reaching the dust collection standard through the bag filter, and dust generated in the granulating machine, the spiral grading sieve and the finished product packaging process is collected through the bag filter after being treated.
In summary, the invention has the following advantages:
1. the invention adopts the oil furnace method to prepare the carbon black, and the oil furnace method for preparing the carbon black has the advantages of large yield, low cost, multiple varieties, low energy consumption and high yield.
2. In the cooling process of the carbon black and the flue gas, the steam generator is additionally arranged for cooling the carbon black and the flue gas, so that the cooling rate of the carbon black and the flue gas is improved, and the energy loss is reduced; meanwhile, the tail gas and dust generated in the production process of the carbon black are subjected to post-treatment until the tail gas and the dust reach the environmental protection standard, and then the tail gas and the dust are discharged, so that the aims of environmental protection, energy saving and consumption reduction are fulfilled.
Detailed Description
Example 1
A production process of special carbon black comprises the following steps:
(1) air preheating: heating air to 750 ℃ by an air preheater, then sending the air into a reaction furnace, and providing a part of raw materials for reaction by the introduced air;
(2) raw oil preheating: heating coal tar to 150 ℃ by an oil preheater, then sending the coal tar into a reaction furnace, and providing another part of raw materials for the reaction by the introduced coal tar;
(3) reaction:
a. introducing natural gas and heated air into a reaction furnace for mixed combustion to generate high-temperature combustion airflow at 1600 ℃;
b. introducing the heated coal tar into a reaction furnace, mixing the coal tar with high-temperature combustion gas flow, and quickly cracking to generate carbon black and flue gas;
c. the reaction furnace comprises a combustion section, a mixing section, a reaction section, a quenching section and a retention section. Introducing cooling water into a quenching section of the reaction furnace to high-temperature carbon black and smoke so as to rapidly reduce the temperature of the carbon black and the smoke and terminate the reaction;
note: controlling the mass ratio of the introduced air to the coal tar to be 0.3: 1;
(4) heat exchange and temperature reduction: the carbon black and the flue gas generated by the reaction are subjected to heat exchange and temperature reduction to 200 ℃ through an air preheater, a steam generator and an oil preheater in sequence;
(5) receiving: the cooled carbon black and the cooled flue gas are collected through a main bag filter, and the carbon black and the flue gas are separated into carbon black powder and tail gas;
(6) air conveying: introducing air into the air feeder to ensure that the collected carbon black powder is fed by the air feeder;
(7) and (3) granulation: granulating by adopting a dry granulation method, and granulating the carbon black subjected to air conveying by using a granulator to obtain carbon black particles;
(8) grading: grading the carbon black particles in a spiral grading sieve to obtain qualified particles and unqualified particles, preparing the qualified particles into finished products, and conveying the unqualified particles to a retreatment bag filter for continuous treatment;
(9) and (3) post-treatment:
a. tail gas treatment: the tail gas in the tail gas treatment is tail gas in a main bag filter in the material receiving process, the tail gas is treated by 3 sets of tail gas treatment and conversion devices and can be discharged through a 34m high chimney after reaching the standard, and the discharged tail gas comprises particulate matters, sulfur dioxide, nitric oxide and air;
b. and (3) dust treatment: the dust in the dust treatment comprises dust generated by a wind blower in the wind conveying process, dust generated by a granulator in the granulation process, dust generated by a spiral grading sieve in the grading process and dust generated in the finished product packaging process, the dust generated by the wind blower is discharged through a chimney of 15m after being subjected to dust collection by a bag filter and reaching the standard, the dust generated in the granulator, the spiral grading sieve and the finished product packaging process is discharged through a chimney of 15m after being subjected to dust collection by a retreating bag filter and reaching the standard, and the discharged dust comprises particulate matters and air;
(10) packaging and warehousing finished products: and packaging and warehousing the finished product by a plastic bag.
Example 2
A production process of special carbon black comprises the following steps:
(1) air preheating: heating air to 850 ℃ by an air preheater, and then sending the air into a reaction furnace, wherein the introduced air provides a part of raw materials for reaction;
(2) raw oil preheating: heating coal tar to 250 ℃ by an oil preheater, then sending the coal tar into a reaction furnace, and providing another part of raw materials for the reaction by the introduced coal tar;
(3) reaction:
a. introducing natural gas and heated air into a reaction furnace for mixed combustion to generate high-temperature combustion airflow at 1800 ℃;
b. introducing the heated coal tar into a reaction furnace, mixing the coal tar with high-temperature combustion gas flow, and quickly cracking to generate carbon black and flue gas;
c. the reaction furnace comprises a combustion section, a mixing section, a reaction section, a quenching section and a retention section. Introducing cooling water into a quenching section of the reaction furnace to high-temperature carbon black and smoke so as to rapidly reduce the temperature of the carbon black and the smoke and terminate the reaction;
note: controlling the mass ratio of the introduced air to the coal tar to be 0.8: 1;
(4) heat exchange and temperature reduction: the carbon black and the flue gas generated by the reaction are subjected to heat exchange and temperature reduction to 250 ℃ through an air preheater, a steam generator and an oil preheater in sequence;
example 2 the remaining steps are the same as in example 1.
Example 3
A production process of special carbon black comprises the following steps:
(1) air preheating: heating air to 800 ℃ by an air preheater, and then sending the air into a reaction furnace, wherein the introduced air provides a part of raw materials for reaction;
(2) raw oil preheating: heating coal tar to 200 ℃ by an oil preheater, then sending the coal tar into a reaction furnace, and providing another part of raw materials for the reaction by the introduced coal tar;
(3) reaction:
a. introducing natural gas and heated air into a reaction furnace for mixed combustion to generate a high-temperature combustion airflow at 1700 ℃;
b. introducing the heated coal tar into a reaction furnace, mixing the coal tar with high-temperature combustion gas flow, and quickly cracking to generate carbon black and flue gas;
c. the reaction furnace comprises a combustion section, a mixing section, a reaction section, a quenching section and a retention section. Introducing cooling water into a quenching section of the reaction furnace to high-temperature carbon black and smoke so as to rapidly reduce the temperature of the carbon black and the smoke and terminate the reaction;
note: controlling the mass ratio of the introduced air to the coal tar to be 0.55: 1;
(4) heat exchange and temperature reduction: the carbon black and the flue gas generated by the reaction are subjected to heat exchange and temperature reduction to 225 ℃ through an air preheater, a steam generator and an oil preheater in sequence;
example 3 the remaining steps are the same as in example 1.
4 comparative examples were set, comparative example 1, comparative example 2, comparative example 3 and comparative example 4 respectively.
The differences between the specific production processes of comparative example 1, comparative example 2, comparative example 3, and comparative example 4 and the production process of example 3 are shown in table 1:
table 1: differences of production processes of comparative example 1, comparative example 2, comparative example 3 and comparative example 4 from example 3
Experimental detection
Experiment 1: content of tail gas and dust emission in carbon black production process
The carbon blacks of the examples and comparative examples each emitted a 24-hour average of the concentration values of particulate matter, sulfur dioxide and nitrogen oxides during the production process, which was determined according to the method specified in GB 3095-2012 "environmental air quality standard". The concentration of the particulate matter is determined by a gravimetric method, the concentration of the sulfur dioxide is determined by a formaldehyde absorption-pararosaniline spectrophotometry, and the concentration of the nitrogen oxide is determined by a naphthyl ethylenediamine hydrochloride spectrophotometry. The results of the tail gas and dust emissions measurements of the present example and comparative example are shown in table 2:
table 2: test results of exhaust gas and dust emissions of the present example and comparative example
As can be seen from table 2: the concentrations of the particulate matter, sulfur dioxide and nitrogen oxides discharged in the examples and the comparative examples, which are averaged over 24 hours, all meet the specified values in GB 3095-2012 "environmental air quality Standard". As can be seen from the comparative examples and comparative examples: the emission concentrations of the particulate matter, sulfur dioxide and nitrogen oxide of the examples are all smaller than those of the comparative examples, but the emission concentrations of the particulate matter, sulfur dioxide and nitrogen oxide of the comparative example 1 are not much different from those of the examples 1 to 3, and the emission concentrations of the particulate matter, sulfur dioxide and nitrogen oxide of the comparative examples 2 to 4 are much different from those of the examples 1 to 3.
Therefore, the production process of the carbon black in the embodiment of the invention has the advantage of environmental protection, the change of the cooling mode of the carbon black and the flue gas has little influence on the emission concentration of tail gas and dust in the production process of the carbon black, and the change of the mode of the after-treatment of the carbon black has great influence on the emission concentration of the tail gas and the dust.
Experiment 2: energy loss during carbon black production
In the production process of the carbon black of the embodiment and the comparative example, the energy consumption is detected according to the detection method specified in GB 29440-.
The results of the energy consumption measurements of the present example and comparative example are shown in Table 3.
Table 3: energy consumption measurement results of the present examples and comparative examples
| Numbering | Energy consumption kgce/t |
| Example 1 | 1872 |
| Example 2 | 1920 |
| Example 3 | 1860 |
| Comparative example 1 | 2115 |
| Comparative example 2 | 1995 |
| Comparative example 3 | 2182 |
| Comparative example 4 | 2012 |
As can be seen from table 3: the energy loss in the production process of the carbon black in the embodiment and the comparative example meets the limit value specified in GB 29440-. As can be seen from the comparative examples and comparative examples: the energy consumption of the embodiment is less than that of the comparative example, the energy consumption of the embodiment can reach the advanced energy consumption value of carbon black unit product, and the energy consumption of the comparative example can only reach the allowed energy consumption value of carbon black unit product; the energy consumption amounts of comparative example 2, comparative example 4 and examples 1 to 3 were not greatly different from each other, and the energy consumption amounts of comparative example 1, comparative example 3 and examples 1 to 3 were greatly different from each other.
Comparison of comparative example 2 and example 3 shows that: the energy consumption amount of example 3 was smaller than that of comparative example 2, and dry granulation was used for the carbon black of example 3, and wet granulation was used for comparative example 2. Therefore, the difference in the way the carbon black is pelletized affects the amount of energy consumed in the production of carbon black.
Comparing example 3 with comparative example 1, it can be seen that: the energy consumption amount of example 3 was smaller than that of comparative example 1, and the energy consumption amount values of comparative example 1 and example 3 were greatly different. The carbon black and the flue gas generated by the reaction in the embodiment 3 adopt a heat exchange and cooling mode of an air preheater, a steam generator and an oil preheater, and the carbon black and the flue gas generated by the reaction in the comparative example 1 adopt a heat exchange and cooling mode of the air preheater and the oil preheater. Therefore, changing the cooling mode of carbon black and flue gas has a great influence on the energy consumption in the production process of carbon black.
Comparing example 3 with comparative example 4, it can be seen that: the energy consumption amount of example 3 was smaller than that of comparative example 4, but the energy consumption amount values of comparative example 4 and example 3 were greatly different. Example 3 differs from comparative example 4 in the way of the post-treatment. Therefore, changing the way of carbon black post-treatment affects how much energy is consumed.
Therefore, the production process of the carbon black disclosed by the embodiment of the invention has the advantages of energy conservation and consumption reduction, the energy consumption in the carbon black production process can be influenced by changing the granulation mode of the carbon black, the energy consumption in the carbon black production process can be greatly influenced by changing the cooling mode of the carbon black and smoke, and the energy consumption can be slightly influenced by changing the mode of after-treatment of the carbon black.
Implementation 3: quality of carbon black product
The carbon blacks prepared in the examples and the comparative examples were tested for product quality according to the test method specified in GB 3778-. The measurement of the iodine absorption value is carried out according to GB/T3780.1, the measurement of the oil absorption value is carried out according to GB/T3780.2, the measurement of the compression-sample oil absorption value is carried out according to GB/T3780.4, the measurement of the CTAB adsorption specific surface area is carried out according to GB/T3780.5, the measurement of the tinting strength is carried out according to GB/T3780.6, and the measurement of the external surface area and the total surface area is carried out according to GB/T10722.
The results of testing the quality of the carbon black products of the present example and comparative example are shown in Table 4.
Table 4: results of quality test of carbon Black products of the present example and comparative example
As can be seen from table 4: the carbon blacks prepared in the examples of the present invention and the comparative examples were of good product quality. As can be seen from the comparative examples and comparative examples: the carbon blacks prepared in the examples and the comparative examples have little difference in performance, and the carbon black prepared in the examples has slightly better performance than the carbon black prepared in the comparative example. Therefore, the carbon black prepared in this example can meet the performance requirements required for carbon black.
As can be seen from experiments 1, 2 and 3: the production process of the carbon black disclosed by the embodiment of the invention has the advantages of environmental protection, energy conservation and consumption reduction, and the carbon black prepared by the production process can meet the performance requirements of the carbon black while the carbon black is environment-friendly, energy-saving and consumption reduction. The invention achieves the purposes of energy saving and consumption reduction by changing the granulation mode of the carbon black and the cooling mode of the carbon black and the flue gas; the purpose of environmental protection is achieved by changing the treatment mode of tail gas and dust generated in the production process of the carbon black.
Claims (8)
1. A production process of special carbon black is characterized by comprising the following steps: the method comprises the following steps:
(1) air preheating: heating air to 750-850 ℃ by an air preheater, and then sending the air into a reaction furnace, wherein the introduced air provides a part of raw materials for reaction;
(2) raw oil preheating: heating coal tar to 150-250 ℃ by an oil preheater, and then sending the coal tar into a reaction furnace, wherein the introduced coal tar provides another part of raw materials for the reaction;
(3) reaction:
a. introducing natural gas and heated air into a reaction furnace for mixed combustion to generate high-temperature combustion airflow at 1600-1800 ℃;
b. introducing the heated coal tar into a reaction furnace, mixing the coal tar with high-temperature combustion gas flow, and quickly cracking to generate carbon black and flue gas;
c. introducing cooling water into the rear part of the reaction furnace to the high-temperature carbon black and the flue gas, so that the temperature of the reaction furnace is rapidly reduced, and the reaction is stopped;
(4) heat exchange and temperature reduction: the carbon black and the flue gas generated by the reaction are subjected to heat exchange and temperature reduction through an air preheater, a steam generator and an oil preheater in sequence;
(5) receiving: the cooled carbon black and the cooled flue gas are collected through a main bag filter, and the carbon black and the flue gas are separated into carbon black powder and tail gas;
(6) air conveying: introducing air into the air feeder to ensure that the collected carbon black powder is fed by the air feeder;
(7) and (3) granulation: granulating by adopting a dry granulation method, and granulating the carbon black subjected to air conveying by using a granulator to obtain carbon black particles;
(8) grading: grading the carbon black particles in a spiral grading sieve to obtain qualified particles and unqualified particles, preparing the qualified particles into finished products, and conveying the unqualified particles to a retreatment bag filter for continuous treatment;
(9) and (3) post-treatment:
a. tail gas treatment: tail gas generated in the carbon black production process is treated by 3 sets of tail gas treatment and conversion devices and can be discharged after reaching the standard;
b. and (3) dust treatment: one part of dust generated in the carbon black production process is discharged after reaching the dust collection standard through a bag filter, and the other part of dust is discharged after reaching the dust collection standard through a retreatment bag filter;
(10) packaging and warehousing finished products: and packaging and warehousing the finished product by a plastic bag.
2. The process for the production of specialty carbon black according to claim 1, wherein: the mass ratio of the air to the coal tar is controlled to be 0.3: 1-0.8: 1.
3. the process for the production of specialty carbon black according to claim 1, wherein: the reaction furnace comprises a combustion section, a mixing section, a reaction section, a quenching section and a retention section.
4. The process for the production of specialty carbon black according to claim 1, wherein: the rear part of the reaction furnace is a quenching section of the reaction furnace.
5. The process for the production of specialty carbon black according to claim 1, wherein: in the step (4), the carbon black and the flue gas generated by the reaction are subjected to heat exchange and temperature reduction to 200-250 ℃ through an air preheater, a steam generator and an oil preheater in sequence.
6. The process for the production of specialty carbon black according to claim 1, wherein: in the step (9), the tail gas in the tail gas treatment is the tail gas in the main bag filter in the material receiving process.
7. The process for the production of specialty carbon black according to claim 6, wherein: in the step (9), the dust in the dust treatment comprises dust generated by an air blower in the air conveying process, dust generated by a granulator in the granulation process, dust generated by a spiral grading sieve in the grading process and dust generated in the finished product packaging process.
8. The process for the production of specialty carbon black according to claim 7, wherein: dust generated by the air blower can be discharged after reaching the dust collection standard through a bag filter, and dust generated in the granulating machine, the spiral grading sieve and the finished product packaging process is collected through a retreating bag filter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115430366A (en) * | 2022-08-30 | 2022-12-06 | 广州海印新材料研究发展有限公司 | Reforming reactor for producing conductive carbon black, conductive carbon black production device and method |
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