CN209923237U - Novel carbon black reacting furnace - Google Patents
Novel carbon black reacting furnace Download PDFInfo
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- CN209923237U CN209923237U CN201920273648.4U CN201920273648U CN209923237U CN 209923237 U CN209923237 U CN 209923237U CN 201920273648 U CN201920273648 U CN 201920273648U CN 209923237 U CN209923237 U CN 209923237U
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Abstract
The utility model discloses a novel carbon black reaction furnace, which comprises a combustion section, a throat section, a reaction section and a cooling section which are connected in sequence; the reaction section comprises a gradual expansion section and a direct expansion section; one end of a small opening of the gradually expanding section is connected with the throat pipe section, one end of a large opening is connected with the directly expanding section, and the other end of the directly expanding section is connected with the cooling section; the diameter of the end surface of one end of the large opening of the gradually expanding section is smaller than the diameter of the section of the straight expanding section. By adopting the design, the flared design of the gradually expanding section can increase the flow velocity of flue gas and improve the collision among particles in the carbon black generation process, and the direct expanding section designed by the gradually expanding section can ensure that the flow velocity of high-temperature airflow is not increased any more, so that the flow velocity of the accelerated high-temperature airflow is proper, the reaction time is further prolonged, the formation of crystal nuclei is facilitated, and the production efficiency of the carbon black is improved; the connection part of the divergent section and the straight section has pressure difference, so that the collision among carbon black small molecules can be further promoted. The utility model provides the quality of carbon black has been promoted, and screen surplus thing and ash content are lower, and carbon black color strength is high.
Description
Technical Field
The utility model relates to a carbon black production technical field, in particular to novel carbon black reacting furnace.
Background
Carbon black is produced by incomplete combustion of raw oil (coal tar, anthracene oil, ethylene tar, etc.) under high temperature and high flow rate conditions in a reaction furnace. The most widely used equipment in the production of carbon black in the prior art is a six-section type reaction furnace, which comprises six parts, namely a furnace end, a combustion section, a throat section, a reaction section, a cooling section and a retention section, which are connected in sequence. The working principle of the reaction furnace is as follows: coal gas and air enter a combustion section through a furnace end, are completely combusted in the combustion section to generate high-temperature and high-speed airflow, and then enter a throat section; at the moment, raw oil is sprayed into the throat section through an oil gun arranged on the throat section, and then is contacted and mixed with high-temperature high-speed airflow from a combustion section in the throat section and a reaction section, and the raw oil is quickly vaporized and cracked to generate carbon black; then the carbon black enters a cooling section to be rapidly cooled and then enters a staying section to prepare for the next process (the processes of granulation, drying or collection and the like of the carbon black).
The reaction time and the probability of collision determine the yield and quality of the carbon black in the reaction production process of the carbon black, that is, the structure of the reaction section of the carbon black reaction furnace has a great influence on the yield and quality of the carbon black. The reaction section of a conventional carbon black reactor is generally designed as follows: 1. the reaction section connected with the throat section is in a flaring horn shape; 2. the reaction section connected with the throat pipe section is in a hollow cylinder shape, and the diameter of the cross section of the reaction section is larger than that of the part connected with the throat pipe section.
In the first of the two design modes, the reaction section is in a flaring horn shape, the flow rate of high-temperature airflow is too high, and partial raw materials cannot fully and effectively react completely; in the second design, the reaction chamber of the reaction section is large, the flow rate of high-temperature airflow is slow, and the probability of collision among particles in the carbon black generation process is small. The two designs both have the technical problem that the quality of the carbon black generated by the reaction is low, and the technical problems are mainly reflected in low carbon black coloring strength and high screen residue and ash content.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a novel carbon black reacting furnace, overcome the technical problem that the carbon black quality that traditional carbon black reacting furnace reaction section design is low because the reaction chamber is big, the high temperature airflow velocity of flow is slow or too fast, carbon black generates in-process particle inter-particle collision probability is little, leads to.
In order to solve the technical problem, the utility model discloses a technical scheme does:
a novel carbon black reaction furnace comprises a combustion section, a throat section, a reaction section and a cooling section which are connected in sequence; the reaction section comprises a divergent section and a straight section; one end of a small opening of the gradually expanding section is connected with the throat pipe section, one end of a large opening of the gradually expanding section is connected with the directly expanding section, and the other end of the directly expanding section is connected with the cooling section; the diameter of the end face of one end of the large opening of the gradually expanding section is smaller than the diameter of the section of the straight expanding section.
Preferably, the ratio of the length of the straight expanding section to the length of the diverging section is 1-2.5: 1.
More preferably, the ratio of the length of the straight section to the length of the diverging section is 2: 1.
Preferably, the taper angle of the divergent section is 30-60 °.
Preferably, the front part, the middle part and the rear part of the throat section are provided with oil guns.
Preferably, the oil guns are equally spaced along the axial direction of the throat section.
Preferably, the number of the oil guns is 6 or 8, and the oil gun projections arranged at the front part, the middle part and the rear part of the throat section are all overlapped.
Preferably, the inner walls of the combustion section, the throat section, the reaction section and the cooling section sequentially comprise a zirconium-chromium corundum layer and an alumina hollow sphere layer from inside to outside.
The utility model has the advantages that:
the reaction section of the carbon black reaction furnace comprises a gradual expansion section and a direct expansion section; one end of a small opening of the gradually expanding section is connected with the throat pipe section, and one end of a large opening of the gradually expanding section is connected with the straight expanding section; the diameter of the end face of one end of the large opening of the gradually expanding section is smaller than the diameter of the section of the straight expanding section. By adopting the design, the flared design of the gradually expanding section can increase the flow velocity of flue gas and improve the collision among particles in the carbon black generation process, but the direct expanding section designed next to the gradually expanding section can ensure that the flow velocity of high-temperature airflow is not increased any more, so that the flow velocity of the accelerated high-temperature airflow is proper, the reaction time is further prolonged, the formation of crystal nuclei is facilitated, and the production efficiency of the carbon black is improved; the connection part of the divergent section and the straight section has pressure difference, so that the collision among carbon black small molecules can be further promoted. Compared with the carbon black reacting furnace in the prior art, the utility model provides the quality of carbon black has been promoted, and screen surplus thing and ash content are lower, and carbon black color strength is high.
Drawings
FIG. 1 is a schematic structural view of the combustion section, throat section and reaction section of the present invention.
In the figure, 1-combustion section, 2-throat section, 3-reaction section, 4-oil gun, 5-zirconium chromium corundum layer, 6-alumina hollow sphere layer, 30-gradual expansion section and 31-direct expansion section.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
A novel carbon black reaction furnace comprises a combustion section 1, a throat section 2, a reaction section 3 and a cooling section which are connected in sequence; the structure of the combustion section 1, the throat section 2 and the reaction section 3 is shown in figure 1, wherein the reaction section 3 comprises a gradually expanding section 30 and a directly expanding section 31, the gradually expanding section 30 is in a horn shape, and the directly expanding section 31 is in a hollow cylinder shape; one end of a small opening of the divergent section 30 is connected with the throat section 2, one end of a large opening is connected with the straight divergent section 31, and the other end of the straight divergent section 31 is connected with the cooling section; the cooling section is also in a hollow cylinder shape, and the diameter of the section of the cooling section is the same as that of the section of the straight expanding section 31; the diameter of the end face of the large opening end of the divergent section 30 is smaller than the diameter of the cross section of the straight-expanding section 31, and by adopting the design, when high-temperature air flow coming out of the large opening end of the divergent section 30 enters the straight-expanding section 31, the collision among carbon black small molecules can be further promoted because the pressure difference exists at the joint of the divergent section 30 and the straight-expanding section 31. It should be noted that the furnace end, the cooling section and the stopping section which are conventionally arranged in the carbon black reaction furnace are not shown in the drawings of the present invention, and those skilled in the art can understand that the above structure is designed conventionally, and the present invention is not limited further.
Preferably, the ratio of the length of the straight section 31 to the length of the divergent section 30 is 1-2.5: 1. By the design, on one hand, the flow velocity of high-temperature airflow in the carbon black production process can be increased, and the collision among carbon black particles is improved; on the other hand, under the condition of the length proportion, the reaction time can be prolonged, which is beneficial to forming crystal nucleus and improving the production efficiency of the carbon black.
More preferably, the ratio of the length of the straight section 31 to the length of the divergent section 30 is 2: 1.
Preferably, the taper angle of the diverging section 30 is 30-60 °. If the cone angle is designed to be smaller, the high-temperature gas flow channel in the reaction furnace is narrower; if the cone angle is designed to be large, the volume of the reaction furnace is too large; the cone angle is too small or too large, which is not beneficial to production.
Preferably, the front part, the middle part and the rear part of the throat section 2 are provided with oil guns 4. By adopting the design, the mode of multi-point oil injection and multi-stage combustion is adopted, so that the reaction is more sufficient and uniform, and the sieve residue content is further reduced.
Preferably, the oil guns 4 are equally spaced along the axis of the throat section 2.
Preferably, the oil guns 4 are arranged in 6 or 8, and the projections of the oil guns 4 arranged at the front part, the middle part and the rear part of the throat section 2 are all overlapped. By adopting the design, the raw oil can be ensured to have enough penetrating power and coverage surface, and the atomization of the raw oil is facilitated, so that the generation efficiency of the carbon black is improved.
Preferably, the inner walls of the combustion section 1, the throat section 2, the reaction section 3 and the cooling section sequentially comprise a zirconium chromium corundum layer 5 and an alumina hollow sphere layer 6 from inside to outside.
Detailed description of the preferred embodiment 1
Use the utility model provides a carbon black reacting furnace produces high-quality YFG501, YFG502 and YF503 carbon black respectively, produces the comparative analysis with conventional reacting furnace.
Main raw materials and auxiliary materials: the raw oil is anthracene oil and carbon black oil; the fuel is coke oven gas; the raw oil atomization steam is selected as medium-pressure steam; the specific main process parameter control is shown in the following table:
table-production process parameter control table
TABLE II carbon black finished product quality requirement table
Table III table of quality of carbon black product produced by conventional carbon black reaction furnace
TABLE IV table for quality of carbon black finished product produced by the novel carbon black reaction furnace
Can find out from the table, use the utility model provides a carbon black reacting furnace produces high-quality YFG501, YFG502 and YF503 carbon black, and the carbon black of the above-mentioned model of the more conventional carbon black reacting furnace production of finished product quality is better, and product quality satisfies the quality index requirement completely, and the above-mentioned model carbon black of conventional carbon black reacting furnace production even some indexes still appear the condition not up to standard. The quality indexes are mainly represented as follows: higher oil absorption value, lower content of 45um screen residue and ash.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (8)
1. A novel carbon black reaction furnace comprises a combustion section (1), a throat section (2), a reaction section (3) and a cooling section which are connected in sequence; the method is characterized in that: the reaction section (3) comprises a divergent section (30) and a straight section (31); one end of a small opening of the gradually expanding section (30) is connected with the throat pipe section (2), one end of a large opening is connected with the directly expanding section (31), and the other end of the directly expanding section (31) is connected with the cooling section; the diameter of the end face of the large opening end of the divergent section (30) is smaller than the diameter of the section of the straight divergent section (31).
2. A novel carbon black reacting furnace according to claim 1, wherein: the ratio of the length of the straight expanding section (31) to the length of the divergent section (30) is 1-2.5: 1.
3. A novel carbon black reacting furnace according to claim 2, characterized in that: the ratio of the length of the straight expanding section (31) to the length of the diverging section (30) is 2: 1.
4. A novel carbon black reacting furnace according to claim 2, characterized in that: the taper angle of the divergent section (30) is 30-60 degrees.
5. A novel carbon black reaction furnace according to claim 4, wherein: and oil guns (4) are arranged at the front part, the middle part and the rear part of the throat pipe section (2).
6. A novel carbon black reaction furnace according to claim 5, wherein: the oil guns (4) are distributed at equal intervals along the axial direction of the throat pipe section (2).
7. The novel carbon black reaction furnace as claimed in claim 6, wherein: the oil guns (4) are respectively provided with 6 or 8, and the projections of the oil guns (4) arranged at the front part, the middle part and the rear part of the throat pipe section (2) are all overlapped.
8. The novel carbon black reaction furnace as claimed in any one of claims 1 to 7, wherein: the inner walls of the combustion section (1), the throat pipe section (2), the reaction section (3) and the cooling section sequentially comprise a zirconium-chromium corundum layer (5) and an aluminum oxide hollow sphere layer (6) from inside to outside.
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| CN201920273648.4U CN209923237U (en) | 2019-03-05 | 2019-03-05 | Novel carbon black reacting furnace |
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| CN201920273648.4U CN209923237U (en) | 2019-03-05 | 2019-03-05 | Novel carbon black reacting furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777158A (en) * | 2019-03-05 | 2019-05-21 | 云南云维飞虎化工有限公司 | A kind of new-type carbon black reacting furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777158A (en) * | 2019-03-05 | 2019-05-21 | 云南云维飞虎化工有限公司 | A kind of new-type carbon black reacting furnace |
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