Quenching structure and carbon black reaction furnace with same

Abstract

The utility model relates to the technical field of carbon black production, in particular to a quenching structure which comprises a reaction section and an original quenching section, and the reaction section is arranged at the front end of the original quenching section; three rows of third quenching spray guns are annularly arranged at the side part of the reaction section along the axial direction, are arranged at equal intervals and are used for injecting quenching water into a reaction area at the rear section of the reaction section; according to the rapid cooling structure and the carbon black reaction furnace with the rapid cooling structure, a new rapid cooling position is designed at the rear section of a reaction section, so that rapid cooling water acts on a reaction area in advance, excessive polymerization is inhibited, and the problems of overlarge primary particles and insufficient surface activity caused by overlong high-temperature retention time in the traditional process are solved.

Description

Technical Field

[0001] This utility model relates to the field of carbon black production technology, and in particular to a rapid cooling structure and a carbon black reactor having the structure. Background Technology

[0002] Carbon black, as a core reinforcing agent in the rubber industry, directly determines the wear resistance of tires. In carbon black production, the quenching structure of the reactor is the core link in controlling the size, specific surface area, and surface chemical activity of primary carbon black particles. Its function is to quickly terminate the high-temperature reaction by injecting quenching water, thereby fixing the microstructural characteristics of the particles.

[0003] To meet the stringent wear resistance requirements of products such as tires, high-surface-area hard carbon black needs to achieve a high specific surface area and abundant surface lattice defects through extremely small primary particles. However, the quenching position design of existing carbon black reactors (such as the hard carbon black reactor described in patent application CN202120004999.2) is unreasonable. The quenching water injection point is far from the reaction zone, causing the carbon atoms generated by the cracking of the feed oil to remain in the high-temperature environment for too long. This leads to excessive polymerization of carbon atoms, forming larger primary particles, resulting in a decrease in specific surface area and failing to meet the performance requirements of high-surface-area hard carbon black. Utility Model Content

[0004] In view of this, the present invention proposes a quenching structure and a carbon black reactor having the structure. By designing a new quenching position in the later part of the reaction section, the quenching water is applied to the reaction zone in advance to inhibit excessive polymerization and solve the problem of excessively large primary particles and insufficient surface activity caused by excessively long high-temperature residence time in traditional processes.

[0005] The technical solution of this utility model is implemented as follows:

[0006] On the one hand, this utility model provides a rapid cooling structure, including a reaction section and a primary rapid cooling section, wherein,

[0007] The reaction section is located at the front end of the original quench section;

[0008] The side of the reaction section is provided with three rows of third quench spray guns along the axial direction, wherein,

[0009] The three rows of third quench spray guns are arranged at equal intervals, and the three rows of third quench spray guns are used to inject quench water into the reaction zone of the rear section of the reaction section.

[0010] Based on the above technical solutions, preferably, the spacing between two adjacent rows of the third rapid cooling spray guns is 153mm.

[0011] Based on the above technical solutions, preferably, the third rapid cooling spray gun in the front row is 1067mm away from the front end of the reaction section.

[0012] Based on the above technical solutions, preferably, a row of first quench spray guns is provided on the side ring of the original quench section, wherein,

[0013] The first quench spray gun is 1829 mm away from the front end of the reaction section.

[0014] Based on the above technical solutions, preferably, the side of the original rapid cooling section is provided with at least three rows of second rapid cooling spray guns along the axial direction, wherein,

[0015] The second quenching spray gun is located behind the first quenching spray gun;

[0016] The second quench spray guns in the third row are arranged at equal intervals.

[0017] Based on the above technical solutions, preferably, the third quenching spray gun, the first quenching spray gun, and the second quenching spray gun are all atomizing guns.

[0018] Based on the above technical solutions, preferably, the spray pattern of the atomizing gun is fan-shaped, and the spray angle is 60-150 degrees.

[0019] Based on the above technical solution, preferably, threaded holes are provided through the sides of both the reaction section and the original quenching section, corresponding to the position of the atomizing gun.

[0020] The atomizing gun is screwed into the threaded hole.

[0021] On the other hand, this utility model also provides a carbon black reactor, including the above-mentioned quenching structure, and further including a combustion section and a throat section, wherein,

[0022] The throat segment is located at the front end of the reaction section;

[0023] The combustion section is located at the front end of the throat section.

[0024] Based on the above technical solutions, preferably, the combustion section is provided with a fuel injection port at the front end and an air injection port at the side, and the throat section is provided with a raw material oil spray gun at the side.

[0025] The rapid cooling structure and carbon black reactor having the present invention have the following advantages over the prior art:

[0026] (1) By setting three rows of annular third quench spray guns on the side of the reaction section and arranging them at equal intervals, the quench water is evenly distributed in the reaction zone at the rear of the reaction section. This layout allows the quench water to act on the reaction zone in advance, effectively suppressing the excessive polymerization of carbon atoms at high temperature, thereby significantly reducing the original particle size, increasing the specific surface area, and better preserving the surface lattice defects and active groups, enhancing the surface chemical activity, and meeting the performance requirements of high surface area hard carbon black.

[0027] (2) By setting up a third quenching spray gun, a first quenching spray gun and a second quenching spray gun, segmented step quenching can be achieved, which facilitates segmented temperature control, improves the inhibition effect, and makes the original particle size smaller.

[0028] (3) By setting threaded holes on the side of the reaction section and the original quenching section, the atomizing gun can be quickly installed and disassembled, which facilitates the maintenance of the atomizing gun. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a carbon black reactor according to the present invention;

[0031] Figure 2 This is a schematic diagram of the annular structure of the third rapid cooling spray gun of this utility model;

[0032] Figure 3 This is a schematic diagram of the installation structure of the third rapid cooling spray gun of this utility model;

[0033] In the diagram: 1. Combustion section; 2. Throat section; 3. Reaction section; 4. Initial quenching section; 21. Raw material oil spray gun; 31. Third quenching spray gun; 41. First quenching spray gun; 42. Second quenching spray gun; 101. Combustion material injection port; 102. Air injection port. Detailed Implementation

[0034] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] like Figure 1-3 As shown, a rapid cooling structure of this utility model includes a reaction section 3 and a primary rapid cooling section 4.

[0036] The reaction section 3 is located at the front end of the original quenching section 4, and three rows of third quenching spray guns 31 are arranged axially along the side of the reaction section 3. The three rows of third quenching spray guns 31 are arranged at equal intervals and are used to inject quenching water into the reaction zone of the rear section of the reaction section 3.

[0037] In this structure, by setting three rows of annular third quench spray guns 31 on the side of the reaction section 3 and arranging them at equal intervals, it is easy to achieve uniform distribution of quench water in the reaction zone of the rear section of the reaction section 3. This layout allows the quench water to act on the reaction zone in advance, effectively suppressing the excessive polymerization of carbon atoms at high temperature, thereby significantly reducing the original particle size, increasing the specific surface area, and better preserving surface lattice defects and active groups, enhancing surface chemical activity, and meeting the performance requirements of high surface area hard carbon black.

[0038] The reaction section 3 contains a reaction zone. The front section of the reaction zone is used for polymerization, and the rear section is used for injecting quench water, so that the quench water acts on the reaction zone in advance. The rear section of the reaction zone starts at the front position of the third quench spray gun 31 and ends at the end of the reaction section 3, and its axial length accounts for 30-45% of the total length of the reaction section 3.

[0039] also, Figure 2 The circumferential ring layout of the third rapid cooling spray gun 31 in a single row is shown. Each row contains 6 atomizing guns, which are evenly distributed along the side wall of the reaction section 3. Figure 1 The design showcases a three-row, equally spaced third quench spray gun 31, with an adjacent row spacing of 153mm. This optimizes the distribution density of the quench water, ensuring uniform and non-overlapping cooling coverage of the third quench spray gun 31. This avoids localized overcooling or cooling blind spots, further suppressing the chain polymerization of carbon atoms at high temperatures, resulting in a more uniform primary particle size distribution. Simultaneously, it reduces carbon black agglomeration caused by uneven cooling, improving product quality stability. The spacing between adjacent third quench spray guns 31 allows for an installation tolerance of ±5mm to accommodate actual production conditions.

[0040] The third quenching spray gun 31 in the front row is 1067 mm from the front end of the reaction section 3. This ensures that the quenching water acts on the reaction zone after carbon atoms are generated, significantly shortening the high-temperature residence time of carbon atoms, effectively terminating the over-polymerization reaction, resulting in smaller primary particle size, while retaining surface defects and active groups, enhancing the interfacial bonding between carbon black and rubber, and improving the tensile strength of the rubber compound. Specifically, in a straight line from front to back, the third quenching spray gun 31 in the front row refers to the first row of third quenching spray guns 31, the third quenching spray gun 31 in the middle row refers to the second row of third quenching spray guns 31, and the third row of third quenching spray guns 31 refers to the rear row of third quenching spray guns 31.

[0041] In addition, in the above-mentioned rapid cooling structure, a row of first rapid cooling spray guns 41 is arranged around the side of the original rapid cooling section 4, and at least three rows of second rapid cooling spray guns 42 are also arranged around the axial direction. The three rows of second rapid cooling spray guns 42 are arranged at equal intervals, and the second rapid cooling spray guns 42 are located behind the first rapid cooling spray guns 41. The first rapid cooling spray guns 41 are 1829mm away from the front end of the reaction section 3.

[0042] In this structure, the first quench spray gun 41 and the second quench spray gun 42 are also atomizing guns. The spray pattern of the atomizing gun and the aforementioned atomizing gun (the third quench spray gun 31) is fan-shaped, and the spray angle is 60-150 degrees.

[0043] Furthermore, both the first quench spray gun 41 and the second quench spray gun 42 adopt the same circular arrangement as the third quench spray gun 31, with each row containing 6 atomizing guns evenly distributed circumferentially. The second quench spray gun 42 and the third quench spray gun 31 adopt the same axial spacing arrangement.

[0044] In the above structure, the first quenching spray gun 41 and the second quenching spray gun 42 are arranged in a ring along the side of the original quenching section 4 to ensure uniform mixing of quenching water and high-temperature flue gas, eliminating local overcooling or high-temperature residue caused by uneven cooling. Combined with the fan-shaped spray of the atomizing gun, the cooling coverage area is expanded, reducing the dispersion of carbon black particle size distribution and improving product quality stability.

[0045] Meanwhile, this structure enables segmented, stepped rapid cooling, facilitating segmented temperature control, improving the inhibition effect, and resulting in smaller primary particle size. Specifically, segmented temperature control gradually reduces the temperature, preventing the oxidation and decomposition of surface-active groups or structural embrittlement caused by excessively rapid cooling.

[0046] In addition, threaded holes are provided on the sides of the reaction section 3 and the original quenching section 4, corresponding to the position of the atomizing gun. The atomizing gun is screwed into the threaded hole, thereby realizing the quick installation and disassembly of the atomizing gun and facilitating the maintenance of the atomizing gun.

[0047] The above-described quenching structure is applied to a carbon black reactor used to produce high surface area hard carbon black. In addition to the above structure, the reactor also includes a throat section 2 located at the front end of the reaction section 3 and a combustion section 1 located at the front end of the throat section 2.

[0048] The combustion section 1 has a fuel injection port 101 at its front end and an air injection port 102 at its side. The throat section 2 has a raw material oil spray gun 21 at its side.

[0049] In this structure, the throat section 2 adopts a narrowing design, which can accelerate the atomization of the feedstock oil and work synergistically with the efficient combustion of the combustion section 1 to ensure the full cracking of the feedstock oil.

[0050] In actual production, combustion air and fuel undergo complete combustion in combustion section 1, providing the necessary calorific value for carbon black pyrolysis. After the calorific value is accumulated, feed oil is injected into feed oil spray gun 21 and enters throat section 2 to reaction section 3 for pyrolysis-polymerization. Quenching water is injected through the third quenching spray gun 31, acting on the reaction zone in advance to inhibit excessive polymerization of carbon atoms at high temperatures, thereby reducing the primary particle size, increasing the specific surface area, and better preserving surface lattice defects and active groups, enhancing surface chemical activity, and meeting the performance requirements of high surface area hard carbon black.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quenching structure, comprising a reaction section (3) and a primary quenching section (4), wherein, The reaction section (3) is located at the front end of the original quenching section (4); Its characteristic is that: the side of the reaction section (3) is provided with three rows of third quench spray guns (31) along the axial direction, wherein, The three rows of third quench spray guns (31) are arranged at equal intervals, and the three rows of third quench spray guns (31) are used to inject quench water into the reaction zone of the rear section of the reaction section (3).

2. A quench structure as claimed in claim 1, wherein: The spacing between two adjacent rows of the third quench spray guns (31) is 153 mm.

3. A quench structure as claimed in claim 1, wherein: The third quench spray gun (31) in the front row is 1067 mm away from the front end of the reaction section (3).

4. A quench structure as claimed in claim 1, wherein: The original rapid cooling section (4) has a row of first rapid cooling spray guns (41) arranged around its side, wherein, The first quench spray gun (41) is 1829 mm away from the front end of the reaction section (3).

5. A quench structure as claimed in claim 4, wherein: The side of the original quench section (4) is provided with at least three rows of second quench spray guns (42) along the axial direction, wherein, The second quenching spray gun (42) is located behind the first quenching spray gun (41); The second quench spray guns (42) in the three rows are arranged at equal intervals.

6. A quench structure as claimed in claim 5, wherein: The third quenching spray gun (31), the first quenching spray gun (41) and the second quenching spray gun (42) are all atomizing guns.

7. A quench structure as claimed in claim 6, wherein: The atomizing gun produces a fan-shaped spray pattern with a spray angle of 60-150 degrees.

8. A quench structure as claimed in claim 6, wherein: Both the reaction section (3) and the original quench section (4) have threaded holes on their sides corresponding to the position of the atomizing gun. The atomizing gun is screwed into the threaded hole.

9. A carbon black reactor characterized by: Including the quenching structure as described in any one of claims 1-8, it further includes a combustion section (1) and a throat section (2), wherein, The throat segment (2) is located at the front end of the reaction segment (3); The combustion section (1) is located at the front end of the throat section (2).

10. A carbon black reactor as in claim 9, characterized by: The combustion section (1) is provided with a fuel injection port (101) at the front end and an air injection port (102) at the side. The throat section (2) is provided with a raw material oil spray gun (21) at the side.

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