Novel reaction furnace for carbon black production

Abstract

The invention discloses a novel reaction furnace for carbon black production, which is characterized by comprising a fuel chamber, a combustion chamber and a reaction chamber, and a first combustor and a second combustor are sequentially arranged at the joint of the combustion chamber and the fuel chamber; eight fuel injection devices are arranged in the circumferential direction of the first combustor, each fuel injection device comprises a fuel pipe, each fuel pipe is connected with three fuel pipe spray head sets, and the fuel pipe spray head sets are arranged on the inner wall of the first combustor and aligned with the axial circle center. Each fuel pipe nozzle group is aligned in the circumferential direction; the first fuel pipe spray head and the second fuel pipe spray head are oppositely arranged in the axial direction; the second combustor is provided with six fuel injection devices, and the fuel injection devices are spirally distributed on the inner wall of the second combustor. Natural gas and oxygen are rapidly and efficiently mixed; the combustion efficiency is improved, the temperature of the combustion chamber rises quickly, and the oxygen content in the combustion chamber can be effectively controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon black production, and in particular relates to a new type of reaction furnace used for carbon black production. Background Art

[0002] The formation reaction of carbon black is that the high-temperature residual gas (containing excess air) produced by the complete combustion of fuel oil or gas passes through the throat section of the furnace at a flow rate greater than the speed of sound. In this process, the highly preheated raw oil droplets injected radially from the throat are sheared, collided, atomized, mixed, cracked, dehydrogenated and nucleated, and other incomplete combustion reactions are generated to form carbon black suspended in the residual gas. After a series of processes such as cooling, separation, and granulation, it becomes a carbon black product. It can be seen that the air mixing in the combustion section of the carbon black reactor is crucial to the formation of carbon black and directly affects the quality of carbon black products.

[0003] At present, the soft reactor burner has been simply improved from the original one that only used fuel oil to a simple burner that can use both fuel oil and gas. However, this improvement leads to poor rectification effect of gas and air when entering the reactor, and uneven mixing of gas and air, which in turn affects the combustion effect and causes unstable reactor temperature. Summary of the invention

[0004] Based on the above background technology, it is necessary to develop a new type of reactor for carbon black production, including a fuel chamber, a combustion chamber and a reaction chamber, and a first burner and a second burner are arranged in sequence at the junction of the combustion chamber and the fuel chamber; eight fuel injection devices are arranged circumferentially of the first burner, each fuel injection device includes a fuel pipe, each fuel pipe is connected to three groups of fuel pipe nozzle groups, and the fuel pipe nozzle groups are arranged on the inner wall of the first burner and aligned with the axial center of a circle; each group of fuel pipe nozzle groups is aligned circumferentially, and the fuel pipe nozzle group includes a first fuel pipe nozzle and a second fuel pipe nozzle, which are arranged opposite to each other in the axial direction; six redundant fuel injection devices are arranged in the second burner, and the redundant fuel injection devices are spirally distributed on the inner wall of the second burner.

[0005] Preferably, the second fuel pipe nozzle is connected to the first rotating component, the rotating component is connected to the first burner through a pin, the rotating component has teeth on one side and is meshed with the second gear, the second gear is meshed with the first gear, the first gear is connected to the second rotating component, and the second rotating component is connected to the first fuel pipe nozzle; the connecting rod at the top of the first gear is connected to the handle through an operating rod, a fixing groove is provided outside the combustion chamber, and a fixing device is provided on the handle.

[0006] Preferably, the fixing device includes a locking rod, which passes through the top and bottom of the fixing device shell, and a first stop block is provided on the locking rod inside the fixing device shell, and a first spring is provided between the first stop block and the inner wall of the fixing device shell; the top of the locking rod is connected to the fixing button, and the other end is connected to the locking block, and there are fixing pins inside the two sides of the locking block, and the fixing pins are movably connected to the locking block through the second spring; there are locking components on both sides of the fixing groove, and a third spring is provided on the top; the locking components include a locking wedge block, which is movably connected to the inner wall of the fixing groove through a fourth spring, and there is a reserved hole on the locking wedge block, and the unlocking rod passes through the fixing groove and the locking wedge block in sequence until the reserved hole.

[0007] Preferably, a fuel injection device is arranged every 45° in the longitudinal direction, the first fuel pipe nozzle on the left side in the axial direction is inclined to the right, and the second fuel pipe nozzle on the right side is inclined to the left; the natural gas sprayed by the three fuel injection devices on the top of the first burner has an angle of 75~85° with the axis, and the natural gas sprayed by the remaining five fuel injection devices has an angle of 70~80° with the axis.

[0008] Preferably, the redundant fuel injection devices are staggered by 5 to 10 cm in the axial direction, and one redundant fuel injection device is arranged every 60° in the longitudinal direction. The redundant fuel injection device has the same structure as the fuel injection device. The natural gas sprayed by the two fuel injection devices at the top of the second burner has an angle of 65 to 75° with the axis, and the natural gas sprayed by the remaining four fuel injection devices has an angle of 55 to 65° with the axis.

[0009] Preferably, the natural gas sprayed by the three fuel injection devices at the top of the first burner has an angle of 81-83° with the axis, and the natural gas sprayed by the remaining five fuel injection devices has an angle of 76-77° with the axis.

[0010] Preferably, the natural gas sprayed from the two fuel injection devices at the top of the second burner has an angle of 72-73° with the axis, and the natural gas sprayed from the remaining four fuel injection devices has an angle of 62-63° with the axis.

[0011] Beneficial effects of the present invention: The fuel pipe nozzle group 42 of the first burner 4 of the present invention is relatively arranged in a collision form, and the collision is completed before the gas reaches the center position, which accelerates the diffusion of the gas. Since the collision positions are different, the natural gas will not be completely concentrated at the radial center of the circle, which increases the diffusion radius of the natural gas and is more conducive to the mixing of natural gas and oxygen.

[0012] Adding the second burner 5 allows the combustion chamber 2 to heat up quickly and further controls the oxygen content entering the reaction chamber 3. The redundant fuel injection device 53 is spirally arranged on the inner wall of the second burner 5, increasing the contact surface between the natural gas and the remaining oxygen, allowing the natural gas to further fully burn and consume excess oxygen, thereby controlling the oxygen content in the combustion chamber 2.

[0013] The upper and lower parts of the connecting rod 4210 are respectively connected to the first gears 424 of the other two groups of fuel pipe nozzle groups. The handle 428 can control the angles of the three groups of fuel pipe nozzles at the same time, so that the angle of the fuel injection device 43 can be independently adjusted. The angle of the fuel pipe nozzle group 42 of the same group can be adjusted through the handle 428, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the reaction furnace of the present invention; Figure 2 is a structural schematic diagram of a first burner of the present invention; Figure 3 It is a longitudinal cross-sectional schematic diagram of a first burner of the present invention; Figure 4 This is a schematic diagram of the axial structure of the first burner of the present invention; Figure 5 It is a structural schematic diagram of the fuel pipe nozzle group of the present invention; Figure 6 It is a schematic diagram of the structure of the fixing device of the material pipe nozzle group of the present invention; Figure 7 is a schematic structural diagram of a second burner of the present invention; Figure 8 is a schematic longitudinal cross-sectional view of a second burner of the present invention; Fig. 9 This is a schematic diagram of the axial structure of the second burner of the present invention; The figure marks in the figure are: reactor 100, fuel chamber 1, combustion chamber 2, reaction chamber 3, first burner 4, second burner 5, fuel injection device 43, fuel pipe 41, fuel pipe nozzle group 42, first fuel pipe nozzle 429, second fuel pipe nozzle 421, redundant fuel injection device 53, redundant fuel pipe 51, redundant fuel pipe nozzle group 52, first rotating component 422, second gear 423, first gear 424, second rotating component 425, connecting rod 4210, handle 428, fixing groove 426, fixing device 427, locking rod 4271, first stopper 4272, first spring 4273, fixing button 4274, fixing pin 4275, second spring 4276, locking block 4277, fixing device housing 4278, locking component 4261, third spring 4262, locking wedge 4263, fourth spring 4264, unlocking rod 4265. DETAILED DESCRIPTION Example

[0015] A new type of reactor 100 for carbon black production provided by the present invention comprises a fuel chamber 1, a combustion chamber 2 and a reaction chamber 3, wherein a first burner 4 and a second burner 5 are sequentially arranged at the junction of the combustion chamber 2 and the fuel chamber 1; the first burner 4 is circumferentially arranged with eight fuel injection devices 43, each of which comprises a fuel pipe 41, each of which is connected to three groups of fuel pipe nozzle groups 42, the fuel pipe nozzle groups 42 are arranged on the inner wall of the first burner 4, and the fuel pipe nozzle groups 42 are aligned with the axial center of a circle; each group of fuel pipe nozzle groups 42 are aligned in the circumferential direction, and the fuel pipe nozzle groups 42 comprise a first fuel pipe nozzle 429 and a second fuel pipe nozzle 421, which are arranged opposite to each other in the axial direction; the second burner 5 is arranged with six redundant fuel injection devices 53, the redundant fuel injection devices 53 are spirally distributed on the inner wall of the second burner 5, staggered by 10 cm in the axial direction, and the redundant fuel injection devices 53 have the same structure as the fuel injection devices 43.

[0016] like Figure 3 As shown, the fuel injection device 43 is arranged at every 45° in the longitudinal direction. Figure 5 As shown, the arrow direction is the positive direction of the axis. The first fuel pipe nozzle 429 on the left side of the axis is tilted to the right, and the second fuel pipe nozzle 421 on the right side is tilted to the left. Since natural gas is lighter, the natural gas sprayed by the first fuel pipe nozzle 429 and the second fuel pipe nozzle 421 near the axis can make oxygen and natural gas better mixed; therefore, the natural gas sprayed by the three fuel injection devices 43 at the top has an angle of 80° with the axis, and the natural gas sprayed by the other five fuel injection devices 43 has an angle of 75° with the axis; The original injection ports are all aimed at the same center of the circle in the radial direction, and the natural gas is mainly concentrated in the center of the circle. Due to the high density, the air is mixed unevenly, which is easy to cause incomplete combustion. The fuel pipe nozzle group 42 of the first burner 4 of the present invention is relatively arranged in a collision form, and the collision is completed before the gas reaches the center position, which accelerates the diffusion of the gas. Due to the different collision positions, the natural gas will not be completely concentrated in the radial center of the circle, which is more conducive to the diffusion of the natural gas, and thus more conducive to mixing with oxygen; Figure 3 The end point of the dotted line is the point where the natural gas collides. It can be seen from the figure that the diffusion radius of the natural gas increases; and the design of the angle between the top and the bottom can also prevent the natural gas from getting too close to the inner wall of the burner and burning the combustion chamber. In order to quickly heat up the combustion chamber 2, the second burner 5 is added, and at the same time, the oxygen content entering the reaction chamber 3 is further controlled. The redundant fuel injection device 53 is spirally arranged on the inner wall of the second burner 5 to increase the contact between the natural gas and the remaining oxygen, so that the natural gas is further fully burned. In the longitudinal direction, the fuel injection device 53 is arranged at every 60°. The natural gas sprayed by the two fuel injection devices 53 at the top has an angle of 70° with the axis, and the natural gas sprayed by the remaining four fuel injection devices 53 has an angle of 60° with the axis, so that the excess oxygen can be consumed, thereby controlling the oxygen content of the combustion chamber 2.

[0017] The second fuel pipe nozzle 421 is connected to the first rotating component 422, and the rotating component 422 is connected to the first burner 4 through a pin. One side of the rotating component 422 has teeth and meshes with the second gear 423, the second gear 423 meshes with the first gear 424, the first gear 424 is connected to the second rotating component 425, and the second rotating component 425 is connected to the first fuel pipe nozzle 429; the connecting rod 4210 at the top of the first gear 424 is connected to the handle 428 through an operating rod, five fixing grooves 426 are arranged outside the combustion chamber 2, and a fixing device 427 is arranged on the handle 428.

[0018] The fixing device 427 includes a locking rod 4271 that passes through the top and bottom of the fixing device housing 4278. A first stopper 4272 is arranged on the locking rod 4271 inside the fixing device housing 4278. A first spring 4273 is arranged between the first stopper 4272 and the inner wall of the fixing device housing 4278. The top of the locking rod 4271 is connected to a fixing button 4274, and the other end is connected to a locking block 4277. Fixing pins 4275 are arranged inside the two sides of the locking block 4277. The fixing pins 4275 are connected to the locking button 4274 through the second spring 4276. The fixed block 4277 is movably connected; locking components 4261 are arranged on both sides of the fixed groove 426, and a third spring 4262 is arranged on the top; the locking component 4261 includes a locking wedge block 4263, which is movably connected to the inner wall of the fixed groove 426 through a fourth spring 4264, and the locking wedge block 4263 has a reserved hole. The unlocking rod 4265 passes through the fixed groove 426 and the locking wedge block 4263 in sequence until the reserved hole. The unlocking rod 4265 has a limiting structure, so that the unlocking rod 4265 is movably connected to the fixed groove 426.

[0019] The upper and lower parts of the connecting rod 4210 are respectively connected to the first gears 424 of the other two groups of fuel pipe nozzles, so that the handle 428 can control the angles of the three groups of fuel pipe nozzles at the same time.

[0020] After the fuel pipe nozzle group 42 is adjusted to the specified angle, the fixing button 4274 is pressed, and the fixing pin 4275 of the locking component 4261 is inserted into the reserved hole of the locking component 4261, thereby completing the fixation of the first gear 424; when the fixation is to be released, the unlocking rod 4265 is pressed, so that the locking rod 4271 withdraws from the fixing groove 426 under the elastic force of the third spring 4262 and the first spring 4273, and the angle of the fuel pipe nozzle group 42 can be readjusted; in addition, if motors are provided on the fixing button 4274, the unlocking rod 4265 and the handle 428, electric control can be realized to adjust the angle more effectively.

[0021] A throat section 31 is provided at the junction of the combustion chamber 2 and the reaction chamber 3. In addition, by adjusting the sizes of the first gear 424 and the second gear 423, the angles of the nozzles of different fuel pipes can be adjusted. Example

[0022] The natural gas sprayed by the three fuel injection devices 43 at the top has an angle of 82° with the axis, and the natural gas sprayed by the remaining five fuel injection devices 43 has an angle of 77° with the axis; The natural gas sprayed by the two fuel injection devices 53 at the top has an angle of 73° with the axis, and the natural gas sprayed by the other four fuel injection devices 53 has an angle of 63° with the axis. The rest is the same as in the first embodiment. Example

[0023] The natural gas sprayed by the three fuel injection devices 43 at the top has an angle of 85° with the axis, and the natural gas sprayed by the remaining five fuel injection devices 43 has an angle of 80° with the axis; The natural gas sprayed by the two fuel injection devices 53 at the top has an angle of 75° with the axis, and the natural gas sprayed by the other four fuel injection devices 53 has an angle of 65° with the axis. The rest is the same as in the first embodiment.

[0024] In the above three embodiments, when the combustion chamber reaches similar temperatures, the amount of natural gas consumed is less than that when the injection port is aimed at the same center of a circle in the radial direction, which is reduced by 3.8%, 4.5% and 4.1% respectively. Among them, the effect of embodiment 2 is the best.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new type of reactor for carbon black production, characterized in that: It includes a fuel chamber, a combustion chamber and a reaction chamber, and a first burner and a second burner are sequentially arranged at the junction of the combustion chamber and the fuel chamber; eight fuel injection devices are arranged circumferentially of the first burner, each of the fuel injection devices includes a fuel pipe, each of the fuel pipes is connected to three groups of fuel pipe nozzle groups, the fuel pipe nozzle groups are arranged on the inner wall of the first burner, and the fuel pipe nozzle groups are aligned with the axial center of a circle; each group of the fuel pipe nozzle groups is aligned in the circumferential direction, and the fuel pipe nozzle groups include the first fuel pipe nozzle and the second fuel pipe nozzle, which are arranged oppositely in the axial direction; six fuel injection devices are arranged in the second burner, and the fuel injection devices are spirally distributed on the inner wall of the second burner.

2. A novel reactor for carbon black production according to claim 1, characterized in that: The second fuel pipe nozzle is connected to the first rotating component, and the rotating component is connected to the first burner through a pin. One side of the rotating component has teeth and is engaged with the second gear, the second gear is engaged with the first gear, the first gear is connected to the second rotating component, and the second rotating component is connected to the first fuel pipe nozzle; the connecting rod at the top of the first gear is connected to the handle through an operating rod, a fixing groove is provided outside the combustion chamber, and a fixing device is provided on the handle.

3. A novel reactor for carbon black production according to claim 2, characterized in that: The fixing device includes a locking rod, which passes through the top and bottom of the fixing device shell, and a first block is provided on the locking rod inside the fixing device shell, and a first spring is provided between the first block and the inner wall of the fixing device shell; the top of the locking rod is connected to a fixing button, and the other end is connected to a locking block, and fixing pins are respectively provided inside both sides of the locking block, and the fixing pins are movably connected to the locking block through a second spring; locking components are provided on both sides of the fixing groove, and a third spring is provided on the top; the locking components include a locking wedge, which is movably connected to the inner wall of the fixing groove through a fourth spring, and a reserved hole is provided on the locking wedge, and the unlocking rod passes through the fixing groove and the locking wedge in sequence until the reserved hole.

4. A novel reactor for carbon black production according to claim 1, characterized in that: The fuel injection devices are arranged at every 45° in the longitudinal direction, the first fuel pipe nozzle on the left side in the axial direction is inclined to the right, and the second fuel pipe nozzle on the right side is inclined to the left; the natural gas sprayed by the three fuel injection devices on the top of the first burner has an angle of 75~85° with the axis, and the natural gas sprayed by the other five fuel injection devices has an angle of 70~80° with the axis.

5. A novel reactor for carbon black production according to claim 4, characterized in that: The redundant fuel injection devices are staggered 5 to 10 cm in the axial direction, and are arranged one every 60° in the longitudinal direction. The redundant fuel injection devices are consistent in structure with the fuel injection device. The natural gas ejected by the two fuel injection devices at the top of the second burner has an angle of 65 to 75° with the axis, and the natural gas ejected by the other four fuel injection devices has an angle of 55 to 65° with the axis.

6. A novel reactor for carbon black production according to claim 4, characterized in that: The natural gas sprayed by the three fuel injection devices at the top of the first burner has an angle of 81-83° with the axis, and the natural gas sprayed by the remaining five fuel injection devices has an angle of 76-77° with the axis.

7. A novel reactor for carbon black production according to claim 5, characterized in that: The natural gas sprayed by the two fuel injection devices at the top of the second burner has an angle of 72-73° with the axis, and the natural gas sprayed by the other four fuel injection devices has an angle of 62-63° with the axis.

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