Desulfurization and denitrification integrated environment-friendly treatment equipment for waste gas of carbon black reaction furnace

Abstract

The invention relates to the technical field of waste gas treatment, and discloses desulfurization and denitrification integrated carbon black reaction furnace waste gas environment-friendly treatment equipment which comprises a spray tower, a spray mechanism for spraying a treatment reagent is assembled in the spray tower, and the spray mechanism comprises a bearing frame fixedly connected to the interior of the spray tower. A rotating shaft is rotationally connected into the bearing frame, a spraying unit is assembled on the outer surface of the circumference of the rotating shaft, and a rotating piece used for driving the rotating shaft to rotate around the central axis of the rotating shaft is further arranged in the bearing frame. The desulfurization and denitrification integrated environment-friendly waste gas treatment equipment for the carbon black reaction furnace can effectively solve the problems that in the prior art, part of waste gas flowing through at a high speed cannot be fully mixed and contacted with a spraying solvent, so that the reaction is not thorough, a spraying treatment mechanism in a spraying tower mostly adopts a fixed spraying mode, the position of a spraying pipe is fixed, and the spraying effect is poor. The spraying range of the treatment reagent is limited, and the spraying uniformity is poor.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to an integrated desulfurization and denitrification waste gas environmental protection treatment device for carbon black reactors. Background Technology

[0002] During the carbon black production process, the carbon black reactor will generate a large amount of waste gas containing pollutants such as sulfides, nitrogen oxides, and dust. If such waste gas is directly discharged into the atmosphere, it will seriously pollute the ecological environment, corrode surrounding equipment and facilities, and endanger human health. Therefore, it must undergo strict environmental protection treatment before it can meet emission standards.

[0003] For sulfur oxides contained in the exhaust gas of carbon black reactors, existing exhaust gas purification methods are mainly divided into two technical routes: dry and wet. Among them, wet desulfurization has become the mainstream process due to its high reaction efficiency and relatively mature technology. The core of this process lies in the spraying technology, that is, spraying desulfurization absorption solvent into the flowing exhaust gas. The absorption solvent is generally lime or limestone slurry as an absorbent to remove sulfur oxides. Through the contact and chemical reaction between the gas and liquid phases, the sulfur oxides in the exhaust gas are effectively removed.

[0004] However, since the flue gas emitted from the reactor is usually characterized by high velocity and large flow rate, within the limited tower space and contact time, some of the high-speed flowing exhaust gas fails to mix and contact fully with the spray solvent, resulting in incomplete reaction. Furthermore, the spray treatment mechanism in the spray tower mostly adopts a fixed spraying method, with fixed spray pipe positions, which results in a limited spraying range and poor spray uniformity of the treatment reagent, further causing the exhaust gas and treatment reagent to not contact fully, thus affecting the desulfurization efficiency of the exhaust gas. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment, which can effectively solve the problems in the existing technology that some high-speed flowing exhaust gas fails to fully mix and contact with the spray solvent, resulting in incomplete reaction. In addition, the spray treatment mechanism in the spray tower mostly adopts a fixed spraying method, and the spray pipe position is fixed, resulting in a limited spraying range and poor spraying uniformity of the treatment reagent.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment device, comprising: The spray tower has an output flue fixedly connected to its top, and an input flue fixedly connected to its outer circumference for introducing exhaust gas from the carbon black reactor. The spray tower is also equipped with a circulating water tank inside. The spray tower is equipped with a spraying mechanism for spraying treatment reagents, and the spraying mechanism is located between the inlet flue and the circulating water tank. The spraying mechanism includes a support frame fixedly connected inside the spraying tower, and the top of the support frame has a slot. The support frame is rotatably connected to a rotating shaft, and a spraying unit is assembled on the outer circumference of the rotating shaft. The support frame is also provided with a rotating component for driving the rotating shaft to rotate around its central axis.

[0007] Furthermore, the inside of the rotating shaft is provided with a flow channel for conveying the treatment reagent, and the top of the rotating shaft is equipped with a guide pipe that communicates with the flow channel and penetrates the side wall of the spray tower, and the guide pipe is connected to an external treatment reagent storage device.

[0008] Furthermore, the rotating component includes a drive motor fixedly connected inside the support frame, and the output end of the drive motor is fixedly connected to a drive gear, and the outer circumferential surface of the rotating shaft is fixedly connected to a driven gear that meshes with the drive gear.

[0009] Furthermore, the spraying unit includes a delivery pipe fixedly connected to the outer circumference of the rotating shaft and communicating with the flow channel, and the delivery pipe is provided in multiple forms and distributed in a circular array along the central axis of the rotating shaft.

[0010] Furthermore, a spray tube for spraying treatment reagents is rotatably mounted on the outer circumference of the delivery pipe, and multiple spray tubes are arranged in an array along the central axis of the delivery pipe. Spray holes are opened on the outer circumference of the spray tube, and two sets of spray holes are arranged symmetrically along the central plane of the spray tube. Each set of spray holes has multiple holes arranged in an array along the central axis of the spray tube. A transmission gear is fixedly connected to the bottom of the spray tube.

[0011] Furthermore, the bearing frame is internally fixedly connected to a gear ring that meshes with the transmission gear, and the gear ring has a loose tooth section inside; When the delivery pipe rotates synchronously with the rotating shaft, the transmission gear at the bottom of the spray pipe meshes with the gear ring on the same side, so that the spray pipe revolves around the central axis of the rotating shaft and rotates around its own central axis.

[0012] Furthermore, a ring plate is fixedly connected to the outer circumference of the spray pipe, and a guide block is slidably connected to the ring plate through a guide groove at its bottom. A movable rod is fixedly connected to the bottom of the guide block, and a stop block that fits against the inner wall of the spray hole is fixedly connected to the outer circumference of the movable rod. The side of the stop block near the spray pipe is tapered, and a counterweight sleeve is fixedly connected to the outer circumference of the movable rod.

[0013] Furthermore, the guide blocks are provided in two and are symmetrically distributed along the center plane of the spray pipe. The guide blocks are connected to the inner wall of the guide groove by a return spring provided on their outer side.

[0014] The technical solution provided by this invention has the following advantages compared with the prior art: This invention features a spraying mechanism where the spray pipe undergoes a combined revolution and rotation. A drive motor, via gear transmission, rotates a shaft, causing the delivery pipe and spray pipe to revolve around the central axis of the shaft. The transmission gear at the bottom of the spray pipe meshes with a gear ring within the support frame, simultaneously causing the spray pipe to rotate around its own central axis. This expands the coverage area of ​​the desulfurization reagent spray, eliminating desulfurization blind spots. Furthermore, the rotation of the spray pipe around its own central axis further refines the reagent atomization effect, ensuring the desulfurization reagent is evenly distributed throughout the entire spray tower in a mist-like form, guaranteeing high-speed, high-flow sulfur-containing flue gas. Regardless of which area it flows through within the tower, it can fully contact the desulfurization reagent. At the same time, utilizing the loose tooth section structure of the gear ring, when the transmission gear revolves to the loose tooth section, the rotation speed decreases, the centrifugal force decreases, the return spring pushes the stop block to move towards the nozzle, reducing the nozzle opening and decreasing the reagent flow cross-sectional area. Under the premise of stable delivery flow, the reagent flow rate and spray pressure increase significantly. The high-pressure, high-speed flow of reagent liquid will form a strong scouring effect on the inner wall of the nozzle. This scouring force can promptly remove the waste gas dust and desulfurization reaction precipitates attached to the nozzle, while reducing the residue of reagent on the inner wall of the nozzle. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 2 This is a cross-sectional view of the spray tower according to an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the spraying mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional separation structure of the rotating component according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the three-dimensional separation structure of the spraying unit according to an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the spray pipe according to an embodiment of the present invention; Figure 7This is a partial three-dimensional structural diagram of the gear ring according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the three-dimensional state transformation structure of the movable rod according to an embodiment of the present invention.

[0017] The labels in the diagram represent: 1. Spray tower; 2. Output flue; 3. Input flue; 4. Circulating water tank; 5. Spraying mechanism; 51. Support frame; 52. Rotating shaft; 521. Flow channel; 53. Spraying unit; 531. Conveying pipe; 532. Spraying pipe; 533. Spray hole; 534. Transmission gear; 535. Ring plate; 536. Guide groove; 537. Guide block; 538. Movable rod; 5381. Stop block; 5382. Counterweight sleeve; 539. Return spring; 54. Rotating component; 541. Drive motor; 542. Drive gear; 543. Driven gear; 55. Guide pipe; 56. Gear ring; 561. Loose tooth section. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example: Please see Figures 1-8 This invention provides a technical solution: an integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment device, comprising: The spray tower 1 has an output flue 2 fixedly connected to its top, and an input flue 3 fixedly connected to its outer circumference for introducing exhaust gas from the carbon black reactor. The spray tower 1 is also equipped with a circulating water tank 4, which is equipped with a circulating pump. The treated reagent can be transported back to the feed pipe 55 of the spraying mechanism 5 by the circulating pump. The spray tower 1 is equipped with a spray mechanism 5 for spraying treatment reagents, and the spray mechanism 5 is located between the flue gas duct 3 and the circulating water tank 4. The spraying mechanism 5 includes a support frame 51 fixedly connected inside the spraying tower 1, and the top of the support frame 51 is provided with a slot. The support frame 51 is rotatably connected to a rotating shaft 52, and a spraying unit 53 is assembled on the outer circumference of the rotating shaft 52. The support frame 51 is also provided with a rotating component 54 for driving the rotating shaft 52 to rotate around its central axis.

[0021] The rotating shaft 52 has an internal flow channel 521 for conveying the treatment reagent. The top of the rotating shaft 52 is equipped with a guide pipe 55 that is connected to the flow channel 521 and passes through the side wall of the spray tower 1. The guide pipe 55 is connected to an external treatment reagent storage device. The guide pipe 55 and the rotating shaft 52 are connected by a rotary joint (rotary joint) to realize the material conveying and sealing of the "fixed pipeline-rotating component" and meet the reagent flow requirements when the rotating shaft 52 rotates.

[0022] The rotating component 54 includes a drive motor 541 fixedly connected inside the support frame 51, and the output end of the drive motor 541 is fixedly connected to a drive gear 542. The outer circumferential surface of the rotating shaft 52 is fixedly connected to a driven gear 543 that meshes with the drive gear 542.

[0023] The spraying unit 53 includes a delivery pipe 531 fixedly connected to the outer circumference of the rotating shaft 52 and communicating with the flow channel 521. The delivery pipe 531 has multiple pipes and is arranged in a circular array along the central axis of the rotating shaft 52.

[0024] A spray pipe 532 for spraying treatment reagents is rotatably mounted on the outer circumference of the delivery pipe 531. The spray pipe 532 has multiple nozzles and is arranged in an array along the central axis of the delivery pipe 531. Spray holes 533 are opened on the outer circumference of the spray pipe 532. There are two sets of spray holes 533 and they are symmetrically distributed along the central plane of the spray pipe 532. Each set of spray holes 533 has multiple nozzles and is arranged in an array along the central axis of the spray pipe 532. A transmission gear 534 is fixedly connected to the bottom of the spray pipe 532.

[0025] The internal structure of the support frame 51 is fixedly connected to a gear ring 56 that meshes with the transmission gear 534. The gear ring 56 has a loose tooth section 561. The tooth density in this area is lower than that in the normal area, which is used to change the meshing transmission ratio of the transmission gear 534. When the delivery pipe 531 rotates synchronously with the rotating shaft 52, the transmission gear 534 at the bottom of the spray pipe 532 meshes with the gear ring 56 on the same side, so that the spray pipe 532 revolves around the central axis of the rotating shaft 52 and rotates around its own central axis.

[0026] A ring plate 535 is fixedly connected to the outer circumference of the spray pipe 532, and a guide block 537 is slidably connected to the ring plate 535 through a guide groove 536 at its bottom. A movable rod 538 is fixedly connected to the bottom of the guide block 537. A stop block 5381 that fits against the inner wall of the spray hole 533 is fixedly connected to the outer circumference of the movable rod 538, and the side of the stop block 5381 near the spray pipe 532 is tapered. A counterweight sleeve 5382 is fixedly connected to the outer circumference of the movable rod 538.

[0027] Two guide blocks 537 are provided and are symmetrically distributed along the center plane of the spray pipe 532. The guide blocks 537 are connected to the inner wall of the guide groove 536 through a return spring 539 provided on their outer side.

[0028] Working principle and advantages of this integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment: Because the flue gas emitted from the reactor is typically characterized by high velocity and large flow rate, within the limited tower space and contact time, some of the high-speed flowing exhaust gas fails to fully mix and contact with the spray solvent, resulting in incomplete reaction. Furthermore, the spray treatment mechanism in the spray tower 1 mostly adopts a fixed spraying method, with the spray pipe 532 in a fixed position, which results in a limited spraying range and poor spray uniformity of the treatment reagent, further causing the exhaust gas and treatment reagent to fail to fully contact each other, thereby affecting the desulfurization efficiency of the exhaust gas.

[0029] In this invention, the operator drives the rotating component 54 to run through the control unit. After the drive motor 541 in the rotating component 54 is started, it drives the drive gear 542 fixedly connected to its output end to rotate at a constant speed. Since the drive gear 542 meshes with the driven gear 543 fixed on the outer circumference of the rotating shaft 52, it drives the rotating shaft 52 to rotate at a constant speed around its own central axis. The conveying pipe 531 fixedly connected to the outer circumference of the rotating shaft 52 rotates synchronously with the rotating shaft 52, realizing the revolution of the conveying pipe 531 and the spraying pipe 532 around the central axis of the rotating shaft 52.

[0030] Meanwhile, a gear ring 56 is fixedly assembled inside the support frame 51, and the transmission gear 534 fixedly connected to the bottom of the spray pipe 532 meshes with the gear ring 56. When the delivery pipe 531 revolves synchronously with the rotating shaft 52, the transmission gear 534 rotates under the meshing action of the gear ring 56, thereby driving the spray pipe 532 to rotate at a constant speed around its own central axis. Finally, the spray pipe 532 achieves a compound motion in the spray tower 1, which revolves around the central axis of the rotating shaft 52 and rotates around its own central axis, effectively expanding the spraying range of the treatment reagent and improving the spraying uniformity.

[0031] The opening and closing of the spray nozzles 533 of the spray pipe 532 is achieved through the combined action of centrifugal force and the return spring 539. The specific process is as follows: When the spray pipe 532 is not started to rotate, the guide block 537 in the ring plate 535 is in the initial position under the preload of the return spring 539. At this time, the stop block 5381 on the movable rod 538 is in close contact with the inner wall of the spray hole 533 of the spray pipe 532, and the spray hole 533 is in a closed state, which can effectively prevent reagent leakage and impurities from entering the spray hole 533 and causing blockage when not started.

[0032] When the spray pipe 532 starts to rotate around its own central axis, the guide block 537 and the movable rod 538 rotate synchronously with the spray pipe 532 and generate centrifugal force. When the centrifugal force is greater than the preload of the return spring 539, the centrifugal force overcomes the preload and pushes the guide block 537 to slide radially along the guide groove 536. The return spring 539 is compressed and deformed, and the movable rod 538 moves synchronously with the guide block 537, so that the stop block 5381 on the movable rod 538 disengages from the inner wall of the spray hole 533, and the spray hole 533 switches to the open state, providing a channel for the spraying of the treatment reagent.

[0033] It is worth noting that when the spray pipe 532 is not started, the guide block 537 is in the initial position under the pre-tightening force of the return spring 539, and the stop block 5381 on the movable rod 538 is in close contact with the inner wall of the spray hole 533, so that the spray hole 533 is in a closed state. This can effectively prevent the desulfurization reagent from leaking when the equipment is not running, and avoid reagent waste. At the same time, the closed state can prevent dust and impurities in the exhaust gas from entering the spray hole 533, and prevent impurities from mixing with the reagent and causing reagent failure, further reducing reagent loss. Only when the spray pipe 532 is started and achieves revolution + rotation, the centrifugal force overcomes the pre-tightening force of the return spring 539, and the spray hole 533 will open. At this time, the desulfurization reagent of the external storage device is accurately delivered to the spray pipe 532 through the guide pipe 55, the flow channel 521, and the conveying pipe 531 and atomized and sprayed out, realizing the synchronous control of "feeding when the spraying action starts and cutting off the material when the spraying action stops".

[0034] After the nozzle 533 is opened, the external treatment reagent storage device will transport the desulfurization treatment reagent through the feed pipe 55 to the flow channel 521 opened inside the rotating shaft 52. Since the flow channel 521 is connected to the conveying pipe 531, the treatment reagent enters each conveying pipe 531 through the flow channel 521, and is then distributed by the conveying pipe 531 to each spray pipe 532 connected to it, and finally sprayed into the spray tower 1 through the open nozzle 533.

[0035] At the same time, the exhaust gas from the carbon black reactor enters the spray tower 1 through the conveying flue. Since the spraying mechanism 5 is located above the input flue 3, the exhaust gas rising in the spray tower 1 will come into contact with the treatment reagent sprayed by the spraying mechanism 5 and undergo a chemical reaction, thereby achieving desulfurization treatment of the exhaust gas.

[0036] The spray pipe 532 revolves around the central axis of the rotating shaft 52 and also rotates on its own central axis, which can expand the spray coverage of the desulfurization reagent and eliminate desulfurization blind spots. The spray pipe revolves around the central axis of the rotating shaft 52, which can achieve full cross-section coverage of the reagent in the spray tower 1, avoiding the problem of "insufficient reagent in some areas and excessive reagent in some areas" under the fixed spraying method. At the same time, the spray pipe rotates on its own central axis, which can further refine the reagent atomization effect, allowing the desulfurization reagent to fill the entire interior of the spray tower 1 in a uniform mist form, ensuring the high-speed flow and large flow of sulfur-containing flue gas (such as carbon black reaction) Regardless of which area the flue gas from the furnace flows through within the tower, it can fully contact the desulfurization reagent. Furthermore, the rotation of the spray pipe causes disturbance in the atomized reagent droplets, breaking the stagnant layer at the gas-liquid interface and increasing the mass transfer rate between the desulfurization reagent and the sulfur-containing waste gas. Simultaneously, the significantly increased contact area between the uniformly sprayed reagent droplets and the waste gas allows the desulfurization reagent to quickly react chemically with the sulfur-containing components in the waste gas (such as acid-base neutralization and redox reactions), shortening the reaction time and ensuring that sulfur-containing pollutants are fully removed within the limited tower space and contact time, thus significantly improving desulfurization efficiency.

[0037] During the reagent spraying process, the toothed ring 56 has a loosely toothed section 561 in the corresponding area, which makes the rotation of the spray pipe 532 divided into the following two processes: First process: When the transmission gear 534 meshes with the normal tooth section of the gear ring 56 to achieve rotation, the transmission gear 534 is subjected to uniform force and has a stable rotation speed, which drives the spray pipe 532 to maintain a uniform rotation speed. At this time, the centrifugal force generated by the guide block 537 and the movable rod 538 is at a stable maximum value. This centrifugal force continuously overcomes the preload of the return spring 539, so that the guide block 537 maintains the maximum stroke radial sliding along the guide groove 536, thereby making the distance between the stop block 5381 and the spray hole 533 reach the maximum, and the spray hole 533 is in the maximum opening state. The second process: When the transmission gear 534 revolves with the delivery pipe 531 to the loose tooth section 561 of the gear ring 56, based on the transmission ratio design between the two, the rotation speed of the transmission gear 534 decreases, thereby causing the centrifugal force generated by the guide block 537 and the movable rod 538 rotating with the spray pipe 532 to decrease synchronously; when the centrifugal force is less than the preload of the return spring 539, the return spring 539 releases elastic potential energy, pushing the guide block 537 to slide along the guide groove 536 towards the center of the spray pipe 532, driving the movable rod 538 and the stop block 5381 to move synchronously towards the spray hole 533, reducing the distance between the stop block 5381 and the spray hole 533, and the opening of the spray hole 533 shrinks accordingly.

[0038] Since the side of the baffle 5381 facing the nozzle 533 is designed in a conical shape, the conical baffle 5381 can play a guiding and atomization auxiliary role. When the reagent is sprayed through the nozzle 533, the conical surface of the conical baffle 5381 can guide the reagent liquid flow, so that the reagent diffuses along the conical surface and is atomized and sprayed out, further refining the reagent droplet size, expanding the contact area between the reagent and the exhaust gas, and enhancing the desulfurization reaction effect.

[0039] When the distance between the baffle 5381 and the nozzle 533 decreases, the spraying pressure of the nozzle 533 will increase significantly under the premise that the external reagent delivery flow rate is basically stable. The core reason for this pressure change is that the reduced opening of the nozzle 533 leads to a decrease in the fluid flow cross-sectional area. According to the principles of fluid mechanics, when the total amount of reagent delivered per unit time remains constant, the flow cross-sectional area is negatively correlated with the fluid velocity and spraying pressure. The reduction in cross-sectional area will force the reagent velocity to increase, thereby driving the spraying pressure at the nozzle 533 outlet to increase synchronously. Moreover, the smaller the distance and the narrower the opening, the more obvious the pressure increase.

[0040] Increased spraying pressure significantly increases the flow rate of the desulfurization reagent as it is ejected through nozzle 533. The high-speed flowing reagent droplets collide violently with the air, further refining the droplet size and forming a more uniform and finer mist spray layer. This greatly increases the contact area between the reagent and the sulfur-containing waste gas, enhances the gas-liquid mass transfer effect, and accelerates the desulfurization chemical reaction. Especially under conditions of low exhaust gas flow and low sulfur concentration, the pressure increase caused by the reduced opening of nozzle 533 can compensate for the reduced reagent spray volume, ensuring that a small amount of reagent can still fully contact the exhaust gas, avoiding a decrease in desulfurization efficiency due to reduced reagent usage, and achieving the effect of "small flow reagent, high efficiency desulfurization". At the same time, the increased pressure at nozzle 533 will increase the jet kinetic energy of reagent droplets, extend the spray range, and enable reagent droplets to cover a wider area inside spray tower 1, especially covering areas that are difficult to reach during fixed spraying or low-pressure spraying, such as the edges and corners of the tower body. This further ensures comprehensive contact between exhaust gas and reagent inside spray tower 1 and improves the overall desulfurization uniformity. Meanwhile, the high-pressure sprayed reagent droplets will have a strong scouring effect on the inner wall of nozzle 533. Combined with the conical design of baffle 5381, it can quickly flush away a small amount of impurities (such as dust in the exhaust gas and precipitates generated by the desulfurization reaction) attached to the inner wall of nozzle 533, preventing impurities from accumulating inside nozzle 533 and causing blockage. Meanwhile, the high-speed liquid flow brought about by the increased pressure can reduce the residue of reagent on the inner wall of nozzle 533, further reducing the risk of clogging.

[0041] The desulfurized waste gas is discharged through the output flue 2 and enters the next process. The treatment reagent sprayed from the spray pipe 532 enters the circulating water tank 4 under gravity. After spraying, the reagent (including unreacted desulfurization reagent and reaction products) enters the circulating water tank 4 and can be pre-treated by sedimentation and filtration in the circulating water tank 4 to separate and remove solid impurities (such as waste gas dust and precipitates generated by the desulfurization reaction), while retaining the unreacted effective reagent components. Subsequently, the treated reagent can be transported back to the guide pipe 55 of the spraying mechanism 5 by the circulating pump and sprayed again through the spray hole 533, realizing the recycling of reagent, greatly reducing the replenishment cost of fresh reagent, and avoiding resource waste and environmental pollution caused by direct discharge of reagent.

[0042] The present invention employs a spraying mechanism 5, which has the following functions: Firstly, the spray pipe 532 achieves a combined revolution and rotation motion. The drive motor 541 drives the rotating shaft 52 to rotate via gear transmission, causing the conveying pipe 531 and the spray pipe 532 to revolve around the central axis of the rotating shaft 52. The transmission gear 534 at the bottom of the spray pipe 532 meshes with the gear ring 56 in the support frame 51, driving the spray pipe 532 to rotate around its own central axis while revolving around the shaft. This expands the spray coverage of the desulfurization reagent and eliminates desulfurization blind spots. The spray pipe revolves around the central axis of the rotating shaft 52, ensuring that the reagent is fully covered within the spray tower 1, avoiding the problems of "insufficient reagent in some areas and excessive reagent in others" under fixed spraying methods. At the same time, the rotation of the spray pipe around its own central axis further refines the reagent atomization effect, allowing the desulfurization reagent to be evenly distributed throughout the entire interior of the spray tower 1 in a mist form. This ensures that the high-speed, high-flow sulfur-containing flue gas can fully contact the desulfurization reagent no matter which area it flows through in the tower.

[0043] Secondly, when the spray pipe undergoes a combined revolution and rotation, it causes a disturbance in the atomized reagent droplets, breaking the stagnant layer at the gas-liquid interface and increasing the mass transfer rate between the desulfurization reagent and the sulfur-containing waste gas. At the same time, the contact area between the uniformly sprayed reagent droplets and the waste gas is greatly increased, allowing the desulfurization reagent to quickly react chemically with the sulfur-containing components in the waste gas, shortening the reaction time, and ensuring that sulfur-containing pollutants are fully removed within the limited tower space and contact time, thus significantly improving desulfurization efficiency.

[0044] Thirdly, the automatic opening and closing of the nozzle 533 synchronizes reagent supply and spraying action, relying on the synergistic effect of the return spring 539 and centrifugal force. When the equipment is not started, the guide block 537, under the pre-tension force of the return spring 539, drives the stop block 5381 to adhere to the inner wall of the nozzle 533, keeping the nozzle 533 in a closed state. After the equipment starts, the centrifugal force generated by the rotation of the spray pipe 532 overcomes the spring pre-tension force, pushing the guide block 537 and the stop block 5381 to move, and the nozzle 533 automatically opens. This design achieves "feeding upon spraying start and cutting off upon spraying stop," preventing reagent leakage and impurities from entering the nozzle 533.

[0045] Fourthly, utilizing the loose tooth section 561 of the gear ring 56, when the transmission gear 534 meshes with the normal tooth section of the gear ring 56, the rotation speed of the spray pipe 532 is stable, the centrifugal force is at its maximum, and the spray hole 533 maintains its maximum opening. When the transmission gear 534 revolves to the loose tooth section 561, the rotation speed decreases, the centrifugal force decreases, and the return spring 539 pushes the stop block 5381 to move towards the spray hole 533, reducing the opening of the spray hole 533. Simultaneously, the stop block 5381 has a conical design on the side facing the spray hole 533, so when the reagent is sprayed out through the spray hole 533, it diffuses along the conical surface. The non-direct linear spraying structure further refines the reagent droplet size, allowing the reagent to be distributed in a more uniform mist form within the spray tower 1, significantly increasing the contact area with the exhaust gas. Furthermore, when the opening of the nozzle 533 is reduced, the reagent flow cross-sectional area decreases. Under the premise of stable delivery flow, the reagent flow rate and spray pressure increase significantly. The high-pressure, high-speed flow of reagent liquid will exert a strong scouring effect on the inner wall of the nozzle 533. This scouring force can promptly remove the exhaust gas dust and desulfurization reaction precipitates adhering to the nozzle 533, while reducing reagent residue on the inner wall of the nozzle 533.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment, characterized in that, include: The spray tower (1) has an output flue (2) fixedly connected to its top, and an input flue (3) fixedly connected to the outer circumference of the spray tower (1) for introducing exhaust gas from the carbon black reactor. The spray tower (1) is also equipped with a circulating water tank (4). The spray tower (1) is equipped with a spraying mechanism (5) for spraying treatment reagents, and the spraying mechanism (5) is located between the flue (3) and the circulating water tank (4). The spraying mechanism (5) includes a support frame (51) fixedly connected inside the spraying tower (1), and the top of the support frame (51) is provided with a slot. The support frame (51) is rotatably connected to a rotating shaft (52), and a spraying unit (53) is assembled on the outer circumference of the rotating shaft (52). The support frame (51) is also provided with a rotating component (54) for driving the rotating shaft (52) to rotate around its central axis.

2. The integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment according to claim 1, characterized in that: The shaft (52) has an internal channel (521) for conveying the treatment reagent. The top of the shaft (52) is equipped with a guide pipe (55) that communicates with the channel (521) and penetrates the side wall of the spray tower (1). The guide pipe (55) is connected to an external treatment reagent storage device.

3. The integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment according to claim 1, characterized in that: The rotating component (54) includes a drive motor (541) fixedly connected inside the support frame (51), and the output end of the drive motor (541) is fixedly connected to a drive gear (542), and the outer circumferential surface of the rotating shaft (52) is fixedly connected to a driven gear (543) that meshes with the drive gear (542).

4. The integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment according to claim 2, characterized in that: The spraying unit (53) includes a delivery pipe (531) fixedly connected to the outer circumference of the rotating shaft (52) and connected to the flow channel (521), and the delivery pipe (531) is provided with multiple pipes and is arranged in a circular array along the central axis of the rotating shaft (52).

5. The integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment according to claim 4, characterized in that: The outer circumferential surface of the delivery pipe (531) is rotatably fitted with a spray pipe (532) for spraying treatment reagents, and the spray pipe (532) has multiple spray pipes arranged in an array along the central axis of the delivery pipe (531). The outer circumferential surface of the spray pipe (532) is provided with spray holes (533), and the spray holes (533) are provided in two sets and symmetrically distributed along the central plane of the spray pipe (532). Each set of spray holes (533) has multiple spray holes arranged in an array along the central axis of the spray pipe (532). The bottom of the spray pipe (532) is fixedly connected with a transmission gear (534).

6. The integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment according to claim 5, characterized in that: The bearing frame (51) is internally fixedly connected to a gear ring (56) that meshes with the transmission gear (534), and the gear ring (56) is provided with a loose tooth section (561). When the delivery pipe (531) rotates synchronously with the rotating shaft (52), the transmission gear (534) at the bottom of the spray pipe (532) meshes with the gear ring (56) on the same side, so that the spray pipe (532) revolves around the central axis of the rotating shaft (52) and rotates around its own central axis.

7. The integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment according to claim 5, characterized in that: A ring plate (535) is fixedly connected to the outer circumference of the spray pipe (532), and a guide block (537) is slidably connected to the ring plate (535) through a guide groove (536) at its bottom. A movable rod (538) is fixedly connected to the bottom of the guide block (537), and a stop block (5381) that fits against the inner wall of the spray hole (533) is fixedly connected to the outer circumference of the movable rod (538). The stop block (5381) is tapered on the side near the spray pipe (532), and a counterweight sleeve (5382) is fixedly connected to the outer circumference of the movable rod (538).

8. The integrated desulfurization and denitrification carbon black reactor exhaust gas environmental protection treatment equipment according to claim 7, characterized in that: Two guide blocks (537) are provided and are symmetrically distributed along the center plane of the spray pipe (532). The guide blocks (537) are connected to the inner wall of the guide groove (536) by a reset spring (539) provided on their outer side.

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