A tail gas purification treatment device for petrochemical production

Abstract

The application discloses a tail gas purification treatment device for petroleum chemical production, and relates to the technical field of petroleum chemical production. The tail gas purification treatment device comprises a purification tank, a rack is symmetrically arranged on the outer surface of the purification tank, and a sealing cover is rotatably connected to the opening of the purification tank. The purification tank provides a closed space for the reaction cavity of the whole tail gas purification treatment device and the mixing reaction of the tail gas and the purification liquid, so that the leakage of harmful gas and the pollution of the environment are prevented. The sealing cover is used for closing the opening at the top of the purification tank, preventing the leakage of harmful gas during the purification process, and cleaning the purification liquid in the purification tank after the completion of the tail gas purification. The tail gas purification treatment device for petroleum chemical production can prevent the concentration change of the purification liquid from affecting the tail gas purification efficiency.

Description

Technical Field

[0001] This invention relates to the field of petrochemical production technology, specifically to a tail gas purification and treatment device for petrochemical production. Background Technology

[0002] Petrochemical production processes generate large quantities of exhaust gases containing harmful components such as sulfides, nitrogen oxides, volatile organic compounds, and particulate matter. If these gases are directly emitted without effective purification, they will severely pollute the atmosphere and endanger human health. Currently, petrochemical exhaust gas purification mainly employs technologies such as wet absorption, adsorption, catalytic combustion, and biological methods. Among these, wet absorption is the most widely used in the treatment of exhaust gases from small and medium-sized petrochemical plants and tank farms due to its mature technology, simple operation, and low operating costs. Its basic principle is to utilize a purification liquid (such as alkaline solution or oxidant solution) in countercurrent or cocurrent flow contact with the exhaust gas, absorbing the harmful gas components into the liquid phase through physical dissolution and chemical reactions.

[0003] However, existing petrochemical tail gas purification and treatment devices still have the following technical problems in practical applications: In traditional spray or bubble absorption methods, exhaust gas typically passes through the purification liquid layer in the form of large bubbles. The gas inside the bubbles cannot fully contact the liquid phase, and the effective contact area between the gas and liquid phases is limited by the bubble size and distribution uniformity. Especially for poorly soluble harmful gases (such as some volatile organic compounds), the mass transfer resistance is large, and the absorption efficiency of a single pass through the liquid layer is low. It is often necessary to increase the tower height or connect multiple stages in series to meet the standards, resulting in large equipment size and increased investment costs.

[0004] Second, as the absorption reaction continues, the effective components in the purified liquid are gradually consumed, resulting in differences in the concentration of the purified liquid in different areas. The concentration decreases more rapidly in areas near the air inlet, while the concentration remains higher in areas farther from the air inlet. Existing devices mostly rely on natural diffusion or simple mechanical stirring to balance the concentration, but the stirring range and intensity are limited, making it difficult to achieve a rapid and uniform distribution of the purified liquid concentration. This leads to low utilization of the purified liquid in some areas and a decrease in overall absorption capacity.

[0005] In view of the above-mentioned technical problems, this application proposes a tail gas purification and treatment device for petrochemical production. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tail gas purification and treatment device for petrochemical production, comprising a purification chamber, a frame symmetrically fixed to the outer surface of the purification chamber, and a sealing cover rotatably connected to the opening of the purification chamber. By providing the purification chamber, the entire tail gas purification and treatment device's reaction chamber is enclosed, providing a closed space for the mixing and reaction of tail gas and purification liquid, preventing the leakage of harmful gases and environmental pollution. The sealing cover is used to seal the top opening of the purification chamber, preventing the leakage of harmful gases during the purification process, and also allowing for the cleaning of the internal purification liquid after tail gas purification is completed. The device also includes: A drive mechanism is installed inside the purification chamber. By installing the drive mechanism, the sealing cover can be rotated during operation, and during rotation, the exhaust gas to be purified is evenly sprayed into the purification liquid inside the purification chamber. Simultaneously, the purification liquid inside the purification chamber is agitated, achieving a uniform concentration distribution of the purification liquid. An atomizing mechanism is used to atomize and mix exhaust gas and purification liquid together. The atomizing mechanism is mounted on the upper surface of the sealing cover via a connecting bracket. By setting up the atomizing mechanism, the purification liquid and exhaust gas can be introduced into the inner cavity of the atomizing box separately during operation. At the same time, the force generated by high-speed rotation breaks the purification liquid into tiny droplets and mixes it thoroughly with the exhaust gas, achieving uniform atomization and mixing of the gas and liquid phases. Ultimately, this significantly increases the gas-liquid contact area and improves the exhaust gas purification efficiency. The drive mechanism includes a first stepper motor, which is disposed on the lower surface of the purification chamber. By including the first stepper motor, a stable rotation is achieved at its output end during operation. The atomizing mechanism includes an atomizing box and a rotating rod. The atomizing box is fixed to the top of the connecting frame and is inclined. The rotating rod is rotatably connected to the inner cavity of the atomizing box via a second rolling bearing. Turbine blades are fixed to the outer surface of the rotating rod and are rotatably connected to the inner cavity of the atomizing box. By setting up the atomizing box, it can serve as a gas-liquid atomization mixing chamber. Its inclined structure causes the atomized purified liquid and exhaust gas to converge at a lower position under gravity and eventually be discharged into the inner cavity of the purified box. The rotating rod allows for stable rotation within the atomizing box, thereby transmitting the rotational power of the second stepper motor to the turbine blades. The turbine blades, driven by the rotating rod, rotate at high speed, creating a negative pressure within the atomizing box. This draws the purified liquid and exhaust gas from the purified box into the atomizing box, and during high-speed rotation, the purified liquid is broken into tiny droplets and thoroughly mixed with the exhaust gas, achieving uniform atomization of the gas and liquid phases.

[0007] Preferably, the opening of the purification chamber has an annular groove, and a plurality of annularly arranged ball bearings are disposed on the side of the lower surface of the sealing cover, the ball bearings being slidably connected to the annular groove. By providing the annular groove at the opening of the purification chamber, it can cooperate with the annularly arranged ball bearings on the lower surface of the sealing cover, so that when the sealing cover rotates, the ball bearings roll along the annular groove, converting the sliding friction between the sealing cover and the purification chamber into rolling friction, reducing rotational resistance, ensuring smooth and stable rotation of the sealing cover, and preventing the sealing cover from tilting due to uneven force during rotation, thus ensuring the sealing performance between the sealing cover and the purification chamber.

[0008] Preferably, a three-way pipe runs through the outer surface of the purification chamber, and two control valves are respectively installed at the two openings of the three-way pipe furthest from the purification chamber. By setting up the three-way pipe, it can serve as both an exhaust and intake channel for exhaust gas and a replenishment channel for purification liquid. The control valves at the two openings of the three-way pipe can independently control the flow of gas and the replenishment of liquid. After purification is completed, the exhaust channel is opened by the control valve to discharge the purified gas. When purification liquid needs to be replenished, the inlet channel is opened by the control valve to replenish the purification chamber, thus achieving a dual-purpose function with one pipe.

[0009] Preferably, a first fixing frame is fixed to the outer surface of the first stepper motor, and the top end of the first fixing frame is fixed to the lower surface of the purification chamber. A rotating column is installed at the output end of the first stepper motor via a coupling. The rotating column is rotatably connected to the inner wall of the purification chamber via a first rolling bearing, and the top end of the rotating column extends into the inner cavity of the purification chamber and is tightly frictionally fitted. By setting the rotating column, the rotational power of the first stepper motor is transmitted to the inner cavity of the purification chamber. The first rolling bearing enables the rotating column to rotate more stably. The tight frictional fit between the top end of the rotating column and the inner cavity of the purification chamber ensures the sealing of the rotating column during rotation and prevents liquid in the purification chamber from leaking from the gap between the rotating column and the purification chamber.

[0010] Preferably, the rotating column has a hexagonal hole at one end of its position within the purification chamber, and a connecting column is fixed at the center of the lower surface of the sealing cover. The bottom end of the connecting column has a hexagonal protrusion that engages with the hexagonal hole at the top of the rotating column. This engagement of the hexagonal hole at the top of the rotating column with the hexagonal protrusion at the bottom of the connecting column enables rapid connection and power transmission between the rotating column and the sealing cover. When the sealing cover needs to be removed, simply lifting it allows the hexagonal protrusion to disengage from the hexagonal hole, achieving quick disassembly. When installation is required, inserting the hexagonal protrusion into the hexagonal hole enables power connection. The operation is simple and quick, and the hexagonal fit ensures reliable torque transmission and prevents slippage during rotation.

[0011] Preferably, the rotating rod has a pointed end located within the atomizing chamber. A limiting frame is rotatably connected to the pointed outer surface of the rotating rod, and the limiting frame is fixed to the inner wall of the atomizing chamber. A discharge pipe is fixed to the opening on the lower surface of the atomizing chamber, and the bottom end of the discharge pipe is frictionally fitted with the bottom surface of the purification chamber. The bottom end of the discharge pipe is a spherical shape with several holes. By making the rotating rod pointed at one end within the atomizing chamber, the atomized purified liquid and exhaust gas can be guided into the inner cavity of the discharge pipe. The limiting frame provides rotational support and axial restraint for the rotating rod, ensuring coaxiality and stability during rotation and preventing swaying during high-speed rotation. By setting up a discharge pipe, the atomized gas-liquid mixture in the atomizing box is guided to the inner cavity of the purification box. The spherical hole structure at the bottom of the discharge pipe allows the gas-liquid mixture to be sprayed out evenly from multiple directions, so that the atomized purification liquid and exhaust gas are sprayed into the purification liquid in the inner cavity of the purification box, increasing the spray coverage area and improving the contact efficiency between the exhaust gas and the purification liquid.

[0012] Preferably, a second fixing frame is fixed to the outer surface of the atomizing box, and a second stepper motor is fixed to the top of the second fixing frame. A drive wheel is provided at the output end of the second stepper motor, and a driven wheel is provided at the top of the rotating rod. The drive wheel is connected to the driven wheel via a belt. By providing the second stepper motor, the rotating rod can be driven to rotate stably during operation. The drive wheel, belt, and driven wheel transmit the rotational power of the second stepper motor to the rotating rod, achieving flexible power transmission. The belt drive provides buffering and overload protection, preventing damage to the second stepper motor when the turbine blades encounter obstruction.

[0013] Preferably, a fan-shaped wrapping box is fixed to the inner wall of the atomizing box, and a first connecting box penetrates the outer surface of the atomizing box. The first connecting box is connected to the inner cavity of the fan-shaped wrapping box, and an inlet pipe is connected to the side of the first connecting box away from the atomizing box. The inlet pipe passes through the sealing cover and extends to the bottom of the inner cavity of the purification box. By setting up the fan-shaped wrapping box as a temporary storage and distribution cavity for the purified liquid, the purified liquid is evenly guided into the inner cavity of the atomizing box to mix with the exhaust gas. By setting up the first connecting box, the inner cavity of the fan-shaped wrapping box is connected to the inlet pipe, and the purified liquid is transported from the inlet pipe to the inner cavity of the fan-shaped wrapping box. By setting up the inlet pipe, when a negative pressure is generated in the inner cavity of the atomizing box, the purified liquid stored at the bottom of the purification box is transported to the inner cavity of the fan-shaped wrapping box through the inlet pipe, realizing the recycling of the purified liquid.

[0014] Preferably, a second connecting box extends through the outer surface of the atomizing box. An air inlet pipe extends through one end of the second connecting box on the outer surface of the atomizing box. An air inlet head is fixedly installed at the end of the air inlet pipe away from the second connecting box. The air inlet head penetrates the upper surface of the sealing cover and extends to the lower surface of the sealing cover. A sealing ring is fixedly installed on the inner wall of the air inlet pipe. A plug head is slidably connected to the inner cavity of the sealing ring. Several annularly distributed springs are fixedly installed on the surface of the plug head, with the tops of the springs fixed to the inner wall of the sealing ring. By providing the air inlet pipe, when a negative pressure is generated in the inner cavity of the atomizing box, the exhaust gas to be treated at the top of the purification box can be guided into the inner cavity of the atomizing box. By providing the air inlet head, the exhaust gas in the purification box is transported to the inner cavity of the atomizing box through the air inlet head and the air inlet pipe. Simultaneously, several annularly arrayed vent holes are provided on the outer surface of the air inlet head, which, while allowing the exhaust gas to enter, obstructs splashing droplets. By incorporating a plug head that seals with a sealing ring under the action of a spring, when negative pressure is generated inside the atomizing chamber, the plug head overcomes the spring force and opens, allowing exhaust gas to enter the atomizing chamber. When there is no negative pressure inside the atomizing chamber, the plug head returns to its original position and seals under the action of the spring. By incorporating a spring, a return force is provided to the plug head, achieving the one-way flow function of the air intake pipe.

[0015] Preferably, the first sector-shaped box extends through both sides of the sector-shaped packaging box, and the second connecting box is located at one end of the atomizing box cavity and connected to the second sector-shaped box. The end of the second sector-shaped box is connected to the end of the first sector-shaped box. The sector-shaped packaging box, the first sector-shaped box, and the second sector-shaped box are arranged in a ring on the outer surface of the rotating rod. The inner arc surface of the first sector-shaped box has several arrayed liquid spray nozzles, and the inner arc surface of the second sector-shaped box has several arrayed air outlets. By setting the first sector-shaped box, the purified liquid in the sector-shaped packaging box is distributed to the inner cavity of the first sector-shaped box. Finally, the arrayed liquid spray nozzles on the inner arc surface of the first sector-shaped box evenly spray the purified liquid, so that the purified liquid is broken into tiny droplets under the rotation of the turbine blades. By setting the second sector-shaped box and connecting it to the second connecting box, the exhaust gas delivered by the intake pipe is distributed to the inner cavity of the second sector-shaped box. Then, the exhaust gas is evenly sprayed out from the arrayed air outlets on the inner arc surface of the second sector-shaped box and comes into contact with the purified liquid sprayed from the liquid spray nozzles at the first moment, thereby achieving the purification of the exhaust gas. The fan-shaped packaging box, the first fan-shaped box, and the second fan-shaped box are arranged in a ring on the outer surface of the rotating rod, so that the purification liquid and the exhaust gas can enter the inner cavity of the atomizing box evenly from multiple directions. Under the high-speed rotation of the turbine blades, they are fully mixed and atomized, which greatly increases the gas-liquid contact area and improves the exhaust gas purification efficiency.

[0016] This invention provides a tail gas purification and treatment device for petrochemical production. It has the following beneficial effects: I. This exhaust gas purification and treatment device for petrochemical production generates negative pressure by setting turbine blades to rotate at high speed in the atomization box cavity. With the help of the air inlet pipe and liquid inlet pipe, the exhaust gas at the top of the purification box cavity and the purification liquid at the bottom are respectively drawn into the atomization box cavity, achieving the effect of automatic suction and recycling of exhaust gas and purification liquid. There is no need to set up an additional air pump and liquid pump, which simplifies the equipment structure and reduces manufacturing costs and energy consumption.

[0017] II. This tail gas purification and treatment device for petrochemical production distributes the purification liquid to the first sector box and sprays it evenly from the array of distributed spray nozzles by setting up a sector-shaped enveloping box. In conjunction with the second sector box, the tail gas is evenly sprayed out from the array of distributed gas outlets. This achieves the effect of the purification liquid and tail gas entering the atomization box cavity evenly from multiple directions and coming into contact and mixing at the first moment. This allows the gas and liquid phases to be fully atomized and mixed under the high-speed rotation of the turbine blades, which greatly increases the gas-liquid contact area and significantly improves the tail gas purification efficiency.

[0018] Third, this tail gas purification and treatment device for petrochemical production, by setting an atomization mechanism, can introduce the purification liquid and tail gas into the inner cavity of the atomization box separately during operation. At the same time, the force generated by high-speed rotation breaks the purification liquid into tiny droplets and mixes them thoroughly with the tail gas, realizing uniform atomization and mixing of the gas and liquid phases. Ultimately, it can significantly increase the gas-liquid contact area and improve the tail gas purification efficiency.

[0019] IV. This tail gas purification and treatment device for petrochemical production uses a stepper motor to drive a rotating column, which in turn rotates the sealing cover and atomizing mechanism as a whole. In conjunction with the rolling balls on the lower surface of the sealing cover rolling along the annular groove at the opening of the purification chamber, the atomizing mechanism achieves the effect of evenly extracting the tail gas from the top of the purification chamber cavity. At the same time, the atomized gas-liquid mixture is evenly sprayed into the purification liquid inside the purification chamber cavity. Meanwhile, the rotating discharge pipe agitates the purification liquid, making the concentration distribution of the purification liquid uniform, further improving the contact efficiency and purification effect between the tail gas and the purification liquid. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of a tail gas purification and treatment device for petrochemical production according to the present invention. Figure 2 This is a front view of the structure of a tail gas purification and treatment device for petrochemical production according to the present invention. Figure 3 This is a schematic diagram of the first fixing frame structure of the present invention; Figure 4 This is a schematic diagram of the sealing cap structure of the present invention; Figure 5 This is a schematic diagram of the atomizing mechanism of the present invention; Figure 6 This is a schematic diagram of the turbine blade structure of the present invention; Figure 7 This is a schematic cross-sectional view of the atomizing mechanism of the present invention; Figure 8 This is a schematic diagram of the first sector-shaped box structure of the present invention; Figure 9 This is a schematic diagram of the structure of the first sector box and the second sector box of the present invention; Figure 10 For the present invention Figure 9 Enlarged schematic diagram of structure A in the middle.

[0021] In the diagram: 1. Purification box; 2. Frame; 3. Sealing cover; 4. Ball bearing; 5. T-connector; 6. Drive mechanism; 61. First fixed frame; 62. First stepper motor; 63. Rotating column; 64. Connecting column; 7. Connecting frame; 8. Atomizing mechanism; 81. Atomizing box; 82. Second fixed frame; 83. Second stepper motor; 84. Belt; 85. Rotating rod; 86. Turbine blade; 87. Limiting frame; 88. Discharge pipe; 89. First connecting box; 810. Liquid inlet pipe; 811. Fan-shaped packaging box; 812. First fan-shaped box; 813. Spray nozzle; 814. Second connecting box; 815. Air inlet pipe; 816. Air inlet head; 817. Second fan-shaped box; 818. Air outlet; 819. Plug head; 820. Spring; 821. Sealing ring. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0023] like Figures 1-10 As shown, the present invention provides a technical solution: a tail gas purification and treatment device for petrochemical production, including a purification chamber 1, a frame 2 symmetrically fixed on the outer surface of the purification chamber 1, and a sealing cover 3 rotatably connected to the opening of the purification chamber 1. By setting up the purification chamber 1, it provides a closed space for the reaction chamber of the entire tail gas purification and treatment device, allowing for the mixing and reaction of tail gas and purification liquid, preventing the leakage of harmful gases and environmental pollution. The sealing cover 3 is used to seal the top opening of the purification chamber 1, preventing the leakage of harmful gases during the purification process, and also allowing for the cleaning of the internal purification liquid after the tail gas purification is completed. The device also includes: The drive mechanism 6 is located inside the purification chamber 1. By setting the drive mechanism 6, the sealing cover 3 can be rotated during operation, and during the rotation, the exhaust gas to be purified is evenly sprayed into the purification liquid inside the purification chamber 1. At the same time, the purification liquid inside the purification chamber 1 is stirred to achieve the effect of uniform concentration distribution of the purification liquid. The drive mechanism 6 includes a first stepper motor 62, which is disposed on the lower surface of the purification chamber 1. By setting the first stepper motor 62, its output end can generate stable rotation during operation. The opening of the purification chamber 1 is provided with an annular groove, and a plurality of annularly arranged ball bearings 4 are provided on the side of the lower surface of the sealing cover 3. The ball bearings 4 are slidably connected to the annular groove. By providing an annular groove at the opening of the purification chamber 1, the ball bearings 4 can cooperate with the annularly arranged ball bearings 4 on the lower surface of the sealing cover 3, so that when the sealing cover 3 rotates, the ball bearings 4 roll along the annular groove, converting the sliding friction between the sealing cover 3 and the purification chamber 1 into rolling friction, reducing rotational resistance, ensuring that the sealing cover 3 rotates smoothly and stably, and preventing the sealing cover 3 from tilting due to uneven force during rotation, thus ensuring the sealing performance between the sealing cover 3 and the purification chamber 1.

[0024] A three-way pipe 5 runs through the outer surface of the purification chamber 1. Two control valves are respectively installed at the two openings of the three-way pipe 5 furthest from the purification chamber 1. By setting up the three-way pipe 5, it can serve as a channel for exhaust and inlet of exhaust gas and a channel for replenishing purification liquid. The control valves at the two openings of the three-way pipe 5 can independently control the flow of gas and the replenishment of liquid. When the purification process is completed, the exhaust channel is opened by the control valve to discharge the purified gas. When it is necessary to replenish the purification liquid, the inlet channel is opened by the control valve to replenish the purification liquid into the purification chamber 1, realizing the dual function of one pipe.

[0025] A first fixing bracket 61 is fixed to the outer surface of the first stepper motor 62. The top end of the first fixing bracket 61 is fixed to the lower surface of the purification chamber 1. A rotating column 63 is installed at the output end of the first stepper motor 62 via a coupling. The rotating column 63 is rotatably connected to the inner wall of the purification chamber 1 via a first rolling bearing. The top end of the rotating column 63 extends into the inner cavity of the purification chamber 1 and is tightly fitted with friction. By setting the rotating column 63, the rotational power of the first stepper motor 62 is transmitted to the inner cavity of the purification chamber 1. The first rolling bearing enables the rotating column 63 to rotate more stably. The tight friction between the top end of the rotating column 63 and the inner cavity of the purification chamber 1 ensures the sealing of the rotating column 63 during rotation and prevents liquid in the purification chamber 1 from leaking from the gap between the rotating column 63 and the purification chamber 1.

[0026] The rotating column 63 has a hexagonal hole at one end of its inner cavity in the purification chamber 1. A connecting column 64 is fixed at the center of the lower surface of the sealing cover 3. The bottom end of the connecting column 64 has a hexagonal protrusion that is matched with the hexagonal hole at the top of the rotating column 63. By matching the hexagonal hole at the top of the rotating column 63 with the hexagonal protrusion at the bottom of the connecting column 64, a quick connection and power transmission between the rotating column 63 and the sealing cover 3 are achieved. When the sealing cover 3 needs to be removed, simply lift the sealing cover 3 upwards to allow the hexagonal protrusion to disengage from the hexagonal hole, achieving quick disassembly. When installation is required, insert the hexagonal protrusion into the hexagonal hole to achieve power connection. The operation is simple and quick, and the hexagonal fit ensures the reliability of torque transmission and prevents slippage during rotation.

[0027] The exhaust gas purification device for petrochemical production also includes an atomizing mechanism 8, which atomizes and mixes the exhaust gas and purification liquid together. The atomizing mechanism 8 is mounted on the upper surface of the sealing cover 3 via a connecting frame 7. By setting the atomizing mechanism 8, the purification liquid and exhaust gas can be introduced into the inner cavity of the atomizing box 81 respectively during operation. At the same time, the force generated by high-speed rotation breaks the purification liquid into tiny droplets and mixes them thoroughly with the exhaust gas, achieving uniform atomization and mixing of the gas and liquid phases. Ultimately, this significantly increases the gas-liquid contact area and improves the exhaust gas purification efficiency. The atomizing mechanism 8 includes an atomizing box 81 and a rotating rod 85. The atomizing box 81 is fixed to the top of the connecting frame 7 and is inclined. The rotating rod 85 is rotatably connected to the inner cavity of the atomizing box 81 via a second rolling bearing. A turbine blade 86 is fixed to the outer surface of the rotating rod 85 and is rotatably connected to the inner cavity of the atomizing box 81. By setting the atomizing box 81, it can serve as a gas-liquid atomization mixing chamber. Its inclined structure causes the atomized purified liquid and exhaust gas to converge at a lower position under the action of gravity and finally be discharged into the inner cavity of the purification box 1. By setting the rotating rod 85, it can rotate smoothly within the atomizing box 81, thereby transmitting the rotational power of the second stepper motor 83 to the turbine blade 86. By setting turbine blades 86, which rotate at high speed under the drive of rotating rod 85, negative pressure is generated in the inner cavity of atomizing box 81, so that the purification liquid and exhaust gas in the inner cavity of purification box 1 are drawn into the inner cavity of atomizing box 81. When rotating at high speed, the purification liquid is broken into tiny droplets and fully mixed with the exhaust gas, so as to achieve uniform atomization of gas and liquid phases.

[0028] The rotating rod 85 has a pointed end located within the atomizing box 81. A limiting frame 87 is rotatably connected to the pointed outer surface of the rotating rod 85. The limiting frame 87 is fixed to the inner wall of the atomizing box 81. A discharge pipe 88 is fixed to the opening on the lower surface of the atomizing box 81. The bottom end of the discharge pipe 88 is frictionally fitted with the bottom surface of the purification box 1. The bottom end of the discharge pipe 88 is spherical with several holes. By making the rotating rod 85 pointed at one end within the atomizing box 81, the atomized purified liquid and exhaust gas can be guided into the inner cavity of the discharge pipe 88. The limiting frame 87 provides rotational support and axial limitation for the rotating rod 85, ensuring coaxiality and stability during rotation and preventing swaying of the rotating rod 85 during high-speed rotation. By setting up the discharge pipe 88, the atomized gas-liquid mixture in the atomizing box 81 is guided to the inner cavity of the purification box 1. The spherical hole structure at the bottom of the discharge pipe 88 allows the gas-liquid mixture to be sprayed out evenly from multiple directions, so that the atomized purification liquid and exhaust gas are sprayed into the purification liquid in the inner cavity of the purification box 1, increasing the spray coverage area and improving the contact efficiency between the exhaust gas and the purification liquid.

[0029] A second fixing frame 82 is fixed to the outer surface of the atomizing box 81. A second stepper motor 83 is fixed to the top of the second fixing frame 82. A drive wheel is provided at the output end of the second stepper motor 83, and a driven wheel is provided at the top of the rotating rod 85. The drive wheel is connected to the driven wheel via a belt 84. By setting the second stepper motor 83, the rotating rod 85 can be driven to produce stable rotation during operation. By setting the drive wheel, belt 84, and driven wheel, the rotational power of the second stepper motor 83 is transmitted to the rotating rod 85, realizing flexible power transmission. The belt 84 transmission has a buffering and overload protection function, preventing the turbine blades 86 from damaging the second stepper motor 83 when encountering obstruction.

[0030] A fan-shaped packaging box 811 is fixed to the inner wall of the atomizing box 81. A first connecting box 89 penetrates the outer surface of the atomizing box 81, and the first connecting box 89 is connected to the inner cavity of the fan-shaped packaging box 811. A liquid inlet pipe 810 penetrates the side of the first connecting box 89 away from the atomizing box 81, and the liquid inlet pipe 810 penetrates the sealing cover 3 and extends to the bottom of the inner cavity of the purification box 1. By setting up the fan-shaped packaging box 811, it serves as a temporary storage and distribution cavity for the purified liquid, and the purified liquid is evenly guided into the inner cavity of the atomizing box 81 to mix with the exhaust gas. By setting up the first connecting box 89, the inner cavity of the fan-shaped packaging box 811 is connected to the liquid inlet pipe 810, and the purified liquid is transported from the liquid inlet pipe 810 to the inner cavity of the fan-shaped packaging box 811. By setting up the liquid inlet pipe 810, when a negative pressure is generated in the inner cavity of the atomizing box 81, the purified liquid stored at the bottom of the purification box 1 is transported through the liquid inlet pipe 810 to the inner cavity of the fan-shaped wrapping box 811, thereby realizing the recycling of the purified liquid.

[0031] A second connecting box 814 penetrates the outer surface of the atomizing box 81. An air inlet pipe 815 penetrates one end of the second connecting box 814 on the outer surface of the atomizing box 81. An air inlet head 816 is fixedly installed at the end of the air inlet pipe 815 away from the second connecting box 814. The air inlet head 816 penetrates the upper surface of the sealing cover 3 and extends to the lower surface of the sealing cover 3. A sealing ring 821 is fixedly installed on the inner wall of the air inlet pipe 815. A plug head 819 is slidably connected to the inner cavity of the sealing ring 821. Several annularly distributed springs 820 are fixedly installed on the surface of the plug head 819. The top ends of the springs 820 are fixed to the inner wall of the sealing ring 821. By providing the air inlet pipe 815, when a negative pressure is generated in the inner cavity of the atomizing box 81, the exhaust gas to be treated at the top of the purification box 1 can be guided into the inner cavity of the atomizing box 81. By setting an air inlet head 816, the exhaust gas in the inner cavity of the purification box 1 is transported to the inner cavity of the atomizing box 81 through the air inlet head 816 and the air inlet pipe 815. Simultaneously, the outer surface of the air inlet head 816 has several annularly arrayed vent holes, which allow the exhaust gas to enter while obstructing splashing droplets. By setting a plug head 819, it seals with the sealing ring 821 under the action of the spring 820. When a negative pressure is generated in the inner cavity of the atomizing box 81, the plug head 819 overcomes the spring force of the spring 820 and opens, allowing the exhaust gas to enter the inner cavity of the atomizing box 81; when there is no negative pressure in the inner cavity of the atomizing box 81, the plug head 819 returns to its original sealing position under the action of the spring 820. By setting the spring 820, a return force is provided for the plug head 819, realizing the unidirectional conduction function of the air inlet pipe 815.

[0032] The fan-shaped packaging box 811 has a first fan-shaped box 812 extending through both sides. The second connecting box 814 is located at one end of the inner cavity of the atomizing box 81 and is connected to a second fan-shaped box 817. The end of the second fan-shaped box 817 is connected to the end of the first fan-shaped box 812. The fan-shaped packaging box 811, the first fan-shaped box 812, and the second fan-shaped box 817 are arranged in a ring on the outer surface of the rotating rod 85. The inner arc surface of the first fan-shaped box 812 has several arrayed liquid spray nozzles 813 extending through it, and the inner arc surface of the second fan-shaped box 817 has several arrayed air outlets 818 extending through it. By setting the first fan-shaped box 812, the purified liquid in the fan-shaped packaging box 811 is distributed to the inner cavity of the first fan-shaped box 812. Finally, the arrayed liquid spray nozzles 813 on the inner arc surface of the first fan-shaped box 812 spray the purified liquid evenly, so that the purified liquid is broken into tiny droplets under the rotation of the turbine blades 86. By setting up a second sector box 817 and connecting it to a second connecting box 814, the exhaust gas delivered by the intake pipe 815 is distributed into the inner cavity of the second sector box 817. Then, the exhaust gas is evenly sprayed out from the array of air outlets 818 on the inner arc surface of the second sector box 817, and comes into immediate contact with the purification liquid sprayed from the liquid spraying port 813, thus achieving the purification of the exhaust gas. The sector box 811, the first sector box 812, and the second sector box 817 are arranged in a ring on the outer surface of the rotating rod 85, so that the purification liquid and exhaust gas can enter the inner cavity of the atomizing box 81 evenly from multiple directions. Under the high-speed rotation of the turbine blades 86, they are fully mixed and atomized, greatly increasing the gas-liquid contact area and improving the exhaust gas purification efficiency.

[0033] Working principle: In the initial state, the bottom of the inner cavity of the purification box 1 stores an appropriate amount of purification liquid. The sealing cover 3 is engaged with the hexagonal protrusion at the bottom of the connecting column 64 and the hexagonal hole at the top of the rotating column 63, realizing the rapid power connection between the sealing cover 3 and the drive mechanism 6. When the first stepper motor 62 is started, its output end drives the sealing cover 3 and the atomizing mechanism 8 installed above the sealing cover 3 to rotate as a whole through the rotating column 63. Simultaneously, the second stepper motor 83 is activated, driving the rotating rod 85 to rotate at high speed via the driving wheel, belt 84, and driven wheel, thereby causing the turbine blades 86 to rotate synchronously. The high-speed rotation of the turbine blades 86 generates negative pressure inside the atomizing box 81, which acts on the inner cavity of the purification box 1 through the air inlet pipe 815 and the liquid inlet pipe 810 respectively. Under the action of negative pressure, the exhaust gas to be treated at the top of the inner cavity of the purification box 1 enters the air inlet pipe 815 through the air inlet head 816. After entering the air inlet pipe 815, the exhaust gas overcomes the elastic force of the spring 820 and pushes the plug head 819 away from the sealing ring 821, making the air inlet pipe 815 unidirectionally open. The exhaust gas enters the second sector box 817 through the second connecting box 814, and is finally evenly sprayed out from the array of air outlets 818 on the inner arc surface of the second sector box 817.

[0034] Meanwhile, the purification liquid at the bottom of the inner cavity of the purification box 1 enters the first connecting box 89 through the inlet pipe 810 under negative pressure, and then enters the inner cavity of the fan-shaped packaging box 811. The fan-shaped packaging box 811 distributes the purification liquid to the first fan-shaped boxes 812 on both sides, and finally sprays it evenly from the array of spray nozzles 813 on the inner arc surface of the first fan-shaped box 812. The sprayed purification liquid and the exhaust gas sprayed from the exhaust port 818 come into full contact under the high-speed rotation of the turbine blades 86. The turbine blades 86 break the purification liquid into tiny droplets, achieving uniform atomization and mixing of the gas and liquid phases with the exhaust gas, greatly increasing the gas-liquid contact area.

[0035] The atomized gas-liquid mixture, under the influence of gravity, collects along the inner wall of the inclined atomizing box 81 and flows into the discharge pipe 88. From multiple directions, it is evenly sprayed into the purification liquid inside the purification box 1 through a spherical hole at the bottom of the discharge pipe 88. The sprayed gas-liquid mixture undergoes further absorption in the purification liquid, and harmful components in the exhaust gas are absorbed by the purification liquid.

[0036] When the purification liquid needs to be replenished, the inlet channel is opened through the control valve to replenish the purification liquid into the purification tank 1; after the purification process is completed, the exhaust channel is opened through the control valve to discharge the purified gas.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A tail gas purification and treatment device for petrochemical production, comprising a purification box (1), wherein a frame (2) is symmetrically fixed on the outer surface of the purification box (1), and a sealing cover (3) is rotatably connected to the opening of the purification box (1), characterized in that, Also includes: A drive mechanism (6) is provided in the inner cavity of the purification box (1); Atomizing mechanism (8) is used to atomize and mix exhaust gas and purification liquid together. The atomizing mechanism (8) is set on the upper surface of the sealing cover (3) via a connecting bracket (7). The drive mechanism (6) includes a first stepper motor (62), which is disposed on the lower surface of the purification box (1); The atomizing mechanism (8) includes an atomizing box (81) and a rotating rod (85). The atomizing box (81) is fixed at the top of the connecting frame (7) and is inclined. The rotating rod (85) is rotatably connected to the inner cavity of the atomizing box (81) through a second rolling bearing. A turbine blade (86) is fixed on the outer surface of the rotating rod (85) and is rotatably connected to the inner cavity of the atomizing box (81).

2. The tail gas purification and treatment device for petrochemical production according to claim 1, characterized in that: The purification box (1) has an annular groove at its opening, and a number of annularly arranged balls (4) are provided on the side of the lower surface of the sealing cover (3). The balls (4) are slidably connected to the annular groove.

3. The tail gas purification and treatment device for petrochemical production according to claim 1, characterized in that: A three-way pipe (5) runs through the outer surface of the purification box (1), and two control valves are respectively installed at the two openings of the three-way pipe (5) away from the purification box (1).

4. The tail gas purification and treatment device for petrochemical production according to claim 1, characterized in that: The outer surface of the first stepper motor (62) is fixed with a first fixing frame (61), the top of the first fixing frame (61) is fixed on the lower surface of the purification box (1), the output end of the first stepper motor (62) is equipped with a rotating column (63) through a coupling, the rotating column (63) is rotatably connected to the inner wall of the purification box (1) through a first rolling bearing, and the top of the rotating column (63) extends into the inner cavity of the purification box (1) and fits tightly with friction.

5. A tail gas purification and treatment device for petrochemical production according to claim 4, characterized in that: The rotating column (63) has a hexagonal hole at one end of the inner cavity of the purification box (1). A connecting column (64) is fixed at the center of the lower surface of the sealing cover (3). A hexagonal protrusion is provided at the bottom of the connecting column (64). The hexagonal protrusion at the bottom of the connecting column (64) is matched with the hexagonal hole at the top of the rotating column (63).

6. The tail gas purification and treatment device for petrochemical production according to claim 1, characterized in that: The rotating rod (85) is pointed at one end of the cavity of the atomizing box (81). The outer surface of the pointed rotating rod (85) is rotatably connected to the limiting frame (87). The limiting frame (87) is fixed to the inner wall of the atomizing box (81). The discharge pipe (88) is fixed at the opening on the lower surface of the atomizing box (81). The bottom end of the discharge pipe (88) is rubbed and adapted to the bottom surface of the cavity of the purification box (1). The bottom end of the discharge pipe (88) is a sphere with several holes.

7. The tail gas purification and treatment device for petrochemical production according to claim 1, characterized in that: The outer surface of the atomizing box (81) is fixed with a second fixing frame (82), and the top of the second fixing frame (82) is fixed with a second stepper motor (83). The output end of the second stepper motor (83) is provided with a drive wheel, and the top of the rotating rod (85) is provided with a driven wheel. The drive wheel is connected to the driven wheel through a belt (84).

8. The tail gas purification and treatment device for petrochemical production according to claim 1, characterized in that: A fan-shaped wrapping box (811) is fixedly provided on the inner wall of the atomizing box (81). A first connecting box (89) is provided through the outer surface of the atomizing box (81). The first connecting box (89) is connected to the inner cavity of the fan-shaped wrapping box (811). An inlet pipe (810) is provided through the side of the first connecting box (89) away from the atomizing box (81). The inlet pipe (810) passes through the sealing cover (3) and extends to the bottom of the inner cavity of the purification box (1).

9. A tail gas purification and treatment device for petrochemical production according to claim 8, characterized in that: The outer surface of the atomizing box (81) is penetrated by a second connecting box (814). One end of the second connecting box (814) located on the outer surface of the atomizing box (81) is connected by an air inlet pipe (815). An air inlet head (816) is fixedly provided at the end of the air inlet pipe (815) away from the second connecting box (814). The air inlet head (816) penetrates the upper surface of the sealing cover (3) and extends to the lower surface of the sealing cover (3). A sealing ring (821) is fixedly provided on the inner wall of the air inlet pipe (815). A plug head (819) is slidably connected to the inner cavity of the sealing ring (821). Several annularly distributed springs (820) are fixedly provided on the surface of the plug head (819). The top of the springs (820) is fixedly provided on the inner wall of the sealing ring (821).

10. A tail gas purification and treatment device for petrochemical production according to claim 9, characterized in that: The fan-shaped packaging box (811) has a first fan-shaped box (812) running through both sides. The second connecting box (814) is located at one end of the inner cavity of the atomizing box (81) and is connected to the second fan-shaped box (817). The end of the second fan-shaped box (817) is connected to the end of the first fan-shaped box (812). The fan-shaped packaging box (811), the first fan-shaped box (812) and the second fan-shaped box (817) are arranged in a ring on the outer surface of the rotating rod (85). The inner arc surface of the first fan-shaped box (812) has a number of arrayed liquid spray nozzles (813) running through it. The inner arc surface of the second fan-shaped box (817) has a number of arrayed air outlets (818) running through it.

Images