Tail gas separation and purification device of formwork roasting dewaxing equipment

Abstract

The invention relates to the technical field of tail gas separation and purification devices, and discloses a tail gas separation and purification device of mold shell roasting dewaxing equipment, the tail gas separation and purification device comprises a tower body, the tower body is internally provided with a dust falling cavity and a treatment cavity which are isolated from each other from top to bottom, and the top of the treatment cavity is provided with a variable frequency transmission system; a variable-frequency driving frame capable of moving in a reciprocating mode in the axis direction of the tower body and a rotatable solenoid are installed on the variable-frequency transmission system in a transmission mode, the solenoid is rotatably installed on the variable-frequency driving frame, a first torsional spring is arranged at the rotary connecting position of the solenoid and the variable-frequency driving frame, a hollow shaft is rotatably installed on the inner wall of the solenoid, and a rotating shaft is rotatably installed on the inner wall of the hollow shaft. And the hollow shaft and the rotating shaft are linked with the solenoid. The problems of low purification efficiency, frequent maintenance, high energy consumption, short service life and the like of an existing tail gas treatment device are systematically solved through five core technologies of dynamic adjustment, anti-blocking optimization, contact strengthening, energy conservation and consumption reduction and module cooperation.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas separation and purification devices, and more specifically, to a tail gas separation and purification device for shell baking and dewaxing equipment. Background Art

[0002] Dewaxing precision casting is a casting method in which a wax mold is made into the desired shape, and then the shell mold that reaches a certain hardness and strength is placed in an electric dewaxing kettle. The wax in the shell mold is melted under the high temperature and high pressure of the dewaxing kettle and flows into the dehydration purification system. After passing the treatment, it is transported back to the wax injection machine for recycling, and then molten metal is injected into the empty shell to form a casting. During the dewaxing precision casting process, natural gas roasting equipment is required to roast the mold shell, and exhaust gas will be generated during the roasting process. The exhaust gas generated during the roasting process may contain pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter. If these pollutants are directly discharged without treatment, they will cause significant pollution to the atmospheric environment.

[0003] In the prior art, there are many types of tail gas treatment devices, such as the silicon carbide sintering furnace with Chinese patent number CN210356560U. However, the existing tail gas treatment devices have the following technical problems when used:

[0004] Poor compatibility between purification efficiency and operating conditions: Existing devices use a fixed-frequency transmission system, making it impossible to dynamically adjust purification intensity based on exhaust pollutant concentrations. The nozzles used in exhaust gas-liquid treatment are prone to clogging and require frequent maintenance, resulting in uneven gas-liquid contact. To improve purification efficiency, traditional devices often operate in a continuous high-speed mode, resulting in high energy consumption, accelerated mechanical wear, and a lack of energy-saving optimization mechanisms.

[0005] Based on this, the present invention provides an exhaust gas separation and purification device for a shell roasting and dewaxing device to solve the technical problems raised in the above background technology. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, the present invention provides an exhaust gas separation and purification device for shell roasting and dewaxing equipment. The present invention systematically solves the problems of low purification efficiency, frequent maintenance, high energy consumption and short life of existing exhaust gas treatment devices through five core technologies: dynamic adjustment, anti-blocking optimization, contact enhancement, energy saving and consumption reduction, and module collaboration.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an exhaust gas separation and purification device for shell baking and dewaxing equipment, comprising a tower body, wherein the interior of the tower body is provided with a dust reduction chamber and a processing chamber isolated from each other from top to bottom, the top of the processing chamber is provided with a variable frequency transmission system, the variable frequency transmission system is provided with a variable frequency drive frame that can move back and forth along the axis of the tower body and a rotatable spiral tube, the spiral tube is rotatably installed on the variable frequency drive frame, and the rotation connection between the spiral tube and the variable frequency drive frame is provided with a A first torsion spring, a hollow shaft is rotatably mounted on the inner wall of the solenoid, a rotating shaft is rotatably mounted on the inner wall of the hollow shaft, the hollow shaft and the rotating shaft are both linked to the solenoid, a reciprocating seat that can reciprocate up and down is installed on the solenoid, the reciprocating stroke and reciprocating frequency of the reciprocating seat and the frequency conversion drive frame change periodically, a driven rotating ring is rotatably sleeved on the reciprocating seat, a rotating seat is installed at the bottom end of the rotating shaft, a purification system is installed on the rotating seat, and an active bevel gear ring is installed at the bottom of the hollow shaft;

[0008] The purification system includes a fixed nozzle and a joint hinged to a swivel seat, two hinge shafts are installed on the joint, both hinge shafts are hinged to the swivel seat, a connecting arm is hinged between the fixed nozzle and the driven swivel, a rotary nozzle is rotatably connected to the joint, the rotary nozzle is rotatably connected to the fixed nozzle through a bearing, the rotary nozzle is connected to the active bevel gear ring through a linkage module, a group of fixed nozzles are installed at the end of the fixed nozzle, and a rotary nozzle is installed at the end of the rotary nozzle;

[0009] The tower body is provided with a flow guide component which drives the tail gas to flow out through the dust reduction chamber, the fixed nozzle, the rotating nozzle and the processing chamber in sequence.

[0010] As a preferred technical solution of the present invention, the dust reduction chamber is filled with dust reduction liquid, which is an electrostatic adsorption liquid. The dust reduction liquid is used for electrostatic adsorption of exhaust gas particulate matter. Sodium hydroxide solution is stored in the treatment chamber, which is used to absorb sulfur dioxide and nitrogen oxides in the exhaust gas. A sewage valve is connected to the dust reduction chamber and the treatment chamber.

[0011] As an optimal technical solution of the present invention, the frequency conversion transmission system includes a motor installed on the tower body and a servo shaft and a frequency conversion shaft rotatably connected to the tower body, the output shaft end of the motor is connected to the servo shaft through a first transmission toothed belt, the servo shaft is respectively installed with a staggered arc surface large gear and an arc surface small gear, two symmetrically arranged frequency conversion interruption zones are provided on the servo shaft and at positions corresponding to the positions between the arc surface large gear and the arc surface small gear, a low-frequency gear meshing with the arc surface small gear and a high-frequency gear meshing with the arc surface large gear are respectively installed on the frequency conversion shaft, two ball screws are rotatably installed on the tower body, a second transmission toothed belt is installed on the frequency conversion shaft, the two ball screws are both connected to the second transmission toothed belt, a second torsion spring is provided at the rotation connection between the two ball screws and the tower body, and the two ball screws are both connected to the frequency conversion drive frame.

[0012] As a preferred technical solution of the present invention, the central angle corresponding to the arcuate large gear is 240°, the central angle corresponding to the arcuate small gear is 60°, the central angles corresponding to the two frequency conversion interruption zones are both 30°, the radius of the arcuate small gear is 1.5 to 2.5 times the radius of the low-frequency gear, and the radius of the arcuate large gear is 9 to 12 times the radius of the high-frequency gear.

[0013] As a preferred technical solution of the present invention, the frequency conversion transmission system also includes a follower sleeve rotatably connected to the frequency conversion drive frame, a sliding coupling groove with openings at both ends is fixedly opened inside the follower sleeve, a coupling groove section slidably connected to the sliding coupling groove is fixedly provided on the frequency conversion shaft, the cross-sections of the coupling groove section and the sliding coupling groove are both regular hexagons, and a third transmission toothed belt is connected for transmission between the follower sleeve and the solenoid.

[0014] As a preferred technical solution of the present invention, it also includes a synchronous shaft rotatably connected to the frequency conversion drive frame, a first bevel gear is installed on the synchronous shaft, a second bevel gear is installed on the solenoid and the hollow shaft, the two second bevel gears are both transmission-connected to the first bevel gear, the two second bevel gears are symmetrically arranged with the horizontal plane where the axis of the synchronous shaft is located as the axis, a third bevel gear is installed on the synchronous shaft and the rotating shaft, and the two third bevel gears are orthogonally meshed.

[0015] As a preferred technical solution of the present invention, the linkage module includes two hinge shafts installed on the joint, a conical shaft rotatably connected to the swivel seat, and a first belt shaft. The two hinge shafts are hinged to the swivel seat, and the conical shafts are respectively provided with a first conical tooth surface and a second conical tooth surface. The first conical tooth surface is meshed with the active bevel gear ring. The first belt shaft is installed with a fourth bevel gear connected to the second bevel tooth surface for transmission. The first belt shaft is connected to the second belt shaft for transmission through a fifth synchronous toothed belt. The second belt shaft and the rotary spray pipe are both installed with a fifth bevel gear, and the two fifth bevel gears are meshed with each other.

[0016] The grill is a side panel that is located adjacent to the fan, and a tube that connects the fan and the control cabinet, and the side panels, connected to the grill, have a top view of the grill in the form of a through-hole, and a bottom view of the grill being connected to the fan.

[0017] As a preferred technical solution of the present invention, it also includes a group of turbulence enhancement disks installed on the fixed nozzle, each of the turbulence enhancement disks is provided with a group of turbulence holes, and a group of ultrasonic vibrators distributed in a circular array are installed inside the dust reduction chamber.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention uses an innovatively designed variable frequency drive system to adjust the purification intensity in real time according to the concentration of exhaust pollutants. The alternating meshing of the large arc gear and the high-frequency gear, and the small arc gear and the low-frequency gear on the servo shaft, combined with the periodic frequency conversion interruption zone, drives the frequency conversion drive frame and the reciprocating seat to dynamically switch between high-frequency large stroke and low-frequency small stroke modes. In the high-frequency mode, the rotating nozzle generates fine atomized droplets, greatly increasing the gas-liquid contact area and accelerating the neutralization reaction of sulfur dioxide and nitrogen oxides. In the low-frequency mode, the fixed nozzle expands the coverage of the purification liquid, prolongs the reaction time, and ensures adsorption uniformity. This dynamic adjustment mechanism breaks through the limitations of low efficiency and poor adaptability of traditional fixed-frequency purification devices, and achieves high-precision matching of purification efficiency and working conditions. It is particularly suitable for complex working conditions with large fluctuations in pollutant concentrations.

[0020] 2. To address the problem of easy nozzle clogging, the present invention achieves multi-dimensional anti-clogging through the synergistic effect of periodic switching of rotation direction, disturbance of turbulence enhancement disk and ultrasonic vibrator. The periodic rotation direction change of the turntable drives the fixed nozzle to swing at multiple angles. Combined with the rotating spray of the rotary nozzle, an interlaced atomization layer is formed to avoid local deposition of particulate matter. The turbulence enhancement disk on the fixed nozzle disturbs the liquid flow through the turbulent hole to break the stable attachment of the liquid film. The ultrasonic vibrator in the dust reduction chamber enhances the activity of the dust reduction liquid through high-frequency vibration and strengthens the dispersion of particulate matter. The above design significantly reduces the risk of nozzle scaling. Compared with the traditional single spraying method, the maintenance cycle is effectively extended and the operating stability is significantly improved.

[0021] 3. The present invention achieves full coverage of gas-liquid contact through the coordinated design of fixed nozzles and rotating nozzles, combined with the multi-directional movement of the variable frequency drive frame. The fixed nozzle sprays parallel to the axis to form a directional purification layer, and the rotating nozzle rotates and sprays at a 45° angle to form a spiral atomization area, thereby expanding the contact path between the exhaust gas and the purified liquid. At the same time, the uniform flow design of the gas chamber and the corrugated duct ensures uniform distribution of the exhaust gas. Compared with the contact dead angle caused by unidirectional injection in the prior art, the present invention significantly improves the gas-liquid mixing efficiency and the removal rate of sulfur dioxide and nitrogen oxides.

[0022] 4. The present invention achieves dynamic optimization of energy consumption through alternating high and low frequency operating modes. The high-frequency mode is only enabled when the pollutant concentration peaks, and the low-frequency mode is adapted to conventional operating conditions. Combined with the intermittent transmission in the frequency conversion interruption zone, the overall energy consumption is effectively reduced. In addition, the periodic switching of rotation direction and rotation speed effectively disperses the unidirectional stress of the transmission components and reduces continuous high-speed friction loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of an exhaust gas separation and purification device for a shell roasting and dewaxing device according to the present invention;

[0024] Figure 2 For the present invention Figure 1 Schematic diagram of the cross-section structure;

[0025] Figure 3 For the present invention Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0026] Figure 4 For the present invention Figure 2 Schematic diagram of the local enlarged structure at B in the middle;

[0027] Figure 5 For the present invention Figure 2 Schematic diagram of the local enlarged structure at C in the middle;

[0028] Figure 6 A schematic structural diagram of the frequency conversion drive frame and the second torsion spring of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the frequency conversion shaft and the frequency conversion drive frame of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the synchronous shaft and the corrugated conduit of the present invention;

[0031] Figure 9 For the present invention Figure 8 Schematic diagram of the local enlarged structure at point D in the middle.

[0032] Figure: 1, tower body; 2, dust suppression chamber; 3, treatment chamber; 4, variable frequency drive frame; 5, solenoid; 6, first torsion spring; 7, hollow shaft; 8, rotating shaft; 9, reciprocating seat; 10, driven swivel; 11, rotating seat; 12, active bevel gear ring; 13, fixed nozzle; 14, joint; 15, hinge shaft; 16, connecting arm; 17, rotary nozzle; 18, fixed nozzle; 19, rotary nozzle; 20, motor; 21, servo shaft; 22, variable Frequency axis; 23. Large arc gear; 24. Small arc gear; 25. Low-frequency gear; 26. High-frequency gear; 27. Ball screw; 28. Second torsion spring; 29. Follower sleeve; 30. Synchronous shaft; 31. Conical shaft; 32. Second belt shaft; 33. Induced air duct; 34. Corrugated duct; 35. Air uniformity chamber; 36. Exhaust gas inlet pipe; 37. Clean air exhaust pipe; 38. Turbulence enhancement disk; 39. Ultrasonic vibrator; 40. First belt shaft. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] like Figures 1 to 9 As shown, the present invention provides an exhaust gas separation and purification device for a shell baking and dewaxing device, comprising a tower body 1, wherein the interior of the tower body 1 is provided with a dust reduction chamber 2 and a processing chamber 3 which are isolated from each other from top to bottom;

[0035] The dust suppression chamber 2 is filled with a dust suppression liquid, which is an electrostatic adsorption liquid. The electrostatic adsorption liquid is a polyacrylamide solution. The dust suppression liquid is used for electrostatic adsorption of exhaust gas particles. The processing chamber 3 stores a sodium hydroxide solution. The processing chamber 3 is used to absorb sulfur dioxide and nitrogen oxides in the exhaust gas. The dust suppression chamber 2 and the processing chamber 3 are both connected to a sewage valve.

[0036] During the tail gas treatment process of the shell baking and dewaxing equipment, the tail gas first enters the dust reduction chamber 2. The electrostatic adsorption liquid filled in the dust reduction chamber 2 can use the principle of electrostatic adsorption to efficiently capture particulate matter in the tail gas, so that the tail gas is initially purified. Then the tail gas enters the treatment chamber 3. The sodium hydroxide solution in the treatment chamber 3 can chemically react with sulfur dioxide and nitrogen oxides in the tail gas, absorb these harmful gases, and further purify the tail gas. The drain valves provided on the dust reduction chamber 2 and the treatment chamber 3 facilitate the regular discharge of pollutants accumulated in the chamber, thereby ensuring the purification effect of the dust reduction liquid and the sodium hydroxide solution.

[0037] A frequency conversion transmission system is provided on the top of the processing chamber 3. A frequency conversion drive frame 4 and a rotatable solenoid 5 that can reciprocate along the axis of the tower body 1 are installed on the frequency conversion transmission system. The solenoid 5 is rotatably installed on the frequency conversion drive frame 4. A first torsion spring 6 is provided at the rotation connection between the solenoid 5 and the frequency conversion drive frame 4. A hollow shaft 7 is rotatably installed on the inner wall of the solenoid 5. A rotating shaft 8 is rotatably installed on the inner wall of the hollow shaft 7. The hollow shaft 7 and the rotating shaft 8 are both linked to the solenoid 5. A reciprocating seat 9 that can reciprocate up and down is installed on the solenoid 5. The reciprocating stroke and reciprocating frequency of the reciprocating seat 9 and the frequency conversion drive frame 4 change periodically.

[0038] During the tail gas separation and purification process of the shell baking and dewaxing equipment, the motor 20 is started, and the motor 20 drives the servo shaft 21 to rotate through the first transmission toothed belt, and the arc surface large gear 23 and the arc surface small gear 24 on the servo shaft 21 rotate accordingly. When the arc surface small gear 24 is engaged with the low-frequency gear 25 on the frequency conversion shaft 22, the frequency conversion shaft 22 is driven to rotate at a low speed. When the speed conversion shaft vibrates at a low frequency, the low-frequency vibration of the frequency conversion drive frame 4 and the reciprocating seat 9 is achieved. When the arc surface small gear 24 is engaged with the low-frequency gear 25 on the frequency conversion shaft 22, the number of rotations of the solenoid 5 and the ball screw 27 is small, thereby achieving low-stroke vibration of the frequency conversion drive frame 4 and the reciprocating seat 9.

[0039] When the arc surface large gear 23 is meshed with the high frequency gear 26, the frequency conversion shaft 22 rotates at high speed, the frequency conversion drive frame 4 moves up and down quickly, and the solenoid 5 rotates back and forth quickly, thereby forming a high stroke and high frequency vibration of the frequency conversion drive frame 4 and the reciprocating seat 9;

[0040] In the frequency conversion interruption zone, the transmission is temporarily interrupted to achieve periodic changes in stroke and frequency. This periodic change enables the reciprocating seat 9 mounted on the solenoid 5 and the purification system on the rotating seat 11 to move at different speeds and amplitudes.

[0041] When the variable frequency drive frame 4 and the reciprocating seat 9 vibrate at high frequency and large stroke, the rotating nozzle 19 is prompted to form a dense atomization area to enhance the gas-liquid contact area;

[0042] In low-frequency, small-stroke vibration mode, the uniformity of gas-liquid contact is improved by expanding the coverage of the purification liquid;

[0043] The frequency conversion transmission system includes a motor 20 mounted on the tower body 1, a servo shaft 21 and a frequency conversion shaft 22 rotatably connected to the tower body 1, the output shaft end of the motor 20 is connected to the servo shaft 21 through a first transmission toothed belt, and the servo shaft 21 is respectively mounted with a staggered cambered large gear 23 and a cambered small gear 24;

[0044] Two symmetrically arranged frequency conversion interruption zones are provided on the servo shaft 21 and correspond to the positions between the arc surface large gear 23 and the arc surface small gear 24;

[0045] The frequency conversion shaft 22 is respectively provided with a low-frequency gear 25 meshing with the arc surface small gear 24 and a high-frequency gear 26 meshing with the arc surface large gear 23;

[0046] The central angle of the arc-surface large gear 23 is 240°, the central angle of the arc-surface small gear 24 is 60°, and the central angles of the two frequency conversion interruption zones are both 30°. The radius of the arc-surface small gear 24 is 1.8 times the radius of the low-frequency gear 25, and the radius of the arc-surface large gear 23 is 10 times the radius of the high-frequency gear 26.

[0047] The central angle of the large arc gear 23 is 240°, the central angle of the small arc gear 24 is 60°, and the central angle of the frequency conversion interruption zone is 30°. Combined with the specific radius ratios of the small arc gear 24 and the low-frequency gear 25, and the large arc gear 23 and the high-frequency gear 26, the transmission ratio of the frequency conversion transmission system can be accurately controlled. When the large arc gear 23 is meshed with the high-frequency gear 26, high-speed transmission can be achieved. When the small arc gear 24 is meshed with the low-frequency gear 25, the purification system can cycle between high-speed transmission and low-speed transmission.

[0048] High-speed transmission drives the variable frequency drive frame 4 and the reciprocating seat 9 to vibrate at high frequency and large stroke, enhancing the atomization effect of the rotating nozzle 19, increasing the gas-liquid contact area and reaction rate, and is suitable for high-concentration exhaust gas purification. Low-frequency mode: low-speed transmission expands the coverage of the purification liquid, avoids local overload, improves adsorption uniformity, and adapts to conventional working conditions. Through the cyclic alternation of high-speed and low-speed transmission, it prevents nozzle clogging, reduces mechanical wear, optimizes energy consumption, and extends equipment life.

[0049] When the number of reciprocating rotations and the rotation speed of the solenoid 5 change, the rotation direction and the rotation speed of the rotating seat 11 change periodically;

[0050] The periodic change of the rotation direction of the rotating seat 11 drives the fixed nozzle 13 to swing at multiple angles, so that the fixed nozzle 18 and the rotating nozzle 19 form a multi-directional staggered purification liquid atomization layer, significantly expanding the coverage of the purification liquid and reducing the purification blind area;

[0051] The periodic change of the rotation speed drives the rotating nozzle 19 through the linkage module to dynamically adjust the atomized particles. In the high-speed stage, fine droplets are generated to increase the gas-liquid contact area and accelerate the chemical reaction efficiency of sulfur dioxide, nitrogen oxides and sodium hydroxide solution. In the low-speed stage, the residence time of the purified liquid is extended to enhance the adsorption effect.

[0052] At the same time, the periodic switching of the rotation direction and rotation speed, combined with the disturbance effect of the turbulence enhancement disk 38, breaks the stable attachment state of the liquid film, prevents the nozzle from particle deposition or scaling caused by the fixed spray pattern, and reduces maintenance frequency;

[0053] In addition, the high-speed rotation of the rotating seat 11 adapts to highly polluted exhaust gas to improve the purification intensity, and the low-speed rotation adapts to normal working conditions to save energy. Combined with the dynamic adjustment of the variable frequency drive system, the balance between purification efficiency and energy consumption is optimized;

[0054] The periodic rotation direction switching can also reduce the unidirectional stress concentration of the transmission components, avoid mechanical fatigue damage, and the rotation speed change reduces the continuous high-speed friction loss, thereby extending the service life of core components such as the solenoid 5 and the hollow shaft 7;

[0055] Two ball screws 27 are rotatably mounted on the tower body 1, and a second transmission toothed belt is installed on the frequency conversion shaft 22. The two ball screws 27 are both connected to the second transmission toothed belt. A second torsion spring 28 is provided at the rotation connection between the two ball screws 27 and the tower body 1. The two ball screws 27 are both connected to the frequency conversion drive frame 4.

[0056] The frequency conversion transmission system also includes a follower sleeve 29 rotatably connected to the frequency conversion drive frame 4. A sliding coupling groove with two open ends is fixedly provided inside the follower sleeve 29. A coupling groove section slidably connected to the sliding coupling groove is fixedly provided on the frequency conversion shaft 22. The cross-sections of the coupling groove section and the sliding coupling groove are both regular hexagonal. A third transmission toothed belt is connected between the follower sleeve 29 and the solenoid 5.

[0057] During the rotation of the frequency conversion shaft 22, its coupling groove section slides in the sliding coupling groove of the follower sleeve 29. Since the cross-sections of the two are regular hexagons, the follower sleeve 29 can be ensured to rotate synchronously with the frequency conversion shaft 22. The follower sleeve 29 drives the solenoid 5 to rotate through the third transmission toothed belt. At the same time, the rotation of the frequency conversion shaft 22 drives the frequency conversion drive frame 4 to move up and down through the ball screw 27. This structure makes the rotation of the solenoid 5 and the up and down movement of the frequency conversion drive frame 4 mutually correlated and stable, ensuring that the purification system can perform effective exhaust gas purification work at different positions. Compared with the existing technology, this structure enhances the stability and coordination of the transmission, avoids the incoordination of the movement between components, improves the overall reliability of the device, and solves the problems of jamming and asynchronism that are prone to occur in traditional transmission structures;

[0058] It also includes a synchronization shaft 30 rotatably connected to the frequency conversion drive frame 4, a first bevel gear is installed on the synchronization shaft 30, a second bevel gear is installed on the solenoid 5 and the hollow shaft 7, the two second bevel gears are both connected to the first bevel gear, the two second bevel gears are symmetrically arranged with the horizontal plane where the axis of the synchronization shaft 30 is located as the axis, and a third bevel gear is installed on the synchronization shaft 30 and the rotating shaft 8, and the two third bevel gears are orthogonally meshed;

[0059] When the synchronous shaft 30 on the frequency conversion drive frame 4 rotates, the first bevel gear installed on the synchronous shaft 30 drives the second bevel gear on the solenoid 5 and the hollow shaft 7 to rotate, so that the solenoid 5 and the hollow shaft 7 rotate synchronously. At the same time, the synchronous shaft 30 and the third bevel gear on the rotating shaft 8 are orthogonally meshed, transmitting the rotation of the synchronous shaft 30 to the rotating shaft 8, so that the movement of the rotating shaft 8, the solenoid 5, and the hollow shaft 7 are coordinated. This ensures the consistency of the movement of each component in the purification system, so that the purification system on the rotating seat 11 can operate stably.

[0060] A driven swivel ring 10 is rotatably sleeved on the reciprocating seat 9, a swivel seat 11 is mounted on the bottom end of the rotating shaft 8, a purification system is mounted on the swivel seat 11, and an active bevel gear ring 12 is mounted on the bottom of the hollow shaft 7;

[0061] The purification system includes a fixed nozzle 13 and a joint 14 hinged to the swivel seat 11. Two hinge shafts 15 are installed on the joint 14. Both hinge shafts 15 are hinged to the swivel seat 11. A connecting arm 16 is hinged between the fixed nozzle 13 and the driven swivel 10. A rotary nozzle 17 is rotatably connected to the joint 14. The rotary nozzle 17 is rotatably connected to the fixed nozzle 13 through a bearing. The rotary nozzle 17 is transmission-connected to the active bevel gear ring 12 through a linkage module. A group of fixed nozzles 18 are installed at the end of the fixed nozzle 13, and a rotary nozzle 19 is installed at the end of the rotary nozzle 17.

[0062] The linkage module includes two hinge shafts 15 installed on the joint 14, a conical shaft 31 rotatably connected to the swivel seat 11, and a first belt shaft 40. The two hinge shafts 15 are hinged to the swivel seat 11. The conical shaft 31 is respectively provided with a first conical tooth surface and a second conical tooth surface. The first conical tooth surface is meshed with the active bevel gear ring 12. The first belt shaft 40 is provided with a fourth bevel gear connected to the second bevel tooth surface. The first belt shaft 40 is connected to the second belt shaft 32 through a fifth synchronous toothed belt. The second belt shaft 32 and the rotary spray pipe 17 are both provided with a fifth bevel gear, and the two fifth bevel gears are meshed with each other.

[0063] The driving bevel gear ring 12 is meshed with the first bevel tooth surface of the bevel shaft 31, driving the bevel shaft 31 to rotate. The second bevel tooth surface on the bevel shaft 31 drives the first belt shaft 40 to rotate through the fourth bevel gear. The first belt shaft 40 causes the second belt shaft 32 to rotate through the fifth synchronous toothed belt. The fifth bevel gear on the second belt shaft 32 is meshed with the fifth bevel gear on the rotary spray pipe 17 to realize the rotation of the rotary spray pipe 17. At the same time, the screw tube 5 drives the reciprocating seat 9 to move up and down, and the fixed spray pipe 13 is swung through the connecting arm 16. The fixed nozzle 18 and the rotating nozzle 19 respectively spray the purification liquid in different directions. The purification liquid sprayed by the fixed nozzle 18 can perform preliminary directional spray purification on the exhaust gas. The rotating nozzle 19 rotates with the rotary spray pipe 17, and the exhaust gas sprayed therefrom forms a rotating gas distribution area, further expanding the contact range and renewal contact rate of the exhaust gas and the sodium hydroxide solution. Compared with the prior art, the purification system and the linkage module design diversify the basic ways of obtaining the exhaust gas and the sodium hydroxide solution, increase the contact area between the exhaust gas and the sodium hydroxide solution, and improve the purification efficiency and purification effect of the exhaust gas.

[0064] A flow guide assembly is provided in the tower body 1 to drive the exhaust gas to flow out through the dust reduction chamber 2, the fixed nozzle 18, the rotating nozzle 19, and the processing chamber 3 in sequence.

[0065] The guide assembly includes an air duct 33 installed in the tower body 1, the bottom end of the air duct 33 is connected to the dust reduction chamber 2, an axial flow fan is installed in the air duct 33, a uniform air chamber 35 is provided in the rotating seat 11, the air outlet end of the air duct 33 is connected to a corrugated duct 34, the other end of the corrugated duct 34 is connected to the uniform air chamber 35, the interior of the rotary nozzle 17 is provided with an inner flow channel connected to the inner cavity of the joint 14, and a corrugated duct is connected between the inner cavity of the joint 14 and the uniform air chamber 35. A flexible joint, a rotating nozzle 19 is connected to the inner flow channel, an outer flow channel connected to the inner flow channel is provided between the fixed nozzle 13 and the rotary spray pipe 17, the fixed nozzle 18 is connected to the outer flow channel, the angle between the outlet direction of the rotating nozzle 19 and the rotary spray pipe 17 is 45°, the outlet direction of the fixed nozzle 18 is parallel to the axis of the rotary spray pipe 17, an exhaust gas inlet pipe 36 connected to the dust reduction chamber 2 is installed at the bottom of the tower body 1, and a clean air exhaust pipe 37 connected to the processing chamber 3 is installed at the top of the tower body 1.

[0066] When the exhaust gas is treated, the axial flow fan is started, and the suction force generated by the fan causes the exhaust gas to enter the dust reduction chamber 2 from the exhaust gas inlet pipe 36 at the bottom of the tower body 1. After preliminary purification in the dust reduction chamber 2, the exhaust gas enters the corrugated duct 34 through the induced draft tube 33, and then enters the uniform air chamber 35 in the rotating seat 11. The uniform air chamber 35 evenly distributes the exhaust gas, and then enters the inner flow channel of the rotary spray pipe 17 through the corrugated flexible joint. Part of the exhaust gas is ejected from the rotating nozzle 19, and the other part is ejected from the fixed nozzle 18 through the outer flow channel, and finally enters the treatment chamber 3 for further purification and is discharged from the clean air exhaust pipe 37. This flow guide component ensures that the exhaust gas can pass through each purification link in sequence according to a specific path, so that the purification process is carried out in an orderly manner, and the purification efficiency is improved. Compared with the existing technology, it optimizes the flow path of the exhaust gas, avoids the situation of insufficient exhaust gas purification or the occurrence of purification dead corners, and effectively solves the problems of chaotic exhaust gas flow and unsatisfactory purification effect in traditional exhaust gas purification devices;

[0067] It also includes a group of turbulence enhancement disks 38 installed on the fixed nozzle 13, each turbulence enhancement disk 38 is provided with a group of turbulence holes, and a group of ultrasonic vibrators 39 distributed in a circular array are installed inside the dust reduction chamber 2.

[0068] During the swinging process of the fixed nozzle 13, the turbulence enhancement disk 38 installed on the fixed nozzle 13 moves accordingly. The turbulent holes on the turbulence enhancement disk 38 can cause the ejected purification liquid to fluctuate, increasing the contact opportunity between the purification liquid and the exhaust gas. At the same time, the ultrasonic vibrator 39 in the dust reduction chamber 2 emits ultrasonic waves, which act on the dust reduction liquid and the exhaust gas, making the particulate matter in the exhaust gas more easily adsorbed by the dust reduction liquid, thereby enhancing the dust reduction effect. Compared with the existing technology, the arrangement of the turbulence enhancement disk 38 and the ultrasonic vibrator 39 further improves the purification effect, enhances the effect of the purification process in many aspects, and solves the problem of the traditional purification method with a single purification means and difficulty in improving the purification effect.

[0069] The working principle and use process of the present invention:

[0070] The tail gas first enters the dust reduction chamber 2 through the exhaust gas inlet pipe 36 at the bottom of the tower body 1. The electrostatic adsorption liquid filled in the dust reduction chamber 2 is enhanced in liquid surface activity by high-frequency ultrasonic disturbance with the assistance of the ultrasonic vibrator 39, so that the particulate matter in the tail gas is quickly captured and settled due to the electrostatic adsorption effect. The tail gas after preliminary purification is driven by the axial flow fan and enters the uniform air chamber 35 in the rotating seat 11 through the induced draft tube 33 and the corrugated duct 34. After the uniform flow effect of the uniform air chamber 35, it is divided into two paths: one path enters the fixed nozzle 13 through the outer flow channel, and is sprayed with sodium hydroxide solution in a direction parallel to the axis of the rotary nozzle 17 through the fixed nozzle 18; the other path enters the rotary nozzle 17 through the inner flow channel, and is rotated and sprayed at a 45° angle by the rotating nozzle 19 to form a spiral atomization area, thereby expanding the gas-liquid contact area;

[0071] At the same time, the frequency conversion transmission system drives the cambered large gear 23 and cambered small gear 24 on the servo shaft 21 through the motor 20 to alternately mesh the high-frequency gear 26 and the low-frequency gear 25, driving the frequency conversion shaft 22 to periodically switch between high-speed and low-speed rotation modes. In the high-speed mode, the frequency conversion shaft 22 drives the frequency conversion drive frame 4 to reciprocate at high frequency through the ball screw 27, and the synchronous shaft 30 links the solenoid 5 and the hollow shaft 7 to rotate rapidly, so that the rotating seat 11 drives the fixed nozzle 13 and the rotary nozzle 17 to swing with a large stroke, and the rotating nozzle 19 generates fine droplets to enhance the reaction efficiency. In the low-speed mode, the reciprocating seat 9 vibrates slightly, and the fixed nozzle 18 expands the coverage area, prolongs the residence time of the purification liquid to improve the adsorption uniformity.

[0072] The purified liquid is sprayed in multiple directions through the fixed nozzles 18 and rotating nozzles 19, and is fully mixed with the exhaust gas in the treatment chamber 3. The sodium hydroxide solution reacts with the sulfur dioxide and nitrogen oxides to neutralize them, producing harmless salts. The purified gas is discharged through the clean gas exhaust pipe 37, and the sediment is regularly cleaned through the sewage valve. In addition, the turbulence enhancement disk 38 installed on the fixed nozzle 13 disturbs the liquid flow through the turbulent holes. Combined with the periodic movement of the variable frequency drive system, it breaks up the liquid film and prevents nozzle clogging.

[0073] The entire process achieves a balance between purification intensity and energy consumption by dynamically adjusting the frequency and stroke of the variable frequency drive system. At the same time, the synergistic effect of the ultrasonic vibrator 39 and the turbulence enhancement disk 38 is utilized to significantly improve the particle adsorption efficiency and harmful gas conversion rate, ultimately achieving a highly efficient and energy-saving exhaust purification effect.

[0074] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0075] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tail gas separation and purification device for a shell roasting and dewaxing device, comprising a tower body (1), characterized in that: The interior of the tower body (1) is provided with a dust removal chamber (2) and a processing chamber (3) which are isolated from each other from top to bottom. A variable frequency transmission system is provided on the top of the processing chamber (3). A variable frequency drive frame (4) which can reciprocate along the axis of the tower body (1) and a rotatable screw tube (5) are installed on the variable frequency transmission system. The screw tube (5) is rotatably installed on the variable frequency drive frame (4). A first torsion spring (6) is provided at the rotation connection between the screw tube (5) and the variable frequency drive frame (4). A hollow shaft (7) is rotatably installed on the inner wall of the screw tube (5). The hollow shaft The inner wall of (7) is rotatably mounted with a rotating shaft (8), the hollow shaft (7) and the rotating shaft (8) are linked with the screw tube (5), a reciprocating seat (9) capable of reciprocating up and down is installed on the screw tube (5), the reciprocating stroke and reciprocating frequency of the reciprocating seat (9) and the variable frequency drive frame (4) change periodically, a driven rotating ring (10) is rotatably sleeved on the reciprocating seat (9), a rotating seat (11) is mounted on the bottom end of the rotating shaft (8), a group of purification systems is mounted on the rotating seat (11), and an active bevel gear ring (12) is mounted on the bottom of the hollow shaft (7); The purification system includes a fixed nozzle (13) and a joint (14) hinged to a rotating seat (11), a connecting arm (16) is hinged between the fixed nozzle (13) and the driven rotating ring (10), a rotary nozzle (17) is rotatably connected to the joint (14), the rotary nozzle (17) is rotatably connected to the fixed nozzle (13) through a bearing, the rotary nozzle (17) is transmission-connected to the active bevel gear ring (12) through a linkage module, a group of fixed nozzles (18) are installed at the end of the fixed nozzle (13), and a rotary nozzle (19) is installed at the end of the rotary nozzle (17); A flow guide component is provided in the tower body (1) for driving the tail gas to flow out through the dust reduction chamber (2), the fixed nozzle (18), the rotating nozzle (19), and the processing chamber (3) in sequence.

2. The tail gas separation and purification device for the shell roasting and dewaxing equipment according to claim 1, characterized in that: The dust reduction chamber (2) is filled with dust reduction liquid, which is an electrostatic adsorption liquid and is used for electrostatic adsorption of exhaust gas particles. The processing chamber (3) stores sodium hydroxide solution, which is used for absorbing sulfur dioxide and nitrogen oxides in the exhaust gas. The dust reduction chamber (2) and the processing chamber (3) are both connected to a sewage valve.

3. The tail gas separation and purification device for the shell roasting and dewaxing equipment according to claim 1, characterized in that: The variable frequency transmission system comprises a motor (20) mounted on the tower body (1) and a servo shaft (21) and a variable frequency shaft (22) rotatably connected to the tower body (1); the output shaft end of the motor (20) is connected to the servo shaft (21) through a first transmission toothed belt; the servo shaft (21) is respectively mounted with a staggered cambered gear (23) and a cambered small gear (24); two symmetrically arranged variable frequency interruption zones are provided on the servo shaft (21) and at positions corresponding to the positions between the cambered gear (23) and the cambered small gear (24); the variable frequency shaft (22) is connected to the servo shaft (21) through a first transmission toothed belt; 2) are respectively provided with a low-frequency gear (25) meshing with the arc surface small gear (24) and a high-frequency gear (26) meshing with the arc surface large gear (23); two ball screws (27) are rotatably installed on the tower body (1); a second transmission toothed belt is installed on the frequency conversion shaft (22); the two ball screws (27) are both connected to the second transmission toothed belt; a second torsion spring (28) is provided at the rotation connection between the two ball screws (27) and the tower body (1); and the two ball screws (27) are both connected to the frequency conversion drive frame (4).

4. The tail gas separation and purification device for the shell roasting and dewaxing equipment according to claim 3, characterized in that: The central angle of the arc surface large gear (23) is 240 degrees, the central angle of the arc surface small gear (24) is 60 degrees, the central angles of the two frequency conversion interruption zones are both 30 degrees, the radius of the arc surface small gear (24) is 1.5 to 2.5 times the radius of the low frequency gear (25), and the radius of the arc surface large gear (23) is 9 to 12 times the radius of the high frequency gear (26).

5. The tail gas separation and purification device for the shell roasting and dewaxing equipment according to claim 3, characterized in that: The variable frequency transmission system further comprises a follower sleeve (29) rotatably connected to the variable frequency drive frame (4), a sliding coupling groove with two ends open is fixedly provided inside the follower sleeve (29), a coupling groove section slidably connected to the sliding coupling groove is fixedly provided on the variable frequency shaft (22), and the cross sections of the coupling groove section and the sliding coupling groove are both regular hexagonal, and a third transmission toothed belt is transmission-connected between the follower sleeve (29) and the solenoid (5).

6. The tail gas separation and purification device for the shell roasting and dewaxing equipment according to claim 5, characterized in that: The invention also includes a synchronous shaft (30) rotatably connected to the variable frequency drive frame (4), wherein a first bevel gear is mounted on the synchronous shaft (30), a second bevel gear is mounted on each of the solenoid (5) and the hollow shaft (7), and the two second bevel gears are both transmission-connected to the first bevel gear, and the two second bevel gears are symmetrically arranged with the horizontal plane where the axis of the synchronous shaft (30) is located as the axis, and a third bevel gear is mounted on each of the synchronous shaft (30) and the rotating shaft (8), and the two third bevel gears are orthogonally meshed.

7. The tail gas separation and purification device for the shell roasting and dewaxing equipment according to claim 5, characterized in that: The linkage module comprises two hinge shafts (15) mounted on a joint (14), a conical shaft (31) rotatably connected to a swivel seat (11), and a first belt shaft (40). The two hinge shafts (15) are both hinged to the swivel seat (11). The conical shaft (31) is provided with a first conical tooth surface and a second conical tooth surface, respectively. The first conical tooth surface is meshed with an active conical gear ring (12). A fourth bevel gear connected to the second bevel tooth surface is mounted on the first belt shaft (40). The first belt shaft (40) is connected to the second belt shaft (32) through a fifth synchronous toothed belt. A fifth bevel gear is mounted on the second belt shaft (32) and the rotary spray pipe (17), and the two fifth bevel gears are meshed with each other.

8. The tail gas separation and purification device for shell roasting and dewaxing equipment according to claim 1, characterized in that: The flow guide assembly includes an air duct (33) installed in the tower body (1), the bottom end of the air duct (33) is connected to the dust reduction chamber (2), an axial flow fan is installed in the air duct (33), a uniform air chamber (35) is provided in the rotating seat (11), the air outlet end of the air duct (33) is connected to a corrugated duct (34) by rotation, the other end of the corrugated duct (34) is connected to the uniform air chamber (35), the interior of the rotary spray pipe (17) is provided with an inner flow channel connected to the inner cavity of the joint (14), and the inner cavity of the joint (14) and the uniform air chamber (35) are connected by a The invention relates to a corrugated flexible joint, wherein the rotating nozzle (19) is connected to the inner flow channel, an outer flow channel connected to the inner flow channel is provided between the fixed nozzle (13) and the rotary spray pipe (17), and the fixed nozzle (18) is connected to the outer flow channel. The angle between the air outlet direction of the rotating nozzle (19) and the rotary spray pipe (17) is 45°, and the air outlet direction of the fixed nozzle (18) is parallel to the axis of the rotary spray pipe (17). The bottom of the tower body (1) is provided with an exhaust gas inlet pipe (36) connected to the dust suppression chamber (2), and the top of the tower body (1) is provided with a clean air exhaust pipe (37) connected to the processing chamber (3).

9. The tail gas separation and purification device for shell roasting and dewaxing equipment according to claim 1, characterized in that: It also includes a group of turbulence enhancement disks (38) installed on the fixed nozzle (13), each of the turbulence enhancement disks (38) is provided with a group of turbulence holes, and a group of ultrasonic vibrators (39) distributed in a circular array are installed inside the dust reduction chamber (2).

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