Waste gas purification device for metal heat treatment

Abstract

The invention discloses a waste gas purification device for metal heat treatment, and relates to the field of waste gas purification, the waste gas purification device comprises a pre-purification cylinder, an outer shaft is fixedly arranged in the pre-purification cylinder, a centrifugal shaft is fixedly inserted in the outer shaft, an eccentric hammer is fixedly arranged on the circumferential outer wall of the centrifugal shaft, and main shafts are fixedly arranged at the two ends of the centrifugal shaft; an elastic frame A and an elastic frame B are installed at the ends of the two main shafts correspondingly, and an electrostatic dust collection net cylinder is fixedly arranged on the outer side of the pre-purification cylinder. According to the waste gas purification device for metal heat treatment, metal heat treatment waste gas enters the gas inlet pipeline and uniformly enters the pre-purification barrel from the gas inlet barrel and the coil pipe, large-particle impurities in the waste gas are pretreated, and in the subsequent waste gas treatment work, the large-particle impurities in the waste gas can be effectively purified. After large-particle impurities in the waste gas are pretreated through the pre-purification cylinder, the subsequent waste gas treatment work can obtain remarkable advantages in multiple aspects.

Description

Technical Field

[0001] The present invention relates to the field of waste gas purification, in particular to a waste gas purification device for metal heat treatment. Background Art

[0002] With the rapid development of industry, both in the West and in my country, special processing of metals is an indispensable metal processing process, namely quenching heat treatment. Therefore, the pollution of quenching heat treatment waste gas to the environment has become increasingly prominent, not only causing huge pollution to the air environment, but also the nitrogen monoxide, nitrogen dioxide, sulfur dioxide, water, and a small amount of carbon particles in the waste gas are endangering human health, so waste gas treatment is needed;

[0003] Regarding the device for treating waste gas generated by metal heat treatment, after searching, the Chinese patent with announcement number CN222056866U discloses a metal heat treatment waste gas purification device, the article proposes: the first processing structure is arranged in two groups and is respectively located on both sides of the filter screen, the first processing structure includes a fixed plate, a cam, a connecting protrusion, a return spring, a connecting seat, a clamping block and a clamping slot, the fixing plate is fixedly installed on the filter device, the front side of the fixing plate is rotatably installed with a cam, a connecting seat is provided on the filter device, two groups of return springs are fixedly installed on the outer wall of one side of the connecting seat, the free end of the return spring is fixedly connected to the fixed plate, a clamping slot is provided on the filter screen, a clamping block is fixedly installed on the outer wall of one side of the connecting seat, the clamping block and the clamping slot are matched with the clamping connection, the cam is rotated by the connecting protrusion, the position of the cam is changed, and the use of the return spring pulls the fixing seat, so that the clamping block and the clamping slot are canceled, and the filter screen can be disassembled, which is convenient for cleaning or replacement, thereby ensuring the effect of filtering waste gas, simple and convenient operation, and easy to promote and use;

[0004] Although the above-mentioned device can realize the disassembly of the filter screen for convenient cleaning or replacement, thus ensuring the effect of filtering the exhaust gas and being simple and convenient to operate, in actual use, no large particle interception mechanism is provided at the air inlet end of the metal heat treatment, and large particle impurities accumulate in the filter screen on the filter device, which can easily cause blockage and make it impossible for subsequent processing steps to proceed normally. Summary of the Invention

[0005] The object of the present invention is to provide a device for purifying waste gas used for metal heat treatment to solve the problems mentioned in the above background technology.

[0006] In order to achieve the above-mentioned purpose, a purification device for waste gas used for metal heat treatment is provided, including a pre-purification cylinder, an outer shaft is fixedly arranged inside the pre-purification cylinder, a centrifugal shaft is fixedly inserted inside the outer shaft, an eccentric hammer is fixedly arranged on the circumferential outer wall of the centrifugal shaft, main shafts are fixedly arranged at both ends of the centrifugal shaft, and elastic frames A and elastic frames B are respectively installed on the ends of the two groups of main shafts, an electrostatic dust removal net cylinder is fixedly arranged on the outside of the pre-purification cylinder, a collecting cylinder is fixedly arranged on the outside of the electrostatic dust removal net cylinder, and an exhaust pipe is fixedly installed on the side wall of the collecting cylinder.

[0007] Furthermore, the axial cross-sections of the pre-purification cylinder, the collecting cylinder and the electrostatic dust removal net cylinder are concentric circle structures. The pre-purification cylinder, the collecting cylinder and the electrostatic dust removal net cylinder are all truncated cone-shaped. Multiple groups of mesh holes are evenly arranged on the electrostatic dust removal net cylinder. The electrostatic dust removal net cylinder is powered by a DC power supply installed on the outside of the equipment.

[0008] Furthermore, a rear docking seat is fixedly provided at one end of the pre-purification cylinder, and a front docking seat is fixedly provided at the other end of the pre-purification cylinder. Both the front docking seat and the rear docking seat are circular, and the two sides of the bottom of the collection cylinder are fixedly connected to the pre-purification cylinder through the front docking seat and the rear docking seat respectively.

[0009] Furthermore, the cross-section of the eccentric hammer is fan-shaped, the end of the centrifugal shaft is fixedly connected to a docking shaft, the eccentric hammer is fixedly connected through the centrifugal shaft and the docking shaft, the docking shaft is fixedly connected to the output shaft of the drive motor through a transmission soft shaft, and the drive motor drives the pre-purification cylinder to perform polarization rotation through the docking shaft, centrifugal shaft, eccentric hammer, and outer shaft.

[0010] Furthermore, the main shafts at both ends of the pre-purification cylinder are limitedly supported by elastic frames B and A. The structures of elastic frames B and A are consistent. Elastic frame A includes a bearing seat, a fixed plate, a buffer spring A, a buffer spring B and an outer frame. The main shaft is interspersed inside the bearing seat.

[0011] Furthermore, the upper and lower ends of the bearing seat are fixed with fixed plates, the bearing seat and the two sets of fixed plates are "U" shaped, and the two sets of fixed plates are respectively fixed with buffer springs A and buffer springs B, and an outer frame is installed on the outer side of the bearing seat.

[0012] Furthermore, the outer frame is rectangular, a buffer spring A is fixedly provided on the inner upper side of the outer frame, a buffer spring B is fixedly provided on the inner lower side of the outer frame, and support frames are fixedly provided at the bottoms of the elastic frame B and the elastic frame A.

[0013] Furthermore, six groups of air intake cylinders are equidistantly arranged on the surface of the front docking seat, and two adjacent groups of air intake cylinders are connected by coils, which are "C" shaped, and air intake pipes are fixedly arranged on the surface of the air intake cylinders.

[0014] Furthermore, the front docking seat, air intake cylinder, air intake pipe and coil are combined to form a uniform air distribution mechanism, and the air intake pipe is connected to the metal heat treatment exhaust pipe through a flange.

[0015] Furthermore, multiple groups of through holes are evenly provided on both end faces of the collecting cylinder, and multiple groups of screw holes are evenly provided on the front docking seat and the rear docking seat. The through holes and the screw holes are connected, and the fixing bolts pass through the through holes provided on the collecting cylinder and are screwed into the screw holes provided on the docking seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This solution allows the metal heat treatment waste gas to enter the interior of the air intake pipe, and then evenly enter the interior of the pre-purification cylinder from the air intake cylinder and coil, thereby pre-treating large particle impurities in the waste gas. After the pre-treated waste gas is pre-treated by the pre-purification cylinder during subsequent waste gas treatment, the subsequent waste gas treatment work can obtain multiple significant advantages: First, large particle impurities are intercepted in advance, which can prevent them from entering subsequent treatment equipment, greatly extending their service life, and reducing replacement frequency and maintenance costs;

[0018] 2. This solution utilizes a truncated cone-shaped pre-purifier in a metal heat treatment waste gas treatment system, coupled with polarized rotation. Metal heat treatment waste gas often contains sticky oil smoke. The centrifugal force of the eccentric hammer causes the pre-purifier to produce a composite motion of non-uniform rotation and high-frequency micro-vibration. This creates periodic mechanical impacts on the filter pore surface: sticky oil smoke has difficulty adhering stably under vibration and is easily shaken off to the bottom of the pre-purifier. High-temperature solidified metal particles are detached from the filter pore edges due to vibration, preventing them from sintering within the pores. The truncated cone structure also provides an auxiliary function: the truncated cone side surfaces are inclined, wider at the top and narrower at the bottom. During polarized rotation, impurities on the cylinder wall slide down the inclined surface due to the combined force of gravity and centrifugal force, further reducing impurity accumulation near the filter pores. This reduces the filter pore blockage rate and extends the maintenance cycle.

[0019] 3. This solution uses the pre-purifier to continuously change its contact position with the high-temperature exhaust gas during rotation, ensuring more uniform heating across the cylinder wall and preventing localized overheating. Furthermore, the inclined sides of the frustum-shaped structure guide the high-temperature airflow to spiral upward along the cylinder wall, reducing direct impact of the airflow on the cylinder wall and lowering the risk of thermal fatigue damage. Compared to a cylindrical shape, the frustum-shaped pre-purifier, with its wide top and narrow bottom, better aligns with the diffusion characteristics of high-temperature airflow, reducing turbulent impact within the cylinder and further minimizing the probability of localized high-temperature concentration. The frustum-shaped pre-purifier structure, combined with rotation, ensures a more uniform flow path for the exhaust gas within the cylinder. Large impurities can be quickly separated from the airflow through centrifugal force and gravity, reducing the total amount of impurities entering subsequent pipelines and lowering the filtration pressure of subsequent equipment.

[0020] 4. In this solution, the exhaust gas can enter the interior of the pre-purification tube evenly through six groups of air inlet tubes. The exhaust gas enters the interior of the pre-purification tube evenly through six groups of air inlet tubes, which can form a more stable and uniform airflow distribution in the pre-purification tube, avoid uneven separation of large particles of impurities caused by local airflow speed being too high or too low, ensure that the interception efficiency of the pre-purification tube for large particles of impurities is more stable, and reduce the escape of impurities caused by airflow turbulence; at the same time, uniform air intake can reduce the airflow resistance inside the pre-purification tube, avoid the additional load on the equipment caused by excessive local pressure, reduce energy consumption, and allow the exhaust gas to fully contact the filtering or separation structure inside the pre-purification tube, thereby improving the capture effect of large particles of impurities, providing more stable exhaust gas conditions for subsequent electrostatic dust removal and other treatment links, and ensuring the efficient operation of the overall purification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view schematic diagram of the structure of the present invention;

[0022] Figure 2 is a cross-sectional view of the structure of the present invention;

[0023] Figure 3 A bottom view of the structure of the present invention;

[0024] Figure 4 A top view of the structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the bottom structure of the structure of the present invention;

[0026] Figure 6 The structure of the present invention Figure 1 Side view of

[0027] Figure 7 The structure of the present invention Figure 2 rear view.

[0028] Reference numerals

[0029] 1. Support frame; 2. Elastic frame A; 21. Elastic frame B; 22. Bearing seat; 23. Fixed plate; 24. Buffer spring A; 25. Buffer spring B; 26. Outer frame; 3. Main shaft; 4. Docking shaft; 41. Centrifugal shaft; 42. Eccentric hammer; 43. Outer shaft; 5. Pre-purification cylinder; 51. Front docking seat; 52. Air intake cylinder; 53. Air intake duct; 54. Coil; 6. Rear docking seat; 7. Collection cylinder; 8. Electrostatic dust removal net cylinder; 9. Exhaust pipe. DETAILED DESCRIPTION

[0030] Specific implementation method 1: Please refer to Figure 1-Figure 7The present invention provides a technical solution: a purification device for waste gas used for metal heat treatment, comprising a pre-purification cylinder 5, an outer shaft 43 is fixedly arranged inside the pre-purification cylinder 5, a centrifugal shaft 41 is fixedly inserted inside the outer shaft 43, an eccentric hammer 42 is fixedly arranged on the circumferential outer wall of the centrifugal shaft 41, main shafts 3 are fixedly arranged at both ends of the centrifugal shaft 41, and elastic frames A2 and elastic frames B21 are respectively installed on the ends of the two groups of main shafts 3, an electrostatic dust removal net cylinder 8 is fixedly arranged on the outside of the pre-purification cylinder 5, a collecting cylinder 7 is fixedly arranged on the outside of the electrostatic dust removal net cylinder 8, and an exhaust pipe 9 is fixedly installed on the side wall of the collecting cylinder 7.

[0031] Working principle: During actual use, the metal heat treatment waste gas enters the interior of the air intake pipe 53, and evenly enters the interior of the pre-purification cylinder 5 from the air intake cylinder 52 and the coil 54. The pre-purification cylinder 5 is arranged in a truncated cone shape and performs filtering through the filter holes on the pre-purification cylinder 5. At the same time, while the pre-purification cylinder 5 is filtering the waste gas, the driving motor drives the docking shaft 4 to rotate through the soft shaft. The docking shaft 4 drives the pre-purification cylinder 5 to perform polarization rotation through the docking shaft 4, the centrifugal shaft 41, the eccentric hammer 42, and the outer shaft 43, so as to realize the pretreatment of large particle impurities in the waste gas. After the pretreated waste gas, in the subsequent waste gas treatment work, after the large particle impurities in the waste gas are pretreated by the pre-purification cylinder 5, the subsequent waste gas treatment work can obtain many significant advantages: First, large particle impurities are intercepted in advance to prevent them from entering subsequent treatment equipment, such as fine filters, It can eliminate blockages in catalytic combustion devices, spray towers, etc., reduce the wear and loss of core components such as filter materials, nozzles, and catalysts, greatly extend their service life, and reduce replacement frequency and maintenance costs. Secondly, the dust content of the exhaust gas after pretreatment is significantly reduced, so that subsequent treatment equipment can focus more on removing gaseous pollutants, reduce the interference of large particles on mass transfer and reaction processes, improve purification efficiency, and ensure that exhaust emissions meet standards. At the same time, the removal of large particles reduces the flow resistance of exhaust gas in pipes and equipment, reduces the energy consumption of power equipment such as induced draft fans, and avoids unstable system operation caused by abnormal pressure fluctuations. In addition, subsequent equipment does not need to adopt complex anti-blocking and wear-resistant designs to deal with large particle impurities, which simplifies the equipment structure, reduces the initial investment cost, and makes daily maintenance more convenient, reduces downtime for cleaning, and ensures continuous and stable operation of the treatment system. It is especially suitable for waste gas treatment scenarios with high dust and many impurities in metal heat treatment.

[0032] Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1. The axial cross-section of the pre-purification cylinder 5, the collecting cylinder 7 and the electrostatic dust removal net cylinder 8 is a concentric circle structure. The pre-purification cylinder 5, the collecting cylinder 7 and the electrostatic dust removal net cylinder 8 are all truncated cone-shaped. Multiple groups of mesh holes are evenly arranged on the electrostatic dust removal net cylinder 8. The electrostatic dust removal net cylinder 8 is powered by a DC power supply installed on the outside of the equipment.

[0033] A rear docking seat 6 is fixedly provided at one end of the pre-purification cylinder 5, and a front docking seat 51 is fixedly provided at the other end of the pre-purification cylinder 5. The front docking seat 51 and the rear docking seat 6 are both circular, and the two sides of the bottom of the collecting cylinder 7 are fixedly connected to the pre-purification cylinder 5 through the front docking seat 51 and the rear docking seat 6 respectively.

[0034] The cross-section of the eccentric hammer 42 is fan-shaped, and the end of the centrifugal shaft 41 is fixedly connected to the docking shaft 4. The eccentric hammer 42 is fixedly connected through the centrifugal shaft 41 and the docking shaft 4. The docking shaft 4 is fixedly connected to the output shaft of the drive motor through a transmission soft shaft. The drive motor drives the pre-purification cylinder 5 to perform polarization rotation through the docking shaft 4, the centrifugal shaft 41, the eccentric hammer 42, and the outer shaft 43.

[0035] The main shafts 3 at both ends of the pre-purification cylinder 5 are limited and supported by elastic frames B21 and A2. The structures of the elastic frames B21 and A2 are consistent. The elastic frame A2 includes a bearing seat 22, a fixing plate 23, a buffer spring A24, a buffer spring B25 and an outer frame 26. The main shaft 3 is inserted into the interior of the bearing seat 22.

[0036] The upper and lower ends of the bearing seat 22 are fixed with fixed plates 23. The bearing seat 22 and the two sets of fixed plates 23 are "U"-shaped. Buffer springs A24 and buffer springs B25 are fixed on the two sets of fixed plates 23 respectively. An outer frame 26 is installed on the outer side of the bearing seat 22.

[0037] The outer frame 26 is rectangular in shape. A buffer spring A24 is fixedly installed on the upper side of the inner portion of the outer frame 26 . A buffer spring B25 is fixedly installed on the lower side of the inner portion of the outer frame 26 . The support frame 1 is fixedly installed on the bottom of the elastic frame B21 and the elastic frame A2 .

[0038] Six groups of air intake cylinders 52 are equidistantly arranged on the surface of the front docking seat 51 . Two adjacent groups of air intake cylinders 52 are connected by a coil 54 . The coil 54 is “C” shaped. An air intake pipe 53 is fixedly provided on the surface of the air intake cylinder 52 .

[0039] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown in the figure: In the metal heat treatment waste gas treatment system, the pre-cleaner 5 adopts a truncated cone design and cooperates with polarization rotation. The metal heat treatment waste gas often contains sticky oil smoke, such as quenching oil volatiles and high-temperature molten metal particles. Such impurities are easy to adhere to the surface of the filter holes. If the pre-cleaner 5 is stationary, the filter holes may be blocked in a short time, especially the small filter holes, requiring frequent shutdown for cleaning;

[0040] The core function of polarization rotation: through the centrifugal force of the eccentric hammer 42, the pre-purification cylinder 5 produces a composite motion of non-uniform rotation and high-frequency micro-vibration; it can form periodic mechanical impact on the surface of the filter hole: sticky oil smoke is difficult to adhere stably under vibration and is easily shaken off to the bottom of the pre-purification cylinder 5; the metal particles solidified at high temperature are separated from the edge of the filter hole due to vibration, avoiding sintering in the filter hole; the auxiliary function of the frustum structure: the frustum side is inclined at an angle, wide at the top and narrow at the bottom. When polarization rotates, the impurities on the cylinder wall will slide down the inclined surface due to the combined force of gravity and centrifugal force, further reducing the accumulation of impurities near the filter hole; the filter hole blockage rate is reduced, and the maintenance cycle can be extended; the particle size of the particulate matter in the metal heat treatment exhaust gas varies greatly, and the airflow entering the pre-purification cylinder When the pre-purification cylinder 5 is in operation, uneven flow rates may lead to excessive local filtration load, such as fast flow rates in the center and slow flow rates at the edges; polarization rotation strengthens filtration contact, and when the pre-purification cylinder 5 rotates, the filter hole position moves synchronously with the cylinder body, so that the exhaust gas is in continuous contact with the dynamically changing filter hole area during the flow process, which is equivalent to a disguised increase in the effective filtration area, and more filter holes participate in filtration at the same time; at the same time, the centrifugal force generated by the rotation will cause the metal particles with higher density in the exhaust gas, such as Fe3O4 dust, to move toward the outside of the truncated cone wall due to inertia, actively approaching the filter holes, thereby improving the particle capture rate; the temperature of metal heat treatment exhaust gas is usually high, 200-800℃, such as in annealing and quenching processes, and the pre-purification cylinder 5 is in a high temperature environment for a long time. In an environment, if it is stationary, it is easy to generate thermal stress due to uneven local heating, such as a sudden high temperature at the exhaust gas inlet and a low temperature in other areas of the cylinder wall, which leads to deformation of the filter holes or cracking of the cylinder body; the pre-purification cylinder 5 continuously changes its contact position with the high-temperature exhaust gas during rotation, so that each area of ​​the cylinder wall is heated more evenly, avoiding local excessive temperature; at the same time, the inclined side of the frustum-shaped structure can guide the high-temperature airflow to spiral up along the cylinder wall, reducing the direct impact of the airflow on the cylinder wall and reducing the risk of thermal fatigue damage; compared with the cylindrical shape, the frustum-shaped pre-purification cylinder 5 with a wide top and narrow bottom structure is more in line with the diffusion characteristics of the high-temperature airflow, which can reduce the turbulent impact of the airflow in the cylinder and further reduce the probability of local high temperature concentration; the core function of the pre-purification cylinder 5 is "pretreatment ", providing a basis for subsequent deep purification, such as activated carbon adsorption and electrostatic dust removal; the truncated cone-shaped pre-purification cylinder 5 structure rotates to make the flow path of the exhaust gas in the cylinder more uniform, and large particles of impurities can quickly separate from the airflow through centrifugal force and gravity, reducing the total amount of impurities entering the subsequent pipeline and reducing the filtration pressure of subsequent equipment; the pre-purification cylinder 5 generates polarized rotation mechanical vibration and centrifugal force to solve the problem of filter pore clogging of sticky and high-temperature impurities in the heat treatment exhaust gas; the truncated cone-shaped pre-purification cylinder 5 is adapted to the characteristics of high-temperature airflow, optimizing airflow distribution and heating uniformity; ultimately achieving improved pre-purification efficiency, reduced maintenance costs, and stable system energy consumption, especially adapted to the complex components of metal heat treatment exhaust gas;

[0041] An electrostatic dust removal net cylinder 8 is arranged outside the pre-purification cylinder 5, and the electrostatic dust removal net cylinder 8 is powered by a DC power supply installed on the outside of the equipment; the exhaust gas after pretreatment impacts the electrostatic dust removal net cylinder 8, and is dust-removed by the electrostatic dust removal net cylinder 8, and then enters the interior of the collection cylinder 7, and is discharged from the exhaust pipe 9, and enters the next exhaust gas treatment process; the electrostatic dust removal net cylinder 8 arranged outside the pre-purification cylinder 5 is powered by a DC power supply, which can further purify the pretreated exhaust gas. When the pretreated exhaust gas impacts the electrostatic dust removal net cylinder 8, the electrostatic adsorption effect can be used to efficiently capture the fine particles remaining after pre-purification, thereby greatly improving the overall dust removal efficiency and avoiding fine particles. Entering the subsequent processing link will cause blockage or affect the purification effect; at the same time, the electrostatic dust removal mesh cylinder 8 is installed on the outside of the equipment, with a compact structure design, does not take up too much internal space, and is powered by an external DC power supply, which is convenient for controlling and adjusting the electric field strength, and can be flexibly adjusted according to the concentration of fine particles in the exhaust gas to ensure stable dust removal effect; in addition, when the exhaust gas impacts the mesh cylinder, the airflow is in full contact with the surface of the mesh cylinder, and the electrostatic adsorption effect can be continuously and efficiently exerted, reducing the coverage and pollution of fine particles on subsequent treatment equipment, extending its service life, reducing maintenance costs, and ensuring that the subsequent treatment of gaseous pollutants is more thorough, ultimately achieving a comprehensive improvement in the exhaust gas purification effect and meeting more stringent emission requirements.

[0042] Specific embodiment three: This embodiment is a further limitation of specific embodiment one. The front docking seat 51, the air intake cylinder 52, the air intake pipe 53 and the coil 54 are combined together to form a uniform air distribution mechanism. The air intake pipe 53 is connected to the metal heat treatment exhaust pipe through a flange.

[0043] Multiple groups of through holes are evenly formed on both end surfaces of the collecting tube 7, and multiple groups of screw holes are evenly formed on the front docking seat 51 and the rear docking seat 6. The through holes and the screw holes are connected, and the fixing bolts pass through the through holes formed on the collecting tube 7 and are screwed into the screw holes formed on the docking seat.

[0044] like Figure 1 and Figure 7As shown: the front docking seat 51, the air intake cylinder 52, the air intake pipe 53 and the coil 54 are combined to form a uniform air distribution mechanism, and the exhaust gas can enter the interior of the pre-purification cylinder 5 evenly through the six groups of air intake cylinders 52. The exhaust gas enters the interior of the pre-purification cylinder 5 evenly through the six groups of air intake cylinders 52, which can form a more stable and uniform airflow distribution in the pre-purification cylinder 5, avoiding uneven separation of large particles of impurities caused by local air flow speed being too high or too low, ensuring that the interception efficiency of the pre-purification cylinder 5 for large particles of impurities is more stable, and reducing the escape of impurities caused by air flow turbulence; at the same time, uniform air intake can reduce the airflow resistance inside the pre-purification cylinder 5, avoid the additional load on the equipment caused by excessive local pressure, reduce energy consumption, and allow the exhaust gas to fully contact the filtering or separation structure inside the pre-purification cylinder 5, thereby improving the capture effect of large particles of impurities, providing more stable exhaust gas conditions for subsequent electrostatic dust removal and other processing links, and ensuring the efficient operation of the overall purification system.

[0045] The rotational polarization of the pre-purification cylinder 5 is as follows: the driving motor drives the docking shaft 4 to rotate through the transmission flexible shaft, the docking shaft 4 drives the centrifugal shaft 41 to rotate through the main shaft 3, and the eccentric weight 42 on the centrifugal shaft 41 rotates. When the eccentric weight 42 performs a circular motion, the eccentric weight 42 generates a centrifugal force, causing the main shaft 3 to polarize while rotating. In order to ensure the stability of the main shaft 3 during movement, the two sides of the main shaft 3 are elastically supported by the elastic frame A2 and the elastic frame B21, so that the main shaft 3 and the pre-purification cylinder 5 can move in multiple degrees of freedom. With the elasticity of the buffer spring A24 and the buffer spring B25, the pre-purification cylinder 5 can perform rotational polarization.

Claims

1. A purification device for waste gas used in metal heat treatment, comprising a pre-purification cylinder (5), characterized in that: An outer shaft (43) is fixedly provided inside the pre-cleaning cylinder (5), a centrifugal shaft (41) is fixedly inserted inside the outer shaft (43), an eccentric weight (42) is fixedly provided on the circumferential outer wall of the centrifugal shaft (41), main shafts (3) are fixedly provided at both ends of the centrifugal shaft (41), and elastic frames A (2) and elastic frames B (21) are respectively installed at the ends of the two groups of main shafts (3), an electrostatic dust removal net cylinder (8) is fixedly provided on the outer side of the pre-cleaning cylinder (5), a collecting cylinder (7) is fixedly provided on the outer side of the electrostatic dust removal net cylinder (8), and an exhaust pipe (9) is fixedly provided on the side wall of the collecting cylinder (7).

2. The device for purifying waste gas for metal heat treatment according to claim 1, characterized in that: The axial cross-sections of the pre-cleaning cylinder (5), the collecting cylinder (7) and the electrostatic precipitator net cylinder (8) are concentric circle structures. The pre-cleaning cylinder (5), the collecting cylinder (7) and the electrostatic precipitator net cylinder (8) are all truncated cone-shaped. A plurality of groups of mesh holes are evenly arranged on the electrostatic precipitator net cylinder (8). The electrostatic precipitator net cylinder (8) is powered by a DC power supply installed on the outside of the equipment.

3. The device for purifying waste gas for metal heat treatment according to claim 2, characterized in that: One end of the pre-cleaning cylinder (5) is fixedly provided with a rear docking seat (6), and the other end of the pre-cleaning cylinder (5) is fixedly provided with a front docking seat (51), and both the front docking seat (51) and the rear docking seat (6) are circular. The two sides of the bottom of the collecting cylinder (7) are fixedly connected to the pre-cleaning cylinder (5) through the front docking seat (51) and the rear docking seat (6) respectively.

4. The device for purifying waste gas for metal heat treatment according to claim 1, characterized in that: The cross section of the eccentric hammer (42) is fan-shaped, the end of the centrifugal shaft (41) is fixedly connected to the docking shaft (4), the eccentric hammer (42) is fixedly connected through the centrifugal shaft (41) and the docking shaft (4), the docking shaft (4) is fixedly connected to the output shaft of the driving motor through a transmission flexible shaft, and the driving motor drives the pre-purification cylinder (5) to perform polarization rotation through the docking shaft (4), the centrifugal shaft (41), the eccentric hammer (42), and the outer shaft (43).

5. The device for purifying waste gas for metal heat treatment according to claim 4, characterized in that: The main shafts (3) at both ends of the pre-cleaning cylinder (5) are limitedly supported by elastic frames B (21) and elastic frames A (2). The elastic frames B (21) and elastic frames A (2) have the same structure. The elastic frame A (2) includes a bearing seat (22), a fixing plate (23), a buffer spring A (24), a buffer spring B (25) and an outer frame (26). The main shaft (3) is movably inserted into the interior of the bearing seat (22).

6. The device for purifying waste gas for metal heat treatment according to claim 5, characterized in that: The upper and lower ends of the bearing seat (22) are fixedly provided with fixing plates (23). The bearing seat (22) and the two sets of fixing plates (23) are in a "U" shape. The two sets of fixing plates (23) are respectively fixedly provided with a buffer spring A (24) and a buffer spring B (25). An outer frame (26) is installed on the outer side of the bearing seat (22).

7. The device for purifying waste gas for metal heat treatment according to claim 6, characterized in that: The outer frame (26) is arranged in a rectangular shape. A buffer spring A (24) is fixedly arranged on the upper side of the inner portion of the outer frame (26). A buffer spring B (25) is fixedly arranged on the lower side of the inner portion of the outer frame (26). A support frame (1) is fixedly arranged at the bottom of the elastic frame B (21) and the elastic frame A (2).

8. The device for purifying waste gas for metal heat treatment according to claim 3, characterized in that: Six groups of air intake cylinders (52) are equidistantly arranged on the surface of the front docking seat (51), and two adjacent groups of air intake cylinders (52) are connected via a coil (54), which is C-shaped. An air intake pipe (53) is fixedly arranged on the surface of the air intake cylinder (52).

9. The device for purifying waste gas for metal heat treatment according to claim 8, characterized in that: The front docking seat (51), the air intake cylinder (52), the air intake pipe (53) and the coil (54) are combined together to form a uniform air distribution mechanism, and the air intake pipe (53) is connected to the metal heat treatment exhaust pipe through a flange.

10. The device for purifying waste gas for metal heat treatment according to claim 3, characterized in that: The two end surfaces of the collecting cylinder (7) are evenly provided with a plurality of groups of through holes, and the front docking seat (51) and the rear docking seat (6) are evenly provided with a plurality of groups of screw holes, the through holes and the screw holes are connected, and the fixing bolts pass through the through holes provided on the collecting cylinder (7) and are screwed into the screw holes provided on the docking seat.

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