A gas emission treatment device for hydrochloric acid regeneration acid mist

Abstract

The application relates to the technical field of gas emission, and particularly discloses a gas emission treatment device for hydrochloric acid regeneration acid mist, which comprises a Venturi tube and a demisting pipe, the Venturi tube comprises an air inlet pipe, a throat pipe and an air outlet pipe, a flow uniformizing assembly is arranged on the inner wall of the throat pipe, a plurality of adjusting columns are arranged in the throat pipe, an adjusting mechanism is further arranged on the throat pipe, and a liquid outlet assembly is arranged on the adjusting column; the flow uniformizing assembly can uniformly flow the gas, the gas flow is fully mixed and uniformly enters the throat pipe, the adjusting mechanism can adjust the plurality of adjusting columns, the cross-sectional area of the gas passage is changed, when the input flow of the gas changes, the change of the cross-sectional area of the gas passage can adjust the flow rate of the gas in the gas passage, so that the optimal gas flow rate collides with the absorption liquid for mixing, the liquid outlet assembly on the adjusting column can further make the absorption liquid and the gas fully contact, so that the removal effect of the particulate matters in the gas is improved.

Description

Technical Field

[0001] This application relates to the field of gas emission technology, and in particular to a gas emission treatment device for hydrochloric acid regeneration acid mist. Background Technology

[0002] In industries such as steel and metal processing, hydrochloric acid is commonly used in pickling processes to remove iron oxide and other impurities from metal surfaces. During pickling, hydrochloric acid reacts chemically with iron oxide to produce ferric chloride and hydrogen gas, while simultaneously releasing a large amount of acid mist. The main components of this acid mist include hydrogen chloride gas and iron oxide particles. Direct emission of hydrogen chloride gas and iron oxide particles from hydrochloric acid regeneration acid mist would pose serious hazards to the environment and human health. Therefore, efficient treatment of acid mist is necessary to meet environmental protection requirements.

[0003] In existing technologies, the treatment of iron oxide particles in acid mist mostly employs Venturi scrubbers. Venturi scrubbers mainly consist of a Venturi tube and a demister tube. The Venturi tube is used for gas-liquid mixing, achieving full gas-liquid contact through the Venturi effect. It uses an alkaline solution to neutralize HCl and capture iron oxide particles. The demister tube uses its spiral internal structure to create a swirling gas flow, thereby centrifuging and removing liquid droplets from the gas. The gas is further dried by a demister installed above and inside the demister tube.

[0004] Regarding the aforementioned technologies, uneven gas composition or changes in gas flow rate within the venturi can reduce the gas-liquid mixing effect. Therefore, improvements are made to address this issue. Summary of the Invention

[0005] In order to improve the gas-liquid mixing effect in the venturi tube, this application provides a gas emission treatment device for hydrochloric acid regeneration acid mist.

[0006] This application provides a gas emission treatment device for hydrochloric acid regeneration mist, which adopts the following technical solution:

[0007] A gas emission treatment device for hydrochloric acid regeneration mist includes a venturi tube and a demister tube. The venturi tube is disposed on the demister tube. The venturi tube includes an inlet pipe, a throat pipe, and an outlet pipe. The inlet pipe and the outlet pipe are identically arranged and symmetrically disposed at both ends of the throat pipe. The throat pipe is provided with an inlet for conveying absorbent liquid into the throat pipe. The inner wall of the throat pipe near the end of the inlet pipe is provided with a flow equalization component for equalizing gas flow. The throat pipe is provided with multiple sets of regulating columns, and the space enclosed by the multiple sets of regulating columns is a gas channel. The throat pipe is also provided with an adjustment mechanism for adjusting the multiple sets of regulating columns to change the cross-sectional size of the gas channel. The regulating columns are provided with an outlet component for ensuring sufficient contact between the absorbent liquid and the gas.

[0008] By adopting the above technical solution, after the gas enters the inlet pipe, it is first homogenized by the flow equalization component, so that the gas flow is fully mixed and uniformly enters the throat. Then, the adjustment mechanism adjusts multiple sets of adjustment columns to change the cross-sectional area of ​​the gas channel. When the gas input flow rate changes, the change in the cross-sectional area of ​​the gas channel can adjust the gas flow rate in the gas channel, thereby maintaining the optimal gas flow rate to collide and mix with the absorbent liquid, improving the gas-liquid mixing effect. The liquid outlet component on the adjustment column can further enable the absorbent liquid and gas to fully contact each other, thereby improving the removal effect of particulate matter in the gas.

[0009] Optionally, the flow equalization assembly includes a turbofan, a rotating ring, and a rotating bearing. The turbofan is disposed within the rotating ring and is fixedly connected to the rotating ring. An installation groove is formed on the inner wall of the throat. The rotating bearing is disposed within the installation groove. The outer ring of the rotating bearing is fixedly disposed on the bottom wall of the installation groove. The rotating ring is disposed within the rotating bearing, and the outer wall of the rotating ring is fixedly connected to the inner ring of the rotating bearing. The diameter of the turbofan is the same as the inner diameter of the throat.

[0010] By adopting the above technical solution, the airflow will drive the turbofan to rotate when it passes through the turbofan. The turbofan will drive the rotating ring to rotate in the mounting groove. When the turbofan rotates, it can disturb the airflow passing through the turbofan, so that the airflow is fully mixed and enters the throat. The rotating bearing can reduce the friction force on the rotating ring when it rotates, improve the service life of the turbofan, and reduce the loss of gas kinetic energy.

[0011] Optionally, the adjustment mechanism includes a drive ring, a drive column, a limiting column, a limiting plate, and a power assembly. The drive ring is disposed between the turbofan and the adjustment column and is rotatably mounted on the inner wall of the throat. Multiple sets of drive columns and limiting columns are provided corresponding to multiple sets of adjustment columns. Each set of adjustment columns has a drive groove on its end near the turbofan. Each set of drive columns is disposed on the side of the drive ring away from the turbofan, and the ends of the multiple sets of drive columns away from the turbofan are slidably disposed within the multiple sets of drive grooves. The limiting plate is disposed at the end of the adjusting column away from the turbofan. On the side of the limiting plate near the adjusting column, multiple sets of limiting grooves are formed corresponding to multiple sets of adjusting columns. The multiple sets of limiting columns are respectively disposed at the ends of the multiple sets of adjusting columns away from the turbofan, and the ends of the multiple sets of limiting columns away from the turbofan are respectively disposed in the multiple sets of limiting grooves. The projections of the driving groove and the limiting groove on the horizontal plane are staggered. The power component is disposed on the driving ring and the throat tube, and is used to rotate the driving ring.

[0012] By adopting the above technical solution, the power component can drive the drive ring to rotate. When the drive ring rotates, it can drive the drive column to move within the drive groove. Since the projections of the drive groove and the limiting groove on the horizontal plane are staggered, the limiting column slides within the limiting groove, thus enabling the movement of the adjusting column. This allows for the adjustment of the cross-sectional size of the gas channel. When the gas input flow rate slows down, the cross-sectional area of ​​the gas channel is reduced, thereby increasing the gas flow rate in the throat. When the gas input flow rate speeds up, the cross-sectional area of ​​the gas channel is increased, thereby reducing the gas flow rate in the throat. This achieves the adjustment of the gas flow rate in the throat, maintaining the optimal gas flow rate for collision and mixing with the absorbent liquid, improving the gas-liquid mixing effect. Furthermore, while the adjusting column is moving, it can also automatically scrape off some of the dirt adhering to the contact surface between the adjusting column and the gas, thereby reducing the impact of dirt accumulated over a long period of use on the gas channel.

[0013] Optionally, the power assembly includes a turbine ring, a worm gear, a mounting housing, and a drive motor. The mounting housing is fixedly disposed on the outer wall of the throat tube. The turbine ring is sleeved on the drive ring. The worm gear is rotatably disposed within the mounting housing, and the worm gear and the turbine ring are threadedly connected through the side wall of the throat tube. The drive motor is disposed on the mounting housing, and the output shaft of the drive motor is fixedly connected to one end of the worm gear.

[0014] By adopting the above technical solution, the drive motor installed on the mounting shell is started. The drive motor can drive the worm on the output shaft to rotate. When the worm rotates, it can drive the turbine ring to rotate. Since the turbine ring is sleeved on the drive ring, the drive motor can drive the drive ring to rotate, thereby moving the adjusting column to change the cross-sectional area of ​​the gas channel.

[0015] Optionally, the sidewall of the rotating ring is evenly spaced with multiple sets of centrifugal blocks, each centrifugal block having a centrifugal chamber, each centrifugal chamber having a movable block and a pressure sensor, the movable block being positioned between the pressure sensor and the turbine fan, a spring being positioned between the movable block and the pressure sensor, and the pressure sensor being electrically connected to the drive motor.

[0016] By adopting the above technical solution, the rotating ring can move the movable block away from the turbofan when it rotates, thereby compressing the spring and changing the pressure value detected by the pressure sensor. The higher the pressure value, the higher the gas flow rate, and the lower the pressure value, the lower the gas flow rate. Since the pressure sensor and the drive motor are electrically connected, when the flow rate increases, the drive motor rotates forward, which increases the cross-sectional area of ​​the gas channel. When the flow rate decreases, the drive motor rotates in reverse, which decreases the cross-sectional area of ​​the gas channel, thereby realizing the automatic adjustment of the gas channel cross-section.

[0017] Optionally, the liquid outlet assembly includes a first atomizing nozzle group, a second atomizing nozzle group, a third atomizing nozzle group, and a hose. The first atomizing nozzle group, the second atomizing nozzle group, and the third atomizing nozzle group are respectively spaced apart on the adjusting column. The adjusting column has a liquid supply channel for supplying absorbent liquid to the nozzles of the first atomizing nozzle group, the second atomizing nozzle group, and the third atomizing nozzle group. One end of the hose is connected to the liquid supply channel, and the other end is connected to the liquid inlet. The second atomizing nozzle group is located on the side of the first atomizing nozzle group away from the turbine fan, and the third atomizing nozzle group is located on the side of the second atomizing nozzle group away from the first atomizing nozzle group.

[0018] By adopting the above technical solution, setting up a first atomizing nozzle group, a second atomizing nozzle group, and a third atomizing nozzle group, and setting them in layers at different heights, the effect of gas-liquid mixing and contact can be effectively improved. The hose can effectively connect the liquid inlet and the liquid supply channel when the adjusting column moves. Furthermore, the distance between the first atomizing nozzle group and the second atomizing nozzle group, and between the second atomizing nozzle group and the third atomizing nozzle group can be adjusted when the adjusting column moves, so that the water curtain density can be adjusted according to actual needs.

[0019] Optionally, the first atomizing nozzle group includes a plurality of first atomizing nozzles, which are respectively disposed on several adjacent adjusting columns; the second atomizing nozzle group includes a plurality of second atomizing nozzles, which are respectively disposed on several adjacent adjusting columns and are arranged opposite to the plurality of first atomizing nozzles; the third atomizing nozzle group includes a plurality of third atomizing nozzles, which are respectively disposed on several adjacent adjusting columns and are arranged opposite to the plurality of second atomizing nozzles; the first atomizing nozzles are arranged upwards, the second atomizing nozzles are arranged horizontally, and the third atomizing nozzles are arranged downwards.

[0020] By adopting the above technical solution, multiple first atomizing nozzles are arranged upwards, multiple second atomizing nozzles are arranged horizontally, and multiple third atomizing nozzles are arranged downwards. The first and second atomizing nozzles are arranged opposite each other, and the second and third atomizing nozzles are arranged opposite each other. This can realize that the gas forms an "S" shaped path in the gas channel, thereby further improving the gas-liquid mixing effect and thus improving the removal effect of particulate matter in the gas.

[0021] Optionally, a laser particle size analyzer for capturing the gas-liquid mixture state is provided on the inner wall of the gas outlet pipe.

[0022] By adopting the above technical solution, the laser particle size analyzer can capture and analyze the escaping particles and droplets in the exhaust pipe, thereby adaptively adjusting the size of the liquid atomization output by the first atomizing nozzle, the second atomizing nozzle, and the third atomizing nozzle according to the size and number of particles and mixed droplets, and maintaining the best gas-liquid mixing efficiency.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The power component can drive the drive ring to rotate. When the drive ring rotates, it can drive the drive column to move within the drive groove. Since the projections of the drive groove and the limiting groove on the horizontal plane are staggered, the limiting column slides within the limiting groove, thus enabling the movement of the adjusting column. This allows for the adjustment of the cross-sectional size of the gas channel. When the gas input flow rate slows down, the cross-sectional area of ​​the gas channel is reduced, thereby increasing the gas flow rate in the throat. When the gas input flow rate speeds up, the cross-sectional area of ​​the gas channel is increased, thereby reducing the gas flow rate in the throat. This achieves the adjustment of the gas flow rate in the throat, maintaining the optimal gas flow rate for collision and mixing with the absorbent liquid, improving the gas-liquid mixing effect. Furthermore, while the adjusting column is moving, it can also automatically scrape off some of the dirt adhering to the contact surface between the adjusting column and the gas, thereby reducing the impact of dirt accumulation on the gas channel after long-term use.

[0025] 2. When the rotating ring rotates, it can move the movable block away from the turbofan, thereby compressing the spring and changing the pressure value detected by the pressure sensor. The higher the pressure value, the higher the gas flow rate, and the lower the pressure value, the lower the gas flow rate. Since the pressure sensor and the drive motor are electrically connected, when the flow rate increases, the drive motor rotates forward, which increases the cross-sectional area of ​​the gas channel. When the flow rate decreases, the drive motor rotates in reverse, which decreases the cross-sectional area of ​​the gas channel, thereby realizing the automatic adjustment of the gas channel cross-section.

[0026] 3. Multiple first atomizing nozzles are arranged upwards, multiple second atomizing nozzles are arranged horizontally, and multiple third atomizing nozzles are arranged downwards. The first and second atomizing nozzles are arranged opposite each other, and the second and third atomizing nozzles are arranged opposite each other. This can realize that the gas forms an "S" shaped path in the gas channel, thereby further improving the gas-liquid mixing effect and thus improving the removal effect of particulate matter in the gas. Furthermore, when the adjusting column moves, the spacing between the first and second atomizing nozzle groups, and between the second and third atomizing nozzle groups can be adjusted, so that the water curtain density can be adjusted according to actual needs.

[0027] 4. The laser particle size analyzer can capture and analyze the escaping particles and droplets in the exhaust pipe, thereby adaptively adjusting the size of the liquid atomization output from the first, second, and third atomizing nozzles according to the size and number of particles and mixed droplets, maintaining the best gas-liquid mixing efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0030] Figure 2 yes Figure 1 A partial structural cross-sectional schematic diagram;

[0031] Figure 3 yes Figure 2 Partial structural diagram;

[0032] Figure 4 yes Figure 3 Partial structural explosion diagram;

[0033] Figure 5 yes Figure 4 Another perspective;

[0034] Figure 6 yes Figure 5 A partial structural cross-sectional schematic diagram;

[0035] Figure 7 yes Figure 5 Partial structural diagram;

[0036] Reference numerals: 1. Venturi tube; 11. Inlet pipe; 12. Throat pipe; 121. Liquid inlet; 122. Adjusting column; 13. Outlet pipe; 2. Demisting pipe; 3. Flow equalization assembly; 31. Turbine fan; 32. Rotating ring; 33. Rotating bearing; 4. Adjustment mechanism; 41. Drive ring; 42. Drive column; 43. Limiting column; 44. Limiting plate; 45. Power assembly; 451. Turbine ring; 452. Worm gear; 453. Mounting housing; 454. Drive motor; 46. Drive groove; 47. Limiting groove; 5. Liquid outlet assembly; 51. First atomizing nozzle group; 52. Second atomizing nozzle group; 53. Third atomizing nozzle group; 54. Hose; 6. Centrifuge block; 61. Movable block; 62. Pressure sensor; 63. Spring; 7. Laser particle size analyzer. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0038] This application discloses a gas emission treatment device for hydrochloric acid regeneration acid mist, referring to... Figures 1-7 A gas emission treatment device for hydrochloric acid regeneration acid mist includes a venturi tube 1 and a demister tube 2. The venturi tube 1 is disposed on the demister tube 2. The venturi tube 1 includes an inlet pipe 11, a throat pipe 12 and an outlet pipe 13. The inlet pipe 11 and the outlet pipe 13 are identically disposed and symmetrically welded to both ends of the throat pipe 12. The throat pipe 12 is provided with an inlet port 121 for conveying absorbent liquid into the throat pipe 12. A flow equalization component 3 is installed on the inner wall of the end of the throat pipe 12 near the inlet pipe 11. Multiple sets of regulating columns 122 are movably installed inside the throat pipe 12. The space enclosed by the multiple sets of regulating columns 122 is a gas channel. An regulating mechanism 4 is also installed on the throat pipe 12. An outlet component 5 is installed on the regulating columns 122.

[0039] After the gas enters the inlet pipe 11, it is first evenly mixed by the flow equalization component 3, so that the gas flow is fully mixed and enters the throat pipe 12. Then, the adjustment mechanism 4 adjusts multiple sets of adjustment columns 122 to change the cross-sectional area of ​​the gas channel. When the gas input flow rate changes, the change in the cross-sectional area of ​​the gas channel can adjust the gas flow rate in the gas channel, thereby maintaining the optimal gas flow rate to collide and mix with the absorbent liquid, improving the gas-liquid mixing effect. The liquid outlet component 5 on the adjustment column 122 can further enable the absorbent liquid and gas to fully contact each other, thereby improving the removal effect of particulate matter in the gas.

[0040] When the gas composition entering the throat 12 is uneven, the gas-liquid mixing effect may be relatively poor. Therefore, it is necessary to fully mix the gas entering the throat 12. Thus, the flow equalization component 3 in this embodiment includes a turbo fan 31, a rotating ring 32, and a rotating bearing 33. The turbo fan 31 is fixedly installed inside the rotating ring 32 and welded to the rotating ring 32. An installation groove is provided on the inner wall of the throat 12. The rotating bearing 33 is installed in the installation groove. The outer ring of the rotating bearing 33 is fixedly welded to the bottom wall of the installation groove. The rotating ring 32 is installed inside the rotating bearing 33, and the outer wall of the rotating ring 32 is welded to the inner ring of the rotating bearing 33. The diameter of the turbo fan 31 is the same as the inner diameter of the throat 12.

[0041] As the airflow passes through the turbofan 31, it causes the turbofan 31 to rotate. The turbofan 31 drives the rotating ring 32 to rotate within the mounting groove. When the turbofan 31 rotates, it can disturb the airflow passing through it, so that the airflow is fully mixed and enters the throat 12 evenly. The rotating bearing 33 can reduce the friction force on the rotating ring 32 during rotation, thereby improving the service life of the turbofan 31 and reducing the loss of gas kinetic energy.

[0042] To adjust the cross-sectional area of ​​the gas passage by adjusting multiple sets of adjusting columns 122, the adjusting mechanism 4 in this embodiment includes a drive ring 41, a drive column 42, a limiting column 43, a limiting plate 44, and a power assembly 45. The drive ring 41 is installed between the turbofan 31 and the adjusting column 122 and is rotatably mounted on the inner wall of the throat tube 12. Multiple sets of drive columns 42 and limiting columns 43 are provided corresponding to the multiple sets of adjusting columns 122. Each set of adjusting columns 122 has a drive groove 46 on its end near the turbofan 31. The multiple sets of drive columns 42 are integrally disposed on the side of the drive ring 41 away from the turbofan 31. One end of each is slidably installed in multiple sets of drive grooves 46. The limiting plate 44 is installed at the end of the adjusting column 122 away from the turbofan 31. On the side of the limiting plate 44 near the adjusting column 122, multiple sets of limiting grooves 47 are opened corresponding to the multiple sets of adjusting columns 122. Multiple sets of limiting columns 43 are integrally set at the end of the multiple sets of adjusting columns 122 away from the turbofan 31. The ends of the multiple sets of limiting columns 43 away from the turbofan 31 are slidably installed in multiple sets of limiting grooves 47. The projections of the drive grooves 46 and the limiting grooves 47 on the horizontal plane are staggered. The power component 45 is set on the drive ring 41 and the throat tube 12 to make the drive ring 41 rotate.

[0043] The power assembly 45 can drive the drive ring 41 to rotate. When the drive ring 41 rotates, it can drive the drive column 42 to move within the drive groove 46. Since the projections of the drive groove 46 and the limiting groove 47 on the horizontal plane are staggered, the limiting column 43 slides within the limiting groove 47. Therefore, the adjustment column 122 can be moved, thereby adjusting the cross-sectional size of the gas channel. When the gas input flow rate slows down, the cross-sectional area of ​​the gas channel is reduced, thereby increasing the gas flow rate in the throat tube 12. When the gas input flow rate speeds up, the cross-sectional area of ​​the gas channel is increased, thereby reducing the gas flow rate in the throat tube 12. This achieves the adjustment of the gas flow rate in the throat tube 12, thereby maintaining the optimal gas flow rate for collision and mixing with the absorbent liquid, improving the gas-liquid mixing effect. Furthermore, while the adjustment column 122 is moving, it can also automatically scrape off some of the dirt attached to the contact surface between the adjustment column 122 and the gas, thereby reducing the impact of dirt accumulated over a long period of use on the gas channel.

[0044] The power assembly 45 in this embodiment includes a turbine ring 451, a worm gear 452, a mounting shell 453, and a drive motor 454. The mounting shell 453 is fixedly welded to the outer wall of the throat pipe 12. The turbine ring 451 is sleeved and welded to the drive ring 41. The worm gear 452 is rotatably mounted inside the mounting shell 453, and the worm gear 452 and the turbine ring 451 are threaded through the side wall of the throat pipe 12. The drive motor 454 is bolted to the mounting shell 453, and the output shaft of the drive motor 454 is fixedly connected to one end of the worm gear 452. When the drive motor 454 mounted on the mounting shell 453 is started, the drive motor 454 can drive the worm gear 452 on the output shaft to rotate. When the worm gear 452 rotates, it can drive the turbine ring 451 to rotate. Since the turbine ring 451 is sleeved on the drive ring 41, the drive motor 454 can drive the drive ring 41 to rotate, thereby moving the adjusting column 122 to change the cross-sectional area of ​​the gas passage.

[0045] In this embodiment, multiple sets of centrifugal blocks 6 are integrally and evenly spaced on the side wall of the rotating ring 32. Each centrifugal block 6 contains a centrifugal chamber, within which a movable block 61 and a pressure sensor 62 are movably mounted. The movable block 61 is installed between the pressure sensor 62 and the turbofan 31, and a spring 63 is installed between the movable block 61 and the pressure sensor 62. The pressure sensor 62 is electrically connected to the drive motor 454. When the rotating ring 32 rotates, the movable block 61 moves away from the turbofan 31, thereby compressing the spring 63 and changing the pressure value detected by the pressure sensor 62. A higher pressure value indicates a higher gas flow rate, and a lower pressure value indicates a lower gas flow rate. Since the pressure sensor 62 is electrically connected to the drive motor 454, when an increase in flow rate is detected, the drive motor 454 rotates forward, increasing the cross-sectional area of ​​the gas channel; when a decrease in flow rate is detected, the drive motor 454 rotates in reverse, decreasing the cross-sectional area of ​​the gas channel, thus achieving automatic adjustment of the gas channel cross-section.

[0046] To further improve the gas-liquid mixing effect, the liquid outlet assembly 5 in this embodiment includes a first atomizing nozzle group 51, a second atomizing nozzle group 52, a third atomizing nozzle group 53, and a hose 54. The first atomizing nozzle group 51, the second atomizing nozzle group 52, and the third atomizing nozzle group 53 are respectively installed at intervals on the adjusting column 122. The adjusting column 122 has a liquid supply channel for supplying absorbent liquid to the first atomizing nozzle group 51, the second atomizing nozzle group 52, and the third atomizing nozzle group. One end of the hose 54 is connected to the liquid supply channel, and the other end is connected to the liquid inlet 121. The second atomizing nozzle group 52 is located on the side of the first atomizing nozzle group 51 away from the turbofan 31, and the third atomizing nozzle group 53 is located on the side of the second atomizing nozzle group 52 away from the first atomizing nozzle group 51. The first atomizing nozzle group 51, the second atomizing nozzle group 52, and the third atomizing nozzle group 53 are set up in layers at different heights, which can effectively improve the gas-liquid mixing and contact effect. The hose 54 can effectively connect the liquid inlet 121 and the liquid supply channel when the adjusting column 122 moves.

[0047] In this embodiment, the first atomizing nozzle group 51 includes multiple first atomizing nozzles, which are respectively disposed on several adjacent adjusting columns 122. The second atomizing nozzle group 52 includes multiple second atomizing nozzles, which are respectively disposed on several adjacent adjusting columns 122 and are arranged opposite to the multiple groups of first atomizing nozzles. The third atomizing nozzle group 53 includes multiple third atomizing nozzles, which are respectively disposed on several adjacent adjusting columns 122 and are arranged opposite to the multiple groups of second atomizing nozzles. The first atomizing nozzles are arranged upwards, the second atomizing nozzles are arranged horizontally, and the third atomizing nozzles are arranged downwards. The upward arrangement of the multiple first atomizing nozzles, the horizontal arrangement of the multiple second atomizing nozzles, and the downward arrangement of the multiple third atomizing nozzles, along with the opposite arrangement of the first and second atomizing nozzles and the opposite arrangement of the second and third atomizing nozzles, allows the gas to form an "S"-shaped path within the gas channel, thereby further improving the gas-liquid mixing effect and thus enhancing the removal effect of particulate matter from the gas.

[0048] In this embodiment, a laser particle size analyzer 7 is installed on the inner wall of the exhaust pipe 13. The laser particle size analyzer 7 can capture and analyze the escaping particles and droplets in the exhaust pipe 13, thereby adaptively adjusting the size of the liquid atomization output by the first atomizing nozzle, the second atomizing nozzle, and the third atomizing nozzle according to the size and number of particles and mixed droplets, so as to maintain the optimal gas-liquid mixing efficiency.

[0049] The implementation principle of the gas emission treatment device for hydrochloric acid regeneration mist in this application embodiment is as follows:

[0050] As the airflow passes through the turbofan 31, it drives the turbofan 31 to rotate. The turbofan 31 then drives the rotating ring 32 to rotate within the mounting groove. The rotation of the turbofan 31 disturbs the airflow passing through it, ensuring thorough mixing before it enters the throat 12. The rotation of the rotating ring 32 causes the movable block 61 to move away from the turbofan 31, thereby compressing the spring 63. This changes the pressure value detected by the pressure sensor 62. A higher pressure value indicates a higher gas flow rate, and a lower pressure value indicates a lower gas flow rate. Since the pressure sensor 62 is electrically connected to the drive motor 454, when an increase in flow rate is detected, the drive... When motor 454 rotates forward, it drives the worm gear 452 on the output shaft to rotate. The rotation of the worm gear 452 drives the turbine ring 451 to rotate. Since the turbine ring 451 is fitted onto the drive ring 41, the drive motor 454 drives the drive ring 41 to rotate. The rotation of the drive ring 41 causes the drive column 42 to move within the drive groove 46. Because the projections of the drive groove 46 and the limiting groove 47 on the horizontal plane are staggered, the limiting column 43 slides within the limiting groove 47, thus enabling the movement of the adjusting column 122. This increases the cross-sectional area of ​​the gas passage, thereby reducing the gas velocity within the throat 12. Conversely, when the gas input velocity decreases, the cross-sectional area of ​​the gas passage decreases, thereby increasing the gas velocity within the throat 12. This maintains optimal gas velocity for collision and mixing with the absorbent liquid, improving the gas-liquid mixing effect.

[0051] This embodiment also discloses a gas emission treatment process for hydrochloric acid regeneration mist, including the following steps:

[0052] S1: The exhaust gas generated by the roasting furnace is first cooled by a concentrator and some Fe2O3 particles are removed.

[0053] S2: For the tail gas obtained in step S1, most of the HCl is removed by an absorption tower to obtain regenerated acid;

[0054] S3: The tail gas obtained in step S2 is introduced into the waste acid scrubbing tower and waste acid is introduced for spraying to remove some Fe2O3 particles; the resulting waste acid liquid is simultaneously introduced into the concentrator in step S1 for concentration and heating, and then introduced into the roasting furnace for roasting.

[0055] S4: The exhaust gas obtained in step S3 is introduced into a Venturi scrubber. The Fe2O3 particles in the exhaust gas are adsorbed by the liquid in the Venturi scrubber and then separated into gas and water. The liquid discharged from the Venturi scrubber enters the absorption tower in step S2 for spraying.

[0056] S5: The exhaust gas obtained in step S4 is introduced into a quench tower for cooling; part of the condensate generated in the quench tower is simultaneously introduced into a Venturi scrubber as the adsorption liquid for Fe2O3 particles in the exhaust gas.

[0057] S6: The tail gas obtained in step S5 is introduced into the demineralized water scrubbing tower, and demineralized water is simultaneously introduced for spraying to remove some Fe2O3 particles and HCl. The demineralized water generated by the spraying is simultaneously introduced into the Venturi scrubber as the adsorption liquid for Fe2O3 particles in the tail gas.

[0058] S7: The exhaust gas obtained in step S6 is introduced into a wet electrostatic precipitator to further remove Fe2O3 particles, and the final exhaust gas is discharged through a chimney.

[0059] More preferably, in step S7, the HCl concentration in the exhaust gas entering the wet electrostatic precipitator is less than 10 mg / Nm³, the Fe2O3 concentration is between 10 mg / Nm³ and 20 mg / Nm³, and the temperature is less than 50°C; the Fe2O3 and HCl concentrations in the exhaust gas discharged from the wet electrostatic precipitator are both less than 10 mg / Nm³.

[0060] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "an," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0061] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas emission treatment device for hydrochloric acid regenerating acid mist comprising a venturi (1) and a demister pipe (2), characterized in that: The venturi (1) is arranged on the demisting pipe (2), the venturi (1) comprises an air inlet pipe (11), a throat pipe (12) and an air outlet pipe (13), the air inlet pipe (11) and the air outlet pipe (13) are arranged symmetrically at two ends of the throat pipe (12), a liquid inlet (121) for conveying absorption liquid into the throat pipe (12) is arranged on the throat pipe (12), a flow uniformizing assembly (3) for uniformizing gas flow is arranged on the inner wall of the end of the throat pipe (12) close to the air inlet pipe (11), a plurality of adjusting columns (122) are arranged in the throat pipe (12), the space surrounded by the plurality of adjusting columns (122) is a gas passage, an adjusting mechanism (4) for adjusting the plurality of adjusting columns (122) to change the cross-sectional size of the gas passage is further arranged on the throat pipe (12), and a liquid outlet assembly (5) for fully contacting absorption liquid and gas is arranged on the adjusting column (122); The flow uniformizing assembly (3) comprises a vortex fan (31), a rotating ring (32) and a rotating bearing (33), the vortex fan (31) is arranged in the rotating ring (32) and fixedly connected to the rotating ring (32), an installation groove is formed in the inner wall of the throat pipe (12), the rotating bearing (33) is arranged in the installation groove, the outer ring of the rotating bearing (33) is fixedly arranged on the bottom wall of the installation groove, the rotating ring (32) is arranged in the rotating bearing (33), and the outer wall of the rotating ring (32) is fixedly connected to the inner ring of the rotating bearing (33), and the diameter of the vortex fan (31) is the same as the inner diameter of the throat pipe (12). The adjusting mechanism (4) comprises a driving ring (41), a driving column (42), a limiting column (43), a limiting disc (44) and a power assembly (45), the driving ring (41) is arranged between the turbofan (31) and the adjusting column (122), and is rotationally arranged on the inner wall of the throat pipe (12), the driving column (42) and the limiting column (43) are correspondingly provided with a plurality of groups, the adjusting column (122) is provided with a plurality of groups, the end of the adjusting column (122) close to the turbofan (31) is provided with a driving groove (46), the driving column (42) is arranged on the side of the driving ring (41) away from the turbofan (31), and the end of the driving column (42) away from the turbofan (31) is slidingly arranged in the driving groove (46). The limiting disc (44) is arranged at the end of the adjusting column (122) away from the turbofan (31), a plurality of limiting grooves (47) are formed in the side of the limiting disc (44) close to the adjusting column (122), the limiting column (43) is arranged at the end of the adjusting column (122) away from the turbofan (31), and the end of the limiting column (43) away from the turbofan (31) is arranged in the limiting groove (47). The projections of the driving groove (46) and the limiting groove (47) on the horizontal plane are arranged in a staggered manner, and the power assembly (45) is arranged on the driving ring (41) and the throat pipe (12) and used for rotating the driving ring (41).

2. A gas emission treatment device for hydrochloric acid regenerating acid mist according to claim 1, characterized by: The power assembly (45) comprises a turbine ring (451), a worm (452), a mounting shell (453) and a driving motor (454), the mounting shell (453) is fixedly arranged on the outer wall of the throat pipe (12), the turbine ring (451) is sleeved on the driving ring (41), the worm (452) is rotationally arranged in the mounting shell (453), and the worm (452) and the turbine ring (451) are threadedly connected through the side wall of the throat pipe (12), and the driving motor (454) is arranged on the mounting shell (453), and the output shaft of the driving motor (454) is fixedly connected with one end of the worm (452).

3. A gas emission treatment apparatus for hydrochloric acid regenerating acid mist according to claim 2, characterized by: The side wall of the rotating ring (32) is uniformly and spacedly provided with a plurality of centrifugal blocks (6), a centrifugal cavity is formed in the centrifugal block (6), a movable block (61) and a pressure sensor (62) are arranged in the centrifugal cavity, the movable block (61) is arranged between the pressure sensor (62) and the turbofan (31), a spring (63) is arranged between the movable block (61) and the pressure sensor (62), and the pressure sensor (62) is electrically connected with the driving motor (454).

4. A gas emission treatment apparatus for hydrochloric acid regenerating acid mist according to claim 2, characterized by: The liquid outlet assembly (5) comprises a first atomizing nozzle group (51), a second atomizing nozzle group (52), a third atomizing nozzle group (53) and a hose (54), the first atomizing nozzle group (51), the second atomizing nozzle group (52) and the third atomizing nozzle group (53) are respectively arranged on the adjusting column (122) at intervals, the adjusting column (122) is provided with a liquid supply channel for supplying the absorbing liquid to the first atomizing nozzle group (51), the second atomizing nozzle group (52) and the third atomizing nozzle group (53), one end of the hose (54) is connected with the liquid supply channel, and the other end is connected with the liquid inlet (121), the second atomizing nozzle group (52) is located on the side of the first atomizing nozzle group (51) away from the turbofan (31), and the third atomizing nozzle group (53) is located on the side of the second atomizing nozzle group (52) away from the first atomizing nozzle group (51).

5. A gas emission treatment apparatus for hydrochloric acid regenerating acid mist according to claim 4, characterized by: The first atomizing nozzle group (51) comprises a plurality of first atomizing nozzles, the plurality of first atomizing nozzles are respectively arranged on several adjacent adjusting columns (122), the second atomizing nozzle group (52) comprises a plurality of second atomizing nozzles, the plurality of second atomizing nozzles are respectively arranged on several adjacent adjusting columns (122) and are arranged opposite to the plurality of first atomizing nozzle groups, the third atomizing nozzle group (53) comprises a plurality of third atomizing nozzles, the plurality of third atomizing nozzles are respectively arranged on several adjacent adjusting columns (122) and are arranged opposite to the plurality of second atomizing nozzle groups, the first atomizing nozzles are arranged upward, the second atomizing nozzles are arranged horizontally, and the third atomizing nozzles are arranged downward.

6. A gas emission treatment device for hydrochloric acid regenerating acid mist according to claim 1, characterized by: The inner wall of the gas outlet pipe (13) is provided with a laser particle size analyzer (7) for capturing the gas-liquid mixed state.

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