Gas emission treatment device for hydrochloric acid regeneration acid mist

Abstract

The invention relates to the technical field of gas emission, and particularly discloses a hydrochloric acid regeneration acid mist gas emission treatment device which comprises a Venturi tube and a demisting pipe, the Venturi tube comprises a gas inlet pipe, a throat pipe and a gas outlet pipe, a flow equalizing 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 the demisting pipe is connected with the Venturi tube. A liquid outlet assembly is arranged on the adjusting column; the flow equalizing assembly can equalize the flow of the gas, so that the gas flow is fully mixed and uniformly enters the throat pipe, the adjusting mechanism can adjust the multiple groups of adjusting columns, the cross sectional area of the gas channel is changed, and when the input flow of the gas is changed, the flow of the gas is changed. The flow rate of the gas in the gas channel can be adjusted by changing the cross sectional area of the gas channel, so that the optimal gas flow rate is kept to be collided and mixed with the absorption liquid, and the absorption liquid and the gas can be further fully contacted by the liquid outlet assembly on the adjusting column, so that the effect of removing particulate matters in the gas is improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas emission, and in particular to a gas emission treatment device for hydrochloric acid regeneration acid mist. Background Art

[0002] In the steel and metal processing industries, hydrochloric acid is often used in pickling processes to remove iron oxide and other impurities from the metal surface. During the pickling process, hydrochloric acid reacts with iron oxide to generate ferric chloride and hydrogen, while releasing a large amount of acid mist. The main components of these acid mists include hydrogen chloride gas, iron oxide particles, etc. If the hydrogen chloride gas and iron oxide particles in the hydrochloric acid regeneration mist are directly discharged, it will cause serious harm to the environment and human health. Therefore, the acid mist needs to be efficiently treated to meet environmental protection requirements.

[0003] In the prior art, most of the iron oxide particles in the acid mist are treated with a Venturi scrubber, which mainly includes a Venturi tube and a demister. The Venturi tube is used for gas-liquid mixing, and achieves full contact between gas and liquid through the Venturi effect. The alkaline solution is used to neutralize HCl and capture the iron oxide particles. The demister uses its spiral internal structure to make the gas have a swirling airflow, thereby centrifugally removing droplets in the gas, and further drying the gas through a demister installed above the inside of the demister.

[0004] Regarding the above-mentioned related technologies, when the gas composition input into the venturi tube is uneven and the gas flow rate input into the venturi tube changes, it is possible that the gas-liquid mixing effect in the venturi tube is reduced, so improvements are made in this regard. Summary of the invention

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

[0006] The present application provides a gas emission treatment device for hydrochloric acid regeneration acid mist, which adopts the following technical solution: A gas emission treatment device for hydrochloric acid regeneration acid mist comprises a venturi tube and a demister tube, wherein the venturi tube is arranged on the demister tube, the venturi tube comprises an air inlet tube, a throat tube and an air outlet tube, the air inlet tube and the air outlet tube are arranged in the same manner and are symmetrically arranged at both ends of the throat tube, the throat tube is provided with a liquid inlet for conveying absorption liquid into the throat tube, a flow equalizing component for equalizing the flow of gas is arranged on the inner wall of the end of the throat tube close to the air inlet tube, a plurality of groups of regulating columns are arranged inside the throat tube, the space enclosed by the plurality of groups of regulating columns is a gas channel, the throat tube is also provided with an adjusting mechanism for adjusting the plurality of groups of regulating columns to change the cross-sectional size of the gas channel, and a liquid outlet component for fully contacting the absorption liquid and the gas is arranged on the regulating column.

[0007] By adopting the above technical solution, after the gas enters the air inlet pipe, the gas is first evenly flowed under the action of the flow equalizing component, so that the airflow is fully mixed and evenly enters the throat, and then the multiple groups of adjusting columns are adjusted through the adjusting mechanism to achieve the change of the cross-sectional area of ​​the gas channel. When the input flow rate of the gas changes, the change in the cross-sectional area of ​​the gas channel can adjust the flow rate of the gas in the gas channel, thereby maintaining the optimal gas flow rate for collision and mixing with the absorption liquid, thereby improving the effect of gas-liquid mixing, and the liquid outlet component on the adjusting column can further make the absorption liquid and the gas fully contact, thereby improving the effect of removing particulate matter in the gas.

[0008] Optionally, the flow balancing component includes a turbofan, a rotating ring and a rotating bearing, the turbofan is arranged in the rotating ring and fixedly connected to the rotating ring, an installation groove is opened on the inner wall of the throat, the rotating bearing is arranged in the installation groove, the outer ring of the rotating bearing is fixedly arranged on the bottom wall of the installation groove, the rotating ring is arranged in the rotating bearing, and the outer wall of the rotating ring is fixedly connected to the inner ring of the rotating bearing, and the diameter of the turbofan is set to the same as the inner diameter of the throat.

[0009] By adopting the above technical solution, the airflow passing through the turbofan will drive the turbofan to rotate, and the turbofan drives the rotating ring to rotate in the installation groove. When the turbofan rotates, the airflow passing through the turbofan can be disturbed, so that the airflow can be fully mixed and evenly enter the throat. The rotating bearing can reduce the friction force on the rotating ring during rotation, thereby increasing the service life of the turbofan and reducing the loss of gas kinetic energy.

[0010] Optionally, the adjustment mechanism includes a driving ring, a driving column, a limiting column, a limiting plate and a power assembly, the driving ring is arranged between the turbofan and the adjusting column, and is rotatably arranged on the inner wall of the throat, the driving column and the limiting column are arranged in a plurality of groups corresponding to the plurality of groups of adjusting columns, and the ends of the plurality of groups of adjusting columns close to the turbofan are provided with driving grooves, the plurality of groups of driving columns are arranged on a surface of the driving ring away from the turbofan, and the ends of the plurality of groups of driving columns away from the turbofan are respectively slidably arranged in the plurality of groups of driving grooves The limit plate is arranged at one end of the adjusting column away from the turbofan, and a plurality of limit grooves are provided on a surface of the limit plate close to the adjusting column corresponding to the plurality of adjusting columns. The plurality of limit columns are respectively arranged at one end of the plurality of adjusting columns away from the turbofan, and the ends of the plurality of limit columns away from the turbofan are respectively arranged in the plurality of limit grooves. The projections of the driving groove and the limit groove on the horizontal plane are staggered with each other. The power assembly is arranged on the driving ring and the throat for rotating the driving ring.

[0011] By adopting the above technical scheme, the power component can drive the driving ring to rotate, and when the driving ring rotates, it can drive the driving column to move in the driving groove. Since the projections of the driving groove and the limit groove on the horizontal plane are staggered with each other, the limit column slides in the limit groove, so the movement of the adjustment column can be realized, thereby adjusting the cross-sectional size of the gas channel. When the flow rate of the gas input slows down, the cross-sectional area of ​​the gas channel is reduced, thereby increasing the flow rate of the gas in the throat. When the flow rate of the gas input speeds up, the cross-sectional area of ​​the gas channel is increased, thereby reducing the flow rate of the gas in the throat, thereby adjusting the gas flow rate in the throat, thereby maintaining the optimal gas flow rate for collision and mixing with the absorption liquid, and improving the effect of gas-liquid mixing. In addition, when the adjustment column moves, it can also automatically scrape off some dirt attached to the contact surface between the adjustment column and the gas, thereby reducing the impact of dirt accumulated after long-term use on the gas channel.

[0012] Optionally, the power assembly includes a turbine ring, a worm, a mounting shell and a drive motor, the mounting shell is fixedly arranged on the outer wall of the throat, the turbine ring is sleeved on the drive ring, the worm is rotatably arranged in the mounting shell, and the worm and the turbine ring are threadedly connected through the side wall of the throat, the drive motor is arranged on the mounting shell, and the output shaft of the drive motor is fixedly connected to one end of the worm.

[0013] By adopting the above technical solution, the drive motor installed on the mounting shell is started, and 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 adjustment column to change the cross-sectional area of ​​the gas channel.

[0014] Optionally, a plurality of groups of centrifugal blocks are evenly spaced apart on the side wall of the rotating ring, a centrifugal chamber is provided in the centrifugal block, a movable block and a pressure sensor are provided in the centrifugal chamber, the movable block is provided between the pressure sensor and the turbofan, a spring is provided between the movable block and the pressure sensor, and the pressure sensor is electrically connected to the drive motor.

[0015] By adopting the above technical solution, the rotating ring can move the movable block away from the turbofan when rotating, thereby compressing the spring, thereby changing the pressure value detected by the pressure sensor. The larger the pressure value, the greater the gas flow rate, and the smaller the pressure value, the smaller the gas flow rate. Since the pressure sensor and the drive motor are electrically connected, when the flow rate is detected to increase, the drive motor rotates forward to increase the cross-sectional area of ​​the gas channel. When the flow rate is detected to decrease, the drive motor reverses to reduce the cross-sectional area of ​​the gas channel, thereby realizing automatic adjustment of the gas channel cross-section.

[0016] Optionally, the liquid outlet component 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, a liquid supply channel for conveying absorption liquid to the first atomizing nozzle group, the second atomizing nozzle group and the third atomizing nozzle group nozzles is opened in the adjusting column, 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 turbofan, and the third atomizing nozzle group is located on the side of the second atomizing nozzle group away from the first atomizing nozzle group.

[0017] By adopting the above technical scheme, a first atomizing nozzle group, a second atomizing nozzle group and a third atomizing nozzle group are set, and they are arranged in layers in height, which can effectively improve the effect of gas-liquid mixing contact. The hose can achieve effective connection between the liquid inlet and the liquid supply channel when the adjusting column moves, and the spacing 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 can adjust the water curtain density according to actual needs.

[0018] Optionally, the first atomizing nozzle group includes multiple first atomizing nozzles, which are respectively arranged on several adjacent adjusting columns; the second atomizing nozzle group includes multiple second atomizing nozzles, which are respectively arranged on several adjacent adjusting columns and are arranged opposite to the multiple groups of first atomizing nozzles; the third atomizing nozzle group includes multiple third atomizing nozzles, which are respectively arranged on several adjacent adjusting columns and are arranged opposite to the multiple groups of second atomizing nozzles; the first atomizing nozzles are arranged upward, the second atomizing nozzles are arranged horizontally, and the third atomizing nozzles are arranged downward.

[0019] By adopting the above technical solution, multiple first atomizing nozzles are arranged upward, multiple second atomizing nozzles are arranged horizontally, multiple third atomizing nozzles are arranged downward, and the first atomizing nozzle and the second atomizing nozzle are arranged opposite to each other, and the second atomizing nozzle and the third atomizing nozzle are arranged opposite to each other, so that the gas can form an "S" shaped path in the gas channel, thereby further improving the gas-liquid mixing effect, thereby improving the removal effect of particulate matter in the gas.

[0020] Optionally, a laser particle size analyzer for capturing the gas-liquid mixing state is provided on the inner wall of the gas outlet pipe.

[0021] 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 atomization nozzle, the second atomization nozzle and the third atomization nozzle according to the size and number of the particles and the mixed droplets, so as to maintain the optimal gas-liquid mixing efficiency.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. The power assembly can drive the driving ring to rotate, and when the driving ring rotates, it can drive the driving column to move in the driving groove. Since the projections of the driving groove and the limit groove on the horizontal plane are staggered, the limit column slides in the limit groove, so the movement of the adjustment column can be realized, thereby adjusting the cross-sectional size of the gas channel. When the flow rate of the gas input slows down, the cross-sectional area of ​​the gas channel is reduced, thereby increasing the flow rate of the gas in the throat. When the flow rate of the gas input speeds up, the cross-sectional area of ​​the gas channel is increased, thereby reducing the flow rate of the gas in the throat, thereby adjusting the gas flow rate in the throat, thereby maintaining the best gas flow rate to collide and mix with the absorption liquid, and improving the effect of gas-liquid mixing. In addition, when the adjustment column moves, it can also automatically scrape off part of the dirt attached to the contact surface between the adjustment column and the gas, thereby reducing the impact of the dirt accumulated after long-term use on the gas channel; 2. When the rotating ring rotates, the movable block can move away from the turbofan, thereby compressing the spring, thereby changing the pressure value detected by the pressure sensor. The larger the pressure value, the greater the gas flow rate, and the smaller the pressure value, the smaller the gas flow rate. Since the pressure sensor and the drive motor are electrically connected, when the flow rate is detected to increase, the drive motor rotates forward to increase the cross-sectional area of ​​the gas channel. When the flow rate is detected to decrease, the drive motor rotates reversely to reduce the cross-sectional area of ​​the gas channel, thereby realizing automatic adjustment of the gas channel cross section; 3. A plurality of first atomizing nozzles are arranged upward, a plurality of second atomizing nozzles are arranged horizontally, a plurality of third atomizing nozzles are arranged downward, and the first atomizing nozzle and the second atomizing nozzle are arranged oppositely, and the second atomizing nozzle and the third atomizing nozzle are arranged oppositely, so that the gas can form an "S"-shaped path in the gas channel, thereby further improving the effect of gas-liquid mixing, thereby improving the effect of removing particulate matter in the gas, and when the regulating column moves, the spacing between the first atomizing nozzle group and the second atomizing nozzle group, and the spacing between the second atomizing nozzle group and the third atomizing nozzle group can be adjusted, so that the water curtain can adjust the water curtain density according to actual needs; 4. The laser particle size analyzer can capture and analyze the escaping particles and droplets in the outlet pipe, so as to adaptively adjust the size of the liquid atomization output by the first atomization nozzle, the second atomization nozzle and the third atomization nozzle according to the size and number of the particles and the mixed droplets, so as to maintain the optimal gas-liquid mixing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 yes Figure 1 A schematic diagram of a partial structural cross section; Figure 3 yes Figure 2 Schematic diagram of some structures; Figure 4 yes Figure 3 Explosion diagram of some structures; Figure 5 yes Figure 4 Another perspective of Figure 6 yes Figure 5 A schematic diagram of a partial structural cross section; Figure 7 yes Figure 5 Schematic diagram of some structures; Figure numerals: 1. Venturi tube; 11. Air inlet pipe; 12. Throat; 121. Liquid inlet; 122. Adjusting column; 13. Air outlet pipe; 2. Demisting pipe; 3. Flow equalizing assembly; 31. Turbofan; 32. Rotating ring; 33. Rotating bearing; 4. Adjusting mechanism; 41. Driving ring; 42. Driving column; 43. Limiting column; 44. Limiting plate; 45. Power assembly; 451. Turbine ring; 452. Worm; 453. Mounting shell; 454. Driving motor; 46. Driving slot; 47. Limiting slot; 5. Liquid outlet assembly; 51. First atomizing nozzle group; 52. Second atomizing nozzle group; 53. Third atomizing nozzle group; 54. Hose; 6. Centrifugal block; 61. Movable block; 62. Pressure sensor; 63. Spring; 7. Laser particle size analyzer. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-7 This application is described in further detail.

[0026] The present application embodiment discloses a gas emission treatment device for hydrochloric acid regeneration acid mist, referring to Figure 1-Figure 7A gas emission treatment device for hydrochloric acid regeneration acid mist comprises a venturi tube 1 and a demister tube 2, wherein the venturi tube 1 is arranged on the demister tube 2, the venturi tube 1 comprises an air inlet tube 11, a throat tube 12 and an air outlet tube 13, the air inlet tube 11 and the air outlet tube 13 are arranged in the same manner and are symmetrically welded and installed at both ends of the throat tube 12, the throat tube 12 is provided with a liquid inlet 121 for conveying absorption liquid into the throat tube 12, a flow equalizing component 3 is installed on the inner wall of the end of the throat tube 12 close to the air inlet tube 11, a plurality of groups of regulating columns 122 are movably installed inside the throat tube 12, the space enclosed by the plurality of groups of regulating columns 122 is a gas channel, an adjusting mechanism 4 is also installed on the throat tube 12, and a liquid outlet component 5 is installed on the adjusting column 122.

[0027] After the gas enters the air inlet pipe 11, the gas is first evenly flowed under the action of the flow equalizing component 3, so that the airflow is fully mixed and evenly enters the throat 12, and then the multiple groups of adjusting columns 122 are adjusted through the adjusting mechanism 4 to achieve a change in the cross-sectional area of ​​the gas channel. When the input flow rate of the gas changes, the change in the cross-sectional area of ​​the gas channel can adjust the flow rate of the gas in the gas channel, thereby maintaining the optimal gas flow rate for collision and mixing with the absorption liquid, thereby improving the effect of gas-liquid mixing. The liquid outlet component 5 on the adjusting column 122 can further make the absorption liquid and the gas fully contact, thereby improving the effect of removing particulate matter in the gas.

[0028] When the gas composition entering the throat 12 is uneven, it may cause the gas-liquid mixing effect to be relatively general. Therefore, it is necessary to fully mix the gas entering the throat 12. Therefore, the flow equalizing component 3 in this embodiment includes a turbofan 31, a rotating ring 32 and a rotating bearing 33. The turbofan 31 is fixedly installed in the rotating ring 32 and is welded and fixedly connected to the rotating ring 32. An installation groove is opened on the inner wall of the throat 12, and the rotating bearing 33 is installed in the installation groove. The outer ring of the rotating bearing 33 is fixedly welded and installed on the bottom wall of the installation groove. The rotating ring 32 is installed in the rotating bearing 33, and the outer wall of the rotating ring 32 is welded and fixedly connected to the inner ring of the rotating bearing 33. The diameter of the turbofan 31 is set to the same as the inner diameter of the throat 12.

[0029] When the airflow passes through the turbofan 31, it will drive the turbofan 31 to rotate, and the turbofan 31 will drive the rotating ring 32 to rotate in the installation groove. When the turbofan 31 rotates, it can disturb the airflow passing through the turbofan 31, so that the airflow can be fully mixed and evenly enter the throat 12. The rotating bearing 33 can reduce the friction force on the rotating ring 32 when it rotates, thereby increasing the service life of the turbofan 31 and reducing the loss of gas kinetic energy.

[0030] In order to adjust the cross-sectional area of ​​the gas passage by means of the multiple groups of adjusting columns 122, the adjusting mechanism 4 in the present embodiment includes a driving ring 41, a driving column 42, a limiting column 43, a limiting disk 44 and a power assembly 45. The driving ring 41 is installed between the turbofan 31 and the adjusting column 122, and is rotatably installed on the inner wall of the throat 12. The driving columns 42 and the limiting columns 43 are provided with multiple groups corresponding to the multiple groups of adjusting columns 122. The ends of the multiple groups of adjusting columns 122 close to the turbofan 31 are all provided with driving grooves 46. The multiple groups of driving columns 42 are all integrally arranged on the side of the driving ring 41 away from the turbofan 31. The multiple groups of driving columns 42 are away from the turbofan 31. One end of each of the plurality of limit plates 44 is slidably mounted in a plurality of drive grooves 46, a limit plate 44 is mounted on an end of the adjusting column 122 away from the turbofan 31, a plurality of limit grooves 47 are provided on a surface of the limit plate 44 close to the adjusting column 122 corresponding to the plurality of limit grooves 47 of the plurality of adjustment columns 122, a plurality of limit columns 43 are respectively integrally arranged at an end of the plurality of adjustment columns 122 away from the turbofan 31, a plurality of limit columns 43 are respectively slidably mounted in a plurality of limit grooves 47 at one end away from the turbofan 31, the projections of the drive grooves 46 and the limit grooves 47 on the horizontal plane are staggered with each other, a power assembly 45 is arranged on the drive ring 41 and the throat 12, and is used to rotate the drive ring 41.

[0031] The power assembly 45 can drive the driving ring 41 to rotate. When the driving ring 41 rotates, it can drive the driving column 42 to move in the driving groove 46. Since the projections of the driving groove 46 and the limiting groove 47 on the horizontal plane are staggered with each other, the limiting column 43 slides in the limiting groove 47, so the movement of the adjusting column 122 can be realized, thereby adjusting the cross-sectional size of the gas channel. When the flow rate of the gas input slows down, the cross-sectional area of ​​the gas channel is reduced, thereby increasing the flow rate of the gas in the throat 12. When the flow rate of the gas input speeds up, the cross-sectional area of ​​the gas channel is increased, thereby reducing the flow rate of the gas in the throat 12, thereby adjusting the gas flow rate in the throat 12, thereby maintaining the optimal gas flow rate for collision and mixing with the absorption liquid, and improving the effect of gas-liquid mixing. In addition, when the adjusting column 122 moves, it can also automatically scrape off some dirt attached to the contact surface between the adjusting column 122 and the gas, thereby reducing the impact of dirt accumulated after long-term use on the gas channel.

[0032] The power assembly 45 in this embodiment includes a turbine ring 451, a worm 452, a mounting shell 453 and a driving motor 454. The mounting shell 453 is fixedly welded and mounted on the outer wall of the throat 12. The turbine ring 451 is sleeved and welded on the driving ring 41. The worm 452 is rotatably mounted in the mounting shell 453. The worm 452 and the turbine ring 451 penetrate the side wall of the throat 12 and are threadedly connected. The driving motor 454 is bolted and fixedly mounted on the mounting shell 453, and the output shaft of the driving motor 454 is fixedly connected to one end of the worm 452. When the driving motor 454 mounted on the mounting shell 453 is started, the driving motor 454 can drive the worm 452 on the output shaft to rotate. When the worm 452 rotates, the turbine ring 451 can be driven to rotate. Since the turbine ring 451 is sleeved on the driving ring 41, the driving motor 454 can drive the driving ring 41 to rotate, thereby moving the adjusting column 122 to change the cross-sectional area of ​​the gas channel.

[0033] In this embodiment, multiple groups of centrifugal blocks 6 are evenly spaced and integrally arranged on the side wall of the rotating ring 32. A centrifugal chamber is provided in the centrifugal block 6. A movable block 61 and a pressure sensor 62 are movably installed in the centrifugal chamber. The movable block 61 is installed between the pressure sensor 62 and the turbofan 31. 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 can move away from the turbofan 31, thereby compressing the spring 63, thereby changing the pressure value detected by the pressure sensor 62. The larger the pressure value, the greater the gas flow rate, and the smaller the pressure value, the smaller the gas flow rate. Since the pressure sensor 62 is electrically connected to the drive motor 454, when the flow rate is detected to increase, the drive motor 454 rotates forward to increase the cross-sectional area of ​​the gas channel. When the flow rate is detected to decrease, the drive motor 454 rotates reversely to reduce the cross-sectional area of ​​the gas channel, thereby realizing automatic adjustment of the gas channel cross section.

[0034] In order to further improve the effect of gas-liquid mixing, the liquid outlet component 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. A liquid supply channel for conveying absorption liquid to the first atomizing nozzle group 51, the second atomizing nozzle group 52 and the third atomizing group nozzles is opened in the adjusting column 122. 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. A first atomizing nozzle group 51, a second atomizing nozzle group 52 and a third atomizing nozzle group 53 are provided and layered in height, which can effectively improve the effect of gas-liquid mixing contact. The hose 54 can achieve effective connection between the liquid inlet 121 and the liquid supply channel when the adjusting column 122 moves.

[0035] In this embodiment, the first atomizing nozzle group 51 includes a plurality of first atomizing nozzles, which are respectively arranged on several adjacent adjusting columns 122, the second atomizing nozzle group 52 includes a plurality of second atomizing nozzles, which are respectively arranged on several adjacent adjusting columns 122 and arranged opposite to the plurality of first atomizing nozzles, the third atomizing nozzle group 53 includes a plurality of third atomizing nozzles, which are respectively arranged on several adjacent adjusting columns 122 and arranged opposite to the plurality of second atomizing nozzles, the first atomizing nozzles are arranged upward, the second atomizing nozzles are arranged horizontally, and the third atomizing nozzles are arranged downward. The plurality of first atomizing nozzles are arranged upward, the plurality of second atomizing nozzles are arranged horizontally, the plurality of third atomizing nozzles are arranged downward, and the first atomizing nozzles and the second atomizing nozzles are arranged oppositely, and the second atomizing nozzles and the third atomizing nozzles are arranged oppositely, so that the gas can form an "S"-shaped path in the gas channel, thereby further improving the effect of gas-liquid mixing, thereby improving the effect of removing particulate matter in the gas.

[0036] In this embodiment, a laser particle size analyzer 7 is installed on the inner wall of the gas outlet pipe 13. The laser particle size analyzer 7 can capture and analyze the escaped particles and droplets in the gas outlet pipe 13, so as to adaptively adjust the size of the liquid atomization output by the first atomization nozzle, the second atomization nozzle and the third atomization nozzle according to the size and quantity of the particles and the mixed droplets, so as to maintain the best gas-liquid mixing efficiency.

[0037] The implementation principle of a gas emission treatment device for hydrochloric acid regeneration acid mist in the embodiment of the present application is: When the airflow passes through the turbofan 31, it will drive the turbofan 31 to rotate, and the turbofan 31 will drive the rotating ring 32 to rotate in the installation groove. When the turbofan 31 rotates, it can disturb the airflow passing through the turbofan 31, so that the airflow is fully mixed and evenly enters the throat 12. When the rotating ring 32 rotates, it can move the movable block 61 away from the turbofan 31, thereby compressing the spring 63, so as to change the pressure value detected by the pressure sensor 62. The larger the pressure value, the greater the gas flow rate, and the smaller the pressure value, the smaller the gas flow rate. Since the pressure sensor 62 is electrically connected to the drive motor 454, when the flow rate increases, the drive The motor 454 rotates forward, and the drive motor 454 can drive the worm 452 on the output shaft to rotate. When the worm 452 rotates, the turbine ring 451 can be driven 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. When the drive ring 41 rotates, the drive column 42 can be driven to move in the drive groove 46. Since the projections of the drive groove 46 and the limit groove 47 on the horizontal plane are staggered, the limit column 43 slides in the limit groove 47, so the adjustment column 122 can be moved, thereby increasing the cross-sectional size of the gas channel, thereby reducing the flow rate of the gas in the throat 12. On the contrary, when the flow rate of the gas input slows down, the cross-sectional area of ​​the gas channel is reduced, thereby increasing the flow rate of the gas in the throat 12, thereby maintaining the optimal gas flow rate for collision and mixing with the absorption liquid, and improving the effect of gas-liquid mixing.

[0038] This embodiment also discloses a gas emission treatment process for hydrochloric acid regeneration acid mist, comprising the following steps: S1: For the tail gas generated by the roasting furnace, it is first cooled by a concentrator and some Fe2O3 particles are removed; S2: For the tail gas obtained in step S1, most of the HCl is removed through an absorption tower to obtain a regenerated acid; S3: The tail gas obtained in step S2 is introduced into a waste acid washing tower, and waste acid is introduced for spraying to remove some Fe2O3 particles; the waste acid liquid obtained simultaneously enters the concentrator of step S1 for concentration and heating, and then is introduced into a roasting furnace for roasting; S4: The tail gas obtained in step S3 is introduced into a venturi scrubber, and the Fe2O3 particles in the tail gas are adsorbed by the liquid in the venturi scrubber and separated from the steam and water; the liquid discharged from the venturi scrubber enters the absorption tower in step S2 for spraying; S5: The tail gas obtained in step S4 is introduced into a quenching tower for cooling; part of the condensate generated in the quenching tower is simultaneously introduced into a venturi scrubber as an adsorption liquid for Fe2O3 particles in the tail gas; S6: The tail gas obtained in step S5 is introduced into a desalted water scrubber, and desalted water is simultaneously introduced for spraying to remove part of the Fe2O3 particles and HCl. The desalted water produced by the spraying is simultaneously introduced into a venturi scrubber as an adsorption liquid for Fe2O3 particles in the tail gas; S7: The tail gas obtained in step S6 is introduced into a wet electrostatic precipitator to further remove Fe2O3 particles, and the tail gas finally obtained is discharged through a chimney.

[0039] Further preferably, in step S7, the HCl concentration of the exhaust gas entering the wet electrostatic precipitator is lower than 10 mg / Nm³, the Fe2O3 concentration is between 10 mg / Nm³ and 20 mg / Nm³, and the temperature is lower than 50°C; the Fe2O3 and HCl concentrations of the exhaust gas discharged from the wet electrostatic precipitator are both lower than 10 mg / Nm³.

[0040] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate the existence of at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The above are all optional embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A gas emission treatment device for hydrochloric acid regeneration acid mist, comprising a venturi tube (1) and a demister tube (2), characterized in that: The venturi tube (1) is arranged on the demisting tube (2), and the venturi tube (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 in the same manner and are symmetrically arranged at the two ends of the throat pipe (12). The throat pipe (12) is provided with a liquid inlet (121) for conveying absorption liquid into the throat pipe (12). The inner end of the throat pipe (12) close to the air inlet pipe (11) is provided with a liquid inlet (121) for conveying absorption liquid into the throat pipe (12). A flow equalizing component (3) for equalizing the flow of gas is arranged on the wall; a plurality of groups of adjusting columns (122) are arranged inside the throat (12); the space enclosed by the plurality of groups of adjusting columns (122) is a gas channel; an adjusting mechanism (4) for adjusting the plurality of groups of adjusting columns (122) to change the cross-sectional size of the gas channel is also arranged on the throat (12); and a liquid outlet component (5) for allowing absorption liquid and gas to fully contact is arranged on the adjusting columns (122).

2. The gas emission treatment device for hydrochloric acid regeneration acid mist according to claim 1, characterized in that: The flow balancing component (3) comprises a turbofan (31), a rotating ring (32) and a rotating bearing (33); the turbofan (31) is arranged in the rotating ring (32) and is fixedly connected to the rotating ring (32); a mounting groove is provided on the inner wall of the throat (12); the rotating bearing (33) is arranged in the mounting groove; the outer ring of the rotating bearing (33) is fixedly arranged on the bottom wall of the mounting groove; the rotating ring (32) is arranged in the rotating bearing (33); 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 turbofan (31) is set to be the same as the inner diameter of the throat (12).

3. The gas emission treatment device for hydrochloric acid regeneration acid mist according to claim 2, characterized in that: The regulating mechanism (4) comprises a driving ring (41), a driving column (42), a limiting column (43), a limiting plate (44) and a power assembly (45); the driving ring (41) is arranged between the turbofan (31) and the regulating column (122), and is rotatably arranged on the inner wall of the throat (12); a plurality of driving columns (42) and the limiting columns (43) are arranged corresponding to a plurality of groups of regulating columns (122); a driving groove (46) is provided on the end of the plurality of groups of regulating columns (122) close to the turbofan (31); the plurality of groups of driving columns (42) are arranged on a side of the driving ring (41) away from the turbofan (31); and the ends of the plurality of groups of driving columns (42) away from the turbofan (31) are respectively slidably arranged on the plurality of groups of driving grooves (46). 6), the limit plate (44) is arranged at one end of the adjusting column (122) away from the turbofan (31), and a plurality of groups of limit grooves (47) are provided on a surface of the limit plate (44) close to the adjusting column (122) corresponding to the plurality of groups of adjusting columns (122), and the plurality of groups of limit columns (43) are respectively arranged at one end of the plurality of groups of adjusting columns (122) away from the turbofan (31), and the ends of the plurality of groups of limit columns (43) away from the turbofan (31) are respectively arranged in the plurality of groups of limit grooves (47), and the projections of the driving grooves (46) and the limit grooves (47) on the horizontal plane are arranged in an interlaced manner, and the power assembly (45) is arranged on the driving ring (41) and the throat (12) for rotating the driving ring (41).

4. The gas emission treatment device for hydrochloric acid regeneration acid mist according to claim 3 is characterized in that: 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 (12); the turbine ring (451) is sleeved on the driving ring (41); the worm (452) is rotatably arranged in the mounting shell (453); the worm (452) and the turbine ring (451) penetrate the side wall of the throat (12) and are threadedly connected; the driving motor (454) is arranged on the mounting shell (453); and the output shaft of the driving motor (454) is fixedly connected to one end of the worm (452).

5. The gas emission treatment device for hydrochloric acid regeneration acid mist according to claim 4, characterized in that: A plurality of groups of centrifugal blocks (6) are evenly spaced apart on the side wall of the rotating ring (32); a centrifugal chamber is provided in the centrifugal block (6); a movable block (61) and a pressure sensor (62) are provided in the centrifugal chamber; the movable block (61) is provided between the pressure sensor (62) and the turbofan (31); a spring (63) is provided between the movable block (61) and the pressure sensor (62); and the pressure sensor (62) is electrically connected to the drive motor (454).

6. The gas emission treatment device for hydrochloric acid regeneration acid mist according to claim 2, characterized in that: 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; a liquid supply channel for conveying absorption liquid to the first atomizing nozzle group (51), the second atomizing nozzle group (52) and the third atomizing nozzle group nozzles is provided in the adjusting column (122); 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 a side of the first atomizing nozzle group (51) away from the turbofan (31); and the third atomizing nozzle group (53) is located on a side of the second atomizing nozzle group (52) away from the first atomizing nozzle group (51).

7. The gas emission treatment device for hydrochloric acid regeneration acid mist according to claim 6, characterized in that: The first atomizing nozzle group (51) includes a plurality of first atomizing nozzles, and the plurality of first atomizing nozzles are respectively arranged on several adjacent adjusting columns (122); the second atomizing nozzle group (52) includes a plurality of second atomizing nozzles, and the plurality of second atomizing nozzles are respectively arranged on several adjacent adjusting columns (122) and are arranged opposite to the plurality of groups of the first atomizing nozzles; the third atomizing nozzle group (53) includes a plurality of third atomizing nozzles, and the plurality of third atomizing nozzles are respectively arranged on several adjacent adjusting columns (122) and are arranged opposite to the plurality of groups of the second atomizing nozzles; the first atomizing nozzles are arranged upward, the second atomizing nozzles are arranged horizontally, and the third atomizing nozzles are arranged downward.

8. The gas emission treatment device for hydrochloric acid regeneration acid mist according to claim 1, characterized in that: A laser particle size analyzer (7) for capturing the gas-liquid mixing state is arranged on the inner wall of the gas outlet pipe (13).

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