Calcium dobesilate production waste gas treatment equipment and treatment process

Abstract

The invention discloses calcium dobesilate production waste gas treatment equipment and a treatment process, and relates to the technical field of waste gas treatment.The calcium dobesilate production waste gas treatment equipment comprises a tower body, a first waste gas treatment device and a second waste gas treatment device, the second waste gas treatment device comprises an inner cylinder and an outer cylinder which are coaxially arranged, the outer cylinder is hollow, and the bottom of the outer cylinder is closed and wraps the bottom of the inner cylinder; inner spaces of the outer cylinder and the inner cylinder are used for containing activated carbon; a lifting mechanism is arranged in the inner cylinder and used for driving the activated carbon to continuously ascend in the inner cylinder, a guide crushing mechanism is arranged at the top of the outer cylinder and used for guiding the activated carbon in the inner cylinder to enter the outer cylinder from the top end of the outer cylinder so that the activated carbon can do reciprocating circulating motion between the outer cylinder and the inner cylinder, and the guide crushing mechanism is further used for crushing the activated carbon; and a cleaning mechanism is arranged below the outer cylinder and is used for blowing and cleaning the surface of the passing activated carbon. The method has the effect of improving the adsorption efficiency of the activated carbon.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas treatment, and in particular to a waste gas treatment device and treatment process for calcium dobesilate production. Background Art

[0002] Calcium dobesilate is a drug commonly used to treat microvascular diseases, especially playing an important role in improving microcirculation and reducing vascular permeability. It is mainly used clinically for some diseases caused by venous and microcirculatory disorders, such as microvascular complications caused by diabetes, hemorrhoids, varicose veins, etc.

[0003] Calcium dobesilate undergoes synthesis, neutralization and other reactions during the production process, which will produce waste gas that is harmful to the environment. For example, acidic gases such as sulfur dioxide will be produced during the synthesis reaction. At this time, the adsorption method can be used to remove sulfur dioxide from the waste gas. The adsorption method is to pass the waste gas into a tower or other closed container filled with an adsorbent (such as activated carbon), and use the adsorption characteristics of activated carbon to remove sulfur dioxide from the waste gas to achieve the purpose of waste gas purification.

[0004] When the adsorption method is conventionally used to remove sulfur dioxide, the position of the activated carbon used as an adsorbent is fixed, which means that only the activated carbon that is always located on the outer layer plays the main adsorption role, while the part of the activated carbon located inside that plays the adsorption role is very small. This not only makes the activated carbon unable to be fully utilized, but may also cause incomplete exhaust gas treatment over a long period of time. Summary of the invention

[0005] In order to improve the situation that activated carbon cannot be fully utilized and exhaust gas treatment is not thorough enough when working for a long time, the present application provides a waste gas treatment equipment and treatment process for calcium dobesilate production.

[0006] On the one hand, the present application provides a calcium dobesilate production waste gas treatment device, which adopts the following technical solution: A waste gas treatment device for producing calcium dobesilate, comprising: The tower body is placed vertically and is hollow inside, the side wall of the tower body is provided with an air inlet, and the top is provided with an air outlet; The first exhaust gas treatment device is arranged inside the tower body and is used to spray an alkaline solution on the exhaust gas; a second exhaust gas treatment device, located above the first exhaust gas treatment device; The second exhaust gas treatment device comprises an inner cylinder and an outer cylinder arranged coaxially, the outer cylinder is hollow, and the inner diameter of the outer cylinder is larger than the outer diameter of the inner cylinder, the top of the outer cylinder is provided with an opening, and the bottom is closed and wraps the bottom of the inner cylinder, the top and bottom of the inner cylinder are both provided with openings, and the internal spaces of the outer cylinder and the inner cylinder are used to hold activated carbon; The inner cylinder is provided with a lifting mechanism for driving the activated carbon to continuously rise inside the inner cylinder, and the top of the outer cylinder is provided with a guide crushing mechanism for guiding the activated carbon in the inner cylinder from the top of the outer cylinder into the outer cylinder, so that the activated carbon reciprocates between the outer cylinder and the inner cylinder, and the guide crushing mechanism is also used to crush the activated carbon; A cleaning mechanism is provided below the outer cylinder for blowing and cleaning the surface of the activated carbon passing through.

[0007] Optionally, the lifting mechanism includes a rotating rod and a spiral conveying blade, the spiral conveying blade is spirally wound on the outer wall of the rotating rod, and the edge of the spiral conveying blade is in close contact with the inner wall of the inner cylinder, the rotating rod is coaxially arranged with the inner cylinder, the rotating rod passes downward through the inner cylinder, and is rotatably connected to the outer cylinder, and the spiral blade extends downward into the outer cylinder.

[0008] Optionally, the guide crushing mechanism includes a guide block, which covers the top of the inner cylinder and leaves a gap with the top of the inner cylinder for activated carbon to pass through. The rotating rod is passed through the guide block and fixed to the guide block. The bottom surface of the guide block is provided with a guide arc surface. The distance between the guide arc surface and the outer wall of the inner cylinder gradually increases from top to bottom, and the guide arc surface gradually bends and extends downward toward the outer cylinder. The side wall of the guide block is in contact with the inner wall of the outer cylinder. The guide arc surface is provided with a plurality of paddles extending along the radial direction of the outer cylinder, and the paddles all protrude downward.

[0009] Optionally, the guide crushing mechanism also includes a crushing roller, the outer wall of which is provided with a plurality of crushing spikes, the crushing roller is provided with multiple and spaced apart around the inner tube, the crushing roller vertically rotates at the bottom of the guide block away from the edge of the inner tube, the side wall of the crushing roller close to the inner tube extends out of the guide block, and a space is left between the inner tube for the activated carbon to pass through.

[0010] Optionally, the upper and lower ends of the crushing roller are rotatably connected to sliders, the sliders are horizontally slidably connected to the guide block, there is a return member between the slider and the inner wall of the guide block, the return member is placed horizontally, one end of the return member is connected to the side wall of the slider, and the other end is connected to the inner wall of the guide block.

[0011] Optionally, a closed cylinder is provided outside the outer cylinder, and the closed cylinder is coaxially sleeved on the lower part of the outer cylinder. A closed ring is provided on the top of the closed cylinder, and the closed ring is coaxially sleeved on the outside of the outer cylinder. The outer wall of the closed ring is sealedly connected to the inner wall of the tower body, and the inner wall of the closed ring is sealedly connected to the outer wall of the outer cylinder. An air guide groove is opened on the side wall of the closed cylinder, and the air guide groove connects the inner and outer spaces of the closed cylinder.

[0012] Optionally, the cleaning mechanism includes an annular air duct, which is located at the bottom of the closed cylinder and is coaxially arranged with the closed cylinder. The diameter of the annular air duct is larger than the diameter of the outer cylinder and is used for external air supply equipment. A plurality of air outlet pipes are arranged at intervals on the annular air duct, and the air outlets of the air outlet pipes are all inclined toward the bottom surface of the outer cylinder.

[0013] Optionally, an external coaxial sleeve near the bottom end of the outer cylinder is provided with a fixing ring, and the fixing ring is fixedly connected to the rotating rod through a connecting rod, and a knocking plate is hinged on the bottom surface of the fixing ring, and the rotation axis of the knocking plate is perpendicular to the axial direction of the fixing ring, and a knocking block is provided on the inner side wall of the bottom end of the knocking plate, and the air outlet pipe faces the surface of the knocking plate away from the knocking block.

[0014] Optionally, the first exhaust gas treatment mechanism includes a nozzle and a connecting shaft, the nozzle is hemispherical with the arc surface facing downward, the connecting shaft is vertically penetrated through the bottom of the tower body, the top of the connecting shaft is fixed to the nozzle, the connecting shaft is rotatably connected to the tower body, the interior of the connecting shaft is hollow, the top of the connecting shaft is connected to the nozzle, and the bottom is used for an external liquid supply device, and the air inlet is located below the nozzle.

[0015] On the other hand, the present application also provides a process for treating waste gas from the production of calcium dobesilate, which uses the above-mentioned waste gas treatment equipment from the production of calcium dobesilate to treat the production waste gas, comprising the following steps: S1: First, pre-cool the exhaust gas, then start the first exhaust gas treatment device and the second exhaust gas treatment device, fill the outer cylinder and the inner cylinder with activated carbon, and pass the exhaust gas into the tower through the air inlet; S2: The nozzle rotates and sprays alkaline solution to neutralize the exhaust gas and reduce the sulfur dioxide content in the exhaust gas. The treated exhaust gas then goes upward into the outer cylinder, where the reciprocating activated carbon adsorbs the exhaust gas and adsorbs the remaining impurities in the exhaust gas. Finally, the exhaust gas is discharged through the outlet. S3: During the exhaust gas treatment process, the cleaning mechanism intermittently cleans the activated carbon inside the outer cylinder to extend the service life of the activated carbon.

[0016] In summary, the present application includes at least one of the following beneficial effects: 1. By adopting the coaxial arrangement of the outer cylinder and the inner cylinder, the activated carbon can gradually rise inside the inner cylinder under the lifting action of the spiral conveying blades. After the activated carbon rises to the top of the inner cylinder, it falls into the outer cylinder under the guidance of the guide arc surface. Then the activated carbon gradually falls under its own gravity and gathers at the bottom of the outer cylinder. Finally, it is transported to the inner cylinder again by the spiral conveying blades to form a complete cycle. The activated carbon can continuously turn itself over during the reciprocating cycle, so that the surface of each piece of activated carbon can be evenly adsorbed, and the activated carbon can be continuously turned over by the rotating paddle during the cycle, so that the activated carbon in the inner cylinder can be evenly adsorbed. The activated carbon in the inner layer can move to the outer layer during the circulation process, allowing the activated carbon in the inner and outer layers to exchange positions, which is more conducive to full adsorption. Finally, in the process of the activated carbon moving from the inner cylinder to the outer cylinder, the crushing roller continuously breaks the large pieces of activated carbon into smaller pieces, which is conducive to increasing the surface area of ​​the activated carbon for adsorption, making the adsorption of exhaust gas more sufficient. In addition, since the broken activated carbon moves from top to bottom, after the broken activated carbon, it is conducive to the smaller activated carbon falling into the gaps between the larger activated carbons, thereby filling these gaps and improving the effect of exhaust gas adsorption; 2. By arranging a cleaning mechanism under the bottom of the outer cylinder, the air outlet pipe arranged around the outer cylinder can intermittently purge the bottom of the outer cylinder, which is beneficial to cleaning the surface of the activated carbon located at the bottom of the outer cylinder. Since the activated carbon continuously circulates between the outer cylinder and the inner cylinder, all the activated carbon can be cleaned when it moves to the bottom of the outer cylinder, which can improve the service life of the activated carbon and reduce the replacement frequency of the activated carbon. The knocking plate rotates with the fixed ring. When the knocking plate rotates to the air outlet position facing the air outlet pipe, the knocking plate is blown by the air flow from the air outlet pipe, so that the knocking plate drives the knocking block to hammer the surface of the outer cylinder. After the outer cylinder is hammered, it vibrates, which is beneficial to shake off the impurities adsorbed on the surface of the activated carbon. When the outer cylinder vibrates, it is more conducive to the smaller activated carbon falling into the gap between the larger activated carbons. 3. By adopting the dual purification mode of spraying treatment and activated carbon adsorption treatment, the nozzle rotates to spray the alkaline solution, so that the alkaline solution can form an annular water mist around the nozzle. The exhaust gas will pass through the annular water mist during the gradual rise, so that the alkaline solution can fully react with the sulfur dioxide gas in the exhaust gas, thereby reducing the sulfur dioxide content in the exhaust gas. Then the exhaust gas continues to rise to the inside of the outer cylinder and the inner cylinder, and is further adsorbed by the activated carbon. The activated carbon keeps reciprocating and circulating, and can fully contact with the exhaust gas, making the adsorption of sulfur dioxide more sufficient, further removing sulfur dioxide in the exhaust gas, and achieving the purpose of purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram showing the structure of the entire tower body in Example 1 of the present application; Figure 2This is a schematic diagram showing the structure of the interior of the tower body in Example 1 of the present application; Figure 3 It is a partial cross-sectional schematic diagram showing the structure of the outer cylinder and the inner cylinder in Example 1 of the present application; Figure 4 yes Figure 3 An enlarged schematic diagram at A; Figure 5 is a schematic diagram showing the structure of the interior of the closed cylinder in Example 1 of the present application; Figure 6 This is a schematic diagram showing the structure of the guide block in Example 1 of the present application.

[0018] Explanation of the reference numerals: 1. tower body; 11. supporting leg; 12. air inlet; 13. air outlet; 14. water outlet; 15. second driving member; 2. nozzle; 21. connecting shaft; 22. first driving member; 3. inner cylinder; 31. rotating rod; 32. spiral conveying blade; 4. outer cylinder; 41. closing cylinder; 42. air guide groove; 43. closing ring; 5. guide block; 51. guide arc surface; 52. paddle; 53. accommodating box; 54. crushing roller; 55. slider; 56. return member; 6. annular air duct; 61. air outlet duct; 7. fixing ring; 71. knocking plate; 72. knocking block; 73. connecting rod. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-6 This application is described in further detail. Example 1

[0020] Example 1 of the present application discloses a waste gas treatment device for the production of calcium dobesilate, referring to Figure 1 and Figure 2 The waste gas treatment equipment for the production of calcium dobesilate includes a vertically placed tower body 1, the interior of the tower body 1 is hollow, and a first waste gas treatment device and a second waste gas treatment device are arranged in the tower body 1, which are used to absorb and treat sulfur dioxide gas in the waste gas. The tower body 1 is a truncated cone with a narrow top and a wide bottom. Four legs 11 are fixed to the bottom of the tower body 1, so that the tower body 1 can be stably placed on the ground through the legs 11. The side wall of the tower body 1 is connected with an air inlet 12, and the waste gas can be passed into the interior of the tower body 1 through the air inlet 12. The top of the tower body 1 is connected with an air outlet 13, and the purified waste gas is discharged from the tower body 1 through the air outlet 13 at the top.

[0021] The first exhaust gas treatment device includes a nozzle 2, and a connecting shaft 21 is arranged at the bottom of the nozzle 2. The connecting shaft 21 is arranged coaxially with the tower body 1, and the connecting shaft 21 is inserted into the tower body 1 from the bottom of the tower body 1, and the connecting shaft 21 rotates and is sealed and connected to the bottom wall of the tower body 1. The nozzle 2 has a hemispherical appearance, and the hemispherical arc surface of the nozzle 2 faces downward. A plurality of water outlet holes are opened on the hemispherical arc surface of the nozzle 2. The top of the connecting shaft 21 is fixedly connected to the nozzle 2, so that the nozzle 2 and the connecting shaft 21 can rotate synchronously.

[0022] The interior of the connecting shaft 21 is hollow, and the interior space of the connecting shaft 21 is connected to the interior space of the nozzle 2. The bottom of the connecting shaft 21 can be externally connected to a liquid supply device such as a water pump, so that the alkaline solution can enter the nozzle 2 through the connecting shaft 21, and finally spray out from the water outlet of the nozzle 2 to form a water mist. The opening of the air inlet 12 inside the tower body 1 is located below the nozzle 2, so that the exhaust gas can react with the water mist sprayed by the nozzle 2 after entering the tower body 1. A first driving member 22 is fixed at the bottom of the tower body 1. The first driving member 22 can be a small servo motor. The output shaft of the first driving member 22 is coaxially fixed with the bottom end of the connecting shaft 21, so that the first driving member 22 can drive the nozzle 2 to rotate through the connecting shaft 21. The output shaft of the first driving member 22 can be connected to the connecting shaft 21 through a rotary joint, so that the connecting shaft 21 can transport the alkaline solution while rotating.

[0023] The nozzle 2 sprays the alkaline solution during the rotation process, so that the alkaline solution can form an annular water mist around the nozzle 2, and the annular water mist can form a water mist layer inside the tower body 1 to cover the exhaust gas. The exhaust gas will pass through the annular water mist during the gradual rise, so that the alkaline solution can fully react with the sulfur dioxide gas in the exhaust gas, thereby reducing the sulfur dioxide content in the exhaust gas. The side wall of the tower body 1 near the bottom is also connected to a water outlet 14, and the wastewater after purifying the exhaust gas can be discharged from the tower body 1 through the water outlet 14.

[0024] Further, see Figures 2 to 5 The second exhaust gas treatment device is located above the nozzle 2, and includes an inner cylinder 3 and an outer cylinder 4 which are coaxially arranged, wherein the outer cylinder 4 is hollow. Specifically, the outer cylinder 4 may be a hollow mesh structure or may have a plurality of through holes on the outer wall, so that the exhaust gas may enter the outer cylinder 4 through the through holes. The inner diameter of the outer cylinder 4 is larger than the outer diameter of the inner cylinder 3, so that there is space between the outer cylinder 4 and the inner cylinder 3 for the activated carbon to pass through. The top of the outer cylinder 4 is provided with an opening, and the bottom is closed and wraps the bottom of the inner cylinder 3. The bottom of the outer cylinder 4 and the bottom of the inner cylinder 3 also have space. The top and bottom of the inner cylinder 3 are both provided with openings, and the side wall of the inner cylinder 3 is in a closed state. The inner spaces of the outer cylinder 4 and the inner cylinder 3 can both contain activated carbon.

[0025] A closed cylinder 41 is coaxially sleeved on the outside of the outer cylinder 4, and the closed cylinder 41 wraps the lower part of the outer cylinder 4, and the upper part of the outer cylinder 4 is exposed above the closed cylinder 41. The side wall of the closed cylinder 41 is spaced apart with a plurality of air guide grooves 42, which connect the inner and outer spaces of the closed cylinder 41, and the exhaust gas can enter the closed cylinder 41 from the bottom of the tower body 1 through the air guide grooves 42. A closed ring 43 is fixed to the top of the closed cylinder 41, and the closed ring 43 is coaxially sleeved on the outside of the outer cylinder 4, and the outer wall of the closed ring 43 is sealed and connected to the inner wall of the tower body 1, and the inner wall of the closed ring 43 is sealed and connected to the outer wall of the outer cylinder 4, so that the exhaust gas can only enter the closed cylinder 41 through the air guide grooves 42 for purification and adsorption before it can be discharged from the gas outlet 13.

[0026] In order to enable the activated carbon to reciprocate and circulate between the outer cylinder 4 and the inner cylinder 3, a rotating rod 31 and a spiral conveying blade 32 are arranged inside the inner cylinder 3, wherein the rotating rod 31 is coaxially arranged with the inner cylinder 3, the rotating rod 31 passes upwardly out of the tower body 1, and is rotatably connected with the tower body 1, and a second driving member 15 is fixed on the top of the tower body 1, and the second driving member 15 can be a small servo motor, and the output shaft of the second driving member 15 is coaxially fixed with the rotating rod 31, which can drive the rotating rod 31 to rotate. The bottom end of the rotating rod 31 is rotatably connected to the bottom of the outer cylinder 4, and the spiral conveying blade 32 is spirally wound on the outer wall of the rotating rod 31, and the edge of the spiral conveying blade 32 is in close contact with the inner wall of the inner cylinder 3, and the spiral blade extends downward into the outer cylinder 4. The height of the top of the outer cylinder 4 is higher than the height of the top of the inner cylinder 3, so that the activated carbon can fall into the outer cylinder 4, and the outer cylinder 4 and the inner cylinder 3 can be fixedly connected together by a connecting rod.

[0027] In order to guide the activated carbon in the inner cylinder 3 from the top of the outer cylinder 4 into the inner cylinder 4, a guide block 5 is provided at the top of the outer cylinder 4, and the rotating rod 31 passes through the guide block 5 and is fixedly connected to the guide block 5, so that the guide block 5 can rotate with the rotating rod 31. The guide block 5 covers the inner cylinder 3 and a gap is left between the guide block 5 and the top of the inner cylinder 3 for the activated carbon to pass through. The bottom surface of the guide block 5 is provided with a guide arc surface 51. The distance between the guide arc surface 51 and the outer wall of the inner cylinder 3 gradually increases from top to bottom, and the guide arc surface 51 gradually bends downward toward the outer cylinder 4. When the activated carbon moves to the top of the inner cylinder 3, it can move along the guide arc surface 51 to the inner cylinder 4. The side wall of the guide block 5 contacts the inner wall of the outer cylinder 4 to prevent the activated carbon from falling out of the outer cylinder 4.

[0028] Reference Figures 3 to 6 The guide block 5 is provided with four paddles 52 extending in the radial direction of the outer tube 4 on the guide arc surface 51. The paddles 52 all protrude downward. The paddles 52 can rotate with the guide block 5. The activated carbon can be continuously turned over by the rotating paddles 52 during circulation, so that the activated carbon in the inner layer can move to the outer layer during the circulation process, allowing the activated carbon in the inner and outer layers to exchange positions, which is more conducive to full adsorption.

[0029] The guide block 5 has four accommodating boxes 53 fixed at intervals at the bottom of the guide block 5 away from the edge of the inner tube 3. A crushing roller 54 is arranged in each accommodating box 53. A plurality of crushing spikes are fixed on the outer wall of each crushing roller 54. The crushing rollers 54 are distributed around the inner tube 3. The crushing rollers 54 are placed vertically, and the upper and lower ends are rotatably connected with sliders 55. The side wall of the crushing roller 54 close to the inner tube 3 extends out of the guide block 5, and there is a space between the inner tube 3 for the activated carbon to pass through. The distance between the side wall of the crushing roller 54 and the inner tube 3 can be set according to the needs. If the volume of the activated carbon is to be smaller after crushing, the distance between the side wall of the crushing roller 54 and the inner tube 3 is reduced; if the volume of the activated carbon is to be kept not too small after crushing, the distance between the side wall of the crushing roller 54 and the inner tube 3 is increased.

[0030] The sliders 55 are all horizontally slidably connected in the accommodating box 53. There is a restoring member 56 between the slider 55 and the inner wall of the guide block 5. The restoring member 56 can be a compression spring. The restoring member 56 is placed horizontally. One end of the restoring member 56 is fixedly connected to the side wall of the slider 55, and the other end is fixedly connected to the inner wall of the guide block 5. When the crushing roller 54 crushes the activated carbon, due to the large volume of the activated carbon in the initial state, the activated carbon moves between the crushing roller 54 and the inner cylinder 3, and the crushing roller 54 can be pressed into the accommodating box 53, and then it can be pushed out by the restoring force generated by the restoring member 56, so that the crushing roller 54 can reciprocate horizontally while rotating, which is more conducive to crushing the activated carbon.

[0031] In order to extend the service life of the activated carbon, the surface of the activated carbon is cleaned while the activated carbon circulates. An annular air duct 6 is fixed to the bottom of the closed cylinder 41. The annular air duct 6 is coaxially arranged with the closed cylinder 41. The diameter of the annular air duct 6 is larger than the diameter of the outer cylinder 4, so that the annular air duct 6 can surround the outer cylinder 4 from the bottom. The annular air duct 6 can be connected to an air supply device such as a hot air blower through a connecting pipe. A plurality of air outlet pipes 61 are arranged at intervals on the annular air duct 6, and the air outlets of the air outlet pipes 61 are all inclined toward the bottom surface of the outer cylinder 4. In Example 1 of the present application, in order to facilitate the purging of the activated carbon, the bottom end of the outer cylinder 4 is a downwardly convex arc surface, and the air outlet of the air outlet pipe 61 faces the arc surface at the bottom end of the outer cylinder 4, and the arc surface at the bottom of the outer cylinder 4 is more conducive to the activated carbon approaching the spiral conveying blade 32.

[0032] Furthermore, the outer coaxial sleeve near the bottom of the outer cylinder 4 is provided with a fixed ring 7, the inner wall of the fixed ring 7 is slidably connected to the outer wall of the outer cylinder 4, and the bottom surface of the fixed ring 7 is hinged with a knocking plate 71, the rotation axis of the knocking plate 71 is perpendicular to the axis direction of the fixed ring 7, and the knocking plate 71 can rotate in the direction close to or away from the bottom end of the outer cylinder 4. A knocking block 72 is fixed on the inner side wall of the bottom end of the knocking plate 71, and the knocking block 72 can be made of rubber material. The fixed ring 7 is fixedly connected to the bottom end of the rotating rod 31 through a connecting rod 73, and the connecting rod 73 is arranged in close contact with the bottom surface of the outer cylinder 4, so that the fixed ring 7 can rotate synchronously with the rotating rod 31 through the connecting rod 73.

[0033] The activated carbon can gradually rise inside the inner cylinder 3 under the lifting action of the spiral conveying blade 32. After the activated carbon rises to the top of the inner cylinder 3, it falls into the outer cylinder 4 under the guidance of the guide arc surface 51. Then the activated carbon gradually falls under its own gravity and gathers at the bottom of the outer cylinder 4. Finally, it is transported to the inner cylinder 3 again by the spiral conveying blade 32 to form a complete cycle. The activated carbon can continuously turn itself over during the reciprocating cycle, so that each piece of activated carbon can be evenly adsorbed. In the process of the activated carbon moving from the inner cylinder 3 to the outer cylinder 4, the crushing roller 54 rotates while following the synchronous rotation of the guide block 5, and continuously breaks the large pieces of activated carbon into smaller pieces, which is conducive to increasing the surface area of ​​the activated carbon for adsorption, making the adsorption of the exhaust gas more sufficient, and because the broken activated carbon moves from top to bottom, after the broken activated carbon is broken, it is conducive to the smaller activated carbon falling into the gaps between the larger activated carbons, thereby filling these gaps and improving the effect of exhaust gas adsorption.

[0034] The air outlet pipe 61 arranged around the outer tube 4 can intermittently purge the bottom of the outer tube 4, which is conducive to cleaning the surface of the activated carbon at the bottom of the outer tube 4. The impurities blown off fall into the closed tube 41. Since the activated carbon continuously circulates between the outer tube 4 and the inner tube 3, all activated carbon can be cleaned when it moves to the bottom of the outer tube 4, which can improve the service life of the activated carbon and reduce the replacement frequency of the activated carbon. The knocking plate 71 rotates with the fixed ring 7. When the knocking plate 71 rotates to the air outlet position facing the air outlet pipe 61, the knocking plate 71 is blown by the air flow from the air outlet pipe 61, so that the knocking plate 71 drives the knocking block 72 to hammer the surface of the outer tube 4. After the outer tube 4 is hammered, it vibrates, which is conducive to shaking off the impurities adsorbed on the surface of the activated carbon. When the outer tube 4 vibrates, it is more conducive to the smaller activated carbon falling into the gap between the larger activated carbon.

[0035] The implementation principle of the waste gas treatment equipment for calcium hydroxybenzenesulfonate production in Example 1 of the present application is as follows: the activated carbon gradually rises inside the inner cylinder 3 under the continuous conveying of the spiral conveying blades 32, and scatters into the outer cylinder 4, so that the activated carbon continuously reciprocates between the outer cylinder 4 and the inner cylinder 3, so that the surface of each activated carbon can be evenly adsorbed, and in the process of the activated carbon circulation, it is broken into smaller blocks by the crushing roller 54, which is beneficial to increase the surface area of ​​the activated carbon for adsorption, so that the adsorption of the waste gas is more sufficient, and the air outlet pipe 61 can blow the knocking plate 71 to drive the knocking block 72 to hammer the outer cylinder 4 while sweeping the surface of the activated carbon, which is beneficial to shake off the impurities adsorbed on the surface of the activated carbon, and at the same time, it is more conducive to the smaller activated carbon falling into the gap between the larger activated carbons. Example 2

[0036] Example 2 discloses a calcium dobesilate production waste gas treatment device and a treatment process, using the calcium dobesilate production waste gas treatment device as in Example 1 to treat the production waste gas, including the following steps: S1: first pre-cool the exhaust gas, then start the first exhaust gas treatment device and the second exhaust gas treatment device, add activated carbon to the outer tube 4 and the inner tube 3, and pass the exhaust gas into the tower body 1 through the air inlet 12; S2: the nozzle 2 rotates and sprays the alkaline solution to neutralize the exhaust gas and reduce the sulfur dioxide content in the exhaust gas. The treated exhaust gas then enters the outer tube 4 upward, and the reciprocating activated carbon adsorbs the exhaust gas and adsorbs the remaining impurities in the exhaust gas. Finally, the exhaust gas is discharged through the outlet 13. S3: During the exhaust gas treatment process, the air outlet pipe 61 intermittently blows and cleans the activated carbon inside the outer tube 4, and the knocking block 72 intermittently hammers the outer tube 4 to shake off impurities on the surface of the activated carbon to extend the service life of the activated carbon.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A calcium dobesilate production waste gas treatment device, characterized in that: include The tower body is placed vertically and is hollow inside, the side wall of the tower body is provided with an air inlet, and the top is provided with an air outlet; The first exhaust gas treatment device is arranged inside the tower body and is used to spray an alkaline solution on the exhaust gas; a second exhaust gas treatment device, located above the first exhaust gas treatment device; The second exhaust gas treatment device comprises an inner cylinder and an outer cylinder arranged coaxially, the outer cylinder is hollow, and the inner diameter of the outer cylinder is larger than the outer diameter of the inner cylinder, the top of the outer cylinder is provided with an opening, and the bottom is closed and wraps the bottom of the inner cylinder, the top and bottom of the inner cylinder are both provided with openings, and the internal spaces of the outer cylinder and the inner cylinder are used to hold activated carbon; The inner cylinder is provided with a lifting mechanism for driving the activated carbon to continuously rise inside the inner cylinder, and the top of the outer cylinder is provided with a guide crushing mechanism for guiding the activated carbon in the inner cylinder from the top of the outer cylinder into the outer cylinder, so that the activated carbon reciprocates between the outer cylinder and the inner cylinder, and the guide crushing mechanism is also used to crush the activated carbon; A cleaning mechanism is provided below the outer cylinder for blowing and cleaning the surface of the activated carbon passing through.

2. The calcium dobesilate production waste gas treatment equipment according to claim 1, characterized in that: The lifting mechanism includes a rotating rod and a spiral conveying blade, the spiral conveying blade is spirally wound on the outer wall of the rotating rod, and the edge of the spiral conveying blade is in close contact with the inner wall of the inner cylinder, the rotating rod is coaxially arranged with the inner cylinder, the rotating rod passes downward out of the inner cylinder, and is rotatably connected to the outer cylinder, and the spiral blade extends downward into the outer cylinder.

3. The calcium dobesilate production waste gas treatment equipment according to claim 2, characterized in that: The guide crushing mechanism includes a guide block, which covers the top of the inner cylinder and leaves a gap with the top of the inner cylinder for the activated carbon to pass through. The rotating rod is passed through the guide block and fixed to the guide block. The bottom surface of the guide block is provided with a guide arc surface. The distance between the guide arc surface and the outer wall of the inner cylinder gradually increases from top to bottom, and the guide arc surface gradually bends and extends downward toward the outer cylinder. The side wall of the guide block is in contact with the inner wall of the outer cylinder. The guide arc surface is provided with a plurality of paddles extending in the radial direction of the outer cylinder, and the paddles all protrude downward.

4. The calcium dobesilate production waste gas treatment equipment according to claim 3, characterized in that: The guide crushing mechanism also includes a crushing roller, the outer wall of which is provided with a plurality of crushing spikes, the crushing roller is provided with multiple and spaced apart around the inner tube, the crushing roller rotates vertically at the bottom of the guide block away from the edge of the inner tube, the side wall of the crushing roller close to the inner tube extends out of the guide block, and a space is left between the crushing roller and the inner tube for the activated carbon to pass through.

5. The calcium dobesilate production waste gas treatment equipment according to claim 4, characterized in that: The upper and lower ends of the crushing roller are rotatably connected with sliders, and the sliders are horizontally slidably connected in the guide block. There is a return member between the slider and the inner wall of the guide block. The return member is placed horizontally, and one end of the return member is connected to the side wall of the slider, and the other end is connected to the inner wall of the guide block.

6. The calcium dobesilate production waste gas treatment equipment according to claim 2, characterized in that: A closed cylinder is arranged outside the outer cylinder, and the closed cylinder is coaxially sleeved on the lower part of the outer cylinder. A closed ring is arranged on the top of the closed cylinder, and the closed ring is coaxially sleeved outside the outer cylinder. The outer wall of the closed ring is sealed with the inner wall of the tower body, and the inner wall of the closed ring is sealed with the outer wall of the outer cylinder. An air guide groove is opened on the side wall of the closed cylinder, and the air guide groove connects the inner and outer spaces of the closed cylinder.

7. The calcium dobesilate production waste gas treatment equipment according to claim 6, characterized in that: The cleaning mechanism includes an annular air duct, which is located at the bottom of the closed cylinder and is coaxially arranged with the closed cylinder. The diameter of the annular air duct is larger than the diameter of the outer cylinder and is used for external air supply equipment. A plurality of air outlet pipes are arranged at intervals on the annular air duct, and the air outlets of the air outlet pipes are all inclined toward the bottom surface of the outer cylinder.

8. The calcium dobesilate production waste gas treatment equipment according to claim 7, characterized in that: A fixing ring is provided on the outer coaxial sleeve near the bottom end of the outer cylinder, and the fixing ring is fixedly connected to the rotating rod through a connecting rod. A knocking plate is hinged on the bottom surface of the fixing ring, and the rotation axis of the knocking plate is perpendicular to the axial direction of the fixing ring. A knocking block is provided on the inner side wall of the bottom end of the knocking plate, and the air outlet pipe faces the surface of the knocking plate away from the knocking block.

9. The calcium dobesilate production waste gas treatment equipment according to claim 1, characterized in that: The first exhaust gas treatment mechanism includes a nozzle and a connecting shaft. The nozzle is hemispherical with the arc surface facing downward. The connecting shaft is vertically penetrated through the bottom of the tower body. The top of the connecting shaft is fixed to the nozzle. The connecting shaft is rotatably connected to the tower body. The interior of the connecting shaft is hollow. The top of the connecting shaft is connected to the nozzle, and the bottom is used for an external liquid supply device. The air inlet is located below the nozzle.

10. A process for treating waste gas from the production of calcium dobesilate, characterized in that: The process of treating the production waste gas using the calcium dobesilate production waste gas treatment equipment as claimed in any one of claims 1 to 9 comprises the following steps: S1: First, pre-cool the exhaust gas, then start the first exhaust gas treatment device and the second exhaust gas treatment device, fill the outer cylinder and the inner cylinder with activated carbon, and pass the exhaust gas into the tower through the air inlet; S2: The nozzle rotates and sprays alkaline solution to neutralize the exhaust gas and reduce the sulfur dioxide content in the exhaust gas. The treated exhaust gas then goes upward into the outer cylinder, where the reciprocating activated carbon adsorbs the exhaust gas and adsorbs the remaining impurities in the exhaust gas. Finally, the exhaust gas is discharged through the outlet. S3: During the exhaust gas treatment process, the cleaning mechanism intermittently cleans the activated carbon inside the outer cylinder to extend the service life of the activated carbon.

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