Process for preparing acid by using hydrogen sulfide waste gas and waste sulfuric acid

Abstract

The invention discloses an acid-making process using hydrogen sulfide waste gas and waste sulfuric acid, and relates to the technical field of acid-making processes, and the acid-making process specifically comprises the following steps: step 1, high-temperature reaction and gas generation, step 2, gas purification and conversion, a demister and a spraying assembly are used for removing dust, impurities and harmful substances in the gas; and step 3, sulfur trioxide absorption and sulfuric acid preparation. According to the acid-making process using the hydrogen sulfide waste gas and the waste sulfuric acid, the absorption slurry is sprayed out through the nozzle to be in countercurrent contact with the gas mixture, physical absorption and chemical reaction are combined, dust, impurities and other harmful substances in the gas mixture are effectively removed, and the gas purification efficiency is improved; the nozzles at the upper end and the lower end are used for spraying and cleaning the corrugated plate, it is ensured that the corrugated plate is always kept clean, system efficiency reduction caused by blockage or pollution of the corrugated plate is reduced, and the operation efficiency and stability of the whole system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of acid production technology, and in particular to an acid production process utilizing hydrogen sulfide waste gas and waste sulfuric acid. Background Art

[0002] In the chemical production process, hydrogen sulfide waste gas and waste sulfuric acid are common industrial wastes. Their treatment is not only related to environmental protection, but also affects the economic benefits of enterprises. An effective treatment method is to combine hydrogen sulfide waste gas and waste sulfuric acid to produce sulfuric acid through a specific chemical reaction, thereby realizing the recycling of resources. At present, the acid production process using hydrogen sulfide waste gas and waste sulfuric acid has made certain progress. The process usually includes the steps of pretreatment of hydrogen sulfide waste gas, reaction with waste sulfuric acid, purification of sulfuric acid, etc. In the pretreatment stage, the hydrogen sulfide waste gas is subjected to dust removal, desulfurization and other steps to remove impurities therein. Subsequently, the pretreated hydrogen sulfide waste gas reacts with waste sulfuric acid in a reactor to generate sulfuric acid. Finally, through the purification step, the generated sulfuric acid is further purified to obtain a sulfuric acid product that meets the standards; This prior art has achieved resource utilization of hydrogen sulfide waste gas and waste sulfuric acid to a certain extent, reducing environmental pollution. However, in practical applications, this process still has some obvious defects: Low demisting efficiency: During the acid production process, a large amount of gas mixture containing tiny droplets will be generated in the reactor. If these droplets are not removed in time, the purity of sulfuric acid will be affected and even cause corrosion to subsequent equipment. The existing demisting design often has the problem of low demisting efficiency, resulting in the inability to effectively remove the droplets in the gas mixture. Defoggers are prone to contamination: After long-term operation, the outer wall of the demister is prone to accumulate dirt, particulate matter and residual droplets, which will not only reduce the demisting efficiency, but also increase the maintenance cost of the equipment. The existing demister cleaning methods are often not efficient enough to ensure the continuous cleaning of the outer wall of the demister. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an acid production process using hydrogen sulfide waste gas and waste sulfuric acid, which solves the technical problems mentioned in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical scheme: an acid production process using hydrogen sulfide waste gas and waste sulfuric acid, specifically comprising the following steps: Step 1, high temperature reaction and gas generation: hydrogen sulfide waste gas and waste sulfuric acid are simultaneously fed into a high temperature reactor. At high temperature, hydrogen sulfide and oxygen undergo combustion reaction to generate sulfur dioxide and water vapor. At the same time, waste sulfuric acid decomposes at high temperature to generate sulfur dioxide, oxygen and water vapor. After the reaction is completed, the generated gas mixture is discharged from the reactor. Step 2: Gas purification and conversion: The derived gas mixture first enters the tower body, where dust, impurities and harmful substances in the gas are removed by using a demister and a spray assembly. The purified gas is then sent to a converter, where sulfur dioxide further reacts with oxygen under the action of a catalyst to generate sulfur trioxide. Step 3: Sulfur trioxide absorption and sulfuric acid preparation: The gas discharged from the converter is sent to an absorption tower, where sulfur trioxide is absorbed by concentrated sulfuric acid or water to produce industrial sulfuric acid. The sulfuric acid collected at the bottom of the absorption tower is further processed and then sent to a storage tank for storage.

[0005] As a further preferred embodiment of the present technical solution, an air inlet channel is provided on one side of the lower end of the tower body, and an exhaust channel is provided on the top of the tower body. The air inlet channel is used to transport the gas mixture in step one into the tower body, and then the dust, impurities and other harmful substances in the gas are removed by a spray assembly and a demister, and the purified gas is discharged through the exhaust channel.

[0006] As a further preferred embodiment of the present technical solution, a liquid inlet pipe and a liquid discharge pipe are respectively provided at the bottom of one side of the tower body, and the liquid inlet pipe is located above the liquid discharge pipe.

[0007] As a further preferred embodiment of the present technical solution, a demister is arranged inside the tower body, and the demister includes a plurality of groups of corrugated plates, and the plurality of groups of corrugated plates are arranged in sequence.

[0008] As a further preferred embodiment of the present technical solution, the spray assembly includes a bracket fixedly mounted on the inner wall of the tower body, and the two brackets are located at the upper and lower ends of the demister, a plurality of nozzles are arranged on the inner walls of the two brackets, and the nozzles are connected through a first delivery pipe, one end of the first delivery pipe is connected to a pump body, a second delivery pipe is arranged at the liquid inlet end of the pump body, and the second delivery pipe is installed at the bottom of the tower body.

[0009] As a further preferred embodiment of the present technical solution, the cleaning component includes a support frame fixedly mounted on the inner wall of the box body, a rack is slidably connected to the support frame, a gear frame is fixedly connected to the top of the rack, a servo motor fixedly mounted on the box body is arranged above the gear frame, a half gear meshing with the gear frame is fixedly connected to the output end of the servo motor, a driven gear is meshingly connected to the bottom of the rack, a connecting shaft is fixedly connected to the axis center of the driven gear, the connecting shaft is rotatably mounted on the tower body, adjacent connecting shafts are connected for transmission via synchronous pulleys, and the defogger is fixedly mounted on the connecting shaft.

[0010] As a further preferred embodiment of the present technical solution, a cross bar is fixedly connected to the tower body and the inner wall of the box body, and there are multiple groups of cross bars, which are respectively located between adjacent corrugated plates. A movable groove is opened on the cross bar, and a movable plate is slidably connected in the movable groove. A row of rotating rods is rotatably connected to the movable plate, a spline rod is fixedly connected to the bottom of the rotating rod, and a cleaning rod is slidably connected to the spline rod.

[0011] As a further preferred embodiment of the present technical solution, a driving motor is fixedly mounted on the cross bar, a swing rod is rotatably connected to the cross bar, a linkage rod is rotatably connected to the other end of the swing rod, the other end of the linkage rod is rotatably connected to the movable plate, and a sliding groove is provided on the surface of the swing rod, a movable rod is fixedly connected to the output end of the driving motor, a guide block is rotatably connected to the other end of the movable rod, and the guide block is slidably mounted in the sliding groove.

[0012] As a further preferred embodiment of the present technical solution, a driving gear is fixedly connected to the top of the rotating rod, a gear rod is meshingly connected to one side of the driving gear, and the gear rod is fixedly mounted on the cross bar.

[0013] As a further optimization of the present technical solution, a fixing plate is fixedly connected to the bottom of the cross bar, a reciprocating groove is provided on the surface of the fixing plate, a support rod is fixedly connected to the top of the cleaning rod, the support rod is located on the outside of the spline rod, and a ring is fixedly connected to the top of the support rod, a guide rod is fixedly connected to one side of the ring, and the guide rod is slidably installed in the reciprocating groove. Compared with the prior art, it has the following beneficial effects: The absorption slurry is sprayed out through the nozzle to contact with the gas mixture in countercurrent, and the dust, impurities and other harmful substances in the gas mixture are effectively removed by combining physical absorption and chemical reaction, thereby improving the efficiency of gas purification. The corrugated plate is sprayed and cleaned by the nozzles at the upper and lower ends to ensure that the corrugated plate is always kept clean, reducing the decline in system efficiency caused by blockage or contamination of the corrugated plate, and improving the operating efficiency and stability of the entire system.

[0014] The demister is driven by a servo motor to drive the meshing transmission of the half gear and the gear frame to achieve the reciprocating swing of the demister. This dynamic change increases the collision frequency and contact area between the gas mixture and the demister, allowing tiny droplets to more effectively aggregate into larger droplets and quickly separate under the action of gravity; the reciprocating change of the demister angle promotes the collision and aggregation of droplets in different directions, accelerates the settling speed of droplets, and thus significantly improves the defog efficiency and separation effect; the reciprocating demister design allows the droplets in the gas mixture to contact the demister more comprehensively, reduces the possibility of droplet escape, and improves the overall processing efficiency; the stable mechanical transmission and precise control mechanism ensure the continuity and reliability of the defog process, and is suitable for gas mixture processing under various working conditions.

[0015] By driving the movable rod, the guide block and the swing rod to rotate synchronously, and the linkage rod and the movable plate to slide back and forth through the driving motor, the outer wall of the demister is automatically cleaned by the cleaning rod; the reciprocating movement and rotation of the cleaning rod, as well as the up and down movement design, ensure that each position of the outer surface of the corrugated plate can be fully cleaned, and the dirt, particulate matter and residual droplets are effectively removed; the continuous contact and friction between the bristles of the cleaning rod and the outer wall of the corrugated plate not only maintains the clean state of the corrugated plate, but also improves the demisting efficiency of the demister; the problem of reduced demisting efficiency due to contamination of the corrugated plate is reduced, the service life of the demister is extended, and the maintenance cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the spray assembly in the present invention; Figure 3 It is a partial structural schematic diagram of the box body, tower body, demister and cleaning component in the present invention; Figure 4 It is a partial structural schematic diagram of the support frame, gear frame, rack, driven gear, cross bar and demister in the present invention; Figure 5 It is a schematic diagram of the structure of the servo motor, gear frame, half gear and rack in the present invention; Figure 6 It is a structural schematic diagram of the cross bar, the movable plate and the cleaning rod in the present invention; Figure 7 It is a schematic diagram of the structure of the rotating rod, the spline rod, the cleaning rod, the supporting rod, the collar and the guide rod in the present invention; Figure 8 It is a schematic diagram of the structure of the cross bar, gear bar and fixed plate in the present invention.

[0017] In the figure: 1, tower body; 2, box body; 3, spray assembly; 4, demister; 5, cleaning assembly; 11, air inlet channel; 12, exhaust channel; 13, liquid inlet pipe; 14, liquid discharge pipe; 31, bracket; 32, nozzle; 33, first delivery pipe; 34, pump body; 35, second delivery pipe; 51, support frame; 52, gear frame; 53, servo motor; 54, half gear; 55, rack; 56, connecting shaft; 57, from Moving gear; 58, cross bar; 59, moving plate; 510, rotating rod; 511, spline rod; 512, cleaning rod; 513, driving motor; 514, movable rod; 515, swing rod; 516, guide block; 517, linkage rod; 518, support rod; 519, collar; 520, guide rod; 521, driving gear; 522, moving groove; 523, gear rod; 524, fixed plate; 525, reciprocating groove. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: Combination Figure 1-Figure 8 As shown, the present invention provides a technical solution: an acid production process using hydrogen sulfide waste gas and waste sulfuric acid, specifically comprising the following steps: Step 1, high temperature reaction and gas generation: hydrogen sulfide waste gas and waste sulfuric acid are simultaneously fed into a high temperature reactor, which is heated to an appropriate temperature, usually above several hundred degrees Celsius, to ensure efficient reaction. At high temperature, hydrogen sulfide and oxygen undergo combustion reaction to generate sulfur dioxide and water vapor. At the same time, waste sulfuric acid decomposes at high temperature to generate sulfur dioxide, oxygen and water vapor. The temperature and pressure in the reactor need to be precisely controlled to ensure efficient and safe reaction. After the reaction is completed, the generated gas mixture (containing sulfur dioxide, oxygen and water vapor as well as possible incompletely reacted hydrogen sulfide and other impurities) is discharged from the reactor and is ready to enter the next step; Step 2, gas purification and conversion: the derived gas mixture first enters the tower body 1, and the dust, impurities and other harmful substances in the gas are removed by using the demister 4 and the spray assembly 3. The purified gas is purer, which is conducive to the subsequent conversion reaction. The purified gas is then sent to a converter. In the converter, sulfur dioxide further reacts with oxygen under the action of a catalyst to generate sulfur trioxide. The selection of the catalyst and the use conditions (such as temperature, pressure, etc.) have an important influence on the conversion efficiency. Usually, the converter needs to be heated to an appropriate temperature and maintained within a certain pressure range; Step 3: Absorption of sulfur trioxide and preparation of sulfuric acid: The gas discharged from the converter is sent to an absorption tower, where sulfur trioxide is absorbed by concentrated sulfuric acid or water to produce industrial sulfuric acid. The absorption process requires precise control of the temperature, concentration and flow rate of the absorption liquid to ensure the complete absorption of sulfur trioxide and the high quality of sulfuric acid. The sulfuric acid collected at the bottom of the absorption tower is sent to a storage tank for storage after further treatment (such as filtration, cooling, etc.); On one side of the lower end of the tower body 1, an air inlet channel 11 is specially designed and installed. The main function of this air inlet channel 11 is to transport the gas that has been mixed in step one to the internal space of the tower body 1. After the gas mixture enters the tower body through this channel, it will undergo a series of purification treatments. In order to achieve this purpose, the tower body 1 is equipped with a high-efficiency spray component 3 and a demister 4. The spray component 3 can effectively capture and remove dust, impurities and other harmful substances in the gas by spraying absorption slurry, and the demister 4 further ensures that the droplets and tiny particles in the gas are completely removed, thereby ensuring the purity of the gas. After these purification steps, the purified gas will be discharged through the exhaust channel 12 at the top of the tower body 1 to ensure that the discharged gas meets environmental protection standards; In addition, a liquid inlet pipe 13 and a liquid discharge pipe 14 are respectively arranged at the bottom of one side of the tower body 1. The design positions of the two pipes are very clever. The liquid inlet pipe 13 is located above the liquid discharge pipe 14, which can ensure that the absorption slurry can be smoothly introduced into the tower body 1. During the absorption process, the absorption slurry will be mixed with the gas to capture harmful components therein. After the absorption process is completed, the used absorption slurry will be discharged through the liquid discharge pipe 14 for further recycling or proper treatment, thereby achieving the purpose of resource reuse and environmental protection. Inside the tower body 1, a demister 4 is specially installed to ensure that the gas reaches a higher purity before being discharged. The demister 4 is composed of a plurality of groups of corrugated plates, which are arranged in sequence and fixed in appropriate positions. The design of the corrugated plates enables the gas to collide and contact with the plate surface when passing through, thereby effectively removing droplets and tiny particles in the gas. This structure not only improves the demisting efficiency, but also ensures the efficient and stable operation of the entire purification process. Through this multi-level and multi-step purification method, the tower body 1 can ensure that the discharged gas achieves the best purification effect and contributes to environmental protection. The spray assembly 3 includes a bracket 31 fixedly mounted on the inner wall of the tower body 1. These brackets 31 are respectively located at the upper and lower ends of the demister 4. On the inner walls of the two brackets 31, a plurality of nozzles 32 are arranged. These nozzles 32 are connected and arranged with each other through a first delivery pipe 33. One end of the first delivery pipe 33 is connected with a pump body 34. The liquid inlet end of the pump body 34 is provided with a second delivery pipe 35. The second delivery pipe 35 is installed at the bottom of the tower body 1. The air inlet channel 11 is responsible for guiding the gas mixture into the tower body 1. After the gas mixture enters the tower body 1, it will be sprayed through the spray assembly 3. Specifically, by starting the pump body 34 and using the second delivery pipe 35 to extract the absorption slurry into the first delivery pipe 33, and then through the nozzle 32 The absorption slurry is sprayed out. During the rising process of the gas mixture, it will be in countercurrent contact with the absorption slurry sprayed from the first nozzle 32 located above. This combination of physical absorption and chemical reaction can effectively remove dust, impurities and other harmful substances in the gas mixture. At the same time, the slurry is sprayed out by the nozzles 32 at the upper and lower ends to realize the spray cleaning of the corrugated plate during the cleaning process. Such operation can ensure that the corrugated plate is always kept clean, thereby improving the operating efficiency and stability of the entire system. In this process, it is necessary to pay attention to controlling the flow rate and spray intensity of the slurry to ensure that the demister 4 can be thoroughly cleaned. In this way, the spray assembly 3 can not only effectively treat the gas mixture, but also ensure the efficient and stable operation of the system; The design of the cleaning component 5 includes a support frame 51 fixedly mounted on the inner wall of the box body 2, a rack 55 is slidably connected to the support frame 51, the top of the rack 55 is fixedly connected to a gear frame 52, a servo motor 53 fixedly mounted on the box body 2 is arranged above the gear frame 52, the output end of the servo motor 53 is fixedly connected to a half gear 54 meshing with the gear frame 52 for transmission, the bottom of the rack 55 is meshingly connected to a driven gear 57, and the axis of the driven gear 57 is fixedly connected to a connecting shaft 56, the connecting shaft 56 is rotatably mounted on the tower body 1, and adjacent connecting shafts 56 are connected for transmission via synchronous pulleys, and in addition, the demister 4 is fixedly mounted on the connecting shaft 56; By turning on the servo motor 53, the half gear 54 is driven to rotate synchronously, and the half gear 54 drives the meshing gear frame 52 to move back and forth, so that the gear frame 52 drives the rack 55 located on the support frame 51 to move back and forth, so that the rack 55 drives the meshing driven gear 57 and the connecting shaft 56 to rotate back and forth, and then drives the demister 4 to swing back and forth through the connecting shaft 56. When the gas mixture collides with the demister 4, it can be more effectively gathered into larger droplets and separated under the action of gravity; When the angle of the demister 4 changes, the collision angle and position of the gas mixture and the demister 4 will also change accordingly. This change allows the tiny particles or droplets in the gas mixture to contact the demister 4 more frequently and more comprehensively, thereby improving the collision efficiency. After the tiny droplets in the gas mixture collide with the demister 4, due to the effects of surface tension and inertia, they may adhere to the demister 4 or merge with other droplets. The reciprocating change of the angle of the demister 4 helps these droplets collide and merge in multiple directions to form larger droplets. Since the sedimentation speed of larger droplets under the action of gravity is much faster than that of tiny droplets, after the droplets are aggregated by the reciprocating change of the angle of the demister 4, these larger droplets can be separated from the gas mixture more quickly under the action of gravity. In this way, not only the separation efficiency is improved, but also the treatment of the gas mixture is made more efficient and reliable. In this way, the cleaning component 5 can effectively improve the working efficiency of the demister 4, ensuring that the droplets in the gas mixture can be separated more quickly and thoroughly, thereby improving the operating efficiency and reliability of the entire system; Between the tower body 1 and the inner wall of the box body 2, multiple groups of cross bars 58 are fixedly connected. These cross bars 58 are carefully arranged between adjacent corrugated plates. In order to achieve more flexible operation, multiple moving grooves 522 are opened on the cross bars 58. Moving plates 59 are slidably connected in these moving grooves 522. The moving plates 59 are rotatably connected to a row of rotating rods 510. The bottoms of these rotating rods 510 are fixedly connected to spline rods 511. Cleaning rods 512 are slidably connected to the spline rods 511. The outer wall of the cleaning rod 512 is carefully designed with bristles to ensure the cleaning effect. In order to realize automatic cleaning, a driving motor 513 is fixedly installed on the cross bar 58. In addition, the cross bar 58 is also rotatably connected to a swing rod 515, and the other end of the swing rod 515 is rotatably connected to a linkage rod 517. The other end of the linkage rod 517 is rotatably connected to a movable plate 59, ensuring the smooth operation of the linkage mechanism. A sliding groove is provided on the surface of the swing rod 515 to facilitate the sliding installation of a guide block 516. The guide block 516 is connected to a movable rod 514 fixedly connected to the output end of the driving motor 513, and the other end of the movable rod 514 is rotatably connected to the guide block 516. By turning on the driving motor 513, the movable rod 514 and the guide block 516 can be driven to rotate synchronously. The guide block 516 slides in the slide groove when rotating, thereby driving the swing rod 515 to swing back and forth on the cross bar 58. During the reciprocating swing of the swing rod 515, the movable plate 59 is driven to slide back and forth on the cross bar 58 through the linkage rod 517. During the sliding process, the movable plate 59 drives the rotating rod 510, the spline rod 511, and the cleaning rod 512 to move back and forth, so that the cleaning rod 512 can effectively clean the outer wall of the defogger 4; In order to further improve the cleaning efficiency, a driving gear 521 is fixedly connected to the top of the rotating rod 510, and one side of the driving gear 521 is meshed with the gear rod 523, and the gear rod 523 is fixedly installed on the cross bar 58. When the moving plate 59 drives the rotating rod 510, the spline rod 511, and the cleaning rod 512 to reciprocate, due to the meshing of the driving gear 521 and the gear rod 523, the rotating rod 510, the spline rod 511, and the cleaning rod 512 can drive the rotating rod 510, the spline rod 511, and the cleaning rod 512 to reciprocate during the reciprocating movement. The combination of this reciprocating rotation and reciprocating movement ensures the comprehensive cleaning of the outer wall of the demister 4, thereby achieving an efficient and thorough cleaning effect. At the bottom of the cross bar 58, there is a fixed plate 524 that is firmly connected. The surface of this fixed plate 524 is designed with a special reciprocating groove 525 to facilitate the movement of other parts. At the top of the cleaning rod 512, there is a support rod 518 that is fixedly connected. This support rod 518 is located on the outside of the spline rod 511. In order to further enhance the stability of the structure, a collar 519 is also fixedly connected to the top of the support rod 518. One side of the collar 519 is fixedly connected to a guide rod 520. The guide rod 520 is designed to be slidably installed in the reciprocating groove 525. When the moving plate 59 drives the rotating rod 510, the spline rod 511, and the cleaning rod 512 to reciprocate, the guide rod 520 can Sliding smoothly in the reciprocating groove 525, this design enables the ring 519, the support rod 518, and the cleaning rod 512 to move up and down together with the spline rod 511. This structural design enables the cleaning rod 512 to effectively clean various positions on the outer surface of the corrugated plate during the up and down movement. In this process, the bristles of the cleaning rod 512 will continuously contact and generate friction with the outer wall of the corrugated plate. It is this continuous friction that can effectively remove dirt, particles or residual droplets attached to the outer wall of the corrugated plate. In this way, not only can the corrugated plate be kept clean, but also the demisting efficiency can be significantly improved, ensuring the normal operation of the equipment and extending its service life.

[0020] In the embodiment of the present invention, the air inlet channel 11 is responsible for guiding the gas mixture into the tower body 1. After entering the tower body 1, the gas mixture is pumped into the first delivery pipe 33 by starting the pump body 34 and using the second delivery pipe 35, and then the absorption slurry is sprayed out through the nozzle 32. In the process of the gas mixture rising, it will be in countercurrent contact with the absorption slurry sprayed from the first nozzle 32 above. This combination of physical absorption and chemical reaction can effectively remove dust, impurities and other harmful substances in the gas mixture, and the slurry is sprayed out by the nozzles 32 at the upper and lower ends to achieve spray cleaning of the corrugated plate during the cleaning process. Such operation can ensure that the corrugated plate is always kept clean, thereby improving the operating efficiency and stability of the entire system. In this process, it is necessary to pay attention to controlling the flow rate and spray intensity of the slurry to ensure that the demister 4 can be thoroughly cleaned. The servo motor 53 is turned on to drive the half gear 54 to rotate synchronously, and the half gear 54 drives the meshing gear frame 52 to move back and forth, so that the gear frame 52 drives the rack 55 located on the support frame 51 to move back and forth, so that the rack 55 drives the meshing driven gear 57 and the connecting shaft 56 to rotate back and forth, and then drives the demister 4 to swing back and forth through the connecting shaft 56, so that when the gas mixture collides with the demister 4, it can be more effectively gathered into larger droplets and separated under the action of gravity. When the angle of the demister 4 changes, the collision angle and position of the gas mixture with the demister 4 will also change accordingly. This change allows the tiny particles or droplets in the gas mixture to be more Frequent and more comprehensive contact with the demister 4 improves the collision efficiency. After colliding with the demister 4, the tiny droplets in the gas mixture may adhere to the demister 4 or merge with other droplets due to the surface tension and inertia force. The reciprocating change of the angle of the demister 4 helps these droplets to collide and coalesce in multiple directions to form larger droplets. Since the sedimentation speed of larger droplets under the action of gravity is much faster than that of tiny droplets, after the droplet coalescence is promoted by the reciprocating change of the angle of the demister 4, these larger droplets can be separated from the gas mixture more quickly under the action of gravity. In this way, not only the separation efficiency is improved, but also the treatment of the gas mixture is more efficient and reliable; By turning on the driving motor 513, the movable rod 514 and the guide block 516 are driven to rotate synchronously. When the guide block 516 rotates, it slides in the slide groove, thereby driving the swing rod 515 to swing back and forth on the cross bar 58. When the swing rod 515 swings back and forth, the linkage rod 517 drives the movable plate 59 to slide back and forth on the cross bar 58, so that the movable plate 59 drives the rotating rod 510, the spline rod 511, and the cleaning rod 512 to move back and forth, and then the cleaning rod 512 cleans the outer wall of the defogger 4. When the movable plate 59 drives the rotating rod 510, the spline rod 511, and the cleaning rod 512 to move back and forth, the driving gear 521 is engaged with the gear rod 523, which makes the rotating rod 510, the spline rod 511, and the cleaning rod 512 move back and forth to drive the rotating rod 510, the spline rod 511, and the cleaning rod 512 to move back and forth. 0. The spline rod 511 and the cleaning rod 512 reciprocate. When the movable plate 59 drives the rotating rod 510, the spline rod 511 and the cleaning rod 512 to reciprocate, the guide rod 520 can slide in the reciprocating groove 525, and can drive the ring 519, the support rod 518 and the cleaning rod 512 on the spline rod 511 to move up and down. This design enables the cleaning rod 512 to clean various positions on the outer surface of the corrugated plate during the up and down movement. In this process, the bristles of the cleaning rod 512 will continuously contact and rub against the outer wall of the corrugated plate. It is this friction that can effectively remove dirt, particulate matter or residual droplets attached to the outer wall of the corrugated plate. In this way, not only can the corrugated plate be kept clean, but also the demisting efficiency can be improved. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for producing acid using waste hydrogen sulfide gas and waste sulfuric acid, characterized in that: The specific steps include: Step 1, high temperature reaction and gas generation: hydrogen sulfide waste gas and waste sulfuric acid are simultaneously fed into a high temperature reactor. At high temperature, hydrogen sulfide and oxygen undergo combustion reaction to generate sulfur dioxide and water vapor. At the same time, waste sulfuric acid decomposes at high temperature to generate sulfur dioxide, oxygen and water vapor. After the reaction is completed, the generated gas mixture is discharged from the reactor. Step 2: Gas purification and conversion: The derived gas mixture first enters the tower body (1), and dust, impurities and harmful substances in the gas are removed by using a demister (4) and a spray assembly (3). The purified gas is then sent to a converter, where sulfur dioxide further reacts with oxygen under the action of a catalyst to generate sulfur trioxide. Step 3: Sulfur trioxide absorption and sulfuric acid preparation: The gas discharged from the converter is sent to an absorption tower, where sulfur trioxide is absorbed by concentrated sulfuric acid or water to produce industrial sulfuric acid. The sulfuric acid collected at the bottom of the absorption tower is further processed and then sent to a storage tank for storage.

2. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: An air inlet passage (11) is provided on one side of the lower end of the tower body (1), and an air exhaust passage (12) is provided on the top of the tower body (1). The air inlet passage (11) is used to convey the gas mixture in step one into the tower body (1), and then the dust, impurities and other harmful substances in the gas are removed by using the spray assembly (3) and the demister (4), and the purified gas is then discharged through the air exhaust passage (12).

3. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: A liquid inlet pipe (13) and a liquid discharge pipe (14) are respectively arranged at the bottom of one side of the tower body (1), and the liquid inlet pipe (13) is located above the liquid discharge pipe (14).

4. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: A demister (4) is arranged inside the tower body (1), and the demister (4) comprises a plurality of groups of corrugated plates, and the plurality of groups of corrugated plates are arranged in sequence.

5. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: The spray assembly (3) comprises a bracket (31) fixedly mounted on the inner wall of the tower body (1), and the two brackets (31) are located at the upper and lower ends of the demister (4). The inner walls of the two brackets (31) are provided with a plurality of nozzles (32), and the nozzles (32) are connected via a first delivery pipe (33). A pump body (34) is connected to one end of the first delivery pipe (33), and a second delivery pipe (35) is provided at the liquid inlet end of the pump body (34), and the second delivery pipe (35) is installed at the bottom of the tower body (1).

6. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: The cleaning assembly (5) comprises a support frame (51) fixedly mounted on the inner wall of the housing (2); a rack (55) is slidably connected to the support frame (51); a gear frame (52) is fixedly connected to the top of the rack (55); a servo motor (53) fixedly mounted on the housing (2) is arranged above the gear frame (52); a half gear (54) meshing with the gear frame (52) is fixedly connected to the output end of the servo motor (53); a driven gear (57) is meshingly connected to the bottom of the rack (55); a connecting shaft (56) is fixedly connected to the axis of the driven gear (57); the connecting shaft (56) is rotatably mounted on the tower body (1); adjacent connecting shafts (56) are connected in transmission via a synchronous pulley; and a demister (4) is fixedly mounted on the connecting shaft (56).

7. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: The tower body (1) and the inner wall of the box body (2) are fixedly connected with a cross bar (58), and a plurality of cross bars (58) are provided, each of which is located between adjacent corrugated plates. A moving groove (522) is provided on the cross bar (58), and a moving plate (59) is slidably connected in the moving groove (522). A row of rotating rods (510) is rotatably connected to the moving plate (59), a spline rod (511) is fixedly connected to the bottom of the rotating rod (510), and a cleaning rod (512) is slidably connected to the spline rod (511).

8. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: A driving motor (513) is fixedly mounted on the cross bar (58), a swinging rod (515) is rotatably connected to the cross bar (58), the other end of the swinging rod (515) is rotatably connected to a linkage rod (517), the other end of the linkage rod (517) is rotatably connected to the movable plate (59), a sliding groove is provided on the surface of the swinging rod (515), an output end of the driving motor (513) is fixedly connected to a movable rod (514), the other end of the movable rod (514) is rotatably connected to a guide block (516), and the guide block (516) is slidably mounted in the sliding groove.

9. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: A driving gear (521) is fixedly connected to the top of the rotating rod (510), a gear rod (523) is meshingly connected to one side of the driving gear (521), and the gear rod (523) is fixedly mounted on the crossbar (58).

10. The acid production process using hydrogen sulfide waste gas and waste sulfuric acid according to claim 1, characterized in that: A fixing plate (524) is fixedly connected to the bottom of the crossbar (58), a reciprocating groove (525) is formed on the surface of the fixing plate (524), a support rod (518) is fixedly connected to the top of the cleaning rod (512), the support rod (518) is located outside the spline rod (511), and a collar (519) is fixedly connected to the top of the support rod (518), a guide rod (520) is fixedly connected to one side of the collar (519), and the guide rod (520) is slidably installed in the reciprocating groove (525).

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