Efficient mass transfer desulfurization tower

Abstract

The invention belongs to the technical field of waste gas desulfurization, and particularly relates to an efficient mass transfer desulfurization tower which comprises a desulfurization tower body, a gas inlet pipe and a gas exhaust pipe, the gas inlet pipe is communicated with the bottom of one side of the desulfurization tower body, the gas exhaust pipe is communicated with the top of the other side of the desulfurization tower body, and a slurry pond is arranged at the bottom of the desulfurization tower body. A gas flow transmission power mechanism, a dynamic mass transfer synergistic mechanism, an atomization spraying mechanism and a demister are respectively arranged in the desulfurization tower from bottom to top, and a compression gas injection forced oxidation mechanism is arranged on the desulfurization tower; the waste gas kinetic energy is converted into mechanical energy, compressed injection of air is achieved through linkage gear transmission, calcium sulfite is forcibly oxidized into calcium sulfate, resource utilization of desulfurization products is achieved, and in the limited space of the desulfurization tower, sulfur-containing waste gas rises in a rotational flow mode and collides with atomized slurry at a high speed, the slurry is cut up, and gas waves continuously collide with one another to conduct rotary cutting. Liquid particles are crushed to be finer and thinner, and gas and liquid are fully mixed, so that the desulfurization efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of waste gas desulfurization, and specifically refers to a high-efficiency mass transfer desulfurization tower. Background Art

[0002] With the acceleration of industrialization, the emission of large amounts of sulfur-containing waste gas has posed a serious threat to the environment and human health. Sulfur dioxide, as one of the main air pollutants, is a key factor in the formation of acid rain. It not only corrodes infrastructure such as buildings and bridges, but also damages soil quality, harms crop growth, and affects ecological balance. Therefore, efficient desulfurization of sulfur-containing waste gas has become an important issue that needs to be urgently addressed in the industrial field.

[0003] Traditional desulfurization towers have many limitations in terms of mass transfer efficiency. On the one hand, the gas-liquid contact method is not optimized enough, and simple spraying or static mixing is usually used, which makes it difficult for the slurry to fully and evenly contact the exhaust gas, resulting in limited mass transfer area and low sulfur dioxide absorption efficiency; on the other hand, traditional desulfurization methods often focus on the initial removal of sulfur dioxide, and lack effective means for the subsequent treatment of calcium sulfite, an intermediate product produced during the desulfurization process. Most calcium sulfite is in a natural oxidation state, and this oxidation process is slow. During the limited residence time in the desulfurization tower, only part of the calcium sulfite can be converted into calcium sulfate, which means that a large amount of unoxidized calcium sulfite is discharged with the waste residue. During subsequent storage, due to the poor stability of calcium sulfite, it is easily affected by environmental factors such as temperature and humidity, and re-decomposes and releases sulfur dioxide, causing secondary pollution, which not only harms the surrounding ecological environment, but also greatly reduces the previous desulfurization efforts. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present invention provides a high-efficiency mass transfer desulfurization tower, which converts the kinetic energy of exhaust gas into mechanical energy. The mechanical energy serves as a power source to provide power for multiple components, and the linked gear transmission realizes the compressed injection of air, and the calcium sulfite is forced to be oxidized into calcium sulfate, thereby realizing the resource utilization of the desulfurization products. In the limited space of the desulfurization tower, the sulfur-containing exhaust gas rises through the dynamic mass transfer enhancement mechanism in the desulfurization tower, and collides with the atomized desulfurization slurry at high speed. The desulfurization slurry is shredded, and the gas and liquid continuously collide and cut with each other. The liquid particles are crushed finer and finer, and the gas and liquid are fully mixed to form a stable dynamic mass transfer layer, thereby improving the desulfurization efficiency.

[0005] In order to achieve the above functions, the technical solution adopted by the present invention is as follows: a high-efficiency mass transfer desulfurization tower, comprising a desulfurization tower, an air inlet pipe and an exhaust pipe, the air inlet pipe is connected to the bottom of one side of the desulfurization tower, and the exhaust pipe is connected to the top of the other side of the desulfurization tower. A slurry pool is arranged at the bottom of the desulfurization tower, and an airflow transmission power mechanism, a dynamic mass transfer efficiency enhancement mechanism, an atomizing spray mechanism and a demister are arranged inside the desulfurization tower from bottom to top. A compressed air injection forced oxidation mechanism is arranged on the desulfurization tower, and a Venturi tube is fixedly installed inside the air inlet pipe, and the Venturi tube includes an inlet section, a contraction section and a throat, and the throat of the Venturi tube is located at the connection point between the air inlet pipe and the desulfurization tower, the airflow transmission power mechanism includes a central shaft and an impeller, the bottom end of the central shaft is rotatably arranged on the inner bottom wall of the desulfurization tower, and the top end of the central shaft is rotatably penetrated through the top wall of the desulfurization tower, and the impeller is fixedly sleeved on the central shaft, and the impeller and the Venturi tube are located on the same horizontal line.

[0006] As a preferred technical solution of the present invention, the compressed gas injection forced oxidation mechanism includes a reciprocating motion component and an air compression component, the reciprocating motion component is installed on the top wall of the desulfurization tower, the air compression component is installed on the outer wall of the desulfurization tower, the reciprocating motion component and the air compression component are connected, the reciprocating motion component includes a piston cylinder, a semicircular gear and a movable gear ring, a fixed support plate is provided on the top wall of the desulfurization tower, the fixed support plate is relatively arranged in two groups, the piston cylinder is arranged in two groups, the two groups of piston cylinders are respectively fixedly installed on the two groups of fixed support plates, the semicircular gear is fixedly installed on the top of the center shaft, the movable gear ring is fixedly connected between the output ends of the two groups of piston cylinders, and the movable gear ring is located on the outside of the semicircular gear and is meshed with the semicircular gear.

[0007] As a preferred technical solution of the present invention, the air compression component includes a piston cylinder 2, an annular air pipe and an air jet head. The piston cylinder 2 is fixedly installed on the outer wall of the desulfurization tower. The piston cylinder 2 is arranged in two groups. The two groups of piston cylinder 2 are arranged corresponding to the two groups of piston cylinder 1. An air pipe 1 is connected between the piston cylinder 2 and the piston cylinder 1. The bottom of the side wall of the piston cylinder 2 is connected with an air supply pipe. The annular air pipe is fixedly surrounded near the bottom of the desulfurization tower. The annular air pipe is connected with the piston cylinder 2. The air pipe 2 is connected between the annular air pipe and the piston cylinder 2. The air jet heads are arranged in multiple groups in an annular array and pass through the annular air pipe. The air jet heads pass through the bottom of the side wall of the desulfurization tower. Both the air supply pipe and the air pipe 2 are provided with one-way valves.

[0008] As a preferred technical solution of the present invention, the dynamic mass transfer enhancement mechanism includes an outer gear ring, a driving gear, a transmission gear, an inner vortex disk and an outer vortex disk. The outer gear ring is rotatably arranged on the inner wall of the desulfurization tower, the driving gear is fixedly sleeved on the central axis, a support plate is fixedly arranged on the inner wall of the desulfurization tower, the transmission gear is rotatably arranged on the support plate, the transmission gear is located between the outer gear ring and the driving gear, one side of the transmission gear is meshed with the outer gear ring, and the other side of the transmission gear is meshed with the driving gear, the inner vortex disk is fixedly sleeved on the central axis, and a connecting rod is fixedly connected to the bottom of the outer vortex disk, and the connecting rod is connected to the outer gear ring.

[0009] As a preferred technical solution of the present invention, the blades on the inner vortex disk have an inward curvature, the curvature direction of the blades of the outer vortex disk is opposite to that of the inner vortex disk, the inner vortex disk is correspondingly arranged on the inner side of the outer vortex disk, and both the inner vortex disk and the outer vortex disk are arranged in multiple layers.

[0010] As a preferred technical solution of the present invention, the atomizing spray mechanism includes an annular spray pipe and an atomizing nozzle. The annular spray pipe is provided in multiple groups. The multiple groups of annular spray pipes are distributed in a stacked manner in the desulfurization tower. The multiple groups of annular spray pipes gradually increase in size from bottom to top. The atomizing nozzles are in an annular array and multiple groups are evenly installed under the annular spray pipe. A delivery pipe runs through the side wall of the desulfurization tower. The delivery pipe is provided in multiple groups and is correspondingly connected to the multiple groups of annular spray pipes.

[0011] As a preferred technical solution of the present invention, a circulation pump is fixedly installed on the outer wall of the desulfurization tower, the inlet of the circulation pump is connected to a circulation input pipe, a filter is installed at the pipe mouth of the circulation input pipe, the circulation input pipe is connected to the slurry pool, the outlet of the circulation pump is connected to a circulation output pipe, and the circulation output pipe is connected to the delivery pipe.

[0012] As a preferred technical solution of the present invention, the demister is rotatably mounted on the inner wall of the desulfurization tower, the demister is fixedly mounted on the central axis, the demister is located below the exhaust pipe, and the bottom end of the central axis has multiple groups of stirring blades in a circular array.

[0013] Compared with the prior art, the present invention adopts the above structure to achieve the following beneficial effects: 1. The airflow transmission power mechanism converts the kinetic energy of the exhaust gas into mechanical energy. This part of the mechanical energy drives the semicircular gear to rotate. The semicircular gear causes the movable gear ring to produce linear motion. The linear motion of the movable gear ring can be directly transmitted to the piston cylinder one, and the output end of the piston cylinder one performs reciprocating motion accordingly. The two groups of piston cylinders one perform alternate suction motion, so that one group of piston cylinders two extracts external air through the air pipe, and the other group of piston cylinders two injects the extracted air into the slurry pool at the bottom of the desulfurization tower. The two groups of piston cylinders two alternately inject air into the slurry pool to maintain the continuity of air injection. The oxygen in the air reacts with calcium sulfite to forcibly oxidize calcium sulfite into calcium sulfate, ensuring that the desulfurization product exists in the form of stable calcium sulfate, effectively avoiding the risk of calcium sulfite decomposing and releasing sulfur dioxide during subsequent storage or treatment, consolidating the desulfurization results, and calcium sulfate can be used as a raw material for the production of building materials, realizing the resource utilization of desulfurization products, turning waste into treasure, reducing the cost of solid waste treatment, and creating additional economic value; 2. Exhaust gas enters the desulfurization tower through the Venturi tube. According to the Venturi effect, the speed increases and the pressure decreases. The high-speed airflow impacts the impeller to drive the central axis to rotate, converting the kinetic energy of the exhaust gas into mechanical energy. This part of the mechanical energy provides power for multiple components in the desulfurization tower, reducing external power dependence and reducing operating energy consumption; 3. The inner swirl disc and the outer swirl disc rotate at different speeds through a clever gear transmission design, generating a complex bidirectional swirl field. This swirl can strongly break up large droplets and bubbles in the gas-liquid mixture, refine the slurry droplets to the micron level, disperse the gas very densely, and increase the gas-liquid contact area exponentially. Compared with traditional desulfurization towers, the contact opportunity and reaction efficiency of sulfur dioxide and desulfurization slurry are greatly improved; 4. The diameters of multiple groups of annular spray pipes gradually increase from bottom to top, accurately matching the rising and diffusion characteristics of the exhaust gas in the tower. The atomizing nozzles in the annular array are used to atomize the slurry into tiny droplets and spray them out at high speed. The high-speed colliding slurry is fully mixed with the swirling rising exhaust gas. In the process of multiple collisions, crushing and mixing, the gas-liquid mass transfer is greatly promoted. Each unit mass of slurry can capture sulfur dioxide more efficiently, providing a strong guarantee for deep desulfurization. 5. The rotary demister uses centrifugal force and collision principle to remove tiny droplets, prevent the droplets from carrying unreacted acidic substances or desulfurization slurry, protect downstream equipment such as chimneys and induced draft fans, extend the service life of the entire exhaust gas treatment system, reduce equipment renewal costs, and reduce pollution to the surrounding environment, which is in line with the concept of green and environmental protection development. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure of a high-efficiency mass transfer desulfurization tower proposed by the present invention is shown in FIG. Figure 1 ; Figure 2A cross-sectional view of a high-efficiency mass transfer desulfurization tower proposed by the present invention; Figure 3 The overall structure of a high-efficiency mass transfer desulfurization tower proposed by the present invention is shown in FIG. Figure 2 ; Figure 4 This is a top-down perspective view of a high-efficiency mass transfer desulfurization tower proposed by the present invention; Figure 5 A schematic diagram of the internal structure of a high-efficiency mass transfer desulfurization tower proposed by the present invention; Figure 6 for Figure 5 A partial enlarged view of point B in the middle; Figure 7 A bottom view of a dynamic mass transfer efficiency enhancement mechanism of a high-efficiency mass transfer desulfurization tower proposed by the present invention; Figure 8 A top view of a dynamic mass transfer efficiency enhancement mechanism of a high-efficiency mass transfer desulfurization tower proposed by the present invention; Fig. 9 for Figure 2 A partial enlarged view of the middle part; Fig.10 This is a schematic structural diagram of an atomizing spray mechanism for a high-efficiency mass transfer desulfurization tower proposed by the present invention.

[0015] Among them, 1. desulfurization tower, 2. air inlet pipe, 21. venturi tube, 3. exhaust pipe, 4. slurry pool, 5. air flow transmission power mechanism, 51. central shaft, 52. impeller, 6. dynamic mass transfer efficiency enhancement mechanism, 61. outer gear ring, 62. drive gear, 63. transmission gear, 64. inner swirl disk, 65. outer swirl disk, 66. support plate, 67. connecting rod, 7. atomizing spray mechanism, 71. annular spray pipe, 72. atomizing nozzle, 73. conveying pipe, 8. demister, 9 , compressed gas injection forced oxidation mechanism, 91, reciprocating motion component, 911, piston cylinder one, 912, semicircular gear, 913, movable gear ring, 914, fixed support plate, 92, air compression component, 921, piston cylinder two, 922, annular air pipe, 923, nozzle, 924, air pipe one, 925, air supply pipe, 926, air pipe two, 927, one-way valve, 10, circulation pump, 101, circulation input pipe, 102, circulation output pipe, 11, stirring blade. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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 creative work are within the scope of protection of the present invention.

[0017] like Figure 1-Figure 10 As shown, a high-efficiency mass transfer desulfurization tower provided by the present invention comprises a desulfurization tower 1, an air inlet pipe 2 and an exhaust pipe 3, wherein the air inlet pipe 2 is connected to the bottom of one side of the desulfurization tower 1, and the exhaust pipe 3 is connected to the top of the other side of the desulfurization tower 1. A slurry pool 4 is arranged at the bottom of the desulfurization tower 1, and the slurry pool 4 stores an alkaline solution for neutralizing sulfur dioxide in the exhaust gas. An air flow transmission power mechanism 5, a dynamic mass transfer efficiency enhancement mechanism 6, an atomizing spray mechanism 7 and a demister 8 are arranged inside the desulfurization tower 1 from bottom to top. After the exhaust gas enters the desulfurization tower 1 from the air inlet pipe 2, it is guided by the dynamic mass transfer efficiency enhancement mechanism 6 to form a swirl state and rises, and the atomizing spray mechanism 7 mists the exhaust gas. The desulfurized slurry is sprayed out, allowing the slurry to rush towards the swirling rising exhaust gas in the form of high-speed, evenly dispersed fine droplets. When the two collide at high speed, a huge impact force is transmitted to the slurry droplets. Due to the uneven force, the large droplets begin to break. Due to the entrainment of the swirling airflow and the complex interference between the air waves, the liquid particles continue to collide and cut again and again. Each collision further crushes them into smaller particles. As the liquid particles become finer, their specific surface area increases exponentially, which means that a unit mass of slurry can provide more interfaces for contact and reaction with acidic gases such as sulfur dioxide in the exhaust gas. In the continuous collision, breakage, During the mixing process, the gas-liquid two phases reach a dynamic equilibrium state. The desulfurization tower 1 is provided with a compressed gas injection forced oxidation mechanism 9. During the operation of the desulfurization tower 1, the synchronously compressed conveying air enters the slurry in one direction, and the calcium sulfite generated by the reaction is forced to be oxidized into calcium sulfate. Calcium sulfate is easy to store and transport, and can be used as a raw material for the production of building materials. A venturi tube 21 is fixedly installed inside the air inlet pipe 2. The venturi tube 21 includes an inlet section, a contraction section and a throat. The throat of the venturi tube 21 is located at the connection between the air inlet pipe 2 and the desulfurization tower 1. The air flow transmission power mechanism 5 includes a central shaft 51 and an impeller 52. The bottom end of the central shaft 51 The rotor is arranged on the inner bottom wall of the desulfurization tower 1, and the top end of the central axis 51 rotates and penetrates the top wall of the desulfurization tower 1. The impeller 52 is fixedly sleeved on the central axis 51. The impeller 52 and the venturi tube 21 are located on the same horizontal line. The exhaust gas smoothly enters the venturi tube 21 through the intake pipe 2. According to the Venturi effect, the gas flow velocity in the throat of the venturi tube 21 increases and the static pressure decreases. When the exhaust gas flows out from the throat and enters the desulfurization tower 1, the high-speed flow of the gas generates an impact force on the impeller 52. Driven by the exhaust gas, the impeller 52 drives the central axis 51 to rotate together, thereby converting the kinetic energy of the exhaust gas into the rotational mechanical energy of the central axis 51.

[0018] The compressed gas injection forced oxidation mechanism 9 includes a reciprocating component 91 and an air compression component 92. The reciprocating component 91 is installed on the top wall of the desulfurization tower 1, and the air compression component 92 is installed on the outer wall of the desulfurization tower 1. The reciprocating component 91 and the air compression component 92 are connected and arranged. The reciprocating component 91 includes a piston cylinder 911, a semicircular gear 912 and a movable gear ring 913. A fixed support plate 914 is arranged on the top wall of the desulfurization tower 1. The fixed support plate 914 is arranged in two groups relatively. The piston cylinder 911 is arranged in two groups. The two groups of piston cylinders 911 are fixedly installed on the two groups of fixed support plates 914 respectively. The semicircular gear 912 is fixedly installed on the top of the central shaft 51. The movable gear ring 913 is fixedly connected to the two groups of piston cylinders 911. The movable gear ring 913 is located at the outer side of the semicircular gear 912 and meshed with the semicircular gear 912. The central shaft 51 drives the semicircular gear 912 to rotate, and the semicircular gear 912 causes the movable gear ring 913 to produce linear motion. The linear motion of the movable gear ring 913 can be directly transmitted to the piston cylinder 1 911, and the output end of the piston cylinder 1 911 performs reciprocating motion accordingly. The two groups of piston cylinders 1 911 perform alternate suction motions. The air compression assembly 92 includes a piston cylinder 2 921, an annular air pipe 922 and an injection head 923. The piston cylinder 2 921 is fixedly installed on the outer side wall of the desulfurization tower 1. The piston cylinder 2 921 is provided in two groups. The two groups of piston cylinders 2 921 are provided corresponding to the two groups of piston cylinders 1 911. There is an air pipe 924 connected between 21 and the piston cylinder 1 911, an air pipe 925 is connected at the bottom of the side wall of the piston cylinder 2 921, an annular air pipe 922 is fixed around the desulfurization tower 1 near the bottom, an air pipe 926 is connected between the annular air pipe 922 and the piston cylinder 2 921, a plurality of nozzles 923 are arranged in an annular array and penetrate the annular air pipe 922, the nozzles 923 penetrate the bottom of the side wall of the desulfurization tower 1, and a one-way valve 927 is arranged on the air pipe 925 and the air pipe 2 926. When the piston cylinder 1 911 in the reciprocating motion assembly 91 performs reciprocating motion under the drive of the semicircular gear 912, the pressure in the piston cylinder 2 921 is controlled by the air pipe 1 924. When the piston in the piston cylinder 2 921 is subjected to pressure, When moving upward, the outside air is drawn into the piston cylinder 921 through the air pipe 925. The one-way valve 927 on the air pipe 925 ensures that the air can only flow into the piston cylinder 921 in one direction and cannot flow out. When the piston in the piston cylinder 921 moves downward under pressure, the air is delivered to the annular air pipe 922 through the air pipe 926. The one-way valve 927 on the air pipe 926 ensures that the air can only flow from the piston cylinder 921 to the annular air pipe 922, preventing the air in the annular air pipe 922 from flowing back to the piston cylinder 921. The air is sprayed into the slurry inside the desulfurization tower 1 at a certain pressure through multiple nozzles 923, and the oxygen in the air reacts with the calcium sulfite to force the calcium sulfite to be oxidized into calcium sulfate.

[0019] The dynamic mass transfer efficiency enhancement mechanism 6 includes an outer gear ring 61, a driving gear 62, a transmission gear 63, an inner swirl disk 64 and an outer swirl disk 65. The outer gear ring 61 is rotatably arranged on the inner wall of the desulfurization tower 1, the driving gear 62 is fixedly sleeved on the central shaft 51, a support plate 66 is fixedly arranged on the inner wall of the desulfurization tower 1, and the transmission gear 63 is rotatably arranged on the support plate 66. The transmission gear 63 is located between the outer gear ring 61 and the driving gear 62. One side of the transmission gear 63 is meshed with the outer gear ring 61, and the other side of the transmission gear 63 is meshed with the driving gear 62. The inner swirl disk 64 is fixedly sleeved on the central shaft 51, and the outer swirl disk 65 is fixedly sleeved on the central shaft 51. A connecting rod 67 is fixedly connected to the bottom, and the connecting rod 67 is connected to the outer gear ring 61. The central shaft 51 drives the driving gear 62 and the inner swirl disk 64 to rotate, and the driving gear 62 drives the transmission gear 63 to rotate, and the transmission gear 63 drives the outer gear ring 61 to rotate. The outer gear ring 61 drives the outer swirl disk 65 to rotate through the connecting rod 67. The rotation direction of the outer swirl disk 65 is opposite to that of the inner swirl disk 64. The multi-scale swirls generated by the outer swirl disk 65 and the inner swirl disk 64 with different directions can break up large droplets and large bubbles in the exhaust gas and slurry, making the slurry droplets smaller and more uniform, and the gas dispersed more densely, thereby greatly increasing the gas-liquid contact area.

[0020] The blades on the inner swirl disk 64 have an inward curvature, and the curvature direction of the blades of the outer swirl disk 65 is opposite to that of the inner swirl disk 64. The inner swirl disk 64 is correspondingly arranged on the inner side of the outer swirl disk 65. Both the inner swirl disk 64 and the outer swirl disk 65 are arranged in multiple layers. When the inner swirl disk 64 rotates with the central axis 51, it can guide the gas-liquid mixture to converge to the central area, producing a centripetal swirl effect. When the outer swirl disk 65 rotates, the blades guide the gas-liquid mixture to diffuse outward, forming a complex, bidirectional swirl field between the inner swirl disk 64 and the outer swirl disk 65.

[0021] The atomizing spray mechanism 7 comprises an annular spray pipe 71 and an atomizing nozzle 72. The annular spray pipe 71 is provided with a plurality of groups. The plurality of annular spray pipes 71 are distributed in a stacked manner in the desulfurization tower 1. The plurality of annular spray pipes 71 gradually increase in size from bottom to top. The atomizing nozzle 72 is in an annular array and a plurality of groups are evenly installed under the annular spray pipe 71. A delivery pipe 73 is passed through the side wall of the desulfurization tower 1. The delivery pipe 73 is provided with a plurality of groups and is correspondingly connected to the plurality of annular spray pipes 71. A circulating pump 10 is fixedly installed on the outer wall of the desulfurization tower 1. A circulating input pipe 101 is connected to the inlet of the circulating pump 10. A filter screen is installed at the pipe mouth of the circulating input pipe 101. The inlet pipe 101 is connected to the slurry pool 4, and the outlet of the circulating pump 10 is connected to the circulating output pipe 102, which is connected to the delivery pipe 73. The circulating pump 10 extracts the slurry in the slurry pool 4 and delivers it to the annular spray pipe 71 through the circulating output pipe 102 and the delivery pipe 73. When the desulfurized slurry enters the annular spray pipe 71, it reaches the atomizing nozzle 72. Under the special structure and action of the nozzle, the slurry is dispersed into numerous tiny droplets. After being sprayed out, the slurry fully contacts and reacts with the exhaust gas and then falls back to the slurry pool 4, forming a circulation loop, so that the slurry can continue to participate in the desulfurization process and continuously treat the exhaust gas.

[0022] The demister 8 is rotatably mounted on the inner wall of the desulfurization tower 1. The demister 8 is fixedly sleeved on the central shaft 51. The demister 8 is located below the exhaust pipe 3. The bottom end of the central shaft 51 has a plurality of stirring blades 11 in a circular array. When the central shaft 51 rotates, the demister 8 and the stirring blades 11 rotate synchronously. The rotating demister 8 causes the exhaust gas to produce a rotating motion. The mist droplets are thrown to the edge of the demister 8 under the action of centrifugal force. At the same time, the structure of the demister 8 itself causes the mist droplets to collide with it. After the collision, the mist droplets gather into larger droplets. Due to the action of gravity, the mist droplets move along the demister. The surface of the mist collector 8 slides down to the slurry pool 4 at the bottom of the desulfurization tower 1, thereby achieving the purpose of removing droplets. Under the action of the rotating mist eliminator 8, the droplets are more easily thrown away from the airflow and captured. This dynamic mist removal method can effectively improve the mist removal efficiency and can remove droplets of smaller particle size. The stirring action of the stirring blade 11 on the slurry pool 4 enables the various components in the slurry to be fully mixed, which helps to maintain the uniform chemical activity of the slurry, so that the desulfurization reaction can be carried out efficiently in the entire slurry pool 4, avoiding the overall desulfurization effect being affected by incomplete local reactions.

[0023] When in use, a sufficient amount of slurry is transported to the slurry pool 4 inside the desulfurization tower 1, and the induced draft fan introduces the sulfur-containing exhaust gas into the desulfurization tower 1. The exhaust gas smoothly enters the venturi tube 21 through the air inlet pipe 2. According to the Venturi effect, the flow velocity of the gas in the throat of the venturi tube 21 increases and the static pressure decreases. When the exhaust gas flows out from the throat and enters the desulfurization tower 1, the high-speed flow of the gas generates an impact force on the impeller 52. Under the impetus of the exhaust gas, the impeller 52 drives the central shaft 51 to rotate together, thereby converting the kinetic energy of the exhaust gas into the rotational mechanical energy of the central shaft 51. As the central shaft 51 rotates, the driving gear 62 rotates synchronously with the central shaft 51, and transmits power to the transmission gear 63 by meshing with the transmission gear 63. The transmission gear 63 then drives the outer gear ring 61 to rotate on the inner wall of the desulfurization tower 1. The outer gear ring 61 drives the outer swirl disk 65 to rotate through the connecting rod 67. At the same time, the inner swirl disk 64 is fixedly sleeved on the central shaft 51 and also rotates with the central shaft 51. The outer swirl disk 65 rotates in opposite directions to the inner swirl disk 64. The outer swirl disk 65 and the inner swirl disk 64 with different directions cooperate with each other to produce a complex multi-scale swirl flow. This swirl flow can strongly break up large droplets and large bubbles in the exhaust gas and slurry, refine the slurry droplets, disperse the exhaust gas more densely, and greatly increase the gas-liquid contact area. At the same time, the circulating pump 10 is started, and the circulating pump 10 extracts the slurry in the slurry pool 4, and transports it to the annular spray pipe 71 through the circulating output pipe 102 and the delivery pipe 73. When the desulfurized slurry enters the annular spray pipe 71, it reaches the atomizing nozzle 72. Under the special structure and action of the nozzle, the slurry is dispersed into many tiny droplets. These high-speed, evenly dispersed tiny droplets rush towards the exhaust gas guided by the dynamic mass transfer enhancement mechanism 6 to rise in the swirl. The two collide at high speed. At the moment of collision, the huge impact force causes the large droplets to break, and then in the swirl, the large droplets are dispersed into a large number of droplets. Under the complex interference of the air flow and the air wave, the liquid particles collide and peel again and again, and are further crushed into finer particles. In this way, the unit mass of slurry can provide more interfaces for contact and reaction with acidic gases such as sulfur dioxide in the exhaust gas. The gas-liquid two phases reach a dynamic balance in the process of continuous collision, crushing and mixing, and the deep desulfurization reaction continues to proceed efficiently. After the ejected slurry fully contacts and reacts with the exhaust gas, it falls back to the slurry pool 4, forming a circulation loop, so that the slurry can continue to participate in the desulfurization process and continuously treat the exhaust gas; The waste gas after spraying continues to go up and reaches the demister 8. The central shaft 51 rotates and drives the demister 8 to rotate. The rotating demister 8 causes the waste gas to rotate. The mist droplets are thrown to the edge of the demister 8 under the action of centrifugal force, and collide with the structure of the demister 8 itself, gathering into larger droplets. Due to gravity, they slide along the surface of the demister 8 to the slurry pool 4 at the bottom of the desulfurization tower 1, effectively removing the mist droplets and preventing the mist droplets from carrying unreacted substances and being discharged. The waste gas after atomization and dust removal is discharged from the exhaust pipe 3; At the same time, the semicircular gear 912 at the top of the central shaft 51 also rotates with the central shaft 51. The rotation of the semicircular gear 912 causes the movable gear ring 913 to produce reciprocating motion, and the motion is directly transmitted to the piston cylinder 1 911, causing the output ends of the two groups of piston cylinders 1 911 to reciprocate accordingly. One group of piston cylinders 1 911 extracts gas from the piston cylinder 2 921 through the air pipe 1 924, so that the piston cylinder 2 921 extracts external air through the air pipe 925 due to the change in pressure. The one-way valve 927 on the air pipe 925 ensures that air can only flow into the piston cylinder 2 921 in one direction and cannot flow out therefrom, while the other group of piston cylinders 1 911 compresses gas into the piston cylinder 2 921 through the air pipe 1 924 , so that the piston cylinder 921 is subjected to the pressure change and transmits air to the annular air pipe 922 through the air pipe 926. The one-way valve 927 on the air pipe 926 ensures that the air can only flow from the piston cylinder 921 to the annular air pipe 922, and prevents the air in the annular air pipe 922 from flowing back to the piston cylinder 921. The air is sprayed into the slurry inside the desulfurization tower 1 through multiple nozzles 923 at a certain pressure. The oxygen in the air reacts with the calcium sulfite to force the calcium sulfite to be oxidized into calcium sulfate. The central shaft 51 drives the stirring blades 11 to stir the slurry pool 4, so that the various components in the slurry are fully mixed, the chemical activity of the slurry is kept uniform, and it is ensured that the desulfurization reaction is carried out efficiently in the entire slurry pool 4.

[0024] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A high-efficiency mass transfer desulfurization tower, comprising a desulfurization tower (1), an air inlet pipe (2) and an exhaust pipe (3), wherein the air inlet pipe (2) is connected to the bottom of one side of the desulfurization tower (1), and the exhaust pipe (3) is connected to the top of the other side of the desulfurization tower (1), and a slurry pool (4) is provided at the bottom of the desulfurization tower (1), characterized in that: The desulfurization tower (1) is provided with an air flow transmission power mechanism (5), a dynamic mass transfer efficiency enhancement mechanism (6), an atomizing spray mechanism (7) and a demister (8) from bottom to top. The desulfurization tower (1) is provided with a compressed air injection forced oxidation mechanism (9). A venturi tube (21) is fixedly installed inside the air inlet pipe (2). The air flow transmission power mechanism (5) comprises a central shaft (51) and an impeller (52). The bottom end of the central shaft (51) is rotatably arranged on the inner bottom wall of the desulfurization tower (1). The top end of the central shaft (51) is rotatably arranged on the inner bottom wall of the desulfurization tower (1). The impeller (52) is fixedly mounted on the central shaft (51) and is located on the same horizontal line as the venturi tube (21). The compressed air injection forced oxidation mechanism (9) comprises a reciprocating motion component (91) and an air compression component (92). The reciprocating motion component (91) is mounted on the top wall of the desulfurization tower (1), and the air compression component (92) is mounted on the outer wall of the desulfurization tower (1). The reciprocating motion component (91) and the air compression component (92) are connected to each other.

2. A high-efficiency mass transfer desulfurization tower according to claim 1, characterized in that: The reciprocating motion component (91) comprises a piston cylinder one (911), a semicircular gear (912) and a movable gear ring (913). A fixed support plate (914) is arranged on the top wall of the desulfurization tower (1). Two groups of the fixed support plates (914) are arranged opposite to each other. Two groups of the piston cylinder one (911) are arranged. The two groups of the piston cylinder one (911) are fixedly mounted on the two groups of fixed support plates (914) respectively. The semicircular gear (912) is fixedly mounted on the top of the central shaft (51). The movable gear ring (913) is fixedly connected between the output ends of the two groups of piston cylinders one (911). The movable gear ring (913) is located outside the semicircular gear (912) and is meshed with the semicircular gear (912).

3. A high-efficiency mass transfer desulfurization tower according to claim 2, characterized in that: The air compression assembly (92) comprises a second piston cylinder (921), an annular air pipe (922) and an air jet head (923). The second piston cylinder (921) is fixedly mounted on the outer wall of the desulfurization tower (1). The second piston cylinder (921) is provided in two groups. The two groups of the second piston cylinder (921) are provided correspondingly to the two groups of the first piston cylinder (911). An air pipe (924) is connected between the second piston cylinder (921) and the first piston cylinder (911). The second piston cylinder (921) The bottom of the side wall is connected to a gas pipe (925), the annular gas pipe (922) is fixedly surrounded near the bottom of the desulfurization tower (1), a second gas pipe (926) is connected between the annular gas pipe (922) and the second piston cylinder (921), a plurality of nozzles (923) are arranged in a circular array and pass through the annular gas pipe (922), the nozzles (923) pass through the bottom of the side wall of the desulfurization tower (1), and a one-way valve (927) is arranged on both the gas pipe (925) and the second gas pipe (926).

4. A high-efficiency mass transfer desulfurization tower according to claim 1, characterized in that: The dynamic mass transfer efficiency enhancement mechanism (6) comprises an outer gear ring (61), a driving gear (62), a transmission gear (63), an inner vortex disk (64) and an outer vortex disk (65); the outer gear ring (61) is rotatably mounted on the inner wall of the desulfurization tower (1); the driving gear (62) is fixedly sleeved on the central shaft (51); a support plate (66) is fixedly mounted on the inner wall of the desulfurization tower (1); and the transmission gear (63) is rotatably mounted on the support plate (66). The transmission gear (63) is located between the outer gear ring (61) and the driving gear (62); one side of the transmission gear (63) is meshed with the outer gear ring (61); the other side of the transmission gear (63) is meshed with the driving gear (62); the inner vortex disk (64) is fixedly sleeved on the central shaft (51); a connecting rod (67) is fixedly connected to the bottom of the outer vortex disk (65); and the connecting rod (67) is connected to the outer gear ring (61).

5. A high-efficiency mass transfer desulfurization tower according to claim 4, characterized in that: The inner vortex flow disk (64) is correspondingly arranged on the inner side of the outer vortex flow disk (65), and both the inner vortex flow disk (64) and the outer vortex flow disk (65) are arranged in multiple layers.

6. The high-efficiency mass transfer desulfurization tower according to claim 1, characterized in that: The atomizing spray mechanism (7) comprises an annular spray pipe (71) and an atomizing nozzle (72). The annular spray pipe (71) is provided in multiple groups. The multiple groups of annular spray pipes (71) are distributed in a stacked manner in the desulfurization tower (1). The atomizing nozzles (72) are arranged in an annular array and multiple groups are evenly installed under the annular spray pipe (71). A delivery pipe (73) passes through the side wall of the desulfurization tower (1). The delivery pipe (73) is provided in multiple groups and is correspondingly connected to the multiple groups of annular spray pipes (71).

7. A high-efficiency mass transfer desulfurization tower according to claim 6, characterized in that: A circulation pump (10) is fixedly mounted on the outer wall of the desulfurization tower (1); the inlet of the circulation pump (10) is connected to a circulation input pipe (101); a filter screen is installed at the pipe mouth of the circulation input pipe (101); the circulation input pipe (101) is connected to the slurry pool (4); the outlet of the circulation pump (10) is connected to a circulation output pipe (102); and the circulation output pipe (102) is in communication with the delivery pipe (73).

8. The high-efficiency mass transfer desulfurization tower according to claim 1, characterized in that: The demister (8) is rotatably mounted on the inner wall of the desulfurization tower (1), the demister (8) is fixedly sleeved on the central shaft (51), the demister (8) is located below the exhaust pipe (3), and a plurality of stirring blades (11) are provided in an annular array at the bottom end of the central shaft (51).

Images