Coal-fired flue gas dedusting and desulfurization system

Abstract

The present application provides a kind of coal-fired flue gas dust removal desulfurization system, belong to dust purification equipment technical field, including dust removal tower, desulfurization tower and discharge tower, the upper end of desulfurization tower is equipped with cover, discharge tower is connected with fan, the inside of desulfurization tower is equipped with spray pipe and concentration cover, further comprising: desulfurization component, desulfurization component is used for the removal of sulfide in flue gas;Support component, support component is used to promote the operation of desulfurization component;The present application has beneficial effect: the equipment is driven by the power of support component, so that aeration pipe rotates in desulfurization slurry and reciprocating moves up and down, and combines the design of conical heat-conducting rod, both can be dispersed into small airflow to expand contact area, and can break the bubble on the surface of slurry, promote slurry stirring, avoid local precipitation, improve primary desulfurization reaction efficiency, while the rotating dispersion effect of diffusion cylinder and the atomization of spray pipe are matched, realize the secondary full contact of flue gas and slurry, deeply remove sulfide.

Description

Technical Field

[0001] This invention relates to the field of dust removal and purification equipment technology, and more specifically, to a coal-fired flue gas dust removal and desulfurization system. Background Technology

[0002] The necessity of dust removal and desulfurization of coal-fired flue gas lies in reducing harmful gases such as sulfur dioxide and nitrogen oxides emitted during coal combustion, so as to reduce air pollution and protect the environment. Therefore, it is necessary to remove dust and desulfurize coal flue gas before it is released into the atmosphere to protect the atmospheric environment.

[0003] In existing desulfurization processes, flue gas is fed into the desulfurization tower through an inlet pipe. The flue gas rises due to its own buoyancy and mixes with the desulfurizing agent, which is then sprayed downwards. Since the two processes occur in opposite directions, the flue gas and desulfurizing agent cannot be completely mixed with the air. Furthermore, a long mixing time is required for complete desulfurization, affecting the efficiency of the desulfurization tower. Additionally, when the sprayed solution falls from above, it impacts the surface of the slurry at the bottom, trapping some flue gas (unreacted inert gases such as N2 or O2) within the slurry, forming bubbles. Simultaneously, as the flue gas flows upwards, some gas does not reach the surface... When reacting with the desulfurizing agent, the gas is carried into the bottom slurry by the falling slurry, further promoting the generation of bubbles. If the bubbles cannot break in time due to excessive slurry surface tension or too many impurities (such as dust in the flue gas or undissolved limestone particles), a stable foam layer will form on the slurry surface. If the foam layer is too thick, it will occupy the internal space of the absorption tower, increase the resistance to flue gas flow, lead to an increase in the load of the induced draft fan, and even affect the smoothness of flue gas emission. How to invent a coal-fired flue gas dust removal and desulfurization system to solve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0004] To overcome the above shortcomings, this invention provides a coal-fired flue gas dust removal and desulfurization system, which aims to solve the problems that the desulfurization process requires a long mixing time to achieve a full reaction, affecting the working efficiency of the desulfurization tower, and that when the spray solution falls from above, it impacts the bottom slurry surface, forming bubbles that may form a stable foam layer on the slurry surface, increasing the resistance to flue gas flow and affecting the smoothness of flue gas emission.

[0005] This invention is implemented as follows:

[0006] This invention provides a coal-fired flue gas dust removal and desulfurization system, including a dust removal tower, a desulfurization tower, and an emission tower. The upper end of the desulfurization tower is equipped with a cover, and the emission tower is connected to a fan. The interior of the desulfurization tower is equipped with spray pipes and a centralized hood. The system also includes:

[0007] A desulfurization component, located inside a desulfurization tower, is used to remove sulfides from flue gas.

[0008] A support assembly located inside the desulfurization tower, the support assembly being used to facilitate the operation of the desulfurization assembly.

[0009] Preferably, one end of the dust removal tower is fixedly connected to a vent pipe, the end of the vent pipe away from the dust removal tower is connected to the lower end of the desulfurization tower, the upper end of the desulfurization tower is detachably connected to the cover, and a demister is provided inside the cover, the demister being located above the spray pipe.

[0010] Preferably, the inner wall of the desulfurization tower is fixedly connected to a heat insulation cylinder, the inner wall of the heat insulation cylinder is fixedly connected to one end of the vent pipe, and the upper inner wall of the desulfurization tower is fixedly connected to a spray pipe and a centralized hood, with the centralized hood located below the spray pipe.

[0011] Preferably, the support assembly includes a support cylinder, which is T-shaped. One end of the support cylinder is fixedly connected to the heat insulation cylinder, and the other end of the support cylinder has an annular groove. A protective sleeve is fixedly connected to the side wall of the support cylinder, and a support ring is fixedly connected to the end of the protective sleeve away from the support cylinder. The inner wall of the groove is provided with a plurality of circumferentially arrayed return springs, and the two ends of the return springs are fixedly connected to the inner wall of the groove and the side wall of the support ring, respectively.

[0012] Preferably, the support assembly further includes a motor, which is fixed inside the heat insulation cylinder by a bracket. One end of the motor is fixedly connected to a rotating shaft, and a turbine blade is fixedly connected to the outer wall of the rotating shaft. The turbine blade is rotatably connected to the inner wall of the support cylinder, and a gear disk is fixedly connected to the end of the rotating shaft away from the motor.

[0013] Preferably, the desulfurization component includes a mounting base, the side wall of which is rotatably connected to a support ring, one end of which is slidably connected to the inner wall of a support cylinder, and a gear sleeve is fixedly connected to the inner wall of the mounting base, with the gear sleeve meshing with a gear disc.

[0014] Preferably, the desulfurization assembly further includes a diffuser and a collection cylinder. One end of the diffuser is fixedly connected to the collection cylinder, and the diffuser is located inside the collection cylinder. One end of the collection cylinder is fixedly connected to the end of the mounting base away from the support cylinder. The side wall of the diffuser is provided with a plurality of circumferentially arrayed exhaust holes.

[0015] Preferably, the outer wall of the collecting cylinder has a plurality of evenly distributed drainage grooves, which are wider at the top and narrower at the bottom. The bottom wall of the collecting cylinder has a plurality of air inlet grooves, which are connected to the inner wall of the diffuser. The outer wall of the collecting cylinder is slidably connected to the inner wall of one end of the concentrator.

[0016] Preferably, an air guide pipe is fixedly connected to the outer wall of the mounting base, and an extension cylinder is fixedly connected to the end of the air guide pipe away from the mounting base. Several evenly distributed aeration pipes are fixedly connected to the outer wall of the extension cylinder, and several arrayed heat-conducting rods are provided at the upper end of the aeration pipes. The heat-conducting rods are arranged in a conical shape.

[0017] Preferably, a conveying pipe is fixedly connected to the end of the cover away from the desulfurization tower, one end of the conveying pipe is fixedly connected to the fan, and one side of the fan is fixedly connected to the emission tower.

[0018] The beneficial effects of this invention are:

[0019] This equipment utilizes the power drive of the supporting components to rotate and reciprocate up and down within the desulfurization slurry. Combined with the design of the conical heat-conducting rod, it disperses the flue gas into fine airflows to increase the contact area, breaks up air bubbles on the slurry surface, promotes slurry agitation, avoids localized sedimentation, and improves the efficiency of the primary desulfurization reaction. Simultaneously, the rotational dispersion effect of the diffuser and the atomizing spray of the spray pipe work together to achieve secondary and thorough contact between the flue gas and the slurry, deeply removing sulfides. Furthermore, the collection hood's convergence of the sprayed slurry and the flow-limiting design of the collection cylinder's drain trough form an adaptive adjustment mechanism based on the slurry's own weight. A reset spring drives the mounting base to move up and down, dynamically adjusting the depth of the aeration pipe, balancing slurry circulation and reaction requirements, and reducing manual intervention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall front structure of a coal-fired flue gas dust removal and desulfurization system provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall rear structure of a coal-fired flue gas dust removal and desulfurization system provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the desulfurization tower of a coal-fired flue gas dust removal and desulfurization system provided by an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the desulfurization component and support component structure of a coal-fired flue gas dust removal and desulfurization system provided by an embodiment of the present invention;

[0025] Figure 5This is a schematic diagram of the aeration cylinder structure of a coal-fired flue gas dust removal and desulfurization system provided by an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the motor and shaft structure of a coal-fired flue gas dust removal and desulfurization system provided by an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the top structure of the support cylinder of a coal-fired flue gas dust removal and desulfurization system provided in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the bottom structure of the mounting base of a coal-fired flue gas dust removal and desulfurization system provided in an embodiment of the present invention;

[0029] Figure 9 This is a partial structural cross-sectional view of the mounting base, collecting cylinder, and diffuser of a coal-fired flue gas dust removal and desulfurization system provided in an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the bottom structure of the collection cylinder of a coal-fired flue gas dust removal and desulfurization system provided in an embodiment of the present invention;

[0031] Figure 11 This invention provides a coal-fired flue gas dust removal and desulfurization system. Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0032] Figure 12 This is a schematic diagram of a centralized hood structure for a coal-fired flue gas dust removal and desulfurization system provided in an embodiment of the present invention.

[0033] In the diagram: 1. Dust removal tower; 2. Ventilation pipe; 3. Desulfurization tower; 4. Cover; 41. Demister; 5. Conveying pipe; 6. Fan; 7. Discharge tower; 8. Spray pipe; 9. Centralized hood; 10. Desulfurization assembly; 101. Diffuser; 1011. Exhaust port; 102. Collection cylinder; 1021. Drainage trough hole; 1022. Air inlet trough; 103. Mounting base; 104. Air guide pipe; 1041. Extension cylinder; 1042. Heat conduction rod; 1043. Aeration pipe; 105. Gear sleeve; 11. Support assembly; 111. Motor; 112. Support cylinder; 113. Turbine fan blade; 114. Rotating shaft; 115. Gear disk; 116. Support ring; 117. Protective sleeve; 118. Groove; 119. Return spring; 12. Heat insulation cylinder. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] Reference Figures 1-12 A coal-fired flue gas dust removal and desulfurization system includes a dust removal tower 1, a desulfurization tower 3, and an emission tower 7. The upper end of the desulfurization tower 3 is equipped with a cover 4, and the emission tower 7 is connected to a fan 6. The interior of the desulfurization tower 3 is equipped with a spray pipe 8 and a centralized hood 9. The system also includes:

[0037] Desulfurization component 10 is located inside desulfurization tower 3 and is used to remove sulfides from flue gas.

[0038] Support component 11 is located inside the desulfurization tower 3 and is used to facilitate the operation of desulfurization component 10.

[0039] Furthermore, a ventilation pipe 2 is fixedly connected to one end of the dust removal tower 1, and the end of the ventilation pipe 2 away from the dust removal tower 1 is connected to the lower end of the desulfurization tower 3. The upper end of the desulfurization tower 3 is detachably connected to the cover 4. A demister 41 is provided inside the cover 4, and the demister 41 is located above the spray pipe 8. A heat insulation cylinder 12 is fixedly connected to the inner wall of the desulfurization tower 3, and the inner wall of the heat insulation cylinder 12 is fixedly connected to one end of the ventilation pipe 2. The upper inner wall of the desulfurization tower 3 is fixedly connected to the spray pipe 8 and the centralized cover 9, respectively. The centralized cover 9 is located below the spray pipe 8. A conveying pipe 5 is fixedly connected to the end of the cover 4 away from the desulfurization tower 3, and one end of the conveying pipe 5 is fixedly connected to the fan 6. One side of the fan 6 is fixedly connected to the discharge tower 7.

[0040] The overall operation process of the equipment: The flue gas generated by coal combustion first enters the dust removal tower 1. After the dust removal treatment removes most of the dust, the flue gas with improved cleanliness is transported to the lower end of the desulfurization tower 3 through the ventilation pipe 2 to start the desulfurization process. The heat insulation cylinder 12 on the inner wall of the desulfurization tower 3 can reduce the heat loss in the tower and provide a relatively stable temperature environment for the desulfurization reaction. The spray pipe 8 at the upper end of the desulfurization tower 3 will spray desulfurization slurry downwards, while the concentration hood 9 located below the spray pipe 8 can concentrate the sprayed slurry, so that the slurry can contact the flue gas more concentratedly.

[0041] Flue gas flows upward from the bottom of desulfurization tower 3 and undergoes primary desulfurization treatment with desulfurization slurry at the bottom of desulfurization tower 3 through desulfurization component 10. This allows the reacted gas to fully contact the desulfurization slurry sprayed from spray pipe 8 inside the tower, and remove sulfides from the flue gas through a chemical reaction, thus completing secondary desulfurization. Liquid droplets generated during the reaction will continue to rise with the flue gas. When they reach the demister 41 inside the cover 4, the droplets are intercepted to prevent the slurry from being carried out of desulfurization tower 3 with the flue gas, ensuring that the humidity of the flue gas in subsequent treatment is within a reasonable range.

[0042] After desulfurization and demisting, the clean flue gas is sent to the emission tower 7 through the conveying pipe 5 connected to the cover 4 and under the suction of the fan 6. Finally, the gas is discharged into the atmosphere after meeting the emission standards through the emission tower 7, so as to reduce air pollution and achieve the purification effect. In addition, the desulfurization tower 3 and the cover 4 are detachably connected, which facilitates the inspection and maintenance of components such as the spray pipe 8 and the demister 41 in the tower, ensuring the long-term stable operation of the system. Moreover, the electrical components in the equipment are all powered by an external power source.

[0043] Reference Figures 4-11 Furthermore, the support assembly 11 includes a support cylinder 112, which is T-shaped. One end of the support cylinder 112 is fixedly connected to the heat insulation cylinder 12, and the other end of the support cylinder 112 has an annular groove 118. A protective sleeve 117 is fixedly connected to the side wall of the support cylinder 112, and a support ring 116 is fixedly connected to the end of the protective sleeve 117 away from the support cylinder 112. The inner wall of the groove 118 is provided with a plurality of circumferentially arrayed return springs 119, and the two ends of the return springs 119 are fixedly connected to the inner wall of the groove 118 and the side wall of the support ring 116, respectively. The support assembly 11 also includes a motor 111, which is fixed inside the heat insulation cylinder 12 by a bracket. One end of the motor 111 is fixedly connected to a rotating shaft 114, and a turbine blade 113 is fixedly connected to the outer wall of the rotating shaft 114. The fan blade 113 is rotatably connected to the inner wall of the support cylinder 112, and the end of the rotating shaft 114 away from the motor 111 is fixedly connected to the gear disk 115; the desulfurization component 10 includes a mounting base 103, the side wall of the mounting base 103 is rotatably connected to the support ring 116, one end of the mounting base 103 is slidably connected to the inner wall of the support cylinder 112, and the inner wall of the mounting base 103 is fixedly connected to the gear sleeve 105, which meshes with the gear disk 115; the outer wall of the mounting base 103 is fixedly connected to the air guide pipe 104, and the end of the air guide pipe 104 away from the mounting base 103 is fixedly connected to the extension cylinder 1041, and the outer wall of the extension cylinder 1041 is fixedly connected to several evenly distributed aeration pipes 1043, and the upper end of the aeration pipe 1043 is provided with several arrayed heat-conducting rods 1042, which are conical in shape.

[0044] The support assembly 11 provides power to the desulfurization assembly 10: The motor 111 of the support assembly 11 is fixed inside the heat insulation cylinder 12 by a special bracket. The bracket is rigidly connected to the inner wall of the heat insulation cylinder 12 to ensure that the motor 111 will not be displaced due to vibration during operation, thus ensuring the stability of power transmission. When the equipment starts, the torque output by the motor 111 is completely transmitted to the turbine blade 113 through the rotating shaft 114, driving the turbine blade 113 to rotate stably within the inner wall cavity of the support cylinder 112. The blade design of the turbine blade 113 is adapted to the flue gas flow requirements. When rotating, it will form a significant negative pressure zone inside the support cylinder 112. The airflow thrust generated by the blade rotation reduces the air pressure on the side of the support cylinder 112 near the motor 111, thereby maintaining the pressure on the flue gas entering the desulfurization tower 3 through the ventilation pipe 2. Continuing the suction effect, this negative pressure drive breaks the limitation of traditional flue gas relying solely on its own buoyancy to rise. It can guide the flue gas to accelerate through the inner cavity of the support cylinder 112 and flow directionally into the gas channel inside the mounting base 103. This provides sufficient power for the subsequent diffusion of flue gas into the gas guide pipe 104 of the desulfurization component 10, ensuring that the flue gas does not stagnate at the bottom of the desulfurization tower 3. For flue gas treatment needs under different operating conditions, the motor 111 can be equipped with a speed regulator to adjust the speed. When treating high-concentration or high-resistance flue gas, the speed can be appropriately increased to enhance the negative pressure suction and accelerate the flue gas flow rate. When treating low-concentration flue gas, the speed can be reduced to reduce energy consumption, while avoiding insufficient gas-liquid contact time due to excessive flow rate. The addition of the speed regulator makes the power output more flexible and can adapt to diverse flue gas treatment scenarios.

[0045] While the rotating shaft 114 transmits power to the turbine fan blades 113, the gear disk 115 at its end also rotates synchronously with the rotating shaft 114. The gear disk 115 and the gear sleeve 105 on the inner wall of the mounting base 103 are designed for precise meshing. The meshing between the teeth ensures that the rotational force can be completely transmitted. The rotation of the gear disk 115 will drive the gear sleeve 105 to rotate through the meshing relationship, thereby driving the mounting base 103, which is fixed to the gear sleeve 105, to move together. The side wall of the mounting base 103 and the support ring 1 16 forms a stable rotational connection. The support ring 116 provides reliable rotational support for the mounting base 103, preventing the mounting base 103 from shifting or shaking during rotation and ensuring that the rotation trajectory remains stable. The rotational power of the mounting base 103 will be further transmitted to the air guide pipe 104 on its outer wall, driving the extension cylinder 1041 at the end of the air guide pipe 104 and the aeration pipe 1043 on the outer wall to rotate synchronously, so that the aeration pipe 1043 makes uniform circular motion in the desulfurization slurry at the bottom of the desulfurization tower 3.

[0046] To ensure the desulfurization effect of the aeration pipe 1043, the liquid level of the desulfurization slurry is specially controlled. The liquid level is lower than the lower end of the heat insulation cylinder 12, but higher than the heat-conducting rod 1042 at the bottom of the aeration pipe 1043. This ensures that the pores of the aeration pipe 1043 are completely submerged in the slurry. When the flue gas enters the aeration pipe 1043 through the air guide pipe 104 and the extension cylinder 1041, it will be torn into fine airflows under the action of rotation and sprayed evenly from the pores, making full contact with the surrounding desulfurization slurry, greatly improving the gas-liquid contact efficiency, and allowing the sulfides in the flue gas to be initially removed in this stage. The heat-conducting rod 1042 at the upper end of the aeration pipe 1043 adopts a conical design and is selected with excellent thermal conductivity. The material (such as copper alloy) plays a dual role in the desulfurization process. On the one hand, as the aeration pipe 1043 rotates, the conical tip of the heat-conducting rod 1042 can quickly break the bubbles generated by the reaction on the surface of the desulfurization slurry. If these bubbles are not dealt with in time, they are prone to accumulate and form a foam layer, which hinders the release of flue gas. The tip of the conical structure can efficiently destroy the liquid film of the bubbles, promote the rupture of the bubbles, and ensure that the flue gas can smoothly overflow the slurry. On the other hand, the heat-conducting rod 1042 can absorb the heat of the flue gas and the internal environment of the desulfurization tower 3, and transfer the heat to the surrounding slurry, appropriately increase the slurry temperature, create more suitable temperature conditions for the desulfurization reaction, accelerate the reaction rate, and further enhance the primary desulfurization effect.

[0047] The return spring 119 and protective sleeve 117 between the support ring 116 and the support cylinder 112 provide a stable guarantee for power transmission. The return spring 119 always maintains a certain elastic tension, which maintains the tight fit between the support ring 116 and the mounting base 103 through elasticity, reduces the shaking when the mounting base 103 rotates, and ensures that the meshing gap between the gear disk 115 and the gear sleeve 105 is stable, avoiding power transmission interruption or component wear due to abnormal gap. The protective sleeve 117 is made of corrosion-resistant material and completely covers the return spring 119 and the gear meshing area. It can effectively isolate the desulfurization slurry from direct contact with the spring, gear and other components, prevent corrosive substances in the slurry from causing component corrosion, or solid particles in the slurry from causing component blockage, ensure the stability and continuity of power transmission, and extend the service life of the components.

[0048] Example 2

[0049] Reference Figures 4-12Furthermore, the desulfurization assembly 10 also includes a diffuser 101 and a collection cylinder 102. One end of the diffuser 101 is fixedly connected to the collection cylinder 102, and the diffuser 101 is located inside the collection cylinder 102. One end of the collection cylinder 102 is fixedly connected to the end of the mounting base 103 away from the support cylinder 112. The side wall of the diffuser 101 is provided with a plurality of circumferentially arrayed exhaust holes 1011. The outer wall of the collection cylinder 102 is provided with a plurality of evenly distributed drain groove holes 1021. The drain groove holes 1021 are arranged in a shape that is wider at the top and narrower at the bottom. The bottom wall of the collection cylinder 102 is provided with a plurality of air inlet grooves 1022. The air inlet grooves 1022 are connected to the inner wall of the diffuser 101. The outer wall of the collection cylinder 102 is slidably connected to the inner wall of one end of the concentration hood 9.

[0050] The spray pipe 8 and the centralized hood 9 provide secondary desulfurization treatment for the flue gas: After primary desulfurization, the flue gas, carrying a small amount of unreacted sulfides, enters the diffuser 101 through the air inlet groove 1022 on the bottom wall of the collecting cylinder 102. At this time, the diffuser 101, which rotates synchronously with the mounting base 103, disperses the flue gas evenly into multiple fine airflows through the exhaust holes 1011 on its side wall. These airflows diffuse outwards under the action of centrifugal force, forming a wider coverage air mass, which facilitates the subsequent full contact with the sprayed slurry. The spray pipe 8, located above the diffuser 101, is connected to the desulfurization slurry pool at the bottom of the desulfurization tower 3 via an external water pump and pipeline. Fresh slurry is continuously pressurized and atomized from the nozzle. Since the flue gas is dispersed after diffusion, the slurry sprayed from the spray pipe 8 can more comprehensively cover each stream of air, achieving full contact between gas and liquid. The desulfurizing agent (such as limestone) in the slurry reacts chemically with the residual sulfides in the flue gas, further reducing the sulfur content in the flue gas and completing the secondary deep desulfurization.

[0051] The reacted slurry (containing reaction products and unreacted desulfurizing agent) flows downwards under gravity and is intercepted and collected by the concentrator 9 located below the spray pipe 8. The concentrator 9 has a funnel-shaped design, and the inclined angle of its inner wall guides the slurry to gather towards the center, eventually flowing into the collection cylinder 102. The drain channel 1021 on the outer wall of the collection cylinder 102 is the channel for slurry discharge, but its upper end is initially blocked by the lower edge of the concentrator 9, forming a structure similar to a "flow restrictor." At this time, the effective flow area of ​​the drain channel 1021 is reduced, and the slurry discharge rate is lower than the spraying rate of the spray pipe 8, resulting in some... As the slurry gradually accumulates in the collection cylinder 102, the weight of the slurry accumulated in the collection cylinder 102 increases, which will drive the mounting base 103 to move downward, compressing the reset spring 119 and the protective sleeve 117, thereby increasing the immersion depth of the aeration pipe 1043 in the desulfurization slurry at the lower end of the desulfurization tower 3. At this time, the contact range between the aeration pipe 1043 and the slurry expands, and the stirring effect on the slurry during rotation is stronger, which can more fully disperse the solid particles in the slurry (such as undissolved limestone, generated calcium sulfite, etc.), avoid local precipitation to form "dead zones", ensure uniform slurry concentration, and improve the efficiency of the primary desulfurization reaction.

[0052] When the slurry is discharged from the drain hole 1021 and the weight of the collection cylinder 102 is reduced, the elastic force of the return spring 119 will push the mounting base 103 upward, causing the aeration pipe 1043 to rise in the slurry and reduce the immersion depth. This upward movement can change the flow trajectory of the slurry, promote the convective mixing of the bottom slurry and the upper slurry, further enhance the overall uniformity of the slurry, and at the same time avoid the aeration pipe 1043 from local wear aggravation caused by long-term deep immersion. This feedback adjustment mechanism achieved by the slurry's own weight not only ensures the full reaction between the slurry and flue gas in the secondary desulfurization process, but also enables the aeration pipe 1043 to enhance stirring and expand the gas-liquid contact area during deep immersion, and promote slurry circulation during ascent. Combined with its own rotational motion, it forms a multi-dimensional slurry disturbance effect, effectively improving the utilization rate of the desulfurizing agent and the fullness of the primary desulfurization reaction. At the same time, through the adaptive adjustment of the mechanical structure, manual intervention is reduced and the stability of system operation is ensured.

[0053] It should be noted that the specific model and specifications of the electrical components need to be selected and determined based on the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, so they will not be described in detail here.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A coal-fired flue gas dust removal and desulfurization system, comprising a dust removal tower (1), a desulfurization tower (3), and an emission tower (7), wherein the upper end of the desulfurization tower (3) is provided with a cover (4), and the emission tower (7) is connected to a fan (6), characterized in that, The desulfurization tower (3) is equipped with a spray pipe (8) and a central hood (9) inside, and also includes: A desulfurization component (10) is located inside the desulfurization tower (3) and is used to remove sulfides from the flue gas. A support assembly (11) is located inside the desulfurization tower (3) and is used to facilitate the operation of the desulfurization assembly (10). One end of the dust removal tower (1) is fixedly connected to a ventilation pipe (2). The end of the ventilation pipe (2) away from the dust removal tower (1) is connected to the lower end of the desulfurization tower (3). The upper end of the desulfurization tower (3) is detachably connected to the cover (4). The cover (4) is equipped with a demister (41) inside. The demister (41) is located above the spray pipe (8). The inner wall of the desulfurization tower (3) is fixedly connected to a heat insulation cylinder (12), the inner wall of the heat insulation cylinder (12) is fixedly connected to one end of the ventilation pipe (2), the upper inner wall of the desulfurization tower (3) is fixedly connected to the spray pipe (8) and the centralized cover (9) respectively, and the centralized cover (9) is located below the spray pipe (8). The support assembly (11) includes a support cylinder (112), which is T-shaped. One end of the support cylinder (112) is fixedly connected to the heat insulation cylinder (12), and the other end of the support cylinder (112) is provided with an annular groove (118). A protective sleeve (117) is fixedly connected to the side wall of the support cylinder (112), and a support ring (116) is fixedly connected to the end of the protective sleeve (117) away from the support cylinder (112). The inner wall of the groove (118) is provided with a plurality of circumferentially arrayed return springs (119), and the two ends of the return springs (119) are fixedly connected to the inner wall of the groove (118) and the side wall of the support ring (116), respectively. The support assembly (11) also includes a motor (111), which is fixed inside the heat insulation cylinder (12) by a bracket. One end of the motor (111) is fixedly connected to a rotating shaft (114), and a turbine blade (113) is fixedly connected to the outer wall of the rotating shaft (114). The turbine blade (113) is rotatably connected to the inner wall of the support cylinder (112). A gear disk (115) is fixedly connected to the end of the rotating shaft (114) away from the motor (111). The desulfurization component (10) includes a mounting base (103), the side wall of the mounting base (103) is rotatably connected to a support ring (116), one end of the mounting base (103) is slidably connected to the inner wall of a support cylinder (112), and a gear sleeve (105) is fixedly connected to the inner wall of the mounting base (103), and the gear sleeve (105) is meshed with a gear disk (115). The desulfurization assembly (10) further includes a diffuser (101) and a collection cylinder (102). One end of the diffuser (101) is fixedly connected to the collection cylinder (102). The diffuser (101) is located inside the collection cylinder (102). One end of the collection cylinder (102) is fixedly connected to the end of the mounting base (103) away from the support cylinder (112). The side wall of the diffuser (101) is provided with a plurality of circumferentially arrayed exhaust holes (1011). The outer wall of the collecting cylinder (102) is provided with a number of evenly distributed drainage grooves (1021), which are wider at the top and narrower at the bottom. The bottom wall of the collecting cylinder (102) is provided with a number of air inlet grooves (1022), which are connected to the inner wall of the diffuser (101). The outer wall of the collecting cylinder (102) is slidably connected to the inner wall of one end of the concentrator (9). An air guide pipe (104) is fixedly connected to the outer wall of the mounting base (103). An extension cylinder (1041) is fixedly connected to one end of the air guide pipe (104) away from the mounting base (103). A number of evenly distributed aeration pipes (1043) are fixedly connected to the outer wall of the extension cylinder (1041). A number of arrayed heat-conducting rods (1042) are provided at the upper end of the aeration pipes (1043). The heat-conducting rods (1042) are arranged in a conical shape.

2. The flue gas dust removal and desulfurization system according to claim 1, characterized in that, The end of the cover (4) away from the desulfurization tower (3) is fixedly connected to a conveying pipe (5), one end of the conveying pipe (5) is fixedly connected to a fan (6), and one side of the fan (6) is fixedly connected to an emission tower (7).

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