Efficient kiln tail gas desulfurization structure

Abstract

The application discloses a kiln tail flue gas efficient desulfurization structure and relates to the technical field of kiln tail flue gas desulfurization. The kiln tail flue gas efficient desulfurization structure comprises a desulfurization tower, an air inlet flue communicated with the left part of the desulfurization tower and an air outlet flue communicated with the upper part of the desulfurization tower, and a multi-dimensional spraying part is arranged on the desulfurization tower and used for adjusting the longitudinal and radial spraying range of desulfurization water agent according to the concentration and flow rate of kiln tail flue gas; a ring sleeve is fixedly connected to the inner ring pipe; a plurality of fixed arc baffles are fixedly connected to the upper part of the inner ring pipe at equal intervals in the circumferential direction; a plurality of movable arc baffles used for cooperating with the fixed arc baffles are fixedly connected to the outer wall of the sliding sleeve at equal intervals in the circumferential direction. The application temporarily stops the flue gas through the layered interception part, prolongs the contact time of the flue gas with atomized desulfurization water agent, improves the SO2 absorption efficiency, realizes full coverage spraying of the desulfurization water agent in the flue through the multi-dimensional spraying part, and dynamically adjusts the spraying range according to the concentration and flow rate of the flue gas, thereby realizing efficient desulfurization.

Description

Technical Field

[0001] This invention relates to the field of kiln tail flue gas desulfurization technology, specifically to a high-efficiency desulfurization structure for kiln tail flue gas. Background Technology

[0002] Kiln tail gas is the high-temperature waste gas discharged from the tail of the rotary kiln during the new dry process cement production. It mainly consists of gases generated from fuel combustion, gases released during the high-temperature decomposition of raw materials, and some dust carried along with the gas. It is one of the most significant sources of pollutants in cement kiln systems. This flue gas has a complex composition, typically high temperature, and contains high concentrations of sulfur dioxide (SO2) and nitrogen oxides (NOx). x It contains a variety of pollutants such as sulfur, carbon dioxide (CO2), and dust. Among them, SO2 mainly comes from the pyrolysis of sulfur in raw materials and the combustion of sulfur in fuel. In particular, when the sulfur content of raw materials such as limestone is high, the SO2 concentration in flue gas will increase significantly, leading to excessive emissions.

[0003] Most commonly used desulfurization methods currently employ a gas-liquid reaction pathway. A desulfurization cylinder is installed in the desulfurization system, and a specially formulated desulfurizing agent is evenly sprayed into the high-speed flowing sulfur-containing flue gas through atomizing nozzles. The alkaline substances in the desulfurizing agent neutralize SO2 to generate products in the form of sulfates or sulfites, thereby achieving flue gas purification.

[0004] However, in actual operation, due to the high flow rate and short residence time of flue gas in the desulfurization cylinder, the atomized desulfurizing agent is quickly carried out of the system before it has fully contacted and mixed with the flue gas, resulting in incomplete absorption of SO2 and a significant reduction in desulfurization efficiency. On the other hand, the spray angle and atomization coverage of traditional atomizing nozzles are limited. When the flue gas velocity is high or the SO2 concentration fluctuates greatly, the spray area cannot effectively cover the entire cross-section of the flue, resulting in some flue gas "passing through" the reaction zone and being discharged without fully reacting with the desulfurizing agent. Although there are ways to increase the contact area with SO2 by increasing the nozzle spray angle or using staggered nozzles, the spray range cannot be dynamically adjusted when the flue gas velocity is high or low. There are still structural defects such as uneven mixing of desulfurizing agent and flue gas, incomplete reaction, and low utilization rate, making it difficult to stably achieve efficient desulfurization. Summary of the Invention

[0005] This invention provides a high-efficiency desulfurization structure for kiln tail flue gas, solving the technical problems of insufficient contact and mixing between atomized desulfurizing agent and flue gas due to the high flow rate and short residence time of flue gas in the desulfurization cylinder, resulting in incomplete SO2 absorption and reduced desulfurization efficiency; and the fixed and limited coverage of traditional nozzles, which cannot cover the entire flue cross section, especially when the flue gas velocity is high or the sulfur concentration fluctuates, leading to the phenomenon that some flue gas is discharged without reacting with the desulfurizing agent, resulting in incomplete reaction, low utilization rate, and difficulty in achieving stable and efficient desulfurization.

[0006] This invention provides a high-efficiency desulfurization structure for kiln tail flue gas, including a desulfurization tower, an inlet flue connected to the left side of the desulfurization tower, and an exhaust flue connected to the upper part of the desulfurization tower. The desulfurization tower is equipped with a multi-dimensional spraying section for adjusting the longitudinal and radial spraying range of the desulfurizing agent according to the concentration and flow rate of the kiln tail flue gas. The multi-dimensional spraying section includes several longitudinal spraying units located in the desulfurization tower and distributed at equal intervals. The desulfurization tower is also equipped with a layered interception section for multi-stage interception of the kiln tail flue gas to ensure sufficient combination and reaction between the desulfurizing agent and the kiln tail flue gas. The layered interception section includes: a through-hole rotatably connected to... The desulfurization tower consists of a rotating shaft on the upper wall panel, a drive motor fixedly connected to the upper surface of the desulfurization tower via a connecting frame and driven by the rotating shaft, a prism fixedly connected to the lower end of the rotating shaft, and several sliding sleeves equidistantly slidably connected to the outside of the prism and corresponding to the longitudinal spraying units. The longitudinal spraying unit includes an inner ring tube that is slidably sleeved outside the prism. A ring sleeve is fixedly connected to the inner ring tube, and the sliding sleeve is rotatably connected to the inner wall of the ring sleeve. Several fixed arc-shaped baffles are fixedly connected circumferentially at equal intervals on the upper part of the inner ring tube, and several movable arc-shaped baffles for cooperating with the fixed arc-shaped baffles are fixedly connected circumferentially at equal intervals on the outer wall of the sliding sleeve.

[0007] In one possible implementation, the multi-dimensional spraying unit further includes a spacing adjustment unit installed on the desulfurization tower. The longitudinal spraying unit is installed on the spacing adjustment unit, which is used to adjust the spacing between adjacent longitudinal spraying units in order to adjust the longitudinal spraying range of the desulfurization agent. A radial spraying unit for spraying the desulfurization agent along the radial direction of the desulfurization tower is provided between the longitudinal spraying unit and the desulfurization tower. An injection unit for introducing the desulfurization agent into the longitudinal spraying unit and the radial spraying unit is provided on the desulfurization tower.

[0008] In one possible implementation, the adjustment unit includes two symmetrically arranged mounting slots on the desulfurization tower. A screw is rotatably connected to the bottom of the mounting slot, and a threaded sleeve is threaded to the outside of the screw. A scissor-type telescopic frame is hinged between the threaded sleeve and the mounting slot.

[0009] In one possible implementation, the longitudinal spraying unit further includes an outer ring pipe hinged between two scissor-type telescopic frames. The outer ring pipe is circumferentially connected to several branch pipes that are radially distributed along the desulfurization tower. The end of the branch pipe away from the outer ring pipe is connected to the inner ring pipe. Several nozzle groups are circumferentially connected to the outside of the branch pipe along its own axial direction.

[0010] In one possible implementation, the radial spray unit includes several circumferentially equidistant strip grooves opened on the inner wall of the desulfurization tower. A vertical pipe is fixedly connected to the bottom of the strip grooves. Several spray holes are equidistantly opened along the axial direction on the outer wall of the vertical pipe, and the spray holes face the outer ring pipe. A sliding sleeve that is slidably sleeved outside the vertical pipe is fixedly connected to the outer wall of the outer ring pipe. A pipe sleeve that is slidably sleeved outside the vertical pipe is fixedly connected to the upper end of the sliding sleeve located at the upper part.

[0011] In one possible implementation, the injection unit includes an embedding groove formed on the inner wall of the desulfurization tower, a telescopic hose fixedly connected to the bottom of the embedding groove, the telescopic hose being connected to an outer ring pipe, an injection pipe fixedly connected to the desulfurization tower and communicating with the telescopic hose, an arc-shaped connecting pipe communicating with the outside of the injection pipe, and a connecting pipe penetrating the desulfurization tower communicating with the arc-shaped connecting pipe and the vertical pipe.

[0012] In one possible implementation, a reflux pipe is connected to the lower part of the outer wall of the desulfurization tower, the upper end of the reflux pipe is connected to the injection pipe, and a pump is installed outside the reflux pipe.

[0013] In one possible implementation, a pulley assembly is connected between the two screws for common transmission, and a second drive motor is fixedly connected to the upper end of the desulfurization tower and directly above one of the screws via a connecting plate. The output shaft of the second drive motor is fixedly connected to the upper end of the screw directly below it.

[0014] In one possible implementation, the corresponding moving arc-shaped baffle and fixed arc-shaped baffle are attached to each other on opposite sides, and the adjacent fixed arc-shaped baffles are staggered.

[0015] As can be seen from the above technical solutions, the present invention has the following advantages:

[0016] In this invention, by adding a layered interception section inside the desulfurization tower, and by using the intermittent cooperation of the moving arc-shaped baffle and the fixed arc-shaped baffle in each layer, the high-speed flowing kiln tail flue gas is briefly intercepted, effectively extending the residence time of the flue gas in the desulfurization reaction zone. This allows the atomized desulfurization agent to have sufficient time to fully contact, diffuse, and chemically react with the flue gas, thereby improving the SO2 capture rate, achieving more efficient desulfurization, and improving the desulfurization effect.

[0017] In this invention, the distance adjustment unit, longitudinal spray unit, and radial spray unit in the multi-dimensional spraying section work together to dynamically adjust the coverage of the sprayed desulfurizing agent in two dimensions: longitudinal (along the flue gas flow direction) and radial (perpendicular to the flue gas flow direction). This ensures that the atomized desulfurizing agent can form a uniformly distributed droplet cloud throughout the entire flue gas cross-section, achieving full coverage of the desulfurizing agent in the flue gas space. The spraying range can be expanded when the flue gas concentration is high and the flow rate is fast, while the spraying area can be narrowed when the concentration decreases or the flow rate slows down, avoiding excessive dosage and achieving on-demand desulfurization. This ensures that the flue gas and the desulfurizing agent are fully mixed, further improving the efficiency of desulfurization. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure for efficient desulfurization of kiln tail flue gas provided by the present invention.

[0020] Figure 2 This is a cross-sectional schematic diagram of the efficient desulfurization structure for kiln tail flue gas provided by the present invention.

[0021] Figure 3 This is a schematic diagram of the connection structure between the multi-dimensional spraying section and the layered interception section provided by the present invention.

[0022] Figure 4 This is a schematic diagram of the layered interception section provided by the present invention.

[0023] Figure 5 This is a schematic diagram of the installation structure of the injection unit provided by the present invention.

[0024] The above figures include the following reference numerals:

[0025] 1. Desulfurization tower; 2. Inlet flue; 3. Exhaust flue; 4. Multi-dimensional spraying unit; 41. Adjustable distance unit; 411. Mounting slot; 412. Screw; 413. Screw sleeve; 414. Scissor-type telescopic frame; 415. Pulley assembly; 416. Drive motor II; 42. Longitudinal spraying unit; 421. Outer ring pipe; 422. Branch pipe; 423. Inner ring pipe; 424. Nozzle assembly; 43. Radial spraying unit; 431. Strip 432. Groove; 433. Vertical pipe; 434. Spray hole; 435. Sliding sleeve; 44. Pipe sleeve; 45. Injection unit; 46. Embedded groove; 47. Telescopic hose; 48. Injection pipe; 49. Arc-shaped connecting pipe; 50. Layered interception section; 51. Rotating shaft; 52. Drive motor one; 53. Prism shaft; 54. Sliding sleeve; 55. Ring sleeve; 56. Fixed arc-shaped baffle; 57. Moving arc-shaped baffle; 6. Return pipe. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Please see Figure 1 and Figure 2 This invention provides a technical solution: a high-efficiency desulfurization structure for kiln tail flue gas, including a desulfurization tower 1, an inlet flue 2 connected to the left side of the desulfurization tower 1, and an exhaust flue 3 connected to the upper part of the desulfurization tower 1. A drain pipe is connected to the lower right side of the desulfurization tower 1. After desulfurization, the desulfurizing agent in the inner cavity of the desulfurization tower 1 is discharged through the drain pipe. The desulfurization tower 1 is equipped with a multi-dimensional spraying unit 4 for adjusting the longitudinal and radial spraying range of the desulfurizing agent according to the concentration and flow rate of the kiln tail flue gas. The multi-dimensional spraying unit 4 includes an adjustment unit 41 installed on the desulfurization tower 1. Several longitudinal spraying units 42 are installed at equal intervals on the Yuan 41. The spacing adjustment unit 41 is used to adjust the spacing between adjacent longitudinal spraying units 42 in order to adjust the longitudinal spraying range of the desulfurization agent. The longitudinal spraying units 42 and the desulfurization tower 1 are jointly provided with a radial spraying unit 43 for spraying the desulfurization agent in the radial direction of the desulfurization tower 1. The desulfurization tower 1 is provided with an injection unit 44 for passing the desulfurization agent into the longitudinal spraying unit 42 and the radial spraying unit 43. The desulfurization tower 1 is provided with a layered interception section 5 for multi-stage interception of kiln tail flue gas to ensure that the desulfurization agent and the kiln tail flue gas are fully combined and reacted.

[0028] Please see Figure 1 , Figure 2 and Figure 3In this embodiment, the adjusting unit 41 includes two symmetrically arranged mounting slots 411 on the desulfurization tower 1, and the mounting slots 411 are distributed along the axial direction of the desulfurization tower. A screw 412 is rotatably connected to the bottom of the mounting slot 411. A screw sleeve 413 is threadedly connected to the outside of the screw 412. A scissor-type telescopic frame 414 is hinged between the screw sleeve 413 and the mounting slot 411. A pulley assembly 415 is driven between the two screws 412. A second drive motor 416 is fixedly connected to the upper end face of the desulfurization tower 1 and directly above one of the screws 412 through a connecting plate. The output shaft of the second drive motor 416 is fixedly connected to the upper end of the screw 412 directly below it.

[0029] Please see Figure 2 and Figure 4 The longitudinal spraying unit 42 includes an outer ring pipe 421 hinged between two scissor telescopic frames 414. The outer ring pipe 421 is circumferentially connected to several branch pipes 422 that are radially distributed along the desulfurization tower 1. The end of the branch pipes 422 away from the outer ring pipe 421 is connected to an inner ring pipe 423. Several nozzle groups 424 are equidistantly connected to the outside of the branch pipes 422 along their own axial direction.

[0030] Please see Figure 2 , Figure 4 and Figure 5 The radial spray unit 43 includes several circumferentially equidistant strip grooves 431 on the inner wall of the desulfurization tower 1. A vertical pipe 432 is fixedly connected to the bottom of the strip grooves 431. Several spray holes 433 are equidistantly opened along the axial direction on the outer wall of the vertical pipe 432, and the spray holes 433 face the outer ring pipe 421. A sliding sleeve 434 is fixedly connected to the outer wall of the outer ring pipe 421 and is slidably sleeved outside the vertical pipe 432. A pipe sleeve 435 is fixedly connected to the upper end of the sliding sleeve 434 and is slidably sleeved outside the vertical pipe 432.

[0031] Please see Figure 1 , Figure 2 and Figure 5 The injection unit 44 includes an embedded groove 441 on the inner wall of the desulfurization tower 1. A telescopic hose 442 is fixedly connected to the bottom of the embedded groove 441. The telescopic hose 442 is connected to the outer ring pipe 421. An injection pipe 443 connected to the telescopic hose 442 is fixedly connected to the desulfurization tower 1. An arc-shaped connecting pipe 444 is connected to the outside of the injection pipe 443. The arc-shaped connecting pipe 444 and the vertical pipe 432 are connected by a connecting pipe that penetrates the desulfurization tower 1. A return pipe 6 is connected to the lower part of the outer wall of the desulfurization tower 1. The upper end of the return pipe 6 is connected to the injection pipe 443. A pump is installed outside the return pipe 6.

[0032] The control drive motor 416 drives one of the screws 412 to rotate. The driven screw 412 then drives the other screw 412 to rotate via the pulley assembly 415, making the two screws 412 rotate synchronously. The rotation of the screw 412 then drives the screw sleeve 413 to move upward. The screw sleeve 413 then drives the scissor telescopic frame 414 to move up and down and extend. The scissor telescopic frame 414 then drives the outer ring tube 421 to move upward, increasing the distance between the two adjacent outer ring tubes 421, thereby indirectly adjusting the longitudinal spray of the nozzle assembly 424. The spraying range is adjusted by the longitudinal movement of the outer ring pipe 421, which in turn drives the sliding sleeve 434 to slide outside the vertical pipe 432. As the sliding sleeve 434 moves upward, the longitudinal distance between them increases. The upper sliding sleeve 434 then drives the pipe sleeve 435 to move upward, exposing the spray holes 433 located at the lower part of the pipe sleeve 435 in the vertical pipe 432. This indirectly adjusts the number of spray holes 433 between two adjacent outer ring pipes 421 and also adjusts the radial spraying range of the spray holes 433, thereby flexibly adjusting the spraying range according to the concentration and flow rate of the incoming flue gas.

[0033] The outer ring pipe 421 moves longitudinally, which in turn drives the telescopic hose 442 to extend or shorten adaptively.

[0034] The flue gas is then introduced into the inlet flue duct 2, and then into the desulfurization tower 1, where it flows upwards. Simultaneously, the desulfurizing agent used in the desulfurization process is pumped into the injection pipe 443. The desulfurizing agent then enters the telescopic hose 442 and the arc-shaped connecting pipe 444. The desulfurizing agent in the telescopic hose 442 flows into the outer ring pipe 421, and then through the branch pipe 422 into the nozzle assembly 424, where it is atomized and sprayed downwards. The desulfurizing agent entering the arc-shaped connecting pipe 443... The desulfurizing agent in 44 flows into the vertical pipe 432 through the connecting pipe. The desulfurizing agent is pressed upward along the inner cavity of the vertical pipe 432 and then atomized and sprayed out from the spray hole 433 in the radial direction of the desulfurization tower 1. When the flue gas flows into the inner cavity of the desulfurization tower 1 to the area below the outer ring pipe 421, the desulfurizing agent sprayed from the top and radially mixes with the flue gas and reacts and neutralizes the sulfur dioxide in the flue gas. It can absorb sulfur dioxide from multiple dimensions and avoid the situation of insufficient desulfurization of flue gas.

[0035] The desulfurizing agent mixed with the flue gas accumulates downwards in the lower part of the inner cavity of the desulfurization tower 1. The external desulfurizing agent treatment system is connected to the return pipe, and then the pump can be controlled to operate. The pump pumps the desulfurizing agent that has fallen into the return pipe 6. The desulfurizing agent then passes through the desulfurizing agent treatment system for treatment and purification. The purified desulfurizing agent flows back into the injection pipe 443 from the return pipe 6 for reuse.

[0036] Please see Figure 2 , Figure 3 and Figure 4In this embodiment, the layered interception section 5 includes a rotating shaft 51 that is rotatably connected to the upper wall of the desulfurization tower 1, a drive motor 52 that is fixedly connected to the upper end face of the desulfurization tower 1 through a connecting frame and is pulsatorically connected to the rotating shaft 51, a prism shaft 53 that is fixedly connected to the lower end of the rotating shaft 51, and a plurality of sliding sleeves 54 that are equidistantly slidably connected to the outside of the prism shaft 53 and correspond one-to-one with the longitudinal spray unit 42. A ring sleeve 55 is fixedly connected to the inner ring pipe 423, and the sliding sleeve 54 is rotatably connected to the inner wall of the ring sleeve 55. A plurality of fixed arc-shaped baffles 56 are fixedly connected circumferentially at equal intervals on the upper part of the inner ring pipe 423. A plurality of movable arc-shaped baffles 57 that cooperate with the fixed arc-shaped baffles 56 are fixedly connected circumferentially at equal intervals on the outer wall of the sliding sleeve 54. The corresponding movable arc-shaped baffles 57 and fixed arc-shaped baffles 56 are mutually attached on opposite sides, and the upper and lower adjacent fixed arc-shaped baffles 56 are staggered.

[0037] The inner ring pipe 423 in the longitudinal spray unit 42 moves along with the longitudinal spacing adjustment of the outer ring pipe 421, while driving the ring sleeve 55 to move synchronously. The ring sleeve 55 then drives the sliding sleeve 54 to slide longitudinally outside the prism shaft 53. The sliding sleeve 54 and the ring sleeve 55 then drive the moving arc baffle 57 and the fixed arc baffle 56 to move longitudinally synchronously with the outer ring pipe 421, respectively.

[0038] The longitudinal spray unit 42 and the radial spray unit 43 operate to desulfurize the flue gas and simultaneously control the drive motor 52. The drive motor 52 then drives the prism shaft 53 to rotate intermittently via the rotating shaft 51. The prism shaft 53 then drives the sliding sleeve 54 to rotate intermittently. The sliding sleeve 54 then drives the moving arc-shaped baffle 57 to rotate intermittently. When the corresponding moving arc-shaped baffle 57 moves between two adjacent fixed arc-shaped baffles 56, the area above the outer ring pipe 421 is temporarily blocked. At this time, the flue gas is temporarily trapped below the outer ring pipe 421. When the movable arc-shaped baffle 57 rotates and coincides with the position directly above the fixed arc-shaped baffle 56, the flue gas can flow upward from the area between two adjacent fixed arc-shaped baffles 56 located on the same horizontal plane. Since the upper and lower adjacent fixed arc-shaped baffles 56 are staggered, the flue gas can stay briefly when flowing below each outer ring pipe 421, prolonging the mixing time between the desulfurization agent and the flue gas, ensuring that the sulfur dioxide in the flue gas can be fully absorbed by the desulfurization agent, and the desulfurized flue gas is discharged from the exhaust flue 3.

[0039] During operation, external flue gas is introduced into the inlet flue duct 2, and desulfurizing agent is pumped into the injection unit 44. The injection unit 44 then delivers the desulfurizing agent to the longitudinal spray unit 42 and the radial spray unit 43. After entering the inner cavity of the desulfurization tower 1, it flows upward. When it flows upward through the longitudinal spray unit 42, the longitudinal spray unit 42 and the radial spray unit 43 spray the desulfurizing agent from multiple dimensions. The longitudinal and radial spray ranges of the longitudinal spray unit 42 and the radial spray unit 43 can be adjusted by the pitch adjustment unit 41 according to the concentration and flow rate of the flue gas. At the same time, the operation of the stratified interception section 5 is controlled. The stratified interception section 5 intermittently intercepts the flue gas flowing through the longitudinal spray unit 42, prolonging the mixing time between the flue gas and the desulfurizing agent, ensuring that the sulfur dioxide in the flue gas is fully absorbed. Finally, the desulfurized flue gas is discharged from the exhaust flue duct 3.

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency desulfurization structure for kiln tail flue gas, comprising a desulfurization tower, an inlet flue connected to the left side of the desulfurization tower, and an exhaust flue connected to the upper part of the desulfurization tower, characterized in that: The desulfurization tower is equipped with a multi-dimensional spraying section for adjusting the longitudinal and radial spraying range of the desulfurization agent according to the concentration and flow rate of the kiln tail flue gas. The multi-dimensional spraying section includes several longitudinal spraying units located in the desulfurization tower and distributed at equal intervals. The desulfurization tower is also equipped with a layered interception section for multi-stage interception of the kiln tail flue gas to ensure that the desulfurization agent and the kiln tail flue gas fully combine and react. The layered interception section includes: a rotating shaft that is rotatably connected to the upper wall panel of the desulfurization tower; a drive motor that is fixedly connected to the upper end face of the desulfurization tower via a connecting frame and is connected to the rotating shaft; a prism fixedly connected to the lower end of the rotating shaft; and several sliding sleeves that are equidistantly slidably connected to the outside of the prism and correspond one-to-one with the longitudinal spraying unit. The longitudinal spraying unit includes an inner ring tube that is sleeved and slidably disposed outside the prism shaft; A ring sleeve is fixedly connected to the inner ring tube, and a sliding sleeve is rotatably connected to the inner wall of the ring sleeve. Several fixed arc-shaped baffles are fixedly connected at equal intervals around the upper part of the inner ring tube, and several movable arc-shaped baffles for cooperating with the fixed arc-shaped baffles are fixedly connected at equal intervals around the outer wall of the sliding sleeve. The multi-dimensional spraying unit also includes a spacing adjustment unit installed on the desulfurization tower. The longitudinal spraying unit is installed on the spacing adjustment unit. The spacing adjustment unit is used to adjust the distance between adjacent longitudinal spraying units in order to adjust the longitudinal spraying range of the desulfurization agent. The longitudinal spraying unit and the desulfurization tower are jointly provided with a radial spraying unit for spraying the desulfurization agent along the radial direction of the desulfurization tower. The desulfurization tower is provided with an injection unit for introducing the desulfurization agent into the longitudinal spraying unit and the radial spraying unit. The adjustable unit includes two symmetrically opened installation slots on the desulfurization tower. A screw is rotatably connected to the bottom of the installation slot. A screw sleeve is threaded to the outside of the screw. A scissor-type telescopic frame is hinged between the screw sleeve and the installation slot. The longitudinal spraying unit also includes an outer ring pipe hinged between two scissor telescopic frames. The outer ring pipe is circumferentially connected to several branch pipes that are radially distributed along the desulfurization tower. The end of the branch pipe away from the outer ring pipe is connected to the inner ring pipe. Several nozzle groups are circumferentially connected to the outside of the branch pipe along its own axial direction.

2. The efficient desulfurization structure for kiln tail flue gas according to claim 1, characterized in that: The radial spray unit includes several circumferentially equidistant strip grooves on the inner wall of the desulfurization tower. A vertical pipe is fixedly connected to the bottom of the strip groove. Several spray holes are equidistantly opened along the axial direction on the outer wall of the vertical pipe, and the spray holes face the outer ring pipe. A sliding sleeve is fixedly connected to the outer wall of the outer ring pipe and slidably sleeved outside the vertical pipe. A tube sleeve is fixedly connected to the upper end of the sliding sleeve located at the upper part of the vertical pipe.

3. The efficient desulfurization structure for kiln tail flue gas according to claim 2, characterized in that: The injection unit includes an embedding groove on the inner wall of the desulfurization tower. A telescopic hose is fixedly connected to the bottom of the embedding groove. The telescopic hose is connected to the outer ring pipe. An injection pipe connected to the telescopic hose is fixedly connected to the desulfurization tower. An arc-shaped connecting pipe is connected to the outside of the injection pipe. A connecting pipe penetrating the desulfurization tower is connected to the arc-shaped connecting pipe and the vertical pipe.

4. The efficient desulfurization structure for kiln tail flue gas according to claim 3, characterized in that: The lower part of the outer wall of the desulfurization tower is connected to a reflux pipe, the upper end of which is connected to the injection pipe, and a pump is installed outside the reflux pipe.

5. The efficient desulfurization structure for kiln tail flue gas according to claim 1, characterized in that: A pulley assembly is connected between the two screws for transmission. A second drive motor is fixedly connected to the upper end of the desulfurization tower and directly above one of the screws via a connecting plate. The output shaft of the second drive motor is fixedly connected to the upper end of the screw directly below it.

6. The efficient desulfurization structure for kiln tail flue gas according to claim 1, characterized in that: The corresponding moving arc-shaped baffle and fixed arc-shaped baffle are attached to each other on opposite sides, and the adjacent fixed arc-shaped baffles are staggered.

Images