Hazardous waste incineration flue gas deacidification device

Abstract

The present application relates to the field of flue gas treatment device, specifically is a kind of hazardous waste incineration flue gas deacidification device, including spray tower and the filler filled in spray tower, deacidification device further include the supporting mechanism of vertical partition arrangement to filler, and the cleaning mechanism of removing scale layer on filler, the present application uses the filler of partition arrangement and gradually reducing from bottom to top size increases gas-liquid contact area, flue gas enters spray tower initial stage with bottom filler fully contact and carries out rough deacidification, avoid the premature blockage caused by the rapid enrichment of dust and salt deposits due to too small gap;Subsequently, when flue gas contacts with small size filler, fine deacidification is carried out on residual acidic substances in flue gas, through the hierarchical processing mode from rough deacidification to fine deacidification from bottom to top, both ensure the final deacidification quality, and make the filler of each region be fully utilized, significantly prolong the continuous operation cycle, improve the efficiency of deacidification.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment devices, specifically a hazardous waste incineration flue gas deacidification device. Background Technology

[0002] The incineration of hazardous waste generates a large amount of high-temperature flue gas containing acidic gases such as HCl, SO2, and HF, as well as dust. This flue gas must undergo strict purification treatment to meet national environmental emission standards before it can be released into the atmosphere. Among many deacidification processes, packed spray towers have become one of the core equipment for deacidification treatment of hazardous waste incineration flue gas due to their advantages such as simple structure, stable operation, sufficient gas-liquid contact, and high purification efficiency.

[0003] During the desulfurization process, acidic flue gas enters from the bottom of the tower and forms a countercurrent contact with the alkaline absorbent sprayed from the top of the tower. As the flue gas rises through the packing layer, it comes into full contact with the absorbent on the surface of the packing. The acidic gas and the alkaline absorbent react to form harmless salts and water, thereby purifying the flue gas.

[0004] In the above process, the packing layer, with its large specific surface area, forms a uniform absorbent liquid film on its surface after being wetted by the spray layer, which greatly increases the gas-liquid contact area. At the same time, the packing layer effectively prolongs the gas-liquid residence time by increasing the complexity of the flue gas flow path, ensuring a more complete neutralization reaction and improving the deacidification efficiency.

[0005] Currently, the most commonly used packing material in spray towers is random packing. Among them, Pall rings are widely used due to their advantages such as large throughput, low resistance, high separation efficiency and high operational flexibility. Common nominal diameters of Pall rings include Φ25mm, Φ38mm, Φ50mm and Φ76mm. In engineering practice, a single specification of packing material is usually selected for filling to meet the deacidification requirements under the design conditions.

[0006] However, existing packed spray towers still have the following technical problems in practical engineering applications: 1. Traditional packed towers are usually filled with random packing of the same size throughout the entire tower. If a larger diameter packing is selected, although it can ensure a better throughput and a lower pressure drop and delay blockage, its specific surface area is relatively small, the gas-liquid contact is insufficient, and the overall deacidification quality is difficult to guarantee.

[0007] If a smaller diameter packing is used, although the specific surface area can be significantly increased and the deacidification efficiency can be improved, the dust carried by the flue gas and the salt deposits generated by the reaction are very easy to accumulate rapidly in the small gaps, causing the lower part of the packing layer to be blocked prematurely and the pressure drop to rise sharply. At this time, the upper part of the packing layer is not fully utilized, forcing the system to be shut down frequently for cleaning. This contradiction of "large size is inefficient and small size is easy to block" makes it difficult for the existing single diameter packing layer to meet the industrial requirements of efficient deacidification and stable operation in long-term operation.

[0008] 2. Hazardous waste incineration flue gas has a high dust content and complex composition. After the calcium and magnesium ions in the flue gas react with the deacidifying agent, they easily form a hard deposit scale layer on the surface of the packing. Actual measurement data shows that scaling can increase the pressure loss of the packing layer by 30%-50% and reduce the SO2 absorption rate by more than 20%. For the treatment of dusty flue gas, the existing packed towers usually need to be shut down once every 12 months to remove all the packing for manual or high-pressure water gun cleaning. This is not only cumbersome and labor-intensive, but also has a long cleaning cycle, which seriously affects the continuous operation time and overall economic benefits of the hazardous waste incineration system. Summary of the Invention

[0009] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a hazardous waste incineration flue gas desulfurization device, including a spray tower and packing material filled in the spray tower. The desulfurization device also includes a support mechanism for vertically partitioning the packing material and a cleaning mechanism for removing scale from the packing material.

[0010] The supporting mechanism includes a bottom grid, a middle grid, and a top grid that are slidably arranged in the spray tower from bottom to top. The size of the packing material scattered on the bottom grid, the middle grid, and the top grid decreases in sequence, so that the specific surface area of ​​the packing material gradually increases and the porosity gradually decreases from bottom to top.

[0011] The cleaning mechanism includes a turning component for turning over the packing material in each layer. The bottom grid, middle grid, and top grid are hollow and each has a nozzle on its upper side. When cleaning the scale layer, the nozzle sprays out cleaning liquid to backwash the packing material, and at the same time, the packing material is vibrated by a micro-vibration component installed on the spray tower.

[0012] The packing is arranged in zones to treat flue gas in stages and carry out acid removal operations in a high-quality and efficient manner. During the periodic backwashing of the packing, the packing is turned over and slightly vibrated to remove the scale layer on the packing online.

[0013] Preferably, the bottom grille has a horizontal structure, the middle grille has a conical structure with a larger diameter at the top and a smaller diameter at the bottom, and the top grille has a conical structure with a smaller diameter at the top and a larger diameter at the bottom.

[0014] Preferably, water guide pipes are provided on the outer sides of the bottom grid, middle grid, and top grid. The water guide pipes are radially sealed and slidably connected to the spray tower, and the water guide pipes are connected to the external liquid supply equipment.

[0015] Preferably, the packing material is a metal Pall ring, and the diameter of the packing material decreases sequentially from bottom to top.

[0016] Preferably, the micro-vibration assembly includes guide columns that are fixedly installed on the outside of the bottom grid, the middle grid, and the top grid, respectively, and the guide columns are radially sealed and slidably connected to the spray tower.

[0017] Preferably, the micro-vibration assembly further includes three electric cylinders fixedly installed on the outer surface of the spray tower, with the telescopic sections of the electric cylinders fixedly connected to guide columns at corresponding positions.

[0018] Preferably, the turning assembly includes a support frame fixedly installed inside the spray tower, a rotating cylinder is rotatably connected to the lower part of the support frame, and a plurality of turning rollers are rotatably connected to the rotating cylinder.

[0019] Preferably, several of the turning rollers are located on the upper side of the bottom grid, the middle grid, and the top grid, respectively, and a fixed shaft is fixedly installed inside the spray tower, with the fixed shaft sealed inside the rotating cylinder.

[0020] Preferably, a plurality of driven bevel gear discs are fixedly installed on the fixed shaft, and an active bevel gear is fixedly installed at one end of the turning roller located inside the rotating cylinder, the active bevel gear meshing with the driven bevel gear discs.

[0021] Preferably, a synchronous motor is fixedly installed on the support frame, and the output shaft of the synchronous motor is connected to the rotating drum through a belt drive structure.

[0022] The beneficial effects of this invention are as follows: First, this invention uses a partitioned arrangement of packing material with gradually decreasing size from bottom to top to increase the gas-liquid contact area. The flue gas enters the spray tower initially and comes into full contact with the bottom packing material, allowing high-concentration acidic substances in the flue gas to pass through quickly and undergo coarse deacidification. This avoids premature blockage caused by the rapid accumulation of dust and salt deposits due to excessively small gaps. Subsequently, when the flue gas comes into contact with the smaller-sized packing material, the specific surface area of ​​the packing material in that area significantly increases, enabling fine deacidification of residual acidic substances in the flue gas. Through this bottom-up, graded treatment mode from coarse to fine deacidification, the final deacidification quality is guaranteed, and the packing material in each area is fully utilized, significantly extending the continuous operation cycle and improving the deacidification efficiency.

[0023] Second, this invention uses bottom grids, middle grids, and top grids to support the packing material arranged in different zones. The bottom grid, middle grid, and top grids spray cleaning liquid through nozzles on them to backwash the packing material online. Loose deposits attached to the surface of the packing material can be removed without removing the packing material, which effectively reduces the frequency of downtime, reduces the labor intensity of manual cleaning, and further ensures the continuous and stable deacidification efficiency.

[0024] Third, this invention employs a micro-vibration component to drive the bottom, middle, and top grids to generate micro-amplitude vibrations during backwashing. This vibration energy is transmitted to each layer of packing material, causing relative displacement and collisions between the packing materials. Combined with a turning component, this forces the packing materials to turn over, causing the hard scale layer on the surface of the packing materials to crack and gradually peel off under the combined action of vibration stress and turning friction. This achieves online breaking and removal of the scale layer on the packing materials, improves the cleaning effect of backwashing, reduces the frequency of frequent shutdowns to remove the packing materials, and further improves the efficiency of acid removal.

[0025] Fourth, the present invention adopts a structural design with a horizontal bottom grid, a conical structure with a larger diameter at the top and a smaller diameter at the bottom in the middle grid, and a conical structure with a smaller diameter at the top and a larger diameter at the bottom in the top grid. This design allows the alkaline absorbent liquid sprayed down to diffuse outward along the conical surface when passing through the top grid, to gather inward along the conical surface after entering the middle grid, and to flow downward evenly when passing through the bottom grid. This effectively prolongs the movement path and residence time of the alkaline absorbent liquid in the spray tower, increases the contact opportunity between the alkaline absorbent liquid and the upward-flowing flue gas on the surface of each layer of packing, and makes the neutralization reaction more complete, thereby further improving the deacidification efficiency. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a partial cross-sectional view of the present invention;

[0029] Figure 3 This is a partial cross-sectional view of the bottom grid, middle grid, top grid and spray tower in this invention;

[0030] Figure 4 This is a partial cross-sectional view of the electric cylinder, guide column, spray tower and bottom grid in this invention;

[0031] Figure 5 This is a partial cross-sectional view of the rotating cylinder, the turning roller, the driven bevel gear disk, and the driving bevel gear in this invention.

[0032] In the diagram: 1. Spray tower; 2. Packing material; 3. Supporting mechanism; 4. Cleaning mechanism; 31. Bottom grid; 32. Middle grid; 33. Top grid; 41. Tilting assembly; 42. Micro-vibration assembly; 411. Support frame; 412. Rotating cylinder; 413. Tilting roller; 414. Fixed shaft; 415. Driven bevel gear disc; 416. Driving bevel gear; 417. Synchronous motor; 421. Guide column; 422. Electric cylinder. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0034] See Figure 1 and Figure 2 A hazardous waste incineration flue gas deacidification device includes a spray tower 1 and packing material 2 filled in the spray tower 1. The deacidification device also includes a support mechanism 3 for vertically partitioning the packing material 2, and a cleaning mechanism 4 for removing scale from the packing material 2.

[0035] When treating hazardous waste incineration flue gas for acid removal, the flue gas is continuously introduced into the lower inner part of the spray tower 1, so that the flue gas moves upward along the axial direction of the spray tower 1 under the action of wind pressure. At the same time, the spray tower 1 sprays alkaline absorbent downward, so that the alkaline absorbent flows through the packing 2 and forms a liquid film on the packing 2. When the flue gas passes through the support mechanism 3 and the packing 2 on it, the flue gas comes into contact with the liquid film on the packing 2 and reacts to carry out staged acid removal treatment, which not only ensures the quality of acid removal, but also makes full use of the packing 2 and improves the acid removal efficiency.

[0036] When the packing 2 performs acid removal treatment on the flue gas for a specified duration, the cleaning mechanism 4 performs online backwashing on the packing 2, and the packing 2 is broken up by vibration and agitation, thereby significantly extending the continuous operation time of the present invention, reducing the frequency of shutdown for cleaning the packing 2, and further improving the acid removal efficiency.

[0037] See Figure 1 , Figure 2 and Figure 3 The supporting mechanism 3 includes a bottom grid 31, a middle grid 32, and a top grid 33 that are arranged in sequence from bottom to top within the spray tower 1. The size of the packing material 2 scattered on the bottom grid 31, the middle grid 32, and the top grid 33 decreases in sequence, so that the specific surface area of ​​the packing material 2 gradually increases and the porosity gradually decreases from bottom to top.

[0038] When deacidifying the flue gas, the flue gas passes through the bottom grid 31, the middle grid 32 and the top grid 33 in sequence from bottom to top. This allows the flue gas to first come into contact with the large-sized packing material 2 on the bottom grid 31. Because the large-sized packing material 2 has a large porosity, the high-concentration acidic substances in the flue gas can pass through quickly and undergo coarse deacidification, avoiding premature blockage caused by the rapid accumulation of dust and salt deposits due to small pores.

[0039] Subsequently, the flue gas comes into contact with the medium-sized packing 2 on the central grid 32, allowing the acidic substances in the flue gas to further react with the alkaline absorbent liquid on the packing 2, thereby carrying out further deacidification treatment. Furthermore, due to the reduced size of the medium-sized packing 2, its porosity decreases and its specific surface area increases, which further increases the gas-liquid contact area when the flue gas passes through the medium-sized packing 2 area, ensuring the quality of deacidification.

[0040] The flue gas then continues to rise and comes into contact with the packing 2 on the top grid 33. The size of the small packing 2 is further reduced, its porosity is further reduced and its specific surface area is further increased, so that the alkaline absorbent film area on the small packing 2 is larger. When the flue gas passes through, the small amount of acidic substances remaining in the flue gas can fully contact the alkaline absorbent liquid, thereby performing fine deacidification and ensuring the quality of deacidification.

[0041] In summary, the bottom-up, graded deacidification process, from coarse to fine deacidification, not only ensures the final deacidification quality but also fully utilizes the packing material 2 in each zone. This avoids the clogging problem common in traditional deacidification methods, significantly extends the continuous operation cycle, and improves deacidification efficiency.

[0042] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The cleaning mechanism 4 includes a turning component 41 for turning over the packing 2 of each layer. The bottom grid 31, the middle grid 32, and the top grid 33 are hollow structures and each has a nozzle on the upper side. When cleaning the scale layer, the nozzle sprays out cleaning liquid to backwash the packing 2, and at the same time, the packing 2 is vibrated by the micro-vibration component 42 installed on the spray tower 1.

[0043] After the flue gas has been continuously deacidified for a specified time, flushing liquid is sprayed into the corresponding packing 2 area through the nozzles on the bottom grid 31, middle grid 32 and top grid 33, respectively, so as to perform online backwashing of the packing 2 without stopping the machine. In this embodiment, the backwashing pressure is 0.3-0.6 MPa, thereby flushing away the scale layer on the packing 2.

[0044] During the backwashing process, the micro-vibration component 42 drives the bottom grid 31, middle grid 32, and top grid 33 to generate micro-vibrations, which transmit vibration energy to each layer of packing 2, causing relative displacement and collision between the packing 2. In conjunction with the turning component 41, each layer of packing 2 is forcibly turned over, causing the hard scale layer on the surface of the packing 2 to crack and gradually peel off under the dual action of vibration stress and turning friction. This realizes the online breaking and removal of the scale layer on the packing 2, improves the cleaning effect of backwashing, reduces the frequency of frequent shutdowns to dig out the packing 2, and further improves the efficiency of acid removal.

[0045] It should be noted that the present invention can also place a differential pressure sensor on the packing 2 in each region. When the differential pressure sensor detects that the pressure drop of the packing 2 layer at a certain point exceeds the set threshold, which is 500 Pa in this embodiment, the differential pressure sensor automatically transmits the signal to the controller, and then the controller automatically starts backwashing the packing 2 layer.

[0046] It should be further explained that in this embodiment, not all packing 2 at all locations are backwashed at the same time. Instead, the packing 2 on the bottom grid 31, the middle grid 32, and the top grid 33 are backwashed one by one. During backwashing, the amount of flue gas introduced into the spray tower 1 is appropriately reduced, thereby achieving online backwashing without shutting down the machine.

[0047] To further extend the path of the alkaline absorbent liquid within the spray tower 1 and increase the probability of contact between the alkaline absorbent liquid and acidic substances in the flue gas, the present invention makes the following design: (See reference) Figure 3 and Figure 4 The bottom grille 31 has a horizontal structure, the middle grille 32 has a conical structure with a larger diameter at the top and a smaller diameter at the bottom, and the top grille 33 has a conical structure with a smaller diameter at the top and a larger diameter at the bottom.

[0048] The layer of filler 2 that directly contacts the upper side of the bottom grid 31 is arranged flat, the layer of filler 2 that directly contacts the upper side of the middle grid 32 is arranged in an inverted cone shape, and the layer of filler 2 that directly contacts the upper side of the top grid 33 is arranged in a cone shape.

[0049] The alkaline absorbent liquid sprayed down diffuses outward along the conical surface when passing through the conical layer of packing 2. After entering the inverted conical layer of packing 2, it gathers inward along its inverted conical surface. When it flows through the flat layer of packing 2, it is evenly distributed and flows downward. This effectively prolongs the movement path and residence time of the alkaline absorbent liquid in the spray tower 1, increases the contact opportunity between the alkaline absorbent liquid and the upward-flowing flue gas on the surface of each layer of packing 2, makes the neutralization reaction more complete, and further improves the deacidification efficiency.

[0050] In order to backwash the packing 2 in each area separately, the present invention is designed as follows: See Figure 2 , Figure 3 and Figure 4 Water guide pipes are provided on the outer sides of the bottom grid 31, the middle grid 32, and the top grid 33. The water guide pipes are radially sealed and slidably connected to the spray tower 1. The water guide pipes are connected to the external liquid supply equipment. During backwashing, the liquid supply equipment introduces the cleaning liquid into the designated water guide pipe, so that the cleaning liquid is sprayed upward from one of the bottom grid 31, the middle grid 32, and the top grid 33.

[0051] To achieve graded treatment of flue gas by the packing material 2 in each zone, the present invention makes the following design: (See reference) Figure 2Packing 2 uses metal Pall rings. The diameter of the packing 2 is gradually reduced from bottom to top. When small-diameter Pall rings are piled together, the porosity is small, the specific surface area is large, and the liquid film area is large. When large-diameter Pall rings are piled together, the porosity is large, the specific surface area is small, and the liquid film area is small.

[0052] To achieve micro-vibration of packing 2 during backwashing, the present invention makes the following design: (See reference) Figure 1 , Figure 2 and Figure 4 The micro-vibration assembly 42 includes guide columns 421 that are fixedly installed on the outside of the bottom grid 31, the middle grid 32, and the top grid 33 respectively. The guide columns 421 are radially sealed and slidably connected to the spray tower 1. The micro-vibration assembly 42 also includes three electric cylinders 422 that are fixedly installed on the outer surface of the spray tower 1. The telescopic sections of the electric cylinders 422 are fixedly connected to the guide columns 421 at the corresponding positions.

[0053] During backwashing of the packing 2, the electric cylinder 422 is repeatedly and rapidly extended and retracted in small increments at the corresponding positions, causing the electric cylinder 422 to drive the guide column 421 at the corresponding positions to sway slightly. In this embodiment, the amplitude of the guide column 421 is 1-3mm and the frequency is 50-100Hz. The guide column 421 vibrates the designated packing 2 through one of the bottom grid 31, middle grid 32, and top grid 33, thereby transmitting the vibration energy to each layer of packing 2, causing relative displacement and collision between the packing 2, and assisting in breaking the scale layer on the packing 2.

[0054] To achieve the agitation of packing 2 during backwashing, the present invention incorporates the following design: (See reference) Figure 2 , Figure 3 and Figure 5 The turning assembly 41 includes a support frame 411 fixedly installed inside the spray tower 1. A rotating cylinder 412 is rotatably connected to the lower part of the support frame 411. Several turning rollers 413 are rotatably connected to the rotating cylinder 412. The several turning rollers 413 are respectively located on the upper side of the bottom grid 31, the middle grid 32, and the top grid 33. A fixed shaft 414 is fixedly installed inside the spray tower 1. The fixed shaft 414 is sealed inside the rotating cylinder 412.

[0055] Continue reading Figure 2 , Figure 3 and Figure 5 A number of driven bevel gear discs 415 are fixedly installed on the fixed shaft 414. The turning roller 413 is located inside the rotating cylinder 412 and has a driving bevel gear 416 fixedly installed at one end. The driving bevel gear 416 meshes with the driven bevel gear discs 415. A synchronous motor 417 is fixedly installed on the support frame 411. The output shaft of the synchronous motor 417 is connected to the rotating cylinder 412 through a belt drive structure.

[0056] The belt drive structure in this embodiment includes a drive pulley fixedly mounted on the output shaft of the synchronous motor 417 and a driven pulley fixedly mounted on the outside of the rotating drum 412. A belt is wound between the drive pulley and the driven pulley. The drive pulley, the driven pulley, and the belt are all located inside the support frame 411.

[0057] When backwashing the packing 2, start the synchronous motor 417, which drives the rotating drum 412 to rotate. The rotating drum 412 drives the turning roller 413 on it to revolve around the axis of the rotating drum 412. The turning roller 413 drives the active bevel tooth 416 on it to revolve around the corresponding driven bevel tooth disk 415. Under the meshing action of the active bevel tooth 416 and the driven bevel tooth disk 415, the active bevel tooth 416 rotates, which in turn drives the turning roller 413 to rotate.

[0058] When the turning roller 413 rotates, it turns the packing 2 at the corresponding position, helping to break the scale layer on the packing 2. When the turning roller 413 revolves, it can move to each position of the packing 2 layer to turn it. In this embodiment, the revolution and rotation speed of the turning roller 413 are obtained through repeated experiments by those skilled in the art, which can realize the non-destructive turning of the packing 2 by the turning roller 413.

[0059] In summary, this invention adds structures such as bottom grid 31, middle grid 32, and top grid 33 to the traditional deacidification equipment. Although this increases the initial equipment investment cost to some extent, the invention, through a bottom-up graded treatment mode from coarse deacidification to fine deacidification, makes full use of each layer of packing material 2, significantly improving the deacidification efficiency and quality.

[0060] Meanwhile, by using online backwashing packing 2, combined with micro-vibration and non-destructive turning of packing 2, the continuous operation time of deacidification is greatly extended, significantly extending the cycle of traditional equipment that needs to be shut down for cleaning every 12 months to more than 24 months, effectively reducing the frequency of shutdown for cleaning and the labor cost of manually cleaning packing 2.

[0061] The savings in downtime losses and labor maintenance costs, as well as the increased flue gas treatment revenue due to improved deacidification efficiency, achieved by this invention during operation, can quickly offset the increased equipment investment costs in a short period of time and generate substantial economic benefits continuously. Furthermore, all parts in this invention are conventionally machined and do not employ high-precision actuators. The manufacturing and assembly processes are mature, and maintenance and replacement are convenient. This allows for effective control of manufacturing costs and subsequent maintenance expenses while ensuring significant technical effects. Therefore, this invention combines outstanding deacidification performance improvement with excellent operation and maintenance economy, possessing high practical value and broad prospects for industrial promotion.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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 hazardous waste incineration flue gas desulfurization device, comprising a spray tower and packing material filled within the spray tower, characterized in that, The deacidification unit also includes a support mechanism for vertically partitioning the packing material, and a cleaning mechanism for removing scale from the packing material. The supporting mechanism includes a bottom grid, a middle grid, and a top grid that are slidably arranged in the spray tower from bottom to top. The size of the packing material piled on the bottom grid, the middle grid, and the top grid decreases in sequence, so that the specific surface area of ​​the packing material gradually increases and the porosity gradually decreases from bottom to top. The cleaning mechanism includes a turning component for turning over the packing in each layer. The bottom grid, middle grid, and top grid are hollow and each has a nozzle on the upper side. When cleaning the scale layer, the nozzle sprays out cleaning liquid to backwash the packing, and at the same time, the packing is vibrated by a micro-vibration component installed on the spray tower. The flue gas desulfurization operation is carried out in stages by using packing material arranged in zones; during the periodic backwashing of the packing material, the packing material is turned over and slightly vibrated to remove the scale layer on the packing material online.

2. The hazardous waste incineration flue gas desulfurization device according to claim 1, characterized in that, The bottom grille has a horizontal structure, the middle grille has a conical structure with a larger diameter at the top and a smaller diameter at the bottom, and the top grille has a conical structure with a smaller diameter at the top and a larger diameter at the bottom.

3. The hazardous waste incineration flue gas desulfurization device according to claim 1, characterized in that, Water guide pipes are provided on the outer sides of the bottom grid, middle grid, and top grid. The water guide pipes are radially sealed and slidably connected to the spray tower and are connected to the external liquid supply equipment.

4. The hazardous waste incineration flue gas desulfurization device according to claim 1, characterized in that, The packing material is a metal Pall ring, and the diameter of the packing material decreases sequentially from bottom to top.

5. The hazardous waste incineration flue gas desulfurization device according to claim 1, characterized in that, The micro-vibration assembly includes guide columns that are fixedly installed on the outside of the bottom grid, the middle grid, and the top grid, respectively, and the guide columns are radially sealed and slidably connected to the spray tower.

6. The hazardous waste incineration flue gas desulfurization device according to claim 5, characterized in that, The micro-vibration assembly also includes three electric cylinders fixedly installed on the outer side of the spray tower, with the telescopic sections of the electric cylinders fixedly connected to guide columns at corresponding positions.

7. The hazardous waste incineration flue gas desulfurization device according to claim 1, characterized in that, The turning assembly includes a support frame fixedly installed inside the spray tower, a rotating cylinder sealed and rotatably connected to the lower part of the support frame, and several turning rollers sealed and rotatably connected to the rotating cylinder.

8. The hazardous waste incineration flue gas desulfurization device according to claim 7, characterized in that, Several of the aforementioned turning rollers are located on the upper side of the bottom grid, the middle grid, and the top grid, respectively. A fixed shaft is fixedly installed inside the spray tower, and the fixed shaft is sealed inside the rotating cylinder.

9. The hazardous waste incineration flue gas desulfurization device according to claim 8, characterized in that, Several driven bevel gear discs are fixedly installed on the fixed shaft, and an active bevel gear is fixedly installed at one end of the turning roller located inside the rotating cylinder. The active bevel gear meshes with the driven bevel gear discs.

10. A hazardous waste incineration flue gas desulfurization device according to claim 7, characterized in that, A synchronous motor is fixedly installed on the support frame, and the output shaft of the synchronous motor is connected to the rotating drum through a belt drive structure.

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