Lime slurry delivery assembly based on waste incineration

Abstract

The utility model discloses a lime slurry conveying assembly based on garbage incineration relates to garbage incineration flue gas treatment technical field, including lime slurry conveying pipeline, be in the clean conveying mechanism of lime slurry conveying pipeline inside and be used for driving the drive assembly of clean conveying mechanism, the clean conveying mechanism includes the rotation pipe of coaxial wear in lime slurry conveying pipeline, the fixed connection of no -shaft helical blade of coaxial extension has on the rotation pipe, make no -shaft helical blade rotate around lime slurry conveying pipeline axis through drive assembly, and the axial thrust that no -shaft helical blade rotates can forcibly push slurry and the solid particle in it directional flow along the pipeline, avoid the particle and deposit accumulation in the bottom of pipeline, solveed that the lime slurry because high viscosity, solid particle density big cause's pipeline bottom deposit blockage, the stratification of slurry in pipe is uneven, and the pipe wall scale adhesion, and the lime slurry in pipeline conveying efficiency is low, the problem of influence garbage incineration's overall efficiency.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration flue gas treatment technology, specifically to a lime slurry conveying assembly based on waste incineration. Background Technology

[0002] In the process of waste incineration, lime slurry is used as a key desulfurizing agent to absorb SO2 and CO2 gases generated during incineration. However, as a solid-liquid two-phase fluid, lime slurry contains incompletely slaked lime particles and CaSO3 / CaSO4 solid particles generated by the reaction. The particle density is much higher than that of water, and the concentration is easily affected by the quality of raw materials and the slaked process. The viscosity will also increase significantly under low temperature conditions, which naturally results in poor fluidity.

[0003] Existing lime slurry conveying systems often use low-speed single-blade agitators in their slurry supply tanks, which cannot achieve sufficient homogenization of the slurry. Particle deposition zones easily form at the bottom of the tank, and the local flow velocity in the conveying pipeline is prone to falling below the anti-deposition critical value. This leads to continuous particle deposition and crystallization on the pipe wall, reducing the effective pipe diameter. At the same time, the presence of large-sized limestone particles in the lime slurry conveying pipeline can easily clog the slurry outlet, reducing the amount of slurry flowing into the feed hopper and thus lowering the gas absorption rate. The lime slurry flows slowly in the pipeline, resulting in low conveying efficiency and affecting the overall efficiency of waste incineration. These problems increase lime consumption per unit of processing volume and lead to higher SO2 emission data. These issues not only cause a sharp increase in slurry flow resistance and a decrease in conveying efficiency, but also require frequent shutdowns to disassemble and clean the pipeline, further exacerbating the risk of system operation interruption and increasing system energy consumption and maintenance costs. Utility Model Content

[0004] One objective of this invention is to provide a lime slurry conveying assembly for waste incineration. By incorporating shaftless spiral blades rotating around their own axis within the lime slurry conveying pipeline, this invention solves the problems of sedimentation and blockage at the bottom of the pipeline, uneven slurry stratification within the pipe, and scale buildup on the pipe wall caused by the high viscosity and high density of solid particles in the lime slurry, as well as the low conveying efficiency of the lime slurry within the pipeline, which affects the overall efficiency of waste incineration. The axial pushing force generated by the rotation of the blades can forcibly convey the deposited particles, scrape off the initial scale buildup on the pipe wall at the edges, avoid pipeline blockage, and reduce the frequency of cleaning. The rotational stirring action can also break up the slurry stratification, ensuring that the slurry concentration delivered to the absorption tower is uniform and stable, thereby improving the stability of the desulfurization reaction efficiency. Furthermore, it can assist slurry flow, reduce conveying resistance, save energy, reduce pipe wall corrosion, and extend pipeline life. When the system is shut down, it can also push out residual slurry to avoid raw material waste and additional flushing. Overall, it improves the continuity, stability, and economy of lime slurry conveying.

[0005] This objective is achieved using the following technical solution:

[0006] The lime slurry conveying assembly for waste incineration includes a lime slurry conveying pipeline, a cleaning conveying mechanism disposed within the lime slurry conveying pipeline, and a drive assembly for driving the cleaning conveying mechanism. The cleaning conveying mechanism includes a rotating tube coaxially inserted within the lime slurry conveying pipeline. A coaxially extending shaftless helical blade is fixedly connected to the rotating tube. The drive assembly causes the shaftless helical blade to rotate around the axis of the lime slurry conveying pipeline. The axial thrust generated by the blade rotation forces the slurry and its solid particles to flow directionally along the pipeline, preventing particles from settling and accumulating at the bottom of the pipeline. Furthermore, the tiny gap between the blade edge and the inner wall of the pipeline can scrape away initial scale adhering to the pipe wall in real time, preventing scale accumulation and reducing the flow cross-section. Simultaneously, continuous rotation and stirring can break up the slurry stratification phenomenon, maintaining a uniform and stable slurry concentration. Ultimately, this ensures the continuity of lime slurry conveying in waste incineration desulfurization scenarios, reduces the frequency of downtime for cleaning due to pipeline blockage and scaling, lowers conveying resistance and energy consumption, and avoids waste due to residual slurry clumping. This provides a stable and uniform slurry supply for the efficient desulfurization reaction in the absorption tower, improving the stability of lime slurry conveying.

[0007] Compared to existing devices, existing lime slurry conveying components mostly consist of conveying pipes and centrifugal / screw slurry conveying pumps. To address the issues of poor uniformity in lime slurry conveying, easy scaling of pipes, and low conveying efficiency, existing devices often increase the output pressure of the slurry conveying pump to increase the flow velocity inside the pipe, attempting to reduce solid particle settling and stratification through turbulence. However, high flow velocities easily lead to increased pipe wear and soaring energy consumption. Furthermore, low-concentration slurry is still prone to stratification, resulting in a significant increase in energy consumption during the conveying process, making it difficult to guarantee conveying efficiency and stability.

[0008] This device utilizes shaftless spiral blades installed within a lime slurry conveying pipeline. The drive assembly enables these blades to rotate around their own axis, ensuring the lime slurry is constantly under dynamic stirring and directional pushing during transport. The continuous spiral structure of the shaftless spiral blades generates axial thrust as it rotates, causing the slurry and its solid particles to flow smoothly along the pipeline, preventing particle settling and accumulation. Furthermore, the shaftless design, without a central axis obstruction, effectively prevents solid particles from entangled or stuck, further enhancing the stirring effect, breaking down slurry stratification, and ensuring uniform and stable slurry concentration throughout the transport process. Ultimately, this achieves efficient, continuous, and low-resistance transport of lime slurry, providing a stable and reliable slurry supply to the absorption tower of a waste incineration desulfurization system.

[0009] Furthermore, the pitch of the inlet section of the shaftless helical blade is 0.8-1 times the inner diameter of the lime slurry conveying pipe. The inlet section is the starting area where the slurry enters the pipe. When the small-pitch helical structure rotates, the blade thrust per unit length is more concentrated, which can quickly receive and forcefully push the slurry that has just entered the pipe, preventing the slurry from stagnating and accumulating at the inlet. At the same time, the small pitch has a stronger stirring effect, which can quickly break up the slurry clumps at the inlet and ensure the smoothness of the initial conveying. The pitch of the outlet section of the shaftless helical blade is 1.2-1.5 times the inner diameter of the lime slurry conveying pipe. As the slurry is stirred evenly by the blades in the pipe, the outlet section adopts a larger pitch, which can increase the amount of slurry pushed per unit rotation cycle, increase the end conveying flow rate, and avoid the slurry slowing down and settling before the outlet. At the same time, the larger pitch blade gap is wider, which is suitable for the state of the already mixed slurry, reduces unnecessary stirring resistance, and reduces energy consumption while ensuring stable conveying.

[0010] Furthermore, the pitch of the shaftless helical blades changes linearly from the inlet section to the outlet section. This linearly changing pitch allows the blade pushing force and stirring intensity to change smoothly with the length of the pipeline, preventing the formation of local eddies or dead zones due to abrupt pitch changes. This avoids problems such as sudden changes in flow velocity and particle accumulation in the transition zone of the slurry, while also reducing additional energy consumption caused by sudden changes in resistance. The length of the shaftless helical blades is not less than twice the inner diameter of the lime slurry conveying pipeline. The sufficiently long shaftless helical blade length provides ample space for the slurry state transition, avoiding problems such as insufficient mixing and discontinuous pushing force connection due to excessively short transitions, making the conveying process smoother and more efficient.

[0011] Furthermore, the shaftless helical blade is fixedly connected to the rotating pipe via several connecting blocks evenly distributed circumferentially along the inner wall of the rotating pipe. The thickness of the connecting blocks creates a certain gap between the shaftless helical blade and the inner wall of the lime slurry conveying pipe. This gap prevents direct friction between the blade and the inner wall of the pipe, reduces wear on the wear-resistant coating of the blade and the inner lining of the pipe, and extends the service life of the rotating components. The reasonable gap allows the radial disturbance force generated when the blade rotates to fully act on the slurry near the pipe wall, breaking the static boundary layer of easily deposited particles, preventing particles from depositing and scaling on the pipe wall, and reducing the flow resistance of the slurry. This makes the blade rotate more smoothly and consumes less energy, ensuring continuous and stable rotation. It is suitable for conveying lime slurry containing particles and with high viscosity from waste incineration, ensuring the continuity and reliability of the conveying process.

[0012] Furthermore, fixed pipes are coaxially sleeved at both ends of the rotating pipe. The fixed pipes are fixedly connected to the lime slurry conveying pipeline, providing a fulcrum for the rotating pipe and ensuring that the rotating pipe is coaxially located inside the lime slurry conveying pipeline. A rotating sealing mechanism is provided between the fixed pipe and the rotating pipe to prevent the lime slurry inside the pipe from leaking out through the gap. On the other hand, it prevents external air and dust from entering the pipeline and affecting the slurry quality, so that the rotating pipe can rotate relative to the fixed pipe around its own axis, thereby driving the shaftless spiral blades to rotate synchronously, realizing the pushing and stirring of the slurry.

[0013] Furthermore, the rotary sealing mechanism includes a sealing ring, which is embedded in an annular groove on the inner wall of the fixed pipe and located between the rotary pipe and the fixed pipe. The inner side of the sealing ring is interference-fitted with the outer circumferential surface of the rotary pipe. The annular groove enables precise positioning of the sealing ring, preventing it from shifting or falling off under rotation and slurry impact. At the same time, the interference fit between the sealing ring and the outer circumferential surface of the rotary pipe forms a tight dynamic sealing surface, effectively preventing leakage of alkaline lime slurry containing solid particles and preventing external impurities from entering the pipeline and affecting the slurry quality. This meets the needs of dynamic transportation of lime slurry in waste incineration desulfurization scenarios.

[0014] Furthermore, the rotary sealing mechanism also includes a bearing groove on the fixed tube, in which a deep groove ball bearing is installed. The deep groove ball bearing is sleeved on the outer circumference of the rotary tube and fixed in the bearing groove of the fixed tube. This can precisely limit the radial runout and sway of the rotary tube, ensuring that the rotary tube always remains coaxial with the fixed tube. This provides a stable sealing environment for the sealing ring, preventing excessive local compression, wear, or detachment of the sealing surface due to the shaking of the rotary tube, significantly extending the service life of the sealing ring, and making the sealing effect more stable.

[0015] Furthermore, the drive mechanism includes a first bevel gear coaxially fixedly connected to the radially outer side of the rotating tube. The axis of the first bevel gear is the same as the axis of the rotating tube and rotates synchronously with the rotating tube. The first bevel gear and the second bevel gear mesh, and the second bevel gear can rotate around its own axis. When the drive source drives the second bevel gear to rotate around its own axis, the power and torque are transmitted to the first bevel gear through the meshing teeth by utilizing the characteristics of bevel gear tooth surface meshing transmission, thereby driving the shaftless spiral blades inside the rotating tube to rotate and realize the pushing of slurry.

[0016] Furthermore, it also includes a lime slurry mixing tank, a lime slurry circulation tank, and an absorption tower. The lime slurry mixing tank, the lime slurry circulation tank, and the absorption tower are connected by a lime slurry conveying pipeline. After the lime is unloaded from the lime silo, it enters the lime slurry mixing tank and mixes with cooling water. The mixed lime slurry is connected to the lime slurry circulation tank through the lime slurry conveying pipeline. The lime slurry circulation tank is connected to the spray pipe in the absorption tower through the lime slurry conveying pipeline. This realizes the closed-loop conveying of lime slurry between the mixing tank, the circulation tank, and the absorption tower during the desulfurization process of waste incineration flue gas, and provides a continuous, uniform, and stable slurry supply for the SO2 absorption reaction in the absorption tower.

[0017] Furthermore, the lime slurry mixing pipe and the lime slurry circulation tank are equipped with a two-stage stirring mechanism. The two-stage stirring mechanism includes a rotating shaft, on which turbine blades and propeller blades are coaxially and fixedly connected from top to bottom. The upper turbine blades focus on radial high-intensity stirring, which can quickly break up lumps of lime raw materials and evenly disperse solid particles into the water. The lower propeller blades focus on axial stirring, generating an upward thrust to push the raw material particles deposited at the bottom of the tank upward, and fully convect and mix with the upper dispersed slurry to promote rapid dissolution of lime and improve the quality of slurry preparation.

[0018] Compared with the prior art, the lime slurry conveying assembly based on waste incineration provided by this utility model has the following beneficial effects:

[0019] 1. The lime slurry conveying component based on waste incineration of this utility model solves the problems of sedimentation and blockage at the bottom of the pipe, uneven slurry stratification and scaling on the pipe wall caused by the high viscosity and high density of solid particles of lime slurry, as well as the low conveying efficiency of lime slurry in the pipe, which affect the overall efficiency of waste incineration. It ensures that the slurry concentration is uniform and stable throughout the conveying process, and finally realizes efficient, continuous and low-resistance conveying of lime slurry, providing a stable and reliable slurry supply for the absorption tower of the waste incineration desulfurization system.

[0020] 2. The lime slurry conveying assembly based on waste incineration of this utility model uses a two-stage stirring mechanism. The upper turbine blades use strong shear force to break up lime raw material clumps and accelerate solid-liquid dissolution and mixing, while the lower propeller blades use axial thrust to stir the slurry at the bottom of the tank. This effectively prevents lime raw materials from accumulating and hardening at the bottom of the mixing tank, and at the same time prevents solid particles in the circulating slurry from settling and agglomerating. This reduces the risk of pipe and spray nozzle blockage from the source, ensures continuous operation of the conveying assembly, improves the sufficiency and stability of the reaction, and takes into account desulfurization efficiency, resource utilization and system operation reliability. Attached Figure Description

[0021] The accompanying drawings, which are provided to further illustrate the embodiments of the present invention and constitute a part of the present invention, do not constitute a limitation thereof.

[0022] Figure 1 This is a schematic diagram of the overall structure of the lime slurry conveying component based on waste incineration in this utility model;

[0023] Figure 2 This is a schematic diagram of the cleaning conveying mechanism in the lime slurry conveying assembly based on waste incineration in this utility model;

[0024] Figure 3 This is a schematic diagram of the connection between the rotating tube and the shaftless spiral blade in the lime slurry conveying assembly based on waste incineration in this utility model.

[0025] Figure 4 This is a schematic diagram of the drive component in the lime slurry conveying assembly based on waste incineration in this utility model;

[0026] Figure 5 This is a schematic diagram of the two-stage mixing mechanism in the lime slurry conveying assembly based on waste incineration in this utility model.

[0027] Among them, 1-lime slurry conveying pipe, 2-rotating pipe, 3-fixed pipe, 4-shaftless spiral blade, 5-connecting block, 6-sealing ring, 7-annular groove, 8-bearing groove, 9-deep groove ball bearing, 10-first bevel gear, 11-second bevel gear, 12-first motor, 13-lime slurry mixing tank, 14-lime slurry circulation tank, 15-absorption tower, 16-rotating shaft, 17-turbine blade, 18-propeller blade, 19-second motor, 20-smoke inlet, 21-smoke outlet, 22-spray pipe, 23-atomizing nozzle, 24-screw pump, 25-lime silo, 26-star-shaped ash discharge valve. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of this utility model and the features within them can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0030] Example 1

[0031] like Figure 1 and Figure 2 The litter incineration-based lime slurry conveying assembly shown includes a litter incineration conveying pipe 1, a cleaning conveying mechanism disposed within the litter incineration conveying pipe, and a drive assembly for driving the cleaning conveying mechanism. The cleaning conveying mechanism includes a rotating pipe 2 coaxially inserted within the litter incineration conveying pipe 1. A coaxially extending shaftless helical blade 4 is fixedly connected to the rotating pipe 2. The drive assembly drives the rotating pipe 2 to rotate, thereby causing the shaftless helical blade 4 to rotate synchronously around the axis of the litter incineration conveying pipe 1, thus promoting the conveying of litter and preventing the litter incineration conveying pipe 1 from settling or stratifying.

[0032] The flow velocity of lime slurry in the lime slurry conveying pipeline 1 is 1.2-1.8 m / s, and the rotation speed of the spiral blades is 5-25 r / min. This allows the shaftless spiral blades to continuously push and break the inertia of particle settling, while also preventing solid particles from accumulating and caking at the bottom of the pipeline and in bends at a reasonable flow velocity. This significantly reduces the risk of blockage in the pipeline and subsequent spray nozzles, ensuring the continuous operation of the desulfurization system.

[0033] In some embodiments, the pitch of the inlet section of the shaftless helical blade 4 is 0.8-1 times the inner diameter of the lime slurry conveying pipe 1, and the pitch of the outlet section of the shaftless helical blade 4 is 1.2-1.5 times the inner diameter of the lime slurry conveying pipe 1.

[0034] In some embodiments, the pitch of the shaftless helical blade 4 changes linearly from the inlet section to the outlet section, and the length of the transition section is not less than twice the inner diameter of the lime slurry conveying pipe 1.

[0035] In some embodiments, the helix angle of the shaftless helical blade 4 is 15°-30°, which is adapted to the flow rate of lime slurry and balances the pushing force and stirring intensity.

[0036] In some embodiments, such as Figure 3 As shown, the shaftless helical blade 4 is fixedly connected to the rotating tube 2 by several connecting blocks 5 evenly distributed along the inner wall of the rotating tube 2.

[0037] In some embodiments, the ratio of the height of the connecting block 5 along the radial direction of the rotating pipe 2 to the inner diameter of the lime slurry conveying pipe 1 is 0.05-0.1, which satisfies the structural strength of the connection block 5 to the inner wall of the lime slurry conveying pipe 1, while ensuring smooth flow of the slurry without increasing the conveying resistance and driving energy consumption.

[0038] Example 2

[0039] Based on Example 1, such as Figure 2As shown, fixed pipes 3 are coaxially sleeved at both ends of the rotating pipe 2. The fixed pipes 3 and the lime slurry conveying pipe 1 are fixedly connected. The fixed pipe and the lime slurry conveying pipe adopt a streamlined transition connection design, so that the inner wall of the pipe forms a continuous and smooth flow channel, ensuring that the lime slurry flows smoothly along the flow line at the junction of the fixed pipe and the conveying pipe. A rotating sealing mechanism is provided between the fixed pipe 3 and the rotating pipe 2, so that the rotating pipe 2 prevents the lime slurry in the pipe from leaking from the gap while rotating relative to the fixed pipe 3 around its own axis, ensuring the continuity and reliability of the conveying.

[0040] In some embodiments, the rotary sealing mechanism includes a sealing ring 6, which is embedded in the annular groove 7 on the inner wall of the fixed tube 3 and located between the rotary tube 2 and the fixed tube 3. The inner side of the sealing ring 6 is in interference fit with the outer circumferential surface of the rotary tube 2.

[0041] In some embodiments, the rotary sealing mechanism further includes a bearing groove 8 provided on the fixed tube 3, and a deep groove ball bearing 9 is provided in the bearing groove 8, which is sleeved on the outer periphery of the rotary tube 2.

[0042] In some embodiments, such as Figure 4 As shown, the driving mechanism includes a first bevel gear 10 coaxially fixedly connected to the radially outer side of the rotating tube 2. The first bevel gear 10 and the shaftless helical blade 5 on the rotating tube 2 rotate synchronously. The first bevel gear 10 and a second bevel gear 11 mesh, and the second bevel gear 11 is connected to a first motor 12. The first motor 12 drives the second bevel gear to rotate, thereby driving the meshing first bevel gear 11 to rotate. This causes the shaftless helical blade 5 to rotate around its own axis, realizing the pushing of the slurry.

[0043] Example 3

[0044] Based on Examples 1 and 2, such as Figure 1As shown, the system also includes a lime slurry mixing tank 13, a lime slurry circulation tank 14, and an absorption tower 15. The lime slurry mixing tank 13, the lime slurry circulation tank 14, and the absorption tower 15 are connected by a lime slurry conveying pipeline 1. The lime raw material in the lime silo 25 is metered by a star-shaped ash discharge valve 26 and quantitatively falls into the lime slurry mixing tank 13 to mix with cooling water, preparing a uniform lime slurry with a solid content of 10%-20% and no lumps. The mixed lime slurry is connected to the lime slurry circulation tank 14 through the lime slurry conveying pipeline 1. When the absorption tower 15 needs slurry supply, a screw pump 2 connected to the lime slurry circulation tank 14... 4. Upon startup, the lime slurry is pressurized and transported through the lime slurry conveying pipe 1 to the spray pipe 22 of the absorption tower 15. The lime slurry is atomized into fine droplets through the atomizing nozzle 23 on the spray pipe 22 and evenly sprayed inside the absorption tower 15. It fully contacts the waste incineration flue gas introduced through the flue gas inlet 20 to achieve the SO2 absorption reaction. Finally, it flows from the flue gas outlet to the next process stage. The unreacted slurry is collected in the slurry pool at the bottom of the absorption tower 15 and returned to the lime slurry circulation tank 14 through the lime conveying pipe 1. After being mixed with fresh slurry, it is transported to the spray pipe 22 again to complete the recycling and provide a uniform and stable slurry supply.

[0045] In some embodiments, such as Figure 1 and Figure 5 As shown, the lime slurry mixing tank 13 and the lime slurry circulation tank 14 are equipped with a two-stage stirring mechanism. The two-stage stirring mechanism includes a rotating shaft 16, which is connected to a second motor 19. Turbine blades 17 and propeller blades 18 are coaxially fixedly connected from top to bottom on the rotating shaft 16. The second motor 19 drives the turbine blades 17 and propeller blades 18 to rotate through the rotating shaft 16, thereby promoting the rapid dissolution of lime and improving the quality of slurry preparation.

[0046] In some embodiments, the diameter of the turbine blade 17 is 0.3-0.5 times the inner diameter of the tank, and the number of turbine blades 17 is 6-8, to ensure uniform force during stirring, reduce tank vibration, and at the same time improve the shear surface coverage and efficiently break up lumpy lime.

[0047] In some embodiments, the diameter of the propulsion blade 18 is 0.3-0.4 times the inner diameter of the tank, and the number of blades of the propulsion blade 18 is 3-4, thereby improving the efficiency of pushing particles from the bottom of the tank.

[0048] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0049] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A lime slurry conveying assembly based on waste incineration, characterized in that, The system includes a lime slurry conveying pipe (1), a cleaning conveying mechanism disposed within the lime slurry conveying pipe, and a drive assembly for driving the cleaning conveying mechanism. The cleaning conveying mechanism includes a rotating pipe (2) coaxially inserted within the lime slurry conveying pipe (1). A coaxially extending shaftless spiral blade (4) is fixedly connected to the rotating pipe (2). The drive assembly causes the shaftless spiral blade (4) to rotate around the axis of the lime slurry conveying pipe (1).

2. The lime slurry conveying assembly based on waste incineration according to claim 1, characterized in that, The pitch of the inlet section of the shaftless spiral blade (4) is 0.8-1 times the inner diameter of the lime slurry conveying pipe (1), and the pitch of the outlet section of the shaftless spiral blade (4) is 1.2-1.5 times the inner diameter of the lime slurry conveying pipe (1).

3. The lime slurry conveying assembly based on waste incineration according to claim 2, characterized in that, The pitch of the shaftless helical blade (4) gradually changes linearly from the inlet section to the outlet section, and the length of the shaftless helical blade (4) is not less than twice the inner diameter of the lime slurry conveying pipe (1).

4. The lime slurry conveying assembly based on waste incineration according to claim 1, characterized in that, The shaftless helical blade (4) is fixedly connected to the rotating tube (2) by several connecting blocks (5) evenly distributed along the inner wall of the rotating tube (2).

5. The lime slurry conveying assembly based on waste incineration according to claim 1, characterized in that, The rotating tube (2) is coaxially fitted with a fixed tube (3) at both ends. The fixed tube (3) is fixedly connected to the lime slurry conveying pipe (1). A rotating sealing mechanism is provided between the fixed tube (3) and the rotating tube (2), so that the rotating tube (2) can rotate relative to the fixed tube (3) around its own axis.

6. The lime slurry conveying assembly based on waste incineration according to claim 5, characterized in that, The rotary sealing mechanism includes a sealing ring (6), which is embedded in the annular groove (7) on the inner wall of the fixed tube (3) and located between the rotary tube (2) and the fixed tube (3). The inner side of the sealing ring (6) is in interference fit with the outer circumferential surface of the rotary tube (2).

7. The lime slurry conveying assembly based on waste incineration according to claim 6, characterized in that, The rotary sealing mechanism also includes a bearing groove (8) provided on the fixed tube (3), and a deep groove ball bearing (9) is provided in the bearing groove (8), which is sleeved on the outer periphery of the rotary tube (2).

8. The lime slurry conveying assembly based on waste incineration according to claim 1, characterized in that, The drive assembly includes a first bevel gear (10) coaxially fixed to the radially outer side of the rotating tube (2), the first bevel gear (10) and the second bevel gear (11) meshing, and the second bevel gear (11) being able to rotate around its own axis.

9. The lime slurry conveying assembly based on waste incineration according to claim 1, characterized in that, It also includes a lime slurry mixing tank (13), a lime slurry circulation tank (14), and an absorption tower (15), which are connected by a lime slurry conveying pipeline (1).

10. The lime slurry conveying assembly based on waste incineration according to claim 9, characterized in that, The lime slurry mixing tank (13) and lime slurry circulating tank (14) are equipped with a two-stage stirring mechanism. The two-stage stirring mechanism includes a rotating shaft (16), on which turbine blades (17) and propeller blades (18) are coaxially fixed from top to bottom.

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