A compact down-flow up-flow settler for oxygen-rich flue gas of spent catalyst roasting

Abstract

The application discloses a down-in and up-out type settler for oxygen-rich flue gas of waste catalyst rich oxygen roasting, which comprises a settler shell, a flow separation plate arranged at the inner center of the settler shell, a buckle plate inserted on the right side wall of the settler shell, a plurality of turbulence tooth supports fixed on the side walls opposite to the flow separation plate of the buckle plate, three-edge turbulence teeth inserted in the turbulence tooth supports, a fine dust interception plate arranged below the flow separation plate, flow guide plates staggered on the left side of the settler shell, a throat pipe mounting rack arranged above the left side settling section of the settler shell, two throat pipes arranged in the throat pipe mounting rack, a spiral trapping ring arranged on the inner wall of the contraction section of the throat pipe, and an elastic throat core assembly arranged on the throat pipe. The flow separation plate is arranged at the inner center of the settler shell, so that the shell is divided into two independent flow channels, the stable down-in and up-out flow direction of the flue gas is forced, and the flue gas short circuit phenomenon is avoided from the root.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of flue gas dust removal, in particular to a down-inlet and up-outlet type settler for compact waste catalyst oxygen-enriched roasting flue gas. BACKGROUND

[0002] In the oxygen-enriched roasting process of waste catalyst, the flue gas before entering the waste heat boiler needs to be dedusted. The traditional dedusting idea is that the kiln tail hood is connected with the inlet of the dust removal chamber through a mountain-shaped pipeline, and the outlet of the dust removal chamber is connected with the inlet of the waste heat boiler through a mountain-shaped pipeline. Although the dust removal effect can be achieved, a large space is usually occupied, and it is difficult to efficiently arrange under the condition that the area between the roasting kiln tail and the waste heat boiler is narrow, and the top of the mountain-shaped pipeline is prone to dust accumulation.

[0003] In order to overcome the problem of dust removal from the kiln tail to the waste heat boiler in a narrow area, a compact, high-efficiency and narrow-space flue gas dust removal device is urgently needed. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a down-inlet and up-outlet type settler for compact waste catalyst oxygen-enriched roasting flue gas.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a compact waste catalyst oxygen-rich roasting flue gas down-inlet and up-outlet type settler, comprising a settler shell, a flow separation plate is arranged at the inside center of the settler shell for forming a flue gas down-inlet and up-outlet flow direction, a buckle plate is inserted on the side wall of the flue gas inlet section on the right side of the settler shell, a plurality of turbulence tooth supports are fixed on the side wall of the buckle plate opposite to the flow separation plate, three-prong turbulence teeth for turbulence auxiliary settlement are inserted in the turbulence tooth supports, a fine dust interception plate for intercepting floating fine dust is arranged below the flow separation plate, a honeycomb-shaped micropore is arranged on the surface of the fine dust interception plate for reducing air resistance and fine dust interception, a interception plate driving assembly is arranged at the output end of the fine dust interception plate, the interception plate driving assembly comprises an interception plate swing piece fixed at the fine dust interception plate rotating and extracting end, a strip-shaped slot is formed in the interception plate swing piece, a connecting piece is connected to the interception plate swing piece through the strip-shaped slot, an end surface of the connecting piece is provided with a swing piece driver, the swing piece driver is connected with the outer wall of the settler shell, the swing piece driver and the interception plate swing piece are externally provided with a swing piece protection shell for protecting the two, turbulence plates for slowing down the flue gas flow are staggered arranged below the settler shell left side settlement section, a throat pipe mounting rack is arranged above the turbulence plates on the left side settlement section of the settler shell, two throat pipes for fine dust interception are arranged in the throat pipe mounting rack, a spiral retention ring for forming spiral airflow is arranged on the inner wall of the contraction section of the throat pipe, an elastic throat core assembly for variable diameter is arranged at the throat position of the throat pipe, the elastic throat core assembly comprises a throat core frame inserted in the contraction section of the throat pipe, a throat core is arranged between the throat core frames, the throat core is located at the throat position of the throat pipe, a plurality of butterfly-shaped springs are circumferentially arranged on the inner wall of the throat of the throat pipe, a steel sheet connecting piece is arranged on the inner side of the butterfly-shaped spring, an elastic steel sheet is slidably connected to the steel sheet connecting piece, the inner side of the spring steel sheet is attached to the throat core, and a strip-shaped slot is formed at the connection between the elastic steel sheet and the steel sheet connecting piece.

[0006] Further, a shell support supporting the settler shell is arranged below the settler shell, a dust collecting hopper for collecting dust is fixed at the bottom end center of the settler shell, a spiral dust guide groove is arranged in the dust collecting hopper, a vibrator for vibrating and cleaning dust is arranged at the back of the dust collecting hopper, a flue gas inlet pipe is inserted at the back of the flue gas inlet section of the settler shell, and a flue gas outlet pipe is inserted on the top end side wall of the settlement section of the settler shell.

[0007] Further, the throat pipe mounting rack comprises support groove plates fixed on the outer walls on both sides of the settlement section of the settler shell, throat pipe supports for supporting the throat pipe are inserted in the inside of the support groove plates, and sealing rubber strips are fixed on the edges of the throat pipe in contact with the inner wall of the settler shell.

[0008] Further, the lower part of the throat pipe is fixed with a gas collecting cover, and the other side of the throat pipe corresponding to the gas collecting cover is inserted with a flow guide grid.

[0009] The beneficial effects of the present application are:

[0010] The flow channel design has strong controllability of flue gas treatment path, and effectively avoids flue gas short circuit: by arranging a flow separation plate in the center of the settler shell, the shell is divided into two independent flow channels, the flue gas is forced to form a stable downward flow and upward flow direction, the flue gas short circuit phenomenon is avoided from the root, the flue gas can be fully contacted with each functional component inside, laying a foundation for subsequent efficient settling treatment, and the completeness and effectiveness of flue gas treatment are improved.

[0011] Multi-stage turbulence and interception synergy, high settling efficiency and complete fine dust capture: on the one hand, the three-pronged turbulence teeth arranged at the flue gas inlet section break the laminar state of the flue gas through the three-pronged structure, causing the dust particles to separate from the airflow trajectory due to inertia, and at the same time, pushing the fine dust to collide and agglomerate, on the other hand, the staggered distribution of turbulence plates under the settling section prolongs the flue gas flow path and slows down the flow speed, providing sufficient time for gravitational settling, further strengthening the agglomeration effect, and then cooperating with the Venturi effect of the throat pipe and the centrifugal force of the spiral interception ring to realize deep separation of dust, and finally capturing residual fine dust through the fine dust interception plate, forming a multi-stage synergistic treatment system, which significantly improves the interception efficiency of dust with different particle sizes, especially ensuring the treatment effect of fine dust.

[0012] Strong working condition adaptability: the elastic throat core assembly arranged at the throat of the throat pipe can adaptively adjust the flow diameter according to the working conditions such as flue gas flow, temperature, etc., ensuring that the best airflow speed can be maintained under different working conditions, realizing dynamic balance of interception efficiency and system resistance, effectively avoiding the problem of decreased interception efficiency or excessive system resistance caused by working condition fluctuations, widening the application range of the equipment and improving the operation stability.

[0013] Self-cleaning and anti-clogging design is perfect, which ensures long-term stable operation: the fine dust interception plate is equipped with an interception plate driving assembly, which can drive the interception plate to swing and realize self-cleaning, avoiding dust adhesion and clogging on the surface of the interception plate, the spiral dust guide groove is arranged in the dust collector to guide the slow sliding of the dust, and the vibration device at the back produces high-frequency vibration, preventing dust from adhering and accumulating on the inner wall of the dust collector, ensuring smooth dust discharge, significantly reducing the risk of equipment clogging, and ensuring long-term stable interception and dust discharge efficiency.

[0014] Low air resistance: the surface of the fine dust interception plate adopts a honeycomb-like microporous structure, which maximally reduces the air resistance of the flue gas when passing through under the premise of ensuring the fine dust interception effect, the flow guide grid disperses and regularizes the flue gas discharged from the throat pipe, avoiding the increase of local resistance caused by unstable flow phenomena such as deflection and vortex, and the overall design effectively controls the system energy consumption and improves the economy of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the present application.

[0016] Figure 2 is Figure 1 is a sectional view of the connecting structure of the settling section of the settler shell.

[0017] Figure 3 is Figure 1 is a front view of the connecting structure.

[0018] Figure 4 is Figure 3 is a right view of the connecting structure of the throat.

[0019] Figure 5 is Figure 1 is a top view of the connecting structure.

[0020] Figure 6 is Figure 1 is a top view of the connecting structure of the dust hopper.

[0021] Figure 7 is Figure 4 is a connecting structure detail of the elastic steel sheet.

[0022] Figure 8 is Figure 2 is a top view of the connecting structure.

[0023] Figure 9 is Figure 4 is a connecting structure detail of the position A.

[0024] Figure 10 is Figure 3 is a right view of the connecting structure of the three-pronged spoiler.

[0025] BRIEF DESCRIPTION OF DRAWINGS 1. settler shell, 2. shell support, 3. dust hopper, 4. spiral dust guide, 5. buckle plate, 6. spoiler support, 7. three-pronged spoiler, 8. fine dust interception plate, 9. interception plate swing, 10. swing driver, 11. connecting piece, 12. swing protection shell, 13. support slot plate, 14. throat support, 15. throat, 16. spiral retention ring, 17. gas collecting hood, 18. throat core support, 19. throat core, 20. butterfly spring, 21. steel sheet connecting piece, 22. elastic steel sheet, 23. flow guide grid, 24. vibrator, 25. spoiler. DETAILED DESCRIPTION

[0026] The present application will be further described in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not used to limit the scope of the present application. Furthermore, it should be understood that those skilled in the art can make various modifications or changes to the present application after reading the content taught by the present application, and these equivalent forms also fall within the scope defined by the appended claims.

[0027] Referring to Figures 1-10 is a structural schematic diagram of the present application, a compact type waste catalyst oxygen-enriched roasting flue gas down-inlet and up-outlet type settler, comprising a settler shell 1 for providing installation support basis for all internal functional components, while forming a closed flue gas treatment space, guaranteeing the flue gas to complete the settling process in the internal according to the preset flow direction, preventing flue gas leakage, a flow separation plate is arranged at the internal center of the settler shell 1 for forming the flue gas down-inlet and up-outlet flow direction, the flow separation plate as a key component for guiding the flue gas flow direction can divide the internal space of the settler shell 1 into two independent flow channels, forcing the flue gas to flow upwards along the specified path from the lower part, avoiding the short circuit of the flue gas, and ensuring that the flue gas is in full contact with the internal functional components to improve the settling efficiency.

[0028] The side wall of the flue gas inlet section on the right side of the settler shell 1 is inserted with a buckling plate 5, the buckling plate 5 as a mounting and fixing carrier of the flow disturbing tooth support 6 is fixed with the settler shell 1 through bolts, which is convenient for subsequent maintenance and repair of the flow disturbing tooth related components, while it can enhance the structural sealing performance of the flue gas inlet section, reduce the leakage of flue gas from the side wall gap, the side wall opposite to the flow separation plate of the buckling plate 5 is fixed with a plurality of flow disturbing tooth supports 6, the flow disturbing tooth support 6 is used to provide stable installation support for the three-prong flow disturbing tooth 7, and ensure that the three-prong flow disturbing tooth 7 maintains a fixed posture under the impact of flue gas, while the interval setting can ensure that the flow disturbing teeth are uniformly distributed, so that the flue gas can be uniformly disturbed, the flow disturbing tooth support 6 is inserted with the three-prong flow disturbing tooth 7 for auxiliary settling of flow disturbance, the three-prong flow disturbing tooth 7 generates flow disturbance to the flowing flue gas through its three-prong structure, destroys the laminar flow state of the flue gas, and makes the dust particles in the flue gas deviate from the airflow trajectory due to the inertial force, while promoting the collision and agglomeration of fine dust particles to form large particles, which is convenient for subsequent settling and interception, a fine dust interception plate 8 for intercepting floating fine dust is arranged below the flow separation plate, the fine dust interception plate 8 as a component for intercepting fine dust is used to capture fine dust particles still floating in the flue gas after the previous flow disturbance, avoiding the incomplete settling caused by the discharge of fine dust with flue gas, and the output end of the fine dust interception plate 8 is provided with an interception plate driving assembly, the interception plate driving assembly is used to provide power for the fine dust interception plate 8, drive it to generate swing action, realize the self-cleaning function, prevent dust from adhering and clogging on the surface of the interception plate, and guarantee the long-term stable interception efficiency of the interception plate.

[0029] The left side of the settler shell 1 is staggered with spoiler plates 25 below the settling section to slow down the flue gas flow. The spoiler plates 25 are staggered in structure to extend the flow path of the flue gas in the settling section, slow down the flue gas flow speed, provide sufficient time for gravity settling of dust particles in the flue gas, and further disturb the flue gas to promote dust particle agglomeration. The left side of the settler shell 1 is provided with a throat pipe mounting rack above the spoiler plates 25. The throat pipe mounting rack serves as a mounting support structure for the throat pipe 15 to position the installation position of the throat pipe 15, ensuring that the throat pipe 15 is stably fixed in the settling section to avoid displacement of the throat pipe 15 due to flue gas impact. The throat pipe mounting rack is provided with two throat pipes 15 for fine dust interception. The throat pipe 15 is a core component for deep interception of fine dust, relying on the Venturi effect to accelerate the flue gas in the converging section, stabilize the flow in the throat, and decelerate in the diverging section. The inertia force generated by the change in flow velocity separates the dust particles from the airflow, and the internal structure enhances the fine dust interception effect. The inner wall of the converging section of the throat pipe 15 is provided with a spiral retention ring 16 to form a spiral airflow. The spiral retention ring 16 guides the flue gas entering the throat pipe 15 to form a stable spiral airflow, and the centrifugal force causes the dust particles to move towards the inner wall of the throat pipe, enhancing the collision and agglomeration effect of the dust particles and improving the interception efficiency of the throat pipe 15 for fine dust.

[0030] The bottom of the settler shell 1 is provided with a shell support 2 to support it. The shell support 2 is a support component of the entire settler, which stably supports the settler shell 1 and all internal components at a predetermined height, keeps the dust collector 3 away from the ground, facilitates dust collection and discharge, and reduces the impact of ground vibration on the working stability of the settler. The bottom center of the settler shell 1 is fixed with a dust collector 3 for dust collection. The dust collector 3 collects dust particles separated by all components in the settler, guides the dust to the bottom through its conical structure, and facilitates centralized discharge to prevent dust accumulation in the settler. The dust collector 3 is provided with a spiral dust guide groove 4 to guide the dust in the dust collector 3 to slide slowly along the spiral track, avoid dust adhesion and accumulation on the inner wall of the dust collector, and control the dust discharge speed when needed to prevent a large amount of dust from being discharged instantaneously, causing secondary flying. The back of the dust collector 3 is provided with a vibrator 24 for vibration cleaning. The vibrator 24 generates high-frequency vibration and transmits it to the dust collector 3 and the spiral dust guide groove 4 inside, causing the dust adhering to the wall to fall off, ensuring smooth sliding and discharge of the dust, and preventing the dust collector from being blocked.

[0031] The back of the flue gas inlet section of the settler shell 1 is inserted with a flue gas inlet pipe, which serves as an inlet channel for the waste catalyst oxygen-rich roasting flue gas, and is used to guide the flue gas to be treated into the flue gas inlet section of the settler shell 1, providing a stable source of flue gas for subsequent settling treatment. The top side wall of the settling section of the settler shell 1 is inserted with a flue gas outlet pipe, which serves as an outlet channel for the cleaned flue gas after treatment, and is used to guide the flue gas that meets the emission standards after being treated by all the components inside the settler to be discharged, realizing the recycling or emission standard discharge of the flue gas.

[0032] The surface of the fine dust interception plate 8 is provided with a honeycomb-shaped micro-pore structure for reducing air flow resistance and intercepting fine dust. The honeycomb-shaped micro-pore structure can maximize the reduction of air flow resistance when the flue gas passes through while ensuring the fine dust interception effect, avoiding the increase of system energy consumption due to excessive resistance. At the same time, the honeycomb structure can increase the effective interception area of the interception plate and improve the capture efficiency of fine dust.

[0033] The interception plate driving assembly includes an interception plate swing piece 9 fixed to the rotating and extracting end of the fine dust interception plate 8. The interception plate swing piece 9 serves as a transmission component between the fine dust interception plate 8 and the connecting piece 11, and is used to convert the power transmitted by the connecting piece 11 into the swinging action of the fine dust interception plate 8. At the same time, the swinging angle is limited by its own structure to avoid damage caused by excessive swinging. A strip-shaped slot is formed in the interception plate swing piece 9, which provides a reserved stroke for the movement of the connecting piece 11, so that the connecting piece 11 can flexibly drive the interception plate swing piece 9 to rotate during the driving process, avoiding the phenomenon of jamming. The connecting piece 11 is connected to the interception plate swing piece 9 through the strip-shaped slot. The connecting piece 11 serves as an intermediate component for power transmission, and is used to transmit the power generated by the swing piece driver 10 to the interception plate swing piece 9, realizing the effective conduction of power. The end surface of the connecting piece 11 is provided with a swing piece driver 10, which serves as the power source of the interception plate driving assembly and is used to generate the power to drive the fine dust interception plate 8 to swing. The swing piece driver 10 is connected to the outer wall of the settler shell 1 to ensure the stability during the driving process. The swing piece driver 10 and the interception plate swing piece 9 are externally provided with a swing piece protection shell 12 for protection. The swing piece protection shell 12 is used to isolate the dust and high temperature in the flue gas from eroding the swing piece driver 10 and the interception plate swing piece 9, prevent dust from entering the transmission part to cause jamming, and reduce the impact of high temperature on the performance of the driving components, prolonging the service life of the assembly.

[0034] The throat pipe mounting frame comprises support groove plates 13 fixed to the outer walls of the two sides of the settling section of the settler shell 1, which are used to provide mounting support bases for the throat pipe supports 14 and limit the throat pipe supports 14 through their groove structures, so as to ensure the installation positions of the throat pipe supports 14 and enhance the overall structural strength of the throat pipe mounting frame. The inside of the support groove plates 13 is inserted with the throat pipe supports 14 used to support the throat pipe 15, which are used to directly bear the weight of the throat pipe 15, stably fix the throat pipe 15 on the support groove plates 13, and ensure that the throat pipe 15 remains stable under the impact of flue gas. The edges of the throat pipe 15 in contact with the inner walls of the settler shell 1 are fixed with sealing rubber strips, which are used to fill the gaps between the throat pipe 15 and the inner walls of the settler shell 1, enhance the sealing performance of the settler, prevent flue gas from leaking from the gaps, and simultaneously buffer the vibration generated by the throat pipe 15 during work, thereby reducing the impact on the shell.

[0035] The elastic throat core assembly comprises throat core frames 18 inserted in the contraction sections of the throat pipes 15, which are used to provide mounting support and positioning for the throat cores 19, butterfly springs 20 and other components, so as to ensure that all components of the elastic throat core assembly are assembled in the preset positions and guarantee the normal work of the assembly. The throat core frames 18 are provided with the throat cores 19, which are located at the throat positions of the throat pipes 15. The throat cores 19, as the core components of the elastic throat core assembly, cooperate with the elastic steel sheets 22 to realize the adjustment of the throat diameters of the throat pipes and simultaneously enhance the stability of the throat airflow and improve the fine dust interception effect. The inner walls of the throats of the throat pipes 15 are provided with a plurality of butterfly springs 20 in the circumferential direction. The butterfly springs 20 are used to provide elastic restoring force for the elastic steel sheets 22, so that the elastic steel sheets 22 remain in the initial attitude when there is no external force, and simultaneously can produce self-adaptive deformation according to the changes in flue gas pressure to drive the elastic steel sheets 22 to adjust the throat diameters of the throat pipes. The inner sides of the butterfly springs 20 are provided with steel sheet connecting pieces 21, which are used to stably connect the elastic steel sheets 22 and the butterfly springs 20, ensure that the elastic force of the butterfly springs 20 can be transmitted to the elastic steel sheets 22, and simultaneously provide guidance for the sliding of the elastic steel sheets 22. The steel sheet connecting pieces 21 are slidably connected with the elastic steel sheets 22. The elastic steel sheets 22 realize the contraction and expansion of the throat diameters of the throat pipes through sliding, the inner sides of which are in contact with the throat cores 19, which can maintain the adjustment accuracy under the limiting action of the throat cores 19 and avoid excessive adjustment. In addition, a strip-shaped groove is formed at the connection between the elastic steel sheets 22 and the steel sheet connecting pieces 21, which is used to provide a reserved stroke for the sliding of the elastic steel sheets 22, so as to ensure that the elastic steel sheets 22 can smoothly complete the extension and contraction actions and avoid being stuck between the steel sheet connecting pieces 21.

[0036] A gas collecting cover 17 is fixed below the throat pipe 15, which is used to converge the flue gas entering the throat pipe 15, so that the dispersed flue gas forms a stable gas flow beam, avoids the diffusion of the flue gas, and guides the flue gas to flow in a preset direction, thereby improving the subsequent processing efficiency.

[0037] When the present application is used:

[0038] After the flue gas of the oxygen-enriched roasting of the spent catalyst enters the flue gas inlet section on the right side of the settler shell 1 through the flue gas inlet pipe, it first forms a stable down-in and up-out flow direction under the guidance of the baffle in the center of the settler shell 1, thereby avoiding the short circuit of the flue gas. In this process, the three-pronged turbulence teeth 7 on the side wall buckle plate 5 on the opposite side of the baffle generate a turbulence effect on the flue gas through their three-pronged structure, and the three-pronged turbulence teeth 7 are stably fixed through the turbulence teeth support 6, thereby ensuring the stability of the turbulence effect. This process can destroy the laminar flow state of the flue gas, promote the dust particles to separate from the airflow trajectory due to inertia, and simultaneously push the fine dust to collide and agglomerate to form large particles.

[0039] After the flue gas is preliminarily agglomerated by turbulence, it continues to flow upwards, first passes through the turbulence plates 25 distributed in a staggered manner below the settling section on the left side of the settler shell 1, and then slows down through the extension of the flow path, thereby providing sufficient time for dust gravity settling and further strengthening the dust agglomeration effect. Subsequently, the flue gas enters the throat pipe 15 region fixed by the throat pipe mounting rack, wherein the throat pipe mounting rack is composed of a support groove plate 13 and a throat pipe support 14, thereby ensuring the stable fixation of the throat pipe 15. The sealing rubber strip at the contact edge between the throat pipe 15 and the inner wall of the settler shell 1 can prevent the leakage of flue gas. The flue gas forms a stable spiral airflow under the guidance of the spiral interception ring 16 on the inner wall of the contraction section of the throat pipe 15, and the dust particles are attracted to the inner wall of the throat pipe 15 by centrifugal force. Then, relying on the Venturi effect, the flue gas is accelerated in the contraction section of the throat pipe 15, is stable in the throat, and is decelerated in the expansion section. The inertia force generated by the change in flow velocity realizes the preliminary separation of dust and airflow. The elastic throat core assembly of the throat can self-adaptively adjust the flow diameter according to the working conditions such as flue gas flow and temperature, thereby ensuring the balance between interception efficiency and system resistance under different working conditions.

[0040] After the flue gas is deeply intercepted by the throat pipe 15, it is discharged through the upper part. In the process, the fine dust interception plate 8 below the baffle captures residual floating fine dust. The honeycomb-shaped micropores on the surface of the fine dust interception plate 8 reduce airflow resistance while ensuring interception effect. The fine dust interception plate driving assembly drives the swinging action to realize self-cleaning. The swing piece protection shell 12 can isolate dust and high-temperature protection driving assembly to avoid dust adhesion and blockage.

[0041] The dust particles separated during the whole settling process fall to the dust hopper 3 at the bottom end of the settling device shell 1 under the action of gravity. The spiral dust guide groove 4 in the dust hopper 3 guides the dust to slowly slide along the spiral track. When the dust is cleaned, the baffle below the dust hopper 3 is opened. After opening, the high-frequency vibration generated by the vibrator 24 at the back of the dust hopper 3 prevents the dust from adhering and accumulating, ensuring that the dust smoothly converges to the bottom of the dust hopper 3 and is stably discharged.

Claims

1. A compact spent catalyst oxygen-rich roasting flue gas downflow upflow settler characterized by, The utility model provides a dust catcher, including the sedimentation tank shell (1), the inside center of sedimentation tank shell (1) is provided with the baffle for forming the flow direction of the flue gas lower inlet upper outlet, the side wall of right side flue gas inlet section of sedimentation tank shell (1) is inserted with the buckle plate (5), the side wall of buckle plate (5) and baffle opposite all are fixed with a plurality of turbulence tooth support (6), insert in turbulence tooth support (6) and be used for turbulence auxiliary settlement three edge turbulence tooth (7), be provided with the fine dust intercepting plate (8) of intercepting floating fine dust below baffle, the surface of fine dust intercepting plate (8) is provided with honeycomb micro -hole, is used for reducing the airflow resistance and the interception of fine dust, the output of fine dust intercepting plate (8) is provided with intercepting plate drive assembly, and intercepting plate drive assembly includes the intercepting plate swing piece (9) of fixed in the fine dust intercepting plate (8) rotation and extraction end, the intercepting plate swing piece (9) is set with the connecting piece (11) through the strip slot of intercepting plate swing piece (9), the end surface of connecting piece (11) is provided with swing piece driver (10), swing piece driver (10) is connected with the outer wall of sedimentation tank shell (1), the outside of swing piece driver (10) and intercepting plate swing piece (9) is provided with swing piece protection shell (12) for the protection of both, the lower left side sedimentation section of sedimentation tank shell (1) is staggered with the turbulence plate (25) of slowing down flue gas flow, the left side sedimentation section of sedimentation tank shell (1) is provided with the throat pipe mounting frame above turbulence plate (25), and the throat pipe mounting frame is provided with two throat pipes (15) for fine dust interception, the inner wall of the contraction section of throat pipe (15) is provided with the spiral retention ring (16) of forming spiral airflow, the throat position of throat pipe (15) is provided with the elastic throat core assembly for reducing, and the elastic throat core assembly includes the throat core frame (18) of inserting in the contraction section of throat pipe (15), the throat core (19) is arranged between the throat core frame (18), the throat core (19) is located at the throat position of throat pipe (15), the inner wall of the throat of throat pipe (15) is provided with a plurality of butterfly springs (20) along the circumference, the inner side of butterfly spring (20) is provided with a steel sheet connecting piece (21), the elastic steel sheet (22) is slidably connected to the steel sheet connecting piece (21), the inner side of the elastic steel sheet (22) is attached to the throat core (19), and a strip slot is formed at the connection between the elastic steel sheet (22) and the steel sheet connecting piece (21).

2. A compact spent catalyst oxygen-rich roasting flue gas down-flow up-flow type settler according to claim 1, characterized in that: The lower part of the sedimentation tank shell (1) is provided with a shell support (2) for supporting it, and the bottom end center of the sedimentation tank shell (1) is fixed with an ash collector (3) for collecting ash. A spiral ash guide groove (4) is arranged in the ash collector (3). A vibrator (24) for vibrating and cleaning ash is arranged at the back of the ash collector (3). A flue gas inlet pipe is inserted into the back of the flue gas inlet section of the sedimentation tank shell (1). A flue gas outlet pipe is inserted into the top end side wall of the sedimentation section of the sedimentation tank shell (1).

3. A compact spent catalyst oxygen enriched roasting flue gas downflow upflow settler according to claim 1, characterized in that: The throat pipe mounting frame comprises support groove plates (13) fixed to the outer walls on both sides of the settling section of the settler shell (1), the inside of the support groove plates (13) is inserted with throat pipe supports (14) for mounting and supporting the throat pipe (15), and the edges of the throat pipe (15) in contact with the inner wall of the settler shell (1) are fixed with sealing rubber strips.

4. A compact spent catalyst oxygen-rich roasting flue gas downflow- upflow settler according to claim 1, characterized in that: The lower side of the throat pipe (15) is fixed with a gas collecting cover (17), and the other side of the throat pipe (15) corresponding to the gas collecting cover (17) is inserted with a flow guide grille (23).

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