Anti-coking device for settler
By installing an overflow hopper and a superheated steam fluidization loop in the settler, and using steam nozzles to control the catalyst flow path, the problem of easy coking in the settler was solved, achieving efficient gas-solid separation and stable operation of the device, extending its service life and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG SHTAR SCI & TECH PETROCHEMICAL CO LTD
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-21
AI Technical Summary
Existing settling tanks are prone to coking, resulting in low operating efficiency of catalytic cracking units, and existing mitigation measures have limited effectiveness.
An overflow hopper and a superheated steam fluidization loop are installed in the settler. The catalyst flow path is controlled by a steam nozzle. The superheated steam fluidization loop and nozzles are used to prevent catalyst accumulation and coking. This is combined with a flow regulation and a tortoise shell mesh protection structure.
It effectively reduces oil and gas entrainment, improves gas-solid separation efficiency, prevents catalyst accumulation and coking, extends the service life of the unit, reduces maintenance costs, and ensures stable operation of the unit.
Smart Images
Figure CN224141531U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of settling plate technology, and in particular to a settling plate anti-coking device. Background Technology
[0002] In the petrochemical industry, catalytic cracking units are the core process equipment for realizing the conversion of heavy oil into lighter oil, and their operational stability directly affects the economic benefits and safe production of refineries. As a key component of the catalytic cracking unit, the settling tank is responsible for the efficient separation of reactant oil and gas from the catalyst. However, for a long time, coking inside the settling tank has been a persistent technical challenge restricting the long-term stable operation of the unit.
[0003] Currently, industrial applications commonly use coarse cyclone separators (coarse cyclones) as the core equipment for gas-solid separation in settling tanks. Their working principle utilizes centrifugal force to achieve preliminary separation of oil and gas from the catalyst. The separated catalyst returns to the bottom of the settling tank via the feed leg. Traditional coarse cyclones are typically designed with an anti-reverse cone bottom structure, which has significant drawbacks: First, the opening size of the anti-reverse cone bottom is large (generally exceeding 1.2 meters), resulting in insufficient catalyst level in the feed leg and excessively fast catalyst descent speed (flow velocity reaching 3-5 m / s), entraining a large amount of insufficiently separated oil and gas into the settling tank body. Second, the anti-reverse cone structure lacks fluidization control mechanisms, easily causing the catalyst to form a "dead bed" at the bottom of the feed leg, losing its cyclone separation function. Third, a large annular space (radial gap reaching 200-300 mm) exists between the anti-reverse cone and the inner wall of the settling tank, forming an oil and gas retention zone and providing thermodynamic conditions for coking.
[0004] The aforementioned defects can lead to a complex coking mechanism inside the settling tank: the separated oil and gas undergo a secondary reaction in a high-temperature environment (480-520℃), and the resulting condensate combines with the fine catalyst powder to form coke nuclei; the outer wall of the coarse swirl leg, the tensioning support structure, and the dead zone at the top of the settling tank become high-risk areas for coking due to fluid retention; the coking products fall off under periodic temperature fluctuations and airflow impacts, which may block key equipment such as the waiting valve and the regeneration inclined tube, causing unplanned shutdowns.
[0005] Currently, technicians typically alleviate coking problems by optimizing operating parameters (such as lowering the reaction temperature and increasing the stripping steam volume) and improving materials (such as using high-temperature resistant coatings), but the effects are limited. For example, lowering the reaction temperature from 510℃ to 495℃ reduces the coking rate, but also decreases the light oil yield by 1.8 percentage points, affecting the operating efficiency of the catalytic cracking unit and resulting in poor economic benefits. Utility Model Content
[0006] The purpose of this invention is to overcome the shortcomings of existing settling devices, such as easy coking and low operating efficiency of catalytic cracking units, and to provide a settling device to prevent coking.
[0007] This utility model is achieved through the following technical solution: a settling device for preventing coking, comprising an overflow hopper, which is located at the bottom of a coarse swirl leg and at the bottom of the settling device; an upper overflow port is provided at the top of the overflow hopper, and a lower overflow port is provided at the bottom of the overflow hopper above the stripping section of the settling device; the lower part of the coarse swirl leg extends into the interior of the overflow hopper through the upper overflow port; a superheated steam fluidizing ring pipe is provided at the bottom of the overflow hopper, and several nozzles are provided on the superheated steam fluidizing ring pipe; a steam pipeline is connected to the superheated steam fluidizing ring pipe, one end of the steam pipeline is connected to the superheated steam fluidizing ring pipe, and the other end of the steam pipeline passes through the overflow hopper and is connected to a fluidized steam inlet located at the top of the settling device, wherein the fluidized steam inlet is used to connect to the steam delivery pipeline of the catalytic device.
[0008] This invention effectively controls the catalyst flow path and reduces oil and gas entrainment by setting an overflow hopper at the bottom of the coarse swirl leg; the design of the superheated steam fluidization ring pipe and nozzle can use superheated steam to fluidize the catalyst, preventing catalyst accumulation and coking; the steam pipeline is connected to the fluidization steam inlet, which can conveniently introduce steam into the catalytic unit and ensure the normal operation of the unit.
[0009] A further improvement of this utility model is that the overflow hopper, the coarse swirling material leg, and the superheated steam fluidizing ring pipe are arranged coaxially, and an interval space is formed between the inner wall of the overflow hopper and the outer wall of the coarse swirling material leg, as well as between the inner wall of the overflow hopper and the outer wall of the superheated steam fluidizing ring pipe.
[0010] The overflow hopper, coarse swirling feed leg, and superheated steam fluidization ring pipe of this invention are arranged coaxially to ensure uniform flow of catalyst and uniform steam injection in the overflow hopper, which is beneficial to improving gas-solid separation effect and fluidization quality, and reducing the possibility of local coking; at the same time, the space between each component can provide a certain buffer and flow channel to avoid catalyst blockage and poor airflow.
[0011] A further improvement of this utility model is that the overflow hopper includes a cylindrical part located at the top and a conical part located at the bottom. The lower end of the cylindrical part is fixedly connected to the bottom of the conical part. The inner diameter r of the cylindrical part is 1.4m and the depth h is 1.3m.
[0012] The cylindrical and conical structure design of the overflow hopper described in this utility model, combined with specific inner diameter and depth dimensions, is determined based on the throughput of the catalytic cracking unit and the flow characteristics of the catalyst. This design helps the catalyst to flow smoothly and accumulate properly, eliminates dead zones, and improves the separation efficiency and anti-coking capability of the unit.
[0013] A further improvement of this utility model is that the overflow hopper is connected to the coarse swirling feed leg and the superheated steam fluidizing ring pipe respectively through a supporting angle steel. One end of the supporting angle steel is connected to the inner wall of the overflow hopper, and the other end of the supporting angle steel is connected to the outer wall of the coarse swirling feed leg or the outer wall of the superheated steam fluidizing ring pipe.
[0014] The connection method of the supporting angle steel described in this utility model ensures the relative position stability between the overflow hopper, the coarse swirling leg and the superheated steam fluidization ring pipe, enhances the overall structural strength of the device, enables it to withstand catalyst impact and steam pressure, and extends its service life.
[0015] A further improvement of this utility model is that the nozzle diameter is Φ18×4mm, and there are sixty nozzles. The sixty nozzles are evenly arranged at the bottom of the superheated steam fluidization ring pipe, and the nozzles spray in a downward direction.
[0016] The use of nozzles with specific diameter, quantity, and arrangement, and spraying downwards at an angle, ensures that the steam effectively agitates the catalyst, allowing it to fully fluidize, preventing accumulation and coking, and significantly improving the anti-coking effect of the unit.
[0017] A further improvement of this utility model is that the fluidizing steam inlet is equipped with a flow regulating valve, which is used to control the fluidizing steam flow rate to 0.5 t / h.
[0018] This invention precisely controls the flow rate of fluidized steam at 0.5 t / h by setting a flow regulating valve at the fluidized steam inlet. This flow rate is determined based on the processing scale of the catalytic cracking unit and the fluidization requirements of the catalyst, which can enable the catalyst to reach the optimal fluidization state, improve the unit's operating efficiency and anti-coking performance.
[0019] A further improvement of this utility model is that the inner wall of the overflow hopper and the outer wall of the steam pipeline are both provided with a tortoise shell mesh, and the tortoise shell mesh is provided with a wear-resistant lining.
[0020] The hexagonal mesh and wear-resistant lining design of the inner wall of the overflow hopper and the outer wall of the steam pipeline described in this utility model can effectively resist the erosion and wear of the catalyst, protect the internal structure of the device, extend its service life, and reduce maintenance costs.
[0021] A further improvement of this utility model is that a maintenance manhole is provided on one side of the overflow hopper.
[0022] The manhole design on one side of the overflow hopper of this utility model provides convenience for internal inspection and maintenance of the device, enabling timely troubleshooting and problem solving, and ensuring normal operation and long-term stability of the device.
[0023] A further improvement of this utility model is that the diameter of the superheated steam fluidizing ring pipe is 80mm, and the steam pipeline model is Φ89mm.
[0024] The diameter of the superheated steam fluidization loop and the model of the steam pipeline, determined based on the steam flow and pressure requirements, can ensure smooth steam delivery and injection, meet the fluidization requirements of the unit, and improve the performance of the unit.
[0025] A further improvement of this invention is that the bottom surface of the superheated steam fluidized loop pipe is provided with a condensate drain hole for discharging condensate.
[0026] The condensate drain hole on the bottom surface of the superheated steam fluidization ring pipe of this invention can drain condensate, preventing it from affecting the steam injection effect, ensuring that the steam effectively fluidizes the catalyst, and improving the anti-coking performance of the device.
[0027] As can be seen from the above technical solutions, the beneficial effects of this utility model are:
[0028] 1. This utility model rationally controls the catalyst flow path through an overflow hopper to reduce oil and gas entrainment; utilizes superheated steam fluidization ring pipe and nozzles to fully fluidize the catalyst, preventing accumulation and coking; precisely controls the fluidization steam flow rate, combined with condensate drain holes to discharge condensate, ensuring effective steam injection and comprehensively improving the anti-coking effect.
[0029] 2. The coaxial arrangement of all components ensures uniform catalyst flow and uniform steam injection. The cylindrical and conical overflow hoppers, combined with specific dimensions, facilitate smooth catalyst flow and accumulation, avoid dead zones, and improve separation efficiency. The supporting angle steel connection enhances structural strength and extends the service life of the unit.
[0030] 3. The maintenance manhole located on one side of the overflow hopper facilitates the inspection and maintenance of the internal parts of the device by the staff, enabling timely detection and handling of problems, and ensuring the normal operation and long-term stability of the device.
[0031] 4. The hexagonal mesh and wear-resistant lining installed on the inner wall of the overflow hopper and the outer wall of the steam pipeline can effectively resist catalyst erosion and wear, reducing maintenance costs; the reasonable pipe diameter and model design can ensure smooth steam delivery, meet fluidization requirements, improve unit performance, and reduce operating energy consumption. Attached Figure Description
[0032] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0033] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.
[0034] Figure 2 This is a top view of the overflow hopper according to a specific embodiment of this utility model.
[0035] Figure 3 This is a schematic diagram of the overflow hopper and the superheated steam fluidizing ring pipe in a specific embodiment of this utility model.
[0036] Figure 4 This is a schematic diagram of the cylindrical and conical portions of a specific embodiment of this utility model.
[0037] Figure 5 This is a schematic diagram of the structure of the tortoise shell mesh and wear-resistant lining in a specific embodiment of this utility model.
[0038] Figure 6 This is a schematic diagram of the manhole structure according to a specific embodiment of the present invention.
[0039] In the diagram: 1. Overflow hopper; 101. Upper overflow outlet; 102. Lower overflow outlet; 103. Hexagonal mesh; 104. Wear-resistant lining; 105. Cylindrical section; 106. Conical section; 2. Coarse swirl leg; 3. Settler; 4. Superheated steam fluidizing loop; 401. Nozzle; 402. Drainage hole; 5. Steam pipeline; 6. Fluidizing steam inlet; 601. Support component; 602. Flow regulating valve; 7. Support angle steel; 8. Maintenance manhole; 9. Settler stripping section; 10. Regenerator. Detailed Implementation
[0040] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0041] Please refer to the attached document. Figure 1 and 2The following is a description of a specific embodiment: The anti-coking device for a settling tank according to this utility model includes an overflow hopper 1, which is located below the coarse swirl leg 2 and at the bottom of the settling tank 3. An upper overflow port 101 is provided at the top of the overflow hopper 1, and a lower overflow port 102 is provided at the bottom of the overflow hopper 1, located above the stripping section 9 of the settling tank. The lower part of the coarse swirl leg 2 extends into the overflow hopper 1 through the upper overflow port 101. An overheating device is provided at the bottom of the overflow hopper 1. A steam fluidizing loop 4 is provided with several nozzles 401. The superheated steam fluidizing loop 4 is connected to a steam pipeline 5. One end of the steam pipeline 5 is connected to the superheated steam fluidizing loop 4, and the other end of the steam pipeline 5 passes through the overflow hopper 1 and is connected to the fluidized steam inlet 6 provided on the upper part of the settler 3. The fluidized steam inlet 6 is used to connect the steam delivery pipeline of the catalytic device, and the steam pipeline 5 is arranged along the inner wall of the settler 3 through the support member 601.
[0042] In conjunction with the existing catalytic cracking unit, a settling stripping section 9 is provided at the bottom of the settling tank 3, and the bottom of the settling tank 3 and the settling stripping section 9 are located inside the regenerator 10. During the operation of the catalytic cracking unit, the reactant oil and gas and the catalyst undergo preliminary separation in the coarse swirl leg 2. The separated catalyst enters the overflow hopper 1 through the overflow port 101 at the bottom of the coarse swirl leg 2. At this time, superheated steam from the steam delivery pipeline of the catalytic unit enters the superheated steam fluidized loop 4 through the fluidized steam inlet 6 and the steam pipeline 5, and is then sprayed out from the nozzle 401 on the loop 4.
[0043] The overflow hopper 1 design alters the catalyst flow path, effectively reducing oil and gas entrainment and lowering the likelihood of secondary reactions and coking within the settler 3. The injection of superheated steam keeps the catalyst in a fluidized state, preventing catalyst buildup and the formation of a dead bed, further preventing coking and ensuring stable operation of the unit.
[0044] For details, please refer to the appendix. Figure 1 The overflow hopper 1, the coarse swirling material leg 2, and the superheated steam fluidizing ring pipe 4 are arranged coaxially, and a space is formed between the inner wall of the overflow hopper 1 and the outer wall of the coarse swirling material leg 2, as well as between the inner wall of the overflow hopper 1 and the outer wall of the superheated steam fluidizing ring pipe 4.
[0045] Because the overflow hopper 1, the coarse swirl feed leg 2, and the superheated steam fluidization ring pipe 4 are arranged coaxially, the catalyst, after entering the overflow hopper 1 from the coarse swirl feed leg 2, can flow downwards along a uniform annular space. Simultaneously, superheated steam is uniformly injected from the nozzles 401 on the ring pipe, providing omnidirectional fluidization to the catalyst. The spaces formed between the components provide buffers and channels for the flow of catalyst and steam.
[0046] This coaxial arrangement and spaced design ensures uniform flow of the catalyst and uniform steam injection within the overflow hopper 1, improving gas-solid separation efficiency, allowing the catalyst to come into more complete contact with the steam, enhancing fluidization quality, reducing the risk of localized coking, and extending the operating cycle of the unit.
[0047] For details, please refer to the appendix. Figure 1 The overflow hopper 1 is connected to the coarse swirling leg 2 and the superheated steam fluidizing ring pipe 4 respectively through the supporting angle steel 7. One end of the supporting angle steel 7 is connected to the inner wall of the overflow hopper 1, and the other end of the supporting angle steel 7 is connected to the outer wall of the coarse swirling leg 2 or the outer wall of the superheated steam fluidizing ring pipe 4.
[0048] The supporting angle steel 7 connects the overflow hopper 1 to the coarse swirling leg 2 and the superheated steam fluidization ring pipe 4 respectively. During the operation of the device, when the catalyst impact and steam pressure act on each component, the supporting angle steel 7 can withstand these forces and maintain the relative position stability between each component.
[0049] This stable connection method enhances the overall structural strength of the device, enabling it to withstand greater impact and pressure, making it less prone to deformation and damage, extending its service life, and reducing unplanned downtime and maintenance costs caused by structural damage.
[0050] In one embodiment, refer to the appendix Figure 1 The overflow hopper 1 includes a cylindrical portion 105 located at the top and a conical portion 106 located at the bottom. The lower end of the cylindrical portion 105 is fixedly connected to the bottom of the conical portion 106. The inner diameter r of the cylindrical portion 105 is 1.4m and the depth h is 1.3m.
[0051] Since the overflow hopper 1 has a cylindrical structure with a conical bottom, the cylindrical part 105 provides a large capacity after the catalyst enters the overflow hopper 1, facilitating the initial accumulation and buffering of the catalyst. The conical part 106 guides the catalyst to flow towards the lower overflow port 102 above the stripping section 9 of the settler. The dimensions of the inner diameter r and depth h are determined according to the throughput of the catalytic cracking unit and the flow characteristics of the catalyst, ensuring that the catalyst flows at an appropriate speed and state.
[0052] The structure and size design of the overflow hopper 1 facilitates the smooth flow and accumulation of the catalyst, avoids the formation of dead zones in the catalyst within the overflow hopper 1, and enables the catalyst to enter the subsequent stripping section uniformly, thereby improving the separation efficiency of the unit, reducing the possibility of coking, and thus enhancing the performance of the entire catalytic cracking unit.
[0053] In one embodiment, refer to the appendix Figure 3The nozzle 401 has a diameter of Φ18×4mm, and there are sixty nozzles 401. The sixty nozzles 401 are evenly arranged at the bottom of the superheated steam fluidization ring pipe 4, and the nozzles 401 spray in a downward direction.
[0054] Sixty nozzles 401 with a diameter of Φ18×4mm are evenly arranged at the bottom of the superheated steam fluidization ring pipe 4 and spray in an oblique downward direction. After the superheated steam is ejected from the nozzles 401 at a certain pressure and speed, a uniform steam flow field is formed, which disturbs the catalyst below.
[0055] This arrangement and injection method ensures that the steam effectively agitates the catalyst, allowing it to fully fluidize and preventing catalyst from clumping together and forming agglomerates. Fully fluidized catalyst can better contact the steam, improving gas-solid mass transfer efficiency and further preventing coking, thus enhancing the anti-coking effect of the unit.
[0056] In one embodiment, the fluidizing steam inlet 6 is equipped with a flow regulating valve 602, which is used to control the fluidizing steam flow rate to 0.5 t / h.
[0057] The flow regulating valve 602 at the fluidizing steam inlet 6 precisely controls the fluidizing steam flow rate to 0.5 t / h according to the processing scale of the catalytic cracking unit and the fluidization requirements of the catalyst. The appropriate flow rate of steam enters the superheated steam fluidization loop 4 through the steam pipeline 5, and then is sprayed out by the nozzle 401 to act on the catalyst.
[0058] This precise flow control ensures the catalyst is in its optimal fluidization state. Excessive steam flow prevents the catalyst from becoming excessively agitated, affecting separation efficiency, while insufficient steam flow prevents incomplete fluidization and catalyst buildup. This improves the unit's operating efficiency and anti-coking performance, ensuring stable operation.
[0059] In one embodiment, refer to the appendix Figure 4 The inner wall of the overflow hopper 1 and the outer wall of the steam pipeline 5 are both provided with a tortoise shell mesh 103, and the tortoise shell mesh 103 is provided with a wear-resistant lining 104.
[0060] During operation, the catalyst continuously erodes the inner wall of the overflow hopper 1 and the outer wall of the steam pipeline 5. The presence of the hexagonal mesh 103 and the wear-resistant lining 104 helps to withstand the erosion force of the catalyst. The hexagonal mesh 103 also serves to fix the wear-resistant lining 104, ensuring that the wear-resistant lining 104 is firmly attached to the surface of the components and resists catalyst wear.
[0061] This design effectively protects the internal structure of the device, reduces component damage caused by catalyst erosion and wear, extends the service life of the device, reduces the cost of equipment replacement and maintenance, and improves the reliability and economy of the device.
[0062] In one embodiment, refer to the appendix Figure 5 An inspection manhole 8 is provided on one side of the overflow hopper 1.
[0063] When it is necessary to inspect, clean or repair the inside of the overflow hopper 1, the maintenance manhole 8 located on one side of the overflow hopper 1 can be opened, and the staff can directly enter the inside of the overflow hopper 1 to carry out the operation.
[0064] The installation of the maintenance manhole 8 greatly facilitates the maintenance of the unit, enabling timely detection and handling of internal problems such as catalyst agglomeration and nozzle 401 blockage, ensuring the normal operation and long-term stability of the unit, and reducing production interruptions and losses caused by equipment failures.
[0065] In one embodiment, the diameter of the superheated steam fluidizing loop 4 is 80 mm, and the steam pipeline 5 is Φ89 mm.
[0066] The diameter of the superheated steam fluidized loop 4, determined based on steam flow and pressure requirements, is 80 mm, and the steam pipeline 5 is Φ89 mm. This pipe diameter and model ensure that the steam has suitable flow rate and pressure during transportation. Steam enters the steam pipeline 5 from the fluidized steam inlet 6, then smoothly enters the superheated steam fluidized loop 4, and finally is ejected from the nozzle 401.
[0067] This appropriate pipe diameter and model design ensures smooth steam delivery and injection, enabling the steam to fluidize the catalyst according to design requirements, meeting the fluidization needs of the unit, improving the unit's performance and efficiency, and ensuring stable operation of the unit.
[0068] In one embodiment, refer to the appendix Figure 3 The bottom surface of the superheated steam fluidized loop 4 is provided with a condensate drain hole 402 for discharging condensate.
[0069] During the superheated steam transport process, condensate will be generated in the superheated steam fluidization loop 4 due to temperature changes and other factors. The condensate drain hole 402 located at the bottom of the loop can drain this condensate in a timely manner, preventing condensate from accumulating in the loop.
[0070] By draining the condensate, its impact on the steam injection effect can be prevented, ensuring that steam can be ejected from nozzle 401 at a stable pressure and flow rate, effectively fluidizing the catalyst, improving the anti-coking performance of the unit, and ensuring the normal operation of the unit.
[0071] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A settling device anti-coking device comprising an overflow hopper (1), characterized in that, An overflow hopper (1) is located at the bottom of the coarse swirl leg (2) and at the bottom of the settling tank (3). An upper overflow port (101) is provided at the top of the overflow hopper (1), and a lower overflow port (102) is provided at the bottom of the overflow hopper (1) above the stripping section (9) of the settling tank. The lower part of the coarse swirl leg (2) extends into the overflow hopper (1) through the upper overflow port (101). A superheated steam fluidization ring is provided at the bottom of the overflow hopper (1). (4) Several nozzles (401) are provided on the superheated steam fluidized loop (4); the superheated steam fluidized loop (4) is connected to a steam pipeline (5), one end of the steam pipeline (5) is connected to the superheated steam fluidized loop (4), and the other end of the steam pipeline (5) passes through the overflow hopper (1) and is connected to the fluidized steam inlet (6) provided on the upper part of the settler (3). The fluidized steam inlet (6) is used to connect the steam delivery pipeline of the catalytic device.
2. A device for preventing clinker formation in a settler according to claim 1, characterized in that The overflow hopper (1), the coarse swirling material leg (2), and the superheated steam fluidization ring pipe (4) are arranged coaxially, and a space is formed between the inner wall of the overflow hopper (1) and the outer wall of the coarse swirling material leg (2), as well as between the inner wall of the overflow hopper (1) and the outer wall of the superheated steam fluidization ring pipe (4).
3. A device for preventing the coking of a settler according to claim 1 or 2, characterized in that The overflow hopper (1) includes a cylindrical part (105) located above and a conical part (106) located below. The lower end of the cylindrical part (105) is fixedly connected to the bottom of the conical part (106). The inner diameter r of the cylindrical part (105) is 1.4m and the depth h is 1.3m.
4. A device for preventing clinker formation in a settler according to claim 3, characterized in that The overflow hopper (1) is connected to the coarse swirling leg (2) and the superheated steam fluidization ring pipe (4) respectively through the supporting angle steel (7). One end of the supporting angle steel (7) is connected to the inner wall of the overflow hopper (1), and the other end of the supporting angle steel (7) is connected to the outer wall of the coarse swirling leg (2) or the outer wall of the superheated steam fluidization ring pipe (4).
5. A device for preventing clinkering in a settler according to claim 4, characterized in that The nozzle (401) has a diameter of Φ18×4mm. There are sixty nozzles (401). The sixty nozzles (401) are evenly arranged at the bottom of the superheated steam fluidized ring pipe (4), and the nozzles (401) spray in a downward direction.
6. A device for preventing clinkering in a settler according to claim 5, characterized in that The fluidized steam inlet (6) is equipped with a flow regulating valve (602), which is used to control the flow rate of fluidized steam to 0.5t / h.
7. A device for preventing clinkering in a settler according to claim 6, characterized in that The inner wall of the overflow hopper (1) and the outer wall of the steam pipeline (5) are both provided with a tortoise shell mesh (103), and a wear-resistant lining (104) is provided on the tortoise shell mesh (103).
8. A device for preventing clinker formation in a settler according to claim 7, characterized in that An inspection manhole (8) is provided on one side of the overflow hopper (1).
9. A device for preventing clinkering in a settler according to claim 8, characterized in that The diameter of the superheated steam fluidized loop (4) is 80 mm, and the steam pipeline (5) is Φ89 mm.
10. A device for preventing clinker formation in a settler according to claim 9, characterized in that The bottom surface of the superheated steam fluidized loop (4) is provided with a condensate drain hole (402) for draining condensate.