An array settling device for phosphorus pentoxide production

Abstract

This utility model discloses an array-type settling device for phosphorus pentoxide production, comprising multiple settling towers and a conveyor installed at the bottom of the settling towers. Each settling tower includes a top plate, a tower body, and a hopper. An outlet pipe is installed on the top plate, and an inlet pipe is installed on the upper part of the tower body. A regulating box is installed between the outlet pipe and the inlet pipe, and an inlet regulating mechanism is installed inside the regulating box. A settling separation cylinder is coaxially installed inside the tower body. A contraction cone sealed to the top plate is installed on the top of the settling separation cylinder. A spiral separation plate is installed on the outside of the settling separation cylinder. A turbulence-inducing component is installed inside the settling separation cylinder. A discharge pipe is detachably installed between the hopper and the conveyor, and a star-shaped discharge valve is installed on the discharge pipe. A material discharge mechanism is installed inside the discharge pipe above the new discharge valve. This device not only maintains the effect and efficiency of phosphorus pentoxide flue gas settling within the settling towers but also avoids the phenomenon of discharge pipe blockage.

Description

Technical Field

[0001] This utility model belongs to the field of phosphorus chemical production technology, specifically relating to an array-type sedimentation device for the production of phosphorus pentoxide. Background Technology

[0002] Phosphorus pentoxide is a commonly used raw material and reagent in the chemical industry, widely applied in various fields. High-quality phosphorus pentoxide can also be used to produce high-purity phosphoric acid of various concentrations, especially polyphosphoric acid. Currently, the industrial preparation of phosphorus pentoxide generally adopts the oxidative combustion method: using yellow phosphorus as raw material, the yellow phosphorus is heated and melted and then added to a phosphorus combustion tower. Dry air is passed into the phosphorus combustion tower to react and burn with the yellow phosphorus, generating phosphorus pentoxide flue gas. The phosphorus pentoxide flue gas is then cooled and settled to produce the finished phosphorus pentoxide product. Typically, phosphorus pentoxide flue gas is obtained through a phosphorus combustion tower, cooled by multiple cooling towers (in series), and further cooled by multiple settling towers (in series). These settling towers are arranged in multiple rows, with a screw conveyor at the bottom of each row for easy discharge. Current technology uses gravity settling, which has the following drawbacks: First, phosphorus pentoxide particles in the flue gas are difficult to separate, resulting in poor settling efficiency. Furthermore, the flow rate of phosphorus pentoxide flue gas entering the settling tower is unstable, leading to uneven flow after the upper stage of settling, which affects the settling efficiency of the next stage. Second, the phosphorus pentoxide separated during settling easily clogs the lower part of the settling tower, causing slow discharge or blockage, severely impacting production efficiency. Therefore, developing an array-type settling device for phosphorus pentoxide production with a reasonable structural design, adjustable air intake, less prone to blockage, and capable of effectively improving production efficiency is objectively necessary. Summary of the Invention

[0003] The purpose of this utility model is to provide an array-type sedimentation device for phosphorus pentoxide production with reasonable structural design, adjustable air intake, easy material discharge and good clogging, which can effectively improve production efficiency.

[0004] The purpose of this utility model is achieved as follows: it includes multiple settling towers connected in series and a conveyor installed at the bottom of the settling towers. Each settling tower includes a top plate, a tower body, and a hopper arranged sequentially from top to bottom. An air outlet pipe is provided on the top plate, and an air inlet pipe is provided on the upper part of the tower body. An regulating box is provided between the air outlet pipe and the air inlet pipe, and an air inlet regulating mechanism is provided inside the regulating box. A settling separation cylinder is coaxially installed inside the tower body. The diameter of the settling separation cylinder gradually decreases from top to bottom. A contraction cone that is sealed and connected to the top plate is installed on the top of the settling separation cylinder. The air outlet pipe is located on the inner side of the top of the contraction cone. A spiral separation plate is installed on the outer side of the settling separation cylinder. A turbulence component is provided inside the settling separation cylinder. A discharge pipe is detachably installed between the hopper and the conveyor. A star-shaped discharge valve is installed on the discharge pipe. A material discharge mechanism is installed in the discharge pipe above the star-shaped discharge valve.

[0005] Compared with existing technologies, the advantages of this device are as follows: First, the internal structure of the settling tower has been modified and upgraded. Internal components such as a settling separation cylinder, spiral separation plate, turbulence-inducing assembly, and contraction cone are installed inside the settling tower. These components can change the flow velocity and direction of phosphorus pentoxide flue gas within the settling tower, prolonging the residence time of the phosphorus pentoxide flue gas and allowing for thorough separation and treatment of phosphorus pentoxide particles in the flue gas, effectively improving the settling effect of phosphorus pentoxide flue gas. Simultaneously, this device is equipped with an air intake regulating mechanism at the air inlet pipe of the settling tower. This mechanism can adjust the air intake volume of phosphorus pentoxide flue gas entering the settling tower, allowing for more efficient separation of phosphorus pentoxide particles. The stable and uniform flow rate of phosphorus pentoxide flue gas ensures that the settling effect and efficiency of phosphorus pentoxide flue gas in the settling tower are maintained, further improving the settling and separation effect of phosphorus pentoxide. Secondly, this device optimizes the connection structure between the settling tower and the conveyor. The material unloading mechanism installed in the feed pipe can move the phosphorus pentoxide accumulated in the feed pipe, loosening it and allowing it to flow downwards. At this time, the star-shaped discharge valve installed in the feed pipe can evenly and continuously guide the phosphorus pentoxide particles into the conveyor, thus avoiding the phenomenon of feed pipe blockage and ensuring the stability of feeding and conveying. It can significantly improve production efficiency and has the advantages of reasonable structure, stable air intake, stable feeding and smooth production, making it easy to promote and use. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0007] Figure 2 This is a schematic diagram of the settling tower 1 in this utility model;

[0008] Figure 3 This is a schematic diagram of the structure of the regulating box 4 in this utility model;

[0009] Figure 4for Figure 4 An enlarged schematic diagram of part A in the middle;

[0010] Figure 5 This is a front view of the feed tube 5 in this utility model;

[0011] Figure 6 This is a side view of the feed tube 5 in this utility model;

[0012] In the diagram: 1-Settling tower, 11-Top plate, 12-Tower body, 13-Feeding hopper, 14-Air outlet pipe, 15-Settling separation cylinder, 16-Contraction cone, 17-Spiral separation plate, 18-Isolation cone, 19-Turbulence cone, 110-Turbulence cone, 2-Conveyor, 3-Air inlet pipe, 4-Regulating box, 41-Fixed plate, 42-Regulating plate, 43-Air inlet, 44-Regulating hole, 45-Regulating screw, 46- Lifting rod sleeve, 47-First motor, 48-Slide plate, 49-Mounting block, 410-Fixing box, 411-Slide groove, 412-Limiting rod, 413-Limiting block, 414-Limiting box, 415-Moving plate, 416-Spring, 5-Discharge pipe, 51-Star discharge valve, 52-Discharge shaft, 53-Second motor, 54-Discharge rod, 55-Shaft sleeve, 56-Guide groove, 57-Guide shaft, 58-Discharge plate. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0014] like Figures 1-6As shown, this utility model includes multiple settling towers 1 connected in series and a conveyor 2 installed at the bottom of the settling towers 1. The settling towers 1 connected in series adopt a structure with multiple rows arranged vertically. The conveyor 2 adopts the screw conveyor structure used in the prior art. Each settling tower 1 includes a top plate 11, a tower body 12, and a discharge hopper 13 arranged from top to bottom. The discharge hopper 13 has a conical structure with a larger upper end and a smaller lower end. An air outlet pipe 14 is provided on the top plate 11, and an air inlet pipe 3 is provided on the upper part of the tower body 12. An regulating box 4 is provided between the air outlet pipe 14 and the air inlet pipe 3. An air inlet regulating mechanism is provided inside the regulating box 4. A settling separator 15 is coaxially installed inside the tower body 12. The diameter of the settling separator 15 gradually decreases from top to bottom. A contraction cone 16, which is sealed to the top plate 11, is installed at the top of the settling separator 15. The vent pipe 14 is located inside the top of the contraction cone 16. A spiral separation plate 17 is installed on the outside of the settling separator 15. A turbulence evacuation assembly is provided inside the settling separator 15. A discharge pipe 5 is detachably installed between the discharge hopper 13 and the conveyor 2. A star-shaped discharge valve 51 is installed on the discharge pipe 5. A material discharge mechanism is installed inside the discharge pipe 5 above the star-shaped discharge valve 51.

[0015] The working process of this device is as follows: Phosphorus pentoxide flue gas enters the regulating box 4 through the outlet pipe 104. After entering the regulating box 4, the inlet regulating mechanism can adjust the flow rate of the phosphorus pentoxide flue gas. After being regulated by the inlet regulating structure, the phosphorus pentoxide flue gas enters the tower body 12 through the inlet pipe 3. Since the tower body 12 is equipped with a settling separator 15, the settling separator 15 forms a curved channel from top to bottom and then from bottom to top within the tower body 12. When the phosphorus pentoxide flue gas enters the tower body 12, under the guiding action of the spiral separation plate 17, the phosphorus pentoxide flue gas spirals downward in the annular space between the settling separator 15 and the tower body 12. During this process, some particles in the phosphorus pentoxide flue gas are thrown to the sides and fall down along the inner wall of the tower body 12 into the feed hopper 13. The phosphorus pentoxide flue gas flow changes direction after passing through the spiral separation plate 17. The phosphorus pentoxide flue gas then enters from the bottom of the settling separator 15 and flows upward inside the settling separator 15. Under the obstruction of the turbulence component, the flow direction of the phosphorus pentoxide flue gas changes multiple times. It continuously rises and twists within the settling separator 15 and collides with the turbulence component, separating the particles in the phosphorus pentoxide flue gas again, causing them to fall into the feed hopper 13. The final phosphorus pentoxide flue gas is collected by the contraction cone 16 and discharged from the exhaust pipe 14. The phosphorus pentoxide particles falling into the feed hopper 13 enter the feed pipe 5. The material dispersing mechanism in the feed pipe 5 can move the phosphorus pentoxide accumulated in the feed pipe 5, loosening it and allowing it to flow downward. At this time, the star-shaped discharge valve 51 in the feed pipe 5 can evenly and continuously guide the phosphorus pentoxide particles into the conveyor 2. This can avoid the phenomenon of blockage in the feed pipe 5, ensure the stability of feeding and conveying, and effectively improve production efficiency.

[0016] Furthermore, the intake adjustment mechanism includes a fixed plate 41 and an adjusting plate 42. The fixed plate 41 is installed inside the adjustment box 4 and can be detachably installed inside the adjustment box 41. Doors are provided at both ends of the adjustment box 4 for easy access to clean and maintain its internal components. The fixed plate 41 has multiple air intake holes 43. The adjusting plate 42 is movably mounted on the side of the fixed plate 41 near the outlet end of the intake pipe 3. The adjusting plate 42 has multiple adjusting holes 44 corresponding to the air intake holes 43. A lifting adjuster connected to the top of the adjusting plate 42 is installed on the top of the adjustment box 4. The regulating plate 42 can be raised and lowered, causing the regulating hole 44 on the regulating plate 42 to be misaligned with the air inlet 43. By adjusting the misalignment of the regulating hole 44 and the air inlet 43, the flow rate of phosphorus pentoxide flue gas entering the air inlet pipe 3 can be adjusted. The lifting regulator includes an adjusting screw 45, a lifting rod sleeve 46, a first motor 47, and a sliding plate 48. The first motor 47 is a structure used in the prior art, and a finished product can be directly purchased according to the power required. The top of the regulating plate 42 is machined with an installation groove, and the lower end of the lifting rod sleeve 46 is equipped with an installation block 49. The installation block 49 is installed in the installation groove by a limiting component. The top of the regulating box 4 is equipped with... The fixed box 410 has the upper end of the lifting rod sleeve 46 slidably mounted on the top of the adjusting box 4 and extending into the fixed box 410. The side wall of the fixed box 410 has symmetrically arranged sliding grooves 411. The sliding plate 48 is mounted on the upper end of the lifting rod sleeve 46 and slides in cooperation with the sliding grooves 411. An adjusting screw hole is machined along its axial direction at the center of the upper end of the lifting rod sleeve 46. The lower end of the adjusting screw 45 is threaded into the adjusting screw hole. The upper end of the adjusting screw 45 is rotatably mounted on the top of the fixed box 410 and is connected to the first motor 47. When adjusting the adjusting plate 42, the first motor 47 is turned on, and the first motor 47 drives the adjusting screw 45 to rotate forward or backward. When the adjusting screw 45 rotates, it can drive the lifting rod sleeve 46 to move up and down. During the up and down movement of the lifting rod sleeve 46, since a sliding plate 48 is provided on the outside of the lifting rod sleeve 46, the sliding plate 48 moves along the sliding groove 411. On the one hand, it limits the lifting rod sleeve 46, and on the other hand, it can ensure that the lifting rod sleeve 46 drives the adjusting plate 42 to move stably. After the adjusting screw 45 rotates forward or backward, it can drive the lifting rod sleeve 46 to move upward or downward, which makes the adjusting plate 42 and the fixed plate 41 misaligned, and the adjusting hole 44 and the air inlet 43 misaligned, thereby adjusting the diameter of the adjusting hole 44, which facilitates the adjustment of the air intake in the air intake pipe 3.

[0017] Preferably, to facilitate the replacement and disassembly of the adjusting plate 42, the limiting assembly includes a limiting rod 412 and a limiting block 413. One end of the mounting block 49 is machined with a slot. The adjusting plate 42 is equipped with a limiting hole corresponding to the slot. A limiting box 414 is installed on the adjusting plate 42 outside the limiting hole. The limiting rod 412 passes through the limiting box 414, and one end of the limiting rod 412 extends into the limiting groove after passing through the limiting hole. The limiting block 413 is installed on the end of the limiting rod 412 outside the limiting box 414. A movable plate 415 is installed on the limiting rod 412 inside the limiting box 414. The limiting rod 412 is positioned between the movable plate 415 and the limiting box 414. A spring 416 is installed on the 2nd plate. When the adjusting plate 42 needs to be replaced, open the box door, pull the limiting block 413, and pull the limiting block outward so that the movable plate 415 slides in the adjusting box 414. The movable plate 415 squeezes the spring 416 and compresses it, allowing the end of the limiting rod 412 to slide out of the slot, thus releasing the limitation on the mounting block 49. The adjusting plate 42 can then be removed and replaced with a new adjusting plate 42. After that, release the pull of the limiting block 413, and the end of the limiting rod 412 inserts into the slot. The spring 416 extends, and the movable plate 415 moves and abuts against the adjusting plate 42, thus reconnecting and fixing the adjusting plate 42 and the mounting block 49.

[0018] Furthermore, the unloading mechanism includes an unloading shaft 52, a second motor 53, and an unloading rod 54. The second motor 53 is a structure used in the prior art, and a finished product can be directly purchased according to the power required. The unloading shaft 52 includes a first shaft section, a crankshaft section, and a second shaft section. The first shaft section is rotatably mounted on one side of the feed tube 5, and the second shaft section is rotatably mounted on the other side of the feed tube 5. The first shaft section and the second shaft section are coaxially arranged. A connecting plate is installed between the first shaft section and the second shaft section, and a crankshaft section is installed on the connecting plate. The crankshaft section is not concentric with the first shaft section and the second shaft section. A bushing 55 is installed on the crankshaft section. A guide groove 56 is machined in the middle of the unloading rod 54. The guide groove 56 slides on a guide shaft 57. The guide shaft 57 is installed in the feed tube 5 above the first and second rotating shafts. The lower end of the unloading rod 54 is fixedly connected to the bushing 55. An unloading plate 58 is installed on the upper end of the unloading rod 54. The second motor 53 is installed on the lower shaft. The outer side of the feed pipe 5 is rotatably connected to the end of the first shaft section. In use, the second motor 53 is turned on, driving the first rotating shaft to rotate. Since the first and second rotating shafts are not concentric with the crankshaft section, when the first and second rotating shafts rotate synchronously, they will drive the crankshaft section to rotate as well. The crankshaft section rotates eccentrically. When the crankshaft section rotates, it will drive the lower part of the unloading rod 54 to move along with the crankshaft section through the bushing 55. The movement trajectory of the bushing 55 below the unloading rod 54 is the same as the movement trajectory of the crankshaft section axis. When the lower part of the unloading rod 54 moves, the guide groove 56 on the unloading rod 54 slides on the guide shaft 57, and the entire unloading rod 54 moves in a swinging and up-and-down swaying manner. The swinging and swaying unloading rod 54 can move the accumulated particles, loosening them, thereby allowing the accumulated material to flow downwards in the feed pipe 5, preventing blockage in the feed pipe. Preferably, to improve the unloading effect, the cross-sectional shape of the unloading plate 58 is a triangular structure.

[0019] Furthermore, to ensure that the phosphorus pentoxide particles discharged during sedimentation and separation remain within the hopper 13 and do not float upwards, an isolation cone 18 is installed inside the tower body 12 below the sedimentation separation cylinder 15. The isolation cone 18 has a conical structure, and its outer wall is fixedly connected to the inner wall of the tower body 12 by multiple connecting rods. The isolation cone 18 has a blocking effect on the settled phosphorus pentoxide particles, preventing them from being affected by the phosphorus pentoxide airflow within the hopper 13 and thus avoiding the phenomenon of phosphorus pentoxide particles floating upwards.

[0020] Furthermore, to improve the settling effect of particles in phosphorus pentoxide flue gas, the turbulence assembly includes multiple sets of turbulence cones 19 and turbulence cone shrouds 110 arranged vertically at intervals. The turbulence cones 19 are located above the turbulence cone shrouds 110, and each turbulence cone 19 has a conical structure with a larger upper end and a smaller lower end. The larger end of the turbulence cone 19 is fixedly connected to the inner wall of the settling separation cylinder 15, while the smaller end of the turbulence cone 19 is suspended in the air. The turbulence cone shroud 110 has a conical structure, and the outer surface of the turbulence cone shroud 110... The wall is connected to the inner wall of the settling separation cylinder 15 by multiple connecting rods. There is a gap between the large end of the turbulence cone 110 and the settling separation cylinder 15. The phosphorus pentoxide flue gas flows in a curved shape between the turbulence cone 19 and the turbulence cone 110. This can prolong the flow time of the phosphorus pentoxide flue gas in the settling separation cylinder 15, reduce the flow velocity of the phosphorus pentoxide flue gas, and allow the particles in the phosphorus pentoxide flue gas to be completely settled and separated, further improving the settling separation effect of phosphorus pentoxide flue gas.

Claims

1. An array type settling device for phosphorus pentoxide production, comprising a plurality of settling towers (1) connected in series and a conveyor (2) installed at the bottom of the settling towers (1), characterized in that: Each settling tower (1) includes a top plate (11), a tower body (12), and a hopper (13) arranged sequentially from top to bottom. An air outlet pipe (14) is provided on the top plate (11). An air inlet pipe (3) is provided on the upper part of the tower body (12). A regulating box (4) is provided between the air outlet pipe (14) and the air inlet pipe (3). An air inlet regulating mechanism is provided inside the regulating box (4). A settling separation cylinder (15) is coaxially installed inside the tower body (12). The diameter of the settling separation cylinder (15) gradually decreases from top to bottom. A contraction cone (16) is installed on the top of the 15) and sealed to the top plate (11). The air outlet pipe (14) is located on the inner side of the top of the contraction cone (16). A spiral separation plate (17) is installed on the outer side of the settling separation cylinder (15). A turbulence component is provided inside the settling separation cylinder (15). A discharge pipe (5) is detachably installed between the discharge hopper (13) and the conveyor (2). A star-shaped discharge valve (51) is installed on the discharge pipe (5). A material discharge mechanism is installed in the discharge pipe (5) on the upper side of the star-shaped discharge valve (51).

2. The array-type sedimentation device for phosphorus pentoxide production according to claim 1, characterized in that: The intake adjustment mechanism includes a fixed plate (41) and an adjustment plate (42). The fixed plate (41) is installed inside the adjustment box (4). The adjustment box has doors at both ends. The fixed plate (41) has multiple air inlets (43). The adjustment plate (42) is movably disposed on the side of the fixed plate (41) near the outlet end of the intake pipe (3). The adjustment plate (42) has multiple adjustment holes (44) corresponding to the air inlets (43). The top of the adjustment box (4) is equipped with a lifting adjuster connected to the top of the adjustment plate (42).

3. An array-type sedimentation device for phosphorus pentoxide production according to claim 2, characterized in that: The lifting regulator includes an adjusting screw (45), a lifting rod sleeve (46), a first motor (47), and a sliding plate (48). The top of the adjusting plate (42) is machined with a mounting groove. The lower end of the lifting rod sleeve (46) is equipped with a mounting block (49). The mounting block (49) is installed in the mounting groove by a limiting component. The top of the adjusting box (4) is equipped with a fixing box (410). The upper end of the lifting rod sleeve (46) is slidably installed on the top of the adjusting box (4) and extends to the fixing box. Inside (410), symmetrical grooves (411) are provided on the side wall of the fixed box (410). The sliding plate (48) is installed on the upper end of the lifting rod sleeve (46) and slides in cooperation with the groove (411). An adjusting screw hole is machined at the center of the upper end of the lifting rod sleeve (46) along its axial direction. The lower end of the adjusting screw (45) is threaded into the adjusting screw hole. The upper end of the adjusting screw (45) is rotatably installed on the top of the fixed box (410) and is connected to the first motor (47) for transmission.

4. An array-type sedimentation device for phosphorus pentoxide production according to claim 3, characterized in that: The limiting assembly includes a limiting rod (412) and a limiting block (413). One end of the mounting block (49) is machined with a slot. The adjusting plate (42) is equipped with a limiting hole corresponding to the slot. A limiting box (414) is installed on the adjusting plate (42) outside the limiting hole. The limiting rod (412) passes through the limiting box (414), and one end of the limiting rod (412) extends to the limiting groove after passing through the limiting hole. The limiting block (413) is installed on the end of the limiting rod (412) outside the limiting box (414). A movable plate (415) is installed on the limiting rod (412) inside the limiting box (414). A spring (416) is installed on the limiting rod (412) between the movable plate (415) and the limiting box (414).

5. An array-type sedimentation device for phosphorus pentoxide production according to claim 1, characterized in that: The feeding mechanism includes a feeding shaft (52), a second motor (53), and a feeding rod (54). The feeding shaft (52) includes a first shaft section, a crankshaft section, and a second shaft section. The first shaft section is rotatably mounted on one side of the feeding pipe (5), and the second shaft section is rotatably mounted on the other side of the feeding pipe (5). The first shaft section and the second shaft section are coaxially arranged. A connecting plate is installed between the first shaft section and the second shaft section. A crankshaft section is installed on the connecting plate. The crankshaft section is not concentric with the first shaft section and the second shaft section. A bushing (55) is installed on the upper part of the material feeding rod (54), and a guide groove (56) is machined in the middle part of the material feeding rod (54). The guide groove (56) is slidably mounted on the guide shaft (57). The guide shaft (57) is installed in the feed tube (5) above the first rotating shaft and the second rotating shaft. The lower end of the material feeding rod (54) is fixedly connected to the bushing (55). A material feeding plate (58) is installed on the upper end of the material feeding rod (54). The second motor (53) is installed on the outside of the feed tube (5) and is rotatably connected to the end of the first shaft section.

6. An array-type sedimentation device for phosphorus pentoxide production according to claim 5, characterized in that: The cross-sectional shape of the sprue plate (58) is a triangular structure.

7. An array-type sedimentation device for phosphorus pentoxide production according to claim 1, characterized in that: An isolation cone (18) is installed inside the tower body (12) below the settling separation cylinder (15). The isolation cone (18) has a conical structure, and the outer wall of the isolation cone (18) is fixedly connected to the inner wall of the tower body (12) by multiple connecting rods.

8. An array-type sedimentation device for phosphorus pentoxide production according to claim 1, characterized in that: The turbulence-inducing assembly includes multiple sets of turbulence cones (19) and turbulence cones (110) arranged at intervals. The turbulence cones (19) are located above the turbulence cones (110). The turbulence cones (19) are cone-shaped structures with a larger upper end and a smaller lower end. The larger end of the turbulence cones (19) is fixedly connected to the inner wall of the settling separation cylinder (15), and the smaller end of the turbulence cones (19) is suspended in the air. The turbulence cones (110) are cone-shaped structures. The outer wall of the turbulence cones (110) is connected to the inner wall of the settling separation cylinder (15) through multiple connecting rods. A gap is left between the larger end of the turbulence cones (110) and the settling separation cylinder (15).

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