A solid-liquid separation device for an alkali residue polymer system

Abstract

The present invention discloses a solid-liquid separation device for an alkali residue polymer system, belonging to the field of alkali residue polymer processing. A solid-liquid separation device for an alkali residue polymer system includes a treatment tank. A collection cylinder is arranged on one side of the treatment tank. A condenser tube is arranged above the collection cylinder on one side of the treatment tank. A spiral tube for condensing steam is arranged inside the condenser tube. The device further includes: an acceleration component arranged on the condenser tube; Through the mutual cooperation of the acceleration component, the vibration component and the swing component, when condensing the steam entering the inside of the condenser tube, the steam entering the condenser tube is accelerated and discharged, reducing the waiting time. At the same time, the liquid droplets adhering to the spiral tube due to condensation can be vibrated and dropped. And during operation, the contact time between the steam and the spiral tube can be increased through the swing component, improving the cooling effect of the spiral tube and the overall working efficiency of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of alkali residue polymer processing, and particularly to a solid-liquid separation device for an alkali residue polymer system. Background Art

[0002] Alkali residue refers to the alkaline waste residue discharged during the production of alkali and alkali treatment in industrial production. Its chemical components are mainly CaCO3, CaCl2, NaCl, Ca(OH)2, CaSO4, etc. Generally, the pH value is 10 - 12, and the mass fraction of particles with a particle size ≤ 25μm can reach more than 95%. It is in the form of porous aggregate particles with well-developed pores. Alkali residue polymer is a material prepared mainly from alkali residue. Solid-liquid separation plays an important role in the alkali residue polymer system. Solid-liquid separation can effectively remove impurities in the waste residue, improve the purity of the alkali residue, optimize the performance of the alkali residue polymer system, and help improve its application effect.

[0003] In the prior art, the common method for solid-liquid separation of alkali residue polymer is to use distillation to purify the solid-liquid separation of alkali residue polymer. However, in the actual operation process, when the steam generated during heating is cooled by the condenser tube, to improve the cooling effect of the steam, generally, the condenser tube is spiral. But when cooling, the liquid condensed on its surface adheres to the outside of the tube wall, resulting in a slow liquid distillation and collection speed of the device and reducing the working efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that in the prior art, the liquid condensed on the surface adheres to the outside of the tube wall during cooling, resulting in a slow liquid distillation and collection speed of the device and reducing the working efficiency, and to propose a solid-liquid separation device for an alkali residue polymer system.

[0005] To achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A solid-liquid separation device for an alkali residue polymer system, including a treatment tank. A collection cylinder is arranged on one side of the treatment tank. A condenser tube is arranged above the collection cylinder on one side of the treatment tank. A spiral tube for condensing steam is arranged inside the condenser tube. The device further includes: an acceleration component arranged on the condenser tube for accelerating the steam entering the inlet at the condenser tube; a vibration component installed inside the condenser tube, one end of which is connected to the acceleration component, for vibrating and dripping the liquid condensed on the surface of the spiral tube; a swing component symmetrically installed on both sides of the spiral tube inside the condenser tube for increasing the contact time between the passing steam and the spiral tube.

[0007] Preferably, the acceleration component includes a liquid inlet pipe fixed at one end of the condenser, one end of the liquid inlet pipe extends into the interior of the condenser and is fixed with a connecting box, the inner wall of the connecting box is rotatably connected to a rotating shaft through a bearing, an impeller is installed on the surface of the rotating shaft, a driving wheel is fixed on the surface of the rotating shaft outside the connecting box, and a discharge component is provided on the driving wheel.

[0008] Preferably, the discharge assembly includes a driven wheel connected to the driving wheel through a belt, a connecting shaft is fixed at the axis of the driven wheel, a fan blade is fixed at the end of the connecting shaft, and a fixed plate is rotatably connected to the surface of the connecting shaft through a bearing, and one end of the fixed plate is fixedly connected to the inner wall of the condenser.

[0009] Preferably, a bevel gear is fixed to the other end of the connecting shaft, a mating gear is meshed on the surface of the bevel gear, a rotating rod is fixed at the axis of the mating gear, the end of the rotating rod is rotatably connected to the inner wall of the condenser tube through a bearing, a cam is fixed to the surface of the rotating rod, an extrusion plate is fitted on the surface of the cam, and the extrusion plate is installed on one end of the spiral tube.

[0010] Preferably, the swing assembly includes a support rod fixed to the bottom of the extrusion plate, and arc-shaped plates are fixed to the ends of the two support rods. One end of the arc-shaped plate is rotatably connected to a fixed block through a pin shaft, and the fixed block is installed on the inner wall of the condenser. An extrusion spring is fixed to one side of the arc-shaped plate, and the end of the extrusion spring is fixedly connected to the inner wall of the condenser.

[0011] Preferably, the spiral tube also includes a hose fixed on the extrusion plate, the hose is connected to the spiral tube, a delivery pipe is fixed to one end of the hose, one end of the delivery pipe is connected to the connecting box, a fixing rod is provided on the surface of the delivery pipe, one end of the fixing rod is fixedly connected to the inner wall of the condenser tube.

[0012] Preferably, a distillation tube is fixed on the top of the condenser, one end of the distillation tube is fixedly connected to the top of the processing tank, and a circulation tube is fixed to the other end of the spiral tube. The end of the circulation tube passes through the condenser and extends to the outside where a cooling box is fixed. A driving part is installed on one side of the cooling box, and the end of the driving part is connected to the liquid inlet pipe.

[0013] Preferably, a limiting rod is fixed to the outer wall of the connecting box, the end of the limiting rod is fixedly connected to the inner wall of the condenser, a connecting tube is fixed to the bottom of the condenser, the connecting tube is fixedly connected to the collecting tube, and the surface of the connecting tube is fixedly connected to the outer wall of the processing tank through a fixing rod.

[0014] Preferably, a pressure reducing valve is installed on the top of the processing tank, a feed inlet is provided on the top of the processing tank, and a discharge pipe is installed on the bottom of the processing tank.

[0015] Preferably, both the treatment tank and the collection cylinder are installed on the base, and a heating pipe for heating the alkali residue polymer is provided in the treatment tank.

[0016] Compared with the prior art, the present invention provides a solid-liquid separation device for an alkali residue polymer system, having the following beneficial effects:

[0017] 1. In the solid-liquid separation device for an alkali residue polymer system, through the acceleration component provided in the condenser tube, when cooling the incoming steam at the condenser tube, the power generated by the coolant transported into the spiral tube is utilized to drive the acceleration component to operate synchronously, so that the fan blades on the acceleration component rotate in the condenser tube, accelerating and blowing the steam entering the condenser tube, generating a vortex shape to better contact and cool with the spiral tube in the condenser tube, and improving the cooling efficiency of the device.

[0018] 2. In the solid-liquid separation device for an alkali residue polymer system, when the acceleration component operates, it can drive the vibration component to operate synchronously, so that the cam at the vibration component presses the extrusion plate, thereby driving the spiral tube inside the condenser tube to move up and down reciprocally, generating vibration, and then vibrating and dripping the liquid condensed on the spiral tube, accelerating liquid collection, and further improving the condensation effect of the spiral tube.

[0019] 3. In the solid-liquid separation device for an alkali residue polymer system, when the vibration component operates, it can drive the swing component to operate synchronously, so that the two arc-shaped plates on the swing component swing reciprocally inside the condenser tube, thereby increasing the contact time between the steam passing through the spiral tube and the spiral tube, and further improving the condensation effect of the spiral tube.

[0020] For the parts not involved in this device, they are the same as the prior art or can be implemented by using the prior art. Through the mutual cooperation of the acceleration component, the vibration component and the swing component, when condensing the steam entering the inside of the condenser tube, the steam entering the condenser tube is accelerated and discharged, reducing the waiting time. At the same time, the dripping liquid attached to the spiral tube due to condensation can be vibrated and dripped, and during operation, the contact time between the steam and the spiral tube can also be increased through the swing component, improving the cooling effect of the spiral tube and the overall working efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a solid-liquid separation device for an alkali residue polymer system proposed by the present invention;

[0022] Figure 2 It is a front view structure schematic diagram of a solid-liquid separation device for an alkali residue polymer system proposed by the present invention;

[0023] Figure 3Top view structural schematic diagram of a solid-liquid separation device for an alkali residue polymer system proposed by the present invention;

[0024] Figure 4 Side cross-sectional three-dimensional structural schematic diagram of a solid-liquid separation device for an alkali residue polymer system proposed by the present invention;

[0025] Figure 5 Left view cross-sectional structural schematic diagram of a solid-liquid separation device for an alkali residue polymer system proposed by the present invention;

[0026] Figure 6 A solid-liquid separation device for an alkali residue polymer system proposed by the present invention Figure 5 Enlarged structural schematic diagram of area A in;

[0027] Figure 7 Cross-sectional three-dimensional structural schematic diagram of a condenser tube in a solid-liquid separation device for an alkali residue polymer system proposed by the present invention;

[0028] Figure 8 A solid-liquid separation device for an alkali residue polymer system proposed by the present invention Figure 7 Enlarged structural schematic diagram of area B in.

[0029] In the figure: 1. Treatment tank; 2. Collection cylinder; 3. Condenser tube; 4. Spiral tube; 41. Flexible hose; 42. Delivery pipe; 5. Acceleration assembly; 51. Liquid inlet pipe; 52. Connection box; 53. Rotating shaft; 54. Impeller; 55. Driving wheel; 56. Driven wheel; 57. Connection shaft; 58. Fan blade; 59. Fixed plate; 6. Vibration assembly; 61. Bevel gear; 62. Fitting gear; 63. Rotating rod; 64. Cam; 65. Extrusion plate; 7. Swing assembly; 71. Support rod; 72. Fixed block; 73. Arc plate; 74. Extrusion spring; 8. Distillation pipe; 9. Limit rod; 10. Circulation pipe; 11. Cooling box; 12. Driving part; 13. Connection pipe; 14. Pressure reducing valve; 15. Feed inlet; 16. Base; 17. Discharge pipe; 18. Heating pipe. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0032] Referring to Figure 1-8 , a solid-liquid separation device for an alkali residue polymer system, comprising a treatment tank 1. A collection cylinder 2 is arranged on one side of the treatment tank 1. A condenser tube 3 is arranged above the collection cylinder 2 on one side of the treatment tank 1. A spiral tube 4 for condensing steam is arranged inside the condenser tube 3. It further includes: an acceleration assembly 5 arranged on the condenser tube 3 for accelerating and discharging the steam entering at the inlet of the condenser tube 3; a vibration assembly 6 installed inside the condenser tube 3, one end of which is connected to the acceleration assembly 5 for vibrating and dripping the liquid condensed on the surface of the spiral tube 4; a swing assembly 7 arranged inside the condenser tube 3 and symmetrically installed on both sides of the spiral tube 4 for increasing the contact time between the passing steam and the spiral tube 4.

[0033] In the present invention, during use, the alkali residue polymer is pre-put into the treatment tank 1 and dissolved by adding a solvent. Then, the treatment tank 1 is depressurized and sealed. After preparation, the inside of the treatment tank 1 is heated to separate the solid and liquid of the alkali residue polymer. The liquid generates steam and rises after heating. Then, the steam passing through is condensed by the spiral tube 4 at the condenser tube 3. Finally, the condensed liquid is transported into the collection cylinder 2 for collection and treatment. During use, the power source generated by the coolant transported into the spiral tube 4 drives the acceleration assembly 5 to operate, so that the fan blades 58 on the acceleration assembly 5 rotate, accelerating and discharging the steam transported into the condenser tube 3 into the condenser tube 3, contacting the spiral tube 4 inside the condenser tube 3, reducing the waiting time, and improving the working efficiency of the device. During the operation of the acceleration assembly 5, the vibration assembly 6 is driven to operate synchronously by the acceleration assembly 5. The vibration assembly 6 drives the spiral tube 4 to move up and down to generate a vibration effect. In this way, the water droplets condensed on the surface of the spiral tube 4 due to condensation at the spiral tube 4 can be shaken off to accelerate the recovery of the water droplets. At the same time, the condensation effect of the spiral tube 4 can also be improved, avoiding a large amount of water droplets adhering to the spiral tube 4 and reducing the absorption of heat. When the vibration assembly 6 operates, the swing assembly 7 can be driven to operate synchronously, so that the two arc-shaped plates 73 on the swing assembly 7 make reciprocating swing operations. In this way, the steam speed flowing through the condenser tube 3 can be controlled, increasing the contact time between the steam and the spiral tube 4, further improving the cooling effect of the spiral tube 4, improving the overall working efficiency of the device, and shortening the waiting time.

[0034] In a preferred embodiment, referring to Figure 6 and Figure 7The acceleration component 5 includes a liquid inlet pipe 51 fixed to one end of the condenser 3, one end of the liquid inlet pipe 51 extends into the interior of the condenser 3 and is fixed with a connecting box 52, the inner wall of the connecting box 52 is rotatably connected to a rotating shaft 53 through a bearing, an impeller 54 is installed on the surface of the rotating shaft 53, the surface of the rotating shaft 53 is located outside the connecting box 52 and a driving wheel 55 is fixed, the driving wheel 55 is provided with a discharge component, the discharge component includes a driven wheel 56 connected to the driving wheel 55 through a belt, a connecting shaft 57 is fixed at the axis of the driven wheel 56, a fan blade 58 is fixed at the end of the connecting shaft 57, the surface of the connecting shaft 57 is rotatably connected to a fixed plate 59 through a bearing, and one end of the fixed plate 59 is fixedly connected to the inner wall of the condenser 3.

[0035] Specifically, the setting of the liquid inlet pipe 51 can transport the coolant delivered to the spiral tube 4 to the inside of the connecting box 52, and use the power generated by the liquid delivery to drive the impeller 54 to rotate. The impeller 54 can drive the driving wheel 55 to rotate, and the transmission position is changed through the driven wheel 56, and finally the fan blade 58 can be driven to rotate. The fan blade 58 is installed at the connection between the condenser 3 and the distillation tube 8. In this way, when the fan blade 58 rotates, the steam delivered to the distillation tube 8 is accelerated to be discharged into the condenser 3, thereby reducing the waiting time for the slow operation of the steam, improving the effect of the device on steam condensation, and improving the working efficiency of the device.

[0036] In a preferred embodiment, referring to Figure 4 , Figure 7 and Figure 8 A bevel gear 61 is fixed to the other end of the connecting shaft 57, and a matching gear 62 is meshed on the surface of the bevel gear 61. A rotating rod 63 is fixed at the axis of the matching gear 62. The end of the rotating rod 63 is rotatably connected to the inner wall of the condenser 3 through a bearing. A cam 64 is fixed to the surface of the rotating rod 63, and an extrusion plate 65 is attached to the surface of the cam 64. The extrusion plate 65 is installed on one end of the spiral tube 4.

[0037] Specifically, when the connecting shaft 57 rotates, the bevel gear 61 can be driven to rotate synchronously, and the bevel gear 61 meshes with the mating gear 62 for transmission, driving the rotating rod 63 to rotate, and finally driving the cam 64 on the rotating rod 63 to rotate. When the cam 64 rotates, it is always in a fit state with the extrusion plate 65, squeezing the extrusion plate 65 to move, and then it is convenient to drive the spiral tube 4 to reciprocate up and down. In this process, the spiral tube 4 is vibrated, and the water droplets generated by the condensation of steam on the spiral tube 4 can be vibrated and dripped, thereby improving the collection speed of the liquid and further accelerating the working efficiency of the device. This design can also avoid the reduction of the absorption of steam heat due to the attached water droplets on the spiral tube 4, and improve the condensation effect of the spiral tube 4.

[0038] In a preferred embodiment, referring to Figure 4 and Figure 7, the swinging assembly 7 includes a support rod 71 fixed to the bottom of the extrusion plate 65. Arc-shaped plates 73 are fixed to the ends of the two support rods 71. One end of the arc-shaped plate 73 is rotatably connected to a fixed block 72 through a pin shaft. The fixed block 72 is installed on the inner wall of the condensing pipe 3. A compression spring 74 is fixed to one side surface of the arc-shaped plate 73, and the end of the compression spring 74 is fixedly connected to the inner wall of the condensing pipe 3.

[0039] Specifically, when the extrusion plate 65 moves up and down, it can drive the support rod 71 to move synchronously. Since the support rod 71 is connected to the arc-shaped plate 73, it can drive the arc-shaped plate 73 to swing. During the swinging process of the arc-shaped plate 73, it does not come into contact with the spiral pipe 4. The support rod 71 is made of rubber material and can deform and bend. During the displacement of the support rod 71, it does not affect the swinging operation of the arc-shaped plate 73. The setting of the compression spring 74 can elastically squeeze the arc-shaped plate 73, facilitating resetting and improving the overall stability of the structure's operation. When the two arc-shaped plates 73 swing reciprocally, it can change the flow rate at the outlet position of the condensing pipe 3, thereby increasing the contact time between the steam flowing through the condensing pipe 3 and the spiral pipe 4, and further improving the condensation efficiency of the device.

[0040] In a preferred embodiment, referring to Figure 2 , Figure 7 and Figure 8 , the spiral pipe 4 further includes a flexible hose 41 fixed to the extrusion plate 65. The flexible hose 41 is connected to the spiral pipe 4. One end of the flexible hose 41 is fixed with a delivery pipe 42. One end of the delivery pipe 42 is connected to the connection box 52. A fixed rod is provided on the surface of the delivery pipe 42, and one end of the fixed rod is fixedly connected to the inner wall of the condensing pipe 3. A limiting rod 9 is fixed to the outer wall of the connection box 52, and the end of the limiting rod 9 is fixedly connected to the inner wall of the condensing pipe 3. A connecting pipe 13 is fixed to the bottom of the condensing pipe 3. The connecting pipe 13 is connected to the collection cylinder 2. The surface of the connecting pipe 13 is fixedly connected to the outer wall of the treatment tank 1 through a fixed rod.

[0041] Specifically, the spiral pipe 4 is arranged in a spiral shape and is made of copper pipe. During the condensation operation, by starting the driving part 12, the coolant pre-configured inside the cooling tank 11 is extracted and then delivered to the connection box 52 through the liquid inlet pipe 51, and then delivered to the inside of the spiral pipe 4 through the delivery pipe 42 and the flexible hose 41, which is convenient for absorbing the heat in the steam. The absorbed coolant flows back to the inside of the cooling tank 11 through the circulation pipe 10 and is used in such a cycle. The connection between the spiral pipe 4 and the circulation pipe 10 is connected by a telescopic rubber pipe, which does not affect the displacement operation of the spiral pipe 4.

[0042] In a preferred embodiment, referring to Figure 1-8, a pressure reducing valve 14 is installed at the top of the treatment tank 1, a feed inlet 15 is provided at the top of the treatment tank 1, a discharge pipe 17 is installed at the bottom of the treatment tank 1, both the treatment tank 1 and the collection cylinder 2 are installed on the base 16, and a heating pipe 18 for heating the alkali residue polymer is provided inside the treatment tank 1.

[0043] Specifically, when separating the solid and liquid of the alkali residue polymer, one end of the pressure reducing valve 14 is connected to a pressure reducing device, which can reduce the pressure inside the treatment tank 1 and lower the pressure inside the treatment tank 1. Due to the decrease in pressure, the boiling point of the liquid will also decrease accordingly, which enables those substances that cannot be distilled under normal pressure to be distilled under reduced pressure. The setting of the heating pipe 18 can be plugged into an external power source to heat the inside of the treatment tank 1. During the distillation process, the feed inlet 15 can be covered and sealed. After the distillation is completed, the solid inside the treatment tank 1 can be discharged by opening the valve on the discharge pipe 17, which is convenient for discharging.

[0044] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A solid-liquid separation device for an alkali residue polymer system, comprising a treatment tank, a collection cylinder is arranged on one side of the treatment tank, a condenser is arranged above the collection cylinder on one side of the treatment tank, and a spiral tube for condensing steam is arranged inside the condenser, characterized in that, Also includes: The accelerating component arranged on the condenser is used to accelerate the discharge of the steam at the inlet of the condenser; A vibration component installed in the condenser tube, one end of which is connected to the acceleration component, is used to vibrate the liquid condensed on the surface of the spiral tube to drop; The swing assembly is arranged inside the condenser tube and symmetrically installed on both sides of the spiral tube to increase the contact time between the steam and the spiral tube; The acceleration component includes a liquid inlet pipe fixed to one end of the condenser tube, one end of the liquid inlet pipe extends into the interior of the condenser tube and is fixed with a connection box, the inner wall of the connection box is rotatably connected to a rotating shaft through a bearing, an impeller is installed on the surface of the rotating shaft, a driving wheel is fixed on the surface of the rotating shaft outside the connection box, and a discharge component is arranged on the driving wheel; The discharge assembly includes a driven wheel connected to the driving wheel through a belt, a connecting shaft is fixed at the axis of the driven wheel, a fan blade is fixed at the end of the connecting shaft, a fixed plate is rotatably connected to the surface of the connecting shaft through a bearing, and one end of the fixed plate is fixedly connected to the inner wall of the condenser tube; A bevel gear is fixed to the other end of the connecting shaft, a mating gear is meshed on the surface of the bevel gear, a rotating rod is fixed at the axis of the mating gear, the end of the rotating rod is rotatably connected to the inner wall of the condenser tube through a bearing, a cam is fixed to the surface of the rotating rod, an extrusion plate is fitted on the surface of the cam, and the extrusion plate is installed on one end of the spiral tube.

2. The solid-liquid separation device for an alkali residue polymer system according to claim 1, characterized in that, The swing assembly includes a support rod fixed to the bottom of the extrusion plate, and arc-shaped plates are fixed to the ends of the two support rods. One end of the arc-shaped plate is rotatably connected to a fixed block through a pin shaft, and the fixed block is installed on the inner wall of the condenser. An extrusion spring is fixed to one side of the arc-shaped plate, and the end of the extrusion spring is fixedly connected to the inner wall of the condenser.

3. A solid-liquid separation device for an alkali residue polymer system according to claim 2, characterized in that, The spiral tube also includes a hose fixed on the extrusion plate, the hose is connected to the spiral tube, a delivery pipe is fixed to one end of the hose, one end of the delivery pipe is connected to the connection box, a fixing rod is provided on the surface of the delivery pipe, one end of the fixing rod is fixedly connected to the inner wall of the condenser tube.

4. A solid-liquid separation device for an alkali residue polymer system according to claim 1, characterized in that, A distillation tube is fixed on the top of the condenser, one end of which is fixedly connected to the top of the treatment tank, a circulation tube is fixed to the other end of the spiral tube, the end of the circulation tube passes through the condenser and extends to the outside where a cooling box is fixed, a driving part is installed on one side of the cooling box, and the end of the driving part is connected to the liquid inlet pipe.

5. The solid-liquid separation device for an alkali residue polymer system according to claim 1, characterized in that A limiting rod is fixed to the outer wall of the connecting box, the end of the limiting rod is fixedly connected to the inner wall of the condenser, a connecting pipe is fixed to the bottom of the condenser, the connecting pipe is fixedly connected to the collecting tube, and the surface of the connecting pipe is fixedly connected to the outer wall of the processing tank through a fixing rod.

6. A solid-liquid separation device for an alkali residue polymer system according to claim 1, characterized in that, A pressure reducing valve is installed on the top of the processing tank, a feed inlet is arranged on the top of the processing tank, and a discharge pipe is installed on the bottom of the processing tank.

7. A solid-liquid separation device for an alkali residue polymer system according to claim 1, characterized in that, The processing tank and the collecting cylinder are both installed on a base, and a heating pipe for heating the alkali slag polymer is arranged in the processing tank.

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