JP2017094232A - Device for separating solid from fluid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fairly separate a solid from a fluid without generating clogging or the like in a mixed fluid which includes the solid being a solid form component and the fluid being a wet component and rises from a lower system.SOLUTION: In a device for separating a solid from a fluid, a rotary vane 56 for imparting a centrifugal force to a mixed fluid M, and a wall body 62 composing a storage chamber 61 storing the rotary vane 56 are provided on a route 12 putting through the mixed fluid M which includes a wet component and solid component and rises from a lower system inside to its outside. The wall body 62 receives the solid component in the mixed fluid M projected outward along the radial direction of the rotary vane 56 by action of the centrifugal force to drop the received solid component in the system inside. The wall body 62 does not block the discharge of a fluid F outside the system in the projected mixed fluid M.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a solid / fluid separator, and more particularly to a solid / fluid separator that can be suitably installed in an exhaust passage from a production apparatus for a resin composition such as polyamide.

  Patent Document 1 describes a method for producing a semi-aromatic polyamide containing a terephthalic acid component and a diamine component. In this production method, the melted diamine is added to the terephthalic acid powder and stirred substantially without containing water so as to maintain the state of the terephthalic acid powder under a predetermined temperature condition. A salt is produced by the reaction of terephthalic acid and diamine, and a low polymer is produced by polymerization of the salt to obtain a mixture of the salt and the low polymer. Since water vapor is generated during the reaction, it is necessary to discharge it out of the system above the reactor.

Japanese Patent No. 5546623

  However, in the reaction system described in Patent Document 1, mist of diamine is also generated in addition to water vapor, and the powder is soared in the system because of further stirring. Examples of the soaring powder include terephthalic acid as a raw material, generated salt, and generated low polymer.

  Of these, mist of water vapor and diamine needs to be discharged out of the system, and raw materials and products need to remain in the system. For this purpose, it is assumed that a filter device is used. However, since a mixed fluid containing solids and fluid from the inside of the system passes through the filter device, for example, a bag filter or the like is used for a short time. Clogging occurs.

  Therefore, the present invention appropriately separates the solid and fluid in the mixed fluid that rises from the lower system including the solid that is a solid component and the fluid that is a wet component without causing clogging or the like. The purpose is to be able to.

In order to achieve this object, the solid-fluid separation device of the present invention comprises:
In the path through which the mixed fluid that contains the wet component and the solid component rises from the inside of the lower system toward the outside of the system,
A rotating blade for applying centrifugal force to the mixed fluid;
A wall constituting a storage chamber for storing the rotating blades, which receives the solid component of the mixed fluid projected outward along the radial direction of the rotating blades by the action of the centrifugal force, The solid component received is dropped into the system, and a wall body that does not inhibit the discharge of the fluid out of the projected mixed fluid to the outside of the system is provided.

  According to the present invention, the rotating blade covers the plurality of blade bodies arranged radially outward from the rotation center portion and the central portion of the inflow portion of the mixed fluid in the rotating blade, and the mixed fluid is the rotating blade. It is preferable to have a baffle member that prevents the mixed fluid from flowing into the central portion of the rotating blade and guides the mixed fluid to the outer peripheral annular portion outside the central portion of the rotary blade.

According to the present invention, it is preferable to have means for heating the wall body.
The solid / fluid separation device of the present invention is preferably connected to a polyamide polymerization apparatus and used for a mixed fluid rising from the polymerization apparatus.

  According to the present invention, among the mixed fluid to which centrifugal force is applied by the rotating blades, the solid component can be received by the wall body and dropped by the action of gravity to be recovered in the system. In the present invention, the solid component includes not only solids such as particles but also those in which a fluid is attached and integrated around the solid.

Of the mixed fluid to which centrifugal force is applied by the rotating blades, fluids such as gas components and mist can be guided by the wall body and discharged out of the system.
Therefore, according to the present invention, the solid and the fluid in the mixed fluid rising from the lower system including the solid and the fluid can be reliably separated without causing clogging.

  According to the present invention, by providing the baffle member on the rotating blade, the mixed fluid can be sent to the outer peripheral side annular portion where a strong centrifugal force acts on the rotating blade, and therefore, the separation can be performed efficiently. In addition, the mixed fluid is prevented from flowing into the center of the rotating blade with weak centrifugal force, and the solid into the center of the rotating blade, the solid / adhesive fluid integrated, or the adhesive fluid Occurrence of clogging due to adhesion can be prevented.

  According to the present invention, by having the means for heating the wall body, when the solid body and the adhesive fluid are integrated with each other or when the adhesive fluid is received by the wall body, Viscosity can be lowered, and therefore, an integrated product or an adhesive fluid can flow down into the system, and clogging due to adhesion of these to the wall can be prevented.

  The solid-fluid separator of the present invention is connected to a polyamide polymerization apparatus and is used for a mixed fluid rising from the polymerization apparatus, so that water vapor generated in the polyamide polymerization apparatus is obtained. And diamine mist can be effectively discharged out of the system, and raw materials and products contained in the mixed fluid can be reliably recovered in the system.

It is sectional drawing of the separation apparatus of the solid of embodiment of this invention and a fluid. It is a three-dimensional view of the rotary blade in the separation device.

Hereinafter, an embodiment of a solid-fluid separation device according to the present invention will be described taking a polyamide production apparatus as an example.
In FIG. 1, reference numeral 1 denotes a polyamide production apparatus, and this production apparatus 1 is constituted in detail by a reaction apparatus 2 equipped with a rotary stirring apparatus. The reactor 2 is connected to the solid / fluid separator 11 according to the embodiment of the present invention.

  Specifically, an opening 4 having a flange 3 is formed in the upper part of the reaction apparatus 2, and a separation apparatus 11 is connected using the flange 3. The separation device 11 has a cylindrical body 12 and a T-shaped tube 13, and a flange 15 around an opening 14 at the lower end of the cylindrical body 12 arranged in the vertical direction is fastened to the flange 3 of the opening 4 of the reaction device 2. At the same time, a flange 17 around the opening 16 at the upper end of the cylindrical body 12 is fastened to a lower flange 18 of the T-shaped tube 13 disposed so as to have a lateral T-shape. When the lower flange 18 is fastened to the flange 17 of the cylindrical body 12, the lower end protruding portion 19 of the T-shaped tube 13 is configured to enter the inside of the cylindrical body 12 through the opening 16 at the upper end of the cylindrical body 12. Yes.

  An upper flange 23 is provided around the opening 22 of the upper end portion 21 of the T-shaped tube 13. A lid 24 for closing the opening 22 is fastened to the upper flange 23. A disc-shaped bearing holder 25 is attached to the lid 24. An implant bolt 26 is fastened to the lid 24, and the implant bolt 26 penetrates the bearing holder 25 and protrudes upward from the bearing holder 25. A sleeve 27 is fitted on a portion of the stud bolt 26 that protrudes above the bearing holder 25. Further, a portion of the stud bolt 26 that protrudes above the sleeve 27 passes through the flange 29 of the motor 28. When the nut 30 is screwed onto the stud 26, the lid 24, the bearing holder 25, the sleeve 27, and the flange 29 of the motor 28 are fastened together. Thus, the bearing holder 25 is fixed to the lid 24, and the motor 28 is fixed at a position spaced upward from the bearing holder 25 by the sleeve 27 functioning as a spacer. That is, a space 31 is formed between the bearing holder 25 and the flange 29 of the motor 28.

  A cylindrical shaft holder 35 in the vertical direction is arranged at the center of the inside of the T-shaped tube 13. The upper end of the shaft holder 35 is attached to the lid 24, so that the shaft holder 35 is supported by being suspended by the lid 24. A shaft 36 is arranged in the vertical direction inside the shaft holder 35.

  The lower end of the shaft holder 35 reaches the position of the lower end opening of the lower end protruding portion 19 of the T-shaped tube 13, and a bearing holder 37 is provided at the lower end of the shaft holder 35. Is retained. The shaft 36 is rotatably supported by a bearing 38 at a position on the lower end side in a state where downward movement is prevented. Reference numeral 39 denotes a bearing retainer. The bearing retainer 39 is provided with a packing 40 that slidably contacts the outer peripheral surface of the shaft 36. The packing 40 seals the inside of the shaft holder 37 including the bearing 38 and the outside thereof at a position on the lower end side of the shaft holder 37.

  A bearing 41 is held on the bearing holder 25 corresponding to the upper end side of the shaft holder 35. The shaft 36 is rotatably supported by the bearing 41 at a position on the upper end side in a state where upward movement is prevented. Reference numeral 42 denotes a bearing press.

  That is, the shaft 36 is rotatably supported in the shaft holder 35 with the bearings 38 and 41 being prevented from moving in the vertical direction. The inside of the shaft holder 35 is sealed from the inside of the T-shaped tube 13 by the packing 40.

  The upper end portion of the shaft 36 protruding upward from the bearing retainer 42 and the rotating shaft of the motor 28 are connected to each other by a aligning joint 43. That is, the shaft 36 is configured to be rotationally driven by the motor 28.

  An air purge tube 45 is provided inside the cylindrical shaft holder 35. The upper portion of the air purge tube 45 passes through the bearing holder 25 and the bearing retainer 42 and reaches the space 31, and the upper end thereof is communicated with the purge air supply elbow 46 in the space 31. The supply elbow 46 is supplied with purge air from a supply source (not shown). The lower end of the air purge tube 45 enters the inside of the bearing holder 37 and communicates with an air passage 47 formed inside the bearing holder 37. The air passage 47 communicates with the inside of the lower end side of the shaft holder 35 on the upper end surface of the bearing holder 37.

  A purge air discharge passage 48 that penetrates the bearing holder 25 and the bearing retainer 42 is formed. The discharge passage 48 includes an interior on the upper end side of the shaft holder 35 and a purge air discharge elbow 49 attached to the bearing retainer 42. Communicate.

  A lateral discharge path 50 is formed in the T-shaped tube 13. The discharge path 50 has an opening 51 at the tip and a flange 52 around the opening 51. The discharge path 50 is connected to a discharge pipe 53 by a flange 52.

  The lower end portion 55 of the shaft 36 protrudes downward from the lower end opening of the T-shaped tube 13 and the lower end of the shaft holder 35, and enters the inside of the cylindrical body 12 concentrically. A rotating blade 56 is attached to the lower end portion 55. As shown in FIGS. 1 and 2, the rotary blade 56 includes a sleeve 57 that is fitted to the lower end portion 55 of the shaft 36, and a plate that is provided so as to protrude radially outward from the sleeve 57 in the radial direction. Shaped blade body 58. A plurality of blades 58 are provided at equal intervals along the circumferential direction of the sleeve 57. A baffle member 59 is provided at the bottom of the rotary blade 56. The baffle member 59 is formed in a disc shape, and is formed so that the outer diameter thereof is smaller than the outer diameter of the rotary blade 56, and is formed concentrically with the rotary blade 56. As a result, when the rotary blade 56 is viewed from below, the central portion of the rotary blade 56 is covered by the baffle member 59, and the mixed flow from the manufacturing apparatus 1 is only in the outer peripheral side annular portion outside the central portion. A body inlet 60 is formed. As described above, the accommodating chamber 61 for the rotary blade 56 is formed inside the cylindrical body 12, and a slight gap is formed between the outer periphery of the rotary blade 56 and the wall body 62 of the cylindrical body 12 arranged concentrically with each other. 63 is formed.

A heating device 64 is provided on the outer periphery of the wall body 63 of the cylindrical body 12. The heating device 64 is constituted by a hot water jacket, a heater, or the like.
In such a configuration, when the reaction apparatus 2 is operated to produce polyamide, the separation apparatus 1 is operated by rotating the motor 28 while discharging the unnecessary fluid in the system using the discharge pipe 53. To do.

  At this time, the terephthalic acid powder and the liquid diamine are supplied and stirred in the reactor 2 and the terephthalic acid powder is heated to the melting point or higher of the diamine. Therefore, powdered terephthal and liquid diamine are stirred inside the reaction apparatus. At that time, diamine is added to the terephthalic acid powder without substantially containing water so as to keep the powdered state of terephthalic acid. Thereby, inside the reaction apparatus 2, the production | generation of the salt by reaction of a terephthalic acid and diamine and the production | generation reaction of the low polymer by superposition | polymerization of this salt are performed.

  Since this reaction is a condensation reaction, water vapor is generated, and diamine mist is also generated inside the reactor 2. In addition, since the agitation is performed, in the reactor 2, the terephthalic acid powder, the produced powdery salt, and the produced powdery low polymer rise.

  In the discharge pipe 53, it is necessary to discharge only the mist of water vapor and diamine as wet components out of the system, and return the powdery solid component, that is, the solid component, into the system. Therefore, this requirement is satisfied by the separation device 11. That is, when a suction operation is performed by the discharge pipe 53, for example, a mixed fluid M of water vapor or diamine mist and various powders enters the inside of the cylindrical body 12 from the opening 14. The mixed fluid M enters the rotary blade 56 from the inlet 60 of the rotary blade 56 and is projected toward the wall body 62 of the cylindrical body 12 by the centrifugal force applied by the rotary blade 56.

  At this time, the central portion of the bottom portion of the rotary blade 56 is covered with the baffle member 59, and the inflow port 60 is formed only at the outer peripheral side annular portion of the bottom portion of the rotary blade 56. Therefore, the mixed fluid M is fed only to the portion where the strong centrifugal force is acting on the rotary blade 56, and therefore the solid component and the fluid can be separated efficiently. Further, the mixed fluid M can be prevented from entering the central portion of the rotating blade 56 having a weak centrifugal force. For this reason, a solid, an integrated product of a solid and an adhesive fluid, or an adhesive property can be inserted into the central portion of the rotating blade 56. It is possible to prevent clogging due to fluid entering and adhering.

  Of the mixed fluid M projected toward the wall body 62, the solid powder is received by the wall body 62 and dropped into the reactor 2 as indicated by an arrow S by the action of gravity, and the system is Returned in. The wall body 62 also accepts an integrated product in which a liquid adheres around a solid powder or a liquid having adhesiveness, and these are also dropped into the reactor 2 as indicated by an arrow S.

  If the temperature of the wall 63 is raised by the heating device 64, the viscosity can be lowered when an adhesive liquid or the like is received by the wall 63, so that it reliably falls toward the reaction device 2. Can be made. For this reason, generation | occurrence | production of the clogging by the adhesion of the foreign material to the wall 63 can be prevented.

  Of the mixed fluid M projected toward the wall 63, a fluid F such as water vapor or diamine mist is guided to the T-shaped tube 13 by the wall 63 and is discharged out of the system through the exhaust pipe 53. The The same applies when only a fluid that does not contain a solid component is projected.

  At this time, since the periphery of the shaft 36 is sealed with the packing 40, the fluid F inside the T-shaped tube 13 is prevented from entering the inside of the shaft holder 35. The purge air A is supplied into the shaft holder 35 through the supply elbow 46 and the tube 45. The supplied purge air A is discharged from the discharge elbow 49. Therefore, the inside of the shaft holder 35 is filled with the purge air A, and this also prevents the fluid inside the T-shaped tube 13 from entering the inside of the shaft holder 35. That is, the fluid inside the T-shaped tube 13 is prevented double from entering the shaft holder 35. For this reason, the fluid F inside the T-shaped tube 13 leaks outside through the inside of the shaft holder 35, or diamine mist adheres to the bearings 38, 41, the shaft 36, etc. Can be prevented.

  In the above, the case where the solid / fluid separation device of the present invention is applied to a polyamide production device has been described. However, the separation device is used as a general solid / fluid separation device. be able to. In particular, it can be used very suitably for a mixed fluid that is difficult to use, such as a normal bag filter, such as a mixed fluid containing a high-boiling substance or an adhesive substance in addition to a solid.

12 cylindrical body 13 T-shaped tube 28 motor 35 shaft holder 36 shaft 45 air purge tube 56 rotary blade 58 blade body 59 baffle member 60 inflow port 61 receiving chamber 62 wall body 64 heating device M mixed fluid

Claims (4)

In the path through which the mixed fluid that contains the wet component and the solid component rises from the inside of the lower system toward the outside of the system,
A rotating blade for applying centrifugal force to the mixed fluid;
A wall constituting a storage chamber for storing the rotating blades, which receives the solid component of the mixed fluid projected outward along the radial direction of the rotating blades by the action of the centrifugal force, A solid-fluid separation device characterized by having a wall body that drops the received solid component into the system and does not inhibit discharge of the fluid out of the projected mixed fluid. .   The rotary blade covers a plurality of blade bodies arranged radially outward from the central portion and the central portion of the inflow portion of the mixed fluid in the rotary blade, and the mixed fluid flows into the central portion of the rotary blade. 2. The solid-fluid separation device according to claim 1, further comprising a baffle member that prevents the mixture fluid and guides the mixed fluid to the outer peripheral annular portion outside the center portion of the rotary blade.   3. The apparatus for separating solid and fluid according to claim 1, further comprising means for heating the wall body.   The solid and fluid according to any one of claims 1 to 3, wherein the solid and fluid are connected to a polyamide polymerization apparatus and used for a mixed fluid rising from the polymerization apparatus. Separation device.

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