JP2011056368A - Mist collector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mist collector which has enhanced performance of separating mist contained in air and can eliminate the need of maintenance. <P>SOLUTION: A multiple rotation cone 31 rotation-driven by an electric motor 21 is disposed in a case 12. The multiple rotation cone 31 is inclined to the rotation center and opened in the central part and has two or more conical cone separation plates 33 superimposed in the axial direction through air flow guiding clearances 32. Mist contained in a swirling air flow fed into a communication space 40 is adhered to the cone separation plates 33 and scattered outward in the radial direction by centrifugal force. The air with mist removed is discharged out of the central part of the multiple rotation cone 31 through a discharge passage 46. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mist collector that separates and removes mist of liquid such as oil contained in air from air by centrifugal force.

  When a workpiece such as a machine part is to be cut or ground, a cutting fluid or a grinding fluid is supplied to the workpiece to remove cutting heat and chips. The chips adhering to the workpiece after processing are removed by cleaning with a cleaning device. At this time, the cutting fluid and the cleaning fluid from the processing device and the cleaning device become mist-like droplets, so-called mist, and diffuse outside the mechanical device, which deteriorates the factory environment. As a countermeasure, the mist is sucked and removed by a mist collector.

  As a mist collector for removing mist, a type using a filter is usually used. As described in Patent Document 1, as the form of the filter, a filter plate fixed in the case, that is, a fixed filter type in which air containing mist is passed through the filter, and Patent Document 2 are described. In addition, there is a rotary filter type in which a cylindrical rotary filter is incorporated in a case. In this rotary filter type, air is supplied from the outside to a cylindrical filter that is driven to rotate, and the filtered air is discharged from the inside of the filter to the outside. Patent Document 3 discloses a rotating brush type mist collector in which a disk-type rotating brush is used instead of a filter. In the rotating brush type, mist and dust are attached to the rotating brush and air is cooled by spraying cooling water or cleaning liquid from the nozzle onto the rotating brush.

  As a type that does not use a filter, as described in Patent Document 4 and Patent Document 5, an air current containing mist is blown perpendicularly to the surface of the rotating disk, and the mist that collides with and adheres to the rotating disk is removed. There is a centrifugal mist collector that is separated from air by centrifugal force.

  Furthermore, the mist collector has an electric dust collection method in which the mist is charged. In a normal electric dust collection method, the mist is attached to the electrode. On the other hand, in Patent Document 6, a high voltage is applied to the positive electrode and the negative electrode to generate corona discharge, and air containing mist is passed between both electrodes so that the mist is aggregated by Coulomb force. An electric dust collection mist collector is described. Also in this type of electrostatic dust collection system, a filter is disposed downstream of both electrodes in order to collect agglomerated droplets.

JP-A-8-243332 JP 2006-289272 A JP 2006-175319 A JP-A-9-105399 JP 2008-119694 A JP-A-8-52314

  When a filter is used in both the fixed type and the rotary type described above, the airflow resistance of the filter is added to the air flow, so that the power consumption of the fan that generates the air flow becomes larger than that of the electric dust collection method. Moreover, if the filter is clogged and exceeds the absorption limit, the mist will be swept away by the air flow and re-scattered downstream, losing its function as a filter. As described in Patent Document 1, it is necessary to spray cleaning water on the filter in order to remove clogging. However, by simply spraying the cleaning liquid on the filter, fine chips clogged with the filter cannot be removed, and maintenance-free by automatic cleaning is difficult. In a rotary filter, the mist adhering to the filter is scattered outside the filter by the centrifugal force of the filter, so the filter can be clogged less than the fixed filter type. It is difficult to completely remove solid particles and the like that have penetrated into the filter. For this reason, the solid particles that have sunk into the filter's eyes lose their rotational balance, causing vibration in the filter and damaging the bearing.

  In a rotating brush type mist collector that does not use a filter, it is necessary to spray cooling water or cleaning liquid from the nozzle to the rotating brush in order to allow mist and dust to adhere to the rotating brush and cool the air. And cleaning solution must be used.

  In the centrifugal mist collector described in Patent Document 4 and Patent Document 5, it is possible to wash the rotating disk by supplying industrial water, coolant liquid, or the like to the centrifugal separation chamber. In such a structure, it cannot be said that the effect of centrifugal separation is sufficiently drawn out, and there is a limit to separating fine mist by centrifugal force, so a filter is provided on the downstream side to ensure separation performance. For this reason, the maintenance of the filter is required even in the centrifugal type.

  On the other hand, in a dust collector electrode mist collector in which mist is attached to the dust collector electrode plate, the mist is attached to the dust collector electrode plate in the form of tar, so it is not easy to remove it. The removal work must be done by skilled specialists. Although there is a type that automatically cleans the dust collecting electrode plate, a heater for producing hot water and a washing pump for spraying are required, and this type of mist collector is expensive. Moreover, as described in Patent Document 6, in the electrostatic dust collection system in which mist is aggregated by corona discharge, it is necessary to dispose a filter on the downstream side in order to remove the aggregated droplets.

  The objective of this invention is providing the mist collector which improves the isolation | separation performance of the mist contained in the air.

  Another object of the present invention is to provide a mist collector that can dispense with maintenance.

  The mist collector of the present invention is a mist collector that removes mist of liquid contained in air, and has a cylindrical shape in which a separation chamber communicating with an inflow port provided at an upper end portion is formed inside and arranged vertically The case body, a rotation shaft that is rotatably mounted in the upper end portion of the case body, and is driven by an electric motor attached to the case body, and a center portion that is inclined with respect to the rotation center of the rotation shaft. A plurality of conical conical separating plates that are opened and overlapped in the axial direction via the airflow guide gap are connected to the rotating shaft to swirl the airflow that flows radially inward through the airflow guide gap. The mist contained in the airflow is attached to each of the conical separation plates to scatter radially outward, and the multiple rotating cone is connected to the rotary shaft, and the airflow flowing in from the inlet is An impeller that swirls and feeds airflow into a communication space between the inner surface of the case body and the outer surface of the multiple rotation cone; and a lower end portion of the case body that passes through a central portion of the multiple rotation cone. It is characterized by having an exhaust cylinder that partitions an air flow from which mist has been separated into an outside exhaust passage for guiding the air flow to the outside and an outside drain chamber into which the mist flows.

  The mist collector of the present invention is provided with a plurality of blades for turning the air flowing inward in the radial direction while turning through the air flow guide gap in a direction opposite to the rotation direction of the conical separation plate. It is characterized by. In the mist collector of the present invention, a holder that rotatably supports the rotating shaft is attached to the top plate of the case body, and the multiple rotating cone is suspended from the holder via a driving member attached to the rotating shaft. It is characterized by holding in a state. In the mist collector of the present invention, a plurality of support rods that support the multi-rotating cone at the outer periphery thereof are connected to the rotation shaft at respective upper ends, and the support rods are fixed at the lower ends. It is characterized by connecting by.

  According to the present invention, the airflow flowing along the conical separation plate in the airflow guide gap flows from the radially outer side to the inner side of the multi-rotating cone, and the mist contained in the airflow is caused by centrifugal force on the upper surface of the conical separation plate. Adhere to. The mist adhering to the conical separation plate becomes a liquid film, moves against the air flow radially outward of the conical separation plate, adheres to the inner peripheral surface of the circumferential portion of the inner surface of the case body, and falls into the drain chamber To do. On the other hand, since the airflow from which the drain has been removed is discharged to the outside through the exhaust passage from the center of the multiple rotating cone, it is possible to reliably remove mist having a fine particle size without using a filter. . Thereby, the mist contained in the air can be removed with high separation performance.

  Even if solid particles adhere to the conical separation plate, the solid particles slip on the slope of the conical separation plate by centrifugal force and flow out to the inner peripheral surface of the cylindrical portion of the case body, so the solid particles adhere to the conical separation plate. Hateful. Furthermore, if the cleaning liquid is periodically supplied to the multi-rotation conical cylinder, the solid particles adhering to the conical separation plate can be completely washed away, so that maintenance is not required.

  Compared to the case where mist is removed by a filter, the resistance to air passing through the multi-rotating cone is small, so there is less air pressure loss and the capacity of the electric motor for generating airflow can be reduced. , Power consumption can be reduced.

  When the filter is used, it is necessary to replace the filter. However, since the filter is not required to be replaced, the cost for replacing the filter is not required, and the running cost can be reduced. Moreover, the cleaning work of the electrode plate is not required unlike an electric dust collector.

It is sectional drawing which shows the mist collector which is one embodiment of this invention. It is an expanded sectional view which shows a part of FIG. FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 1. FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. It is a top view which shows the drive member shown by FIG. 1, and the support rod attached to this. (A) is the 7A-7A sectional view taken on the line in FIG. 6, (B) is the left view seen from the 7B direction of (A). It is an expanded sectional view which shows a part of multiple rotation cone. (A) is a perspective view showing one conical separating plate, (B) is an enlarged cross-sectional view showing a state in which a support bar is assembled to a notch formed in the conical separating plate.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A mist collector 10 shown in FIG. 1 has a case body 12 in which a separation chamber 11 is formed. The case body 12 is formed by a cylindrical portion 12a, a top plate 12b fastened to the upper end portion by a bolt 13, and a bottom plate 12c fixed to the lower end portion. A plurality of leg pieces 14 are attached to the outer periphery of the lower end portion of the case body 12, and the case body 12 is installed on the support base by the leg pieces 14 so as to face in the vertical direction.

  As shown in FIG. 1, an inlet 15 into which air containing mist flows is formed at the upper end of the cylindrical portion 12 a of the case body 12 so as to communicate with the separation chamber 11. A dust separator 16 is attached to the case body 12 so as to communicate with the inflow port 15, and a duct 17 for guiding air containing mist is connected to the case body 12 via the dust separator 16. ing. In the dust separator 16, a foreign matter removing plate 18 made of a mesh-like wire net is provided to remove solids such as chips contained in the air guided by the duct 17. The mist collector 10 is installed in the vicinity of the cutting machine or the grinding machine, and air containing the mist of the cutting fluid or the grinding fluid is supplied to the separation chamber 11 of the case body 12 through the duct.

  An electric motor 21 is mounted on the top plate 12b in the center in the radial direction, and a main shaft 21a of the electric motor 21 projects vertically through the top plate 12b. A hollow cylindrical holder 22 is attached to the lower surface of the top plate 12 b, and the flange of the holder 22 and the flange of the electric motor 21 are fastened to the top plate 12 b by bolts 23. A spindle shaft, that is, a rotating shaft 24 that is rotatably mounted inside the holder 22 is connected to a main shaft 21a of the electric motor 21, and the upper end of the rotating shaft 24 is supported by the holder 22 via a bearing 25a. The lower end is supported by the holder 22 via the bearing 25b. As shown in FIG. 4, the lower end portion of the rotating shaft 24 has a base portion 26a and four rod portions 26b that are integral with the base portion 26a and extend in the radial direction. 26 is attached. As shown in FIG. 2, a connection flange 27 is fixed to the base portion 26 a, and the rotation shaft 24 is fastened to the drive member 26 by attaching the connection flange 27 to the rotation shaft 24 with a bolt or the like. The rotating shaft 24 is supported by the holder 22 so as to be restricted from moving downward, and the driving member 26 fixed to the rotating shaft 24 is held in a state suspended from the holder 22.

  As shown in FIGS. 1 and 2, a guide plate 19 is disposed on the cylindrical portion 12 a of the case body 12 so as to be positioned between the inlet 15 and the drive member 26. The guide plate 19 has an annular horizontal portion 19a and a cylindrical portion 19b provided at the center thereof, and is attached to the top plate 12b by a plurality of suspension rods 20 screwed to the top plate 12b. It has become. The upper end portion of the cylindrical portion 19b is a tapered portion so that the diameter increases upward, and the guide plate 19 guides the air containing the mist flowing in from the inlet 15 downward from the central portion of the separation chamber 11. To do.

  Between the guide plate 19 and the drive member 26, a rectifying plate 28 for guiding the air flowing downward by the cylindrical portion 19b of the guide plate 19 to the outer peripheral portion in the case body 12, that is, the outer peripheral portion of the separation chamber 11, is mounted. Has been. The rectifying plate 28 has a horizontal portion 28a and a cylindrical portion 28b that protrudes downward from the outer peripheral portion thereof, and a bolt 29 that passes through the horizontal portion 28a and is fastened to the drive member 26 via a connecting flange 27. The rectifying plate 28 is fixed to the driving member 26. As shown in FIG. 3, a plurality of impellers 30 are fixed on the upper side of the current plate 28, and a centrifugal blower is formed by the impellers 30. Therefore, when the electric motor 21 is driven and the drive member 26 is rotationally driven in the direction indicated by the arrow R in FIG. 3, the airflow flowing from the inlet 15 by the impeller 30 connected to the drive member 26 via the rectifying plate 28. Is blown radially outward while turning in the direction indicated by the arrow R, and then sent downward in the outer peripheral portion of the separation chamber 11.

  As shown in FIG. 1, the drive member 26 is mounted with a multiple rotation cone 31 coaxial with the rotation shaft 24, and the multiple rotation cone 31 is connected to the rotation shaft 24. As shown in FIG. 2, the multiple rotation cone 31 is inclined in the axial direction with respect to the rotation center axis O of the rotation shaft 24 and is overlapped in the axial direction, that is, in the vertical direction via the airflow guide gap 32. A separation plate 33 is provided. Each conical separation plate 33 is formed with an opening 34 at the center, with the small diameter portion being the lower end portion and the large diameter portion being the upper end portion. Each airflow guide gap 32 has a conical shape inclined downward toward the center so that the diameter decreases from the outer peripheral portion to the inner peripheral portion of the multiple rotating cone 31. Accordingly, the multiple rotation cone 31 has a generally cylindrical shape with a through hole formed in the center, and the plurality of cone separation plates 33 constituting the multiple rotation cone 31 have an angle θ with respect to the rotation center O. Inclined. The inclination angle θ is 40 degrees in the figure, and is inclined 50 degrees with respect to the horizontal line.

  In order to attach the multiple rotating cone 31 to the drive member 26, as shown in FIGS. 2 and 4, the support rod 35 is fastened to the four rod portions 26b of the drive member 26 by bolts 36 at the upper end portions, respectively. Has been. As shown in FIG. 9 (A), notches 33a that mesh with the support bar 35 are formed at intervals of 90 degrees in the circumferential direction on the outer periphery of the upper end of each conical separating plate 33. The plate 33 is attached to the support bar 35 so that the notch 33 a holds the support bar 35. FIG. 9B shows a state in which the support bar 35 is engaged with the support bar 35 so that the notch 33a of the conical separating plate 33 is included. Since the width dimension D2 of the notch 33a is set to be slightly larger than the width dimension D1 of the support bar 35, the plurality of conical separation plates 33 are radially outside in a state where they are overlapped with a gap. The support bar 35 can be easily assembled to the plurality of conical separation plates 33 by inserting each support bar 35 into the notch 33a.

  As shown in FIG. 8, each support bar 35 is formed with an inclined contact surface 37 that contacts the outer peripheral surface of the cone separation plate 33 corresponding to every other cone separation plate 33 in the vertical direction. Has been. The inclined contact surfaces 37 are provided in pairs with the two support rods 35 facing each other out of the four support rods 35, and the lower surfaces of the outer peripheral portions of the same cone separating plate 33 are mutually connected. The two support bars 35 facing each other are in contact with and supported by the inclined contact surfaces 37.

  Accordingly, each of the conical separation plates 33 is attached to the support bar 35 with the four notches 33a meshing with the support bar 35, and is formed at two locations formed on the two support bars 35 facing each other. It is supported by the support bar 35 in a state of being in contact with the inclined contact surface 37. As a result, the conical separating plates 33 adjacent to each other in the vertical direction are positioned and contacted with the inclined contact surface 37 at a position shifted by 90 degrees.

  As shown in FIG. 2 and FIG. 6, a fixing ring 38 is fastened to the lower end of each support bar 35 by a bolt 39, and the four support bars 35 are fixed to each lower end by the fixing ring 38. Are interconnected. As described above, the plurality of conical separation plates 33 are formed into a cylindrical shape as a whole by the support bar 35 attached to the drive member 26 and the fixing ring 38 fixed to each support bar 35, and the outer peripheral surface and the case body A communication space 40 is formed between the inner peripheral surfaces of the 12 cylindrical portions 12a. The airflow sent by the impeller 30 flows into the communication space 40 while being guided by the rectifying plate 28, and the airflow is supplied from the communication space 40 into the airflow guide gaps 32.

  As shown in FIGS. 2 and 8, the multiple rotating cone 31 shown in the figure has 23 conical separation plates 33, and a total of 22 airflow guide gaps 32 are provided between the conical separation plates 33. Is formed in the multiple rotation cone 31. However, the number of conical separation plates 33 forming the multiple rotating cone 31 is not limited to the number shown in the figure, and can be arbitrarily set according to the air volume processed by the mist collector 10. When the impeller 30 and the multiple rotation cone 31 are rotationally driven by the electric motor 21 via the rotating shaft 24 and the drive member 26, the air flow generated by the impeller 30 flows into the communication space 40 as a swirl flow, It flows into the airflow guide gap 32 of the multiple rotation cone 31 that is rotationally driven while turning. At that time, the mist adheres to the inner inclined surface of each conical separating plate 33 by centrifugal force. The attached mist is scattered radially outward by the centrifugal force applied by the rotating conical separation plate 33.

  On the other hand, the air that has flowed into the airflow guide gaps 32 of the multiple rotating cones 31 from the radially outer side flows radially inward while turning.

  As shown in FIG. 5, the multiple rotating cone 31 is provided with a plurality of blades 42 positioned at the radial center of each airflow guide gap 32. A turbine is formed by these blades 42, and the blades 42 receive rotational energy from the swirling airflow while passing through the airflow guide gap 32 inward in the radial direction, so that rotational force, that is, rotational torque, is applied to the multiple rotating cone 31. Is added. Thereby, the load of the electric motor 21 can be reduced and the energy consumption of the electric motor 21 can be reduced. The airflow that imparts rotational torque to the blade 42 loses rotational energy and is discharged downward.

  As shown in FIG. 1, a discharge cylinder 44 having a diameter slightly smaller than the inner diameter of the opening 34 provided at the center of the multiple rotation cone 31 is attached to the bottom plate 12 c of the case body 12. As shown in FIG. 2, there is a small gap δ between the outer peripheral surface of the discharge cylinder 44 and the inner peripheral surface of the lip portion 43 provided on the lowermost cone separation plate 33 of the multiple rotation cone 31. The lowermost conical separation plate 33 is formed so as to rotate around the discharge cylinder 44 with this gap δ. The inside of the discharge cylinder 44 is an exhaust passage 46 that communicates with an exhaust port 45 formed in the bottom plate 12 c, and the airflow that gives rotational torque to the blade 42 is discharged to the exhaust passage 46. The outside of the discharge cylinder 44 is a drain chamber 47 partitioned by the cylindrical portion 12a of the case body 12 and the bottom plate 12c. A discharge pipe 48 communicating with the drain chamber 47 is attached to the bottom plate 12c, and the liquid flowing into the drain chamber 47 is discharged to the outside through the discharge pipe 48.

  The airflow supplied from the duct 17 contains not only mist but also fine solid particles such as chips. The solid particles may adhere to the inner peripheral surface of the conical separation plate 33 due to centrifugal force and gradually accumulate. When solid particles such as chips accumulate and the airflow guide gap 32 is blocked, the pressure loss of the air flowing through the airflow guide gap 32 increases and the processing flow rate decreases. In addition, when the distribution of the solid particle deposition is biased, the rotation of the multiple rotating cone 31 becomes unbalanced and vibration may occur. For this reason, as shown in FIG. 1, the top plate 12b is provided with a liquid supply port 51, and a cleaning liquid such as water or coolant is periodically sprayed toward the impeller.

  When the cleaning liquid is sprayed from the liquid supply port 51 to the inside of the cylindrical portion 19b of the guide plate 19 under the state where the drive member 26 is rotationally driven by the electric motor 21, the cleaning liquid scattered by the impeller 30 is dispersed and each Flows into the air flow guide gap 32. When the supply of electric power to the electric motor 21 is stopped under this state, the sprayed cleaning liquid becomes a brake, and the electric motor 21 rapidly stops and stops. When the rotation of the multiple rotation cone 31 stops, the cleaning liquid in the airflow guide gap 32 falls off due to its own weight and peels off the solid particles attached to the cone separation plate 33. The liquid supply port 51 may be provided in the cylindrical portion 12 a of the case body 12 so that the cleaning liquid is sprayed on the outer peripheral portion of the multiple rotation cone 31.

  In order to process the air containing mist using the mist collector 10 and separate the mist from the air, the electric motor 21 rotates and drives the multiple rotating cone 31 and the impeller 30 via the driving member 26. Under the condition, air is supplied from the duct 17 to the mist collector 10. The air that flows into the separation chamber 11 from the inlet 15 flows into the inside of the cylindrical portion 19b of the guide plate 19 and radially outwards toward the inner surface of the cylindrical portion 12a of the case body 12 by the impeller 30 as a centrifugal blower. And flows into the communicating space 40 radially outward of the multiple rotating cone 31 while turning. The airflow that has flowed into the communication space 40 flows into each airflow guide gap 32 of the multiple rotation cone 31 while turning from the outer peripheral portion.

  The airflow that flows into each airflow guide gap 32 flows in the airflow guide gap 32 downward in the radial direction while rotating together with the multiple rotation cone 31 that is rotationally driven. Centrifugal force is applied to the mist contained in the airflow flowing in the airflow guide gap 32 by the swirling airflow, and the mist adheres to the upper surface of each conical separation plate 33 to form a liquid film. The liquid film adhering to the upper surface flows backward outward in the radial direction by the centrifugal force applied from the conical separation plate 33, and becomes droplets L from the outer peripheral portion of the conical separation plate 33 and scatters outward in the radial direction. To do. The scattered liquid droplet L adheres to the inner surface of the cylindrical portion 12 a of the case body 12 and falls into the drain chamber 47.

  On the other hand, air that has flowed out from the lower end of each airflow guide gap 32 and from which the mist has been removed applies rotational energy to the multiple rotating cone 31 when passing through the blade 42 forming the turbine while turning. become. The airflow with rotational energy applied to the blade 42 is discharged to the outside through the exhaust passage 46.

  For example, the thickness of the conical separation plate 33 is 1.6 mm, the radial gap d of the airflow guide gap 32 is 6 mm, the length of the conical separation plate 33 is 0.145 m, the passing air speed is 0.85 m / s, and the conical separation is performed. If the average diameter of the plate 33 is 0.32 m and the rotation speed of the multiple rotating cone 31 is 2800 rpm, the centrifugal force acting on the cone separating plate 33 is 1500 times the gravitational acceleration.

  On the other hand, when the specific gravity of the mist is 1 (specific gravity of water) and the particle diameter of the mist is 1 μm, the speed of sedimentation in the air under the gravity according to the Stokes formula is 0.03 mm / s. Since the sedimentation speed acting on small droplets having a particle size of about 1 μm is proportional to the multiple of gravitational acceleration according to Stokes' law, the sedimentation speed when sedimenting toward the upper surface of the conical separation plate 33 is 0.03 × 1500 = 45 mm / s. The passage time of the airflow flowing through the conical separation plate 33 having a length of 0.145 m is 0.145 ÷ 0.850 = 0.17 seconds, and therefore 45 × 0.17 = 7.6 mm. Since the radial direction dimension of the airflow guide gap 32 is 6 mm, the mist particles are centrifuged and attached to the conical separation plate 33 while passing through the airflow guide gap 32.

  Therefore, under this condition, 1 μm particles adhere to the upper surface of the conical separation plate 33 before the conical separation plate 33 passes through, and mist is reliably separated from the air. Particles having a particle size of 1 μm or less are usually called fumes and are difficult to remove even with a filter, but as described above, a large number of airflow guides formed by overlapping a plurality of conical separation plates 33 through gaps. It is possible to separate the mist particles by applying a centrifugal force to the air gap 32 while passing the air current containing the mist through the gap 32. When the mist adheres to the conical separation plate 33, a liquid film is formed on the upper surface of the conical separation plate 33 by the mist, but the liquid film receives a centrifugal force from the rotating conical separation plate 33 along the conical separation plate 33. Ascending and moving outward in the radial direction, droplets are scattered from the outer peripheral portion of the conical separating plate 33 to the inner peripheral surface of the cylindrical portion 12 a of the case body 12. The scattered liquid droplets are caused to flow downward by their own weight along the inner surface of the cylindrical portion 12 a and are accommodated in the drain chamber 47. By coating the surface of the conical separating plate 33 with a tetrafluoroethylene polymer, it is possible to prevent the solid particles from adhering and to improve the scattering performance of the adhering liquid film.

  The inclination angle θ of the conical separation plate 33 shown in the figure is 40 degrees. However, the inclination angle θ is a liquid film that adheres to the conical separation plate 33 and the mist that forms a liquid film outwards along the conical separation plate 33 due to centrifugal force. The angle is not limited to 40 degrees and can be arbitrarily set depending on the number of rotations of the multi-rotating cone 31, the flow velocity of the airflow, and the like.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, when a blowing fan is applied to the air supplied from the duct 17 to the separation chamber 11 by a blower fan, an air flow from the upper part to the lower part is generated in the separation chamber 11 without using the impeller 30.

DESCRIPTION OF SYMBOLS 10 Mist collector 11 Separation chamber 12 Case body 12a Cylindrical part 12b Top plate 12c Bottom plate 15 Inlet 19 Guide plate 21 Electric motor 22 Holder 24 Rotating shaft 26 Driving member 28 Current plate 30 Impeller 31 Multiple rotation cone 32 Airflow guide gap 33 Cone Separation plate 34 Opening 40 Communication space 42 Blade 44 Discharge cylinder 45 Exhaust port 46 Discharge flow path

Claims (4)

A mist collector for removing mist of liquid contained in air,
A separation chamber communicating with an inlet provided at the upper end is formed inside, and a cylindrical case body arranged in the vertical direction;
A rotary shaft that is rotatably mounted in the upper end of the case body and is driven by an electric motor attached to the case body;
A plurality of conical conical separating plates, each of which is inclined with respect to the rotation center of the rotation shaft and has a central portion opened and overlapped in an axial direction through an air flow guide gap; A multiple rotating cone that swirls the airflow flowing in the guide gap radially inward, attaches the mist contained in the airflow to each of the cone separation plates and scatters radially outward, and
An impeller connected to the rotating shaft and for sending the airflow flowing in from the inlet into the communication space between the inner surface of the case body and the outer surface of the multiple rotating cone;
Provided at the lower end portion of the case body and partitioned into an inner exhaust passage for guiding the air stream separated from the mist passing through the central portion of the multiple rotating cone and the outer drain chamber into which the mist flows. A mist collector having a discharge cylinder.   2. The mist collector according to claim 1, wherein a plurality of blades that turn the air flowing inward in the radial direction while turning through the air flow guide gap in a direction opposite to a rotation direction of the conical separation plate are turned. A mist collector characterized by being provided.   3. The mist collector according to claim 1, wherein a holder that rotatably supports the rotating shaft is attached to a top plate of the case body, and the multiple rotating cone is attached to the holder via a driving member attached to the rotating shaft. A mist collector characterized by being held in a suspended state.   The mist collector according to any one of claims 1 to 3, wherein a plurality of support rods that support the multiple rotating cones at the outer periphery thereof are connected to the rotating shaft at respective upper ends, A mist collector characterized in that the support bar is connected by a fixing ring at the lower end.

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