JP2005111450A - Cyclone type centrifugal separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cyclone type centrifugal separator capable of enhancing a separation performance for separating fine materials, preventing a clogging efficiently and maintaining a filtering performance for a long period of time. <P>SOLUTION: This cyclone type centrifugal separator 1 is provided with a cyclone section 2 in which liquid containing the fine materials is supplied from a liquid introducing passage 5, a whirlpool is produced at a predetermined flow rate to move the fine materials outside in a centrifugal state and fluid from which the fine materials is separated is discharged from a liquid withdrawal passage 4, and further, the whirlpool is decelerated to precipitate separated fine materials. Further, a metallic mesh 90 for filtering the fine materials is provided at an opening of the liquid withdrawal passage 4 and the same charge as that of the fine materials is given to the metallic mesh 90. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cyclone type centrifugal separation device that separates and removes fine substances such as fine powdery debris contained in a fluid.

  For example, in a machining apparatus, cutting is performed while supplying a cutting fluid from a supply tank, and the cutting fluid contains fine powder cutting scraps. The cutting fluid containing the fine powdery cutting waste is supplied to the filter device, the cutting waste is removed by the filter device, and the cutting fluid is returned to the supply tank (for example, Patent Document 1).

  Such filter devices include, for example, those that remove cutting debris with a filter membrane or those that remove sediment by sedimentation, but all of them are fine powdery cutting debris contained in a large amount in the cutting fluid. There is a problem that it cannot be reliably removed in a short time by the apparatus. In addition, the filter membrane may be clogged. If the filter membrane is clogged, the filter device must first be disassembled and the filter membrane must be cleaned. When this cleaning work or use becomes impossible, replacement work occurs. In addition, when the filter membrane is used repeatedly, the filtration accuracy deteriorates and the filter membrane is likely to be clogged. Therefore, most of the filter membrane is a disposable filter membrane, and there is a problem that costs are increased.

  When a cyclone centrifugal device is used instead of such a filter device, a liquid containing fines is swirled at a predetermined flow rate from the liquid introduction passage, and the fines are moved outwardly in a centrifugal state from the liquid outflow passage. Since the fluid from which the fine objects are separated is discharged and the separated fine objects are settled by decelerating the spiral, problems such as clogging are solved (for example, Patent Document 2).

In such a cyclone type centrifugal separator, there is a type in which a filter is provided at the opening of the liquid outflow passage in order to increase the separation efficiency for separating fines (for example, Patent Document 3).
JP 2001-137743 A JP-A-10-286493 JP-A-10-286493

  By the way, if a filter is provided at the opening of the liquid outflow passage, clogging occurs. Therefore, it is necessary to take out the filter from the cyclone centrifuge, and to clean and replace it.

  The present invention has been made in view of such circumstances, and improves the separation performance for separating fine objects, efficiently prevents clogging, and can maintain the filtration performance for a long period of time. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is a fluid in which a liquid containing fines is supplied from a liquid introduction passage to generate a vortex at a predetermined flow rate, and the fines are moved outward in a centrifugal state to separate the fines from the liquid outflow passage. And a cyclone section that decelerates the spiral and settles the separated fines,
Provide a metal mesh for filtering the fines at the opening of the liquid outflow passage,
The cyclone centrifugal device is characterized in that the same charge as that of the fine substance is applied to the metal mesh.

  The invention according to claim 2 is characterized in that an electrode rod is disposed at the axial center position of the cyclone portion, and the same charge as that of the fine material is applied to the electrode rod. Type centrifuge.

  A third aspect of the present invention is the cyclonic centrifugal separator according to the first or second aspect, wherein a charge opposite to the charge of the fine substance is applied to the cyclone portion.

  A fourth aspect of the present invention is the cyclone centrifugal separator according to the third aspect, wherein a punching metal is attached to the inner wall of the cyclone portion.

  The invention described in claim 5 is characterized in that the same charge as the charge of the fine object is given to the metal mesh based on at least one of intermittent or pressure loss. The cyclone-type centrifuge according to item 1.

With the above configuration, the present invention has the following effects.

According to the first aspect of the present invention, the fine matter separated by moving the fine matter outward in the centrifugal state and separating the fine matter from the liquid outflow passage by filtering with a metal mesh and decelerating the spiral. The separation performance for separating fine substances is improved by allowing the precipitate to settle and performing separation by centrifugation and filtration. In addition, by applying the same charge to the metal mesh as the charge of fine objects, the fine objects can be separated from the metal mesh charges to effectively prevent clogging and maintain filtration performance for a long period of time. can do.

  In the invention according to claim 2, the electrode rod is arranged at the axial center position of the cyclone portion, and the same charge as the charge of the minute object is given to the electrode rod, so that the minute object is moved outward in the centrifugal state. In addition, since the fine material is moved in the direction of the inner wall of the cyclone portion by the charge of the electrode rod, the separation performance for separating the fine material is improved.

  In the invention according to claim 3, in addition to moving the fine object outward in a centrifugal state by applying a charge opposite to the charge of the fine object to the cyclone part, the fine object is removed from the cyclone by the charge of the cyclone part. Since it moves to the inner wall direction of a part, the separation performance which isolate | separates a fine substance improves more.

  In the invention according to claim 4, overcurrent can be prevented by attaching a punching metal to the inner wall of the cyclone portion.

  In the invention according to claim 5, by applying the same charge as that of the fine object to the metal mesh based on at least one of intermittent or pressure loss, the fine object is separated by the charge of the metal mesh. It is possible to efficiently prevent clogging and maintain filtration performance for a long time.

  Hereinafter, although the embodiment of the cyclone type centrifugal separator of the present invention will be described, the present invention is not limited to this embodiment. The embodiment of the present invention shows the most preferable mode of the present invention, and the terminology of the present invention is not limited to this.

  The cyclone centrifuge of this embodiment is used for filtering fine materials such as pharmaceutical, chemical, food and beverage ingredients, and for collecting fine materials such as cutting powders for automobiles, machine tools and processing industries. Used for filtration of circulating water and wastewater in factories, water treatment, etc., removal of fines such as impurities such as semiconductors and biotechnology, and removal of fines such as washing water and solvents, etc. Widely used for separating and removing contained fines.

  An example of the cyclone centrifugal device of this embodiment is shown in FIGS. FIG. 1 is a cross-sectional view of a cyclone centrifuge, FIG. 2 is a plan view of the cyclone centrifuge, and FIG. 3 is a perspective view showing an electrode rod fixture.

  In this embodiment, a case where the machine tool is used for collecting fine objects such as cutting powder in the processing industry will be described. In this embodiment, although it is used about the case where the fine thing of fine powdery waste contained in a liquid is removed, it should just be a fine thing and is not limited to fine powdery waste.

  The cyclone centrifuge 1 of this embodiment has a cyclone part 2 and a particle collection box 3 in the vertical direction. The cyclone part 2 is comprised from the cylinder 2a, the cyclone body 2b, and the cover body 2c. A cyclone body 2b is inserted into the cylinder 2a, and a lid 2c is attached to the upper part.

  The cyclone body 2b is formed of a conductive metal such as SUS, and the cylinder 2a is formed of an insulator such as resin. The lid 2c is formed of an insulating material such as resin, and the lid 2c has a liquid outflow passage 4 at the shaft core and a liquid introduction passage 5 at a position displaced from the shaft core.

  The liquid outflow passage 4 is formed by a tube body 6 penetrating the lid 2c, and the tube body 6 is formed of a conductive metal such as SUS. The liquid introduction passage 5 is formed by a tube body 7 formed integrally with the lid body 2c.

  The cyclone body 2 b has two upper and lower tapered portions 2 b 1 and 2 b 2, and the lower tapered portion 2 b 2 communicates with the particle collection box 3 through the communication hole 8. In this cyclone section 2, a liquid containing fines is supplied from the liquid introduction passage 5 to generate a vortex at a predetermined flow rate, and the fluid that has separated the fines from the liquid outflow passage 4 by moving the fines outward in a centrifugal state. Discharge and decelerate the vortex to settle the separated fines.

  The separated fine matter that settles in the cyclone section 2 falls and accumulates in the particle collection box 3 through the communication hole 8. In the particle collection box 3, a drain valve 9 is connected to the lower discharge hole 3 a, and the drain valve 9 discharges the fine substance accumulated in the particle collection box 3.

  In the cyclone centrifuge 1 of this embodiment, the electrode rod 10 is disposed at the axial center position of the cyclone unit 2. As shown in FIGS. 1 and 3, the electrode rod 10 has a fixture 11 fixed to the upper end 10 a of the electrode rod 10 attached to the inside of the tube body 6. The fixture 11 has four attachment pieces 11a, and can discharge a fluid from which fine objects have been separated from between the attachment pieces 11a while attached to the inside of the tube body 6. The fixture 11 is made of a conductive metal such as SUS.

  As shown in FIG. 1, the electrode rod 10 extends from the cyclone portion 2 through the communication hole 8 to the center of the particle collection box 3. The voltage applying means 12 applies the same charge as that of the fine object to the electrode rod 10 through the tube body 6 and the fixture 11. In this embodiment, since the fine substance contained in the liquid is negatively charged due to static electricity generated in the treatment process, a negative potential is applied to the tube body 6, the fixture 11, and the electrode rod 10 as a negative electrode. Is given.

  Further, the voltage applying means 12 applies a charge opposite to the charge of the fine object to the cyclone unit 2. In this embodiment, a positive potential is applied as a positive electrode by applying a positive potential to the cyclone body 2b of the cyclone unit 2.

  Further, a metal mesh 90 is provided at the opening of the liquid outflow passage 4 so as to filter fine objects, and the metal mesh 90 is attached between the electrode rod 10 and the lower end of the tube body 6.

  The cyclone centrifugal device 1 of this embodiment moves the fine objects to the outside in a centrifugal state, and filters and discharges the fluid separated from the liquid outflow passage 4 through the metal mesh 90, and decelerates the vortex. The separated fines are allowed to settle. Thus, the separation performance for separating fine objects is improved by performing separation by centrifugation and separation by filtration.

  In addition to disposing the electrode rod 10 at the axial center position of the cyclone unit 2 and applying the same charge as the charge of the fine material to the electrode rod 10, the fine material is moved outside in the centrifugal state, Since the fine material is moved toward the inner wall of the cyclone portion 2 by the electric charge of the rod 10, the separation performance for separating the fine material is improved.

  Further, by applying a charge opposite to the charge of the fine object to the cyclone unit 2, the fine object is moved outward in the centrifugal state, and the fine object is moved toward the inner wall of the cyclone unit 2 by the charge of the cyclone unit 2. Therefore, the separation performance for separating fines is further improved.

  Further, by applying the same charge as that of the fine object to the metal mesh 90 through the tube body 6 and the electrode rod 10, the fine object is clogged as the fine object is separated by the charge of the metal mesh 90. Can be efficiently prevented and the filtration performance can be maintained for a long time.

  Further, the cyclone centrifugal separator 1 of this embodiment is provided with a liquid introduction pressure detection sensor 20 for detecting the liquid introduction pressure from the liquid introduction passage 5 and detects the liquid outflow pressure from the liquid outflow passage 4. A liquid introduction pressure detection sensor 21 is provided, and the pressure information is sent to the control means 22. The control means 22 obtains a pressure loss based on the liquid introduction pressure and the liquid outflow pressure, and controls the voltage application means 12 when the pressure loss is greater than or equal to a predetermined value to give the metal mesh 90 the same charge as that of fine objects. You may do it.

  Further, the control means 22 may control the voltage application means 12 based on the time information of the timer 23 so as to intermittently apply the same charge as the charge of the fine object to the metal mesh 90. As described above, the metal mesh 90 is not charged at all times, and the same charge as that of the fine object is applied based on at least one of intermittent or pressure loss, so that the fine object is separated by the charge of the metal mesh 90. Thus, clogging can be effectively prevented and the filtration performance can be maintained for a long time.

  In this embodiment, the same charge as the charge of the fine object is applied to the metal mesh 90 via the tube body 6 and the electrode rod 10, and the charge opposite to the charge of the fine object is applied to the cyclone unit 2. However, the present invention is not limited to this as long as the metal mesh 90 has a structure that imparts the same charge as that of the fine object. For example, the same charge as the charge of the fine object may be directly applied to the metal mesh 90 without passing through the tube body 6 and the electrode rod 10, and the charge opposite to the charge of the fine object may not be applied to the cyclone unit 2, The metal mesh 90 may be given the same charge as that of the fine object.

  Next, an example of a cyclone centrifuge of another embodiment is shown in FIGS. FIG. 4 is a cross-sectional view of the cyclone centrifuge, and FIG. 5 is a plan view of the cyclone centrifuge. The cyclone centrifuge 1 of this embodiment is formed by forming a cylinder 2a, a cyclone body 2b, and a lid 2c constituting the cyclone part 2 of the embodiment of FIGS. 1 to 3 with an insulator such as an integral resin. The other same configurations are denoted by the same reference numerals and the description thereof is omitted.

  In the cyclone centrifugal separator 1 of this embodiment, a punching metal 30 is attached to the inner wall of a cyclone unit 2 formed of an insulating material such as an integral resin. The punching metal 30 is charged with a charge opposite to that of the fine object, and the overcurrent can be prevented by attaching the punching metal 30. In addition to moving the fine object outward in a centrifugal state, the charge of the cyclone unit 2 As a result, the fine material is moved in the direction of the inner wall of the cyclone unit 2, so that the separation performance for separating the fine material is further improved.

  This cyclone centrifuge is used for filtering fine materials such as pharmaceuticals, chemicals, foods, and beverages, and for collecting fines such as cutting powder from automobiles, machine tools, and processing industries. Used for filtration of circulating water, wastewater, etc., for removal of fine substances such as semiconductors, bio, and other impurities, and for removal of fine substances such as washing water and solvents, etc. Is widely used for the separation and removal.

It is sectional drawing of a cyclone type centrifuge. It is a top view of a cyclone centrifuge. FIG. 3 is a perspective view showing an electrode rod fixture. It is sectional drawing of a cyclone type centrifuge. It is a top view of a cyclone centrifuge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cyclone type centrifuge 2 Cyclone part 4 Liquid outflow passage 5 Liquid introduction passage

Claims (5)

A liquid containing fines is supplied from the liquid introduction passage to generate a vortex at a predetermined flow rate, and the fines are moved outward in a centrifugal state to discharge the fluid that has separated the fines from the liquid outflow passage, and the vortex is decelerated. Equipped with a cyclone section to settle the separated fines,
Provide a metal mesh for filtering the fines at the opening of the liquid outflow passage,
A cyclone centrifugal apparatus characterized by imparting the same charge as that of the fine substance to the metal mesh. The cyclone centrifugal apparatus according to claim 1, wherein an electrode rod is disposed at an axial center position of the cyclone portion, and the same charge as that of the fine material is applied to the electrode rod. The cyclone centrifugal apparatus according to claim 1 or 2, wherein a charge opposite to the charge of the fine substance is imparted to the cyclone unit. The cyclone centrifugal apparatus according to claim 3, wherein a punching metal is attached to an inner wall of the cyclone part. The cyclone centrifugal separator according to any one of claims 1 to 4, wherein the same charge as the charge of the fine object is applied to the metal mesh based on at least one of intermittent or pressure loss. apparatus.

Images