WO1994025169A1 - Electrostatic dust collector and apparatus for collecting mist having the electrostatic dust collector - Google Patents
Electrostatic dust collector and apparatus for collecting mist having the electrostatic dust collector Download PDFInfo
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- WO1994025169A1 WO1994025169A1 PCT/JP1994/000672 JP9400672W WO9425169A1 WO 1994025169 A1 WO1994025169 A1 WO 1994025169A1 JP 9400672 W JP9400672 W JP 9400672W WO 9425169 A1 WO9425169 A1 WO 9425169A1
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- electrode
- mist
- case
- electrostatic precipitator
- electrostatic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/04—Plant or installations having external electricity supply dry type
- B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
Definitions
- the present invention relates to an electrostatic precipitator for collecting mist, dust, and the like generated by scattering of a coolant during cutting in various machine tools such as a lathe and a cylindrical grinder. Further, the present invention relates to a mist collecting device provided with the electrostatic dust collecting device (Technical Background
- a mist collecting device for collecting a mist having a mechanical structure including a plurality of partition plates, a filter device, and the like is known.
- the length of the mist recovery device is reduced by the length of the partition plates and the filter device.
- the device becomes longer in the arrangement direction and the device itself becomes larger.
- FIG. 16 shows a basic configuration of a cylindrical electrostatic precipitator 91 as an example of a conventional electrostatic precipitator.
- This cylindrical electrostatic precipitator 91 has a cylindrical positive electrode (electrode) 92 charged to a negative electrode (one pole) and a needle-shaped discharge electrode 93 charged to a positive electrode (+ electrode) inside. It is composed by passing through. At this time, the mist introduced into the dust collecting electrode 92 is positively charged by the discharge electrode 93, adheres to the inner wall of the dust collecting electrode 92, and the mist is collected.
- a first object of the present invention is to provide an electrostatic precipitator capable of easily combining a plurality of dust collection units.
- a second object is to increase the amount of mist and the like collected at the dust collection electrode of the dust collection unit according to the present invention, and to improve the dust collection capability of the electrostatic precipitator.
- the electrostatic precipitator of the present invention is configured by bundling a plurality of precipitating units.
- Each dust collection unit includes a first electrode and a second electrode formed in a rectangular cylinder surrounding the first electrode.
- Each of the angular second electrodes has a side surface that allows mutual contact with the second electrodes of other units.
- An electrostatic precipitator is constructed by bundling a large number of precipitating units while bringing the side surfaces of the second electrode into contact with each other. Therefore, a desired dust collection capacity can be set by bundling a desired number of dust collection units.
- the outer contour of the first electrode is similar to the inner contour of the second electrode, and the outer surface of the first electrode and the inner surface of the second electrode are different from each other. It is desirable to arrange them in parallel with each other. Therefore, the distance between the outer surface of the first electrode and the inner surface of the second electrode is kept constant. For this reason, a uniform DC electric field is generated between the outer surface of the first electrode and the inner surface of the second electrode, and the mist introduced into the electrostatic precipitator along the uniform DC electric field. The fine particles are moved from the first electrode side to the second electrode side in a stable state, adhere to the inner wall surface of the second electrode, and are collected.
- FIG. 1 is a cross-sectional view showing a mist collecting device according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a side surface of the inner cylinder in the first embodiment.
- FIG. 3 is a plan view showing the shielding plate in the first embodiment.
- FIG. 4 is a plan view of the mist collection device shown in FIG. 1 in the first embodiment as viewed from above.
- FIG. 5 is a cross-sectional view showing the L-L diagram of FIG. 1 in the first embodiment.
- FIG. 6 is a sectional view showing the MM diagram of FIG. 1 in the first embodiment.
- FIG. 7 is a sectional view showing the electrostatic precipitator according to the first embodiment.
- FIG. 8 is a plan view showing the base and the positive electrode plate in the first embodiment.
- FIG. 9 is a perspective view showing a state where the square pipes are overlapped in the first embodiment
- FIG. 10 is a perspective view showing a mist recovery device provided with an electrostatic precipitator in the second embodiment.
- FIG. 11 is a cross-sectional view of the mist collecting device shown in FIG.
- FIG. 12 is a sectional view showing the inside of the second case in the second embodiment.
- FIG. 13A is a front view showing a pyroscreen in the second embodiment.
- FIG. 13 (b) is a side view showing a pyroscreen in the second embodiment.
- FIG. 14 is a sectional view showing a dust collection unit according to the third embodiment.
- FIG. 15 is a perspective view showing a dust collection unit in the third embodiment.
- FIG. 16 is a cross-sectional view showing a conventional electrostatic precipitator. BEST MODE FOR CARRYING OUT THE INVENTION
- Figure 1 is a cross-sectional view of the mist collection device, showing the internal structure.
- the main case 3 of the mist collection device is composed of a lower case 1 and an upper case 2.
- the lower case 1 is formed in a cylindrical shape whose upper part is open.
- a cylindrical suction port 4 for sucking air including mist is formed on the upper side surface of the lower case 1.
- a disk-shaped shielding plate 5 is rotatably supported by a shaft 6 at the inlet 4. The amount of rotation (that is, the inclination angle) of the shielding plate 5 is adjusted by a lever (not shown). The amount of air sucked into the inlet 4 is adjusted by the amount of rotation of the shielding plate 5.
- the bottom of the lower case 1 has a conical shape downward. An outlet 7 is formed at the center of the bottom.
- the drain tank (not shown) is connected to the discharge port 7, to recover the mist guided to the outlet 7 &
- the upper case 2 is disposed above the lower case 1.
- the planar shape of the upper case 2 has a substantially U-shape in which the portion provided on the suction port 4 side of the lower case 1 has a semicircular shape.
- the upper case 2 is provided with a discharge port 8 for discharging the air from which the mist has been collected, on the side opposite to the semicircular portion (the suction port 4 side of the lower case 1).
- a motor 9 as a rotation driving means is mounted on the upper part of the upper case 2.
- An output shaft of the motor 9 extends into the upper case 2, and a fan 10 is attached to the output shaft. The fan 10 is rotated by the motor 9, and sucks air including mist into the case 3 from the suction port 4.
- An inner cylinder 11 is provided concentrically with the lower case 1 in a main body case 3 composed of the lower case 1 and the upper case 2.
- the inner cylinder 11 has open ends on both the upper and lower sides.
- a flange portion 12 is formed in the inner cylinder 11.
- the flange portion 12 is sandwiched between the lower case 1 and the upper case 2 and is screwed with the bolt 13 so that the inner cylinder 11 is securely fixed to the lower case 1 and the upper case 2. It has been.
- the flange portion 12 extends into the inner cylinder 11.
- annular introduction passage through which air including mist sucked from the suction port 4 passes through the inner peripheral surface of the lower case 1 and the outer peripheral surface of the inner cylindrical body 11. 14 are formed.
- FIG. 2 shows the outer shape of the inner cylinder 11.
- a plurality of impellers 15 are fixed obliquely at equal intervals over the entire circumference.
- the air containing the mist sucked from the suction port 4 flows through the passage 14 while spiraling around the inner cylinder 11 by the impeller 15.
- a plurality of shielding plates 17 are fixed to the outer peripheral surface of the cylindrical body 11 in an upward and downward direction.
- Each shield plate 17 is an annular partition plate made of punched metal with perforated holes 16 shown in FIG.
- the air containing the mist swirled by the impeller 15 collides with the shield 17. At this time, the mist adheres to the shield 17 and liquefies on the shield 17 to form droplets.
- the droplets on the shield 17 are successively grown by absorbing mist adhering to the shield 17.
- the grown droplets eventually fall to the bottom of lower case 1 due to their own weight, It is led to the discharge port 7 and collected by a drain tank (not shown). Further, the mist not recovered by the shielding plate 17 is guided into the inner cylinder 11.
- an inner flange portion 12 a is formed inside the inner cylinder 11 at the same height as the flange portion 12.
- An annular seat plate 18 is fixed to the inner flange portion 12a.
- a bearing 19 is provided on the inner peripheral surface of the seat plate 18, and the cylindrical body 20 is rotatably supported by the bearing 19.
- the cylindrical body 20 has a hollow shape with both upper and lower sides opened, and a sleeve 21 is provided at the center thereof.
- a plurality of blades 22 are fixed between the inner peripheral surface of the cylindrical body 20 and the sleeve 21. The blades 22 are provided with rotational force by the upward airflow generated by the fan 10. Then, with the rotation of the blade 22, the cylinder 20 rotates about the sleeve 21.
- a ring 23 is fixed to the outer peripheral surface of the lower part of the cylindrical body 20.
- a filter device 24 is fixed to the ring 23. The filter device 24 rotates together with the cylinder 20 via the ring 23.
- the filter device 24 includes an external filter device 25 and an internal filter device 26 disposed inside the external filter device 25.
- the external filter device 25 and the internal filter device 26 are fixed to the ring 23, respectively.
- the external filter device 25 has a hollow external cylindrical body 25a that is open on both upper and lower sides.
- the outer cylindrical body 25a is formed of a panning metal having a plurality of through holes formed on the entire surface.
- a plurality of guide plates 25b are radially provided at equal intervals on the outer peripheral surface of the outer cylindrical body 25a.
- the guide plate 25b is made of punching metal and extends in the thrust direction.
- a sponge filter 25 made of a porous material and having a hygroscopic property is provided between the guide plates 25b.
- the internal filter device 26 includes a hollow internal cylinder 26a having both ends opened.
- the inner cylinder 26a is formed by punching metal:
- a sponge filter 26b is attached to the entire outer periphery of the cylindrical body 26a.
- a guide plate 26c made of a panning metal extending in the thrust direction is fixed to the inner peripheral surface of the inner cylindrical body 26a.
- a disk 26d is fixed to the lower part of the inner cylindrical body 26a, the sponge filter 26b, and the guide plate 26c. Therefore, the internal filter device 26 does not inhale mist or the like from the lower part thereof or leak the liquid in the device 26.
- air containing mist is introduced between the outer peripheral surface of the filter device 24 (the outer peripheral surface of the sponge filter 25 c of the external filter device 25) and the inner peripheral surface of the inner cylinder 11.
- An annular introduction gap 27 is formed. That is, in the rotating state of the filter device 24, the mist introduced into the introduction gap 27 from the lower portion of the inner cylinder 11 is removed by the sponge filter 25c of the external filter device 25. Attached to the outer peripheral surface. At this time, relatively large mist particles or liquid droplets derived from the mist adhering to the outer peripheral surface of the sponge filter 25c are blown off by centrifugal force due to the rotation, and the inner peripheral surface of the inner cylinder 11 is rotated. Adheres to the surface.
- the droplets attached to the inner peripheral surface grow one after another while absorbing the mist particles supplied to the inner peripheral surface. Eventually, the grown droplet falls by its own weight and is guided to the outlet 7. Further, the mist which is relatively small and has not been blown off to the inner peripheral surface of the inner cylinder 11 is collected by being absorbed by the sponge filter 25c. Further, the mist not filtered by the sponge filter 25 c is led to the internal filter device 26. Then, the mist is attached to and absorbed by the sponge filter 26b of the internal filter device 26, so that the mist is collected. In this manner, the air introduced into the internal filter device 26 is guided to the inner peripheral surface of the internal filter device 26. The air is guided upward by the suction force of the fan 10 while being guided toward the center of the device by the guide plate 26c. The air is discharged from above the inner cylinder 11 to the outside of the inner cylinder 11, and is guided to the discharge port 8.
- the discharge port 8 is provided with an eliminator 28.
- the eliminator 28 forms an open suction port 29 in the upper case 2 formed at one end thereof, and is opened to the outside of the upper case 2 formed at the other end. Exhaust port 30.
- this eliminator 28 A bent plate 31 (a two-dot chain line in FIG. 5) composed of a plurality of punching metals bent in a plurality of places in a zigzag manner is arranged in parallel with each other.
- the bent plate 31 is divided into two groups at the center of the exhaust hole 30.
- the upper group shown in Fig. 5 discharges air and the like in the X direction, and the lower group discharges air and the like in the Y direction.
- the air sucked from the suction port 29 of the eliminator 28 is directed to the bending direction of the bending plate 31 while colliding with the bending plate 31.
- the mist slightly contained in the air collides and adheres to the bent plate 31, and is collected by the eliminator 28.
- the air from which the mist is collected is reliably discharged in a direction in which the mist is diffused to the outside of the upper case 2 by the bending direction of the bent plate 31. .
- vapor (steam) that is difficult to collect with mechanical devices such as the shield plate 17, the filter device 2, and the eliminator 28 is used. And smoke are still included.
- an electrostatic precipitator 32 for collecting these vapors and smoke contained in the air is connected to the discharge port 8 (the exhaust port 30 of the eliminator 28). It has been done.
- the outer periphery of the electrostatic precipitator 32 is formed by a square case 33.
- the case 3 3 has a suction port 3 4 connected to the discharge port 8, and a discharge port 3 for discharging clean air purified by the dust collector 3 2 at an upper portion thereof. 5 is formed.
- the bottom of the electrostatic precipitator 32 has a conical shape downward.
- An outlet 36 for discharging the vapor or smoke absorbed by the electrostatic precipitator 32 is formed at the center of the bottom.
- a drain tank (not shown) is connected to the discharge port 36 to collect vapor, smoke, and the like guided to the discharge port 36.
- a rectangular parallelepiped frame 38 formed in the hollow of the electrostatic precipitator 37 is provided inside the case 33.
- the frame 38 has a flange portion 38a formed at an upper portion thereof, and the flange portion 38a is fixed to the case 33.
- the electrostatic precipitator 37 is disposed vertically.
- the inner peripheral surface of the case 33 and the outer peripheral surface of the frame 38 form an introduction passage 39 for introducing air including vapor or smoke. Then, the air including vapor or smoke introduced into the introduction passage 39 is supplied to the lower end of the frame 38. More and more are being introduced.
- a base 40 made of a base is fixed to the inside of the upper portion of the frame 38.
- the base 40 has a plurality of square through holes 40a formed at regular intervals in the vertical and horizontal directions.
- a total of 16 through-holes 40a are arranged in four rows each in the vertical and horizontal directions, and as a result, the base 40 has a lattice shape.
- a circular through hole 4 Ob is formed at each intersection of the lattice frame of the base 40. Therefore, the base 40 has nine circular through holes 40b in addition to the 16 through holes 40a.
- a positive electrode plate 41 made of a conductor such as a metal is fixed on the substrate 40.
- the positive electrode plate 41 is charged to a positive polarity by a power source (not shown).
- the positive electrode plate 41 has, at positions corresponding to the through-holes 40a and through-holes 40b formed in the base plate 40, through-holes having the same shape as the through-holes 40a and through-holes 40b.
- the hole 41a and the through hole 41b are formed.
- each of the electrode pins 42 is a cylindrical electrode pin having a diameter of about 5 mm to 8 mm and formed of a conductor such as a metal, and functions as a discharge electrode.
- Each pin 4 2 has its base connected to the positive electrode plate 4 1 and is charged to the positive electrode.
- the tip of each pin 42 is formed in a pointed state. In the present embodiment, the tip angle at the tip portion is set to 60 ° to 90 °.
- the electrostatic precipitator 37 has a pipe assembly in which a plurality of square pipes 43 are combined.
- Each of the square pipes 43 is provided with a positive electrode pin 42.
- the inside and outside contours of the square pipe 43 are formed in a square shape.
- the conductor is made of an aluminum material or the like, and the inside contour of the square cross section has a dimension of 30 mm and a longitudinal length of 10 Omn!
- a total of 9 square pipes 43 of â 150 mm are used by stacking them in three stages. That is, the square pipes 43 are arranged in a substantially square shape.
- These square pipes 43 are fixed in the frame body 38 by guide members 44 formed of an insulating material.
- the tip of the positive electrode pin 42 is slightly (about 3 mm to 5 mm) disposed so as to protrude from the lower part of the square pipe 43. I have. Further, a power supply (not shown) is connected to the square pipe 43, and the electrode is charged to a negative polarity by the electrode.
- the dust collecting unit U is formed by one square pipe 43 and the positive electrode pin 42.
- the amount of mist collected in the dust collecting unit U (hereinafter referred to as dust collecting capacity) is proportional to the electric field capacity determined by the dimensions of the square pipe 43 and the like. Therefore, the total dust collection capacity of the electrostatic dust collector 37 is set by the number of the above-mentioned dust collection units U.
- the number of used dust collecting units U is set in the present apparatus 37, and each of these square pipes 43 is set according to the used number.
- Each of the outer surfaces 43a is successively brought into contact with each other and superimposed.
- the positive electrode pins 42 are respectively passed through the corresponding pipes 43.
- the electrostatic dust collection device 37 having a desired dust collection ability is formed.
- the suction port 4 of the mist collecting device is connected to the cutting machine S side, and the fan 10 is rotated by the motor 9. Due to the upward airflow caused by the suction force generated by the rotation of the fan 10, the blade 22 rotates around the sleeve 21.
- the filter device 24 rotates together with the cylinder 20.
- air containing mist, vapor, smoke, and the like generated in the cutting machine S is supplied from the suction passage 4 by the suction force generated by the fan 10 to the introduction passage. Introduced to 14.
- the air is swirled by the impeller 15 provided in the introduction passage 14 and is guided downward.
- the swirling air collides with the shield 17 and mist particles adhere.
- the attached mist particles successively grow into droplets by absorbing the mist particles attached to the shielding plate 17.
- the grown droplets fall on the bottom surface of the lower case 1 by their own weight, are guided to the discharge port 7, and are collected by a drain tank (not shown). Further, the mist not collected by the shielding plate 17 is led into the inner cylinder 11 together with air.
- the mist guided into the inner cylinder 11 is introduced into the introduction gap 27 and is absorbed by the filter device 24.
- the mist adheres to the outer peripheral surface of the sponge filter 25c of the external filter device 25.
- the relatively large mist particles or droplets adhering to the sponge filter 25 c are successively absorbed, and the large mist particles or droplets are adsorbed to the external filter device 25. It is blown off by centrifugal force due to rotation.
- the blown droplets adhere to the inner peripheral surface of the inner cylinder 11.
- the droplets and the like that have adhered to the inner peripheral surface grow one after another while absorbing the mist that adheres to the inner peripheral surface, and eventually fall by their own weight and are guided to the discharge port 7.
- mist particles which are relatively small and have not been blown off to the inner peripheral surface of the inner cylinder 11 are collected by being absorbed by the sponge filter 25c. Further, the mist not collected by the sponge filter 25c is guided to the internal filter device 26. Then, the mist is filtered by being attached and absorbed by the mist force 26 b of the sponge filter 26 b of the internal filter device 26. Thus, the air from which the mist has been collected is guided upward by the suction force of the fan 10 while being guided toward the center by the guide plate 26c. Then, the air is discharged from above the inner cylinder 11 to the outside of the inner cylinder, and is guided to the eliminator 28 attached to the discharge port 8. As shown in FIGS.
- the air introduced into the electrostatic precipitator 32 is guided downward through the introduction passage 39, and from the lower end of the electrostatic precipitator 37, the electrostatic precipitator 3 7 Guided inside. Then, the air is guided upward from below in the square pipe 43.
- mist, vapor, smoke, and the like that are not collected by the mist collection device are positively charged and adhere to the square pipe 43.
- the amount of mist, vapor, smoke, and the like adhering to the square pipe 43 becomes a certain amount or more, for example, when a mechanical impact is applied by a not shown stapling device, the adhering mist The vapor, smoke, etc. are separated from the wall surface of each pipe 43, guided downward by its own weight, and guided to the discharge port 36.
- each outer surface 43 a of the square pipe 43 is formed.
- the dust collection units U can be bound together.
- the electrostatic precipitating device 37 by sequentially superposing the desired number of the dust collecting units U, the number of the used dust collecting units U is appropriately changed, and the desired dust collecting unit U is changed.
- An electrostatic precipitator 37 having a capability can be formed.
- the dust can be collected by a mechanical device. It is possible to preferably recover vapor, smoke, and the like that are difficult to use without consuming extra power.
- FIGS. 10 and 11 show a mist collecting device provided with an electrostatic precipitator.
- a first rectangular parallelepiped case 51 made of sheet metal or the like is provided on the front of the mist collection device.
- a circular inlet 52 is provided on the front surface of the first case 51.
- a blower 53 is provided in the first case 51, and a suction portion 54 formed on the entire surface of the process 53 is connected to the suction port 52.
- a discharge port 55 is formed on the lower surface of the blower 53, and the discharge port 55 is connected to an introduction chamber 56 formed on the lower surface of the first case 51.
- a second rectangular parallelepiped case 57 is connected to the introduction chamber 56. As shown in FIG. 12, a suction port 58 is formed on the introduction chamber 56 side of the second case 57. Then, the air containing the mist introduced into the introduction chamber 56 is introduced into the second case 57 from the suction port 58. Further, in the second case 57, a plurality of partition plates 59 are alternately attached between an inner wall in which the suction port 58 is formed and an inner wall facing the inner wall. The leading end of each partition plate 59 forms an opening 60 without abutting against the opposing surfaces. The partition plate 59 and the inner wall of the second case 57 form an introduction passage 61 for introducing air containing mist.
- the introduction passage 61 is formed so as to meander the second case 57.
- the introduction passage 61 has a rear end 62 on the side opposite to the side where the suction port 58 of the introduction passage 61 is formed.
- a pyro screen 63 is attached to the opening 60 in a direction perpendicular to the partition plate 59.
- the pyroscreen 63 has a slit-like shape on the surface 64 facing the direction in which the mist containing air proceeds (arrow in the figure).
- the cut 6 5 is formed.
- the right side surface is pressed against the cut 65 so as to be depressed so that the hole 66 is formed in a direction perpendicular to the direction in which the mist containing the air proceeds.
- the air containing the mist introduced from the suction port 58 is meandering along the introduction passage 61 and is introduced to the rear end 62. At this time, the mist is recovered by colliding with the pyroscreen 63 and the mist passes through the hole 66. To be introduced into the rear end 62. A discharge port 67 is formed at an upper portion of the rear end 62.
- a third case 68 is fixed to the upper part of the second case 57.
- the lower part of the third case 68 is formed with a suction port 69 communicating with the discharge hole 67.
- the air containing the mist introduced into the rear end 62 is introduced into the third case 68 via the outlet 67 and the inlet 69.
- a rotating shaft 70 rotatably supported is provided.
- E rotational shaft 7 0 sponge filter 71 made of porous sponge or the like as a disk-shaped filter device in is fixed (three in this embodiment) a plurality addition, the rotation of this
- the front end of the shaft 70 protrudes into the first case 51, and a pulley 72 is attached thereto.
- a motor storage box 73 is provided on the upper surface of the first case 51, and a drive motor 74 is provided in the box 73.
- a bulge 76 is attached to a drive shaft 75 of the drive motor 74, and the bulge 76 and the pulley 72 are connected by a belt 77.
- the drive motor 74 rotates the sponge filter 71 with the rotation axis â 0 as the center of rotation. Further, a discharge port 78 is formed at the upper part of the third case 68, and a filter 79 made of a porous material or the like is sandwiched between the wire ports 80 at the discharge port 78. It is arranged in.
- the air containing the mist introduced into the third case 68 is absorbed by the sponge filter 71 and the filter 79 on the discharge port 78 side and the wire netting member 80 are not absorbed. Absorbed by
- An electrostatic precipitator 81 is disposed above the third case 68.
- a suction port 82 is formed at a position corresponding to the discharge port 78 of the third case 68.
- the air containing the mist discharged from the discharge port 78 is introduced into the electrostatic precipitator 81 from the suction port 82.
- an electrostatic precipitator 37 is disposed horizontally.
- a predetermined number of electrostatic units U are arranged in the electrostatic dust collector 37 in order to obtain an optimum dust collecting ability.
- an optimum dust collecting capability is obtained.
- a discharge port 83 is formed at the upper part of the electrostatic precipitator 81, and the discharge port 83 is formed. Clean air from which mist etc. is collected is released to the atmosphere.
- the air containing mist is sucked into the blower 53 from the suction port 52, and is introduced into the introduction chamber 56 through the discharge port 55. Then, the air containing the mist introduced into the introduction chamber 56 is introduced into the second case 57 from the suction port 58. As shown in FIG. 11, the air containing the mist introduced from the suction port 58 is introduced into the rear end 62 while meandering along the introduction passage 61. At this time, the mist is collected by colliding with the pyroscreen 63 and is introduced into the rear end 62 through the hole 66.
- the air introduced into the rear end 62 is introduced into the third case 68.
- the air containing the mist introduced into the third case 68 is absorbed by the rotating sponge filter 71, and the filter 79 on the discharge port 78 side and the wire mesh member 80 Absorbed by
- an air containing a mist is introduced into the electrostatic precipitator 81 from the outlet 78 of the third case 68.
- the air containing the mist is guided into the electrostatic precipitator 37 from the left side of the electrostatic precipitator 37 (see Fig. 11).
- the electrostatic dust collector 37 is installed horizontally, so that the The collection device can be configured as a compact.
- the positive electrode pin 85 provided on the dust collection unit U of the electrostatic precipitator 37 has a square outer contour. and that c ie, formed in the same shape, means that form similar inner contour of the square pipe 4 3 9 covering the periphery of the positive pole electrode pins 8 5.
- the positive electrode pin 85 has a square of about 5 mm to 8 mm forming the outer cross section.
- the outer surface 85 a of the positive electrode pin 85 and the inner surface 43 b of the square pipe 43 opposed to each other are arranged in parallel with each other, and the positive electrode pin 85 The distance between the outer surface of the rectangular pipe 43 and the inner surface of the square pipe 43 is maintained at a constant distance 5.
- the positive electrode pin 85 has its base fixed to the positive electrode plate 41, so that it is charged to the positive electrode. Further, the positive electrode pin 85 is formed in a state where the tip is sharpened in a conical shape. The tip angle at the tip is 60 ° to 90 °. In addition to this, this tip protrudes from the lower end of the square pipe 43.
- a strong DC electric field is formed between the positive electrode pin 85 and the negatively charged square pipe 43.
- the distance between the outer surface 85a of the positive electrode pin 85 and the inner surface 43b of the square pipe 43 is the same as that of the positive electrode plate 41 having a circular cross section. It does not become wider as it goes from the center of each side to the corner, and is kept at a constant interval 5. Therefore, this DC electric field is not weakened from the center of the positive electrode pin 85 to the corner, and the outer surface 85 a of the positive electrode pin 85 and the inner surface 43 of the square pipe 43 are not weakened.
- a uniform and strong DC electric field is generated over the entire length h of each side of the positive electrode pin 85, and a positive ion from the positive electrode pin 85 toward the square pipe 43 is formed.
- showering occurs.
- fine particles such as mist, vapor and smoke are positively charged by colliding with the positive ion, and the square pipe 4 is uniformly charged by the strong uniform DC electric field.
- Moved to 3. Therefore, in a strong and stable state, mist, vapor, smoke and the like can be adhered to the square pipe 43 and collected, and the dust collecting ability can be improved.
- the interval between a part of the corner of the square pipe 43 and a part of the corner of the positive electrode pin 85 is â 2.5.
- the interval S is set to an optimal interval â 5 max at which the dust collection ability determined by experiments or the like can be maximized. Then, since the inner surface 4 3 b of the square pipe 43 is parallel to the outer surface 85 a of the positive electrode pin 85, the length h of each side of the positive electrode pin 85 extends over the entire length h. However, the optimum interval for maximizing the capacity is maintained at â 5 max. Therefore, as compared with the case where the cross section is circular, the range in which mist, paper, smoke, and the like can be efficiently collected with the maximum capacity can be widened, and the dust collecting ability can be further improved.
- the electrostatic precipitator 37 was constructed using nine dust collection units U, but eight or less or ten or more dust collection units U were used depending on the mist collection device to be installed.
- the dust collection unit U may be configured by using the above.
- the dust collecting capacity of the electrostatic precipitator U is appropriately set according to the number of the used dust collecting units U.
- these square pipes 43 do not need to be particularly stacked in a substantially square shape, but may be stacked in an appropriate shape such as a substantially rectangular shape.
- the dimensions of the square pipe 43 in the dust collection unit U may be appropriately changed to change the electric capacity.
- square pipe 43 may be provided with a plating to enhance conductivity.
- an insulating layer may be formed on the positive electrode plate 41, the positive electrode pins 42, 85, and the like.
- the discharge electrode side of the positive electrode plate 41 and the positive electrode pins 42, 85, etc. It is possible to prevent electric leakage between the dust collecting electrode side of the step 43 and the like, thereby preventing a reduction in dust collecting ability.
- the inner shape, outer shape and inner shape of the square pipe 43 as the dust collecting electrode may be formed of a polygon such as a regular triangle, a rhombus, a rectangle, a regular hexagon.
- the outer cross-sectional shape of the positive electrode pin 85 as the discharge electrode may be formed as a polygon having the same shape as the inner cross-sectional shape of the square pipe 43.
- the tip of the positive electrode pin 42 may be configured to be flush with the square pipe 43.
- a male screw may be formed on the positive electrode pin 42.
- the hole portion 66 of the pyroscreen 63 is opened downward, even if the pyroscreen 63 is arranged so as to open upward, to the side, etc. Good.
- the pyroscreen 63 is formed so that the opening direction of the hole portion 66 of each pyroscreen 63 is appropriately opened in each direction such as upward, downward, and side. It may be arranged in the case 57 of 2.
- electrostatic precipitator 37 may be composed of only the precipitating unit U alone.
- An electrostatic precipitator according to the present invention and a mist collecting apparatus provided with the electrostatic precipitator can collect mist, vapor, steam, and the like generated from various machine tools such as a lathe. it can. Furthermore, mist, vapor, steam, etc. generated in various factories can be collected.
Landscapes
- Electrostatic Separation (AREA)
Description
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Claims
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9978193 | 1993-04-26 | ||
JP5/99781 | 1993-04-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994025169A1 true WO1994025169A1 (en) | 1994-11-10 |
Family
ID=14256490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/000672 WO1994025169A1 (en) | 1993-04-26 | 1994-04-22 | Electrostatic dust collector and apparatus for collecting mist having the electrostatic dust collector |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1994025169A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102941158A (zh) * | 2012-12-05 | 2013-02-27 | å±±äžå€§åŠ | äžç§åæ§é³ææ¿è¡šé¢æ°Žèåžçœ®å·¥èºåè£ çœ® |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52103774A (en) * | 1976-02-27 | 1977-08-31 | Furukawa Kogyo Kk | Dust collecting electrode for electric dust collectors |
JPS5635243Y2 (ja) * | 1979-04-24 | 1981-08-19 | ||
JPH034342A (ja) * | 1989-05-31 | 1991-01-10 | Toshiba Corp | ã¡ã¢ãªå¶åŸ¡è£ 眮 |
JPH038343Y2 (ja) * | 1986-01-27 | 1991-02-28 |
-
1994
- 1994-04-22 WO PCT/JP1994/000672 patent/WO1994025169A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52103774A (en) * | 1976-02-27 | 1977-08-31 | Furukawa Kogyo Kk | Dust collecting electrode for electric dust collectors |
JPS5635243Y2 (ja) * | 1979-04-24 | 1981-08-19 | ||
JPH038343Y2 (ja) * | 1986-01-27 | 1991-02-28 | ||
JPH034342A (ja) * | 1989-05-31 | 1991-01-10 | Toshiba Corp | ã¡ã¢ãªå¶åŸ¡è£ 眮 |
Non-Patent Citations (3)
Title |
---|
Microfilm of the Specification and Drawings Annexed to the Written Application of Japanese Utility Model Application No. 10868/1982, (Laid-Open No. 116059/1983), (TOSHIHARU TAKEBAYASHI), 8 August 1983. * |
Microfilm of the Specification and Drawings Annexed to the Written Application of Japanese Utility Model Application No. 49852/1982, (Laid-Open No. 3948/1983), (TAIZAN NAGAOKA), 11 January 1983. * |
Microfilm of the Specification and Drawings Annexed to the Written Application of Japanese Utility Model Application No. 71291/1985, (Laid-Open No. 187254/1986), (DAIKIN INDUSTRIES, LTD.), 21 November 1986. * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102941158A (zh) * | 2012-12-05 | 2013-02-27 | å±±äžå€§åŠ | äžç§åæ§é³ææ¿è¡šé¢æ°Žèåžçœ®å·¥èºåè£ çœ® |
CN102941158B (zh) * | 2012-12-05 | 2014-02-26 | å±±äžå€§åŠ | äžç§åæ§é³ææ¿è¡šé¢æ°Žèåžçœ®å·¥èºåè£ çœ® |
WO2014085949A1 (zh) * | 2012-12-05 | 2014-06-12 | å±±äžå€§åŠ | äžç§åæ§é³ææ¿è¡šé¢æ°Žèåžçœ®å·¥èºåè£ çœ® |
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