JPH0124526B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oil mist removal device for removing oil mist from oil mist entrained gas.

Conventionally, in order to remove oil mist from gas, the gas is passed through a filter, separated by centrifugation, or electrostatically separated and removed by applying an electric charge to the oil mist. was. However, the filter becomes clogged with oil mist and must be cleaned frequently, making it difficult to remove oil mist stably over a long period of time. Further, centrifugation cannot separate oil mist having a fine particle size. Furthermore, when separating and removing oil mist electrostatically, the oil mist is adsorbed to the electrodes, so the electrodes must be cleaned frequently, making maintenance work troublesome.

The present invention solves the above technical problems and provides an oil mist removal device that can efficiently remove oil mist over a wide particle size range and does not require maintenance work over a long period of time. The purpose is to

The present invention comprises: a flat rotating disk 4 rotatable around an axis; a driving means 2 for rotationally driving the rotating disk 4 behind the rotating disk 4; and a peripheral portion of the rotating disk 4. An annular passage 26 having uniform radial intervals in the circumferential direction is formed to concentrically surround the rotating disk 4, and gas accompanied by oil mist is introduced in front of the rotating disk 4. a casing 8 comprising an outlet 19 and an outlet 7 connected to the annular passage 26 on the rear side of the rotating disk 4; a means 32 for introducing gas accompanied by oil mist into the inlet 19; A water supply pipe 30 is provided for supplying water from the front toward the center of the rotating disk 4 on the same straight line as the axis of the rotating disk 4, and the water is scattered radially outward into the annular passage 26. This oil mist removal device is characterized in that a water film is formed by water droplets, and oil mist collides with the water droplets of this water film.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken from the cutting plane line in FIG. 1, and FIG. 3 is a sectional view taken from the cutting plane line in FIG. 1. FIG. Gas containing oil mist is introduced into the oil mist removing device 1 by the action of a flat rotating disk 4 that is rotationally driven by a motor 2, as indicated by a broken line arrow 5. The rotating disk 4 includes a plurality of rotating blades 3. The motor 2 is arranged behind the rotating disk 4 (to the right in FIG. 1). An annular passage 26 is formed between the peripheral edge of the rotating disk 4 and the inner peripheral surface of the casing 8,
The annular passage 26 has uniform radial intervals (constant values) in the circumferential direction. The casing 8 concentrically surrounds the rotating disk 4. A water supply pipe 30, which will be described later, supplies water toward the center of the rotating disk 4 on the same straight line as the axis of the rotating disk 4. Water is supplied to the center of the rotating disk 4, and the water is blown outward in the radial direction of the rotating disk 4 by centrifugal force at a relatively high speed, for example, 80 m/sec.
A water film is formed on the outer periphery of the rotating disk 4 over the entire periphery. The gas containing the oil mist flows through the water film, whereby the oil mist impinges on water droplets and is separated. The gas from which the oil mist has been removed is discharged from the discharge port 7 as indicated by the dashed arrow 6.

The casing 8 of the oil mist removal device 1 includes an inner cylinder 9 that extends in the horizontal direction, an outer cylinder 10 that concentrically surrounds the inner cylinder 9, and a disc-shaped casing that commonly closes one end of the inner cylinder 9 and the outer cylinder 10. An annular end plate 13 that closes the annular gas flow path 12 between the inner cylinder 9 and the outer cylinder 10 at the other end of the end plate 11 , the inner cylinder 9 and the outer cylinder 10 , and the inner cylinder 9 and the end plate 13 in the end plate 11 . It includes a cover body 15 which is basically cylindrical with a bottom and is flanged to the end plate 11 to form a separation chamber 14 between the outer cylinder 10 and the end plate 11 on the opposite side.

A cylindrical body 16 that extends radially outward and forms the discharge port 7 is connected to the upper part of the outer cylinder 10 . End plate 11
A plurality of (four in the figure) through holes 17 that communicate the separation chamber 14 and the gas flow path 12 are bored at equal intervals in the circumferential direction. The end of the cover body 15 opposite to the end plate 11 includes a conical part 18a whose diameter becomes smaller toward the outside, and a right cylindrical part 18b connected to the small diameter end of the conical part 18a. Connecting cylinders 18 forming an opening 19 are concentrically connected. Such a casing 8 is supported by a flat base 22 by a pair of legs 20 and 21 that are fixed to the lower part of the outer cylinder 10 and extend downward and parallel to each other.

A motor 2 is inserted concentrically into the inner cylinder 9, and the motor 2 is fixed to the end plate 11 with its output shaft 23 protruding into the separation chamber 14 through a hole 24 formed in the center of the end plate 11. Ru. Separation chamber 14 of this output shaft 23
The rotary disk 4 is concentrically fixed to the end facing the inlet 14 by a conical fixing member 25 whose diameter becomes smaller toward the introduction port 14 . By storing the rotating disk 4 in the separation chamber 14 in this manner, an annular passage 26 is formed between the inner surface of the cover body 15 of the casing 8 and the peripheral edge of the rotating disk 4. Ru.

A surface 27 of the rotating disk 4 facing the inlet 19 has a plurality of holes (6
2) rotating blades 3 are fixed at equal intervals in the circumferential direction. In these rotating blades 3, a surface 2 of the rotating disk 4 is formed at the inner end along the radial direction of the rotating disk 4 as it goes outward along the radial direction.
An inclined portion 28 is formed which is inclined away from 7. By forming this inclined portion 28,
During the rotational movement of the rotary disk 4, a function is generated that sucks gas through the inlet 19 and blows the gas outward in the radial direction as shown by the broken line arrow 29. A plurality of baffle plates 34 projecting radially inward are provided on the inner peripheral surface of the cover body 15 at an angle with the circumferential direction of the cover body 15 .

A water supply pipe 30 for supplying water to the center of the surface 27 of the rotating disk 4 passes airtightly through the right cylindrical portion 18b of the connecting cylinder 18, and has one end 30a.
are bent so that they are arranged opposite to the center of the surface 27. The outer end 30b of the water supply pipe 30 is connected to a water supply source (not shown) via a conduit 31 indicated by a two-dot chain line. In addition, since negative pressure is generated near one end 30a of the water supply pipe 30 by the suction action of the rotary blade 3, the water supply pressure of the water supply source may be relatively small, and a water supply nozzle is provided at the one end 30a. There's no need.

Note that a conduit 32 indicated by a two-dot chain line is connected to the right cylindrical portion 18a of the connecting cylinder 18.
2 is connected to a gas discharge source (not shown) containing oil mist.

A drain pipe 35 equipped with an on-off valve 33 is connected to the lower part of the end plate 13, and the water collected in the lower part of the gas passage 12 is discharged from the drain pipe 35.

Oil mist removal device 1 configured in this way
When the motor 2 is started, the rotating disk 4 starts rotating around the axis, and accordingly, gas containing oil mist is sucked into the separation chamber 14 as shown by the broken line arrow 5. At the same time, the flow direction of the gas is changed radially outward as shown by a broken line arrow 29, and is discharged from the outlet 7 through the passage 26, the through hole 17, and the gas flow path 12.

On the other hand, when water supply from a water supply source (not shown) is started, water flowing out from one end 30a of the water supply pipe 30 is directed toward the surface of the rotating disk 4 as shown by the solid line arrow 36.
7 in the radial direction due to centrifugal force. Moreover, the water that has reached the peripheral edge of the rotating disk 4 is blown away in the radial direction, thereby causing the passage 26
, a water film is formed over the entire circumference in substantially the same plane as the rotating disk 4.

When the gas containing oil mist flows through the water film in the passage 26, the oil mist collides with water droplets and is separated into a wide range of particle sizes. Moreover, at this time, the scattering speed of the water droplets is selected to be relatively high, for example, 80 m/sec, so that the oil mist collides with the high-speed water droplets and is efficiently separated. The diameter of the rotating disk 4 and the rotational speed of the motor 2 are selected to such values that water droplets are scattered at a high speed, as described above. Note that an efficient value for the scattering speed of water droplets may be selected depending on the particle size distribution and type of oil mist.

The water that has collided with the oil mist reaches the inner circumferential surface of the cover body 15 and moves along the inner circumferential surface in the rotational direction of the rotary disk 4. At this time, since the baffle plate 34 is protruded from the inner surface of the cover body 15, the water collides with the baffle plate 34 and is returned to the inside of the cover body 15 in the radial direction. Therefore, water that has once been scattered from the rotating disk 4 is brought to the center of the rotating disk 4, and is again scattered radially outward by centrifugal force. Therefore, the water is recycled and the amount of water supplied from the water supply pipe 30 is relatively small. Moreover, water supply pipe 30
Since there is no nozzle installed in the tank, there is no chance of the nozzle becoming clogged, and it is also possible to obtain a water droplet diameter that is effective for removing oil mist.

The water accumulated on the inner surface of the cover body 15 reaches the gas flow path 12 through the through hole 17 and is discharged from the drain pipe 35 by opening the on-off valve 33. On the other hand, the gas from which the oil mist has been separated passes through the gas passage 12 from the through hole 17 and is discharged from the discharge port 7. If the discharge port 7 is splashed with water, the discharge port 7 may be filled with a filler to remove the water spray.

In the embodiment described above, the rotary disk 4 is configured to rotate around a substantially horizontal axis, but in another embodiment of the present invention, the rotary disk 4 is driven to rotate around a substantially vertical axis. It's okay. Further, the rotating blade 3 may be formed of a net-like body to promote water dispersion. Furthermore, the rotating blade 3 may be omitted, and in this case, gas containing oil mist or the like may be fed through the pipe 32 using a forced blower or the like.

As described above, according to the present invention, the gas containing oil mist is made to flow through the water film formed by the water droplets flying at a relatively high speed, so that the water droplets collide with the oil mist and are efficiently dispersed. removed.
Furthermore, by appropriately discharging the water after removing the oil mist, continuous stable motion can be achieved over a long period of time, and there is no need for frequent maintenance work as in the prior art.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, FIG. 2 is a cross-sectional view taken from the cutting plane line in FIG. 1, and FIG.
The figure is a sectional view taken along the cutting plane line - in FIG. 1. 1...Oil mist removal device, 2...Motor,
3... Rotating vane, 4... Rotating disk, 8... Casing, 19... Inlet, 26... Passage, 27...
surface.

Claims (1)

[Claims] 1. A flat rotating disk 4 that is rotatable around an axis.
, a driving means 2 for rotationally driving the rotating disk 4 behind the rotating disk 4, and an annular shape in which the radial interval between the circumferential edge of the rotating disk 4 is uniform in the circumferential direction. A passage 26 is formed to concentrically surround the rotary disk 4, an inlet 19 for gas accompanied by oil mist is provided at the front of the rotary disk 4, and an annular passage 26 is formed at the rear of the rotary disk 4. a casing 8 having an outlet 7 connected to the inlet 7; a means 32 for introducing gas accompanied by oil mist into the inlet 19; a water supply pipe 30 for supplying water on the same line as the axis of the annular passage 26, a water film is formed by water droplets scattered radially outward in the annular passage 26, and oil mist is added to the water droplets of this water film. An oil mist removal device characterized by collision.