US2765912A

US2765912A - Magnetic liquid separator

Info

Publication number: US2765912A
Application number: US330751A
Authority: US
Inventors: Ronald C Hoff
Original assignee: Eriez Manufacturing Co
Current assignee: Eriez Manufacturing Co
Priority date: 1953-01-12
Filing date: 1953-01-12
Publication date: 1956-10-09
Anticipated expiration: 1973-10-09

Description

Oct. 9, 1956 R. c. HOFF 2,765,912

MAGNETIC LIQUID SEPARATOR Filed Jan. 12, 1953 2 Sheets-Sheet 1.

lLUlllJlLU\lLUlLU 0) 3nventor RONALD c. HOFF (Ittorneg Oct. 9, 1956 R. c. HOFF MAGNETIC LIQUID SEPARATOR 2 Sheets-Shae Filed Jan. 12, 1953 Enventor R ONALD C. HOFF Hg 6% 22M attorney MAGNETIC LIQUID SEPARATOR Ronald C. Hoff, Erie, Pa., assignor to Eriez Manufacturing Company, Erie, Pa., a corporation of Pennsylvania Application January 12, 1953, Serial No. 330,751 11 Claims. (Cl. 2101.59

This invention relates to separators and more particularly to magnetic separators for removing iron oxides and iron particles from pipe lines carrying muck emulsion, water, gasoline, kerosene, diesel fuel, and other oils and other liquids.

In muck emulsions containing a small percentage of iron particles, often these particles are of micron size and surrounded by water. The surface tension of the Water has a large eifect on the magnetic susceptibility of the mass of material.

In machines built according to previous design, magthe rotating drum and there would be a tendency for the muck to wash off, carrying the magnetizable particles with it, after it has once been caught by the drum due to apparent close association of the iron and water. Some of the difliculties were apparent in previous machines of the non-self-cleaning fore it had to be cleaned. having drums of the self-cleaning type were used, the

pass through, along Because it was necessary to provide a large clearance =ment, by catching fore they passed between the drum and the shroud it is possible to provide a smaller clearance between the drum and shroud and, thereby, make all the muck pass in closer association with the magnetic drum and thus provide a much more effective removal of the magnetizable particles from the muck.

It is, accordingly, an object of this invention to provide a magnetic separator with a very small clearance between the rotating drum and the fixed member through which clearance the material to be separated passes.

It is another object of the invention to provide a means for intercepting large particles of foreign matter from the liquid to be separated before the liquid passes between the magnetic element and the shroud.

It is another object of the invention to provide a magnetic separator which will very elfectively separate magnetizable particles from non-magnetizable material.

Another object of the invention is to provide a magnetic separator which will separate magnetizable particles from a liquid efiiciently and completely.

With the above and other objects in View, the present invention consists of the combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, minor details of construction Without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings:

2,765,912 Patented Oct. 9, 1956 ice Now with more specific reference to the drawings, I

Figs. 1, 2, and 3 show a magnetic separator 1 with an inlet member 2 having a flange 3 for attaching a pipe carrying liquid and other materials to be separated. The inlet member 2 is attached to the frame or housing 13 at 4 and the ends of the housing are provided with flanges 5 and the end shields 6 are attached to the flanges 5 by bolts 7. The end shields 6 are provided with bearings 8 and a pressure seal 9 is provided to prevent leakage of material being separated which may be fed into the inlet member 2 above atmospheric pressure. The lower portion of the housing'13 has a sump 10 attached thereto at 11 for receiving the magnetizable material removed from the liquid. A discharge passage 12 is attached to the housing 13 at 15. Liquid from which the foreign magbeen removed passes through the discharge passage 12. The discharge passage 12 has a flange 15a integral therewith adapted to be attached to a pipe line or duct.

ner. The specific details of the drum constitute no part of this invention. A shroud 30 is supported inside the housing 13 by brackets 31 and a trap 32 is formed on A deflecting member 40 is attached to the housing at 41. A barrier 42 is attached to the housing 13 at 43 and it makes sliding contact With the drum 20 at 44. The barrier 42 directs the material fed through the inlet member 2 which flows around the end 34 of the trap 32 back upward between the shroud 30 and the drum 20. It also serves to scavenger any magnetic material which may tend to cling to the outer periphery of the drum 20 after passing the induction wheel 50. Magnetic drum 20 is supported in the bearings 8 by means of shaft 21 having an extension 22 and having a keyway 23 for attaching a pulley or other driving means.

The sump 10 has a flange 16 attached thereto for mating with a flange 17 on a reducing member 18 which terminates in a flange 19. Flange 19 may be attached to a pipe line or to a reservoir for receiving the foreign particles removed from the muck.

The induction wheel 50 is pivotally mounted on'shaft 53. Wheel 50 is made up of drum shaped body 51 made of non-magnetizable material. Magnetizable elements 52 are attached to the non-magnetizable drum shaped body 51 at spaced points. When drum 20 is rotated, the elements 52 will be magnetically induced. Since the elements 52 are of thin cross section, an increased flux rotate, carrying the particles adhering thereto away from drum 20. When a particular element 52 reaches a position in rotation approximately ninety degrees from its position nearest drum 20, the magnetization of the ele ments 512 will weaken to the extent that the particles adhering thereto Will be released and the particles will fall into sump 10.

During operation, the flange 3 is connected to an inlet pipe line carrying oil or other liquid containing magnetizable particles which are to be separated therefrom. The liquid is directed by barrier 45 down around the outer side of shroud 30 between the shroud and the housing 13 and aroundthe end 34 of the shroud. Large particles are retained in the trap 32 and prevented from flowing through the passage 35. The large magnetizable particles are prevented from being flushed out of the trap 32 by the magnetic attraction of the magnets 28a which tend to hold the original magnetic particles in the trap 32. The remainder of the liquid flows downward around and 34 and is intercepted by barrier 42, directed between drum 20 and shroud Sit, and flows around to the end 36 of the shroud 30. The material is then directed back upwardly by the deflecting member 4 3 into the discharge pipe 12. The discharge pipe 12 has three

branches

12a, 12b, and 12c to provide a more efficient discharge for the nonmagnetizable material. The liquid discharges through passage 12'. Because of the small clearance between the drum 20 and the shroud 30 and because of the relative speed of the drum surface and the liquid and the resulting combing action of the drum and the magnetic field on the liquid, magnetizable particles suspended in the liquid are attracted to the drum 20 and afiix themselves thereto. The liquid which is free from magnetizable particles is discharged through the discharge passage 12. The magnetizable particles are carried on the drum to the induc tion wheel 50 and are released by the induction wheel 50 into the sump 10. Any particle tending to adhere to the wheel is scraped from the drum by the barrier 42.

In the foregoing specification, I have set forth the invention in its preferred practical forms but I am aware that the structure shown is capable of modification within a range of equivalents without departing from the invention which is to be understood is broadly novel as is commensurate with the appended claims.

What I claim is:

1. A magnetic separating device comprising a rotatable magnetic cylinder having spaced magnetic fields around the inner periphery thereof, means to feed material to be separated into the face thereof, a rotatable magnetizable member adjacent said cylinder, the axis of rotation of said magneti'zable member being generally parallel to the axis of rotation of said cylinder, said rotatable memher being disposed adjacent the periphery of said cylinder at a point remote from the point Where material is fed onto said cylinder for removing magnetic particles from the face of said cylinder, a portion of said rotatable magnetizable member being outside of the active magnetic-field of the magnets rotatable with said cylinder, a shroud fixed to said device and spaced a predetermined distance from said'cylinder, and trap means adjacent said cylinder on said shroud to collect large particles of foreign material to prevent said large particles from passing between'the shroud and "the cylinder.

2. A magnetic separating device comprising a cylindricalhousing, a rotatable magnetic cylinder in said housing, means to feed material'to be separated onto the face of said cylinder, 'a shroud fixed to said device disposed between said cylinder and said housing and spaced from said cylinder, trap means on said shroud and in said cylindrical housing disposed to collect large particles of foreign material, directing means to direct the flow of material between-said shroud and said cylinder, and discharge means for said material.

'3. Amag'neticseparatingdevice comprising a rotatable cylin'derhaviri'g magnets spaced around the inner peripher'y thereof, 'a' frameto supportgsaidcylinder, a sh-roud attached to said-frameand disposed in spaced relation to said cylinder and e iit'e'ridin'g-around 'said cylinder a substantial pdrtionof flie periphery thereof, said shroudterminating at one end thereof in a trap, and deflecting means to direct the flow of material to be separated along the outside of said shroud and then around the end of said shroud past said trap whereby large particles are entrapped in said trap and the remaining material being conducted between said cylinder and said shroud whereby magnetizable particles are attracted to and affix themselves to said cylinder.

4. A magnetic separating device comprising a frame, a magnetic member rotatably mounted on said frame, a shroud mounted on said frame and concentrically disposed in spaced relation to said member, a trap on said shroud to intercept large particles of material to prevent them from flowing between said shroud and said member, means to direct material to be separated along the outside of said shroud, then into said trap and then between said shroud and said member whereby magnetizable particles from said material adhere to said magnetic member, and means to discharge said material.

5. The magnetic separating device recited in claim 4 wherein said trap comprises one end of the shroud bent outward and back on itself in the form of a pocket.

6. The magnetic separating device recited in claim 4 wherein a rotatable magnetizable member is mounted on said frame adjacent said magnetic member, the axis of rotation of said magnetizable member being generally parallel to the axis of rotation of said magnetic member to cause the magnetizable material adhering to said magnetic member to be discharged from said magnetic member into a sump.

7. A magnetic separating device comprising a frame, a magnetic member rotatably mounted on said frame, a shroud mounted on said frame and concentrically disposed in spaced relation to said member, a trap on said shroud to intercept large particles of material to prevent them from flowing between said shroud and said member, means to direct material along the outside of said shroud and around the end thereof, and means to direct material to be separated between said shroud and said member and to discharge said material, magnetizable-material being discharged into a sump and non-magnetizable material being discharged into a duct.

8. A magnetic separating device comprising a frame, a magnetic cylinder rotatably mounted on said frame, a shroud attached to said frame in spaced relation to said cylinder, means to feed material to be separated into the space between said cylinder and said shroud, means to direct material along the outside of said shroud and around the end thereof, a trap fixed to said shroud to intercept the flow of large foreign particles to prevent them from flowing between said cylinder and said shroud, discharge means disposed at the end of said shroud remote from said.trap, including sump means, to discharge magnetizable material, duct means to receive nonmagnetizable material, and a deflecting member in the path of flow of said non-magnetizable material attached to said frame between said sump means and duct means.

9. The magnetic separating device recited in claim 8 wherein a rotatable magnetizable member is mounted on said frame adjacent the sump means whereby magnetizable particles which adhere to said cylinder are attracted to said rotatable magnetizable member and discharged therefrom.

10. A magnetic separating device comprising a rotatable magnetic cylinder, at shroud fixed to said device and spaced a predetermined distance from said cylinder, means to feed material to be separated into the face of said cylinder between said shroud and said cylinder, a discharge duct disposed at a spaced point relative to the periphery of said cylinder from the feed means thereto, the end of said shroud remote from said feeding means beingbent outward and then back approximately one hundred eighty degrees-terminating at apoint overlapping the portion of said duct adjacent said cylinder whereby the direction of flow of said material to be separated is'reversed.

11. A magnetic separator for fluid comprising a generally cylindrical housing, a shroud in said housing, a magnetic drum in said shroud generally concentric therewith and spaced therefrom, an inlet to said housing and an outlet to said space between said drum and said shroud, sa-id shroud extending between said inlet and said outlet, means to direct the flow of fluid along the outside of said shroud from said inlet around the end of said shroud and into said space between said drum and said shroud, and means to direct the flow of fluid around the outlet end of said shroud to said outlet whereby the direction of flow is substantially reversed, said means to direct the flow of fluid around said outlet end of said shroud comprising a deflecting member attached to said housing and extending drum.

References Cited in the file of this patent UNITED STATES PATENTS Payne Jan. 30, 1940 Caldwell Apr. 12, 1949 Blind May 20, 1952 Mojden et al Dec. 7, 1954 FOREIGN PATENTS Great Britain 1911