Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
  • B01D35/06—Filters making use of electricity or magnetism
• • 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
  • B03C1/00—Magnetic separation
  • B03C1/02—Magnetic separation acting directly on the substance being separated
  • B03C1/025—High gradient magnetic separators

Definitions

• This invention relates to fluid filters and, more particularly, to techniques for removing magnetizable material from fluids through electromagnetic techniques and the like.
• the present invention involves a magnetic filter for removing from fluids substances attractable to magnets.
• the device includes a vessel with at least one magnetizable filter assembly disposed therein.
• Conduit means are provided to supply unfiltered fluid to, and remove filtrate from the vessel,
• Mag netizing means are provided to magnetize the filter assembly.
• the magnetizing means is removable and replaceable without disrupting the circulation of fluid to, through, or from the vessel.
• the present invention overcomes the disadvantages of the prior art by locating the fluid flow inlet and outlet to the vessel on the same end of the vessel thereby enabling removal of the electromagnetic coil without necessitating removal of flanges or cutting of pipe. Where a plurality of electromagnetic coils is used, such as when dual flow filters are employed, both inlet and outlet could be alternatively located between the coils thereby allowing removal of each of the coils at its respective end of the vessel.
• a nonmagnetizable core is provided to the filter bed by a center filtrate outlet piping.
• This nonmagnetizable core is the center of the bed where the magnet field is the weakest enables lower energy usage while sustaining sufficient magnetic field strength to all portions of the bed to hold the balls down in the fluid flow stream.
• Other advantages of the invention are yielded by the result that with both inlets at the same end or on approximately the same horizontal palne less piping is required and support structure can be located close to the piping connection resulting in less severe loads on the supports under seismic and burst pipe events.
• An electromagnetic filter 10 that characterizes the invention has a vertically mounted longitudinally extended cylindrical vessel 12 with upper end 14 and lower end 16.
• An access hatch 17 penetrates upper end 14 and is sealed by cover 18 held in place by studs 20 and nuts 21.
• Lower end 16 is penetrated by inlet 22 and outlet 24.
• Center pipe 26 entends longitudinally from outlet 24 through the vessel.
• Cylindrical restraining screen 28 forms an extension of center pipe 26.
• Lid 30 is affixed to screen 28 thereby directing all flow through vessel 12 to center pipe 26 through screen 28.
• Knob 32 extends upward from disc 30 and is engaged by receiver 34 being affixed to end 14. Knob 32 however does not extend to the surface of end 14 threeby providing allowance for a discrepancy in thermal expansion of vessel 12 and center pipe 26.
• Electromagnetic coil assembly 36 circumscribes vessel 12 and rests on and is ran ⁇ vably affixed to support plate 39 by studs 50 and nuts 52. Plate 39 is affixed to end 16 of vessel 12. Structure supports the electromagnetic filter 10 at support plate 39. This structure is readily supplied by one skilled in the art of industrial support structure and for clarity is not shown, in the drawing. Lifting lugs 37 are provided to coil assembly 36 for lifting assembly 36 off of support plate 39 for servicing of assembly 36. It is apparent that this may be accomplished without disturbing connections to inlet 22 or outlet 24.
• Bed 40 Disposed withon vessel 12 is magnetizable filter bed 40.
• Bed 40 includes a plurality of magnetizable pellets 41. In the preferred embodiment 1/8" diameter steel balls are used as pellets 41.
• Bed 40 is supported within the vessel by support plate 38 which is an annular ring apertured to preclude the passage of pellets 41 therethrough while allowing the passage of fluid therethrough.
• Perforated annular ring flow diffusers 46 and 48 are mounted to cylindrical mounting sleeves 42 and 44 which are in turn affixed to support plate 38. Diffusers 46 and 48 serve to evenly distribute inlet fluid flow through bed 40.
• coil assembly 36 is energized thereby magnetizing bed 40.
• Fluid containing magnetizable Impurities enters inlet 22 in the direction of arrows 60, flows around centerpipe 26 through diffuser- 48 and 46, through support plate 38 in the direction of arrows 61. Fluid impurities are attracted to magnetized pellets 41 and the filtered fluid (filtrate) emerges from the top of bed 40 and flows through screen 28 and down center pipe 26 in the direction of arrows 62. Filtrate then flows through center pipe and exits via outlet 24 in the direction of arrow 63.
• the area within vessel 12 above bed 40 is provided to enable cleaning of bed 40 by flushing of the apparatus.
• flushing filter 10 the flushing fluid flows in a vertically upward direction within the vessel 12, generally following the direction of the arrows 61.
• the force of the upwardly flowing stream of flushing fluid is applied to the balls in the bed 40 in a direction that is opposite to the gravitational force direction.
• Die oppositely directed forces tend to "fluidize” and agitate the filter bed by increasing its volume and causing the individual balls to separate and bounce against one another. Screen 28, however, prevents pellets 41 frcm entering center pipe 26.
• Another embodiment would employ a second vessel disposed within the first.
• the second vessel would hold the bed of pellets. Flew enters the second vessel, flows up therethrough, passing through the bed of pellets and then down the annulus formed between the two vessels to the outlet.
• Another embodiment could employ two coil assemblies with the inlet and outlet positioned therebetween. This embodiment would enable dual flow capability.

Landscapes

• Engineering & Computer Science (AREA)
• Water Supply & Treatment (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Filtration Of Liquid (AREA)
• Filtering Materials (AREA)
• Respiratory Apparatuses And Protective Means (AREA)
• Water Treatment By Electricity Or Magnetism (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=22463074

Family Applications (1)

Country Status (9)

Cited By (5)

Families Citing this family (1)

Citations (4)

Family Cites Families (4)

• 1981
  • 1981-03-12 KR KR1019810000807A patent/KR850001771B1/ko not_active Expired
  • 1981-03-23 IT IT20663/81A patent/IT1135696B/it active
  • 1981-03-23 WO PCT/US1981/000383 patent/WO1981002685A1/en not_active Ceased
  • 1981-03-23 EP EP81901068A patent/EP0048272B1/en not_active Expired
  • 1981-03-23 JP JP56501379A patent/JPS594168B2/ja not_active Expired
  • 1981-03-23 DE DE8181901068T patent/DE3165921D1/de not_active Expired
  • 1981-03-24 ES ES500660A patent/ES500660A0/es active Granted
  • 1981-03-25 MX MX186539A patent/MX152794A/es unknown
  • 1981-03-27 CA CA000374023A patent/CA1158567A/en not_active Expired

Patent Citations (4)

Non-Patent Citations (1)

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