WO1997025123A1 - Vacuum loadable liquid/solid separator - Google Patents
Vacuum loadable liquid/solid separator Download PDFInfo
- Publication number
- WO1997025123A1 WO1997025123A1 PCT/US1997/000384 US9700384W WO9725123A1 WO 1997025123 A1 WO1997025123 A1 WO 1997025123A1 US 9700384 W US9700384 W US 9700384W WO 9725123 A1 WO9725123 A1 WO 9725123A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dividing wall
- separator according
- filter
- pipe
- cavity
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 83
- 239000007787 solid Substances 0.000 title claims abstract description 68
- 239000010802 sludge Substances 0.000 claims abstract description 76
- 238000012216 screening Methods 0.000 claims description 25
- 238000005260 corrosion Methods 0.000 claims description 13
- 230000007797 corrosion Effects 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000005484 gravity Effects 0.000 abstract description 5
- 230000002706 hydrostatic effect Effects 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 description 15
- 239000011152 fibreglass Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 239000012071 phase Substances 0.000 description 11
- 229910001335 Galvanized steel Inorganic materials 0.000 description 10
- 239000008397 galvanized steel Substances 0.000 description 10
- 239000004033 plastic Substances 0.000 description 10
- 239000010935 stainless steel Substances 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 10
- 230000009471 action Effects 0.000 description 5
- 230000001965 increasing effect Effects 0.000 description 5
- 230000000717 retained effect Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 239000000701 coagulant Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B01D35/30—Filter housing constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/23—Supported filter elements arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/23—Supported filter elements arranged for outward flow filtration
- B01D29/232—Supported filter elements arranged for outward flow filtration with corrugated, folded or wound sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/10—Filtration under gravity in large open drainage basins
Definitions
- TECHNICAL FIELD This invention relates generally to liquid-solid separators and particularly to portable separators employing a combination of filtration and capillary action for treatment of sludge in bulk.
- the object of liquid solid separators is to remove the liquid from solids in a sludge. This is desirable for several reasons. First, certain environmental regulations require the water content of solid waste to be below specified levels before it may be accepted in a landfill. Second, such waste must frequently be hauled to the treatment or disposal site, and the freight carriers, as well as the disposal site, often charge by the pound. Finally, in many industrial processes, the finished product will be either a solid or a liquid contained in a sludge, and it will be necessary to separate the solid from the liquid phase in order to isolate the finished product.
- Harris discloses a phase separator that comprises a tank having a bed and surrounding sides. A grating is supported over the bed and walls leaving a space between the grating and the wall and the bed below. A screen is attached to the grating. A filter is then laid over the screen and grating, and sludge is deposited in the tank on top of the filter. The liquid in the sludge will move through the filter. In Harris, movement from the sludge to the filter is accomplished by gravity, hydrostatic pressure and by wicking, or capillary action. After passing through the filter, the liquid will collect in the space between the bed and the grating.
- a drain is provided to allow such liquid to be released from the tank.
- a shortcoming in such a separator is that with many types of sludge, the center portion of the tank either will not dry completely or takes an excessively long time to dry. This results in increased freight charges, lengthy drying times and, occasionally, rejection by landfills.
- blinding Another problem faced by those attempting to remove liquids from sludge is "blinding. " One cause of blinding is when the liquids pass through the filter rapidly. When this occurs, the finer solids are carried with the liquid to the filter where the solids are deposited. As the solids are deposited, they coat the filter and can substantially inhibit further drainage through the filter.
- one object of this invention is to provide a tank which will affect liquid-solid separation.
- Another object of this invention is to provide a separator which reduces the amount of liquid the sludge mass will retain at its center.
- Another object of this invention is to provide a separator with increased surface area and a shorter pathway to free flow space.
- Another object of this invention is to provide a separator which allows for collection of the liquid phase.
- Another object of this invention is to provide a separator which can be used for hazardous waste.
- Another object of this invention is to provide a separator which is vacuum loadable.
- Another object of this invention is to provide a separator which can be transported without additional handling of the retained solids.
- Another object of the invention is to provide a separator from which the retained solids may be easily unloaded.
- Another object of this invention is to provide a separator which can be used for sludge containing fines and particulate matter. Still another object of this invention is to offset or reduce the effects of "blinding" in the separation process.
- a portable liquid solid separator is provided.
- the separator consists of a tank having walls and a floor.
- the tank resembles a large rectangular municipal garbage dumpster.
- One of the walls is hinged so that it can function as a door.
- the door will, of course, be equipped with a watertight seal to prevent leaks.
- the inside of the tank is covered with a heavy metal grating.
- a space between the grating and the walls and the grating and the bed of the tank is also one or more dividing walls composed of grating that protrude vertically from the grating covering the bed of the tank.
- All grating surfaces - those overlaying the walls and the bed as well as those forming the dividing wall - will be covered by a screen.
- all edges of the screen exposed to the interior of the tank should be smooth.
- the top edge of each dividing wall should be smooth and continuous. If there are exposed rough edges or corners in the screen or the dividing wall, the filter may catch on such edges. If the filter becomes caught, it may tear when weight is placed on it, or it may pull the screen loose when the filter and retained solids are removed. By making all exposed edges smooth, the potential for tearing the filter or screen will be substantially reduced.
- Sludge that is to be treated is deposited in the tank over the filter.
- the screen will distribute the weight of the sludge on the grating so that the filter will not sag down into the spaces in the grating and become lodged or possibly torn. If the openings in the grating are small enough, a screen may not be needed to keep the filter from sagging into the grating openings.
- the dividing wall allows liquid in the central portion of the tank to drain more thoroughly and more quickly. Without the dividing wall, liquid in the central portion of the tank must travel the greater distance to the filter and grating covering the bed or walls in order to drain. By adding one or more dividing walls, the distance liquids in the center of the tank must travel to reach a drainage surface can be substantially reduced while the total surface area available for drainage is simultaneously increased. By adding the dividing wall or walls, these goals of increased drainage surface area and decreasing the distance fluid must travel are accomplished without substantially altering the volume capacity of the tank, or the method of removing the solids.
- a pipe along the top of the dividing wall may be attached to a compressed air source and perforated with air holes. In this way, air may be pumped into the center of the tank, further enhancing drying.
- Figure 1 is a cut-away perspective view of a preferred embodiment of the separation tank where the target solids opening is a hinged rear gate wall swung open to better illustrate the interior of the separation tank.
- Figure 2 is a cross-sectional view of a preferred embodiment of the dividing walls extending vertically from the bed of the separation tank.
- Figure 3 is a cut-away, perspective view of the grating and screening used to cover the walls, the bed and the dividing wall of the separation tank.
- Figure 4 is a cut-away, perspective view of the interior of the separation tank at the end opposite the door shown in figure 1 which better illustrates the introduction of compressed gas into the interior of the separation tank via the air holes in the pipe.
- Figure 5 is a cut-away, perspective view of the fencing and screening used to cover the walls, the bed and the dividing wall of the separation tank.
- Figure 6 is a cut-away, perspective view of the corrugated sheets and screening used to cover the walls, the bed and the dividing wall of the separation tank.
- Figure 7 is a cross-sectional view of a preferred embodiment of a vacuum loadable separator with the filter in place.
- Figure 8 is a perspective view of a preferred embodiment of a vacuum loadable separator.
- Figure 9 is a cut-away, perspective view of the filter installed over a pipe section.
- the invention is a tank 1 for the separation of targeted solids from liquid in sludge.
- Sludge is intended to include all liquid-solid mixtures regardless of the particle size of the solid, composition of the liquid or percentage of liquid in the mixture.
- Tank 1 has bed 2 and walls 3 surrounding bed 2. The surfaces 4 of bed 2 and walls 3 form a sludge receiving cavity 5.
- Target solids opening 6 is provided in tank 1.
- Target solids opening 6 may be an open top 7 to tank 1. Alternatively, it may be a gate formed in any of walls 3. Any one of walls 3 may also be wholly or partially removable.
- target solids opening 6 comprises using one of walls 3 as a door 10 by mounting one of walls 3 on a hinge.
- Door 10 should be equipped with a watertight seal 12 to prevent leaks.
- a dividing wall 8 divides sludge receiving cavity 5.
- several dividing walls 8 are provided in tank 1, as shown in figure 2.
- Dividing wall 8 is positioned so that it is generally pe ⁇ endicular to bed 2.
- dividing wall 8 should be substantially pe ⁇ endicular to target solids opening 6.
- dividing wall 8 should adjoin the surface 4 of either walls 3 or bed 2 that is opposite target solids opening 6.
- dividing wall 8 will be sized and fixed to approximately longitudinally center the upper edge 43 of dividing wall 8 in sludge receiving cavity 5. In a preferred embodiment, dividing wall 8 should be approximately the length of sludge receiving cavity 5. In another preferred embodiment, upper edge 43 of dividing wall 8 is a continuous smooth surface. This can be accomplished by attaching a pipe 31, a square tubing or conduit, to upper edge 43. Alternatively, dividing wall 8 may be finished so that upper edge 43 is smooth.
- a liquid filter 9 is positioned in sludge receiving cavity 5 so that filter 9 drapes over dividing wall 8.
- Filter 9 may be attached to tank 1 by suspension hooks or clips which are attached to walls 3 or to first support means 14.
- a mounting plate 38 is attached to the top edge of first support means 14. The edges of filter 9 are hooked to suspension hooks or clips. Filter 9 is then draped over mounting plate 38 so that the weight of filter 9 is distributed across mounting plate 38.
- the edges of filter 9 extend substantially beyond the tops of walls 3 so that filter 9 is held in position over sludge receiving cavity 5 by gravity and the weight of the sludge as it is deposited into tank 1.
- filter 9 The material and mesh size of filter 9 are chosen to retain the target solids in the particular sludge being handled while allowing liquids in the sludge to pass through. Important design considerations are the corrosiveness, solvent strength, particle size and separation criteria for a sludge. Another consideration for filter 9 is that it be suitable to employ capillary action to wick up the liquid from the sludge. Examples of suitable filter media are: paper, cotton, nylon and other organic polymers, metal mesh and fiberglass. Those with skill in the art may choose from a variety of fibrous filters on the market to meet the aforementioned design criteria.
- filters containing cotton will be suitable to wick aqueous liquids while filters containing organic polymers, such as polypropylene, will be able to wick organic liquids. Wicking action is particularly helpful with sludges containing fines which do not drain well and wherein the liquid tends to pool on top of the sludge.
- first support means 14 comprises a grating 16 having grating openings 17 which is mounted over bed 2 and walls 3.
- a screening 18 is laid over grating 16.
- Filter 9 rests over screening 18.
- Grating 16 and screening 18 separate filter 9 from bed 2 and walls 3, providing first free flow space 15.
- the primary pu ⁇ ose of screening 18 is to prevent filter 9 from extending substantially into grating openings 17.
- screening 18 should contain no rough edges that face the interior of sludge receiving cavity 5, in order to avoid tearing screening 18 or filter 9 as filter 9 is removed from tank 1.
- screening 18 has four to six openings per linear inch and is made of stainless or galvanized steel or plastic or fiberglass. If grating openings 17 are sufficiently small, screening 18 need not be used.
- grating 16 should be made of a strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass.
- first support means 14 comprises a heavy coarse screening (not shown) mounted over bed 2 and walls 3.
- Filter 9 rests over coarse screening, to provide first free flow space 15.
- screening 18 may be used in conjunction with coarse screening.
- coarse screening should be a strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass.
- first support means 14 comprises corrugated sheets 41 mounted over bed 2 and walls 3. Filter 9 rests over corrugated sheets 41, to provide first free flow space 15. If necessary, screening 18 may be used in conjunction with corrugated sheets 41.
- corrugated sheets should be a strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass.
- first support means 14 comprises a fencing 42 having fencing openings 43.
- Fencing 42 is mounted over bed 2 and walls 3.
- Filter 9 rests over fencing 42 to provide first free flow space 15. If necessary, screening 18 may be used in conjunction with fencing 42.
- fencing 42 should be made of a strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass.
- first support means 14 comprises perforated sheets (not shown) having perforation openings 23. Perforated sheets are mounted over bed 2 and walls 3. Filter 9 rests over perforated sheets to provide first free flow space 15. If necessary, screening 18 may be used in conjunction with perforated sheets. In a more preferred embodiment, perforated sheets are comprised of strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass. In another alternative preferred embodiment, first support means 14 comprises a series of spaced bars (not shown) lining bed 2 and walls 3. Filter 9 rests over spaced bars to provide first free flow space 15. If necessary, screening 18 may be used in conjunction with spaced bars. In a more preferred embodiment, spaced bars should be made of a strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass.
- Second free flow space 25 should be provided between filter 9 and dividing wall 8.
- Second free flow space 25 may be provided by second support means 26.
- Dividing wall 8 can be composed of either second support means 26, or second support means 26 can be mounted over dividing wall 8.
- Preferred embodiments of second support means 26 include grating 16, coarse screening, corrugated sheets 41 , fencing 42, perforated sheets, and spaced bars. All may be used in conjunction with screening 18, if necessary.
- second support means 26 is made of a strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass.
- first support means 14 and second support means 26 and screening 18, if desired, may be combined into a basket (not shown).
- the basket may be composed of grating 16, coarse grating, corrugated sheets, fencing, perforated sheets, or spaced bars.
- the basket is made of a strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass.
- the basket may be removable from tank 1.
- first liquid removal means 27 Liquid that enters first free flow space 15 should be removed for separation to continue. This is accomplished through first liquid removal means 27.
- Preferred embodiments of first liquid removal means 27 include a drain 28 in the bottom of any one of walls 3 or in bed 2 connecting first free flow space 15 to the exterior of tank 1, or a conventional pump, siphon or vacuum line (not shown) connecting first free flow space 15 to the exterior of tank 1.
- drain 28 should be located at or below the level of bed 2.
- Second liquid removal means include drain 28, or a conventional pump, siphon or vacuum line.
- Second free flow space 25 and first free flow space 15 may be fluidly connected so that a single drain 28 performs the functions of both first liquid removal means 27 and second liquid removal means.
- dividing wall 8 is provided with a pipe 31.
- pipe 31 contains a central passageway 32.
- Pipe 31 is substantially parallel to dividing wall 8.
- Pipe 31 is fitted to receive compressed gas from a compressed gas source.
- compressed gas source is an air compressor.
- pipe 31 contains at least one air hole 35 connecting central passageway 32 to sludge receiving cavity 5.
- air holes 35 are located in the upper half of pipe 31.
- air holes 35 are located in the upper quartile of pipe 31.
- compressed gas may be steam, provided the material for filter 9 is chosen to withstand the heat.
- pipe 31 has a removable cap which when removed provides access to central passageway 32 so that central passageway 32 may be readily cleaned.
- pipe 31 should be composed of a strong corrosion resistant material such as stainless or galvanized steel or plastic or fiberglass.
- sludge is deposited in tank 1 over filter 9.
- Liquid in the sludge drains through filter 9 via gravity, hydrostatic pressure, and capillary action. Filter 9 will wick the liquid to first free flow space 15 and to second free flow space 25. The liquid will run down both free flow spaces 15 and 25. In a preferred embodiment, both free flow spaces 15 and 25 are connected so that liquid will collect over bed 2.
- the liquid may be removed from tank 1 via drain 28.
- tank 1 may be angled toward drain 28 to enhance drainage.
- tank 1 may be vacuum loadable. In this embodiment, tank
- First port 102 will generally be attached to a loading hose which will draw from the sludge that is to be loaded into tank 1.
- Second port 102 will be attached to a vacuum source such as a vacuum truck or other similar source. By pulling a vacuum through tank 1, sludge may be loaded into tank 1 via first port 102 and the loading hose.
- a vacuum strength of 15-28 inches of mercury should be sufficient to load most sludges.
- ports 102 and 103 have an 8 inch diameter.
- An additional, larger inspection port 105 may be desired to allow worker access to the interior of tank 1 while target solids removal opening 6 is closed.
- filter 9 When closed top 101 is used to facilitate vacuum filling of tank 1, care should be taken to ensure that filter 9 remains in place and that sludge does not end up behind filter 9 in first free flow space 15.
- a preferred way to do this is to provide a filter 9 that covers the entire sludge receiving cavity 5 including the inside surface of closed top 101.
- filter 9 may be suspended from hooks 110 which may be positioned in the upper corners of closed top 101.
- filter 9 will have to contain apertures to allow for the introduction of sludge into sludge receiving cavity 5.
- Pipe sections 106 may be provided in ports 102 and 103 to allow for passage through filter 9. In this preferred embodiment, pipe sections 106 are provided with shoulders 107.
- Filter 9 may be attached to pipe sections 106 by using constrictors 108 such as elastic bands or cable ties to secure filter 17 to pipe sections 106 above shoulders 107.
- the vacuum may then be pulled through second aperture 103 which will draw sludge through first aperture 102 and into sludge receiving cavity 5.
- the vacuum loaded tank 1 is constructed in substantially the same fashion as the non-vacuum loadable tank 1 except for closed top 101 and its ports 102 and 103.
- the exterior surface of walls 3, top 101 and bed 2 may be reinforced with ribs 109 or otherwise strengthened.
- One operating tank 1 may wish to treat the sludge with a chemical coagulant.
- chemical coagulant are frequently polymers which can be obtained commercially from Callaway Chemical, American Cyanamid and Nalco, among others.
- the pu ⁇ ose of the coagulant is to cause the sludge to clump together or coagulate. This will force the liquids away from the solids, allowing them to drain more quickly.
- the coagulation will also trap many of the fine particles contained in the sludge in the clumps. This will help reduce blinding.
- Dividing wall 8 provides enhanced drainage for the middle of tank 1 by increasing the surface area available for drainage in tank 1 and simultaneously decreasing the distance liquid in the middle of tank 1 has to travel to reach a drainage surface without substantially altering the volume of tank 1. Liquid that tended to become trapped in the center of tank 1 because of its distance from the drainage surfaces can exit tank 1 through the portion of filter 9 overlaying dividing wall 8.
- tank 1 is mounted on rollers 39. After the sludge is sufficiently dry, tank 1 may be rolled onto a flat-bed truck or trailer or other transportation device. In a preferred embodiment, the exterior of tank 1 is provided with at least one hook to assist in winching tank 1 onto a transportation device.
- tank 1 Once loaded onto the transportation device, tank 1 will be transported to either a disposal site or to a site for further treatment if it is waste material. If the retained solids are a product in a manufacturing process, they may be retrieved and used. In either case, target solids removal opening 6 will be opened and the deliquified target solids and filter 9 will be removed from tank 1. After a cleaning and installation of a new filter 9, tank 1 will be ready for use again.
- tank 1 may be provided with handles to facilitate emptying. Handles can engage the dumping mechanism of a receptacle vehicle such as those used for garbage collection. Such an embodiment would be most useful when target solids removal opening 6 comprises open top 7. It is noted that when tank 1 has open top 7, one operating tank 1 may wish to cover open top 7 when tank 1 is exposed to the elements to prevent rainfall from interfering with the drying of the sludge.
- Blinding may be reduced through a method of operating tank 1.
- First and second liquid removal means should be closed when sludge is deposited into sludge receiving cavity 5. After first free flow space 15 and second free flow space 25 have filled with liquid, further flow through filter 9 will be prevented. Thus, the liquid in the sludge will stagnate, allowing the solids to settle out. This may, depending on the initial consistency of the sludge, result in the formation of two phases in the sludge: a relatively solid free fluid phase and a remaining sludge phase. When relatively solid free fluid phase has formed, first and second liquid removal means may be opened.
- the liquid that comprises relatively solid free fluid phase contains little interstitial matter relative to the remaining sludge phase, it will drain off before the liquid that is still trapped in the remaining sludge phase. Blinding will be minimized because many of the finer solids that were the root of the problem will have settled into the remaining sludge phase or will lie immediately above the remaining sludge phase. The liquid flow out of the remaining sludge phase will be slow enough to prevent substantial blinding there. Any blinding that does occur in the filter area above the remaining sludge will be inconsequential because no further filtration will be performed in that part of tank 1.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69720697T DE69720697T2 (en) | 1996-01-11 | 1997-01-10 | VACUUM-FILLABLE LIQUID / SOLID SEPARATOR |
EP97902886A EP0885043B1 (en) | 1996-01-11 | 1997-01-10 | Vacuum loadable liquid/solid separator |
CA002242585A CA2242585C (en) | 1996-01-11 | 1997-01-10 | Vacuum loadable liquid/solid separator |
AU16955/97A AU1695597A (en) | 1996-01-11 | 1997-01-10 | Vacuum loadable liquid/solid separator |
JP9525415A JP2000503250A (en) | 1996-01-11 | 1997-01-10 | Vacuum-fillable liquid-solid separator |
HK99103587A HK1018417A1 (en) | 1996-01-11 | 1999-08-17 | Vacuum loadable liquid/solid separator |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/584,555 | 1996-01-11 | ||
US08/584,555 US5589081A (en) | 1996-01-11 | 1996-01-11 | Divided phase separator for liquid/solid seperation in sludge |
US08/703,960 US5707535A (en) | 1996-01-11 | 1996-08-28 | Vacuum loadable divided phase separator for liquid/solid separation |
US08/703,960 | 1996-08-28 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/703,960 Continuation-In-Part US5707535A (en) | 1996-01-11 | 1996-08-28 | Vacuum loadable divided phase separator for liquid/solid separation |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/113,217 Continuation-In-Part US6004461A (en) | 1996-01-11 | 1998-07-10 | Divided phase separator |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997025123A1 true WO1997025123A1 (en) | 1997-07-17 |
Family
ID=27079129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/000384 WO1997025123A1 (en) | 1996-01-11 | 1997-01-10 | Vacuum loadable liquid/solid separator |
Country Status (9)
Country | Link |
---|---|
US (2) | US5707535A (en) |
EP (1) | EP0885043B1 (en) |
JP (1) | JP2000503250A (en) |
CN (1) | CN1070723C (en) |
AU (1) | AU1695597A (en) |
CA (1) | CA2242585C (en) |
DE (1) | DE69720697T2 (en) |
HK (1) | HK1018417A1 (en) |
WO (1) | WO1997025123A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013103198A1 (en) * | 2012-01-05 | 2013-07-11 | (주)에스이피 | Particle recovery apparatus having liquid filter part |
Families Citing this family (52)
Publication number | Priority date | Publication date | Assignee | Title |
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Also Published As
Publication number | Publication date |
---|---|
EP0885043A4 (en) | 2000-06-07 |
US5707535A (en) | 1998-01-13 |
HK1018417A1 (en) | 1999-12-24 |
DE69720697D1 (en) | 2003-05-15 |
EP0885043B1 (en) | 2003-04-09 |
CA2242585A1 (en) | 1997-07-17 |
JP2000503250A (en) | 2000-03-21 |
CA2242585C (en) | 2005-08-02 |
CN1070723C (en) | 2001-09-12 |
DE69720697T2 (en) | 2003-10-23 |
US6004461A (en) | 1999-12-21 |
EP0885043A1 (en) | 1998-12-23 |
AU1695597A (en) | 1997-08-01 |
CN1208359A (en) | 1999-02-17 |
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