US3658262A - Sewage sludge and garbage grinder - Google Patents
Sewage sludge and garbage grinder Download PDFInfo
- Publication number
- US3658262A US3658262A US83346A US3658262DA US3658262A US 3658262 A US3658262 A US 3658262A US 83346 A US83346 A US 83346A US 3658262D A US3658262D A US 3658262DA US 3658262 A US3658262 A US 3658262A
- Authority
- US
- United States
- Prior art keywords
- impeller
- sludge
- grid
- plate
- cutter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
- B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
Definitions
- a sewage sludge grinder comprising a housing, a shaft in the housing, a motor for driving the shaft, a chamber in the housing surrounding the shaft, an outlet and an inlet in the chamber, said shaft being free-ended within said housing and mounting at its terminal portion an assembly comprising an impeller which faces the inlet and tends to move sludge therefrom outwardly radially a set of cutters, and a grid-plate provided with peripheral through slots, the peripheral edge of the impeller cooperating with certain surfaces on said cutters, and the forward face of the grid-plate adjacent said slots cooperating with different surfaces on said cutters, the sludge flowing through the impeller and grid-plate assembly toward the outlet.
- Another grinder uses impact to reduce particle size by means of hammers and a circular screen.
- a great disadvantage if this system is that as certain particles as for instance unground rags pass the hammers, they tend to wrap around and clog the machine. This can be eliminated by increasing the rotation speeds to a point where a high turbulence prevents the accumulation of solids but this high speed requires relatively high power consumption which is excessive.
- the grinder may be installed directly in a sludge line as e.g., a 90 elbow in a pipe.
- Sludge flows into the inlet and impinges against the rotating impeller and grid-plate assembly.
- the impeller directs the flow towards the outer edge of the grid-plate which has a number of slots along its periphery through which ground sludge passes.
- the slots in the grid-plate are cut at an angle to the direction of flow so that when it rotates, it imparts a velocity in the direction of flow and thereby acts as a low head pump.
- this machine will pump water at a rate of I G.P.M. against the static head of 3 to ft.
- the sludge flows along a rotating shaft and out through a side outlet.
- FIG. I is a view in longitudinal section showing the novel grinder
- FIG. 2 is an end view in elevation looking in the direction of arrow 2 in FIG. 1;
- FIG. 3 is a view in front elevation of the grid-plate
- FIG. 4 is an edge view thereof
- FIG. 5 is a front view of the impeller.
- a motor of a size required is indicated at M.
- This motor has a mounting plate 10 and a shaft 12 passing through a wall 14 of the assembly, the shaft 12 being sealed with respect to a chamber 16 by means of a special packing 18 which however forms no part of the present invention.
- Chamber 16 is formed by a pipe or the like 20 having an outlet 22 with mounting flange 24 and by this means is installed directly in a sludge line.
- the interior. diameter of the pipe 20 is substantially the same as that of the grid-plate 26 mounted on the shaft 12, as is also the impeller generally indicated at 28. As shown in FIG. 3, the grid-plate 26 is provided with a series of peripherally opening angular slots 30.
- Venturi type reducer Suitably mounted in extension of pipe 20 is a Venturi type reducer generally indicated at 32 being provided with a pipe plug 34 and e.g. three brackets 36, the latter each mounting a threaded rod or bolt member 38 passing through a wall 40 and including nuts 42 by which it may be axially adjusted and locked.
- Each bolt 38 mounts a cutter assembly, this being generally indicated at 44, with locking nut 46.
- the knife 44 is provided with a pair of surfaces 48 and 50, which are generally at right angles to each other, and both providing shearing action.
- the surface 50 cooperates with the peripheral edge of the impeller, see FIG. 1, and the surface 48 cooperates with the face portions of the slots 30.
- knife assemblies 44 there may be as many knife assemblies 44 as desired but it has been found sufficient to have three of these spaced at 120 apart and cooperating as stated with respect to Le, the forward face at the peripheral edge of the grid-plate 26 and the peripheral edge of the impeller.
- the inlet is indicated at 52, the sludge first contacting the impeller 28, which has the two radial arms 54 shown.
- the impeller arms 54 drive the sludge outwardly radially.
- Large objects are reduced in size by the shearing ac tion between the terminal portions of the impeller arms and the knife edges at 50, and as they begin to pass through the slots 30 at the periphery of the grid-plate, they are further reduced in size by shear between the slot edges and the knife edges at 48. With high rotational speed disintegration is accomplished by impact as well as shear and it is not therefore necessary to maintain close clearances between the shearing surfaces. It is preferable to make the impeller, the grid-plate, and knives of hardened stainless steel.
- the present grinder has no rotating or stationary obstruction on the inlet side of the grinding area on which rags and sticks can accumulate.
- the sludge flow is such that large objects are directed to the peripheral grinding area, thereby averting a build-up of unground objects on the inlet side of the pump, and this makes it possible for the new novel grinder to operate continuously without frequent shut-downs for removal of accumulated unground material.
- the cutting knives 44 are installed and adjusted from the outside of the housing and this makes it possible to adjust or replace the knives if necessary without disassembling any parts of the machine.
- the present grinder may be installed vertically in a pipe line with inlet 52 at the bottom, so that the sludge flows up towards the grinding area and this will prevent large ungrindable obwith an ordinary water-cooled stuffing box and this is the only practical device for sealing an abrasive slurry such as sewage sludge.
- the configuration of the grinder is such that all high turbulence and grinding activity is confined to a relatively small area along the periphery of the rotating impeller and the gridplate, and by confining the turbulence to a small area it is possible to accomplish the disintegration of particles with minimum power consumption.
- Grinding apparatus comprising a motor driven shaft, a housing therefor, an outlet for the housing, an impeller and grid-plate on the shaft, an inlet for the housing facing the impeller,
- said cutter having a pair of shearing surfaces at an angle to each other, one of said surfaces cooperating with the impeller at the upstream side of the flow of sludge from the inlet to reduce particles in the sludge, the other cutter surface cooperating with the peripheral edge area of the grid-plate, further reducing sludge particles downstream of the flow as regards the impeller.
- Grinding apparatus of claim 1 including means exterior of said housing for mounting said cutter.
- Grinding apparatus of claim 1 including means exterior of said housing for mounting said cutter, and means for adjusting said cutter.
- Grinding apparatus of claim 1 including means exterior of said housing for mounting said cutter, and for removing and replacing the same from outside the housing.
- Grinding apparatus for sludge comprising a housing forming a chamber, a shaft in said housing within the chamber, an inlet for the sludge,
- a rotary impeller and grid-plate assembly mounted on said shaft, a plurality of generally radially arranged circumferentially spaced cutters mounted on said housing and projecting inwardly thereof, each cutter having a pair of surfaces at angles to each other,
- the impeller including radial arms tending to force the sludge radially outwardly toward the cutters, respective surfaces of each cutter cooperating with the peripheral edge of said impeller arms providing a shearing and grinding action therewith,
- the grid-plate having a series of slots therein at the edge thereof, the slots extending through the plate, and the other respective surfaces of the cutters having a shearing and grinding cooperation with respect to the forward face of the grid-plate in the region of said slots, and an outlet, the ground sludge passing through the slots to the outlet.
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Claims (12)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US8334670A | 1970-10-23 | 1970-10-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3658262A true US3658262A (en) | 1972-04-25 |
Family
ID=22177737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US83346A Expired - Lifetime US3658262A (en) | 1970-10-23 | 1970-10-23 | Sewage sludge and garbage grinder |
Country Status (1)
Country | Link |
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US (1) | US3658262A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3738581A (en) * | 1971-10-12 | 1973-06-12 | Oberdorfer Foundries Inc | Macerating pump with means for preventing blockages |
US4275849A (en) * | 1973-05-25 | 1981-06-30 | Chambers William M | Macerator |
US4477028A (en) * | 1982-05-27 | 1984-10-16 | Hughes John H | Comminuter with coacting discharge screening device |
US4892258A (en) * | 1986-05-09 | 1990-01-09 | Hughes John H | Comminuter for solid material |
US5046671A (en) * | 1989-01-18 | 1991-09-10 | Hughes John H | Spring-loaded teeth for comminuter rolls |
EP0629142A1 (en) * | 1992-02-18 | 1994-12-21 | Kady International | Apparatus and method for treatment of waste water sludge |
US5425507A (en) * | 1993-03-03 | 1995-06-20 | Stumpff; Roger | Method and apparatus for comminuting materials |
DE19503266A1 (en) * | 1995-02-02 | 1996-08-08 | Suma Sondermaschinen Gmbh | Grinder for installation in pipelines |
US6013183A (en) * | 1998-08-05 | 2000-01-11 | Paradigm Environmental Technologies Inc. | Method of liquefying microorganisms derived from biological wastewater treatment processes |
US6444124B1 (en) | 1999-08-27 | 2002-09-03 | Theodore Onyeche | System and method for improved treatment of wastewater |
US9475059B2 (en) | 2013-03-15 | 2016-10-25 | Pentair Flow Technologies, Llc | Cutting blade assembly |
CN106391329A (en) * | 2016-11-10 | 2017-02-15 | 中国农业大学 | Centrifugal drier for vegetable seeds |
US11161121B2 (en) | 2019-05-10 | 2021-11-02 | Jung Pumpen Gmbh | Cutting blade assembly |
US11560894B2 (en) | 2016-04-26 | 2023-01-24 | Pentair Flow Technologies, Llc | Cutting assembly for a chopper pump |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2012680A (en) * | 1933-05-22 | 1935-08-27 | John W Hammes | Garbage disposal device |
US2496359A (en) * | 1946-03-30 | 1950-02-07 | Sulzer Ag | Pump disintegrator |
US3013736A (en) * | 1958-02-26 | 1961-12-19 | Gen Motors Corp | Domestic appliance |
-
1970
- 1970-10-23 US US83346A patent/US3658262A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2012680A (en) * | 1933-05-22 | 1935-08-27 | John W Hammes | Garbage disposal device |
US2496359A (en) * | 1946-03-30 | 1950-02-07 | Sulzer Ag | Pump disintegrator |
US3013736A (en) * | 1958-02-26 | 1961-12-19 | Gen Motors Corp | Domestic appliance |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3738581A (en) * | 1971-10-12 | 1973-06-12 | Oberdorfer Foundries Inc | Macerating pump with means for preventing blockages |
US4275849A (en) * | 1973-05-25 | 1981-06-30 | Chambers William M | Macerator |
US4477028A (en) * | 1982-05-27 | 1984-10-16 | Hughes John H | Comminuter with coacting discharge screening device |
US4892258A (en) * | 1986-05-09 | 1990-01-09 | Hughes John H | Comminuter for solid material |
US5046671A (en) * | 1989-01-18 | 1991-09-10 | Hughes John H | Spring-loaded teeth for comminuter rolls |
EP0629142A4 (en) * | 1992-02-18 | 1997-02-12 | Kady International | Apparatus and method for treatment of waste water sludge. |
EP0629142A1 (en) * | 1992-02-18 | 1994-12-21 | Kady International | Apparatus and method for treatment of waste water sludge |
US5425507A (en) * | 1993-03-03 | 1995-06-20 | Stumpff; Roger | Method and apparatus for comminuting materials |
DE19503266A1 (en) * | 1995-02-02 | 1996-08-08 | Suma Sondermaschinen Gmbh | Grinder for installation in pipelines |
DE19503266C2 (en) * | 1995-02-02 | 2003-06-18 | Suma Sondermaschinen Gmbh | Shredding device for installation in pipelines |
US6013183A (en) * | 1998-08-05 | 2000-01-11 | Paradigm Environmental Technologies Inc. | Method of liquefying microorganisms derived from biological wastewater treatment processes |
US6444124B1 (en) | 1999-08-27 | 2002-09-03 | Theodore Onyeche | System and method for improved treatment of wastewater |
US9475059B2 (en) | 2013-03-15 | 2016-10-25 | Pentair Flow Technologies, Llc | Cutting blade assembly |
US10670020B2 (en) | 2013-03-15 | 2020-06-02 | Pentair Flow Technologies, Llc | Cutting blade assembly |
US11655821B2 (en) | 2013-03-15 | 2023-05-23 | Pentair Flow Technologies, Llc | Cutting blade assembly |
US11560894B2 (en) | 2016-04-26 | 2023-01-24 | Pentair Flow Technologies, Llc | Cutting assembly for a chopper pump |
CN106391329A (en) * | 2016-11-10 | 2017-02-15 | 中国农业大学 | Centrifugal drier for vegetable seeds |
US11161121B2 (en) | 2019-05-10 | 2021-11-02 | Jung Pumpen Gmbh | Cutting blade assembly |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ZIMPRO INC.,WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STERLING DRUG INC., A DE CORP.;REEL/FRAME:004337/0879 Effective date: 19841127 Owner name: ZIMPRO INC., MILITARY ROAD ROTHSCHILD, WI 54474 Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:STERLING DRUG INC., A DE CORP.;REEL/FRAME:004337/0879 Effective date: 19841127 |
|
AS | Assignment |
Owner name: M&I MARSHALL & ILSLEY BANK Free format text: SECURITY INTEREST;ASSIGNOR:ZIMPRO INC., MILITARY ROAD, ROTHSCHILD, WI 54474, A CORP OF WI;REEL/FRAME:004370/0126 Effective date: 19850121 |
|
AS | Assignment |
Owner name: M&I MARSHALL & ILSLEY BANK Free format text: SECURITY INTEREST;ASSIGNOR:ZIMPRO INC.;REEL/FRAME:004857/0873 Effective date: 19850117 |