DE1517697A1 - Device for dewatering sludge and fiber suspension - Google Patents

Description

Device buk dewatering of sludge and faeer soles

The invention relates to a device for dewatering sludge and vaser slurries, which has many advantages in comparison with devices known for the same purpose, of which the following are mentioned: small dimensions
2ο Gentle treatment of the slurry, which is a cleaner

Wastewater results
3ο Low power requirement

4o avoidance of the so-called knot formation of the mass, that the caking of the mass su lump, welohes caused by rotating parts in the pressure sonβ will, d. ho in the rope of the device in which the drained Mass is susanmengedrttckt.

The invention is based on a device «which has a conveying

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derecnneoke has _f, which is arranged in a perforated cylinder, which surrounds the sonβokβ and old an inlet opening for the slurry to be dewatered and an outer opening for the dehydrated mass capital letters lato

The invention is characterized by the features specified in claim 1 marked o

You invention will be described in the following based on the drawing, the one embodiment in side view and partially in section represents

A screw conveyor 1 is rotatably arranged in a bearing 2 and is provided with a shaft 3 on which a drive wheel (not shown) for driving the tendon can be placed. The corner of the son is surrounded by a perforated cylinder 4 which lies relatively close to the screw threads of the screw. The cylinder 4 is surrounded by a substantially conical Klsenblecfagehäuse 5, which has a flange 6 at its wide end and another flange 7 at its narrow bottom. The housing 5 has an inlet opening 8 tUi the slurry at its wide edges. In its lower part this is

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Housing 5 "provided with an outlet opening 9 fttr for waste water, d. b. for the liquid which sas the Slurry is removed. From small volumes dee debäaeee 5 There is an outlet 10 in the flange 7.

The housing 5 with the cylinder 4 is through an array of Piston rods 11 carried, which are attached to the Flaneob 6 " The piston rods 11 are slidably guided in openings in an end wall 12 of the bearing 2. The layer 2 is also bit a further end wall 13 at other ends and provided with one or more connecting rods 14, which the end walls " connect with each other.

The piston rods 11 are bit pistons 15 connected in cylinders 16 can be moved

Each cylinder 16 has an inlet opening 17 for the supply of Compressed air into the cavity at the front of the piston and: a further inlet opening 18 for the supply of compressed air in the cavity at the back of the piston. Hobt depicted Pipes are connected to these inlet openings, and these Pipes connect the openings bit of a pressurized air source (not shown) "The pipes are old valves so that" when air at a suitable pressure enters the cavities in the cylinder

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16 is inserted, the feed tubes are closed can"

Since β bearing 2 1st is provided with a short sleeve 19, the-through an opening in the wall 12 engages and in the rear end of the perforated cylinder 4 is fitted.

At its front end is the screw conveyor 1 with a Shaft journal 20 provided, the one at its outer end Plansch 21 carries · The shaft journal 20 is vqb a Buohee surrounded, within which it is rotatable, the Buohee having a protruding collar 23 which forms the outer band of the plan view 21 encompasses o

When the device is in operation, the screw conveyor rotates ausο Sine slurry to be dewatered is through the inlet port 8 is fed. The slurry is passed through the screw conveyor is transported forwards (to the right in the drawing) As the slope decreases, the slurry is gradually compressed, causing sewage or others in the slurry The liquid contained is pressed out through the perforations of the cylinder 4 and flows off through the opening 9 ο The remaining Hasse is after reohts on the

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Let opener 10 »! pressed and then pressed out the last one The ringsobllts swlsofaen the edges of the outlet opening 10 and the socket 22 is relatively narrow so that the ifaase at Your Durohgen «duroh the bing room 24 in front of the screw threads the screw 1 is compressed more and more. The crowd, which finally through the Ringachllts and through the outlet opening 10 is pressed out, therefore has a relatively low moisture content

When the RingschlitB, through which the Maeee demanded to the outside is constant, the moisture content of the mass depends on the one hand on the moisture content of the opening 8 performed slurry from and sum others from the per unit of time suggested amount of attention.

Because of the pneumatic cylinder 16 with the piston 15, the cylinder 4 and the flange 7 are however in the axial direction in eye movable on the screw conveyor 1, and the Ringechlitt «As above the socket 22 and the walls of the outlet opening 10 has no constant size, the air pressure in the cylinders 16 On both rare occasions the piston 15 should be set so that, if there is no dehydrated mass in the tree 24, the RingBchlita at the outlet opening 10 is essentially closed is·

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When drained matter accumulates in tree 24 * results there is a pressure in the axial direction on the part of the flange 7 »which is surrounded by the cylinder 4, whereby the goose Device including the cylinder 4, the housing 5 »the flanges 6 and 7 and the openings 8 and 9 to the right is moved. Daduroh opens the ring slot on the Outlet opening 10 so that Hasse is squeezed out through the slot can be ο

By suitably designing the pneumatic devices 15x16 and by connecting sufficiently large buffer chambers to the feed pipe 17 and 18 can be achieved »that the duroh the outlet opening 10 printed out Maese an Im essentially constant moisture content which is independent of the moisture content supplied to the opening 8 en slurry and regardless of the per unit of time supplied amount ο

With the device according to the invention it is possible To change the moisture content of the pressed mass ο If the air pressure in the cylinders 16 in front of the pistons 15 is made much greater than the air pressure behind the pistons, Of course, the moisture content of the dehydrated mass is lower than if the air pressure in front of the pistons

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Pressure behind the piston only slightly exceeds ο

When the Maeee steps through the exit 24, she will between the walls of the cylinder 4 and the Buohee 22 pressed Babel, the Buohee 22 stops, while the shaft journal 20 and the flange 21 continue their rotation within the socket « set · This is very advantageous, «as it is prevented» that the mass "usanmen" in lumps or so-called knots b & okft causing a blockage in the ring-shaped Auslaßeohlit «could result from this design of the device the mass is also treated more gently »resulting in cleaner wastewater.

- patent claims -

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Claims (1)

- β - no-et-10 claim 1. Device earn dewatering of sludge and fiber uptake bit of a screw conveyor, which is rotatably arranged in a perforated cylinder, which encloses the hole, and old an inlet opening for the soling and with an outlet opening for the ssntw & sserts mass _v thereby gekenneeiohnet _f that the screw conveyor (1) is stationary in the axial direction in Besug on a bearing (2) carrying the screw, and that the cylinder (4) «with its inlet opening and its outlet opening in BeBUg on the screw (1) and the bearing (2) is movable in the axial direction and under the influence of a spring force, which strives in a manner known per se to keep the annular outlet opening (10) after the screw as small as possible and that the screw follows Type of arm is self-supporting at its "end adjacent to the outlet opening and only supported by a bearing at its" opposite end " 2 · Door direction according to claim 1, characterized in that the perforated cylinder is a bushing (19) away from the outlet opening 909835/1207 applies, which protrudes from the bearing (2), and wipe the the end wall (12) of the bearing adjacent to the perforated cylinder and the mdwend (6) lying behind the layer the cylinder (4) surrounding the housing (5) remains, duroh the Maaae that between the cylinder (4) and the Bush (19) emerges, can drain 3 «Torriohtung according to one of the previously shrill speech daduroh labeled in seiebnet, that the free end of the screw conveyor (1) ₄ daa the Auslaflöffnung (10) 1st benaobbart as Wellensapfen is formed (20), that a bushing (22) provided on this Wellensapfen is that the outlet opening swisofaen the uppermost end (23) of this socket and the band of an annular opening in the south wall (7) of the cylinder (4) is formed and that the shaft journal (20) is rotatable in the socket (22) so that the bush does not take part in the rotation of the screw conveyor (1) * 4. Device according to claim 3, characterized in that the outermost band (23) of the socket (22) is designed as a collar which has a flansoh (21) on the shaft journal (20) uaaohliefit, and that the socket aa transition swiaohen de "collars and their" main part in a ring 909835/1207 - 10 - no-mt-10 sets let9 with the stepped area on the inside of the flange (21) to prevent the bushing (22) from sliding off the shaft journal (20) 909835/1207