US3828444A - Device for uniformly adjusting the moisture content in a compacted mass - Google Patents

Device for uniformly adjusting the moisture content in a compacted mass Download PDF

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Publication number
US3828444A
US3828444A US00366070A US36607073A US3828444A US 3828444 A US3828444 A US 3828444A US 00366070 A US00366070 A US 00366070A US 36607073 A US36607073 A US 36607073A US 3828444 A US3828444 A US 3828444A
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US
United States
Prior art keywords
conduit
mass
plunger
perforated plate
cylinder
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
Application number
US00366070A
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English (en)
Inventor
E Kopp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Werner and Pfleiderer GmbH
Original Assignee
Werner and Pfleiderer GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19722235255 external-priority patent/DE2235255C/de
Application filed by Werner and Pfleiderer GmbH filed Critical Werner and Pfleiderer GmbH
Application granted granted Critical
Publication of US3828444A publication Critical patent/US3828444A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D11/00—Solvent extraction
    • B01D11/02—Solvent extraction of solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
    • B30B9/06—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams co-operating with permeable casings or strainers
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0091—Elimination of undesirable or temporary components of an intermediate or finished product, e.g. making porous or low density products, purifying, stabilising, drying; Deactivating; Reclaiming

Definitions

  • the device comprises a press, the cylinder of which is closed at one end by a removable cover mounting on its inner side a perforated plate and into which extends a power driven ram or plunger mounting on its face wall a second perforated plate.
  • the mass of nitrocellulose to be processed is fed into the cylinder space between the two perforated plates.
  • the perforated plate on the cover communicates with a conduit for feeding alcohol into the cylinder and the other perforated plate with a discharge conduit. These two conduits are interconnected by a conduit.
  • a valve is included in the feed conduit upstream of the connection thereof to the discharge conduit and a second valve is included in the interconnecting conduit.
  • alcohol is added via the feed conduit by opening the valve in the feed conduit and closing the valve in the interconnecting conduit.
  • valve in the feed conduit is closed and the valve in the interconnecting conduit is opened and, finally, the mass in the cylinder is compacted by activating the plunger.
  • the water is pressed out during the compacting of the mass is discharged through the now open discharge conduit.
  • the present invention relates to a device for dewatering a pliable mass and replacing the removed water by another liquid; more particularly, the invention relates to a device for dewatering a pliable mass of nitrocellulose and replacing the removed water by alcohol.
  • a power driven ram or plunger slidable in the cylinder of the press mounts on its face wall a perforated plate which communicates with a discharge conduit and the cylinder is closed by a cover at its end opposite to the end through which the plunger is extended into the cylinder.
  • This cover mounts on its inside a perforated plate which communicates with a liquid discharge conduit.
  • Pressure devices of this kind are operated by feeding alcohol into the mass of nitrocellulose to be processed and by dewatering the mass by compacting the same, i.e., by a two-stage operation.
  • German Patent No. 1,164,298 a device in which a press has a single cylinder in which a ram'or plunger is slidably driven by the power drive of the press.
  • the cylinder is closed at its end opposite to the end through which the plunger extends into the cylinder by a pivotal cover which communicates with a feedline for feeding alcohol into the cylinder.
  • the liquid, such as water, pressed out from the nitrocellulose or other mass during the compacting of the same is discharged via a perforated plate mounted on the face wall of the plunger and communicating with a discharge conduit.
  • a more specific object of the invention is to provide a novel and improved device of the general kind abovereferred to which permits dewatering of the mass and feeding of another liquid such as alcohol into the same by a one-stage operation.
  • the plate on the cover' communicates with a feed conduit and the plate on the plunger with a discharge conduit.
  • a third conduit interconnects these two conduits.
  • a valve is included in the feed conduit upstream of the connection thereof when the third conduit and a second valve is'included in the third conduit.
  • the press is operated by first opening the valve in the feed conduit and closing the valve in the interconnecting third conduit for feeding alcohol into the cylinder space.
  • the valve in the feed conduit is then closed and the valve in the interconnecting conduit is opened.
  • the mass in the cylinder is compacted by power driving the plunger, the water then expelled from the mass is discharged from the cylinder through the third conduit.
  • a cylinder 1 of a press open at both ends.
  • the upper end of the cylinder is closable by a cover plate 2 which can be mounted in any convenient manner, i.e., it may be hinged to the cylinder.
  • a ram or plunger 3 is slidable in the cylinder and is power driven by a piston 4.
  • the mass is compacted by pressure applied to it in response to an upward movement of piston 4 and thus of plunger 3 as is indicated by an arrow P.
  • a pressure cone 7 is formed which is tapered in the direction of the applied pressure.
  • the density in this mass forming the cone is highest at its base and decreases gradually toward the apex of the cone.
  • Cover 2 mounts on its side facing plunger 3 a perforated plate 5. Similarly, the side of the plunger facing cover 2 mounts a perforated plate 6. Perforated plate 5 communicates with a duct 8 in cover 2 and perforatedplate 6 communicates with a duct 9 extending through plunger 3. Both ducts are interconnected via pipes 8 and 9' respectively to a conduit 10 for collecting liquid released from the mass when the same is subjected to the aforedescribed pressure and for discharging such collected liquid through conduit 10 as it is indicated by an arrow.
  • duct 8 in cover 2 is connected via pipe 8 with a feed pipe 11 for feeding liquid so that when a control valve 12 included in pipe 11 upstream of the connection with conduit 10 is opened and a corresponding control valve 13 in conduit 10 is closed liquid can be fed into the cylinder space 1' containing mass 7 before the mass is compacted, such liquid being usually alcohol.
  • valve 12 is closed and valve 13 is opened to permit discharge of squeezed-out liquid, usually water, via perforated plate 5 and duct 8 in cover plate 2.
  • squeezed-out liquid usually water
  • a device for controlled displacement of water contained in a pliable mass of nitrocellulose by alcohol comprising:
  • a pressure plunger slidably extending into the cylinder from the open end thereof for defining within the cylinder a receiving space of variable volume between the plunger and the closure member for receiving a pliable mass of nitrocellulose, the pres sure stroke of the plunger being toward the top end of the cylinder;
  • a first perforated plate mounted on the side of the closure member facing the plunger;
  • a first control valve included in said feed conduit for controlling the feed of alcohol into said space
  • a second control valve included in said interconnecting conduit for selectively closing the flow of pressed out water through said interconnecting conduit
  • opening of the first valve and closing of the second valve establishing a connection for feeding alcohol into said space through the first perforated plate and closing of the first valve and opening of the second valve connecting both perforated plates to the interconnecting third conduit, displacement of the plunger toward said closure member correspondingly reducing said receiving space causing water and alcohol to be pressed out of the mass, said pressedout water and alcohol being discharged at both ends of mass through said perforated plates.
  • closure member is a cover plate removably attached to the respective end of the cylinder, said first conduit communicating with the first perforated plate through said cover plate.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US00366070A 1972-07-19 1973-06-01 Device for uniformly adjusting the moisture content in a compacted mass Expired - Lifetime US3828444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722235255 DE2235255C (de) 1972-07-19 Kolbenpresse zur Verdrängung des in Nitrozellulose enthaltenen Wassers

Publications (1)

Publication Number Publication Date
US3828444A true US3828444A (en) 1974-08-13

Family

ID=5850970

Family Applications (1)

Application Number Title Priority Date Filing Date
US00366070A Expired - Lifetime US3828444A (en) 1972-07-19 1973-06-01 Device for uniformly adjusting the moisture content in a compacted mass

Country Status (6)

Country Link
US (1) US3828444A (de)
CH (1) CH548853A (de)
FR (1) FR2236653B1 (de)
GB (1) GB1388334A (de)
IT (1) IT998249B (de)
SE (1) SE392837B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050493A (en) * 1990-03-06 1991-09-24 The United States Of America As Represented By The Secretary Of Interior Bi-directionally draining pore fluid extraction vessel
US5862746A (en) * 1996-02-20 1999-01-26 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Apparatus for reducing the water content of water-containing brown coal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2109559A (en) * 1935-02-04 1938-03-01 Phoenix Hosiery Company Liquid extracting means and method
US2221806A (en) * 1938-01-20 1940-11-19 Evarts G Loomis Dehydrating press and method of dehydrating
US2331126A (en) * 1942-05-14 1943-10-05 Evarts G Loomis Dehydrating press
DE1164298B (de) * 1962-01-17 1964-02-27 Wasagchemie Ag Kolbenpresse zur Verdraengung des Wassers aus wasserfeuchter Nitrocellulose durch Alkohole

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1631037A (en) * 1921-10-28 1927-05-31 William B Kochenderfer Hydraulic press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2109559A (en) * 1935-02-04 1938-03-01 Phoenix Hosiery Company Liquid extracting means and method
US2221806A (en) * 1938-01-20 1940-11-19 Evarts G Loomis Dehydrating press and method of dehydrating
US2331126A (en) * 1942-05-14 1943-10-05 Evarts G Loomis Dehydrating press
DE1164298B (de) * 1962-01-17 1964-02-27 Wasagchemie Ag Kolbenpresse zur Verdraengung des Wassers aus wasserfeuchter Nitrocellulose durch Alkohole

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5050493A (en) * 1990-03-06 1991-09-24 The United States Of America As Represented By The Secretary Of Interior Bi-directionally draining pore fluid extraction vessel
US5862746A (en) * 1996-02-20 1999-01-26 Maschinenfabrik J. Dieffenbacher Gmbh & Co. Apparatus for reducing the water content of water-containing brown coal

Also Published As

Publication number Publication date
DE2235255A1 (de) 1972-12-28
FR2236653B1 (de) 1979-06-22
IT998249B (it) 1976-01-20
SE392837B (sv) 1977-04-25
CH548853A (de) 1974-05-15
GB1388334A (en) 1975-03-26
FR2236653A1 (de) 1975-02-07

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