US3664096A - Process and apparatus for suspending particles in a liquid - Google Patents

Process and apparatus for suspending particles in a liquid Download PDF

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Publication number
US3664096A
US3664096A US16015A US3664096DA US3664096A US 3664096 A US3664096 A US 3664096A US 16015 A US16015 A US 16015A US 3664096D A US3664096D A US 3664096DA US 3664096 A US3664096 A US 3664096A
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US
United States
Prior art keywords
enclosure
bin
liquid
particles
receiver
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Expired - Lifetime
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US16015A
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English (en)
Inventor
Pierre Lejeune
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Neyrpic BMB SA
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Neyrpic BMB SA
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Application filed by Neyrpic BMB SA filed Critical Neyrpic BMB SA
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Publication of US3664096A publication Critical patent/US3664096A/en
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper

Definitions

  • ABSTRACT Particles to be suspended in a liquid are fed into an enclosure maintained at less than atmospheric pressure. In the enclosure the particles are subjected to mixing and then centrifuging to assist the vacuum in removal of air from the particles. The particles leaving the centrifuge are subjected to liquid jets to assist in removal of air and the particles then fall onto a layer of the suspending liquid and thereafter in homogeneous suspension in the liquid leave the enclosure.
  • the present invention relates to a process for forming a homogeneous suspension of particles in a liquid and apparatus for carrying out the process.
  • the present invention relates more particularly, for example, to providing aqueous suspensions of cellulosic fibers or textile fibers for feeding machines for the continuous manufacture of paper or non-woven textiles.
  • granular or fibrous particles to be suspended in a liquid are obtained from natural or synthetic product by known procedures to provide the desired granulometry or length characteristics of the fibers.
  • the phenomenon of superficial tension the value of which depends upon the material of the particle and that of the liquid, prevents the liquid from taking the place of the air in the interstices and from completely covering the particle. Numerous air bubbles thus remain attached to the particles which hinders a homogeneous suspension and favors agglomeration of the particles.
  • the air bubbles give the particles a different apparent density depending upon the relative amount of the gases retained by the particles.
  • the present invention corrects these inconveniences and facilitates the elimination of gas intimately associated with the particles.
  • the particles are stirred in an enclosure maintained at a sub-atmospheric pressure and then, while within the enclosure, the particles are projected onto the surface of a moving layer of the suspension liquid.
  • apparatus for carrying out this process comprising an airtight enclosure connected to a vacuum pump, feed apparatus for the particles located outside of the enclosure and including an airtight distributor passing through the wall of the enclosure, a storage bin disposed within the enclosure beneath the distributor for the particles, an agitator for the particles including at its lower end a rotating distributor or centrifuge, a receiver having a large opening within the enclosure beneath the distributor or centrifuge and concentric with the bin, the receiver having at least one feed tuyere for the suspension liquid and at least one tuyere for removal of the liquid-particle suspension.
  • FIG. 1 is an axial sectional view of a preferred embodiment of apparatus in accordance with the invention for placing textile fibers in suspension in water;
  • FIG. 2 is an axial sectional view in enlarged detail of the lower part of the bin shown in FIG. 1.
  • the apparatus is mounted on base 1 and includes an airtight enclosure 2, preferably cylindrical, closed at its upper end by cover 3.
  • a truncated conical bin 4 is mounted beneath cover 3 in enclosure 2.
  • a motor with reduction gear 5 is mounted on cover 3 and has a vertical drive shaft 6 passing through bin 4.
  • Horizontal radial arms 7 are mounted on shaft 6 and have paddles 8 at their extremities to agitate the material in the bin.
  • Cover 3 also mounts bins 10 in which is stored in dry state the fibers to be placed in suspension.
  • a wide mouthed basin 15 having a deep central part 16 and the boundaries of the basin form a deep annular outlet 17.
  • Feed tuyere 18 is connected to the central part 16 through a distributor made of a thick plate 19 provided with numerous vertical cylindrical openings 20. Annular outlet 17 is connected to evacuation tuyeres 21.
  • a caisson 25 within enclosure 2 and surrounding bin 4 has an opening in its lower surface which is completely closed by bin 4 and by an airtight joint 26.
  • Caisson 25 provides within enclosure 2 an annular space 27 closed at its lower portion by a perforated annular wall 28. Space 27 is connected to a vacuum pump by a duct 29.
  • headers 30 are provided with liquid under pressure by duct 32 passing through the wall of enclosure 2.
  • shaft 6 of the agitator carries at its lower end rotating disc 35 disposed slightly below the lower open end of bin 4 and disc 35 has radial lands 36.
  • the interior of enclosure 2 is maintained at less than atmospheric pressure on the order of 0.05 to 0.2 bars by the vacuum pump connected to duct 29.
  • Caisson 25 decreases the interior volume of enclosure 2 subject to vacuum.
  • the fibers stored in the bins 10 are introduced into bin 4 in controlled amounts by the motors 12.
  • the fibers introduced in bin 4 are thus suddenly subjected to a vacuum which dilates the volumes of air enclosed at normal pressure in the fibers causing the adherence of the air to the fibers to become unstable.
  • the mechanical action of the agitator in bin 4 then facilitates the freeing of the air particles.
  • the particles are again subjected to a mechanical action under a sub-atmospheric pressure freeing the air therein when they are centrifuged by the disc or turbine 35 and, again, by the shock of the liquid particles projected by the pulverizers 31.
  • the fibers therefore arrive in contact with the suspension liquid without air particles adhering thereto and their dispersion in the suspension liquid is homogeneous.
  • the difference in level between the evacuation tuyeres 21 and the surface of the suspension of liquid and fibers in annular outlet 17 equalizes the difference in pressure between the interior and the exterior of enclosure 2.
  • the liquid in headers 30 is not necessarily the same liquid as the suspension liquid and may be, regardless of the suspension liquid, water, water vapor, a softening agent, and may be at a different temperature from that of the liquid introduced by duct 18.
  • Apparatus for suspending particles in a liquid comprising a substantially airtight enclosure, means for drawing a partial vacuum within said enclosure, feed apparatus for the particles exterior of said enclosure, distributing means between said feed apparatus and said enclosure passing through the wall of said enclosure and providing an air seal between said enclosure and said feed apparatus, a bin disposed within said enclosure beneath said distributing means, an agitator in said bin, a rotating distributor at the lower end of said agitator outside said bin, a wide mouth receiver within said enclosure and spaced from and beneath said rotating distributor concentric with said bin, at least one feed tuyere means for supplying suspension liquid to said receiver and at least one evacuation tuyere for the particle-liquid suspension flowing from said receiver.
  • Apparatus as described in claim 1 including at least one header for pulverizing fluid within said enclosure above said rotating distributor and concentric with said bin, the pulverizing fluid being directed toward the surface of said receiver from said header.
  • said receiver including a wide mouth basin, said feed tuyere discharging through the center of said basin and a peripheral gutter concentric with said basin receiving liquid-particle suspension overflow therefrom said evacuation tuyere opening into said gutter.

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  • Paper (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
US16015A 1969-03-07 1970-03-03 Process and apparatus for suspending particles in a liquid Expired - Lifetime US3664096A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6906506A FR2036249A5 (enrdf_load_stackoverflow) 1969-03-07 1969-03-07

Publications (1)

Publication Number Publication Date
US3664096A true US3664096A (en) 1972-05-23

Family

ID=9030320

Family Applications (1)

Application Number Title Priority Date Filing Date
US16015A Expired - Lifetime US3664096A (en) 1969-03-07 1970-03-03 Process and apparatus for suspending particles in a liquid

Country Status (10)

Country Link
US (1) US3664096A (enrdf_load_stackoverflow)
AT (1) AT298217B (enrdf_load_stackoverflow)
BE (1) BE746374A (enrdf_load_stackoverflow)
ES (1) ES377217A1 (enrdf_load_stackoverflow)
FI (1) FI51772C (enrdf_load_stackoverflow)
FR (1) FR2036249A5 (enrdf_load_stackoverflow)
GB (1) GB1254825A (enrdf_load_stackoverflow)
IL (1) IL34007A (enrdf_load_stackoverflow)
SE (1) SE360273B (enrdf_load_stackoverflow)
YU (1) YU33343B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101116A (en) * 1975-10-08 1978-07-18 Motan Gesellschaft Mit Beschrankter Haftung Apparatus for mixing granulated and/or pulverous materials
US4577973A (en) * 1983-02-24 1986-03-25 Luciano Occelli Method and device for mixing under vacuum mixtures used in dental, goldsmith fields or the like
US4784496A (en) * 1986-01-30 1988-11-15 Moulinex, Societe Anonyme Appliance for preparing mayonnaise and similar sauces
US5582644A (en) * 1991-12-17 1996-12-10 Weyerhaeuser Company Hopper blender system and method for coating fibers
US7678210B1 (en) 2004-03-08 2010-03-16 The United States Of America As Represented By The Secretary Of The Navy Injection loading of highly filled explosive suspensions
US7883263B1 (en) * 2010-08-30 2011-02-08 Wenger Manufacturing, Inc. Preconditioner for extrusion systems
CN101513596B (zh) * 2009-02-19 2011-10-05 中国海洋石油总公司 一种固液喷淋混合装置
CN106313510A (zh) * 2016-10-13 2017-01-11 河南龙璟科技有限公司 一种3d打印机的混料装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5335298B1 (enrdf_load_stackoverflow) * 1971-07-24 1978-09-26
US4239396A (en) * 1979-01-25 1980-12-16 Condor Engineering & Manufacturing, Inc. Method and apparatus for blending liquids and solids
ES2233860T3 (es) 2001-08-17 2005-06-16 Netzsch-Feinmahltechnik Gmbh Dispositivo y procedimiento para mezclar un solido con un liquido.
DE10163397B4 (de) * 2001-12-21 2005-10-13 Netzsch-Feinmahltechnik Gmbh Vorrichtung und Verfahren zum Vermischen eines Feststoffs mit einer Flüssigkeit

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1095463A (en) * 1910-01-14 1914-05-05 Gen Electric Apparatus for removing air from water.
US1511238A (en) * 1924-10-14 Method eor treating material
US1907548A (en) * 1928-09-25 1933-05-09 Paper Patents Co Process of subjecting fibers to the action of gases
US1920107A (en) * 1927-01-24 1933-07-25 Abilene Cotton Oil Company Process and apparatus for treating cotton seeds and other grain
US2299022A (en) * 1941-02-06 1942-10-13 Luther M Kinard Air separator
US2336017A (en) * 1940-12-28 1943-12-07 Kellogg M W Co Accumulator for finely divided solids
US2614656A (en) * 1949-08-15 1952-10-21 Rotareaed Corp Deaerating a suspension of papermaking stock
US2614652A (en) * 1951-08-13 1952-10-21 Research Corp Electrical precipitator
US3076501A (en) * 1956-11-08 1963-02-05 Escher Wyss Ag Apparatus for treating fibrous materials in the production of cellulose or semi-cellulose
US3174313A (en) * 1960-02-02 1965-03-23 Dorr Oliver Inc Treatment tower for paper pulp
US3502305A (en) * 1967-08-16 1970-03-24 Grun Kg Mas Fab Geb Method of and apparatus for adding liquid to pulverulent or granular materials

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1511238A (en) * 1924-10-14 Method eor treating material
US1095463A (en) * 1910-01-14 1914-05-05 Gen Electric Apparatus for removing air from water.
US1920107A (en) * 1927-01-24 1933-07-25 Abilene Cotton Oil Company Process and apparatus for treating cotton seeds and other grain
US1907548A (en) * 1928-09-25 1933-05-09 Paper Patents Co Process of subjecting fibers to the action of gases
US2336017A (en) * 1940-12-28 1943-12-07 Kellogg M W Co Accumulator for finely divided solids
US2299022A (en) * 1941-02-06 1942-10-13 Luther M Kinard Air separator
US2614656A (en) * 1949-08-15 1952-10-21 Rotareaed Corp Deaerating a suspension of papermaking stock
US2614652A (en) * 1951-08-13 1952-10-21 Research Corp Electrical precipitator
US3076501A (en) * 1956-11-08 1963-02-05 Escher Wyss Ag Apparatus for treating fibrous materials in the production of cellulose or semi-cellulose
US3174313A (en) * 1960-02-02 1965-03-23 Dorr Oliver Inc Treatment tower for paper pulp
US3502305A (en) * 1967-08-16 1970-03-24 Grun Kg Mas Fab Geb Method of and apparatus for adding liquid to pulverulent or granular materials

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101116A (en) * 1975-10-08 1978-07-18 Motan Gesellschaft Mit Beschrankter Haftung Apparatus for mixing granulated and/or pulverous materials
US4577973A (en) * 1983-02-24 1986-03-25 Luciano Occelli Method and device for mixing under vacuum mixtures used in dental, goldsmith fields or the like
US4784496A (en) * 1986-01-30 1988-11-15 Moulinex, Societe Anonyme Appliance for preparing mayonnaise and similar sauces
US5582644A (en) * 1991-12-17 1996-12-10 Weyerhaeuser Company Hopper blender system and method for coating fibers
US7678210B1 (en) 2004-03-08 2010-03-16 The United States Of America As Represented By The Secretary Of The Navy Injection loading of highly filled explosive suspensions
CN101513596B (zh) * 2009-02-19 2011-10-05 中国海洋石油总公司 一种固液喷淋混合装置
US7883263B1 (en) * 2010-08-30 2011-02-08 Wenger Manufacturing, Inc. Preconditioner for extrusion systems
US20120052174A1 (en) * 2010-08-30 2012-03-01 Wenger Manufacturing, Inc. Preconditioner for extrusion systems
US8944672B2 (en) * 2010-08-30 2015-02-03 Wenger Manufacturing, Inc. Preconditioner for extrusion systems
CN106313510A (zh) * 2016-10-13 2017-01-11 河南龙璟科技有限公司 一种3d打印机的混料装置

Also Published As

Publication number Publication date
GB1254825A (en) 1971-11-24
BE746374A (fr) 1970-07-31
ES377217A1 (es) 1972-06-01
YU33343B (en) 1976-10-31
IL34007A0 (en) 1970-05-21
AT298217B (de) 1972-04-25
FI51772B (enrdf_load_stackoverflow) 1976-12-31
SE360273B (enrdf_load_stackoverflow) 1973-09-24
FI51772C (fi) 1977-04-12
DE2010189B2 (de) 1972-07-27
DE2010189A1 (de) 1971-02-25
YU50970A (en) 1976-04-30
IL34007A (en) 1972-12-29
FR2036249A5 (enrdf_load_stackoverflow) 1970-12-24

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