US3547410A - Mixing device - Google Patents

Mixing device Download PDF

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Publication number
US3547410A
US3547410A US755618A US3547410DA US3547410A US 3547410 A US3547410 A US 3547410A US 755618 A US755618 A US 755618A US 3547410D A US3547410D A US 3547410DA US 3547410 A US3547410 A US 3547410A
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US
United States
Prior art keywords
liquid
reservoir
tube
overflow tube
baffle plate
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
US755618A
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English (en)
Inventor
Leendert Johannes Van De Windt
Johannes Jansen
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.)
Brooks Instrument BV
Original Assignee
Brooks Instrument BV
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
Application filed by Brooks Instrument BV filed Critical Brooks Instrument BV
Application granted granted Critical
Publication of US3547410A publication Critical patent/US3547410A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • B01F21/20—Dissolving using flow mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/10—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components
    • B01F25/104—Mixing by creating a vortex flow, e.g. by tangential introduction of flow components characterised by the arrangement of the discharge opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/316—Injector mixers in conduits or tubes through which the main component flows with containers for additional components fixed to the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/821—Combinations of dissimilar mixers with consecutive receptacles

Definitions

  • Jenkins Attorney-Paul & Paul ABSTRACT Device for mixing solid or fluid materials or the like in a main liquid, said device comprising a vertically arranged substantially cylindrical reservoir for receiving the materials to be mixed, the bottom of the reservoir being provided with a nozzle, which is connected to a supply for said main liquid and positioned to spray said main liquid in substantially horizontal, and, in view of the vertical wall of the reservoir, tangential direction, an overflow tube, the upper end of which being provided with one or more inlet openings, being arranged in the reservoir together with a helical shaped baffle plate the fore edge of which, as seen in the direction of rotation of the liquid flow, is lying higher than the maximum liquid level and the back edge below the lowest inlet point of the overflow tube, the supply for said main liquid being formed by a branch of a delivery pipe of a liquid pump, the liquid from below the overflow tube being sucked off by a jet pump being mounted, after the branch, in the delivery pipe, the liquid level in the reservoir being controlled by means of a bypass tube with a valve
  • the invention relates to a device for mixing solid or fluid materials or the like in a main liquid for obtaining a mixture, or a solution, or a suspension, or the like, said device comprising a vertically arranged substantially cylindrical reservoir for receiving the materials to be mixed.
  • a stirring device is arranged in the reservoir for mixing the main liquid with the solid or fluid materials. Then the mixture is, by means of a pump, sucked from the reservoir for being fed to the location where it is used.
  • the stirring device and its drive form a considerable part of the costs of the total mixing device.
  • certain parts of the stirring device must, in order to obtain a reliable device, be executed in corrosion resistant materials, while especially with the working up of fire-risky materials, the drive of the stirring device, which, in most instances, comprises an electromotor, has be to explosionproof.
  • a further objection of the use of a stirring device is that air bubbles, or generally gas bubbles, can land in the liquid and are carried away with the mixture. This can give difficulties when using the mixture, while the capacityof the suction pump will also'be affected.
  • the invention now aims at removing the above-mentioned objections and for this purpose provides a device, which is characterized in that in the reservoir, near its bottom, and eventually at the locations suitable for this, at least one nozzle has been arranged connected to a supply for said main liquid and positioned to spray said main liquid in substantially horizontal and, in view of the vertical wall of the reservoir, tangential direction.
  • an overflow tube has been placed the upper end of which is provided with one or more inlet openings, in such a way, that the liquid in the reservoir follows a helical path with an upwardly directed pitch.
  • a helical shaped baffle plate running substantially radially to the wall of the reservoir has been mounted.
  • the pitch of this baffle seen in the direction of rotation of the flow of the liquid is oppositely directed to the pitch of the flow of the liquid while, seen in the direction of rotation, the fore edge of the baffle plate lies higher than the maximum liquid level and the baffle plate extends below the minimum liquid level and somewhat beyond the lowest inlet point of the overflow tube.
  • the inlet opening in the overflow tube is formed by a vertical slot in said tube whereby even with a varying liquid level a correct discharge of the liquid out of the reservoir and into the overflow tube is guaranteed.
  • the baffle plate In order to insure that the liquid flowing into the overflow tube, has as smooth a flow characteristics as possible, i.e. shows as little whirl as possible, the baffle plate, as seen in the direction of rotation of the flow of the liquid, for a portion of its length is spaced from the wall of thereservoir. Above the baffle plate, just after the inlet opening in the overflow tube, a partition plate which is substantially vertically has been arranged which extends between the wall of the reservoir and the overflow tube and extends above the maximum liquid level.
  • the free rim of the baffle plate is provided with a downwardly reversed part.
  • the baffle plate thus not only causes a downwardly directed velocity component, but at the same time causes the flow to be more concentrated around the overflow tube.
  • an area with a more quiet flow originates above the baffle plate and between'the wall of the reservoir and the overflow tube.
  • a final close mixing will take place because the liquid, which at last lands above the baffle plate, at first must move downwardly and must flow around the reversed part.
  • the nozzle is connected with a branch of a delivery pipe of a liquid pump and the liquid from below the overflow tube is sucked off by a liquid jet pump mounted, after the branch, in the delivery pipe.
  • the liquid level does not exceed the highest edge of the baffle plate and does not sink under the inlet opening in the overflow tube.
  • the invention now provides in the overflow tube a level control device, which device operates a valve present in a bypass tube, running from a point of the delivery pipe, positioned before the water jet pump, to the mixing reservoir.
  • liquid level, in the mixing reservoir, must with a maximum capacity of the water jet pump, slowly rise.
  • the valve in the bypass tube will close completely or partly.
  • the liquid supply from the nozzle is less than the minimum suction capacity of the water jet pump.
  • the level control device and the valve operated by it then can be of a simple type, by which the chance of disturbances is minimal.
  • the bypass tube can be connected with the wall of the reservoir at a point above the baffle plate and in such horizontal and tangential direction that the liquid coming out of the bypass tube mainly has the same flow direction as the main flow in the reservoir.
  • the bypass tube it is of course also possible to connect the bypass tube with a nozzle, working parallel with the main nozzle in the reservoir.
  • FIG. 1 shows a perspective view of a mixing device according to the invention, with which the wall of the reservoir and of the overflow tube has partly been left out;
  • FIG. 2 shows a vertical section over a device according to disc 3, and is provided with the longitudinal slot 5. All round the overflow tube 4 the baffle plate 6 is present, which, as appears more especially from FIG. 1, has a helical shape. The fore edge 7 of the baffle plate 6 lies above the maximum liquid level and the back edge 8 below the minimum liquid level.
  • the baffle plate 6 extends itself over the whole distance between the overflow tube 4 and the shell 2, but after some distance the edge of the baffle plate comes clear from the shell 2 and is, from that location on, provided with a reversed rim 9, which runs on the to the back edge 8.
  • the back edge 8 ends at some distance beyond the longitudinal slot in the tube 4.
  • a plate 10 is mounted which runs between the overflow tube 4 and the wall 2 of the reservoir 1 and ends above the maximum liquid level.
  • a nozzle 11 At the bottom of the reservoir a nozzle 11 has, in about tangential direction, been mounted, from which nozzle liquid is sprayed into the reservoir, such that said liquid mainly follows a flow direction as indicated with the arrow P.
  • the nozzle 11 is by means of a piping 12 with a valve 13 in it, connected with the delivery pipe 14 of a pump 15, as has schematically been shown in FIG. 3.
  • a jet pump 16 is present after the branch of the piping 12, which pump is connected with an outlet opening 17, which is present in the bottom 3 of the reservoir but within the periphery of the overflow tube 4.
  • the jet pump 16 consequently sucks the liquid treated in reservoir 1, in the direction of the arrow Q.
  • the jet pump 16 the liquid treated in the reservoir 1, is mixed with the liquid that has not yet been treated, but has been supplied immediately from the pump 15.
  • a bypass tube 18 is mounted between the delivery pipe 14 and the reservoir 1.
  • a hand-operated regulation stop valve 19 is present and a solenoid valve 20, that is operated by means of a level-control device 21, which is present in the overflow tube 4,
  • the level-control device 21 is protected by a tube 22, mounted in the overflow tube 4 and at its upper and lower side stands in open connection with said tube. Owing to this the level-control device 21 is not immediately hit by the liquid flowing via the longitudinal slot 5 into the overflow tube 4 It is clear that the level-control device 21 works such, that, when the liquid level decreases under a certain value.
  • the solenoid valve is opened, by which extra liquid is supplied to the reservoir 1.
  • Piping I8 discharges closely behind the plate 10 into the reservoir 1, so that the liquid coming from the tube 18 will hardly take part in the mixing process in the reservoir, but almost immediately will flow into the overflow tube 4.
  • the tube 18 and the valves 19 and 20 must be dimensioned such, that the liquid level then rises slowly, so that after some time the level-control device 21- again will close the valve 20.
  • the liquid level then decreases again and the cycle described above repeats.
  • a proportionally working device can be applied, owing to which the liquid level will fluctuate very little, but in most instances such an arrangement, which entails considerable more costs, is superfluous.
  • Device for mixing solid materials, liquids or the like in a main liquid for obtaining a mixture, or a solution, or a suspension or the like, said device comprising a vertically arranged substantially cylindrical reservoir for receiving the materials to be mixed, characterized in that in the reservoir, near its bottom, at least one nozzle has been arranged connected toa supply for said main liquid and positioned to spray said main liquid in substantially horizontal and, in view of the vertical wall of the reservoir, tangential direction, that in the'reservoir an overflow tube has been placed the upper end of which being provided with at least one inlet opening, in such a way, that the liquid in the reservoir follows an upward helical path, that at the top of the reservoir all round a part of the periphery of the overflow tube a helical-shaped baffle plate running substantially radially to the wall of the reservoir has been mounted the pitch of which, seen in the direction of rotation of the flow of the liquid, is oppositely directed to the flow of the liquid while, seen in this direction of rotation, the fore edge of the
  • Device characterized in that the baffle plate, seen in the direction of rotation of the liquid flow, after some distance, is lying clear from the wall of the reservoir and that above the plate, just after the discharge opening in the overflow tube, a partition plate running substantially vertically has been arranged which extends itself between the wall of the reservoir and the overflow tube and which runs on to above the maximum liquid level.
  • Device characterized in that the free rim of the baffle plate, lying opposite to the wall of the reservoir, is provided with a downwardly reversed part.
  • Device characterized in that the nozzle is connected with a branch of a delivery pipe of a liquid pump and that the liquid from below the overflow tube is sucked off by a water jet pump being mounted, after the branch, in the delivery pipe.
  • Device characterized in that in the overflow tube a level-control device has been arranged, which device operates a valve present in a bypass tube running from a point of the delivery pipe, positioned before the water jet pump, to the mixing reservoir.
  • bypass tube is connected with the wall of the reservoir in a point positioned above the baffle plate and in such a horizontal, tangential direction, that the liquid coming from the bypass tube mainly has the same flow direction as has the main flow in the reservoir.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
US755618A 1968-04-05 1968-08-27 Mixing device Expired - Lifetime US3547410A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6804893A NL6804893A (enExample) 1968-04-05 1968-04-05

Publications (1)

Publication Number Publication Date
US3547410A true US3547410A (en) 1970-12-15

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ID=19803252

Family Applications (1)

Application Number Title Priority Date Filing Date
US755618A Expired - Lifetime US3547410A (en) 1968-04-05 1968-08-27 Mixing device

Country Status (5)

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US (1) US3547410A (enExample)
DE (1) DE1917676A1 (enExample)
FR (1) FR1594639A (enExample)
GB (1) GB1217096A (enExample)
NL (1) NL6804893A (enExample)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701055A (en) * 1986-02-07 1987-10-20 Fluid Dynamics, Inc. Mixing apparatus
US6186657B1 (en) * 1996-05-31 2001-02-13 Kevin Johan Fuchsbichler Apparatus and method for mixing particulate solids or gels in a liquid
EP1313667A4 (en) * 2000-07-27 2005-01-19 Arch Chem Inc DIFFUSER OF CHEMICAL
CN109200406A (zh) * 2018-05-02 2019-01-15 北京启顺京腾科技有限责任公司 一种智能化医用儿童雾化器
CN116282575A (zh) * 2023-03-21 2023-06-23 厦门汇科天工净水材料有限公司 一种复合碳源的生产制作方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2932470B1 (fr) * 2008-06-17 2011-10-28 Spcm Sa Procede de traitement de boues minerales et equipement pour la mise en oeuvre du procede
CN108693187B (zh) * 2018-06-21 2023-12-19 上海工程技术大学 一种用于散纤维连续取样的动态循环装置及其使用方法
CN115703676A (zh) * 2021-08-16 2023-02-17 青岛青建蓝谷新型材料有限公司 一种高渗透性堵漏用水泥浆料制备方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4701055A (en) * 1986-02-07 1987-10-20 Fluid Dynamics, Inc. Mixing apparatus
US6186657B1 (en) * 1996-05-31 2001-02-13 Kevin Johan Fuchsbichler Apparatus and method for mixing particulate solids or gels in a liquid
EP1313667A4 (en) * 2000-07-27 2005-01-19 Arch Chem Inc DIFFUSER OF CHEMICAL
CN109200406A (zh) * 2018-05-02 2019-01-15 北京启顺京腾科技有限责任公司 一种智能化医用儿童雾化器
CN116282575A (zh) * 2023-03-21 2023-06-23 厦门汇科天工净水材料有限公司 一种复合碳源的生产制作方法
CN116282575B (zh) * 2023-03-21 2023-09-12 厦门汇科天工净水材料有限公司 一种复合碳源的生产制作方法

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Publication number Publication date
NL6804893A (enExample) 1969-10-07
FR1594639A (enExample) 1970-06-08
GB1217096A (en) 1970-12-23
DE1917676A1 (de) 1969-10-30

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