US3899159A - Device for treating substances consisting of at least one vessel and one or more stirring members in each vessel - Google Patents

Device for treating substances consisting of at least one vessel and one or more stirring members in each vessel Download PDF

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Publication number
US3899159A
US3899159A US478166A US47816674A US3899159A US 3899159 A US3899159 A US 3899159A US 478166 A US478166 A US 478166A US 47816674 A US47816674 A US 47816674A US 3899159 A US3899159 A US 3899159A
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US
United States
Prior art keywords
vessel
injection pipe
stirring
substances
members
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
US478166A
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English (en)
Inventor
Constant Johan Nauta
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Nautamix Patent AG
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Nautamix Patent AG
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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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B01F27/951—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis with at least one stirrer mounted on the sun axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/95—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with stirrers having planetary motion, i.e. rotating about their own axis and about a sun axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/114—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections
    • B01F27/1144—Helically shaped stirrers, i.e. stirrers comprising a helically shaped band or helically shaped band sections with a plurality of blades following a helical path on a shaft or a blade support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2321—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes having different inclinations, e.g. non parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
    • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
    • B01F27/2324—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes planetary

Definitions

  • mixing granular, pulverulent or pasty substances and/or liquids comprising a vessel with a vertical axis of symmetry, at least one stirring member provided in said vessel, each member at its upper respectively bottom end situated eccentrically in the vessel, whereas at least its upper end is supported in the free end of a member having its opposite end rotatably supported in the vertical axis of symmetry of the vessel, while means are provided for rotating each stirring member about its own axis and simultaneously about the vertical axis of symmetry of the vessel, at least one combined system for locally producing a vortex motion in the surrounding substances to be treated and injecting at the same time a substance into said surrounding substances, arranged in that portion of the bottom of the vessel beyond the reach of the or each stirring member.
  • the de vice has a combined system consisting of an injection pipe rotatably supported in the bottom of the vessel and provided with at least one longitudinal channel closed at its upper end, at least one spray member opening into the vessel and at least one pair of stirring members provided on said injection pipe.
  • said spray-respectively stirring members are arranged one below the other seen from the side of the closed upper end of the injection pipe as follows: a pair of stirring members, a spray member, a second pair of stirring members and a second spray member etc.
  • the stirring members as well as the spray members are preferably adjustable in the longitudinal direction of the injection pipe in that case means provided for securing the members in any fixed position on the injection pipe.
  • stirring member consists of an elongated member provided with a bent free end.
  • each pair of stirring members is arranged on a head supported suchlike in the wall of the injection pipe that it can be rotated as well as fixed against rotation, consequently the bent free end of each stirring member being adjustable over 360 in respect of the horizontal plane.
  • the openings of the upper spray members are directed perpendicular or almost perpendicular to the longitudinal direction of the injection pipe, the openings of the lower spray member directed upwards in respect of said longitudinal direction of the injection pipe.
  • My invention finally aims to provide in or in the vicinity of the bottom of the vessel means enabling the fluidisation of the substances in the vessel by means of a gas, f.i. air at the time said substances move in the room in the lower portion of the vessel, said means preferably consisting of an air seal having a downwardly directed outlet slit said seal arranged between the cone-shaped bottom of the vessel respectively the bottom side of the combined system.
  • FIG. 1 shows an axial section through the lower portion of the vessel with a combined system arranged in the bottom of the vessel, the stirring members only represented in outline;
  • FIG. 2 represents diagrammatically a plan view of the combined system of FIG. 1.
  • each stirring member 2 and 2a is supported at the upper end of its shaft 3, respectively 3a in the free end of a supporting arm (not shown) extending from the central vertical axis of the vessel radially and horizontally towards the wall 4 of the vessel 1 in a manner already known per se for a device of the kind described.
  • the inside end of each supporting arm is supported in a member rotatably supported in the vertical axis of symmetry of the vessel 1.
  • the lower end of each stirring member 2 respectively 2a is situated eccentrically in respect of the vertical axis of symmetry of the vessel 1 free from the bottom 5 of the vessel 1.
  • a combined system 6 is arranged in the vertical axis of symmetry of the vessel 1.
  • the combined system 6 comprises an injection pipe 7 closed at its upper end and by means of twin roller bearings 8 supported rotatably in a central bore 9 extending centrically through the bottom 5 of the vessel 1.
  • a labyrinth packing 10 On either side of each twin roller bearing 8 is arranged a labyrinth packing 10.
  • On the part of the injection pipe 7 extending upwardly from the bottom 5 and seen from the upper end of said part are arranged a head 11 with stirring members 12, a spray member 13, a head 14 with stirring members 15 and a spray member 16.
  • the lower end of the spray member 16 engages circumferentially by means of a bore provided in said member the top end of the bottom 5. Since all stirring members and spray members are each adjustable in the longitudinal direction of the injection pipe 7, means (not shown) are provided to fix said members in any position, it is possible to provide an annular passage 18 between the wall 17 of the spray member 16 respectively, the top end of the bottom 5 as well as between the bottom of the spray member 16 and the upper side of the bottom 5, a channel 19 extending through the bottom 5 connected to said passage 18.
  • Circumferentially equidistantly spaced three pairs of stirring members 12 and three pairs of stirring members 15 are arranged on the injection pipe 7, the stirring members of each pair arranged one above the other, the drawing showing only one pair of stirring members 12 and one pair of stirring members 15.
  • the stirring members 12 or 15 belonging to one single pair of stirring members are at one end fixedly secured in a head 20 or 21, respectively, each head rotatably supported in the wall of the associated holder 11 or 14, respectively, means (not shown) provided to secure the holder in any position on the injection pipe 7.
  • the free ends of the stirring members 12 and 15, respectively, are bent.
  • the spray member 13 is by means of channels in the wall of the injection pipe 7 in open communication with the channel 22 provided in the injection pipe 7, said member 13 showing openings to the outside perpendicular to the longitudinal direction of the injection pipe.
  • the spray member 16 is likewise by means of channels provided in the wall of the injection pipe 7 in open communication with the channel 22, however, the circular outlet slit 23 of the spray member 16 is directed obliquely upwards in respect of the longitudinal direction of the injection pipe 7.
  • a rope pulley 24 is arranged on one end of the injection pipe 7 protruding from the underside of the bottom 5, while a bracket 25 secured to the bottom supports an electric motor 26 enabling to rotate via-a rope 27 respectively the rope pulley 24 the injection pipe 7 together with all stirring members and spray members arranged thereon.
  • a liquid head 28 having its outlet extending into the injection pipe 7, while a supply pipe (not shown) for a liquid can be connected to the stationary casing of said liquid head 28.
  • each of the stirring members 2 and 2a are rotated about its own axis in a direction forcing a flow of the substances to be treated from the bottom upwards in the vessel 1, thereafter falling down from the top side of the vessel to the bottom side. Since simultaneously the stirring members 2 and 2a rotate about the vertical axis of symmetry of the vessel 1 (see the arrows in FIG. 2) the whole mass of the substances to be treated is set into a move inside the vessel.
  • a feed pipe preferably for compressed air is connected to the channel 19 extending through the bottom 5, providing an air seal preventing dust from penetrating into the member 6, moreover fluidising at'the same time the substances filling the bottom portion inside the vessel.
  • the combined system 6 is rotated about its own axis at a comparatively high speed preferably in a direction opposite the rotating direction of the stirring members 2 and about their own axis (see arrows in FIG. 2), so that the stirring members 12 and 15 assist to a great extent in producing a vortex motion in the substances.
  • the stirring members 12 and 15 By adjusting the stirring members 12 and 15 in respect of the direction of the bent free ends of said members in relationship with the nature of the substances to be treated it becomes possible to obtain optimal ratios for mixing the injected liquid together with the particles of the solid substances to be treated in which at the same time a vortex is produced, enabling also an excellent coating effect and casquo a granulation of the substances.
  • Constructive details of the device may be varied within the scope of the invention. For instance two separate channels can be provided in the injector pipe each of said channels in open communication with a corresponding sprayer and provided with a liquid head, consequently enabling two separate liquids to be injectcd. Also provisions can be arranged to spray solid or gaseoius substances into thejvessel- What I claim is: i
  • Device for treating substances e g. mixing granular, pulverulent or pasty substances and/or liquids, comprising a vessel with a vertical axis of symmetry, at least one stirring member in said vessel, said member being situated at its upper and bottom end eccentrically in said vessel, at least said upper end being supported in the free end of a member with opposite end rotatably supported in the vertical axis of symmetry of said vessel, means for rotating each stirring member about its own axis and simultaneously about the vertical axis of symmetry of said vessel, at least one combined system for locally producing a vortex motion in the surrounding substances to be treated and injecting at the same time a substance into said surrounding substances, ar-
  • said combined system comprising an injection pipe rotatably supported in the bottom of the vessel and provided with at least one longitudinal channel closed at its upperend, at least one spray memberopening into said vessel, and
  • said stirring member comprises anelongated member .provided with a bent free end.
  • t i v 7 Device according to claim 6, wherein a pair of stirring members are arranged on a head supported in the wall of the injection pipe so that it can be rotated as well as fixed against rotation, the bent free end of each stirring member being adjustable over 360. with respect to the horizontal plane.
  • Device includingmeans substantially in-the vicinity of the bottom of the vessel for fluidisation of the substances in the vessel by'means of a gas, said substances moving in the room in the lower portion of said vessel.
  • said means in the bottom of the vessel comprises an air seal having a downwardly directed outletslit, said seal being arranged between the bottom of the vessel and the bottom side of the combined system the bottom of the vessel being cone-shaped.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
US478166A 1973-06-15 1974-06-10 Device for treating substances consisting of at least one vessel and one or more stirring members in each vessel Expired - Lifetime US3899159A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7308397.A NL157510B (nl) 1973-06-15 1973-06-15 Menginrichting.

Publications (1)

Publication Number Publication Date
US3899159A true US3899159A (en) 1975-08-12

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ID=19819096

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Application Number Title Priority Date Filing Date
US478166A Expired - Lifetime US3899159A (en) 1973-06-15 1974-06-10 Device for treating substances consisting of at least one vessel and one or more stirring members in each vessel

Country Status (8)

Country Link
US (1) US3899159A (enrdf_load_stackoverflow)
JP (1) JPS5235909B2 (enrdf_load_stackoverflow)
DE (1) DE2425727C3 (enrdf_load_stackoverflow)
DK (1) DK145073C (enrdf_load_stackoverflow)
GB (1) GB1469316A (enrdf_load_stackoverflow)
IN (1) IN141835B (enrdf_load_stackoverflow)
NL (1) NL157510B (enrdf_load_stackoverflow)
SE (1) SE419825B (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4437766A (en) 1981-03-18 1984-03-20 Werner & Pfleiderer Mixer having two feed worms defining upper and lower mixing regions with an intermediate equilibrium zone
US4511255A (en) * 1984-04-30 1985-04-16 Dci, Inc. Clean-in-place agitator assembly
US4588301A (en) * 1982-06-29 1986-05-13 Alfred Bolz Conical screw mixer
US4599363A (en) * 1979-07-13 1986-07-08 Lever Brothers Company Method for wetting and dispersing powders
US4997285A (en) * 1988-09-17 1991-03-05 Gebruder Lodige Maschinenbaugesellschaft Mbh Machine for handling pourable, pasty, and/or fluid materials with a built-in disintegrator
US20040238664A1 (en) * 2001-09-28 2004-12-02 Tiziano Faccia Truck for shredding and mixing products for zootechnical use
US20040245359A1 (en) * 2001-09-28 2004-12-09 Tiziano Faccia Truck for shredding and mixing products for zootechnical use
CN102302911A (zh) * 2010-12-29 2012-01-04 黑龙江龙煤矿业集团股份有限公司双鸭山分公司虹焱热电有限公司 粉煤灰双轴搅拌机防粘螺旋推轴及螺旋叶片
CN102532504A (zh) * 2011-12-16 2012-07-04 化学工业第二设计院宁波工程有限公司 一种适用于二氧化碳-环氧丙烷共聚物制备的合成反应釜
US20140042067A1 (en) * 2011-03-30 2014-02-13 J.F. Knauer Industrie-Elektronik Gmbh Mixing apparatus for crushing sludge
WO2015169458A1 (de) * 2014-05-06 2015-11-12 Veit Herbert Vorrichtung zur aufnahme und abgabe von mischbaren materialien
CN108607441A (zh) * 2018-03-26 2018-10-02 王紫蓉 一种畜牧养殖用猪饲料混合装置
CN114768617A (zh) * 2022-06-17 2022-07-22 广东卫康有害生物防制有限公司 病媒生物防制药物组合物行星桨预搅拌混合装置及方法
US20220305448A1 (en) * 2020-07-21 2022-09-29 Hefei General Machinery Research Institute Co., Ltd Integrated production system for ternary material

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61220723A (ja) * 1985-03-23 1986-10-01 Nippon Synthetic Chem Ind Co Ltd:The 多機能化された処理装置
DE19723325C1 (de) * 1997-06-04 1999-01-28 Alhard Ruberg Flüssigkeitszugabevorrichtung und Chargenmischer zum Mischen trockener und/oder angefeuchteter Feststoffe und Flüssigkeitszugabe
DE102016100147A1 (de) 2016-01-05 2017-07-06 Ireks Gmbh Werkzeug für eine Mischvorrichtung und Mischvorrichtung
DE102016100153A1 (de) 2016-01-05 2017-07-06 Ireks Gmbh Mischvorrichtung und Mischwerkzeug
CN112055610B (zh) * 2018-03-22 2022-10-11 巴斯夫涂料有限公司 调整搅拌机构参数同时的涂料组合物制备
CN111841366A (zh) * 2020-08-20 2020-10-30 东北林业大学 一种寒区聚氨酯混凝土修复材料的制备装置及方法
CN115253798A (zh) * 2022-09-27 2022-11-01 江苏雅博动物健康科技有限责任公司 一种天然宠物饲料的加水混合设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345063A (en) * 1939-11-13 1944-03-28 Nauta Johannes Ewardus Mixing apparatus, especially adapted for mixing pulverized materials
US2668764A (en) * 1949-10-14 1954-02-09 Johannes E Nauta Method and device for conching a chocolate mass and the like
US2967695A (en) * 1957-06-25 1961-01-10 Constant J Nauta Coupling joint
US3614070A (en) * 1969-05-26 1971-10-19 Baker Perkins Inc Multiple orbiting screw mixing apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1130252A (fr) * 1954-05-07 1957-02-04 Dispositif pour l'homogénéisation d'une matière en poudre ou en grains
DE1607776A1 (de) * 1967-11-29 1970-07-09 Kranz Gmbh Karl Vorrichtung zum Mischen pulverfoermiger Stoffe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345063A (en) * 1939-11-13 1944-03-28 Nauta Johannes Ewardus Mixing apparatus, especially adapted for mixing pulverized materials
US2668764A (en) * 1949-10-14 1954-02-09 Johannes E Nauta Method and device for conching a chocolate mass and the like
US2967695A (en) * 1957-06-25 1961-01-10 Constant J Nauta Coupling joint
US3614070A (en) * 1969-05-26 1971-10-19 Baker Perkins Inc Multiple orbiting screw mixing apparatus

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599363A (en) * 1979-07-13 1986-07-08 Lever Brothers Company Method for wetting and dispersing powders
US4437766A (en) 1981-03-18 1984-03-20 Werner & Pfleiderer Mixer having two feed worms defining upper and lower mixing regions with an intermediate equilibrium zone
US4588301A (en) * 1982-06-29 1986-05-13 Alfred Bolz Conical screw mixer
US4511255A (en) * 1984-04-30 1985-04-16 Dci, Inc. Clean-in-place agitator assembly
US4997285A (en) * 1988-09-17 1991-03-05 Gebruder Lodige Maschinenbaugesellschaft Mbh Machine for handling pourable, pasty, and/or fluid materials with a built-in disintegrator
US20040238664A1 (en) * 2001-09-28 2004-12-02 Tiziano Faccia Truck for shredding and mixing products for zootechnical use
US20040245359A1 (en) * 2001-09-28 2004-12-09 Tiziano Faccia Truck for shredding and mixing products for zootechnical use
US6983902B2 (en) * 2001-09-28 2006-01-10 Tiziano Faccia Zootechnical use shredding and mixing apparatus for a truck
US7322537B2 (en) * 2001-09-28 2008-01-29 Tiziano Faccia Truck for shredding and mixing products for zootechnical use
CN102302911A (zh) * 2010-12-29 2012-01-04 黑龙江龙煤矿业集团股份有限公司双鸭山分公司虹焱热电有限公司 粉煤灰双轴搅拌机防粘螺旋推轴及螺旋叶片
US10227249B2 (en) 2011-03-30 2019-03-12 Ecolab Usa Inc. Mixing apparatus for crushing sludge
US20140042067A1 (en) * 2011-03-30 2014-02-13 J.F. Knauer Industrie-Elektronik Gmbh Mixing apparatus for crushing sludge
US9517959B2 (en) * 2011-03-30 2016-12-13 Ecolab Usa Inc. Mixing apparatus for crushing sludge
US10486996B2 (en) 2011-03-30 2019-11-26 Ecolab Usa Inc. Mixing apparatus for crushing sludge
CN102532504A (zh) * 2011-12-16 2012-07-04 化学工业第二设计院宁波工程有限公司 一种适用于二氧化碳-环氧丙烷共聚物制备的合成反应釜
WO2015169458A1 (de) * 2014-05-06 2015-11-12 Veit Herbert Vorrichtung zur aufnahme und abgabe von mischbaren materialien
US10632434B2 (en) 2014-05-06 2020-04-28 Herbert VEIT Apparatus for accommodation and dispensing of miscible materials having discharge opening provided with a displacer apparatus
CN108607441A (zh) * 2018-03-26 2018-10-02 王紫蓉 一种畜牧养殖用猪饲料混合装置
US20220305448A1 (en) * 2020-07-21 2022-09-29 Hefei General Machinery Research Institute Co., Ltd Integrated production system for ternary material
US12053750B2 (en) * 2020-07-21 2024-08-06 Hefei General Machinery Research Institute Co., Ltd Processing system with agitated nutsche filter and conical double helix dryer
CN114768617A (zh) * 2022-06-17 2022-07-22 广东卫康有害生物防制有限公司 病媒生物防制药物组合物行星桨预搅拌混合装置及方法

Also Published As

Publication number Publication date
DE2425727C3 (de) 1982-02-04
JPS5235909B2 (enrdf_load_stackoverflow) 1977-09-12
JPS5028061A (enrdf_load_stackoverflow) 1975-03-22
DK145073B (da) 1982-08-23
GB1469316A (en) 1977-04-06
DK309974A (enrdf_load_stackoverflow) 1975-02-10
SE7407433L (enrdf_load_stackoverflow) 1974-12-16
SE419825B (sv) 1981-08-31
DK145073C (da) 1983-01-24
DE2425727A1 (de) 1975-01-09
NL157510B (nl) 1978-08-15
IN141835B (enrdf_load_stackoverflow) 1977-04-23
NL7308397A (enrdf_load_stackoverflow) 1974-12-17
DE2425727B2 (de) 1981-06-25

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