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WO2013096967A1 - Système de puits d'alimentation autodiluant à flux variable - Google Patents

Système de puits d'alimentation autodiluant à flux variable Download PDF

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Publication number
WO2013096967A1
WO2013096967A1 PCT/US2012/071635 US2012071635W WO2013096967A1 WO 2013096967 A1 WO2013096967 A1 WO 2013096967A1 US 2012071635 W US2012071635 W US 2012071635W WO 2013096967 A1 WO2013096967 A1 WO 2013096967A1
Authority
WO
WIPO (PCT)
Prior art keywords
slurry
feed
influent
mixing conduit
nozzle
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.)
Ceased
Application number
PCT/US2012/071635
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English (en)
Inventor
Timothy J. Laros
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.)
FLSmidth AS
Original Assignee
FLSmidth AS
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 FLSmidth AS filed Critical FLSmidth AS
Publication of WO2013096967A1 publication Critical patent/WO2013096967A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/02—Settling tanks with single outlets for the separated liquid
    • B01D21/04—Settling tanks with single outlets for the separated liquid with moving scrapers
    • B01D21/06—Settling tanks with single outlets for the separated liquid with moving scrapers with rotating scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2405—Feed mechanisms for settling tanks
    • B01D21/2411—Feed mechanisms for settling tanks having a tangential inlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2427—The feed or discharge opening located at a distant position from the side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/307—Passive control mechanisms without external energy, e.g. using a float
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters

Definitions

  • This invention relates to thickener/clarifier settling tanks used to separate liquid and solid components of an influent feed slurry and specifically relates to feedwell apparatus employed in such thickener/clarifiers to enhance the clarification process. More specifically, the invention relates to a feed dilution system and method that delivers a diluted solids slurry to a feedwell of a thickener or clarifier tank.
  • Thickener/clarifier tanks are used in a wide variety of industries to separate influent feed slurry comprising a solids, or particulate, containing fluid to produce a "clarified" liquid phase having a lower concentration of solids than the influent feed slurry and an underflow stream having a higher concentration of solids than the influent feed slurry.
  • Thickener/clarifier tanks conventionally comprise a tank having a floor and a continuous wall, which define a volume within which the clarification process takes place.
  • Thickener/clarifier tanks also include an influent feed pipe for delivering influent feed to the tank, an underflow outlet for removing settled solids from the tank and a fluid discharge outlet for directing clarified liquid away from the tank.
  • Thickener/clarifier settling tanks may also include a rake assembly having rake arms for sweeping along the floor of the tank, and may include an overflow launder or bustle pipe for collecting clarified liquid near the top of the tank.
  • Thickener/clarifier tanks of the type described operate by introducing an influent feed stream into the volume of the tank where the influent is retained for a period long enough to permit the solids to settle out by gravity from the fluid.
  • the solids that settle to the bottom of the tank produce a sludge bed near the bottom of the tank, which is removed through the underflow outlet.
  • Clarified liquid is formed at or near the top of the thickener/clarifier tank and is directed away from the tank for further processing or disposal.
  • Settling of solids may be enhanced in some applications by the addition of a flocculent or polymer that forms agglomerates that settle more readily.
  • an objective of fluid clarification is to enhance the settling process to achieve a high throughput of solids, and thereby enhance solids recovery.
  • a feedwell may be structured in a variety of ways, therefore, to create or enhance dissipation of energy in the influent feed.
  • the feedwell and influent feed pipe may be structured to introduce influent feed to the feedwell at two opposing directions and into an annular space, such as is disclosed in U.S. Pat. No. 4,278,541 to Eis, et al.
  • the influent feed pipe is incorporated into a feed slurry dilution system including a mixing conduit with a downstream end connected to the feedwell and an upstream end that receives both a slurry stream from a feed pipe and a diluting liquid via a pipe, an eductor type structure, or any other source.
  • the mixing conduit may take the form of a classical submerged pipe or tube or alternatively an open channel form in which a mixing zone is open to the atmosphere.
  • the feed pipe is provided at its outlet end, at the upstream end of the mixing conduit, with a nozzle usually having a circular outlet opening located proximate the upstream end of the mixing conduit.
  • a more specific object of the present invention is to provide such a feed slurry dilution system and/or associated method which provides a substantially constant degree of dilution of a feed stream entering a feedwell.
  • Another specific object of the present invention is to provide such a feed slurry dilution system and/or associated method which is easy and inexpensive to implement.
  • a related object of the present invention is to provide such a feed slurry dilution system and/or associated method which is easy and inexpensive to implement as a retrofit to feedwell assemblies of existing and operating thickener/clarifier/settling tanks.
  • the motive jet that is, the output stream of the feed pipe nozzle, at the upstream end of the mixing conduit, is regulated to have a substantially constant velocity, one is able to achieve a substantially constant degree of dilution of a feed stream entering a feedwell.
  • a feed slurry dilution system for a thickener or settling tank comprises, in accordance with the present invention, a slurry feed pipe provided with a nozzle attached to a downstream end of the feed pipe, where the nozzle has a variable orifice configured to provide an infeed slurry flow stream of substantially constant velocity.
  • the feed dilution system for the thickener or settling tank further comprises a mixing conduit, at least a portion of the nozzle being disposed proximate an upstream end of the mixing conduit, and a feedwell disposed inside the thickener or settling tank, a downstream end of the mixing conduit being functionally attached to the feedwell so that the mixing conduit communicates with the feedwell.
  • the nozzle has an outlet orifice portion made of resilient and flexible material such as rubber.
  • the nozzle may take the form an elastomeric check valve type nozzle, particularly a duckbill type nozzle.
  • the mixing conduit may be in the form of an open channel or a closed pipe, for instance, a submerged conduit.
  • the mixing conduit may have a variety of cross-sections; e.g., circular, oval, etc.
  • the mixing conduit may also have a rectangular cross-section with a pair of lower corners, the nozzle having an outlet opening configured to bias the infeed slurry flow stream to remove settled particles from the corners.
  • the feed slurry dilution system may also variously include an eductor type structure to facilitate the dilution of the incoming slurry feed stream.
  • the present invention also relates to associated method of conditioning a slurry feed stream flowing into the feedwell of a thickening or settling tank, where the tank includes a tank inlet system comprising an influent slurry feed pipe and orifice directing the influent slurry feed stream into a mixing conduit, the mixing conduit including a source of diluting liquid, which may also be sometimes referred to as dilutant or diluent, a bottom and leading to the feedwell.
  • a source of diluting liquid which may also be sometimes referred to as dilutant or diluent
  • the method of the present invention then comprises the steps of (a) flowing the influent slurry feed stream through the feed pipe and orifice into the mixing conduit and using the feed pipe orifice to shape the influent feed stream so that the influent feed stream has a substantially constant velocity on an output side of the orifice, (b) introducing a diluting liquid or otherwise diluting the
  • the method contemplates that using the feed pipe orifice includes changing or managing the shape and/or the opening size of the feed pipe orifice.
  • the feed pipe orifice may be provided in an elastomeric check valve type nozzle configured and arranged to shape the influent feed stream according to the method.
  • the nozzle may take the particular form of a duckbill type nozzle configured and arranged to shape the influent feed stream into a flattened cross-section.
  • the feed pipe orifice is made at least in part of resilient and flexible material configured and arranged to shape the influent feed stream according to the method.
  • the method preferably further comprises feeding a diluting liquid to the mixing conduit to mix with the influent slurry feed stream, wherein the using of the feed pipe orifice to shape the influent feed stream so that the influent feed stream has a constant velocity ensures a substantially uniform degree of dilution of the influent slurry feed stream by the diluting liquid.
  • the method may include the additional steps of (i) educting the flow of the diluting liquid into the mixing channel by way of transfer of momentum between the influent slurry feed stream and the diluting liquid, (ii) flocculating the educted diluting liquid, or flocculating the slurry feed stream and the diluting liquid within the mixing channel, and (iii) producing a substantially uniform solids concentration within the resulting diluted and mixed slurry feed stream flowing into the feedwell.
  • Changing or otherwise managing the shape and/or the opening size of the orifice in turn shapes the influent feed stream according to the method. It is to be noted that if a duckbill type variable-orifice nozzle is oriented with the elongate orifice dimension extending across the mixing conduit or channel, the influent slurry flow stream or slurry infeed stream is non-circular and flatter and thus broader across the width of the channel instead of a tubular stream flowing down the center of the mixing channel.
  • This flattened slurry infeed stream is more conducive to mixing the solids and dilution fluids together in an area closer to the dilution-liquid suction or eduction inlet of the mixing channel and that the flows are better mixed prior to the exit from the mixing channel, hence producing a more uniform solids concentration over the entire open channel as it enters the feedwell.
  • the nozzle may be rotatably, snap fit, bolted, or otherwise mounted to the feed pipe and it may be removable and/or replaceable.
  • the mixing conduit may take any number of forms, including that of an open or closed channel having a substantially rounded, v-shaped, rectangular or approximately rectangular cross- section with one or more sharp or rounded lower corners.
  • the outlet opening of the nozzle may be asymmetrically configured to bias the initial stream to remove settled particles from the corners of the mixing conduit.
  • a feedwell feed slurry dilution system provided with a variable orifice nozzle in accordance with the present invention helps keep an open channel system scoured and cleaned and allows for a variable incoming flow rate volume while the valve keeps the nozzle velocity more or less constant as the valve clamps down a bit as the flow rate decreases.
  • This is of particular benefit in generally rectangular open-channel type mixing conduits where the invention results not only in a more even or uniform mixing of diluting liquid in the slurry stream entering the feedwell from the mixing conduit, but also serves to prevent a buildup of particles along the lower corners of the mixing conduit.
  • FIG. 1 is a vertical sectional view of a thickener/clarifier tank having a center pier supporting a rotating sludge raking structure and a feed well assembly with a feed dilution system in accordance with the present invention.
  • FIG. 2 is a plan view of the thickener/clarifier tank of FIG. 1, taken on line II- II in FIG. 1.
  • FIG. 3 is a schematic perspective view of a feedwell assembly with a feed slurry dilution system in accordance with the present invention.
  • FIG. 4 is a schematic vertical cross-sectional view of the feed dilution system of FIG. 3.
  • FIG. 5 is a side view of a check valve type nozzle shown in FIG. 4 and utilizable in the feed dilution system and method of the present invention.
  • FIG. 6 is an end view of the check valve type nozzle of FIGS. 4 and 5, showing an outlet orifice in a closed, storage and transport configuration.
  • FIG. 7 is an end view of the check valve type nozzle of FIGS. 4-6, showing the outlet orifice of the nozzle in one configuration during operation of the feed dilution system of the present invention.
  • FIG. 8 is a view similar to FIG. 7, showing the outlet orifice of the nozzle in another configuration during operation of the feed dilution system of the present invention.
  • FIG. 9A is a top view of a retaining clamp for the check valve type nozzle of FIGS. 4-8.
  • FIG. 9B is a side view of the retaining clamp of FIG. 9A.
  • a thickener/clarifier comprises a continuously operating thickening/settling tank 20 wherein a sludge raking structure 10 is supported for rotation upon a center pier 11.
  • a drive mechanism 12 of any suitable known construction is mounted atop the pier providing the driving torque for the rake structure.
  • the pier also supports the inner end of an access bridge 13.
  • Rake structure 10 comprises a central vertical cage portion or cage 14 surrounding the pier 11, and rake arms of girder like construction extending rigidly from the cage.
  • Rake structure 10 has one pair of long rake arms 15 and 16 opposite to one another, and a pair of short rake arms 17 and 18 disposed at right angles thereto, all arms having sludge impelling or conveying blades 19 fixed to the underside thereof.
  • Rake structure 10 operates in a settling tank 20 to which a feed suspension or feed pulp is supplied through a feed dilution system 21 terminating in a cylindrical feedwell body 22 which surrounds the top end portion of the rake structure and is supported by pier 11.
  • Tank 20 may be of usual construction, comprising a bottom 24 of shallow inverted conical inclination, and formed with an annular sump 25 around the pier, to which settled solids or sludge are conveyed by rake structure 10.
  • Feed slurry dilution system 21 is connected at a downstream end to feedwell body 22.
  • Feedwell body 22 has an annular floor panel 34 (FIG. 2) with an inner edge 36 defining a circular opening 38 and an outer edge contiguous with a cylindrical sidewall 40 of the feedwell body.
  • Feed slurry dilution system 21 is connected to feedwell body 22 so as to deliver slurry stream 42 to flow along a circular path inside the feedwell body.
  • Slurry stream 42 has a substantially circular inner boundary located generally above inner edge 36 and a substantially circular outer boundary located adjacent feedwell sidewall 40. The inner and outer boundaries extend parallel to the path of the incoming slurry stream 42. As depicted in FIG. 3 and more schematically in FIG.
  • feed dilution system 21 includes a slurry feed pipe 44, a variable-orifice nozzle 46 attached to a downstream end of the feed pipe, a source of diluting liquid, in this case flow 66 from the generally more clarified zone of the thickener or settling tank, and a mixing conduit 48 in the form of an open channel having lower corners 49 (only one shown).
  • Feed dilution system 21 may be defined to further include feedwell body 22. At least a portion of nozzle 46 is disposed proximate an upstream end 50 of mixing conduit 48. A downstream end of mixing conduit 48 is functionally attached to feedwell sidewall 40 so that the mixing conduit communicates with the feedwell.
  • reference designation 52 represents a bed of settled solids in settling tank 20, pipe 54 being provided for removing the thickened underflow .
  • Nozzle 46 (FIG. 4) generally comprises a nozzle body 92 having an inlet end 94 and an outlet end 96, the outlet end being provided with an outlet opening or orifice 56 having a size or cross-sectional area that varies in accordance with the pressure in feed pipe 44.
  • the positioning of nozzle 46 relative to upstream end 50 of mixing conduit 48 may form an eductor structure for the diluting liquid, as generally shown in FIGS. 3 and 4 and/or also as generally described in U.S. Patent No. 5,389,250.
  • variable-orifice nozzle 46 may take the form of an elastomeric duck bill type check valve nozzle which is self regulating with respect to flow therethrough and self cleaning.
  • Nozzle 46 includes a cuff portion 102 at one end thereof having a substantially full round bore therethrough to resiliently slip over a downstream end of the feed pipe 44.
  • Nozzle 46 further includes a saddle portion 104 in a middle region of the nozzle and a substantially flat bill portion 106 at the downstream or outlet end of the nozzle.
  • Saddle portion 104 tapers from the substantially full round bore of cuff portion 102 to the substantially flat bill portion 106 thereby lending the nozzle a generally tapered cross-sectional shape.
  • Bill portion 106 is substantially flat and is provided with outlet opening or orifice 56 in the form of a slit.
  • outlet slit 56 is oriented substantially horizontally within the upstream or inlet end of mixing conduit 48.
  • outlet slit 56 may have an orientation in any suitable direction within the mixing conduit 48.
  • Saddle portion 104 of nozzle 46 directs fluid flow to the bill portion 106 and is resilient to sustain the shape thereof regardless of changes in the fluid flow conditions in feed pipe 44 and nozzle 46.
  • Bill portion 106 flexes to allow fluid flow through the substantially longitudinal outlet slit 56 therein and is resilient to vary the degree of opening of outlet slit 56 in conformity with the fluid pressure in feed pipe 44 and nozzle 46. More particularly, bill portion 106 flexes to vary the size or flow cross-section of outlet slit 56 so that a fluid stream 58 emerging from outlet slit 56 has an approximately constant velocity.
  • Outlet slit 56 may be of any suitable length, for instance, in a range of an inch or two to approximately the diameter of feed pipe 44.
  • Nozzle 46 may be made of any suitable flexible or elastomeric material, such as rubber, neoprene, ceramics, composites, etc. suitable for use in the feed and dilution process, and may include fabric or wire reinforcing 108 therein as required.
  • Nozzle 46 is self-cleaning since any build-up of material thereon will be removed by the flexing of the nozzle in response to changing fluid flow therethrough.
  • Nozzle 46 is self -regulating as the resiliency of the nozzle and the flexure of the nozzle in reaction to the fluid therearound will determine the degree of opening of outlet slit 56, that is, the size or flow cross-section thereof.
  • nozzle 46 is shown in an end view illustrating the substantially longitudinal slit 56 in the bill portion 106 and the reinforcement 108 thereof.
  • Bill portion 106 of nozzle 46 is substantially the width of the cuff portion 104 if the cuff portion were flattened from its substantially cylindrical shape of the full round bore configuration.
  • FIG. 7 shows a configuration of nozzle 46 and particularly outlet slit 56 when the fluid pressure inside feed pipe 44 is relatively low, that is, low relative to the fluid pressure 110 inside mixing conduit 48.
  • Internal spring stresses in bill portion 106 together with the external pressure 110 hold slit 56 in a nearly closed configuration at low pipe pressures so as to maintain the emerging fluid stream 58 approximately at a predetermined velocity.
  • FIG. 8 shows a configuration of nozzle 46 and particularly outlet slit 56 when the fluid pressure inside feed pipe 44 is higher.
  • the higher pressures force slit 56 to open to a wider configuration, in opposition to the internal spring-biasing stresses of bill portion 106 and the fluid pressure 110 inside mixing conduit 48, still maintaining the emerging fluid stream 58 approximately at the same
  • the internal spring-biasing stresses of bill portion 106 arise from the resiliency of nozzle 46 due the characteristics of the elastomeric material of the nozzle and any reinforcement material or means 108 located therein additionally keep the nozzle 46 in a closed configuration.
  • Clamp 260 comprises any suitable mechanically actuated clamp such as a screw 262 retained on one end of a clamp member 264 engaging a plurality of apertures in the clamp member 264. Since nozzle 46 resiliently engages the end of feed pipe 44, typically only a small clamping force is required to retain the nozzle 46 on the end of the feed pipe so that a variety of clamps are suitable.
  • the present invention further includes a method of conditioning a slurry feed stream flowing into the feedwell of a thickening or settling tank, where the tank includes a tank inlet system comprising an influent slurry feed pipe, nozzle and orifice directing the influent slurry feed stream into a mixing conduit, the mixing conduit including a bottom and leading to the feedwell.
  • the method exemplarily uses the apparatus described hereinabove. This method includes the steps of flowing the influent slurry feed stream through the feed pipe, nozzle and orifice into the mixing conduit, using the nozzle orifice to shape the influent slurry feed stream so that the influent feed stream has a substantially constant velocity on an output side of the orifice.
  • the method contemplates that using the feed pipe orifice includes changing or managing the shape and/or the opening size of the feed pipe orifice.
  • the feed pipe orifice may be provided in an elastomeric check valve type nozzle configured and arranged to shape the influent feed stream according to the method.
  • the nozzle may take the particular form of a duckbill type nozzle configured and arranged to shape the influent feed stream into a flattened cross-section.
  • Other types of nozzles may be used provided that they have an outlet orifice of variable size and/or shape that compensates for changes in infeed pressure to provide an output or emerging slurry stream of substantially constant velocity.
  • the feed pipe orifice is made at least in part of resilient and flexible material configured and arranged to shape the influent feed stream according to the method.
  • the method preferably further comprises feeding a diluting liquid to the mixing conduit to mix with the influent slurry feed stream, wherein the using of the feed pipe orifice to shape the influent feed stream so that the influent feed stream has a constant velocity ensures a substantially uniform degree of dilution of the influent slurry feed stream by the diluting liquid.
  • the method could also include the educting of the flow of the diluting liquid into the mixing conduit, or otherwise, by using the transfer of momentum between the influent slurry feed stream and the diluting liquid, flocculating the incoming diluting liquid and/or the slurry feed stream and the diluting liquid within the mixing conduit or otherwise, and/or producing a substantially uniform solids concentration within the resulting diluted and mixed slurry feed stream flowing into the feedwell.
  • a contractor or other entity may provide, or be hired to provide, the apparatus and/or method such as those disclosed in the present specification and shown in the figures.
  • the contractor may receive a bid request for a project related to designing a system for producing a particular slurry feed stream or may offer to design such a method and accompanying system.
  • the contractor may then provide the apparatus and/or method such as those discussed above.
  • the contractor may provide such a method by selling the apparatus and/or method or by offering to sell the apparatus and/or method, and/or the various accompanying parts and equipment to be used with and/or for said method.
  • the contractor may provide a method and/or related equipment that are configured to meet the design criteria of a client or customer.
  • the contractor may subcontract the fabrication, delivery, sale, or installation of a component of, or of any of the devices or of other devices contemplated for use with the method.
  • the contractor may also maintain, modify or upgrade the provided devices and their use within the general method.
  • the contractor may provide such maintenance or modifications by subcontracting such services or by directly providing those services.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Abstract

L'invention concerne un système de dilution d'alimentation et un procédé pour un épaississeur ou un décanteur, où une tubulure d'alimentation a un orifice variable configuré pour fournir un courant d'écoulement de la suspension d'alimentation de vitesse pratiquement constante. L'orifice du tuyau d'alimentation est disposé dans un conduit de mélange à proximité d'une extrémité amont de celui-ci, alors qu'une extrémité aval du conduit de mélange est attachée de manière fonctionnelle à un puits d'alimentation à l'intérieur de l'épaississeur ou du décanteur, de sorte que le conduit de mélange communique avec le puits d'alimentation. Si un liquide de dilution est introduit dans le conduit de mélange, la tubulure à orifice variable garantit un degré pratiquement uniforme de dilution du courant d'alimentation de la suspension affluente par le liquide de dilution.
PCT/US2012/071635 2011-12-22 2012-12-26 Système de puits d'alimentation autodiluant à flux variable Ceased WO2013096967A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161579015P 2011-12-22 2011-12-22
US61/579,015 2011-12-22

Publications (1)

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WO2013096967A1 true WO2013096967A1 (fr) 2013-06-27

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU184540U1 (ru) * 2017-09-14 2018-10-30 Акционерное общество "СОМЭКС" Радиальный сгуститель с направляющим разгрузочным диском
CN112587965A (zh) * 2020-12-11 2021-04-02 安徽盛世开元装备科技有限公司 一种中心传动浓缩机稳流筒均匀布料装置
WO2022157748A1 (fr) 2021-01-25 2022-07-28 Flsmidth A/S Appareil de dilution d'alimentation pour épaississant/clarificateurs
CN115674474A (zh) * 2021-07-30 2023-02-03 福建鸿丰纳米科技有限公司 纳米碳酸钙与聚乳酸的复合方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6367505B1 (en) * 2000-03-22 2002-04-09 Red Valve Co., Inc. Check valve with oversized bill
WO2010097762A1 (fr) * 2009-02-26 2010-09-02 Flsmidth A/S Ensemble puits d'alimentation pour épaississant/clarificateur présentant une rotation d'alimentation
US20110079563A1 (en) * 2008-05-15 2011-04-07 Outotec Oyj Improvements in feedwells

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6367505B1 (en) * 2000-03-22 2002-04-09 Red Valve Co., Inc. Check valve with oversized bill
US20110079563A1 (en) * 2008-05-15 2011-04-07 Outotec Oyj Improvements in feedwells
WO2010097762A1 (fr) * 2009-02-26 2010-09-02 Flsmidth A/S Ensemble puits d'alimentation pour épaississant/clarificateur présentant une rotation d'alimentation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU184540U1 (ru) * 2017-09-14 2018-10-30 Акционерное общество "СОМЭКС" Радиальный сгуститель с направляющим разгрузочным диском
CN112587965A (zh) * 2020-12-11 2021-04-02 安徽盛世开元装备科技有限公司 一种中心传动浓缩机稳流筒均匀布料装置
CN112587965B (zh) * 2020-12-11 2022-04-19 安徽盛世开元装备科技有限公司 一种中心传动浓缩机稳流筒均匀布料装置
WO2022157748A1 (fr) 2021-01-25 2022-07-28 Flsmidth A/S Appareil de dilution d'alimentation pour épaississant/clarificateurs
CN115674474A (zh) * 2021-07-30 2023-02-03 福建鸿丰纳米科技有限公司 纳米碳酸钙与聚乳酸的复合方法
CN115674474B (zh) * 2021-07-30 2025-07-11 福建熙鸿纳米科技有限公司 纳米碳酸钙与聚乳酸的复合方法

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