EP2566607A1 - Procédé et dispositif destinés à ajouter et à mélanger un produit chimique dans un flux de traitement - Google Patents

Procédé et dispositif destinés à ajouter et à mélanger un produit chimique dans un flux de traitement

Info

Publication number
EP2566607A1
EP2566607A1 EP11714765A EP11714765A EP2566607A1 EP 2566607 A1 EP2566607 A1 EP 2566607A1 EP 11714765 A EP11714765 A EP 11714765A EP 11714765 A EP11714765 A EP 11714765A EP 2566607 A1 EP2566607 A1 EP 2566607A1
Authority
EP
European Patent Office
Prior art keywords
chemical
stream
fluid
dilution
mixing
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.)
Granted
Application number
EP11714765A
Other languages
German (de)
English (en)
Other versions
EP2566607B1 (fr
Inventor
Thomas Jaschinski
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2566607A1 publication Critical patent/EP2566607A1/fr
Application granted granted Critical
Publication of EP2566607B1 publication Critical patent/EP2566607B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
    • D21H23/20—Apparatus therefor
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
    • B01F23/451—Mixing liquids with liquids; Emulsifying using flow mixing by injecting one liquid into another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/48—Mixing liquids with liquids; Emulsifying characterised by the nature of the liquids
    • B01F23/483—Mixing liquids with liquids; Emulsifying characterised by the nature of the liquids using water for diluting a liquid ingredient, obtaining a predetermined concentration or making an aqueous solution of a concentrate
    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/23—Mixing by intersecting jets
    • 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
    • B01F25/311—Injector mixers in conduits or tubes through which the main component flows for mixing more than two components; Devices specially adapted for generating foam
    • 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
    • B01F25/3123—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements
    • B01F25/31233—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof with two or more Venturi elements used successively
    • 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
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • 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
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3132—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit by using two or more injector devices
    • 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
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3141—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit with additional mixing means other than injector mixers
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • B01F25/431971—Mounted on the wall
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • 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
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
    • B01F25/4338—Mixers with a succession of converging-diverging cross-sections, i.e. undulating cross-section
    • 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
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
    • B01F33/811—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
    • 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
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
    • B01F33/813—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles mixing simultaneously in two or more mixing receptacles
    • 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
    • B01F35/10—Maintenance of mixers
    • B01F35/145—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means
    • B01F35/1452—Washing or cleaning mixers not provided for in other groups in this subclass; Inhibiting build-up of material on machine parts using other means using fluids
    • 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
    • B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles

Definitions

  • the invention relates to a method for admixing a liquid chemical to a process stream by means of a mixing device and to a device for admixing a liquid chemical to a process stream and a
  • Chemical feed system comprising such a device
  • EP-A-1 219 344 discloses a process for admixing a liquid
  • EP-A-1 064 427 describes a method and apparatus for mixing a liquid stream of chemical into a second stream of liquid in a mixing device, wherein the stream of chemical with the second stream of liquid substantially simultaneously with the application of the chemicals in the second liquid in another fourth liquid stream, in particular a
  • Process stream is mixed.
  • WO-A-2005/32704 discloses a method and apparatus for supplying a chemical into a liquid stream wherein the chemical is introduced into the liquid stream by means of a mixer, the chemical entering the mixing chamber, for example with mixed water or a circulating in the paper machine Liquid is mixed to form a Zumisch65keit before it is introduced into a liquid stream, in particular a process stream.
  • Dilution water stream was injected into the process stream, but the mixture of chemical flow and dilution water flow is separate to the fluid flow.
  • WO 91/021 19 From WO 91/021 19 a device has become known in which additives are mixed into an aqueous fiber suspension solution which is used for the production of paper.
  • two separately supplied streams are mixed outside a process stream and the mixed stream is injected transversely to the process stream after thorough mixing.
  • a disadvantage of WO 91/021 19 was that no accelerated injection into a process stream took place.
  • Mixing device in particular the nozzle itself arise.
  • the formation of such deposits is critical, since the cross sections of the channels are small and even small deposits due to the small cross sections can significantly influence the interference of the chemical, for example in a process stream.
  • Deposits can not only affect the mixing process as described above, but can be absorbed by the
  • the conductor cross-sections of the To choose supply lines and in the mixing device so large that such deposits are largely avoided.
  • this then has the consequence that, in order to prevent such deposits, the cross sections of the supply lines or nozzles of the mixing device are dimensioned so that no sufficiently high flow velocities are achieved. If, however, the cross section is reduced, the result may be blockages and thus malfunctions of the admixing device, in particular the nozzle, which lead to a production stoppage and to the replacement of the complete nozzle or supply lines.
  • the object of the invention is to avoid the disadvantages of the prior art.
  • a method and a device for metering or mixing a fluid or a fluid, in particular a fluid containing a chemical or even a liquid chemical itself, preferably in a process stream, in particular a process stream to produce a fiber or nonwoven web are specified .
  • a homogeneously mixed chemical-fluid-fiber mixture is metered into a process stream and mixed with this.
  • shutdowns should also occur
  • this object is achieved in that in a method for admixing a liquid chemical to a process stream by means of a
  • the mixing device has at least one housing, in particular in the form of a mixing tube, a fluid inlet opening, a chemical inlet opening, a dilution fluid inlet opening and at least one drain opening to a process stream.
  • the method is characterized in that a
  • Chemical stream from the chemical feed port and a dilution fluid stream from the dilution fluid inlet port are mixed into a fluid stream and the Fluid stream after mixing of at least chemical stream and
  • the fluid stream may be any process water that
  • a fiber or nonwoven web is usually used in the production of a fiber or nonwoven web or is available.
  • it may be an aqueous pulp suspension, wherein the pulp is preferably cellulose fibers.
  • Dilution fluid and the chemical is done can be largely total
  • Mixing with the fluid flow can be achieved and then metered a homogenously mixed chemical fluid-fiber solution then via a drain opening in a process stream and thereby mixed with this.
  • the chemicals to be metered are, in particular, polymers, for example adhesives, which are used in the papermaking process
  • Process stream are added.
  • chemicals or polymers are polyacrylamide (PAM), polyethylenimine (PEI), polyamidoamine (PAAm), crosslinkable polyamidoamine resins, polydadmac, polyvinylamine (PVAm),
  • the dosing chemicals may also be microparticles or nanoparticles, for example bentonite or a silicate.
  • the chemicals to be dosed may be starch or a biocide or a dye or an optical brightener. Other possible chemicals are neutral size such. Eg AKD
  • Calcium carbonate, titanium dioxide in the form of a suspension in a second liquid or the process stream to dose It is particularly preferred that the metered addition of the chemicals does not take place from the chemical nozzle directly into the process stream, but after the liquid chemical has been mixed with a dilution liquid and a fluid stream.
  • the dilution liquid and / or the fluid stream may be
  • the second liquid may be a circulating liquid.
  • the circulating liquid may be white water, clear filtrate, cloudy filtrate or another suitable non-pure liquid obtained in the papermaking process.
  • clear water from the microflotation (DAF), or clear filtrate or super clear filtrate for example, a disc filter.
  • Dilution liquid and / or fluid can also process water from a wastewater treatment plant, so-called bio-water can be used.
  • the process stream is preferably one to a paper machine
  • the liquid or liquid chemical in a stream of chemical and the dilution fluid in a dilution fluid stream are provided.
  • the dilution fluid flow for example the fresh water flow or the circulating water flow with the metered
  • Fluid flow is substantially mixed together.
  • it allows the method of also adjusting the concentration of chemicals in the fluid stream by the addition of the amount of dilution fluid.
  • Tube internal diameter for the chemical stream preferably in the range of 1: 1 to 20: 1, preferably 5: 1 to 10: 1, i. of the
  • Inner pipe diameter of the feed line for the dilution fluid is in extreme cases 20 times larger than the inner diameter of the pipe for the pipe
  • the supply of the chemical stream and the dilution stream and any other chemicals or other fluid streams to the fluid flow at an angle to the housing wall, in particular at an angle relative to the axis of symmetry of the mixing tube.
  • Dilution stream takes place can be in the range of 90 ° to 10 °, preferably at an angle of 60 ° to 65 °. Such an angle guarantees intensive mixing of chemical stream and dilution fluid stream. It is particularly preferred if in the region of the housing or mixing tube
  • Process flow is supplied, generated or increased. This can be done for example by means of baffles. Alternatively, a swirl may be generated so that the mixture exits the nozzle in a centrifugal flow as soon as it leaves the nozzle in the process stream. As a result, the penetration depth of the jet with admixed chemical and dilution fluid in the process stream is increased. Furthermore, the penetration of baffles not only allows a turbulent flow, but also a chemical and / or dilution fluid dosing. It is particularly preferred if, in addition to a mixing step in which a liquid chemical is supplied to the fluid stream, the method comprises a purification step. In the cleaning step, the mixing device is separated from the process stream, such that the mixing device can be cleaned independently of the process stream.
  • the separation of the mixing device from the process stream which enables independent cleaning of the mixing device from the process stream, is achieved, for example, by receiving the mixing device from a receiving device, wherein the mixing device is arranged in the receiving device in the cleaning step such that a cleaning chamber is formed.
  • the cleaning chamber cleaning fluid for example
  • Fresh water are fed, with which the supply lines and the nozzles is rinsed. By flushing the mixing device and the feeders they are cleaned of deposits and so clogging of the mixing device and the
  • the mixing device directly above the process stream z. B. are arranged in a receiving device, it is advantageous if the mixing device is designed to be displaceable in the receiving device for forming the cleaning chamber.
  • the mixing device in the receiving device is then moved away from the process stream, for example by means of manual, pneumatic, hydraulic or electromotive devices. By moving within the receiving device away from the process stream is then a
  • a sleeve can be integrated in the receiving device, which can be moved manually, pneumatically, electromotively or hydraulically in the receiving device. If the slider is spent over the complete cross section of the receiving device, the slider is the
  • Separating device for separating the cleaning room.
  • the invention also provides a device for adding a liquid chemical to a
  • Rinsing performed It is particularly preferred if the device is designed such that no ball valves or other shut-off devices are provided to the supply lines. This will increase the possibility of education
  • the invention also provides a chemical feed system for use in a paper machine, the chemical feed system being characterized in that the means for feeding the chemicals into the process stream comprise a mixing device according to the invention.
  • the device is connected via a pipe to process water recovery means to process water as a second liquid and / or
  • FIGS. 2a-b show a further embodiment of a metering nozzle according to the invention with staggered supply openings
  • Fig. 3 feeding device with opposite feed openings
  • Fig. 4 opposite feed openings for chemical stream
  • Fig. 5 inventive device with oblique injection
  • Fig. 6 mixing device according to the invention with oblique feed
  • Fig. 7 mixing device according to the invention with oblique feed
  • Fig. 8 mixing device with oblique injection and cleaning device
  • FIG. 1 shows a mixing device 10 according to the invention, comprising a chemical feed pipe 12 with a chemical feed opening 14 and a dilution fluid feed pipe 16 with dilution fluid feed opening 18.
  • Both the Chemical feed line 18, like the chemical dilution feed line 12, opens into a housing, which is preferably designed as a mixing tube 20 of the mixing device 10.
  • the mixing tube 20 is charged with a fluid flow through a fluid inlet port 30. In the area of the mixing zone 40, the flow of chemicals with the
  • a fluid stream comprising the fluid, the dilution fluid and the chemical is introduced as mixed flow from the mixing tube into a nozzle 50.
  • the mixing tube By forming the mixing tube in the region 50 as a nozzle, the mixed stream can be accelerated and fed to the process stream 70 via the discharge opening 60.
  • the discharge opening By forming the discharge opening as a nozzle, an acceleration of the mixed flow can be achieved and thus a deep penetration of the mixed
  • the outlet opening 60 is preferably formed by the preferably cylindrical inner cross section of the mixing tube 20, which has a diameter d 4 in the region of the outlet opening.
  • d 4 is smaller than d3, ie the mixing tube is formed in the region of the drain opening as a nozzle.
  • the flow velocity of the mixing tube Preferably, within the mixing tube, the flow velocity of the
  • the degree of turbulence or the type of flow, ie whether a turbulent or a laminar flow is present in the mixing tube can be described by the Reynolds number.
  • the type of flow or the Reynolds number can in particular by the volume flow of the admixture of dilution fluid and chemical
  • the mixing tube has a step change and no continuous decrease in the diameter as shown, then it is possible to form the drain opening not in the illustrated nozzle shape but as a simple cylindrical hollow body with a diameter d 4 .
  • the distance AB between the dilution fluid supply port 18 and the chemicals supply port 14 is very small and preferably between 1 mm and the diameter d3 of the mixing tube.
  • the dilution fluid may be mixed with the chemical stream and then mixed into the fluid stream completely mixed.
  • mixing of the chemical stream and the dilution fluid stream therefore takes place prior to introduction into the fluid stream.
  • Dilution water flow to the pipe diameter of the chemical stream can the mixing ratios or the concentration of the chemical are adjusted before the mixed stream is added to the fluid stream and finally introduced into the process liquid.
  • the pressure difference ⁇ of the dilution fluid with respect to the fluid flow in the range 0.5 to 5 bar, preferably in the range 1 to 2 bar and the pressure difference between the
  • FIG. 2 shows a slightly modified embodiment of a feed direction according to FIG. 1.
  • the same components as in Fig. 1 are assigned in Fig. 2a and 2b with the same reference numerals.
  • the supply lines for the dilution fluid flow and the flow of chemicals are not opposite in the same plane, but offset by a distance ABS in the mixing tube to each other.
  • the embodiment according to FIG. 1 is to be considered that the supply lines for the dilution fluid flow and the flow of chemicals are not opposite in the same plane, but offset by a distance ABS in the mixing tube to each other.
  • baffle surfaces 100.1, 100.2 are provided in the mixing tube, which serve for a dilution fluid flow, for example the dilution water flow and the chemical flow emerging from the dilution tube 16 or the chemical tube 12, to redirect and increase the turbulence of the flow so that a swirl is generated and the mixture of dilution fluid flow and chemical flow as well as fluid flow as soon as it leaves the mixing tube from the nozzle in the process stream, exits, for example, in a centrifugal flow from the nozzle.
  • a dilution fluid flow for example the dilution water flow and the chemical flow emerging from the dilution tube 16 or the chemical tube 12
  • the advantage of such an arrangement is that the penetration depth of the jet from the nozzle is increased.
  • the mixing tube 20 has a mixing space or a mixing zone 25 (boundaries are shown in phantom). Preferably, in a not shown
  • Embodiment of the mixing chamber 25 over the entire length L M i Sch be designed as a diffuser.
  • a diffuser can be realized in that the mixing tube has a step jump, ie a sudden expansion of the preferably cylindrical inner cross section of the mixing tube 20.
  • Such a sudden expansion of the cross-section leads to an increase in the turbulence of the flow and thus to a more intensive mixing of the fluid flow, for example of the fibrous stream, in particular the
  • the mixing tube is designed as an ejector or multi-stage ejector.
  • Figure 2b is a
  • the mixing tube 20 is designed in the form of a jet pump 2000.
  • the mixing tube 20 narrows in the range 2010 from the diameter d3 on the
  • Diameter dFiuid ⁇ After the constriction of the mixing tube 20 in the 2010 area, the mixing tube again undergoes an expansion to the diameter d3 in the region of the supply of the dilution fluid line 16th In the embodiment of Figure 2b, dilution fluid and chemical are again added sequentially, i. the dilution fluid supply port 18 has a clearance ABS
  • the mixing tube narrows continuously in the range 2020.
  • section 2030 the inner cross section of the mixing tube expands continuously.
  • Diluent fluid and the chemical are substantially opposite.
  • baffles 100.1, 100.2 are again provided, with which the flow can be deflected or turbulence introduced into the flow.
  • the injection into the fluid stream takes place through opposing supply lines for the chemical stream and the dilution fluid stream.
  • baffles 100.3, 100.4, 100.5, 100.6 are provided, which serve to generate a twist, so that the mixture as soon as it discharges the nozzle into the process stream exits in a centrifugal flow and further allows a chemical and / or dilution fluid dosage.
  • Fig. 4 shows an embodiment which is similar to the embodiment of Fig. 3, d. H. the dilution fluid supply port 18 and the chemical supply port 14 are opposed to each other, but in contrast to FIG
  • Embodiment according to FIG. 3 a similar narrow distance A as in Fig. 1, which is preferably between 1 mm and the diameter D3 of the mixing tube, so that a substantially complete mixing of dilution fluid and
  • Nozzle arrangement accelerates this mixed flow and in the process stream
  • the amount of dilution fluid determines the amount of dilution fluid
  • Embodiments of the invention in which the angle of the supply lines is less than 90 °, that is preferably in an angular range of 60 ° to 45 ° relative to the housing wall of the mixing tube or the axis of symmetry 201 of the mixing tube.
  • a further supply line is provided 300 provided.
  • a further fluid can be injected into the fluid flow in the mixing tube 20.
  • this could be another stream of chemicals or even the supply of filler slurry.
  • the supply line 300 is at an angle a3, which is in the range 60 ° to 45 °, as the feed angle cd and o2 for the chemical line and the
  • Diluent fluid supply line is located.
  • Fig. 7 shows a combination of at an angle in the range 60 ° to 45 ° arranged supply lines for the dilution fluid 16 and the chemical 12 with baffles 100.3, 100.4, 100.5, 100.6, the turbulence generation and the chemical and / or fluid dosage serve.
  • FIG. 8 Particularly preferred is an embodiment according to FIG. 8, in which, in addition to the feed lines, the mixing device can be moved within a receptacle in the axial direction.
  • the mixing chamber can also be used as a cleaning chamber.
  • the end portion 54 may be varied in length so that it can be adjusted whether the second liquid stream supplied through the second flow channel exits simultaneously, before, or after the chemical stream or first liquid stream supplied via the first flow channel 12.
  • the mixing device 200 can be moved within a receiving housing 220 or a receptacle in the axial direction 222.
  • FIGS. 1-7 In addition to the embodiment shown in FIGS. 1-7, FIG.
  • Receiving device 220 a gate valve 230.
  • the gate valve 230 is in the direction 232 designed movable.
  • the mixing device 200 or metering nozzle can be guided through the gate valve shown open.
  • the slide 230 can be introduced over the entire cross section of the receiving device 220 at a position of the mixing device 200 according to FIG. 8.
  • the mixing device 200 is separated from the process stream 70.
  • a cleaning space 400 is formed, which preferably coincides with the mixing area.
  • fresh water can be fed into the chemical supply line instead of a chemical stream.
  • the feed via the dilution feed or the other would be
  • the nozzles and the feeders, in particular the mixing device can be represented by such a cleaning step, be cleaned by the chemicals contained therein, in particular their deposits.
  • dosing chemicals in particular polymers, for example
  • the dosing chemicals may also be microparticles or nanoparticles, for example bentonite or a silicate.
  • the chemicals to be dosed may be starch or a biocide or a dye or an optical brightener. Other possible chemicals are neutral size such.
  • AKD Acrylketendimer
  • ASA alkenylsuccinic anhydride

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Accessories For Mixers (AREA)

Abstract

L'invention concerne un procédé destiné à ajouter et à mélanger un produit chimique liquide dans un flux de traitement au moyen d'un dispositif de mélange (10,200) comportant un boîtier, notamment un tube mélangeur (20), au moins une ouverture d'entrée de fluide (30), une ouverture d'entrée de produit chimique (14), une ouverture d'entrée de fluide de dilution (18) et au moins une ouverture de sortie (60) vers un flux de traitement (70). Le procédé de l'invention est caractérisé en ce qu'un flux de produit chimique sortant de l'ouverture d'entrée de produit chimique (14) et un flux de fluide de dilution sortant de l'ouverture d'entrée de fluide de dilution (18) sont mélangés en un courant fluide, et ce courant fluide, après le mélange du flux de produit chimique et du flux de fluide de dilution, est envoyé à travers une buse et de préférence projeté vers un flux de traitement (70) par une ouverture de sortie (60).
EP20110714765 2010-05-05 2011-04-14 Procédé et dispositif destinés à ajouter et à mélanger un produit chimique dans un flux de traitement Not-in-force EP2566607B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010028577 DE102010028577A1 (de) 2010-05-05 2010-05-05 Verfahren zur Zumischung einer Chemikalie zu einem Prozessstrom
PCT/EP2011/055912 WO2011138143A1 (fr) 2010-05-05 2011-04-14 Procédé et dispositif destinés à ajouter et à mélanger un produit chimique dans un flux de traitement

Publications (2)

Publication Number Publication Date
EP2566607A1 true EP2566607A1 (fr) 2013-03-13
EP2566607B1 EP2566607B1 (fr) 2014-06-11

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EP20110714765 Not-in-force EP2566607B1 (fr) 2010-05-05 2011-04-14 Procédé et dispositif destinés à ajouter et à mélanger un produit chimique dans un flux de traitement

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Country Link
EP (1) EP2566607B1 (fr)
CN (1) CN103002977B (fr)
DE (1) DE102010028577A1 (fr)
WO (1) WO2011138143A1 (fr)

Cited By (1)

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EP4286037A3 (fr) * 2022-05-30 2024-02-21 Westnetz GmbH Dispositif de mélange compact pour mélanger des fluides

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DE102011007274A1 (de) * 2011-04-13 2012-10-18 Voith Patent Gmbh Verfahren und Düsenanordnung zum Einbringen von Chemikalien und/oder Additiven in einen Prozessstrom eines Herstellungsprozesses
CN104755159B (zh) 2012-08-28 2017-09-22 巴斯夫欧洲公司 用于将至少一种化学物质送入至主工艺流中的方法和装置
DE102014223849A1 (de) * 2014-11-24 2016-05-25 Voith Patent Gmbh Vorrichtung und Verfahren zur Einmischung von Fluiden
CN106390846A (zh) * 2016-12-01 2017-02-15 安徽砀山金兄弟实业科技有限公司 一种造纸助剂使用操作设备
CN107981407B (zh) * 2018-01-19 2020-04-17 河南卷烟工业烟草薄片有限公司 一种无动力造纸法再造烟叶生产过程混料装置
DE202021002842U1 (de) 2021-09-02 2022-01-19 IAB-Institut für Angewandte Bauforschung Weimar gemeinnützige GmbH Vorrichtung zur schonenden Homogenisierung zweier getrennt erzeugter Schäume zu einem Schaum
DE102022110733A1 (de) 2022-05-02 2023-11-02 Rolls-Royce Deutschland Ltd & Co Kg Mischungsvorrichtung für einen primären Fluidstrom in einem ersten Rohr mit mindestens einem sekundären Fluidstrom, ein Verfahren zur Mischung und ein Flugzeugtriebwerk

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US5200267A (en) * 1989-03-20 1993-04-06 Medite Corporation Fire-retardant synthretic board product
EP0485498B2 (fr) 1989-07-29 1999-12-08 Roe Lee Paper Chemicals Co. Limited Traitement de matieres fibreuses
FI108802B (fi) 1998-02-26 2002-03-28 Wetend Technologies Oy Menetelmä ja laite kemikaalin syöttämiseksi nestevirtaan sekä paperikoneen syöttöjärjestelmä
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Publication number Priority date Publication date Assignee Title
EP4286037A3 (fr) * 2022-05-30 2024-02-21 Westnetz GmbH Dispositif de mélange compact pour mélanger des fluides

Also Published As

Publication number Publication date
DE102010028577A1 (de) 2011-11-10
WO2011138143A1 (fr) 2011-11-10
CN103002977A (zh) 2013-03-27
CN103002977B (zh) 2015-11-25
EP2566607B1 (fr) 2014-06-11

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