CN103002977B - For chemicals being mixed into the method and apparatus in process streams - Google Patents

For chemicals being mixed into the method and apparatus in process streams Download PDF

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Publication number
CN103002977B
CN103002977B CN201180033333.9A CN201180033333A CN103002977B CN 103002977 B CN103002977 B CN 103002977B CN 201180033333 A CN201180033333 A CN 201180033333A CN 103002977 B CN103002977 B CN 103002977B
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CN
China
Prior art keywords
chemicals
stream
fluid
process streams
feed line
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Expired - Fee Related
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CN201180033333.9A
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Chinese (zh)
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CN103002977A (en
Inventor
T.贾欣斯基
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Voith Patent GmbH
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Voith Paper Patent GmbH
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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

Abstract

The present invention relates to a kind of method and apparatus be mixed into by liquid chemicals by mixing apparatus (10,200) in process streams, described mixing apparatus comprises: the especially housing of mixing tube (20), at least one fluid inlet opening (30), chemicals inlet opening (14), diluted fluid inlet opening (18), and at least one leads to the outflow opening (60) of process streams (70).Feature according to method of the present invention is, by the chemicals stream from chemicals inlet opening (14) be mixed into fluid stream from the diluted fluid stream of diluted fluid inlet opening (18), and after chemicals stream and the mixing of diluted fluid stream fluid flowed through and flow out opening (60) and be particularly supplied to process streams (70) post by nozzle, be preferably injected in described process streams (70).

Description

For chemicals being mixed into the method and apparatus in process streams
Technical field
The present invention relates to a kind of method by mixing apparatus, liquid chemicals being mixed into process streams, and a kind of for liquid chemicals being mixed into the equipment of process streams and comprising the chemicals feed system of this kind equipment.
Background technology
Special requirement is proposed for (chemicals such as in paper technology) rationing and being mixed into subsequently, is particularly effectively mixed into and requirement as required in rationing at chemicals.Rationing refers to and such as in paper technology, adds chemicals according to fibre weight in the process streams of paper machine as required.By such measures, in paper technology, degree the amount of added chemicals can be reduced significantly.The Another reason of chemicals is effectively used to be for dissolving or dilution chemicals and heat fresh water and need a large amount of energy.This type of heating is conducive to avoiding the thermal shock when chemicals being mixed into fresh water.By providing one by chemicals rationing and being mixed into the effective ways in process streams (process streams particularly when manufacturing web of fiber and/or non-woven fabric width), degree not only can reduce the consumption of pro-cess chemicals and performance chemicals significantly but also be reduced in the use being used as the fresh water of diluent media when chemicals prepares.
Method and apparatus chemicals stream being mixed into process streams is used for from row more known in the state of the art.Therefore EP-A-1219344 provides the method for being mixed into by liquid chemicals in process liquids stream, if wherein chemicals and second liquid are incorporated into process streams from mixing nozzle with high speed, then makes chemicals and second liquid substantially mutually mix.
EP-A-1064427 describes for liquid chemicals stream being mixed into the method and apparatus in second liquid stream in mixing apparatus, and when wherein separating out chemicals in second liquid stream, chemicals stream and second liquid stream mix substantially simultaneously in the 4th other liquid stream particularly process streams.
WO-A-2005/32704 shows the method and apparatus for being provided to by chemicals in liquid stream, wherein chemicals is incorporated in liquid stream by means of blender, wherein chemicals such as mixes with mixing water or at the liquid of paper machine Inner eycle in blending space, to form mixing material, then this mixing material is incorporated in liquid stream, is particularly incorporated in process streams.
On the one hand must provide the independent blending space with mixing chamber form according to the shortcoming of the equipment of WO-A-2005/32704, on the other hand mixing chamber from Fluid flow from and therefore not the fluid stream mixed completely, chemicals stream and dilution water flow are injected in process streams, but the mixing of chemicals stream and dilution water flow and Fluid flow are turned up the soil and are carried out.
From WO91/02119, there is known a kind of equipment, wherein additive is mixed in the fiber water suspension for papermaking.
According in the structure of WO91/02119, two streams guided dividually are mixed outward at process streams and the stream of mixing is sprayed into transverse to process streams after complete mixing.The shortcoming of WO91/02119 is in process streams, do not realize spraying into of acceleration.
In addition, chemicals stream and dilution water flow are introduced directly in process streams, but not are incorporated in fluid stream.
The shortcoming that all preceding methods and equipment have in addition in feed line and also in mixing apparatus, particularly in nozzle itself, forms deposition in longer operation.Especially such as have nozzle form mixing apparatus region in, formation of this type of deposition is serious, because the cross section of passage is little, and deposition in a small amount can affect chemicals to being mixed in such as process streams significantly due to described little cross section.
Even if when unplanned unexpected production stops (now chemical residues is in feed line and mixing apparatus, especially in nozzle), also can deposition be produced.Deposition not only can affect mixed process as previously mentioned, and comes off when starting production process after machine stops.Described deposition such as causes the hole in paper web or causes the deposition on sieve, and this causes again expensive clean shutdown.More obvious during rationing after the screening installation of this problem especially in paper machine because undissolved chemicals particularly undissolved polymer can not remove from fibrous suspension.
For avoiding the deposition between continuous operating period, the line cross section of feed line and the line cross section in the region of mixing apparatus can be advised in the prior art to be chosen as enough large, thus avoiding this type of deposition to a great extent.This causes certainly for preventing this type of deposition to design to realize sufficiently high flowing velocity by the cross section of feed line or the jet size of mixing apparatus.And if reduce cross section, then may cause blocking and therefore cause the dysfunction of mixing apparatus particularly nozzle, this causes producing and stops and causing changing whole nozzle or feed line.
Summary of the invention
Therefore, technical problem to be solved by this invention avoids shortcoming of the prior art.
Especially, give for fluid or liquid particularly being comprised the liquid of chemicals or the rationing of liquid chemicals self or being mixed into for generation of the method and apparatus in the process streams of web of fiber or non-woven fabric width, wherein as far as possible mixed uniformly chemistry fluid fibre blend should be injected in process streams, and mix with it.In addition, the deposition of the hole in web of fiber and deposition also should be avoided such as may causing when production process restarts to come off caused shutdown.
According to the present invention, this technical problem is solved by a kind of method be mixed into by liquid chemicals in process streams by mixing apparatus, described mixing apparatus comprises the housing especially with mixing tube form, fluid inlet opening, chemicals inlet opening, diluted fluid inlet opening, and at least one leads to the outflow opening of process streams.The feature of described method is, chemicals stream from chemicals inlet opening and the diluted fluid stream from diluted fluid inlet opening are mixed into fluid stream, and after at least one chemicals stream and the mixing of diluted fluid stream fluid flowed through and flow out opening and be particularly provided to process streams post by nozzle, be preferably injected to described process streams.
Fluid stream can be usually use or operational any process water when producd fibers width or non-woven fabric width.Especially, fluid stream can be fiber water suspension, and wherein fibrous material is preferably cellulose fibre.
Mixing with diluted fluid and the strong of chemicals by realizing fluid stream, can realize to a great extent and always the mixing of fluid stream, and then will mix with it at this in the rationing to process streams of mixed uniformly chemistry fluid stream fiber solution by flowing out opening.
Treat the chemicals particularly polymer of rationing, such as, in paper technology, add the adhesive agent of process streams to.The example of this type of chemicals or polymer is polyacrylamide (PAM), polymine (PEI), polypropylene amine (PAAm), crosslinkable polypropylene amine resin, PDDA, polyvinylamine (PVAm), polyethylene glycol oxide (PEO).Substituting as aforementioned polymer, the chemicals of rationing also can be micron particles or nano particle, such as bentonite or silicate.In addition, treat that the chemicals of rationing can be starch or biocide or pigment or optical brightener.Possible chemicals is in addition neutral gum mixture, such as AKD(alkyl ketene dimer) or ASA(alkenyl succinic anhydride).In addition, according to The inventive method achieves also by have the such as calcium carbonate of form of suspension, titanium dioxide mineral matter rationing in second liquid or in process streams.
Particularly preferably be, the rationing of chemicals not chemically product nozzle directly add in process streams, but to carry out after liquid chemicals mixes with diluent liquid and fluid stream.Diluent liquid and/or fluid stream can be fresh waters.Alternatively, second liquid can be circulating fluid.In principle, often kind of liquid using during the course or fluid can be considered.Especially, in the manufacture process of web of fiber, circulating fluid is plain boiled water, clear filtrate, turbid filtrate or the other suitable non-neat liquid that occurs in paper technology.But also can conceive the clear water that comprises micron aerosol thing (DAF) or clear filtrate one-level surpasses clear filtrate, the super clear filtrate of such as disc filter.Diluent liquid and/or fluid also can be the process waters from waste water cleaning equipment, namely use so-called Biological water.Process streams can be preferably added chemicals, such as keep the fibrous suspension of the inflow paper machine that chemicals can react with it.
Preferably, in mixing apparatus, liquid or liquid chemicals provide in the first chemicals stream, and diluted fluid provides in diluted fluid stream.
According to the present invention's suggestion, diluted fluid stream, the diluted fluid stream of such as fresh current or circulating water flow is being provided to process streams precedent as mixed in Mixed Zone with the chemicals of the chemicals stream treating rationing.
Especially, realize chemicals stream and diluted fluid stream are substantially mutually mixed before being mixed into fluid stream in the form of implementation of expansion.Especially, the method also achieves the chemical concentration regulated by the addition of diluted fluid in fluid stream.For this reason, such as can change the relation of the caliber of diluted fluid stream and the caliber of chemicals stream, preferably its pass ties up in the scope of 1:1 to 20:1, preferably in the scope of 5:1 to 10:1, i.e. the caliber of the feed line of diluted fluid stream in limiting case larger than the caliber of the feed line of chemicals stream 20 times.
Preferably, chemicals flows to the supply of fluid stream and diluent stream angularly to carry out to the supply of fluid stream described in the supply of fluid stream and possible other chemicals or other direction of flow and housing wall, angularly supplies especially relative to the axis of symmetry of mixing tube.
Angle when carrying out the interpolation of chemicals stream and/or diluent stream can in the scope of 90 ° to 10 °, preferably in the scope of 60 ° to 65 °.This type of angle ensure that the strong mixing of chemicals stream and diluted fluid stream.
Particularly preferably be and take measures in the region of housing or mixing tube, to make in the flowing being provided to process streams turbulization or improve turbulent flow.This can such as by means of shock surface realize.
Alternatively, eddy flow can be produced, as long as make mixing to leave in nozzle to process streams then with centrifugal stream from nozzle out.With this, the depth of invasion of beam in process streams with the chemicals be mixed into and diluted fluid increases.In addition, the introducing of shock surface not only achieves the flowing of turbulent flow, and achieves the rationing of chemicals and/or diluent stream.
Particularly preferably be the method and comprise cleaning except wherein liquid chemicals being added to the blend step of fluid stream.In cleaning, mixing apparatus is separated with process streams, make mixing apparatus can independent of process streams ground cleaned.
Mixing apparatus is separated with process streams the cleaning independent of process streams achieving mixing apparatus, this separation such as realizes in the following way, namely make mixing apparatus be received device to receive, wherein mixing apparatus is arranged as formation clean room in cleaning in receiving system.Can the clean liquid of such as fresh water be provided in clean room, rinse feed line and nozzle with described clean liquid.By rinsing mixing apparatus and feed line, will deposit from its removing, and therefore avoid mixing apparatus and feeding member to a great extent and be deposited thing and block.
Preferably make mixing chamber simultaneously as clean room or cleaning area.If mixing apparatus can directly be arranged in above process streams, such as, be arranged in receiving system, then advantageously mixing apparatus is formed as to move to form clean room in receiving system.For clean mixing apparatus, being moved into by mixing apparatus in receiving system and removing from process streams, such as manually, pneumatic, hydraulic pressure or electric device move.By removing from process streams in receiving system, provide clean room.
For being guided in receiving system by mixing apparatus, joint can be provided.Preferably, such as accessible site slide block in receiving system, described slide block manually, pneumatically, electrically or hydraulically moves in receiving system.If slide block is arranged on the whole cross section of receiving system, then slide block is the separator for separating of clean space.
Except a kind of aforementioned method by mixing apparatus liquid chemicals being mixed into process streams, present invention provides the equipment for liquid chemicals being mixed into process streams.For the flowing velocity in mixing apparatus or in feedway can be chosen as high flowing velocity and make between continuous operating period without deposition or only have very low deposition, the little line cross section at the feed line place of fluid chemicals is correspondingly selected to make flowing velocity reach in the scope of 0.05 meter per second to 20 meter per second, preferably reach in the scope of 0.1 meter per second to 10 meter per second, and particularly reach in the scope of 0.1 meter per second to 5 meter per second.
For the attachment of prevention in channel wall, perform flushing process when causing the little line cross section of high flowing velocity.Particularly preferably be and equipment is formed as making ball valve or other cut-off device not to be provided to feed line.Therefore, the possibility forming deposition in the narrow profile edge of ball valve or cut-off device is prevented.In addition manufacture is simplified, because the processing of this base part is expensive, particularly must carry out electrobrightening.
For mixing apparatus being placed in process streams and removing from process streams, can advise making mixing apparatus be formed as removable in receiving element.
Except equipment according to the present invention, present invention provides the chemicals feed system for being used in paper machine, the feature of wherein said chemicals feed system is, comprises according to mixing apparatus of the present invention for device chemicals being supplied to process streams.In the form of implementation of expansion, can advise this equipment is connected with process water retracting device by pipeline, so that process water is used as second liquid and/or diluent liquid.
Accompanying drawing explanation
Exemplarily the present invention is described without limitation with reference to the accompanying drawings hereinafter.
Each figure is:
Fig. 1 shows the first structure according to rationing nozzle of the present invention;
Fig. 2 a to Fig. 2 b shows the other structure according to rationing nozzle of the present invention with biased supply opening;
Fig. 3 shows the feedway of supply opening with opposed and turbulent flow maker;
Fig. 4 shows the opposed supply opening with turbulent flow maker for chemicals stream and diluent liquid;
Fig. 5 shows the equipment according to the nozzle with tilting of the present invention;
Fig. 6 shows according to of the present invention with the feedway of inclination and the mixing apparatus of other feeding pipe;
Fig. 7 shows according to of the present invention with the feedway of inclination and the mixing apparatus of turbulent flow maker;
Fig. 8 shows the mixing apparatus with the nozzle tilted and cleaning equipment.
Detailed description of the invention
Figure 1 illustrates according to mixing apparatus 10 of the present invention, described mixing apparatus 10 comprises the chemicals inflow pipe 12 with chemicals inlet opening 14 and the diluted fluid inflow pipe 16 with diluted fluid inlet opening 18.Chemicals feed line 18 and chemicals feed line 12 are at housing inner opening, and described housing is preferably formed as the mixing tube 20 of mixing apparatus 10.Mixing tube 20 is supplied to fluid stream by fluid inlet opening 30.In the region of mixed zone 40, chemicals stream mixes with diluted fluid, and is then mixed into the fluid supplied by inlet opening 30 from mixed zone.Below mixed zone, the fluid stream comprising fluid, diluted fluid and chemicals is introduced in nozzle 50 from mixing tube as mixed flow.By mixing tube is formed as nozzle in region 50, mixed flow can be accelerated and be provided to process streams 70 by flowing out opening 60.
Especially, the mixing completely of in fact fluid stream and chemicals stream and diluent stream is realized by equipment according to the present invention, mixed uniformly chemistry fluid fibre blend is passed through flow out opening 60 rationing in process streams, and can mix with described process streams.
By outflow opening is formed as nozzle, the acceleration of mixed flow can be realized, and therefore realize the dark intrusion of mixed flow in process streams of mixing.
Flow out the preferred cylindrical interior cross section formation of opening 60 preferably by mixing tube 20, described cross section has diameter d in the region of flowing out opening 4.Usually, d 4be less than d 3, namely mixing tube is formed as nozzle in the region of flowing out opening.
Preferably, in mixing tube, the flowing velocity of fluid stream depends on diameter d 4or d 3be chosen as, make the flow performance preferably forming turbulent flow.Describe by Reynolds number for turbulent flow or laminar flow in the length of turbulent flow or the type of flowing and mixing tube.Pattern of flow or Reynolds number can be affected by the volume flow of the fluid stream provided before diluted fluid and chemicals mixing especially.
If mixing tube has step and discontinuous reduced as illustrated, then flow out opening and can not be formed as illustrated form of nozzle, but to be formed as diameter be d 4simple cylinder type hollow body.
Particularly preferably be, the diameter d of dilution tube 1with the diameter d of chemical QC 2ratio be 1:1 to 20:1, be preferably 5:1 to 10:1.I.e. d 1: d 2be in the scope of 1:1 to 20:1.
Illustrated in FIG, dilution tube with relative to angle [alpha] 1=90 ° of housing wall 55 and chemical QC to extend in mixing tube relative to angle [alpha] 2=90 ° of housing wall 55.
In addition, the distance AB between the supply opening 18 of visible diluted fluid and the supply opening 14 of chemicals is very little, and preferably in the diameter d of 1mm and mixing tube 31/4 between.
If the supply opening of the supply opening of diluted fluid stream and chemicals stream leans on very near, then diluted fluid can mix with chemicals stream, and is completely mixedly mixed in fluid stream.In the form of implementation of Fig. 1, therefore chemicals stream and diluted fluid stream be blended in be incorporated into fluid stream before carry out.
Regulate the stream of mixing being mixed into fluid stream and mixed relationship before being finally incorporated into process liquids or chemical concentration by the caliber of dilution water flow and the corresponding size design of the caliber of chemicals stream.Preferably, diluted fluid is in the scope of 0.5bar to 5bar relative to the pressure differential δ P of fluid stream, is preferably in the scope of 1bar to 2bar, and chemicals stream is in the scope of-0.25bar to 0bar relative to the pressure differential of fluid stream.
Illustrate the structure slightly changed of the feedway according to Fig. 1 in fig. 2.The parts identical with Fig. 1 have identical drawing reference numeral in Fig. 2 a and Fig. 2 b.Be that the feeding pipe for diluted fluid stream and chemicals stream is not opposed in same plane with the notable difference of the form of implementation in Fig. 1, but arrange with mutually staggering in mixing tube with distance ABS.
In addition, feature according to the form of implementation of Fig. 2 a is, shock surface 100.1,100.2 is provided in mixing tube, described shock surface is used on the one hand to improve the turbulent flow of flowing from the diluted fluid stream of dilution tube 16 or chemical QC 12 such as dilution water flow out and the deflection of chemicals stream, make to produce eddy flow and the mixture making to comprise diluted fluid stream and chemicals stream and fluid stream when leaving in mixing tube to process streams from nozzle such as with centrifugal stream from nozzle out.The advantage of this kind equipment increases the depth of invasion leaving the beam of nozzle.
Mixing tube 20 has blending space or 25(border, mixed zone illustrates with dotted line).Preferably, in not shown form of implementation, blending space 25 can at whole length L mischon be formed as diffuser.In the form of implementation substituted, achieve the part after the chemicals supply opening 14 making only chemical QC 12 as length L cHEMbe formed as diffuser (not shown).This type of diffuser realizes by making mixing tube have step, and namely the internal cross section of the pref. cylindrical of mixing tube 20 has widening of step.The rising of widening the turbulent flow causing flowing of this type of step of cross section, and therefore cause the stronger mixing of the fluid stream of such as fibre stream, particularly cause pars fibrosa stream to mix with diluted fluid stream and/or the strong of chemicals stream.
Usually, when the constant cross-section of mixing tube, also affect turbulent extent by improving volume flow rates, such as, affect turbulent extent by improving the volume being supplied to the fluid stream of mixing apparatus.
In the structure substituted of mixing apparatus of the present invention, mixing tube is formed as injector or series ejectors.Show the mixing tube of the injector be formed as the form with jet pump in figure 2b.The parts identical with Fig. 1 with Fig. 2 a indicate with identical drawing reference numeral.In figure 2b, mixing tube 20 is configured to the form of jet pump 2000.First, blender 20 in region 2010 from diameter d 3be reduced into diameter d fluid.At mixing tube 20 in region 2010 after constriction, mixing tube has to diameter d again in the supply area of diluted fluid pipeline 16 3expansion.According in the form of implementation of Fig. 2 b, in succession supply diluted fluid and chemicals again, namely diluted fluid supply opening 18 has distance ABS apart from chemicals supply opening 14.Mixed zone is with 25 marks.After diluted fluid and chemicals supply, mixing tube is constriction continuously in region 2020 again.In part 2030, the internal cross section of mixing tube increases continuously again.This structure of mixing tube is also referred to as injector.Turbulent flow and therefore mixing efficiency be affected by the geometry of the preferably columniform cross section of diffuser or injector and course.
In addition, chemistry fluid rationing and/or diluted fluid rationing is also realized by shock surface.This is in particular according to the situation in the embodiment of Fig. 3.Represented by identical drawing reference numeral with the identical parts in fig. 1 and 2.Be that the feed line for diluted fluid and chemicals is substantially opposed according to the difference of the embodiment of Fig. 2 and Fig. 3.Also according in the form of implementation of Fig. 3, further provide shock surface 100.1,100.2, by deflect flow or can introduce turbulent flow in flowing with described shock surface.Spraying into by realizing for the opposed feeding pipe of chemicals stream and diluted fluid stream in fluid stream.
According in the form of implementation of Fig. 3, except except shock surface shown in figure 2, provide the other shock surface 100.3,100.4,100.5,100.6 for generation of eddy flow, mixture is left when leaving in nozzle to process streams in centrifugal stream and achieves the rationing of chemicals and/or diluted fluid in addition.
Shown in Fig. 4 form of implementation be similar to form of implementation according to Fig. 3, namely for the supply opening 18 of diluted fluid and the supply opening 14 for chemicals mutually opposing, but with the similar narrow distance A had compared with the form of implementation of Fig. 3 as shown in FIG. 1, described distance A preferably at the diameter D of 1mm and mixing tube 31/4 between, make to achieve to a great extent diluted fluid and chemicals entering into the mixing completely before in fluid stream.In all so far described forms of implementation, blending space that wherein diluted fluid and chemicals stream and fluid stream mixes mutually is defined or 25(border, mixed zone indicates with dotted line in mixing tube 20), make to exist at outflow opening 60 place leading to process streams 70 and comprise the strong of fluid stream, diluted fluid stream and chemicals stream and the mixed flow virtually completely mixed.
Before this mixture arrives injector arrangement, this mixed flow can be accelerated and be injected in process streams by injector arrangement.The amount of diluted fluid determines the chemical concentration in fluid stream.
According in all embodiments of Fig. 1 to Fig. 4, the dilution angle [alpha] 1 of feeding pipe or the angle [alpha] 2 of chemicals feeding pipe are 90 °, and according to the angle that the form of implementation of Fig. 5, Fig. 6 and Fig. 7 shows wherein feeding pipe be less than 90 ° according to structure of the present invention, namely described angle is preferably in the scope of 60 ° to 45 ° relative to the housing wall of mixing tube or the axis of symmetry 201 of mixing tube.
Mixing can be realized by the inclination in the scope of 60 ° to 45 ° and stream need not be made very by force to leave the direction upper deflecting of opening.The parts identical with Fig. 1 to Fig. 4 indicate with identical drawing reference numeral again.
According in the structure of Fig. 5, the distance between chemicals supply opening 14 and diluted fluid supply opening 18 is very little again, namely at the diameter D of 1mm and mixing tube 31/4 between, make to achieve the strong mixing of chemicals stream and diluted fluid stream before being injected in fluid stream and therefore achieve concentration adjustment.
According in the structure of Fig. 6, except the dilution pipeline in Figure 5 and chemical pipeline, provide other feeding pipe.Other fluid can be injected in the fluid stream in mixing tube 20 from additional feeding pipe 300.Such as, described other fluid can be other chemicals stream or also be the supply of filler-slurry.Also arrange with the angle [alpha] 3 be in the scope of 60 ° to 45 ° as the supply angle [alpha] 1 of chemical pipeline and diluted fluid feeding pipe and α 2 feeding pipe 300.
Fig. 7 show be arranged in 60 ° to 45 ° angular range in for diluted fluid 16 or chemicals 12 feeding pipe with for generating the combination of the shock surface 100.3,100.4,100.5,100.6 of turbulent flow or chemicals rationing and/or fluid quantitative dispensing.
Especially preferably according to the form of implementation of Fig. 8, wherein except feeding pipe, mixing apparatus is movable in the axial direction in receiving element.The parts identical with Fig. 6 have identical drawing reference numeral.According in the structure of Fig. 8, mixing chamber can be used as clean room simultaneously.For this reason, the supply of second liquid in process streams is achieved.End portion 54 can change over its length, and whether the adjustable second liquid stream by the second flow channel supply is left with the chemicals stream supplied by the first flow channel 12 or first fluid stream, or leave before the latter or afterwards simultaneously.
According in the form of implementation of Fig. 8, mixing apparatus 200 can move in reception housing 220 or receiving element on axial direction 222.
Except structure illustrated in Fig. 1 to Fig. 7, receiving system 220 comprises cut-off slide block 230.Described cut-off slide block 230 is configured to movable in the direction 232.Mixing apparatus 200 or rationing nozzle guide by being illustrated as the cut-off slide block opened.
In fig. 8, at valve 230 such as pneumatically, hydraulically or when opening electrically, mixing apparatus 200 is drawn from process streams on direction 222 at receiving element or receive in housing.
For starting cleaning course, in the position of the mixing apparatus 200 according to Fig. 8, valve 230 can be introduced on the whole cross section of receiving equipment 220.By the stop valve 230 of closing, mixing apparatus 200 is separated from process streams 70.Between mixing apparatus 200 and stop valve 230, define clean space 400, described clean space preferably overlaps with Mixed Zone.
For starting to clean, can such as in chemicals feeding pipe as the alternative supply fresh water of chemicals stream.Certainly, also by dilution feeding pipe or the supply of other feeding pipe.
Impacted in cleaning on the stopper 230 of closing by the fresh water of such as chemicals feeding pipe supply, and can supply in two other feeding pipes 16,300.At this, in this supply, the medium on institute edge is extruded by fresh water or fluid cleaning medium.Nozzle and pipeline particularly mixing apparatus are eliminated the deposition of the chemicals contained in it, particularly chemicals as illustrated by this type of cleaning.Therefore, be deposited the mixed equipment caused and supply be blocked in shutdown time disposed on one's own initiative independent of process streams.
Treat the chemicals particularly polymer of rationing, such as, in paper technology, add the adhesive agent of process streams to.The example of this type of chemicals or polymer is polyacrylamide (PAM), polymine (PEI), polypropylene amine (PAAm), crosslinkable polypropylene amine resin, PDDA, polyvinylamine (PVAm), polyethylene glycol oxide (PEO).Substituting as aforementioned polymer, the chemicals of rationing also can be micron particles or nano particle, such as bentonite or silicate.In addition, treat that the chemicals of rationing can be starch or biocide or pigment or the thing that adds lustre to.Possible chemicals is in addition neutral gum mixture, such as AKD(alkyl ketene dimer) or ASA(alkenyl succinic anhydride).In addition, according to The inventive method achieves also by have the such as calcium carbonate of form of suspension, titanium dioxide mineral matter rationing in second liquid or in process streams.
Use and give in order to realize in fact by chemicals stream and diluted fluid stream and the method and apparatus being supplied to the fluid stream in process streams and mixing completely according to equipment of the present invention and method according to the present invention.Especially, also create eddy flow by means of shock surface, make mixed flow have centrifugal flowing when entering in process streams and therefore there is the very large depth of invasion in process streams.

Claims (21)

1. fluid or liquid self to be mixed into the method in process streams by one kind by mixing apparatus (10,200), described mixing apparatus comprises: housing, at least one fluid inlet opening (30), chemicals inlet opening (14), diluted fluid inlet opening (18), the outflow opening (60) of process streams (70) is led to at least one
Wherein, by the chemicals stream from chemicals inlet opening (14) be mixed into fluid stream from the diluted fluid stream of diluted fluid inlet opening (18), and after chemicals stream and the mixing of diluted fluid stream fluid flowed through and flow out opening (60) and be supplied to post in process streams (70)
It is characterized in that, supply other chemicals or other fluid stream to described fluid stream.
2. method according to claim 1, is characterized in that, described fluid or liquid are liquid containing chemicals or liquid chemicals.
3. method according to claim 1, is characterized in that, described outflow opening (60) is nozzle.
4. method according to claim 1, is characterized in that, described fluid stream is injected in described process streams (70).
5. method according to claim 1, is characterized in that, chemicals stream and diluted fluid stream substantially mutually mix before being mixed into fluid stream.
6. method according to claim 1 or 5, is characterized in that, regulate the chemical concentration in fluid stream by the addition of diluted fluid.
7. method according to claim 1 or 5, it is characterized in that, chemicals inlet opening and/or diluted fluid inlet opening tilt relative to the housing wall of mixing tube.
8. method according to claim 7, is characterized in that, the angle (α 1, α 2, α 3) that chemicals inlet opening and/or diluted fluid inlet opening tilt relative to the housing wall of mixing tube is between 10 ° to 90 °.
9. method according to claim 1 or 5, is characterized in that, to described fluid stream supply filler-slurry as other chemicals or other fluid stream.
10. method according to claim 1 or 5, it is characterized in that, chemicals stream and/or diluted fluid stream and/or fluid stream are affected before mixing and/or afterwards, make flowing through of turbulent flow flow out opening (60) and be supplied to process streams (70).
11. methods according to claim 1 or 5, it is characterized in that, the method comprises cleaning except wherein liquid chemicals being supplied to the blend step of fluid stream, and mixing apparatus (200) is separated with process streams (70) in described cleaning, make mixing apparatus (200) can be cleaned independent of process streams (70).
12. 1 kinds for being mixed into the equipment of process streams (70) by liquid chemicals, described equipment comprises housing, at least one fluid feed line (30), chemicals feed line (12), diluted fluid feed line (16) and outflow lines (60)
Wherein,
At least chemicals feed line (17) and diluted fluid feed line (16) are arranged so that in housing, define Mixed Zone (25), wherein, chemicals stream and diluted fluid stream are introduced in fluid stream, and abundant mixed flowing is as a result introduced in process streams (70) from outflow opening (60)
It is characterized in that,
Chemicals feed line (12) and diluted fluid feed line (16) spatially mutual near, make chemically product inlet opening chemicals stream out and mutually mix to a great extent with fluid stream before combination from diluted fluid inlet opening diluted fluid stream out, the distance AB that the chemicals inlet opening (14) of chemicals feed line (12) and the dilution of diluted fluid feed line (18) are flowed out between opening (18) is between 1mm to 100mm.
13. equipment according to claim 12, is characterized in that, at least one chemicals feed line (12) and/or diluted fluid feed line (16) tilt relative to housing wall.
14. equipment according to claim 13, it is characterized in that, the angle (α 1, α 2) that at least one chemicals feed line (12) described and/or diluted fluid feed line (16) tilt relative to housing wall is between 90 ° to 10 °.
15. equipment according to claim 12 or 13, it is characterized in that, the dilution distance AB flowed out between opening (18) of the chemicals inlet opening (14) of chemicals feed line (12) and diluted fluid feed line (18) be in 1mm to mixing tube (20) diameter (d3) 1/4th between.
16. equipment according to claim 15, it is characterized in that, flow out pressure differential (δ p) between opening (18) diluted fluid out and fluid stream between 0.5bar to 5bar from dilution, and/or chemically product flow out opening (14) chemicals stream out relative to the pressure differential (δ p) flowed out from dilution between opening (18) diluent stream out between-0.2bar to 0bar.
17. equipment according to claim 13, is characterized in that, in the scope of the ratio between the bore of diluted fluid feed line (16) and the bore of chemicals feed line (12) between 1:1 to 20:1.
18. equipment according to claim 12, it is characterized in that, housing comprises for generation of turbulent flow and/or the shock surface (100.1,100.2,100.3,100.4,100.5,100.6) for chemicals rationing and/or diluted fluid rationing.
19. equipment according to claim 12, it is characterized in that, housing is formed as form of nozzle.
20. 1 kinds flowing into intrasystem chemicals feed system for being used in paper machine, it is characterized in that, for by chemicals, the device be supplied in process streams comprises according to claim 12 to the equipment in 19 described in one.
21. chemicals feed systems according to claim 20, wherein, described equipment is connected with process water retracting device by pipe, so that process water is used as second liquid.
CN201180033333.9A 2010-05-05 2011-04-14 For chemicals being mixed into the method and apparatus in process streams Expired - Fee Related CN103002977B (en)

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