SE526819C2 - System and method for admixing a liquid medium in a liquid stream - Google Patents
System and method for admixing a liquid medium in a liquid streamInfo
- Publication number
- SE526819C2 SE526819C2 SE0400800A SE0400800A SE526819C2 SE 526819 C2 SE526819 C2 SE 526819C2 SE 0400800 A SE0400800 A SE 0400800A SE 0400800 A SE0400800 A SE 0400800A SE 526819 C2 SE526819 C2 SE 526819C2
- Authority
- SE
- Sweden
- Prior art keywords
- liquid
- flow
- pipeline
- pump
- mixing
- Prior art date
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/49—Mixing systems, i.e. flow charts or diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
- B01F25/51—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is circulated through a set of tubes, e.g. with gradual introduction of a component into the circulating flow
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- B01F3/0865—
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- B01F3/088—
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- B01F5/0602—
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
- D21C11/0028—Effluents derived from the washing or bleaching plants
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Dispersion Chemistry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Pipeline Systems (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
20 25 30 526 819 2 Det finns många exempel på olika tillämpningar där man önskar blanda in ett vätskeformigt medium i ett annat vätskeformigt flöde. Man kan exempelvis vilja öka koncentrationen av ett ämne i ett flöde. Inom massaindustrin finns ofta ett behov av att utföra pH-justeringar. Ett exempel är t.ex. vid återanvändning av alkaliska tvättfiltrat som spädvatten på andra ställen i processen. Man önskar då sänka filtratets pH-värde och detta utförs genom tillsats av sura vätskor, ofta svavelsyra. There are many examples of different applications where it is desired to mix a liquid medium into another liquid flow. For example, you may want to increase the concentration of a substance in a flow. In the pulp industry, there is often a need to make pH adjustments. An example is e.g. when reusing alkaline wash filtrates as diluent elsewhere in the process. It is then desired to lower the pH value of the filtrate and this is done by adding acidic liquids, often sulfuric acid.
Svavelsyra är starkt korrosiv och kan lätt skada utrustning den kommer i kontakt med. Att tillverka alla rörledningar och annan apparatur i syrabeständigt material är mycket kostsamt. För att svavelsyran ska vara ickekorrosiv bör den spädas ungefär 100 ggr från koncentrerad form.Sulfuric acid is highly corrosive and can easily damage equipment it comes in contact with. Manufacturing all pipelines and other equipment in acid-resistant material is very expensive. In order for the sulfuric acid to be non-corrosive, it should be diluted approximately 100 times from concentrated form.
Ett alternativ som idag används för pH-justering av filtrat är att tillsätta syra direkt till ett filtratrör och sedan låta en inspädningsskruv utgöra den enda inblandningen. Vid tillsats av korrosiva vätskor såsom svavelsyra kan dock detta orsaka problem med korrosion och att tillverka hela skruven i syrabeständigt material är som tidigare nämnt kostsamt. En lösning på detta problem är att använda en separat inblandningsanordning som kan tillverkas i syrabeständigt material.An alternative currently used for pH adjustment of filtrates is to add acid directly to a filtrate tube and then let a diluent screw be the only mixture. However, when adding corrosive liquids such as sulfuric acid, this can cause problems with corrosion and, as previously mentioned, manufacturing the entire screw in acid-resistant material is costly. One solution to this problem is to use a separate mixing device that can be made of acid-resistant material.
Uppfinningen syftar till att åstadkomma ett system för och ett förfarande för energisnål inblandning av ett vätskeformigt medium i ett vätskeformigt flöde utan att använda dyr inblandningsutrustning och samtidigt undvika problem med att hög pumpkapacitet krävs. Uppfinningen syftar också till att undvika korrosionsproblem vid inblandning av korrosiva vätskor, exempelvis i samband med pH-justering.The object of the invention is to provide a system for and a method for energy-efficient mixing of a liquid medium in a liquid flow without using expensive mixing equipment and at the same time avoiding problems with high pump capacity being required. The invention also aims to avoid corrosion problems when mixing in corrosive liquids, for example in connection with pH adjustment.
Uppfinningen löser de ovannämnda problemen genom att blandningssystemet designas så att inblandningen av det vätskeformiga mediet sker i en mindre delström som sedan 10 15 20 25 30 526 819 3 återförs till huvudströmmen. Delströmmen tas av i en position efter pumpen i flödesriktningen och âterförs till huvudströmmen i en position belägen före pumpen. Eftersom inblandningsanordningen inte monteras i huvudflödet uppstår inget tryckfall som skulle medföra krav på högre pumpkapacitet.The invention solves the above-mentioned problems by designing the mixing system so that the mixing of the liquid medium takes place in a smaller partial stream which is then returned to the main stream. The substream is taken off in a position after the pump in the flow direction and returned to the main stream in a position located before the pump. Since the mixing device is not mounted in the main flow, no pressure drop occurs which would require higher pump capacity.
Pumpen måste klara ett något högre flöde jämfört med om pumpen och inblandningsanordningen monterats i serie men tryckfallet blir mindre vilket totalt sett ger en energibesparing. Den inblandningsanordning som används kan också göras mycket mindre.The pump must be able to handle a slightly higher flow compared to if the pump and the mixing device are mounted in series, but the pressure drop will be smaller, which overall provides an energy saving. The mixing device used can also be made much smaller.
I de fall inblandningsanordningen används för att tillsätta en korrosiv vätska är materialbesparingen av särskild vikt eftersom man kan minska mängden av kostsamt syrabeständigt material.In cases where the mixing device is used to add a corrosive liquid, the material saving is of particular importance because the amount of costly acid-resistant material can be reduced.
Uppfinningen ska nu beskrivas närmare med utgångspunkt i figurerna.The invention will now be described in more detail on the basis of the figures.
Figur 1 visar en utföringsform av uppfinningen.Figure 1 shows an embodiment of the invention.
Figur 2 visar ett där och blandningssystem pump inblandningsanordning monterats i serie.Figure 2 shows a there and mixing system pump mixing device mounted in series.
I figur l visas ett flöde Q som strömmar i en första rörledning 1 i vilken en pump 2 placerats. Efter pumpen, i flödesriktningen, är en andra rörledning 3 ansluten till rörledningen i vilken en delström avleds. Rörledningen 3 sträcker sig från en första position placerad efter pumpen till en andra position belägen före pumpen, och bildar pà så sätt en att till huvudflödet i rörledningen 1 i en position före pumpen. Den rörslinga så den avledda delströmmen återförs andra rörledningen har en mindre diameter än den första rörledningen. I den andra rörledningen 3 är en inblandningsanordning 4 placerad för inblandning av det vätskeformiga mediet. alternativet att Figur 2 illustrerar, för jämförande syften, installera en inblandningsanordning 4' direkt efter pumpen 2'. 10 15 20 25 30 526 819 4 Följande exempel utgör en utföringsform av uppfinningen.Figure 1 shows a flow Q flowing in a first pipeline 1 in which a pump 2 is placed. After the pump, in the flow direction, a second pipeline 3 is connected to the pipeline in which a substream is diverted. The pipeline 3 extends from a first position located after the pump to a second position located before the pump, and thus forms one to the main flow in the pipeline 1 in a position before the pump. The pipe loop so that the diverted substream is returned to the second pipeline has a smaller diameter than the first pipeline. In the second pipeline 3 a mixing device 4 is placed for mixing the liquid medium. the alternative that Figure 2 illustrates, for comparative purposes, installing a mixing device 4 'directly after the pump 2'. The following examples constitute an embodiment of the invention.
Exemplet baserar sig på inblandning av svavelsyra till ett filtratflöde.The example is based on mixing sulfuric acid into a filtrate stream.
Exempel 1: I en exemplifierande utföringsform är det ingående flödet Q looomß/h. designas så att den klarar ett flöde av 1,lQ, dvs 1l00m3/h. En Trycket över pumpen är 2 bar och pumpen delström av 0,1Q avleds i den mindre rörledningen 3. Tillsats av svavelsyra sker till delströmmen i en ungefärlig storlek av 0,00lQ via inblandningsanordningen 4. Eftersom inblandningen av svavelsyra sker i den lilla delströmmen uppstår aldrig något tryckfall i det större röret utan trycket i utgående rörledning är fortfarande 2 bar. Det utgående flödet uppgår till l,00lQ.Example 1: In an exemplary embodiment, the input flow Q is looomß / h. designed so that it can handle a flow of 1, lQ, ie 1l00m3 / h. A The pressure across the pump is 2 bar and the pump partial flow of 0.1Q is diverted in the smaller pipeline 3. Sulfuric acid is added to the partial stream in an approximate size of 0.00lQ via the mixing device 4. Since the mixing of sulfuric acid takes place in the small partial stream never occurs any pressure drop in the larger pipe without the pressure in the outgoing pipeline is still 2 bar. The outgoing flow amounts to 1.00lQ.
Delströmmen och det tillsatta vätskeformiga mediet kan givetvis variera i storlek gentemot huvudflödet.The partial stream and the added liquid medium can of course vary in size relative to the main flow.
Om man jämför samma flöden i ett system enligt figur 2 måste pumpen i detta fall ha en tryckkapacitet pà 3 bar för att klara tryckfallet Efter utförd inblandning är trycket i rörledningen 2 bar och flödet l,OO1Q över inblandningsanordningen. precis som i det första alternativet enligt figur 1.If one compares the same flows in a system according to Figure 2, the pump in this case must have a pressure capacity of 3 bar to cope with the pressure drop. just as in the first option according to figure 1.
Med ett system enligt figur 1 krävs 20% mindre energi för att pumpa vätskan genom rörledningen jämfört med systemet i figur 2 eftersom pumpens totala effektbehov minskar. Dessutom kan inblandningsanordningen göras mindre då den enligt uppfinningen placeras i ett flöde som är mindre än, i den exemplifierande utföringsformen endast en tiondel av, det totala vätskeflödet.With a system according to Figure 1, 20% less energy is required to pump the liquid through the pipeline compared to the system in Figure 2 because the pump's total power requirement decreases. In addition, the mixing device can be made smaller when, according to the invention, it is placed in a flow which is less than, in the exemplary embodiment only one tenth of, the total liquid flow.
Inblandningsanordningen kan då tillverkas i syrabeständigt material till en rimlig kostnad.The mixing device can then be manufactured in acid-resistant material at a reasonable cost.
Givetvis ska inte uppfinningen begränsas till en utföringsform som utgörs av dessa räkneexempel utan kan varieras inom ramen för patentkraven.Of course, the invention should not be limited to an embodiment which consists of these calculation examples but can be varied within the scope of the claims.
Claims (2)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0400800A SE526819C2 (en) | 2004-03-26 | 2004-03-26 | System and method for admixing a liquid medium in a liquid stream |
PCT/SE2005/000374 WO2005092484A1 (en) | 2004-03-26 | 2005-03-16 | System and method for admixing a liquid state medium to a liquid state flow |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0400800A SE526819C2 (en) | 2004-03-26 | 2004-03-26 | System and method for admixing a liquid medium in a liquid stream |
Publications (3)
Publication Number | Publication Date |
---|---|
SE0400800D0 SE0400800D0 (en) | 2004-03-26 |
SE0400800L SE0400800L (en) | 2005-09-27 |
SE526819C2 true SE526819C2 (en) | 2005-11-08 |
Family
ID=32067542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE0400800A SE526819C2 (en) | 2004-03-26 | 2004-03-26 | System and method for admixing a liquid medium in a liquid stream |
Country Status (2)
Country | Link |
---|---|
SE (1) | SE526819C2 (en) |
WO (1) | WO2005092484A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3710817A (en) * | 1970-02-03 | 1973-01-16 | Anzen Prod | Multiple solutes additive apparatus |
JPS5858562B2 (en) * | 1980-10-13 | 1983-12-26 | スタ−エンジニアリング アプリケ−シヨンズ リミテツド | fuel mixing device |
US4481130A (en) * | 1981-06-24 | 1984-11-06 | The British Petroleum Company Limited | Method for demulsifying water-in-oil emulsions |
WO1991000561A1 (en) * | 1989-07-05 | 1991-01-10 | Nauchno-Proizvodstvennaya Assotsiatsia 'transsonik' | System for dosing and mixing liquid components of a mixture |
-
2004
- 2004-03-26 SE SE0400800A patent/SE526819C2/en not_active IP Right Cessation
-
2005
- 2005-03-16 WO PCT/SE2005/000374 patent/WO2005092484A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
SE0400800L (en) | 2005-09-27 |
WO2005092484A1 (en) | 2005-10-06 |
SE0400800D0 (en) | 2004-03-26 |
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Legal Events
Date | Code | Title | Description |
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NUG | Patent has lapsed |