EP0904806A1 - Dispositif mélangeur pour fluides - Google Patents

Dispositif mélangeur pour fluides Download PDF

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Publication number
EP0904806A1
EP0904806A1 EP97810719A EP97810719A EP0904806A1 EP 0904806 A1 EP0904806 A1 EP 0904806A1 EP 97810719 A EP97810719 A EP 97810719A EP 97810719 A EP97810719 A EP 97810719A EP 0904806 A1 EP0904806 A1 EP 0904806A1
Authority
EP
European Patent Office
Prior art keywords
housing
metering valve
extinguishing agent
wall
vortex
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
EP97810719A
Other languages
German (de)
English (en)
Other versions
EP0904806B1 (fr
Inventor
Frédéric Äbischer
Manfred Russwurm
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.)
General Electric Switzerland GmbH
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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
Priority to DE59708568T priority Critical patent/DE59708568D1/de
Priority to DK97810719T priority patent/DK0904806T3/da
Priority to EP97810719A priority patent/EP0904806B1/fr
Priority to PT97810719T priority patent/PT904806E/pt
Priority to ES97810719T priority patent/ES2185894T3/es
Application filed by ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Priority to CN98125007A priority patent/CN1102415C/zh
Priority to JP10278963A priority patent/JPH11165053A/ja
Publication of EP0904806A1 publication Critical patent/EP0904806A1/fr
Application granted granted Critical
Publication of EP0904806B1 publication Critical patent/EP0904806B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/008—Making of fire-extinguishing materials immediately before use for producing other mixtures of different gases or vapours, water and chemicals, e.g. water and wetting agents, water and gases
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C99/00—Subject matter not provided for in other groups of this subclass
    • A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
    • A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
    • 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
    • B01F25/40—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
    • 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
    • B01F25/4317—Profiled elements, e.g. profiled blades, bars, pillars, columns or chevrons
    • B01F25/43171—Profiled blades, wings, wedges, i.e. plate-like element having one side or part thicker than the other
    • 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
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/918—Counter current flow, i.e. flows moving in opposite direction and colliding

Definitions

  • the invention relates to a device for introducing CO 2 into a preferably liquid extinguishing medium, consisting essentially of a housing with an extinguishing agent supply line, a supply pipe for CO 2 provided with a metering valve, and an outlet line.
  • a device for introducing CO 2 into a preferably liquid extinguishing medium consisting essentially of a housing with an extinguishing agent supply line, a supply pipe for CO 2 provided with a metering valve, and an outlet line.
  • Such mixing devices are well known, for example from WO.95 / 24272.
  • the inert gas is usually added in gaseous form and also serves as a blowing agent for the extinguishing agent.
  • the inert gas is intermittently fed into the mixing device in order to achieve a defined plug flow in the feed line to the extinguishing nozzles.
  • Another known solution for manual fire extinguishers according to DE-U1 295 10 982 provides that CO 2 is added to the extinguishing agent at the extinguishing nozzle itself. This is to produce an aerosol-like mixture with water droplets brought to freezing temperature. It goes without saying that this measure cannot create a homogeneous bubble flow upstream of the extinguishing nozzle.
  • the invention has for its object to provide a mixing device of the type mentioned, in which a largely homogeneous two-phase mixture is generated with defined CO 2 bubbles, which predominate up to the downstream quenching nozzle. Another task is seen in providing a measure with which icing of the extinguishing agent on the occasion of the expansion of the liquid CO 2 is considerably avoided.
  • the housing is aligned vertically in its longitudinal axis, that the extinguishing agent supply line is connected to the housing at its lower end, that the outlet line branches off from the upper end of the housing, that the CO 2 supply pipe enters the housing from above flows out, extends at least approximately to its lower end and is provided with injection means at the pipe end, the CO 2 in the supply pipe being guided in countercurrent to the extinguishing agent and the length of the supply pipe between the metering valve and the injection device being such that during the Operation with the metering valve closed forms a gas cushion on its downstream side.
  • the advantages of the invention include the particular simplicity of the Measure to see.
  • the device is also very effective in one Operating pressure less than 12 bar. This means that the entire extinguishing system with the lines and fittings in it can be used for fire protection just 16 bar.
  • the feed pipe on its outer wall and / or the housing on its inner wall with three-dimensional vortex-generating Means is provided.
  • This allows large-scale longitudinal vertebrae are generated, the fast, controlled mixing of the flowing substances enable with short pressure loss within the shortest distance.
  • the element can usually by its hollow interior to be used, the inert gas in the extinguishing agent to flow through the channel.
  • the device consists of a housing 1 arranged vertically in its longitudinal axis, which in the simplest case can be a cylindrical, metallic tube. At its lower end, it is connected to an extinguishing agent supply line 2 via a commercially available attachment (not shown). At its upper end, the housing is penetrated by a supply pipe 4 for CO 2 provided with a metering valve 3, the metering valve being located directly outside the housing. A CO 2 connection 8 is provided upstream of this metering valve. Also from the upper end, an outlet line 5 leading to the extinguishing nozzles branches off from the housing.
  • the CO 2 supply pipe 4 extends coaxially to the lower end of the housing.
  • injection means 6 which in the simplest case are bores arranged regularly over the circumference of the pipe. It goes without saying that in this case the pipe end should be closed.
  • the feed pipe is designed in two parts, the part 4a adjoining the metering valve being made of a material with poor thermal conductivity and the part 4b adjoining the injection means being made of a material having good thermal conductivity. This is based on the following considerations, explained on the basis of the mode of operation:
  • Water is used as an extinguishing agent with a pressure between 4 and 10 bar, preferably 6 bar, and a temperature of preferably 10 ° C. Within the housing 1, a water speed of approximately 5 m / sec is considered favorable.
  • CO 2 is used as the inert gas, although other water-soluble agents are of course also conceivable.
  • the liquid CO 2 via a high pressure line, not shown, with a pressure of max. 70 bar fed in at a temperature of approx. 30 ° C.
  • the metering valve is used for the actual volume control. At the same time, it functions as a check valve when starting up and shutting down the system or during any intermittent operation.
  • the extinguishing agent penetrates from the housing 1 via the injection means 6 into the interior of the feed pipe 4 and rises therein. It compresses the gas column contained therein - which at least consists of air when starting up - and moves it against the metering valve 3 to form a gas cushion 7.
  • the gas cushion prevents water from contacting the metering valve reached. From this it can be seen that the feed tube 4 must not be less than a certain length in order to generate a suitable gas plug.
  • the gas cushion 7 must be dimensioned in such a way that even with the strongest turbulence in the water column, no water reaches the valve in order to avoid icing.
  • the liquid CO 2 is expanded to approx. 8 bar in the valve and can reach a temperature of -45 ° C. It goes without saying that any contact with water would immediately freeze it and would close the feed pipe.
  • the liquid inert gas penetrates the feed pipe and shifts the extinguishing agent column back into the housing via the gas cushion.
  • the CO 2 heats up and when it reaches its triple point, evaporation begins at least in part. This is the point of dividing the feed pipe 4 in two.
  • the part 4a adjoining the metering valve is preferably made of poorly conductive plastic in order to ensure the lowest possible heat exchange between the cold liquid inert gas flowing in countercurrent and water in the housing. In any case, it is important to avoid that icing, also local, occurs in the interior of the housing in this area. On the other hand, to promote the heating and evaporation of the inert gas further downstream, a material with good thermal conductivity is selected here in part 4b.
  • the injection means which are radial bores or a screen-like attachment can be dimensioned such that when the inert gas is injected into the channel through which the extinguishing agent flows is a homogeneous fine distribution of the Gases in water with the smallest possible gas bubbles. However, this is on it to ensure that the nozzle bores are large enough to accommodate a Avoid freezing the openings with certainty.
  • the first step is to add as much gas solve as possible; The goal is to achieve the saturation state of the mixture.
  • the mixture tends to depend on the respective pressure and temperature to evaporate; a pressure loss in the line therefore leads to evaporation Episode.
  • a pressure loss in the line therefore leads to evaporation Episode.
  • degassing the dissolved inert gas part of the pressure drop becomes compensated.
  • the evaporation causes an increase in volume.
  • such a vortex generator essentially exists from three freely flowing triangular surfaces. These are a roof surface 10 and two side surfaces 11 and 13. These surfaces run in their longitudinal extent at certain angles in the direction of flow.
  • the side walls which consist of right triangles, are with their Long sides fixed on the housing wall 21. They are so oriented to them their narrow sides form a joint, including an arrow angle ⁇ .
  • ⁇ is designed as a sharp connecting edge 16 and is also vertical to that wall 21 with which the side surfaces are flush. In one Channel installed, the flow cross-section becomes due to the sharp connecting edge hardly affected by blocking.
  • the two enclosing the arrow angle ⁇ Side surfaces 11, 13 are symmetrical in shape, size and orientation and are arranged on both sides of an axis of symmetry 17. This axis of symmetry 17 is the same direction as the channel axis.
  • the roof surface 10 lies with a wall extending transversely to the wall and very flat edge 15 on the same wall 21 as the side walls 11, 13. Their longitudinal edges 12, 14 are flush with those in the Flow channel protruding longitudinal edges of the side surfaces.
  • the Roof surface runs at an angle ⁇ to wall 21. Its longitudinal edges 12, 14 together with the connecting edge 16 form a tip 18.
  • the connecting edge 16 of the two side surfaces 11, 13 forms the downstream edge of the vortex generator 9.
  • the cross to the flow around the wall 21 extending edge 15 of the roof surface 10 is thus that of the channel flow edge applied first.
  • the vortex generator works as follows: When flowing around the At edges 12 and 14 the flow is converted into a pair of opposing vortices. The vortex axes lie in the axis of the flow. The geometry of the Vortex generators are selected so that there are no backflow zones during vortex generation arise.
  • the swirl number of the vortex is determined by a corresponding choice of the angle of attack ⁇ and / or the arrow angle ⁇ . With increasing angles, the vortex strength becomes or the number of twists and the location of the vortex break (vortex break down) - if this is desired at all - migrates upstream to in the area of the vortex generator itself. Depending on the application, these are two Angle ⁇ and ⁇ due to constructional conditions and the process itself given. Then only the height of the vortex generator has to be adjusted, which corresponds to that of the connecting edge 16.
  • the height h of this connecting edge 16 becomes the channel height H vote that the vortex generated is immediately downstream of the vortex generator already reached such a size that the full channel height or filled the full height of the channel part assigned to the vortex generator becomes what leads to an even distribution in the loaded cross section leads.
  • Another criterion which influences the chosen ratio h / H can take is the pressure drop that flows around the vortex generator occurs. It goes without saying that with a larger ratio h / H the Pressure loss coefficient increases.
  • the sharp connecting edge 16 in FIG. 3 is that point which is acted upon first by the channel flow.
  • the element is 180 ° turned.
  • Vortex changed their sense of rotation. They rotate along and above the roof surface strive towards the wall on which the vortex generator is mounted.
  • the housing wall 21 there are a number of vortex generators 9 in the circumferential direction strung together with or without spaces.
  • the height h of the elements 9 is approximately 90% of the channel height H. It can also be in several levels of the housing such vortex generators staggered evenly or axially to be ordered.
  • the invention is of course not limited to the exemplary embodiment shown and described.
  • a water-foam mixture would also be conceivable.
  • CO 2 in addition to CO 2 .
  • nitrogen or air can also be used as the inert gas. Larger variations in the values specified for extinguishing agents and inert gas are also possible. Basically, the higher the water pressure and the lower the water temperature, the more CO 2 can be dissolved.
  • vortex-generating elements other than the vortex generators shown can also be used; basically all static mixers are suitable, provided their pressure drop is not too great.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Nozzles (AREA)
  • Accessories For Mixers (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP97810719A 1997-09-30 1997-09-30 Dispositif mélangeur pour fluides Expired - Lifetime EP0904806B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DK97810719T DK0904806T3 (da) 1997-09-30 1997-09-30 Anordning til blanding af fluider
EP97810719A EP0904806B1 (fr) 1997-09-30 1997-09-30 Dispositif mélangeur pour fluides
PT97810719T PT904806E (pt) 1997-09-30 1997-09-30 Disposiyivo de mistura de fluidos
ES97810719T ES2185894T3 (es) 1997-09-30 1997-09-30 Dispositivo de mezclado para fluidos.
DE59708568T DE59708568D1 (de) 1997-09-30 1997-09-30 Mischvorrichtung für Fluide
CN98125007A CN1102415C (zh) 1997-09-30 1998-09-29 液体混合装置
JP10278963A JPH11165053A (ja) 1997-09-30 1998-09-30 流体のための混合装置及び、混合装置の運転方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97810719A EP0904806B1 (fr) 1997-09-30 1997-09-30 Dispositif mélangeur pour fluides

Publications (2)

Publication Number Publication Date
EP0904806A1 true EP0904806A1 (fr) 1999-03-31
EP0904806B1 EP0904806B1 (fr) 2002-10-23

Family

ID=8230408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810719A Expired - Lifetime EP0904806B1 (fr) 1997-09-30 1997-09-30 Dispositif mélangeur pour fluides

Country Status (7)

Country Link
EP (1) EP0904806B1 (fr)
JP (1) JPH11165053A (fr)
CN (1) CN1102415C (fr)
DE (1) DE59708568D1 (fr)
DK (1) DK0904806T3 (fr)
ES (1) ES2185894T3 (fr)
PT (1) PT904806E (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1078653A1 (fr) 1999-08-24 2001-02-28 Asea Brown Boveri Ag Dispositif pour introduire un gaz inerte dans un agent extincteur de feu
WO2008139417A3 (fr) * 2007-05-14 2009-05-22 Air Liquide Systèmes et procédés de mélange de fluides
CN113522079A (zh) * 2021-08-19 2021-10-22 齐喝彩(常熟)信息科技有限公司 一种饮料机粉末状原料配比混合装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4658359B2 (ja) * 2001-03-15 2011-03-23 株式会社初田製作所 消火方法及び消火装置
FI20105231L (fi) * 2010-03-10 2011-09-11 Wetend Technologies Oy Menetelmä ja reaktori yhden tai useamman kemikaalin sekoittamiseksi prosessinestevirtaukseen
JP6218868B2 (ja) * 2015-07-13 2017-10-25 Ｊｆｅエンジニアリング株式会社 気液混合器
JP6218867B2 (ja) * 2015-07-13 2017-10-25 Ｊｆｅエンジニアリング株式会社 凝縮設備
WO2018131104A1 (fr) * 2017-01-12 2018-07-19 Ｊｆｅエンジニアリング株式会社 Mélangeur gaz-liquide
CN114192040A (zh) * 2021-12-22 2022-03-18 徐州克林斯曼安防科技有限公司 一种适用于锂离子电池灭火剂的生产方法
DE102022117315A1 (de) * 2022-07-12 2024-01-18 Messer Se & Co. Kgaa Vorrichtung zum Erzeugen eines temperierten, kalten Gasstroms
KR102727285B1 (ko) * 2023-04-28 2024-11-11 주식회사 동화엔텍 재액화 장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2608438A1 (fr) * 1986-12-23 1988-06-24 Sterlini Jacques Dispositif de lutte contre l'incendie
WO1994008659A1 (fr) * 1992-10-20 1994-04-28 Sundholm Goeran Procede et installation de lutte contre le feu
WO1995024272A1 (fr) 1994-03-06 1995-09-14 Sealflock Aktiebolag Procede et dispositif d'application de fibres sur une surface
DE29510982U1 (de) 1995-07-13 1995-09-21 Broemme, Albrecht, Dipl.-Ing., 12203 Berlin Feuerlöscher

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315491A (en) * 1992-09-30 1994-05-24 American Ingenuity, Inc. Reflecting and luminous layered material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2608438A1 (fr) * 1986-12-23 1988-06-24 Sterlini Jacques Dispositif de lutte contre l'incendie
WO1994008659A1 (fr) * 1992-10-20 1994-04-28 Sundholm Goeran Procede et installation de lutte contre le feu
WO1995024272A1 (fr) 1994-03-06 1995-09-14 Sealflock Aktiebolag Procede et dispositif d'application de fibres sur une surface
DE29510982U1 (de) 1995-07-13 1995-09-21 Broemme, Albrecht, Dipl.-Ing., 12203 Berlin Feuerlöscher

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1078653A1 (fr) 1999-08-24 2001-02-28 Asea Brown Boveri Ag Dispositif pour introduire un gaz inerte dans un agent extincteur de feu
WO2008139417A3 (fr) * 2007-05-14 2009-05-22 Air Liquide Systèmes et procédés de mélange de fluides
CN113522079A (zh) * 2021-08-19 2021-10-22 齐喝彩(常熟)信息科技有限公司 一种饮料机粉末状原料配比混合装置

Also Published As

Publication number Publication date
CN1218701A (zh) 1999-06-09
ES2185894T3 (es) 2003-05-01
CN1102415C (zh) 2003-03-05
JPH11165053A (ja) 1999-06-22
PT904806E (pt) 2003-03-31
DK0904806T3 (da) 2003-02-24
DE59708568D1 (de) 2002-11-28
EP0904806B1 (fr) 2002-10-23

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