GB2290725A - Static mixer for liquids having regulated gas inlet - Google Patents
Static mixer for liquids having regulated gas inlet Download PDFInfo
- Publication number
- GB2290725A GB2290725A GB9413114A GB9413114A GB2290725A GB 2290725 A GB2290725 A GB 2290725A GB 9413114 A GB9413114 A GB 9413114A GB 9413114 A GB9413114 A GB 9413114A GB 2290725 A GB2290725 A GB 2290725A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquid
- liquids
- mixing
- chamber
- gas inlet
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
- B01J19/2405—Stationary reactors without moving elements inside provoking a turbulent flow of the reactants, such as in cyclones, or having a high Reynolds-number
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J14/00—Chemical processes in general for reacting liquids with liquids; Apparatus specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00162—Controlling or regulating processes controlling the pressure
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
Abstract
Apparatus for mixing two or more liquids comprises liquid inlets (20, 30), a liquid outlet (40) and a gas inlet (50), means being provided for regulating the pressure of the gas at the gas inlet. The lower section (3) of the mixing apparatus contains liquid with a surface (5), and the upper section (4) contains gas. The liquid inlets (20, 30) are located in the lower section (3), and the gas inlet (50) is located in the upper section (4). The mouths (121, 131, Figs. 2 and 3) of the liquid inlets (20, 30) may be directed towards each other. <IMAGE>
Description
MIXING APPARATUS FOR LIQUIDS
The requirement to mix liquids in continuous chemical processing is widespread in all branches of chemical engineering, and consequently many mixing devices are commercially available to do this. Many of these mixing devices are specifically adapted to suit certain process needs.
Mixers used in continuous processing may be characterised either as dynamic mixers or as static mixers. In the case of dynamic mixers an external source of energy provides the work needed to thoroughly and intimately mix two or more liquids. Typically the work is done on the liquids by means of a rotor, or a series of rotors which are driven from an external source. In the case of static mixers it is the kinetic energy of the liquids themselves that provides the work needed to mix them.
A particular kind of static mixer, which is known in the prior art for mixing gases comprises a chamber with a mechanical device for damping out pressure fluctuations.
One such device is described in
EP117699, published on 5th September, 1984, which discloses a chamber for mixing gases (in particular anaesthetic gases for medical purposes). The chamber has multiple inlets and a single outlet.
It is an aim of the present invention to provide an apparatus which acts as a static mixer, and which is specifically adapted for use to mix liquids.
It is a further aim of the present invention to provide an apparatus which acts simultaneously as a mixer and a pressure pulsation damper for-liquids.
These aims are achieved by means of an apparatus comprising a mixing vessel with two or more inlets, and a single outlet. Each one of the liquids to be mixed is introduced into the mixing vessel through an inlet. The inlets may be oriented in a manner suitable to maximise the mixing effect.
The mixing vessel also acts as a pressure pulsation damper due to the presence of a gas pocket above the liquid surface.
Summary of the Invention
An apparatus for mixing two or more liquids comprising a mixing chamber, two or more liquid inlets, and a liquid outlet; wherein the mixing chamber further comprises a gas inlet, and a means for regulating the pressure of the gas at the gas inlet.
The lower section of the mixing chamber contains liquid or liquids, and the upper section of the mixing chamber contains gas. Preferably the liquid inlets are located in the lower section of the mixing chamber, and the gas inlet is located in the upper section of the mixing chamber.
In a preferred embodiment of the invention the mixing chamber is in the form of a cylinder, the axis of the cylinder being vertically oriented, said cylinder having a top wall and a bottom wall. The mouth of said liquid outlet is positioned closer to the top wall than the bottom wall within the cylindrical chamber.
In a more preferred embodiment two liquid inlets are oriented such that the mouths of said inlets are substantially opposed and aligned on substantially the same axis. The distance between the opposing mouths of the liquid inlets being not more than 5 times the diameter of the internal diameter largest liquid inlet.
Detailed Description of the Invention
The mixer of the present invention has a number of advantages. It is a static mixer (i.e. a mixer with no moving parts) which nevertheless has the effect of a dynamic mixer. It is therefore inexpensive to manufacture, operate and maintain. It also has a very high mixing efficiency and is equally effective for mixing very small amounts of liquid at low throughput rates and very high amounts of liquid at high throughput rates.
Unlike other static mixers, the mixer of the present invention presents little or no obstacle to the liquid flow and there is therefore no pressure drop between the inlet and outlet of the mixer (i.e. no "backpressure")
The mixer of the present invention can be used to mix liquids in the preparation of foodstuffs, detergents etc.
Furthermore the mixer can be used to intimately mix two or more components which are chemically reactive. The chemical reaction is then started (and may even be completed) in the chamber of the mixer itself.
The mixing chamber may be jacketed, either for heating or for cooling. Heating may be desirable if it is required to promote a chemical reaction in the mixer. Cooling may be desirable if an exothermic reaction is producing heat in the mixer.
The effectiveness of mixing will be influenced by many parameters including the inlet pressures, and the velocity of the liquids when they are introduced into the mixing chamber, as well as the dimensions of the chamber and the number and orientation of the liquid inlets
The invention will now be described by way of example and with reference to the accompanying drawings in which
Figure 1 is a sectional view of a mixer of the present invention viewed from the side.
Figure 2 shows a plan view of a preferred embodiment of the present invention, with the top of the chamber removed.
Figure 3 is a sectional view A-A, showing detail of a modified arrangement of liquid inlets of the preferred embodiment of figure 2.
The mixer 1 of figure 1 comprises a closed cylindrical chamber 2 having a height of 400mm and a diameter of 30mm.
There are two liquid inlets to the chamber 20, 30, both of which are pipes having an internal diameter of 12mm, and both of which discharge into the chamber at a height of SOinin above the base of the chamber. A liquid outlet 40 from the chamber is also provided, also having an internal diameter of 12mm. The mouth 41 of the liquid outlet is positioned 300mm above the base of the chamber.
The liquid outlet of the chamber effectively divides the chamber into a lower section 3 which is liquid filled, and an upper section 4 which is gas filled. The boundary between the upper and lower sections of the chamber is defined by the liquid surface, "S". The liquid surface is typically in the form of a vortex, the apex of the vortex being located at the mouth 41 of the liquid outlet 40.
The upper section 4 of the chamber is filled with gas under pressure. A gas inlet 50 and a pressure gauge 60 are provided in the upper section of the chamber wall. Valves 22, 32 and 42 are provided on each of the liquid inlets 20, 30, and the liquid outlet 40 in order to be able to regulate the flow of liquids into and out of the mixer. A valve 52 is provided on the gas inlet 50. This valve 52 will normally be closed in steady state operation in order to isolate the gas in the upper section 4 of the chamber from the gas supply. A pressure regulator (not shown) is also included in order to control (either automatically or manually) the gas pressure in the upper section of the mixing chamber.
Figures 2 and 3 show a similar mixer to figure 1, in which the orientation of the two liquid inlets 20, 30 has been modified to improve the mixing effect. The mouths 121, 131 of the liquid inlets ensure that the flow of liquid from one of the inlets is directed towards the mouth of the other inlet. This orientation generates high relative velocity of one incoming liquid to the other thereby maximising the kinetic mixing effect. In figure 2, the mouths 121, 131 of the liquid inlets are positioned 30 mm apart.
The dimensions of the embodiment described above are those of one particular embodiment of the invention. However, the man skilled in the art will appreciate that the detailed design of any given mixer will require appropriate choice of overall size and relative dimensions of the mixing apparatus depending on the process parameters, such as throughput, number of liquids to be mixed, fluid flow properties of the liquids to be mixed etc.
Furthermore the mixing apparatus may be made from any suitable material of construction. The choice will be determined by the liquids to be used (corrosivity considerations etc.), the operating temperature, required pressure etc. Some suitable materials of construction are carbon steel, stainless steel, aluminium, glass, perspex, and polymeric materials such as polyester etc.
Any gas may be used in the upper section of the chamber.
Nitrogen and air are particularly suitable gasses.
Claims (6)
1. An apparatus for mixing two or more liquids comprising a mixing chamber (1), two or more liquid inlets (20, 30), a liquid outlet (40) and characterised in that the mixing chamber (1) further comprises a gas inlet (50), and a means for regulating the pressure of the gas at the gas inlet.
2. An apparatus according to claim 1, wherein a lower section (3) of the mixing chamber contains a liquid or a mixture of liquids, and an upper section (4) of the mixing chamber contains gas, and wherein said liquid inlets (20,30) are located in the lower section (3) of the mixing chamber, and said gas inlet (50) is located in the upper section (4) of the mixing chamber.
3. An apparatus according to claim 2, wherein the mixing chamber is generally in the form of a cylinder, the axis of the cylinder being vertically oriented, said cylinder having a top wall (5) and a bottom wall (6).
4. An apparatus according to claim 3, wherein the liquid outlet (40) has a mouth (41), and wherein said mouth of said liquid outlet (40) is positioned closer to the top wall (5) than the bottom wall (6) within the cylindrical chamber (1).
5. An apparatus according to claim 2, wherein two liquid inlets (20, 30) are oriented such that the mouths of said inlets (121, 131) are substantially opposed and aligned on substantially the same axis.
6. An apparatus according to claim 5, wherein the distance between the opposing mouths of the liquid inlets (121, 131) is not more than 5 times the internal diameter of the largest liquid inlet.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9413114A GB2290725A (en) | 1994-06-30 | 1994-06-30 | Static mixer for liquids having regulated gas inlet |
PCT/US1995/007656 WO1996000609A1 (en) | 1994-06-30 | 1995-06-16 | Mixing apparatus for liquids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9413114A GB2290725A (en) | 1994-06-30 | 1994-06-30 | Static mixer for liquids having regulated gas inlet |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9413114D0 GB9413114D0 (en) | 1994-08-24 |
GB2290725A true GB2290725A (en) | 1996-01-10 |
Family
ID=10757552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9413114A Withdrawn GB2290725A (en) | 1994-06-30 | 1994-06-30 | Static mixer for liquids having regulated gas inlet |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2290725A (en) |
WO (1) | WO1996000609A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2125308A (en) * | 1982-07-30 | 1984-03-07 | Polyrim Mfg | Apparatus for nucleating a liquid chemical constituent of a reaction injection molding system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2976024A (en) * | 1954-10-06 | 1961-03-21 | Pure Oil Co | Apparatus for preparing colloidal dispersions |
CA906995A (en) * | 1972-03-09 | 1972-08-08 | S. Troope Walter | Method for mixing liquid ammonia with conventional dyes and other conventional fabric-finishing materials |
JPS60172340A (en) * | 1984-02-16 | 1985-09-05 | Mitsubishi Heavy Ind Ltd | Method and apparatus for treating and blending of liquid |
US5124088A (en) * | 1990-09-04 | 1992-06-23 | Stumphauzer William C | Process and apparatus for rapidly carbonating water |
-
1994
- 1994-06-30 GB GB9413114A patent/GB2290725A/en not_active Withdrawn
-
1995
- 1995-06-16 WO PCT/US1995/007656 patent/WO1996000609A1/en active Search and Examination
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2125308A (en) * | 1982-07-30 | 1984-03-07 | Polyrim Mfg | Apparatus for nucleating a liquid chemical constituent of a reaction injection molding system |
Also Published As
Publication number | Publication date |
---|---|
GB9413114D0 (en) | 1994-08-24 |
WO1996000609A1 (en) | 1996-01-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7416172B2 (en) | Submerged gas evaporators and reactors | |
KR100397268B1 (en) | Sludge phase reactor and its use | |
JPH0747262A (en) | Gas-liquid reactor | |
JP2005538832A (en) | Apparatus and method for high shear mixing and reaction of materials | |
Rushton et al. | Holdup and flooding in air liquid mixing | |
JP5466009B2 (en) | Improved flow reactor | |
RU2187768C2 (en) | Method for intensification of heat exchange at combustion of solid, liquid or gaseous fuel and heating device for its realization (modifications) | |
GB2290725A (en) | Static mixer for liquids having regulated gas inlet | |
CN206823788U (en) | A kind of kitchen cleaner special reactor | |
US3945806A (en) | Reactor-generator | |
US4982373A (en) | Fluid agitator | |
CN208346099U (en) | Waste plastic oil-refining equipment | |
US3934857A (en) | Mixing and heat transfer apparatus | |
WO2003089122A1 (en) | Device and method of creating hydrodynamic cavitation in fluids | |
US6028882A (en) | Claus unit cooling and heat recovery system | |
US5650100A (en) | Apparatus for providing absorption of gaseous and liquid phases | |
JPS62258924A (en) | Combustion furnace nozzle device | |
JPH0634057A (en) | Material valve for bulk cargo or liquid | |
CN216936055U (en) | Explosion-proof type reation kettle for industrial chemical industry | |
CN100341613C (en) | Device for the removal of dangerous or high-energy material | |
SU1708407A1 (en) | Cone-type crusher | |
SU1535849A1 (en) | Apparatus for aerating a liquid | |
CN110358569A (en) | Waste plastic oil-refining equipment | |
CN216799838U (en) | Deoxidation closed reaction device | |
US5045246A (en) | Suction device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |