EP4265338A1 - Cyclone et un système de traitement des aliments comportant le cyclone - Google Patents

Cyclone et un système de traitement des aliments comportant le cyclone Download PDF

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Publication number
EP4265338A1
EP4265338A1 EP22169514.1A EP22169514A EP4265338A1 EP 4265338 A1 EP4265338 A1 EP 4265338A1 EP 22169514 A EP22169514 A EP 22169514A EP 4265338 A1 EP4265338 A1 EP 4265338A1
Authority
EP
European Patent Office
Prior art keywords
cyclone
inlet
chamber
outlet
fluid
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Withdrawn
Application number
EP22169514.1A
Other languages
German (de)
English (en)
Inventor
Tomas Skoglund
Staffan VESTBERG
Johan Persson
Göran Pantzar
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Priority to EP22169514.1A priority Critical patent/EP4265338A1/fr
Publication of EP4265338A1 publication Critical patent/EP4265338A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/02—Construction of inlets by which the vortex flow is generated, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission
    • B04C5/04—Tangential inlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/107—Cores; Devices for inducing an air-core in hydrocyclones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations

Definitions

  • the invention is related to a cyclone.
  • a cyclone that can be used on a processing system like a food processing system.
  • Cyclones are separation devices employing the principle of inertia to remove particulate matter from gases.
  • a flash boiling stage may be included for several reasons. For example, when heat treating a liquid food product by steam injection for killing microorganisms, the product is held at a heat treatment temperature for a few seconds before it is introduced into a vacuum vessel to be flash boiled, or flash cooled. The flash boiling reduces the temperature of the product and removes an amount of vapor that equals the amount of steam that was injected for the heat treatment.
  • Flash boiling may also be used when it is desired to increase the concentration of a liquid food product.
  • the product is then introduced in a vacuum vessel that acts as an evaporator, where vapor is removed by virtue of the flash boiling that takes place in the vessel.
  • the flash boilers and/or cyclones have vortex breakers preventing the formation of vortices and of a separated portion being drawn into the outlet of the other portion.
  • the invention provides an additional improvement, an additional advantage, or an alternative to the prior art.
  • the purpose of the invention is providing an efficient separator for fluids.
  • the invention to achieve the abovementioned purpose, is a cyclone comprising a chamber comprising a top wall and a bottom wall; an inlet for a fluid mixture entry to the chamber; a first outlet for at least one separated portion of the fluid; and a second outlet on the bottom wall for the rest of the fluid; and wherein the bottom wall has a conical shape extending towards the top wall of the chamber.
  • a conical bottom a strong vortex is created and separation of the fluid into its substances is realized.
  • a liquid food comprising gas in it, is separated into the liquid food, such as milk, and the gas, such as water vapor.
  • the conical bottom provides a completely or an almost dry surface for the root/center of the vortex.
  • having a first outlet at the top wall provides elimination of any outlet channel located in the chamber as in the prior art; and provides more space in the chamber to clear area between the conical bottom wall and the first outlet. All advantages and results stated are achieved by without compromising separating efficiency, even by having better separating efficiency.
  • the chamber may have a cylindrical section as the main section forming side wall of the chamber.
  • the top wall may be in a conical shape as extending away from the main section.
  • the conical bottom wall may have a cone extending from edge of the bottom wall towards inside of the main section of the chamber.
  • the gas may be water vapor that may be formed due to usage of steam to heat the fluid before arriving the inlet of the cyclone.
  • the cyclone may comprise a condenser provided out of the chamber.
  • a condenser provided out of the chamber.
  • the cyclone provides more space in the chamber to clear area between the conical bottom and the top outlet.
  • the inlet may be in form of a pipe and has a widening cross section along the flow direction of the fluid.
  • the fluid may be milk and due to being calcium enriched, the inlet can be harmed.
  • the velocity of the fluid is slowed down due to widening cross section, it is still better to have velocity enough to create cyclone.
  • the velocity may be 8-40 m/s.
  • the widening may be provided by at least one inlet wall having an inclination compared to longitudinal extension direction of the inlet, that is below 20 degrees of angle, particularly 15 degrees of angle or less.
  • each of the two facing walls of the inlet may have an inclination compared to longitudinal extension direction of the inlet, that is below 20 degrees of angle, particularly 15 degrees of angle or less; particularly the two facing walls may have the same angle, thus symmetrically widening the cross section of the inlet.
  • a shorter inlet is provided, that leads decreased velocity, less erosion and less carry over of the product droplets (avoiding product loss) by the gas vertically moving and being exhaust through the top outlet.
  • the inlet may provide a tangential entry for the fluid to the chamber.
  • speed of the fluid is maintained, and cyclone effect is supported and enhanced.
  • the inlet may have a linear section and a bending section wherein the widening cross section is provided on the liner section and the bending section is provided between the chamber and the linear section as also providing tangential entry stated before.
  • the fluid may be a liquid food comprising gas, particularly water vapor, wherein the top outlet is for the gas and the bottom outlet is for the liquid food as not comprising gas.
  • the liquid food may be milk, juice or any other liquid food known.
  • the first outlet may be disposed on the top wall.
  • no product particles for example food such as milk carried over to outlet; and efficiency increased compared to the prior arts having the first outlet inside the chamber.
  • the outlet may be located at the tip of the cone.
  • a further cylindrical outlet chamber may be formed on the tip area of the cone shaped top wall. This outlet chamber may have the first outlet on top of it.
  • the second outlet may be disposed on an area on or close to the periphery of the bottom wall.
  • whole surface of conical bottom wall may be used to guide the portion of the fluid, particularly liquid portion to the second outlet.
  • the other aspect of the invention is a food processing system comprising a direct heating device, a holding cell, and the cyclone according to any one of the alternatives mentioned before.
  • the food processing may mean ultra-high temperature (UHT) treatment, for example to produce UHT dairy product, UHT beverage, or extended shelf life (ESL) milk or any other food product known in the art as having longer shelf life compared to fresh food.
  • the direct heating may mean steam injection or steam infusion processes known in the art.
  • the cyclone of the first aspect of the invention may be used as flash vessel or separator or a deaerator in the food processing system.
  • the velocity in the product inlet may be in between 8-40 m/s, the vertical velocity inside the chamber may be in between 0.5-2.7 m/s; on the other hand, velocity in an exhaust pipe to condenser may be 8-46 m/s.
  • a cyclone (1) having a chamber (10) resting on four legs (14) is presented.
  • the chamber (10) comprises a main section (11) in cylindrical shape and a top wall (12) disposed on the main section (11) and having a conical shape.
  • the cyclone (1) has an inlet (15) guiding a fluid inside the chamber (10).
  • the chamber (10) has also a bottom wall (13) comprising a second outlet (21).
  • the fluid fed to the cyclone (1) may be a liquid food (L) that may be heated already by a direct heating device (2) that uses steam (S), like a steam injector and/or a steam infusion device and then passing through a holding cell (3) known in the art as in Fig. 5 .
  • the liquid food may have additional water therein due to condensed steam used to heat the liquid food.
  • S steam
  • the direct heated liquid food is wished to be separated from the excess water caused by the steam (S)
  • the liquid food is fed to cyclone after heating process.
  • the inlet (15) for the liquid food comprises two sections, a linear section (16) and a bending section (19).
  • the linear section (16) has a widening cross section, meaning along the direction of fluid flow, the cross-sectional area of the inlet (15) increases.
  • at least one of the inlet walls (17) extends with an angle (18) along the food flow direction compared to the longitudinal direction of the inlet (15). That angle (18) is equal or less than 20-degree, preferably 15-degree.
  • the bending section (19) of the inlet (15) starts.
  • Fig. 1 a first alternative of the cyclone (1) is presented that has only one inlet wall (17) having the angled extension.
  • the inlet (15) has its two inlet walls (17) facing each other as having the angled extension; and having a symmetrical widening cross section.
  • the bending section (19) allows the liquid food to enter the cylindrical chamber (10) tangentially as seen on Fig. 3 . That supports cyclone effect and prevents the flow from slowing down; and eventually creating a vortex in the cyclone (1).
  • the cyclone (1) has a bottom wall (13) in a conical shape.
  • the tip of cone shaping the bottom wall (13) remains in the chamber (10), meaning that the cone is oriented as extending upward direction towards the top wall (12).
  • the conical bottom wall (13) provides a base for vortex to center its root.
  • the bottom wall (13) keeps the base of the vortex almost dry, so none or so limited amount of liquid or particles in the liquid food drawn up in the cyclone (1). That avoids product losses through the first outlet (20).
  • the portion forwarded to the first outlet (20) is mainly the water vapor.
  • the liquid food product follows the conical bottom wall (13) to the bottom edge of the cone.
  • a second outlet (21) is formed to collect the separated liquid food to transfer a further point, like a processing point, for example to a homogenizer and/or a package filling machine.
  • the conical bottom wall (13) facilitates an improved and efficient separation.
  • the top wall (12) of the cyclone (1) is also a conical wall as extending away from the bottom wall (13) and the chamber (10), meaning that the cone is oriented as extending upward direction as the conical bottom wall (13).
  • the first outlet (20) for the vapor is located on the top wall (12).
  • the cyclone does not have any condenser in the chamber (10) to condense the water vapor.
  • the condenser (not shown) is provided out of the cyclone (1), so the space between the top wall (12) and the bottom wall (13) in the chamber (10) is kept clean and empty.
  • the cyclone (1) explained above is used on a food processing system (100) as in Fig. 5 .
  • the system (100) also comprises a direct heating device (2) that is a steam injector or a steam infusion unit using steam (S) as heating medium and a holding cell (3) before the cyclone (1).
  • a liquid food (L) heated by the direct heating device (2) for example to UHT temperature values, and kept for some time at that temperature by travelling in the holding cell (3). Then, the excess water in the liquid food is separated by the cyclone (1).

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Dairy Products (AREA)
EP22169514.1A 2022-04-22 2022-04-22 Cyclone et un système de traitement des aliments comportant le cyclone Withdrawn EP4265338A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22169514.1A EP4265338A1 (fr) 2022-04-22 2022-04-22 Cyclone et un système de traitement des aliments comportant le cyclone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22169514.1A EP4265338A1 (fr) 2022-04-22 2022-04-22 Cyclone et un système de traitement des aliments comportant le cyclone

Publications (1)

Publication Number Publication Date
EP4265338A1 true EP4265338A1 (fr) 2023-10-25

Family

ID=81654502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22169514.1A Withdrawn EP4265338A1 (fr) 2022-04-22 2022-04-22 Cyclone et un système de traitement des aliments comportant le cyclone

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EP (1) EP4265338A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076507A (en) * 1975-06-18 1978-02-28 Aktieselskabet Niro Atomizer Centrifugal separator for separating liquid and gas
SE424508B (sv) * 1979-11-15 1982-07-26 Celleco Ab Hydrocyklonseparator med lettrejektanordning
WO2014058141A1 (fr) * 2012-10-09 2014-04-17 Lee Sangin Dispositif de collecte de poussières
KR101524469B1 (ko) * 2013-02-27 2015-06-02 현대제철 주식회사 Cog가스내 수소 분리장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4076507A (en) * 1975-06-18 1978-02-28 Aktieselskabet Niro Atomizer Centrifugal separator for separating liquid and gas
SE424508B (sv) * 1979-11-15 1982-07-26 Celleco Ab Hydrocyklonseparator med lettrejektanordning
WO2014058141A1 (fr) * 2012-10-09 2014-04-17 Lee Sangin Dispositif de collecte de poussières
KR101524469B1 (ko) * 2013-02-27 2015-06-02 현대제철 주식회사 Cog가스내 수소 분리장치

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