WO2009024154A1 - Procédé et unité pour traiter un fluide - Google Patents

Procédé et unité pour traiter un fluide Download PDF

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Publication number
WO2009024154A1
WO2009024154A1 PCT/DK2008/050205 DK2008050205W WO2009024154A1 WO 2009024154 A1 WO2009024154 A1 WO 2009024154A1 DK 2008050205 W DK2008050205 W DK 2008050205W WO 2009024154 A1 WO2009024154 A1 WO 2009024154A1
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WO
WIPO (PCT)
Prior art keywords
fluid
processing unit
unit according
fluid processing
processed
Prior art date
Application number
PCT/DK2008/050205
Other languages
English (en)
Inventor
Finn Beldring
Christian Rasmussen
Mark Peter Brown
Original Assignee
Grundfos Management A/S
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 Grundfos Management A/S filed Critical Grundfos Management A/S
Publication of WO2009024154A1 publication Critical patent/WO2009024154A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C02F9/20—Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters

Definitions

  • the present invention relates to a method and a unit for providing fluid to be used e.g. during cleaning of at least articles or a production facility, typically being a container used for producing food or beverages.
  • the invention is preferably applicable in connection with a so-called cleaning in place (CIP) process.
  • the invention also relates to one or more cassettes embodying one or more features of the unit.
  • CIP Cleaning In Place
  • a unit which provides such fluids is often termed a CIP unit.
  • a CIP process typically comprises the following operations:
  • Pre-rinsinq During this operation the article or production facility to be cleaned is typically flushed with water, which water may be untreated tap-water. However, the water is typically heated to prepare the article for the next operations, and in order to use less water, the water may be water re-used from an earlier after- rinsing operation. Furthermore, dirt, deposits etc. may in many cases be flushed away from the article or production facility by the pre-rinsing step.
  • Rinsing During the rinsing operation, the article or production facility is typically exposed to a chemical treatment such as either alkaline treatment, acid treatment or both. The alkaline treatment typically acts on organic material, and the acid treatment typically acts on minerals.
  • the article or production facility is flushed with a fluid to make the article or production facility ready for use.
  • the flushing removes residues left over on the article or production facility after the rinsing operation.
  • various fluids can be used, such as water which may be untreated tap-water.
  • the water used during after-rinsing is typically collected in a container and used in a later pre- rinsing operation.
  • a typical CIP unit comprises a number of devices, such as heat exchanger devices, dosing devices, pressurisation devices, mixing devices, buffer containers etc. connected to each other.
  • the connections between the devices are constituted by a number of pipes leading fluid from one device of the CIP unit to another.
  • a CIP unit typically comprises sensors for sensing e.g. temperature, pressure, pH and conductivity.
  • US 6,161,558 discloses a portable clean-in-place apparatus for a batch processing system.
  • the system is disclosed as being build from a number of devices such as heat exchangers and pumps connected by pipes WO 92/14559 discloses a portable whirlpool cleaner and method for use.
  • the cleaner is disclosed as being build from a number of devices such as heating means, pump filter means being connected by pipes.
  • the various devices with their connections are arranged within a cabinet visually screen the various devices.
  • a problem with the known CIP units used for performing a CIP process is that the units are built from a number of devices each designed to operate as a stand alone device, whereby the devices are not necessarily mutually compatible per se resulting in the overall efficiency, physical dimensions and controllability of the device not being very satisfactory.
  • the present invention is applicable in other processes not necessarily including a cleaning process but where an article or production facility is to be treated with or exposed to fluid with varying chemical and thermo dynamical properties.
  • the present invention relates in a first aspect to a fluid processing unit receiving fluid to be processed and delivering the fluid as processed fluid, the device comprising a flow passage, the flow passage being connected to an inlet and an outlet of the fluid processing unit through which the fluid to be processed flows into and out of the fluid processing unit, at least one fluid interaction component or being adapted to receive at least one fluid interaction component, one or more heat transferring elements for exchanging heat with the fluid flowing through the device, one or more total pressure increasing means for increasing the total pressure of fluid to be processed at least locally in the fluid processing unit, and a casing encapsulating the one or more heat transferring elements and the one or more total pressure increasing means.
  • At least one of the at least one fluid interaction components comprise(s) dosing means for dosing a substance into the fluid flowing through the processing unit, and the casing may preferably furthermore encapsulate the at least one fluid interaction component.
  • the casing preferably forms at least part of the wall of the fluid processing unit which confines fluid in the processing unit so that fluid may flow out of / into the processing unit through one or more inlets and outlets provided in the casing.
  • the casing according to present invention is a structural component that assists in defining a flow paths, confines fluid and provides structural strength to the processing unit thereby reducing, and in many cases rendering unnecessary, fittings, pipes etc normally used to lead fluid between various stand-alone units.
  • the various functions of fluid processing units according to the present invention are integrated into a single unit.
  • a number of terms are used. Although these terms are used in a manner ordinary to a person skilled in the art, a brief explanation will be presented below on some of these terms.
  • Fluid processing unit is preferably used to designate a unit being able to receive fluid from a fluid source, in which unit the fluid interacts with a fluid interaction action component, such as receives additives, and in which the thermo dynamical properties, such as pressure and/or temperature, of the fluid are changed.
  • a fluid interaction action component such as receives additives
  • thermo dynamical properties such as pressure and/or temperature
  • Fluid interaction component is preferably used to designate a member which is adapted to interact with the fluid flowing through the processing unit.
  • the interaction results in a change mainly of the fluid
  • the fluid interaction component is an UV-lamp.
  • a further example of the first type is addition of one ore more substances to a fluid; i.e. the fluid interaction component is a dosing device, e.g. a nozzle.
  • An example of the second type of interaction is measuring of the pH-value of the fluid; i.e. that the fluid interaction component is a pH-meter.
  • a further example of a fluid interaction element is a mixing chamber in which mixing between a fluid and e.g. a chemical substance or one between two or more fluids takes place.
  • Fluid is used to designate at least a liquid, a gas, a fluidized medium or combinations thereof.
  • Fluid to be processed is preferably used to designate fluid flowing into the fluid processing unit, being processed in the unit so as to leave the unit.
  • Processed fluid is preferably used to designate fluid having left the fluid processing unit, i.e. after leaving the outlet. It should be mentioned that processed fluid may include fluid that has only been pumped through the unit with no addition of additives and/or heat exchange. Fresh fluid is preferably used to designate fluid which has not been used for cleaning purposes or the like - fresh fluid is in many embodiments tap water.
  • Casing is preferably used to designate the wall of the fluid processing unit which wall confines fluid in the processing unit so that fluid may flow out of and into the processing unit through one or more inlets and outlets provided in the casing.
  • the casing thereby preferably forms a sealed encapsulation of the processing unit.
  • the casing comprises preferably a number of wall elements. Accordingly, at least a part of the casing is preferably in contact with the fluid flowing through the fluid processing unit.
  • Cassette is preferably used to designate an element which either contains a fluid interaction component and/or a heat transferring element, is adapted to receive a fluid interaction component and/or a heat transferring element or both.
  • a cassette typically comprises an outer housing arranged so as to form at least part of the casing, one or more inlet(s) and one or more outlet(s).
  • the outer housing may preferably be pressure carrying in the sense that no further casing is needed to withstand the pressure difference between the interior and exterior of the cassette.
  • the outer housing typically and preferably contributes in defining the flow passage through the unit.
  • a cassette is shaped so that it comprises a flow passage through the cassette from its inlet(s) to its outlet(s).
  • the inlet(s) and outlet(s) of cassettes are preferable provided so that when two cassettes are combined, the outlet(s) of one cassette is directly connected to the inlet(s) of the other cassette and vice versa.
  • "Directly connected” is preferably used to designate a situation where the velocity and pressure of the fluid flowing out of an outlet is the same as the velocity and pressure of the fluid flowing into an inlet, which e.g. may be provided by connecting the outlet and inlet with each other with no intermediate piping in between.
  • the outer casings of the cassettes are preferably combined to form at least part of the pressuring carrying casing of the processing unit.
  • a cassette often comprises total pressure increasing means overcoming the pressure loss due to fluid flowing though the cassette
  • the assembled unit may often be pressure neutral to the process in which it is to operates.
  • a cassette is preferably designed so that flow of at least one fluid through the cassette is pressure neutral or the pressure of the fluid in question flowing through the cassette is even increased.
  • Total pressure increasing means is preferably use to designate an element increasing the total pressure (stagnation pressure) of a fluid.
  • a total pressure increasing means preferably is or comprises a fluid velocity inducer. Fluid velocity inducers is preferably used to designate and element inducing velocity to a fluid so that its direction and/or total pressure is changed.
  • a fluid velocity inducer is preferably an impeller.
  • Inlet/outlet is preferably used to designate a cross section or a region where fluid flow into or out of an element or unit.
  • the inlet/out may preferably be an end cross section or a region of a pipe, channel or the like.
  • Inlet and outlet may preferably also be considered as the sections of a control volume through which fluid flow into the element/out of the element which control volume encircling the element or unit in question.
  • washing machine for clothes, solid articles or the like.
  • Such a washing machine may be embodied as e.g. a container to which fluid with varying chemical and/or thermo dynamical properties are transported into from a CIP unit.
  • one, some or all of the total pressure to increasing means may be adapted to increase the pressure of the fluid to be processed to an extent at least partially overcoming the pressure loss due to fluid to be processed flowing through the unit.
  • one, some or all of the one or more total pressure increasing means may be adapted to increase the pressure of the fluid to be processed at least overcoming the pressure loss due to the fluid to be processed flowing through the unit.
  • one, some or all of the total pressure increasing means may comprise or may be constituted by one or more fluid velocity inducers.
  • one, some or all of the fluid velocity inducers may be adapted to receive fluid at one velocity and deliver the fluid at a higher velocity.
  • one, some or all of the fluid velocity inducers and/or total pressure increasing means may be impellers.
  • the impeller(s) may be impeller(s) with a motor-driven rotational motion.
  • the impeller(s) may be mounted on a motor-driven shaft in such a way that the axis of rotation of the shaft and the impellers are coincident.
  • one, some or all of the fluid interaction components may comprise an electromagnetic radiation source, such as an UV light source.
  • an electromagnetic radiation source such as an UV light source.
  • the wave length of the UV light emitted may preferably be in the range of lOOnm to 280 nm.
  • a mercury light source is used emitting UV light with a wave length of 254nm.
  • Other particular preferred wave lengths are 185 and 265 nm.
  • some or all of fluid interaction components may preferably comprise one or more nozzles.
  • some or all of the fluid interaction components may comprise one or more process active surfaces, such as one or more filter surfaces for filtering fluid, one or more catalytic surfaces for providing a catalytic process, one or more heat exchanger surfaces, one or more absorber surfaces, one or more condenser surfaces, one or more stripper surface, one or drying surfaces, one or more surfaces for carrying biological growth, one ore more surfaces for crystallization, one or more surfaces for ion exchanging, one or more membrane surfaces or combination thereof.
  • One, some or all of the fluid interaction components may preferably comprise surfaces for establishing an electromagnetic field so as to perform an electrolytic process, electro-dialytic process, electro de-ionization process or combinations thereof.
  • one, some or all of the fluid interaction components may preferably comprise means for exposing fluid to radiation such as magnetic radiation, ultraviolet radiation, radioactive radiation, ultra sound, microwaves, laser radiation or combinations thereof.
  • one, some or all of the fluid interaction component may preferably a separator, a centrifuge, means for milling, means for homogenization, a decanter, a transporter for transporting e.g. particles, ion exchanging substances, a mixer or combinations thereof.
  • Futhermore one, some or all of the fluid interaction components may preferably alternatively or in combination with the above comprise means for degassing, distillation, aeration, such as atmospheric air, oxygen, ozone, chlorine, means for evaporation, means for reducing the pressure e.g. for vacuum distillation, means for steam treatment or combinations thereof.
  • Processing units according to the present invention may in preferred embodiments comprise one or more elements adapted to provide the fluid a given retention time in a cavity.
  • Preferred embodiments of the fluid processing unit may comprise a reactor for performing a biological process, a chemical process, a fuel cell process or a combination thereof.
  • the one or more of the heat transferring elements may preferably comprise a heat source such as an electrical heater and or a cooling source, such as a peltier element.
  • the heat transferring element(s) may comprise a cooling/heating fluid contact surface of one or more of the heat transferring element, the cooling/heating contact surface being an inner surface of at least one channel provided in the heat transferring element, which channel has a channel inlet through which a cooling/heat fluid flows into the channel and a channel outlet through which the cooling/heating fluid flows out of the channel.
  • a fluid processing unit preferably comprises a stack of at least two heat transferring elements which are connectable so that the cooling/heating fluid flows from the channel outlet of one heat transferring element to the channel inlet of the consecutive heat transferring element.
  • the outlet of one channel may preferably be connected or connectable to the inlet of the consecutive channel via connection stubs, and the cooling/heating fluid preferably flows from an inlet pipe to a first heat transferring element via connection stub(s) and from a last heat transferring element to an outlet pipe via connection stub(s).
  • the cooling/heating fluid may preferably be pumped through the heat transferring stage by a pump arranged outside or inside the casing of the fluid processing unit.
  • the heat transferring element(s) may be substantially disc-shaped (not necessarily having a circular outer rim) and comprise a hole, preferably being centrally arranged, wherein the at least one total pressure increasing means is placed in such a way that it transports the fluid to be processed flow from one side of the heat transferring element to the other.
  • the heat transferring element may preferably comprise a guide plate forming a channel leading the fluid to be processed towards the total pressure increasing means.
  • At least a part of the casing forms a part of the flow passage for the fluid to be processed.
  • the unit may comprise one or more cassettes.
  • An outer housing of one or more of the cassettes forms at least a part of an outer surface of the casing.
  • an outer housing of one or more of the cassettes forming at least a part of the casing may abut an interior surface of the casing.
  • one or more of the cassettes may comprise total pressure increasing means.
  • One or more of the cassettes may preferably be adapted to receive or may comprise a fluid velocity inducer, preferably being an impeller, the fluid velocity inducer constituting at least a part of one or both flow passages.
  • the fluid processing unit may comprise or may be connected to a valve arrangement through which the inlet of the flow passage is selectively connectable to a buffer tank, such as a fresh fluid source. Additionally, the inlet may further be selectively connectable to a production facility. Furthermore, the fluid processing unit may preferably comprise or may preferably be connected to a valve arrangement through which the outlet of the flow passage is selectively connectable to a production facility.
  • the fluid processing unit may be divided into a number of stages including: - a total pressure increasing stage, a dosing stage in which one or more additives may be added to the fluid to be processed, a heat exchanger stage in which the fluid to be processed may be cooled or heated, and a measuring stage.
  • the total pressure increasing stage may be arranged upstream of the dosing stage which may be arranged upstream of the heat exchanger stage being arranged upstream of the measuring stage.
  • the total pressure increasing means may in preferred embodiments be adapted to increase the total pressure of the fluid(s) flowing through the unit, so that the fluid(s) leaving the unit has(have) a higher total pressure than when the fluid(s) flows into the unit.
  • a second aspect of the present invention relates to a cassette preferably comprising one or more of the features disclosed above in relation to the first aspect of the invention.
  • a third aspect of the present invention relates to a method for processing a fluid, the method comprising feeding fluid to be processed to a fluid processing unit according to the first aspect of the invention.
  • FIG. 1 shows schematically a production facility connected to a CIP unit according to the present invention
  • Fig. 2 shows a three dimensional view of a CIP unit according to a particular preferred embodiment of the present invention
  • Fig. 2a shows the unit assembled whereas fig. 2b shows the unit in an exploded view
  • Fig. 3 shows a cross sectional view of the CIP unit shown in fig. 2
  • Fig. 3a shows the unit assembled whereas fig. 3b shows the unit in an exploded view
  • Fig. 4 shows a configurable stage configured as a dosing stage; fig. 4a and 4c show the configurable stage in three-dimensional views, fig. 4b shows a partial cross sectional view along line A-A of the configurable stage and fig. 4d shows a three-dimensional view of the dosing means, Fig. 5 shows a heat transferring element of a heat exchanger stage according to the present invention seen obliquely from above and below, respectively.
  • Fig. 6 is a schematic illustration of a stack of heat transferring elements of a heat exchanger stage according to a preferred embodiment of the present invention. For clarity the elements are shown spaced apart, whereas in practise they abut each other mutually. Furthermore a part of the side wall has been removed to render the heat exchanging elements visible.
  • Fig. 7 shows the heat transferring elements of fig. 6 seen obliquely from below and with the side wall removed for clarity.
  • Fig. 8 illustrates the flow path of the cooling/heating fluid flowing in the channels of the heat transferring elements.
  • Fig. 9 illustrates the flow path of the fluid to be processed flowing between the heat transferring elements.
  • Fig. 10 shows in an exploded view an embodiment of a heat transfer stage wherein both the fluid to be processed and the cooling/heating fluid are pumped by impellers arranged in the heat transfer stage 18,
  • Fig. 11 shows in an exploded view a further embodiment of a heat transfer stage wherein both the fluid to be processed and the cooling/heating fluid are pumped by impellers arranged in the heat transfer stage 18.
  • Fig. 1 shows schematically a production facility 2 connected to a fluid processing unit in the form of a CIP unit 1 according to the present invention.
  • the production facility 2 may e.g. be a tank used for production of cheese but may in general be any type of facility which should be cleaned, typically at regular intervals. As indicated above, the production facility 2 may be replaced by a container for receiving articles to be processed such as cleaned.
  • the CIP unit 1 is connected to the production facility by a pipe 4 or similar fluid connection.
  • the pipe 4 leads processed fluid from the CIP unit 1 to e.g. a spraying device 5 typically in the form of a nozzle being moveably arranged within the production facility 2 so that the spraying device 5 is able to spray completely the interior of the production facility 2 to remove residuals from the production of e.g. cheese.
  • the CIP unit 1 is connected to a buffer tank 3 in a bi-directional manner so that the CIP unit 1 may receive fluid from the buffer tank 3 or delivering fluid to the buffer tank 3.
  • the connections used for receiving and deliver fluid may be made outside the CIP unit 1; e.g. the connections may be made to the pipe 6.
  • the connection to the buffer tank 3 may typically be made as one pipe only although fig. 1 indicates that two pipes 7 are used for the connection.
  • the CIP unit 1 furthermore comprises a fresh fluid connection 8 for receiving fresh fluid.
  • fresh fluid is preferably meant fluid that has not been used for cleaning purposes and/or a fluid to which one or more additives are to be added.
  • the fresh fluid is tap water which may have been cleaned or processed in some way to have a specific characteristic before flowing into the CIP unit 1.
  • fluid flowing into the CIP unit 1 (and later leaving the unit as processed fluid) is termed fluid to be processed.
  • Additives to be added to the fluid, typically fresh fluid, fluid from the buffer tank 3 or a combination thereof, in the CIP unit 1 is led into the CIP unit 1 through an additive connection 9.
  • the CIP unit 1 comprises a heat exchanger stage 18 in order to be able to control the temperature of the fluid leaving the CIP unit 1 through pipe 4. Furthermore, the CIP unit 1 comprises a total pressure increasing stage 11 comprising a numbers of impellers for increasing the total pressure of the fluid for at least assisting pumping fluid through the CIP unit 1. Stage is in the present context preferably used to designate a flow region in which a particular processing of the fluid takes place. In many applications it is a requirement that the production facility 2 has been sufficiently cleaned to meet a given requirement. One way to examine whether the cleaning has been successful in this way is to measure the conductivity of the fluid leaving the production facility 2 through the pipe 6 and in such cases a conductivity sensor 12 is arranged typically inside the CIP unit 1.
  • the cleaning may in many situations depend on the chemical and thermo dynamical properties of the fluid used for cleaning, and the CIP unit 1 may preferably comprise sensors for measuring such properties.
  • the CIP unit 1 preferably comprises a temperature sensor 13 and a pH sensor 14 arranged preferably inside the CIP unit 1 to measure the temperature and the pH value of the fluid flow towards the production facility 2.
  • the sensors are indicated as measuring the fluid outside the CIP unit 1 in order to show that the fluid to be measured is the fluid leaving the CIP unit 1 to flow through pipe 4.
  • Fig. 2A shows in a three dimensional view a CIP unit 1 according to a preferred embodiment of the present invention.
  • the various stages of the unit are indicated in the exploded view of fig. 2B in which the CIP unit 1 is exploded according to the various stages.
  • the CIP unit 1 comprises an inlet 15 for receiving fluid to be processed, e.g. fresh fluid or fluid from a buffer tank 3.
  • the inlet 15 is connected to a change-over valve (not shown) so as to connect the inlet 15 to the buffer tank 3 or a source of fresh fluid, or fluid to be processed in general.
  • the fluid flowing out of the production facility 2 may also be recirculated to the CIP unit as indicated in fig. 1 by arranging a suitable connection with valve mechanism, such as piping and change-over valve, in relation to the inlet 15.
  • a number of stages are provided for various treatment of the fluid to be processed.
  • a total pressure increasing stage 11 such as a pumping stage, is arranged, and the fluid flowing out of the pumping stage 11 flows into a dosing stage 17 in which one or more additives can be added to the fluid.
  • a heat exchanger stage 18 comprising total pressure increasing means in the form of impellers 28 is arranged downstream of the dosing stage 17. Downstream of the heat exchanger stage 18, a measuring stage 19 is arranged.
  • the processed fluid leaves the CIP unit 1 at the outlet 20.
  • the total pressure increasing stage 11 and the impellers 28 (see e.g. fig. 3A) arranged in the heat exchanger stage 18 are arranged on a common shaft which is rotated by a motor 21.
  • a valve arrangement may be arranged in relation to the outlet 20 to connect the outlet with the buffer 3 or production facility 2.
  • the measuring stage may be configured as a dosing stage or vice versa; furthermore, the dosing stage may be configured to comprise a sensor and the measuring stage may be configured to comprise a nozzle and/or other dosing means.
  • the one or more additives to be added to the fluid are, as mentioned above, mixed into the fluid in the dosing stage 17.
  • This dosing stage comprises openings 22 and 23 into the CIP unit (will be disclosed further in connection with e.g. fig. 4) with flanges, in which one or more nozzles may be arranged, which nozzle(s) dose(s) the additives into the dosing stage 17.
  • the subsequent heat exchanger stage 18 which comprises a number of rotating impellers for increasing the total pressure of the fluid.
  • the impellers are designed to increase the total the pressure it has been found that the flow through the channels of heat exchanger with impellers provides a mixing.
  • specific mixing characteristics are aimed at a mixing stage may be inserted in the processing unit e.g. between the dosing stage 17 and the heat exchanger stage 18.
  • Such a mixing stage may comprise one or more active mixer, such as rotating blades and/or one or more passive mixers such as flow guides to guide the flow in a specific pattern to obtain the mixing.
  • the heat exchanger stage 18 heats or cools the fluid to be processed by exchanging heat with a heating or cooling fluid.
  • This heating or cooling fluid flows into the CIP unit 1 through heat exchanger inlet 24 and flows out of the CIP unit 1 through heat exchanger outlet 25.
  • the temperature of the heating or cooling fluid is set outside of the CIP unit 1.
  • the measuring stage 19 also comprises openings 26 and 27 into the CIP unit with flanges in which one or more sensors may be arranged arranged.
  • the unit shown in fig. 2 may be held together by stay bolts (not shown) extending in the length-wise direction of the unit and protruding through a penetration 80a at the upper end of the unit and through a penetration 80b at the lower end of the unit. Nuts are provided at the ends of the stay bolts so that when the nuts are tightened, a clamping force is applied to the unit to keep the unit assembled.
  • casing parts of the unit fits into each other (cf. e.g. detail 81 in fig. 3) or assembly rings 82 (cf. fig. 3) are applied to prevent the various parts of the unit to dislocate relatively to each other in a radial direction of the unit (the embodiment shown in fig. 2 and 3 is considered to be elongated and cylindrical).
  • Fig. 3 shows a longitudinal cross sectional view of the CIP unit shown in fig. 2; Fig. 3B shows an exploded view corresponding to the view of fig. 2B.
  • the flow path of the fluid through the unit 1 is indicated by arrows labelled "F".
  • the total pressure increasing stage 11 comprises a number of stacked rotatable impellers 28 receiving fluid from the inlet 15 and pumps the fluid into the dosing stage 17.
  • a total pressure increasing means which in this embodiment is a stack of rotatable impellers 28 arranged in the heat exchanger stage 18. All the fluid velocity inducers are connected to the shaft 30 which is rotated by the motor 21.
  • Fig. 4 shows a configurable stage 40 configured as the dosing stage 17 by placing a fluid interaction component in the form of a dosing element 50 formed as an elongated element extending though the openings 22, 23 (see fig. 2a).
  • the measuring stage may be provided by arranging one or more fluid interaction components in the form of sensors in one or both of the openings 22, 23.
  • the interaction components are considered to be encapsulated by the casing although a part of e.g. the elongated element extends outside the casing as the interaction takes place in a region inside the casing in a region around the cut-out 52.
  • the configurable stage 40 comprises an outer cylindrical wall 42 and a dividing wall element 43 having a penetration provided at the centre for receiving an impeller 28 (shown in fig. 4b and c - please note that fig. 4c is shown up-side down in relation to fig. 4b) inside an impeller shield 28a (not shown in fig. 4c).
  • the impeller receives fluid at its inlet 44 (see fig. 4b) and delivers the fluid to be processed to a first cavity 45 below (with reference to fig. 4b) the dividing wall element 43.
  • a second cavity 46 is located above the dividing wall element 43.
  • the first and second cavities 45, 46 are in fluid communication with each by a connecting passage 48.
  • One side 49 of the connecting passage 48 is formed in an element 51 being removed in fig. 4c together with the impeller shield 28a for render the details of the stage 40 more visible.
  • the flow path is indicated by arrows labelled F in fig. 4.
  • the dosing element 50 comprises an elongated element with two bores 51 5 extending into a cut-out 52 provided in the dosing element.
  • the dosing element 50 is secured and sealed to the configurable stage by the nuts 53 and O-rings (not shown) arranged in the openings 22, 23.
  • the two bores are connected to one or more sources of additives via a dosing pump (not shown) which pumps additives to the bores 51.
  • the additives flow through the bores 51 to the cut-out 10 52 and into the fluid flow through the connecting passage 48.
  • a stage may in general comprise a channel 15 through which fluid flows, and the dosing means may dose one or more additive(s) and/or the measuring means may make a measurement on the fluid - or in general an interaction between the fluid interaction component and the fluid takes place.
  • a heat exchanger stage 18 comprises at least one and preferably a larger number of heat transferring elements 61 which may have a design as illustrated in fig. 5.
  • Fig. 5. a and fig. 5.b show the heat transferring element 61 seen obliquely from above and below, respectively, where “above” and “below” refers to the orientation of the heat exchanging stage in fig. 3.
  • the heat transferring elements 61 have channels 25 62 for guiding a cooling/heating fluid, with which the fluid to be processed exchange heat, along a cooling/heating fluid contact surface which is the internal surface of the channel 62 and therefore not directly visible in the figure.
  • Each channel 62 comprises a channel inlet 63 through which the cooling/heating fluid enters the channel 62 and a channel outlet 64 through which the cooling/heating 30 fluid exits the channel 62.
  • the channel outlet 64 and channel inlet 63 comprise fluid guides in form of connection stubs 65 (see fig. 6 and 7) which are connectable so that the heat transferring elements 61 are stackable, and the cooling/heating fluid can flow from a channel 62 of one heat transferring element 61 to a channel 62 of a consecutively arranged heat transferring element 61. This will be described in more detail in the following.
  • the heat transferring elements 61 preferably abut and thereby support each other at support bosses 66, but it is also possible within the scope of the invention that they only abut at the channel inlets and outlets (63, 64).
  • the heat transferring element 61 comprises a central hole 67 for placing an impeller 28 (see fig. 6 and 7), the function of which is described below.
  • Fig. 6 shows a stack of three heat transferring elements 61 together with the inlet and outlet pipes (24, 25) for the cooling/heating fluid.
  • the heat transferring elements 61 are shown spaced apart, whereas in practise they abut each other mutually as shown in fig. 3.
  • the rims 71 of the heat transferring elements 61 abut a circumferential side wall 72. In the figures, a part of the side wall 72 has been removed to render visible the heat transferring elements 61.
  • Impellers 28 are arranged along a rotatable common shaft (not shown) so that when the shaft is rotated, typically by a motor (not shown), the impellers 28 transport the fluid to be processed from the bottom (relatively to the orientation of the figure) to the top of the heat exchanger stage 18.
  • the fluid to be processed leaves an impeller 28, the fluid to be processed contacts the contact surface of the heat transferring element 61, this surface being the outer and thereby directly visible surface; i.e. visible in the figure.
  • Fig. 7 shows the heat transferring elements 61 of fig. 6 seen obliquely from below and with the side wall 72 removed for clarity.
  • a guide plate 74 has been mounted to the channel 62 of each heat exchanger element 61 to guide the fluid to be processed towards the impellers 28.
  • this guide plate 74 is made integral with the remaining heat transferring element 61.
  • the flow path of the cooling/heating fluid through the heat exchanger stage 18 of figs. 6 and 7 is illustrated by a broken line in fig. 8. It enters the heat exchanger stage 18 through the inlet pipe 24 from where it flows to the channel 62 of the upper heat transferring element 61 via one or more connection stubs 65.
  • the cooling/heating fluid flows through the consecutive heat transferring elements 61 as illustrated, and from the last heat transferring element 61, it flows through the outlet pipe 25.
  • the flow of the cooling/heating fluid typically caused by a pump (not shown) placed external to the heat exchanger stage 18, but the pump may also be integrated in the heat exchanger stage 18.
  • the cooling/heating fluid exchanges heat/energy with a fluid to be processed flowing between the heat exchanging elements 61, i.e. along their fluid to be processed contact surfaces.
  • the flow path of the fluid to be processed is illustrated schematically in fig. 9.
  • the fluid to be processed enters the central region of the first impeller 28 from the dosing stage 17 (see e.g. fig 3).
  • the impellers 28 of the heat transferring stage are rotatable by means of a motor driven shaft (see e.g. fig. 3).
  • the centre axis of the shaft is coincident with the centre axis of the impeller 28, and the fluid to be 10 processed preferably flows towards the impeller along the whole periphery of the shaft. This is indicated with one central arrow in the figure for illustrative purposes only.
  • the rims 71 are sealed to the casing so as to define a channel between two neighbouring heat exchanging elements 1.
  • the impeller 28 induces momentum to the fluid to be processed which makes it 15 flow towards the rim 71 of the heat exchanging element 61. From here it flows into the space partly defined by the guide plate 74. This flow is mainly obtained by a draw from the impeller 28 placed in the consecutive heat exchanging element 1, and from there the flow pattern is repeated.
  • Fig. 10 shows in an exploded view an embodiment of a heat transfer stage 18 in which both the fluid to be processed and the cooling/heating fluid is pumped by
  • the structure of the heat exchanger stage 18 is similar to what is disclosed e.g. in connection with figures 5-9, and comprises a number of heat transferring elements 61 and impellers 28 rotated by - in this case - two shafts 30. Channels
  • the heat transfer element are octagonally shaped discs with an edge 85 extending perpendicular to a horizontal extension of the discs as shown in the figure. These edges are sealed to the casing when the heat transfer stage 18 is assembled and constitute a wall part of the channels.
  • end plates 84a and 84b are arranged, although these end plates may be omitted.
  • disc does not necessarily imply a circular structure; on the contrary and as indicated in fig. 10 discs may have an octagonally shaped perimeter. Consequently, the heat transferring elements 30 may be described as plate shaped.
  • the heat transfer elements 61 may be made circular, squared or may be given other shapes.
  • the heat transfer stage 18 of fig. 10 may e.g. be arranged in the unit shown in fig. 2.
  • Fig. 11 shows an exploded view of a further embodiment of a heat transfer stage 18 according to the present invention.
  • Components being the same as in the embodiment shown in fig. 10 are provided with the same reference numbers and detailed description thereof are omitted. Similar to the embodiment shown in fig.
  • casing parts and parts 84a and 84b have been left out in the figure to render the internal structure of the heat transfer stage 18 visible.
  • the heat transfer stage comprises a number of heat transferring elements 61 formed as discs which are stacked so as to provide channels 83 between neighbouring elements 61 as shown in fig. 11.
  • the surfaces of the heat transferring elements 61 facing into a channel 83 constitute the fluid contact surface for the first and the second fluid respectively.
  • impeller pairs are arranged in some of the channels 83 as indicated in 11. Although it is preferred to arrange the impellers 28 of the impeller pairs symmetrically with their centres located along a radius as indicated on fig. 11, the impellers of the pair of impellers may be arranged differently.
  • the impellers are arranged on rotatable shafts 30. As indicated in fig.
  • each impeller in a pair of impellers Upon rotation of the shafts 30, each impeller in a pair of impellers generates a vortex which will interact with each other so that the vortexes generated by each impeller in an impeller pair superimpose each other resulting in a single vortex.
  • Such a vortex will be similar to the vortex generated by a single impeller arranged with its centre coinciding with the centre of a heat transferring element.
  • the inlets and outlet 24, 25 and other connections may be adapted to fit with the flow paths of the actual heat transfer stage applied.
  • Such adaptation may be provided by suitable fittings in terms of flow channels penetrations in the casing and the like.
  • a casing being the wall of the fluid processing unit which wall confines fluid in the processing unit so that fluid may flow into / out of the processing unit through one or more inlets and outlets provided in the casing.
  • the casing preferably comprises a number of wall elements which together form the casing.
  • the casing encapsulates the various parts of the processing unit so as to provide a unit ready for use such as disclosed in connection with e.g. figure 2 without the need for connecting stages of the unit by pipes or the like.
  • units according to the present invention may be made modular e.g. by each stage being a cassette which fits together with upstream and downstream cassettes.
  • the dosing stage 17, the heat transferring stage 18 and the measuring stage 19 may be considered as cassettes.
  • a given fluid processing unit may easily be provided to meet a certain demand as the actual number of cassette and fluid interaction performed by the cassette may be selected so as to meet the demand.
  • the assembled unit may often be pressure neutral to the process in which it is to operate.
  • one or more of the cassettes disclosed herein may be combined with - either alone or in combination - cassettes comprising yet other means for interacting with the fluid.
  • the unit preferably should be considered as a fluid processing unit in general not necessarily used for Cleaning In Place although many preferred embodiments preferably comprising a dosing stage, a heat exchanger stage and a measuring stage.

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  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

La présente invention concerne une unité de traitement de fluide pour recevoir un fluide devant être traité et délivrer le fluide sous la forme de fluide traité. L'unité comprend un passage d'écoulement, au moins un composant d'interaction de fluide, ou est apte à recevoir au moins un composant d'interaction de fluide, le ou au moins l'un des composants d'interaction de fluide comprenant des moyens de dosage pour doser une substance dans le fluide s'écoulant à travers l'unité de traitement. L'unité comprend de plus un ou plusieurs éléments de transfert de chaleur pour échanger de la chaleur avec le fluide s'écoulant à travers le dispositif, et un ou plusieurs moyens d'augmentation de pression totale pour augmenter la pression totale du fluide devant être traité au moins localement dans l'unité de traitement de fluide. L'unité comprend de plus une enceinte encapsulant le ou les éléments de transfert de chaleur, le ou les moyens d'augmentation de pression totale et le ou les composants d'interaction de fluide. L'enceinte forme au moins une partie de la paroi de l'unité de traitement de fluide qui confine du fluide dans l'unité de traitement, de telle sorte que du fluide peut s'écouler dans/hors de l'unité de traitement à travers un ou plusieurs orifices d'entrée et orifices de sortie réalisés dans l'enceinte. L'invention porte de plus sur une cassette comprenant un ou plusieurs des éléments décrits ci-dessus et sur un procédé pour traiter un fluide, le procédé comprenant l'alimentation en fluide devant être traité d'une unité de traitement de fluide comme décrit ci-dessus.
PCT/DK2008/050205 2007-08-17 2008-08-15 Procédé et unité pour traiter un fluide WO2009024154A1 (fr)

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DKPA200701181 2007-08-17

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US8623212B2 (en) 2010-08-24 2014-01-07 Qwtip Llc Water treatment and revitalization system and method
US9474991B2 (en) 2011-08-24 2016-10-25 Qwtip, Llc Water treatment system and method
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US9714176B2 (en) 2012-02-28 2017-07-25 Qwtip Llc Desalination and/or gas production system and method
US9878636B2 (en) 2012-02-29 2018-01-30 Qwtip Llc Levitation and distribution system and method
CN108191060A (zh) * 2018-02-01 2018-06-22 南京信息工程大学 一种装配式污水生物处理实验装置及其工艺配置方法
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EP1717208A1 (fr) * 2005-04-28 2006-11-02 Grundfos Management A/S Dispositif de traitement de fluides, en particulier de traitement des eaux usées, avec une pile de disques

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CA2217416A1 (fr) * 1997-10-06 1999-04-06 Brasfilter Industria E Comercio Ltda. Module electronique d'echange thermique et purificateur d'eau utilisant un tel module
US6586172B1 (en) * 1998-10-02 2003-07-01 Iatros Limited Device for treatment of biological fluids
US20020033369A1 (en) * 1999-07-16 2002-03-21 Jim Bender Decontamination of water by photolytic oxidation/reduction utilizing near blackbody radiation
EP1717208A1 (fr) * 2005-04-28 2006-11-02 Grundfos Management A/S Dispositif de traitement de fluides, en particulier de traitement des eaux usées, avec une pile de disques

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US9605663B2 (en) 2010-08-24 2017-03-28 Qwtip Llc System and method for separating fluids and creating magnetic fields
US11339767B2 (en) 2010-08-24 2022-05-24 Qwtip Llc Disk array and disk-pack turbines
US8623212B2 (en) 2010-08-24 2014-01-07 Qwtip Llc Water treatment and revitalization system and method
US8636910B2 (en) 2010-08-24 2014-01-28 Qwtip Llc Water treatment and revitalization system and method
US10790723B2 (en) 2010-08-24 2020-09-29 Qwtip Llc Disk-pack turbine
US10576398B2 (en) 2011-08-24 2020-03-03 Qwtip Llc Disk-pack turbine
US11045750B2 (en) 2011-08-24 2021-06-29 Qwtip Llc Water treatment system and method
US11919011B2 (en) 2011-08-24 2024-03-05 Qwtip Llc Retrofit attachments for water treatment systems
US11759730B2 (en) 2011-08-24 2023-09-19 Qwtip Llc Water treatment system
US11628384B2 (en) 2011-08-24 2023-04-18 Qwtip Llc Water processing system and arrangement
US11344898B2 (en) 2011-08-24 2022-05-31 Qwtip Llc Disk-pack turbine for water treatment systems
US10463993B2 (en) 2011-08-24 2019-11-05 Qwtip Llc Water treatment system and water
WO2013029016A2 (fr) * 2011-08-24 2013-02-28 Qwtip Llc Éléments de rééquipement à fixer pour systèmes de traitement d'eau
US10682653B2 (en) 2011-08-24 2020-06-16 Qwtip Llc Disk-pack turbine
US9469553B2 (en) 2011-08-24 2016-10-18 Qwtip, Llc Retrofit attachments for water treatment systems
WO2013029016A3 (fr) * 2011-08-24 2013-06-27 Qwtip Llc Éléments de rééquipement à fixer pour systèmes de traitement d'eau
US9474991B2 (en) 2011-08-24 2016-10-25 Qwtip, Llc Water treatment system and method
US11141684B2 (en) 2011-08-24 2021-10-12 Qwtip Llc Water treatment system and method
US11192798B2 (en) 2012-02-28 2021-12-07 Qwtip Llc Gas production method using water as the source
US10464824B2 (en) 2012-02-28 2019-11-05 Qwtip Llc Gas production system and method
US11780743B2 (en) 2012-02-28 2023-10-10 Qwtip Llc Disk-pack turbine
US11814302B2 (en) 2012-02-28 2023-11-14 Qwtip Llc Water dissociation system
US9714176B2 (en) 2012-02-28 2017-07-25 Qwtip Llc Desalination and/or gas production system and method
US10807478B2 (en) 2012-02-29 2020-10-20 Qwtip Llc Levitation and distribution system and method
US9878636B2 (en) 2012-02-29 2018-01-30 Qwtip Llc Levitation and distribution system and method
CN108191060A (zh) * 2018-02-01 2018-06-22 南京信息工程大学 一种装配式污水生物处理实验装置及其工艺配置方法
CN108191060B (zh) * 2018-02-01 2023-11-28 南京信息工程大学 一种装配式污水生物处理实验装置及其工艺配置方法

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