EP4374120A1 - Dispositif de séchage et procédé de séchage d'unités de récipient présentant un solvant - Google Patents

Dispositif de séchage et procédé de séchage d'unités de récipient présentant un solvant

Info

Publication number
EP4374120A1
EP4374120A1 EP22751641.6A EP22751641A EP4374120A1 EP 4374120 A1 EP4374120 A1 EP 4374120A1 EP 22751641 A EP22751641 A EP 22751641A EP 4374120 A1 EP4374120 A1 EP 4374120A1
Authority
EP
European Patent Office
Prior art keywords
fluid flow
drying
container
drying chamber
unit
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.)
Pending
Application number
EP22751641.6A
Other languages
German (de)
English (en)
Inventor
Wilko Harms
Ulf Reinhardt
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.)
Belvac Production Machinery Inc
Original Assignee
Belvac Production Machinery Inc
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 Belvac Production Machinery Inc filed Critical Belvac Production Machinery Inc
Publication of EP4374120A1 publication Critical patent/EP4374120A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/18—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by endless belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/001—Handling, e.g. loading or unloading arrangements
    • F26B25/003—Handling, e.g. loading or unloading arrangements for articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/008—Seals, locks, e.g. gas barriers or air curtains, for drying enclosures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/009—Alarm systems; Safety sytems, e.g. preventing fire and explosions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried

Definitions

  • the invention relates to a drying device and a method for drying container units containing solvent, in particular cans, for example cans made of aluminum or steel, which are intended in particular for storing food and beverages.
  • Drying devices for drying solvent-containing container units are known in principle. Such drying devices are provided, for example, as a continuous oven with a conveyor belt, the cans being moved through the oven by means of the conveyor belt and hot air being applied to them at the same time. Furthermore, such drying devices can have chains with pins for conveying the cans.
  • Such an oven usually has several drying chambers arranged one behind the other, in which water evaporates, the cans are heated to a target temperature and remain at the target temperature for a predefined period of time in order to remove water from the cans and/or also to polymerize a coating guarantee.
  • Such an oven is also referred to as a paint drying oven, which is designed in particular to dry and/or polymerize an internal coating and/or an external coating of a can.
  • exhaust air fans which transport the air out of the drying chambers, is particularly energy-intensive. Since such an oven can dry and polymerize up to 6,000 cans per minute, the amount of exhaust air required is high. A high volume of exhaust air also means that more fresh air has to be supplied to the drying chambers. This fresh air is usually heated to a predefined temperature by means of a gas burner in order to be fed to the drying chamber mixed with circulating air.
  • Such ovens are usually controlled on the basis of a minimum amount of exhaust air, which must not be undercut during operation.
  • the minimum amount of exhaust air is determined specifically for a furnace.
  • the minimum amount of exhaust air is determined on the basis of a maximum number of cans per minute and on the basis of a maximum can size.
  • WO 2016/124673 A1 describes setting an exhaust air volume in the event of a cold start or when the supply of cans is interrupted to a first value and a second value, the first value being suitable for the drying process and the second value being a rinsing setting with a rinsing time of 5 -10 minutes allowed. Setting a first value and a second value of the exhaust air volume does not enable efficient control of the exhaust air volume, since the actual exhaust air volume cannot be precisely matched to an optimal exhaust air volume.
  • WO 2014/166 831 A1 discloses a method and a device for minimizing the exhaust air from a drying room, with an adjusting element being provided for switching between supply air and circulating air. The actuating element is controlled on the basis of the humidity of the air in the drying room.
  • a drying device for drying container units containing solvent, in particular cans comprising a drying chamber with an input side and an output side, in which the container units can be charged with a process fluid, a conveyor unit which is arranged and is designed to move the container units through the drying chamber from the input side to the output side, a fluid flow device which is arranged and configured to provide the process fluid and to apply a fluid flow of the process fluid to the container units within the drying chamber, and a control device, which is set up to control the fluid flow device based on a determined solvent entry.
  • the invention is based, inter alia, on the finding that a significant factor influencing the control of the fluid flow device is the introduction of solvent into the drying chamber.
  • the inventors have found that, for efficient control of the fluid flow device, it is advantageous if there is no predetermined value for the solvent input, but rather a determined one
  • Solvent entry is taken as a basis.
  • the approach known from the European standard EN 1539, of directly measuring the proportion of solvent in the drying chamber, ensures the safety of the oven, but cannot guarantee energy-efficient operation.
  • the determination of the solvent input ensures safety according to the standard regardless of the degree of drying and thus also eliminates the problem that the solvent content is dependent on the temperature in the drying chamber.
  • Such a drying device can be controlled with a precisely adjusted fluid flow, wherein in particular a fluid flow of the process fluid flowing out of the drying chamber can be adjusted as required.
  • the energy consumption of the drying device for drying the container units is reduced. This reduces the amount of energy required to produce a single can and has an improved environmental footprint.
  • the invention is also based on the finding that the minimum amount of exhaust air is often oversized when the number of cans per minute and/or when the cans are smaller. The inventors have therefore found that the minimum amount of exhaust air can be determined dynamically.
  • Drying devices of the type mentioned can also be designed as internal baking ovens.
  • the drying device is preferably designed as a continuous oven or as a continuous dryer. Further preferably, the drying device can be designed as a paint drying oven. Furthermore, it can be preferred that the drying device is designed as a pin oven.
  • the container units are, for example, cans, in particular for storing food and/or beverages. Such container units can be made of steel or aluminum, for example. In addition, such container units usually have a varnish. This paint is applied to the outer and/or inner surfaces of the container units in a previous process step, this paint containing solvents. As a rule, paint is dried on an outer surface in what is known as a pin oven and paint is dried on the inner surface in an internal baking oven, also known as an IBO.
  • the paint is dried and polymerized so that the solvents are removed from the container units.
  • the solvent content within the drying chamber for example the solvent dissolved in the air in the drying chamber, does not exceed a predefined value. Above a certain value of the solvent there is a risk of explosion, which must be avoided.
  • the drying device includes the drying chamber with an input side and an output side.
  • the drying chamber preferably has a chamber inlet on the inlet side for the container units to enter and a chamber outlet on the outlet side for the container units to exit.
  • the drying chamber preferably has one, two or more fluid supplies, which are in particular fluidically coupled to the fluid flow device.
  • the drying chamber is designed to be essentially fluid-tight, for example by means of a chamber wall.
  • the drying chamber is designed in such a way that the container units can be moved from the input side to the output side by means of the conveyor unit. It is particularly preferred that the conveyor unit extends through the drying chamber.
  • the conveyor unit can have a conveyor belt, for example, on which the container units can be arranged.
  • the conveyor unit can be designed in particular as a belt conveyor. It is further preferred that the conveying unit moves the container units with a substantially horizontally aligned direction of movement.
  • the conveyor unit can be designed as a chain with transport pins with which the container units can be held.
  • One such a conveyor unit is provided in particular in a pin furnace, in which the chain is usually guided in a meandering manner.
  • the fluid flow device is arranged and designed to provide the process fluid, in particular air, for example by conveying the process fluid from the environment into the drying chamber.
  • the fluid flow device is arranged and designed to apply a fluid flow of the process fluid to the container units within the drying chamber.
  • the fluid flow can be given, for example, in cubic meters per hour.
  • the process fluid is in particular gaseous.
  • the fluid flow device preferably has three functionalities, namely applying the process fluid to the container units, causing the process fluid to flow out of the drying chamber and causing the process fluid to flow into the drying chamber. Furthermore, the fluid flow device can be arranged and configured to cause air recirculation.
  • the fluid flow device preferably has a first fluid flow unit, which is designed to convey the process fluid out of the drying chamber.
  • the fluid flow device is preferably designed as an exhaust air unit, in particular as an exhaust air fan.
  • the exhaust air fan is preferably designed to convey the process fluid out of the drying chamber.
  • the fluid flow device preferably has a second fluid flow unit for generating a circulating air of the process fluid within the drying chamber.
  • the fluid flow device has a third fluid flow unit, which controls an inflow of the process fluid into the drying chamber.
  • the third fluid flow unit can be designed, for example, as a flap or as a fan.
  • the first and/or second fluid flow unit can also be designed as a fan.
  • the drying device may also include two or more fluid flow devices. It is particularly preferred that the drying device has two or more drying chambers. It is preferred that each of the two or more drying chambers has an associated fluid flow device. Alternatively it can be provided that a fluid flow device effects the fluid flows of the two or more drying chambers.
  • the drying device also includes the control device, which is set up to control the fluid flow device based on a determined entry of solvent.
  • the determined solvent entry is determined and not specified or provided, for example by an upstream production facility.
  • the drying device can have measuring units for this purpose in order to record measured values on the basis of which the solvent entry can be determined.
  • an indirect determination of the solvent entry is also possible, for example via a container unit density, a speed of the conveyor unit and/or via a size of the container units.
  • the control device is preferably signal-coupled to the fluid flow device.
  • the control device is preferably set up to set the fluid flow device essentially steplessly as a function of the determined introduction of solvent in order to apply the fluid flow to the container units having a predefined fluid flow property.
  • the fluid flow property can be, for example, a fluid pressure, which is specified, for example, in pascals (Pa), and/or a fluid volume flow, which can be specified, for example, in cubic meters per hour.
  • Substantially continuously means in particular substantially continuously.
  • Substantially stepless can also mean that the fluid flow device is not adjusted discretely.
  • Substantially stepless can also mean that a set fluid flow, for example measured in volume per unit of time, deviates by less than 10%, less than 5% or less than 2.5% from a predefined fluid flow, for example specified in volume per unit of time.
  • substantially infinitely variable can mean that the fluid flow device is adjustable with more than 10 levels, more than 20 levels or more than 100 levels.
  • substantially stepless can mean that a step spacing between two consecutive steps is less than 10% of an adjustment range of the fluid flow device than 5% of the setting range or less than 2.5% of the setting range.
  • control device can be set up to control the fluid flow device directly based on a container unit density.
  • a preferred embodiment of the drying device is characterized in that the control device is set up to determine a target fluid flow as a function of the solvent input and to control the fluid flow device in such a way that a fluid flow flowing out of the drying chamber corresponds at least to the target fluid flow.
  • a fluid flow flowing out of the drying chamber corresponds at least to the desired fluid flow means in particular that a difference between the fluid flow flowing out and the desired fluid flow is less than 30%, less than 20%, less than 10% or less than 5%.
  • a control device set up in this way has the advantage that the outflowing fluid flow only assumes a value that is required taking into account the actual solvent input. Thus, the energy consumption of the fluid flow device is not higher than required for the process.
  • the target fluid flow is selected in such a way that a solvent content in the drying chamber does not exceed a predetermined value.
  • the solvent is present in the drying chamber, in particular in gaseous form.
  • the solvent can in particular be dissolved in the fluid, in particular air, located in the drying chamber.
  • the solvent content can be given, for example, in grams of solvent per cubic meter of air.
  • the solvent content can also be specified as a percentage, for example.
  • the target fluid flow can also be referred to as a minimum fluid flow.
  • the predetermined value represents an explosive limit. Above a certain solvent content in the drying chamber there is a risk of an explosion. As a rule, it is imperative to avoid that the solvent content reaches this limit. In this respect, one energy-efficient drying device allows, while at the same time a high level of security against explosions is guaranteed.
  • a further preferred embodiment of the drying device is characterized in that the control device has a safety unit which is set up so that the fluid stream flowing out of the drying chamber cannot be adjusted by an operator during normal operation.
  • the function of the security unit is also referred to as locking.
  • Not adjustable by an operator means in particular that the outflowing fluid flow can be adjusted by no more than 10%, no more than 5% or no more than 2.5%.
  • In normal operation means in particular that an operator cannot change the outflowing fluid flow without special qualifications. Special skills can be, for example, knowledge of a password or possession of a key.
  • Such a safety unit has the advantage that the drying device can always be operated at an energetic optimum and no significant manual manipulations are possible during normal operation.
  • the safety of the drying device can thus be improved since an operator cannot adjust the fluid flow device in such a way that an explosive mixture is produced in the drying chamber.
  • the control device is set up to control the fluid flow device in such a way that the fluid flow flowing out of the drying chamber essentially corresponds to a fluid flow flowing into the drying chamber. This can be done, for example, by controlling an exhaust air fan and/or an air supply flap or an air supply fan.
  • the fact that the inflowing fluid flow essentially corresponds to the outflowing fluid flow means in particular that the difference between the inflowing fluid flow and the outflowing fluid flow is less than 30%, less than 20%, less than 10% or less than 5%.
  • Such a control essentially avoids the process fluid flowing into or out of the drying chamber through inlets or outlets of the container units.
  • a preferred development of the drying device is also characterized in that the control device is set up, the solvent entry based on a container unit density, describing a in the Drying chamber to determine incoming container unit number per unit of time and / or based on a solvent amount per container unit.
  • Container unit density may be expressed, for example, in containers per minute, e.g. 2500 cans per minute.
  • the amount of solvent per container unit depends on various parameters of the container units. For example, the amount of solvent can be determined by the size of the container unit, the type of paint on the container unit and a paint thickness. The amount of solvent per container unit can be specified in grams, for example.
  • a further preferred embodiment variant of the drying device is characterized in that it comprises a density measuring unit which is set up to record the container unit density. In particular, the density measuring unit is coupled in terms of signals to the control device.
  • the density measurement unit can be a counting unit, for example.
  • the density measuring unit preferably includes one, two or more optical sensors, for example light barriers, inductance sensors, color sensors and/or infrared sensors.
  • the density measuring unit can have inductance sensors, capacitance sensors, magnetic sensors and/or proximity sensors, for example ultrasonic sensors.
  • the density measurement sensors can be designed as such.
  • the density measuring unit can have a camera or a line control.
  • the density measurement unit has two or more density measurement sensors for redundantly detecting the container unit density.
  • Two or more density measuring sensors enable the container unit density to be reliably detected, so that the solvent entry determined by means of the container unit density is determined with a high level of certainty.
  • the drying device comprises a condition measuring unit which is arranged and designed to detect a container condition, and wherein the control device is set up to measure a quantity of solvent per container unit, based on the detected container condition to determine.
  • the quality measuring unit is coupled in terms of signals to the control device.
  • the amount of solvent per container unit can be determined, for example, based on a size of the container units, in particular a lateral surface and/or a height, a paint type and/or a color of the container unit.
  • the condition measuring unit can be, for example, a light barrier for determining the size of the container units.
  • condition measuring unit can be a camera for detecting the condition of the container. It is particularly preferred that the condition measurement unit has two or more condition measurement sensors, so that a high determination accuracy can be implemented by means of a redundant measurement.
  • the container properties are a lateral surface, a height and/or a color of the container units.
  • the lateral surface of a container unit relates in particular to a peripheral surface of the container unit.
  • the height of a container unit describes in particular the length of the container unit starting from a floor.
  • a further preferred development of the drying device is characterized in that it comprises a fluid flow measuring unit for detecting the fluid flow flowing out of the drying chamber and/or a fluid flow flowing into the drying chamber.
  • the fluid flow measuring unit preferably has two or more fluid flow measuring sensors for redundantly detecting the fluid flow.
  • the drying device can have a fluid outlet, for example, which is arranged and designed in such a way that the fluid stream can flow out of the drying chamber through it. It is preferred that the fluid flow measuring unit, in particular the two or more fluid flow measuring sensors, act inside the fluid outlet, so that a high determination accuracy can be implemented.
  • a further preferred embodiment variant of the drying device comprises a heating device for heating the process fluid flowing into the drying chamber, the heating device preferably having a combustion unit, in particular a gas burner, and a tubular element which at least partially surrounds the combustion unit, the tubular element having fluid guide elements arranged in such a way on an inner peripheral side, that the process fluid flowing into the tubular element has a twist within the tubular element.
  • the heating device preferably having a combustion unit, in particular a gas burner, and a tubular element which at least partially surrounds the combustion unit, the tubular element having fluid guide elements arranged in such a way on an inner peripheral side, that the process fluid flowing into the tubular element has a twist within the tubular element.
  • Combustion can be optimized by such a tubular element.
  • the flame manipulated by the tubular member has a helical shape.
  • the process fluid entrained by the flame impulse is also set in rotation, which enables greater stability of the energy transfer.
  • the uniformity of heating in the drying chamber can be optimized.
  • it comprises a guide device arranged adjacent to the input side for guiding the container units onto a side section of the conveyor unit.
  • the conveyor unit can have, for example, a left-hand side section and a right-hand side section.
  • the side section can take up any extension of the width of the conveyor unit, for example 50% of the width.
  • the guide device can be, for example, a beam arranged above the conveyor unit, the clear height of which above the conveyor unit is less than a height of the container units.
  • the control device is preferably set up to control the guide device as a function of the container unit density in such a way that the
  • Container units are moved through the drying chamber at a predetermined distance.
  • the container units can be moved compactly through the drying chamber, in particular with little or no spacing.
  • the fluid flow device is arranged and configured to direct the fluid flow onto the side section.
  • the section of the conveyor unit in which no container units are moved is essentially not acted upon by the fluid flow.
  • the fluid flow device can, for example, have fluid flow nozzles arranged such that they can be switched off and/or moved, in particular pivoted.
  • the control device is set up to control the fluid flow device in such a way that the fluid flow is directed onto the side section.
  • the two or more drying chambers are fluidically coupled to one another in such a way that a process fluid of a drying chamber is conducted into a drying chamber that precedes the process.
  • the drying device comprises a fluid barrier device at a container unit inlet and/or at a container unit outlet, the fluid barrier device having a height-adjustable fluid outlet for setting a clear height above the conveyor unit, and preferably the control device being set up is to set the clear height depending on the height of the container units.
  • the object mentioned at the outset is achieved by a method for drying container units containing solvent, in particular cans, comprising the steps of: moving the container units through a drying chamber, determining the entry of solvent into the drying chamber caused by the container units, subjecting the container units to a fluid flow of a process fluid and adjusting a fluid flow flowing out of the drying chamber, based on the determined solvent entry.
  • FIG. 1 a schematic, two-dimensional view of an exemplary embodiment of a drying device
  • FIG. 2 a schematic, two-dimensional plan view of the drying device shown in FIG. 1;
  • FIG. 3 a schematic, two-dimensional detailed view of the drying device shown in FIG. 1 with a container unit entry;
  • FIG. 4 a schematic view of an exemplary embodiment of a method.
  • Figure 1 shows a drying device 100 with a first drying chamber 102, a second drying chamber 104 and a third drying chamber 106. Furthermore, the drying device 100 includes a cooling section 142.
  • a drying device 100 with a first drying chamber 102, a second drying chamber 104 and a third drying chamber 106. Furthermore, the drying device 100 includes a cooling section 142.
  • Conveyor unit 112 extends through the drying chambers 102, 104, 106 and the cooling section 142. Container units 1 are moved through the drying device 100 by means of the conveyor unit 112.
  • the drying chambers 102, 104, 106 have a similar structure, so that only the drying chamber 102 is described in detail below, with these explanations also applying to the drying chamber 104 and the drying chamber 106 with the necessary changes.
  • the drying chamber 102 extends in a horizontal direction from an entry side 108 where the container units enter the drying chamber 102 to an exit side 110 where the container units 1 leave the drying chamber 102 again.
  • the drying device 100 has a fluid flow device 114 which is fluidically coupled to the drying chamber 102 .
  • the drying apparatus 100 further includes a second fluid flow device 168 fluidly coupled to the drying chamber 104 and a third fluid flow device 170 fluidly coupled to the drying chamber 106 .
  • the fluid flow device 114 has a fluid inlet 116 through which a process fluid, here air, can enter the fluid flow device 114 .
  • a supply air fan 118 is arranged in a fluid flow direction downstream of the fluid inlet 116 and guides the air flowing into the fluid flow device 114 to a heating device 120 .
  • the supply air fan 118 can also be designed as a flap.
  • the heating device 120 can be a gas burner, for example.
  • a circulating air fan 122 is arranged downstream of the heating device 120 and causes a fluid flow into the drying chamber 102 .
  • the circulating air fan 122 is fluidically coupled to the drying chamber 102 with a fluid guide 124 .
  • the fluid flow device 114 has a first fluid distribution unit 126, which in the present case is embodied as a V-aperture.
  • a second fluid distribution unit 128 is provided downstream, which ensures a further optimized distribution of the process fluid.
  • the second fluid distribution unit 128 is designed as a perforated plate. From there, the air reaches the container units 1 , which are moved under the fluid flow unit 114 by means of the conveyor unit 112 .
  • the conveyor unit 112 is preferably designed to be air-permeable. As a result, after the air has passed the container units 1, it passes under the conveyor unit 112, where it meets a fluid collection channel 138.
  • the fluid collection channel 138 returns the process fluid to the heating device 120 by means of a circulating air duct 131.
  • the use of such circulating air reduces the energy requirement of the fluid flow device 114. In order not to exceed a maximum value of a solvent content in the drying chamber 102, part of the process fluid should flow out of the drying chamber 102.
  • the fluid flow device 114 has a fluid outlet 132 which is fluidically coupled to an exhaust air fan 134 .
  • a fluid flow measuring unit 136 is arranged at the fluid outlet 132, which is arranged and designed to measure a fluid flow flowing out of the drying chamber 102, for example in cubic meters per hour.
  • the drying device 100 has a density measuring unit 130 for determining the number of containers entering the drying chamber 102 per unit of time. Furthermore, a condition measuring unit 133 is provided, by means of which at least one container unit condition can be determined.
  • a control device 140 is set up to control the fluid flow device 114 based on a determined solvent input.
  • Control device 140 is set up, in particular, to determine a target fluid flow to flow out of drying chamber 102 as a function of the introduction of solvent and to control fluid flow device 114 in such a way that a fluid flow flowing out of drying chamber 102 corresponds at least to the target fluid flow.
  • the target fluid flow can be, for example, a minimum fluid flow that is selected such that a solvent content in the drying chamber 102 does not exceed a predetermined value, with the predetermined value preferably representing an explosion limit.
  • the control device 140 is set up in particular to determine the solvent entry based on a container unit density, describing the container units 1 entering the drying chamber 102 per unit of time and/or based on a solvent quantity per container unit 1 .
  • the container unit density can also be provided as a value of the control device 140, in particular by a device arranged upstream of the drying device 100, for example a paint shop.
  • the control device 140 is coupled in particular to the density measuring unit 130 and the texture measuring unit 133 in terms of signals, so that the control device 140 can determine the solvent entry on the basis of measured values from the density measuring unit 130 and the texture measuring unit 133 .
  • FIG. 2 shows a plan view of the drying device 100 described above. It can be seen here in particular that the drying device 100 has a guide device 156 for guiding the container units 1 onto a side section 158 of the conveyor unit 112 .
  • the dashed line represents the delimitation of the side section 158. It can be seen that the section of the conveyor unit 112 adjacent to the side section 158 has no container units 1.
  • the fluid flow device 114 can be controlled by the control device 140 in such a way that only the side section 158 is acted upon by the process fluid and the area in which there are no container units 1 is not or is reduced.
  • only the first fluid outlet 160 is active, so that only the container units 1 located below the first fluid outlet 160 are acted upon by the process fluid.
  • the second fluid outlet 162 is deactivated so that process fluid does not escape unnecessarily here.
  • Figure 3 shows a detailed view of the inlet side 108 of the drying chamber 102.
  • the drying device 100 comprises a fluid barrier device 164 at the container unit inlet, the fluid barrier device 164 having a height-adjustable fluid outlet 166 for setting a clear height above the conveyor unit 112.
  • control device 140 is set up to set the clear height as a function of the height of the container units 1 .
  • the clear height is preferably set so that it is slightly greater than the height of the container units 1 so that as little process fluid as possible can flow out of the interior of the drying chamber or enter the drying chamber 102 from the outside in the event of negative pressure.
  • FIG. 4 shows a method for drying container units 1 containing solvent, in particular cans.
  • container units 1 are moved through a drying chamber 102,104,106.
  • the introduction of solvent into the drying chamber 102, 104, 106 caused by the container units 1 is determined.
  • the container units 1 are subjected to a fluid stream of a process fluid.
  • a fluid stream flowing out of the drying chamber 102, 104, 106 is adjusted based on the determined entry of solvent.
  • a more efficient operation of the drying device 100 described above is possible.
  • the fluid flow device 114, 168, 170 of the drying device 100 by optimizing the fluid flow device 114, 168, 170 of the drying device 100, significant energy can be saved, since the fluid flow device 114, 168, 170, in particular the individual fans, have a high energy consumption.
  • the fluid flow device 114 can be controlled in a targeted manner on the basis of the solvent input, so that on the one hand the operation is optimal in terms of energy and on the other hand a sufficient exchange of air is generated so that the solvent content does not exceed a preferably predefined maximum value.
  • drying device 102 first drying chamber 104 second drying chamber

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

L'invention concerne un dispositif de séchage (100) pour le séchage d'unités de récipient (1), en particulier des canettes, présentant un solvant, comprenant une chambre de séchage (102, 104, 106) ayant un côté d'orifice d'entrée et un côté d'orifice de sortie, dans lequel un fluide de traitement peut être appliqué aux unités de récipient (1), une unité de transport (112) qui est agencée et configurée pour déplacer les unités de récipient (1) à travers la chambre de séchage (102, 104, 106) depuis le côté d'orifice d'entrée jusqu'au côté d'orifice de sortie, un dispositif d'écoulement de fluide (114) qui est agencé et configuré pour fournir le fluide de traitement et pour appliquer un écoulement de fluide du fluide de traitement aux unités de récipient (1) à l'intérieur de la chambre de séchage (102, 104, 106), et un dispositif de commande (140) qui est conçu pour la commande du dispositif d'écoulement de fluide (114) en fonction d'un apport de solvant déterminé.
EP22751641.6A 2021-07-19 2022-07-11 Dispositif de séchage et procédé de séchage d'unités de récipient présentant un solvant Pending EP4374120A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021118534.3A DE102021118534A1 (de) 2021-07-19 2021-07-19 Trocknungsvorrichtung und Verfahren zur Trocknung von Lösemittel aufweisenden Behältereinheiten
PCT/DE2022/100497 WO2023001331A1 (fr) 2021-07-19 2022-07-11 Dispositif de séchage et procédé de séchage d'unités de récipient présentant un solvant

Publications (1)

Publication Number Publication Date
EP4374120A1 true EP4374120A1 (fr) 2024-05-29

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Application Number Title Priority Date Filing Date
EP22751641.6A Pending EP4374120A1 (fr) 2021-07-19 2022-07-11 Dispositif de séchage et procédé de séchage d'unités de récipient présentant un solvant

Country Status (5)

Country Link
EP (1) EP4374120A1 (fr)
CN (1) CN117957415A (fr)
CA (1) CA3225943A1 (fr)
DE (1) DE102021118534A1 (fr)
WO (1) WO2023001331A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7716372U1 (de) * 1977-05-24 1977-10-27 Hinterkopf, Kurt G., 7332 Eislingen Durchlauftrockner fuer tuben, huelsen oder aehnliche gegenstaende
JPH06159939A (ja) * 1992-11-24 1994-06-07 Mitsubishi Materials Corp 筒状体の乾燥方法およびこれに用いる乾燥装置
DE102010043087A1 (de) * 2010-10-28 2012-05-03 Dürr Systems GmbH Prozesskammer mit Vorrichtung zum Einblasen von gasförmigen Fluid
JP5929190B2 (ja) * 2011-12-28 2016-06-01 日産自動車株式会社 電極乾燥方法および電極乾燥装置
DE102012003299A1 (de) * 2012-02-18 2013-08-22 Eisenmann Ag Verfahren zum Behandeln von Gegenständen und Anlage hierfür
DE102013206272B3 (de) 2013-04-10 2014-07-03 Kba-Metalprint Gmbh Bandtrockner mit einem Trocknungsraum und mit einer Kühlkammer
DE102015202163B4 (de) 2015-02-06 2016-12-29 Kba-Metalprint Gmbh Verfahren zum automatisierten Betreiben einer Trocknungsanlage
IT201600074962A1 (it) * 2016-07-18 2018-01-18 Geico Spa Impianto di essiccazione di oggetti verniciati

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WO2023001331A1 (fr) 2023-01-26
CA3225943A1 (fr) 2023-01-26
DE102021118534A1 (de) 2023-01-19
CN117957415A (zh) 2024-04-30

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