EP3892364B1 - Système de dosage et de mélange destiné à la production d'une solution ou d'une suspension contenant du chlore à partir d'un solide coulant contenant du chlore, et procédé pour l'operation du système de dosage et de mélange - Google Patents

Système de dosage et de mélange destiné à la production d'une solution ou d'une suspension contenant du chlore à partir d'un solide coulant contenant du chlore, et procédé pour l'operation du système de dosage et de mélange Download PDF

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Publication number
EP3892364B1
EP3892364B1 EP21163324.3A EP21163324A EP3892364B1 EP 3892364 B1 EP3892364 B1 EP 3892364B1 EP 21163324 A EP21163324 A EP 21163324A EP 3892364 B1 EP3892364 B1 EP 3892364B1
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EP
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Prior art keywords
air
dosing
suction
mixing
container
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EP21163324.3A
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German (de)
English (en)
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EP3892364A1 (fr
EP3892364B8 (fr
EP3892364C0 (fr
Inventor
Human Farkhar
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WITTY & Co KG GmbH
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Witty & Co KG GmbH
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Priority to HRP20230898TT priority Critical patent/HRP20230898T1/hr
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Publication of EP3892364C0 publication Critical patent/EP3892364C0/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F21/00—Dissolving
    • B01F21/10—Dissolving using driven stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/181—Preventing generation of dust or dirt; Sieves; Filters
    • B01F35/187—Preventing generation of dust or dirt; Sieves; Filters using filters in mixers, e.g. during venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/718—Feed mechanisms characterised by the means for feeding the components to the mixer using vacuum, under pressure in a closed receptacle or circuit system

Definitions

  • the invention relates to a dosing and mixing system for producing a chlorine-containing solution or suspension from a chlorine-containing, free-flowing solid according to the preamble of claim 1.
  • Such systems are required, among other things, for the production of calcium hypochlorite (CHC) suspensions for the disinfection of swimming and bathing pool water, with the water in public baths having to have a chlorine content prescribed by law.
  • CHC calcium hypochlorite
  • the swimming pool or bathing pool water must be enriched with chlorine, which can be done, for example, by adding a chlorine-containing suspension solution to the swimming pool.
  • the suspension solution is produced by adding calcium hypochlorite, for example, to the preparation water or water taken from the swimming pool.
  • Such a chlorination system can typically have a storage tank with a free-flowing chlorine substance, in particular calcium hypochlorite or another hypochlorite, which is conveyed via a suction device into a mixing tank for mixing with the preparation or swimming pool water, where the chlorine-containing substance is dissolved or suspended by means of stirring devices.
  • a free-flowing chlorine substance in particular calcium hypochlorite or another hypochlorite
  • the treated or to be treated swimming pool water is transferred via circulation circuits between the swimming pool and the mixing tank or metered monodirectionally.
  • Such a chlorination plant is, for example, from the U.S. 2014 0269 153 A1 known.
  • the processing of the suspension described above produces by-products that are toxic to the human organism, such as exhaust air mixed with chlorine dust, which can represent an acute health hazard for swimming pool staff and visitors, especially in closed rooms. Furthermore, for swimming pool personnel of such chlorination systems, handling, in particular, storage containers that are open or have to be refilled or replaced is not advantageous from a health point of view. To avoid Additives such as acids are often used in the preparation of the solution or suspension to prevent clumping and to improve the solubility and to set a specific pH value.
  • suspensions are also produced with a high chlorine content in some cases, with very high amounts of calcium being released which, if the solubility product in the prepared water is exceeded, in conjunction with the anions present in the water , especially carbonates, precipitate as lime.
  • the precipitated lime sediments on the bottom of the mixing tank in which the suspension is created. This leads to deposits that are difficult to dissolve (so-called "chlorine sludge”), which can lead to blockages in the mixing and dosing system.
  • a further object of the invention is therefore to avoid the formation of deposits that are difficult to dissolve in the mixing container and in other assemblies of the metering and mixing system.
  • the dosing and mixing system for producing a chlorine-containing solution or suspension from a chlorine-containing, free-flowing solid has a water inlet and a material inlet for the mixing tank containing the free-flowing solid, as well as a reservoir holding the free-flowing solid. Furthermore, a suction line connecting the mixing container and the storage container, a suction device attached to the mixing container to generate suction pressure for conveying the free-flowing solid into the mixing container and a blocking device for selectively connecting the mixing container to the ambient air to interrupt the conveyance of the free-flowing solid into the mixing container are provided .
  • the dosing and mixing system can be located in an essentially closed room.
  • the suction device sucks in air from the environment in order to control the suction of the free-flowing solids from the storage container, and the suction device is assigned an air filter upstream or downstream, so that the air sucked in from the environment by the suction device is filtered and, in particular, of chlorine components can be freed.
  • suction device is to be understood generically and means any device that can be used as a volume conveyor and/or vacuum source.
  • a control device for activating the suction device and the blocking device is also provided, the control device for activating the suction device and the blocking device being set up in a first operating mode essentially for conveying the free-flowing solid and in a second operating mode for treating exhaust air or room air.
  • the first operating mode takes place independently, especially at different times, from the second operating mode.
  • the first operating mode is carried out with the locking device closed and the second operating mode with the locking device open.
  • the air from the mixing and storage tank can also be exchanged and processed.
  • the dosing and mixing system can be used both for air treatment and for the production of suspensions.
  • the same or other filters can be used to filter out other air components such as suspended matter or aerosols (humidity).
  • the suction device in particular can be protected from moisture and increased wear.
  • the suction behavior of the free-flowing solid can be controlled from the reservoir, which in connection with the quickly switchable locking device and, if necessary, a targeted control of the Suction device provided vacuum allows a targeted and accurate adjustment of the chlorine content in the solution or suspension.
  • a targeted control of the Suction device provided vacuum allows a targeted and accurate adjustment of the chlorine content in the solution or suspension.
  • overdosing can be avoided and precipitation of lime in the solution or suspension can be prevented or at least reduced.
  • the air filter can remove harmful gases and/or unpleasant odors from the exhaust air or room air.
  • the air sucked in from the environment per unit of time can expediently be adjusted in order to achieve precise dosing of the amount of chlorine in the suspension. This can be achieved, for example, by adjusting the suction power of the suction device, variable air inlet openings and/or specific cross-sectional designs of suction lines or suction line sections and other flow-mechanical means.
  • the air filter can advantageously be designed as an activated carbon filter.
  • An activated charcoal filter has the peculiarity of binding chlorine gases and odorous substances to the activated charcoal of the filter. This allows the cleaned air to be returned to the room. There is no need for a separate air duct leading out of the room.
  • the blocking device is designed with NO logic (NO—normally open). I.e. the blocking device is open in the basic state and blocks when energized.
  • NO normally open
  • the blocking device is open in the basic state and blocks when energized.
  • a safety-critical overdosing of solids in the event of a fault can be avoided by means of a NOlogical blocking device.
  • the dosing and mixing system can advantageously include means for providing the chlorine-containing solution or suspension as required. Provision is to be understood as the preparation of the solution or suspension in the mixing container.
  • the means can include, for example, sensors for capturing a picture of the situation or water conveying devices.
  • the dosing and mixing system can advantageously include means for providing the room air treatment as required.
  • Room air treatment is indicated, for example, when a component of the ambient air (room air) of the dosing and mixing system exceeds a predetermined concentration:
  • the dosing and mixing system can have an air sensor for detecting at least one room air parameter.
  • the dosing and mixing system can expediently start room air treatment by activating the suction device and opening the blocking device (second operating mode), so that essentially no negative pressure is created to convey the free-flowing solids from the storage container into the mixing container. In this (second) operating mode, the sucked-in air is routed through the air filter and thereby cleaned, in particular freed from chlorine.
  • the air sensor can be designed as a Ch sensor, for example.
  • the dosing and mixing system can also have a mixing tank sensor for detecting at least one mixing tank parameter, e.g. a chlorine concentration of the suspension in the mixing tank, and depending on the detected mixing tank parameter, control and in particular start the conveying of the free-flowing solid from the storage tank into the mixing tank the suction device is activated and the blocking device is closed (first operating mode), so that there is essentially a sufficient negative pressure to convey the free-flowing solid from the storage container into the mixing container.
  • the blocking device is closed by activation.
  • the dosing and mixing system can be set up for the quasi-continuous provision (production) of a chlorine-containing solution or suspension.
  • Quasi-continuous provision is to be understood as meaning a needs-controlled preparation of the chlorine-containing solution or suspension in the mixing container, in which the mixing container is essentially never completely emptied during operation.
  • a residual volume of the chlorine-containing solution or suspension can be filled with fresh or swimming pool water up to a required level or above and the appropriate amount of free-flowing solid to achieve the desired concentration of the suspension can be pumped into the mixing tank.
  • the prepared solution or suspension is expediently fed into one or more swimming pools by means of a withdrawal device.
  • the removal device particularly advantageously comprises at least one Venturi nozzle.
  • the extraction device can comprise at least one peristaltic pump or another fluid conveying device.
  • the dosing and mixing system can sometimes also simultaneously feed a large number of different and/or differently sized swimming pools with a chlorine-containing suspension solution. This enables the delivery rate to be adjusted to the size of the swimming pool. If a large flow rate is required, the (majority of) Venturi nozzle(s) can be used, and peristaltic pumps can be used for lower dosing rates.
  • an air suction point of the dosing and mixing system via which the mixing container is connected to the suction device via a suction line, is arranged vertically elevated and horizontally offset relative to the material and/or external air supply. This can prevent or at least reduce unwanted suction of metered solids. Furthermore, the air flow can be advantageously directed in the mixing container via the elevated position of the air extraction point, so that the condensation water collecting on the ceiling of the mixing container can be discharged better.
  • the material inlet of the mixing container can be different from an air inlet of the mixing container, via which, for example, room air is conveyed into the mixing container when the blocking device is open.
  • the blocking device is not attached in or on the suction line.
  • the mixing container has a separate air inlet.
  • the air inlet can be designed free of the boundary conditions of the suction line, for example by the air inlet having a different diameter than the suction line or the diameter of the material inlet. This makes it possible, among other things, to minimize friction losses and/or to maximize volume throughputs in the second operating mode. Furthermore, the contact of the blocking device with the abrasively acting free-flowing solid can be avoided.
  • the material feed into the mixing container can be identical to the air feed when the blocking device is open.
  • the blocking device is arranged directly in or on the suction line.
  • the blocking device can be arranged at or just behind a geodetically highest point of the suction line, viewed in the conveying direction of the free-flowing solid. Compared to arranging the blocking device in front of the geodetically highest point, this has the advantage that warm, moist air rising from the mixing container via the material inlet (and possibly via the blocking device that is open when the dosing and mixing system is at rest) can continuously escape and does not accumulate in the storage container knocks down.
  • the blocking device can be arranged directly on the mixing container, in particular directly on the upper side of the mixing container. This enables a compact design of the dosing and mixing system with short signal and power lines. The positioning on the mixing tank is also acoustically advantageous, since flow and vibration-related noise can be minimized.
  • the blocking device can preferably be assigned to and spaced from the suction line via an air lock, with the air lock dividing the suction line into two sections which are assigned to one another in the air lock, eg via a socket-funnel arrangement.
  • An air lock is to be understood as meaning a pressure-tight space in which two partial sections of the suction line are fluidly connected to one another in an open manner, for example as a socket-funnel arrangement. Due to the physical distance between the blocking device and the suction line, direct contact between the blocking device and the conveyed solid can be avoided.
  • the locking device is therefore more robust and less susceptible to faults. Different cross sections of air and material accesses can also be realized through the air lock, the cross section for the external air inlet being expediently enlarged compared to a first suction line section.
  • the suction line can have a uniform or variable cross-section.
  • a first section of the suction line can expediently have a smaller cross-section and a second section can have a larger cross-section.
  • the blocking device can preferably be designed as a solenoid valve, in particular as a valve that can be actuated magnetically by a tie rod. Very short reaction times can be achieved with solenoid valves, so that a high dosing accuracy for the conveyed solid is possible.
  • other forms of the blocking device are also possible, such as a hydraulically, pneumatically or electromotively controlled blocking device.
  • the dosing and mixing system expediently has one or more level gauges.
  • the dosing and mixing system can include at least one non-contact level meter for measuring the level of the suspension or solution in the mixing container, in particular in the form of an ultrasonic sensor.
  • non-contact measuring principles are much more robust and less error-prone and enable continuous monitoring of the level, i.e. for each level from 0 to 100%
  • the dosing and mixing system can include a measuring device for detecting the amount of free-flowing solid removed from the storage container. With such a measuring device, exact dosing of the free-flowing solid and thus precise production of the desired suspension concentration is possible.
  • the measuring device can be designed, for example, as a load cell for measuring the weight of the free-flowing solid that is removed from the storage container or remains in it.
  • the measuring device can, for example, record the weight of the storage container and determine the amount of free-flowing substance removed by calculating the difference in the weight measurement.
  • volumetric measurement methods can also be used.
  • the measuring device can be arranged directly on the storage tank, in the suction line, at the material inlet of the mixing tank or elsewhere.
  • the measuring device is advantageously arranged directly on the storage container. This is next to the Determining the amount of free-flowing substance removed also enables the weight of the reservoir to be determined, so that if the reservoir weight is known, it can be determined when the solids in the reservoir are running low.
  • the measuring device can advantageously be coupled with a container changeover described further below.
  • the dosing and mixing system can advantageously include a vibration device to maintain the flowability of the free-flowing solid in the storage container.
  • a vibration device to maintain the flowability of the free-flowing solid in the storage container.
  • This can be designed, for example, as a vibration or knocking device, which can be driven in particular electrically, pneumatically or electropneumatically, and is activated periodically and/or at specific times, e.g. before and/or when the free-flowing solid is removed from the storage container Solids in the storage tank set in motion by vibrations or impulses. This can prevent the solids from clumping together and/or make it easier to suck in the solids in the first operating mode.
  • the vibration device can be designed in particular as an electric motor with an imbalance, which is attached to a receptacle of the storage container and additionally includes a freely oscillating knocking device.
  • both impulses (low frequency, high energy density) and vibrations (high frequency, low energy density) can be transmitted to the storage container or the solid with just one actuator.
  • the dosing and mixing system includes a suction lance that can be immersed in the reservoir and has a material intake opening at its immersible end for sucking in the free-flowing solid and an air intake opening axially spaced therefrom for sucking in air from the environment.
  • the suction lance comprising an inner tube and an outer tube, with the inner tube and the outer tube being arranged concentrically and radially spaced apart from one another and being displaceable relative to one another in the axial direction, and with the inner tube being used to suck in the free-flowing solids from the storage container and air is sucked in from the environment into the annular gap formed between the inner tube and the outer tube.
  • At least one air intake opening is expediently provided in the outer pipe, in particular in an upper section, and at least one through-opening in the inner pipe, in particular in a lower section, with air being sucked in from the environment through the air intake opening and flowing through the through-opening into the inner pipe can reach.
  • this ensures an even suction power and, on the other hand, enables the intake air to be deflected through the passage opening(s) into the inner tube.
  • the resulting air turbulence in the inner tube enables finely dosed suction of the solids and prevents the sucked solid particles from clogging the suction lance at the start of suction, especially when the suction device is tightened.
  • the positioning of the air intake opening on the suction lance makes it possible to dispense with air openings in possibly exchangeable storage containers.
  • the air intake opening is expediently designed to be variable, e.g. with a throttle slide partially covering the air intake opening.
  • the air intake port may also include an air filter to prevent or at least reduce entry of unwanted foreign matter.
  • the inner tube and the outer tube of the suction lance can preferably be designed to be displaceable relative to one another in the axial direction.
  • the inner and outer tubes thus form an annular air gap, so that if there is a negative pressure in the suction line, air is sucked in through the air intake opening and into the annular gap and is swirled around at the tip of the suction lance and sucked out again via the inner tube. Material on the tip of the suction lance can be carried away.
  • the air vortex conditions can be advantageously set by positioning the inner and outer tubes appropriately.
  • the amount of air sucked in from the environment per unit of time can be adjusted by changing the cross section of the air intake opening by axial displacement of the inner tube relative to the outer tube. This enables precise dosing of the suctioned solids into the mixing tank. With a higher amount of air sucked in, there is a finer (lower) intake behavior.
  • the suction lance is expediently movably mounted in or on the reservoir. As a result, automatic tracking of the suction lance, in particular as a result of negative pressure or gravity, is possible.
  • the amount of air sucked in from the environment per unit of time can also be advantageously adjusted by means that have not been described above.
  • a throttle element for adjusting the sucked-in Air volume and / or arranged to regulate the flow rate.
  • the throttle element can advantageously be designed as a ball valve.
  • the dosing and mixing system comprises at least two storage containers and an automatic container switchover, with the container switchover selecting a storage container from which free-flowing solid is conveyed into the mixing container.
  • the dosing and mixing system expediently has a mixing device for mixing the solution present in the mixing container.
  • the mixing device could be designed with one or more propellers of vertical or other design.
  • the mixing device is advantageously designed in such a way that it generates vertical turbulence with respect to the axis of rotation of the propeller(s) and as a result an approximately closed turbulence field is set in the solution or concentrate, which makes it particularly difficult for chlorine sludge to deposit on the bottom of the storage container becomes.
  • a direction of rotation of the mixing device can expediently be designed to be switchable.
  • the production process can be accelerated or the solubility of the chlorine-containing solid can be improved by a single or multiple change of direction.
  • the control device activates the suction device after opening the shut-off device or when the shut-off device for room air treatment is already open at specified intervals and for a specified period of time, with the control device opening the blocking device before activating the suction device .
  • a constant room air quality in particular without hazardous gases and without odor impairment, can be guaranteed. It can also be used to dehumidify storage and mixing containers.
  • Time-controlled air treatment also does not require room air sensors for detecting room air parameters, so that the method enables particularly cost-effective operation of the system.
  • the method according to the invention can provide intervals of 2 to 60 minutes, preferably 10 to 20 minutes, particularly preferably 12-15 minutes.
  • the method according to the invention can provide durations equal to 5 to 120 seconds, preferably 10 to 60 seconds and particularly preferably 10-30 seconds. Such intervals and durations allow the indoor air quality to be adjusted depending on the size of the room and the activity of the dosing and mixing system.
  • the dosing and mixing system has a room air sensor and the control device activates the suction device for room air treatment when the shut-off device is open if a value determined by the room air sensor exceeds an (upper) threshold value and is expediently deactivated , if the value determined by the room air sensor falls below a (lower) threshold value.
  • the solution or suspension is prepared in a mixing container 100, the preparation being carried out by mixing water supplied via a water inlet 90 and material supplied via a material inlet 60 in the form of a free-flowing solid, such as granular hypochlorite.
  • the mixing container is designed, for example, as a cylindrical container.
  • the material inlet 60 and the water inlet 90 are arranged at the top of the mixing container 100 in this exemplary embodiment.
  • the water inlet 90 in particular could also be arranged at a different point, for example near the bottom of the mixing container 100 .
  • the water inflow could be smoother, especially with less splash water formation.
  • the delivery rate for the water supply would have to be increased by the amount of the hydrostatic pressure forces in the mixing tank 100 .
  • the water is conveyed into the mixing container 100 via a fluid conveying device 9 designed here as a propulsion water pump.
  • a corresponding dosing of a desired amount of water can be done, for example, using a volumetric device located in the water supply line.
  • the amount of water can also be determined by measuring the current consumption or the rotational speed of the fluid conveying device.
  • the water supplied is determined by a non-contact level gauge 12 .
  • the level gauge 12 is designed here as an ultrasonic sensor and determines a distance between the level sensor and a water level or level of the mixing container 100. With a known mixing container geometry, conclusions can be drawn about the actual volume of the water in the mixing container 100.
  • the amount of water supplied can be determined comparatively precisely if the addition of water and the addition of material take place sequentially, i.e. one after the other.
  • the free-flowing solid is added via the material inlet 60 in this exemplary embodiment, with the amount of material added being recorded by measuring the weight difference in the weight of the storage container 1 .
  • the free-flowing solid is stored in the reservoir 1 . Way of promoting the solid is described in more detail below.
  • the difference in weight is measured using a measuring device 4 located on a receptacle of the storage container 1.
  • the measuring device is a capacitively operating load cell.
  • other measuring devices with other measuring principles could also be used.
  • the water and material are stirred together using a mixing device 10 designed here as an agitator.
  • the metered solid goes into solution and/or suspension.
  • the water and material could also be set in motion or circulated via a jet pump or another fluid conveying device for mixing and mixing in the mixing container.
  • the prepared solution or suspension is distributed as required via a removal device, not shown in detail, comprising one or more removal devices to corresponding sinks.
  • the sinks can be buffer stores for temporarily storing the solution or suspension.
  • several different solutions or suspensions which differ in terms of their chlorine content, for example, could be stored through a large number of temporary stores.
  • the sinks can also be one or more swimming pools, with different chlorination requirements and thus suspension or solution requirements depending on the pool volume, so that discharge devices adapted to the sinks are preferably connected to the dosing and mixing system. If there are several sinks (multi-circuit system), each sink can be provided with its own discharge device.
  • the dosing and mixing system detects the removal volume of the solution or suspension via the level gauge 12 so that the level gauge provides a signal which can be used to start a new production process for producing another chlorine-containing suspension solution.
  • the dosing and mixing system has a control device S, not shown in the figure, in which measurement signals from various internal or external sensors and actuators can converge.
  • the control device S can have means for automatically controlling the individual actuators.
  • the control device can also include a graphical or non-graphical user interface for the input of commands or the setting of automatic program sequences by a user.
  • the control device S can, for example, be connected wirelessly to a local or non-local network (LAN or WAN) and can be reached via the network (web application, server).
  • the control device S can have additional interfaces for one-way or two-way communication with other devices, eg a bus connection.
  • the dosing of the free-flowing solid is described below.
  • the solid is in a storage container 1 .
  • the storage container 1 can be a cylindrical delivery container, for example.
  • the reservoir 1 is placed in a receptacle of the dosing and mixing system. In the receptacle, the reservoir 1 can advantageously be positioned at an angle, so that the solid tends to a 'corner' of the reservoir due to the force of gravity. This makes emptying the residue easier.
  • the holder of the storage container 1 has the above-mentioned weighing cell 4 which records the current weight of the storage container 1 . This can be used in the above-mentioned manner to determine the amount of solid that has been metered in or removed. At the same time, the filling level of the reservoir can also be determined via the load cell 4, so that the control device S can send a maintenance signal to replace the reservoir 1 at a given time.
  • the dosing and mixing system could include a second storage container and an automatic container changeover (not shown), which switches over the conveyance of the solid from the first storage container to the second (full) storage container when the first storage container is running low.
  • Automatic container switching can be implemented, for example, by two receiving devices equipped with load cells for the two storage containers, two 2-way valves that can be switched over via the control device S, with each storage container having a suction lance that is connected to the suction line.
  • the receptacle of the storage container 1 expediently has a vibration device 5 with which the material or solid in the storage container 1 can be made to vibrate in order to achieve a uniform distribution of the solid in the storage container.
  • a suction lance 2 is immersed in the reservoir or its upper cover.
  • the suction lance 2 comprises an outer tube 2b and an inner tube 2a, which are arranged concentrically and radially spaced apart from one another and are arranged such that they can be displaced axially relative to one another.
  • Inner and outer tube 2a, 2b form an outer annular gap 21, which has a at the upper end Air intake port 3 is atmospherically connected.
  • the inner tube 2a forms a suction tube which is connected to the suction line 6 .
  • FIG 3 a preferred embodiment of the intake manifold 2 is shown in detail.
  • the lower end of the inner tube 2a has a material intake opening 20 .
  • the upper end of the inner tube 2a is connected to the suction line 6.
  • Ambient air is sucked into the inner tube 2a via the material intake opening 20 via the air inlet 3 and the annular gap 21 .
  • the material intake opening 20 can expediently be spaced apart in the axial direction from the end of the outer tube 2b. This can prevent the inner tube 2a from touching down directly on a bottom section of the storage container 1 and being able to attach itself by suction.
  • the outer tube 2b can advantageously have a crown-like end or a crown-like attachment in order to prevent the outer tube 2b from being sucked firmly to the bottom section of the storage container 1 .
  • the suction lance 2 in the figure 3 have lump breakers, not shown, at the tip of the suction lance 2 .
  • These can be formed, for example, as transverse webs in the inner tube 2a, in particular in the immediate vicinity of the material intake opening 20, and/or on the outer tube 2b.
  • a lump breaker helps break up clumped solid build-ups. This can reduce the risk of a suction line blockage.
  • the inner tube 2a of the suction lance 2 can also have one or more through-opening(s) 22, e.g. in the form of transverse bores or selective openings in the wall of the inner tube 2a, whereby a fluid connection from the interior of the inner tube 2a to the annular gap 21 is created.
  • the at least one passage opening 22 in the inner tube 2a allows air to flow through the inner tube 2a even if the material suction opening 20 of the suction lance 2 is blocked, whereby the air flow creates a negative pressure in the inner tube 2a and a continuous suction force is maintained. This allows any blockages that have arisen to be dissolved again.
  • the through-holes 22 a bring about advantageous turbulence of the air flow in the inner tube 2a or at the material suction opening 20.
  • the inner tube 2a can be displaced axially relative to the outer tube 2b.
  • a corresponding bearing can be designed in the form of projections on the outer tube 2b and/or on the inner tube 2a that bridge the annular gap 21 and function as plain bearings.
  • a fixing of the inner tube 2a to the outer tube 2b can be realized by the static friction adhering to the plain bearing.
  • separate locking mechanisms such as a locking screw can also be used.
  • the cross section of the air intake opening 3 of the suction lance 2 is expediently variable, so that the amount of air supplied per unit of time can be adjusted.
  • the size of the air intake opening 3 is adjusted by axial displacement of the inner tube 2a relative to the outer tube 2b.
  • the size of the air intake opening 3 is determined by the axial distance from the upper end of the outer tube 2b and a thickened portion 23 of the inner tube 2a. The smaller the axial distance between the thickening 23 and the upper end of the outer tube, the smaller the cross section of the air intake opening 3 and the smaller the amount of air conveyed through the annular gap 21 .
  • the thickening 23 is firmly connected to the inner tube 2a or formed on it.
  • the distance between the thickened portion 23 and the upper end of the outer tube 2b can be changed.
  • the cross section of the air intake opening 3 changes and, at the same time, the distance between the intake opening 20 and the lower end of the outer tube 2b changes.
  • the thickened portion 23 can also be attached to the inner tube 2a in a detachable or axially displaceable manner, for example by means of a clamping screw.
  • the cross section of the air intake opening 3 can be adjusted independently of the axial distance between the intake opening 20 and the lower end of the outer tube 2b.
  • the cross section of the air intake opening 3 can also be changed via a throttle valve, a throttle flap or a throttle slide arranged in the air intake opening 3 .
  • the or each air intake opening 3 can be designed invariably, for example as a radial bore in the outer tube.
  • an axial displacement of the inner tube 2a relative to the outer tube 2b is possible without changing the size/cross section of the air intake opening(s) 3 at the same time.
  • the inner tube 2a and the outer tube 2b are connected to one another via a connector part 24 .
  • the connector part 24 is firmly connected to the outer tube 2b and the inner tube 2a is mounted in the connector part 24 so that it can move axially.
  • the setting of the suction force and thus the amount of material conveyed per unit of time can be set very precisely.
  • the solid is conveyed from the storage container 1 via the suction lance 2, the suction line 6 and the material inlet 60 into the mixing container 100 by negative pressure.
  • the negative pressure is generated via a suction device 17 .
  • the suction device 17 has a suction turbine, for example, which is connected to the mixing container 100 via a suction line 14 .
  • a negative pressure is therefore generated in the mixing container 100 .
  • the negative pressure propagates into the storage container 1 via the material inlet 60, the suction line 6 and the inner tube 2a.
  • the suction device 17 can also be designed very generally as a vacuum device, and in particular as a side channel compressor.
  • Ambient air is sucked through the annular gap to the tip or material intake opening 20 of the suction lance 2 via the annular gap of the suction lance 2 atmospherically connected by the air intake opening 3 .
  • the air sucked in swirls the material located there and conveys the solid material thus fluidized via the inner tube 2a, which serves as a suction tube, into the suction line 6.
  • material is conveyed through the suction lance 2 as long as the suction device 17 is activated or negative pressure prevails and this negative pressure is also available in the suction lance 2 or the storage container 1 .
  • a material promotion can thus be interrupted in that either the suction device 17 is deactivated or the negative pressure in the reservoir 1 or the suction tube 2a is eliminated in some other way.
  • a blocking device 7 is provided for rapid interruption of the negative pressure in the suction line 6 and thus in the inner tube 2a of the suction lance 2 .
  • this blocking device 7 is arranged on the upper side of the mixing container 100 .
  • the blocking device 7 blocks the connection between the air inlet 80 of the mixing container 100 and the atmosphere or the ambient air.
  • the interior volume of the mixing container is atmospherically connected via the air inlet 80 . This leads to a stall in the suction line 6, as a result of which the negative pressure in the suction line 6 is also eliminated.
  • the conveyance or dosing of the material from the storage container 1 into the mixing container 100 is abruptly interrupted as a result.
  • the suction device 17 continues to be operated with the blocking device 7 open, (room) air is conveyed via the air inlet 80 through the mixing container into the suction line 14 .
  • the suction device 17 also has an air filter 15 for air conditioning.
  • the air filter 15 can be an activated carbon filter that is combined with a particle filter for filtering out suspended matter and aerosols.
  • both the air located in the inner container of the mixing container 100, in the storage container 1 and in the suction line 6 and the (room) air sucked in from the outside can be processed, ie cleaned of odors, gases and suspended matter.
  • the air filter is arranged in the flow of the suction device 17 here.
  • the air treatment by the filter 15 downstream of the suction device 17 for which purpose the air filter can also be placed outside and downstream of the suction device 17 .
  • An air treatment placed in the flow has the advantage that solid particles located in particular in the suction flow are held in the air filter and therefore cannot get into the suction device 17 . As a result, damage or wear and tear on the suction device 17 can be prevented or at least reduced.
  • the suction device 17 can be deactivated and the locking device 7 can be opened.
  • the suction device can also be deactivated immediately when the desired dosing amount of material is reached without a follow-up time
  • the metering and mixing system operated in this way can be used in the manner described above for conveying and metering material into the mixing container 100 (first operating mode).
  • the dosing and mixing system can also be used to prepare room air via the air filter 15 (second operating mode).
  • the blocking device 7 is opened before the suction device 17 is activated, so that air flows via the air inlet 80 through the mixing container 100 into the suction line 14 and the air filter 15 .
  • air treatment can also be achieved independently of material conveyance.
  • the air treatment can be operated as required, in particular periodically at intervals for a certain period of time.
  • the intervals can be shorter and/or the durations D longer if the suspension is processed frequently and/or if the dosing and mixing system's operating rooms are small. for example, the intervals I range from 2 to 60 minutes and the durations from 5 to 120 seconds.
  • the blocking device 7 is designed, for example, as a spring-loaded solenoid valve. Due to the short response times, a solenoid valve is suitable for fast activation and thus very precise regulation of the dosing capacity.
  • the blocking device 7 is designed to be NO-logical (normally open), i.e. it is always open in the idle state and is closed when power is supplied.
  • the inlet of the suction line 14, i.e. the air suction point 13, in this embodiment is advantageously positioned higher and offset to the side than the material inlet 60 and just as advantageously positioned higher and offset to the side than the air inlet 80.
  • the air turbulence occurs when the blocking device 7 is open or closed greater in the mixing container 100, which leads to better air exchange.
  • the blocking device 7 is closed, the unintentional suction of material into the suction line 14 can be avoided during material conveyance, since the elevated air suction point 13 no or at least less material is sucked into the suction line 14 and the material safely sinks into the mixing container 100 .
  • the blocking device 7 is not designed with a separate air inlet 80 on the mixing container 100 but is designed in or on the suction line 6 .
  • the blocking device 7 divides the suction line 6 into a first section 6a and a second section 6b.
  • the blocking device 7 can be placed at almost any point along the suction line 6 .
  • the air flow generated can remove condensed water not only from the mixing container 100, but also from the second section 6b during air treatment (second operating mode). Furthermore, the blocking device 7 can be spaced apart from the mixing container. As a result, the blocking device 7 is not exposed to any spray water and is less exposed to moisture from the interior of the mixing container 100 .
  • the blocking device 7 is also only indirectly connected to the suction line 6 via an air lock 70 .
  • the air lock 70 divides the suction line 6 into a first section 6a and a second section 6b.
  • the first section 6a and the second section 6b of the suction line 6 are openly fluidically connected to one another, here in the form of a nozzle-funnel arrangement 71.
  • an atmospheric connection can be established between the Air lock 70 and the environment are produced and thereby a stall in the first section 6a of the suction line 6 are caused.
  • the air from the environment is sucked into the mixing container 100 via the air lock 70 via the second section 6b and the air inlet 80 and removed again via the suction line 14 and the air filter 15 .
  • the locking device 7 essentially no longer comes into contact with the conveyed material through the air lock 70 .
  • the cross section of the air inlet 80 can also be chosen independently of the cross section of the suction line 6 .
  • the blocking device 7 can expediently be arranged at a highest point of the housing of the air lock 70 . This allows warm, moist air to escape from the system when the shutoff device is open.
  • air inlet 80 and material inlet 60 are identical.
  • the material inlet 60 is also cleaned during the air treatment without material conveyance, so that the suction line 6 or material inlet is cleaned of humidity or condensation and clogging or clogging of the material inlet with deposits can be prevented or at least reduced.
  • the nozzle-funnel arrangement 71 is arranged vertically in this exemplary embodiment. As a result, misdirection of the free-flowing solid can be avoided or at least reduced.
  • the dosing and mixing system designed in this way can also reduce a vacuum volume to be set under vacuum for the conveying of material, the housing of the mixing container 100 can be made more stable and the suction power of the suction device 17 can thus be reduced.
  • the air lock 71 is arranged downstream behind a highest point P of the suction pipe. In the absence of vacuum, material upstream of point P falls back into the hopper 1 while material downstream of point P falls into the mixing vessel 100 via the nozzle-hopper assembly 72 .
  • the blocking device 7 is closed accordingly, so that when the suction device 17 is activated, the solid falls over the connection piece of the first section 6a into the second section 6b and is transported into the mixing container 100 .

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Fertilizers (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Claims (15)

  1. Système de dosage et de mélange pour la fabrication d'une solution ou suspension contenant du chlore à partir de solide contenant du chlore, coulant, comprenant un récipient de mélange (100) avec une alimentation d'eau (90) et une alimentation de matériau (60) pour le solide coulant, un récipient de stockage (1) conservant le solide coulant, une conduite d'aspiration (6) reliant le récipient de mélange et le récipient de stockage (1), un dispositif d'aspiration (17) se fixant sur le récipient de mélange pour la génération d'une pression d'aspiration pour le transport du solide coulant dans le récipient de mélange (100) et un dispositif de blocage (7) pour la liaison sélective du récipient de mélange (100) avec l'air ambiant pour l'interruption du transport du solide coulant dans le récipient de mélange (100), ainsi qu'un dispositif de commande (S) pour la commande du dispositif d'aspiration (17) et du dispositif de blocage (7),
    dans lequel le dispositif d'aspiration (17) peut aspirer de l'air depuis l'environnement, par lequel l'aspiration du solide coulant peut être commandée depuis le récipient de stockage (1),
    caractérisé en ce
    qu'un filtre d'air (15) est associé en amont ou en aval au dispositif d'aspiration (17) de sorte que l'air aspiré par le dispositif d'aspiration puisse être filtré et libéré en particulier des constituants du chlore, et
    que le dispositif de commande (S) est conçu pour la commande du dispositif d'aspiration (17) et du dispositif de blocage (7) dans un premier mode de fonctionnement pour le transport du solide coulant en cas de dispositif de blocage (7) fermé et un second mode de fonctionnement pour la préparation de l'air ambiant et de l'air de récipient en cas de dispositif de blocage (7) ouvert, dans lequel le premier mode de fonctionnement peut s'effectuer indépendamment du second mode de fonctionnement.
  2. Système de dosage et de mélange selon la revendication 1, caractérisé en ce que le récipient de mélange présente une alimentation d'air (80) dans le récipient de mélange (100) et que l'alimentation de matériau (60) dans le récipient de mélange (100) est identique à l'alimentation d'air (80).
  3. Système de dosage et de mélange selon la revendication 1 ou 2, caractérisé en ce que le dispositif de blocage (7) est agencé vu dans le sens de transport du solide coulant derrière un point de renversement (P) le plus haut de la conduite d'aspiration (6).
  4. Système de dosage et de mélange selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de blocage (7) est associé par le biais d'un sas à air (70) à la conduite d'aspiration (6) et est agencé à distance de la conduite d'aspiration (6), dans lequel le sas à air (70) sépare la conduite d'aspiration (6) en deux sections partielles (6a, 6b).
  5. Système de dosage et de mélange selon la revendication 4, caractérisé en ce que les sections partielles (6a, 6b) de la conduite d'aspiration (6) dans le sas à air (70) sont associées l'une à l'autre par le biais d'un agencement tubulure-entonnoir (71), dans lequel l'une section partielle de la conduite d'aspiration présente une tubulure et l'autre section partielle comporte un entonnoir qui est agencé en dessous de la tubulure et à distance de celle-ci.
  6. Système de dosage et de mélange selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de blocage (7) est réalisé en tant que soupape commutable, en particulier en tant que soupape actionnable magnétiquement par un tirant d'ancrage.
  7. Système de dosage et de mélange selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de dosage et de mélange contient un logement, dans lequel le récipient de stockage (1) est réglable en particulier en biais, dans lequel le logement est de préférence couplé à un dispositif de vibration (5).
  8. Système de dosage et de mélange selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de dosage et de mélange comporte une lance d'aspiration (2) pouvant être plongée dans le récipient de stockage (1) qui présente à son extrémité pouvant plonger une ouverture d'aspiration de matériau (20) pour l'aspiration du solide coulant ainsi qu'à distance axiale de celle-ci une ouverture d'aspiration d'air (3) pour l'aspiration d'air depuis l'environnement.
  9. Système de dosage et de mélange selon la revendication 8, caractérisé en ce que la lance d'aspiration (2) comporte un tube intérieur (2a) et un tube extérieur (2b), dans lequel le tube intérieur (2a) et le tube extérieur (2b) sont agencés de manière concentrique et à distance radiale l'un de l'autre ainsi que de manière mobile dans le sens axial l'un contre l'autre et dans lequel le tube intérieur (2a) sert à l'aspiration du solide coulant du récipient de stockage (1) et de l'air est aspiré dans la fente annulaire (21) se réalisant entre le tube intérieur (2a) et le tube extérieur (2b) depuis l'environnement.
  10. Système de dosage et de mélange selon la revendication 8 ou 9, caractérisé en ce que dans le tube extérieur (2b), en particulier dans une section supérieure, au moins une ouverture d'aspiration d'air (3) est pratiquée et dans le tube intérieur (2a), en particulier dans une section inférieure, au moins une ouverture débouchante (22) est pratiquée, dans lequel de l'air est aspiré par l'ouverture d'aspiration d'air (3) depuis l'environnement, lequel peut parvenir par l'ouverture débouchante (22) dans le tube intérieur (2a).
  11. Système de dosage et de mélange selon l'une quelconque des revendications précédentes, dans lequel la quantité d'air aspirée par unité de temps depuis l'environnement est réglable, en particulier avec un organe d'étranglement agencé dans une conduite d'aspiration (14) entre le récipient de mélange (100) et le dispositif d'aspiration (17).
  12. Système de dosage et de mélange selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de dosage et de mélange comporte au moins deux récipients de stockage et une commutation d'emballage, dans lequel le récipient de stockage est commandé par la commutation d'emballage, duquel du solide coulant est transporté dans le récipient de mélange.
  13. Système de dosage et de mélange selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de dosage et de mélange présente un capteur d'air ambiant.
  14. Procédé de fonctionnement d'un système de dosage et de mélange selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de blocage (7) est ouvert ou s'est ouvert avant que le dispositif de commande (S) n'active le dispositif d'aspiration (17) en cas de dispositif de blocage (7) ouvert pour la préparation de l'air ambiant et de l'air de récipient dans des intervalles prédéfinis et pour une durée prédéfinie.
  15. Procédé selon la revendication 14, caractérisé en ce que la longueur des intervalles prédéfinis est comprise entre 2 et 60 minutes, en particulier 10 et 20 minutes et la durée prédéfinie est comprise entre 5 et 120 secondes, de préférence 10 et 30 secondes.
EP21163324.3A 2020-03-25 2021-03-18 Système de dosage et de mélange destiné à la production d'une solution ou d'une suspension contenant du chlore à partir d'un solide coulant contenant du chlore, et procédé pour l'operation du système de dosage et de mélange Active EP3892364B8 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
HRP20230898TT HRP20230898T1 (hr) 2020-03-25 2021-03-18 Sustav za doziranje i miješanje za proizvodnju otopine ili suspenzije koja sadrži klor iz slobodno protočne krutine koja sadrži klor te postupak upravljanja sustavom za doziranje i miješanje

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020108167.7A DE102020108167B4 (de) 2020-03-25 2020-03-25 Dosier- und Mischanlage zur Herstellung einer chlorhaltigen Lösung oder Suspension aus einem chlorhaltigen, rieselfähigen Feststoff und Verfahren zum Betrieb der Dosier- und Mischanlage

Publications (4)

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EP3892364A1 EP3892364A1 (fr) 2021-10-13
EP3892364B1 true EP3892364B1 (fr) 2023-06-07
EP3892364C0 EP3892364C0 (fr) 2023-06-07
EP3892364B8 EP3892364B8 (fr) 2023-08-09

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EP (1) EP3892364B8 (fr)
DE (1) DE102020108167B4 (fr)
ES (1) ES2953327T3 (fr)
HR (1) HRP20230898T1 (fr)
PL (1) PL3892364T3 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE645960A (fr) * 1963-04-02
US3561733A (en) * 1968-07-30 1971-02-09 Westvaco Corp Vacuum slurry system
DE3127218A1 (de) 1981-07-10 1983-01-27 Bayer Ag Verfahren und vorrichtung zum einmischen von pulverfoermigen bis kleinteiligen zusatzstoffen in eine fluessige reaktionskomponente
US20140269153A1 (en) 2013-03-15 2014-09-18 NKD Technologies, LLC Chemical solution mixing and dispensing apparatus
DE202018100285U1 (de) 2018-01-18 2018-08-22 Dirk Kuper Anordnung zum Dosieren eines Wasserzusatzstoffs für die Wasseraufbereitung eines Schwimmbads

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EP3892364A1 (fr) 2021-10-13
EP3892364B8 (fr) 2023-08-09
ES2953327T3 (es) 2023-11-10
EP3892364C0 (fr) 2023-06-07
DE102020108167B4 (de) 2022-05-05
DE102020108167A1 (de) 2021-09-30
PL3892364T3 (pl) 2023-08-28
HRP20230898T1 (hr) 2024-03-01

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