EP2408546A1 - Dispositif de formation de revêtement présentant un fonctionnement fiable pour matériau pulvérulent - Google Patents

Dispositif de formation de revêtement présentant un fonctionnement fiable pour matériau pulvérulent

Info

Publication number
EP2408546A1
EP2408546A1 EP10709230A EP10709230A EP2408546A1 EP 2408546 A1 EP2408546 A1 EP 2408546A1 EP 10709230 A EP10709230 A EP 10709230A EP 10709230 A EP10709230 A EP 10709230A EP 2408546 A1 EP2408546 A1 EP 2408546A1
Authority
EP
European Patent Office
Prior art keywords
liquid additive
powdery material
nozzles
cleaning
delivery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10709230A
Other languages
German (de)
English (en)
Inventor
Heinz Meier
Christian Buerge
Beat Schnider
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.)
Sika Technology AG
Original Assignee
Sika Technology AG
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 Sika Technology AG filed Critical Sika Technology AG
Priority to EP10709230A priority Critical patent/EP2408546A1/fr
Publication of EP2408546A1 publication Critical patent/EP2408546A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/006—Coating of the granules without description of the process or the device by which the granules are obtained
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/18—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area using fluids, e.g. gas streams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles

Definitions

  • the invention relates to a device for treating, in particular coating, pulverulent material with at least one liquid additive.
  • the device comprises a conveying device, which contains at least one conveying line, through which the powdered material is conveyed, and at least one introduction device for introducing the liquid additive into the at least one conveying line according to the preamble of the first claim.
  • the invention relates to a method for treating pulverulent material with at least one liquid additive and to a use of a device for treating pulverulent material with at least one liquid additive according to the preambles of the further independent claims.
  • the material cement is usually obtained from cement clinker.
  • the cement clinker the precursor of the cement rotary kiln, ground to cement powder, then mixed with gypsum, which acts as a setting regulator, resulting in the mixing process, the final product cement.
  • the recovered cement is stored in silos after production.
  • the material cement is mixed with aggregates, chemical additives and water.
  • the addition of the additives should improve the properties of the concrete in chemical and / or physical terms.
  • the additives can influence the flow properties, the viscosity, the compression behavior and the setting behavior of the concrete.
  • liquid admixture itself, for example by precipitation thereof or by impurities contained therein, contamination of the introduction device and obstruction of the introduction of the liquid admixture may occur.
  • a reliable and controllable introduction of the liquid additives is important for a consistent quality of the final product.
  • the object of the present invention is therefore to ensure a controlled, reliable and constant treatment of the powdery material with liquid additive in a device of the type mentioned in the introduction.
  • the device 1 has at least one cleaning device 7 for cleaning the introduction device 6, and that the introduction device 6 comprises a supply line 8 and at least two nozzles 9, wherein in each case at least one nozzle 9, the liquid additive 3 in the Delivery line 5 and the powdery material 2 can be inserted.
  • the advantages of the invention can be seen in the fact that the often arising inner 21 and outer 31 contaminants can be eliminated by the cleaning device 7 and / or them is prevented and thus a constant treatment of the powdery material 2 can be ensured with liquid additive 3.
  • the device comprises at least two nozzles 9, the reduction of the delivery rate of the liquid additive 2 can be compensated by contamination and / or cleaning a nozzle by another nozzle and thereby reliable treatment of the powdery material 2 with liquid additive 3 can be ensured ,
  • the device should therefore prevent and / or eliminate and / or compensate for a decrease in the delivery rate of the liquid admixture 2 due to contamination of the delivery device.
  • the cleaning device 7 permanently cleans the introduction device 6 at regular intervals or at regular intervals, whereby the formation of soiling can be prevented. Further expedient for the prevention of contamination is that the device further protective devices 13 for the nozzles 9 in the conveying line 5 has.
  • At least one of the nozzles 9 is arranged to be movable into and out of the delivery line 5. This is, inter alia, the prevention of external contaminants 31 conducive, since thereby nozzles, in particular the outlet opening 16, are protected from the dust 20 of powdery material 2. Furthermore, nozzles outside the delivery line can thereby be cleaned by a cleaning device 7, which improves the cleaning environment. Next can thereby
  • Nozzles outside the delivery line are protected from dust.
  • At least two nozzles 9 of the introduction device 6 are arranged on a movable mold part 15. If a nozzle 9 is clogged and / or cleaned, the movable mold part 15 can be indexed by one position to the next nozzle. As a result, the dead time without promotion can be greatly reduced and the promotion of the liquid additive 3 remains guaranteed because there is the possibility of resorting to further nozzles of the movable molding.
  • Fig. 1 is a schematic representation of a
  • FIG. 2 a - b lateral views of possible movable moldings
  • 3 a - c are views of possible nozzles with protective device
  • 4 a - b are views of a possible nozzle with cleaning device and protective device
  • FIG. 5 view of a possible nozzle with a possible
  • Fig. 6 is a further schematic representation of a
  • Fig. 1 the schematic structure of a device 1 for treating, in particular coating, of powdered material 2 with at least one liquid additive 3 is shown.
  • the apparatus 1 comprises a conveying device 4 which contains at least one conveying line 5 through which the powdery material 2 is conveyed, and at least one introduction device 6 for introducing the liquid additive 3 into the at least one conveying line comprising the powdery material 2 at least one cleaning device 7 for cleaning the introduction device 6.
  • the introduction device 6 comprises a supply line 8 and at least two nozzles 9, wherein in each case at least one nozzle 9, the liquid additive 3 in the delivery line 5 and the pul verförmigen material 2 can be inserted.
  • “powdered material” is meant in this document a material which is obtained by breaking up a dry solid, for example by crushing, grinding, crushing or milling in mills, or by spray-drying.
  • the pulverulent materials 2 typically have a particle size of essentially 1 to 200 ⁇ m, preferably 3 to 30 ⁇ m and / or a Blaine fineness of 2000 to 8000 cm 2 / g, preferably 3000 to 6000 cm 2 / g.
  • powdery material 2 are non-hydraulic, hydraulic and latent hydraulic powder material of all kinds, preferably such, which is needed for the construction industry in large quantities.
  • all materials which are used for the production of concrete, mortar or gypsum, in particular cement particles are suitable in principle as powdery materials 2. It can also substances or additives, such as for example, silica, fly ash, light aggregate, slag, fiber materials, for example, organic such as polypropylene fibers, etc. or inorganic such as basalt, glass, etc. may be used.
  • the powdery material 2 preferably comprises at least one binder which is preferably selected from the group consisting of cement, mortar, gypsum, silica, fly ash, slag and blast furnace slag or a mixture thereof. Particularly preferably, the powdery material 2 is cement.
  • liquid admixture 3 are typically suitable substances which are atomized (aerosol) and / or droplets (drops) and / or vaporized (steam) can be and have a viscosity of 1-500 mPa * s.
  • the at least one liquid additive 3 is typically selected from the group consisting of dispersant, condenser, flow agent, retarder, accelerator, stabilizer, shrinkage reducer, air entraining agent and corrosion inhibitor or a mixture thereof. It is particularly advantageous as a liquid additive a
  • High performance concrete liquefier preferably the product ViscoCrete®
  • This high-performance concrete condenser reduces the water content of cement and improves the workability of the concrete.
  • the conveying device 4 which contains at least one conveying line 5, through which the powdery material 2 is conveyed, is typically a conveying device in the construction industry.
  • a conveyor device 4 is used, for example, for transporting the production of the powdery material 2 to an intermediate storage, such as an intermediate silo, to a mobile means of transport, such as a truck or railway wagon, or a repository.
  • the conveying of the pulverulent material 2 in a conveying line 5 is generally carried out by means of bucket elevators, conveyor belts, pneumatic or in so-called air conveyor troughs, also called “air slides.”
  • air conveyor troughs are commercially available, for example, from Mahr GmbH, Germany typically of rectangular steel tubes having a width of 10-100 cm and a height of 10-100 cm, the powdery material 2 has, during conveyance, therein a filling level of typically% by% of the area provided for the powdered material Material 2 in an air conveyor trough is based on the fluidization of the powdered material by air, as well as the inclination of the trough of 5 to 10 °, which together with the kinetic energy which brings the powdery material in entering the air conveyor trough, allows movement of the powdery material t.
  • the fluidization is done by flowing with air from below through the located on a perforated substrate powdery material, whereby the particles of the powdery material remain within the resulting fluidized bed in a continuous up and down movement and so to speak remain in limbo.
  • the separation of Fluidisierluft and the powdery material is carried out by a release fabric made of plastic or glass fibers, wherein the fluidizing air can pass through the tissue, the powdered material 2 to be delivered but not.
  • the delivery line 5 often prevail temperatures of up to 120 0 C, further forms above the powdery material 2 dust 20 of powdery material.
  • dust in the present document is understood to mean the unwanted disperse distributions of solids, in particular of pulverulent material 2, in gases produced by mechanical processes or by fluidization, in particular by transport in the conveying line 5, the solid substance being in the ambient air is dispersed within the conveying line 5
  • the delivery line 5 is an air conveyor trough.
  • the powdery material 2 becomes a constant
  • the introduction device 6 for introducing the liquid admixture 3 into the at least one delivery line 5 comprises a supply line 8 and at least two nozzles 9. Via at least one nozzle, the liquid admixture 3 can be introduced into the delivery line 5 and to the powdery material 2.
  • the liquid additive may, for example, be atomized and / or dropped and / or vaporized. Due to the different consistency, the coating thickness of the powdery material can be adjusted with the liquid additive.
  • the liquid additive 3 is typically conducted to the at least two nozzles 9 via the supply line 8 at a pressure of 1-15 bar, preferably 3-7 bar.
  • the pressure of the supply line is greater than or equal to, in particular greater than the nominal pressure of the nozzles.
  • the supply line 8 consists of a main supply line 81 and Sub-lines 82, which connect the main feed line 81 with the nozzles 9.
  • Suitable nozzles 9 allow, inter alia, the spraying of liquid additive 3 at pressures of 1 to 30 bar, preferably 3 to 7 bar.
  • these are flat jet nozzles, mist nozzles or two-component nozzles, in particular flat-jet nozzles.
  • Fog nozzles are advantageous in that they can atomize pressurized liquids into very fine droplets with a large specific surface area.
  • Two-substance nozzles are characterized by a very fine atomization by the mixing of liquids with air or gas. Further, they can produce various spray patterns, such as flat jet, hollow cone or full cone spray patterns.
  • Flat jet nozzles are characterized by a uniform liquid and pressure distribution. Furthermore, they allow a great variability in the choice of the spray angle. Particularly suitable nozzles have a spray angle of 30 ° - 120 °. Depending on the design of the outlet opening 16 of the nozzle, an elliptical or rectangular impact surface is possible.
  • Flat jet nozzles are inexpensive and allow by a defined and easily adjustable impact surface the targeted treatment of the powdery material 2 with the liquid additive 3.
  • the at least two nozzles have one
  • the nozzles 9 are typically arranged on the conveying line 5 in such a way that the liquid additive 3 can be brought into contact as evenly as possible with the largest possible part of the powdery material 2.
  • the nozzles are arranged on the powder material 2 opposite wall of the delivery line. It is also advantageous if the nozzles, in particular the outlet opening 16, in the conveying line 5 have the largest possible distance to the powdery material 2. On the one hand, this allows a greater flexibility in the treatment with the liquid additive 3, on the other hand, the nozzles are less exposed to the dust 20 of the powdery material 2, whereby the possibility of external contamination 31 of the nozzles is reduced.
  • the distance between the outlet opening 16 of the nozzle 9 and the powdery material 2 is typically dependent on the filling level of the powdery material 2, the shape of the cross section of the conveying line and the spraying angle of the nozzle.
  • nozzles 9 are arranged to be movable into and out of the delivery line 5.
  • nozzles in particular the outlet opening 16 can be protected from the dust 20 of the powdery material 2.
  • nozzles outside of the delivery line 5 can be cleaned by a cleaning device 7, which improves the cleaning environment.
  • additional nozzles may be introduced into the delivery line 5 or nozzles removed therefrom. Unused nozzles can be protected so outside of the delivery line from the dust 20 of powdery material 2.
  • the movement of the at least one nozzle into the delivery line 5 in or out is regulated by a control system 11.
  • the introduction device 6 comprises at least three nozzles. It is also advantageous if at least two nozzles 9 of the introduction device 6 are arranged on a movable mold part 15, wherein the movable mold part 15 is preferably round, oval or angular.
  • the movable mold part 15 is typically a flat profile or a disk on which a plurality of nozzles 9 are mounted, as shown in Figures 2a and 2b.
  • the movable mold part 15 is typically at the delivery line
  • nozzles which promote no liquid additive 3, are protected from the dust 20 of powdery material.
  • This can for example be achieved in that the movable mold part is attached to the outside of the delivery line and those nozzles, which liquid
  • Delivery line to be moved and liquid additive 3 spray on the powdery material 2, while the nozzles, which promote no liquid additive, outside of the conveying line 5 are. It is also possible that the movable molding on the inside of the
  • Delivery line is attached and a protective device 13, typically a cover, those nozzles, which promote no liquid additive protects.
  • the movable molding 15 can be indexed by one position to the next nozzle. This allows the dead time without
  • the indexing by a control system 11 is adjustable.
  • Another advantage of the movable mold part 15 is that in the case of a blockage of a nozzle, the promotion of the liquid additive 3 is ensured, since there is the possibility of recourse to other nozzles of the movable molding.
  • the nozzles 9 can also be worked directly into the movable molding 15. This construction method would bring significant cost savings bring and would have advantages in sealing the nozzles to prevent the escape of liquid additive 3 from the nozzles during the change from one to the next nozzle.
  • the device 1 has several, in particular three or more, movable mold parts 15.
  • the feed line 8 before each movable mold part a valve 27 and / or a means 25 for determining the flow rate FI üse D of the liquid additive 3 from the conveying nozzle of the movable mold 15.
  • a valve 27 and / or a means 25 for determining the flow rate FI D üse allows for example the detection of a contamination of the conveying nozzle, after, for example, an indexing and / or cleaning the soiled nozzle, for example, if necessary can be initiated.
  • At least one of the nozzles 9 of the device 1 mentioned above may have a protective device 13, wherein the protective device 13 is arranged in the conveying line 5.
  • This protective device serves, in particular, to protect the nozzle, in particular the outlet opening 16, from the powder 20 of powdery material 2.
  • the protection device 13 is typically a cover or air curtain 14, in particular an air curtain.
  • the protective device 13 can be regulated by a control system 11.
  • a cover shields a nozzle, in particular the outlet opening
  • An air curtain 14 may partially surround or completely surround a nozzle 9, in particular the outlet opening 16, as shown for example in FIG. 4b. Further, the air curtain 14 may be substantially parallel, such as in Figure 3c, concentric, such as in Figure 3a, conical, such as in Figure 3b, or orthogonal, as for example in Figure 4b, be arranged to the axis of the discharge direction of the liquid additive 3 from the nozzle.
  • Figure 4a shows, inter alia, the inner part of a nozzle 9 with the
  • Nozzle bore 161 and the inner part of the outlet opening 16 are bores of the blower 141 of the
  • the outlet opening 16 is visible.
  • Blower 141 becomes substantially orthogonal to the axis of
  • FIG. 3a shows a blow-out device 141 which has an air curtain
  • FIG. 3b shows a blow-out device 141 which has an air curtain
  • FIG. 3c shows a blow-out device 141, which forms an air curtain with its axis substantially parallel to the axis of the outlet direction of the liquid additive 3 and is arranged in the transport direction of the powdery material 2 in front of the nozzle.
  • An air curtain 14 exits the blower 141 at a pressure of typically 0.1-1 bar.
  • the device 1 has at least one cleaning device 7 for
  • the cleaning device 7 can be arranged further inside or outside the delivery line 5
  • Such means 12 can be used for cleaning the supply line 8 and / or the nozzles 9.
  • Typical contaminants are internal contaminants 21 and external contaminants 31.
  • internal contamination 21 means contaminants which are located in the supply line 8 or within the nozzle 9, typically in the nozzle bore 161. Internal contaminants 21 are mainly due to contamination in the liquid additive 3 or by unusual liquid additive. Such internal contaminants can clog the main supply line 81 and thus interfere with the inflow to all the nozzles that clog the secondary supply lines 82 or the nozzles 9 themselves inside. Under external pollution 31 are in the present document
  • Pollutions understood which are at the outer part of the nozzle, in particular at the outlet opening 16, which comes into contact with the dust 20 of powdery material 2.
  • Such external contaminants 31 are typically caused by dust deposits and in particular by accumulations, typically drops, of liquid additive at the nozzle, which cause the dust 20 within a short time to clumps that can clog the nozzle externally.
  • FIGS. 4a and 4b show, inter alia, a nozzle 9, next to which a cleaning device 7 is arranged.
  • the compressed air 17 is supplied and exits through the compressed air outlet opening 23, wherein the compressed air 17 is passed to the outlet opening 16 in order to clean them from external contaminants 31.
  • This cleaning by means of compressed air 17 can take place both inside and outside the delivery line 5.
  • the means 12 can furthermore be a means for mechanical cleaning, for example ultrasound or a brush, as shown in FIG. 5, which can be arranged inside or outside the conveying line 5.
  • the agent 12 may also be water, detergents,
  • Solvent or mixtures act.
  • the nozzle in particular the outlet opening 16 and / or the nozzle bore 161, outside the delivery line by water, detergents, solvents or Mixtures thereof are cleaned, which eliminate internal 21 and external 31 soils.
  • Determining the flow rate FI PM of the powdery material 2 for example, a flow meter for powdered media having.
  • the apparatus 1 can furthermore have at least one control system 11 which has the flow rate FI F z of the liquid additive 3 and / or the delivery pressure P F z of the liquid admixture and / or the flow rate FI PM of the powdery material 2 as the measured variable.
  • the at least one control system 11 as the measured variable to the delivery pressure P F z of the liquid additive. It is particularly useful if the at least one
  • Control system 11 as a controlled variable at least one nozzle 9 switch on or off and / or can turn on or off as a controlled variable at least one cleaning device.
  • An increase in the delivery pressure P F z indicates either a blockage in the introduction device 6 or an increase in the flow rate FI FZ due to an increase in the flow rate FI PM of the powdery material 2.
  • the control system 11 as a measured variable to the delivery pressure P F z of the liquid additive.
  • a further nozzle 9 can be switched on when reaching a defined upper delivery pressure P FZ O compared to normal or optimum operation as a control variable (cascade), whereupon the delivery pressure P F z thanks to larger outlet area falls back into the normal value range P F zo P t and the spray pattern remains in a safe area.
  • a cleaning device 7 are switched on, whereupon the delivery pressure P F z thanks to the removal of contamination in the event of internal or external pollution back to the normal value range P.
  • F zo P t falls behind.
  • the conveying of liquid additive within a normal value range P FZ o p t is advantageous in that the nozzles, in particular if they are flat jet nozzles, have a pressure range or flow range in which an optimum spray pattern is ensured. Outside the areas mentioned, contamination of the delivery device or the nozzles may occur, for example, or local supersaturation with liquid additive 3 in the delivery line 5. This would not be beneficial for a controllable introduction of liquid additive and a homogeneous distribution of the liquid additive onto the powdery material ,
  • the determination of the flow rate FI PM of the pulverulent material 2 can be carried out empirically or technically, for example by means of a flow meter for pulverulent media.
  • the mass ratio of added liquid additive 3 to powdery material 2 is typically 1:10 - 1: 1000, in particular from 1: 100 - 1: 500.
  • the control system 11 can therefore, as previously mentioned, also use the cleaning devices 7 and / or the use of the protective devices 13 as control variables. It is particularly advantageous if the control system 11 uses as control variables the mentioned devices as well as the supply, respectively the switching off of nozzles 9.
  • FIG. 6 shows an introduction device 6 and a cleaning device 7, which uses compressed air 17 as means 12.
  • the introduction device 6 comprises a supply line 8 consisting of a main supply line 81 and secondary supply lines 82 and nozzles 9.
  • FIG. 6 shows means for determining the flow rate FI F z 24 of the liquid additive 3, the delivery pressure P FZ 26 of the liquid additive, the flow rate FI PM 32 of the powdery material 2, and the flow rates FI nozzle 25.
  • the means 25 is typically a simple flow sensor as previously mentioned.
  • the bypasses 82 further include a valve 27, typically a manually operable valve, and a 1 way valve 28.
  • the cleaning device 7 has compressed air lines 30, which have 1-way valves 29 and can bring in the region of the secondary feed line 82 between the nozzle and 1-way valves 28 compressed air.
  • the control system can on the one hand connect an additional nozzle to the desired delivery pressure
  • the affected secondary supply line 82 can be closed by closing the 1-way valve 28 and by opening the corresponding 1-way valves 29 compressed air 17 in the clogged secondary supply line
  • the invention comprises a method for treating, in particular coating, powdery material 2 with at least one liquid additive 3, wherein the liquid additive 3 is brought into contact with the powdery material 2 via a previously described device 1.
  • the method comprises the steps: a. Conveying a powdery material 2 through a
  • the method additionally comprises the following step: c. Determining the flow rate FI PM of the powdery material 2 and / or determining at least one delivery parameter FP FZ of the liquid additive 3, wherein FP FZ the two parameters flow rate FI F z of the liquid additive 3 and delivery pressure P F z of the liquid additive 3 comprises.
  • the step comprises determining the flow rate FI PM of the powdery material 2, determining the flow rate FI F z of the liquid additive 3 and determining the delivery pressure P F z of the liquid additive 3.
  • the method additionally comprises at least one of the following steps: d. Cleaning of parts or the entire introduction device 6 by the cleaning device 7, if at least one delivery parameter FP FZ of the liquid additive 3 a
  • Limit value FP FZ min falls below or exceeds a limit FP FZ ma ⁇ , in particular if the delivery pressure P FZ of the liquid additive 3 exceeds a limit P FZ ma ⁇ and / or e. Cleaning of parts or the entire introduction device 6 by the cleaning device 7 at regular intervals.
  • the method additionally comprises at least one of the following steps: f. Arranging a further nozzle 9 in the delivery line 5, if at least one delivery parameter FP FZ of the liquid additive 3 falls below a limit FP FZ min or exceeds a limit FP FZ ma ⁇ , especially if the delivery pressure P FZ of the liquid additive 3 a limit P FZ max exceeds and / or g.
  • the method additionally comprises at least one of the following steps: h. Measuring the flow rate FI D üse the at least one nozzle 9, via which the liquid additive 3 is sprayed onto the powdery material 2; and i. Arranging the nozzle 9 outside the delivery line 5 and / or
  • the method additionally comprises the following steps: j. Measuring the delivery pressure P FZ of the liquid additive 3; and k. Disable the promotion of the liquid additive 3 at
  • the invention comprises the use of a device 1, as described above, for treating, in particular coating, powdery material 2 with at least one liquid additive 3.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne un dispositif (1) conçu pour former un revêtement comportant un matériau pulvérulent (2) et au moins un additif liquide (3). Ce dispositif (1) comprend un dispositif de transport (4) qui comporte une ligne de transport (5) servant à transporter le matériau pulvérulent (2), ainsi qu'un dispositif d'introduction (6) destiné à introduire l'additif liquide (3) sur la ligne de transport (5) comprenant le matériau pulvérulent (2), et comporte en outre un dispositif de nettoyage (7) destiné à nettoyer le dispositif d'introduction (6). Ce dispositif d'introduction (6) comprend une conduite d'alimentation (8) et au moins deux ajutages (9), l'additif liquide (3) pouvant être introduit sur la ligne de transport (5) et ajouté au matériau pulvérulent (2), respectivement par l'intermédiaire d'au moins un ajutage (9). Cette invention concerne également un procédé pour former un revêtement comportant un matériau pulvérulent (2) et au moins un additif liquide (3), ainsi que l'utilisation d'un dispositif (1) pour former un revêtement comportant un matériau pulvérulent (2) et au moins un additif liquide (3).
EP10709230A 2009-03-19 2010-03-19 Dispositif de formation de revêtement présentant un fonctionnement fiable pour matériau pulvérulent Withdrawn EP2408546A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10709230A EP2408546A1 (fr) 2009-03-19 2010-03-19 Dispositif de formation de revêtement présentant un fonctionnement fiable pour matériau pulvérulent

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09155600A EP2230005A1 (fr) 2009-03-19 2009-03-19 Dispositif de revêtement doté d'un fonctionnement sûr pour matériau poudreux
EP10709230A EP2408546A1 (fr) 2009-03-19 2010-03-19 Dispositif de formation de revêtement présentant un fonctionnement fiable pour matériau pulvérulent
PCT/EP2010/053583 WO2010106153A1 (fr) 2009-03-19 2010-03-19 Dispositif de formation de revêtement présentant un fonctionnement fiable pour matériau pulvérulent

Publications (1)

Publication Number Publication Date
EP2408546A1 true EP2408546A1 (fr) 2012-01-25

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP09155600A Withdrawn EP2230005A1 (fr) 2009-03-19 2009-03-19 Dispositif de revêtement doté d'un fonctionnement sûr pour matériau poudreux
EP10709230A Withdrawn EP2408546A1 (fr) 2009-03-19 2010-03-19 Dispositif de formation de revêtement présentant un fonctionnement fiable pour matériau pulvérulent

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09155600A Withdrawn EP2230005A1 (fr) 2009-03-19 2009-03-19 Dispositif de revêtement doté d'un fonctionnement sûr pour matériau poudreux

Country Status (6)

Country Link
US (1) US20120070565A1 (fr)
EP (2) EP2230005A1 (fr)
CN (1) CN102355944A (fr)
BR (1) BRPI1009414A2 (fr)
MX (1) MX2011009367A (fr)
WO (1) WO2010106153A1 (fr)

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DE102013003688A1 (de) * 2012-10-26 2014-04-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Kombinationsdüse sowie Vorrichtung für den Auftrag eines viskosen Materials auf eine Bauteilkante
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WO2010106153A1 (fr) 2010-09-23
EP2230005A1 (fr) 2010-09-22
CN102355944A (zh) 2012-02-15
MX2011009367A (es) 2011-10-10
BRPI1009414A2 (pt) 2016-03-01

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