WO2006060928A2 - Installation de formation de gouttes - Google Patents

Installation de formation de gouttes Download PDF

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Publication number
WO2006060928A2
WO2006060928A2 PCT/CH2005/000720 CH2005000720W WO2006060928A2 WO 2006060928 A2 WO2006060928 A2 WO 2006060928A2 CH 2005000720 W CH2005000720 W CH 2005000720W WO 2006060928 A2 WO2006060928 A2 WO 2006060928A2
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WO
WIPO (PCT)
Prior art keywords
drip
melt
nozzle
towers
nozzles
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.)
Ceased
Application number
PCT/CH2005/000720
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German (de)
English (en)
Other versions
WO2006060928A3 (fr
Inventor
Klaus Nothelfer
Theodor JÜRGENS
Andreas Christel
Brent Allan Culbert
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.)
Buehler AG
Original Assignee
Buehler 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 Buehler AG filed Critical Buehler AG
Publication of WO2006060928A2 publication Critical patent/WO2006060928A2/fr
Publication of WO2006060928A3 publication Critical patent/WO2006060928A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • 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
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • 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
    • B01J2/18—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic using a vibrating apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state

Definitions

  • a large number of polymers are today produced and processed on a large scale. Many polymers are obtained as polymer melts, which must be converted into a solid form for further use, processing, storage or transport. The production of granules has proven to be particularly suitable. Depending on the viscosity of the polymer melts, various granulation methods are used, whereby a dropping process is suitable, above all for low-viscosity polymer melts.
  • WO 03/054063 (Culbert, Christel.) Describes the dripping of a polymer melt through a drop section into a receiving region, in which the particles are fluidized and thus guided to an outlet opening, in order subsequently to be further treated.
  • the method described has the disadvantage that the diameter of the receiving region is coupled to the diameter of the drop zone, and that when multiple dropletizing devices are used, either a plurality of receiving regions or a very large common receiving region must be provided. Since the amount of gas required for turbulence is directly proportional to the diameter of the receiving area, correspondingly large quantities of gas must be supplied and led away again, which leads to an overall uneconomical operation.
  • WO 03/054063 always starts with the use of a dropletizing device. It is not described how to build up the supply of the melt and the removal of the particles in order to achieve a uniform product quality when using several dropletizing devices.
  • WO 01/81450 Moatthaei, Locker 10.1
  • WO 02/18113 Geier, Jürgens
  • WO 00/24809 Geier, Jürgens
  • the described methods have the disadvantage that, when using a plurality of dropletizing devices, either a plurality of drop sections or a very large common drop section must be made available. Since the required amount of gas is directly proportional to the diameter of the fall distance correspondingly large amounts of gas must be supplied and led away again, resulting in a total uneconomic operation.
  • a plant for the production of polymer particles which comprises:
  • the delivery lines are delivery pipes.
  • the delivery pipes have a diameter compared to the diameter of the drip towers in the ratio of less than 1: 2, in particular less than 1: 5.
  • the delivery lines are conveyor troughs.
  • vibrating elements can be attached to the conveyor troughs.
  • the advantage of using conveyor troughs is that the polymer particles can be transported distributed over a large area. Vibration can reduce the agglomeration of polymer particles. Also by means of conveyors a promotion to a higher level is possible.
  • An advantageous embodiment of the inventive system provides that the delivery lines, in particular the conveyor troughs are divided into several stages, which allows treatment of the polymer particles already in the delivery line, with the smallest possible residence time spectrum.
  • two or more delivery lines are combined in a further delivery line, whereby out of the advantage that the particles can be promoted by means of only one line to another process step.
  • two or more delivery lines are conveyed in an apparatus, such as e.g. a crystallizer, a sizing, a storage tank or a treatment vessel (reactor) merged.
  • an apparatus such as e.g. a crystallizer, a sizing, a storage tank or a treatment vessel (reactor) merged.
  • the drip nozzles are assigned to the upper area of the drip towers, the feed lines are assigned to the lower area of the drip towers and there are one or more openings for supplying a cooling medium.
  • a further preferred embodiment of the system according to the invention provides that the at least one melt line has markings which are connected to at least one or more dripping nozzles.
  • the melt line is connected at both ends with at least one reactor for melt production and connected via branches with two or more drip nozzles.
  • a likewise preferred embodiment of the system according to the invention provides that two or more melt lines connect the two or more drip nozzles to at least one of the melt production reactors. This results in the advantage that over each melt line a desired amount of polymer melt can be promoted without affecting the feed through the other melt lines.
  • melt pumps or melt filters are arranged between the drip nozzles and the at least one melt-producing reactor.
  • An embodiment of the system according to the invention provides that there are one or more openings for the removal of the cooling medium in the drip towers. These may preferably be provided with a device for utilizing or recovering the process energy stored in the cooling medium, e.g. a heat exchanger or a steam turbine to be connected.
  • a device for utilizing or recovering the process energy stored in the cooling medium e.g. a heat exchanger or a steam turbine to be connected.
  • the advantage here is the possibility to improve the energy efficiency of the entire system.
  • the drip nozzles each comprise a nozzle system, comprising at least one nozzle plate, at least one element spaced from the nozzle plate for vibration transmission and at least one opening into the gap melt feed opening.
  • a nozzle system comprises a nozzle package, comprising at least a nozzle pot, a nozzle plate, at least one element for vibration transmission and, between the nozzle plate and the element for vibration transmission, at least one melt supply opening.
  • a further embodiment of the system according to the invention provides that the at least one element for vibration transmission is connected to at least one vibration-transmitting element, the connection preferably being separable.
  • the at least one vibration-transmitting element is mounted movably relative to the nozzle system.
  • polymer particles are combined from the two or more delivery lines.
  • the process is particularly advantageous when the polymer melt is a polycondensate melt since, in particular, low-viscosity polycondensates are suitable for dripping and, owing to the possibility of crystallization in the dropping tower, there are energetic advantages.
  • the process is also advantageous if, for cooling the polymer melt, a liquid cooling medium is used, since large amounts of polymer melt can be cooled by the required heat of vaporization with a small amount of cooling medium.
  • a protective film of the cooling medium on the surface of the drip towers can prevent the adhesion of polymer melt.
  • Suitable polymers are polymers which are liquid or which can be liquefied by heating.
  • these are thermoplastic polymers, such as e.g. Polyolefins, polystyrene or polycondensates, such as polyester, polycarbonate or polyamide.
  • crosslinking polymers such as thermosets or elastomers, and also polymer / solvent mixtures.
  • Reactors for polymer melt production are well described in the art.
  • polymerization reactors are contemplated in which polymers are prepared in the liquid phase, e.g. Stirred tanks, cage reactors or disk reactors, or apparatus in which previously prepared polymers are melted, e.g. Extruder or kneader.
  • various parameters are regulated which have an influence on the quality of the polymer melt. For example, Pressure and temperature in the reactors, as well as the amount and composition of individual components supplied can be regulated.
  • the degree of polymerization is influenced by the prevailing negative pressure.
  • Nozzle systems are referred to as drip nozzles, from which a liquid, in particular a polymer melt, exits substantially downwards through a multiplicity of openings, forming a multiplicity of individual liquid droplets.
  • the nozzle or the liquid contained therein can be excited with a vibration.
  • the nozzle system consists at least of the components nozzle body, nozzle plate and element for vibration transmission.
  • the nozzle body encloses a space in which the polymer melt is introduced and through which the polymer melt is directed towards the nozzle plate.
  • the nozzle body has at least one opening for the supply of polymer melt. In order to achieve a uniform flow through the nozzle body, it is also possible to provide a plurality of openings for supplying the polymer melt.
  • the nozzle body may be of individual construction or integrated into a nozzle bar. Such nozzle bars are known, for example, in spinning technology, where they are referred to as spinning bars.
  • nozzle body is usually inserted from above (top loading) or from below (bottom loading) in the nozzle bar, but it is also conceivable to use a lateral insert.
  • the nozzle body may be formed as a nozzle pot, are incorporated or integrated into the other components of the nozzle system, from which a nozzle package is formed.
  • the nozzle plate and the feed opening for the polymer melt, but also melt filter and distributor plates can be incorporated or integrated into the nozzle pot.
  • the element for vibration transmission can also be installed or integrated in the nozzle pot.
  • the element for vibration above the nozzle plate and the opening for melt supply is located between these two elements.
  • the individual elements may e.g. be inserted, pressed, clamped or screwed, or be firmly connected to the nozzle body.
  • the installation of the elements in the nozzle pot can be done directly or indirectly by means of holding devices.
  • the nozzle body may be directly connected to one or more polymer melt supply conduits, or connected to at least one orifice in the nozzle beam through which the polymer melt is fed.
  • the nozzle body is preferably tempered, in particular heatable, wherein the temperature can be made directly in the nozzle body or indirectly from outside can take place.
  • the indirect temperature control can be done via the nozzle bar.
  • the installation of the nozzle bodies in the nozzle bars takes place e.g. analogous to the type known from spinning technology.
  • the nozzle plate has a plurality of holes through which the polymer melt exits.
  • the nozzle plate is substantially round, but may also be polygonal, in particular rectangular.
  • the nozzle holes are preferably arranged on one or more ring paths.
  • the individual holes are preferably round, but may also have other cross sections, e.g. oblong, oval, star-shaped.
  • Typical hole diameters are 0.1 mm to 5 mm, in particular 0.3 to 1 mm.
  • the hole length corresponds to the nozzle plate thickness, wherein the hole may initially have a larger diameter on the inlet side and narrows conically in a transition region to the outlet side, the actual capillary out.
  • the hole length is typically between 5mm and 100mm, more preferably between 10mm and 50mm.
  • the hole length is typically between 0.1 mm and 5 mm.
  • the hole edge can be sharp or rounded.
  • the capillary usually has an L: D ratio of 1: 1 to 1:10.
  • the nozzle plate may be individually connected to the nozzle body, or constitute a part of a nozzle package. In the case of an individual attachment, it is again conceivable to assemble from above (top loading), from below (bottom loading) or a lateral insertion. Construction and production of a nozzle plate are basically also known from spinning technology and can be largely transferred to a nozzle plate of a dropletizing plant.
  • the nozzle plate may be coated on the exit side, for example, to prevent adhesion of polymer components, or at least to simplify the cleaning. While the nozzle plate is usually made of metal, for example, a ceramic material can be used for coating.
  • the element for vibration transmission is eg a movable membrane.
  • the nozzle body It is connected to the nozzle body so that a melt outlet between the nozzle body and the element for vibration transmission is prevented.
  • This is done, for example, by a clamping ring in which the element is clamped for vibration transmission.
  • the element for vibration transmission can also be connected directly to the nozzle body.
  • sealing rings can be used.
  • the element for vibration transmission should be mounted substantially parallel to the nozzle plate. Other orientations, such as a conical course, but are also conceivable.
  • the vibration transmission element is connected to a vibrating element.
  • a rigid connection should be used to ensure the greatest possible power transmission.
  • An at least slightly flexible connection is used when damping between the vibration transmitting element and the vibrating element is to be achieved.
  • connection between the vibration transmitting element and the vibrating element is separable, e.g. To replace a nozzle body with the element for vibration transmission or a whole nozzle package without having to replace the vibration-transmitting element.
  • the vibration-transmitting element is movably mounted, so that when working on the nozzle body or nozzle package, e.g. can be cleared out of the way by moving, tilting or swiveling.
  • a high oscillation frequency For generating a large number of small particles, a high oscillation frequency must be generated. Typical frequencies are 50 to 5000 hertz, in particular from 200 to 1000 hertz.
  • the vibration excitation is carried out, for example, electromagnetically, piezoelectrically or by electrostriction.
  • a nozzle system may comprise a plurality of elements for vibration transmission and / or a plurality of vibration-transmitting elements.
  • piezoelectric crystals for vibration excitation, which allows an assignment of a vibrating element to a nozzle hole.
  • connection between the element for vibration transmission and the vibration-transmitting element can also be effected by a pipe or a hose, whereby the vibration transmission can be carried out hydraulically.
  • a further alternative is an arrangement in which the element for vibration transmission is connected directly to the vibrating element.
  • the vibrating element can also become part of a nozzle package.
  • a separable connection between the vibrating element and the associated energy source is advantageous.
  • the nozzle plate is formed as a movable membrane with through holes for the polymer melt.
  • the movable nozzle plate is for this purpose either connected directly to a vibration-transmitting element, or connected to a vibration transmission element, wherein the vibration transmission element is then connected to a vibration-transmitting element
  • the drip towers may for example consist of a self-supporting, vertical tube or a suspended, flexible hose. They can be provided with an insulation layer and / or a tempered jacket. According to the invention, two or more drip towers are arranged in parallel per reactor. Each drip tower is associated with at least one drip nozzle. However, it can also be assigned to a drip tower several drip nozzles.
  • the drip towers are depending on the required throughput and the prevailing process conditions 0.5m to 100m, especially 3m to 30m, high and have a diameter of 0.1 m to 10m, in particular 0.5m to 3m.
  • the drip towers may have one or more feed openings and Wegfarö Stamm.
  • cooling or heating media can be added through the supply openings or gas streams with which the fall rate or the temperature of the drops can be regulated.
  • Through the Wegtechnologyö Stamm be supplied media or emerging from the polymer droplets substances such as monomers, solvents or blowing agents, lead away from the drip towers.
  • Feed lines and discharge lines are usually located below the drip nozzles. If an arrangement provided above the drip nozzles, they must be sufficiently protected against the possible cooling effect of the media flowing past, which can be achieved for example by insulation or baffles.
  • the relative arrangement of the supply lines and * ⁇ • the Wegfar Harttechnischen is not fixed, but they must be arranged so that unnecessarily strong turbulences are avoided in the trickling tower.
  • the lines can only open from one side or radially distributed in the drip tower.
  • a supply line may be located above, below or opposite a discharge line, resulting in a DC, counter or cross flow. By tangential blowing a rotation can be generated.
  • the supply lines and / or removal lines of several drip towers can be summarized, the quantity distribution e.g. can be controlled by flaps or valves.
  • cooling or heating media appropriately tempered gases, such as nitrogen, air, CO 2 , water vapor or gas mixtures and liquids or gas / liquid mixtures can be used.
  • gases such as nitrogen, air, CO 2 , water vapor or gas mixtures and liquids or gas / liquid mixtures
  • evaporating liquids having a boiling point below the melt temperature of the polymer melt are suitable as serving. If an evaporating cooling liquid is used, with which the polymer particles are cooled to a temperature below their boiling point, then a proportion of cooling liquid must be expected, which emerges together with the polymer particles from the drip towers. It is also possible to allow cooling liquids to condense on the surface of the drip towers, whereby adhesion of polymer particles to the drip tower surface can be prevented. It may also be advantageous for starting up a dropletizing device to prevent a thermally damaged starting product from adhering to the walls of the drip towers, in particular at its conical outlet parts, by means of a liquid film.
  • polyester melt e.g. Water and / or ethylene glycol.
  • the energy stored in an exiting, reheated cooling medium is recovered by means of energy recovery, e.g. by means of a heat exchanger or a steam turbine, at least partially recovered. For this it may be necessary to further heat or densify the warmed cooling media.
  • a cleaning step such as e.g. a filtration, a condensation, a combustion, a washing or an adsorption, must be interposed.
  • the dripping device is a drip tower together with at least one associated drip nozzle and the associated supply and Wegfartechnischen for the polymer melt, cooling media, process gases and polymer particles called.
  • a dropletizing device may be, for example, devices for monitoring the conditions in the dropletizing device or the quality of the polymer particles produced, such as measuring instruments, sight glasses, lighting sources.
  • a source of illumination for example, is a stroboscope whose frequency is tuned to the frequency of the drops produced.
  • Melting lines connect the reactor for polymer melt production with the drip nozzles, wherein two or more drip nozzles are connected to a reactor.
  • the melt lines can optionally be tempered.
  • the melt lines can have openings through which additives can be introduced or further melts can be supplied.
  • the melt lines may contain active or passive mixing elements, such as static mixers.
  • one or more conveyors e.g. Gear pumps or screw presses, be arranged between the reactor and the drip nozzles.
  • one or more melt filters may be arranged between the reactor and the dripping nozzles.
  • This can e.g. be achieved by a star-shaped arrangement of the melt lines from the reactor to the drip nozzles.
  • the following arrangements can be used:
  • Another possibility offers a star-shaped division, from at least one leading away from the reactor main line, whereby also the star arrangements described above are preferred.
  • Another possibility is the construction of at least one loop, are fed by the two or more drip nozzles via branches.
  • the throughput through the ring line is at least twice, in particular at least three times, the sum of the throughputs through all the branch lines. Accordingly, the cross section of the loop should be greater, in particular twice as large as the sum of all cross sections of A perenniale Trentslek lines.
  • a separate control and shut-off is included.
  • a regulating and blocking device e.g. a melt conveying device (gear pump) or a control valve can be used.
  • Delivery lines are lines through which the solid polymer particles are led away from the drip towers.
  • Each drip tower is assigned at least one delivery line.
  • two or more delivery lines are brought together in each case.
  • two or more delivery lines are combined in another delivery line.
  • two or more delivery lines in an apparatus such as e.g. a crystallizer, a sizing sieve, a storage tank or a treatment tank (reactor) * -. merged.
  • the treatment vessel may also be used to separate excess cooling medium from the polymer particles, e.g. can be done by means of an impact dryer, a centrifugal dryer, a perforated plate or sieve or thermally.
  • the delivery lines may be e.g. act around delivery pipes or conveyor troughs.
  • the delivery pipes have a diameter of 25mm to 2m, in particular 0.1m to 0.5m.
  • the diameter of the delivery pipes is at least smaller than 1/2, in particular smaller than 1/5 of the diameter of the associated drip towers.
  • the diameter of the delivery pipes can be changed over the length of the delivery pipe, in particular reduced. If a plurality of delivery pipes are brought together, the collection pipe can in turn have a larger diameter.
  • the polymer particles flow from the inlet opening to the outlet opening of the conveyor pipes, for example by an applied gradient, a flow of a pumped medium (conveying gas or liquid conveyed) or by a mechanical transport device, such as a screw conveyor, wherein a screw conveyor can be equipped with open or continuous auger wings. It can also be arranged several augers next to each other, with a tightly meshing or not tightly meshing arrangement is conceivable.
  • the conveyors are upwardly open or closed conduits, usually of rectangular cross-section, through which the product is e.g. is moved by an applied slope, by a mechanical transport device, such as a conveyor belt, or by vibration.
  • the conveyor troughs may have a smaller, equal or greater width than the diameter of the associated drip tower.
  • the delivery lines can be tempered, in particular heated.
  • the conveyor lines in particular the conveyor channels, can be subdivided into several stages, e.g. can be achieved in succession by means of built-in transverse elements to the flow direction or by the arrangement of several conveyor troughs.
  • the delivery lines may have holes through which, for example, excess cooling liquids, small particles (undersize), but not the specified polymer particles can escape.
  • a gas can be passed through the openings, which serves, for example, for drying and / or fluidizing the polymer particles.
  • the hole size is between 2/3 and 1/20 of the average particle size according to the polymer particle size, giving hole sizes of typically 0.05mm to 3mm.
  • the holes can also be designed in such a way that individual particles with size according to specification, but not agglomerates or oversized particles (oversize particles), can pass through.
  • the hole size is in accordance with the PoIy mer particle size between 1.1 and 3 of the average particle size, which results in hole sizes of typically 0.3 mm to 15 mm.
  • the delivery lines are connected by means of conical transition pieces with the drip towers.
  • the conical transition pieces may also have holes through which e.g. Excess cooling liquids or a treatment gas, but can not escape the polymer particles.
  • blocking devices such as e.g. Flaps, sliders or locks (rotary valves) may be arranged in the delivery lines.
  • each delivery line a branch, e.g. a pipe switch or the like is located.
  • the polymer particles are the solidified polymer melt drops.
  • the polymer particles usually have a teardrop-shaped, spherical or spherical shape. They usually have an average particle size of 0.2 mm to 5 mm, in particular 0.5 mm to 2 mm.
  • FIGS. 1 to 6 Exemplary embodiments of the apparatus according to the invention are shown in FIGS. 1 to 6.
  • Figure 1 shows a part of the apparatus. Shown is the part for combining the polymer particles, consisting of seven drip towers (1a-1g), seven conical junctions (visible 2a-2e) and seven conveyor pipes (3a-3g). The delivery pipes are brought together in a common downpipe 4.
  • a start-up flap (110) is shown in a conveyor (3e).
  • a flap can be located in each of the delivery lines (3a - 3g).
  • the dripping nozzle (5e) and supply lines for water as the cooling medium (6e) and removal lines for water vapor (8e) are shown in the drip tower (1e).
  • Figure 2 shows a part of the apparatus. Shown is the part for distributing the polymer melt from the reactor (10) through four melt lines (11a-d) to four drop nozzles (12a-d). It is a star-shaped arrangement.
  • Figure 2a shows a plan view and Figure 2b shows a side view of the plant part.
  • FIG. 2b shows by way of example in line (11c) a melt pump (13c), a melt filter (14c) and a starting valve (15c). Analogously, these apparatuses can also be located in the other melt lines.
  • FIG. 3a shows another possible star-shaped arrangement of the melt lines (21a-f) from the reactor (20) to the drip nozzles (not shown).
  • Figure 3b shows an arrangement with a main line (51) from the reactor (50) to four melt lines (52a-d) leading to the drip nozzles (not shown).
  • melt pump 53 In the main line there is a melt pump (53) and in the melt lines to the drip nozzles are melt pumps (54a - d). Again, in each case in the main line and / or in the melt lines to the drip nozzles melt filter and starting valves (not shown) are located.
  • the speed signals of the individual pumps are matched to one another in a control unit (55) and optionally also used to control process parameters in the reactor (50) and any precursors associated with the reactor.
  • the distributor pumps (54a-d) determine the melt flows to the individual drop nozzles and the main pump (53) must deliver the corresponding amount of melt from the reactor (50).
  • the delivery rates of the distributor pumps are kept constant (master) and the main pump is adapted (slave), which is e.g. can be done via a pressure control before the distribution pump.
  • the main pump (53) determines the melt flow through this line (52a-d), the melt streams to the individual drop nozzles via valves (not shown) are regulated.
  • FIG. 4 shows a part of the apparatus. Shown is the part for distributing the polymer melt from the reactor (30) through a main melt line (31) and through five branch lines (32a-e) to five drop nozzles (33a-e). The main line is returned via a return line (39) in the reactor (30). It is an arrangement with a loop.
  • a melt pump (34) In the main line (31) are a melt pump (34) and a melt filter (35).
  • a melt pump (36e), a melt filter (37e) and a start-up valve (38e) are shown in the line (32e). Analogously, these apparatuses can also be located in the other melt lines.
  • Figure 5 shows a part of the apparatus. Shown is the part for energy recovery.
  • Water vapor from the manifold (9) is fed via a line (43) in a heat exchanger (42).
  • a " compressor (41) Optionally located in front of the heat exchanger a " compressor (41).
  • a line (44) leads away from the heat exchanger, optionally via a further line (47), a closed circuit can be generated. Any necessary equipment for purifying the recirculating coolant (not shown) may be interposed therebetween.
  • An inlet line (45) and an outlet line (46) for another process medium (gas or liquid) are connected to the heat exchanger (42).
  • a process gas which is used for the thermal aftertreatment of the polymer particles, are heated.
  • FIG. 6 shows a cross section through a nozzle bar (60) with a round recess and a melt feed opening (61).
  • a round nozzle package (62) consisting of a nozzle pot (63), an inserted nozzle plate (64) with a nozzle hole ring (65), optionally a sieve package (66) and a tensioning device (67), into which a movable membrane ( 68) is clamped.
  • the tensioning device With the tensioning device, the filter pack and the nozzle plate are pressed into the nozzle pot, e.g. by means of a thread or a screw (not shown).
  • the nozzle pot (63) in correspondence with the melt supply port (61), there is an inlet port (69) for the polymer melt.
  • a connecting rod (70) Attached to the membrane (68) is a connecting rod (70) which is connected by a coupling (71) to a vibrating element (72).
  • the vibrating element is supported by a rotatable support frame (73).

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polymerisation Methods In General (AREA)
  • Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)

Abstract

L'invention concerne une installation de production de particules de polymère, comportant au moins un réacteur pour la production de polymère fondu, au moins deux colonnes à gouttes, au moins deux buses à gouttes associées aux colonnes à gouttes respectives, au moins une conduite de masse fondue, reliant ledit au moins un réacteur auxdites au moins deux buses à gouttes, et au moins deux conduites de refoulement chacune associées à une des colonnes à gouttes. L'invention se caractérise en ce que lesdites au moins deux conduites de refoulement sont réunies.
PCT/CH2005/000720 2004-12-07 2005-12-02 Installation de formation de gouttes Ceased WO2006060928A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410059069 DE102004059069A1 (de) 2004-12-07 2004-12-07 Vertropfungsanlage
DE102004059069.9 2004-12-07

Publications (2)

Publication Number Publication Date
WO2006060928A2 true WO2006060928A2 (fr) 2006-06-15
WO2006060928A3 WO2006060928A3 (fr) 2006-08-10

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CN110561638A (zh) * 2019-08-21 2019-12-13 安徽丰运高分子材料有限公司 一种用于密炼机的上料装置

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KR20170117163A (ko) * 2015-03-20 2017-10-20 사빅 글로벌 테크놀러지스 비.브이. 개선된 건조 방법
CN115608260B (zh) * 2022-11-16 2024-11-08 江苏福亿机械科技有限公司 一种带空气负压的辊压干法造粒设备

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KR20170118790A (ko) * 2015-03-20 2017-10-25 사빅 글로벌 테크놀러지스 비.브이. 개선된 건조 시스템
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KR102101279B1 (ko) 2015-03-20 2020-04-17 사빅 글로벌 테크놀러지스 비.브이. 개선된 건조 시스템
US11040320B2 (en) * 2015-03-20 2021-06-22 Sabic Global Technologies B.V. Drying systems
CN110561638A (zh) * 2019-08-21 2019-12-13 安徽丰运高分子材料有限公司 一种用于密炼机的上料装置

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DE102004059069A1 (de) 2006-06-08

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