CN101234314A - Device for particle generation - Google Patents
Device for particle generation Download PDFInfo
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- CN101234314A CN101234314A CNA2007101698773A CN200710169877A CN101234314A CN 101234314 A CN101234314 A CN 101234314A CN A2007101698773 A CNA2007101698773 A CN A2007101698773A CN 200710169877 A CN200710169877 A CN 200710169877A CN 101234314 A CN101234314 A CN 101234314A
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- nozzle
- melt
- molten drop
- cup
- heating
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Abstract
The device for the production of granulates by a melt crystallization process, comprises a nozzle pre-chamber (1) for receiving a melt, nozzles (5) for the production of melt drops (8), a tube (11) for cooling the drops, heating means (13, 14) for preventing undercooling of the nozzles, means for heating the melt in the nozzle pre-chamber, means for heating the melt present in the nozzle pre-chamber, means for production of a positive pressure in the nozzle pre-chamber, and means for production an oscillation of the melt present in the nozzle pre-chamber. The device for the production of granulates by a melt crystallization process, comprises a nozzle pre-chamber (1) for receiving a melt, nozzles (5) for the production of melt drops (8), a tube (11) for cooling the drops, heating means (13, 14) for preventing undercooling of the nozzles, means for heating the melt in the nozzle pre-chamber, means for heating the melt present in the nozzle pre-chamber, means for production of a positive pressure in the nozzle pre-chamber, and means for production an oscillation of the melt present in the nozzle pre-chamber. The nozzles are arranged in nozzle channels (12), which form an opened withdrawal chamber for the cooling tube downstream of outlets (6) of the nozzles. The heating means has an electrical heating element and a heat transfer liquid, which flows around the nozzle. An independent claim is included for procedure for the production of granulates by a melt crystallization process.
Description
Technical field
The present invention relates to a kind of device that is used for producing pellet, have: the nozzle cup that is used to hold melt by melt crystallization; The cooling tube that is used to produce the nozzle of molten drop and is used to cool off described molten drop.The present invention relates to a kind of method that is used for producing by melt crystallization pellet in addition, wherein melt is conducted through nozzle and produces molten drop, described molten drop subsequent crystallisation.
Background technology
In also being known as the melt crystallization method of granulation, liquid melt is infeeded and is divided into the molten drop of same modality on the head of cooling tube.Described molten drop drops downwards in the pipe and contacts with cold gas stream in sclerosis.At this, molten drop hardens into the preferably particle in 0.4 to 2mm scope of diameter.
Nozzle is the important component part that becomes to drip system, and described nozzle is positioned on the upper end of vertical cooling tube.The melt that is positioned at the nozzle cup enters into the cooling tube that is arranged on below the nozzle and is broken into identical molten drop at this by nozzle.
For this reason, a nozzle plate with hole is set usually, each nozzle is screwed in the described hole.But nozzle plate also can be only be made of the plate of the outlet with suitable dimension.The melt of heat is positioned on the upside of nozzle plate, and the downside of nozzle plate with have a cooling tube adjacency of cold air atmosphere.For mainly meet situation---promptly independently nozzle is screwed in the nozzle plate, the relative nozzle plate of the outlet of nozzle has a significant distance.The outlet that this means nozzle suffers the cold air atmosphere in the cooling tube and is heated insufficiently by heated melt.
Cause the danger of spray nozzle clogging thus, if the temperature of melt is not sufficiently to be in more than the fusion temperature of the material of waiting to become to drip.But in contrast, it is as much as possible little that the temperature of melt should keep, and is used to make the cooling of molten drop subsequent crystallisation to expend so that reduce.
Summary of the invention
Therefore the objective of the invention is, proposes a kind of by the apparatus and method that start described type, even they also can prevent the obstruction of nozzle reliably under the little situation of the temperature difference between the fusion temperature of the temperature of melt and this melt.
This purpose solved by the device of melt crystallization generation pellet by a kind of being used for, this device has: be used to hold the nozzle cup of melt, the cooling tube that is used to produce the nozzle of molten drop and is used to cool off described molten drop, this device is characterised in that, is provided with to be used to prevent the overcooled mechanism of nozzle.
The method that is used for producing by melt crystallization pellet according to the present invention is characterised in that, prevents nozzle supercooling to a temperature, molten drop crystallization in nozzle when this temperature, and wherein melt is conducted through nozzle and produces molten drop, described molten drop subsequent crystallisation.
According to the present invention, prevent the nozzle supercooling, that is to say to prevent that it is cooled on the temperature, molten drop crystallization in nozzle when this temperature.This can realize in the following manner, the suitable mechanism that is used for heated nozzle promptly is set and/or makes nozzle and the cold air atmosphere heat shielding that is positioned at the cooling tube under it.In other words: perhaps can be to nozzle transfer heat or can reduce the heat that is discharged to the cold air atmosphere on one's own initiative.
Possible thus is, the melt in the nozzle cup remains on the temperature, and this temperature only surpasses the fusion temperature of the material of waiting to become to drip slightly.Thereby the melt that has been heated is not cooled to it below hardening temperature and nonchoking nozzle in nozzle." nozzle " is understood as the body or the opening of form of ownership at this, and they are applicable to melt is divided into single drop.
In a kind of preferred form of implementation, nozzle is heated, and the melt that has been heated is discharged from described nozzle with the molten drop form.In another preferred form of implementation, nozzle is arranged in the nozzle passage, and described nozzle passage constitutes a discharge chamber of opening wide towards cooling tube in the downstream of jet expansion.Molten drop is not directly to carry out the cold air atmosphere of cooling tube from the discharge of nozzle, but carries out in being arranged on the discharge chamber of nozzle opening front.Though discharge the chamber is to open wide towards the direction of cooling tube, makes molten drop enter in the cooling tube with can having no obstacle.But set up a buffering atmosphere hot slightly with respect to the atmosphere in cooling tube in discharging the chamber, this buffering atmosphere prevents that jet expansion from by degree ground cooling like this, making melt at there sclerosis and plug nozzle.
Advantageously, except the mechanism that is used for heated nozzle, also be provided for heating the independent agency of the melt that is positioned at the nozzle cup.Advantageously, the melt in the nozzle cup is heated with indirect heat exchange with liquid thermophore, especially deep fat.For this reason, the wall of nozzle cup for example can constitute double braid covering, and thermophore flows in the chamber and melt heating or it is remained on the desired temperatures indirectly therebetween.Therefore, melt is remained on the temperature controllably, and this temperature has enough intervals with the fusing point of the material of waiting to become to drip.
If the local heat of the heating of melt and nozzle is irrespectively carried out, this has advantage so, and promptly the temperature of nozzle can be regulated in wide scope, and superheated melt for example not.
In a kind of preferred configuration of the present invention, the mechanism that is used for heated nozzle has electrical heating elements.That electrical heating elements for example can constitute is flexible, by the heating tape of resistance heated, this single or multiple lift ground, heating tape winding or lace are on nozzle.
Replace electrical heating elements ground, nozzle also is proved to be favourable by means of the heating of heat transport fluid.Preferred nozzle by the thermophore of liquid state around washing away and being heated on the desired temperatures at this.
The heating of nozzle and the heating of melt can be respectively undertaken or are undertaken by a common heater by heater independently.If with for example deep fat heating of thermophore, so for example the part of thermophore can and be delivered to nozzle by connecting pipe branch to melt, so that also can be around washing away described nozzle by indirect heat exchange.
Advantageously, the generation of molten drop is supported in the following way, promptly produces in check overvoltage in the nozzle cup.This is preferably undertaken or is undertaken by fluidstatic pressure by the top that inert gas especially gaseous nitrogen is imported to the nozzle cup is indoor, and this pressure can highly be regulated by the input that melt enters in the nozzle cup.
Advantageously verified equally, make the melt vibration in the nozzle cup, in melt, cause local pressure differential thus and melt Conveying is passed through nozzle.
Advantageously, the drop that comes out from nozzle cools off and solidifies in advance by cold gaseous nitrogen with direct heat exchange in cooling tube subsequently.The complete crystallization of molten drop or be hardened in fully in the cooling tube realizes forcibly.Preferred finally being set in the pond that is made of liquid nitrogen of molten drop carried out.Pass that cooling tube falls and the crystallization and from the nitrogen pond, export fully in the nitrogen pond of the molten drop that is frozen into pellet in advance by means of discharge system.The gaseous nitrogen that produces when Granulation Equipments moves preferably is used to passivation (inertisierung), is particularly preferred for the passivation of container filling.
The present invention is particularly useful for being applied in the melt of temperature between 40 ℃ and 300 ℃.This melt is usually directed to from the material of fine chemistry industry and extraordinary chemical industry, for example as the unrighted acid of the intermediate product of cosmetics industry or be used for the granules of pigments of ink for ink-jet printer.Change liquid state at this melt into by heating.
The present invention and known device or the method that is used for granulation have dramatic benefit:
According to the present invention, melt only is heated to more than the fusing point of material a bit, has therefore saved heat energy.In addition, reduced and be used for the molten drop cooling energy required, for example cryogenic nitrogen form that produces with after-hardening.In addition, can also process more sensitive melt without a doubt, described melt is damaged by superheated.
Avoided because the spray nozzle clogging that causes of the melt of sclerosis in advance, so granulation process only needs stop when changing product.The bothersome cleaning essential when having cancelled spray nozzle clogging in other cases to nozzle.Therefore realize the higher productivity ratio of equipment.
Device of the present invention simply and firmly constitutes, but simple adjustment ground and can using widely.Decide on actual conditions, the quantity of the size of equipment, its diameter and height and nozzle, size and layout can change simply.
Description of drawings
Explain the present invention and other details of the present invention in detail by means of embodiment illustrated in the accompanying drawings below.This illustrate:
Fig. 1 illustrates the Granulation Equipments by prior art,
Fig. 2 illustrates by Granulation Equipments of the present invention,
Fig. 3 illustrates the deformation program by Granulation Equipments of the present invention,
Fig. 4 illustrates another deformation program of the present invention,
Fig. 5 also illustrates alternative form of implementation of the present invention.
The specific embodiment
Fig. 1 illustrates the one-tenth that is used for producing by melt crystallization the so-called Granulation Equipments of pellet and drips system, as disclosed by prior art.A nozzle cup 1 is positioned on the head of the device that illustrates, and a kind of material of melt enters in this nozzle cup.Nozzle cup 1 remains on by means of the deep fat of heat on the temperature more than the fusion temperature of material, and this deep fat is arranged in the circular passage 2 around this nozzle cup 1.
The bottom 3 of nozzle cup 1 has a plurality of holes 4, and nozzle 5 is screwed to from below in the described hole.The jet expansion 6 of nozzle 5 has a relevant distance 7 of the length with nozzle 5 that originates in the bottom 3 of nozzle cup 1.
When equipment normally moved, the material of melt was imported in the nozzle 5 by in check overvoltage by nozzle cup 1, and described nozzle is divided into tiny molten drop 8 with continuous fused mass stream.Molten drop 8 passes a visual section 9 that is provided with form 10 and falls.Can observe and monitor the process of become dripping by form 10.
A cooling tube 11 is connected on the visual section 9, and molten drop directly contacts, is cooled with the atmosphere that is made of cold gaseous nitrogen in this cooling tube and crystallizes into the pellet of expectation at this.
In this known device, the bigger distance 7 between the bottom 3 of jet expansion 6 that is subjected to cold blanket of nitrogen and nozzle cup 1 can cause problem.Otherwise nozzle 5 by around the cold air atmosphere cool off consumingly and the only small heating in molten bath by heat, so partly degree ground cooling like this of the melt molten drop in the nozzle 5 makes the crystallization and jet expansion 6 stopped up at least in part of described molten drop.
In Fig. 2, schematically show according to Granulation Equipments of the present invention.Having nozzle cup 1 equipment as illustrated in fig. 1 deep fat, circumjacent circular passage 12 that is used for holding heat equally constitutes.The bottom 3 of nozzle cup 1 has the hole 4 of the nozzle 5 that band can be screwed into equally.Annular preferably is arranged in hole 4 with nozzle 5.
But the nozzle 5 with jet expansion 6 is not directly to extend into the visual section 9 that is positioned under it or the cold air atmosphere of cooling tube 11, but is positioned at nozzle passage 12.A nozzle good heat conductive, common metal is set for this reason holds body 13, this nozzle holds body and have cylindrical form in the form of implementation by Fig. 2.Towards the direction drilling nozzle passage 12 of cylinder axis, the layout of this nozzle passage and diameter are corresponding to the layout and the size of nozzle 5 in nozzle holds body 13.Nozzle holds the height of body 13 to be selected like this, makes this highly surpass the jet expansion 6 of nozzle 5 and the distance 7 of bottom 3.
Nozzle holds body 13 and constitutes a unit with the bottom 3 of nozzle cup 1, makes nozzle 5 be received in the nozzle passage 12.In this way, nozzle 5 directly is not subjected to the cold air atmosphere of cooling tube 11 or visual section 9.In addition, the part of the thermal energy in molten bath is held body 13 via nozzle and is guided to nozzle 5.Therefore on the decide of length of nozzle passage 12, the such degree of the cooling of nozzle 5 ground reduces, and makes nozzle 5 interior melts not reharden and plug nozzle.
Additionally, the heating element heater 14 of a hollow cylinder is set also in by the form of implementation of Fig. 2, this heating element heater surrounds nozzle and holds body 13.Heating element heater 14 for example can or be similar to 12 ground, circular passage by electrical heating and be mounted with the deep fat of heat or other thermophore.For fixing and isolate heating element heater 14, the heating element heater support 15 of a preferred bad as far as possible heat conduction be fixed on nozzle by screw connection 16 hold on the body 13.
The temperature of nozzle 5 and nozzle passage 12 peripheral regions can be regulated in wide temperature range by means of heating element heater 14.The mode of heating and/or the number of degrees of the melt in preferred heating element heater 14 and the nozzle cup 1 are irrespectively worked.The temperature of nozzle 5 is in this such selection, makes under the influence of its cold air atmosphere in cooling tube 11 it is not to cool off too doughtily and avoid because the obstruction of the jet expansion 6 that the melt of sclerosis causes.
Fig. 3 illustrates another configuration of the present invention, and wherein the heating of nozzle 5 is carried out with such heater, and this heater is the same with the heater of melt heating in making nozzle cup 1.A nozzle also is set in the form of implementation shown in Figure 3 holds body 13, this nozzle holds body and is provided with the nozzle passage 12 that is used to hold nozzle 5.Nozzle holds body 13 and is laid in this case in the nozzle cup 1.Have thermophore, for example the circular passage 2 of the deep fat of heat not only holds body 13 around nozzle cup 1 but also around nozzle.In this way, nozzle holds body 13 by being positioned at the thermophore heating of circular passage 12, and this nozzle holds body and is made of the material of good heat conductive and heat is continued to be directed on the nozzle 5.
Another preferred configuration of the present invention shown in Figure 4.Nozzle holds body 17 and constitutes hollow body in this case.Nozzle passage is made of sleeve 18, and described sleeve extend into hollow nozzle to be held in the body 17.Nozzle holds body 17 and has input part 19 and the efferent 20 that is used for thermophore, this heat transport fluid cross that nozzle holds the inside of body 17 and at this around washing away sleeve 18.According to Fig. 4, use same heating agent for the melt in the heated nozzle cup 1 and for heated nozzle holds body 17.For this reason, tube connector 21,22 circulations of heating agent by hold the flexibility between the body 17 at circular passage 2 and nozzle.
Fig. 5 illustrates another deformation program that is used for heated nozzle 5.Heating element heater constitutes flexible is with 23, and this band directly is wound on the nozzle 5 one, two or more position.Be with 23 in order to fix this, from a plate 25 being fixed on the bottom of nozzle cup 1 below by distance piece or contact pin 24.
Claims (11)
1. be used for producing the device of pellet, have: the nozzle cup (1) that is used to hold melt by melt crystallization; Be used to produce melt molten drop (8) nozzle (5) and be used to cool off the cooling tube (11) of described molten drop (8), it is characterized in that: be provided with and be used to prevent the overcooled mechanism of nozzle (5) (13,14,18,23).
2. by the described device of claim 1, it is characterized in that: described mechanism (13,14,18,23) is configured to the mechanism of heated nozzle (5).
3. by claim 1 or 2 described devices, it is characterized in that: described nozzle (5) is arranged in the nozzle passage (12,18), and described nozzle passage constitutes a discharge chamber of opening wide towards cooling tube (11) in the downstream of the outlet (6) of nozzle (5).
4. by each described device of claim 1 to 3, it is characterized in that: be provided with independently, be used for the mechanism (2) that heating is in the melt in the nozzle cup (1).
5. by each described device of claim 1 to 4, it is characterized in that: the described mechanism that is used for heated nozzle has electrical heating elements (14,23).
6. by each described device of claim 1 to 5, it is characterized in that: the described mechanism (2,21,19,20,22) that is used for heated nozzle (5) also is used for the melt in the heated nozzle cup (1).
7. by each described device of claim 1 to 6, it is characterized in that: the described mechanism that is used for heated nozzle (5) comprises heat transport fluid, and this heat transport fluid is around washing away nozzle (5).
8. by each described device of claim 1 to 7, it is characterized in that: be provided with the mechanism that is used in nozzle cup (1), producing overvoltage.
9. by each described device of claim 1 to 8, it is characterized in that: be provided with the mechanism that is used to make the melt vibration that is in the nozzle cup (1).
10. method that is used for producing pellet by melt crystallization, wherein melt is conducted through the molten drop (8) of nozzle (5) and generation melt, described molten drop subsequent crystallisation, it is characterized in that: prevent nozzle (5) supercooling to a temperature, molten drop can crystallization in nozzle (5) when this temperature.
11. by the described method of claim 10, it is characterized in that: described melt changes liquid phase into and belongs to fine chemistry industry and extraordinary chemical field by being heated on the temperature between 40 ℃ and 300 ℃.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006053632 | 2006-11-14 | ||
| DE102006053632.0 | 2006-11-14 | ||
| DE102006056119.8 | 2006-11-28 | ||
| EP06025716.9 | 2006-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101234314A true CN101234314A (en) | 2008-08-06 |
Family
ID=39918372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101698773A Pending CN101234314A (en) | 2006-11-14 | 2007-11-14 | Device for particle generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101234314A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254950A (en) * | 2018-02-09 | 2018-07-06 | 京东方科技集团股份有限公司 | A kind of quantum dot bead spray appliance |
| CN109946108A (en) * | 2019-03-19 | 2019-06-28 | 首钢集团有限公司 | A kind of molten drop slag specimen collection device |
-
2007
- 2007-11-14 CN CNA2007101698773A patent/CN101234314A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254950A (en) * | 2018-02-09 | 2018-07-06 | 京东方科技集团股份有限公司 | A kind of quantum dot bead spray appliance |
| CN108254950B (en) * | 2018-02-09 | 2021-01-08 | 京东方科技集团股份有限公司 | Quantum dot pellet spraying equipment |
| CN109946108A (en) * | 2019-03-19 | 2019-06-28 | 首钢集团有限公司 | A kind of molten drop slag specimen collection device |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080806 |