EP1150764A1 - Vorrichtung zum wechseln einer düsenplatte eines prillturmes und verfahren zum automatisierten wechsel - Google Patents
Vorrichtung zum wechseln einer düsenplatte eines prillturmes und verfahren zum automatisierten wechselInfo
- Publication number
- EP1150764A1 EP1150764A1 EP00901591A EP00901591A EP1150764A1 EP 1150764 A1 EP1150764 A1 EP 1150764A1 EP 00901591 A EP00901591 A EP 00901591A EP 00901591 A EP00901591 A EP 00901591A EP 1150764 A1 EP1150764 A1 EP 1150764A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle plate
- prill
- tower
- prill tower
- nozzle
- 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- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/12—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings
- C07C39/15—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring polycyclic with no unsaturation outside the aromatic rings with all hydroxy groups on non-condensed rings, e.g. phenylphenol
- C07C39/16—Bis-(hydroxyphenyl) alkanes; Tris-(hydroxyphenyl)alkanes
Definitions
- the invention relates to a device for changing a nozzle plate of a prilling tower, in which molten bisphenol-A is introduced into the prilling tube through a plurality of nozzles in the nozzle plate and cooled to room temperature for prilling production, and a method for automated changing by means of such a device.
- Bisphenols are chemical compounds with two phenol groups obtained by reacting phenol with ketones, bisphenol-A (2,2-bis (4-hydroxyphenyl) propane)) being formed by the reaction of phenol and acetone.
- Bisphenol-A is processed into epoxy resins, polycarbonates and polysulfones. To facilitate filling, transport and storage, a bisphenol
- the bisphenol melt is introduced into the prill tower head by means of a nozzle plate which is arranged on the prill tower head.
- the nozzle plate is preferably spherically curved.
- a large number of holes are evenly distributed on the surface of the nozzle plate.
- the invention is therefore based on the object of providing a device for changing such a nozzle plate, which makes it possible to keep the admission pressure of the nozzle plate in a defined range for different load ranges of a prilling tower.
- the nozzle changing device can be operated automatically from the outside and does not cause unnecessary downtimes of the prilling tower when the load range is changed.
- the object is achieved in that at least two nozzle plates are provided, which can be brought linearly into the operating position or changing position along a guide by means of a suitable drive.
- slide rails are provided for guiding the nozzle plates, which have a length of at least twice the length of the nozzle plate, preferably four times the length of the nozzle plate.
- the slide rails are made of a copper bronze, preferably a CuSn 8 alloy, at least on their surface.
- Alloy is reliably resistant to bisphenol vapors.
- a further embodiment of the invention provides that the slide rails and / or the nozzle plates have a ground surface at their contact area.
- a roughness depth of 0.8 ⁇ m has proven to be particularly useful here.
- At least one displacement cylinder is provided as the drive for displacing the nozzle plate.
- the use of a single-piston system is preferred, in which the displacement cylinder can be pneumatically loaded. The design effort for a centrally attacking single
- the displacement cylinder is significantly less than that of two or more pistons working in parallel.
- a pressure cylinder is provided for sealing the nozzle plate on the opening in the prill tower head, which can preferably be acted upon hydraulically.
- the respectively active nozzle plate is pressed of preferably 200 bar pressed onto the opening in the prill tower head.
- the nozzle plate is sealed on the product side via an O-ring seal, e.g. made of Viton B, on the gas side towards the prill head.
- FIG. 1 shows a first embodiment of the nozzle changing device according to the invention in plan view
- Fig. 2 shows another embodiment of the nozzle changing device in a schematic representation
- Fig. 3 is a schematic diagram of the melt task to explain the change process of the nozzle changing device.
- FIG. 1 shows the device according to the invention for changing a nozzle plate 1 of a prilling tower, the nozzle plate 1 having a nozzle 2 consisting of concentrically arranged bores (only shown schematically), which in the operating position of the nozzle plate 1 is located centrally above the one not shown
- Opening of a prill tower 3 indicated only schematically.
- a plurality of nozzle plates 1 are now provided, which can be brought linearly into the operating position or changing position along a guide by means of a suitable drive.
- slide rails 4 are provided as guides, which in the exemplary embodiment shown are approximately 2 ′ /. Times the length of a nozzle plate 1.
- the slide rails 4 have a surface made of copper bronze, preferably a CuSn 8 alloy.
- the slide rails 4 and / or the nozzle plates 1 are provided, at least in their contact area, with a ground surface, which is preferably 0.8 ⁇ m.
- a pneumatically actuated displacement cylinder 5 is used as the drive for displacing the nozzle plates 1, which is arranged such that it is arranged parallel to the slide rails 4 and engages the nozzle plates 1 in the center.
- the slide rails 4 are preferably essentially one
- a preferred nozzle changing device in which the length of the slide rails 4 is approximately four times the length of the nozzle plate. This is particularly preferred for automated operation, since four different positions are created in this way.
- a cleaned nozzle plate 1 is first brought into position IV (reserve position) and from there it is moved from position A to position III (preheating position) by means of the displacement cylinder 5 by moving the displacement cylinder into position B.
- a new nozzle plate 1 can be inserted, which in turn is then moved from reserve position IV to preheating position III with the aid of displacement cylinder 5.
- the nozzle plate 1 intended for operation which has now been preheated, moves from position III to position II (operating position).
- the nozzle plate In the operating position, the nozzle plate is pressed in a sealing manner with a pressure cylinder 6, which is only indicated, onto the opening of the prill tower 3, which is also only indicated. To change the nozzle plate again, it is moved from position II to position I (removal position), as described above, after the pressure of the pressure cylinder 6 has been released.
- the soiled nozzle plate 1 can be removed from position I and, after cleaning, brought back to the reserve position IV.
- the valves 7 and 8 are switched in such a way that the bisphenol melt is moved to the prilling tower 3 in a temperature and quantity-controlled manner by means of a melt pump 9.
- the nozzle plate 1, which is only shown schematically, is hydraulically sealed with a pressure cylinder (not shown here) and a pressure of 200 bar on the product side via an O-ring seal made of Viton B and on the gas side to the prill tower 3.
- the pneumatic displacement cylinder 5 (see FIG. 2) is in position A. In the device, three nozzle plates are inserted, one in position II (operating position), one in position III (preheating position) and one in
- Position IV (reserve position).
- the "ejection space" for the nozzle plate to be changed ie position I) is free.
- valve 7 In preparation for changing the nozzle, the valve 7 is switched so that the bisphenol melt is diverted from the prill tower 3 to the melt container 10.
- Valve 8 is switched, it closes the melt path and at the same time opens the nitrogen supply to prill tower 3 in order to initiate the N 2 purge. So that the pipeline between valve 7 and 8 can run clean, an adjustable timing element is provided for switching the valve 8. By switching valve 8, the N 2 purging process is completed and the N 2 circuit fan is switched off.
- Pressure in the prill tower 3 is reduced by relaxing behind the circuit filter to P ü less than 4 mbar.
- the actual nozzle changing process is initiated by relieving the pressure on the hydraulic pressure cylinder 6.
- the pneumatic displacement cylinder 5 moves from position A to position B and thereby moves all three nozzle plates 1.
- the nozzle plate that was previously in operation moves the free ejection area (from II to I), the preheated nozzle plate 1 in the operating position (from III to II) and the reserve plate in the preheating zone (from IV to III).
- the hydraulic pressure cylinder 6 is put under pressure again, so that the tightness in the Area of the nozzle plate 1 is guaranteed.
- the displacement cylinder then moves back to its starting position A.
- the operating pressure is set to approx. 50 mbar by feeding nitrogen N 2 .
- the nitrogen cycle fan is then switched on and the hydraulic pressure cylinder 6 is pressurized.
- the pressure of the pressure cylinder 6 unlocks the valve 7, which must be switched over to restart the prilling tower 3.
- the melt feed to the prill tower 3 is released by switching the valve 7.
- nozzle plates 1 To clean the nozzle plates 1, they are after operation in an ultrasonic bath in dilute sodium hydroxide solution (6.5% NaOH) at ambient temperatures for about 30 minutes. cleaned. Thereafter, the nozzle plates 1 are rinsed vigorously with fully demineralized water and dried before reuse.
- dilute sodium hydroxide solution (6.5% NaOH)
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Glanulating (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19904407 | 1999-02-04 | ||
| DE19904407A DE19904407C2 (de) | 1999-02-04 | 1999-02-04 | Vorrichtung zum Wechseln einer Düsenplatte eines Prillturmes und Verfahren zum automatisierten Wechsel |
| PCT/EP2000/000518 WO2000045946A1 (de) | 1999-02-04 | 2000-01-24 | Vorrichtung zum wechseln einer düsenplatte eines prillturmes und verfahren zum automatisierten wechsel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1150764A1 true EP1150764A1 (de) | 2001-11-07 |
Family
ID=7896346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00901591A Withdrawn EP1150764A1 (de) | 1999-02-04 | 2000-01-24 | Vorrichtung zum wechseln einer düsenplatte eines prillturmes und verfahren zum automatisierten wechsel |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US6695991B1 (de) |
| EP (1) | EP1150764A1 (de) |
| JP (1) | JP2002536154A (de) |
| KR (1) | KR100638752B1 (de) |
| CN (1) | CN100488615C (de) |
| AU (1) | AU2293100A (de) |
| BR (1) | BR0007927A (de) |
| CZ (1) | CZ20012800A3 (de) |
| DE (1) | DE19904407C2 (de) |
| HK (1) | HK1042664A1 (de) |
| PL (1) | PL350139A1 (de) |
| WO (1) | WO2000045946A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4706181B2 (ja) * | 2004-04-13 | 2011-06-22 | 株式会社カネカ | 液滴製造装置 |
| US8329073B2 (en) | 2010-06-30 | 2012-12-11 | Honeywell International Inc. | Variable-orifice prill plate |
| CN106378057B (zh) * | 2016-11-29 | 2019-01-01 | 浙江兰博生物科技股份有限公司 | 一种改进的烟酰胺熔融喷雾造粒塔及其运作方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5481175A (en) * | 1977-12-13 | 1979-06-28 | Sumitomo Durez Co | Method and apparatus for pelletizing melt matter |
| US4793783A (en) * | 1987-01-20 | 1988-12-27 | The Dow Chemical Company | Apparatus for producing prills |
| ES2074490T5 (es) | 1990-03-22 | 2004-02-16 | Biotest Pharma Gmbh | Procedimiento para la elaboracion de un preparado de inmunoglobulina g tolerable por via intravenosa. |
| JP3394550B2 (ja) * | 1992-09-30 | 2003-04-07 | 新日鐵化学株式会社 | ビスフェノールaプリルの製造方法 |
| JP3014228B2 (ja) * | 1992-10-27 | 2000-02-28 | 千代田化工建設株式会社 | 向流式造粒設備の滴下ノズル |
| JP2790399B2 (ja) * | 1992-10-27 | 1998-08-27 | 千代田化工建設株式会社 | 向流式造粒設備 |
-
1999
- 1999-02-04 DE DE19904407A patent/DE19904407C2/de not_active Expired - Fee Related
-
2000
- 2000-01-24 EP EP00901591A patent/EP1150764A1/de not_active Withdrawn
- 2000-01-24 PL PL00350139A patent/PL350139A1/xx not_active Application Discontinuation
- 2000-01-24 US US09/890,018 patent/US6695991B1/en not_active Expired - Fee Related
- 2000-01-24 KR KR1020017009792A patent/KR100638752B1/ko not_active Expired - Fee Related
- 2000-01-24 WO PCT/EP2000/000518 patent/WO2000045946A1/de not_active Ceased
- 2000-01-24 AU AU22931/00A patent/AU2293100A/en not_active Abandoned
- 2000-01-24 JP JP2000597056A patent/JP2002536154A/ja active Pending
- 2000-01-24 BR BR0007927-8A patent/BR0007927A/pt not_active IP Right Cessation
- 2000-01-24 CN CNB008034710A patent/CN100488615C/zh not_active Expired - Fee Related
- 2000-01-24 HK HK02104361.1A patent/HK1042664A1/zh unknown
- 2000-01-24 CZ CZ20012800A patent/CZ20012800A3/cs unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0045946A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100488615C (zh) | 2009-05-20 |
| HK1042664A1 (zh) | 2002-08-23 |
| KR100638752B1 (ko) | 2006-10-26 |
| US6695991B1 (en) | 2004-02-24 |
| AU2293100A (en) | 2000-08-25 |
| JP2002536154A (ja) | 2002-10-29 |
| CN1338973A (zh) | 2002-03-06 |
| BR0007927A (pt) | 2002-05-14 |
| PL350139A1 (en) | 2002-11-04 |
| DE19904407C2 (de) | 2001-09-20 |
| DE19904407A1 (de) | 2000-08-17 |
| CZ20012800A3 (cs) | 2002-01-16 |
| KR20020003191A (ko) | 2002-01-10 |
| WO2000045946A1 (de) | 2000-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
Effective date: 20010904 |
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| AK | Designated contracting states |
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| 17Q | First examination report despatched |
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| GRAH | Despatch of communication of intention to grant a patent |
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| RTI1 | Title (correction) |
Free format text: METHOD FOR THE AUTOMATIC EXCHANGE OF A DIE PLATE OF A PRILLING TOWER |
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| GRAH | Despatch of communication of intention to grant a patent |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
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| 18D | Application deemed to be withdrawn |
Effective date: 20100803 |