EP0983122A2 - Buse pour doser des microflux de liquide dans un environnement a haute temperature - Google Patents

Buse pour doser des microflux de liquide dans un environnement a haute temperature

Info

Publication number
EP0983122A2
EP0983122A2 EP98929346A EP98929346A EP0983122A2 EP 0983122 A2 EP0983122 A2 EP 0983122A2 EP 98929346 A EP98929346 A EP 98929346A EP 98929346 A EP98929346 A EP 98929346A EP 0983122 A2 EP0983122 A2 EP 0983122A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
atomizing
medium
atomization
hole
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Withdrawn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
EP98929346A
Other languages
German (de)
English (en)
Inventor
Jochen Baurmeister
Thomas Schäfer
Josef Schwab
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.)
Siemens Axiva GmbH and Co KG
Original Assignee
Aventis Research and Technologies GmbH and Co KG
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 Aventis Research and Technologies GmbH and Co KG filed Critical Aventis Research and Technologies GmbH and Co KG
Publication of EP0983122A2 publication Critical patent/EP0983122A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/24—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means incorporating means for heating the liquid or other fluent material, e.g. electrically
    • 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
    • B05B15/30—Dip tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/002—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour incorporating means for heating or cooling, e.g. the material to be sprayed

Definitions

  • Nozzle for dosing the smallest liquid flows in a high temperature environment
  • the invention relates to a device for atomizing a medium, comprising a nozzle tip with a nozzle body with at least one nozzle hole and a cooling device.
  • nozzles are known for example from US 5,351, 889 and US 5,253,810.
  • a nozzle tip with a spray nozzle with at least one spray hole is also known from US Pat. No. 4,150,794.
  • the atomizer body is followed by a seal that prevents the medium from escaping while bypassing the nozzle body.
  • Nozzles with the features mentioned at the outset are also used for metering very small amounts of catalyst in the pyrolysis of acetic acid to ketene and water.
  • the catalyzed acetic acid pyrolysis is used industrially for the production of ketene, diketene and acetic anhydride, using the following process:
  • Acetic acid is evaporated and preheated to production temperature.
  • the catalyst e.g. Triethyl phosphate, dosed in liquid form in the acetic acid vapor.
  • the mixture is kept at the reaction temperature in a tubular reactor. After the reaction zone, the mixture is cooled so that water and unreacted acetic acid condense.
  • the ketene is further processed depending on the desired follow-up product.
  • a disadvantage of this process is that, owing to the small amount of catalyst that is already dosed on a large industrial scale, a
  • the object of the invention was therefore to improve the known device.
  • a device of the type mentioned which is characterized in that the or each atomizing hole has a diameter of less than or equal to 50 ⁇ m, that the cooling device has a flow-through space for a cooling medium which surrounds the nozzle tip, so that the Device up to the exit of the
  • Spray nozzle hole can be temperature-controlled, and that a seal is arranged in the direction of flow behind the spray nozzle, which prevents the medium from escaping while bypassing the spray nozzle.
  • the invention thus relates to a device for atomizing a medium, comprising a nozzle tip with a nozzle body with at least one nozzle hole and a cooling device, characterized in that the or each nozzle hole has a diameter of less than or equal to 50 ⁇ m, that the cooling device has a flow-through space for a Has cooling medium which surrounds the nozzle tip, so that the device up to the outlet of the
  • Spray nozzle hole can be temperature-controlled, and that a seal is arranged in the direction of flow behind the spray nozzle, which prevents the medium from escaping while bypassing the spray nozzle.
  • the or each atomization hole has one
  • Diameters less than or equal to 40 preferably less than or equal to 30, particularly preferably less than or equal to 20 and very particularly preferably approximately 10 ⁇ m.
  • a metal seal preferably a silver seal, is advantageously used as the seal.
  • the atomizing body is preferably made of an alloy that contains platinum and / or iridium.
  • the device has at least one seal which prevents the medium from escaping bypassing the atomizing body and which is based on the Flow direction of the medium is arranged behind the atomizing body. This prevents abrasion from the seal from clogging the atomization hole.
  • a filter is used in front of the atomizing body, which likewise prevents the atomizing hole from becoming blocked.
  • the nozzle according to the invention offers the possibility of supplying liquid flows of less than 20 ml / min, preferably from 0.05-1, or up to 10 ml / min continuously in liquid form into a gas space with temperatures up to 1000 ° C., preferably up to 1100 ° C. dose.
  • a blockage of the atomization hole for example due to frequently observed coking of the catalyst during pyrolysis of acetic acid, no longer takes place due to the inventive design of the cooling.
  • Spraying the catalyst as a liquid jet in a pilot plant has the advantage of better transferability of the results to large plants.
  • metering as a liquid jet is more effective than pre-evaporation of the catalyst and metering in gaseous form, since in the latter case the nozzle was coked almost immediately.
  • the nozzle design offers the possibility of continuously atomizing the smallest amounts of liquid as a fine jet into hot gases. Areas of application are laboratory and pilot plant equipment where additives have to be liquid.
  • a nozzle 1 is shown, with which a liquid 13 can be conveyed through the nozzle tip 3 by means of a pump (not shown) via a stainless steel tube 2, which has a cooling jacket 8, with a pressure of up to 400 bar.
  • the tip 3 contains two mounting screws 4.5, which a spray body, the
  • the nozzle plate 6 has an atomization hole 7 with a hole diameter of 10-30 ⁇ m.
  • the tube 2 and the tip 3 are surrounded by the cooling jacket 8 so that the tube 2 can be heated to the nozzle tip 3, up to the outlet of the atomization hole 7. This is achieved in that the tip 3 of a space 12th is surrounded, which can be flowed through by a cooling medium 14.
  • the first seal 9 prevents the liquid 13 from escaping from the nozzle tip 3 bypassing the nozzle plate 6 between the screws 4, 5. It is arranged after the nozzle plate 6. This prevents abrasion of the seal 9 from clogging the atomization hole 7.
  • a second seal 10 prevents leakage between the screw 4 and the wall of the tip 3.
  • a filter 11 is inserted between the second seal 10 and the screw 4 and also prevents the atomization hole 7 from becoming blocked.
  • a guide tube 15 effectively distributes the cooling medium 14 into the space 12 around the nozzle tip 3.

Landscapes

  • Nozzles (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

L'invention concerne un dispositif pour atomiser un milieu, comportant une pointe de buse munie d'accord d'atomisation avec au moins un orifice d'atomisation, ainsi qu'un système de refroidissement. Ce dispositif est caractérisé en ce que l'orifice ou chaque orifice d'atomisation (7) présente un diamètre inférieur ou égal à 50 νm, en ce que le système de refroidissement (8, 12) possède une chambre (12) dans laquelle peut circuler un milieu de refroidissement (14) et qui entoure la pointe (3) de la buse, de sorte que le dispositif peut être thermorégulé jusqu'à la sortie de l'orifice d'atomisation (7), et en ce qu'un joint d'étanchéité (9) est disposé dans le sens d'écoulement en aval du corps d'atomisation (6), ce joint empêchant une fuite du milieu (13) autour du corps d'atomisation (6).
EP98929346A 1997-05-28 1998-05-20 Buse pour doser des microflux de liquide dans un environnement a haute temperature Withdrawn EP0983122A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19722338A DE19722338A1 (de) 1997-05-28 1997-05-28 Düse zur Dosierung kleinster Flüssigkeitsströme in Hochtemperaturumgebung
DE19722338 1997-05-28
PCT/EP1998/002956 WO1998053916A2 (fr) 1997-05-28 1998-05-20 Buse pour doser des microflux de liquide dans un environnement a haute temperature

Publications (1)

Publication Number Publication Date
EP0983122A2 true EP0983122A2 (fr) 2000-03-08

Family

ID=7830746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98929346A Withdrawn EP0983122A2 (fr) 1997-05-28 1998-05-20 Buse pour doser des microflux de liquide dans un environnement a haute temperature

Country Status (6)

Country Link
EP (1) EP0983122A2 (fr)
JP (1) JP2001526588A (fr)
CN (1) CN1258235A (fr)
CA (1) CA2291737A1 (fr)
DE (1) DE19722338A1 (fr)
WO (1) WO1998053916A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004001451A1 (de) * 2004-01-08 2005-08-11 Boehringer Ingelheim International Gmbh Vorrichtung zum Haltern eines fluidischen Bauteiles
EP2647760B1 (fr) * 2012-04-02 2017-12-27 Valmet Technologies, Inc. Dispositif pour traiter un voile de fibres
CN113237065B (zh) * 2021-01-13 2022-12-27 重庆川维石化工程有限责任公司 一种智能控制废硫酸裂解炉及废硫酸裂解工艺

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413020A (en) * 1977-06-30 1979-01-31 Nippon Oxygen Co Ltd Liquid fuel burner
US4150794A (en) * 1977-07-26 1979-04-24 Camsco, Inc. Liquid jet cutting nozzle and housing
CA1324949C (fr) * 1988-12-22 1993-12-07 C-I-L Inc. Ajutage d'injection
US5351889A (en) * 1991-10-16 1994-10-04 The United States Of America As Represented By The Secretary Of The Navy Flow tripped injector
US5253810A (en) * 1992-03-13 1993-10-19 The United States Of America As Represented By The Secretary Of The Navy High heat, high pressure, non-corrosive injector assembly
US5407136A (en) * 1992-09-18 1995-04-18 Iris Graphics, Inc. Ink-jet nozzle
US5346133A (en) * 1993-03-25 1994-09-13 The M. W. Kellogg Company High temperature liquid injection apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9853916A2 *

Also Published As

Publication number Publication date
JP2001526588A (ja) 2001-12-18
WO1998053916A3 (fr) 1999-03-11
WO1998053916A2 (fr) 1998-12-03
CN1258235A (zh) 2000-06-28
CA2291737A1 (fr) 1998-12-03
DE19722338A1 (de) 1998-12-10

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