WO1998053916A2 - Düse zur dosierung kleinster flüssigkeitsströme in hochtemperaturumgebung - Google Patents
Düse zur dosierung kleinster flüssigkeitsströme in hochtemperaturumgebung Download PDFInfo
- Publication number
- WO1998053916A2 WO1998053916A2 PCT/EP1998/002956 EP9802956W WO9853916A2 WO 1998053916 A2 WO1998053916 A2 WO 1998053916A2 EP 9802956 W EP9802956 W EP 9802956W WO 9853916 A2 WO9853916 A2 WO 9853916A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nozzle
- atomizing
- medium
- atomization
- hole
- Prior art date
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
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50019099A JP2001526588A (ja) | 1997-05-28 | 1998-05-20 | 非常に少量の液体流れを高温環境で計量するためのノズル |
EP98929346A EP0983122A2 (de) | 1997-05-28 | 1998-05-20 | Düse zur dosierung kleinster flüssigkeitsströme in hochtemperaturumgebung |
CA002291737A CA2291737A1 (en) | 1997-05-28 | 1998-05-20 | Nozzle for dosing liquid microflux in a high-temperature environment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19722338.9 | 1997-05-28 | ||
DE19722338A DE19722338A1 (de) | 1997-05-28 | 1997-05-28 | Düse zur Dosierung kleinster Flüssigkeitsströme in Hochtemperaturumgebung |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998053916A2 true WO1998053916A2 (de) | 1998-12-03 |
WO1998053916A3 WO1998053916A3 (de) | 1999-03-11 |
Family
ID=7830746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/002956 WO1998053916A2 (de) | 1997-05-28 | 1998-05-20 | Düse zur dosierung kleinster flüssigkeitsströme in hochtemperaturumgebung |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0983122A2 (de) |
JP (1) | JP2001526588A (de) |
CN (1) | CN1258235A (de) |
CA (1) | CA2291737A1 (de) |
DE (1) | DE19722338A1 (de) |
WO (1) | WO1998053916A2 (de) |
Families Citing this family (3)
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 (de) * | 2012-04-02 | 2017-12-27 | Valmet Technologies, Inc. | Vorrichtung zur Behandlung eines Fasernetzes |
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 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4150794A (en) | 1977-07-26 | 1979-04-24 | Camsco, Inc. | Liquid jet cutting nozzle and housing |
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 |
US5351889A (en) | 1991-10-16 | 1994-10-04 | The United States Of America As Represented By The Secretary Of The Navy | Flow tripped injector |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5413020A (en) * | 1977-06-30 | 1979-01-31 | Nippon Oxygen Co Ltd | Liquid fuel burner |
CA1324949C (en) * | 1988-12-22 | 1993-12-07 | C-I-L Inc. | Injection nozzle |
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 |
-
1997
- 1997-05-28 DE DE19722338A patent/DE19722338A1/de not_active Withdrawn
-
1998
- 1998-05-20 CA CA002291737A patent/CA2291737A1/en not_active Abandoned
- 1998-05-20 EP EP98929346A patent/EP0983122A2/de not_active Withdrawn
- 1998-05-20 JP JP50019099A patent/JP2001526588A/ja active Pending
- 1998-05-20 WO PCT/EP1998/002956 patent/WO1998053916A2/de not_active Application Discontinuation
- 1998-05-20 CN CN98805541A patent/CN1258235A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4150794A (en) | 1977-07-26 | 1979-04-24 | Camsco, Inc. | Liquid jet cutting nozzle and housing |
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 |
Also Published As
Publication number | Publication date |
---|---|
CA2291737A1 (en) | 1998-12-03 |
CN1258235A (zh) | 2000-06-28 |
WO1998053916A3 (de) | 1999-03-11 |
DE19722338A1 (de) | 1998-12-10 |
EP0983122A2 (de) | 2000-03-08 |
JP2001526588A (ja) | 2001-12-18 |
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