EP0903184A2 - Injecteur et son application à l'aspersion des lits de catalyseur - Google Patents

Injecteur et son application à l'aspersion des lits de catalyseur Download PDF

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Publication number
EP0903184A2
EP0903184A2 EP98117750A EP98117750A EP0903184A2 EP 0903184 A2 EP0903184 A2 EP 0903184A2 EP 98117750 A EP98117750 A EP 98117750A EP 98117750 A EP98117750 A EP 98117750A EP 0903184 A2 EP0903184 A2 EP 0903184A2
Authority
EP
European Patent Office
Prior art keywords
injector
tube
injectors
double
base body
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.)
Granted
Application number
EP98117750A
Other languages
German (de)
English (en)
Other versions
EP0903184A3 (fr
EP0903184B1 (fr
Inventor
Norbert Scholz
Klaus Dr. Pandl
Bernhard Dr. Knuth
Walter Schäfer
Joachim Borgwart
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0903184A2 publication Critical patent/EP0903184A2/fr
Publication of EP0903184A3 publication Critical patent/EP0903184A3/fr
Application granted granted Critical
Publication of EP0903184B1 publication Critical patent/EP0903184B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0892—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle

Definitions

  • the invention relates to injectors and in particular to two-substance injectors.
  • the invention relates to the use such injectors for spraying catalyst beds.
  • DE-OS 195 26 404 describes a device for dividing a first one Medium described using a second medium. It will a very low ratio of the exit areas of the respective openings for the second medium to those of the openings for the exit of the first medium described.
  • the object of the invention is therefore to provide an injector, which avoids the disadvantages of the prior art and those mentioned above Requirements fulfilled.
  • this injector is intended for use with the promotion of a silver catalyst with a large catalyst surface is available.
  • the injector is said to existing lock systems can be integrated into formaldehyde reactors.
  • the injector contains a Double jacket tube and a base body for single injectors.
  • the double jacket tube has an inner tube, suitable for guiding a mixture of Carrier gas and solid particles or liquid droplets, and an exterior Pipe suitable for carrying a propellant gas.
  • the basic body is with the tightly connected to both pipes of the double jacket pipe.
  • the basic body has connection openings that connect between the interior of the inner tube and one connection point for an inner guide element of a single injector, as well as connecting channels, the one Connection between the area between the inner tube and the outer tube of the double jacket tube and one connection point for each the inner guide element surrounding the outer guide element of a single injector form.
  • the basic body and individual injectors are designed in this way and arranged that a mixture supplied through the inner tube Carrier gas and solid particles or liquid droplets and one through the Area fed between the inner tube and the outer tube Propellant gas to swirl propellant gas, carrier gas and solid particles or liquid droplets and to a radial even spread of the mixture formed.
  • the nozzles and the injector are simple constructed, reliable in use and constructed so that the Injector can be adapted to existing flow conditions.
  • the Injector can in particular in an existing lock system of a formaldehyde reactor to get integrated.
  • connection element is present, the connection element ring-shaped holes for transport and even distribution of the propellant gas, which are dimensioned so that the Pressure loss when flowing through is many times lower than with Inflow into the pressure chamber of the single injector.
  • An annular distributor space can advantageously be present in the base body be the one with the area between the inner tube and the outer tube of the double jacket tube is connected. From this lead Connection channels to a connection point for an outer guide element of a single injector.
  • Preferably three to eight individual injectors are in a regular Polygon arranged connected to the base body.
  • injectors according to the invention in which the individual injectors are designed as two-component ring nozzle injectors.
  • the outer guide element of the individual injectors is designed and arranged so that the propellant gas in contact with the mixture of carrier gas and solid particles or liquid droplets a tangential flow component related to the axis of the concerned Has single injector.
  • the injector according to the invention can be designed so that the central one Spray direction of the individual injectors only one radial and one axial component referred to the axis of the double jacket tube.
  • the central spray direction of the individual injectors a tangential component related to the axis of the double jacket tube.
  • the invention further relates to the use of an inventive Injector for supplying a suspension to a catalyst bed, in particular one with a large surface.
  • this catalyst bed linear minimum dimensions of 0.5-3 m, preferably essentially have a circular shape.
  • the one according to the invention is particularly suitable Injector for feeding promoter material, in particular Phosphor promoter material, on a catalyst bed, in particular a silver catalyst bed, as it is used in particular in a formaldehyde reactor finds.
  • small amounts of solids in particular 0.1-10 g / m 2 , preferably 0.1-5 g / m 2 , can be uniformly distributed over large areas.
  • the injector according to the invention has a double jacket tube 1, 2 consisting of an inner tube 1 and an outer tube 2 consists.
  • the double jacket tube is via an intermediate piece 3, which is preferably three to twelve, in the illustrated case eight connecting holes 4, which run in the axial direction with respect to the double jacket tube, connected to a base body 5.
  • a annular distribution space 51 is provided, from which connecting channels, in the form of bores 52, to propellant gas annular spaces 10 of individual injectors 8,9,10,11 lead.
  • connection openings lead through an inner section of the base body, in the form of bores 70, radially outwards and axially downwards.
  • the Bores 70 connect the inside of the inner tube with spray nozzles 11 of the individual injectors 8,9,10,11.
  • the spray nozzles (inner guide elements) 11 are surrounded by outer guide cylinders 8.9. These cylinders (outer guide elements) can for example be screwed into the base body 5 be.
  • the individual injectors can be designed so that with respect to the central spray direction or the axis of the Single injectors generated a tangential component of the propellant gas flow becomes. This can preferably be done by the design of the outer guide cylinder 8.9, e.g. of their walls.
  • the individual injectors themselves can moreover be arranged so that they are a tangential exit component related to the axis of the double jacket tube.
  • an aerosol stream preferably finely divided solid material, in a carrier gas through the inner tube 1 and the holes 70 fed to the spray nozzles 11 of the individual injectors.
  • the Propellant gas flow over the ring area between the inner tube 1 and the outer tube 2 through the holes 4, the manifold 51, the holes 52 and the feed chambers 10 of the individual injectors are fed so that there is a strong swirling and mixing inside the individual injectors of the aerosol flow and the propellant gas flow.
  • Typical operating conditions for the propellant gas flow which preferably consists of Air there are pressures of 0.5 to 5 bar, while the aerosol, i.e. the Particles or droplets in an inert gas or compressed air, preferably with a pressure of 0.2 to 3.0 bar to the nozzle head or injector head becomes.
  • This operation of the injector is very smooth Distribution of solid material, in particular phosphorus doping material, reached via, for example, a catalyst bed. Merging the Aerosols and the propellant lead to optimal atomization and Distribution.
  • Example 1 (comparative example ):
  • a three-layer silver catalyst bed was placed in a production reactor applied with a total layer thickness of 2 cm.
  • the bottom layer consisted of silver crystals with a grain size of 1 to 2.5 mm, the middle one Silver crystals with a grain size of 0.75 to 1 mm, the upper layer made of silver crystals grain size 0.2 to 0.75 mm.
  • a gas mixture consisting of methane, water and air was passed through an initial fixed bed of silver catalyst which had been heated to 340 ° C.
  • the amount was increased during the 2-hour activation period to 4.5 tons of methanol, 3.1 tons of water and 7.8 tons of air per hour (final load).
  • the temperature in the fixed bed was 680 ° C. This flow rate was kept constant over the entire duration of the experiment.
  • 180 mg of phosphorus per m 2 of the cross-sectional area of the activated silver catalyst fixed bed in the form of powdered Na 4 P 2 O 7 were then sprayed on using a conventional injector, the supply of the gas mixture being continued.
  • the reactor was operated continuously and after several hours of waiting more amounts of phosphorus were applied to the phosphorus-doped silver catalyst fixed bed.
  • the catalyst bed was deactivated partial, which inter alia in the increasing methanol content in the end product and low process yield.
  • the deactivation of the catalyst was visual via camera monitoring visible through a dark spot on the catalyst surface.
  • Example 1 was repeated, but the phosphorus feed was stopped with a Injector performed according to the present invention.
  • the reactor was continued to operate, and after several hours of waiting additional amounts of phosphorus on the phosphorus-doped silver catalyst fixed bed upset. In total, phosphorus became 112 times within 49 days post-sprayed without the catalyst bed being deactivated.
  • Example 1 was repeated, but 180 mg of phosphorus per m 2 of the activated silver catalyst fixed bed in the form of a 2.0% strength by weight aqueous solution of Na 4 P 2 O 7 were sprayed onto the surface thereof using the injector according to the invention, with the supply the gas mixture was continued.
  • Example 1 was repeated, but 270 mg of phosphorus per m 2 of the cross-sectional area of the activated silver catalyst fixed bed in the form of a 0.3% strength by weight aqueous solution of Na 4 P 2 O 7 were sprayed onto the surface thereof using a conventional injector, wherein the supply of the gas mixture was continued.

Landscapes

  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Nozzles (AREA)
EP98117750A 1997-09-22 1998-09-18 Injecteur et son application à l'aspersion des lits de catalyseur Expired - Lifetime EP0903184B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19741752 1997-09-22
DE19741752A DE19741752A1 (de) 1997-09-22 1997-09-22 Injektor und dessen Verwendung zum Besprühen von Katalysatorbetten

Publications (3)

Publication Number Publication Date
EP0903184A2 true EP0903184A2 (fr) 1999-03-24
EP0903184A3 EP0903184A3 (fr) 2000-11-15
EP0903184B1 EP0903184B1 (fr) 2003-08-13

Family

ID=7843210

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98117750A Expired - Lifetime EP0903184B1 (fr) 1997-09-22 1998-09-18 Injecteur et son application à l'aspersion des lits de catalyseur

Country Status (6)

Country Link
US (1) US6276615B1 (fr)
EP (1) EP0903184B1 (fr)
JP (1) JPH11156249A (fr)
CN (1) CN1096892C (fr)
DE (2) DE19741752A1 (fr)
ES (1) ES2205350T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7547002B2 (en) 2005-04-15 2009-06-16 Delavan Inc Integrated fuel injection and mixing systems for fuel reformers and methods of using the same
US7766251B2 (en) 2005-12-22 2010-08-03 Delavan Inc Fuel injection and mixing systems and methods of using the same
US8074895B2 (en) 2006-04-12 2011-12-13 Delavan Inc Fuel injection and mixing systems having piezoelectric elements and methods of using the same
CN107088485A (zh) * 2017-06-06 2017-08-25 西安航天动力研究所 用于在空间环境中生成低速烟幕的撞击反射式喷射器

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1304149C (zh) * 2002-10-16 2007-03-14 天津理工学院 复合材料喷射成形中心掺混式喷嘴
US7347685B2 (en) * 2004-07-02 2008-03-25 General Regulator, Inc. Torch manifold with integrated nozzles
DE102004041272B4 (de) * 2004-08-23 2017-07-13 General Electric Technology Gmbh Hybridbrennerlanze
US7588199B2 (en) * 2004-08-25 2009-09-15 Spraying Systems Co. Build-up resistant air atomizing spray nozzle assembly
CN106622413A (zh) * 2016-12-28 2017-05-10 华东理工大学 基于3d打印的多喷嘴模块及其大批量生产颗粒的装置和技术
USD842979S1 (en) * 2017-05-24 2019-03-12 Hamworthy Combustion Engineering Limited Atomizer
US12290829B2 (en) * 2018-11-30 2025-05-06 Spraying Systems Co. Electrostatic spray drying nozzle assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19526404A1 (de) 1995-07-19 1997-01-23 Basf Ag Verfahren und Vorrichtung zur Zerteilung eines Mediums

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
FR1460927A (fr) * 1965-10-05 1966-12-10 Comm Materiel Et D Outil S Soc Perfectionnements aux pistolets à peinture
US4518120A (en) * 1982-08-18 1985-05-21 Shell Oil Company Non-fouling oil atomization tip
SE449449B (sv) * 1984-11-26 1987-05-04 Bejaco Ab Forfarande for inblandning av finfordelad vetska i ett gasflode samt anordning for utovande av forfarandet
DE3762288D1 (de) * 1987-02-13 1990-05-17 Bbc Brown Boveri & Cie Zerstaeuberduese.
FR2641365B1 (fr) * 1988-12-30 1991-12-13 Pillard Chauffage Procedes et dispositifs pour pulveriser finement un combustible liquide et bruleurs equipes de ces dispositifs
US5271562A (en) * 1993-03-01 1993-12-21 The Babcock & Wilcox Company Dual fluid atomizer exit orifice shield gas supply housing
FR2741424B1 (fr) * 1995-11-17 1998-01-02 Schlumberger Services Petrol Bruleur a faible pollution, pour essais de puits petroliers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19526404A1 (de) 1995-07-19 1997-01-23 Basf Ag Verfahren und Vorrichtung zur Zerteilung eines Mediums

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
THOMAS RICHTER, STEFAN WILHELM: "maschinenmarkt", 1991, article "kalkulierter sprueh - methoden des zerstaeubens von fluessigkeiten in der verfahrenstechnik", pages: 26FF

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7547002B2 (en) 2005-04-15 2009-06-16 Delavan Inc Integrated fuel injection and mixing systems for fuel reformers and methods of using the same
US7766251B2 (en) 2005-12-22 2010-08-03 Delavan Inc Fuel injection and mixing systems and methods of using the same
US8074895B2 (en) 2006-04-12 2011-12-13 Delavan Inc Fuel injection and mixing systems having piezoelectric elements and methods of using the same
CN107088485A (zh) * 2017-06-06 2017-08-25 西安航天动力研究所 用于在空间环境中生成低速烟幕的撞击反射式喷射器
CN107088485B (zh) * 2017-06-06 2019-03-08 西安航天动力研究所 用于在空间环境中生成低速烟幕的撞击反射式喷射器

Also Published As

Publication number Publication date
US6276615B1 (en) 2001-08-21
CN1214964A (zh) 1999-04-28
ES2205350T3 (es) 2004-05-01
DE19741752A1 (de) 1999-03-25
JPH11156249A (ja) 1999-06-15
DE59809268D1 (de) 2003-09-18
EP0903184A3 (fr) 2000-11-15
CN1096892C (zh) 2002-12-25
EP0903184B1 (fr) 2003-08-13

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