EP0451046A1 - Lanze zur Pulpendispersion - Google Patents

Lanze zur Pulpendispersion Download PDF

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Publication number
EP0451046A1
EP0451046A1 EP91400891A EP91400891A EP0451046A1 EP 0451046 A1 EP0451046 A1 EP 0451046A1 EP 91400891 A EP91400891 A EP 91400891A EP 91400891 A EP91400891 A EP 91400891A EP 0451046 A1 EP0451046 A1 EP 0451046A1
Authority
EP
European Patent Office
Prior art keywords
lance
pulp
orifices
tube
rotation
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
EP91400891A
Other languages
English (en)
French (fr)
Other versions
EP0451046B1 (de
Inventor
Christian Duez
Jean-Claude Semedard
Jean-Xavier Morin
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.)
Stein Industrie SA
Original Assignee
Stein Industrie SA
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 Stein Industrie SA filed Critical Stein Industrie SA
Publication of EP0451046A1 publication Critical patent/EP0451046A1/de
Application granted granted Critical
Publication of EP0451046B1 publication Critical patent/EP0451046B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/22—Fuel feeders specially adapted for fluidised bed combustion apparatus
    • 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
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
    • B05B7/0458—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber the gas and liquid flows being perpendicular just upstream the mixing chamber
    • 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
    • B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge

Definitions

  • the present invention relates to a device for projecting and dispersing a pulp by means of a working gas.
  • This device is called here "lance” because it typically has, although not necessarily, an elongated shape.
  • the characteristic of a pulp is that it is often a very viscous or pasty product and most often very abrasive, which is handled with difficulty using pumps generally of the concrete pump type, and which does not can therefore be sprayed with the same methods as those used for less viscous fluids such as water or fuel oil for example.
  • the speed with which the pulp is conveyed is generally between 0.1 and 2 m / sec.
  • the gaseous jets thus formed disperse and accelerate the pulp so that it forms a jet at the outlet of this tube.
  • lance they are radial. They disintegrate the pulp column and give it a high axial speed. They thus create a long and concentrated spray. The results obtained with such lances degrade very quickly as soon as the water content is reduced and the pulp becomes very viscous.
  • the present invention aims in particular to allow a more efficient dispersion of the pulp even in the case where the content of the pulp in liquid is relatively low.
  • a lance which comprises the common elements previously mentioned and which, compared to the first known lance mentioned previously, is characterized in that some of the dispersion orifices are orifices for rotating which has oblique axes for driving the rapidly rotating pulp and which are situated at suitably chosen distances from the end of the central tube.
  • Figure 1 shows an overall elevational view of a lance according to the present invention.
  • Figures 4, 5 and 6 show cross-sectional views of this lance along planes IV-IV, V-V and VI-VI of Figure 2.
  • a central cylindrical tube 1 having an internal radius of 32.5 mm and a thickness of 5 mm, and a concentric annular conduit 2 which is closed on the end of the tube 1, completely or with a slight game, and which forms by a sleeve 2A fixed on the tube 1.
  • the pulp circulates in the central tube 1 under a pressure of 5000 Pascals supplied by a pump 12 which constitutes said means for supplying pulp.
  • the engine gas circulates in the annular conduit 2. It is constituted by air which is compressed by a compressor 14 which supplies a pressure of 30,000 Pascals and which constitutes said gas supply means. It is injected into the pulp at the end of the lance through three series of calibrated orifices, 3, 4 and 5 opening into the central tube. Each of these series is formed of orifices distributed circumferentially in a transverse plane.
  • a series of orifices 3 constitutes the disintegration orifices. It is intended to inject the engine gas inside the pulp column so as to disintegrate it.
  • the axes of these orifices are preferably at least radial or oriented so as to penetrate the interior of a fictitious cylinder concentric with the pulp duct, and with a radius less than or equal to 1/3 of that of the central tube.
  • These orifices have, for example, a diameter of 6.5 mm and are 5 in number.
  • Another series of orifices 4 constitutes the rotational orifices. It is intended to inject the engine gas tangentially to the pulp flow. The gas then gives the pulp a high speed of rotation and creates a film of pulp on the inner surface of the central tube 1. This film of pulp will burst and flourish in the form of a cone leaving the outlet 1B of spear.
  • the axes 4A of these orifices are tangent to a fictitious circle 4B with a radius between 3/4 and 1/6 of the radius of the central tube 1.
  • These orifices have, for example, a diameter of 6.5 mm and are 10 in number. .
  • a series of peeling orifices 5 is added in order to create a thin sheath of gas around the pulp to facilitate its flow.
  • These orifices are arranged upstream of the disaggregation and rotation series. They have for example a diameter of 3 mm and are 6 in number.
  • a clearance 6 is maintained between the end of the sleeve 2A and the central tube 1. This clearance is between 0.01 times and 0.1 times the inside radius of the central tube.
  • the present invention is particularly suitable for injecting carbon pulp or carbonaceous material into furnaces of a fluidized bed boiler because, thanks to the speed of rotation imparted to the pulp by the working gas, it develops a jet with a dispersion important and allows a good distribution of the pulp in the hearth of the boiler.
  • This lance is then executed either in refractory steel or in ceramic to limit wear due to temperature and abrasion by solid particles of the pulp.
  • the lance given in example was intended for an injection of pulp in a fluidized bed boiler under atmospheric pressure, the invention also applies to an injection in pressurized enclosures and in particular, in fluidized beds or pressurized gasifiers.
  • the pulp has for example a viscosity such that, in a 100 mm diameter pipe, the pressure drop at a flow rate of 10 m3 / h, is between 100 to 100,000 Pascals.
  • a known lance suitable for dispersing such a fuel is described in the document Patent Abstracts of Japan vol. 10, no.257 (Babcock Hitachi K.K.). It comprises a particle separation chamber according to their diameters in which an emulsion formed by this fuel and water vapor is driven in rotation by holes tangentially injecting water vapor. The fuel thus emulsified and separated passes through an axial outlet orifice 25 and peripheral orifices 24 whose diameter would be too small if it were a question of dispersing a carbon pulp.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paper (AREA)
  • Air Transport Of Granular Materials (AREA)
EP91400891A 1990-04-02 1991-04-02 Lanze zur Pulpendispersion Expired - Lifetime EP0451046B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004200A FR2660215B1 (fr) 1990-04-02 1990-04-02 Lance de dispersion de pulpe.
FR9004200 1990-04-02

Publications (2)

Publication Number Publication Date
EP0451046A1 true EP0451046A1 (de) 1991-10-09
EP0451046B1 EP0451046B1 (de) 1993-10-13

Family

ID=9395361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400891A Expired - Lifetime EP0451046B1 (de) 1990-04-02 1991-04-02 Lanze zur Pulpendispersion

Country Status (6)

Country Link
US (1) US5188296A (de)
EP (1) EP0451046B1 (de)
DE (1) DE69100493T2 (de)
ES (1) ES2046867T3 (de)
FI (1) FI98406C (de)
FR (1) FR2660215B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111224U1 (de) * 1991-09-10 1993-01-21 Siemens AG, 8000 München Dampfbetriebene Zerstäuberdüse, insbesondere für zähflüssige Suspensionen und Lösungen
WO2020012043A1 (es) 2018-07-09 2020-01-16 Soriano Azorin Juan Jose Sistema de formación y emisión de fluidos en forma de gel por medio de una lanza con dispositivo venturi

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5722802A (en) * 1995-06-09 1998-03-03 Low Emission Paint Consortium Powder delivery apparatus
DE19614192A1 (de) * 1996-04-10 1997-10-16 Abb Research Ltd Dispergiersystem für eine Pulversprüheinrichtung
US6053420A (en) * 1996-04-10 2000-04-25 Abb Research Ltd. Dispersion apparatus and process for producing a large cloud of an electrostatically charged powder/air mixture
US6485284B1 (en) * 1997-11-06 2002-11-26 Matsys Gas assisted flow tube and filling device
US6915966B2 (en) * 2003-01-29 2005-07-12 Specialty Minerals (Michigan) Inc. Apparatus for the gunning of a refractory material and nozzles for same
US7854397B2 (en) * 2005-01-21 2010-12-21 Specialty Minerals (Michigan) Inc. Long throw shotcrete nozzle
PL1890823T3 (pl) * 2005-05-06 2014-01-31 Dieter Wurz Dysza rozpylająca, układ rozpylający i sposób eksploatacji dyszy rozpylającej i układu rozpylającego
DE102006009147A1 (de) * 2006-02-24 2007-08-30 Wurz, Dieter, Prof. Dr.-Ing. Zweistoffdüse mit Weitwinkelstrahl
DE102007003665B4 (de) * 2006-08-09 2017-08-31 Martin GmbH für Umwelt- und Energietechnik Düse zum Einbringen und Dosieren eines Behandlungsmediums in den Abgasstrom bei Verbrennungsprozessen
EP2061605B1 (de) * 2006-08-28 2014-05-14 Air Products and Chemicals, Inc. Vorrichtung und Verfahren zur Kontrolle des Durchflusses einer Kryogen-flüssigkeit
US20080110804A1 (en) * 2006-11-10 2008-05-15 Veltri Fred J Slurry transfer line
WO2011080754A2 (en) * 2009-12-29 2011-07-07 Indian Oil Corporation Ltd. A feed nozzle assembly
BR112012024274A2 (pt) * 2010-03-26 2016-05-24 Philip Morris Products Sa aparelho para utilização na formação de um produto de saquinho de tabaco
CN102454984B (zh) * 2010-11-01 2013-09-18 烟台龙源电力技术股份有限公司 一种风道点火系统及床下点火燃烧器
WO2015198285A1 (en) * 2014-06-27 2015-12-30 Tubitak A coal feeding system
CN108660857B (zh) * 2018-05-31 2023-08-08 河南大指造纸装备集成工程有限公司 一种造纸化学品在线注入器及其使用方法
CZ2018688A3 (cs) * 2018-12-10 2020-04-15 Vysoká Škola Báňská - Technická Univerzita Ostrava Zařízení pro dávkování kalů do fluidního ohniště

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897007A (en) * 1973-09-10 1975-07-29 Joseph G Roy Apparatus for atomizing liquid fuels for the combustion process

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US1451063A (en) * 1923-04-10 Burner
US857096A (en) * 1902-11-04 1907-06-18 Alvin C Mccord Conveying system.
US1051905A (en) * 1910-03-09 1913-02-04 Alvin C Mccord Conveying system.
GB685420A (en) * 1950-09-30 1953-01-07 Basic Refractories Inc Nozzle for the projection of granular material
US2946628A (en) * 1958-01-09 1960-07-26 Frank A Bauregger Sand booster
US3840181A (en) * 1970-12-23 1974-10-08 Wintershall Ag Installation for burning combustible mixtures
US4011995A (en) * 1975-04-09 1977-03-15 Otis Engineering Corporation Burner nozzle assembly
SU751940A2 (ru) * 1978-03-13 1980-07-30 Центральный Научно-Исследовательский И Проектно-Экспериментальный Институт Организации,Механизации И Технической Помощи Строительству Установка дл укладки бетонной смеси
JPS6183817A (ja) * 1984-09-28 1986-04-28 Babcock Hitachi Kk 石炭−水スラリ燃料用バ−ナ装置
US4796814A (en) * 1987-09-09 1989-01-10 Construction Forms, Inc. Semi-liquid cementitious spray nozzle apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897007A (en) * 1973-09-10 1975-07-29 Joseph G Roy Apparatus for atomizing liquid fuels for the combustion process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 257, (M-513)[2313], 3 septembre 1986; & JP-A-61 083 817 (BABCOCK HITACHI K.K.) 28-04-1986 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111224U1 (de) * 1991-09-10 1993-01-21 Siemens AG, 8000 München Dampfbetriebene Zerstäuberdüse, insbesondere für zähflüssige Suspensionen und Lösungen
WO2020012043A1 (es) 2018-07-09 2020-01-16 Soriano Azorin Juan Jose Sistema de formación y emisión de fluidos en forma de gel por medio de una lanza con dispositivo venturi

Also Published As

Publication number Publication date
FI911566L (fi) 1991-10-03
FI98406C (fi) 1997-06-10
DE69100493T2 (de) 1994-02-17
FR2660215B1 (fr) 1995-07-21
FI911566A0 (fi) 1991-04-02
US5188296A (en) 1993-02-23
FR2660215A1 (fr) 1991-10-04
FI98406B (fi) 1997-02-28
DE69100493D1 (de) 1993-11-18
ES2046867T3 (es) 1994-02-01
EP0451046B1 (de) 1993-10-13

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