EP0069637A2 - Verfahren und Vorrichtung zum Pulverisieren eines festen Brennstoffes - Google Patents

Verfahren und Vorrichtung zum Pulverisieren eines festen Brennstoffes Download PDF

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Publication number
EP0069637A2
EP0069637A2 EP82401176A EP82401176A EP0069637A2 EP 0069637 A2 EP0069637 A2 EP 0069637A2 EP 82401176 A EP82401176 A EP 82401176A EP 82401176 A EP82401176 A EP 82401176A EP 0069637 A2 EP0069637 A2 EP 0069637A2
Authority
EP
European Patent Office
Prior art keywords
die
jet
axis
gas
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.)
Ceased
Application number
EP82401176A
Other languages
English (en)
French (fr)
Other versions
EP0069637A3 (de
Inventor
Roland Kissel
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.)
Creusot Loire SA
Original Assignee
Creusot Loire 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 Creusot Loire SA filed Critical Creusot Loire SA
Publication of EP0069637A2 publication Critical patent/EP0069637A2/de
Publication of EP0069637A3 publication Critical patent/EP0069637A3/de
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/50—Fuel charging devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2200/00—Details of gasification apparatus
    • C10J2200/15—Details of feeding means
    • C10J2200/158—Screws

Definitions

  • the subject of the invention is a method and a device for spraying a solid combustible material introduced inside an enclosure by means of a screw conveyor.
  • the invention is particularly applicable to the introduction of divided solid fuels into a reaction chamber for combustion or gasification, the chamber being or not under pressure.
  • the rod introduced is very compact and it is necessary to disaggregate it in order to carry out combustion or gasification.
  • the rod is very compact, it is not certain, with such a method, to carry out a real atomization of the fuel, the rod being able to break into pieces of a certain importance.
  • the subject of the invention is a method and a device making it possible to remedy these drawbacks by ensuring, even for a relatively low flow of gas, perfect spraying of the fuel introduced.
  • a gas is injected into the jet axis of each die from the interior of the screw conveyor, each gas jet which has a sufficient pulse to substantially form a cone centered on the axis of compressed material by widening inside the latter, each rod being made up of a hollow tube whose internal wall crumbles during its advancement in the die and takes the form of the jet by releasing particles which are sucked into the jet and introduced with it into the 'pregnant.
  • the origin of the jet and its pulse are determined so that the cone formed reaches a diameter of the order of that of the outlet orifice of the die, in the plane of the latter.
  • FIG 1 there is shown by way of example an enclosure bounded by a wall 1 inside which is introduced a rod of combustible material by means of a screw conveyor consisting of a sheath 2 to the inside which a screw 3 is driven by a motor, by means of a reduction gear 4.
  • the rotation of the screw causes a entrainment .of the combustible material introduced by a hopper 5 supplied with fuel, the latter being brought for example pneumatically or hydraulically.
  • the sheath 2 is provided with a convergent 7 which directs the material entrained by the screw 3 towards a die 8 opening out inside the enclosure 1. If the operating characteristics of the conveyor are correctly chosen screw, this forms by extrusion inside the fi lière 8 a rod of compressed material 9 which is introduced continuously into the enclosure 1.
  • the shaft of the screw 3 is pierced with an axial bore 13 in which is formed a pipe 11 which opens at the end of the screw by an injection nozzle 12.
  • FIG. 2 which is an enlarged view of the end of the screw and of the die 8, it can be seen that the pipe 11 can consist of a tube threaded into the axial bore 13 of the shaft of the screw 3 and which ends with the nozzle 12 the latter being placed in the extension of the conical point 14 placed at the end of the shaft 3 of the screw and penetrating into the conical convergent 7.
  • the pipe 11 If the pipe 11 is driven in rotation-with the shaft 3 of the screw, it is necessary to supply it by means of a rotary joint 20 of known type. But the pipe 11 can also be blocked in rotation, the shaft 3 rotating around it.
  • a gas jet 16 is thus injected inside the tube 9 of compressed material which passes through the tube in the axis of the latter before opening out inside the enclosure 1.
  • a gaseous jet of strong impulse always takes substantially the shape of a cone whose apex is placed at the center of the injection nozzle and whose half-angle at the apex A is of the order of 11 °.
  • the pulse of the jet so that at the outlet of the nozzle 12, it has a speed between 50 m / s and the speed of sound.
  • the jet is in the form of a cone which widens starting from the center of the nozzle 12.
  • the tube 9 then consists of a hollow tube crossed in its axis by the jet 16 and by consequent whose internal wall takes the form of the jet. Indeed, if the impulse is sufficient, the jet retains its geometric characteristics inside the tube, the internal wall of the latter being disintegrated during its advancement and taking the form of the jet.
  • the process of crumbling the bcudin is particularly effective at the outlet of the die if the position of the ⁇ use 12 is chosen so that, in the plane of the outlet orifice 17 of the die, the jet 16 is widened until reaching a diameter of the order of that of the orifice outlet 17.
  • the flange 9 which advances continuously towards the inside of the enclosure has, in the outlet orifice 17, a small thickness and therefore crumbles easily.
  • a jet of strong impulse sucks the gases which surround it and it therefore occurs on the periphery of the jet of gas streams directed according to the arrows 18 and having a relatively high speed, of the order 3 m / s.
  • the distance (L) from the nozzle to the outlet face of the die can then be of the order of 1.5 times the diameter (d) of the latter.
  • the distance L from the nozzle to the outlet face of the die is of the order of 2.5 times the diameter (d) of the outlet orifice.
  • a device can be used to adjust the position of the injection nozzle 12 inside the die 16, so as to modify the thickness of the wall of the tube. This will be the case in particular if the nature of the fuel is changed, the fatty coals running the risk, for example, of forming very compact rolls then the dry coals are more easily broken up.
  • the pipeline 11 can be slidably mounted along the bore 13 of the shaft of the screw, the latter being provided with a device 28, for example. with screw-nut, making it possible to adjust the position of the outlet nozzle 12 by sliding the pipe 11 inside the shaft.
  • the nozzle 12 plays the role of a mandrel facilitating the formation in the die of a tubular-shaped tube.
  • This arrangement is particularly advantageous because, for the same flow rate of combustible material, the use of several dies makes it possible to reduce the thickness of the rod of compressed material and facilitates its disaggregation.
  • Figure 6 which is a section through a plane transverse to the axis of the screws, it can be seen that they are arranged so as to penetrate one into the other and distributed around an upright 21 placed in the 'axis of the sleeve 2 and whose cross section has the shape of a curvilinear triangle inscribed in the threads of the three screws. It is possible, as shown in FIGS. 7 and 8, to place an injection pipe 11 inside the central upright 21.
  • the nozzle 12 was supplied by an axial pipe 11. This arrangement is advantageous because it allows the die 8 to be released, but one could also adapt the arrangement shown in Figures 8 and 9.
  • the nozzle 12 is constituted by a short section of tube forming a nozzle formed upstream and open downstream, and held in the center of the die 8 upstream thereof, by at least one fin 24 inside which is pierced a channel 25 opening at one end into the nozzle 12 and at the other end outside of the die 8 by an orifice 26 connected to a supply pipe 27 in fluid.
  • the fins 24 are profiled so as not to hinder the progression of the material and not to hinder the formation of the flange. In addition, by inclining the fins 24, it is possible to place the nozzle 12 at least partially at the tip of the convergent 7 so as to better clear the inlet orifice of the die 23.
  • the invention implemented in the various embodiments that have been described, makes it possible to suspend the combustible material with a relatively low mass flow rate of gas, of the order of 2 to 20% by weight of the solid flow rate, the ratio from the pressure of the fluid in the injection pipe 11 to the pressure prevailing inside the enclosure being for example between 2, for a gas flow rate of 10% solid and 3 for a flow rate of 3%.
  • the injected jet must necessarily be constituted by a compressible fluid, this could however contain a certain quantity of liquid in suspension.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Disintegrating Or Milling (AREA)
EP82401176A 1981-07-03 1982-06-25 Verfahren und Vorrichtung zum Pulverisieren eines festen Brennstoffes Ceased EP0069637A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8113095A FR2509017B1 (fr) 1981-07-03 1981-07-03 Procede et dispositif de pulverisation d'une matiere combustible solide
FR8113095 1981-07-03

Publications (2)

Publication Number Publication Date
EP0069637A2 true EP0069637A2 (de) 1983-01-12
EP0069637A3 EP0069637A3 (de) 1984-04-04

Family

ID=9260157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401176A Ceased EP0069637A3 (de) 1981-07-03 1982-06-25 Verfahren und Vorrichtung zum Pulverisieren eines festen Brennstoffes

Country Status (7)

Country Link
US (1) US4783010A (de)
EP (1) EP0069637A3 (de)
JP (1) JPS5811047A (de)
BR (1) BR8203839A (de)
CA (1) CA1195553A (de)
FR (1) FR2509017B1 (de)
ZA (1) ZA824492B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611212A1 (de) * 1993-02-12 1994-08-17 Isover Saint-Gobain Einbringen von pulverartigen Zusatzstoffen in einen Ofen
FR2727744A1 (fr) * 1994-12-02 1996-06-07 Donze Michel Bruleur a materiau combustible solide et installation comprenant un tel bruleur
FR2761284A1 (fr) * 1997-03-28 1998-10-02 Michel Donze Distributeur de poudre metallique pour un chalumeau d'oxycoupage
CN109207203A (zh) * 2017-06-30 2019-01-15 神华集团有限责任公司 气化炉及其供料装置、燃烧器和固体燃料分配器

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2607431B1 (fr) * 1986-12-02 1989-03-10 Clextral Procede et installation de montage et demontage des vis d'une machine d'extrusion
CH674474A5 (de) * 1987-12-07 1990-06-15 Max Gutknecht
JPH0378910A (ja) * 1989-08-23 1991-04-04 Mitsubishi Cable Ind Ltd 難燃性高発泡電線
DE4016512A1 (de) * 1990-05-22 1991-11-28 Adelmann Gmbh Verfahren zur beseitigung von treibmitteln aus kunststoffschaeumen sowie vorrichtung hierfuer
US5383611A (en) * 1993-10-08 1995-01-24 E. I. Du Pont De Nemours And Company Direct in-line injection of particulate compositions in spraying systems
KR950027550U (ko) * 1994-03-07 1995-10-18 정의훈 클로즈 가이드(Cloth guide)의 경사안내로울러 좌. 우 이송장치
US8460550B2 (en) * 2004-04-12 2013-06-11 Thar Process, Inc. Continuous processing and solids handling in near-critical and supercritical fluids
US7722771B2 (en) * 2004-04-12 2010-05-25 Thar Technologies, Inc. Continuous processing and solids handling in near-critical and supercritical fluids
US7416404B2 (en) 2005-04-18 2008-08-26 General Electric Company Feed injector for gasification and related method
US7621473B2 (en) * 2005-11-08 2009-11-24 E. I. Du Pont De Nemours And Company Ring jet nozzle and process of using the same
DE102008035912A1 (de) * 2008-07-31 2010-02-04 Krones Ag Feststoffvergaser
CN102933695B (zh) * 2010-06-16 2014-10-29 株式会社Ihi 气化炉原料供给装置
WO2022010651A1 (en) * 2020-07-10 2022-01-13 The Government Of The United States Of America, As Represented By The Secretary Of The Navy Cooling system and fabrication method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE559070A (de) *
GB191509678A (en) * 1914-08-13 1916-03-30 Wirt Stanley Quigley Improvements in Apparatus for Feeding Pulverized or Finely Divided Fuel or other Material.
GB152300A (en) * 1919-10-08 1921-02-17 Fuller Lehigh Co Improvements relating to the conveying of pulverized material
GB526358A (en) * 1939-03-14 1940-09-17 Kyrle Willans Improvements in or relating to gas-producers
FR1061995A (fr) * 1951-05-30 1954-04-16 Basf Ag Procédé et dispositif pour la gazéification de combustibles en gros morceaux ou à grains fins
DE2116472A1 (de) * 1971-04-03 1972-10-05 Schneider, Bernhard, Dipl.-Ing., 6690 St. Wendel Betonspritzmaschine für plastischen Beton
FR2457123A1 (fr) * 1978-09-07 1980-12-19 Texaco Development Corp Extrudeuse et son utilisation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5114601A (ja) * 1974-07-25 1976-02-05 Fujitaro Satake Shataihenkeisokuteisochi
US4039691A (en) * 1975-12-31 1977-08-02 Campbell Soup Company Protein texturization by extrusion with internal steam injection
US4286935A (en) * 1979-11-08 1981-09-01 Kabushiki Kaisha Komatsu Seisakusho Earth and sand conveyor system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE559070A (de) *
GB191509678A (en) * 1914-08-13 1916-03-30 Wirt Stanley Quigley Improvements in Apparatus for Feeding Pulverized or Finely Divided Fuel or other Material.
GB152300A (en) * 1919-10-08 1921-02-17 Fuller Lehigh Co Improvements relating to the conveying of pulverized material
GB526358A (en) * 1939-03-14 1940-09-17 Kyrle Willans Improvements in or relating to gas-producers
FR1061995A (fr) * 1951-05-30 1954-04-16 Basf Ag Procédé et dispositif pour la gazéification de combustibles en gros morceaux ou à grains fins
DE2116472A1 (de) * 1971-04-03 1972-10-05 Schneider, Bernhard, Dipl.-Ing., 6690 St. Wendel Betonspritzmaschine für plastischen Beton
FR2457123A1 (fr) * 1978-09-07 1980-12-19 Texaco Development Corp Extrudeuse et son utilisation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611212A1 (de) * 1993-02-12 1994-08-17 Isover Saint-Gobain Einbringen von pulverartigen Zusatzstoffen in einen Ofen
FR2727744A1 (fr) * 1994-12-02 1996-06-07 Donze Michel Bruleur a materiau combustible solide et installation comprenant un tel bruleur
FR2761284A1 (fr) * 1997-03-28 1998-10-02 Michel Donze Distributeur de poudre metallique pour un chalumeau d'oxycoupage
WO1998043772A1 (fr) * 1997-03-28 1998-10-08 Michel Donze Distributeur de poudre metallique pour un chalumeau d'oxycoupage
CN109207203A (zh) * 2017-06-30 2019-01-15 神华集团有限责任公司 气化炉及其供料装置、燃烧器和固体燃料分配器
CN109207203B (zh) * 2017-06-30 2020-07-31 神华集团有限责任公司 气化炉及其供料装置、燃烧器和固体燃料分配器

Also Published As

Publication number Publication date
US4783010A (en) 1988-11-08
CA1195553A (fr) 1985-10-22
JPS5811047A (ja) 1983-01-21
BR8203839A (pt) 1983-06-28
FR2509017B1 (fr) 1986-04-04
EP0069637A3 (de) 1984-04-04
FR2509017A1 (fr) 1983-01-07
ZA824492B (en) 1983-04-27

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Inventor name: KISSEL, ROLAND