EP0107527A1 - Vorrichtung vom Kesseltyp in der eine Feststoffflüssigkeitssuspension vom Kohle-Wasser-Typ verwendet wird - Google Patents

Vorrichtung vom Kesseltyp in der eine Feststoffflüssigkeitssuspension vom Kohle-Wasser-Typ verwendet wird Download PDF

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Publication number
EP0107527A1
EP0107527A1 EP83401755A EP83401755A EP0107527A1 EP 0107527 A1 EP0107527 A1 EP 0107527A1 EP 83401755 A EP83401755 A EP 83401755A EP 83401755 A EP83401755 A EP 83401755A EP 0107527 A1 EP0107527 A1 EP 0107527A1
Authority
EP
European Patent Office
Prior art keywords
zone
combustion
fuel
fluid
solidification
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
EP83401755A
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English (en)
French (fr)
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EP0107527B1 (de
Inventor
Jean-Marie Pariel
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.)
Pariel Jean-Marie
Original Assignee
Elf France SA
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Filing date
Publication date
Application filed by Elf France SA filed Critical Elf France SA
Priority to AT83401755T priority Critical patent/ATE39745T1/de
Publication of EP0107527A1 publication Critical patent/EP0107527A1/de
Application granted granted Critical
Publication of EP0107527B1 publication Critical patent/EP0107527B1/de
Expired 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 
    • F23C99/00—Subject-matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
    • F22B21/341—Vertical radiation boilers with combustion in the lower part
    • F22B21/343—Vertical radiation boilers with combustion in the lower part the vertical radiation combustion chamber being connected at its upper part to a sidewards convection chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations

Definitions

  • the present invention relates to boiler-type devices making it possible to carry out the combustion of solid-liquid mixtures, for example coal-water and to recover the calories produced in the form of hot fluids under pressure.
  • the cylindrical combustion zone is equipped with a single multi-fluid type burner attached to the fixed end of the cylinder opposite the solidification zone and the axis of which coincides with that of the combustion zone.
  • a pumping system adapted to the fuel used (solid-liquid suspension) is used to introduce said fuel into the burner which also receives the auxiliary gaseous spraying fluid as well as the combustion air.
  • the injection of all the active fluids into the hearth that constitutes the combustion zone is necessarily axial.
  • the combustion zone is highly insulated by means of refractory products forming a radiant hot wall held in place by a metal casing.
  • the spraying mentioned above is carried out at an effective pressure generally between 0.5 and 2 bars.
  • the combustion zone is of elongated cylindrical shape, that is to say that its length (L) will generally be between 3.25 and 5 times the inside diameter (D) of the cylinder.
  • this zone In order to allow satisfactory evacuation of the slag which generally forms in the liquid state in this combustion zone, it will be inclined to the horizontal by an anglej, generally between 2 and 8 °. In addition, this zone will be rotated at a slow speed of the order of 1 to 5 revolutions per minute by means of a conventional roller or chain drive system.
  • This solidification zone will have a volume generally between 10 and 15 times the volume of the combustion zone. It will advantageously take the form of a rectangular parallelepided whose depth (P) will be at least equal to (L) length of the zone of combustion, a width (1) at least equal to 2.25 D and a height (H) at least equal to 5 D.
  • This solidification zone comprises on its side walls, constituted by a refractory insulating material held in place by a metallic envelope, cold tubes containing the pressurized fluid to be heated by radiation.
  • it has in its lower part a hopper for recovering the slag from the combustion zone and the ash from the solidification zone.
  • a horizontal convection zone equipped with a bundle of exchanger tubes operating by convection, and hoppers for recovering the dust present.
  • this convection zone can be arranged vertically so that the fumes flow from top to bottom, the main thing being that the gas stream is subjected to a significant change in direction.
  • the solid-liquid suspension used as fuel in the device of the invention could, for example, be a mixture of finely ground coal, that is to say the particles of which will generally have a diameter of less than 100 microns and water or any other suitable liquid such as animal or vegetable oils, alcohols or fuels.
  • the content of the mixture in liquid is preferably between 30 and 50% (weight).
  • the combustion zone (5) is supplied with solid-liquid suspension via the line (1).
  • Lines (2) and (3) lead the spray air and the combustion air respectively to the multi-fluid burner (4).
  • This burner (4) is arranged on the fixed front wall (6) of the area (5). .
  • the walls of this zone are made up of refractories (7) with a thickness of around 350 mm, held in place by the metallic outer casing (8).
  • the area (5) inclined at an angle ⁇ of 3.5 ° on the horizontal is rotated by means of a system comprising a drive roller (9) and a support roller (10) on which the raceways (11).
  • the zone (5) opens onto a solidification zone (12) of vertical axis, taking the form of a rectangular parallelepiped.
  • the inside of the walls of the zone (12) is lined with tubes (13) intended for heat exchange by radiation, said walls being made of an insulating refractory lining inside (14) of approximately 100 mm thickness maintained in placed by a metal casing (15).
  • a hopper (16) intended to collect slag and ash.
  • the walls of the hopper are constituted in a similar way to that of the heat exchange part of the zone (12).
  • the zone (12) leads to a convection zone (17) arranged perpendicular to the zone (12).
  • This zone (17) is equipped with a battery of tubes (18) intended for heat exchange by convection. (19) collect the steam-water emulsion produced by both the tubes (13) and the tubes (18) to direct it towards the separating flask (20).
  • the zone (17) is equipped at the bottom with hoppers (21) for the recovery of dust conveyed by the gas flow and possible deposits on the tubes (18), detached by means of a conventional blowing system not shown.
  • the walls of the zone (17) consist of a insulating refractory (22) with a thickness of approximately 50mm held in place by the casing (23).
  • the device of the invention described above is implemented according to the process described below with a coal-water suspension as fuel.
  • This suspension consists of a weight mixture of 40% water, 60% carbon. This carbon was finely ground in an aqueous medium so as to obtain a particle size centered on 35 microns with a maximum of 100 microns. The viscosity of the mixture is reduced by adding an appropriate surfactant.
  • the fuel is introduced by volumetric pumping into the burner, the latter being supplied separately with supercharged atomizing air at 0.7 bar effective and with combustion air.
  • the spray is injected into the axis of the combustion zone, the design of which allows the total combustion of the coal contained in the suspension within this zone itself with a combustion rate reaching 600 Thermies per m3 of combustion zone.
  • the ignition of the fuel is ensured automatically by the temperature level prevailing in the zone preheated to 1100 ° C. with conventional fuel. Therefore the temperature in steady state is of the order of 1400 ° C.
  • the thermal load is modulated as required by direct action on the volumetric supply pump. The flexibility thus obtained allows an instantaneous variation of the calorific flow in the proportions of 1/5 to 5/5.
  • the ash contained in the coal is in the liquid state in fine suspension in the combustion gases. A fraction of these particles is deposited in contact with the refractory walls on which they flow by gravity. Their evacuation is ensured by the conjunction of the inclination of the zone on the horizontal and its slow rotation.
  • the possible concretions which can form on the walls are also eliminated as they are detached. The latter results in particular from the non-stick nature of the wall vis-à-vis the slag.
  • the hot gases (around 1400 ° C) produced in the combustion zone penetrate into the solidification zone.
  • the gases in this zone cool down by radiation towards the cold walls lined with tubes, which automatically causes the concomitant cooling of fine particles.
  • molten ash transported within the gas stream.
  • the temperature of the gas goes from 1400 to 850 ° C approximately.
  • the hopper located at the lower part of this zone receives on the one hand the molten ash and the concretions coming from the combustion zone and on the other hand those which could form on the part of the wall facing combustion, then detach.
  • the gases from the solidification zone penetrate into the convection zone where they are cooled, to a temperature of approximately 250 ° C. in contact with the bundles of exchanger tubes. In this area a fraction of the dust is deposited on the tubes from which they are expelled by a conventional blowing process.
  • Hoppers arranged at the base receive dust falling by gravity.
  • the water-vapor emulsion generated in the exchange bundles of the solidification and convection zones is collected at the top and directed towards the separator flask.
  • the gases from the convection zone are dusted in a conventional manner before being discharged to the chimney.
  • the devices of the invention are particularly advantageous because they allow the use of coals of all kinds as liquid fuel under particularly favorable operating conditions, particularly in terms of handling, ash extraction, flexibility of operation. and security.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Liquid Carbonaceous Fuels (AREA)
EP83401755A 1982-09-10 1983-09-06 Vorrichtung vom Kesseltyp in der eine Feststoffflüssigkeitssuspension vom Kohle-Wasser-Typ verwendet wird Expired EP0107527B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401755T ATE39745T1 (de) 1982-09-10 1983-09-06 Vorrichtung vom kesseltyp in der eine feststofffluessigkeitssuspension vom kohle-wasser- typ verwendet wird.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8215359 1982-09-10
FR8215359A FR2533018B1 (fr) 1982-09-10 1982-09-10 Dispositif du type chaudiere utilisant comme combustible une suspension solide-liquide du type charbon-eau

Publications (2)

Publication Number Publication Date
EP0107527A1 true EP0107527A1 (de) 1984-05-02
EP0107527B1 EP0107527B1 (de) 1989-01-04

Family

ID=9277360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401755A Expired EP0107527B1 (de) 1982-09-10 1983-09-06 Vorrichtung vom Kesseltyp in der eine Feststoffflüssigkeitssuspension vom Kohle-Wasser-Typ verwendet wird

Country Status (4)

Country Link
EP (1) EP0107527B1 (de)
AT (1) ATE39745T1 (de)
DE (1) DE3378841D1 (de)
FR (1) FR2533018B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1705383A (en) * 1924-04-17 1929-03-12 Mines De Frankenholz Soc D Combustion chamber for use with powdered fuel
GB714749A (en) * 1951-06-27 1954-09-01 Babcock & Wilcox Ltd Improvements in or relating to tubulous vapour generators
FR1339743A (fr) * 1962-10-29 1963-10-11 Combustion Eng Perfectionnements apportés aux procédés et installations pour manipuler et brûler du charbon
FR2088628A5 (de) * 1970-04-20 1972-01-07 Heurtey Sa
DE2418504A1 (de) * 1974-04-11 1975-10-30 Vorkauf Heinrich Rohrelement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1705383A (en) * 1924-04-17 1929-03-12 Mines De Frankenholz Soc D Combustion chamber for use with powdered fuel
GB714749A (en) * 1951-06-27 1954-09-01 Babcock & Wilcox Ltd Improvements in or relating to tubulous vapour generators
FR1339743A (fr) * 1962-10-29 1963-10-11 Combustion Eng Perfectionnements apportés aux procédés et installations pour manipuler et brûler du charbon
FR2088628A5 (de) * 1970-04-20 1972-01-07 Heurtey Sa
DE2418504A1 (de) * 1974-04-11 1975-10-30 Vorkauf Heinrich Rohrelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
POWER, vol. 125, no. 12, décembre 1981, Concord, New Hampshire (US) *

Also Published As

Publication number Publication date
FR2533018A1 (fr) 1984-03-16
FR2533018B1 (fr) 1985-07-19
ATE39745T1 (de) 1989-01-15
DE3378841D1 (en) 1989-02-09
EP0107527B1 (de) 1989-01-04

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