Classifications

• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62C—FIRE-FIGHTING
  • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
  • A62C4/04—Flame traps allowing passage of gas but not of flame or explosion wave in flues or chimneys
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J15/00—Arrangements of devices for treating smoke or fumes
  • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
• • 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 
  • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
  • F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J15/00—Arrangements of devices for treating smoke or fumes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J15/00—Arrangements of devices for treating smoke or fumes
  • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
  • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
  • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
  • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
  • F23M9/003—Baffles or deflectors for air or combustion products; Flame shields in flue gas ducts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
  • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
  • F23M9/06—Baffles or deflectors for air or combustion products; Flame shields in fire-boxes

Definitions

• the present invention relates to a plant for the production and treatment of fumes.
• It relates more particularly to a plant for the production and treatment of fumes of the type comprising at least:
• a fume generator comprising at least one burner, a combustion chamber comprising at least one zone, called the combustion chamber, in which the flame of the burner is able to extend, and an outlet for evacuation of fumes from said chamber;
• a chamber for confining the fumes produced by the smoke generator comprising an inlet connected to the flue gas exhaust outlet of the combustion chamber and an outlet connected to the flue gas generator by a flue gas recirculation circuit; outlet in the combustion chamber of the flue gas generator of said recirculation circuit being called smoke feed head.
• Such installations are well known to those skilled in this art as illustrated by patent applications FR 2 961 291, FR2291454 and US20090060779.
• yields are low and fuel consumption remains high.
• An object of the present invention is therefore to provide an installation of the aforementioned type whose design increases the efficiency and reduce the fuel consumption of the burner.
• the subject of the invention is a plant for the production and treatment of fumes of the type comprising at least:
• a smoke generator comprising at least one burner equipped with a nozzle, a combustion chamber comprising at least one zone, called a combustion chamber, combustion, in which the flame of the burner is able to extend, and a discharge outlet of the fumes of said chamber,
• a chamber for confining the fumes produced by the smoke generator comprising an inlet connected to the flue gas exhaust outlet of the combustion chamber and an outlet connected to the flue gas generator by a flue gas recirculation circuit; outlet in the combustion chamber of the flue gas generator of said recirculation circuit being called a fume supply head,
• said combustion chamber comprises a so-called flame shield screen for protecting the supply head, the burner flame, this shield for protecting the supply head, the burner flame being interposed between the combustion chamber and the smoke supply head, in that the entry of the fumes into the confinement enclosure is disposed in the upper third, preferably in the upper quarter, of said enclosure and in that the enclosure containment, in addition to its output connected to the smoke generator, a closable outlet opening / closing condensate outlet controlled according to the level of the condensates inside the enclosure, said outlet being disposed in the lower part of the containment,
• the fume supply head is at least partially made of iron, and is situated on the side of the nozzle opposite the burner.
• Such an installation has a high efficiency, does not harm visually or physically to the environment with flue gas and saves fuel because of chemical reactions taking place inside said installation.
• the nozzle preferably of cylindrical shape, which extends the burner can guide the flame, in particular in the direction of the feed head.
• the feed head is thus located at the free end of the nozzle, preferably in the axis of the nozzle, which makes it possible to heat the ferric head.
• This ferric head forms an endothermic reactor which makes it possible to generate a Fischer-Tropsch type recombination reaction with the recirculated fumes, the burner flame and the iron of the feed head.
• the fumes are returned by the recirculation circuit in the hottest part of the flame of the burner guided by the nozzle.
• Fischer-Tropsch effect the unburned carbon is recombined with hydrogen by means of the ferric catalyst formed by the feed head, and the thus recombined hydrocarbon is burned by the burner flame.
• the nozzle is located between the burner and the ferric feed head so that the recirculated fumes emerge in the axis of the flame, especially in the blue part, that is to say the warmer part , of the flame.
• the volume of the containment chamber is at least equal to the admissible air intake volume by the burner for one hour.
• the fumes are reinjected at the burner focal point, that is to say in the flame of the burner downstream of the fresh air inlet and not in the fresh air inlet as it is the case with known solutions of the state of the art.
• the fumes are lightly charged because the inlet of fresh air is unpolluted and said light fumes are burnt in the flame of the burner.
• the solution according to the invention thus makes it possible to obtain a reduction in fuel consumption of the order of 15%.
• the flue gases are recirculated by being returned to the level of the fresh air inlet of the burner, so that the incoming air is polluted and what degrades the efficiency of the installation.
• the recirculated fumes are also sent to the fresh air of the burner which causes the smothering of the burner.
• the containment chamber is free of a chimney which remains open to the open air.
• the confinement enclosure has no duct opening into the first third of the confinement enclosure, that is to say in the zone intended to contain the condensates resulting from the flue gases.
• the volume of the containment chamber is at least equal to the volume of air admitted by the burner.
• the containment chamber is devoid of flue gas opening into the first third of the containment.
• the protective screen is made of a refractory material.
• the protective shield extends into said combustion chamber, opposite the burner head formed by the injection zone of an oxidant / fuel mixture of the burner into said combustion chamber and corresponding to the base of the burner. the flame.
• the protective screen has the shape of a bent plate at least partially surrounding the feed head, this feed head in the form of a duct provided over at least a portion of its length with a plurality of holes oriented to direct the flow of smoke towards the screen.
• the plate is bent around an axis substantially perpendicular to the axis of the flame of the burner.
• the feed head is formed at the level of the combustion chamber of a first conduit which opens into a second conduit extending perpendicularly to the first conduit, the second conduit being a conduit with holes and extending around an axis substantially perpendicular to the axis of the flame of the burner.
• the volume of the confinement chamber expressed in m 3 is substantially equal to the burner flow rate expressed in m 3 / h.
• the volume of the containment is equal to 15 m 3 .
• the sum of the areas of the holes of the feed head is equal to the cross section of the conduit of said feed head to avoid overpressure.
• the feed head disposed in the thermal radiation zone of the screen, is spaced from the screen by a distance at most equal to 20 cm.
• the screen is spaced from the burner injection zone by a distance not greater than 20 cm.
• the protective screen is spaced from the top of the flame by a distance of at most 10 cm.
• the combustion chamber communicates with the entry of the confinement enclosure via a circulation circuit comprising at least one baffle.
• the flue gas recirculation circuit extends over at least part of its length inside the flue gas circulation circuit from the combustion chamber to the confinement enclosure, in order to reduce the space requirement. all.
• the zone in which the recirculation circuit extends inside the circulation circuit is arranged on the supply head side of said circuit to allow a warming of the recirculating fumes in contact with the fumes discharged from the combustion chamber.
• the inlet of the containment enclosure is equipped with a closure valve closing said inlet in the extinguished state of the burner flame, said valve being kept closed under the effect of its own weight.
• Said valve is able to pass from the closed position to the open position under the effect of the pressure generated inside the flue gas circulation circuit by the burner.
• the containment chamber is a semi-buried enclosure. Again, this arrangement facilitates the production of condensates.
• FIG. 1 shows a schematic view of an installation according to the invention
• FIG. 2 represents a simplified perspective view of the feed head and the screen positioned opposite the burner flame
• Figure 3 shows a schematic sectional view of Figure 2;
• Figure 4 shows a schematic top view of the feed head and the screen.
• the installation object of the invention is more particularly intended to allow the production of fumes and the treatment of these fumes to limit the discharge of these fumes into the environment with a good combustion efficiency. and reduced fuel consumption.
• This installation therefore comprises a generator 1 of fumes, such as a boiler.
• This fume generator 1 comprises a burner 2 capable of mixing a fuel, such as fuel, and an oxidant, such as air, in proportions chosen according to the combustion to be operated.
• This burner 2 is disposed at least partially within a combustion chamber 3.
• the injection zone of the fuel / oxidant mixture called the burner head, is disposed in a combustion chamber 3 also forming part of the smoke generator 1.
• the part of the combustion chamber 3 in which the flame of the burner extends is called the hearth 31 of the combustion chamber.
• This fireplace can be formed by means of a pot, called burn pot or nozzle, whose bottom is formed by the injection head of the burner.
• Part of the combustion chamber extends beyond the combustion chamber.
• the peripheral side wall of the combustion chamber extends around the peripheral side wall of the pot.
• the tubular body thus formed houses at one end the pot and is closed at its other end by a wall through which protrudes the supply head which will be described below.
• This combustion chamber 3 has an outlet 32 for evacuating flue gas which is connected by a flue gas circuit to a confinement chamber 4, in particular at the inlet 41 of said containment enclosure 4.
• This exhaust outlet 32 is formed by the space left free at one end of the tubular body of the combustion chamber between the peripheral side wall of the chamber and the peripheral side wall of the burn pot.
• This containment chamber 4 comprises a first outlet 42 flue gas connected by a recirculation circuit at the end of the combustion chamber opposite that provided with the burner. It should be noted that the containment enclosure is generally a semi-buried enclosure to create a temperature differential with the outside and to facilitate the cooling of the fumes with a view to their condensation.
• This containment chamber is equipped, at its entry into the enclosure, a valve. This valve 1 1 which closes the inlet 41 of the containment in the extinguished state of the burner flame, is kept closed under the effect of its own weight. This valve opens once the burner is lit.
• This containment chamber 4 further comprises means for evacuating an overpressure inside the enclosure. These overpressure means can be formed by a simple valve.
• This containment chamber also comprises means for measuring the pressure inside the enclosure to extinguish the burner if necessary.
• This containment chamber further comprises a second outlet 43 for discharging the condensates out of said enclosure.
• the inlet 41 of the flue gases is disposed in the first upper quarter of the containment chamber as shown in FIG. 1, whereas the outlet 43 for condensate discharge is disposed in the lower part of the enclosure. containment.
• the non-condensed portion of the fumes exits the containment chamber in the upper part of the enclosure through the flue gas outlet 42 and reaches via a circuit, called the recirculation circuit 5, into the combustion chamber 3 at a location the opposite chamber to the one equipped with the burner.
• the outlet of the circuit in the chamber is called the smoke feed head 6 of the combustion chamber 3. This head 6 is made at least partially of iron for the reasons explained below.
• the combustion chamber 3 further comprises a screen 7 made of a refractory material, such as a ceramic, which separates the hearth 31 from the combustion chamber corresponding to the location occupied by the burner flame, the feed head 6 in smoke.
• a screen 7 made of a refractory material, such as a ceramic, which separates the hearth 31 from the combustion chamber corresponding to the location occupied by the burner flame, the feed head 6 in smoke.
• the protection screen 7 extends facing the head 22 of the burner 2 formed by the injection zone of an oxidant / fuel mixture of the burner 2 in said combustion chamber 3 and corresponding to the base of the flame.
• the combustion chamber 3 has the shape of a tubular body as in the example shown with the injection zone of the burner disposed at the end of said body and the feed head disposed at the end.
• the screen 7 extends inside the chamber between said ends. In particular the screen 7 extends between the smoke feed head and the nozzle which extend the burner.
• the protection screen 7 has the shape of a bent plate at least partially surrounding the feed head 6, this feed head 6 being in the form of a conduit provided over at least a part of its length. a plurality of holes 61 oriented to direct the flow of smoke towards the screen 7.
• the plate is bent around an axis substantially perpendicular to the axis of the flame of the burner. Similarly, at least a portion of the duct of the diffuser function feed head extends substantially perpendicular to the longitudinal axis of the flame.
• the feed head 6, disposed in the heat radiation zone of the screen 7, is spaced from the screen by a distance at most equal to 20 cm.
• the screen 7 is spaced from the injection zone of the burner 2 by a distance at most equal to 20 cm. When the burner 2 is on, the protective screen 7 is separated from the top of the flame by a distance of at most 10 cm.
• the screen therefore has a so-called hot surface facing the burner flame which rises in temperature when the burner is operating, this surface being licked or subjected to the action of the heat released by the burner flame.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Public Health (AREA)
• Health & Medical Sciences (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Combustion Of Fluid Fuel (AREA)
• Air Supply (AREA)
• Chimneys And Flues (AREA)
• Incineration Of Waste (AREA)
• Chemical And Physical Treatments For Wood And The Like (AREA)
• Respiratory Apparatuses And Protective Means (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48225010

Family Applications (1)

Country Status (7)

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• 2013
  • 2013-02-12 FR FR1351153A patent/FR3002024B1/fr not_active Expired - Fee Related
• 2014
  • 2014-02-12 CA CA2899681A patent/CA2899681A1/fr not_active Abandoned
  • 2014-02-12 WO PCT/FR2014/050271 patent/WO2014125210A2/fr active Application Filing
  • 2014-02-12 JP JP2015556558A patent/JP2016511385A/ja active Pending
  • 2014-02-12 EP EP14708624.3A patent/EP2956716A2/fr not_active Withdrawn
  • 2014-02-12 CN CN201480008596.8A patent/CN105026835A/zh active Pending
  • 2014-02-12 US US14/767,101 patent/US20160030783A1/en not_active Abandoned

Non-Patent Citations (2)

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