FR2547021A1 - TURBOCOMBUSTION FURNACE - Google Patents

Abstract

OVEN CHARACTERIZED BY A PRIMARY AIR SUCTION PIPE 7 OPENING TO THE EXTERIOR AT THE TOP OF THE OVEN AND EXTENDING INTO THE FIREPLACE 10 AT AN INCLINATION IN RELATION TO A VERTICAL AXIAL PLAN OF THE FIREPLACE, THE PIPE HAVING ITS FREE END 8 LOCATED A LOW DISTANCE FROM THE COMBUSTION GRILLE 3, SO AS TO SUCK A FLOW OF PRIMARY AIR THROUGH THE LOAD OF FUEL INCURRED AND EVACUATE THE COMBUSTION FUMES. AT LEAST ONE OBTURABLE ORIFICE IS STILL PROVIDED IN THE TOP OF THE FURNACE FOR THE INTRODUCTION OF SECONDARY AIR INTO THE FIREPLACE 10. THE INVENTION IS USED AS A HOME HEATING APPARATUS OR AS A BOILER FOR THE PRODUCTION OF A HOT FLUID.

Description

The present invention relates to a furnace

  perfected which ensures optimal heat output with a

  reduced fuel consumption and maintenance.

  The object of the invention is to promote the intense and complete combustion of a bulky fuel charge in a furnace so as to be able to use, with optimum efficiency, fuels consisting of raw materials not debited or conditioned, for example tarpaulins. large woods, briquettes, large bundles

of paper.

  This object is achieved thanks to the invention by a furnace characterized by at least one primary air suction pipe opening outwardly into the top of the furnace.

  and extending into the hearth with an inclination

  port to a vertical axial plane of the hearth, said pipe having its free end located at a short distance from the combustion grate so as to suck a flow of air

  primary fuel through the charged fuel charge and-

  to sweep the combustion fumes to an evacuation port

  At least one closable orifice is still provided in the top of the furnace for the introduction of air

secondary in the home.

  The furnace according to the invention has the advantages of ensuring a complete and intense combustion of the fuel with an optimal heat output for a cost of fuel

and reduced maintenance.

  The invention is explained in more detail in the following with reference to the accompanying drawings, in which: FIG. 1 is a vertical sectional view of a furnace according to the invention, in a first exemplary embodiment, FIG. 2 is a top view of the furnace of Figure 1 with cover removed, Figures 3 and 4 illustrate an alternative embodiment of the furnace shown in Figures 1 and 2;

  FIG. 5 is a vertical sectional view of a heater

  In a second exemplary embodiment of the invention, FIG. 6 is a top view of the boiler of FIG. 5, with a partially torn envelope, FIG. 7 is a vertical sectional view of FIG.

line A-A of FIG.

  Referring first to Figures 1 and 2 which illustrate a first embodiment The furnace 1 has a loading opening 2 closable by a lid (not shown), a combustion grate 3 and a

  smoke evacuation opening 4 In its upper part

  the furnace 1 has an opening

  primary air 5 equipped with an adjustable shutter valve 6.

  Port 5 provides access to an air intake pipe

  7 extending into the hearth 10 with an inclination

  at a certain angle to a vertical axial plane and this pipe extends so that its free end 8 is located at a short distance from the combustion grate 3 The free end of the air supply pipe Primary 7 is surrounded by a protective sleeve 9 Several primary air suction hoses such as

  the pipe 7 may also be provided.

  The direct aspiration of primary air into the furnace via the pipe 7 produces a circulation of air flow through the fuel charge placed in the furnace 10 as symbolized by the arrows, which causes an intense and complete combustion of the fuel. This arrangement makes it possible to use bulky wood logs or briquettes as fuel without the need to be debited. It is also possible to burn large bundles of

  paper not prepared to ensure intense heating of.

  The furnace according to the invention thus makes it possible to produce continuous heating with a relatively inexpensive raw fuel. The adjustment of the combustion and thus of the heat is carried out by means of the valve 6. One or more orifices of introduction of secondary airetel that the orifice 11 in FIG. 2, can also be

  provided to perfect the adjustment of the combustion.

  An additional advantage of the furnace according to the invention is that it ensures an effective continuous heating which leaves as a residue a small amount of ash and these must be removed after long periods of heating, which considerably reduces the maintenance: it has been found experimentally that only two or three evacuations per winter are sufficient for continuous heating. In addition, because of the circulation of the primary air flow sucked through the fuel charge, the combustion fumes are evacuated continuously without

reflux problem.

  The furnace is completed by an ashtray 12 below the combustion grate 3, with a door or a drawer 13 Advantageously the furnace body is surrounded by a

  protective coat consisting for example of a fence.

  The turbo-combustion furnace according to the invention may be embodied in various embodiments. An alternative embodiment of the furnace of FIG. 1 is illustrated in FIGS. 3 and 4 which are views similar to those of FIGS. 1 and 2. In this variant embodiment, the flue gas discharge opening 4 opens into the upper wall instead of the wall-side opening.

  as in the embodiment shown in Figures 1 and 2.

  FIGS. 5 to 7 illustrate another embodiment in which the furnace according to the invention serves as an element of

  In these drawings the same references are

  numerical references in Figure 1 refer to

  The fireplace 10 is provided here with four primary air suction pipes 7 The side walls and the upper wall of the hearth 10 form a jacket constituting a reservoir for a fluid to be heated, for example water. reservoir 20 has a fluid inlet 21 at its lower part and a fluid outlet 22 at its upper part.

  in the combustion chamber 10 heats the fluid of the reservoir.

  see 20 and the output 22 therefore releases the hot fluid.

  The flue gas discharge opening 4 opens into a flue gas box 23 having a flue gas outlet 24. The flue gas chamber 23 contains a heat recovery unit 25 which bypasses part of the fluid from the tank 20 through the flue gas box 23 that the heat of the evacuated fumes also serves to heat a quantity of fluid,

  thus increasing the efficiency of the boiler.

Claims (4)

  A furnace comprising a combustion chamber, a combustion grate and a flue outlet, characterized by at least one primary air suction pipe (7) opening out into the top of the furnace and extending into the hearth (10) with an inclination with respect to a vertical axial plane of the hearth, said pipe (7) having its free end (8) located at a short distance from the combustion grate (3) so as to suck a flow of primary air through the charged fuel charge and sweep the fumes   combustion to the flue gas outlet (4).   Furnace according to claim 1, wherein the   free air (8) of the primary air intake pipe (s)   (7) is surrounded by a protective sleeve (9).   Furnace according to claim 1 or 2, further characterized by at least one closable orifice (11) at the top of the furnace for the introduction of secondary air in the home (10).   Furnace according to any one of the claims   with an ashtray (12) made of   below the combustion grate (3).   Furnace according to any one of the claims   previous, characterized in that the wall of the hearth (10) is arranged to form a fluid reservoir (20) having a fluid inlet (21) at the bottom and an outlet of   fluid (22) at the top, and in that the orifice of   flue gas extraction (4) opens into a flue gas box (23) containing a heat recovery device (25) derived from   from the reservoir fluid (20) to the fluid outlet (22).