FR2577659A1 - Burner with two coaxial reaction media feed lines - Google Patents

Abstract

The burner has two supply lines, an igniter, and a temp. measuring point. The lines pref. run coaxially. Above the outlet (10) from the inner one (1) there is a coiled conical cage (12) with spaces between adjoining windings. A rod (14) accommodating the temp. measuring point (15) runs coaxially with the cage and is supported by the cag apex portion (13). The cage windings form a heater. Pref. they compreise a comprise a protective casing (11) housing an insulated electrically heated wire (16) with PTC end. At least one temp sensor is in the rod's front end section.

Description

"Burner comprising two concentric supply lines
mentation of fluids to be reacted, in particular gas
H2 and 02 or the like. "
The invention relates to a burner with
two fluid supply lines to be brought
in reaction, as well as with an ignition and a point of
temperature measurement, supply lines
tion being preferably concentric.

When bringing in contact two or more
fluids to get a chemical reaction, that
either to produce heat energy or to make a special chemical combination, you must always
days guarantee ignition on. Particular attention should be paid to this when it comes to
for fluids of gases N and 0 and that in gas N
traces of deuterium and / or of
tritium which allow to detect this gas in a p. rock
above analysis
The problem posed to the invention consists in
ensure for a burner of the aforementioned type; ; safe ignition,
making sure that bringing them into contact with fluids
which must react, as well as their combustion, takes place
slow as regularly as possible and in the absence
incidents (explosive mixture).

This problem is solved in accordance with the in
vention in that a conical cage, rolled up in the form of
spiral, is fixed beyond the outlet of the
internal supply pipe, the turns of this conical cage being at a certain distance from each other, a bar containing the temperature measurement point, being arranged along the axis of the conical cage, this bar being held by the tip of the conical cage and the turns of the conical cage ensuring heating.

 The turns of the conical cage are made up of a protective envelope inside which is housed an electric heating wire with an insulated cold end.

 In the bar at least one temperature probe is brought up to the frontal lateral zone.

 The fluid brought into the internal supply line passes between the turns of the conical cage and meets the other fluids which exit from an orifice in the form of an annular slot in the second supply line.

 The particular advantages of the invention reside in that practically an ignition wire cage is formed which is placed in a zone of gas to be reduced while the conical shape of the spiral cage ensures an almost uniform permeability for the gas. . The particular configuration of the temperature sensor and its central arrangement also ensure sufficient measurement accuracy, which guarantees high ignition security. Furthermore, the electric voltage applied to the heating wire does not cause any alteration to the structure of the burner.

 The invention will be explained in more detail below with reference to an exemplary embodiment shown in the. single figure attached.

This figure shows in section a burner device which is used for the combustion of
H2 (D2, HT) to form water. In principle, the noiser consists of an internal supply pipe 1 for the gas H2 as well as an external supply pipe 2, arranged concentrically with the internal pipe for the gas or.

 The external supply pipe 2 is constituted by a plate 4 in which is formed a recess 3 which is in communication, via a circular orifice 5 in the wall 6 of the burner, with the reaction chamber 7e La plate 4 is tightly screwed onto the wall 6 of the burner.

The internal supply pipe 1 is located concentrically in the recess 3, and its front front end 92 which serves as an outlet orifice 10 for the N gas and which is disposed in the center of the opening 5, projects beyond this opening 5 in the reaction chamber 7. The internal supply pipe 1 is itself also tightly screwed onto the plate 4. The opening 5 thus takes the form of an annular slot.

 Beyond the outlet orifice 10 of the internal supply pipe 1, rises a conical cage 12 made in the form of a spiral, and the turns of which are at an optimizable distance from each other.

 These turns terminate in a final winding 13 of constant cross section, and they turn the front end of a bar 14 which they maintain concentrically inside the internal supply pipe 1 (on the axis 17 of the conical cage). Inside this bar 14 there is at least one temperature measurement probe 15 thanks to which the temperature existing at the anterior point of the bar 14 can be indicated. The lower end of the bar 14 is tightly fixed on the internal supply pipe 1.

 The turns of the conical cage 12 consist of a protective envelope 11 made of a material resistant to corrosion and to heat, an envelope in which a heating wire 16 is placed with its cold end electrically insulated with respect to the envelope protective 11. The supply of heating wire 16 to the turns of the conical cage 12 takes place a. inside the wall of the internal supply pipe 1.

 The anterior end of the bar can end with the end winding 13 or else (as shown) project beyond into the reaction chamber 7. The distance between them of the turns of the conical cage 12 can be optimized so that the gas N passing through these turns mixes and burns homogeneously with the gas 2 coming from the orifice 5 in the form of an annular slot.

Claims (4)

 1.-Burner with two supply pipes for the fluids to be brought in reaction, as well as with an ignition and a temperature measurement point, the supply pipes being preferably concentric, burner characterized in that a conical cage (12) wound in the form of a spiral, is fixed beyond the outlet orifice (10) of the internal supply pipe (1), the turns of this conical cage being at a certain distance from each other others, a bar (14), containing the point of measurement (15) of the temperature, being arranged along the axis (17) of the cage. conical, this bar (14) being held by the tip (13) of the conical cage (12), and the turns of the conical cage (12) providing heating.  2.-burner according to claim 1, characterized in that the turns of the conical cage (12) consist of a protective envelope (11) i inside which is housed an electric heating wire (16) with one end cold isolated.  3. according to any one of claims 1 or 29 characterized in that, in the bar (14), at least one temperature probe (15) is brought to the front lateral zone.  4.-Burner according to any one of the resales. cations 1 a aracera. se in that the fluid brought into the internal supply line (1) passes between the turns of the conical cage (12) and meets the other fluids which exit from an orifice in the form of an annular slot (5) of the second supply line.