CZ233493A3 - Method of exhausting gas from a combustion apparatus and a combustion apparatus for making the same - Google Patents

Abstract

The apparatus comprises an atmospheric burner (10), a combustion chamber (11), and means (13) for creating a vacuum within the combustion chamber. The burner comprises gas outflow nozzles (17), intake and mixing conduits (18) coaxial with the nozzles (17), and diffusers (19,20) in communication with the conduits (18) to deliver the gas/primary air mixture into the combustion chamber (11). To provide optimum smooth combustion, a box-type structure (23), which is substantially closed and communicated to the combustion chamber (11), is arranged to enclose the intake and mixing conduits (18) and includes a wall (24) disposed crosswise between the nozzles and the conduits which has, for each nozzle, an opening (25) for drawing primary air (AP) into the conduits, and openings (26) for introducing secondary air (AS) adjacent to the primary air opening. The streams of primary air (AP) and secondary air (AS) through their respective openings flow in substantially parallel directions. <IMAGE>

Description

Technology - 2-3 34-

< -O X Xl < > o> Γ “' WHAT 3 O what. ; σζ —1 of: - < WHAT > :> < σ O C5 oc O O σ • C / X ro -and < m it. O cc < zc what O cc

The combustion apparatus for adjusting and method of supplying gas to such an apparatus, the use of burners of the atmospheric type and &lt;

In ', Ί-, Ί Tr ’/ u i i i i..... R r r r r r r aci ho ho ho ho ho ho ho ho ho ho ho ho p p ho ho ho ho A boiler of this type consists essentially of an atmospheric burner, i.e. a Bunsen burner, a combustion chamber, a heat exchanger and a fan or other device that generates a vacuum in the combustion chamber. Combustion air is supplied through apertures formed in the apparatus, usually a burner. A suitable burner for such use is disclosed in Italian patent application No. 40099-A / 90 filed by Worgas s.r.l. July 6, 1990. A portion of the combustion air, the so-called primary air, is drawn into the burner and mixed with the gas injected at velocities specially provided by the supply nozzles. The resulting gas / primary air mixture, in which the percentage of air can vary between 6 ° C and more than 100¾ stoichiometric amounts required for combustion according to the type of gas and burner design, is led from the supply and mixing channels, respectively, high,

3. if the small area where it is located is described, for example, uciatori

The float chambers from the exchanger flow through a mixture which has an epia and is opa

Ξ · -3..ι '3' j ~ i <3V. i.e

In addition, the so-called 3 ' 3 &apos; J17 o. &Apos; perfectly extends into the combustion chamber separated from the primary air.

In some cases, and in particular for burners, in which the amount of primary air is substantially equal to or greater than the stoichiometric amount required for combustion and therefore the amount of secondary air supplied to the combustion chamber is; It has also been found that the lack of homogeneity is more apparent as the feed to the burner is reduced in order to limit its large use, in particular e-i. heating hot water for hygienic use.

create conditions for incomplete combustion>

? pelný

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for supplying gas to a gas fired combustion apparatus which operates using an atmospheric burner to prevent or substantially reduce erroneous combustion homogeneity affecting conventional combustion methods.

It is a further object of the invention to provide a device for carrying out this method of simple construction.

These objects are achieved by the method and apparatus set forth in the first to third claims of the appended claims.

Clarification of the figures in the drawings

Two exemplary embodiments of the invention in the accompanying drawings, in which FIG.

Fig. 2 is an enlarged perspective view of a portion of the device of Fig. 1 including an atmospheric burner; Fig. 3 shows schematically a cross-section of a device according to another embodiment of the invention.

The apparatus shown in FIG. 1 consists of an atmospheric burner

Chamber 14.

The nozzle consists, as it is more transparent, of channel 1, parallel to channel 15. To each nozzle 17 is associated a metal channel 18, in the form of a diffuser, which is located by its inlet channel at a predetermined distance. from the nozzle and, in this case coaxially with the nozzle 17 for feeding primary air and mixing the connecting channel 18 'a gas /' in September diíuzérového primary member 19 having the narrower via its ^J o sk EXAMPLE newly well bore of adu * 5.

The dimensions of the divider and apertures 25, and more generally, the design parameters so formed, are to be arranged so that the primary air is ventilated with the gas in different depending on individual requirements and / or learning power, from substantially the same values to the amount of stoichiometric θ ' for combustion of 50 - 60¾.

piynu to pr

The diffusers 18, their pi and the diffusers 19 are as is; similar sets placed and ε perforated sides of diffusers decent spo.

i rn Á j> j o o q ý ':

^<T Edie .9 umíst.ěnýrn:

pcs. r.a, ly

to create a horizontal bed from which to flame.

In the apparatus described in the foregoing and commonly provided, for example in the apparatus described in said Italian patent application, a metal sheet wall is formed between the nozzles and diffusers transversely to the axis of the diffusers, which is permanently apertured at each location.

and causing air, primary air, to be drawn into and mixed with the diffuser. The combustion, i.e. the secondary device, which is free, then feeds the diffuser openings

generated by a fan and fed to the incinerator. between adjacent assemblies, including diffusers,; and other diffusers.

On the other hand, the primary air of the invention remains the impedance of the secondary air is the chamber 11 in the flow, which will be

unchanged, f ή h r. p H supply channels 18. substantially parallel to the primary air flow through these openings.

A practical way of doing this is illustrated in Figures 1 and 2. According to the invention, the lower portion of the burner 1.0. 2, with the part removed having the edges parallel to the walls of the combustion chamber 11 and comprising

24, having in addition to the primary air apertures 25 similar to those described in the prior art, apertures 26 adjacent apertures 25. These additional apertures 26 are located outside the region facing the inlet apertures of the diffusers 16 but in any case near the area where shows an inlet effect on the gas streams exiting the nozzles 17 and the accompanying air inlet to the diffusers. Thus, only secondary air can be drawn into the combustion chamber through these additional openings. Primary air ΆΡ and secondary air streams

Γ.Ρ i 3.Λ.

marked in the picture. arrows:

they enter the box construction in the usual routine: wiring.

In the embodiment shown in Fig. 3, wherein like parts of Fig. 1 are designated with the same reference numerals, each of which are adjacent to each other and associated with a common diffuser 19 '. The gas inlet duct 15 having a triangular cross-section here has two nozzle sets 17, 17b

The jets are positioned so that the axes of the lessons are offset downwards, parallel to the axes of their respective diffusers, but wet, so that their axes are clamped with the axes

Construction details and advantages of this type are p;

Patent Application 19294-Ά / 87 filed by Worgas Sruc

The box structure 23 'comprises all adjacent burner assemblies and is positioned with its edges aligned with the side walls of the combustion chamber 11. This structure is arranged to have a wall inclined at an angle laid to the inlet openings of the diffusers 18a, 18b and their corresponding nozzles 17a , 17b. Two portions 25a, 25b face-to-face with respect to the inlet openings of the dies 15a, 13b and the openings 25a. 25b of the secondary air approach the primary air apertures, similar to FIGS. 1 and 2.

> opsano in joint;

her

In this embodiment, the streams of primary air βa, βb and secondary air ASa, ftSb flowing through the apertures in the inclined wall portions 24a, 24b are, of course, parallel to each other.

The benefits of the present invention, in addition to the extremely simple design, have shown highly advantageous features in homogeneous combustion.

In order for the device to be of such size exactly that the velocity of the creatures 25 should have an air of sufficient air to ensure complete combustion of the gas under all conditions. The vacuum inside the combustion chamber shall be taken into account when determining this size. In the case of a device in which a vacuum is reached by a fan, the flow rate of the secondary air can be easily controlled by appropriately determining the dimensions of the orifices 26 with predetermined relatively low vacuum levels which can be achieved for example using smoke channels. The air flow may be insufficient for the desired secondary air flow rate. In this case, they may be. for holes of desired speed usually additional holes are formed in the other walls of the box structure.

Although only two embodiments of the invention have been described and illustrated, it is understood that many variations and modifications are possible within the scope of the invention. For example, to meet certain design and functional requirements, both the primary air or secondary air apertures may have a non-circular shape and, most importantly, the design of the apparatus may be quite different from that shown, provided that the main features defined in the appended claims remain.

2. 3 -3 4 - 5 3 t / ο. Qe 2. 3 3

Claims (3)

claim A method for supplying gas to an incineration apparatus comprising an atmospheric burner (10), wherein a stream of gaseous fuel is mixed with a stream of primary air (AP) in a supply duct (18) and the resulting mixture is fed through a nozzle (19, 20 '). characterized in that the secondary air (Ao) extends at least in part towards the combustion chamber (ii) in a flow which is substantially parallel to the primary air flow (AP) in proximity · 2. A process according to claim 1, wherein the mixture is mixed with the gas in an amount that is required for stoichiometric gas combustion. air pressure (AP) and equal to the quantity Spclot * c ~ ' Atmospheric-type gas firing apparatus, combustion to produce a vacuum in a combustion chamber, wherein the burner (10) of the outflow gas nozzles (17) correspond to and mixing channels (18) with inlets facing the respective nozzles and from a series of diffusers (19,20). ) connected to channels remaining from the burner (10) -y (11) and the means (18) through which the gas / primary air mixture drives the chamber (11), characterized in that it further comprises a structure ( 23), which is aligned with the walls of the combustion chamber (11) and which surrounds the supply and mixing ducts (18) and between the nozzles a wall lying transversely to the axes also at the location of each primary air nozzle (AP) into the opening (25) of the primary model (17), and the channels (18) have channels (18) formed therein, the wall having (17) an entrance dedicated to it (AP), an opening (25) for it. 3. N E U S O R E 3. E N O £ About t '-VO v ·'? 0 ''> ^{1 1} • dst: Substantially outside the area opposite the inlet opening of the duct, the dimensional parameters of the air (AP) are mixed markedly are selected so that the gas flow rate is at least 0. ϊϊίηοΞ ^ ί. knows HOnnovariéniu ηγό st & cni cΠΘt.nickó gas combustion. An apparatus as claimed in claim 3 or 4, characterized in that the nozzles (17a, 17b) are arranged in two aligned nozzle assemblies, with the nozzle axes of one assembly at an angle to the nozzle axes of the other assembly and the supply and mixing nozzles. The guide is heated at the same angle as the nozzle axes in both assemblies and provided with AS d j