DE1962590U - COMBUSTION CHAMBER FOR SHAFT FURNACES OPERATING WITH GAS OR LIQUID FUEL. - Google Patents

Description

PATENT LAWYERS

PATENTANWALT MÜ LLER-BÖRNER PATENTANWALT DIPL.-ING. WEY

BERLIN 33 (DAHLEM) · PODBIELSKlALLEEiS 8 MUNICH 22 ■ WIDENMAYERSTRASSE

TELEPHONE 762907 TELEGRAMS: PROPINDUS TELEPHONE 22 55 85 TELEGRAMS: PROPINDUS

19 411

Egon S ti η gel M e r a η (Italy)

Combustion chamber for shaft furnace operated with gas or liquid fuel

The innovation relates to a combustion chamber with a cylindrical interior for shaft furnaces operated with gas or liquid fuel, in particular lime shaft kilns, at one of them. End the fuel nozzle and passages for the combustion air and possibly return gases from the shaft furnace are arranged and at the opposite end the combustion chamber, the combustion gases in the shaft furnace off or trespass.

TELEPHONE: 0184057

It is known to use return gas from the preheating zone of shaft furnaces the combustion chamber tangential and perpendicular to the chamber axis on and on. to flow along the inside wall of the chamber to to create turbulence in the chamber, and in particular in the second half of the Chamber:

The innovation is based on the task; a combustion chamber too create, the inner wall of which is cooled ^ one largely under stoichioraetris before combustion without soot formation: enabled and in which the combustion can be easily controlled. In connection with the control of the combustion, the Exit or transfer speed of the combustion gas e into the Control the combustion chamber of the shaft furnace. V

The tasks set can be achieved through the known combustion chambers and do not meet goals or meet them in an unsatisfactory manner.

According to the innovation, the combustion chamber is designed in such a way that several inlet openings for the return gases are arranged in the plane of the inner wall of the chamber so that they flow into the combustion chamber in cocurrent (laminar) along the inner wall of the chamber. -: - "-

The combustion chamber interior is advantageously: at the inlet end at which the burner nozzle is located, the burner nozzle and the inlet opening for the combustion air that surrounds it concentrically are arranged coaxially to the combustion chamber axis. v _; V

The inlet openings for the return gas can be axially parallel Bores or be designed as flat channels, which in uniform Are spaced from each other.

It is also advantageous if the exit end of the combustion chamber conical, which opens into a coaxial outlet channel for the hot combustion gases, which in turn for the purpose of even distribution of the combustion gases in the The combustion chamber of the cylindrical shaft furnace opens into this tangentially.

Furthermore, the cross-section of the Gäsaus- or »-Übertrittsanal to control the exit speed of the combustion gases advantageously be changeable.

In Figures 1 to 3 of the drawings, the innovation is formed combustion chamber based on a preferred embodiment .shown, which will be discussed in more detail below

is written. Show it;

1 shows a longitudinal section through a combustion chamber according to the invention;

Fig. 2 shows a cross section through the chamber along the line H-II in Fig, I;

3 shows a cross section through the shaft furnace in the plane of the combustion chambers.

The combustion chamber 11 according to the invention shown in FIG. 1 has a substantially cylindrical combustion chamber interior 12, its front area 13 is conical at the inlet end is. Coaxial to the combustion chamber axis is located at the inlet end of the burner nozzle 14, around which the inlet opening 15 for the combustion air lies. Inside wall at the level of the combustion chamber 16 several channels 17 are introduced into the combustion chamber interior at the inlet end, through which return gas from the outside in cocurrent (laminar) is introduced along the wall 16 without creating turbulence.

As can be seen from Fig. 2, the return gas inlet openings or -channels 17 are arranged at the same distance from one another along the inner circumference of the chamber 11. ,

The outlet end of the combustion chamber 11 is also conical and connects to a coaxial outlet or overflow

channel 19, which, as FIG. 3 shows, tangentially into combustion chamber 20 of the shaft furnace 21 opens. In this way, for example four combustion chambers should be attached to the shaft furnace. Also in the case of lime shaft kilns of normal design with external mustard firing use the combustion chamber according to the invention with the greatest success; the gas overflow channels are then arranged radially.

The introduction of the return gases into the combustion chamber in the form of axially parallel Direct currents through, for example, eight inlet channel e 17 has the advantage that the chamber inner wall 16 is cooled as well as the combustion see: can be regulated easily. The direct current established in the chamber also causes a Part of the CO «content of the return gas from the preheating zone of lime shaft kilns can be converted into 2 CO because the dwell time compared to that in the known turbulent return gas management is extended and the conversion reaction is promoted.

The new combustion chamber is designed so that at Oil or gas firing the air ratio number between fuel and air can be reduced to O, 4 without a Soot formation occurs.

Everything that is included in the description belongs to the innovation and or, or is shown in the drawing, including of what deviates from the specific exemplary embodiments obvious to the expert.

W / Ro / Mk

Claims (4)

α υ a ii u; β · ι 4.2.67 PA TEN TAN WÄL TE '. K ^ Lcini- ^ yCeinricn ^ Jrei / PATENTANWALT MÜ LLER-BÖ RNER PATENTANWALT DIPL.-ING. WEY BERLIN 33 (DAHLEM) ■ PODBI ELS KIÄLLEE 68 8 MUNICH 22 · WIDENMAYERSTRASSE TELEPHONE 762907 · TELEGRAMS: PROPINDUS TELEFON 22 55 85 · TELEGRAMS: PROPINDUS Egon St i n gel, M e r an (Italy) 1. Combustion chamber with a cylindrical interior for shaft furnaces operated with gas or liquid fuel *, in particular lime shaft furnaces, at one end of which the fuel nozzle and passages for combustion air and return gases from the shaft furnace are arranged and at the opposite end the combustion gases exit into the shaft furnace , characterized in that in the plane of the chamber r inner wall (16.) several along the chamber inner wall (16) in the interior (1-1.). the combustion chamber (12) entering openings (17) ^ u ¹ "the return gases (return gas inlet> openings) are arranged. TELEPHONE: 0184057 -2- 2. Combustion chamber after. Addressed 1, characterized in that the combustion chamber interior (12) in that of the burner nozzle opposite area (13) is conical and the burner nozzle (14) and these are concentric surrounding inlet opening (15) for the combustion air are arranged coaxially to the Brennkammerachsθ. 3 · combustion chamber after. Claim 1 or 2, characterized in that that the return gas inlet openings (i-7) in the same » arranged at a substantial distance from one another and gene or are designed as flat channels. 4. Combustion chamber according to claim 1, 2 or 3, dadureh gekenn « shows that the one opposite the burner nozzle The end (18) of the combustion chamber interior (12) is conical and opens into a coaxial gas outlet channel (19). 5 · Combustion chamber according to claim 4, characterized in that that the cross section of the gas outlet (19) can be changed ! St. : Note * This under tea * (Besshreibuno un <? Schuhensör.) Te! dte juletzi elnoerelehk ilt ("Jehi md * War! - fossuno w wsDrünouoh emoereicmer. Jntsrioaer- st ie.-eohiliohe Secieurono de- Ab / _f " icr.un _? is "not.," rirfl Die urlprönohcr, "noere.eam unsono = ^ betmoer ä.cr, -.ρ, oer -tmtsä »ef.,;. 5ii ^ οηηβΛ .aoerter Without ,, <iCfr * i <her. lmwuses oebünrsnfra: amgesener.« roer »» Cn forokü ^ eft »9- *