DE2164682C3 - Heating chamber for an indirectly heated rotary kiln drum - Google Patents

Description

Between the burners 4 of the heating chamber Z are 'partition walls? (Fig, I, 2) attached, which are perpendicular to the axis of the drum 1 and do not touch the surface of the drum 1. The intermediate walls 7 are made of refractory material.

The Hcizkanmier according to the invention for rotary kiln tromtr. , In works like this:

The fuel-air mixture previously mixed in a mixer is fed into the burner 4 (F i g. 2) regardless of the direction of rotation de; Drum 1 guided tangentially to the surface of the hearth S so that the fuel burns on the surface of the stove S, as a result of the intensive heat exchange, which the combustion of the fuel

accompanied, the stove S heats, and or gives its warmth by peening on the drum. In this way, when the drum 1 is heated in the inventive Heating chamber 2 avoids contact between the flame and the drum 1, whereby the

> o Drum 1 is protected against oxidation.

1 sheet of drawings

Claims (1)

1 2 contain unbound oxygen, with the Claim: resulting in a wall, which results in an intensive change of the drum wall and destruction of the Keizkemmer for an indirectly heated rotating machine is caused The return of a furnace drum with burners arranged in series in recesses in the canister side, i.e. fuel, through which the overheating of the drum is characterized by the stove is to be avoided, impairs the combustion (5) of the heating chamber (2) in the cross-section spiraling process of the fuel, reduces the energetic, the spiral in the direction of the fuel potential of the combustion products as well as (4) towards the Drum (1) becomes narrower, while the io the degree of utilization of the fuel heat. The burner (4) tangential to the stove (5) allows the heating influence of the neighboring burner on each other chamber (2) are arranged, and that between it not, the heat flow in the furnace along the burner (4) partition walls (7) arranged on the drum to distribute the necessary way,
The invention is based on the object of not touching a surface of the drum (1). 15 to create a heating chamber in which no local Drum overheating takes place, whereby in comparison with the known heating chamber the utilization - the degree of fuel heat efficiency is higher and one optimal distribution of the heat flow, which heats the ao drum in the longitudinal direction of the furnace, ensured The invention relates to a heating chamber. for an indirectly heated rotary kiln drum with in This object is achieved in that the heating Recesses in the side walls of the chamber in a row for a rotary kiln drum with in the external part Burners. There is a heating chamber for a rotary kiln drum with 5 burners according to the invention equipped with a stove (SU-PS 251 540) known with burners, which is equipped with a spiral cross-section, with the Savings in the lining of the heating chamber side spiral in the direction from the burner to the drum tighter walls are mounted. These burners are tangential, while the drenner are tangential to the heater Drum surface in which the drum rotary chamber hearth are arranged. Zv /; s-hen the fervor arranged in the opposite direction. 30 nern partitions are arranged, which are perpendicular ·. '. The heating chamber is in the lining in the direction of the axis of the drum and the drum structures Equipped with return channels which do not touch the surface. a part of the cooled combustion products. In the chamber according to the invention it is possible Return the fuel to the burner in order to bring the fuel-air mixture into the chamber To lower the combustion temperature of the fuel, 35 tangential to the stove and conduct a combustion and which prevent overheating of the furnace drum and the fuel on the furnace surface. len. Here are an active heat exchange of the When the rotary kiln is in operation, fuel 40 is avoided in the burners, which have a high temperature flame with which the kiln drum and drum overheating are arranged tangentially in recesses in the lining of the drum. The combustion of the fuel is directed to the and air. Part of the stove surface ensures an intensive, heat-cooled combustion products of the fuel, which are exchanged between the combustion products from the fuel return channels and the stove, as well as between them. Fuel, air and cooled the stove and the drum, whereby the exhaust products of combustion of the fuel reach 45 degree of fuel heat is increased. The drum surrounds the annular heating chamber space that prevents the partition walls between the burners. Here, fuel and air are influenced by afterburners on each other, thereby mixing, and the mixture is burned under flames through an optimally large heat flow to the drum formation. The furnace drum can be ensured over its entire length,
A stream of gaseous products washes around them, which 50 In the following, the invention is transferred to the furnace drum by means of the heat. The current gas writing of an embodiment and hand-shaped products is explained along the drum through drawings. It shows
mixes and leaves the heating chamber via the smoke F i g. i a longitudinal section through the sch'.ct. would like Hekkäüuuef for a Drehoienifomniel and The known heating chamber, however, has the section H-II of FIG. 1.
parts, which consist in that the heat transfer The ürehofentrommel 1 (Fig. 1) is located in by radiation mainly through that of the heating chamber 2, ir the recesses of the gaseous heat transfer medium (the combustion pro side walls3 (Fig.2) of the lining of this products of the fuel) takes place, which a discontinuous chamber burner 4 are mounted, soft in a Liches radiation spectrum, whereby the in-60 rows are arranged along the drum 1. Of the The intensity of the heat exchange is reduced, the temperature stove 5 of the heating chamber 2 is spiral temperature in cross section the form flowing out of the heating chamber. The spiral is in the direction of the burner 4 combustion products of the fuel is increased and closer to the drum 1, and the burners 4 are tangent Heat losses are increased. tial directed towards the hearth 5, causing the combustion The location of the burners in the heating chamber-65 of the fuel on the surface of the stove 5 Lining tangential to the drum has a di- is ensured. The stolen combustion rCntCxs nCntai & t uCF τ OTtjTSilTivTi ^ ßyTOvitiri.v5 uCS prCuUzvtc Vc »a3acu ciod v / L / cTtcii ν U0F πυΐΖΚΟΠΪΠΪϋΓ ύ Fuel that is at a high temperature and through the smoke chimney (not shown).