DE8121035U1 - CARBON DUST BURNER - Google Patents

Description

Erich Benninghoven, 4ol8 Langenfeld, Eichenfeldstr. 32

Pulverized coal burners

The invention relates to a pulverized coal burner, in which the pulverized coal-air mixture in a larger number of Individual streams are broken down, which mix with the secondary air flowing through the housing of the pulverized coal burner.

The well-known pulverized coal burners have an essential stake Disadvantage, which can be seen in the following. In order to achieve perfect combustion, this is it Coal dust-air mixture feeding conveyor line is upstream of a deflector through which the coal dust-air Mixture divided into a larger number of individual streams

I I

• · »I

I ■

■ ·

• *

-4-

will. However, the bundling of the individual streams is so tight that an optimal mixture of the coal dust-air mixture with the secondary air cannot be achieved. It can also the known pulverized coal burners cannot be used for operation with oil. But there is a definite for this Need, since it cannot be ruled out that a malfunction occurs in the supply of the pulverized coal-air mixture or coal dust is not available due to a lack of delivery. In these cases one has thus far been forced to close the pulverized coal burner through an oil burner replace, which is cumbersome and time consuming.

Deir invention is therefore based on the object Coal dust burner of the type described at the beginning with reference to the mixture of the coal dust-air mixture to improve with the secondary air and further so on to train that he operated with oil if necessary can be.

According to the invention, the object is achieved in that

a) the delivery line for the coal dust-air mixture

with the interposition of a pipe socket in one in Ϊ

the housing of the burner with a distance on all sides from the | Inside wall of the housing arranged chamber opens, at the outlet pipes provided with burner heads in a Multitudes are connected in a circle and at a distance from each other,

"· · * L <ItIIIIII •« •• «III, ■

-5-

b) the outlet pipes around one with a central hole provided Wirb.eT.pl atte are grouped,

c) an oil delivery line between the chamber and the vortex plate opens, which is upstream of the hole in the vortex plate with its atomizer nozzle,

d) the vortex plate for the flame bedding of both combustion systems is common.

The burner according to the invention combines one in itself

Coal burner and an oil burner with either one Systems common vortex plate, being with the burner regardless of whether it operated with coal dust or 01

the same performance is achieved as with a burner that is set up solely for operation with coal dust or oil will. It is further characterized by the fact that the pulverized coal-air mixture consists of a plurality of at a distance from one another arranged outlet pipes, an optimal

■

Mixing of the coal dust-air mixture with the rotating secondary air as well as that passing through from the vortex plate rotating air and thereby an optimal combustion achieved '. A small total excess of rotating air is used to cool the burner head jacket common to both systems, with the result that the burner head jacket does not burn and thus the arrangement of a fireclay sleeve can be dispensed with can.

* »· I ι III t ι ι • III ■ ι ¹ '> ■ Mt I 1 · ■, ■ · ■! · ·

-6-

An advantageous development of the invention Burner consists in that the burner heads of the outlet pipes are arranged on the latter so that they can be adjusted radially and axially, whereby the outlet cross-section and the outlet direction can be changed are.

The invention is shown below in one embodiment explained in more detail with reference to the drawing. It shows:

Fig. 1 the pulverized coal burner in view, partially in Cut,

Fig. 2 is a section along the line II-II of Fig. 1, 3 shows a partially drawn outlet pipe with burner head in view, partially in section,

and
FIG. 4 shows a section along the line IV-IV in FIG. 3.

The housing of the pulverized coal burner is denoted by ^{1 and the burner head casing is denoted by I 1.} In the housing 1, a fan is accommodated on the suction side, which consists of a drive motor 2 and fan blades 3. There are also two air flaps 4, 5 arranged on the suction side, which are adjustable via a crank linkage 6 by means of a servomotor.

• ψ, i

- 7-

In the housing 1, a chamber 7 is fixedly arranged at all sides from the inner wall, on which a the Jacket of the housing 1 penetrating pipe socket 8 is fixedly arranged. This is used to connect an in the Drawing, not shown, delivery line for the coal dust-air mixture. At the chamber 7 are angular Outlet pipes 9 circular and connected at a distance from each other, on which burner heads Io axially and radially are adjustable. A circular vortex plate is designated by 11, which has a central hole 12 and around which the outlet tubes 9 are grouped. The vortex plate 11 consists in a known manner of individual, lamellae 13 each provided with a bend. 14 is an oil-ignition auxiliary burner, the side is inserted into the housing 1 and the vortex plate 11 penetrates.

That flowing out of the burner heads Io of the outlet pipes 9 Coal dust-air mixture mixes with the rotating secondary air flowing through the housing 1 and the rotating air emerging from the vortex plate 11, the coal dust-air mixture being ignited and the Vortex plate 11 forms the flame bed.

With an oil delivery line is designated, the side is inserted into the housing 1 of the pulverized coal burner

I'll

and opens into the space between the chamber 7 and the vortex plate. The oil delivery line 15 is provided with an atomizer nozzle 16 provided, which is upstream of the hole 12 of the vortex plate 11.

The oil flowing out of the atomizer nozzle 16 penetrates the Hole 12 of the swirl plate 11. The combustion process is then the same as when operating the burner with Coal dust.

The burner is switched to operation with oil preferably automatically, for example by electrical means Steering.

Claims (2)

■ η k Protection claims Coal dust burner in which the coal dust-air mixture is broken down into a larger number of individual streams, which deal with the housing of the pulverized coal burner mix through secondary air, characterized in that a) the conveying line for the coal dust-air mixture with the interposition of a pipe socket (8) in one arranged in the housing (1) of the burner at a distance on all sides from the inner wall of the housing (1) Chamber (7) opens into the one with burner heads (10) provided outlet pipes (9) in a plurality circular and spaced from each other are connected b) the outlet pipes (9) around a vortex plate provided with a central hole (12) (11} are grouped, c) between the chamber (7) and the vortex plate (11) a !!! delivery line (15) which opens with its atomizer nozzle (16) is upstream of the hole (12) in the vortex plate (11), 'III! · -2- d) the swirl plate (11) for flame bedding both
Burning systems is common. 2. pulverized coal burner according to claim 1, characterized in that the burner heads (lo) of the outlet pipes (9) are arranged radially and axially adjustable on the latter.