DE102008060876A1 - Connection technology for air nozzle, has connection coupling at air supply, where connection coupling is fixed at combustion chamber base, and one or multiple air nozzles are arranged in reversible manner in combustion chamber base - Google Patents

Abstract

The connection technology has a connection coupling (1) at an air supply, where the connection coupling is fixed at a combustion chamber base (3). One or multiple air nozzles (2) are arranged in a reversible manner in the combustion chamber base. The air nozzles are aligned at the connection coupling. The connection technology is used as heat- and wear resistant air supply system in the combustion chamber with fluidized bed lights.

Description

The The present invention relates to a connection technique for air nozzles, which as heat and wear resistant air supply systems used in combustion chambers with fluidized bed firing.

The Fluidized bed combustion has in the prior art as environmentally friendly solution especially for the incineration of waste - for example for the thermal treatment of sludge or household waste - because here significantly lower amounts of pollutants than in conventional firing be emitted. One with air nozzles stocked Carries combustion chamber floor a pile of fine-grained, non-flammable material, which is flowed through from below with supply air. The thereby mounted perpendicular to the combustion chamber floor air nozzles the so-called jet bed. By means of an additional supplied Fuel becomes one together with the air supply through the air nozzles Burning produced in the combustion chamber.

by virtue of the high stress of the material due to heat and dust swirling it comes with the air nozzles in principle to a high degree of wear, so that arranged on the combustion chamber floor air nozzles at regular intervals must be completely renewed in the context of revisions.

Conventional become the air nozzles while welded to a Zuluftrohr to achieve the required stability. For one Replacement of old parts at revisions must therefore all air nozzles consuming from Pipe are separated by means of burning or cutting technology before the replacement nozzles be welded can. In conventional mounting is therefore both the separation of Altdüsen as well as the welding the new nozzles associated with the supply air of the combustion chamber with very substantial expenses, what makes both the dismantling worn and the Attaching new spare parts is associated with high costs.

The Object of the present invention is any air nozzles on the combustion chamber floor with a corresponding connection technology on the air supply system the combustion chamber in such a way that both the disassembly worn nozzles as well as the installation of new nozzles relieved and reduces the cost of maintenance on renewals become.

According to the invention solved above object with the features of claim 1. advantageous Embodiments of the connection technology according to the invention are in Subclaims specified.

After that is a connection technique for air nozzles of the type mentioned above, characterized in that they at least has a fixable on the combustion chamber floor connection coupling to the supply air, at the one or more adapted to the coupling coupling air nozzles reversible to be ordered.

at first installation of the air nozzle with modified connection technology as with conventional connections the old nozzle separated from the supply air pipe of the combustion chamber and the connection coupling the supply air welded to the combustion chamber floor. The connection coupling adapted air nozzle is then positively and / or positively inserted into the clutch or placed on the connection coupling.

Of the essential and decisive advantage of the proposed connection technology for air nozzles Thus, that in subsequent revisions to replace worn air nozzles considerable labor and cost reductions are achieved.

Further Objectives, features, advantages and applications of the connection technology according to the invention will become apparent from the following description of an embodiment based on the drawing. All are described and / or illustrated illustrated features for itself or in any combination the subject matter of the invention, independently from the summary in individual claims or their dependency.

In the drawing shows

1 a preferred embodiment of the connection coupling 1 and air nozzle 2 , in lateral view, partially broken.

How out 1 it can be seen, the connection coupling preferably consists of a conical hollow shaft 1a , the bottom side with the bottom of the combustion chamber 3 is welded to the supply air.

Above the hollow shaft 1a is a half-cup-shaped recording 1b provided in the air nozzle 2 can be introduced positively.

In an advantageous embodiment have recording 1b and air nozzle 2 axially spaced (preferably continuous) holes 4a and 4b on, through which to fix the air nozzle 2 at the connection coupling a locking pin 4 or a safety screw 4 made of heat-resistant material can be introduced. Within the scope of the revisions after the first attachment of the connection technology, only the security pin becomes available 4 removed, the attached (stationary) connection coupling 1 with the air nozzle 2 combines. The Luftdü sen 2 can now go back to the recording 1b the connection coupling 1 introduced and with the locking pin 4 or the screw 4 be secured.

The Connection system according to the invention limited in their execution not to the preferred embodiments given above. Rather, a variety of design variations are conceivable which of the illustrated solution also in principle different type of execution Make use.

1

connection coupling

1a

hollow shaft

1b

half-cup-shaped receptacle

2

air nozzle

3

combustion chamber base

4

Locking pin / locking screw

4a

Bore on 1b

4b

Bore on 2

Claims (5)

Connection technology for air nozzles ( 2 ), which are used as heat- and wear-resistant air supply systems in combustion chambers with fluidized-bed firing, characterized in that the connection technology at least one at the combustion chamber floor ( 3 ) fixable connection coupling ( 1 ) to the supply air, at which one or more of the connection coupling ( 1 ) adapted air nozzles ( 2 ) are arranged reversibly. Connection method according to claim 1, characterized in that the air nozzle ( 2 ) and connection coupling ( 1 ) are formed such that the air nozzle positively and / or positively in the coupling ( 1 ) or on the connection coupling ( 1 ) can be placed. Connection system according to claims 1 and 2, characterized in that the connection coupling ( 1 ) of a conical hollow shaft ( 1a ), the underside with the combustion chamber floor ( 3 ) is welded to the supply air. Connection method according to claim 3, characterized in that above the hollow shaft ( 1a ) a half-shell-shaped receptacle ( 1b ) is provided, into which the air nozzle ( 2 ) can be inserted positively. Connection method according to one or more of the preceding claims, characterized in that recording ( 1b ) and air nozzle ( 2 ) axially arranged bores ( 4a ) and ( 4b ), by which for fixing the air nozzle ( 2 ) at the connection coupling ( 1 ) a locking pin ( 4 ) or a safety screw ( 4 ) can be introduced from heat-resistant material.