EP2182281A1 - Additional assembly for a combustion device - Google Patents

Abstract

The arrangement has a supplying device supplying a fuel element e.g. charcoal, from a storage to a firing device (10). The supplying device has a temporary storage (31) for the fuel element. The temporary storage is arranged in a tower (30) adjusted at the firing device. A guide path (12) is provided at a burner (11) of the firing device by the temporary storage. A suction device is arranged in the tower for sucking of the fuel element from the temporary storage. A compressor presses pressure air into a region of an input element of a combustion chamber of the burner of the firing device.

Description

The invention relates to an additional arrangement for a firing device, with a supply device for fuel pieces from a bearing to the firing device.

Firing devices serve, among other things, to burn solid fuels, such as coal, charcoal and wood. In particular, wood pellets are increasingly being used as solid fuels. The individual pellets represent fuel pieces. These pieces of fuel or pellets or other solid fuel parts are arranged in a warehouse, from which they must be supplied to a burner of the corresponding firing device.

The camp takes in each case a very large number of such pieces of fuel or pellets, which is sufficient for a longer period, for example a year or at least a few months. The individual pellets must now be supplied to the burner in much smaller quantities by being burned to produce heat energy.

Whereas previously each of these pellets or other pieces of fuel were supplied to the burner manually from the warehouse or reservoir, for example by means of a blade, automated feeders have been used for some time. These feeders generally comprise a conveyor belt several meters long or a screw conveyor. This protrudes from the lowest point of the warehouse or storage tank to the burner. This burner is located in some devices in the upper part of the firing device, ie about 1 to 1.5 m above the ground. This is especially true when the firing device has a memory in which the burner is to make a heating, for example, of layers of water, which are due to energetic reasons in the upper part of this water reservoir.

The burner burns the fuels in a combustion chamber.

To move from the lowest point of the reservoir to the much higher burner, conveyor belts or augers are used which feed, at an angle of 45 degrees, the pellets or other solid fuel particles obliquely upwardly from the bearing to the combustor burner ,

Although this is proven and works well, but has the disadvantage of taking up quite a lot of space and space. This is very unfavorable because such firing devices are often placed in the basement of residential buildings, where only limited space is available. In addition, the possibility of arranging the firing devices and this feeding device is very limited in order to meet these external requirements. But even if the corresponding firing devices and reservoir for the pellets are not placed in the cellars of residential buildings, it is very annoying to have to provide a lot of space for these elements, especially by the arrangement of conveyor belts or augers transversely in the room use of the entire room is significantly restricted.

The object of the invention, therefore, in contrast, to find a better way, as the supply of a firing device with pieces of fuel in space-saving form can be made.

This object is achieved in a generic additional arrangement in that the supply device comprises a buffer for pieces of fuel, that the buffer is arranged in an adjustable next to the firing tower, and that from the buffer to a burner of the firing device, a delivery path is provided.

In this way it becomes possible not only to solve the problem, but also to exploit a whole range of other advantages, with a practicable and simple structure.

The feeder now has no transversely in space or even at an angle of 45 degrees up leading, several meters long conveyor. Instead, it has a tower in the form of an upright stand, in which there is a buffer for the pieces of fuel, especially the wood pellets.

The individual pellets can now be performed horizontally near the bottom or by means of hoses from the reservoir, so the camp to the tower near the ground first. They are then directed upwards into or out of the tower into the cache. A conveying path running near the floor can be covered by suitable means and therefore interferes with the use of the space significantly less than a conveying path which leads obliquely at waist level through the room or along a wall. In the tower itself, for example, a vertically ascending scroll or a kind of paternoster design can be formed to guide the pellets or other fuel pieces up into the buffer.

This buffer can take about a daily requirement of pellets for the burner of the firing device (for example, 10 to 50 liters). This has the further advantage that the supply of pellets to this cache only once or a few times a day must be served, so less demanding, less defined must be metered, does not lead to a continuous generation of noise that would need to be permanently insulated and also Incidentally, it is very undemanding.

The buffer is preferably arranged at a height in the tower which corresponds approximately to the height of the burner. This means that one can place the tower relatively close to the firing device and in this way can keep the path from the intermediate storage or buffer for the pellets to the burner very short and moreover substantially horizontal. This path can be, for example, between 30 cm and 1 m long.

This has the advantage that the conveying element to be used here can be a metering screw. Since this has to be very short, it can very precisely take into account the needs of the burner and can extremely extraordinarily and continuously feed the pellets or other pieces of fuel to the burner. Since it is relatively short, noise reduction measures are relatively simple. Since the conveying path is horizontal or slightly inclined, relatively little energy or motor power is required for driving the metering screw.

The metering screw may also be designed adjustable in angle in preferred embodiments. This can be achieved in that the turret of the tower for access to the metering screw can be equipped with a flexible receptacle for this metering screw. This may for example be a rubber Reduziermuffe.

In the tower can be used for upward conveying or generally for conveying the pellets from the camp, a pressure or negative pressure device, which can also be arranged completely in this tower.

It is particularly advantageous that in the tower in preferred embodiments, not only the intermediate storage for the pellets or pieces of fuel can be arranged and also the motor and drive means for transporting the pellets from the warehouse to the buffer and from the buffer to the burner, but also the control unit, which takes over the control of the plant. The control unit could also be arranged outside the tower as part of a system controller.

In addition, it is preferable to provide a possibility for the removal of combustion residues from the firing device within the scope of the same additional arrangement.

The burning of pellets or pieces of fuel in the burner naturally results in the formation of exhaust gases and combustion residues, the latter especially in the form of ash. These ashes and other residues settle in the exhaust gas heat exchangers, exhaust pipes and other output elements of a combustion chamber of the burner and are usually shaken loose by shaking and then have to be disposed of from the system in a suitable form.

For this disposal, a preferred embodiment of the invention now provides, in a further or in the same tower in which the buffer for the supply of the pellet, to arrange a suction device, with the arising there from these exhaust elements of the combustion chamber of the burner Ash or other substances can be sucked.

It is particularly preferred if, in addition, a cyclone is provided which separates these ashes from the extracted gases and drops into an ash container. This ash container can preferably also be provided in this tower.

All this has the advantage that these residues disposal elements are in the immediate vicinity of the firing device and thus only relatively short lines from the burner or its output elements are needed to remove the ash, and that without the complicated additional facilities must be used.

It is further preferred if a filter is provided at the cyclone (s) for protecting the suction devices.

Such a filter can prevent the sucked ash particles or pellets or other pieces of fuel inadvertently get into the suction device.

Furthermore, it is preferable if a switching mechanism or a circuit of switching valves for the common suction device is provided, if the Suction device is provided for the promotion of both the ash particles and the pellets.

This allows an even more targeted use of the suction for multiple purposes.

If, in a preferred embodiment, all these elements are arranged in a tower, this is particularly space-saving and structurally particularly simple.

In a non-prepublished German patent application 10 2008 022 696.3 is proposed for the purification of the exhaust pipes and exhaust gas heat exchanger of a combustion chamber of a burner in a firing device, instead of a vibrating device with compressed air to solve the adhering ash particles and other residues. Also for such a cleaning device of burners, the additional arrangement according to the invention offers, because even a compressor could be arranged in the tower in a preferred embodiment and supply with compressed air lines to the desired locations.

Here, a common control unit can be provided with an associated suction device, which then takes over the suction of the dissolved ash particles, matched to the compressor.

It is possible to use suction devices and cyclones on the one hand for conveying the pellets from the bearing into the buffer and on the other hand for removing the ash particles from the burner. For this purpose, separate suction devices and separate cyclones can be used, but it would also be possible to use one and the same suction device and one and the same cyclone on the one hand for conveying the pellets and on the other hand for conveying the ash.

It can be used to advantage that the promotion of the pellets from the reservoir or storage in the cache not continuously, but only once a day, or at least in very large intervals, and that the ash particles from the burner need not be continuously withdrawn. By a clever vote of the control unit so here is a double use of the suction done, with appropriate separations of each subsidized elements are provided.

The suction by means of negative pressure in each case via the interposition of the cyclone. The aspirated particles are then separated in the cyclone and placed down in the ash collection tank or in the buffer, while the negative pressure from the suction device, the air or the exhaust gas in the cyclone deducted.

It is furthermore advantageous if the supply of the solid fuel particles or pieces of fuel, for example of the pellets, via the metering screw to the burner takes place in such a way that a safety protective tube is interposed. If a case of damage then occurs and pellets ignite during the supply, this supply is interrupted immediately, since a combustible or meltable safety protective sleeve melts and thus no further supply of pellets or solid fuel particles to the burner of the firing device longer occurs. The fire can thereby continue in any case towards the tower housing.

In a preferred embodiment it is provided that the tower or towers is / are equipped with height-adjustable feet.

This has the advantage that the exact position, among other things, of the temporary storage relative to the burner can be adjusted very precisely, so that, for example, the metering screw can be optimally aligned.

Furthermore, in some embodiments it is preferred if the buffer and / or the ash container have level sensors.

With these level sensors can be made in conjunction with the one or more control units shutdown of suction or other conveying organs when the corresponding containers are filled. Also, in a filled ash container in this way the user a required disposal can be displayed.

Furthermore, it is preferred if the tower or towers are partially or completely provided with a sound insulation.

With such a sound insulation, the resulting noise can be targeted dampen. Such a soundproofing of the towers is very effectively possible, since concrete enclosed space must be insulated.

The result is a very cost-effective and overall very effective system, which also takes up very little space, since the various elements are all arranged one above the other. The entire tower with its housing can also be arranged variably in the vicinity of the burner with the associated boiler, so that then adjustments to the different cuts of basements in residential buildings can be made. This also applies if a version is not used with a tower for an additional arrangement, but if the additional arrangement has two towers.

Also conceivable is a modular construction of a tower of the additional arrangement. Also possible is a modular design of both towers. In a tower, a division into an upper element and a lower element would take place at a parting plane. The lower element would form a kind of cleaning unit and could be used alone as an additional arrangement to a firing device, if it can be dispensed with a supply of an intermediate storage of fuel pieces. Such a feeder can then be retrofitted as the need arises.

The upper element would receive the feeder and all associated aggregates.

The cleaning unit may in particular also be equipped with an ash container or be. This ash container can be designed so that it is easily extendable and separately rollable. The tower as a whole can be made rollable. The ash container is preferably equipped tightly closing the tower with a handle at waist height of the user.

The design of the tower can be adapted to the firing device, for example, the same color and the same form elements obtained. It also applies to the other embodiments of the towers.

In the following, some embodiments of the invention and the thus solvable concepts are shown in more detail with reference to the drawing.

Figur 1

eine schematische Darstellung einer herkömmlichen Kombination aus Feuerungseinrichtung mit Brennstoffzufuhr;

Figur 2

eine schematische Darstellung einer Feuerungseinrichtung mit einer ersten Ausführungsform der Erfindung;

Figur 3

eine schematische Darstellung einer Feuerungseinrichtung mit einer zweiten Ausführungsform der Erfindung;

Figur 4

eine schematische Darstellung einer Feuerungseinrichtung mit einer dritten Ausführungsform der Erfindung;

Figur 5

eine schematische Darstellung einer Feuerungseinrichtung mit einer vierten Ausführungsform der Erfindung;

Figur 6

eine schematische Darstellung einer Feuerungseinrichtung mit einer fünften Ausführungsform der Erfindung;

Figur 7

eine schematische Darstellung einer Feuerungseinrichtung mit einer sechsten Ausführungsform der Erfindung;

Figur 8

eine schematische Darstellung einer Feuerungseinrichtung mit einer siebten Ausführungsform der Erfindung;

Figur 9

eine schematische Darstellung einer Feuerungseinrichtung mit einer achten Ausführungsform der Erfindung;

Figur 10

eine schematische Darstellung eines Details aus der Figur 8 in alternativer Ausführungsform, und

Figur 11

ein Detail der Ausführungsform aus der Figur 10.

Show it:

FIG. 1

a schematic representation of a conventional combination of firing device with fuel supply;

FIG. 2

a schematic representation of a firing device with a first embodiment of the invention;

FIG. 3

a schematic representation of a firing device with a second embodiment of the invention;

FIG. 4

a schematic representation of a firing device with a third embodiment of the invention;

FIG. 5

a schematic representation of a firing device with a fourth embodiment of the invention;

FIG. 6

a schematic representation of a firing device with a fifth embodiment of the invention;

FIG. 7

a schematic representation of a firing device with a sixth embodiment of the invention;

FIG. 8

a schematic representation of a firing device with a seventh embodiment of the invention;

FIG. 9

a schematic representation of a firing device with an eighth embodiment of the invention;

FIG. 10

a schematic representation of a detail of the FIG. 8 in an alternative embodiment, and

FIG. 11

a detail of the embodiment of the FIG. 10 ,

In the FIG. 1 a firing device 10 with a burner 11 is shown. The firing device 10 may be, for example, a pellet stove with a boiler and other units. To this firing device also other elements may be connected (not shown), for example, solar thermal systems, geothermal heat exchangers, a heating device or a hot water supply.

In the firing device 10, the burner 11 is drawn out separately. The burner 11 is in particular a pellet burner, ie a burner which burns pellets, in particular wood pellets.

For this purpose, he is the pellets from a warehouse 20 for fuel, in particular for wood pellets fed. The camp is here so a pellet storage bunker. From the bearing 20 leads for this purpose a screw conveyor 21 by about 45 degrees upwards and accordingly promotes the pellets located in the camp 20 (or other similar fuels) obliquely upward. A worm motor 22 is additionally indicated for this purpose. Typically, such augers are about 1.5 m long to carry the pellets to a height of also 1.5 m, which is in the FIG. 1 is indicated. Of course, other track lengths are conceivable. In any case, these conveyor lines occupy considerable space in a basement room of a residential building (not shown) and thus also limit the possibilities of where and in which form the firing device 10 and the warehouse 20 for the wood pellets can be arranged.

This long conveyor line via the screw conveyor 21 is required so that the pellets reach a height from which they can pass via a feed element 12 to the burner 11 in the firing device 10. These burners 11 must be arranged at about this height to be in the boiler of Firing device 10 a meaningful and desired position rather take in the upper third.

Thus, the entire concept is very space consuming and due to spatial conditions not everywhere easily used.

In the FIG. 2 a first embodiment of the invention with a firing device 10 and a burner 11 is shown, which requires significantly less space than the conception of the FIG. 1 , The representation is not to scale, in order to be able to represent all elements comprehensible.

A tower 30 is provided, in the upper area of which there is a buffer 31. In this buffer 31 fuels, in particular pellets and especially wood pellets can be kept in stock in an amount needed, for example, for burning in one day or for several hours. This buffer 31 is located at a height of the tower 30, which allows to bring with a relatively short dosing screw 24, the pellets to the feed element 12, from which they reach the burner 11. The overcoming gradients are low and the horizontal to be overcome distances are minimal. they are in the FIG. 2 even enlarged shown to allow a clear presentation of the concept.

Due to the relatively short transport routes, a precise metering screw 24 can be used, the use of which brings considerable advantages. Through the enabled fine metering, the pellets can be much more uniformly supplied in the ember bed of the burner 11. This in turn results in a more stable combustion and, in turn, lower fluctuations in the amounts of exhaust gas produced by the burner 11.

The pellets are the buffer 31 from the in the FIG. 2 not shown bearing 20 fed via a relatively undemanding promotion; indicated is a horizontally extending screw and a listed next to the tower 30 paternoster or a climbing snail.

In principle, it would be conceivable to convey the pellets for the daily requirement or for a few hours from the bearing 20 into the buffer 31 via a suction connection and hoses.

Also indicated is a control unit 51, which supervises the conveyance of the pellets in their various ways.

In the FIG. 3 a tower 40 is shown, which performs a discharge of ash of the burner 11 of the firing device 10. In the combustion process in burner 11 of course also combustion residue in the form of ash, which must be removed. This ash can either be shaken off from the walls of the burner 11 by means of a vibrating device and be discharged downwards from the firing device 10, or another form of mechanical cleaning is carried out by suction or by means of compressed air.

In the tower 40, an ash container 41 is provided for this purpose, in which the ash is to get out of the burner 11. For this to happen, a suction device 43 is provided, which acts on the burner 11, which is shown here symbolically by arrows. The suction device 43 draws air from the burner 11 or from its exhaust ducts via a cyclone 44, which is also arranged in the tower 40. In the cyclone 44, the ash is removed from the extracted air stream and falls into the ash container 41st

The suction device 43 has a pressure side and a suction side. The pressure side corresponds to the actual exhaust air of the cyclone suction, but is used here as a pressure side for an integrated cleaning system of the firing device 10 with the burner 11. The ashes located in the burner chamber and / or in the exhaust gas heat exchanger are sucked off via the suction side of the suction device 43. Due to the principle of operation of the cyclone suction, the ash is separated from the air stream via the cyclone 44 and fed to the ash container 41.

Optionally, a compressor 61 can also be provided, which blows the ash from the walls of the exhaust ducts of the burner 11 and thus supports the cleaning. This compressor 61 could also be arranged in the tower 40. Schematically, the compressed air 62 emitted by it and its supply to the exhaust ducts of the burner 11 are shown.

The compressor 61 is particularly useful when a larger cleaning pressure is desired.

To control the compressor 61, the suction device 43, the cyclone 44 and any other elements, a control unit 52 is provided.

The towers 30 and 40 from the Figures 2 and 3 are expediently used together in one embodiment and are in any assignment to each other next to the firing device 10. In this case then acts the dosing screw 24 with the latch 31 on the burner 11 with respect to the supply of pellets, while the elements of the tower 40 with the ash discharge employ.

In the control units 51, 52 may be various relays, switching inputs, switching outputs and electronic elements.

An alternative for the tower 30 is in the FIG. 4 shown. Again, a firing device 10 is shown with a burner 11 on the left side, the bearing 20 for the fuels, in particular the wood pellets, located on the right side.

The tower 30 in the middle here has a buffer 31, above which there is still a suction device 33 and a cyclone 34. This suction device 33 with this cyclone 34 provides in this case for the transport of wood pellets from the warehouse 20 in the buffer 31st

From the intermediate storage 31, the pellets are transported via the metering screw 24 to the feed element 12 to the burner 11.

The metering screw 24 is relatively long in this embodiment, which is not desired per se and therefore comes only in special applications into consideration.

In contrast, an embodiment according to the FIG. 5 , This corresponds to that in the FIG. 4 with a firing device 10 with a burner 11 on the left side and a bearing 20 for fuels, in particular wood pellets, on the right side. In the middle of turn is the tower 30. Here, the buffer 31 for the pellets, however, is high up, so that the dosing screw 24 can again be made very short and thus the desired almost horizontal transfer of pellets from the buffer 31 via the metering screw 24th can be done to the feed element 12 in the burner 11.

This is possible by the suction device 33 is spatially separated from the cyclone 34. The suction device 33 thus conveys the pellets from the bearing 20 into the cyclone 34, from where they reach the buffer 31 directly below the cyclone 34.

In a variant of this embodiment, not shown, the suction device 33 is arranged above or adjacent to the cyclone 34 for technical reasons.

The control unit 51 is arranged here below. Unlike optically indicated, it does not have to occupy the entire cross-sectional area of the tower 30 in a horizontal extent, so that the air flow can reach the suction device 33 again next to the control unit 51.

Overall, therefore, the space-consuming conveyor of the prior art is replaced by a compact side tower, which also also takes over the disposal of the ash from the combustion in the burner 11 and the components required for this purpose in the form of compressors, ash aspirators and Aschetonnen with houses. This particularly space-saving solution thus combines several in the art partially unsolved and sometimes very space consuming and unsatisfactorily solved problems.

In the FIG. 6 a particularly preferred variant of the invention is shown. Here is a combination of towers 30 and 40 from the Figures 2 and 3 he follows.

This has a particularly small footprint of the overall solution result. The production costs are also very low.

The firing device 10 with the burner 11 on the left side can again be seen, to which a metering screw 24 feeds pellets via a feed element 12.

It is advantageous if the supply of the solid fuel particles, preferably the pellets, via the metering screw 24 so that the supply element 12 is a safety protective tube or has such. The interposition of such a hose leads to the fact that in case of damage, the fire from the firing device can not spread to just fed solid fuel particles. In this case, namely, the safety protective tube melts and thereby automatically interrupts the supply of additional pellets to the burner 11, so that a charring or a fire can not propagate in the direction of the housing of the tower 30.

From the (here not shown again) bearing 20, a promotion of the pellets is made in the buffer 31 via a horizontal conveyor and a climbing screw. A control unit 51 arranged above controls, among other things, this ascending screw and the metering screw 24.

Below the buffer 31 is an optional compressor 61, which in turn provides compressed air 62 for cleaning the exhaust gas heat exchangers or other elements of the burner 11 in the firing device 10.

Below the compressor 61 is the suction device 43 with a not shown here cyclone suction and below in turn the ash container 41, in which the ash from the burner 11 and the firing device 10 passes.

In the FIG. 7 is an embodiment similar to the FIG. 6 shown here, in turn, a combination of elements from the FIGS. 3 and 4 having.

In addition to the firing device 10 with the burner 11 is again the tower 30 and to the right of it the bearing 20 for the pellets. From the warehouse 20, however, the pellets are conveyed in this case by a suction device 33 with a cyclone 34 in the buffer 31 in the tower 30 for the pellets.

From the buffer 31, they in turn pass by means of the metering screw 24 via the feed element 12 into the burner 11.

The tower 30 in this case has two suction devices 33 and 43 and two cyclones 34 and 44. The second suction device 43 with the second cyclone 44 are shown here as one element. They in turn act on the cleaned-off ash particles in the firing device 10, bring them into the tower 30 and convey them there into the ash container 41.

Optionally, the provision of a compressor 61, which supplies compressed air 62 to the exhaust ducts of the burner 11, is also conceivable here.

In the FIG. 8 is a combination of the Figures 3 and 5 represented, in turn, essentially the FIG. 6 equivalent. The presentation also essentially corresponds to the FIG. 7 , but here again, the suction device 33 and the cyclone 34 are spatially separated, with the interposition of the latch 31, which enters in this way within the tower 30 in a higher position.

Incidentally, a firing device 10 is also connected to a bearing 20 with the interposition of a tower 30, wherein the pellets are conveyed by means of the suction device 33 and the cyclone 34 in the buffer 31 in the tower 30 and from there via the metering screw 24 and the feed element 12th get into the burner 11.

The ash elements pass via the suction device 43 into the ash container 41.

The control units 51 and 52 of the embodiments of the Figures 3 and 5 are summarized here again to a common control unit 51, which also reduces the production costs.

In the FIG. 9 the most preferred embodiment of the invention is shown. Here, several elements can be shared, which further reduces both space requirements and manufacturing costs.

In turn, a firing device 10 with a burner 11 and a bearing 20 for fuel pieces, that is to say in particular wood pellets, can be seen.

An intermediate tower 30 in this case has a suction device 33/43 and a cyclone 34/44. Between these two elements, on the one hand, a buffer 31 for the pellets and, on the other hand, an ash container 41 are switched on. Due to the two-dimensional image, these two elements are shown side by side here, but they can also be provided one behind the other or in another form in the same plane, which is particularly suitable for the respective purposes.

From the intermediate storage 31, the pellets temporarily stored there for the daily requirement or for a few hours are conveyed via the metering screw 24 and the feed element 12 to the burner 11.

The ash can from the firing device 10 and the exhaust ducts or the exhaust gas heat exchanger of the burner 11 via the Suction 33/43 and the cyclone 34/44 sucked off and stored in the ash container 41.

The suction device 33/43 with the cyclone 34/44 is therefore used here on the one hand for the suction of the pellets 20 and the conveying in the buffer 31 and on the other hand for the conveyance of the ash from the firing device 10 in the ash container 41. So this is possible , a correspondingly safe separation of the respective mass flows must take place, but this is conceivable through appropriate membranes and partitions.

It should also be borne in mind that the delivery of the pellets from the store 20 into the intermediate store 31 does not take place continuously, but only once a day or occasionally at intervals of several hours.

Also, the cleaning of the ash does not have to be continuous, but discontinuous at certain intervals or after the presence of sufficient amounts of ash. It is therefore possible here, with a time delay, to use the suction device 33/43 with the cyclone 34/44 for only one of these two uses. The control unit 51 can monitor and control this.

In the FIG. 10 a tower 30 is especially drawn out. Based on this tower 30 it is shown that the additional arrangement according to the invention for a firing device 10 can also be of modular design. FIG. 10 represents such a modular Beistellturm for a firing device 10 with a pellet burner. With this tower 30, the possibility is now created to sell only a portion of the tower 30 as a separately usable system and then subsequently to provide them with other structures ,

In the same way it becomes possible in this way to assemble the modular parts of the tower 30 according to the firing device. This makes it much easier to provide mass production parts and to provide firing devices with additional arrangements that no not have required or unwanted or non-economic components.

The tower 30 is for this purpose divided into two modular units, namely an upper unit 73, in which the elements for conveying the wood pellets to the burner 11 of the firing device 10 (see FIG. 8 ), and a member 74 which receives the elements connected to the cleaning of the firing device 10.

The two elements 73 and 74 can be separated by a parting plane 71 completely functional and completely in the mechanical design.

The side tower in the form of the tower 30 may, for example, at first only consist of the lower element 74, which has an ash container 41, above a cyclone 44 and above a suction device 43. As ash container 41 can be provided, for example, a rollable ash cone. The suction device 43 may be a suction turbine for the suction of the ash from the firing device 10.

The lower element 74 may, for example, in addition also adjustable, rubberized feet (not shown).

If required, the upper element 73 can then be mounted on the parting plane 71, for example by a screwed or snap connection.

The upper element 73 has a buffer 31 for the fuels, in particular a pellet buffer. Below this there is still a suction device 33 to suck the pellets from the bearing 20 zoom. A dosing screw 24 then leads the pellets out of the intermediate storage 31 to the left in the direction of the firing device 10 (compare again FIG. 8 ).

The modular design can be designed so that a maximum total height of the tower 30 in the complete state of about 1.80 m, but not exceeded. The diameter of the tower 30 may be about 50 cm to 65 cm. The fuel stager 31 can hold about 60 kg of pellets.

In the FIG. 11 is a detail in the embodiment FIG. 10 shown. However, this detail could also be formed in one of the other of the illustrated or not shown embodiments.

The tower 30 with the buffer 31 (see FIG. 10 ) has a conveying element (for example a metering screw 24 with which the pellets are transported from the intermediate storage 31 to the firing device 10.

In order to make this metering screw 24 or another conveying element, for example a climbing screw, particularly variable, is in the embodiment of the FIG. 11 for the metering screw 24, a receptacle 25 provided on the latch 31.

This receptacle 25 may be formed so that the angle which it occupies with the horizontal, is adjustable. The size of this angle relative to the horizontal is provided in appropriate embodiments between about 20 ° and 45 ° adjustable.

The metering screw 24 or the conveying element otherwise used there can then promote the pellets from the buffer 31 more or less steeply.

This has the consequence that the distance between the firing device 10 and the tower 30 can be set variably and significantly more freely. A tower 30 can then be connected in its structure then to different sized firing devices with different sized storage tanks.

Even height offsets can be compensated, which may occur due to an uneven basement floor or complicated cut premises.

The installation becomes even more flexible when a flexible rubber sleeve 26 is connected to the receptacle 25 for the metering screw 24 or the other conveying element. This rubber sleeve can then be connected to a preferably welded to the tower 30 and the latch 31 receptacle 25.

In the FIG. 11 It is provided that the rubber sleeve 26 is connected by a clamp 27 on the receptacle 25 for the metering screw 24.

Due to the flexibility of the rubber sleeve 26, the angle can be set even finer and the transition can be provided continuously. The choice of the angle to the horizontal can be done in this case simply by bending the rubber sleeve 26, with constant remaining recording 25th

A particular advantage would also be obtained if the rubber sleeve 26 is designed as Reduziermuffe. The rubber reducer sleeve 26 would then be able to reduce its diameter from the receptacle 25 to the other side into which the metering screw 24 is inserted.

In this way, one would get the opportunity to use a metering screw 24 with a smaller diameter compared to the receptacle 25 and thus even easier and more flexible compensation of an offset and to take into account an angle that deviates from the pitch angle of the receptacle 25.

In this way, the distance from the tower 30 to the firing device 10 could also be changed during the setting-up process and adapted to any external requirements, since the resulting changes in the pitch angle of the metering screw 24 can be taken into account easily within the reducing sleeve 26.

In addition to the clamp 27, with the rubber sleeve 26 is held on the receptacle 25, another, not shown clamp the rubber sleeve 26 hold on the metering screw 24 or the other conveyor element.

Instead of metering screws 24 and other conveying elements can be used, for example, climbing screws. This is of interest when the firing device 10 itself already has a metering device, for example a rotary valve or also a metering screw. The metering process then does not have to take place in the metering screw 24, but can be moved into the area of the firing device 10, so that a more cost-effective conveying element can be used.

LIST OF REFERENCE NUMBERS

10

firing

11

Burner in the firing device

12

Feed element to the burner 11

20

Warehouse for fuel, in particular wood pellets

21

Auger

22

auger motor

24

dosing screw

25

Receiving for a conveying element, for example, the metering screw 24th

26

grommet

27

clamp

30

tower

31

Cache for fuels, in particular pellet caches

33

suction

34

cyclone

40

tower

41

ash container

43

suction

44

cyclone

51

control unit

52

control unit

61

compressor

62

Compressed air supply for cleaning

71

parting plane

73

upper element

74

lower element

Claims (21)

Additional arrangement for a firing device (10) with a supply device for the fuel pieces from a bearing (20) to the firing device (10),
characterized,
in that the supply device has a fuel piece buffer (31),
that the intermediate store (31) is arranged in a tower (30) which can be set next to the firing device (10), and
in that a delivery path (24, 12) is provided from the intermediate store (31) to a burner (11) of the firing device (10). Additional arrangement for a firing device according to claim 1,
characterized,
in that a suction device (33) for sucking the pieces of fuel out of the bearing (20) into the intermediate store (31) is arranged in the tower (30). Additional arrangement for a firing device according to claim 2,
characterized,
in that the suction device (33) sucks the pieces of fuel through a cyclone (34) in which they are deposited and fall into the buffer (31). Additional arrangement for a firing device according to one of the preceding claims,
characterized,
that a suction device (43) is provided, the ash particles from the firing device (10) in the output elements of a combustion chamber of the burner (11) sucks
in that the suction device (43) is arranged in a tower (40) of the additional arrangement that can be set next to the fire device (10), and
that this tower (40) has an ash container (41). Additional arrangement for a firing device according to claim 4,
characterized,
that the suction device (43) sucks the ash particles via a cyclone (44), in which they are separated from the flue gases and fall into the ash container (41). Additional arrangement for a firing device according to one of the preceding claims,
characterized,
that a compressor (61) is provided, which is arranged in one of the towers (30, 40), and
in that the compressor presses compressed air (62) into the region of the input elements of the combustion chamber of the burner (11) of the firing device (10). Additional arrangement for a firing device according to one of the preceding claims,
characterized,
that exactly one tower (30) is provided, in which all the suction devices (33, 43) and optionally all the cyclones (34, 44) are arranged one above the other. Additional arrangement for a firing device according to one of the preceding claims,
characterized,
in that a common suction device (33, 43) is provided, which regulates by means of a control device (51, 52) at different times either the fuel pieces from the bearing (20) into the buffer (31) or the ash particles from the output elements of the combustion chamber of the Burner (11) of the firing device (10) in the ash container (41) promotes. Additional arrangement for a firing device according to claim 8,
characterized,
that a switching mechanism or a circuit of changeover valves for the common suction device is provided. Additional arrangement for a firing device according to claim 9,
characterized,
that a common cyclone (34, 44) is provided, via which the common suction means (33, 43) sucks. Additional arrangement for a firing device according to one of the preceding claims,
characterized,
in that a filter is provided at the cyclone or cyclones (34, 44) for the protection of the suction devices (33, 43). Additional arrangement for a firing device according to one of the preceding claims,
characterized,
that the intermediate memory (31) in the tower (30) is arranged in approximately the same height as the torch (11) in the firing device (10). Additional arrangement for a firing device according to one of the preceding claims,
characterized,
that the conveying path (24, 12) of the latch (31) to the burner (11) comprises a metering screw (24). Additional arrangement for a firing device according to one of the preceding claims,
characterized,
that the conveying path (24, 12) from the buffer store (31) to the burner (11) has a receptacle (25) for a conveying element, in particular for a metering screw (24) or an ascending screw. Additional arrangement for a firing device according to claim 14,
characterized,
that the receptacle (25) in the conveying path (24, 12) is designed to be flexible and offers an angle adjustability of the conveying element, in particular the ascending screw or metering screw (24). Additional Anannung for a firing device according to claim 15,
characterized,
in that the flexible receptacle (25) has a rubber reducing sleeve. Additional arrangement for a conveying device according to one of the preceding claims,
characterized,
in that the conveying path (24, 12) from the intermediate store (31) to the burner (11) has a safety protective tube which melts under the action of heat and interrupts the conveying path (24, 12). Additional arrangement for a conveying device according to one of the preceding claims,
characterized,
that the intermediate memory (31) and / or the ash container (41) comprise level sensors. Additional arrangement for a conveying device according to one of the preceding claims,
characterized,
that the tower (s) (30, 40) is / are equipped with height-adjustable feet. Additional arrangement for a conveying device according to one of the preceding claims,
characterized,
that the one or more towers (30, 40) is provided with a sound insulation partially or completely. Additional arrangement for a conveying device according to one of the preceding claims,
characterized,
that the tower or towers (30, 40) are modular and
in that the tower or towers (30, 40) at a dividing plane (71) are sucked into a lower element (74) with a suction device (43) which draws ash particles from the firing device (10) and an upper element (73) with a buffer (31) for fuel pieces is divided.

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