DE202014105238U1 - Mobile solid fuel firing system - Google Patents

Abstract

Mobile solid fuel combustion system (2) with a heat exchanger (6), a combustion unit (4), a flue gas feed (26) from the combustion unit (4) to a hot side of the heat exchanger (6), an ambient air duct (32) through a cold side of the heat exchanger (6 ) and a blower (20) for driving ambient air through the cold side of the heat exchanger (6), characterized in that the combustion unit (4) has a horizontal burner (60) with a first combustion chamber (40) which surrounds a combustion floor (44) and has a side exit to an afterburner (46).

Description

The invention relates to a mobile solid fuel combustion system comprising a heat exchanger, a combustion unit, a flue gas supply from the combustion unit to a hot side of the heat exchanger, an ambient air flow through a cold side of the heat exchanger and a fan for driving ambient air through the cold side of the heat exchanger.

The weight of a mobile solid fuel combustion system is an important criterion for the handling of a transport on the one hand and for their solidity, since at a very high weight by shaking and hitting during transport large forces occur within the system.

It is an object of the present invention to provide a relatively lightweight mobile solid fuel firing system.

This object is achieved by a mobile solid fuel firing system of the type mentioned, in which the firing unit according to the invention comprises a horizontal burner with a Erstbrennraum, which surrounds a combustion bottom and has a lateral output to a Nachbrennraum.

The invention is based on the consideration that a compact firing can be achieved if the solid fuel lying on a firing floor is over-blown with combustion air in the lateral direction and the flue gas is discharged in the lateral direction. It can be supplied with enough oxygen on a large firing surface much fuel at the same time flat combustion chamber. The compactness makes it possible to produce a high performance, low weight burning unit.

The firing system is a mobile firing system, which is therefore intended to be transported by a vehicle to its place of use, operated there and later operated again at another site. For this purpose, the combustion plant expediently comprises a load-bearing construction and a lifting element, which is prepared to lift the entire furnace by means of a lifting device on the lifting element. The lifting element may be an insert for a forklift, an upper attachment for a cable suspension of a crane or the like, so that the furnace can be raised and parked, for example, on a loading area. In particular, inserts for standardized forks of a forklift are advantageous. The load-bearing construction expediently comprises a support frame with supports to which side walls are fixed in a housing-like manner. It is also possible that the carrier are formed by folds of housing-forming wall panels.

In order to achieve an easier movement of the firing system on site, it is advantageous if the firing system has its own drive unit with wheels. Practical are four wheels. For a safe stand during operation wheels are only on one side of the plant, e.g. two wheels, sufficient, connected to a non-rolling support unit, e.g. a wheelless support foot. With one or more handles, such as a grab bar on the ambient air inlet side, the furnace can easily be moved manually.

The solid fuel burning plant is expediently a combustion plant prepared for the combustion of a biofuel, ie a non-fossil fuel. Particularly advantageous is a wood-burning plant for use with, for example, wood chips or pellets. Accordingly, the solid fuel burner is made to burn solid, especially wood, and includes a fuel supply with an automatic feed unit for automatically feeding fuel into the firing unit, e.g. on the firebox. A feed motor of the feed unit can be controlled by a control unit, in particular depending on a combustion parameter, such as the combustion temperature, the exhaust gas temperature and / or the hot air temperature.

The heat exchanger is expediently a gas-gas heat exchanger with a hot side through which hot flue gas is passed from the combustion during operation of the mobile solid fuel firing system, and a cold side through which, for example, ambient air from the environment of the solid fuel firing system is guided and heated there. Subsequently, the hot air from the furnace can be blown, for example, into the environment or an air hose.

The ambient air duct may lead from an ambient air inlet in the outer casing of the firing system through an ambient air supply and further through the cold side of the heat exchanger, through an ambient air discharge to a hot air outlet in the outer casing of the firing system. In the ambient air inlet - or at a distance to a fan radius to - the ambient air blower is expediently arranged, which presses the ambient air into the housing of the furnace and back out of this. The ambient air duct runs through the heat exchanger and in particular also at least partially around the firing unit in order to cool it as well. The ambient air inlet and the hot air outlet are expediently in arranged opposite sides of the outer casing of the furnace.

The firing unit comprises the first combustion chamber and the afterburner. The horizontal burner comprises the Erstbrennraum and may - depending on the version - also include the afterburner. The horizontal burner is characterized by the side exit of the first combustion chamber, or the two laterally juxtaposed combustion chambers, so that in a combustion, the flames from the Erstbrennraum laterally out and hit the Nachbrennraum.

The Erstbrennraum includes the combustion floor, which is suitably arranged completely in Erstbrennraum. The firing floor is the area of the horizontal burner on which unburned solid fuel is located and continues to burn there, if necessary, except for glutters flying away, which further burn or anneal in the afterburner space.

The boundary between the first combustion chamber and the afterburner may be defined by the secondary air supply. Thus, the afterburner is expediently free of a combustion air supply from the outside. Thus, the boundary at the lateral end of the secondary air supply may be in the Erstbrennraum. Another criterion may be the hearth, ends at the lateral end of Erstbrennraum. A stage may also define the boundary between the first combustion chamber and the afterburner. This step or depression or opening expediently leads to an ash collecting unit in which the ashes formed by the combustion are collected. Such a step, opening or depression can thus form the boundary of the combustion region on which the combustion of the solid fuel takes place during operation of the solid fuel combustion system or which is provided for this purpose.

In a compact horizontal burner, the problem of insufficiently complete combustion may occur so that the emission of pollutants, especially carbon monoxide, is in an undesirably high range. Such a problem occurs in particular when the flames striking the first combustion chamber have too much opportunity to spread upwards and / or in their cross-section. The combustion cools down too much and does not occur in the desired completeness.

In order to avoid this, it is advantageous if the extent of the afterburner remains limited upwards. Conveniently, the extent of the afterburner upwardly from the top of the first combustion chamber is less than the vertical height of the first combustion chamber. This is especially true for the distance from Erstbrennraum to the beginning of the hot side of the heat exchanger or up to a flue gas discharge from Nachbrennraum to the hot side of the heat exchanger out. The upper edge of the Erstbrennraums is suitably measured at the transition to Nachbrennraum or it is an average height of Erstbrennraums used as the top edge height. Further advantageous are smaller dimensions, in particular only up to a maximum of 2/3, 1/2, 1/3, or in particular to a maximum of 1/10 of the height of the Erstbrennraums. The height of the Erstbrennraums may be the cross-sectional height of the Erstbrennraums in the transition to Nachbrennraum or an average height of Erstbrennraums.

In order to counteract an expansion of the flames after emerging from the first combustion chamber, it is advantageous if the flow cross section of the afterburner is less than three times, in particular less than twice, the flow cross section of the first combustion chamber. The flow cross-section can be seen perpendicular to the main flow direction of the flue gas through the afterburner. Conveniently, the flow cross section of the Nachbrennraums is at most three times or twice the flow cross section of the Erstbrennraums over a distance that is equal to the horizontal extent of the Erstbrennraums, in particular from the transition of Erstbrennraums to Nachbrennraum. Of course, it is also possible that the flow cross section in the transition from Erstbrennraum to Nachbrennraum and within the entire Nachbrennraums remains the same or even decreases. Advantageously, the cross section of the afterburner is less than three times, in particular twice, the flow cross section of the first combustion chamber until the beginning of the hot side of the heat exchanger. The flow cross section of the first combustion chamber may be the flow cross section at the transition of the first combustion chamber to the afterburner or an average flow cross section may be measured over the entire first combustion chamber.

In the heat exchanger, the hot flue gas is strongly cooled and its heat is transferred to the air flowing through the cold side of the heat exchanger ambient air. Until it enters the heat exchanger, the flue gas should therefore have passed through as complete a combustion as possible, since the further combustion is essentially prevented by the strong cooling in the heat exchanger. In order to achieve a good and as complete as possible combustion before the entry of the flue gas into the heat exchanger, it is advantageous if a horizontal distance from Erstbrennraum to the beginning of the hot side of the heat exchanger at least as is long, as the horizontal extent of Erstbrennraums in flame direction.

In order to achieve a sufficiently complete combustion of the flue gas in the afterburner, it may be sufficient that a smoke outlet of the afterburner is located opposite the side exit of the first combustion chamber to the afterburner. The flue gas must therefore at least substantially completely traverse the afterburner space, so that there is sufficient opportunity for hot afterburning.

A good combustion or afterburning, it is beneficial if the afterburner is separated by a false ceiling in a subspace and an overlying upper space and the flue gas path from the subspace around the false ceiling around. Appropriately, the flue gas path in the upper space runs in the opposite direction as in the subspace.

Particularly advantageous is a course of the flue gas path in the afterburner in an S-curve. An S-curve comprises at least two curves over a curve angle of at least 120 °, in particular at least 150 °. The S can be arranged lying or standing, so there may be at least two substantially horizontal separating elements for a stationary S or substantially vertical separating elements for a horizontal S in the afterburner.

An expansion of the flue gas so that its excessive cooling can be avoided by a combustion chamber ceiling from Erstbrennraum in the Nachbrennraum inside, which runs continuously from the Erstbrennraum and expediently throughout the entire afterburner up and / or horizontally. Small steps up to approximately 20% of the vertical first combustion chamber diameter are irrelevant here.

Advantageously, an ash bottom is arranged in the direction of the flue gas behind the firing floor. Between the hearth and the ash floor can be one step down, so that during operation the ash falls down over the step. The ashes may be pushed over the step by the pushing ash or blown down the step into the ash floor by another unit, such as a powerful blower. The ash bottom can be arranged in the afterburner or under the afterburner.

In order to avoid excessive expansion of the afterburning space downwards, the ash bottom can be arranged at at least substantially the same height as the firing floor. Regardless of its arrangement, it is advantageous if it has openings that lead into an ash collection container. The ash can be discharged without having to open the afterburner too much downwards, so that its cross section is increased too much. The cross section of an ash collecting space is expediently not calculated to the cross section of the afterburner.

Fabrication of an effectively burning fuel assembly may be kept simple when the first combustion chamber extends into the afterburner. The Erstbrennraum may be surrounded at the top and bottom of the afterburner, be suitably surrounded all around by Nachbrennraum, expediently, only the rear part of the Erstbrennraums is surrounded by Nachbrennraum. A good ash discharge, it is beneficial if the Erstbrennraum down openings in the Nachbrennraum inside and / or has an ash collection.

In the event of a malfunction, it may be advantageous to stop the combustion in the combustion unit as quickly as possible. This can be achieved by tearing apart the burning solid fuel, for example by means of a pressure surge. For this purpose, the firing unit expediently comprises a quenching unit that is prepared to tear apart burning solid fuel lying on the firing floor.

For this purpose, the extinguishing unit advantageously comprises a compressed air outlet in the first combustion chamber, which may be connected to a turbine, a compressor or the like.

In order to keep the heat for the most complete combustion possible in the afterburner, it is advantageous if the afterburner is clad on at least one side wall with combustion stones. Suitable stones are, for example, firebricks.

The invention is also directed to a method for generating hot air by means of a mobile solid fuel firing system in which solid fuel is burned in a firing unit, resulting from the combustion flue gas is guided by a flue gas supply from the firing unit to the hot side of a heat exchanger and the solid fuel firing system surrounding air using a Blower is blown through the cold side of the heat exchanger.

Advantageously, the solid fuel is burned on a hearth in a Erstbrennraum a horizontal burner of the fuel assembly, and the flue gas is through a lateral output of Erstbrennraums to a Nachbrennraum out and fed from there expediently by a flue gas discharge to the heat exchanger.

The previously given description of advantageous embodiments of the invention contains numerous features, which are given in the individual subclaims partially summarized in several. However, these features may conveniently be considered individually and summarized to meaningful further combinations. In particular, these features can be combined individually and in any suitable combination with the device according to the invention.

The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following description of an embodiment which will be described in detail in conjunction with the drawings. The embodiment is illustrative of the invention and does not limit the invention to the combination of features set forth therein, including functional features. In addition, suitable features of the embodiment may also be considered explicitly isolated and combined with any of the claims.

Show it:

1 1 a schematic representation of a solid fuel firing system with a firing unit, a heat exchanger and an outer casing around the firing unit and heat exchanger,

2 a firing unit having a first combustion chamber and a side afterburner and an overlying heat exchanger,

3 another firing unit with a downwardly expanding afterburner with a lower ash collection area,

4 a firing unit with an upwardly expanding afterburner with opposite exit to the heat exchanger,

5 a firing unit with an S-shaped flue gas duct through the afterburner,

6 a combustion unit with a flue gas duct in the form of a horizontal S and

7 a firing unit having a first combustion chamber extending into a secondary combustion chamber.

1 shows a schematic representation of a mobile solid fuel burning plant 2 , which is prepared for transport to several different locations. The solid fuel firing system 2 includes a firing unit 4 and a heat exchanger 6 in a transport unit 8th are stored. The transport unit 8th includes insertion openings at its lower end 10 for inserting the fork of a forklift. Side and top is the transport unit 8th formed by folds of the respective side panels or the plant ceiling formed, which together with the ground a transport-stable and weatherproof outer housing 12 form. In order to ensure good mobility on site, the solid fuel firing system 2 with a wheel system with four wheels 14 equipped, of which the two rear wheels 14 a swivel mechanism 16 for turning the wheels 14 to have a vertical axis. To push or pull the solid fuel firing system 2 is a handle 18 over an ambient air blower 20 present, preferably over the entire width of the rear wall of the outer housing 12 extends.

1 shows the solid fuel firing system 2 in a highly simplified and schematic manner, with essential elements, which are not essential to the explanation of the invention, has been omitted for clarity. The mobile solid fuel firing system 2 has in this embodiment, a rated power of 50 kW and is solid fuel 22 , in particular wood, such as wood pellets, fueled. For this purpose, an unillustrated fuel storage with the solid fuel burning system 2 be connected via a fuel channel through which the solid fuel 22 to a fuel supply 24 arrives in 1 is shown only schematically. The fuel supply 24 includes a screw conveyor through which the fuel 22 - Controlled by an electrical control unit - automated into the burning unit 4 is transported.

The result of burning the solid fuel 22 emerging hot flue gases are upwards from the firing unit 4 discharged and through a flue gas supply 26 a hot side of the heat exchanger 6 supplied from above or from below. The flue gas is passed vertically or horizontally through the hot side of the heat exchanger 6 passed and reaches a flue gas fan 28 , That in the heat exchanger 6 cooled flue gas is from this by a flue gas discharge 30 from the solid fuel burning plant 2 blown out.

For removing the heat of combustion from the flue gas stream 32 is a flow of cooling air in an ambient air duct 34 guided. The cooling air is called outdoor air or ambient air through the ambient air blower 20 directly from the environment of Festbrennstofffeuerungsanlage 2 sucked off and into the outer housing 12 the solid fuel firing system 2 blown. The ambient air blower 20 is in an ambient air intake 36 of the outer casing 12 arranged. Inside the outer housing 12 Thus, there is an overpressure relative to the environment of the solid fuel combustion system 2 ,

The ambient air is in an ambient air supply from the ambient air intake 36 to the cold side of the heat exchanger 6 blown and heated in this with heat from the hot side. Then she places in an ambient air discharge the distance from the cold side of the heat exchanger 6 up to a warm air outlet 38 of the outer casing 12 back and flows through this as warm air and is blown into the environment or a hose guide. The from the warm air outlet 38 blown heated ambient air is available with a maximum rated output of 50 kW, for example, for building drying. The burning unit 4 is cooled by the cooling air flow so that its outside temperature remains relatively cool and suitable for mobile use.

2 shows a burning unit 4a as used in the solid fuel burning plant 2 could be used. While in 1 the burning unit 4 with the reference numeral " 4 Is designated, the firing units are provided in the following figures with reference letters. Each of the embodiments of the 2 to 7 can as a burning unit 4 in the mobile furnace 2 out 1 be used. In the following embodiments, analog units are provided with the same reference numerals and different reference letters. If the reference letter is omitted, the corresponding description applies to all such analog units.

The burning unit 4a includes a first burn room 40a , in one side of a conveyor unit 42 the fuel supply 24 opens with a screw conveyor. The auger pushes the solid fuel 22 during operation of the solid fuel firing system 2 on a firing floor 44 that completely within the first burn room 40a is arranged. There burns the solid fuel 22 as if by the flames in 2 is indicated. The first burning room 40a suitably has a rectangular or polygonal cross-section with more than four sides or corners, for example, an octagonal cross-section.

Opposite the fuel supply 42 is the first burning room 40a laterally open and flows into a afterburner 46a Into the flames of the first burning room 40a hit in laterally. On his first burn 40a opposite side is the afterburner 46a opened to the top and opens into the heat exchanger 6a , After passing through two trains up and down the cooled flue gas leaves the solid fuel firing system 2 upwards through the flue gas discharge 30 ,

The combustion air becomes that in the firing unit 4a occurring combustion supplied in two ways. Primary air is supplied by a primary air blower 48 from the environment of the solid fuel burning plant 2 aspirated and via a primary air supply 50 blown laterally into the combustion. Secondary combustion air is via a secondary air supply 52 , For example, an opening to the outside, sucked and all around in the Erstbrennraum 40a guided. About a channel 54 this is the secondary air around the Erstbrennraum 40a and then in a tubular guide 56 the length and around from radially outside to inside through a plurality of not shown opening in the Erstbrennraum 40a guided. A fan is not necessary for this, because of the flue gas fan 28 in the burning unit 4a Vacuum generated sucks the ambient air through the opening 52 one. Through the air supply and the suction of the flue gas blower 28 the flames become in a flame direction 58 laterally from the Erstbrennraum 40a in the afterburner 46a pressed or pulled.

In the afterburner 46a The flames stay focused so that the combustion in the afterburner 46a stays hot and can be done completely enough. The proportion of unwanted combustion products, such as carbon monoxide, remains sufficiently low.

Through the laterally opened Erstbrennraum 40a The flames are essentially horizontal from the first combustion chamber 40a driven out. In this respect, form the Erstbrennraum 40a , the fuel supply 42 and the two air inlets 50 . 52 a horizontal burner 60 with one, at least at the end of the Erstbrennraums 40a , horizontal flame orientation.

The transition from Erstbrennraum 40a to the afterburner 46a will be at the in 2 illustrated embodiment through the lateral end of the secondary air duct 56 educated. In 2 this transition is represented by a dot-dash line. Up to this line, secondary air is blown into the combustion from outside to radially inside. The afterburning room 46a is free from a combustion air supply from the outside, so that there takes place combustion with combustion air from the Erstbrennraum 40a is fed.

The burning floor 44 flows in the area of the transition from Erstbrennraum 40a to the secondary combustion 46a in an ash floor 62a , where the burning floor 44 and the ash floor 62a , in particular the entire bottom of the afterburner 46a to be at the same height. Also the ceiling 64a of the afterburning room 46a is at the same height as the ceiling of Erstbrennraums 40a , In this respect, the vertical extent of the cross section of the flue gas stream increases 32 in the transition from Erstbrennraum 40a to the afterburner 46a Not. This expediently also applies to the horizontal extent of the flow cross section. The flow cross section is perpendicular to the flame direction 58 to see and can for simplicity both in Erstbrennraum 40a as well as in the afterburner 46a considered to be vertical for the sake of simplicity over the entire length of horizontal flame direction seen 58 ,

3 shows a further embodiment of a firing unit 4b , The descriptions of the following exemplary embodiments are essentially limited to the differences from the respective preceding exemplary embodiments, to which reference is made with regard to features and functions that remain the same. In order not to have to carry out several times already described, all the features of a preceding embodiment are generally taken over in the following embodiment, without being described again, unless features are described as differences from the preceding embodiments.

In contrast to the embodiment of 2 includes the firing unit 4b a afterburner 46b whose ash bottom 62b lower than the hearth 44 of the first burning room 40b , In the transition from Erstbrennraum 40b to the afterburner 46b In this respect, the flow cross-section of the flue gas increases. The magnification is about 200%, as well as the lateral extent of the Nachbrennraums 46b is greater than that of Erstbrennraums 40b , However, the extent of the combustion zone associated therewith is justifiable in terms of incineration completeness since the flames are in transition from the first combustion chamber 40b to the afterburner 46b can not escape to the top. The heat collects on the ceiling 64b so that there is enough heat for good combustion. Through the stage 66b the ashes collect 68 in the depression of the afterburning room 46b and can be easily removed from there.

The transition from Erstbrennraum 40b to the afterburner 46b can - as shown by the left of the two dashed lines in 3 is indicated - again be seen at the lateral end of the secondary air supply. Also possible is the border - as indicated by the right-hand dotted line in 3 is indicated - at the stage 66b to see, so at the transition, at which the flow cross-section significantly increases.

4 shows another example of a burning unit 4c in which the afterburning room 46c extended up and down is relative to Erstbrennraum 40c , Here, the flames can expand upwards and also laterally, so that a cross-sectional enlargement of about 500% in the transition between the Erstbrennraum 40c and the afterburner 46c occurs. Although this results in a noticeable cooling of the combustion within the Nachbrennraums 46c on. Due to the wide horizontal distance of the output 70 of the afterburning room 46c to the hot side 72 of the heat exchanger 6b However, there is enough distance for a sufficient afterburning available before the hot flue gas in the hot side 72 is cooled too much. The distance is about 120% of the length of Erstbrennraums 40c in horizontal flame direction 58 , The smoke exit 70 of the afterburning room 46c is so far compared to the lateral output of Erstbrennraums 40c to the afterburner 46c ,

The afterburning room 46c Expands upwards relative to the first burn room 40c out. This extent is about 30% of the vertical height of the first combustion chamber 40c , This expansion is relatively small, so that a too large expansion of the flames and thus a large cooling of the combustion in the afterburner is counteracted.

To the heat in the afterburner 46c To keep it sufficiently large, this is on one or more sides with Brennkammersteinen 74 lined. Here is the arrangement of the combustion chamber stones 74 on the wall of the afterburner 46c advantageous from that in the ambient air duct 34 guided ambient air is blown. This is in 4 the right side, as through the combustion stone stones shown there 74 is shown. The combustion stone stones 74 are expediently fireclay bricks, which are arranged in several rows on the corresponding wall.

Due to the extent of the afterburner 46c upwards there is less space available, so that the heat exchanger 6b - in contrast to the heat exchanger 6a with vertically erected plates or tubes - is a plate heat exchanger with horizontal plates. Between the superimposed plates are air spaces between which the ambient air can flow through and heat up.

The heat exchanger 6 lies above the afterburner 46 , where for reasons of space, the heat exchanger 6 not or only insignificantly, for example, after one or more sides by a maximum of 10% of its corresponding extent, laterally over the afterburner 46 extends. The flue gas path leads through the heat exchanger in an S-shape 6 ,

At the in 5 illustrated embodiment is the afterburner 46d designed substantially as in the previous embodiment, but it includes a false ceiling 76 , in the 5 is drawn through, the rear end of which flows around the flames or the hot flue gas. The false ceiling 76 separates a subspace below 78 from an overhead upper room 80 so that the flames or the hot flue gas first through the subspace 78 , then around the edge of the false ceiling 76 around and then through the upper room 80 stream. The flow direction in the upper room 80 is in the opposite direction to the flow in the subspace 78 ,

At the in 5 illustrated embodiment, it is possible, several false ceilings 76 to provide one above the other, with the upper false ceilings 76 are optional, as indicated by the dashed representations. At the in 5 illustrated embodiment, the flue gas path is S-shaped with three opposing S-legs in the upper space and the lowest S-leg in the subspace 78 , Through this special long flow path of the flue gas or the flames from Erstbrennraum 40d to the hot side 72 of the heat exchanger 6b There is a very complete combustion with low pollutants in the exhaust gas.

A variation of the S-shaped flow guide 5 is in 6 shown. The afterburner shown there 46e has two or more partitions 82 on, which are perpendicular in this embodiment. The first of the two partitions 82 , the more the first burn 40e facing, leaves a gap up to the ceiling 64e for the passage of the flames or the flue gas open. The following partition 82 Leaves a gap down to the ground 62e so that the hot flue gases can pass through there. In this way, an S-shaped flue gas flow is achieved with a lying "S". Also by this - even if not quite as streamlined - a long flue gas path is achieved with sufficiently small flow cross-section, so that a sufficiently complete combustion takes place.

7 shows a burning unit 4f in which the first burning room 40f - And also the secondary air supply 56 , but only on the top of Erstbrennraums 40f - in the afterburner 46f are led into it. As a result, the combustion is also in the in the afterburner 46f in extended part of Erstbrennraums 40f nourished with oxygen, so that an oxygen-rich and thus complete combustion is favored.

The burning floor 44 goes into the ash floor 62f over, with a first opening 84 a border between the hearth 44 and the ash floor 62f forms. The opening 84 allows a passage of ash 68 from the first burning room 40f in an ash chamber 86 from which the ashes 68 can be easily removed. The ash floor 62f contains a variety of openings, so the ashes 68 that of solid fuel 22 on the ash floor 62f is pushed, gradually completely through the openings 84 down to the ash chamber 86 falls, as in 7 through the ash becoming less and less to the right 68 is indicated. The cross section of the first combustion chamber 40f Maintained over its entire horizontal length, so that the combustion is concentrated and thus remains hot.

During operation of the solid fuel firing system 2 is through the fuel supply 42 fuel 22 on the firebox 44 pushed. By means of an ignition unit, not shown, the fuel 22 lit and the combustion is started. Through the two combustion air supply lines 50 . 52 the combustion is fanned and the rated power of the solid fuel combustion system 2 is achieved. The solid fuel 22 burns to ashes 68 and becomes from the advancing solid fuel 22 that of the fuel supply 42 further into the first burning room 40 is inserted, in the direction of the afterburner 46 pushed. At the beginning or in the afterburner 46 For example, the ashes fall over the step 66 or through the openings 84 on the ash floor 62 or in the ash chamber 86 ,

The hot flue gases, and hereby also the burning gases in the flames, flow out of the first combustion chamber 40 out the side and get into the afterburner 46 , From this they flow through the flue gas outlet 70 in the hot side 72 of the heat exchanger 6 , In the afterburner 46 There is a post-combustion of the combustion / flue gases, so that a sufficiently complete combustion of the combustion or flue gases is achieved. In the heat exchanger 6 The flue gases release most of their heat to the ambient air, through the blower 20 through the cold side of the heat exchanger 6 is blown.

In the event of a malfunction, it may happen that the combustion in the first combustion chamber should be extinguished as quickly as possible. This is the primary air blower 48 designed such that it in a surge of the burning solid fuel 22 can tear apart and expediently in the afterburner 46 promoted. There goes the solid fuel 22 relatively quickly. Alternatively or additionally, it is possible in the primary air supply 50 to connect another air source, such as a turbine, a compressor or a compressed air tank. Instead of the primary air supply 50 may also have another feeder in the first burn room 40 to get voted. In this respect, such a compressed air supply, for example, the primary air blower 48 , as a deletion unit 88 be considered.

LIST OF REFERENCE NUMBERS

2

Festbrennstofffeuerungsanlage

4a-f

burning unit

6a-b

heat exchangers

8th

transport unit

10

insertion opening

12

outer casing

14

wheel

16

swivel mechanism

18

Handle

20

Ambient air blower

22

solid fuel

24

fuel supply

26

Smoke gas supply

28

Flue gas fan

30

Flue gas extraction

32

Flue gas stream

34

Ambient air duct

36

Ambient air intake

38

Hot air outlet

40a-f

Erstbrennraum

42

delivery unit

44

burning ground

46a-f

secondary combustion

48

Primary air fan

50

Primary air supply

52

Secondary air supply

54

channel

56

guide

58

flame direction

60

Horizontal burner

62a-f

ash soil

64a-e

blanket

66b-b

step

68

ash

70

output

72

hot side

74

combustion chamber brick

76

false ceiling

78

subspace

80

upper room

82

partition wall

84

opening

86

ash chamber

88

extinguishing unit

Claims (15)

Mobile solid fuel burning plant ( 2 ) with a heat exchanger ( 6 ), a firing unit ( 4 ), a flue gas feed ( 26 ) from the burning unit ( 4 ) to a hot side of the heat exchanger ( 6 ), an ambient air duct ( 32 ) through a cold side of the heat exchanger ( 6 ) and a blower ( 20 ) for driving ambient air through the cold side of the heat exchanger ( 6 ), characterized in that the firing unit ( 4 ) a horizontal burner ( 60 ) having a Erstbrennraum ( 40 ), which has a firing floor ( 44 ) and a side exit to an afterburner ( 46 ) having. Mobile solid fuel combustion system according to claim 1, characterized in that an extension of the afterburner space ( 46 ) from the top of the first combustion chamber ( 40 ) upwards within the distance from the first combustion chamber ( 40 ) to the beginning of the hot side of the heat exchanger ( 6 ) less than the vertical height of the first combustion chamber ( 40 ) is. Mobile solid fuel burning plant ( 2 ) according to claim 1 or 2, characterized in that the Erstbrennraum ( 40a ) in the flame direction ( 58 ) has a flow cross section and the flow cross section of the afterburner space ( 46a ) from the transition of the Erstbrennraums ( 40a ) to the afterburning room ( 46a ) over a distance of at least the horizontal extent of the first combustion chamber ( 40a ) is less than double. Mobile solid fuel burning plant ( 2 ) according to claim 3, characterized in that the cross section until the beginning of the hot side of the heat exchanger ( 6 ) is less than twice. Mobile solid fuel burning plant ( 2 ) according to one of the preceding claims, characterized in that a horizontal distance from Erstbrennraum ( 40a -E) until the beginning of the hot side of the heat exchanger ( 6 ) is at least as long as the horizontal extent of the Erstbrennraums ( 40a -E) in the flame direction ( 58 ). Mobile solid fuel burning plant ( 2 ) according to one of the preceding claims, characterized in that a flue gas outlet ( 70 ) of the afterburning space ( 46a , b, e, f) with respect to the lateral exit of the first combustion chamber ( 40a , b, e, f) to the afterburning room ( 46a , b, e, f). Mobile solid fuel burning plant ( 2 ) according to one of the preceding claims, characterized in that the afterburning space ( 46d ) through a false ceiling ( 76 ) into a subspace ( 78 ) and an overlying and upper space ( 80 ) is separated and the flue gas path to the False ceiling ( 76 ) around and in the upper room ( 80 ) in the opposite direction as in the subspace ( 78 ) runs. Mobile solid fuel burning plant ( 2 ) according to one of the preceding claims, characterized in that the flue gas path in the afterburner ( 46d ) goes up in an S-curve. Mobile solid fuel burning plant ( 2 ) according to one of the preceding claims, characterized in that the combustion chamber ceiling ( 64a , b) from the first combustion chamber ( 40a , b) through the entire afterburner space ( 46a , b) runs horizontally. Mobile solid fuel burning plant ( 2 ) according to one of the preceding claims, characterized in that in the flue gas direction ( 58 ) behind the burning floor ( 44 ) an ash bottom ( 62b ) is arranged, which has a step down, over which ash is inserted by nachschängende ash in operation. Mobile solid fuel burning plant ( 2 ) according to claim 10, characterized in that in the flue gas direction ( 58 ) behind the burning floor ( 44 ) an ash bottom ( 62f ), the openings ( 84 ) in an ash collecting container ( 86 ) to lead. Mobile solid fuel firing system according to one of the preceding claims, characterized in that the first combustion chamber ( 40f ) in the afterburner ( 46f ). Mobile solid fuel burning plant ( 2 ) according to claim 12, characterized in that the Erstbrennraum ( 40f ) down openings ( 84 ) in the afterburner ( 46f ) having. Mobile solid fuel burning plant ( 2 ) according to one of the preceding claims, characterized in that the firing unit ( 4 ) a deletion unit ( 88 ) prepared to be placed on the hearth ( 44 ) burning solid fuel ( 22 ), and the one compressed air outlet in the Erstbrennraum ( 40 ) which is connected to a turbine. Mobile solid fuel burning plant ( 2 ) according to claim 14, characterized in that the afterburning space ( 46c F) on at least one side wall with Brennkammersteinen ( 74 ) is disguised.

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