DE102009042104A1 - Wood gas boiler has star that is arranged in range of fire bed, where star is rotated around central vertical axis and is provided with multiple wings - Google Patents

Abstract

The wood gas boiler (2) has a star (44) that is arranged in a range of fire bed (12), where the star is rotated around a central vertical axis (4). The star is provided with multiple wings (46) and is extended on a boiler wall (10). The star is surrounded by a border (54) and it has openings for retaining outer ends of the wing.

Description

• – bei dem innerhalb einer Kesselwand und oberhalb eines Kesselbodens eine Einrichtung zur Luftzufuhr, eine Glocke und darunter ein Rost angeordnet sind,
• – bei dem das auf dem Rost aus Holzschnitzeln in einem Glutbett erzeugte Holzgas absaugbar und nach außen abführbar ist, und
• – bei dem die aus dem Glutbett anfallende Asche nach Durchtritt durch den Rost vom Kesselboden aus ebenfalls nach außen abführbar ist.

The invention relates to a wood gas boiler,

• - in which a device for supplying air, a bell and, beneath it, a grate are arranged inside a boiler wall and above a boiler bottom,
• - In which the wood gas generated on the grid of wood chips in an ember bed is sucked and discharged to the outside, and
• - In which the resulting from the ember bed ash after passing through the grate from the bottom of the boiler is also discharged to the outside.

Nowadays, wood gasifiers are used either to supply surplus wood to a useful use as wood gas or to use the generated wood gas to power machines. In any case, the generated wood gas should be as pure as possible. The amount of impurities contained in the wood gas, especially tar, should be as low as possible so as not to pollute the environment. Moreover, disposal of such contaminants should not be required.

So it is important in a wood gas boiler, in particular, that as little as possible during production of the wood gas, if possible no tar is produced. Because by tar glued the downstream cleaning system as well as the connected machine. But even for the wood gas boiler itself is due to the risk of sticking a certain probability of functional impairment. The danger of the production of tar exists in particular with an angular construction of the Glutzone. The air supply is not uniform there, so that in the corners cold zones arise in which tar can form or settle. In addition, it is desirable that the wood gas boiler has the highest possible conversion efficiency of wood chips in wood gas. In conventional wood gas boilers, there is a real danger that after some time the glow zone will become clogged with fine carbon particles. Then the volumetric flow becomes lower and the conversion efficiency decreases considerably.

The object of the invention is to provide a wood gas boiler of the type mentioned in such a way that it delivers a largely tar-free wood gas in continuous operation with uniformly high conversion performance.

The invention is based on the consideration that this object can be achieved if the construction is chosen so that the wood gas is removed directly from the Glutzone and not only from its outer edge or from the surface.

• a) dass im Bereich des Glutbetts ein um eine zentrale Vertikalachse drehbarer Stern angeordnet ist, der eine Anzahl von Flügeln besitzt, – die sich sternförmig in Richtung auf die Kesselwand erstrecken, – die als Absaugkanäle zur Weiterleitung von Holzgas ausgebildet sind, – die in ihren Wänden jeweils eine Anzahl von Löchern zum Eintritt des Holzgases aus dem Glutbett besitzen, und – deren äußere Enden zum Austritt des Holzgases ausgebildet sind,
• b) dass der Stern von einer Einfassung umgeben ist, die Öffnungen zur Aufnahme der äußeren Enden der Flügel besitzt, so dass das aus den Enden der Flügel austretende Holzgas aus dem Bereich zwischen der Einfassung und der Kesselwand absaugbar ist, und
• c) dass die Einfassung bevorzugt mit dem Stern mitdrehbar ist.

The object mentioned is accordingly achieved according to the invention by a wood gas boiler, which is characterized

• a) that in the vicinity of the ember bed a rotatable about a central vertical axis star is arranged, which has a number of wings - which extend in a star shape towards the boiler wall, - which are designed as suction ducts for the transmission of wood gas, - in their Walls each have a number of holes for the entry of the wood gas from the ember bed, and - whose outer ends are formed to exit the wood gas,
• b) that the star is surrounded by an enclosure having openings for receiving the outer ends of the wings, so that the wood gas emerging from the ends of the wings is sucked out of the area between the enclosure and the boiler wall, and
• c) that the enclosure is preferably mitdrehbar with the star.

The presence of the rotatable star with its holes in the area of the ember bed allows a good dissipation of the resulting wood gas, so that a high conversion performance of wood chips in wood gas is possible.

The ember bed should be housed in a circular or cylindrical ember bed space.

According to a particularly advantageous embodiment, it is provided that the undersides of at least some of the wings are each formed with a scraping edge for ash and possibly sand. Ashes and sand are thereby caused to pass through the grate, so that there is a good broaching effect.

So that the holes in the wings do not clog easily, it is expedient if these holes are located at least two centimeters above the grate and are thus located in operation within the Holzglutzone. Also, an elongated formation of the holes has been found to be useful. The holes should preferably point upwards.

In a further development, it is provided that the star together with the enclosure is rotatable about a common vertical axis by means of a centrally arranged core tube. In this case, to drive the core tube, a drive ring, which is located below the grate, an electric motor, which is arranged outside the boiler wall, and be provided from the electric motor through the boiler wall into the boiler room reaching shaft.

In order to easily rectify faults, a motor should be selected, which can run either forwards or backwards.

It is basically not necessary that the star and the bezel rotate permanently. Accordingly, a further embodiment is characterized in that the star and the enclosure are rotatable at predetermined time intervals. Here, the star and the enclosure can be gradually rotated. In operation, a drive has been found that is designed such that the star and the bezel rotate for about one minute, after which about a quarter turn has been made, and then the star and the bezel for about 20 to 30 minutes long stay standing.

The wing shape should ensure that wood and embers do not stick to them during operation. Accordingly, a further development is characterized in that the wings are roof-shaped with two top, mutually inclined roof surfaces are formed, wherein the two roof surfaces of the wings are each provided with the holes for entry of the wood gas from the ember.

In order to facilitate easy outflow of the generated wood gas, it can be advantageously provided that the enclosure is provided with a number of openings for the passage of wood gas from the wood fire such that the wood gas enters the area between the enclosure and the boiler wall. From this area, it is then derived by means of a pump and another use, for. B. for driving a motor supplied.

Of course, the ash produced must be removed from the wood gas boiler from time to time. Accordingly, the bottom of the vessel should be provided with an ash passage opening, under which a device for removing the fallen ash, so for example an ash container, is arranged. This device should also expediently comprise a transport screw.

It has already been mentioned that to drive the core tube, a drive ring can be used, which is located below the grate. Here, a bearing tube may be rotatably mounted, are attached to the support arms of the drive ring.

Just above the bottom of the boiler can be attached to the lower portion of the bearing tube a co-rotating Ascheräumer for clearing the fallen ash in the direction of an ash passage opening. This ash shaker may be formed like a spider and a number of spaced clearing rods, z. B. round, rectangular or L-shaped cross-section, have.

The aforementioned bearing tube must in turn be stored so that it can not move back and forth in operation and remains in the center. For this purpose, a round disc may be attached to the bottom of the vessel, around which or in the centering hole of the bearing tube is rotatable.

To avoid a cold zone in the central region of the glow zone, an adjustment cylinder can be provided. This is preferably rotatable and slipped over the core tube.

Of particular importance is that the supply of air in the Glutzone with respect to the mentioned central axis is substantially uniform. This is achieved, for example, in a simple manner in that the ember bed is located in a glow chamber with a substantially cylindrical wall, in which a number of air nozzles are arranged distributed.

In order to enable virtually tar-free operation, not only the flow of the air supply but also the wood gas discharge should be substantially uniform with respect to the central axis.

In order to ensure a good conversion of the wood chips in wood gas, without these burn, the wood gas boiler should have at the top of a certain inlet for the wood chips entry lock, which allows airtight completion.

Embodiments of the invention will be explained in more detail below with reference to the drawing.

Show it:

1 the side view (with partial sectional view) of a vertically standing wood gas boiler,

2 the perspective side view of 5 inside stages of the wood gas boiler in an exploded view,

3 the perspective view of the second stage,

4 the perspective view of the third stage with a centrally located star with a number of wings, a mount and a central core tube,

5 the perspective view of the fourth stage with a grate and a surrounding retaining ring,

6 the perspective view of the fifth stage with a drive ring, including support structure with Ascheräumerarmen,

7 in cross-section the lower part of the wood gas boiler and

8th in perspective view the lower part of the wood gas boiler.

According to 1 has a wood gas boiler 2 a central vertical axis 4 , At the upper end there is an entrance lock 6 , by means of an airtight entrance woodchip h in the wood gas boiler 2 can be entered. The entrance lock 6 sits on a graduation cover 8th , Underneath is a cylindrical boiler wall 10 , within a pyrolysis zone 11 and below it a glowing zone 12 for the wood chips h are located. The boiler wall 10 belongs to one or forms a so-called herd use. The lower part of the wood gas boiler 2 is from an outside wall 14 surround. This has at least one inlet 16 for air and at least one outlet 17 for the generated wood gas g. The outer wall 14 in turn surrounds a boiler housing 18 , Between the boiler housing 18 and the boiler wall 10 there is a free space 20 into which the generated wood gas g flows from the central area and from which it flows via the at least one outlet 17 can be sucked off.

Inside the boiler wall 10 centrally lie a wedge-shaped upper Schamottring 22 including an air distribution pipe 24 of rectangular cross section and below a lower Schamottring 26 , The air distribution pipe 24 is at its periphery with a number of inwardly facing, equally spaced air nozzles 28 Mistake. The air distribution pipe 24 and the air nozzles 28 represent a facility 30 Of importance is that this facility 30 in the upper part of the glow zone 12 is arranged. The lower chamotte ring 26 lies on a chamotte ring 32 on, which causes a constriction of the cross section. Because the number of air nozzles 28 on the circumference of the cylindrical wall of the Glutzone 12 is arranged evenly distributed, results in a largely uniform air intake and temperature distribution.

Down below is centrally an upright core tube 34 intended. About this core tube 34 is a fitting cylinder from above 36 slipped up (to the top of the wing 46 enough). It serves to avoid cold zones in the central area. The adaptation cylinder 36 has a top lid attached 38 that with an eyelet 40 is provided for hooking when pulling out. Recognizable is the adjustment cylinder 36 from a bell 42 surround.

Of particular importance now is that in the area of the ember bed 12 one around the central vertical axis 4 rotatable star 44 with a number of wings 46 is provided. The wings 46 , z. B. 8 in number, are distributed symmetrically and extend in a star shape in the direction of the boiler housing 18 , As will become clear later, they each form a suction channel directed in its longitudinal direction for the transfer of wood gas g. They each have a number of holes in their walls 47 to the entry of the wood gas g from the ember bed 12 , And their outer end is used in each case to the exit of the absorbed wood gas g in the open space 20 , The wings 46 have scraping edges at their lower end 48 for sand and ashes a. When turning around the central vertical axis 4 Sand and ash become a in the slot-like holes 49 (S. 2 and 5 ) of a grate underneath 50 so that these substances can fall into the space below.

In the room underneath are hangers 52 for the rust 50 arranged. They embrace from below the later mentioned support arms 102 , are at the top end on the grate 50 welded and thus keep rust 50 and support arms 102 together.

The star 44 is of an annular mount 54 surround. This has roof-shaped openings for receiving the outer ends of the wings 46 , The mount 54 thus turns with the star 44 With. The mount 54 is with a number of breakthroughs 56 for the passage of wood gas g from the Holzglutzone 12 Mistake.

It had already been mentioned that the walls of each wing 46 a number of holes 47 to the entry of the wood gas g from the ember bed 12 have. So that can be done from the ends of the wings 46 escaping wood gas g in the area between the enclosure 54 and the boiler wall 18 enter. It can from there by means of a (not shown) suction device via the outlet 17 be sucked off. Because the enclosure 54 with a number of openings 56 is provided, the wood gas g can also from the ember bed 12 out into the area 20 between the mount 54 and the boiler wall 18 enter and be sucked from there.

It had already been mentioned that the star 44 around the vertical axis 4 is rotated during operation. For rotation is a drive ring or drive ring 60 provided by means of a number of star-shaped support arms 62 is held centrally. To drive the core tube 34 over the drive ring 60 which is below the grate 50 is located, an (not shown) electric motor is provided.

He is outside the boiler wall 14 arranged. In addition, one of the electric motor by the boiler wall 14 in the boiler room reaching drive shaft 67 provided, cf. 7 , In 1 is the entry hole 64 shown. The drive shaft 67 has a cross pin in this particular case 66 at its end, from below into a step 112 (see. 6 ) of the drive ring 60 intervenes. This makes it possible, the drive ring 60 and with it the star 44 continue to turn gradually.

In the lower part, just above the bottom of the boiler or bottom plate 68 , is an ash clearer 70 with a number of clearing arms 72 intended. These clearing arms 72 may have a round cross-section or, as in the present embodiment, an L-shaped cross-section. They end about one to two centimeters in front of the bottom of the kettle 68 so that between the clearing arms 72 and the bottom of the kettle 68 a cavity 74 is formed. The Asherreamer arms 72 make sure that the fallen ashes along with sand towards an ash passage 76 is pushed. From here it falls into an ash pan 78 from which they travel by means of a screw (not shown) in a screw tube 79 is transported to a (not shown) storage container.

For holding the boiler bottom or bottom plate 68 is a schematically indicated carrying cross 80 intended. This comprises a number of star-shaped arms.

Out 2 shows that the first (top) level the components 22 . 24 . 26 and 28 has. Below the evenly distributed holding elements 82 passing below through the ring 32 formed constriction is a wall 84 shown that is part of a labyrinth seal. This wall 84 belongs to a first or upper ring. Underneath is a second ring 86 which forms an outer seal.

Below the first stage are the second and third stages. These two steps rotate because they pass through the drive ring 60 are driven. The second stage includes the adjustment cylinder 36 and about a retaining ring 88 , The retaining ring 88 consists of an inner stabilizing ring 90 and an outer stabilizing ring 92 , The two rings 90 . 92 connect by welding star-shaped ribs 94 together. The retaining ring 88 sits at the top of the adjustment cylinder 36 , Through the ribs 94 and rings 90 . 92 Retention compartments are formed in which coarse charred pieces of wood chips are retained. The adaptation cylinder 36 is together with the restraint ring 88 removable.

In the third stage are again the individual wings 46 of the star 44 including holes in the walls 47 shown. Here it becomes clear that every wing 46 is roof-shaped. The two roof surfaces of the wings 46 are each with the holes 47 to the entry of the wood gas g from the ember bed 12 Mistake. The slit-like holes 47 are directed upwards. The open outer end of each wing 44 is each in the enclosure 54 anchored length-shiftable in consideration of the temperature influence.

It should be noted that in 2 the mentioned bell 42 not shown. To attach this bell 42 is a small edge in the first step below 96 provided at the top of the bell 42 is attached.

In order for the second stage to rotate with the third stage, it is approximately in the middle of the core tube 34 a driver 98 for the adjustment cylinder 36 intended. The adaptation cylinder 36 extends to the upper edge of the wings 46 ,

It should be emphasized that the first stage is fixed while the second and third stages are common around the vertical axis 4 to be turned during operation. The fourth step is again fixed. The fourth stage essentially shows the support structure for the grate 50 , After that lies the Asherost 50 , centrally held by a bearing sleeve 100 , on a number of carrying arms 102 , the star-shaped of the bearing sleeve 100 out. They are inside the bearing sleeve 100 welded. Its outer end is always in a slot 104 a retainer ring 105 , To account for the thermal expansion, the outer ends of the support arms 102 in these slots 104 not welded; they are only loosely inserted.

The lowest, fifth stage shows the drive ring or drive ring 60 which is star-shaped on a sleeve counter bearing 106 fortified carrying arms 62 is held. The support arms 62 are welded at the outer end. The sleeve counter bearing 106 sits on a bearing tube 108 , In the course of the support arms 62 are rectangular expansion members 110 appropriate. They serve the temperature compensation.

The drive ring 60 has a plurality of steps along its circumference 112 , About these stages 112 becomes the drive ring 60 gradually driven from below.

And on the bearing tube 108 is after 2 tangentially a large number of ash clearing arms at the ends 72 fixed. As already explained, these are L-shaped, ie formed angled. They clear ash a from the floor pan 68 in the ash container 78 from which the mentioned screw leads to the outside for the purpose of removing the ash a.

3 shows again the adjustment cylinder 36 with the upper lid 38 on which an eyelet 40 is moored. At the upper part of the adjustment cylinder 36 are the inner ends of the ribs 94 moored by an inner and outer stabilizing ring 90 respectively. 92 held together.

According to 4 is the core tube 34 top with a lid 35 closed. It has the driver below 98 for the adjustment cylinder 36 , Below a disc 114 is the star 44 that has a plurality of wings 46 having. The wings 46 serve as roof-shaped suction channels for the wood gas g. On both sides of the roof surfaces are the elongated holes or slots 47 appropriate. The lower sides of each wing 46 are arranged substantially vertically. The wings 46 are inside the core tube 34 welded. The star 44 is outside of the cylindrical enclosure 54 surround. The outer ends sit in a shaped according to the roof area breakthrough 116 of the mount 54 , The uniformity of form leads to a good seal. In the lower part of each breakthrough 116 becomes the counterpart through the herd insert 10 educated. The space shown between the core tube 34 and the mount 54 is full of wood embers in operation, and the wood gas g is practically out of the embers 12 sucked directly. Through the recesses in the enclosure 54 the wood gas g is also sucked off.

To drive at this point again said the following: At the bottom of the outer wall 14 occurs a drive shaft 67 in the boiler housing 18 , Their crossbolt 66 accesses from below into a step 112 of the drive ring 60 one. The drive shaft 67 is driven at intervals by an electric motor (not shown). The drive ring 60 drives over the carrying cross 80 from below the core tube 34 with a star 44 , The at the core tube 34 attached wings 46 turn over or on the grate 50 , together with the enclosure 54 , The wings 46 yes are in the lower roof-shaped openings of the enclosure 54 put in, with their ends.

The upper thinner edge or part 54a of the mount 54 serves together with the surface 54b as a seal. The counterpart is, as mentioned, the lower part 84 . 86 of the herd insert. The Elements 54a . 54b . 84 . 86 together form a labyrinth seal.

It is advantageous if the star 44 can be rotated forwards and backwards. If there is a lot of ash a, or if the elongated holes or slits 47 should be clogged on the roof surfaces, the latter are released when reversing the direction of rotation, so that the wood gas g can be sucked. This contributes to an increase in the yield of the wood gas boiler 2 at.

5 shows again the bearing sleeve 100 on which the support arms 102 of the ashtray 50 are welded. The retaining ring 105 that the rust 50 surrounds, has at the bottom of the slots 104 for the loose ends inserted support arms 102 ,

6 shows again the drive ring or drive ring 60 on which a number of support arms 62 by means of the sleeve counter bearing 106 are attached. The support arms 62 So serve to hold the drive ring 60 , Central is a receiving opening for the bearing sleeve mentioned elsewhere 100 intended. This is located from bottom to top directed a drive cross 107 (in 7 shown more clearly). The drive ring 60 has a variety of levels 112 , which are each formed by two adjacent teeth 118 , These stages 112 are progressively stepped from below with the help of the end of the drive shaft 67 attached transverse pin 66 , each one in one step 112 intervenes. The Ascheräumarme are in turn with 72 designated.

To 7 is about the (in 1 shown) entrance lock 6 Woodchip h in the fixed stovetop 10 brought in. In this is - seen from above - first the wedge-shaped Schamottring 22 , then the device 30 for air supply with a number of air nozzles 28 , which gives a uniform air distribution in the glow area 12 ensure, and below the Schamottring 26 , whose bottomed-in constricting ring 32 (also made of fireclay, smaller inner diameter) is enclosed on both sides of thin sheets. The Rings 22 . 26 . 32 as heat shields provide the necessary heat protection. Below the second sheet is the bell 42 attached. The adjustment tube 36 with eyelet 40 on the lid 38 is in the middle of the bell 42 , The lower part of the bell 42 is located in the upper part of the enclosure 54 , Inside the adjustment tube 36 lies the star 44 with his wings 46 , Underneath is the rust 50 , From the bottom edge of each wing 46 can go up to the rust 50 a distance of 2 to 3 mm may be present. The wood gas g comes from the outlet openings, the ends of the wings 46 lie in the room 20 between the herd use 10 and the boiler housing 18 , The same applies to the wood gas g, that through the elongated breakthroughs 56 in the wall of the mount 54 passes through.

In the lower part of the core tube 34 protrudes the drive cross 107 in, which is for turning the core tube 34 and to turn the wings 46 serves. This drive cross 107 is operated with respect to its rotational movement of the drive ring 60 , of the by means of the support arms 62 connected with him. As shown, the drive ring 60 by means of the on the drive shaft 67 End-mounted transverse bolt 66 incrementally in the selected direction of rotation.

In the lower area is centrally the Ascheräumer 70 with a variety of ash-clearing arms 72 arranged. So that the bearing tube 108 in whose interior is the drive cross 107 is located, can not move sideways, is on the ground 68 a round disc 120 welded. To this disc 120 is the bearing tube 108 with its lower end perpendicular to the bottom of the vessel 68 rotatable.

From the sectional perspective view according to 8th it follows that by sucking air l through the air nozzles 28 from the air distribution pipe 24 a uniform heating and thus avoiding supercooled places in the glowing area 12 is possible. The over the fixed grate 50 turning away sliding wings 46 Ensure sufficient drainage of sand and ash from the ember room 12 , so that a high efficiency in the implementation of wood chips h in wood gas g is guaranteed. The star 44 For example, it can rotate slowly at intervals. For example, he can walk slowly for a minute, then making a quarter turn; and then he can z. B. Rest for 20 to 30 minutes. The wings 46 Slowly grind on the grate during the rotation 50 while rubbing sand and ash a through the holes 49 of rust 50 ,

It should be noted that the core tube 34 can extend far down. It's down through a lid 122 closed. This lid 122 has a cross slot in which the drive cross 107 from the bearing tube 108 from intervenes. The drive ring 66 is externally by means of an electric motor (not shown) and the shaft 67 each further rotated by one step.

LIST OF REFERENCE NUMBERS

2

Wood gas boilers

4

central vertical axis

6

airtight entrance lock

8th

End cover

10

Kesselwand, Herddeatz

11

pyrolysis

12

Glutzone, embers bed

14

outer wall

16

Inlet for air l

17

Outlet for wood gas g

18

boiler house

20

free space

22

Upper Schamottring

24

Air manifold

26

lower chamotte ring

28

air nozzle

30

Device for air supply

32

Einschnur Ring

34

core tube

35

Cover of the core tube 34

36

adjustment cylinder

38

cover

40

eyelet

42

Bell jar

44

star

46

wing

47

Hole, slot

48

stripping

49

Hole of the ashtray 50

50

Rust, ashtray

52

headband

54

mount

54a

upper part of the mount 54

54b

area

56

perforation

60

drive ring

62

Beam

64

entry hole

66

Cross pin of the drive shaft 67

67

drive shaft

68

Kesselboden, bottom plate

70

Ascheräumer

72

clearing arm

74

cavity

76

Ash-through opening

78

ash tray

79

screw tube

80

carrying cross

82

Retaining element for ring 32

84

Wall, first ring

86

second ring

88

Retaining ring

90

inner stabilization ring

92

outer stabilization ring

94

rib

96

edge

98

takeaway

100

bearing sleeve

102

Beam

104

slot

105

retaining ring

106

Sleeve end support

107

drive Cruising

108

bearing tube

108a

Broadened lower end of the bearing tube (= support flange on the bottom of the vessel 68 )

109

drive axle

110

expansion element

112

step

114

disc

116

roof-shaped breakthrough

118

tooth

120

disc

122

cover

a

Ash, sand

G

wood gas

H

wood chips

l

air

Claims (25)

Wood gas boiler ( 2 ), - where within a boiler wall ( 10 ) and above a boiler bottom ( 68 ) means for supplying air ( 30 ), a bell ( 42 ) and under it a rust ( 50 ), - in which the on the grid ( 50 ) from wood chips (h) in an ember bed ( 12 ) produced wood gas (g) is sucked and can be discharged to the outside, and - in which the from the ember bed ( 12 ) ashes (a) after passing through the grate ( 50 ) from the bottom of the tank ( 68 ) is also dischargeable to the outside, characterized in that a) that in the area of the ember bed ( 12 ) about a central vertical axis ( 4 ) rotatable star ( 44 ) having a number of wings ( 46 ), which is star-shaped in the direction of the boiler wall ( 10 ), - which are designed as suction channels for the transmission of wood gas (g), - in their walls each have a number of holes ( 47 ) to the entry of the wood gas (g) from the ember bed ( 12 ), and - whose outer ends are designed to exit the wood gas (g), b) that the star ( 44 ) of an enclosure ( 54 ), the openings for receiving the outer ends of the wings ( 46 ), so that from the ends of the wings ( 46 ) exiting wood gas (g) from the area between the enclosure ( 54 ) and the boiler wall ( 10 ) is suctionable, and c) that the enclosure ( 54 ) preferably with the star ( 44 ) is mitdrehbar. Wood gas boiler ( 2 ) according to claim 1, characterized in that the undersides of at least some of the wings ( 46 ) each with a scraper edge ( 48 ) are designed for ash (a) and possibly sand. Wood gas boiler ( 2 ) according to claim 1 or 2, characterized in that the holes ( 47 ) in the wings ( 46 ) at least 2 cm above the grate ( 50 ) and thus during operation within the woodglass zone ( 12 ) are located. Wood gas boiler ( 2 ) according to one of claims 1 to 3, characterized in that the holes ( 47 ) are elongated. Wood gas boiler ( 2 ) according to one of claims 1 to 4, characterized in that the star ( 44 ) including edging ( 54 ) by means of a centrally arranged core tube ( 34 ) about a common vertical axis ( 4 ) is rotatable. Wood gas boiler ( 2 ) according to claim 5, characterized in that for driving the core tube ( 34 ) a drive ring ( 60 ), which is below the grate ( 50 ), an electric motor located outside the boiler wall ( 10 ), as well as from the electric motor through the boiler wall ( 10 ) in the boiler room ( 18 ) reaching drive shaft ( 67 ) are provided. Wood gas boiler ( 2 ) according to claim 6, characterized in that the motor optionally runs forward or backward. Wood gas boiler ( 2 ) according to one of claims 1 to 6, characterized in that the star ( 44 ) and the border ( 54 ) are rotatable at predetermined time intervals. Wood gas boiler ( 2 ) according to claim 8, characterized in that the star ( 44 ) and the border ( 54 ) are gradually rotated. Wood gas boiler ( 2 ) according to claim 8 or 9, characterized in that a drive is provided such that the star ( 44 ) and the border ( 54 ) rotate for about a minute, after which it is about a quarter turn, and then leave the star and the frame for about 20-30 minutes. Wood gas boiler ( 2 ) according to one of claims 1 to 10, characterized in that the wings ( 46 ) roof-shaped with two top roof surfaces are formed, wherein the two roof surfaces of the wing ( 46 ) each with the holes ( 47 ) to the entry of the wood gas (g) from the ember bed ( 12 ) are provided. Wood gas boiler ( 2 ) according to one of claims 1 to 11, characterized in that the enclosure ( 54 ) with a number of openings ( 56 ) for the passage of wood gas (g) from the wood embers ( 12 ) in such a way that the wood gas (g) enters the area between the enclosure ( 54 ) and the boiler wall ( 10 ) entry. Wood gas boiler ( 2 ) according to one of claims 1 to 12, characterized in that the boiler bottom ( 68 ) with an ash passage opening ( 76 ), under which a facility ( 78 . 79 ) for transporting the fallen ash (a) is arranged. Wood gas boiler ( 2 ) according to claim 13, characterized in that the device ( 78 . 79 ) for removing the ash (a) a screw conveyor ( 79 ). Wood gas boiler ( 2 ) according to one of claims 6 to 14, characterized in that below the Rust ( 50 ) a bearing tube ( 108 ) is rotatably mounted on the support arms ( 62 . 102 ) of the drive ring ( 60 ) are attached. Wood gas boiler ( 2 ) according to claim 5 to 15, characterized in that just above the boiler bottom ( 68 ) at the lower portion of the bearing tube ( 108 ) a co-rotating ash scraper ( 90 ) for clearing the fallen ash (a) in the direction of an ash passage opening ( 76 ) is attached. Wood gas boiler ( 2 ) according to claim 15 or 16, characterized in that at the bottom of the vessel ( 68 ) a round disc ( 120 ) is attached to the lower end of the bearing tube ( 108 ) perpendicular to the bottom of the vessel ( 68 ) is rotatable. Wood gas boiler ( 2 ) according to one of claims 1 to 17, characterized in that an adaptation cylinder ( 36 ) is provided, which is arranged to avoid a cold zone in the central area. Wood gas boiler ( 2 ) according to one of claims 5 to 18, characterized in that the adaptation cylinder ( 36 ) and over the core tube ( 34 ) is slipped. Wood gas boiler ( 2 ) according to one of claims 1 to 19, characterized in that the supply of air (l) in the Glutzone ( 12 ) with respect to the central axis ( 4 ) is substantially uniform. Wood gas boiler ( 2 ) according to claim 20, characterized in that the ember bed ( 12 ) is located in a glow chamber with a cylindrical wall, in which a number of air nozzles ( 28 ) is evenly distributed. Wood gas boiler ( 2 ) according to one of claims 1 to 21, characterized in that the flow of the air supply and the wood gas discharge with respect to the central axis ( 4 ) is substantially uniform. Wood gas boiler ( 2 ) according to one of claims 1 to 22, characterized in that for sucking off the wood gas (g) a suction device is provided which forwards the wood gas (g) to a combustion drive motor, which is preferably connected to an electric generator for the purpose of generating electrical energy is. Wood gas boiler ( 2 ) according to any one of claims 1 to 23, characterized in that it comprises at the top an inlet lock intended for the entry of wood chips (h) ( 6 ), which allows an airtight seal. Wood gas boiler ( 2 ) according to one of claims 1 to 24, characterized in that between the enclosure ( 54 ) of the star ( 44 ) and the herd use ( 10 ) a labyrinth seal ( 54a . 54b . 84 . 86 ) is provided.

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