DE3020874A1 - Burner for comminuted wood - consists of tube closed at upstream end, housing tubular charging device above staggered grates fed with air through end plate - Google Patents

Abstract

The burner for wood-fired plant is fed with comminuted wood via a charging aperture. It comprises a tube which is substantially horizontal in the working position, with a front closing-plate pierced near the top by a tubular charging device and lower down by air holes. The device extends only part-way along the burner tube and is surrounded by a stub-tube, mounted on the closing-plate, and projecting beyond it. Below this tube there is at least one cylindrically-dished tray in turn projecting beyond the tube. Both tube and tray have air holes near the bottom at the downstream end.

Description

Mr. Herbert Nolting, Leopold-Zunz-Weg 1 A, 4930 Detmold

Burners for a wood-burning system

The present invention relates to a burner for a wood-burning system, which is provided by a feed opening shredded wood can be fed.

The present invention is based on the object of creating a burner of the generic type which with a simple and thus failure-prone construction ensures that the wood is burned as completely as possible.

The solution to this problem is, according to the invention, that the burner consists of one in the position of use consists approximately horizontally lying pipe, which is on the feed side through one up to the feed opening as well as a large number of air passage holes

closed front wall is closed and its front wall has passed through in the upper area by a feed pipe which only partially protrudes into the interior of the pipe and is encased by a pipe socket attached to the end wall which extends over the front end of the feed pipe protrudes into the inside of the pipe and below this at least one more attached to the end wall of the pipe, segment-like partial shell is arranged, which compared to the pipe socket even further into the pipe interior is guided, with both the pipe socket and the partial shell in the lower circumferential area in the front end area Air supply openings are provided.

The chopped wood fed to the burner falls from the feed pipe onto the front one with air supply openings provided end of the pipe socket, from there to the front end area of the sub-shell below, which is also provided with air supply openings and, if necessary, on further partial shells protruding step-like into the pipe interior, whereby a faultless and complete combustion with even and calm flame formation is guaranteed. The structure of the The basic concept of Brenners is very simple and not prone to failure, as there are practically no moving parts are required inside the burner. Through the pipe socket and the arranged below the pipe socket Partial shells are, so to speak, formed different firing stages, with each of the firing stages the required Primary air is supplied from below. The required secondary air is drawn through the upper edge of the Tube fed.

Advantageous refinements of the invention are the subject of subclaims.

An exemplary embodiment of the invention is shown in the two

Fig. 2 Fig. 3 Fig. 4th Fig. 5 Fig. 6th Fig. 7th

- 6 - Nolting

attached drawings and is described in more detail below.
Show it:

Fig. 1 is a vertical section through a burner according to the present invention,

a section along the line II - II in Fig. 1,

a view in the direction of arrow III in Fig. 1,

a section along the line IV - IV in Fig. 1,

a section along the line V - V in Fig. 1,

a section along the line VI - VI in Fig. 1,

a section along the line VII - VII in Fig. 1,

8 shows a section along the line VIII - VIII in FIG.

The burner shown in FIGS. 1 to 8 consists essentially of an approximately horizontal in the position of use lying pipe 1 with an end wall 2 and a feed pipe 3 passing through the end wall 2, a feed pipe 3 enveloping pipe socket 4 and several partial shells 5 and 6, which are arranged below the pipe socket 4 are.

The pipe 1 is provided with a screw-on flange 7, by means of which the entire burner can be attached to a boiler, not shown in the drawings is.

The feed pipe 3 is used to feed chopped wood to the burner. For this purpose it is provided within of the feed pipe 3 to arrange a screw conveyor 8, by means of which, depending on the speed, the burner per unit of time more or less shredded wood can be fed.

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As can be seen very clearly from FIG. 3, the end wall is 2, by means of which the tube 1 is closed on the supply side, with a plurality of air passage bores 9, through which the air required for the combustion of the supplied wood in can reach the burner.

As FIGS. 1 and 2 show very clearly, the feed pipe 3 protrudes only partially into the interior of the pipe 1 into it. The feed pipe 3 is also guided into the upper region of the pipe 1 in the same. The pipe socket 4, which envelops the feed pipe 3, has a larger diameter than the feed pipe 3 and is opposite the feed pipe 3 arranged eccentrically and also protrudes further into the interior of the pipe 1 than the said pipe socket 3. The comminuted wood conveyed through the feed pipe 3 by means of the screw conveyor 8 into the burner so falls first on the front, lower end of the pipe socket 4. The pipe socket 4 is in this area equipped with air supply openings 10, which are arranged below a retaining plate 11, which retaining plate 11, seen towards the open side of the pipe socket 4, rising in the lower region of the pipe socket is arranged.

The sub-shell 5 lying below the pipe socket 4, which is concentric to the pipe socket 4, but at a distance from it this extending from the end wall 2 into the interior of the tube 1, protrudes even further into the interior of the tube into it than the pipe socket 4. Said partial shell 5 is also at its front end in the region of its front end The underside is equipped with air supply openings 10, which in turn are provided below a retaining plate 11 are, which retaining plate 11 as well as the retaining plate 11 of the pipe socket 4 to the free end of the partial shell 5 is arranged in ascending order.

430050/023}

The same applies to the further partial shell 6, which has an even larger diameter than that above it lying partial shell 5 and practically up to the free and open end of the tube 1, from the end wall 2 starting, runs. The partial shell 6 is again with the already mentioned air supply openings 10 below an ascending retaining plate 11 is provided.

Extends beyond the free end of the tube 1 is a pivotable about a hinge axis 12 flap 13, which is also with a retaining plate 11 and below the same provided air supply openings 10 is provided.

Due to the different far into the interior of the tube protruding front ends of the pipe socket 4 and the Part shells 5 and 6, which are also offset from one another in terms of height, are different within the burner Burning stages formed, which lead to a practically complete combustion of the supplied, crushed Lead wood. In the area of the pipe socket 4, the so-called gasification takes place, i.e. that chopped up wood is brought to a temperature of approx. 90 and above. In the course of the further firing stages, a continuous, complete combustion takes place with even and calm flame development.

The primary air required for the combustion is supplied to the individual combustion points through the air supply openings 10, which have already been mentioned several times. The secondary air required for the combustion is supplied through the upper region of the pipe 1 and is heated in the process. For better air guide for the secondary air of the tube 1 are arranged guide plates 14 in the front end.

130QS0 / 0233

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As FIGS. 4 and 5 show very clearly, the partial shells 5 and 6 are connected to one another by side walls 15 and 16 except on the end wall 2, the side walls 15 and 16 being brought up to the jacket of the pipe socket 4 and on the other hand the inside of the pipe 1 so that air ducts are formed between the pipe socket 4 'and the next sub-shell 5 and the further sub-shell 6 underneath and the lower region of the pipe 1, through which the primary air is guided to the individual burners.

130050/10233

Nolting

List of reference symbols

1 pipe 2 Front wall 3 Feed tube 4th Pipe socket 5 Partial shell 6th Partial shell 7th Ans ehraubf1ans ch 8th Auger 9 Air passage holes 10 Air intakes 11 Retaining plate 12th joint 13th flap 14th Baffles 15th Sidewall 16 Sidewall

13 DOS © / 0233

Claims (8)

3Q2Q874 Nolting PafenlanwSlle Dr. O. Loesenbeck Dipl.-Ing. Strake Dipl.-Ing. Loesenbeck 48 Bielefeld, Herforder Strafje IT Claims Ij burner for a wood-burning system to which chopped wood can be fed through a feed opening, characterized in that the burner consists of a pipe (1) which is approximately horizontal in the position of use and which on the feed side passes through one up to the feed opening and a large number of air passage bores (9) closed end wall (2) is closed and the end wall (2) of which is penetrated in the upper area by a feed pipe (3) which only partially protrudes into the interior of the pipe and is encased by a pipe socket (4) attached to the end wall (2) , which protrudes beyond the front end of the feed pipe (3) into the pipe interior and below which at least one segment-like partial shell (5) attached to the end wall (2) of the pipe (1) is arranged, which opposite the pipe socket (4) still is guided further into the interior of the pipe, in the front end area of both the pipe socket (4) and the partial shell (5) in the lower circumferential area Luftzufuhröff openings (10) are provided. 2. Burner according to claim 1, characterized in that below the partial shell (5) a further partial shell (6) is arranged, which over the front end of the part 1300S0 / O233 ORIGINAL INSPECTED - 2 - Nolting shell (5) also extends to approximately the free end of the tube (1). 3. Burner according to claim 1 or 2, characterized in that in the beyond the free end of the tube (1) going A flap (13) pivotable about a hinge (12) is arranged, which, like the pipe socket (4) and the partial shells (5 and 6) in its front, lower end area with air supply openings (10) is provided. 4. Burner according to one of the preceding claims, characterized in that the air supply openings (10) are each arranged below retaining plates (11) and that the retaining plates (11), in the direction of passage of the wood to be burned are arranged in ascending order. 5. Burner according to one of the preceding claims, characterized in that the partial shells (5 and 6) laterally are connected to one another by side walls (15 and 16), which side walls (15 and 16) on the one hand are attached to the pipe socket (4) and on the other hand to the pipe (1), so that between the pipe socket (4) and the adjacent partial shell (5) and between the two partial shells (5 and 6) and beyond that between the partial shell (6) and the lower region of the tube (1) channels for air supply are formed. 6. Burner according to one of the preceding claims, characterized in that the tube (1) with a screw-on flange (7) is provided. 7. Burner according to one of the preceding claims, characterized in that in the front, upper end region of the tube (1) baffles (14) are arranged. . 13UÖS0 / 0233 COPf _ 3 - NoIting 8. Burner according to one of the preceding claims, characterized in that the pipe socket (4) which envelops the feed pipe (3) is arranged eccentrically with respect to the feed pipe (3). - ^: - -.- · 130050/0233