DE1927806A1 - Plant for storing chips, in particular wood chips - Google Patents

Description

dr.w. Schalk dipl-ing. ρ, Wirth DIPL.-ING.G. Dannenberg DR. V. SCHMIED-KOWARZIK · DR. P.WEINHOLD _ft «, ~«,

6 FRANKFURT AM MAIN

CR. ESCHENHEIMER STR. 39

Da / mk oasis 1166

May 30, 1969

Mo och Doms jö Aktiebolag Örnsköldsvik, Sweden

Plant for storing chips, in particular wood chips

The invention relates to the storage of cossettes in heaps, and in particular such heaps, of which essentially equal amounts of schnitzel are fed and discharged on opposite sides of the pile.

In factories for the production of cellulose, wood fiber and chipboard as well as in sawmills, the wood can be in the form of Pile of schnitzel to be stored. This type of storage is made from for various reasons in such and similar establishments. For example, the chips can be stored in a sulphate mill be used as a rational and cost-saving method for handling or storing the wood to be used, while in a sulphide mill the chip storage processes can be used to improve the quality of the raw wood.

The temperatures encountered in piles of schnitzel are normal significantly higher than the temperature of the environment due to the chemical and biological processes that take place in the Heaps take place. Temperatures in the range of 30 ° -60 ° G are common, although higher temperatures also occur. The enzymatic

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Hydrolysis of the extractive substances of the wood-it takes place in the warm and humid atmosphere of a chip pile takes place more quickly than in the normal storage of round wood, and it becomes at the same time the extractive substances through the oxygen in the air oxidized. Through these processes the extractive substances of the wood can be stored in the short time of the chips Pile are changed so that the substances during the sulfide pulp process can be easily freed and result in a pulp with a low extract content, so longer storage times are on the other hand required for oohwood in order to achieve the same low extract content with conventional storage methods for roundwood reach.

In previously known methods for building piles of chips the chips will be grounded in the place where the pile is built is said to be pneumatically fed through a pipe and the material dispensed into the heap is then balanced, usually with help of a tractor. However, there are several serious disadvantages associated with these methods the tractor in the pile advantageous compactness with that the chips are stacked through a pipe when conveyed pneumatically were greatly disturbed. This disturbance allows more air to enter the heaps with local waste the temperature in it. In winter, these temperature drops can reach such an extent that the enzymatic decomposition process temporarily practically stops in particularly cool areas. As a result, at the end of the storage period, the Pile of removed schnitzel of very different quality. If such chips are then, for example, in a company processed for the manufacture of pulp or wood panels, there is a substantial change to the previously established Process conditions across the entire production line. The schnitzels lead to insufficient decomposition of the cellulose great difficulties in terms of resin deposits the wire and in lines. On the other hand, if the duration of the

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The decomposition process in the cool areas of the pile is prolonged, by having longer. Storage time of the entire stack "or heap is worked, the result is a" significant loss on wood, as the decomposition process continues for too long in the non-cooled areas of the pile. Other disadvantages "when using. tractors to level the pile lie in the acquisition and operating costs of the tractors and the high costs for the tractor operator, as well as the difficulty the supply of "for example warm air or steam for Heizen'des heap in a simple manner without the lines so embarrassed that they are facing a serious obstacle to the tractor leveling the pile. It continues with the one mentioned A method with a significant disadvantage that every time the length of the supply pipe has to be changed as the pile grows, a support of the pipe with the help of the previously erected cossette pile is required. In the case of assembled pipes, which are often heavy, this costs considerable time and also becomes, the previously built heap, which for a while to support of the delivery pipe has to serve, often caused by the weight of the pipe to break in. Because the direction in which the conveyor pipe the Schnitzel gives off, is strongly dependent on the strength and direction of the wind, the position of the pipe must often be new aligned to give the pile the shape you want. In this regard it is again disadvantageous that the setting the position of the pipe must often be above the pile and the ground level, which is time consuming and costly.

It is already known to add the same amount of chips to the heap as is removed from the heap in order to achieve a uniform amount To achieve storage time and simplified delivery of chips to the pile. A particularly useful arrangement for this is provided with a centrally arranged, vertically and laterally adjustable tube, by means of its chips along a essentially circular path that "passes through a segment of a circle is interrupted, are stackable, whereby'die Schnitzel over the

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entire trapezoidal cross-section of the annular cluster., removable and to a delivery station in its. Center forwardable are. Simultaneously with the stacking of the chips along the Hinges and the continuous movement of the feed station along the slope, a corresponding amount of schnitzel is removed, and the discharge station is continuously moved a corresponding distance in the same direction. To this Wisely, all of the schnitzel in the pile lingers for an equal amount of time. However, it has been found that the Piling up the chips in very large piles, for example with a diameter of more than 200 m, the known arrangements certain Difficulties arise, such as high costs of the system, a high degree of sensitivity of the required ear connections and an unnecessarily large distance from the center of the pile of chips.

Around the machinery at the foot of the feed pipe against the heap To protect falling chips, it has proven to be necessary in both types of systems to keep the pile at a certain distance of the machinery to arrange. The disadvantage here is that the conveying paths for the schnitzel both to and from Piles are unnecessarily long, which is extraordinary in terms of large amounts of cossette into consideration results in a considerable increase in storage costs and also a Increase in the cost of each individual pile of chips required flat and smooth G-round surface with it.

The invention avoids these disadvantages and relates to a system for storing wood chips in a pile along an im essential circular path, in the middle of which there is a tower is located, the upper part of which stores a rotatable about the tower pneumatic conveying device for the chips, with means for the Supply of the chips to the conveyor is provided, and the chips can be deposited in the form of a ring around a tower,

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and wherein the tower in terms of height and shape as a barrier between opposite parts of the chip pile is formed.

Since, according to a preferred embodiment, the system according to the Invention has devices for distributing and leveling the chips, this requires Icein tractor. Through this The aforementioned disadvantages associated with the use of a tractor are also eliminated.

Since the feeder, as will be described in more detail below, preferably comprises a plurality of tubes for pneumatically feeding cossettes to the pile, the difficult and costly labor of adjusting the feed tubes can also be dispensed with. Another essential advantage of the invention is that the chips can be stored much closer to the center of the ring-shaped pile than was the case with previous systems of the jail. This advantage can be achieved because the chip feed devices and the associated machinery can be accommodated above or within the pile - in the tower located in its center. In this way, the pile can be built adjacent to the walls of the tower practically up to the approach of the roof without coming into contact with the feed devices and the associated machinery. On the other hand, the conveyance for the chips between the pile and its ivlittelpunkt o is reduced by up to 20 ° /. The chips are therefore conveyed more quickly and at the same time the energy required to convey a certain amount of chips is considerably reduced. As an additional advantage, the range of the funds is shortened compared to previously known designs, and thus their production costs are reduced.

The invention is described in more detail below in an exemplary embodiment with reference to the drawings, specifically showing

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Pig. 1 is a full perspective view of a partial Raised tower with a swiveling boom on which a pipe for conveying cossettes arranged in a pile, and means for supplying chips to the tube and means for removing chips from the pile;

Pig. 2 shows an enlarged view of a wheel frame supporting the boom of Pig. 1; and

Pig. 3 enlarged and partially broken open a counterweight for the boom and the feed pipes mounted on the latter .

JPig.1 shows a tower made of concrete, for example, in the shape of a cylindrical container placed upside down on the floor. In addition to the container walls, the upper part 2 of the tower, which corresponds to the bottom of the container and has the shape of a circular platform , supported by a number of pillars 3, which are attached between the ground and the underside of the platform. In the embodiment shown, the tower has a height of 12.5 m and a diameter of 31 m. On the platform 2 is a Rail 4 attached, which extends in a closed circular path around the "periphery of the platform. Provided on the platform is a slide 5 of lattice construction, which extends in the form of a segment of a circle of approximately 30 degrees from the center of the platform to the rail 4. At its end corresponding to the segment tip, the slide is mounted in a spherical, ring-shaped slide bearing 6 in the center of the platform. On the side of the slide assigned to the platform of the platform, the slide carries two wheel frames 7 (Pig.2), and this part of the slide is referred to below as the slide side. Each wheel frame 7 is carried by two wheels 8, which are arranged one behind the other a ± na for rolling on the rail 4 _f when de ^ joalitten rotates around its bearing 6. Each wheel is driven by a separate electric motor 9 via a (not shown)

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Gears driven. ! Of course, the number of frames is and the contention envisaged is not limited to two, but rather can be selected as required for good stability and suitable wheel pressure. Also, not each of the struggles needs 8 through one separate motor can be driven, but it can be assigned to the same motor, for example, both rags of a G-frame be, ϊ / egen the relatively small haders, the high had or Axial pressure and the short radius of curvature of the rail 4 was ■■ However, it was found appropriate to use separate drive motors to use.

The carriage has "crapezoidal cross-section in a vertical section through the slide side and the point where the slide is hinged. About tensions and stresses on the bearing reduce and increase the stability of the carriage and the boom, is preferably made of concrete Column 10 attached as counterweight to the part of the slide, which corresponds to the top of the segment. The column 10 is supported by a cylindrical element 11 which is fixed to the carriage attached and in turn rotatable in bearing 6 on the roof of the

is,
Tower stored / In the exemplary embodiment, the weight of the concrete column is around 80 tons.

The cantilever arm in lattice construction for supporting pneumatic conveying pipes is rigidly attached to the slide and extends from the top of the slide side obliquely upwards and radially outwards from the slide and the tower over a distance of about 60 m. The boom forms an angle with the horizontal of about 20 degrees and is supported in this position by a number of wires 14 which are fastened between an upwardly directed support 15 fixed to the upper edge of the slide side and the boom 13 (Fig.l). Two wires 14 are also attached between the support 15 and the slide in the vicinity of the bearing 6. All wires are through (not

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shown) clamping devices kept under tension. It is also possible the boom can be swiveled on the upper edge of the slide side to be attached to enable its raising and lowering into a desired position when building the pile of chips. on This allows the pulp to be ejected from the conveyor tube precisely controlled, for example in difficult wind conditions. "-_—

Bine! Pipeline 16 is for the pneumatic supply of the chips between the tower and an adjacent woodcut

™ cell device 17 is provided. The pipeline 16 extends below the floor surface to the tower, then bends up to the center of the platform and reaches into a rotatable coupling 16a within the Pillar 10. There is a pipe bend 16b attached to the rotary coupling ^ · closed and freely rotatable horizontally. The elbow 16b extends from the rotary joint and the tower along the top of the carriage 13 (Figo) to one on this attached branch or manifold 18 to which it is pivotally connected so that the manifold 18 is maintained the sealing connection with the pipe elbow is pivotable in a horizontal plane. The other end of the manifold. 18 carries a spring-loaded sleeve, and this end

) Adjacent are five tubes 20-24 parallel to each other and with their openings arranged on an arc, the radius of which has its center at the pivot point of the manifold. The tubes 20 24 extend along the boom with discharge openings at different distances from the tower, differing by about 12 m, with the longest pipe reaching the end of the boom. Of course, "the number of tubes / is limited to five, but rather any suitable number can be used. The number of pipes expediently depends on the size of the building to be built Schnitzelhaufen. In the exemplary embodiment, all tubes 20 have 24 an inner diameter of 450 mm. The four shorter pipes 20 - '23 aind each with pipe bends 20a 23a at their outer ends provided, the ends of which are at an angle of about 30 degrees with the Form the longitudinal direction of the tubes. These elbows 20a-23a are

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pivotally mounted at the ends of the tubes and can be in different Positions are blocked. The longest pipe 24 does not have a pipe bend at the end, but is completely straight. At the free end of the pipe bend assigned to the shortest pipe, a guide device is provided, by means of which the jet of the emerging schnitzel is precisely controllable.

The distributor pipe 18 can optionally be connected to each of the pipes 20-24. For this purpose, the sleeve 18 is pulled against the leather load from the pipe, whereupon the distributor pipe is rotated around its connection to the pipe bend 16b so that the sleeve 19 is directed towards the opening of that pipe, to which the manifold is to be connected. The sleeve is then under 'spring pressure in connection with the pipe in question brought. The spring force ensures a reliable seal between the distributor pipe and the connected one Pipe.

The system works to create a ring-shaped pile of cossettes as follows. The subject of the connection of the distributor pipe 18 to one of the pipes 20-24 is that in the shredding device 17 produced chips are fed to the pipeline 16 and pass from this via the pipe elbow 16b and the distributor pipe 18 to the tube connected to this from the group of tubes 20 '- 24 from which the chips are then ejected. For the supply of the chips to the pipeline 16, the usual ones are used Cyclones and dispensing valves of the type used in pneumatic shuttle feeders. As the pipeline 16 optionally connectable to one of the tubes 20-24 and the carriage 5 around the center of the platform 2 in the horizontal direction can be rotated to any position, the chips can be placed anywhere within the connected tube an area that is only passed through the walls of the tower 1 and the range of the longest of the pipes 20 -

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'• 7'24 is limited. v / hen a first heap of chips thus constructed has reached a desired size, a new heap is built at a certain distance from the first heap by switching to the next heap. After a number of small piles have been formed in this way in a radial direction from the tower using all or some of the tubes 20-24, the tube and the boom are rotated through a certain angle with the aid of the slide 5, whereupon a new row of small heaps is created in in the same way at some distance from the first row. This sequence is repeated until the final pile of cossettes essentially or approximately surrounds the tower, whereupon cossettes can then be deposited on top of the part of the pile that was built first. The working sequence is then carried out continuously in such a way that at the same time a certain amount of chips is added to the heap and a certain amount (often the same amount as is added to the heap) is removed from the heap, since the storage period has ended. The pulp, which has finished its prescribed storage time, is discharged via two identical devices. These devices, which are provided on opposite sides of the tower, convey the cossettes from the heap horizontally to a conveyor belt 25, which runs through the center of the tower, and the one or more receiving stations outside the tower and the heap for further processing of the cossettes can deliver. Each of these devices has a so-called double grid 26, as well as a screw conveyor 21 provided with two oppositely wound screws and two conventional screw conveyors 28 and 28 arranged one behind the other. Each host is located at ground level and extends from beyond and below the heap through an opening in the wall of the tower and radially into the tower to a screw conveyor 27 located therein. The screw conveyor 27 is located slightly lower than the host and extends transversely in the conveying direction with its ends protruding slightly beyond this. The conveyor 28a lies with its input end between the two screws of the conveyor 27 and slightly lower than this, while the conveyor 28b from the conveyor 28a up to

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the conveyor belt 25 is enough.

Y / enn Schnitzel τοη the pile of schnitzel built around the tower are discharged, the chips are transported to the closest of the two conveyor grids or grids 26 by means of tractors or the like, which are on the crockery heap. The chips or chips on the grate are then grounded through this to the conveyors 27, 28a and 28b and further onto the conveyor belt 25 given, τοη which they are trusted from the area of the tower to the receiving station or the receiving stations. When the breakdown of the schnitzel from the pile over a certain Period of time carried out and the removal parts during this When time has gradually shifted to the opposite side of the pile, the tractor moves to dispense the schnitzel the discharge device in the vicinity of the new extraction point, if the distance between the discharge device and the extraction point is suitable for this.

within the scope of the basic concept of the invention are a number of Modifications possible. For example, the "support pillars 15 on the slide and as a counterweight for the boom serving concrete column 10 'by an extension of the carriage 5 and an attached counterweight to be replaced. These Extension can extend from the slide in the middle of the tower to the opposite side of the tower and there in the previously described manner are generally supported above the carriage on the rail 4 by two two-wheeled wheel racks. the Wheels of the wheel racks can also be provided with separate drive motors. The counterweight is as far as possible from the Center of the tower attached away, and it can, as before, off Made of concrete.

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It is of course also possible to arrange the wood shredding or chipping device within the [Ourrns and thus the To shorten the conveying path of the chips or chips up to the pile. In this case, the wood shredding device is useful placed under the ground so that the facility can be supplied via an underground pipe. Such a line is then an obstacle to the work of the Tractor when transporting the cossettes to the conveyor grates.

It is also not necessary that a number of two facilities is provided, but it may be advantageous in certain cases to use only one challenge test or in In other cases, four conveyor grids are to be provided, namely one for each quadrant. The number to be selected depends primarily on the desired discharge capacity and the diameter of the tower, as well as the ring-shaped pile of chips. Even do not need any electric motors provided for the carriage 5 Instead, hydraulic, pneumatic or mechanical ones are just as suitable.

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Claims (1)

Dr. W. ScBaIk, Dipl.-Ing. P. Wirth 192 7808 Dipl. «Lng. G Dainenberg Da / mk _{Dr v} $,: ~ j ^;! _C i-Kowarzik ¹ ^ o ocil Doms j ö AB May 30, 1969 Dr P. W-, ^J. i, Or, D. Gudel Q _ase 1166 Claims 1. System for the pile-shaped storage of chips along a essentially circular base, in the center a tower is arranged, the upper part of which supports a pneumatic chip feeder rotatably around the tower, wherein Means for supplying the feed device with chips and for distributing the chips in a concentric ring around the Tower are provided, characterized in that the height and the design of the tower (1) a barrier between opposite Dividing the Schnitzelhaufen forms. 2. Plant according to claim 1, characterized in that the Schnitzel supply device is provided with various discharge devices (20-24), each of which is a specific one Section of the radial extent of the cossette pile is assigned .. 3. Plant according to claim 1 or 2, characterized in that the delivery devices (20-24) on the roof (2) of the tower are arranged to be movable over a circular path (4). Plant according to one of the preceding claims, characterized in that that at least 2, the schnitzel pneumatically pipes (20-24) of different lengths which emit to the heap are provided, which extend from a point (19), at which the chips can optionally be fed to the tubes, and those at a horizontally pivotable boom (13) with this are mounted movably together. 009826/14 10 192780S "5 · Plant according to claim 4, characterized in that the Point (19) at which the chips can be fed to the tubes (20-24) is attached to the boom (13). 6. Plant according to one of claims 4-6, characterized in that the boom (.13) on a horizontally pivotable, with wheels (8) provided carriage (5) "is attached over that the boom can be pivoted. 7. Plant according to claim 6, characterized in that each of the wheels (8) is a pneumatic, hydraulic, electric or mechanical motor (9) is assigned, via which the ■ slide (5) arranged along a on the roof of the tower (l) Circular path (4) can be driven. 8. Plant according to claim 7, characterized in that the circular path arranged on the roof of the tower is one of the wheels (8) " of the carriage (5) receiving rail (4) on the roof of the tower (1), and that an annular, spherical slide bearing 6. is intended for the sled on the tower in the middle of the roof. 9. Plant according to one of claims 6-8, characterized in that the carriage (15) with a counterweight (10) for the boom (13) on the furthest from the boom Is provided. 10. Plant according to one of claims 6-9 »characterized in that that the carriage (15) is directed upwards with e ^ no Post (15) is provided, from which wires (14) to the To the boom (13) and to the rope of the slide, which runs from the 009826/1410 casually farthest away, extend to reinforce the boom. Patent attorney 009826 / U 1 0