FI103028B - Procedure for storing wooden material using snow, and snow cannon to be used for the procedure - Google Patents

Description

103028

METHOD FOR STORING WOODEN MATERIAL WITH SNOW AND A SNOW GUN USED IN THE METHOD

The invention relates to a method for storing wood material such as logs, sawn timber or wood chips by snow, in which a heap of material to be stored is covered with snow and an insulating layer, for example bark pulp or wood chips. The invention also relates to a snow cannon for cold storage of chips.

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In the forest industry, it is necessary to store round chopped wood and wood chips for many different reasons. Wood supply is abundant in winter due to favorable natural conditions for harvesting. because forest-owned farmers cut their forests in the winter.

Storage of bark-covered wood in open uncovered warehouses spreads insecticides on woods and wood-borne insect pests in the surrounding forests. 20 During the summer, the bark cover round wood in the open air stores dries, cracks, oxidizes due to wind and heat, and already at a few degrees of temperature has various fungal (including blue fungus) and microbial fiber destructive damage and various color defects in wood use. and cause wastage in processing and the need to use more chemicals and bleaches. In the storage of round wood, insecticides have been used to control insecticides and to prevent the spread of insects and to maintain the quality of the wood by continuous irrigation. Insecticides, on the other hand, become toxic residues of wood, which are not accepted in wood products: in products or in the effluents of wood processing. Watering * · slows down but does not prevent quality deterioration. Continuous irrigation brings new disadvantages and has a negative impact on the environment.

Round wood has also been stored immersed in water during the summer, but this form of storage does not prevent discolouration, fungal and microbial growth, although it improves quality, but the dew is not at all suitable for preserving some of the wood needed for processing. Chipped wood dries during summer time in open air warehouses and in airborne, high-volume wood chips, causing oxidation, darkening and gradual combustion of wood chips, resulting in loss and degradation of the fiber. In general, attempts are made to counter these drawbacks by arranging spray irrigation in the stock of chips, but irrigation does not prevent all damage and promotes the spread of spores of various fungal spores and mycelia and microbes to the chips to be stored, with immediate effects. Irrigation with chlorophenols (eg in the USA) produces adverse environmental effects.

In the past, some logs have been stored with snow. 15 This has happened with natural snow piled on top of the logs. However, such a procedure is not effective, the snow used has been rapidly melting despite the dielectric layer and the pile has been exposed and dried prematurely.

It is an object of the present invention to provide a more efficient and economical method of storing wood material with snow. Characteristic features of the method of the invention are set forth in claim 1. The features of a snow boiler used in cold storage of chips are set forth in claim 25. The method of the invention can be used generally for storing wood material fresh and, if necessary, over summer. The storage temperature can be reliably kept below + 4 ° C.

30 In addition to logs, the method can also be applied to fresh chips. sawn timber and dried veneers. By this method, the chips are kept fresh and self-composting and drying are prevented. The lumber produced in the winter season can be stored by this method 35 to wait for drying in the summer, which is 20 to 25% cheaper than in the winter. In addition, the fire risk of snow-stored timber is eliminated.

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Ecologically, logging is most profitable in the winter, so you don't have to go to the forest in the spring or summer. This avoids, among other things, root damage caused by machines, which results in fungal damage to the cultivated tree-5. The method avoids the use of insecticides and antifouling agents.

In the following, the invention will be described with reference to the accompanying drawings, which exemplify the use of the method in fresh cold storage of wood.

Figure 1 illustrates an arrangement for storing logs with cannon snow.

Fig. 2 is a cross-sectional view of the common stock of chips and logs

Figure 3 shows a custom-made snow cannon

A cold store for timber is set up in the winter, to the north of the natural barrier, ideally during the frost. In Figure 1, the letter S-20 illustrates the southward direction. The northern edge of cliff 4 forms a particularly advantageous natural barrier here, providing considerable protection from the sun's rays.

The external dimensions of a fresh quarry, set up in a rock quarry, are 25 60 m x 100 m and 10 m high. Wood can hold this storage • ♦ · 350000 k-m. The dimensions of Figures 1 and 2 have been modified.

The logs form a pile 5, but they are run over the crushed bed 6 and the snow base, which form the insulation below. 30 With the snow cannon 2, the artificial snow is partially packed between logs - but especially tightly on the sides and on top of the pile. The stack is stacked step by step to provide enough snow between the logs. Snow plowing, eg 50 cm layer, should be done at least 2 m layer thickness. With the help of snowmobiling and tia-35, polishing the snow on a heap allows lorries to be driven as the heap is assembled.

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Finally, an insulating layer 8, for example wood chips or bark, is blown over the snow layer 7. To blow the insulating mass, a custom-made snow cannon can be used, where the water supply is cut off and the chips are directed into the blowing stream.

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The foundation of the heap may include a drainage duct 9 to collect the melt water.

It is essential that a blend 10 is used as the feed water for the snow plow, which provides much more favorable snow for natural snow. Preferably, industrial crystallized process water, fibrous residues and / or peat humus are mixed with the crystallization water to promote snow crystallization. Industrial crystallizers may also be used, e.g. product sold under the trademark SNOMAX. The use of process water 15 may be associated with the purification of clarified wastewater contaminants while removing gaseous contaminants.

When storing wood in forests, humus-rich marsh water is used for the production of snow, where the humic substances are crystallization nuclei.

Artificial snow differs in its crystal structure from natural snow. Coarse-grained, tightly packed artificial snow melts slowly, which is crucial here. Snowfall is best done during the winter at temperatures below -5 ° C. Energy consumption will increase significantly as the temperature rises, although snow-plating as such is still possible at temperatures of +2 to +4 ° C.

In Figure 2, the chips are stored on top of the log stack 5. Naturally. thus, the chips can be stored entirely in their own heap. Here, chips 5 'is actually a mixture of artificial snow and chips. With a snow cannon 2 ', the chips are blown with snow, whereupon the snow crystallizes directly on the chips. There is no free air space around the chips, which prevents all of the above-mentioned harmful effects in the chips. The general store 5, 5 'is covered with snow layer 7 and insulation layer 8, here with chips. In the manufacture of large stockpiles of chips, it is sufficient to cover the stock 103028 5 with a chipping snow mixture 2-3 meters thick. Even when the snow is thawed, the temperature and humidity of the surface chips remain at such values that there is hardly any damage during storage.

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The snow cannon of the invention is schematically shown in Figure 3. The snow cannon 2 'includes a fan and nozzle portion 13, a pump, an air compressor, a nozzle device for spraying a water mixture, and a blower funnel 15. The snow cannon has conventional water and electrical connections 16 and 17.

A chips feed tube 14 is connected to the hopper 15, whereby the chips are dropped into the snow stream. The device can also be used to blow chips alone if the water supply is cut off.

The wood material stored by the method herein is removed from storage when it is needed for industrial use. If necessary, over-year storage is possible.

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The pile may be placed, at least in part, in a basin or pit, for example a rock quarry. The method of storing the logs, at least in part, in a basin where an ice cap is formed and on which the above-mentioned snow-stocked pile is formed, can also be applied.

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Claims (10)

A method for fitting attagra trämaterial säsom Timmer, flaunting a sentence eller flis med hjälp av snö, i sketching a method materialhöget (5, 5 ') som scall lagras tarcks med snö (7) och med ett isolerings-lager (8), t. ex. barkmas eller flis, kännetecknad av att snön packas med en snökanon full bland högel (5, 5 '), pa sidorna och 25 ovanför, varmed trämaterialets reagerande med luften hindras effektivt. A method for storing wood material such as logs, sawn timber or wood chips by snow, wherein the heap (5, 5 ') of material to be stored is covered with snow (7) and an insulating layer (8), for example bark pulp or wood chips, characterized in the snow cannon tightly to the heap (5, 5 '), to the sides and on top, effectively preventing the wood material from reacting with the air. 10 2. The method enligt patentkrav 1, the tongue-in-cheek trämaterial-höget som skall lagras placeras i skydd frän solens straining 30 paordordan av face hinder, t.ex. en as (4). Method according to Claim 1, characterized in that the pile of wood material to be stored is placed in a shelter from the sun's radiation to the north of an obstacle, for example a rock ridge (4). 15 The method enligt patent krav 1 eller 2, the turnbuckles av att that the isoleringslager (6), i.e. ex. av krossten, placeras under höget. Method according to claim 1 or 2, characterized in that an insulating layer (6), e.g. 4. A method according to claim 1, 2 eller 3, a turn-off of a placenta under the mouth. 103028 Method according to claim 1, 2 or 3, characterized in that a layer of snow is placed under the pile. 5. The method enligt face av patent kraven 1-4, the translucent path att höget (5) placeras ätminstone till en del i en bassäng eller i en grop, t.ex. i et stenbrott. Method according to one of Claims 1 to 4, characterized in that the pile (5) is placed at least 25 in a basin or pit, for example in a rock quarry. 6. A method enligt patentkrav 5 för att lagra Timmer, tännetecknad av att trästockarna lagras ätminstone delvis i en bassäng, i wanna go to et islock picture and wanna go to man formar det ovann. Method for storing logs according to claim 5, characterized in that the logs are stored, at least in part, in a basin where an ice cap is allowed to form and on which the aforementioned heap is formed. 6 103028 The method of applying the patent patent craven 1-5, the method of applying a crystal crystallization salt of a bleaching industrins sedimenterat processvatten, a fiberrester and an eller humus. Method according to one of the preceding claims 1 to 5, characterized in that the crystallized water of the snow gun is blended with crystallized process water, fibrous residues and / or peat humus as crystallization cores. 103028 8. A method of applying a patent patent craven 1 - 7 i färskkalllagring av flis, a tongue decnad av att flisen bläses i högel (5 ') som skall lagras tillsammans med snön. Method for fresh cold storage of wood chips according to one of claims 1 to 7, characterized in that the wood chips are blown in a heap (5 ') to be stored together with snow. 5 9. The method enligt patentkrav 8, the rotation catheter 20 (5 ') placeras timmerhöget (5) som samförräd. Method according to Claim 8, characterized in that the chip pile (5 ') is placed on top of the log pile (5) for general storage. A snow cannon (2 ') for carrying out the method according to claim 8, comprising a pump, an air compressor, a blowing device (13), a nozzle device for spraying a water mixture and a blowing hopper (15), characterized in that the blowing hopper (15) a feed tube (14) for mixing the chips 15 directly into the blown snow stream. 10. A snake canon (2 ') with a net method according to the invention patent patent No.avav 8, a crawler canon innehäller en pump, a luftcompressor, a blå-sanordning (13), a munstycken för att spruta vattenblandningen 25 and a blåstratt (15). 15) innehäller et matningsrör (14) för flisen, save att flisen kan blandas dig in i snöströmmen som utbläses. 30