FI56853C - FOERFARANDE FOER PRUDUKTION AV TORV - Google Patents

Description

! ΓΒΐ «« ANNOUNCEMENT ccflr0 jSBTa '11' UTLÄGGnIngsskrift 56853 ♦ C (45) Patent granted 10 04 1930 V Patent meddelat (51) K ».lk. * / Int.ci. * 0 10 P 3/00 FINLAND —FINLAND (M ) * t * nttlh »k * mu * -l ** nttn * öknlng 7T07U8 (22) Hakemltpllvl - Ansöknlngidaf 09.03.77 (23) Alkupllvi— Glltighetsdag γγ (41) Has become public— Blivlt offentllg __„ o

Patent, and Registry Board N «httv» k ».p» non j. KuuljulksUun pvm._ „Patent · och registarstyralaan '' Ansökan utlagd och uti.skrKtan pubUcarad 31.12.79 (32) (33) (31) Requested prefix * —Begird prloritat - (71) (72) Simo Oskari Tilkanen, Karinainen, 21800 Kyrö, Suomi-Finland (FI) (7 ^) Oy Jalo Ant-Wuorinen Ab (5 * 0 Peat production method - Förfarande för Produktion av Torv

The invention relates to a new method for raising peat when the bog is frozen. The method achieves considerable advantages over the previous ones.

__ Until now, peat has been lifted by hand with a so-called yard and special peat lifting machines during the summer. These methods cannot be used in winter when the bog is frozen. The lifting season has been short, 3-4 months, in wet summers even shorter. The large manpower required by the known methods and the above-mentioned short production period make the lifting of peat fires unprofitable at present costs. In addition, the disadvantage of mechanical lifting in Finland is the unevenness of our bells and often their small size.

An attempt has been made to extend the short lifting period in accordance with Swedish Patent 24,896 by taking advantage of the changes in the cell structure of the peat caused by the freezing of the peat. In this case, the procedure is to raise the peat during the summer season on the surface of the bog or on some other suitable platform, where the peat is left to freeze for the winter season. The frozen peat is allowed to thaw in the spring, which means that the water from the melted peat is much easier to remove than that raised directly from the bog. This is explained by E 21 C 1 + 9/00 2 56853 due to the fact that the cellular structure of the peat breaks when it freezes, allowing water to drain more freely from the broken pores. When operating according to this method, the weather of the lifting season does not affect the drying, as the drying only takes place during the next warm season. In this case, the whole warm season, i.e. the time when the bog is melted, can be used to lift the peat, and there is no need to worry about whether the peat has time to dry before winter comes.

This method has been improved in Swedish Patent 26,778 by postponing the lifting for a longer winter period, during which the peat is lifted directly into suitable storage facilities to freeze and in the following warm season to thaw and dry. In this method, the surface of the bog is protected against freezing in the autumn, so the peat is lifted in its substantially molten state.

Freezing of peat to enhance drying has also been utilized in the process of Swedish Patent 26,062, which has further developed the process of the aforementioned Swedish Patent 24,896 by treating frozen peat as frozen mechanically to disrupt the cellular structure of peat more completely than by freezing alone. The chopped peat is allowed to thaw, allowing the water to be squeezed out of it even more efficiently than if the peat had simply been frozen before pressing.

One method of breaking the cellular structure of peat using freezing is disclosed in Swedish patent publication 112 152, in which the peat is artificially frozen in the bog and allowed to re-melt before the peat is lifted. Freezing and subsequent thawing then causes the cell structure to break, as in the methods described above, and the raised peat is easier to dry than the peat raised in its natural state.

However, the methods according to these publications have not been able to take into account the essential aspect of the present invention that the peat would be lifted from the bog when frozen. This achieves all the drying-related advantages described above, as well as the considerable advantages associated with the peat-raising step itself.

If the peat is lifted from the bog in its frozen state according to the invention, the structure of the peat is not unnecessarily broken during the lifting phase even by using a mechanical milling method, but the natural structure of the peat remains substantially unchanged, which is especially important for growing peat. In addition, the extraction of peat can be mechanized much more efficiently than has hitherto been possible. The peat can be lifted, for example, into suitably sized pieces which can be removed directly from the bog by cutting, for example with a mechanical cutting device, and further lifted mechanically and transported for further processing using efficient machines. The frozen swamp also allows easy use of the machines.

Because the method is based on the freezing of the bog, the bogs do not need to be drained beforehand, which speeds up their implementation for years.

Experiments have shown that the method can also be used to make very small pieces that dry many times faster than previously used peat pieces. When raised on plastic, the small pieces of peat have dried in the spring wind and sun even before the bog has melted.

With the new method, there is no need to build expensive roads, as transport can be handled to processing plants or hard land when the ground is frozen.

This new method of peat extraction will help to prevent severe winter unemployment in the peat and agricultural sector and reduce the underutilization of machinery during the winter season.