FI67324B - PRESS FOER SAMMANPRESSNING SAERSKILT AV BARK OCH MATERIAL AV LIKNANDE ART - Google Patents

Description

67324

A press, especially for compressing a shell and the like

The present invention relates to a press, in particular for compressing and releasing a shell and the like, from water or other liquid, comprising a pressing chamber, the wall of which is perforated for removing liquid and provided with a pressurized material inlet and a pressurized material outlet, to which force members for pressing the material against the wall of the pressing chamber are connected. The press according to the invention is particularly suitable for compressing bark waste obtained in pulp mills and sawmills to a dryness suitable for incineration.

Pistons based on piston, chain mat, roller and screw principles are known in the past, which have the common disadvantage of strong wear phenomena. In the above-mentioned presses, the shell to be pressed must also be moved forward at a certain stage of the pressing step. In this case, the perforated plates around the compressed shell naturally resist the lateral transfer of the substance. In the pressing phase, the shells and sticks packed in the holes are also subjected to a kind of shear force when the pile of shells is moved forward. Only part of the surface pressure for compression will be used for the original purpose from which the desired dry matter content suffers. In addition, the presses of the two cylinders rotating in the same direction have great difficulties in winter, as their wet steel surfaces do not carry the shell containing ice cubes to the pressing point, but remain in front of the rollers, forming a blockage on the feed side. This is particularly evident in a press formed by two cylinders rotating inside each other, the centers of which do not coincide. The press is therefore only suitable for summer use. Furthermore, in the above-mentioned type of press, the shell to be pressed is subjected only to the so-called linear compression. The poorness of the result is then readily conceivable when one thinks that at some point the pile of bark is only a small piece of wood and which cannot be avoided today in the age of widespread drum peeling. Once the line has been subjected to line-like pressing, the shell swells like a sponge immediately after being pressed and, like the sponge, sucks water from it immediately after the line pressure point.

The object of the present invention is to eliminate the above-mentioned drawbacks, and to achieve this the press according to the invention is characterized in that the pressing member consists of a plurality of adjacent, pivotally mounted away from it.

According to the invention, a lamella press with a very simple and efficient structure is provided. Since the lamellae only compress the shell during the pressing step and do not push it forward, the energy sacrificed for pressing is applied exclusively to the surface pressure and thus no abrasive phenomena rubbing against the walls also occur. In the device according to the invention, the lamellae are used not only as pressing elements, but also as a barrier for the shell to escape in the incoming direction. The invention also provides the possibility of using hydraulic means for actuating the pressing member and the perforated casing in synchronism with each other. Thanks to the invention, a high power, a very homogeneous dry matter content and a press are provided, which is insensitive to the annoyance caused by the ice cubes in the shell in winter.

3,67324

The invention will be explained in more detail below with reference to the accompanying drawing, in which Figure 1 schematically shows the press in a partial section seen from the side.

Figure 2 shows a partial section of the press seen from above.

The shell press shown in the drawing comprises a rigid base 10 on which the required number of support and guide wheels 11 supporting the casing 3 are arranged. the discharge mechanism through the opening 9. The actuator of the cylindrical perforated rotating jacket 3 is not shown in the figure. Similarly, the drive mechanism of the lamel-lie la is not drawn. The pressing surface of the pressing lamellae 1a is toothed 13, which prevents the shell to be pressed from being extruded under the lamellae. The toothing 14 is coated with a water and resin repellent.

The shell press operates as follows: The shell to be pressed is led through the feed opening 7 into a space 16 built inside it for the press. The pressing member 1 is then in the upper position. When the shell is suitably added to the feed chamber 16, to provide the level controller 15 lähtöimpulssin to rotation of the cylindrical mantle 3 in the direction of arrow 5, wherein the shell has to be pressed under the top position of the press member. Then the jacket 3 the rotation is stopped or almost stopped and the pressure element 1 leaves the direction of arrow 4 in the opposite direction and lamel-lit Ia start to squeeze the wet shell such as a piano keyboard from the center and proceeding from the edges toward the whipping, the water leaving will more easily sides and through the sheath 3 holes. The songs 1a also have longitudinal water grooves to facilitate the easiest escape of water. When the outer sipes have made the end of the compression movement, is becoming more difficult throughout the disc set simultaneously in the casing 3 while making a very small rotational movement in the direction of the arrow 5.

r: 4 67324 whereby the compressible shell is further tightened as if the steel wire was between the traction frogs. The compression member rotates after a whole in the direction of arrow 4 .yläasentoonsa, and the housing 3 takes a rotational motion of pressed shell poistolai IFY 9-on, and at the same time the press member 1 will be less than the new compressible shell, the shell is stopped and the pressing step is followed again by re just in the manner described.

The drawing and the related explanation are only intended to illustrate the idea of the invention. The details of the device according to the invention can vary considerably within the scope of the claims. Thus, it is possible to allow the jacket to make e.g. a sinusoidal curve and to suitably synchronize the movement of the pressing member.

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Claims (6)

1. Press for compression especially of bark and material of similar nature and for expelling water or other liquid therefrom, consisting of a press space (16) whose wall (3) is perforated for removal of liquid, and which is provided with an inlet opening (7) for the material to be compressed (6) and an outlet opening (9) for the compressed material (8), wherein a pressing means (1) is provided in the press space ( a power means for pressing the material against the wall (3) of the press space, characterized in that the pressing means consists of a number of pivotally mounted levers (1a) located adjacent to each other, the pressing surface (13) of which is facing the wall (3) of the press space (16). beak-shaped, wherein the force means have been adapted to pivot the levers (1a) against the wall of the press space and from it. Press according to claim 1, characterized in that the movements of the adjacent lamellae (1a) are timed differently for effecting a pumping pressing movement. Press according to claim 1 or 2, characterized in that the press space (16) consists of a horizontal bar (3) adapted to rotate incrementally or continuously. 4. Press according to claim 3, characterized in that the pivotal lever blades (1a) are directed so that their pivoting end is directed towards the rotational direction (5) of the cylinder (3). Press according to claims 2-4, characterized in that the stepwise rotational movement of the cylinder (3) is synchronized to the pressing movement of the slats (1a).