SU394976A1 - DEVICE FOR WATER DECOMPOSITION - Google Patents

Description

FIELD OF THE INVENTION The invention relates to the field of paper production and relates to devices for the dewatering of aqueous and pulp in the manufacture of paper.

Devices are known for dewatering water pulp and making paper containing a frame, a chest shaft, an upper and a lower moving mesh, a stationary pressure device that draws together a moving mesh, and a suction box.

However, the known devices do not provide sufficient speed and high quality dewatering and pulp.

The purpose of this invention is to create such a device design that would provide high speed and quality of pulp dehydration.

According to the invention, in a device for dewatering water pulp, a stationary pressure element made in the form of a box is installed in a suction box and provided with a decle fixed on its side wall, limiting the width of the grid and the blades arranged at an angle to the oncoming branch of the moving net. the blades are wavy with tilted edges and spaced longitudinally along a parabolic curve, the zero point of which is in

2

one vertical plane with the axis of the chest shaft.

FIG. 1, 2, and 3 schematically depict portions of a device for dewatering a water pulp; pas figs. 4 - static clamping device with blades, top view; in fig. 5 - the same, side view.

The high-speed device 1 is intended for the formation and supply by the furnace of a horizontal high-speed jet of mass obtained from a homogeneous suspension of tangled, jointly moving fibers on the lower portion of the grid 2 overlying the top

the rotating drive shaft 3, the chest shaft 4 and the camshaft 5. All the shafts 3, 4 and 5 rotate in the supports installed in the housings 6. It moves from the forming mesh along the path from the chest shaft 4 to the caster shaft 5 over

a number of suction drawers 7, 8, 9, 10, 11 of a known type, which form a vacuum under the forming net during the movement of the mass or a paper web on the forming grid 2, provide a dehydration

mass or paper web. The supporting structure of the aspirators 7, 8, 9, 10, 11 is indicated in FIG. 2 and 3 by numbers 12 and 13. On the support structure of the suction box 7 shown in FIG. 2,

The transverse frame 14 with the knife 15 is installed, the Knife 15 is not supported and supports the lower side of the forming mesh 2, and at the same time helps to remove water droplets that tend to accumulate on the lower side of the forming mesh 2 directly in the running zone of the stationary clamping element 16 (shown on Fig. 4 and 5). The front rounded edge / 7 of the knife contacts the underside of the mesh 2, followed by a generally flat or planar surface, gradually moving away from the underside of the mesh at a relatively large angle of about 5 ° and providing a suction effect that promotes the removal of water. The knife 15 is mounted on linings or other similar media that allow for adjusting the vertical knife incline (schematically indicated on the support frame 14 by the double-sided arrow A). With the lower branch of the net 2, the tensioning shaft 18 of the moving net is jointly equipped with adjusting means that change the total tension of the forming net 2 (also indicated by a double-sided arrow L). The relative position of the mesh between the top of the chest shaft 4 and the top of the knife 15 can be changed not only by adjusting the position of the knife, but also by adjusting the tension of the grid 2 with the help of a tension shaft. FIG. 1 The device providing high-speed mass flow has an internal channel 19, the width of which is equal to the width of the net or belt conveyor 2. The device / for feeding the mass is mounted on the lower support structure 20 and in housings 21 and 22 on which the device 23 is installed to form a horizontal jet a mass that is supplied from the tank 24 by a controlled flow using a device for creating pressure on the mass, for example a pump. The stitch flows out of the hole or slit 25 in a horizontal direction mainly along the top of the chest shaft 4 or with a deviation of 10-15 ° from the top of the chest shaft. The upper forming mesh 26 passes iodine by a static pressing element, enveloping the direction and tensioning shafts 27, 28, 29, 30, 31 and 32. Korpu 6 is filled with vertically arranged elements 33, 34 and 35, of which the latter (55) serves as a reference the design for the guide shaft 32, which provides rotation and removal of the upper forming fabric 26 from the formed paper web, carried away by the lower forming fabric, as shown in FIG. 3. The upper on-off element 35 is also the main support of the couch-press consisting of a flat bottom caster-shaft 5 and an upper press caster-shaft 36 installed in the hinges 37 and 38. The fixed bows 38 are connected to the power cylinder 39, connected , in turn, with the process core 5 10 15 20 25 30 35 40 45 50 55 60 65 pus 40. The clearance of the caster shaft, which is the gap between the forming grids 2 and 26 with smooth press rolls 5 and 36, is adjusted with the help of the hinge 37. In this way, the removal of water is carried out with the help of mechanical means until subsequent processing ki paper web when passing it through the rest of the paper machine. Elements 33 and 34 of the structure are associated with transverse frames 41 and 42 located on opposite sides of the forming grids 2 and 26. On the vertical element 34, a bearing housing 43 is fixed, for mounting the guide shaft 31 of the grid. In turn, the housing 44 serves as a continuation of the vertical element 33 and is used to install the guide shaft 28. A bearing housing 45 is fixed to the guide shaft 27 on the side of the vertical element 33. Proper adjustment of the tension gauge and tension shafts 29 and 30 is provided by conventional screw devices, respectively. 46 and 47. Bilateral arrows, indicated in both cases by the letter A, indicate the approximate direction of adjustment of the shafts 29 and 30, ensuring their effective use for driving and tensioning the upper The forming grid 26. The lower part of the clamping element (box 16) is mounted in the case 48 of the suction box, the front end of which, hingedly mounted on the rack 45, can be moved mainly in the vertical direction using a screw device 49. The rear end of the case 48 is mounted on frame 50 with it, on which screw device 51 is installed, providing a limited displacement or adjustable in the vertical direction, indicated by a double-side arrow A. Screw devices 49 and 51 are trimmed In this way, the relative rotation of the casing and the lower functional part of the crate 16, which is practically in contact with the inner side of the mesh of the forming mesh 26. At the rear end of the casing 48 there is a side suction 52, and inside the casing 48 there is a proper overflow threshold 53. Water can be sucked out through the psi 16, to drop through the threshold 53 and discharged from the side of the machine through the suction 52. The threshold 53 can to a certain extent regulate the level of water continuously accumulating in the lower part of the body 48, with the upper side of the body closed and in it using the suction 52 derzhivaets subatmospheric pressure. The upper forming mesh moves down, obsei the direction of the shaft 27 and the curved fixed surface or pad, indicated as a whole by the number 54, providing a directional movement of the mesh along

lateral edges 55-64 p of the transverse blades 65-74 installed inside the crate 16. Separate, transverse blades 65-74 that are longitudinally apart from one another are shown in vertical projection in FIG. 5 (through the side wall 75 of the crate 16) and partly in a plan view shown in FIG. four.

The upper edges of the blades retract from the upper edge of the side wall 75 of the box 16. A dekel or part limiting web width 76 attached to the side wall 75 extends along a side wall having a generally curved surface.

The paddles 65-74 extend downward from the open upper edges 77-86 to, respectively, the lower parts 87-96, which are joined and fastened to the top of the decal 76.

The central portions of the individual blades 65-74 are lowered below decal 76 (mounted on each side of box 16 and in contact with the upper side of the moving mesh 26 with their smoothly processed guide pins 55-64. Paddle 66 extends from top edge 78 down and to the left to section 88 along the edges adjoined to the compaction deck decle 76 and further to the edge 56 are in contact with the inner side of the loop of the upper moving mesh 26, which regulates the position of the latter. The extreme lower edges 55-64 of the blades 65-74 create relatively close each other A friend (in the longitudinal direction) is oior for moving grid 26 and has mostly aarabolic shape relative to the theoretical or imaginary straight line 97 considered here.

A sealing part 98, having a flange 99, is attached to the rear end of the box 16, which secures the box 16 to the case 48 of the suction box. The back flange 99 and the limiting width of the paper web of the deckle have holes B for mounting bolts 48. Sealing part 100 has a smooth bottom surface, which forms a continuation of the support surface of pad 54 and serves as the initial guide for the moving mesh 26. This initial guide surface has a generally cylindrical contour providing a smooth movement of the grid along it and a smooth and continuous supply of the movement of the grid 26 to the smooth lower edges 65-74.

The essential feature of the overall arrangement of the box 16 is the curvilinear contour of the forming or pressing surface, created by the lower edges of the arms 55-64 arranged in the longitudinal direction. In a preferred embodiment of the invention, this surface is shaped like a parabolic crisis, built mainly on a theoretical abscissa, running along the image line 97 (the increments of the coordinate are indicated in D with a double-headed arrow and in D), and the ordinate is defined by the axis CL in FIG. 5 (increments of ordinates are indicated in Fig. 5 by the letter I and a two-sided arrow). The intersection of abscissa 97 and ordinate CL forms the theoretical starting point of the parabola, where AND is the distance along the vertkalp (in inchivx) from line 97;

D - distance (inches) to the right or

in the positive direction from the CL line (FIG. 5); C and / {are constant values.

From FIG. 2 and 5, it can be seen that the upper moving grid 26 is fully supported on top of the smooth surfaces of the pad 54 and part 100, which bring the grid to the point PO (ft 5) on ordinate CL. Further, the height of the PI point (as well as a little more

the high point PQ), the height I of the moving grid 26 above the line 97 and, therefore, below the moving grid on the chest shaft 4, is basically the height of the mass flow jet that flows out into the slot 25.

The operation of the device.

The mass is passed through channel 19 of tea 24 at high speed in a horizontal direction. coinciding with line 97 in FIG. 5, and then through the slot 25 to the site

formation.

The critical zone of operation at the molding site is the descent of I1a from the leaf-forming zone, located directly behind the point where the mass exits from section 25 and

This is the converging gap in which the upper moving mesh 26 approaches the lower moving mesh 2, i.e. the place where water is sucked up from the mass suspension simultaneously up and down, left between both moving fibers 2 and 26, a fiber, image 1op1, its sheet or a fabric paper 101. Thus, the top grid 26 together with the bottom grid 2

they form a wall, through which a sheet of water can be sucked up and down. The proposed design, eliminating the possibility of the formation of a free surface between the mass and air, ensures the stability of the suspension during the suction of water from the mass, undertaken in order to form a paper sheet. Providing such stability at high speeds of work, it is necessary to provide

Such a convergence of the passage, so that the suspension is subjected to constant pressure during sheet forming, until the suspension strength of the structure becomes so great that an increase in the differential pressure between the movement grids 2 and 26 will not adversely affect the resulting paper sheet.

The position of the upper moving mesh 26 is relatively well defined by edges.

closely spaced blades 65, 66, etc.

delineating the previously described parabola. The longitudinal (linear) speeds of both moving grids 2 and 26 are equalized mainly with the help of known drive grids control mechanisms (not shown in the drawings).

The moving grids approach the zone of the parabolic curve mainly in accordance with the contours of the curve, while the parabolic curve dehydration itself is carried out at a constant mass pressure. After passing the parabolic curve of the xT grid: see together with the constant removal of water at elevated pressure.

The box 16 can work, for example, in conjunction with the lower movement of the grid paper paper curve, and not with its upper movement of its grid. The box does not need to have a truly parabolic shape of the working surface; he may deviate slightly from her. The bulk is thus dehydrated for further processing.

Subject invention

Claims (2)

1. A device for dewatering water pulp in the manufacture of paper, comprising a frame, a chest shaft, an upper and a lower moving mesh, a stationary clamping element bringing together moving mesh to each other, and a suction pad, characterized in that, with a speed increase and dehydration quality pulp, stationary clamping element, made in the form, is installed in the suction unit, and equipped with a decle fixed on its side wall, limiting mesh and the blades mounted at an angle to the oncoming branch of the moving mesh. 2. The device according to claim 1, characterized in that the blades are made with welded edges and spacing with an interval in the longitudinal direction along a parabolic curve, the bullet point of which is in the same vertical plane with the axis of the chest shaft. 2B 26 46 47 Jo 18 Fig 2 / / / II II I I 87 B 88 89 B 90 75 91 B 92. 75 1 5., I I I I u S3 B 94 So6 96 B4 B 65 B 6B 67 B 68 69 B 70 II p 12. 73 9S B / 1 / / I I / Ii / I 1 / /., /, / S y-i ir. L oo-. .-- Wh ..- ,. - ,, -. . GG71 / 1 I 1 1 L 568857 B9 B90 59 91 60 92 61 93 62 9 / L5 .9. K. 9fj - - -X X / x x-x- / / x - /