SU897253A1 - Radial shelf-type settler - Google Patents

Description

(54) RADIAL SHEET SHRINK

I

The invention relates to devices for the separation of suspensions under the action of gravity and can be used in the chemical, pulp and paper and other sectors of the industry, in particular for the purification of waste water from mechanical impurities.

The closest in technical essence and the achieved effect is a settling tank comprising a housing, a cone-shaped bottom, a sewage distributor, a raking device made in the form of blades fixed on a spatial truss, and radially arranged inclined settling shelves placed above the raking device 11

A disadvantage of the known device is that a part of the initial suspension, an inter-arboreal mine, can enter under the blocks of inclined shelves, a reduction in separation efficiency occurs as the initial suspension dilutes the precipitate n

under the blocks in the drain chute. In addition, the gap in the lower part of the blocks in the peripheral part of the settling tank in the zone adjacent directly to the drain chute allows the clarified fluid passing through the interlab space to dilute the sediment and turbid sediment (by scrape it with paddle blades) peripherals on the order of 1 m / s) fall

10 in clarified water.

The purpose of the image is to increase the efficiency of settling by preventing the transfer of the turbid medium to the zone of clarification.

15

The goal is achieved by the fact that the sump, which includes a housing with a bottom, a sewage distributor, a raking device and inclined settling shelves, is equipped with suspended ring-shaped aprons located between the racks and the raking device at a distance from the edges of the shelves. In addition, the proposed settling tank is equipped with an annular reflector placed on the blade of the raking device, while the reflector on the side of the working surfaces of the blades in the direction of rotation of the raking device has windows whose height corresponds to the height of the blades. FIG. 1 shows the proposed apparatus, a vertical section along the axis; in fig. 2 — node G in FIG. one; in fig. 3, node 5 in FIG. 2; in fig. 4 is a view A of FIG. 2 I in FIG. 5 - section bb not figs. 4 J in FIG. 6 is a sectional view in FIG. 4 in FIG. 7 - section G-Y in FIG. one. . Ostoyshsk consists of a cylindrical body 1 with a conical bottom 2, a supply pipe 3 located under the body 1, a device for evenly distributing the initial suspension of water input, made in the form of a pipe 4 perforated along its entire height 4 coaxially with the body 1, blocks 5 assembled from radial inclined shelves 6 and 7, fastened by means of a frame 8 of pipes, a raking device consisting of flat farm 9 and loops 10 and located in the space between blocks 5 and the bottom 2 of the body 1 of bridge 11, located above Kornyco i 1 is above the water level in the sump with peripheral drive 12, the star-shaped horizontal frame 13j of the drainage chute 14 and the sludge collector. Blocks 5 are distributed evenly around the circumference of the sump, made in the form of individual sectors and directed from the center to the periphery. In the central part of the sludge inside pipe 4 are located around the circumference of the rack 15, on which the plate 16 of the frame 13 is mounted. On the plate 16 there is a ring rail on which the rollers of the frame 13 rest. The frame 13 is a four-beam structure made of shaped corners and sew ler. The ends of the rays of the frame 13 are rigidly connected by rods 17 to the trusses 9 of the circumflexing device. The device for collecting sediment consists of prim 18 and scrapers 19. Shelves 6 and 7 are installed zigzig-like in a vertical section of two rus: upper and lower. I. The angle of inclination of shelves 6 and 7 in rus can be the same, or it can be different . The angle of inclination of the shelves 6 and 7 is taken to be greater than the angle of repose of the sediment so that its sliding in the liquid medium from the shelves takes place spontaneously. In the peripheral part of the bottom 2 of the settler, an annular support 20 is mounted to which radial beams 21 are welded. The inner ends of the beams 21 are interconnected by a vertical circular ring 22. The blocks 5 are provided with rollers 23 to move and rotate them when mounted, which are supported by annular channel bars 24, which mounted on radial beams 21. Blocks 5 are equipped with an inner 25 and an outer 26 aprons. The inner 25 and outer 26 aprons are installed respectively according to the inner and outer diameters of the blocks 5 and fixed in the zone of the lower bases of the blocks 5. The outer apron 26, which consists of separate sheets, is fixed, for example, by brackets 27, which are welded to the beams 21 The fastening of the inner apron 25, also consisting of individual sheets overlapping each other, is effected, for example, directly to the frames 8 of the lower parts of the fastener blocks 5. The attachment of the aprons 25 and 26 may be carried out in a different way, but with all the variants of their attachment, the gap between the side edges of the inclined shelves 6 and 7 (or elements rigidly connected to the shelves) and the aprons 25 and 26 should be minimal. On the upper bases of the flat trusses 9 concentric with the apron 25 inside it with a minimum clearance, a wheel reflector 28 is installed, in which windows 29 are made to exit the sediment. The number of windows 29 corresponds to the number of blades 1O, and the windows 29 are located on the side of the working surfaces of the blades 10 in the course of their rotation. The height of the windows 29 corresponds to the height of the raking blades 10, the sump works as follows. The initial wastewater containing mechanical suspension is fed from the bottom through the supply pipe 3 into the perforated distribution pipe 4, through the holes in the wall of the pipe 4 water enters the body 1 into the space between the outer surface of the pipe 4 and blocks 5 of the inclined shelves. The original waste water for calculating the annular reflector 28, the inner apron 25 and the minimum gap between the annular,

the reflector 28 and the inner apron 25 fully enter the interpolation space of the blocks 5; The passage along the space between the shelves is at an even speed, the waste water is below. the action of gravitational forces is divided into component parts. With this, solid particles are deposited on the upper surfaces of the shelves 6 and 7 and form a sediment layer. As the layer increases, the sediment creeps to the bottom 2 of the settling tank. The clarified water passing through the blocks 5 collects in the clarification zone immediately adjacent to the drain chute 14. Due to the external apron 26, the clarified water does not dilute the sediment under blocks 5 and without collecting solid sediment particles from the zone under blocks 5 it collects in the drain chute 14 and assigned to the destination. When the bridge 11 is rotated from the actuator 12 through the frame 13 and the rods 17, the torque is transmitted to the raking device. During the rotation of flat trusses J of the raking device with blades 1O, sediment moves along bottom 2 from the periphery to 1yuntra. When moving, the sediment is partially stirred up, however, due to the presence of an outer apron 26, it is not carried into the clarification zone, which lies adjacent to the drainage chute. 14. Moving from the periphery to the center by the working surfaces of the blades 1O, the deposit enters the windows 29 of the rotating annular reflector 28, and then is scooped up by the blades 10 in at the bottom 18, from which it is removed for its intended purpose.

If during the work it is necessary to inspect, check the condition of the shelf surfaces, then the corresponding blocks 5 are shifted, mixing on the Rollers 23 through the ring channels 24 to such an extent that between the f5 blocks there is an opening sufficient to take them out of the housing 1 using a lifting device . When the blocks 5 are being pulled out, the individual sheets constituting the inner apron 25 are removed together with the blocks 5, and the outer apron 26 is located in the cavity of the housing 1. Due to the fact that the sump is equipped with an inner and outer apron, the efficiency of the settling process. In addition, by supplying the settling tank with an annular reflector with windows for the placement of sediment, the efficiency of settling is enhanced.

The proposed radial shelving tank is simple to manufacture and is reliable in operation. Blocks of inclined shelves can be removed for repair or removal from the sticking solid phase from the cavity of the apparatus without stopping and yielding it.

Claims (2)

1. Radial shelving tank, comprising a housing, a cone-shaped bottom, a sewage distributor, a raking device made in the form of blades fixed on a spatial farm, and radially arranged inclined settling shelves placed above the raking device, characterized in that preventing the removal of the disturbing medium into the zone of clarification, the settling tank is equipped with. suspended ring-shaped aprons located between the shelves and the raking equipment by the distance from the edges of the shelves. 2. The sump of claim 1, wherein it is provided with rings with a reflector placed on the blades of the raking device, while in the reflector from the working surfaces of the blades in the direction of rotation of the raking device sleep, the height of which corresponds to the height of the blades. Sources of information taken into account in the examination 1, USSR author's certificate in application NO 2633798, cl. B 01D 21/24, 1978. tf V in-in GB fig b