SU803952A1 - Radial shelf-type settler - Google Patents

Description

(54) RADIAL SHEET SHRINK

I

The invention relates to devices for separating suspensions under the force of gravity, in particular for the treatment of wastewater from mechanical impurities, and can be used in the chemical, pulp and paper and other industries.

A horizontal settling tank is known for separating suspensions, which includes a housing with a bottom, input of the initial liquid and output: purified liquid, inclined shelves and a sludge gathering mechanism located under inclined shelves 1.

A disadvantage of the known settling tank is the difficulty in handling, dismantling and replacing inclined shelves in blocks.

The closest to the technical nature and the achieved result to the proposed is a radial shelving tank for separating suspensions, including a cylindrical body with a conical bottom, input units of the source liquid and output of the purified liquid, a mechanism for collecting sediment mounted on supporting trusses and located

Above the truss-thin-bed module, made in the form of blocks of inclined -wires (2.

However, such a device is also characterized by difficulty in assembling, dismantling the unit of the shelves and replacing the inclined shelves when they are out of order, since the units are made with one-piece and fixedly fixed on the side wall.

The purpose of the invention is to increase the efficiency of use by providing mobility of blocks of a thin-layer module and ease of maintenance.

The goal is achieved by the fact that the settling tank is equipped with fixed and supporting, truss ring guide tracks and rollers installed under the blocks of shelves of the thin-layer module and supporting the ring guide tracks.

Thanks to the above design features, it is possible to move the blocks on the rollers along ring treads during dismantling during assembly, which improves serviceability, eases installation work and reduces maintenance costs.

FIG. 1 shows a sump, cross section; in fig. 2 - the same, top view; in fig. 3 shows section A-A in FIG. 2; in fig. 4 shows a section BB in FIG. 2; in fig. 5 shows a section B-B in FIG. 2; in fig. 6 — node 1 in FIG. five; in fig. 7 is a view; - FIG. five; in fig. 8 is a section of D-D. to FIG. I.

The proposed settling tank consists of a tub 1 of cylindrical shape with a conical bottom 2 of an input fluid injection unit consisting of a feed pipe 3 located under the tank 1 and a device for evenly distributing the initial suspension when entering, made in the form of a perforated pipe over its entire height of pipe 4 coaxial with the tank 1, a thin-layer module, made in the form of blocks 5, assembled from radial inclined shelves 6 and 7, fastened by means of a tube 8 frame, a sludge digging mechanism consisting of flat trusses 9 and blades 10 and iozhennogo in the space between the blocks 5 and the bottom of the vat 1 2 bridge 11, locates on the luminant vat 1 above the water level in the sump, with the peripheral drive 12, star-shaped horizontal frame 13, the output node ochischennsvd fluid and devices to collect the precipitate. The blocks 5 of the thin-layer module are evenly distributed around the circumference of the settling tank, executed in the form of separate sectors, directed from the center to the periphery, and provided with drain channels 14.

In the central part of the settler inside coarse 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 channels. The ends of the beams of the frame 13 are rigidly connected by rods 17 to the trusses 9 of the raking device. The sludge collector consists of 18 and scrapers 19.

The inclined shelves 6 and 7 of the thin-layer module block are installed in a zigzag manner (Fig. 3) in a vertical section of two Rus: the upper 6 and the lower 7. The angle of inclination of the shelves 6 and 7 in the bat may be the same, or it may be different. The inclination angle 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 occurs spontaneously. In the peripheral part of the bottom 2 of the settling tank, support trusses are mounted, which are an annular support 20, 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 for moving and turning them, mounted under the blocks 5 of the shelves of the thin-layer module and resting on the annular guide tracks 24, which are fixed on the supporting trusses. At the periphery, the blocks are held together at a certain interval by the clips 25.

The sump works as follows.

The source water containing the slurry is fed from the bottom through the inlet pipe 3 into the perforated distribution pipe 4. Through the holes in the wall of the pipe 4, water enters the cavity of tank 1 into the space between the outer surface of pipe 4 and blocks 5 of the inclined shelves 6 and 7. The initial suspension enters in interiolichnoe space blocks 5 thin-layer module. The passage along the space between the shelves 6 and 7 with the greatest speed, suspension under the action of gravitational forces, is divided into its component parts. In addition, solid particles are deposited on the upper surfaces of the shelves 6 and 7 and form a layer of sediment. As the layer increases, the sediment creeps to the bottom 2 of the settler. The clarified water, passing through the blocks 5, is collected in the drain chute 14 and discharged to its intended purpose. When the bridge 11 rotates, the drive 12 through the frame 13 and the rods 17 transmits the torque to the raking device. As the flat trusses 9 of the raking device with blades 10 rotate, the sediment moves along the bottom 2 from the periphery to the center at 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 of the thin-layer module are shifted, moving on the rollers 23 along the annular guide tracks 24 to such an extent that between the blocks 5 there is an opening sufficient for removing them from the cavity Chan 1 with a lifting device.

The proposed radial shelving tank is simple to manufacture and reliable in operation. Thanks to the rollers, the blocks of the inclined shelves can be moved inside the apparatus along the annular guide tracks. When mounting and dismounting such a radial block sump, the installation costs are reduced by 40% compared with the existing structures of the radial shelf sumps. Blocks of inclined shelves of a thin-layer module can be removed for repair or cleaning of sticking solid phase from the apparatus cavity (while leaving a part of the apparatus area working according to the principle of ordinary settling) without stopping and emptying it.

580

The use of one proposed radial shelving tank helps reduce operating costs and save 1 million rubles. in year.

Claims (2)

1. US Patent G 3717770, cl. 210.522, 17.04.73. 2.Baturov V.I. and Leibovsky M. G. Modern sedimentation tanks for water purification systems. M., stroiizdat, 1974, p. 39-40. / g Gto 23 fig Bb b - b Niggle eight Fieb AT g .7