SU998376A1 - Baffle settling tank - Google Patents

Description

(54) SHUTTERBOARD

The invention relates to a device for clarifying liquids and mo. It can be used for the mechanical treatment of industrial wastewater, in particular for the purification of wastewater of electroplating, containing suspensions of heavy metal hydroxides in ferrous and nonferrous metallurgy, coal, mining and other industries.

A device for clarification containing inclined plates arranged one above the other, forming between them a gap for withdrawing a thickened sediment along the longitudinal axis of the device, is known, and a vibrator connected to the plates and transmitting vibrations to them.

The disadvantage of the device is the unevenness of the flow rates of water in the interlaminar spaces, which leads to hydraulic overload of some sections when the OTHERS are underloaded and, as a result, to reduce the efficiency of clarification or performance of the device.

Closest to the invention to the technical essence and the achieved result is a device

including a housing, inclined precipitation plates placed in the clarification chamber and interconnected with a gap along the longitudinal axis of the housing; a device for introducing the initial fluid, made in the form of a collector with inlet nozzles adjacent to the interplate plates; fluid and sediment f2j.

A disadvantage of the known device is the re-capture of small precipitated particles and their return to

15 the interlaminar space by the counter flow of the liquid being cleaned, moving in the vertical gap between the plates, as well as the slowed-down creep of the sediment on the plates.

20

The aim of the invention is to increase the efficiency of clarification by preventing the re-entrapment of precipitated particles in a steady stream of liquid to be purified.

25

The goal is achieved by the fact that in a shelf settling tank containing a body, sloping precipitation plates installed with each other with a gap along the longitudinal

30 housing axis, input device

the original fluid, made in Viv, Yav collector with inlet nozzles adjacent from the side of the body to the interplate spaces, and a device for outputting the clarified fluid. vertical peaks attached to their lower edges, and the inlet nozzles are made conical. In this case, the sump is advisable to provide a vibrator connected to the plates.

FIG. 1 shows the proposed settling tank, longitudinal section, FIG. 2 - the same, cross section; in fig. 3 - manifold with conical inlets.

The sump includes a housing 1 with a kinematic bottom 2, inclined precipitation plates 3, mounted along the walls of the housing 1 with a slope to the center of the sump. The plates 3 are fastened with vertical diaphragms 4. The device for introducing the source liquid is made in the form of a collector 5 with conical inlets b, and on the bottom 2 of the housing 1 there is a device 7. for outputting the shrinkage. Body 1 has a partition 8 and a device for outputting a clarified liquid 9. A vibrator 10 is rigidly attached to the plates 3 to impart mechanical vibrations to them, which is associated with the truss. Collector 5 for introducing the treated liquid is made of a vertical pipe 11, a horizontal pipe 12, from which pipes 13 are branched.

The lower edges of the plates 3 have downwardly directed vertical visors 14, and the plates 3 form. between them, the gap 15 along the longitudinal axis of the housing 1 for the removal of sediment.

The device works as follows.

The liquid for cleaning under a small pressure is supplied through pipes 11 and 12 to the conical nozzles 6, where equal amounts flow into the spaces between the inclined ejection plates 3 evenly along their width. The small distances between adjacent plates 3 (40-60 mm) have a screening effect on the fluid flow between them, while the speeds along the width of the plates 3 are equalized and the fluid flows evenly along them. The suspension settles on the surface of the plates 3 and slides to the center of the settler. Between the plates 3 along the longitudinal axis of the housing 1 through

the formed gap 15 flows down a precipitate that is sliding down from the plates. The vibrator 10, working continuously, or periodically, contributes to a more intensive creep of 3 suspension particles deposited on the plates. The diaphragms 4 prevent the flow of the cleaned fluid in the gap 15 between the plates 3, and in addition, fasten the plate 3 and make the structure harder. Vertical peaks 14

plates 3, directed downward, also contribute to the Isolation of the central space (gap 15) from the flow of the purified liquid.

The purified liquid from the space between the plates 3 flows. into the chamber separated by the partition 8, from where it flows by gravity from its upper part into the device 9-for feeding the clarified liquid. The sediment accumulates on the bottom 2 under the plates 3 and is discharged through the device 7. The plates 3 are cleaned from that part of the sediment, which for various reasons accumulates on their surface, is performed by means of the vibrator 10.

The use of the invention makes it possible to increase the efficiency of liquid clarification, since the flow of the liquid being cleaned is evenly distributed throughout the living section of the settler, which is important for ensuring uniform loading of all the plates. In addition, the opposite movement of the liquid and the sediment-1 flows is excluded, the plates are not often cleaned, either ;. for this, a vibrator is provided.

Claims (2)

1. Shelf stopper, comprising a housing, inclined crying plates installed: interconnected with a gap along the longitudinal axis of the housing; liquid and sediment, about tl and h a-yushch and with the fact that, in order to increase the efficiency of clarification by preventing re-capture of the precipitated particles oncoming of the flow of the purified liquid, the sump nabzhen rigidly connected to the vertical plates of diaphragms arranged in the gap between the plates, the plates are provided with downwardly directed vertical visors, attached to their lower edges, and introductory tubes are conical. 2. The sump according to claim 1, clause 5 and JJ 3 th u and with the fact that it is weak