SU1574243A1 - Vertical thinlayer settler - Google Patents

Abstract

The invention relates to wastewater treatment plants for contamination and improves the efficiency of clarification. The vertical thin layer settler contains a cylindrical body, a separating element in the form of several flat spirals having a common axis and adjacent to the body. The coils of the spirals are equally spaced from each other with an inclination to the axis and are made with a central hole. The nozzles for supplying the initial liquid and discharging the clarified liquid and the sediment are equipped with additional valves that form the system for flushing the sump. The use of spirals provides clarification of the source fluid due to gravitational and centrifugal forces. 2 Il.

Description

one

(21) 4353508 / 31-26

(22) 12/31/87

(46) 06/30/90. Bul No. 24

(71) Odessa Institute of Food Technology

them. M.V.Lomonosova

(72) M.M. Zaserklnny, T.B. Stolevich, V.A. Kvantidze and V.O. Putintsev

(53) 66.066.7 (088.8)

(56) USSR Copyright Certificate No. 716566, cl. B 01 R 21/00, 1979 (published).

USSR Copyright Certificate № 1263293, cl. On 01 D 21/02, 1985 (published).

(54) VERTICAL THIN-LAYER DRAWER

(57) The invention relates to devices for CLEANING WASTE WATER O i PMR and allows to increase the efficiency of clarification. The vertical thin layer settler contains a cylindrical body, a separating element in the form of several flat spirals having a common axis and adjacent to the body. The coils of the spirals are located at an equal distance from each other with an inclination to the axis and are made with a central hole. The nozzles for supplying the initial liquid and discharging the clarified liquid and sediment are equipped with additional valves forming the sump flushing system. The use of spirals provides clarification of the source fluid due to gravitational and centrifugal forces. 2 Il.

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The invention relates to wastewater treatment plants from suspended pollutants by precipitating them under the influence of gravity and centrifugal forces during thin layer settling, and can be used to clarify the wastewater of mills and other grain processing enterprises.

The purpose of the invention is to increase the efficiency of clarification and reduce energy consumption.

FIG. 1 schematically shows a preliminary vertical thin layer settler, longitudinal section; in fig. 2 - the same cross section.

The vertical thin layer settler contains a cylindrical housing 1, a cover 2, a branch pipe 3 supplying a clarified liquid with valves 4 and 5, a separating element 6 in the form of several flat spirals having an oblique axis, installed without a gap to the body. The coils of the spirals are located at equal distance from each other, are inclined to the axis and have a hole 7 in the center, and are connected by means of vertical connecting rods 8. The sump also contains partitions 9, the bottom 10 of the compartment with separating elements with a pipe 11 attached to it release of sediment into

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which has an opening 12, a partition 13 (Fig. 2), a nozzle 14 for discharging clarified water with valves 15 and 16, a sludge trap 17, a discharge nozzle 18 for discharging sludge and a sluice gate 19.

Thin-bed settling works as follows.

The clarified liquid through the inlet 3 and the inlet valve 5, with the valve 4 closed, enters the space between the spirals, where the process of gravitational and centrifugal sedimentation takes place, and J5 each elementary layer of waste water settles throughout the whole spiral from the inlet 3 of the clarified liquid to the outlet pipe 11. This elemental layer of wastewater is cleaned, gradually moving in a spiral under the action of the backwater of the wastewater and the removal of clarified water. The partition 9 prevents water 25 from entering the space between the 2 liter top with the upper part of the separating element 6, and the installation of spirals without a gap to the housing 1 prevents the clarified liquid from moving outside the space between the spirals. The sediment under the action of centrifugal gravitational forces slides to the holes 7 and then into the pipe 11, after which it enters the sludge collector 18, a small part of the sediment separates from the water in the final turn of the spirals under the influence of centrifugal and gravitational forces and enters the hole 12 of the pipe 11 and then also to the sludge collector 17. Then, the sediment through the discharge port 18 for discharging sludge and the lock valve 19 is removed from the sump. The use of a sluice gate allows you to adjust the speed of the sludge removal, and hence the rate of sludge entering from the holes 7 into the pipe 11 and further into the sludge collector 17.

The clarified water through the nozzle 14 of the outlet of the clarified water and the open valve 15 when the valve 16 is closed is discharged from the sump, pending 15742434

The rod 13 prevents the passage of part of the clarified water into the space between the end of the separating element 6 and the bottom 10.

When silting up the vertical thin layer sump, valves 5 and 15 are closed and valves 4 and 16 are opened, after which the sump is cyclically washed, first with water flow from valve 4 to valve 16, and then from valve 16 to valve 4.

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By using several flat spirals with openings in the center and with inclination of the plane of the spirals to these holes, with the supply of clarified liquid only to the upper end of the spiral and removal of the clarified liquid only from the lower end of the spiral, the deposition path is increased many times, and therefore In the same amount, the efficiency of wastewater clarification increases, the use of a valve system to prevent silting up of the proposed vertical thin-layer sump reduces energy consumption for wastewater clarification. s waters and simplifies the structure of the settler.

Claims (1)

Invention Formula A vertical thin layer settler containing a cylindrical body with a separating element, a sludge trap, nozzles for supplying the initial liquid and discharging the clarified liquid and sludge with valves, characterized in that, in order to increase the efficiency of clarification and reduce energy consumption, the separating element is made in the form of several flat helixes, having a common axis, adjacent to the body and connected with vertical rods, with the turns of the spirals being equally spaced from each other with an inclination to and and formed with a central hole, and supply and discharge pipes are provided with additional rectifiers. 0 5 50 0 five 0 five By using several flat spirals with openings in the center and with inclination of the plane of the spirals to these holes, with the supply of clarified liquid only to the upper end of the spiral and removal of the clarified liquid only from the lower end of the spiral, the deposition path is increased many times, and therefore In the same amount, the efficiency of wastewater clarification increases, the use of a valve system to prevent silting up of the proposed vertical thin-layer sump reduces energy consumption for wastewater clarification. s waters and simplifies the structure of the settler. Invention Formula A vertical thin layer settler containing a cylindrical body with a separating element, a sludge trap, nozzles for supplying the initial liquid and discharging the clarified liquid and sludge with valves, characterized in that, in order to increase the efficiency of clarification and reduce energy consumption, the separating element is made in the form of several flat helixes, having a common axis, adjacent to the body and connected with vertical rods, with the turns of the spirals being equally spaced from each other with an inclination to and and formed with a central hole, and supply and discharge pipes are provided with additional rectifiers. sixteen