RU2775716C1 - Apparatus for closing a secondary radial-flow settling tank - Google Patents

Abstract

FIELD: treatment of water.

SUBSTANCE: method relates to the field of water discharge. Apparatus comprises closing rings, a movable truss of a sludge scraper. The closing rings are made of trapezoidal or rectangular segments. The segments of the closing rings are rigidly interconnected. The segments of the closing rings are made of materials with positive buoyancy. The closing rings are made freely floating on the water surface. The closing rings are configured to rotate concentrically around the central axis of the settling tank. The closing rings are configured for free rotation of the sludge scraper provided with a scraper system and a triangular truss. The segments of the closing rings are equipped with a guarding skirt, thin-layered agglomeration modules with negative buoyancy. The guarding skirt is located on the external and internal perimeters of the segments of the closing rings. The amount of closing rings corresponds to the amount of gaps between the structural elements of the movable truss of the sludge scraper. The thin-layered agglomeration modules are attached to the segments of the closing rings by rigid suspensions.

EFFECT: increase in the efficiency and reliability of biological treatment of waste water.

1 cl, 4 dwg

Description

The device relates to the field of wastewater disposal, as well as to wastewater treatment devices at sewage treatment plants.

The closest analogue to the claimed method is a utility model patent RU No. 2557573, Overlapping for a radial settler, published on July 27, 2015 Bull. No. 21, made composite of the central, middle and peripheral rings, while the central ring is fixedly fixed to the central support of the settler, the peripheral ring is fixedly fixed on the peripheral part of the settler bowl, and the middle ring floats on the water surface and is made with the possibility of concentric rotation relative to the central and of the peripheral rings together with the movable truss of the sludge scraper, the middle ring is made with a gap under the movable truss of the sludge scraper, in which the floor sector under the truss (SPF) is suspended with the help of brackets.

There is a development option when the SPF is made of a trapezoidal shape in the form of a frame of pipes sheathed on top with metal sheets.

There is a development option when the sides of the floor sector under the truss have drops from pipes or a corner 500-2000 mm long.

There is a development option when the transfer of movement from the sludge scraper truss to the middle ring of the floor is carried out by the sides with the lowering of the floor sector under the truss.

There is a development option when the gap between the middle and fixed rings of the overlap is closed with the help of strip brushes fixed on the fixed central and peripheral rings.

There is a development option when the gap between the middle and fixed rings of the overlap is closed with the help of sheets of rubber or polymer fabric bent in half along the long side, while the long edges of the sheet are connected together and fixed on the fixed central and peripheral rings in the form of a bubble due to the elasticity of the material, and the fold of the bubble is in contact with the middle ring of the overlap.

There is a development option when stripe brushes consist of a metal profile, inside of which a cassette with a pile is inserted from a material that is resistant to aggressive waste water: polyamide, polyvinyl chloride, polypropylene or polyester.

There is a development option when the diameter of the pile is 0.1-1.0 mm, the length of the pile is 30-250 mm.

There is a development option when the profile can be made of various materials: stainless steel, aluminum, polymer.

There is a development option when the profile can be made H-shaped, h-shaped or U-shaped.

There is a development option when the rubber or polymer fabric seal has a thickness of 0.5-6 mm.

There is a development option when the length of the bubble is 30-250 mm.

There is a development option when the peripheral ring of the overlap consists of sections having a trapezoidal or rectangular shape.

There is a development option when the gap between the rectangular sectors is closed with a triangular sheet metal insert.

There is a development option when the sectors of the peripheral ring of overlap in the area of the board have a visor in the form of a metal strip.

There is a development option when inspection hatches are located on the peripheral and central rings in the amount necessary to ensure the technological process for monitoring the quality of wastewater.

There is a development option when inspection hatches are attached to the peripheral sectors of the ceiling using a loop connection and have a rubber seal around the perimeter to ensure tightness.

There is a development option when the peripheral and central rings of the floor have a slope, respectively, from the side and from the central support towards the middle ring of the floor, sufficient to drain rainwater.

There is a development option when the middle overlap ring is made of sectors.

There is a development option when the sector of the middle overlap ring is made in the form of a frame made of a profile pipe, sheathed on both sides with sheet metal 0.5-1.5 mm thick.

There is a development option when the frame of the sectors of the middle ring of the overlap consists of shaped pipes forming a contour along the perimeter, and/or shaped pipes-jumpers, while at least one of the pipes is made airtight.

There is a development option when each sector of the middle overlap ring along the entire length of the lateral side has seals in the form of a rubber or polyurethane roller.

There is a development option when at least one winch with an electric motor is fixed on board the sump and / or on the sludge scraper farm.

There is a development option when the number of winches varies depending on the diameter of the sump.

There is a development option when the speeds of unwinding and winding of the winch cables are synchronized with each other and coincide with the speed of emptying or filling the sump with water.

There is a development option when a flow damper is installed concentrically around the central support, which is a frame made of a profile stainless pipe, sheathed on the outside with stainless sheets and mounted on supports.

There is a development option when the height of the flow damper frame, sheathed with stainless sheets, is 0.4-0.75 of the sump depth.

There is a development option when the flow damper protrudes 50-150 mm above the water surface.

There is a development option when guides are vertically located on the outer edges of the flow damper for additional centering of the middle overlap ring when emptying or filling the sump with water.

There is a development option where the number of guides on the flow damper can vary depending on the diameter of the sump.

The disadvantage of this overlap is the complexity of the design in manufacturing, the metal content of the structure, the impossibility of using the structure on existing (operating) secondary radial settling tanks - without making changes to the building structure of such settling tanks, which is due to the presence of embedded parts and assemblies.

The technical result, to which the invention is directed, is to increase the efficiency and reliability of biological wastewater treatment due to:

reducing the impact of wind surge and, as a result, the removal of suspended solids;

the use of thin-layer agglomeration modules that increase the efficiency of sedimentation of suspended particles;

reducing the contact area of the mirror of the cleaned environment with atmospheric air, thereby reducing the amount of fumes and odors entering the atmosphere;

simplifying the design and reducing the metal consumption of the structure.

Distinctive features of the proposed device for overlapping the secondary radial clarifier are:

1. Making overlap rings from segments having a trapezoidal or rectangular shape;

2. The implementation of the segments of the overlap rings in the form of rigidly fixed to each other;

3. Making overlap rings from materials with positive buoyancy;

4. Making the overlap rings freely floating on the surface of the water surface;

5. Execution of overlap rings with the possibility of concentric rotation around the central axis of the sump;

6. Making overlap rings with the possibility of free rotation of the sludge scraper having a system of scrapers and a triangular truss;

7. Additional supply of overlap ring segments with a wallpaper skirt;

8. Additional supply of sintering thin-layer modules with negative buoyancy;

9. Placement of the impact skirt on the outer and inner perimeter of the segments of the overlap rings;

10. Selection of the number of rings according to the number of gaps between the structural elements of the movable truss of the sludge scraper;

11. Attachment of sintering thin-layer modules to the segments of the floor rings with rigid hangers.

According to the information available to the authors, the distinguishing features No. 1,2,7 are known, while the rest are not, which meets the condition of patentability "novelty".

The invention is explained with the aid of the drawings below.

Fig. 1 is a general view of a radial settler with a silt scraper.

Fig. 2 is a general view of a radial clarifier with overlap.

Fig. 3 - section of a radial settler with overlap.

Fig. 4 is a block diagram of a sintering thin-layer module with an overlap segment.

The device for overlapping the secondary radial clarifier consists of (Fig. 1-4).

The radial clarifier is a tank 1 with a central support 2, an overflow tray 3, supported by reinforced concrete crossbars 4, located around the entire circumference of the clarifier. Inside the settler there is a flow damper 5, a sludge scraper 6, having a system of scrapers 7 and a triangular truss 8. In working condition, the settler 1 is filled with water. To reduce evaporation from the water surface and reduce the removal of suspended solids due to wind surge and wave formation, it is closed with an overlap 9. To improve the efficiency of cleaning from suspended pollutants, it is equipped with sintering thin-layer modules 14.

The overlap 9 of the water mirror is made up of three rings - central 10, middle 11 and peripheral 12. Rings 10, 11 and 12 are located concentrically to each other, consist of segments (sections) 13 having a trapezoidal or rectangular shape, which are rigidly fixed to each other and have positive buoyancy. The segments of the overlapping rings have a rebound skirt 14 along the inner and outer perimeter. The baffle skirt is designed to exclude the possibility of hummock (piling up) of overlapping rings on each other, as well as on the design of the sump. The overlap rings 10, 11 and 12 float freely on the water surface and are made with the possibility of concentric rotation.

Agglomeration thin-layer modules 15 have negative buoyancy and are connected by rigid suspensions 16 with segments (sections) of overlap rings 13 of floating rings 10, 11, 12.

Claims (16)

Device for closing the secondary radial clarifier, containing rings of overlap, a movable truss of a sludge scraper, different in that overlap rings are made of segments having a trapezoidal or rectangular shape, the segments of the overlap rings are rigidly fixed to each other, overlap ring segments are made of materials having positive buoyancy, overlapping rings are made freely floating on the surface of the water mirror, overlap rings are made with the possibility of concentric rotation around the central axis of the sump, overlap rings are made with the possibility of free rotation of the sludge scraper having a system of scrapers and a triangular truss, the device is additionally equipped segments of the overlapping rings, equipped with a baffle skirt, agglomeration thin-layer modules having negative buoyancy, wherein the impact skirt is located on the outer and inner perimeter of the segments of the overlap rings, the number of overlap rings corresponds to the number of gaps between the structural elements of the sludge scraper movable truss, sintering thin-layer modules are attached to the segments of the overlapping rings by rigid hangers.

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