RU110656U1 - INSTALLATION (Sump) FOR SEWAGE TREATMENT - Google Patents

Abstract

 1. Installation for wastewater treatment (sump), comprising a tank having means for supplying source water, with a coarse sedimentation zone and thin-layer sedimentation zones located therein, equipped with radial-type segment units with thin-layer elements, characterized in that the segment units are installed in upper half of the water layer. ! 2. Installation according to claim 1, characterized in that at least two of the segment blocks of the zone of thin layer sedimentation consist of shelves of the same size and at least two of shelves in the form of a trapezoid, the dimensions of which increase in proportion to their location in the block from the center of the sump . ! 3. Installation according to claim 1 or 2, characterized in that the segment blocks are mounted on supporting structures in the form of strapping cantilever frames supporting the drainage system. ! 4. Installation according to claim 3, characterized in that between the segmented blocks, at the locations of the inclined elements of the cantilever frames, inclined-horizontal partitions and an annular vertically-inclined partition are installed.

Description

The utility model relates to installations (sumps) for the treatment of domestic wastewater, industrial wastewater with and without treatment with reagents and can mainly be used in the treatment and after-treatment of wastewater in sewage treatment plants and in water treatment.

Conventional radial sumps are known that are equipped with a common drainage and discharge chute, an annular and radial catchment chutes in their peripheral part with struts for trampling and fastening ring outflow trays for dispersed collection of purified water. Sumps are also known, equipped with thin-layer elements with a radial and upward flow of liquid, occupying its annular part and containing special supporting devices for supporting and installing them. [Fig. 7.16, 7.17 p. 417 “Disposal and treatment of waste water from St. Petersburg”, Novyi Zhurnal publishing house 2002].

However, this sump cannot provide the deep wastewater treatment currently required, as It provides for the main removal of suspended matter in a layer of great depth up to 6 m and a weakly turbulent mode of fluid flow in the volume of the entire sump, in which the smallest particles of contaminants do not linger in it and are carried out together with the purified liquid, since even dispersed liquid selection cannot provide deep cleaning from fine suspension during turbulent flow in the settler and a large depth of the deposition zone (up to 6 m) in it.

There are also various designs of such plants with thin-layer elements that occupy more than half of the settling area along the entire depth of the sump (SU No. 689958, 02 C 1/2, bull. No. 37 of 05.10.79) and other structures designed to separate suspensions and emulsions ( Ivanov VG, Simonov Yu.M. Application of thin-layer sedimentation tanks in the pulp and paper industry. M: Forestry 1989. Ivanov VG, Chernikov NA Drainage systems of industrial enterprises of St. Petersburg, Publishing House OM-Press ", 2007. S. 53-59, S. 63-65.

The proposed design is characterized in that the supporting part of the trays is simultaneously a support for mounting supporting structures that increase the inlet section area (by increasing the radius of its outer circumference), on which there are blocks with the reverse inclination of thin-layer elements of the radial type with upward movement of the liquid located under the catchment gutters.

Closest to the proposed solution is a sump [Fig. 7.28 p.432 “Sewage disposal and treatment of St. Petersburg” Novyi Zhurnal Publishing House 2002], designed for the treatment of domestic wastewater from suspended solids and activated sludge. It is a tank of circular shape in plan with a block located in the peripheral part of the block of radial shelf thin-layer elements to the entire depth for thin-layer sedimentation of contaminants during radial upward flow, a settling zone of great depth to thin-layer peripherally located elements, a bunker bottom for sediment, a feed means source wastewater to the entrance of the sump, devices for collecting and discharging purified water in the form of an annular drainage and drainage trough at the wall of the sump, about irayuschihsya on the radial supporting elements (beams) located at the bottom of the settler over the scraper for raking sludge.

The cleaned liquid (waste water) enters the settling zone, where the bulk of coarse suspended particles and activated sludge are released during a radial flow of liquid (in a layer equal to the depth of the settler), after which water with undeveloped fine particles of pollution enters the radial thin-layer elements of shallow depth, where smaller particles of contaminants fall out, forming a precipitate, and due to the inclination of thin-layer elements under the influence of gravity, they slide to the bottom of the sump, from where they are removed by scrapers into the pit, and then for further processing, and the purified liquid is collected by the drainage system (remote gutters, radial gutters and an annular drainage gutter) and is discharged from the structure.

Moreover, thin-layer elements operate in a radially ascending fluid flow, then the water purified in them enters through triangular unfilled spillways of remote ring and radial trays and is discharged from the installation.

The disadvantages of this design are:

1. The placement of thin-layer elements to the entire depth of the settling zone, not occupied by scrapers, and the lower part of the thin-layer elements adjacent to the settler wall practically does not work due to a change in the direction of flow in them from radial to ascending to the drainage channels, and the supporting structures of the outgoing drainage trays pass through a continuous ring block of thin-layer elements, which complicates their design and reduces the quality of water treatment.

2. To support the blocks of thin-layer elements, it is necessary to provide special, supporting structures of blocks of considerable length located above the scraper, embedded in the wall of the sump, which is not always possible during the reconstruction of existing structures and complicates the design of the scrapers due to the need to ensure rigidity and strength of their end parts, which are usually achieved by additional horizontal and inclined rods forming a scraper truss, which can also cause poor removal of sediment from iferiynoy bottom part of the settler by thin-layer elements, its decay and removal from the sump.

3. The hydraulic efficiency of thin-layer structural elements is achieved by increasing the material consumption (its volume). At the same time, a change in the direction of flow can be guaranteed to be ensured in an area not occupied by thin-layer elements with corresponding savings in material resources and a decrease in the total volume of the block.

4. Due to insufficient insulation of the upper parts of the blocks, it is possible to directly receive insufficiently purified liquid from the rest of the settling zone, bypassing the thin-layer elements, directly into the annular drainage tray through its face facing the center of the settler, which reduces the quality of cleaning due to insufficient insulation the specified catchment area and does not guarantee the movement of the entire treated volume of wastewater through blocks of thin-layer elements.

The objective of the claimed utility model is to achieve the following technical result: increasing the efficiency of wastewater treatment and purification with an increase in productivity due to a more optimal flow distribution between thin-layer elements.

The technical result is achieved in that the sump (installation) for wastewater treatment comprises a reservoir having means for supplying source water, with a coarse sedimentation zone (with a depth equal to the sedimentation depth) and zones of thin-layer sedimentation of shallow depth, equipped with radial-type segment blocks with thin-layer elements with upward flow located between radially mounted cantilever frames for fixing the position for collecting and discharging purified water, means of supply and flowing wastewater, which first moves radially through successively passes through the coarse cleaning zone, and then thin-layer sedimentation, which are made of each of four blocks, two of which are with shelves of flat shelves of the same size and two are installed left and right in the direction of movement of the water - shelves in the form of a trapezoid, the dimensions of which increase in proportion to their location in the block from the center of the sump. Thin-layer (segment) blocks are installed in the upper half of the water layer in the sump on supporting structures in the form of a strapping of cantilever frames fixed with special clamps to elements of cantilever frames supporting the drainage system, and the movement of the liquid to be cleaned is ensured only through thin-layer elements by installing an annular vertical inclined partitions and inclined horizontal partitions between segment blocks at the locations of inclined frame elements.

The essence of the utility model is illustrated by drawings, which depict:

figure 1 - Installation diagram (sump) in the context;

figure 2 - View of the installation (sump) from above;

figure 3 - Fragment of the zone of thin-layer sedimentation in the context;

4 is a diagram of a Central segment block;

5 is a diagram of the extreme blocks, the right (a) and left (b).

The wastewater treatment plant (settler) comprises a reservoir with a preliminary rough treatment zone (settling) located in it, means 2 for supplying the initial wastewater to the entrance to the settler, a remote ring drainage tray 3, radial drainage trays 4, a drainage and discharge ring chute 5, radially located cantilever supporting frames (trusses) 6, supporting drainage chutes, peripherally located between the frames segment zones 7 of wastewater treatment with thin-layer sedimentation, equipped with 8 thin-layer blocks of settling with an upward movement of the fluid flow, protective horizontal and inclined partitions 9 at the locations of the struts of the cantilever frames (shown by a dotted line), excluding the movement of water bypassing the blocks of thin-layer sedimentation, supporting elements for installing thin-layer blocks, consisting of a casing of the cantilever frame 10, supporting blocks 11 and mounting clamps 12, a protective vertical annular partition 13, which prevents the flow of untreated water into the zone of thin-layer sedimentation above the blocks of thin-layer elements, scrapers 14 for raking sludge in the pit, a conduit 15 for removal of sludge and purified water outlet 16.

The operation of the installation is as follows. The liquid to be cleaned is supplied to the center of the installation (settling tank) in the coarse cleaning (settling) zone 1, the contaminants are previously settled in the water layer equal to the depth of the settling tank on the path of radial movement of water from the means 2 for supplying the initial wastewater at the entrance to the settling tank to the after-treatment segment 7 equipped blocks of 8 shelf thin-layer elements, in which the settling process is completed, and the effective removal of the main part of finely divided suspended impurities and the smallest particles of activated sludge due to laminar characterization ktera flow and deposition of a layer of liquid of small depth (20-50 mm). The precipitate under the influence of gravity slides along the inclined surface of the thin-layer elements into the sedimentary zone, is transported by scrapers 14 to the pit together with the sediment from the coarse cleaning zone, and is removed through pipe 15 to remove the sediment.

The purified water is collected by an external drainage ring tray 3, radial trays 4 and a drainage-discharge ring chute 5 through triangular non-flooded spillways, and then is discharged from the installation (sump) through pipeline 16. From the primary pre-treatment zone 1, the water flows to the bottom for purification into thin-layer elements 8 with a reverse slope, changing the direction of its flow from radial to ascending in the free volume under the blocks, which improves the uniformity of the flow distribution in the input section of the blocks and the work t on-layer elements within blocks.

To exclude the possibility of water entering from the rough pre-treatment zone 1 directly into the purified water drainage system, bypassing the thin-layer sedimentation units 8, protective horizontally inclined partitions 9 are provided at the locations of the struts of the cantilever radial support frames (trusses) 6, separating the segmented treatment areas 7 and the continuous ring vertical partition 13, which prevents the passage of water above the zone of location of thin-layer blocks, which ensures reliable high quality wastewater treatment .

Claims (4)

1. Installation for wastewater treatment (sump), comprising a tank having means for supplying source water, with a coarse sedimentation zone and thin-layer sedimentation zones located therein, equipped with radial-type segment units with thin-layer elements, characterized in that the segment units are installed in upper half of the water layer. 2. Installation according to claim 1, characterized in that at least two of the segment blocks of the zone of thin layer sedimentation consist of shelves of the same size and at least two of shelves in the form of a trapezoid, the dimensions of which increase in proportion to their location in the block from the center of the sump . 3. Installation according to claim 1 or 2, characterized in that the segment blocks are mounted on supporting structures in the form of strapping cantilever frames supporting the drainage system. 4. Installation according to claim 3, characterized in that between the segmented blocks, at the locations of the inclined elements of the cantilever frames, inclined-horizontal partitions and an annular vertically-inclined partition are installed.