RU179679U1 - CENTRIFUGAL FILTRATION INSTALLATION - Google Patents

Abstract

The utility model relates to a device for treating industrial wastewater from suspended pollutants and can be used in engineering, construction industry, and mining enterprises. The centrifugal filtration unit contains a cylindrical housing 1, in which an annular partition 14 is coaxially located with the formation of external and internal cavities with nozzles for discharging sludge 8 and purified water 13, respectively, a conical filter mesh 2, which is installed from the bottom of the building the mustache 1 to the upper edge of the annular partition 14, and the inner shaft 5, which is a nozzle for supplying contaminated water to the installation and is hollow with blades 7 and windows “K” between them to supply this water for cleaning into the cavity bounded by the filter screen 2, and on which the outer shaft 9 is fixed with scraper blades 4, equidistant to the filter screen 2, and the shafts 5 and 9 are made with the possibility of unidirectional rotation at different speeds using pulleys 11 and 10 from an external drive. The scraper blades 4 are made equidistant to the filter net 2 and have brushes 3 along the outer rib. These scraper blades 4 can be made in the form of a spiral screw, and the spiral can be single or multiple starting depending on the size of the installation. The centrifugal filtration unit combines several processes - centrifugal separation, filtration and continuous regeneration of the filter element. Thus, the use of the proposed centrifugal filtration unit allows to increase the cleaning efficiency due to the continuous regeneration of the filter element and increase the productivity of the process. 2 s.p. f-ly, 3 ill.

Description

The proposed utility model relates to devices for treating industrial wastewater from suspended pollutants and may find application in engineering, construction, and mining enterprises.

Known filters for the treatment of wastewater from suspended solids using filter baffles, for example a drum vacuum filter with a descending cloth. (AE Timonin, “Environmental Engineering Handbook.” Vol. 2. Kaluga, 2003. Fig. 1.36. P. 434 ed. N. Bochkareva). Such devices have a complex structure and require careful sealing to create the necessary pressure difference on both sides of the filter cloth.

A known centrifuge (patent No. 2252823, B04B 3/00, publ. 27.05.2005). The invention relates to devices for separating heterogeneous liquid systems in the field of centrifugal forces and can be used in various industries. The centrifuge includes a housing with a filtering rotor installed in it, a drive, nozzles for supplying a suspension, washing liquid and coolant, solid and liquid phase receivers, a deflector located above the nozzle for draining the liquid phase, and circular plates with arc slots mounted obliquely on the inner wall liquid phase receiver. These devices are taken by us as a prototype.

In a known installation, the filter element is quickly clogged with sludge and must be periodically regenerated, stopping the cleaning process, which reduces the performance of the cleaning process, in addition, due to the very small centrifugal force of rotation of the entire mass of liquid, and, accordingly, the small driving force of the filtration on the grid due to a small pressure drop, the rotation of the rotor involves only the wall layers of the fluid in the rotational movement. All this makes the installation insufficiently effective in water treatment.

The technical result, which is achieved by the claimed utility model, is to increase the cleaning efficiency due to the continuous regeneration of the filter element and increase the cleaning performance.

The technical result is achieved by the fact that in a centrifugal filtration installation containing a cylindrical body in which an annular partition is coaxially located with the formation of an external and internal cavity with nozzles for draining sludge and purified water, respectively, a conical filter screen and an internal shaft are new that the inner shaft, which is the nozzle for supplying contaminated water to the installation, is hollow with blades and windows between them for supplying this water for cleaning to a cavity limited by a filter oval mesh, and on which the outer shaft is fixed with scraper blades, equidistant to the filter mesh, and the shafts are made with the possibility of unidirectional rotation with different speeds.

Scraper blades are made equidistant filter mesh and have brushes along the outer edge.

Scraper blades can be made in the form of a spiral screw.

The essence of the utility model is shown in FIG. 1 - FIG. 3 where

FIG. 1 is a diagram of a centrifugal filtration plant;

FIG. 2 is a cross-sectional diagram of a centrifugal filtration device;

FIG. 3 is a stereometric image of the device,

where 1 is a cylindrical body with a vertical axis;

2 - filter mesh;

3 - brushes;

4 - scraper blades;

5 - an internal shaft;

6, 12 - nodes of rotation;

7 - blades;

8 - pipe discharge sludge;

9 - outer shaft;

10, 11 - pulleys;

13 - pipe for removal of purified water;

14 - an annular partition.

The centrifugal filtration unit contains a cylindrical body 1, in which an annular partition 14 is coaxially located with the formation of an external and internal cavity with nozzles for removing sludge 8 and purified water 13, respectively, a conical filter mesh 2, which is installed from the bottom of the housing 1 to the upper edge of the annular partitions 14, and the inner shaft 5, which is a nozzle for supplying contaminated water to the installation and is hollow with blades 7 and windows "K" between them to supply this water for cleaning in strips b, limited by the filter mesh 2, and on which the outer shaft 9 is fixed with scraper blades 4, equidistant to the filter mesh 2, and the shafts 5 and 9 are made with the possibility of unidirectional rotation with different speeds using pulleys 11 and 10 from an external drive (in the figures not shown).

The scraper blades 4 are made equidistant to the filter net 2 and have brushes 3 along the outer rib. The scraper blades 4 can be made in the form of a spiral screw, while the spiral can be single or multiple starting depending on the size of the installation.

Centrifugal filtration unit operates as follows. The source of contaminated water is supplied into the cavity of the inner shaft 5. The inner shaft 5 through the pulley 11 from an external source (not shown) begins to rotate. Water from the cavity of the shaft 5 flows through the window "K" and from the rotation of the blades 7 acquires rotational motion. A pressure differential is created on the filter screen 2, through which the water is filtered, and the purified water is discharged through the pipe 13. Suspended substances are retained on the filter screen 2. This slurry layer must be continuously removed. Removing sludge from the surface of the mesh 2 is performed by rotating the outer shaft 9 from the pulley 10 from an external source (not shown). When the outer shaft 9 rotates, the scraper blades 4 begin to rotate, and the brushes 3 scrap off a layer of sludge deposited on the grid 2. This slurry moves to the upper part of the conical filter screen 2 and is discharged into the annular cavity between the housing 1 and the partition 14, from where it is discharged through the pipe 8.

The inner shaft 5 and the outer shaft 9 are rotatable at different speeds, therefore the device is equipped with two different pulleys 10 and 11. To intensify the process of separation of pollutants, an increase in centrifugal force is required, which is ensured by intensive rotation of the rotor shaft 5, and to remove sludge from the surface filter mesh 2 does not require more than the rotation speed of the scraper blades 4, which reduces the wear of the brushes 3 and increases their durability.

Thus, the use of the proposed centrifugal filtration unit allows to increase the cleaning efficiency due to the continuous regeneration of the filter element and increase the productivity of the process.

Claims (3)

1. A centrifugal filtration installation comprising a cylindrical body in which an annular partition is located to form external and internal cavities with nozzles for discharging sludge and purified water, respectively, a conical filter screen and an inner shaft, characterized in that the inner shaft, which is the source inlet contaminated water into the installation, made hollow with blades and windows between them for supplying this water for treatment to a cavity bounded by a filter screen, and on which external th shaft with scraper blades equidistant to the filter screen, the shafts being rotatable at different speeds. 2. The centrifugal filtration plant according to claim 1, characterized in that the scraper blades on the outer rib have brushes. 3. The centrifugal filtration plant according to claim 1, characterized in that the scraper blades are made in the form of a spiral screw.

Images