RU1780804C - Settler with filtration system - Google Patents

Abstract

SUMMARY OF THE INVENTION: The sump consists of a cylindrical body, a conical bottom, a central pipe with a bell supplying pipe feed water, a sludge drain pipe, a radially located truss with an electric motor, a clarified water drain tray and filter cloth. The concentric siphon located on the farm has a suction pipe with a slotted slot and a drain pipe. The regeneration of the filter cloth overlapping the slit slot on the side surface of the cylindrical tank of the sump is carried out by washing it with clarified water and then removing the wash water, which increases the degree of purification by improving the conditions for the regeneration of the filter cloth. 1 s.p. 4-ill. (L C

Description

The invention relates to a device for the purification of wastewater and the discharge of thickeners / after settling or thickening, of suspended solids by filtration through a filter cloth, and can be used to clean industrial wastewater of galvanic shops, reinforced concrete structures, draining thickeners of concentration plants and other industries.

Filtration tank is known for the treatment of industrial wastewater.

In the filter screen apparatus, filter nozzles with stop valves are arranged on an inner side wall that is common to the aeration and settling zones. The filter nozzles operate alternately in the filtering and regeneration mode with compressed air, due to the switching of valves.

This design necessitates the continuous operation of the blower to regenerate the filter nozzles with frequent switching of the shutoff valves.

A known wastewater treatment plant, comprising a pump with a rotating filter mounted on the suction line, the nozzle located in the settling chamber installed parallel to the filter and made in the form of a hollow pipe with tangential channels. The internal cavity of the filter housing is in fluid communication with the wastewater recirculation pipeline.

In the prototype and the proposed device, in contrast to the known device, the pump and filter rotation are not used,

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which does not lead to additional energy costs.

The closest to the invention in terms of technical nature and the achieved result is a radial thickener comprising a cylindrical body, a conical bottom with a sediment removal pipe, a pipe; feed water supply, a radially located farm with an electric motor, a clarified water discharge tray and a filter element. Three groups of brushes are provided for cleaning the filter baffles from solid particles.

The disadvantage of the above device is that particles clogging the pores of the filter cloth, having a relatively small hydraulic particle size, will again clog the filter cloth under the influence of the speed of fluid flow through the filter cloth of about 10-15 m / h after the brushes pass removed from the filter baffle system. In addition, the brushes can contribute to the lubrication of the pores of the filtercot, which will cause an increase in hydraulic losses and can put the system of filtering baffles out of operation.

The aim of the invention is to increase the stability and efficiency of a sump or thickener.

This goal is achieved by the fact that in a device including a cylindrical body, a conical bottom with a drainage pipe, a central pipe with a bell, a baffle plate, a pipe supplying source water, a radially located farm with an electric motor, a tray for bleeding water discharge vi a filter element on the side surface in the upper part of the cylindrical tank of the sump, along its perimeter there is a slotted slot with a grill, on the inside of the housing the slotted slot is covered with filter cloth, and with the outer tray clarified water, while a concentric siphon is placed above the upper edge of the cylindrical tank of the sump on a radially located farm with an electric motor, the lower part of the suction pipe which is parallel to the filter fabric with a gap to it, a slit is made on the side surface of the suction pipe, and the lower end of the pipe is muffled, the lower part of the outlet pipe of the concentric siphon is placed inside the wash water drain tray, in addition, vertically inside the drain trays of clarified and wash water has no nozzles, the nozzle discharge edge of the wash water is disposed below the edges

clarified water discharge pipes, and the difference in their marks exceeds the sum of hydraulic losses from the water inlet into the slotted slot of the suction pipe to its exit

from a branch pipe,

To reduce the consumption of purified water for washing the filter cloth, with periodic washing, the portion of the filter cloth is covered with a waterproof

elastic material and due to the lattice this section is made with a deflection in the direction of the slotted slot on the suction pipe of a concentric siphon.

In FIG. 1 shows a sump with a filtration system, section; in FIG. 2 something

- same plan view; in FIG. 3 - node work concentric siphon; in FIG. 4 is a view A in FIG. 3.

Sump with filtration system

consists of a cylindrical body 1 and a conical bottom 2 with a sediment discharge pipe 3, having a valve 4, a central pipe 5 with a bell 6, a breaker shield 7, a pipe supplying source water 8, a radially located farm 9 with an electric motor 10, a clarified water discharge tray 11 filter cloth 12.

In the upper part of the cylindrical body 1 along its perimeter is made a slit

a slot which is blocked by a metal rod grill 13 and a filter cloth 12. On the outside of the slit, the slot is blocked by a clarified water discharge tray 11.

Pipes 14 are vertically located inside the clarified water drainage tray 11, the upper ends of which are open, and the lower parts are brought out of the tray 11 and cut into the collector 15c by a discharge pipe 16. An electric motor 10 is placed on the central pipe 5, connected to a radially located truss 9. Peripheral part of the truss 9 through the roller 17 is supported on board a cylindrical housing 1, on which

Concentric siphon 18 is located.

The concentric siphon 18 consists of a cylindrical body 19, bounded above by a plug 20, and from below by a cone 21. A nozzle 22 for charging is cut into the plug 20

a siphon with a valve 23 and a pipe 24 for discharging air with a valve 25. A suction pipe 26 is placed coaxially with the cylindrical body 19, the upper edge of which is open and the lower part is led out

through the lateral surface of the cone 21 beyond and is equipped with a valve 27.

On the side surface of the suction pipe 26, parallel to the filter fabric 12, with a gap to it,

made a slit slot 28. The lower end of the suction pipe has a cap 29.

An outlet pipe 30 with a valve 31 is connected to the lower part of the housing 21. The open end of the outlet pipe 30 is located inside the wash water drain tray 32, inside of which a pipe 33 for washing water discharge is vertically located. ..

Moreover, the mark of the open end of the pipe 33 of the wash water outlet is located below the marks of the open ends of the pipe 14 of the drain of clarified water.

The marks of the ends of the nozzles 14 above the upper edge of the slotted slot 28 of the suction pipe 26.

In a relatively small area of the filter cloth 12, of the order of three to five diameters of the suction pipe 26, a waterproof elastic material 34 (for example, polyethylene) is fixed, curved by the grating 13 towards the slotted slot 28 and having a minimum clearance between the grating 13 and the slotted slot 28.

The sump with a filtration system operates as follows. The liquid enters the sump through a pipe supplying the source water 8.

- After passing through the central pipe 5 with the bell 6, the liquid, due to the reflective shield 7, is distributed in the horizontal plane of the cylindrical tank 1 of the sump. Suspended substances, due to the difference in vertical velocities with water, are deposited in the conical bottom 2. With the open valve 4 on sludge discharge pipe 3, the sludge from the sump is periodically removed.

Water from the sedimentation zone with a residual suspended matter content, due to the difference in the liquid level marks in the cylindrical tank 1 of the sump and in the drainage tray of clarified water 11, passes through the filter cloth 12. During filtration, the water is further treated after settling.

From the clarified water drainage tray 11, liquid is poured through the edges of the nozzles 14 and enters the collector 15, from where it is discharged by the pipe 16. In this case, vertically located nozzles 14 fix a constant water level in the drainage tray of clarified water 11.

The pores of the filter cloth 12 are clogged with suspended solids and increase hydraulic pressure loss. The increase in pressure losses increases the water level in the cylindrical housing 1 of the sump.

Upon reaching a critical level of water in the settling zone, the filter

tissue 12 should be brought into regeneration mode. With large quantities of suspended solids in the water after settling, the filter cloth 12 should be 5 under constant washing.

In the inventive apparatus for regenerating the filter cloth 12, a concentric siphon 18 is used.

The concentric siphon 18 must be charged before starting work and periodically during operation. The frequency of the siphon charge during operation will be determined by the gas content c. water after settling.

5 The charging of a concentric siphon 18 is carried out as follows. With closed valves 27 and 31 on the suction and discharge pipes 26 and 30, open valves 23 and 25, the concentric siphon 18 is filled through the pipe 22 with water. As the siphon 18 is filled with water through the nozzle 24, air will be forced out. After filling the concentric siphon 18 with water, the valves 23 and 25 are closed.

5 The concentric siphon is installed so that the slotted slot 28 on the suction pipe 26 is located on the portion of the filter cloth 12, covered by a waterproof elastic material 34. Moreover, the waterproof, elastic material, due to the grating 13, has a deflection towards the slotted slot 28 on the suction pipe 26 and forms a minimum clearance with it. After opening the gate 5, 27 and 31 on the suction pipe 26 and

outlet pipe 30, due to the difference in marks

-level of water in the drainage tray clarified

water 11 and the water level in the drain pan by flushing water 32, in a concentric siphon

0 18 a vacuum forms.

Under the influence of rarefaction, the waterproof material 34 is sucked into the slotted slot 28 and overlaps it, preventing the operation of the concentric siphon

5 18.

To bring the filter cloth into regeneration mode, an electric motor 10 is activated, which drives a radially located truss 9 with a concentric siphon 18 mounted on it. Together with the concentric siphon 18, the suction pipe 26 with a slotted slot 28 starts to move. Since the filter cloth 12 is in vertical 5 direction is fixed freely and corresponds to the size of a waterproof, elastic material 34, then as the suction pipe 26 moves into the slot 26, the filter cloth 12 is sucked in, moving Referring the lattice 13.

When the suction pipe 26 moves, the edges of the slotted slot 28 slide along the filter fabric 12. To reduce the friction coefficient between the edges of the slotted slot 28 and the filter fabric 12, a lower part of the suction pipe 26 made of steel can be pressed into a polyethylene pipe with a corresponding slotted slot .

Thus, from the clarified water drainage tray 11, the purified water is sucked through the filter cloth 12 into the slotted slot 28 and washes the pores of the filter cloth 12 from pollution. Contaminated wash water passes through a concentric siphon 18 and flows through the drain pipe 30 to the wash water drain tray 32 and, overflowing over the edges of the nozzle 33, is removed.

During operation of the concentric siphon 18, under the influence of rarefaction, air will be released from the wash water and, accumulating in its upper part, will lower the water level in it. Upon reaching a critical water level in the concentric siphon 18, it is necessary to charge it.

When the filter cloth 12 is periodically washed, a concentric siphon 18 can be automatically activated depending on the level of the liquid in the cylindrical tank 1 of the sump.

Thus, the claimed design of a settling tank with a filtration system has the following technical and economic advantages in comparison with the known structures and prototype:

allows to ensure uniform collection of clarified water from the settling zone of the sump into the clarified water drain tray, due to the flow of water through a filter cloth that overlaps the slit slot on the side surface of the cylindrical tank of the settler, improved tissue regeneration and a constant liquid level in the clarified water drain tray, thanks to a vertically arranged nozzle, which helps to improve the hydrodynamic conditions for the deposition of suspended solids in the settling zone;

allows regeneration of the filter cloth by the reverse flow of purified water from the clarified water drainage tray by suction of the filter cloth into the slotted slot from the side of the released contaminants on the surface of the filter cloth, thereby creating stable operating conditions for the filter system and the sump;

it allows the concentric siphon to be taken out of operation without shutoff valves and to ensure that the filter cloth is sucked into the slotted slot at the beginning of the washing device due to a section blocked by a waterproof, elastic material having a deflection towards the slotted slot on the suction pipe, which reduces the consumption of purified water for regeneration filter cloth and improves the operating conditions for servicing the device;

It allows to remove the contaminants released on the filter cloth from the sump, due to the difference in the level marks of the liquid in the drainage trays of clarified and wash water, which helps to increase the filter cycle.

Claims (2)

1. A sump with a filtration system, including a cylindrical body with a conical bottom, feeding and unloading devices, a radially located truss with an electric motor, a tray for bleeding clarified water and a filtering partition in the form of a filter cloth, characterized in that, in order to increase the stability and efficiency of the sump by improving the conditions of regeneration of the filtering fabric, the housing in the upper part around the perimeter is made with a slotted slot and provided with a grill; on the inside of the housing, the slot is overlapped and a filtering cloth, and on the outside of the casing, a clarified water drainage tray is placed, the sump is equipped with a washwater drainage tray located coaxially outside the clarified water drainage tray, and a concentric siphon installed on the farm, the lower part of the suction pipe of which is parallel to the filter cloth with a gap to it and is made with a slotted slot on the lateral surface, and the lower end of the pipe is plugged, the lower part of the siphon outlet pipe is located inside the wash water drain tray, the drain trays universe and are provided with vertical scrubbing water diverting nozzles, wherein the upper edge of the wash water outlet pipe located below the upper edge of the nozzle discharge clarified water and the supply device is a supply pipe, communicating with the central pipe with the pipe and the baffle board. 2. The sump according to claim 1, characterized in that, in order to reduce the consumption of purified water for washing the filter cloth, the filter cloth section is provided with a waterproof elastic material 9178080410 scrap and made with a deflection in the direction of the slit, howl slot on the suction pipe of the siphon. - .t.,  NSa g /