RU2257939C1 - Device for sewage clarification and dehydration of slime - Google Patents

Abstract

FIELD: production of devices for sewage clarification.

SUBSTANCE: the invention is pertaining to production of devices for sewage clarification and may be used for clarification of sewage from coarsely dispersed impurities in a centrifugal field and simultaneous dehydration of the formed slime. The device contains a pressure hydrocyclone and a nutsch filter mounted in its lower part. In the lower part of the device they provide for installation of an ejector creating rarefaction in the body of the nutsch filter due to a residual pressure after a pressure hydrocyclone in the pipeline of the clarified sewage. In the body of the nutsch filter there are a perforated conical bottom and a filtration element. The technical result is intensification of processes of dehydration of a slime at a sewage clarification in pressure hydrocyclones.

EFFECT: the invention ensures intensification of processes of dehydration of a slime at a sewage clarification in pressure hydrocyclones.

1 dwg

Description

The invention relates to structures for wastewater treatment and can be used to clarify wastewater from coarse impurities in a centrifugal field and at the same time dehydrate the resulting sludge.

A known surface wastewater treatment plant containing a pressure hydrocyclone and a suction filter, a filtrate discharge pipe and a pump for discharging dehydrated sludge (RU 2205924, class C 02 F 1/00, 2003).

A disadvantage of the known device is the presence of a drainage pipe for the filtrate and a pump for unloading the dehydrated sludge.

The technical problem to which the invention is directed is the intensification of sludge dehydration processes during wastewater treatment in pressure hydrocyclones.

This problem is solved by the fact that in order to dehydrate the formed sludge in the lower part of the device for clarifying wastewater and dewatering the sludge, a nutc filter is installed with an ejector that creates a vacuum in the body of the nutc filter due to the residual pressure after the pressure hydrocyclone in the clarified sewage pipeline.

The invention is illustrated in the drawing, which shows a General view of a device for wastewater treatment and dewatering of sludge.

The positions in the drawing indicate:

1. sewage supply pipeline;

2. pressure hydrocyclone;

3. sprinkler;

4. filter element;

5. perforated conical bottom;

6. ejector;

7. The pipeline of clarified wastewater;

8. pipeline for the removal of dehydrated sludge;

9. Nutsche filter housing;

10. The pipeline for the removal of clarified wastewater and filtrate;

11. slurry nozzles;

12. locking device.

A device for wastewater clarification and sludge dewatering consists of a sewage supply pipe 1, a pressure hydrocyclone 2, a sprayer 3, a perforated conical bottom 5 with a filter element 4, an ejector 6, a clarified sewage pipe 7, a dehydrated sludge removal pipe 8, a suction casing filter 9, a clarified sewage removal pipeline, and a filtrate 10.

An example of a device for clarifying wastewater and dewatering sludge.

Polluted wastewater is pressurized tangentially through the wastewater supply pipe 1 to the pressure hydrocyclone body 2, where centrifugal forces separate the solid fraction from the wastewater. The resulting sludge through the sludge nozzle 11 enters the sprayer 3, with which the sludge is evenly distributed over the area of the filter element 4, made, for example, of fine mesh or synthetic fabric. The treated wastewater under residual pressure is fed through the clarified wastewater 7 pipeline to an ejector 6, due to which a vacuum is created in the case of the suction filter 9 and due to this, the liquid is separated from the sludge detained on the filter element 4 and removed through a perforated conical bottom 5 capacity of the case of the suction filter 9. Next, the filtrate is removed from the capacity of the body of the suction filter 9 using an ejector 6 through the clarified sewage removal pipeline and the filtrate 10. As the sludge accumulates on the filter element 4 closes the shut-off device 12 on the clarified sewage and filtrate removal pipeline 10, as a result of which a pressure is created in the device equal to the pressure on the wastewater supply pipeline 1. When the dehydrated sludge 8 of the shut-off device 12 is opened on the pipeline, the delayed slurry is squeezed out by wastewater with the surface of the filter element 4 and is removed outside the device through the pipeline to remove dehydrated sludge 8.

Claims (1)

A device for clarifying wastewater and dewatering sludge, comprising a pressure hydrocyclone and a suction filter housing installed in the lower part, pipelines for removing dehydrated sludge and clarified wastewater, characterized in that it is equipped with an ejector installed in the lower part with pressure supply and discharge pipelines of clarified sewage water, creating a vacuum in the case of the suction filter due to the residual pressure after the pressure hydrocyclone in the pipeline of clarified wastewater, while in the case of the suction filter The perforated conical bottom and the filter element located on it are installed, and the hydrocyclone is equipped with a sprinkler.