CN101991977A

CN101991977A - Grit chamber device

Info

Publication number: CN101991977A
Application number: CN2009100135258A
Authority: CN
Inventors: 何建祺
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-28
Filing date: 2009-08-28
Publication date: 2011-03-30

Abstract

The invention discloses a grit chamber device, which belongs to the technical field of environmental protection and relates to a silt sedimentation technique in hydraulic engineering. The invention provides a clock-type grit chamber, which can solve the problem of silt sedimentation in the conventional river channel well. In the grit chamber device, the flow velocity and the flow state of the intake water flow are controlled, so that sand particles are accelerated to be sedimented spirally along the wall of the grit chamber under the action of a centrifugal force and gravity; organic matters drift away along with the water flow under the action of the water flow; the sand sunk to the bottom of the grit chamber is lifted by air; and the sand and a little sewage enter a sand-water separator to be separated and discharged; and cleaning water reflows to a grating well, so that the aim of removing sand is fulfilled.

Description

A kind of setting pot device

Technical field:

The invention belongs to environmental technology field, relate to the sediment deposition technology in the hydraulic engineering

Background technology:

Setting pot generally is provided in a side of the facility of the mud-water separation before the biochemical structures of sewage treatment plant.The deposit that separates mostly is the bigger sand of particle, and deposit proportion is bigger, the inorganic constituents height, and water content is low.Sewage is moving, is flowing and compiling in the process and unavoidably can sneak into silt particle.If the sand in the sewage not sedimentation separation is in advance removed, then can influence the operation of subsequent processing device.Most importantly wear and tear pump, stop up pipe network, disturb even destroy the biochemical processing process process.

Sedimentation basin generally is before biochemical or the structures of biochemical back mud-water separation, mostly is the thinner mud of separating particles.Be called preliminary sedimentation tank before biochemistry, the mud of precipitation is inorganic to be called morely, and moisture percentage in sewage sludge is low with respect to second pond mud.Be positioned at biochemical sedimentation basin afterwards and be commonly referred to as second pond, mostly be organic sludge, moisture percentage in sewage sludge is higher.

Sewage is moving, is flowing and compiling in the process and unavoidably can sneak into silt particle.If the sand in the sewage not sedimentation separation is in advance removed, then can influence the operation of subsequent processing device.Most importantly wear and tear pump, stop up pipe network, disturb even destroy the biochemical processing process process.Setting pot mainly contains horizontal-flow grit chamber, aerated grit chamber, rotational flow grit chamber etc.Modern designs mainly contain rotational flow grit chamber.

Summary of the invention:

The present invention is exactly at the problems referred to above, and a kind of clock-type setting pot is provided, can reasonable solution existing waterway in silt alluvial problem.

For achieving the above object, the present invention adopts the flow velocity and the fluidised form of control ingoing stream, make the sand particle under the effect of centrifugal force and gravity, along pool wall line acceleration sedimentation in the shape of a spiral, organic matter floats with current under the effect of current simultaneously, sink to sand at the bottom of the pond behind air-lift unit, enter with a small amount of sewage and to separate the back in the grit water separator and discharge, rinse water is back to grille well, thereby reaches the purpose of desanding.

Beneficial effect of the present invention:

Floor space of the present invention is little, the sand setting effect is subjected to water yield variable effect very little, sewage tangentially enters from setting pot, has certain flow velocity, thereby sand grains is produced centrifugal force, make the heavier grains of sand, be deposited to sand catcher at the bottom of the pond along pool wall and setting pot particular structure, prevent that simultaneously the tiny grains of sand from sinking, isolated sand moisture content hangs down rate, content of organics is few, is convenient to transportation; Air-lift unit system by the advanced person directly is transported to the sand setting grain in the grit water separator equipment for the discharge of sand setting provides good condition, realizes thoroughly separating of sand grains and sewage.System adopts PLC to control washed-out sand, sediment outflow cycle automatically, security of operation, reliable; Easy to operate, safeguard that simply the life-span is long;

The specific embodiment:

Clock-type sand setting equipment is to utilize mechanical force control fluidised form and flow velocity, quickens the precipitation of sand grains, and organic matter is taken away with current.

Irrigation channel flow velocity: 0.6-0.9m/s

Waterpower surface loading: 200m3/m2d

The time of staying: 20-30s

Sewage tangentially enters from setting pot, has certain flow velocity, utilize motor and transmission device drive rotating disk and ramp type blade to be rotated under the action of centrifugal force, sand grains is produced centrifugal force, make the heavier grains of sand be thrown toward pool wall, fall into sand hopper, prevent that simultaneously the tiny grains of sand from sinking, organic matter then is left in the sewage.

Adjust rotating speed, the air-lift unit system by the advanced person directly is transported to the sand setting grain in the grit water separator equipment for the discharge of sand setting provides good condition, realizes thoroughly separating of sand grains and sewage.

Claims

1. a setting pot device is characterized in that adopting flow velocity and the fluidised form of controlling ingoing stream, makes the sand particle under the effect of centrifugal force and gravity, along pool wall line acceleration sedimentation in the shape of a spiral;

2. a kind of setting pot according to claim 1, it is characterized in that organic matter in the sewage is under the effect of current, float with current, sink to sand at the bottom of the pond behind air-lift unit, enter with a small amount of sewage and to separate the back in the grit water separator and discharge, rinse water is back to grille well, thereby reaches the purpose of desanding;

3. a kind of setting pot according to claim 1 is characterized in that controlling irrigation channel flow velocity: 0.6-0.9m/s; Waterpower surface loading: 200m3/m2d; The time of staying: 20-30s.