Reaction Clarifier, Description

Reaction Clarifier
Description

"PARAMOUNT" make sludge blanket type clarifier mechanism is suitable for installation in RCC/steel tank. The tank is generally provided with bottom slope of 1:12. The unit provide mixing, internal recirculation, flocculation, settling, clarification, positive sludge thickening and removal within a single basin.

Flow Sequence

In the recirculation drum, initial mixing and reaction takes place in the presence of previously formed floc. The chemicals and recirculated sludge are thoroughly mixed with the raw water by large volume turnover accomplished by the turbine. Further mixing and contact takes place in the secondary reaction zone within the reaction well cone, where flocculation is carried to completion in the presence of large quantities of recirculating floc and solids. This treatment ensures thorough chemical mixing and complete floc and precipitate development.

The percentage of solids in the slurry pool within the reaction well may be varied by adjustment of the rotational speed of the turbine and by regulation of the depth and concentration of sludge in the bottom.

From the bottom of the reaction well, the flocculated water flows outward and upward where separation of the floc and water takes place in the outer sedimentation zone. The velocity of the upward flowing clarified water continually diminishes as it rises to discharge into the launder system at the water surface.

Mechanism

The Mechanism generally consists of the following :

Proprietary sludge rake driving mechanism fully enclosed in M.S. housing with all gears and bearings in an oil bath with proper seal between fixed and rotating parts and with adjustable overload control and load indicator, driving motor, gear box etc.

A similar drive mechanism for turbine with fully enclosed gears and bearings but without overload control and load indicator.

Turbine with recirculation drum, baffles and supports. The turbine operate at a low tip speed to prevent excessive agitation and floc break up.

Full/Half diameter bridge provided with walkway and steel angle/G.I. pipe hand rails extending to an operating platform at the centre. The operating platform provides level walkway and clearance around the drive head.

Driving shaft / cage, rake arms with scrapper blades and brass/rubber squeezes.

Conical reaction chamber supported from the super structure.

Inlet pipe positioned underwater and supported from super structure / reaction chamber.

Clarified effluent is discharged through peripheral launder via. either a submerged weir effluent collecting launder or radial launders with wall brackets or by pipe. The outlet launder will serve to discharge the flow.

One set of sampling pipe arrangement, to collect the sample from different levels.

10.

All parts are suitably cleaned before painting. Above water parts are provided with one coat of red oxide primer. Under water parts are provided with epoxy painting.

Exclusions :-

All civil works, electrical works, erection & commissioning of the mechanism & any other item not specifically mentioned in our proposal.

Access ladders/staircase to the bridge, stainless steel hardware, rubberlined/stainless steel underwater parts can also be provided on request.

Reaction Clarifier Description

Reaction Clarifier
Description