■ What is Pretreatment package with spiral flow grit remover

This pretreatment package is composed of mechanical fine screen, compactor, spiral flow grit remover and sand washing conveyor.

This package is installed at front stage of treatment plant, to remove big grit in the size of more than 3mm and to separate clean sand from raw water, letting light weight organic component pass it through to the next treatment stage. It has great advantage to reduce total load of treatment plant with more than 90% of sand removal efficiency.  

 

■ Feasible application

1. Total or partial package can be applied, depending on job site condition.

2. Waste water treatment plant

3. Sewage water treatment plant

4. Water treatment plant.

Mechanical process of Pretreatment

 

■ Principle of Pretreatment package with spiral flow grit remover

1. Installed at front part of treatment plant to screen fine grit that prevents pumps and piping from

    clogging.

2. Fine grit of raw water is separated by front screen.

3. Small grit passed through fine screen is divided into light organic component and heavy sand by

    spiral flow grit remover. Heavy sand settles down, light small organic component rises to the

    surface and passes through.

4. Settled heavy sand is lifted to the sand separator by air lift device.

5. Finally lifted sand is cleaned by grit washing separator, and discharged.

 

■ Schematic diagram

 

■ Advantage

1. Simple package with space saving

2. Efficient grit washing to get clean sand

3. Efficient sand lifting with tornado block

4. Simple installation

5. Easy maintenance

 

■ Air Lifting Pump®

- No more sand pump trouble

Sand pump has been quite often adopted to discharge settled sand from the grit chamber to the grit classifier. But high speed rotor in sand pump has been worn very excessive hardness of sand and finally the sand pump fails. Air lifting pump does not use any high speed rotating part to lift sand. It uses just air to lift settled sand from grit chamber. There is no wearing or clogging part inside of it.

- Efficient Air Lifting

TASET Air lifting pump® is specially designed by the computer simulation. When it is activated, it firstly breaks settled sand layer by air pulsing for efficient sand suction. And broken sand layer is very quickly lifted by air. Tornado block & twisted air nozzle provide increase suction pressure to lift heavy sand.

- Computer Simulation

For every grit chamber computerized analysis is inevitable to get the most efficient result. Computerized analysis will be provided to customize all grit chamber condition

 

0.1mm Sand Removal Efficiency 84.8%

0.2mm Sand Removal Efficiency 100%

      

 

1. Spiral Flow Grit

    Remover

Computerized analysis decides its size & impeller velocity. Every time customized analysis is provided to make best decision

2. Impeller®

Separation of heavy sand from light organic component takes place. It allows light organic material to pass it through. Only heavy sand is settled down by this impeller.

Tornado Block

3. Tornado Block®

Increase suction pressure for the lifting of settled sand to the sand classifier

4. Twisted Air Nozzle®

Specially designed twisted air nozzle increases air lifting pump efficiency.

5. Grit Classifier

Shaftless screw conveyor makes discharged sand clean coming from grit remover. It has lamellar system inside to help sand cleaning.

6.  Fine Screen

Screening large grit bigger 3mm in size.

Screened large grit is discharged by conveyor

7. Air Lifting Pump®

Discharge settled sand to the sand classifier with high efficiency.