1. The sludge in the sludge tank is transported to the metering tank through the sludge transfer pump, and the amount of sludge is adjusted by adjusting the liquid level adjustment tube in the metering tank, and the excess sludge is returned to the sludge tank through the return pipe.

2. Sludge and flocculant are fully mixed in the flocculation mixing tank by a mixer to form alum

3. Alum flowers are concentrated by gravity in the concentration section, and a large amount of filtrate is discharged from the filter slits in the concentration section.

4. The concentrated sludge continues to advance along the direction of rotation of the screw shaft, and is fully dehydrated under the action of the internal pressure formed by the back pressure plate.

5. The dehydrated mud cake is discharged from the gap formed by the back pressure plate and the spiral body. The sludge treatment volume and mud cake moisture content can be adjusted by adjusting the rotation speed of the screw shaft and the gap of the back pressure plate. A

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