Process Description

The system is designed for high throughput, operational stability, and high automation - capable of unattended operation. Key features include:

• High processing capacity (3 x that of conventional equipment)

• Automated control for reliable operation

• Water recirculation from thickening and pressing stages

• Low capital and operating costs

• Adaptability to diverse river sludge types

Step-by-Step Process

1. Receiving and Storage - Sludge is delivered by tanker or conveyor to a receiving tank.
2. Dilution and Homogenization - High-pressure water flushes sludge into a dilution tank and then a buffer tank to stabilize solids concentration. Coarse screens remove large particles.
3. Grit and Debris Removal - A waste sorting machine removes particles >3 mm. Sand-laden sludge is then directed to a grit removal system.
4. First Flocculation - Sludge enters a flocculation tank with a small dose of chemical conditioner.
5. Thickening - Flocculated sludge passes through a belt thickener, reducing water content to approximately 75% solids.
6. Second Flocculation - Thickened sludge is mixed with a micro-dose of polymer solution before entering the main dewatering unit.
7. High-Pressure Dewatering - A high-pressure belt press using felt-type filter technology reduces sludge water content to 30-60%.
8. Disposal or Reuse - The dewatered cake is suitable for transport and final disposal or beneficial reuse.

Key Equipment and Operating Principles

1. Waste Sorting Machine

Removes solid particles in the 3-30 mm range. Features a simple structure, high throughput, and rapid water drainage.

2. Belt Thickener

Uses imported double-layer felt-type filter fabric to reduce sludge to ~75% solids while minimizing polymer consumption. High dewatering efficiency.

3. High-Pressure Belt Press

The final dewatering stage achieves 30–60% solids content. Offers high cake solids and large processing capacity.

4. On-Site Installations

Field installations demonstrate reliable performance across various river conditions, producing stable, transportable filter cakes.