Application of Vacuum Screw Dryer in Wastewater And Sludge Treatment

In the field of sewage and sludge treatment, there are many types of evaporative drying equipment available on the market, including various evaporators and drum scraper dryers for wastewater treatment, as well as paddle dryers and plate and frame filter presses for sludge treatment. However, compared with these traditional equipment, our vacuum screw dryer currently has a relatively low market share and a high initial investment cost. So, under what circumstances will choosing our vacuum screw dryer become a more competitive solution?

1. Treatment of wastewater containing hazardous substances

When wastewater contains toxic, harmful or hazardous substances, traditional drying equipment may find it difficult to effectively suppress the release of these substances. The vacuum screw dryer can achieve evaporative drying at a lower temperature (about 30℃~40℃) under a vacuum environment, thereby maintaining the chemical stability of the material and preventing the volatilization of hazardous substances. This treatment method can quickly convert liquid wastewater into dry powdered solids, effectively reducing the risk of pollution and reducing the difficulty of subsequent treatment.

2. Solvent recovery and reuse

In some wastewater treatment scenarios, solvents may be important resources with recovery value. Traditional drying equipment often has difficulty in efficiently recovering solvents, while vacuum screw dryers can significantly improve solvent recovery rates through low-temperature evaporation and vacuum condensation. This advantage not only reduces solvent loss, but also improves overall economic benefits, and is particularly applicable to treatment projects with high solvent recovery requirements.

3. Treatment of heat-sensitive materials

For materials with strong heat sensitivity, vacuum screw dryers provide a gentle drying environment to effectively avoid damage to materials caused by high temperatures. This feature is particularly suitable for the treatment of volatile, perishable or easily ineffective materials. In the treatment of some special sewage or sludge, this low-temperature drying method can ensure that the quality of the material is not damaged.

4. Fine particles and uniform drying requirements

The vacuum screw dryer ensures that the material is evenly heated and stirred during the drying process through its unique design. This advantage is particularly important for projects that require fine particle processing or uniform drying. Compared with traditional drying equipment, its spiral stirring action can effectively avoid material agglomeration or uneven drying, significantly improving the quality and performance of the dried material.