Comparison: Belt Press vs. Stacked Spiral Screw Dewatering Machine

1. High Operational Costs of Belt Presses
   While constructing a wastewater treatment plant may be straightforward, maintaining daily operations poses significant challenges—largely due to the high operating costs of traditional dewatering equipment like belt presses.
   These systems incur substantial water and electricity consumption, in addition to ongoing labor and maintenance expenses.
   In contrast, the stacked spiral sludge dewatering machine operates at low rotational speeds, consuming less than 2 kWh even at full capacity. It supports continuous, automated operation with minimal human intervention, greatly reducing labor and operational costs.

2. Clogging Issues in Belt Press Machines
   Belt presses, centrifuges, and plate-and-frame presses are all prone to clogging during the solid-liquid separation process—a long-standing industry challenge that has persisted due to a lack of fundamental innovation.
   To mitigate blockages, these machines require intensive high-pressure water cleaning, which not wastes water but also increases the internal hydraulic load of the treatment plant. Clog-related downtime disrupts operation and affects overall productivity.
   The stacked spiral sludge dewatering machine, however, utilizes a unique design consisting of alternating fixed and moving rings. As the screw shaft rotates, the movement of the rings continuously clears debris from the gaps, providing a truly clog-free operation.

Working Principle

1. Concentration: As the spiral shaft rotates, the relative motion between the fixed and moving rings creates gravity drainage zones, allowing free water to escape rapidly through the gaps—resulting in efficient preliminary sludge thickening.

2. Dewatering: The concentrated sludge is conveyed forward by the rotating shaft. Along the discharge direction, the pitch of the screw gradually decreases, reducing the space between the rings and increasing internal pressure. Under the counterforce from the discharge gate, moisture is steadily squeezed out, resulting in progressively drier sludge cake.

3. Self-Cleaning: The continuous rotation of the spiral shaft drives the moving rings, creating shear and clearance movements that prevent clogging and ensure consistent operation without manual cleaning—setting it apart from conventional dewatering equipment.

       Jiangsu Longdai Environmental Protection Group Co., Ltd. is an environmental protection equipment manufacturer with more than 15 years of experience. It has provided a large number of sophisticated environmental protection equipment at home and abroad, established three branches in China, and cooperated with many universities to build Longdai R&D center. There are 4 middle doctors, 10 masters, and 25 senior engineers.

       Main business: "Petrochemical Wastewater Treatment, Urban and Rural Wastewater Treatment, Waste Gas Collection and Treatment, Industrial Wastewater Treatment, etc."

       Main equipment: "Integrated treatment equipment, grille decontamination machine, sand water separator, mud scraper, air flotation device, dosing device, sludge thickener, rotary drum micro filter, conveyor,Manual and Mechnical Bar Screen ,Bridge Scrapers ,Ordor Control System,Belt/Screw Conveyor,Disc Filter etc."

       Work follows 5 principles:

1.Sales

       The sales team keeps abreast of market prices and provides customers with the most accurate and most favorable quotations.

2.design

       The technical team participates in technical exchange meetings every year, exchanges experience with professionals, continuously improves technical competitiveness, and provides customers with the clearest and most practical design solutions.

3.manufacture

       The processing team controls the manufacturing details of each equipment, and manufactures the most sophisticated and reliable equipment for customers.

4.transportation

       The transportation team has been to every corner at home and abroad, and has never made any mistakes, planning the best route, and transporting equipment for customers is the fastest and safest.

5.quality

       The company has passed ISO9001-2008 international standard quality system certification.

       We look forward to contacting you, please give us a chance. I hope we can trust each other for mutual benefit and win-win results.

       Best wishes.

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       The following is our company's information:

       Jiangsu Longdai Environmental Protection Technology Co., Ltd.

       Phone: 0510-87837699

       Fax: 0510-87837599

       Chinese website: www.zgldhb.com

       Foreign language website: http://www.longdaiwwt.com/

       Email: longdaicompany@126.com

       Address: No. 20, Chengwen Road, Gaocheng Town, Yixing City

       Zip code: 214214