Sludge Treatment Drum Granulator Production Line

As a high-efficiency integrated treatment system, the Sludge Treatment Drum Granulator Production Line focuses on solving the industry pain points of sludge disposal—such as high moisture (often 60%-90%), large volume, and potential environmental risks. It realizes the "three-in-one" goal of harmless treatment, volume reduction, and resource recycling for multiple types of sludge, including municipal domestic sludge, industrial sewage sludge (printing and dyeing, electroplating, chemical engineering), and agricultural breeding sludge. By converting intractable "environmental waste" into valuable resources, it provides a compliant and profitable solution for sludge management.

Core Process Flow: Full-Automated Granulation with Controllable Quality

The production line adopts a flexible modular structure, which can be customized and adjusted according to the sludge's moisture content, viscosity, and component characteristics. The whole process is controlled by an intelligent PLC system, with clear process nodes and stable operation:

1. Sludge Pretreatment: Raw sludge is conveyed to a double-shaft mixing mixer, where dry powder modifiers (coal ash, bentonite, or recycled fine powder from the production line) are added at a ratio of 1:0.2-0.5. This step adjusts the sludge's moisture to 60%-70% and reduces viscosity, laying the foundation for smooth granulation;

1. Drum Granulation (Core Link): The pretreated sludge mixture is fed into the sludge-specific drum granulator at a uniform speed. The drum, with a tilt angle of 3°-5° and a rotational speed of 15-25 r/min, uses the synergistic effect of centrifugal force, friction, and gravity to roll the material into spherical/elliptical granules. The particle size can be adjusted between 2-10mm by modifying the drum speed or adding a baffle;

1. Low-Temperature Drying & Rapid Cooling: Wet granules (moisture 40%-50%) are sent to a three-pass rotary dryer, where the temperature is precisely controlled at 80-120℃ (to prevent the decomposition of organic matter and volatilization of harmful gases). After drying, the moisture content is reduced to ≤15%; then, the granules enter a counterflow cooler, which cools them to room temperature (±5℃) within 10-15 minutes, enhancing granule hardness (≥2.5kg/cm²) and storage stability;

1. Screening, Recycling & Packaging: A high-frequency vibrating screen (screen mesh 2mm/10mm) separates qualified granules (2-10mm) from unqualified materials (fine powder <2mm, lumps >10mm). The unqualified materials are returned to the pretreatment link for secondary granulation (utilization rate ≥95%); qualified granules are conveyed to an automatic weighing and packaging machine (packing weight 25kg/50kg), with a packaging speed of 15-20 bags per minute.

Core Advantages: Leading Performance in Environmental Protection and Economy

· Strong Sludge Compatibility: It can handle sludge with moisture 60%-90% and viscosity 500-3000 cP, without the need for pre-classification. For high-viscosity sludge (such as printing and dyeing sludge), adding 30% coal ash can achieve normal granulation, with a single-line treatment capacity of 1-30 tons/hour (covering small pilot projects to large-scale industrial plants);

· Strict Environmental Compliance: The entire production line is equipped with a closed negative-pressure system, and a two-stage deodorization device (biological filter + activated carbon adsorption) is optional, ensuring that the odor concentration (ammonia, hydrogen sulfide) meets the national "Emission Standard for Odor Pollutants" (GB 14554-93). The final granulated products, after testing, comply with the "Standards for Organic Fertilizers" (NY 525-2021) or "Standards for Fuel Additives for Industrial Boilers", avoiding secondary pollution;

· Energy-Saving & Low Operating Cost: The drum granulator uses a high-chromium alloy wear-resistant liner (thickness 15mm), with a service life of ≥3 years (reducing liner replacement frequency by 50% compared to ordinary steel); the dryer is equipped with a flue gas waste heat recovery device, which recycles 60% of the waste heat, reducing natural gas/coal consumption by 18%-22% compared to traditional equipment. The whole line only needs 2-3 operators, saving 60% of labor costs;

· High-Quality Granule Output: The granule roundness is ≥92%, the particle size uniformity is ≥90%, and the water solubility (for fertilizer) is ≥85% (30 minutes of immersion). When used as organic fertilizer, it can increase crop yield by 8%-12%; when used as a fuel additive, it can improve combustion efficiency by 5%-8%, with no easy breakage during transportation (breakage rate ≤3%).

Target Application Scenarios

This production line is a must-have equipment for:

· Municipal sewage treatment plants (disposing of domestic sludge, realizing resource recycling);

· Industrial enterprises (chemical, printing and dyeing, electroplating, breeding) (meeting environmental protection inspection requirements and reducing sludge disposal costs);

· Environmental protection engineering companies (providing turnkey sludge treatment solutions for clients);

· Waste resource recycling centers (converting sludge into high-value organic fertilizer or fuel additives for profit).

By choosing this production line, enterprises can not only fulfill their environmental responsibilities but also create additional annual profits of 500,000-5 million yuan (depending on treatment capacity), achieving a sustainable development model of "environmental protection + economy".