Rongda Mechanical 01Pendulum-Type Cooling Machine

Innovative Solution for Granular Material Cooling - Pendulum-Driven Cooling System

Introduction: Advanced Granular Material Cooling

In the biomass pellet production, feed processing, and organic fertilizer industries, cooling hot granular materials (e.g., biomass pellets, feed granules, fertilizer prills) from 65-95°C to ambient temperature (20-32°C) is a critical post-processing step that directly impacts product quality and storage stability. Hot materials often cause moisture condensation in packaging, leading to mold growth, clumping, and shortened shelf life—issues that cost operations thousands in wasted products annually. The 01Pendulum-Type Cooling Machine from RD Machinery is engineered to solve this challenge, leveraging a unique pendulum-driven material conveying structure paired with multi-layer forced air circulation to deliver fast, uniform cooling while minimizing product breakage. Available in three models (PDL-8, PDL-15, PDL-25) with capacities ranging from 8 to 25 tons per hour, this machine caters to small-to-large scale operations—from local biomass cooperatives and mid-sized feed mills to industrial fertilizer plants—that require reliable, space-efficient cooling solutions.

Why Choose Our 01Pendulum-Type Cooling Machine?

Operations handling granular materials face distinct cooling challenges: conventional vibratory coolers struggle with uneven material distribution, while rotary coolers occupy excessive floor space and risk damaging fragile pellets. The 01Pendulum-Type Cooling Machine addresses these pain points by combining three key advantages: space efficiency (vertical pendulum structure reduces floor space by 40% vs. horizontal coolers), gentle handling (pendulum motion minimizes breakage to<0.5%), and fast cooling (achieves 95% cooling efficiency in 10-20 minutes). It adapts to diverse granular materials—from soft biomass pellets (6-10mm) to hard fertilizer prills (2-5mm)—and integrates seamlessly into existing production lines.

Key Features: Engineered for Innovation, Efficiency, and Material Care

The 01Pendulum-Type Cooling Machine redefines granular material cooling with its unique design and performance-focused features. Here's what sets it apart from conventional cooling equipment:

Pendulum-Driven Conveying for Gentle, Uniform Material Flow:

At the core of the machine is a vertical pendulum mechanism (driven by a 1.5-3 KW variable-speed motor) that moves materials in a slow, cascading motion across three to five inclined cooling layers. This gentle movement ensures every granule is evenly exposed to cooling air, eliminating "hot spots" and reducing breakage to<0.5%—critical for high-value products like premium biomass pellets or precision feed. The pendulum speed (5-12 cycles per minute) is adjustable via a VFD, allowing operators to tailor material residence time to specific cooling needs (e.g., slower for dense fertilizer prills, faster for light biomass pellets).

Multi-Layer Forced Air Circulation for Fast Cooling:

A high-efficiency air system complements the pendulum structure: three to six centrifugal fans (depending on model) blow ambient air upward through the cooling layers, while top-mounted exhaust fans remove hot, moist air—creating a "counter-flow" heat exchange that accelerates cooling. Each cooling layer features a perforated stainless steel bed (304 SS) with 1.5mm holes, ensuring air passes evenly through the material bed without causing granule entrainment. This design cools materials from 85°C to ambient +4°C in 12-18 minutes, 30% faster than single-layer coolers.

Space-Saving Vertical Design for Flexible Installation:

The machine's vertical orientation (height 3.2-4.5m, width 1.8-2.5m) reduces floor space requirements by 40% compared to horizontal rotary or vibratory coolers—ideal for facilities with limited workshop space. It features a compact inlet (300×400mm) and outlet (400×500mm) that align with standard conveyor heights, allowing seamless integration between pellet mills/extruders and packaging machines without costly modifications.

Easy Maintenance & Hygienic Design:

• Quick-Access Panels: Removable side panels and top hatches provide full access to cooling layers and fans, allowing technicians to clean residual material or replace parts in 25 minutes—half the time required for horizontal coolers.
• Hygienic Materials: All material-contacting parts (pendulum arms, cooling beds, inlet/outlet chutes) are made of food-grade 304 stainless steel, meeting EU 10/2011 and US FDA standards for feed and food-related applications. The smooth surface prevents material buildup and simplifies sanitization.
• Self-Cleaning Bed: Each cooling layer's perforated bed is angled at 15°, allowing residual material to slide out during shutdown—reducing manual cleaning frequency by 60%.

Intelligent Control & Safety Features:

A 7-inch touchscreen PLC control panel monitors key parameters in real time: inlet/outlet temperature, pendulum speed, fan speed, and material level. Operators can save 5 custom cooling profiles (e.g., "biomass pellet," "pig feed," "fertilizer prill") to reduce setup time when switching materials. Safety features include a high-temperature alarm (triggers if outlet temperature exceeds 35°C), an overload protector for the pendulum motor, and emergency stop buttons on both the control panel and machine frame—ensuring compliance with global industrial safety standards (CE, OSHA).

Technical Specifications: Model-by-Model Performance

The 01Pendulum-Type Cooling Machine's specifications are tailored to each model's capacity and application scope. Below is a comprehensive parameter table:

Industry Applications: Powering Granular Material Cooling Globally

The 01Pendulum-Type Cooling Machine's versatility and performance make it a critical asset across industries handling granular materials. Below are real-world case studies that demonstrate its impact:

1. Mid-Scale Biomass Pellet Plant (PDL-15 Model)

Case Study: A biomass plant in Poland produces 18 tons of wood pellets daily, with pellets exiting the RD-508MX Biomass Pellet Mill at 80-85°C. The plant installed the PDL-15 Pendulum-Type Cooling Machine to replace an outdated vibratory cooler that caused 3% pellet breakage and required 2.5 hours of daily cleaning. The PDL-15 reduces breakage to 0.4%, cuts cooling time to 15 minutes, and slashes cleaning time to 30 minutes/day. The plant's product waste has dropped by 85%, and the vertical design freed up 40% of floor space for a new packaging line. Annual savings from reduced waste and increased throughput are estimated at €14,000.

2. Small Feed Mill (PDL-8 Model)

Case Study: A feed mill in Thailand produces 10 tons of chicken feed granules daily, with granules exiting the extruder at 75-80°C. The mill chose the PDL-8 model for its compact size (fits in a 2×2m workshop corner) and gentle handling. The pendulum motion keeps granule breakage below 0.3%, improving feed palatability and reducing customer complaints by 90%. The multi-layer air system ensures uniform cooling, eliminating moisture condensation in 5kg bags—extending feed shelf life from 30 days to 60 days. The mill's owner notes: "We used to throw away 5% of our feed due to mold; now it's less than 0.5%."

3. Industrial Fertilizer Plant (PDL-25 Model)

Case Study: A fertilizer plant in Brazil produces 28 tons of organic fertilizer prills daily, with prills exiting the granulator at 90-95°C. The plant installed the PDL-25 to cool prills to 30-32°C before bagging—critical for preventing fertilizer clumping (a common issue with hot prills). The machine's 5 cooling layers and 6 fans achieve 95% cooling efficiency in 12 minutes, and the 304 stainless steel contact parts resist corrosion from fertilizer salts. The plant's clumping rate has dropped from 12% to 1.5%, and maintenance costs have been cut by 40% compared to their old rotary cooler.

Why Choose Rongda Machinery? Your Partner for Innovative Cooling Solutions

At Rongda Machinery, we understand that cooling equipment must align with your operation's unique constraints—whether space, material type, or production scale. The 01Pendulum-Type Cooling Machine is backed by our commitment to customization, support, and reliability:

• Tailored Solutions: We help you select the right model (PDL-8 to PDL-25) and add optional features (e.g., dust collection, fire suppression) based on your needs. For corrosive environments (e.g., fertilizer plants), we offer upgraded 316 stainless steel contact parts; for cold climates, we provide insulated fan housings to prevent air temperature fluctuations.
• Global Technical Support: Our technicians provide on-site installation, operator training (1 day), and preventive maintenance plans. We offer 24/7 technical support via phone or video call, and our global spare parts network ensures fast delivery of pendulum components, fans, and filters (typically within 3-5 days) to minimize downtime.
• Quality & Compliance Guarantee: Each 01Pendulum-Type Cooling Machine comes with a 2-year warranty on the pendulum mechanism and frame, and a 1-year warranty on electrical components. We provide compliance documentation (CE, ISO 9001) to help you meet local industry regulations.