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Product Description of LQQ Series Fluidized Bed Cooler
The LQQ Series Fluidized Bed Cooler is a high-efficiency sand cooling system based on fluidization principles, designed for reclaimed sand systems in foundries. It rapidly and uniformly cools hot reclaimed sand (80–120°C) to below 50°C, while adjusting surface moisture and removing fines and dust—ensuring optimal sand flowability, compactability, and mold strength. Utilizing a perforated plate + clean air bubbling fluidization technology, the LQQ suspends sand particles in a "boiling" state, enabling efficient heat transfer and uniform cooling—a critical solution for high-pressure molding lines requiring stable sand temperature, consistent moisture, and low dust content.
The LQQ is widely used in furan, alkaline phenolic, and sodium silicate sand reclamation processes, with cooling capacities from 10 to 100 t/h. It integrates seamlessly with bucket elevators, mixers, dust collectors, and sand temperature monitors—forming a fully automated sand loop that improves casting surface quality and reduces defects like porosity and sand adhesion.
Working Principle
Hot Sand Feeding Hot reclaimed sand enters the inlet buffer zone via elevator or pneumatic conveyor, then is evenly distributed onto the fluidized bed by a VFD-controlled vibrator or rotary valve—preventing localized buildup.
Fluidized Cooling & Heat Exchange Clean cooling air from a centrifugal fan enters the plenum chamber and passes through a perforated air distribution plate, suspending sand particles in a fluidized "boiling" state at a bed height of 0.8–1.2 m. Intense contact between sand and air enables rapid heat removal—cooling sand from 100°C to 45–50°C with >90% efficiency.
Moisture Adjustment & Dust Removal An optional fine mist humidification system can inject atomized water into the airflow, adjusting surface moisture to 0.2–0.5% for improved compactability. Simultaneously, rising air carries fines and dust to the top-mounted dust collector (pulse-jet bag filter), with emissions <10 mg/m³—eco-compliant.
Cooled Sand Discharge Cooled sand discharges continuously via a tilted outlet or overflow weir to downstream silos or mixers. Output is precisely controlled by adjusting airflow or outlet height.
Smart Monitoring & Protection
Equipped with sand temperature sensors, air pressure monitors, level switches, and vibration detectors, the PLC system provides real-time monitoring, fault warnings, automatic interlocks, and remote diagnostics.
Key Features
Fluidized Cooling, Uniform Sand Temperature Sand particles are fully suspended—no dead zones, discharge temperature variation ≤3°C, ensuring uniform resin reaction and fewer casting defects.
High Cooling Efficiency, Low Energy Energy consumption 30–50% lower than rotary drum coolers, cooling time 3–5 minutes, capacity 1.5–2.5 t/(h·m²)—significant energy savings.
Compact Structure, Stable Operation No moving parts in bed—low failure rate, minimal maintenance Perforated plate: wear-resistant stainless steel or ceramic composite, lifespan ≥10,000 hours Overall lifespan ≥12 years
Smart Control, Easy Operation PLC + color HMI, multi-recipe, data logging, trend analysis Optional PROFINET / MODBUS TCP / ETHERNET/IP for MES integration Sand temperature feedback automatically adjusts airflow—closed-loop control
Eco-Compliant, Dust-Controlled High-efficiency pulse-jet bag filter, emissions <10 mg/m³ Noise ≤75 dB(A), compliant with GB 16297 and EU IED Fully enclosed—no dust leakage
Easy Maintenance, Minimal Downtime Top quick-opening access door for inspection and cleaning Modular perforated plate—individual replacement possible Supports online monitoring and remote diagnostics
Main Technical Specifications
Cooling Capacity
10–15 t/h
20–30 t/h
40–60 t/h
80–100 t/h
Inlet Sand Temp.
80–120°C
80–120°C
80–120°C
80–120°C
Outlet Sand Temp.
≤50°C Adjustable
≤50°C Adjustable
≤50°C Adjustable
≤50°C Adjustable
Cooling Air Volume
3,000–5,000 m³/h
6,000–10,000 m³/h
12,000–18,000 m³/h
20,000–30,000 m³/h
Fan Motor
15 kW
30 kW
55 kW
90 kW
Bed Area
2.0 m²
4.0 m²
8.0 m²
15.0 m²
Control System
PLC + Color HMI
PLC + Color HMI
PLC + Color HMI
PLC + Color HMI
Communication
MODBUS RTU / PROFINET
MODBUS RTU / PROFINET
MODBUS RTU / PROFINET
MODBUS RTU / PROFINET
Weight
2,500 kg
4,800 kg
8,200 kg
14,000 kg
Protection Rating
IP55 (Control Cabinet IP65)
IP55 (Control Cabinet IP65)
IP55 (Control Cabinet IP65)
IP55 (Control Cabinet IP65)
Typical Applications
Rapid cooling of hot reclaimed sand in resin sand reclamation lines
Precise control of sand temperature and moisture before mixing
Integrated with S25 mixer, GTD elevator, and dust collector for full automation
Supports multi-temperature settings for different molding lines
Connects to MES for traceability and energy management
Company Profile
Qingdao Dingli Machinery Co., Ltd.
Qingdao Dingli Machinery Co., Ltd. is a company specializing in the production of casting machinery equipment. It mainly manufactures equipment for casting clay sand, resin sand, coated sand, wet sand drying, lost foam casting, sodium silicate sand, etc. It can undertake various turnkey projects, including the design, manufacturing, installation and commissioning of mechanical sand processing. Our factory has strong technical strength and advanced processing equipment. We have long-term and close technical cooperation with many senior experts and scholars from domestic universities and research institutions. We can provide users with high-performance, reliable products and satisfactory services. Our company adheres to the principles of promoting enterprise development through technology, prioritizing quality, continuous improvement and customer satisfaction. We are willing to sincerely cooperate with friends from all walks of life to achieve common prosperity. Our company mainly undertakes the following projects: 20-180t/h mechanized clay sand processing production line and single machine equipment turnkey project. Annual production of 1000 to 20,000 tons of consolidated resin sand casting mechanized production line and single machine equipment turnkey project. Annual production of 3,000 to 10,000 tons of hot processing coated sand complete equipment and single machine equipment turnkey project. Annual production of 3,000 to 7,000 tons of hot coating sand regeneration complete equipment and single machine equipment turnkey project. 5-15t/h sodium silicate mechanical production line and single machine equipment turnkey project. 5-30t/h three-stage sand drying equipment and single machine equipment turnkey project. 5-40t/h lost foam casting complete equipment and single machine equipment turnkey project and other types of shot blasting cleaning equipment, lifting equipment, conveying equipment, cooling equipment, magnetic separation equipment, environmental protection dust removal equipment. Welcome to contact us~
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2013
Ecer Certification：
Verified Supplier
Qingdao dingli machinery Co., Ltd is located in the famous coastal city, the hometown of casting machine - Qingdao, since its establishment, we are always adhering to the traditional industries with the aim of combined closely with the foreign advanced technology, through the introduction, cooperati... Qingdao dingli machinery Co., Ltd is located in the famous coastal city, the hometown of casting machine - Qingdao, since its establishment, we are always adhering to the traditional industries with the aim of combined closely with the foreign advanced technology, through the introduction, cooperati...
