Sebzeler
True pneumatic fluidization individually freezes green peas, sweet corn, diced carrots, cut beans, and broccoli florets without clumping.
Akışkan yataklı dondurucu
Square’s fluidized bed freezer delivers fast IQF freezing for small food pieces like peas, sweet corn, diced vegetables, berries, shrimp, and diced meat from 500 to 6,000 kg/h.
Available in full and semi fluidized models, it uses two conveyor stages for crust and core freezing. High efficiency coils boost heat transfer by 20% while keeping weight loss under 1.5%.
Vertical upward airflow suspends and separates individual pieces for true IQF freezing
Two stage crust freezing and core freezing conveyors prevent clumping and surface adhesion
Rapid surface ice crust formation keeps product dehydration below 1.5%
Ürün Özellikleri
Neden Square'in Flüidleştirilmiş Yataklı Dondurucuyu Seçmelisiniz?
Two stage airflow, gentle belt agitation, and continuous defrost for high output IQF lines.
Etkin Hava Akışı
Air ducts and perforated bed plates spread upward airflow evenly across the full belt width so pieces float and freeze separately.
İki aşamalı dondurma
Two separate belts control crust freezing and core freezing. The first zone uses strong upward air to lock in surface moisture and stop clumping. The second zone finishes freezing the core to −18°C with gentler air.
Automated CIP (CIP) Auto Cleaning System
Automated wash, rinse, and sanitize programs clean the belt, air plenum, coils, and stainless steel interior between shifts.
Verimli Santrifüj Fan
High pressure centrifugal fans matched to bed depth and food weight keep the product bed floating evenly across load changes.
Sarsma Cihazı / Karıştırma Cihazı / Darbe Cihazı
Mechanical shakers, rotary agitators, or pulsed air jets keep wet or sticky pieces from sticking together in the first zone.
Etkin Buharlaştırıcı
Designed with European thermal software, our coils use hydraulically expanded tubes and variable fin spacing to boost heat transfer and slow frost buildup.
Air Defrost System (ADF)
The Air Defrost System (ADF) blows pulsed air across the coil fins during production to stop frost bridges and extend run time.
Teknik Özellikler
Parametreler
Standard specifications are listed below. We size bed width, zone lengths, upward air speed, and bed plates for your product.
| Konfigürasyon | Two zone fluidized bed: Zone 1 (high velocity) + Zone 2 (moderate velocity) |
|---|---|
| Kapasite | 500 to 6,000 kg/h (product dependent) |
| Yatak genişliği | 800 to 2,000 mm |
| Yatak uzunluğu | 4 to 14 m (Zone 1 + Zone 2) |
| Hava akışı | Zone 1: 4 to 6 m/s; Zone 2: 2 to 4 m/s (adjustable) |
| İşletim sıcaklığı | −30°C ile −40°C (hava) |
| Soğutucu | NH₃ (Ammonia) / CO₂ (pump recirculated) |
| Evaporatör | Industrial finned tube, variable fin pitch, ADF or sequential hot gas defrost |
| Serinleme zamanı | 6 to 15 min (product dependent) |
| Yatak plakası | Interchangeable perforated plates engineered per product particle size |
| Dehidrasyon oranı | < 1.5% |
| Kontrol sistemi | PLC touchscreen, recipe storage, per zone velocity & temperature, data logging |
| Tipik teslim süresi | 16 to 20 weeks |
| Design life | 15+ years (structural); 8 to 12 years (mechanical components) |
Design Detayları
How Each Subsystem Is Engineered
Open each section below to see how key parts of the freezer work.
Flüidleşme Nasıl İşler
Fluidization occurs when upward air velocity equals or exceeds the minimum fluidization velocity, the point at which aerodynamic drag force on each particle equals its weight:
- Particles become suspended in the upward air stream
- Each piece is surrounded by cold air on all surfaces
- The product bed behaves like a fluid, allowing particles to flow and separate gently
- Heat transfer is maximized through direct, all around air contact
Minimum fluidization velocity depends on particle size, density, and shape. Peas fluidize at approximately 2 to 3 m/s, while green beans require 3 to 4 m/s. The bed plate, air velocity, and bed depth are engineered per product.
Two Zone Freezing Process
Zone 1 (Crust Freeze): Strong upward air (4 to 6 m/s) floats each piece. Surface moisture freezes into a thin crust in 2 to 4 minutes, preventing clumping.
Zone 2 (Core Freeze): Gentler air (2 to 4 m/s) finishes freezing the core to −18°C in 4 to 10 minutes while saving fan power.
Dehidrasyon: Neden Akışkan Yataklı Yöntem Kilo Kaybını Azaltır?
Dehydration directly impacts line profitability (1% weight loss on 10,000 tons/year equals 100 tons of lost salable product):
- Short residence time: 6 to 15 minutes compared to 15 to 60 minutes in spiral freezers
- Rapid surface crust: surface moisture is immobilized as ice within 1 to 3 minutes
- Low air temperature (−30°C to −40°C): minimizes vapor pressure differential
- High relative humidity inside the freezing chamber limits sublimation
Ürün Uygunlukları ve Sınırlamaları
İdeal kullanım alanları: Individual, separable particulates including peas, sweet corn, diced vegetables, berries, shrimp, scallops, and diced meat (particle size 5 to 50 mm, 3 to 50 g per piece).
Uygun değildir: Large pieces (> 80 mm) that cannot be fluidized, very light leafy items, or flat sheeted products better suited to impingement tunnel or spiral freezers.
Yatak plakası tasarımı ve değiştirme
Perforated bed plates are engineered to match product particle geometry and bulk density:
- Perforation diameter from 2 to 8 mm, selected according to product particle size
- Open area ratio of 15% to 30% to maintain target plenum static pressure and fluidization velocity
- Slide out rail mounting allows complete bed plate changeover in under 15 minutes
- Interchangeable bed plates can be supplied for seasonal multiple product plants
- Adjustable bed inclination (0° to 5°) regulates forward transport velocity
Bu Gıda Uygulamalarında Kanıtlanmıştır
Patates kızartması
Two stage crust and core freezing keeps french fries and potato wedges straight, free flowing, and protected against breakage.
Ahududalar
Upward airflow and gentle shakers freeze whole strawberries, blueberries, raspberries, and diced fruit without bruising.
Sıkça Sorulan Sorular
Our fluidized bed freezers use welded SUS304 stainless steel interiors, pull out bed plates, walk in doors, and automated CIP spray headers for fast daily cleaning.
Full fluidized freezers suspend lighter particulates (such as peas, corn, and berries) completely in an upward air cushion. Semi fluidized freezers combine upward airflow with mechanical belt transport and agitation for heavier or denser items (such as larger shrimp, scallops, or diced meat).
Square holds ISO 9001, ISO 45001, CE, PED, ASME (U and U2 stamps), EAC, CSA, CRN, and CNAS laboratory accreditation, supported by 300+ patents, 300+ R&D engineers, and 300+ installation and service engineers.
We customize full-fluidized and semi-fluidized bed freezers with capacities up to 6 tons/h, tailoring belt width, two-stage freezing zones, airflow settings, mechanical agitation devices, and optional CIP cleaning or pre-treatment lines to your product.
A fluidized bed freezer uses high-velocity upward airflow to lift and tumble small food items so each piece freezes individually and uniformly, making it ideal for IQF (Individual Quick Freezing) applications.
Mühendislik İncelemesi
Flüidleştirilmiş Yataklı Dondurucu Projenizi Tartışın
Share your product and hourly output for an IQF fluidized bed quote.
Our engineers reply within 24 hours. All project details are kept confidential.
