Views: 0 Author: Site Editor Publish Time: 2026-11-04 Origin: Site
At CSTHEATEXCHANGER, we design and manufacture high-static, heavy-duty Fluidized Bed IQF Evaporator Coils and Aeration Air Coolers engineered specifically for continuous green pea, sweet corn kernel, edamame, and diced carrot fluidized freezing tunnels (refrigeration capacities manufactured from 50 kW to over 1,500 kW per tunnel unit, high-pressure air delivery rates from 20,000 m3/h to over 320,000 m3/h, operating at evaporating temperatures of −38∘C to −48∘C with ammonia NH3, CO2, or Freon refrigerants). Operating with high-static vertical upward airflow design (400 Pa to 850 Pa external static pressure), our fluidized IQF evaporators generate a uniform sub-zero air cushion that lifts and suspends individual vegetable kernels in mid-air, achieving instant 360∘ surface crust-freezing in under 60–90 seconds. Built with seamless AISI 304/316L stainless steel tubes, heavy-gauge 0.45 mm marine AlMg3 aluminum corrugated fins (progressive staged pitch from 20 mm inlet to 6 mm discharge), and dual-circuit pan-first rapid hot gas defrost systems, CSTHEATEXCHANGER guarantees 100% singulated, non-clumping IQF output, vibrant natural green/golden color retention, and 24h continuous harvest uptime.
Freshly blanched, wet green peas and sweet corn kernels (+10∘C to +18∘C) enter the vibrating perforated fluidizing bed with high surface water, demanding precise vertical air velocity:
FLUIDIZED BED VEGETABLE IQF FREEZING COIL AIRFLOW DYNAMICS
======================= WET BLANCHED PEAS & CORN INFEED (+15°C) =======================
[ Wet Vegetables Dropped onto Vibrating Perforated Stainless Steel Infeed Belt ]
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┌────────────────────────────────────────────────────────────────────────────┐
│ [ZONE 1: HIGH-STATIC VERTICAL AERATION AIR CURTAIN (-40°C AIR STREAM)] │
│ • High static pressure (500–800 Pa) lifts peas & corn kernels into mid-air │
│ • True fluidization suspends individual kernels; prevents product clumping │
└───────────────────────────┬────────────────────────────────────────────────┘
│ (Instant surface crusting completed in < 60s)
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┌────────────────────────────────────────────────────────────────────────────┐
│ [ZONE 2: DEEP FLUIDIZED CORE FREEZING BED (-38°C)] │
│ • High thermal density extracts core heat to reach -18°C storage setpoint │
│ • Progressive fin pitch (20 mm -> 12 mm -> 6 mm) absorbs surface wash water│
└───────────────────────────┬────────────────────────────────────────────────┘
│
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======================= 100% SINGULATED, PERFECT IQF PEAS & CORN =======================
[ Perfectly Spherical Shape, Vibrant Natural Color, Intact Cell Walls & Zero Lumps ]================================================================================
CST FLUIDIZED BED EVAPORATORS VS. CONVENTIONAL TUNNEL FREEZING COILS
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Engineering Parameter Standard Tunnel Air Cooler CST High-Static Fluidized Bed Coil
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Airflow Direction & Static HeadHorizontal Low-Static (150 Pa) Vertical Upward High-Static (500–850 Pa)
Vegetable Fluidization State Static on belt (Mass clumping) 100% True Mid-Air Suspension (No lumps)
Surface Crusting Velocity Sluggish (3 to 5 Minutes) Ultra-Fast (60 to 90 Seconds Crust)
Staged Progressive Fin Pitch Uniform Spacing (Chokes in 4h) Progressive: 20 mm -> 12 mm -> 6 mm
Continuous Harvest Run Time Short (Frequent Defrost Stops) Continuous 16 to 24+ Hours (Full Shift)
Aerodynamic Fin Fatigue DefenseThin Fins (Bend & Crack) Heavy 0.45 mm AlMg3 Heavy-Duty Fins
Defrosting Turnaround Time 45 to 60 Minutes (Sluggish) 15 to 20 Minutes (Dual Hot Gas Pan-First)
Product Visual Quality & Yield Clumped blocks; surface bruisingPerfect free-flowing individual kernels
================================================================================If vertical air velocity is insufficient, wet blanched peas settle on the conveyor belt and freeze into solid aggregate blocks that must be mechanically broken, damaging kernel skins. CSTHEATEXCHANGER designs high-static vertical fluidization coils paired with high-efficiency axial fan arrays, producing an engineered upward air jet velocity (4.5 to 6.5 m/s) that suspends individual peas in mid-air for 100% singulated IQF quality.
Blanched sweet corn and peas rapidly lose sweetness and chlorophyll vibrancy if freezing is slow. Our deep sub-zero air stream (−40∘C to −42∘C) freezes the outer moisture film into an airtight ice shell in under 60 to 90 seconds, locking in natural sugars, crisp texture, and farm-fresh color.
Fluidized bed evaporators operate under continuous high static pressure and pulsating aerodynamic turbulence:
CST FLUIDIZED BED IQF EVAPORATOR STRUCTURAL ELEVATION
======================= FULL AISI 304 STAINLESS STEEL CASING =======================
[ High-Static Aerodynamic Fan Cowls, Sloped Hygiene Drain Pan & Hot Gas Headers ]
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┌────────────────────────────────────────────────────────────────────────────┐
│ CORE SUBASSEMBLY INTEGRATION │
│ ┌────────────────────────┐ ┌────────────────────────┐ ┌──────────────────┐ │
│ │ REINFORCED CORE │ │ HEATED DRAIN PAN │ │ HIGH-STATIC FANS │ │
│ │ Heavy 0.45 mm AlMg3 │ │ Dual hot-gas coils │ │ Cast Al Impeller │ │
│ │ SS304/SS316L tubes │ │ 3° continuous slope │ │ IP66 Washdown │ │
│ └────────────────────────┘ └────────────────────────┘ └──────────────────┘ │
└────────────────────────────────────────────────────────────────────────────┘ CST PROGRESSIVE VARIABLE FIN SPACING FLUIDIZED COIL MATRIX
WET AIR FROM BLANCHED VEGETABLE INFEED (+12°C TO +18°C AIR STREAM)
┌─────────────────────────────────────────────────────────────────────────┐
│ [ ROW 1 - 4: 20 mm FIN PITCH ] -> Deep wash water snow penetration │
├─────────────────────────────────────────────────────────────────────────┤
│ [ ROW 5 - 12: 12 mm FIN PITCH ] -> High latent moisture extraction │
├─────────────────────────────────────────────────────────────────────────┤
│ [ ROW 13 - 24+: 6 mm FIN PITCH ] -> High-density sensible cooling core │
└─────────────────────────────────────────────────────────────────────────┘
HIGH-PRESSURE VERTICAL DISCHARGE: -42°C SUB-ZERO FLUIDIZING AIR JETContinuous high-static upward airflow creates intense aerodynamic flutter that causes thin commercial fins to fatigue, crack at the tube collar, and collapse. CSTHEATEXCHANGER utilizes heavy-gauge 0.45 mm marine-grade AlMg3 aluminum fins (or optional AISI 304 stainless steel fins) mechanically locked onto heavy-wall stainless steel tubes, ensuring zero fin flutter or fatigue over decades of continuous harvesting operations.
Wet blanched corn and peas carry substantial surface moisture. Our staged progressive fin spacing (20 mm→12 mm→6 mm) ensures airborne water droplets freeze along open channels without clogging the air-entering face, extending continuous harvest processing runs to 16–24+ hours.
CSTHEATEXCHANGER FLUIDIZED BED EVAPORATOR CONFIGURATIONS
[1. TWO-STAGE MODULAR FLUIDIZED TUNNEL EVAPORATORS]
• Stage 1: Ultra-high-velocity vertical crusting zone (rapid outer shell freezing).
• Stage 2: Deep fluidized core freezing zone ensuring -18°C center temperature.
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[2. HIGH-CAPACITY AMMONIA (NH3) PUMPED OVERFEED TUNNEL COILS]
• Heavy-wall AISI 304/316L stainless steel tubes optimized for 4:1 liquid overfeed.
• Sanitary TIG-welded casing with integrated double-wall insulated sloped drain pan.
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[3. HIGH-PRESSURE CO2 (R744 - UP TO 90 BAR) FLUIDIZED BED COILS]
• High-strength stainless or CuFe2P alloy tubes for natural, eco-friendly deep freezing.(Note: The following engineering parameters represent standard manufacturing design envelopes. External static pressure, progressive fin pitch stages, tube circuits, and casing dimensions are customized to specific fluidized tunnel manufacturer drawings.)
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CSTHEATEXCHANGER FLUIDIZED BED IQF EVAPORATOR (CST-IQF-FLUID SERIES)
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Engineering Parameter Standard Manufacturing & Design Range
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Refrigeration Capacity Range 50 kW to 1,500+ kW per tunnel evaporator (Scalable)
Air Circulation Flow Rates 20,000 m³/h to 320,000+ m³/h (11,700 to 188,000+ CFM)
External Static Pressure Head 400 Pa to 850 Pa (High-Pressure Aeration Head)
Operating Evaporating Temp. -38°C to -48°C (-36.4°F to -54.4°F) Deep IQF Freezing
Compatible Refrigerants NH3 (R717 Overfeed Pump Circulation), CO2 (R744), R404A, R507
Progressive Fin Pitch Stages Inlet: 16–25 mm -> Intermediate: 10–14 mm -> Discharge: 6–8 mm
Tube Metallurgy Options Seamless AISI 304, AISI 316L Stainless Steel, CuFe2P, Copper
Tube Outside Diameter (OD) 5/8" (15.88 mm) or 3/4" (19.05 mm) Heavy Wall (0.8–1.5 mm)
Fin Material Options Marine-Grade AlMg3 Aluminum Alloy, Pure Al, AISI 304 Stainless
Fin Thickness Range 0.35 mm to 0.50 mm (Heavy gauge for high-static aeration)
Casing & Frame Construction Continuous TIG-Welded AISI 304 or AISI 316L Stainless Steel (3 mm)
Drain Pan Configuration Double-Wall Insulated, 3° Sloped Bottom, Dual Hot-Gas Heating Coils
Axial Fan Array Specifications IP66 High-Static Direct-Drive Axial Fans, Cast Aluminum Impellers
Defrosting Technology Rapid Dual-Circuit Hot Gas (Pan-First Loop), Water Spray, Electric
Operating Pressure Rating NH3 / Freon: 25 bar (362 psi) | CO2: Up to 90 bar (1,305 psi)
Pressure Vessel Compliance ASME Section VIII Div. 1, CE / PED 2014/68/EU Module H, ISO 9001
Quality Assurance & Leak Gate 100% Helium Mass Spectrometer Vacuum Testing (Zero Leak Standard)
================================================================================Green peas and corn kernels have spherical shapes and wet surfaces. Without sufficient upward air static pressure, they remain resting on the conveyor belt, freezing together into solid blocks. CST's high-static vertical aeration coils generate strong upward air jets (4.5–6.5 m/s) that lift and suspend individual kernels in mid-air, guaranteeing 100% singulated, lump-free IQF quality.
Fresh blanched vegetables introduce substantial surface wash water into the freezing tunnel. With wide 16–20 mm fin spacing at the inlet, frost deposits evenly along the fin depth without blocking the air face. The fin spacing then tightens to 6–8 mm at the discharge, extending continuous harvest freezing runs to 16–24+ hours between defrosts.
Yes. We specialize in designing and manufacturing 100% dimensional drop-in replacement fluidized bed evaporator coils for major continuous tunnel freezer brands worldwide. We match exact tunnel mounting dimensions, fan orifice positions, refrigerant supply/suction header orientations, and coil static pressure curves for seamless field retrofits.
Achieve 100%100% free-flowing singulated vegetable freezing, eliminate harvest downtime, and ensure complete food hygiene compliance with CSTHEATEXCHANGER:
Custom Fluidized Bed Vegetable IQF Evaporator Coils (50 kW to 1,500 kW+)
Seamless AISI 304/316L Stainless Tubes with Heavy AlMg3 or All-Stainless Steel Fins
High-Static Vertical Aeration (400–850 Pa) for 100% Mid-Air Fluidization
Progressive Variable Fin Pitch (20 mm→12 mm→6 mm) for 24h Harvest Uptime
Rapid 15–20 Minute Dual-Circuit Pan-First Hot Gas Defrost Systems
Full ASME / CE PED Module H Compliance, 100% Helium Leak Tested & Factory-Direct Delivery
Contact our specialized vegetable refrigeration engineering department today with your product type (peas/corn/edamame), hourly freezing capacity (kg/h), tunnel dimensions, refrigerant type, and evaporating temperature for custom CAD engineering proposals and factory-direct quotations.
Website: https://www.cstheatexchanger.com/
Technical Inquiries: info@cstheatexchanger.com
