Continuous Industrial Freeze Dryer

Continuous Industrial Freeze Dryer

The Continuous Industrial Freeze Dryer is an automated processing system engineered for 24/7, uninterrupted bulk sublimation of heat-sensitive food, botanical, and chemical materials. Unlike batch freeze dryers that require cyclical loading, chamber depressurization, sterilization, and thermal ramping, this system utilizes a dynamic multi-stage vacuum airlock assembly. Bulk material moves progressively from atmospheric feed zones through freezing, primary sublimation, and secondary desorption zones while the main process chamber maintains a stable operational vacuum.
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Description
Technical Parameters

The Continuous Industrial Freeze Dryer is an automated processing system engineered for 24/7, uninterrupted bulk sublimation of heat-sensitive food, botanical, and chemical materials. Unlike batch freeze dryers that require cyclical loading, chamber depressurization, sterilization, and thermal ramping, this system utilizes a dynamic multi-stage vacuum airlock assembly. Bulk material moves progressively from atmospheric feed zones through freezing, primary sublimation, and secondary desorption zones while the main process chamber maintains a stable operational vacuum.


Designed for heavy industrial manufacturing plants, this architecture eliminates batch-to-batch downtime, prevents thermal degradation, and preserves volatile aromatic profiles at scale.

 

Product Range & Performance Matrix

 

 

Model Series

Water Evaporation Rate (kg/h)

Heating Shelf Area (m2)

Primary Transport Drive

Target Industrial Application

CFD-300

50 - 80

30

Magnetic Coupled Belt

Specialty botanical extracts, premium pet food

CFD-600

100 - 150

65

Sealed Roller Chain / Screw

Instant coffee, soluble tea, dairy concentrates

CFD-1000

200 - 300

130

Multi-Tier Magnetic Drive

Bulk food ingredients, freeze-dried fruit chunks

CFD-Custom

Tailored (>300)

Engineered to spec

Custom Engineered

Integrated turnkey processing plants

 

Core Technical Specifications

 

 

Technical Parameter

Specification

Ultimate Chamber Pressure

< 10 Pa (Operational working band: 15 Pa - 50 Pa)

Condenser Temperature

Down to -75 C (Cascading refrigeration loop utilizing semi-hermetic screw compressors)

Shelf Temperature Range

-40 C to +120 C (Controlled via closed-loop silicone thermal fluid circulation)

Airlock Sealing Mechanism

Dual-chamber pneumatic slide gate valves integrated with automated gas-equalization bypass lines

Product-Contact Metallurgy

AISI 316L stainless steel (Structural support frame in AISI 304)

Surface Finishes

Mechanical ground and electro-polished to Ra <= 0.4 um on all product-facing zones

Control Architecture

Siemens S7-1500 PLC paired with WinCC SCADA; audit trail compatible with 21 CFR Part 11 requirements

Power Supply

380V / 415V, 3-phase, 50/60Hz (Custom factory voltages available upon request)

Cooling Water

15 C - 25 C supply at 0.3 - 0.4 MPa inlet pressure

Instrument Air

0.6 - 0.8 MPa, dry and oil-free supply

 

Industrial Applications

 

 

Food Processing: Industrial-scale instant coffee granules, tea extracts, sliced fruits, vegetables, and bulk military field rations.


Pet Nutrition: Continuous mass production of raw meat chunks, organ blocks, and functional nutritional treats.


Botanicals & Nutraceuticals: Heat-sensitive herbal extracts, high-purity phytochemical suspensions, and delicate biological slurries.


Chemical & Advanced Materials: Nano-structured catalysts, specialty polymers, and chemical intermediates requiring precise morphological preservation.

 

Engineering Selection Guide

 

 

Verify the following operational parameters to match the system configuration with your factory workflow:


Evaporation Load Calculation: Define total water mass to be removed per hour based on initial moisture content and target endpoint (kg H2O/h).


Thermal Collapse Threshold: Identify the eutectic point or collapse temperature of your specific feedstock to establish upper thermal limits for primary drying shelves.


Feedstock Rheology: Confirm whether the input material is a pumpable slurry, liquid concentrate, granulated pellet, or pre-cut solid profile. (Belt systems handle solid sheet/sliced matrices; rotary or screw airlocks handle free-flowing particulates).


Plant Utility Infrastructure: Verify local industrial substation capacity for high-amperage refrigeration compressors and thermal fluid heating loops.
Regulatory Compliance Standards: State whether cGMP (Pharmaceutical), 3-A / EHEDG (Food processing), or standard heavy industrial hygiene codes apply to your plant installation.

 

Customization & Engineering Options

 

 

Containment & Isolation Integration: O-RABS (Open Restricted Access Barrier Systems) or physical isolator integration for toxic or high-potency chemical compounds.


Downstream Processing Coupling: Vacuum-sealed hammer mills or sorting sieves directly coupled to the dry-product discharge airlock.


Energy Reclaim Loops: Heat recovery heat exchangers channeling refrigeration compressor discharge energy back into the thermal fluid heating loop.


Alternative Heating Mediums: High-pressure steam or high-temperature hot water (HTHW) utility integration modules.

 

Quality Control & Manufacturing Standards

 

 

Weld Integrity Verification: 100% X-ray radiography and liquid penetrant testing (PT) executed on all vacuum pressure vessel seams and internal cooling coils.


Pressure Vessel Compliance: Manufactured and certified under ASME U-Stamp or PED 2014/68/EU engineering guidelines.


Factory Acceptance Testing (FAT): 72-hour dry-run protocol testing vacuum hold time, maximum chamber leak rate (< 1 x 10^-3 Pa*m3/s), and shelf thermal uniformity (+/- 1 C).


Material Traceability: Mill Test Certificates (MTC Type 3.1) supplied for all pressure-retaining and product-contact metal components.

 

Packaging & International Logistics

 

 

Modular Shipping Layout: Main vacuum vessels segmented into modular transport units; refrigeration skids and control centers pre-mounted on rigid structural transport skids.


Corrosion & Moisture Defense: Vacuum ports sealed with blanking flanges and a pressurized nitrogen holding charge; electrical enclosures sealed in heavy-duty barrier foil with active desiccant packs.


Export Crate Engineering: ISPM 15-compliant fumigated wooden crates featuring vibration-damping bases and tilt/impact monitoring sensors.


Freight Coordination: Full support for Open-Top or Flat-Rack containerized ocean shipping under DDP, CIF, or FOB trade terms.

 

Technical Support & After-Sales Engineering

 

 

Commissioning & SAT Execution: On-site deployment supervised by senior mechanical and automation engineers to oversee mechanical alignment, vacuum leak-check verification, and Site Acceptance Testing.


Technical Training: Comprehensive on-site training for plant operators and maintenance crews covering recipe configuration, CIP execution, and sensor calibration.


Strategic Spare Parts Inventory: Critical wear components (vacuum pump shaft seals, pneumatic valve membranes, heat-transfer fluid pumps) warehoused for 48-hour global dispatch.


Remote Diagnostic Link: Integrated secure VPN router within the PLC cabinet enabling real-time remote diagnostics and software tuning by our engineering team.

 

Frequently Asked Questions

 

 

Q: How does the continuous airlock system prevent atmospheric air leakage into the main chamber?

A: The system utilizes a dual-gate pneumatic valve sequence separated by an intermediate gas-equalization chamber. Before the inner valve opens to the high-vacuum zone, the intermediate lock zone is evacuated to match chamber pressure, preventing pressure spikes and product oxidation.

Q: What is the specific energy consumption (SEC) of this continuous system?

A: By eliminating cyclical cooling and reheating of massive chamber walls, SEC ranges from 1.2 kWh to 1.8 kWh per kilogram of evaporated water, depending on the latent heat of the specific product and the utilization of compressor heat recovery loops.

Q: What is the standard manufacturing lead time?

A: Standard modular industrial systems require 20 - 26 weeks from engineering drawing sign-off. Turnkey integrated lines range from 32 - 40 weeks depending on pressure vessel code review cycles.

Q: Is Clean-in-Place (CIP) fully automated?

A: Yes. High-impact rotary spray balls and automated sanitary valve manifolds allow complete CIP and SIP execution without manual dismantling of internal product-transport components.

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