DP -70°C Control
DHU Desiccant Dehumidifier
Ultra-low dew point dual-rotor engineering delivering continuous atmospheric moisture scavenging for high-precision battery dry rooms.
Flagship Equipment Showcase
Engineered Low Dew Point & Emission Abatement Lineup
Continuous industrial-grade dehumidification and closed-loop environmental solutions deployed in high-spec automated manufacturing hubs globally.
DP -70°C Control
Turnkey EPC
Turn-key Dry Room System
End-to-end controlled atmospheric enclosure with integrated AHU, air filtration, hermetic wall seals, and multi-stage dehumidification validation.
≥99% Efficiency
NMP Recovery System
Recovers volatile N-Methyl-2-pyrrolidone solvent from electrode coating ovens, drastically lowering VOC operational liabilities and recycling materials.
Cooling + RTO
VOC Abatement System
Cryogenic deep-cooling condensation combined with regenerative thermal oxidizer modules to scrub exhaust streams down to stringent limits.
High COP
Refrigerative Dehumidifier
High-efficiency mechanical condensation systems optimized for pre-cooling stages, logistics warehousing, and baseline moisture reduction.
Gigafactory Grade
Modular Cell Assembly Rooms
Engineered for electrolyte filling and sealing zones requiring class 10,000 cleanroom performance matched with continuous dew point stability.
Purity >99.5%
Closed-Loop NMP Distillation
Thermal condensation units tailored for cathode slurrying lines, yielding reclaimed grade solvent without secondary environmental processing fees.
Zeolite Rotor
Zeolite Wheel VOC Concentrator
High-volume, low-concentration exhaust gas treatment utilizing hydrophobic synthetic zeolite wheels with thermal catalytic oxidizers.
Industrial White Paper
Engineering Principles of Rotary Desiccant Wheel Dehumidification
Hangzhou DryAir Treatment Co., Ltd. analyzes the thermodynamics of moisture capture, solid desiccant sorption matrices, and life-cycle operational expenditure in high-precision processing.
Sorption Kinetics & Matrix Chemistry
Unlike mechanical refrigeration that reaches saturation limits at ~4°C to prevent coil frost, our synthesized silica gel and molecular sieve corrugated rotors directly adsorb water molecules through microscopic capillary condensation, achieving supply air dew points down to -70°C reliably across 24/7 operating cycles.
Thermal Regeneration Dynamics
Moisture removal is continuous: the rotor rotates slowly between process and reactivation sectors. Low-temperature reactivation air or direct-fired gas modules drive vapor off the desiccant beds. Advanced heat exchangers recycle waste heat from condensation or plant steam, slashing HVAC parasitic power by up to 35%.
Leakage Mitigation & Differential Seals
Ultra-low dew points fail if air bypasses desiccant wheels. DryAir integrates proprietary high-temperature perimeter and radial seals designed with dynamic self-tensioning springs, eliminating cross-contamination between reactivation air and process supply streams under negative differential static pressures.
Critical Local Application Scenarios
Precision Micro-Climates Where Moisture Degradation Is Fatal
Targeted industrial engineering engineered around the material chemistry and yield thresholds of regulated manufacturing.
Lithium-Ion & Solid-State Batteries
Exposure of active cathode materials (such as NMC/LFP) and non-aqueous electrolytes to ambient water vapor creates hydrofluoric acid (HF), leading to capacity fading, internal short circuits, and pack fires. DryAir systems maintain electrolyte filling, vacuum sealing, and formation dry rooms between -40°C and -70°C dew point.
Pharmaceuticals & Gelatin Processing
Hygroscopic compounds, effervescent tablets, diagnostic test strips, and soft gelatin capsules lose structural stability or degrade chemically under unstable humidity. Our systems safeguard cGMP production suites, tablet coating pans, and fluid bed dryers at precise 10% to 25% RH levels.
Defense & Aerospace Storage (GJB Certified)
Manufactured strictly according to the GJB national military standard, DryAir units control unheated warehouses, missile guidance calibration centers, and radar bays, inhibiting electrochemical corrosion on avionics, explosive charges, and precision alloy armaments below 40% RH indefinitely.
Manufacturing Resiliency
China Factory Supply Chain Resiliency & Production Efficiency
Operating from the Qingshan Industrial Park in Hangzhou, DryAir leverages deep industrial cluster integration to compress project lead times and guarantee high quality.
4–8 Week Lead Time
While European and American suppliers experience extended 24–40 week backlogs, our vertical fabrication facility produces over 200 large-tonnage units monthly, matching rapid gigafactory buildouts.
Full Tier-1 Supply Control
From high-temperature silicon seals and customized titanium-alloy fans to PLC automation suites (Siemens, Schneider, Allen-Bradley), our multi-sourced supply chain mitigates single-source operational vulnerabilities.
In-House Testing Facility
Every unit undergoes strict psychrometric chamber testing before export. We simulate tropical 40°C / 95% RH ambient inlet conditions to guarantee performance at target dew points prior to leaving the facility floor.
74 In-House Specialists
Our research and operational footprint includes 6 staff with Master's or PhD degrees, 2 national registered HVAC engineers, 8 senior engineers, and 58 specialized technicians managing quality across all units.
Technical Selection Guide
Process Requirement vs. Recommended Technology Configuration
Accurate psychrometric specification prevents over-engineering Capex while eliminating moisture contamination risks during line ramp-up.
| Application & Industrial Process | Target Moisture / Emission Spec | System Architecture Recommendation | Primary Energy / Regeneration Vector |
|---|---|---|---|
| Lithium Battery Cell Assembly & Electrolyte Filling | -40°C to -60°C Dew Point | Turn-key Integrated Dry Room System (DHU + Hermetic Enclosure) | Direct Steam / Electrical / Gas Thermal Regeneration |
| Solid-State & Next-Gen Lithium Metal Cells | Down to -70°C Dew Point | Multi-Stage Dual Rotor Desiccant Dehumidifier Series | High-Temperature Reactivation with Chilled Glycol Pre-cooling |
| Cathode Electrode Coater Dryer Exhaust | ≥99% NMP Recovery Rate | Closed-Loop Condensation + Zeolite Molecular Scrubber | Deep Cryogenic Glycol Heat Recovery Exchangers |
| Hygroscopic Pharma Powders & Gelatin Blistering | 10% – 30% Relative Humidity | Desiccant Dehumidification Unit with High-Grade HEPA Stages | Hot Water / Steam Heat Recovery Regenerative Coils |
| Military Equipment & Guided Ordnance Storage | ≤40% RH (GJB Compliant) | Modular Stationary Desiccant Environmental Air Purge Unit | Low-Wattage Heat Pump Regeneration Modules |
| Raw Material Bulk Storage & Electronics Warehousing | 45% – 60% Relative Humidity | Industrial Refrigerative Condensation Dehumidifier Units | Direct Expansion R410A / R134a Compressor Heat Rejection |
| Bulk Fuel Terminal & Solvent Exhaust Treatment | Strict EPA / VOC Emission Caps | Deep-Cooling Condensation combined with RTO Incineration | Self-Sustaining Regenerative Thermal Combustion |
ISO 9001 & GJB Quality Assurance
Five-Stage Turnkey Engineering Delivery Protocol
Single-source technical responsibility mitigates project interface risks between cleanroom installers, HVAC contractors, and controls providers.
Stage 01
Psychrometric Consulting
Calculation of sensible heat, internal latent loads from personnel, equipment exfiltration, and building envelope vapor permeation using digital airflow modeling.
Stage 02
Integrated Engineering
3D BIM layout design of rotor casing, fan static matching, chilled water/glycol loops, regenerative thermal systems, and PLC control system schematics.
Stage 03
In-House Fabrication
Sheet metal CNC punching, stainless casing fabrication, rotor installation, wiring integration, and pre-shipment dew point validation in performance test cells.
Stage 04
Installation & Commissioning
On-site equipment positioning, duct installation, airtight envelope assembly, balancing, and multi-point moisture load testing under full production loads.
Stage 05
Lifecycle Maintenance
Remote telemetry diagnostics, factory-direct spare desiccant rotor delivery, filter replacements, and optional 2-year overseas technical support agreements.
Next-Generation R&D
Technology Roadmap & Sustainable Dehumidification Horizons
Leading the transition toward decarbonized dry rooms, waste-heat-driven regeneration matrices, and smart adaptive algorithms.
AI Predictive Dew-Point Tuning
Traditional systems operate on fixed reactivation setpoints. DryAir is integrating neural network-based predictive control algorithms that monitor ambient weather variations and plant production shifts, dynamic modulating regeneration heaters to achieve 18–22% lower average energy consumption.
Low-Grade Waste-Heat Reactivation
Our upcoming generation of desiccant matrices utilizes modified Metal-Organic Frameworks (MOFs) and high-density functional zeolites capable of full desorption regeneration using low-grade industrial waste heat (hot water as low as 65°C–80°C), slashing direct fossil-fuel emissions.
Zero-GWP Green Refrigerants
In accordance with the Kigali Amendment and EU F-gas regulations, DryAir is redesigning pre-cooling refrigeration units to use low-GWP refrigerants (R454B, R513A) and natural fluids like CO2 (R744), future-proofing plant operational licenses globally.
Global Compliance
Localized Global Support & Jurisdictional Certification
International project delivery backed by rigorous electrical, mechanical, and safety certifications for European, North American, and Asian gigafactories.
UL 1995 & CSA C22.2
Fully compliant electrical control panels, dual-voltage power integration, and North American safety listings for fast-track permit validation in US and Canadian industrial corridors.
CE Machinery Directive
Full CE certification encompassing Machinery Directive 2006/42/EC, Low Voltage Directive (LVD), and EMC compliance for seamless deployment throughout European Union industrial installations.
ASME Pressure Vessel Code
Condensers, distillation columns, and heat exchangers built to rigorous ASME Section VIII pressure boundary compliance, ensuring safety on high-pressure VOC and solvent lines.
EAC Customs Union
Certified conforming to the Technical Regulations of the Eurasian Customs Union (TR CU), facilitating rapid customs clearance and operation across member states without field modifications.
Expert Knowledge Base
Frequently Asked Questions by Industrial HVAC Engineers
In-depth technical answers addressing dew point selection, regeneration efficiencies, international commissioning, and system maintenance.
What is the absolute lowest dew point achievable with DryAir desiccant equipment?
DryAir rotary desiccant dehumidifiers reliably achieve supply air conditions down to a continuous -70°C dew point (equivalent to <0.003 g/kg moisture content). This performance is achieved through multi-stage dual-rotor configurations combined with deep chilled water pre-cooling coils, ideal for next-generation solid-state lithium cells and high-voltage electrolyte filling operations.
How does DryAir ensure turnkey installation quality for overseas gigafactories?
We deliver complete EPC solutions internationally—from preliminary computational psychrometric design to final balance validation. We deploy bilingual on-site commissioning engineers to work alongside local mechanical contractors, having successfully completed projects for global customers including Tesla, Northvolt, and TTI across North America and Europe.
Which thermal regeneration options can be configured for rotor reactivation?
Depending on local utility costs and plant thermal infrastructure, DryAir units can be engineered with direct electric heaters, medium-to-high pressure steam coils, direct/indirect gas-fired burners, or closed-loop thermal oil heat exchangers. Waste-heat recovery modules can also be integrated to minimize operational expenses.
How does the ZJRH NMP Recovery System achieve ≥99% solvent capture rates?
Our NMP recovery systems use multi-stage counterflow condensation combined with hydrophobic zeolite concentration modules. The system cleans exhaust streams from battery cathode coating ovens down to compliant emission levels (<5 mg/m³), recycling ultra-pure liquid NMP back to the plant and lowering raw solvent spend.
What is the typical operating service life of a DryAir desiccant rotor matrix?
Under regular maintenance protocols and correct filtration (maintaining G4 + F7 pre-filtration), our synthetic silica gel and molecular sieve corrugated rotors deliver an operational lifespan of 10 to 12 years. Rotors are washable with neutral detergents if contaminated by light organic dust, restoring original moisture uptake capacity.
What international warranty and technical service support does DryAir provide?
DryAir provides a standard factory warranty alongside an optional 2-year extended international lifecycle support agreement. This includes 24/7 remote IoT telemetry diagnostic support, worldwide dispatch of field engineers, and dedicated spare parts depots ensuring rapid response for overseas production facilities.
Industrial Systems Catalog
Explore DryAir's Complete Industrial Product Portfolio
From single standard dehumidification units to large-scale multi-rotor air management setups for high-throughput production lines.
DHU Series
Rotary Desiccant Dehumidifiers
Continuous moisture extraction engineered to maintain sub-zero dew points across mission-critical cleanrooms and automated packaging environments.
Turn-key Cleanroom
Complete Dry Room Engineering
Turnkey environmental solutions integrating hermetic insulated enclosures, air handlers, low-leakage dampers, and precision monitoring arrays.
Solvent Recycling
NMP Solvent Recovery Plant
Recovers volatile N-Methyl-2-pyrrolidone solvent from electrode coating exhaust, cutting raw chemical consumption and operational costs.
RTO Emission Control
Industrial VOC Abatement Plants
Advanced regenerative thermal oxidation combined with cryogenic chilling stages for high-volume, continuous industrial exhaust scrubbers.
Pre-Cooling Stage
Industrial Refrigerative Units
Mechanical direct-expansion refrigeration units optimized for warehouse humidity balance and pre-treatment ahead of desiccant wheels.
Factory Direct
Custom Modular AHU Cabinets
Thermal-break aluminum framework enclosures with double-skin PU insulation panels, preventing external casing condensation in humid climates.
cGMP Class A/B
Pharma cGMP Moisture Systems
Sanitary-grade desiccant air handling units built with internal wash-down designs, microbial filters, and integrated BMS automation networks.
Global Engineering
Turnkey Gigafactory Infrastructure
Comprehensive multi-megawatt moisture abatement infrastructure for multi-gigawatt cell manufacturing projects worldwide.
Direct Technical Consultation
Ready to Engineer Your Low Dew Point Dry Room?
Provide your layout specifications, latent moisture loads, and supply target dew points. Our senior HVAC engineering team will return a customized psychrometric mass balance assessment within one business day.