Pre-engineered psychrometric modules designed for extreme moisture deprivation, gigafactory endurance, and mission-critical chemical recovery. Verified by Hangzhou DryAir Treatment Co., Ltd.
Dew Point: -70°C
Ultra-low dew point DHU series rotor built with synthesized molecular sieve honeycomb geometry, preventing moisture ingress in cell winding.
Gigafactory EPC
Comprehensive airtight architectural enclosure, deep dehumidification AHUs, precise laminar air delivery, and digital SCADA monitoring.
Recovery: ≥99%
ZJRH series dual-condenser and desiccant wheel setup capturing high-temp NMP solvent fumes from cathode coating drying tunnels.
RTO + Deep Chilling
Multi-stage deep chilling condensation integrated with regenerative thermal oxidizers (RTO) for chemical, coating, and electronics facilities.
Twin Rotor Cascade
Series-staged double big-wheel construction achieving -65°C to -70°C dew point supply air under high latent ambient summer conditions.
GMP / GJB Compliant
Sanitary double-skin casing with thermal break design, tailored for tablet pressing, soft gelatin encapsulation, and effervescent packaging.
Energy Efficient DX
High-COP compressorized direct-expansion refrigeration units built for bulk moisture elimination upstream of desiccant wheels or warehousing.
Petrochem Vapor Abatement
Specialized cryogenic condensation modules designed for volatile hydrocarbon retention, bulk fuel marine terminals, and refinery transfers.
In modern gigawatt-scale battery cell production and advanced semiconductor fabrication, atmospheric moisture is not simply an environmental parameter—it is an active chemical contaminant. A single water molecule (H₂O) interacting with lithium hexafluorophosphate (LiPF₆) electrolyte triggers a catastrophic hydrolysis chain reaction, forming corrosive hydrofluoric acid (HF) that compromises cathode structures and creates lethal thermal runaway risks.
To hold relative humidity below 0.5% (equivalent to a supply air dew point of -50°C to -70°C), traditional chilled-water coil dehumidification fails due to rapid ice frosting below 0°C. The China Big Wheel Dehumidifier overcomes thermodynamic limits through a massive, continuously rotating desiccant wheel (rotor) packed with inorganic silica gel or synthesized 3Å/4Å molecular sieve honeycombed flutes. Spanning rotor diameters from 1,200 mm to over 4,500 mm, these big-wheel machines process up to 120,000 m³/h in a single chassis, acting as the fundamental respiratory system for billion-dollar clean manufacturing facilities worldwide.
The convergence of the world's most aggressive lithium battery supply cluster, raw material availability, and extreme industrial manufacturing speeds.
Unlike Western packaging firms that outsource sheet metal fabrication, refrigeration coils, and rotor synthesis to dispersed third parties, Hangzhou DryAir operates an end-to-end industrial production base in Qingshan Industrial Park, Lin'an, Hangzhou.
From laser cutting of 2.0mm galvanized steel casings and CNC automated foaming of thermal-break paneling, to in-house rotor frame machining and testing laboratories, vertical ownership mitigates supply bottlenecks.
China is home to greater than 70% of global lithium cell processing capacity. The operational robustness of Hangzhou DryAir big wheel machines has been proven under non-stop 24/7/365 production schedules for sector heavyweights including CATL, BYD, ATL, EVE Energy, SVOLT, and Envision AESC.
Every edge case—from air seal erosion under abrasive solvent vapors to sudden regeneration blower shutdowns—has been engineered out of the machinery through real-world deployment data.
Overseas equipment manufacturers often quote 36 to 52 weeks for custom-engineered rotary dehumidifiers exceeding 50,000 m³/h. DryAir delivers high-capacity big wheel units in 12 to 16 weeks, backed by standard assembly cell buffers and 200+ unit monthly capacity.
This industrial velocity allows gigafactory contractors to meet compressed commercial operation deadlines (COD) without sacrificing psychrometric safety margins or build quality.
A rigorous psychrometric guideline for international plant directors, cleanroom consultants, and HVAC procurement leads when submitting RFQs.
| Target Application & Industrial Process | Standard Moisture Tolerance | Supply Dew Point (DP) Target | Typical Wheel Configuration | Recommended System Solution |
|---|---|---|---|---|
| Solid-State & Next-Gen Lithium-Metal Cells Pure lithium foil anode bonding & sulfide solid electrolyte |
Moisture < 10 ppm (v) | -65°C to -70°C DP | Twin-Rotor Cascade (Molecular Sieve 4Å) | Desiccant System |
| Commercial Li-ion Cell Winding & Filling NMC / LFP prismatic, cylindrical & pouch battery assembly |
RH < 0.5% @ 22°C | -40°C to -60°C DP | Big Wheel Single Rotor with Pre-Cooling Coil | Turnkey Dry Room |
| Electrode Cathode Slurry & Coating Lines High-speed hot air drying with toxic NMP solvent fumes |
VOC stack compliance | ≥99% NMP Recovery | Multi-stage condensation with regenerative zeolite rotor | NMP Recovery |
| Pharmaceutical Effervescent & Dry Powders Tableting, dry powder inhalers (DPI), gelatin capsule shell rooms |
RH 10% – 20% @ 20°C | -15°C to -25°C DP | Silica Gel Synthetic Wheel + HEPA Cleanroom Module | Desiccant Module |
| Military Avionics & Ordnance Ammunition Bunkers Long-term tactical storage, missile propellant defense silos |
RH ≤ 35% – 40% | -5°C to -10°C DP | Standard DHU Series with Direct Electric Reactivation | Ordnance Dehumidifier |
| Industrial Bulk Raw Chemical Warehousing Pre-cooling, general dry bulk packaging, grain preservation |
RH 45% – 60% @ ambient | +5°C to +10°C DP | DX Refrigerative Dehumidification Coil Chiller | Refrigerative Unit |
| Petrochemical Vapor Terminals & Paint Workshops Hydrocarbon vapors, benzene/toluene/xylene emission mitigation |
Local EPA limits | Deep Chilled -75°C | Cryogenic condensing unit paired with regenerative thermal oxidizer | VOC Abatement |
Removing cross-border installation hurdles through verified compliance with European, North American, Eurasian, and Military Defense standards.
Full European conformity including Low Voltage Directive (LVD) and Electromagnetic Compatibility (EMC). Rigorous dual-circuit safety interlocks and emergency stop compliance across all big wheel motor drives.
European Union ValidatedCustom control panels designed for North American industrial standards. Built with UL-certified breakers, contactors, and programmable logic controllers (Allen Bradley / Siemens) rated for NFPA 79 industrial machinery.
USA & Canada CompliantPressure vessels, regeneration steam heat exchangers, and cryogenic cooling manifolds manufactured and stamped in strict alignment with ASME boiler and pressure vessel codes for leak-free high-pressure cycles.
ASME Pressure StampedHangzhou DryAir holds the rigorous GJB national military standard certification in China, ensuring ultra-tight vibration, shock, and corrosion resistance. EAC TR CU 010 and 004 certifications cover Eurasian economic territories.
GJB Defense & EAC EurasianHow next-generation desiccant chemistry and AI thermodynamic modeling are slashing gigafactory operational costs.
Traditional rotors demand 130°C to 160°C reactivation heat. New modified mesoporous silica polymers regenerate at 75°C to 85°C, unlocking the use of industrial low-grade waste hot water and high-COP heat pumps.
On-board machine learning algorithms continuously assess outdoor ambient weather conditions, personnel shift schedules, and room leakage rates to dynamically modulate rotor RPM and reactivation heat.
The global transition to all-solid-state lithium batteries requires continuous dry room supply dew points below -70°C (less than 1.5 ppmv). Modern big wheel units integrate sub-zero deep-chilling cascades to meet this standard.
Integrating big wheel desiccant systems with closed-loop cathode coater exhaust recovery achieves ≥99% NMP recovery while reusing coater sensible exhaust heat directly within desiccant reactivation air circuits.
Equipped with high-efficiency air-to-air plate heat exchangers and heat pipe recovery loops across reactivation exhaust corridors, overall plant thermal energy consumption is reduced by upwards of 35%.
A structured project lifecycle ensuring zero dew point deviations from initial psychrometric calculation to final site acceptance testing (SAT).
Exhaustive simulation of process sensible/latent loads, door openings, personnel headcounts, structural infiltration, and ambient climate weather archives.
Selection of big wheel rotor diameter, face velocity, flute matrix density, reactivation power source, and coil staging in 3D BIM/Revit software.
Precision CNC sheet fabrication, anti-corrosion coating, and full-load validation inside Hangzhou DryAir's performance testing chamber before export crating.
Dispatched Senior Field Engineers lead on-site assembly, duct pressure leakage testing, pneumatic balancing, and SCADA control calibration.
Continuous remote monitoring, guaranteed spare parts inventory, and optional 2-year full-coverage international service agreements.
Critical manufacturing environments requiring unwavering psychrometric control and cleanroom-grade airborne molecular filtration.
Covers electrode slitting, winding, stacking, electrolyte filling, and vacuum degas zones. Holding ambient dew point at -45°C to -60°C ensures that electrolyte does not decompose into toxic HF gas, directly protecting pouch and prismatic cell energy density.
Hygroscopic active pharmaceutical ingredients (APIs), effervescent oral solids, and hard gelatin capsule manufacturing require constant 15% to 20% relative humidity. Eliminates tablet sticking in rotary press dies and prevents capsule deformation.
Engineered under national GJB military standards for long-term weapon readiness, naval vessel mothballing, missile propellant protection, and radar avionics preservation. Prevents micro-galvanic corrosion and pyrotechnic oxidizer clumping.
Detailed technical answers addressing dew point stability, energy recovery, cross-contamination, and on-site overseas validation.
Peer-reviewed technical analyses, system failure case studies, and psychrometric optimization protocols directly from our R&D directors.
An engineering breakdown of multi-stage mechanical refrigeration and condensation coils for mitigating hydrocarbon emissions during bulk liquid transfer.
Read Technical Paper
Preventing condensation coil fouling, managing fluctuating solvent evaporation loads, and maximizing latent heat recycling into secondary air streams.
Read Technical Paper
How micro-humidity variations affect powder cohesion, dissolution rates, and gelatin shell brittleness, with psychrometric cleanroom layout guidelines.
Read Technical PaperShortlist pre-engineered standard modules or request custom engineering from China's leading big wheel manufacturer.
DHU-Ultra Series
Primary supply air AHU with integrated big wheel rotor, low-leakage bypass dampers, and pre-cooling glycol coils for battery cleanrooms.
Airtight Cleanroom
Modular rockwool/polyurethane insulated enclosure panels with airtight gasket systems, stainless steel plenum returns, and HEPA filtration.
Solvent Purification
Directly interfaces with coater drying zones, stripping gaseous NMP vapors and outputting industrial grade liquid solvent ready for fractional reuse.
EPA / CE Compliant
Deep-cooling condensation coupled with 3-bed regenerative thermal oxidizers (RTO) delivering 99.5%+ destruction removal efficiency of toxic fumes.
Dual Stage Cascade
Primary silica gel wheel extracts bulk moisture; secondary molecular sieve wheel draws dew points down to -70°C in high-humidity tropical climates.
Refrigerant DX
Scroll-compressor driven direct expansion refrigeration packages engineered for moisture control in logistics hubs, archival vaults, and pre-cooling AHUs.
GJB Defense Validated
Built to survive extreme salt-spray corrosive environments with marine-grade 316 stainless hardware, vibration isolators, and heavy-duty blowers.
Deep Chilling
Multi-cascade deep-chilled vapor condensers intercepting bulk volatile hydrocarbons at chemical loading racks and port tank farm terminals.
Whether you are establishing a 30 GWh battery gigafactory, renovating an API synthesis packaging suite, or commissioning explosive VOC vapor abatement, Hangzhou DryAir's 74-member engineering department will calculate your moisture mass balance and deliver a certified system layout within 24 business hours.
Hangzhou DryAir Treatment Co., Ltd.
No. 2088 Keji Road, Qingshan Industrial Park, Lin'an, Hangzhou, Zhejiang Province, 311305, P.R. China
Direct Phone: +86-571-8990-5557
Engineering Email: [email protected]
