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High-purity green hydrogen generation systems tailored for Vietnamese renewable energy coupling, green chemical production, and industrial power.
Advanced chemical absorption and decarbonization units delivering >98% biomethane purity for compressed natural gas (Bio-CNG) vehicle fuel.
Complete modular skid combining biological H₂S roughing, deep chemical polish, condensation cooling, and particulate filtration.
Turnkey turnkey EPC desulfurization engineering protecting CHP generators and boilers across Tay Ninh, Dong Nai, and the Mekong Delta.
Under Vietnam's National Power Development Plan VIII (PDP8) and commitments to reach Net Zero emissions by 2050, the country is witnessing an unprecedented transition from raw biogas flaring to high-value biomethane utilization and green power generation.
Vietnam's rapid industrialization and agricultural intensification have generated substantial organic waste streams. Key manufacturing sectors—such as cassava starch processing in Tay Ninh, Binh Phuoc, and Gia Lai provinces, rubber latex processing, palm oil extraction, swine farming complexes in Dong Nai and the Red River Delta, and municipal wastewater treatment facilities in Ho Chi Minh City and Hanoi—produce millions of cubic meters of biogas daily via anaerobic digestion (covered lagoons, CSTR, and UASB reactors).
However, raw biogas generated from these tropical feedstocks typically carries extremely aggressive hydrogen sulfide (H₂S) concentrations ranging from 1,500 ppm to upwards of 15,000 ppm (1.5% by volume). When combusted directly in boilers or combined heat and power (CHP) gas engines, untreated H₂S converts into highly corrosive sulfur dioxide (SO₂) and sulfurous acid (H₂SO₃), leading to catastrophic cylinder pitting, rapid lubricating oil acidification, heat exchanger clogging, and severe particulate atmospheric violations under Vietnamese environmental standards (QCVN 19:2009/BTNMT and QCVN 05:2023/BTNMT).
Tropical environmental factors in Vietnam—notably ambient temperatures exceeding 38°C and relative humidity sustaining >85% throughout the monsoon season—cause rapid catalyst poisoning, excessive bed compaction, and extreme microbial temperature fluctuations in substandard desulfurization setups. Huayan designs ruggedized desulfurization skids specifically engineered for tropical high-humidity environments with automated PLC moisture tracking and heat balancing.
To meet distinct operational budgets, space limits, and sulfur loadings across Vietnamese manufacturing estates, Huayan supplies three primary technological configurations:
Ideal for low-to-medium flow rates and terminal polishing before CHP engines and membrane upgrading. Utilizing multi-tier iron oxide (Fe₂O₃·H₂O) media with radial air distribution grids, achieving outlet H₂S concentrations below < 1 ppm. Features dual-vessel lead-lag valve piping for seamless media exchange without shutting down factory operations.
Designed for high-concentration sulfur streams (>5,000 ppm) prevalent in Vietnamese cassava starch and wastewater lagoons. Utilizes chelated iron catalytic absorption or continuous NaOH neutralization towers to wash out H₂S, followed by atmospheric regeneration yielding elemental sulfur cakes, minimizing operating chemical consumable costs.
The lowest OPEX solution for large-scale agricultural digesters in Vietnam. Thiobacillus-dominant biofilms convert H₂S into elemental sulfur and harmless sulfates under strictly regulated micro-aeration and nutrient dosing without hazardous chemical handling.
Integrated chilled water heat exchangers reduce gas temperature to 4°C, knocking out 99% of entrained moisture before passing through deep siloxane-selective carbon guards, extending Vietnamese gas engine overhaul intervals from 2,000 hours to over 15,000 hours.
Our custom desulfurization installations across Vietnam address demanding geographic and operational requirements:
| Parameters | Dry Scrubber Series (HDS-D) | Wet Chemical Scrubber (HDS-W) | Biological Trickling (HDS-B) | Hybrid Turnkey System (HDS-Pro) |
|---|---|---|---|---|
| Inlet H₂S Concentration | 100 – 3,000 ppm | 2,000 – 20,000 ppm | 1,000 – 10,000 ppm | 500 – 25,000 ppm |
| H₂S Removal Efficiency | > 99.5% (down to <1 ppm) | 95.0% – 99.0% | 90.0% – 98.0% | > 99.9% (Continuous) |
| Gas Flow Capacity (Nm³/h) | 50 – 5,000 Nm³/h | 300 – 15,000 Nm³/h | 200 – 10,000 Nm³/h | 100 – 30,000+ Nm³/h |
| Vessel Material Options | SS304 / SS316L / FRP / Carbon Steel + Epoxy | FRP / SS316L / PPH | FRP / Dual-Laminate Composite | SS316L / Specialized Anti-Corrosion Alloys |
| Operating Temperature | Ambient (0°C – 60°C) | 15°C – 55°C | 25°C – 42°C (Optimal for Vietnam) | 0°C – 65°C Auto-Controlled |
| Control System | Siemens PLC / Touch HMI / Cloud IoT | Full Auto pH & ORP Dosing PLC | Automated Nutrients & O₂ Dosing | SCADA / Remote Cloud Monitoring |
With excellent products and service, to become the world famous brand of exports.
Explore our 90,000+ ㎡ intelligent manufacturing workshops, pressure vessel testing lines, and ISO-certified assembly centers online.
Manufacturing Experience
Invention Patents
Factory Area
Export Destinations
Decades of continuous engineering breakthroughs in gas compression, separation, and purification technologies.
French, Belgian investment in China to build the Longhai railway, established the Xuzhou Longhai railway locomotives locomotive repair factory.
China Railway Army Engineering Department took over the establishment of the People's Liberation Army Railway Corps mechanical repair factory.
It was renamed the PLA 6414 Factory and manufactured China's pioneering industrial air compressor system.
The first high-pressure diaphragm compressor was successfully designed, engineered, and brought to industrial market.
The company expanded its scale, relocating to No. 99 Yangshan Road, Xuzhou Economic Development Zone, heavily upgrading high-precision fabrication lines.
Establishment of Xuzhou Huayan Group, consolidating gas separation, energy engineering, and international export subsidiaries.
The company expanded into a brand-new self-owned smart office & digital engineering complex, scaling global service teams across Southeast Asia.
Long-term academic and R&D cooperation with China University of Mining and Technology and Xi'an Jiaotong University.
We are masters of gas extraction, offering a full spectrum of solutions from PSA/VPSA nitrogen and oxygen generators for industrial use to large-scale cryogenic air separation units for high-purity, high-volume production in Vietnam's manufacturing parks.
We provide reliable power solutions for any scenario, including robust diesel generators for prime or backup power and efficient CNG/biogas generators for clean energy applications in Vietnamese remote operations.
Our expertise extends to the entire gas value chain. We design and build advanced systems for natural gas processing, LNG plants, helium extraction, and carbon capture (CCUS), helping clients optimize resources and meet environmental targets.
From heavy defense and petrochemical complexes to renewable agriculture, our gas equipment delivers unwavering performance.
High-reliability tactical gas compression and high-pressure purification systems meeting stringent military defense standards.
Ultra-pure nitrogen, helium recovery, and oxygen delivery systems engineered for extreme flight test environments.
Zero-leakage diaphragm compression and safety-grade inert gas containment skids for nuclear utilities.
Inert blanketing for reactors, pipeline/vessel purging, nitrogen drilling, and displacement in oil & gas fields across Vietnam.
Technical considerations, maintenance schedules, and equipment selection guidelines for project managers in Vietnam.
All our outdoor vessels are constructed with SS304/SS316L stainless steel or corrosion-resistant FRP composites with UV-protective polyurethane coatings. Electrical control enclosures feature IP65 tropicalized sealing, anti-condensation space heaters, and automated gas pre-cooling skids to eliminate water condensation inside media beds.
Leading gas engine manufacturers (Jenbacher, MWM, Caterpillar, Cummins) mandate maximum H₂S levels below 100 – 200 ppm (with many recommending < 50 ppm) to prevent rapid acid degradation of synthetic engine oils and valve corrosion. Huayan systems consistently maintain outlet levels below 10 ppm.
Yes. We supply integrated skids combining deep H₂S removal (<1 ppm), siloxane elimination, water dew point suppression (< -40°C), and CO₂ membrane / chemical amine wash to produce high-purity biomethane (>98% CH₄) matching standard compressed natural gas specifications.
Standard modular skid systems are manufactured and factory-tested within 45 to 60 days. Our specialized field commissioning engineers provide on-site installation guidance, supervisor testing, and operator training directly at client facilities throughout Vietnam.
Comprehensive product series engineered by Huayan Energy for industrial gas separation, purification, and decentralized power generation.
Field gathering, high-pressure separation, acid gas removal, and dehydration engineering for gas exploration blocks.
Turnkey turnkey biogas biological and chemical scrubbers for Vietnamese cassava, livestock, and municipal projects.
Flue gas CO₂ capture, helium extraction, VOC treatment, and high-purity noble gas processing units.
High-efficiency on-site N₂ production systems with 95%–99.999% purity for chemical and electronics manufacturing.
Robust on-site O₂ systems designed for aquaculture aerating in the Mekong Delta, metallurgy, and hospital medical gas.
High-reliability green hydrogen electrolyzers and methanol cracking units for zero-carbon industrial applications.
Large tonnage liquid oxygen, liquid nitrogen, and liquid argon ASU plants for steel mills and gas distributors in Vietnam.
Clean natural gas power generation sets and heavy-duty diesel gensets ensuring uninterruptible power supply for factories.
Building reliable industrial gas infrastructure with world-class international partners.
