Pre-engineered, skid-mounted, and vehicle-mounted modular setups engineered to comply with Nordic safety regulations and European emission criteria.
Highly maneuverable, skid-mounted cryogenic plants enabling remote biomethane liquefaction across Denmark's agricultural hubs.
Learn More
Fully integrated, relocatable high-temperature steam sterilization systems designed for regional hospitals and healthcare hubs.
Learn More
Total optimization and low-OPEX processing systems optimized for Denmark's off-grid biogas upgraded streams.
Learn More
High-capacity H2S scrubbing setups ensuring ultra-clean feed gas before entry into cryogenic liquefaction units.
Learn MoreAnalyzing the paradigm shift in the Danish gas network: Transitioning from North Sea fossil gas to decentralized Liquefied Biogas (LBG).
Denmark is leading the global green transition. According to the Danish Energy Agency (Energistyrelsen), biogas production has seen exponential growth, aiming to cover 100% of the Danish gas consumption by 2030. While a significant portion of this biomethane is injected directly into the transmission grid, physical pipeline infrastructure cannot economically reach every agricultural facility, offshore island, or industrial zone. This is where truck-mounted and skid-mounted Liquefied Natural Gas (LNG) / Liquefied Biogas (LBG) plants play a crucial role.
For decentralized agricultural biogas cooperatives in regions such as Jutland (Jylland) or Funen (Fyn), liquefying upgraded biomethane directly at the source changes the logistics model. By converting gaseous methane into LBG at cryogenic temperatures (-162°C), volume is reduced by a factor of 600. This enables efficient road transportation to marine refueling stations in major Danish ports (e.g., Esbjerg, Aarhus, Copenhagen) or to heavy-duty transport corridors where liquid gas replaces diesel.
When the local grid capacity is maxed out during high-production summer months, skid-mounted liquefaction provides a crucial alternative. Instead of curtailing biogas upgrading facilities, operators can liquefy excess biomethane and store it on-site.
Our systems are designed to fully support ATEX Zone 1/Zone 2 requirements and meet the demanding standards set by the Danish Working Environment Authority (Arbejdstilsynet) and Denmark’s Environmental Protection Agency (Miljøstyrelsen).
Combining world-class academic cryogenic research with robust, industrial-scale pressure vessel and liquefaction manufacturing.
PhD from the Institute of Physics and Chemistry Technology, Chinese Academy of Sciences (CAS). Recognized national senior engineer who has led state-level thermodynamic projects and received the Beijing Science and Technology Award for advances in cryogenic technology.
PhD candidate and Senior Engineer with CAS. Dr. Zou has published over 24 peer-reviewed academic papers in thermal physics and holds multiple patents for small-scale skid-mounted mixed refrigerant liquefaction systems.
Doctor of Engineering from CAS. Recipient of the Special Prize of the Chinese Refrigeration Society. Chief architect of our series-specification skid-mounted natural gas liquefaction units, specializing in phase-change heat transfer processes.
Established with a registered capital of 78 million yuan, Hebei Hongke Qingneng Environmental Protection Equipment Co., Ltd. operates out of the Sanhe Economic Development Zone, Langfang. Our core strength lies in translating cryogenic theory—such as the thermodynamic properties of multi-component mixed refrigerants (MR)—into reliable, commercial-grade machinery. We hold the prestigious A2 level pressure vessel manufacturing license, pressure pipeline component licenses, and dual certifications under GB/T19001-2016 and Sinopec HSSE standards. This technical background ensures that our truck-mounted and skid-mounted plants deliver optimal thermodynamic efficiency, reducing energy consumption per kilogram of liquefied gas.
How our skid-mounted plants optimize the liquefaction process using advanced Mixed Refrigerant Cycles (MRC).
Our plants utilize a closed-loop Single Mixed Refrigerant (SMR) cycle. By custom-blending nitrogen, methane, ethylene, propane, and isopentane, we align the cooling curve of the refrigerant with that of the natural gas stream. This maximizes thermodynamic efficiency, lowering the overall power demand—a key selling point under Denmark's high electricity tariff structures.
| Parameters / Specification | HK-LNG-20K (Micro Scale) | HK-LNG-50K (Medium Scale) | HK-LNG-100K (Commercial Scale) |
|---|---|---|---|
| Design Capacity (Nm³/day) | 20,000 | 50,000 | 100,000 |
| Cold Box Technology | Vacuum powder-insulated / Plate-fin | Core-in-kettle / Plate-fin HX | Multi-stream Brazed Aluminum |
| Refrigerant Cycle | SMR (Single Mixed Refrigerant) | SMR (Single Mixed Refrigerant) | MRC (Optimized Multi-Component) |
| Specific Power Consumption | ≤ 0.38 kWh/Nm³ | ≤ 0.35 kWh/Nm³ | ≤ 0.32 kWh/Nm³ |
| Methane Recovery Rate | ≥ 99.5% | ≥ 99.8% | ≥ 99.9% |
| Skid Footprint (excluding storage) | 12m (L) x 2.8m (W) x 3.2m (H) | 2 x Skids (Process + Compressors) | Modular multi-skid config |
Custom configurations built to address Denmark's specific off-grid liquefaction requirements.
Ideal for Danish farms remote from the transmission grid. Capturing biomethane, stripping impurities via desulphurisation, and liquefying it for local consumption as LBG.
Supplying clean cryogenic fuel to Baltic ferry terminals and shipping routes. Modular systems allow scaling with fuel demand at port locations.
Assisting major Danish manufacturing sites in Jutland. Storing high-density liquefied fuel on-site to run backup energy generators during peak tariff hours.
Danish safety legislation requires strict compliance for cryogenic infrastructure. Here is how our engineering meets these standards.
Deploying pressure vessels and cryogenic equipment in Denmark requires adherence to direct European Union directives. Every skid-mounted plant we ship to the Nordic region is engineered to meet:
To minimize downtime for Danish operators, all our truck-mounted LNG plants feature integrated IoT telemetry. Our engineering team, working alongside local Danish engineering partners, can access control loops, monitor temperature trends in the cryogenic cold boxes, and troubleshoot process variables remotely.
Insights on the installation, performance, and regulation of skid-mounted LNG/LBG plants in Denmark.
No, biogas must first be upgraded to bio-methane. Water, H2S, CO2, siloxanes, and volatile organic compounds (VOCs) must be stripped out before cooling. We supply custom purification and desulphurisation equipment alongside our cryogenic systems to prepare the gas for liquefaction.
Typically, standard sizes (e.g., 50,000 Nm³/day) take between 7 to 9 months for manufacture, assembly, and testing. This timeframe includes the necessary quality inspections and third-party certifications for European compliance.
Yes. Our CAS-designed liquefaction cycle integrates an automated Boil-Off Gas re-liquefaction loop. This system recompresses vaporized methane from storage tanks and returns it to the cold box, minimizing gas loss.
Yes. Our engineering team provides supervised installation and commissioning on-site. We also deliver hands-on technical training for local plant operators covering safety systems, refrigerant balancing, and shutdown protocols.
From cryogenic liquefaction modules to environmental recovery systems, explore our full range of certified industrial machinery.
Targeted sulfur removal configurations to prepare raw farm gas streams for low-temperature processing.
Learn More
Durable, non-standard autoclaves and treatment machinery designed for Danish veterinary facilities.
Learn More
Compact, factory-tested liquefaction skids optimized for small-footprint installations.
Learn More
High-efficiency purification components designed to prevent corrosion in liquefaction pipelines.
Learn More
Designed for Danish manufacturing facilities, capturing organic vapors and cutting VOC emissions.
Learn More
High-throughput biological waste treatment systems designed for regional Danish hospitals.
Learn More
Advanced multi-layer absorption configurations designed for chemical and pharmaceutical facilities.
Learn More
A2-level pressure vessels engineered and stamped to comply with PED and EN directives.
Learn MoreLet our CAS and Tsinghua-trained engineering team develop a tailored design for your biogas or natural gas liquefaction project in Denmark.
Hongke Qingneng