Technical Support
FAQ
By Product Category:
Q1 How to Choose Between PSA and Membrane Nitrogen Generation?
PSA (Pressure Swing Adsorption) nitrogen generators are ideal for high-purity (99%–99.999%) and large-volume applications; membrane nitrogen offers a simpler structure with lower maintenance, suited for purity levels of 95%–99%.
Q2 What Purity Can PSA Nitrogen Generators Achieve?
PSA nitrogen generators can achieve up to 99.999% purity (≤10 ppm O₂), meeting stringent requirements for electronics, food processing, chemical, and heat treatment applications.
Q3 What Oxygen Purity Can Oxygen Generators Achieve?
PSA oxygen generators typically deliver 90%–95% purity, suitable for industrial combustion, wastewater treatment, and glass furnaces. For medical-grade ≥99.5% O₂, cryogenic liquid oxygen is recommended.
Q4 What Are the Energy Consumption and Noise Levels?
PSA nitrogen production typically consumes 0.3–0.6 kWh per Nm³ of nitrogen, depending on purity settings and ambient temperature. Standard units operate at 65–75 dB(A); detailed energy estimates are provided during the proposal stage.
Q5 What Utilities Are Required for Nitrogen/Oxygen Generators?
Key utilities include clean compressed air (0.6–0.8 MPa inlet), stable power supply, and adequate ventilation. No cooling water is required, simplifying on-site installation.
Q1 What Is the Difference Between Cryogenic Air Separation and PSA?
Cryogenic air separation uses low-temperature distillation to simultaneously produce high-purity gaseous O₂, N₂, liquid O₂, and liquid N₂, ideal for large-scale production or when liquid products are needed. PSA is better suited for small-to-medium single-gas applications.
Q2 Can Cryogenic Units Simultaneously Produce Liquid O₂ and Liquid N₂?
Yes. Distillation columns yield gaseous and liquid O₂ and N₂ simultaneously, both at ≥99.5% purity. A liquid argon extraction unit can be added if required.
Q3 How Long Does Cold Start-up Take?
Cold start-up from ambient temperature to full product specification typically takes 12–24 hours, depending on unit size and configuration. Once running, the system operates continuously and steadily.
Q4 How Is BOG (Boil-Off Gas) from Liquid Storage Tanks Handled?
BOG (Boil-Off Gas) can be re-liquefied, fed into the pipeline network as gaseous product, or compressed for integrated utilization. We design the optimal BOG recovery scheme based on tank capacity and downstream demand.
Q5 What Site Requirements Apply to Cryogenic Units?
Requirements include classified explosion-proof zones, anti-static grounding, adequate ventilation, and safe distances around tanks. We provide complete plot plans during the design phase.
Q6 What Is the Major Overhaul Interval for Cryogenic Units?
Typical planned overhaul interval is 3–5 years of continuous operation, with regular checks on the air compressor, cold-box insulation, and instrumentation.
Q1 What Is the Difference Between PEM and Alkaline Electrolysis?
PEM (Proton Exchange Membrane) electrolysis offers fast response and flexible start/stop, making it ideal for pairing with variable renewable energy such as wind and solar PV. Alkaline electrolysis has lower unit cost, better suited for steady industrial power supply.
Q2 What Hydrogen Purity Can PEM Electrolyzers Achieve?
PEM electrolyzer output typically delivers 99.9%–99.999% (5N) purity, meeting fuel cell grade, industrial hydrogen, and cylinder filling specifications after drying.
Q3 What Is the Service Life and Maintenance Requirement for PEM Equipment?
Proton exchange membranes are typically rated for 50,000–80,000 hours. Key maintenance involves periodic membrane electrode assembly (MEA) replacement; routine care can be performed by operators.
Q4 How Is Safety Ensured for Hydrogen Storage and Filling?
Systems include H₂ leak detection, overpressure protection, and emergency shut-off interlocks, complying with GB 50516 and related national standards. Filling systems are designed per hydrogen refueling station or industrial filling codes.
Q5 Can Hydrogen Equipment Be Directly Coupled with Solar/Wind Power?
Yes. PEM electrolysis supports 10%–100% rated power load following, enabling direct coupling with variable renewable energy for green hydrogen projects.
Q1 What Natural Gas Processing Projects Do You Undertake?
We undertake natural gas dehydration, H₂S removal, CO₂ removal, and integrated purification projects, with custom process design based on inlet composition and product specifications.
Q2 What Desulfurization Process Is Recommended for Natural Gas?
aMDEA chemical absorption suits high H₂S content, large-volume, continuous operations; molecular sieve adsorption is preferred for low H₂S or batch operations. We recommend based on feed gas analysis and processing scale.
Q3 What Applications Are Three-Phase Separators Suitable For?
Designed for oil–gas–water three-phase separation, commonly used in wellhead gas processing, NGL (natural gas liquid) separation, and associated gas recovery. Available in vertical and horizontal configurations, customized by pressure rating and throughput.
Q4 What Scale of Projects Are LNG Liquefaction Units Suitable For?
We specialize in small-to-medium LNG projects with capacities of 1,000–50,000 Nm³/h, using the Mixed Refrigerant Cycle (MRC) process in skid-mounted packages for rapid deployment to gas fields, mining sites, or industrial parks.
Q5 What Natural Gas Dehydration Processes Are Available and How to Choose?
TEG (Triethylene Glycol) dehydration is suited for continuous, large-volume operations; molecular sieve dehydration is selected for ultra-low dew point requirements (≤−60°C) or feeds containing trace sulfides.
Q6 Can You Undertake Biogas Upgrading to CBG or Bio-LNG?
Yes. We provide end-to-end solutions from biogas H₂S removal and CO₂ upgrading to biomethane (≥97% CH₄), then compression to CBG or liquefaction to Bio-LNG, suitable for farms, landfills, and wastewater treatment plants.
Q1 What Types of Gas Generator Sets Do You Offer?
We supply gas generator sets powered by natural gas, biogas, coalbed methane, and industrial off-gases (including H₂-rich mixtures), ranging from tens of kW to several MW, for self-generation, CHP, and gas-field power supply.
Q2 What Are the Gas Quality Requirements for Generator Sets?
Incoming gas must maintain stable pressure (typically 0.5–30 kPa), H₂S ≤200 mg/m³, and be free of liquids and solid particles. Gas composition analysis is required for biogas or coalbed methane applications.
Q3 Can the Generator Set Operate in Parallel with the Plant Grid?
Yes. Units are equipped with grid-parallel protection and support both grid-connected and islanded (off-grid) operation. Complete grid-interconnection design and commissioning services are provided.
Q4 Can Waste Heat from the Generator Set Be Recovered?
Yes. Flue gas temperature is typically 400–550°C and jacket cooling water ~80–90°C, both recoverable via waste heat boilers or heat exchangers for industrial process heat or domestic hot water, raising overall energy efficiency to over 80%.
Q5 What Is the Maintenance Schedule for Generator Sets?
Routine maintenance is typically every 500–1,000 operating hours (minor) and 4,000–8,000 hours (major, including oil change, spark plug inspection, and valve adjustment). Annual maintenance contracts and emergency response are available.
Q1 How Is Equipment Delivered?
All main equipment is delivered as fully assembled, pre-tested skid-mounted packages. On-site work is limited to pipe connections and utility hookup, significantly reducing construction timelines.
Q2 How Long from Contract Signing to Equipment Delivery?
Standard units typically ship 8–16 weeks after contract signing; custom or large-scale projects are quoted separately. Milestones are defined in the contract with progress reports provided.
Q3 Is Professional Training Required for Operators?
Systematic operator training is provided during commissioning, covering equipment theory, daily inspection, fault diagnosis, and emergency procedures. Trained operators can independently manage the equipment after passing the assessment.
Q4 How Is After-Sales Service and Spare Parts Support Guaranteed?
Within the warranty period, all faults are handled by us. Post-warranty services include paid technical support, annual inspections, and equipment health assessments. Key spare parts can be supplied with the equipment; we recommend maintaining a stock per the suggested list.
Q5 Do You Offer EPC (Turnkey) General Contracting Services?
Yes. We offer full EPC (Engineering, Procurement, Construction) delivery, taking responsibility for design, procurement, and installation—ideal for clients seeking to reduce management burden and accelerate project delivery.
