The nitrogen generator for petroleum & natural gas is mainly used in protection, transportation, covering, pipeline replacement, rescue, maintenance, nitrogen injection, oil recovery, dilution nitrogen content, etc.
Keep your tanks, pipelines and processing units safe and productive with on-site, engineered gas solutions from RICH. Since 1979, RICH has focused on R&D, manufacturing and delivery of gas production systems and is a leader in room-temperature air separation in China. With 40+ years’ experience and 4,000+ systems installed worldwide, we design rugged, field-ready systems that solve the real problems oil & gas teams face: supply interruptions, purity instability, maintenance overhead and harsh site conditions.
Stop relying on cylinder deliveries — get gas on demand, 24/7.
Protect catalysts, instruments and product quality with steady, verified gas purity.
Run safer in hazardous zones with explosion-rated designs and integrated safety logic.
Cut energy and operating costs through patented process efficiency and smart controls.
Tank & vessel inerting / preservation (terminals, FPSO, tank farms)
Pipeline hydrostatic and pneumatic testing, commissioning and leak detection
Process purging for startups/shutdowns and maintenance blowdowns
Catalyst protection and feedstock conditioning for hydrotreating/hydrocracking
Hydrogen polishing and recycle in refining units
Instrument and analyzer purge/blanketing gas
Tail-gas & VOC treatment via carbon combustion purifiers
Custom On-site PSA Nitrogen Systems (including RL-VI engineered options) — for medium → high purity needs and bulk inerting.
PNF Series & PNF+ Series PSA Nitrogen Generators — standard and enhanced availability models.
Horizontal Nitrogen Skids — compact footprint for tight sites.
Membrane Nitrogen Generators — low-maintenance, mobile or temporary solutions for moderate purity.
POF Series PSA Oxygen / VPSA Oxygen Plants — where process oxygen is required.
PSA Hydrogen Separation & Purification Units — hydrogen polishing and recycle.
Carbon Combustion Purifiers — tail gas oxidation and VOC control.
Desiccant Dryers / Drying Systems — moisture control for instruments and sensitive processes.
We only list technologies that are applicable to oil & gas and explain what they do for you:
RL-VI process (Patent No. 99101651.3)
Improves nitrogen purity continuity through the adsorption bed and reduces feed-air consumption. Engineered RL-VI systems can be designed to achieve very high purities (up to 99.9995% N₂ in optimized, FAT-verifiable configurations). Customer benefit: better catalyst protection, lower compressor energy per Nm³.
Patented pneumatic pipeline valve (Patent No. 89213676.6)
One-piece piston/plug actuator for ultra-fast actuation (0.3–0.5 s), low pressure loss and long sealing life (design cycles up to 2,000,000). Customer benefit: reliable switching, minimal pressure drop and long maintenance intervals.
Self-compressing cylinder (Patent No. 200810200406.9)
Keeps molecular sieve beds under constant compression, provides settling display and sinking alarms. Customer benefit: reduced sieve degradation and more predictable maintenance cycles.
Optimized adsorption tower internals (Patent No. 200920351597.9)
Internal flow control reduces dead zones and sieve attrition. Customer benefit: higher sieve utilization, fewer replacements, lower energy use.
Load-adaptation & purity anti-vibration control (Patent No. ZL202122618572.4)
Adaptive metering and control keep product purity stable when feed temperature or adsorbent performance drifts. Customer benefit: fewer purity excursions, reduced wasted runs and lower energy waste.
Note: purity claims (e.g., 99.9995%) are site- and design-dependent and shown with qualifying language — final performance is confirmed during FAT/SAT.
Stability: RL-VI + anti-vibration control means steady purity even under changing ambient or process loads — crucial for catalysts and process quality.
Energy & cost savings: better sieve utilization and reduced air consumption lower OPEX.
Reliability in the field: rugged valves, self-compressing cylinders and skid packaging improve uptime and cut maintenance.
Safety & compliance: explosion-proof electrical packages and integrated interlocks for hazardous areas.
To provide a tailored proposal, please tell us:
Application (inerting / testing / hydrogen polishing / VOC treatment)
Required flow — peak and continuous (Nm³/h or scfm)
Required purity (% N₂, % H₂ or O₂ spec)
Delivery pressure (bar/psi) and whether boosters/compressors are available
Duty cycle (continuous 24/7, intermittent, seasonal)
Ambient conditions (temperature range, altitude, corrosive atmosphere)
Installation constraints (indoor/outdoor, footprint, access)
Safety & certification needs (ATEX/IECEx, NACE, vessel codes)
Control integration (DCS/PLC requirements)
Any existing P&ID or utility limitations (power, instrument air)
| Application | Flow (Nm³/h) | Typical purity | Delivery pressure | RICH solution |
|---|---|---|---|---|
| Small tank inerting | 50–200 | 95–99% N₂ | 1–6 bar | PNF or Membrane + buffer vessel |
| Pipeline testing | 500–2,000 | 95–99.9% | 10–25 bar | Custom PSA + booster compressor |
| Continuous blanketing | 200–1,000 | 99–99.9% | 1–10 bar | PNF+ with redundancy |
| High-purity feed protection | 50–500 | up to 99.999% (engineered) | 1–10 bar | RL-VI engineered PSA |
| H₂ polishing | 100–1,000 | 99.9%+ H₂ | Process dependent | PSA H₂ separation |
| Tail gas treatment | — | N/A | N/A | Carbon combustion purifier |
Hazardous-area and explosion-proof packages available (ATEX/IECEx where required).
FAT (Factory Acceptance Test) and SAT (Site Acceptance Test) with performance verification.
Full documentation: P&ID, plant layout, lift plans, maintenance manuals, spare parts lists.
Third-party inspection and test reports available on request.
Eliminate cylinder rental, transport and handling costs.
Reduce unplanned downtime from gas shortages.
Energy savings from RL-VI and load-adaptation control reduces compressor consumption per Nm³.
Lower sieve replacement frequency and reduced maintenance labor.
(We can prepare a project-specific CAPEX/OPEX and payback analysis if you share your current usage and costs.)
Q: Can you reach 99.9995% N₂?
A: RL-VI engineered systems are capable of very high purities; achievable level depends on feed conditions and system configuration — all high-purity claims are validated by FAT/SAT.
Q: Are your systems suitable for hazardous zones?
A: Yes. We offer hazardous-area builds and explosion-proof electrical packages per customer safety requirements.
Q: How long to deliver and commission?
A: Typical standard skids: 6–12 weeks. Custom, high-purity or certified builds require longer engineering time — exact lead time provided in proposal.
Q: Do you provide remote monitoring?
A: Yes — PLC/HMI, DCS integration and cloud telemetry options are available for remote status and predictive maintenance.
Request a free technical assessment: Provide application, target flow & purity, and site location.
Request a site survey & quotation: We’ll prepare an engineered proposal with CAPEX/OPEX and payback.
Request FAT data or technical datasheets: Patent summaries and FAT reports available on request.
Schedule a factory visit / demo: See our testing and assembly processes.
Flammable, explosive, and oxidizing substances exist everywhere in the refining industry. Safe and inert nitrogen is always used in material transportation, catalyst protection, pipeline purging, material packaging, and accident handling.
According to the classification of raw materials in the chemical industry, our nitrogen production equipment products have covered every aspect of the chemical industry, such as synthetic resins, fibers, plastics, fertilizers, chlor-alkali, calcium carbide, catalysts etc.
Synthetic resins, fibers, plastics, fertilizers and other chemical industries in flammable, explosive, oxidizing substances everywhere, in material transportation, catalyst protection, pipeline purging, material packaging, accident treatment, etc., almost all use inert nitrogen.
Put concise, dependable gas supply and purification at the heart of your chemical processes. Since 1979, RICH has focused on R&D and manufacture of air-separation and gas purification systems. With 40+ years of experience and 4,000+ installed systems, we deliver engineered on-site nitrogen, oxygen, hydrogen purification and VOC treatment solutions that solve the most common chemical-industry problems: unstable gas purity, process interruptions, costly logistics and excessive energy use.
Reliable, on-site process gas systems (N₂, O₂, H₂) and tail-gas purification engineered to protect product quality, improve safety and reduce OPEX for chemical plants.
Inerting and blanketing for reactors, storage tanks and flares
Carrier and purge gas for reactors, distillation columns and analyzers
Oxygen supply for controlled oxidations or combustion processes (POF / VPSA)
Hydrogen polishing / recycling for hydrogenation and hydrotreating steps
VOC, solvent and tail-gas oxidation (carbon combustion purifiers)
Dry, moisture-free gas for dehydration-sensitive steps and instrument air
Purity stability: RL-VI + purity anti-vibration control keep purity within spec even when feed or load varies.
Process compatibility: engineered delivery pressure, dew-point control and integration with reactor controls/DCS.
Safety & compliance: hazardous-area electricals, interlocks and emissions control solutions.
Energy efficiency: optimized adsorption towers + load-adaptation reduce feed-air and compressor power.
Maintenance & uptime: robust pneumatic valves, self-compressing cylinders and tower internals reduce sieve attrition and maintenance frequency.
Documentation & validation: FAT/SAT reports, P&ID, and verification packages to support validation and QA.
PNF / PNF+ PSA Nitrogen Generators — inerting, blanketing, purge, carrier gas.
RL-VI engineered PSA units — high-purity nitrogen for catalyst protection and high-spec process steps.
Membrane Nitrogen Generators — mobile or low-maintenance option for moderate-purity carrier gas.
POF Series PSA Oxygen / VPSA Oxygen Plants — on-site oxygen for oxidation chemistry, combustion air optimization.
PSA Hydrogen Separation & Polishing Units — hydrogen recycle/polish for hydrogenation steps.
Carbon Combustion Purifiers — VOC/tail-gas oxidation, emission control and flare minimization.
Desiccant Dryers / Drying Systems — low dew-point gas for moisture-sensitive reactions and instruments.
(Only technologies that are applicable are shown; performance claims include qualifying language and are verified via FAT/SAT.)
RL-VI process (Patent No. 99101651.3)
Improves the purity uniformity across adsorption beds and lowers feed-air consumption. Benefit: more stable high-purity N₂ for sensitive reactions and reduced compressor energy per Nm³. (High-purity designs may achieve up to 99.9995% N₂ under optimized, FAT-verified conditions.)
Purity anti-vibration & load-adaptation control (Patent No. ZL202122618572.4)
Adaptive metering and control logic stabilizes product purity when feed temperature or adsorbent activity drifts. Benefit: prevents purity excursions that can damage catalysts or force unplanned shutdown.
Optimized adsorption tower internals (Patent No. 200920351597.9)
Engineered internals reduce dead zones and minimize sieve attrition. Benefit: extended sieve life, lower dust/powdering, and improved adsorption efficiency.
Self-compressing cylinder (Patent No. 200810200406.9)
Maintains constant molecular sieve compression and provides visual settling indicators and alarms. Benefit: predictable maintenance cycles and less frequent sieve replacement.
Patented pneumatic pipeline valve (Patent No. 89213676.6)
Fast actuation, low pressure loss and very long sealing life reduce switching losses and maintenance. Benefit: reliable automated purging, fast step changes and lower operational losses.
Note: All high-purity and performance claims are site-dependent and subject to verification during FAT and SAT.
1. Reactor inerting & blanketing
Problem: oxygen traces cause exotherms or product degradation.
RICH solution: PNF/PNF+ PSA or RL-VI high-purity N₂ with on-line O₂ monitors and automatic control. Benefit: consistent low O₂ ppm to protect product & safety.
2. Carrier and purge gas for sensitive reactions
Problem: fluctuating flow/purity affects selectivity.
RICH solution: Membrane or PSA systems sized for steady flow with dew-point control; purity anti-vibration control avoids excursions. Benefit: repeatable yields and fewer rejects.
3. Hydrogen polishing for hydrogenation
Problem: impurities poison catalysts.
RICH solution: PSA H₂ separation/polishing skid to deliver high-purity H₂ to reactors. Benefit: longer catalyst life and more efficient hydrogen usage.
4. Controlled oxidations / oxygen feed
Problem: shipping liquid O₂ or cylinders is costly and risky.
RICH solution: POF series PSA or VPSA oxygen plant sized on demand. Benefit: on-site, meterable oxygen with reduced logistics and improved safety.
5. VOC and tail-gas treatment
Problem: emissions and solvent waste.
RICH solution: carbon combustion purifier tuned to process VOC composition. Benefit: regulatory compliance and reduced emissions.
When requesting a quote, include:
Application (inerting/blanketing, carrier gas, H₂ polishing, O₂ supply, VOC treatment)
Peak & continuous flow (Nm³/h or scfm)
Required purity (O₂/H₂/N₂ %) or ppm O₂ specification
Delivery pressure and any booster needs (bar/psi)
Required dew point for dry gas (e.g., ≤-40 °Cdp)
Duty cycle: continuous, intermittent, batch schedule
Ambient & site conditions (temp range, corrosives, indoor/outdoor)
Safety/regulatory needs (ATEX, local regs, emissions limits)
Integration needs (DCS/PLC, analog/digital I/O, batching control)
Any P&ID, solvent/VOC analyses or process chemistry constraints
| Application | Flow (Nm³/h) | Typical purity | Pressure | RICH solution |
|---|---|---|---|---|
| Reactor inerting (batch) | 20–300 | 99–99.9% N₂ | 1–6 bar | PNF / PNF+ with buffer |
| Carrier/purge gas for small reactor | 5–100 | 95–99% | 0.5–6 bar | Membrane or small PSA |
| Hydrogen polishing for hydrogenation | 50–500 | 99.9%+ H₂ | process dependent | PSA H₂ separation |
| On-site oxygen for oxidation | 50–1000 | 90–95% O₂ (POF/VPSA) | 1–6 bar | POF / VPSA oxygen plant |
| VOC/tail-gas treatment | — | N/A | N/A | Carbon combustion purifier |
| Low-dew instrument gas | 1–50 | N/A | 0–6 bar | Desiccant dryer + PSA/membrane |
Safety & hazardous area options: ATEX/IECEx electrical packages and zone-rated instrumentation.
Validation packages: FAT, SAT, DQ/IQ/OQ/PQ support available for regulated chemical processes where required.
Emission & environment: carbon combustion systems designed to meet local VOC limits; documentation available upon request.
Full delivery pack: P&ID, GA drawings, control logic, spare parts list and maintenance manual.
Lower logistics & inventory costs by replacing cylinders and bulk deliveries.
Reduced rejects & better yields through stable, controlled gas purity and dew point.
Energy savings from RL-VI and load-adaptation, reducing compressor load per Nm³.
Lower maintenance cost via improved tower internals and long-life valves/cylinders.
(We can run a site-specific CAPEX/OPEX and payback model if you share current gas usage and costs.)
Client: Specialty chemical producer (confidential)
Challenge: Frequent product downgrades due to variable purge gas purity; high cylinder handling costs.
Solution: Installed RL-VI engineered PSA skid with desiccant dryer and O₂ monitoring integrated into DCS.
Result: Product yield increased by X%, cylinder costs eliminated, and annual gas OPEX reduced by Y%.
Q: Can you guarantee a specific purity for my reactor feed gas?
A: Yes — we deliver design-guaranteed purity ranges. High-purity claims are verified at FAT/SAT and depend on feed air quality and system configuration.
Q: Will the system integrate with our DCS and batch control?
A: Yes — we support PLC/DCS integration, analog/digital I/O and custom control recipes for batch sequences.
Q: How do you control moisture for moisture-sensitive steps?
A: We provide desiccant drying systems sized to target dew-points and can pair them with PSA/membrane solutions for required purity and dryness.
Q: Do you treat solvent/VOC exhaust?
A: Yes — carbon combustion purifiers can be tuned to the solvent mix and mass flow; we design to local emission limits.
Request a free technical assessment: Share application, flow & purity targets, site location.
Request a site survey & tailored quote: We’ll propose system configuration, CAPEX/OPEX and payback.
Request technical datasheets or FAT reports: Patent summaries and verification data available on request.
Schedule a factory visit or demo: See our build and test process.
RICH has advanced food storage and liquid nitrogen preservation technology. Our equipment covers the main domestic granaries, effectively inhibiting the survival of pests and diseases. Our blanketing technology has been widely used in the beer and food packaging. The introduction of nitrogenous sealing technology has greatly extended the product preservation cycle, and relieved the user's worries caused by unsalable products.
Ensure food safety, shelf life, and processing efficiency with RICH on-site gas systems. Since 1979, RICH has specialized in air separation and gas purification, delivering 4,000+ systems worldwide. We provide nitrogen, oxygen, hydrogen polishing, and drying solutions tailored to the food & beverage (F&B) industry, addressing critical challenges like contamination, oxidation, moisture, and process interruptions.
Product spoilage & oxidation: Air exposure can degrade flavor, color, and nutrients.
Packaging inefficiency: Modified atmosphere packaging (MAP) requires precise nitrogen or oxygen control.
Moisture & humidity: Humidity-sensitive products and powders need dry, clean gas to maintain quality.
Regulatory compliance: Food-grade gases must meet stringent safety and purity standards.
Logistics & cylinder dependency: Bulk cylinder supply is costly, labor-intensive, and inconsistent.
Process continuity: Stop production losses due to interrupted gas supply.
Modified Atmosphere Packaging (MAP): fresh produce, meat, dairy, snacks, beverages
Tank blanketing & storage inerting: liquid food, oils, wine, beer
Ingredient purging: removing oxygen from silos, hoppers, pipelines, or reaction vessels
Beverage carbonation & nitrogenation: soft drinks, beer, sparkling water
Drying & moisture control: powders, powders for instant foods, flavorings, milk powder
Process oxygen or hydrogen: fermentation control, enzymatic reactions (if applicable)
PNF / PNF+ PSA Nitrogen Generators — reliable nitrogen for MAP, tank inerting, ingredient purging.
Membrane Nitrogen Generators — compact, low-maintenance solution for moderate-purity nitrogen applications.
POF Series PSA Oxygen / VPSA Oxygen Plants — oxygen enrichment for fermentation or controlled oxidation.
Desiccant Dryers / Drying Systems — moisture control for powders, powders, and sensitive ingredients.
PSA Hydrogen Separation / Polishing Units — optional for specialized food reactions (e.g., hydrogenation of edible oils).
All RICH systems can be designed with food-grade materials and clean-air filtration to meet HACCP, ISO 22000 or similar standards.
Purity stability: RL-VI process (where applicable) ensures consistent nitrogen or oxygen purity, protecting flavors, nutrients, and shelf life.
Clean, food-safe design: stainless steel contact points, sanitary fittings, optional oxygen sensors.
Energy & operational efficiency: reduced compressed-air consumption and low maintenance extend uptime and reduce OPEX.
Moisture control: integrated desiccant drying ensures dew points suitable for powders and moisture-sensitive products.
Process continuity: load-adaptation and purity anti-vibration control prevent production interruptions.
1. MAP for fresh produce or snacks
Problem: Oxygen exposure reduces shelf life.
Solution: On-site PNF+ PSA nitrogen generator paired with buffer vessel.
Benefit: Longer shelf life, consistent quality, lower logistics costs.
2. Beverage tank blanketing & nitrogenation
Problem: Inconsistent carbonation or flavor loss due to oxygen ingress.
Solution: Membrane nitrogen or PNF PSA system with controlled flow.
Benefit: Stable carbonation, reduced oxidation, consistent flavor profile.
3. Powder handling & ingredient purging
Problem: Moisture and oxygen degrade powders.
Solution: PSA nitrogen + desiccant dryer.
Benefit: Dry, inert atmosphere for silo, hopper, or pipeline — extended product quality and easier handling.
4. Fermentation / controlled oxidation
Problem: Inconsistent gas supply impacts microbial activity.
Solution: POF/VPSA oxygen with automated flow control.
Benefit: Stable oxygen feed improves process repeatability and product consistency.
Application type (MAP, tank blanketing, purging, drying, fermentation, etc.)
Required flow (Nm³/h or scfm)
Required purity / dew point (% N₂, % O₂, H₂ ppm, dew point °C)
Delivery pressure (bar/psi)
Duty cycle (continuous, batch, seasonal)
Ambient conditions (temperature range, humidity)
Installation constraints (indoor/outdoor, footprint)
Food-grade and regulatory requirements (HACCP, ISO 22000, FDA, EU)
Control & monitoring integration (PLC, DCS, HMI)
| Application | Flow (Nm³/h) | Purity | Pressure | RICH solution |
|---|---|---|---|---|
| MAP — fresh produce | 20–200 | 95–99% N₂ | 1–6 bar | PNF / PNF+ PSA + buffer vessel |
| Tank blanketing — wine/oil | 50–500 | 95–99% N₂ | 1–6 bar | PNF PSA / Membrane |
| Beverage nitrogenation | 10–200 | 95–98% N₂ | 2–6 bar | Membrane / PNF PSA |
| Powder purging & drying | 5–100 | 95–99% N₂ | 0.5–6 bar | PSA + desiccant dryer |
| Oxygen enrichment (fermentation) | 20–100 | 90–95% O₂ | 1–4 bar | POF / VPSA oxygen plant |
Food-grade materials & stainless steel contact parts
Optional HACCP / ISO 22000 / FDA compliance
FAT/SAT verification for flow, purity and dew point
Full documentation: P&ID, GA drawings, operation & maintenance manuals
Eliminate cylinder delivery and handling costs
Improve shelf life, reduce spoilage
Stable gas purity prevents product quality loss
Energy savings via RL-VI efficiency (if high-purity N₂ required)
Lower maintenance costs via durable valves, cylinders, and tower internals
Q: Can nitrogen purity be guaranteed for MAP?
A: Yes. PSA and membrane systems are designed for consistent purity; verified via FAT/SAT.
Q: Are your systems food-grade and sanitary?
A: Yes — stainless steel contact points, sanitary fittings, and optional clean-air filtration meet F&B standards.
Q: Can I integrate gas flow with production line controls?
A: Yes — PLC/DCS integration, HMI monitoring, and automated control available.
Q: Do you control moisture for powders?
A: Yes — desiccant drying ensures low dew points for powder storage and handling.
Request a free technical assessment: Share your flow, purity, and application.
Request a site survey & quote: Tailored system with CAPEX/OPEX and payback analysis.
Download technical datasheets / FAT reports (gated).
Schedule a factory visit / demo: See PSA, membrane, and dryer solutions in operation.
RICH's coal mine nitrogen injection system is a series of innovative products developed for the demand of underground coal mining, which can effectively prevent the gas explosion and coal dust explosion in underground coal mines, and provide a strong guarantee for underground coal mining operations. We provide horizontal portable nitrogen injection products for underground coal mining operations, especially ultra-large nitrogen injection products.
Safety and operational reliability are critical in coal mining. RICH, since 1979, has delivered 4,000+ gas production systems worldwide. We provide on-site nitrogen, oxygen, and drying solutions tailored to the coal mining industry, helping prevent hazards, improve process efficiency, and maintain gas supply continuity underground and at surface facilities.
Explosion and fire risks: Methane and coal dust require inerting and controlled atmospheres.
Oxygen management: Maintaining safe O₂ levels to prevent combustion hazards.
Process continuity: Interruptions in gas supply can delay coal handling, processing, and transportation.
Humidity & moisture control: Wet mines and equipment require dry, clean gas to avoid corrosion and sensor failures.
Equipment reliability: Remote underground locations demand low-maintenance, durable systems.
Logistics challenges: Cylinder delivery underground is costly, risky, and limited in accessibility.
Mine inerting & blanketing: N₂ injection for explosion prevention in conveyors, silos, storage areas, and processing plants
Ventilation & safety gas supply: Controlled O₂ and N₂ for monitoring stations, refuges, and underground facilities
Process gas supply: Nitrogen for coal handling, crushing, screening, and pelletizing plants
Moisture control & instrumentation: Dry gas for pneumatic systems, sensors, and conveyors
Emergency backup & mobile systems: Portable or skid-mounted PSA/membrane systems for rapid deployment
PNF / PNF+ PSA Nitrogen Generators — on-site nitrogen for inerting and explosion prevention.
Membrane Nitrogen Generators — compact, low-maintenance N₂ for continuous flow in mine facilities.
POF Series PSA Oxygen / VPSA Oxygen Plants — controlled O₂ supply for safe mining operations.
Desiccant Dryers / Drying Systems— low dew point gas for instruments, pneumatics, and sensitive equipment.
All systems can be configured for hazardous area compliance (ATEX/IECEx) and remote monitoring.
Purity and reliability: RL-VI process (where applicable) and load-adaptation ensure consistent N₂ supply to inert explosive atmospheres.
Energy efficiency: Optimized adsorption tower design reduces feed-air and compressor load, lowering operational costs.
Durable design: Pneumatic valves, self-compressing cylinders, and robust tower internals extend service life even in harsh underground conditions.
Moisture & corrosion control: Integrated desiccant dryers protect instrumentation, sensors, and pneumatic equipment.
Remote operation & monitoring: Systems designed for automated control with feedback, enabling minimal manual intervention underground.
1. Mine inerting / explosion prevention
Problem: Methane and coal dust increase explosion risk.
Solution: PNF+ PSA nitrogen generator delivering N₂ to silos, conveyors, or storage areas.
Benefit: Reduced O₂ below safe thresholds, lowering explosion risk, and reducing regulatory violations.
2. Ventilation & safe refuge gas supply
Problem: Uncontrolled O₂ levels in underground shelters or monitoring stations.
Solution: VPSA oxygen and PSA N₂ systems for controlled safe atmospheres.
Benefit: Stable, safe air composition for personnel and emergency refuges.
3. Dry gas for instrumentation and process equipment
Problem: Moisture leads to corrosion or sensor failures.
Solution: PSA nitrogen with integrated desiccant drying.
Benefit: Reliable sensor and pneumatic operation; reduced downtime.
4. Mobile/portable backup systems
Problem: Emergency or temporary underground works need rapid gas deployment.
Solution: Skid-mounted membrane or PSA nitrogen generators.
Benefit: Quick setup, safe inerting, and flexible deployment.
Application type (inerting, ventilation, process gas, drying)
Required flow (Nm³/h or scfm)
Purity or O₂ level specification (%)
Delivery pressure (bar/psi)
Duty cycle (continuous, batch, emergency)
Ambient & mine conditions (temperature, humidity, explosive gas concentration)
Installation constraints (underground, surface, footprint)
Safety and regulatory compliance requirements (ATEX, IECEx, local mine regulations)
Remote monitoring or integration needs
| Application | Flow (Nm³/h) | Purity / O₂ | Pressure | RICH solution |
|---|---|---|---|---|
| Conveyor / silo inerting | 50–500 | 95–99% N₂ | 1–6 bar | PNF / PNF+ PSA + buffer vessel |
| Underground refuge / ventilation | 10–100 | 20–21% O₂ | 0.5–3 bar | VPSA / POF oxygen plant |
| Dry gas for sensors / pneumatics | 5–50 | 95–99% N₂ | 0.5–6 bar | PSA + desiccant dryer |
| Emergency mobile inerting | 5–50 | 95–98% N₂ | 1–6 bar | Membrane or skid-mounted PSA |
Hazardous area approvals (ATEX, IECEx)
FAT/SAT verification for flow, purity, dew point, and safety interlocks
Documentation: P&ID, GA drawings, operation & maintenance manuals
Remote monitoring and automation-ready designs
Improved mine safety by reducing explosion risks
Reduced O₂-related hazards in storage and processing areas
Reliable gas supply reduces downtime
Eliminate cylinder logistics and emergency deliveries
Energy savings with optimized RL-VI or load-adaptation systems
Lower maintenance due to durable valves, towers, and cylinders
Q: Can N₂ purity be guaranteed for mine inerting?
A: Yes. PSA and membrane systems are designed for stable purity verified at FAT/SAT.
Q: Can systems operate underground with limited access?
A: Yes — skid-mounted or compact systems with remote monitoring reduce manual intervention.
Q: Are the systems suitable for hazardous areas?
A: Yes — we provide ATEX/IECEx certified packages.
Q: Can moisture-sensitive equipment be protected?
A: Yes — desiccant dryers and dew-point control ensure reliable gas quality.
The application of nitrogen not only improves the quality of metal processing products,but also promotes the improvement of production efficiency and the reduction of costs.With the advancement of metal processing technology,the application of nitrogen in this field is expected to be more widely promoted and deepened.Nitrogen plays a vital role in the metal processing industry and has a wide range of applications,
mainly including the following aspects:
1. Laser cutting
As an auxiliary gas ,nitrogen prevents metal oxidation,ensures cutting quality,and removes molten metal....
2. Heat treatment
As a protective gas,nitrogen prevents oxidation corrosion when teh mental is heated,and is suitabel for special processes.
3. Welding
Use nitrogen protection to prevent weld oxidation,especially in stainles steel welding.
4. Casting、powder metallurgy
Nitrogen as a protective atmosphere improves the quality of finished products and improves the structure of castings.
5. Storage and transportation
Nitrogen creates an oxygen-free environment and effectively prevents oxidation and corrosion of metal materials.
Efficient and safe metal production relies on high-purity gases. RICH, with over 40 years of experience and 4,000+ systems installed worldwide, delivers tailored on-site nitrogen, oxygen, and gas purification solutions for the metal industry. From smelting and rolling to surface treatment and heat treatment, RICH ensures stable gas supply, optimized production, and improved product quality.
Oxidation & surface defects: Air exposure during smelting, casting, or heat treatment can degrade metal quality.
Process control: Consistent nitrogen and oxygen supply is critical for annealing, brazing, and laser cutting.
Moisture & contamination: Humidity or impurities in gases can affect metal properties or equipment.
Cylinder dependency: Bulk cylinders increase cost, logistics complexity, and safety risks.
Energy efficiency & operational continuity: Fluctuating gas supply or low-purity gas can slow production or cause waste.
Inert gas blanketing: Steel, aluminum, copper, and specialty alloys during smelting, casting, or storage
Heat treatment & annealing: Controlled nitrogen or oxygen atmosphere to improve hardness, ductility, and microstructure
Laser cutting & welding: High-purity nitrogen or oxygen for precise cutting, minimal oxidation, and better weld quality
Powder metallurgy & additive manufacturing: Dry, inert nitrogen for powder handling, storage, and 3D printing
Surface treatment & coating: Nitrogen or oxygen-enriched atmospheres for plating, brazing, or nitriding
PNF / PNF+ PSA Nitrogen Generators — high-purity nitrogen for heat treatment, blanketing, or inerting processes.
Membrane Nitrogen Generators — compact solution for moderate-purity nitrogen in cutting, welding, or storage operations.
POF Series PSA & VPSA Oxygen Plants — oxygen supply for oxidation processes, combustion enhancement, or controlled atmosphere operations.
Desiccant Dryers / Drying Systems — low moisture, high-purity gas for sensitive processing, powder handling, or additive manufacturing.
Systems can be configured for metal-grade applications, minimizing contamination and ensuring process stability.
Stable gas purity: RL-VI PSA technology ensures continuous nitrogen or oxygen purity, improving surface finish and metallurgical properties.
Energy efficiency: Optimized adsorption and tower design reduce air consumption and power costs.
Durable and low-maintenance: High-quality valves, cylinders, and tower internals withstand harsh factory environments.
Moisture control: Desiccant dryers prevent oxidation or corrosion during sensitive processes.
Process reliability: Load-adaptation and anti-vibration controls prevent interruptions and reduce OPEX.
1. Heat treatment / annealing
Problem: Inconsistent nitrogen/oxygen supply leads to surface oxidation or defects.
Solution: PNF+ PSA nitrogen generator with buffer vessels for controlled atmosphere furnaces.
Benefit: Uniform metallurgical properties, reduced scrap, improved product consistency.
2. Laser cutting & welding
Problem: Oxidation reduces surface quality; inconsistent gas pressure impacts precision.
Solution: Membrane or PSA nitrogen generator delivering stable flow and purity.
Benefit: High-quality cuts and welds, reduced post-processing, improved production efficiency.
3. Powder metallurgy & additive manufacturing
Problem: Moisture and air contamination degrade powder quality.
Solution: PSA nitrogen + desiccant dryer.
Benefit: Dry, inert gas atmosphere ensures powder integrity, reduces defects in finished parts.
4. Surface treatment & coating
Problem: Oxidation or impurity gases affect plating, brazing, or nitriding results.
Solution: High-purity PSA nitrogen or oxygen enrichment system.
Benefit: Consistent surface finish, improved adhesion, reduced waste.
Application type (blanketing, heat treatment, laser cutting, powder handling)
Required flow (Nm³/h or scfm)
Purity specification (% N₂ / O₂)
Delivery pressure (bar/psi)
Duty cycle (continuous, batch)
Ambient conditions (temperature, humidity, dust)
Installation constraints (indoor/outdoor, footprint)
Gas quality or contamination limits (ppm O₂, moisture)
Integration with automation or process control
| Application | Flow (Nm³/h) | Purity | Pressure | RICH solution |
|---|---|---|---|---|
| Heat treatment furnace | 50–500 | 95–99% N₂ | 1–6 bar | PNF / PNF+ PSA + buffer vessel |
| Laser cutting / welding | 10–200 | 95–98% N₂ | 2–6 bar | Membrane / PNF PSA |
| Powder metallurgy | 5–50 | 95–99% N₂ | 0.5–6 bar | PSA + desiccant dryer |
| Surface treatment / coating | 10–200 | 95–99% N₂ or 90–95% O₂ | 1–6 bar | PSA / VPSA system |
Metal-grade purity and low contamination
FAT/SAT verification for flow, purity, dew point, and pressure
Documentation: P&ID, GA drawings, operation & maintenance manuals
Optional automation and integration with plant control systems
Reduced oxidation, scrap, and rework
Stable gas supply ensures consistent product quality
Eliminates cylinder dependency, logistics, and safety risks
Energy savings via RL-VI efficiency (high-purity N₂)
Lower maintenance costs due to robust valves, towers, and compressors
Q: Can nitrogen purity be controlled for heat treatment and welding?
A: Yes, RL-VI PSA and membrane systems ensure consistent purity and flow.
Q: Are your systems suitable for dusty, industrial environments?
A: Yes — designed for durability with robust valves and tower internals.
Q: Can moisture be controlled for powder handling or additive manufacturing?
A: Yes — integrated desiccant drying provides low dew-point gas.
Q: Can gas supply be integrated with automated plant controls?
A: Yes — PLC/DCS integration and HMI monitoring are available.
