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.
