Nitrogen Generator By Pressure Swing Adsorption (PSA)

Short Description:

Nitrogen generator by pressure swing adsorption is the use of a carbon molecular sieve adsorbent processed from high quality coal, coconut shell or epoxy resin under pressurized conditions, the diffusion speed of oxygen and nitrogen in the air into the carbon molecular sieve hole, so as to separate the oxygen and nitrogen in the air. Compared with nitrogen molecules, oxygen molecules first diffuse into the holes of carbon molecular sieve adsorbent, and the nitrogen that does not diffuse into the holes of carbon molecular sieve adsorbent can be used as the product output of gas for users.

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Technical Advantages:

• The equipment is skid mounted and delivered and there is no on-site installation work.
• The unit covers a small area and has a short production cycle.
• Starts up quickly and provides product nitrogen for 30 minutes after start-up.
• High level of automation, fully automatic and unmanned operation.
• Simple process, less maintenance.
• Product purity of 95%~99.9995% is optional.
• The equipment has a life span of more than ten years.
• There is no need to fill the molecular sieve during operation.

Nitrogen Purification Systems:

After the raw nitrogen (volume oxygen content ~1%) produced by the PSA pressure swing adsorption or membrane separation nitrogen system has been mixed with a small amount of hydrogen, the residual oxygen in the raw nitrogen reacts with hydrogen to form water vapour in a reactor equipped with a palladium catalyst. The chemical reaction formula is 2H2＋ O2→ 2H2O+ heat of reaction
The high purity nitrogen leaving the reactor is first cooled by the condenser to remove condensate. After drying in the adsorption dryer, the final product is very clean and dry nitrogen (product gas dew point up to -70℃). The hydrogen feed rate is adjusted by continuously monitoring the oxygen content in the high purity nitrogen. The specially designed control system can automatically regulate the hydrogen flow rate and ensure the minimum hydrogen content in the product nitrogen. The on-line analysis of purity and moisture content allows the unqualified products to be automatically discharged. The entire system is fully automated for operation.

Technical Index of Nitrogen Refining System:

(Suitable for the scene with convenient hydrogen supply and large volume of nitrogen gas)Raw Material Nitrogen
Purity: 98% or more
Pressure: 0.45 Mpa.g≤P≤1.0 Mpa.g
Temperature: ≤40℃.
Deoxy hydrogen
Purity: 99.99% (the rest is water vapor and residual ammonia)
Pressure: higher than raw nitrogen 0.02~0.05Mpa.g
Temperature:≤40℃
Nitrogen purity after deoxygenation Product: excess hydrogen content: 2000 ~ 3000 PPm; Oxygen content: 0 PPm.

PSA Nitrogen Generator Specification & Performance Table

Performance Parameters Unit Model	95%	97%	98%	99%	99.5%	99.9%	99.99%	99.999%	Air Compressor Capacity	Equipment Footprint M²
Performance Parameters Unit Model	Nitrogen Production								Kw	*Length Width**
LFPN-30	50	47	44	40	37	29	21	19	11	3.0×2.4
LFPN-40	64	61	58	53	48	38	28	25	15	3.4×2.4
LFPN-50	76	73	70	64	59	47	34	30	18	3.6×2.4
LFPN-60	93	87	85	78	71	57	41	37	22	3.8×2.4
LFPN-80	130	120	120	110	100	80	57	51	30	4.0×2.4
LFPN-100	162	150	150	137	125	100	73	65	37	4.5×2.4
LFPN-130	195	185	180	165	150	120	87	78	45	4.8×2.4
LFPN-160	248	236	229	210	191	152	110	100	55	5.4×2.4
LFPN-220	332	312	307	281	255	204	148	133	75	5.7×2.4
LFPN-270	407	383	375	344	313	250	181	162	90	7.0×2.4
LFPN-330	496	468	458	420	382	305	221	198	110	8.2×2.4
LFPN-400	601	565	555	509	462	370	268	240	132	8.4×2.4
LFPN-470	711	670	656	600	547	437	317	285	160	9.4×2.4
LFPN-600	925	870	853	780	710	568	412	369	200	12.8×2.4
LFPN-750	1146	1080	1058	969	881	705	511	458	250	13.0×2.4
LFPN-800	1230	1160	1140	1045	950	760	551	495	280	14.0×2.4

※The data in this table are based on the conditions of ambient temperature of 20℃, atmospheric pressure of 100 Kpa and relative humidity of 70%. Nitrogen pressure ~ 0.6 Mpa.g. Nitrogen gas was extracted directly from the PSA adsorption bed without deoxygenation and can provide 99.9995% purity of nitrogen.

Application:

Metal Heat Treatment: Bright Quenching and Annealing, Carburization, Controlled Atmosphere, Powder Metal Sintering
Chemical Industry: Cover, Inert Gas Protection, Pressure Transmission, Paint, Cooking Oil Mixing
Petroleum Industry: Nitrogen Drilling, oil well maintenance, refining, natural gas recovery
Chemical Fertilizer Industry: Nitrogen Fertilizer Raw Materials, Catalyst Protection, Washing Gas
Electronics Industry: Large-scale Integrated Circuit, Color TV Display Tube, TV and Cassette Recorder Components and Semiconductor Processing
Food Industry: Food Packaging, Beer Preservation, Non-chemical Disinfection, Fruit and Vegetable Preservation
Pharmaceutical Industry: Nitrogen Filling Packaging, Transportation and Protection, Pneumatic Transmission of Drugs
Coal Industry: Coal Mine Fire Prevention, Gas Replacement in the Process of Coal Mining
Rubber Industry: Cross-linked Cable Production and Rubber Products Production Anti-aging Protection
Glass Industry: Gas Protection in Float Glass Production
Cultural Relics Protection: Anti-corrosion Treatment and Inert Gas Protection of Unearthed Cultural Relics, Paintings and Calligraphy, Bronzes and Silk Fabrics