The pressure swing adsorption nitrogen making machine is a kind of equipment that separates nitrogen from the air by the principle of adsorption. Its working principle is based on the difference of adsorption characteristics of different gases in the air on the adsorbent, which mainly includes two processes of adsorption and desorption.

pas nitrogen making machine system technology

Product Features of Pressure Swing Adsorption Nitrogen Generator
● Fast start-up speed, providing qualified nitrogen gas in 15-30 minutes
The equipment operates fully automatically, and the entire process can be unmanned
Efficient molecular sieve loading, tighter, more compact, and longer service life
Pressure, purity, and flow rate are stable and adjustable to meet the different needs of customers
Reasonable structure, advanced process, safe and stable, low energy consumption

3. Technical indicators
   Pressure, purity, and flow rate are stable and adjustable to meet the different needs of customers
   ● Flow rate: 5~3000Nm3/hr
   Purity: 95% to 99.999%
   Pressure: ≤ 0.8Mpa (adjustable)
   Atmospheric dew point: ≤ -40 ℃ (lower can be customized)

Working Principle

1. PSA Nitrogen Plant adopts the principle that under a certain pressure, the diffusion speeds of oxygen and nitrogen are quite different

on carbon molecular sieve. In a short time, oxygen molecule is adsorbed by the carbon molecular sieve but nitrogen can pass through the

molecular sieve bed layer to separate the oxygen and nitrogen.

2. After the adsorption process, the carbon molecular sieve will regenerate by depressurizing and desorb the oxygen.

3. Our PSA Nitrogen Plant is equiped with 2 adsorbers, one in adsorption to produce nitrogen, one in desorption to regenerate the

molecular sieve. Two adsorbers work alternately to generate qualified product nitrogen continuously.

Technical Specification

Model	Flow rate (Nm³/h)	Purity(%)	Size(cm) L*W*H	Cylinders(6m³)/8h	Cylinders(10m³)/8h
BWO-3	3	93-96	120*120*180	4	2
BWO-5	5	93-96	120*120*200	7	4
BWO-10	10	93-96	160*150*215	13	8
BWO-20	20	93-96	180*170*255	26	16
BWO-30	30	93-96	190*170*260	40	24
BWO-50	50	93-96	210*200*275	67	40
BWO-100	100	93-96	550*155*320	133	80
BWO-150	150	93-96	600*180*350	200	120
BWO-200	200	93-96	660*200*370	267	160

Features According

1). Full Automation
All systems are designed for un-attended operation and automatic Nitrogen demand adjustment.
2). Lower Space Requirement
The design and Instrument makes the plant size very compact,assembly on skids,prefabricated from factory.
3). Fast Start-up
Start-up time is only 5 minutes to get desired Nitrogen purity.So these units can be switched ON&OFF as per Nitrogen  demand changes.
4). High Reliabiity
Very reliable for continuous and steady operation with constant Nitrogen purity.Plant availability time is better than 99% always.
5). Molecular Sieves Life
Expected Molecular sieves life is around 10-years i.e. whole life time of Nitrogen plant.So no replacement costs.
6). Adjustable
By altering flow,you can deliver Nitrogen  with precisely the right purity.

Introduction to Nitrogen Generator Pressure Swing Adsorption Nitrogen Generator (abbreviated as PSA Nitrogen Generator) is a nitrogen generation equipment designed and manufactured according to pressure swing adsorption technology. Usually, two adsorption towers are connected in parallel, and a fully automatic control system strictly controls the timing according to a specific programmable program, alternately performing pressurized adsorption and depressurization regeneration to complete nitrogen oxygen separation and obtain the required high-purity nitrogen gas.

Classification: Cryogenic air separation for nitrogen production
Cryogenic air separation for nitrogen production is a traditional nitrogen production method with a history of nearly several decades. It uses air as raw material, undergoes compression and purification, and then uses heat exchange to liquefy the air into liquid air. Liquid air is mainly a mixture of liquid oxygen and liquid nitrogen. By utilizing the different boiling points of liquid oxygen and liquid nitrogen (at 1 atmosphere, the former has a boiling point of -183 ℃, while the latter has a boiling point of -196 ℃), they are separated through liquid air distillation to obtain nitrogen gas. The cryogenic air separation nitrogen production equipment is complex, occupies a large area, has high infrastructure costs, requires a large one-time investment in equipment, has high operating costs, produces gas slowly (12-24h), has high installation requirements, and has a long cycle. Taking into account factors such as comprehensive equipment, installation, and infrastructure, the investment scale of PSA units with the same specifications for equipment below 3500Nm3/h is 20% to 50% lower than that of cryogenic air separation units. The cryogenic air separation nitrogen production unit is suitable for large-scale industrial nitrogen production, while medium and small-scale nitrogen production appears uneconomical.

Molecular sieve air separation for nitrogen production

The method of using air as raw material, carbon molecular sieve as adsorbent, and pressure swing adsorption principle to selectively adsorb oxygen and nitrogen by carbon molecular sieve to separate nitrogen and oxygen is commonly known as PSA nitrogen production. This method is a new nitrogen production technology that rapidly developed in the 1970s. Compared with traditional nitrogen production methods, it has the advantages of simple process flow, high degree of automation, fast gas production (15-30 minutes), low energy consumption, adjustable product purity within a large range according to user needs, convenient operation and maintenance, low operating costs, and strong device adaptability. Therefore, it is highly competitive in nitrogen production equipment below 1000Nm3/h and is increasingly popular among small and medium-sized nitrogen users. PSA nitrogen production has become the preferred method for small and medium-sized nitrogen users.

Membrane air separation for nitrogen production

Using air as raw material, under certain pressure conditions, different gases with different properties such as oxygen and nitrogen are used to separate oxygen and nitrogen in the membrane with different permeation rates. Compared with other nitrogen production equipment, it has the advantages of simpler structure, smaller volume, no switching valves, less maintenance, faster gas production (≤ 3 minutes), and convenient capacity expansion. It is particularly suitable for small and medium-sized nitrogen users with nitrogen purity ≤ 98%, and has the best functional price ratio. When the purity of nitrogen is above 98%, its price is more than 15% higher compared to PSA nitrogen generators of the same specifications.

Application of nitrogen generator:

Electronics industry: used in the manufacturing of monocrystalline silicon and diffusion processes for integrated circuit production, as well as the production and manufacturing of light-emitting diodes and LD liquid crystal displays.
Metallurgical industry: applied to intermediate annealing and finished annealing of precision copper strip and steel strip.
Mechanical industry: Annealing process applied to bearings and precision mechanical parts.
Powder metallurgy industry: applied to the sintering process in powder metallurgy.
Tungsten and molybdenum reduction industry: hydrogen deep reduction process for four tube furnace, multi tube furnace, and reduction furnace.
Used for bright annealing of precision stainless steel plates, stainless steel pipes, carbon steel pipes, and carbon steel plates.
Sintering of stainless steel powder metallurgy with hydrogen gas for protection