Nitrogen generation unit is a set of equipment that is used to concentrate nitrogen from atmospheric air. The maximum nitrogen concentration at the outlet is 99.9999%. This figure can be corrected depending on the purpose of the gas.
Adsorption generator
Production takes place through pressurized compressed air supplied by a screw-type air compressor. The generator is equipped with a filtration system and a dryer. The air dryer can be of the refrigerator type or adsorption type, depending on the purpose and the required nitrogen concentration. Compressed air undergoes coarse and fine purification as well as a dryer in the production process, whereby it reaches the dew point of +37.4 degrees Fahrenheit and the air class complies with ISO 8573-1:2010-1.4.1. The air is then supplied after a multi-stage filtration process to the generator. At the outlet of the nitrogen equipment we get ready gas at a pressure of up to 10 bar. The station consists of two columns, which contain an adsorbent to absorb the appropriate type of gas. Once every 8-15 years the adsorbent needs to be replaced, depending on operating conditions.
Advantages of nitrogen generators of adsorption type:
- long operating life;
- quick startup / shutdown;
- ease of operation;
- compactness;
- high reliability;
- no need for operator's control during operation;
- full automation;
- possibility of remote control;
Membrane generator
The gasses are separated by a gas separation membrane. The filtered air passes through the membrane module. The flow passes through thousands of selective fibers. Nitrogen exits from the back side of the membrane, and oxygen exits through the membrane walls.
Nitrogen production involves the skilled installation of a complete set of equipment that requires compliance with safety regulations.
The nitrogen production equipment that we supply has components from certified manufacturers and is tested to meet high quality and safety standards for industrial units.
This equipment allows you to achieve high energy efficiency in the production of nitrogen, which is used in various industries:
- эelectronic;
- food;
- metalworking;
- pharmaceutical;
- metallurgy;
- oil and gas;
- petrochemical and chemical industries.
By purchasing nitrogen production equipment in our company, you get favorable prices, warranty, fast delivery and installation.
How to choose equipment for nitrogen production?
In order to choose the type of air separation equipment it is necessary to understand what they are:
There are currently three types of air separation systems for obtaining technical gases from atmospheric air:
- Cryogenic-type air separation systems.
- Air separation systems of the adsorption type.
- Membrane type air separation systems.
Air separation systems of cryogenic type - a complex of equipment carrying out sequential processing and cooling of atmospheric air to cryogenic temperatures and subsequent separation by rectification into components: oxygen, nitrogen, argon, krypton and xenon.
Cryogenic air separation systems are subdivided into:
- Small = up to 1000 SCFH;
- Medium = 1000 ÷ 10 000 SCFH;
- High > 10 000 SCFH;
Adsorption type air handling unit is a set of equipment that separates atmospheric air by passing it through a molecular sieve, which by its structure can hold gas molecules. Adsorption air separation systems are designed to produce the main separation products in gaseous state:
- Oxygen;
- Nitrogen.
The capacity of adsorption systems is not limited and depends on the number of modules used, but there are restrictions on the concentration (purity) of separation products:
- Oxygen gas concentration at the outlet up to 98%
- Nitrogen gas concentration at the outlet up to 99,9995%
Membrane switchgear is a complex of equipment that separates compressed air by passing it through the membrane modules in which the separation into the basic components: nitrogen and oxygen takes place. Membrane air separation units are designed to produce separation products in gaseous state. The capacity of the membrane units depends on the number of membrane modules used.
- Concentration of gaseous oxygen at the outlet is up to 90%.
- The output concentration of gaseous nitrogen is up to 99.5%.
Cryogenic gasifiers are also used to produce gaseous gasses at the place of consumption, which in turn convert liquid cryo-products (nitrogen, oxygen or argon) into gaseous state.
What kind of air separation system is to be used for nitrogen production?
In order to choose air separation system, it is necessary to know the following parameters:
- Consumption of gaseous nitrogen m³/hour;
- Nitrogen pressure, bar;
- Nitrogen concentration, % or oxygen residual fraction;
- Peak consumption, number of "peaks", duration and periodicity;
- Installation options (outdoor, indoor...);
- Existing communications;
- Remoteness from the property;
- The schedule of work (consumption);
- Existence of staff.
Let's look at a visual graph:
In the graph:
- Nitrogen adsorption generators
- Cylinder delivery
- Delivery in liquid or in cylinders
- Liquid delivery
- Cryogenic air separation systems
Selection of a nitrogen source is a complex and demanding task, the efficiency of production processes and the cost of the final product depends on the right choice.
Currently the market of adsorption nitrogen generators is rapidly developing and in the areas where gaseous nitrogen is required this type of generators shows the lowest production nitrogen cost, which is ~0.3 kW per 35 cubic feet of nitrogen.
