N₂O plant

Nitrous Oxide Production Plants

Melter

Special grade ammonium nitrate (AN) is charged into a melting unit to homogenize and prepare the raw material for chemical reaction.

Reactor

The resulting liquid is injected into a reactor, where the AN undergoes controlled thermal decomposition into nitrous oxide and water vapour.

AN filter

The nitrous oxide and water vapour flow through an AN filter, where the AN content of the gas will be removed.

Condenser

The produced gas is cooled, and the water vapour is condensed in a counter-current water-cooled condenser.

Washing towers

In the next step, the N₂O gas-stream undergoes a series of purification steps and enters the washing towers. Purification is performed in these towers by washing the gas with utility water and chemical solutions.

Gasholder

The purified gas is accumulated in a gasholder.

Fine dust filter

The gasholder feeds a water-cooled compressor through a fine dust filter

Compressor

The compressor is equipped with an appropriate heat-exchanger, inter-coolers, after-coolers and separators. The compressor compresses the gas to liquefaction pressure

Dryer

The produced N₂O process is liquefied and stored after drying.

Modular, Skid-mounted equipment

Skid mounted means that the plant units are fixed on a platform and covered with a frame. The units are connected, and the control system also included into the frame. The installation and start-up require the local utilities and the raw materials.

M80
80 kg N₂O / hour
650 tons/year

M50
50 kg N₂O / hour
400 tons/year

M25
25 kg N₂O / hour
200 tons/year

Separated units equipment

Separated elements means that the plant units have a fix dimensions, but the layout of the complete plant roughly free owing to the different length ad shape of the connection tubes between the units. The installation and start-up process are require more time and some of the connections are only finished on Customer’s site

S300
300 kg N₂O / hour
2500 tons/year

S200
200 kg N₂O / hour
1600 tons/year

S130
130 kg N₂O / hour
1000 tons/year

Standard production Quality

2.5 Grade (99.5 Vol. % N₂O)
This grade is suitable for Medical purpose or for further
purification with Ultra High Purity unit.

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Control system of the Equipment

Relay:

Basic version is using
“Relay” control logic

Relay/Digital:

Hybrid unit – Relay controll
+ PLC monitoring + Digital reaction control

Digital/SIL:

Advanced version is
controlled by “PLC” and has
(Safety Integrity Level)
SIL II safety

PLC controlled Equipment User Interface

For N₂O plant with PLC control we provide local HMI and professional Computer controlled User Interface which includes data logging and trending

Előző

Következő

Produced gas Pressure

Low Pressure Compressor
and Drying unit

16…20 barg
(operation pressure: 17…19 barg)

High Pressure Compressor and Drying unit

45…70 barg
(operation pressure: 50…65 barg)

Raw material

Ammonium Nitrate (NH₄NO₃) 88…92% concentration with water is required

Solid Ammonium Nitrate

25…50 kg bags
2,02 kg SAN / 1 kg N₂O

Optional automatic SAN feeding system

Liquid Ammonium Nitrate

20…40 tons storage tank
2,25 kg LAN / 1 kg N₂O

Optional LAN storage and feeding equipment

Nitrous Oxide Ultra High Purification Units

The electronic industry requires Ultra High Purity quality Nitrous Oxide. The Ultra High Purification Unit is normally connected to a N₂O production plant and it is purify its product to an UHP Storage tank.

LP N₂O Storage

Low-Pressure Stainless-steel, insulated tanks and it’s additional systems (LQF & VRS). Maximum 22 barg with 11 000 / 30 000 Liter capacity.

UHP Unit

UHP unit cold box built with distillation column and heat exchangers. A vaporizer / vent panel for recovery. And an UHP pump.

LP UHP Unit N₂O storage

For Medical and UHP products, a vertical (22 barg) stainless steel tank is available up to 60 000 Liter capacity, vacuum insulated with all the connection points, required instrumentation and control unit.

Ultra High Purity

The electronic industry requires high quality Nitrous Oxide which has at least 99,999% N₂O content and minimal contamination. For this industrial quality (5.0 or higher) the standard quality gas has to be further purified till it reaches the Ultra-High Purity. The UHP is normally connected to a N₂O production plant and it is purify its product to an UHP Storage tank.

UHP350
350 kg N₂O / hour
2500 tons/year

UHP250
250 kg N₂O / hour
1600 tons/year

UHP120
120 kg N₂O / hour
1000 tons/year

The nitrous oxide from the Low Pressure storage contains approx. 0.2 – 0.5 Vol. % nitrogen and oxygen. At the top of the rectification column, the impure fraction of N₂O sent back to the gasholder contains approx. 4 – 8 % (V/V) N₂ and O₂, depending on feed purity. These non-condensable gases will be eliminated by the venting of the storage tanks of the existing N₂O plant. At the bottom of the column UHP nitrous oxide with a purity above 99.999 Vol. % N₂O is pumped into a UHP low-pressure tank.

The UHP unit has 3 main unit. The Cold-box and the UHP pump has a fix layout, and the Vaporizer with the Vent panel have freedom in case of limited available space.

Ultra High Purification quality

Minimum 5.0 Grade (99.999 Vol. % N₂O) up to 6.0 (99.9999% N₂O)

This grade is for electronic industrial purposes.