Psa Oxygen Generator For Offshore Demolition

The PSA oxygen generator, designed specifically for offshore demolition operations, uses pressure swing adsorption technology to efficiently extract oxygen from the air. Its design fully considers extreme weather conditions, and its sturdy outer shell protection and good sealing can effectively resist the invasion of strong winds and rainstorms. It is equipped with professional anti-vibration and shock-absorbing devices inside, and key components are specially treated to adapt to high and low temperature environments. This ensures that in extreme weather such as strong winds and waves, sudden changes in temperature, the generator can still operate stably and continuously produce high-purity oxygen to meet the strict oxygen requirements for cutting, welding, etc. in offshore demolition operations.

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Description

Technical Parameters

Working Principle

Core adsorption mechanism:
zeolite molecular sieve is filled inside. After compressed air enters the adsorption tower, under the action of pressure, the molecular sieve has a stronger affinity for impurity gas molecules such as nitrogen, carbon dioxide, and water, and preferentially adsorbs them. Oxygen molecules are not easily adsorbed and can pass through the adsorption tower smoothly, forming a high-purity oxygen flow at the outlet, realizing the initial separation of oxygen and impurity gases.

Pressure cycle and regeneration:
As the adsorption proceeds, the molecular sieve adsorbs impurities to a certain saturation. In order to restore its adsorption capacity, the pressure in the adsorption tower needs to be reduced to desorb the adsorbed impurity gases such as nitrogen. By periodically switching the pressure state of the adsorption tower, that is, pressure swing adsorption, high-purity oxygen is continuously and stably produced to meet the continuous demand for oxygen in offshore demolition operations.

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Structural design

Corrosion-resistant materials

Due to the high humidity, high salt and strong corrosiveness of the offshore environment, the PSA oxygen generator shell is made of corrosion-resistant materials such as 316L stainless steel, and the internal pipes, valves and other key components are also made of corrosion-resistant materials to resist seawater erosion and enhance overall corrosion resistance.

Anti-seismic and shock absorption

A shock-absorbing spring is set at the bottom of the equipment to absorb energy and buffer impact through elastic deformation. There is a rubber pad at the contact with the support surface, which uses its viscoelasticity to hinder the propagation of vibration. Some high-end models are equipped with hydraulic shock absorbers, which use the flow of liquid in the damping hole to generate damping force and suppress vibration.

Compact and modular

In view of the limited space for offshore operations, the generator adopts a compact modular design, integrating functional modules such as air compression, pretreatment, oxygen separation, storage and transportation. Each module is connected through standardized interfaces and pipelines for easy installation, operation and maintenance.

How does the anti-vibration device of the oxygen generator work?

It works in the following ways
1. Shock-absorbing springs, which are installed at the bottom of the equipment or at the connection of key components, and use the elastic deformation of the springs to absorb vibration energy. When the offshore platform or ship is bumped by wind and waves, the springs will compress or stretch, buffering the impact force on the equipment and reducing vibration transmission.
2. Rubber pads, which are generally placed at the contact point between the equipment and the supporting surface. The viscoelasticity of the rubber can hinder the propagation of vibration, play a damping role, and convert vibration energy into heat energy for dissipation.
Some equipment also uses hydraulic shock absorbers, which generate damping force through the flow of liquid in the damping hole, effectively suppressing the vibration amplitude of the equipment, ensuring the stable operation of the oxygen generator under severe sea conditions, and continuously providing reliable oxygen for offshore demolition operations.

Performance characteristics

High oxygen purity

PSA oxygen generators produce oxygen with a purity of 90% - 99.5%, which can significantly increase the flame temperature during offshore demolition cutting and welding, ensuring the quality and efficiency of operations.

Stable oxygen flow

Available in a range of 1 to 3000 Nm³/hr, depending on actual demand, to provide a stable oxygen supply for large and small offshore demolition operations.

Automatic control

Equipped with advanced system, it can monitor the operating parameters such as air flow, pressure, temperature, oxygen purity, etc. in real time, and automatically adjust the equipment status according to the preset values.

Strong adaptability

In addition to adapting to the harsh offshore environment, it can also cope with different air pressures, temperatures, humidity, etc., and pre-treat the intake air through its own regulating system to ensure that the core components operate in a suitable environment

NTK93 Series PSA Oxygen Plant Model Selection
No.	Models	Capacity (Nm3/hr)	Purity	Power consumption of 1Nm3 oxygen produced (kw/h)	Number of bottles filled in 12 hours (pcs)	Operator needed
1	NTK-5P	5	93%+-3%	3.54	10	2
2	NTK-10P	10	93%+-3%	2.52	20	2
3	NTK-15P	15	93%+-3%	2.31	30	2
4	NTK-20P	20	93%+-3%	2.13	40	2
5	NTK-25P	25	93%+-3%	2.01	50	2
6	NTK-30P	30	93%+-3%	2.09	60	2
7	NTK-40P	40	93%+-3%	1.81	80	2
8	NTK-50P	50	93%+-3%	1.94	100	2
9	NTK-60P	60	93%+-3%	1.62	120	2
10	NTK-80P	80	93%+-3%	1.92	160	2
11	NTK-100P	100	93%+-3%	1.83	200	2
Design basis: Altitude：≤500m;RH：≤80%;Temperature：0℃-38℃;Filling pressure: 150Bar 40L Type Standard Cylinder

FAQ

1.How much can the improvement of cutting efficiency by high-purity oxygen shorten the construction period in actual offshore demolition projects?
This depends on the scale of the demolition project and the amount of cutting work. In a small offshore platform demolition project, if the cutting work accounts for 30% of the total construction period, the use of high-purity oxygen will increase the cutting efficiency by about 30% - 40%, and the overall construction period may be shortened by 10% - 15%. In large ship demolition projects, the cutting work is large and complex. After the high-purity oxygen improves the cutting efficiency, it may shorten the cutting period by 20% - 30%. Taking into account other operation links, the overall construction period is expected to be shortened by 10% - 20%. Of course, the actual construction period is also affected by many factors such as weather and equipment failure.

2. How to reduce material waste caused by cutting defects in high-purity oxygen cutting operations?
High-purity oxygen makes the flame temperature uniform and stable, and the metal melting process is smoother during cutting. This makes the incision width narrower and more uniform, reducing material loss caused by cutting too wide.

3.PSA oxygen generators can provide a stable oxygen flow. What impact does this have on cost control in large offshore demolition operations?
Stable oxygen flow ensures that cutting, welding and other equipment can continue to operate efficiently in large offshore demolition operations. On the one hand, it avoids equipment idling or inefficient operation due to unstable oxygen supply, reduces equipment wear and energy consumption, and reduces equipment maintenance and replacement costs.

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