The Air Dissolving Reactor is the latest device developed by Krofta. It can be used to dissolve air (or any other gas)in water (or any other liquid). It can also be used to dissolve a mixture of more than one gas into a mixture of more than one liquid.
The ADR consists of a closed cylindrical reservoir inbuilt with a pipe as an entry point for the liquid situated in the upper part of the reservoir. It also consists of a point for the gas to enter from and a pipe for the liquid to exit situated in the lower part of the reservoir.
The liquid’s entry is designed in such a way that it enters the reservoir at a specific velocity. It is set at a tangent to the cylindrical body of the reservoir in such a way that when the liquid is introduced into the reservoir, under the effect of the centrifugal force the liquid creates a spiral, rotational movement around the reservoir’s axis of revolution.
Advantageously, in upper zone of the side wall on the inside of the reservoir are placed a number of slides which extend to the inside of the reservoir and towards the aforementioned inner wall. These slides act as obstacles in the path of the liquid circulating in spirals on the inner wall of the reservoir.
How ADR works
The liquid is introduced into the reactor through the entry point placed in the upper part of the reactor. The liquid is introduced at a determined speed which owing to the centrifugal force allows the liquid to be plastered onto the inner wall of the reactor and thereby be spread in a thin layer. The gas to be dissolved is introduced into the reservoir. This gas forms a pocket in the upper part of the reservoir. The lower part of this gas pocket is defined by the end of the pipe that drains out excess gas.
Regulatory valves are located on the pipe of the liquid’s exit point and on the point from where the excess gas is drained out. This allows the reservoir to be maintained under pressure and to regulate respectively the flow of the liquid flowing through the reactor and the flow of the gas being drained out. This is done in a way to maintain the level of liquid.
While circulating in spirals on the lateral inner wall of the reservoir, the liquid comes in contact with slides which disperse the liquid into the gas pocket. This is how, a larger quantity of liquid dispersed in small drops into the gas pocket offer a much higher surface area of exchange than by dispersing smaller amounts of gas into large quantities of liquid.
Advantages:
• Lower power consumption by approx 25%
• Reduction of head of high pressure pump
• Reduction of recycle flow rate of the high pressure pump
• Higher air dissolution- higher by 20% compared to any air dissolving devise.
