The compressed air storage tank is one of the most practical components of pneumatic systems and is also known as the air compressor tank or the air pump tank. Despite the high importance of this tank in compressors, it is ignored in some cases. The compressed air tank works in a way that both dries the compressed air and separates some of the moisture and oil in the air. The main task of the compressed air tank is to store the compressed air produced by the air unit of screw or reciprocating compressors.
Tasks of compressed air tank
Storage and cooling of compressed air
Preventing pressure drop in compressors
Increasing compressor performance
Controlling fluctuations and maintaining network air pressure
Reducing compressor maintenance costs
Types of Wind Pump Tank
Normal compressed air tank
Standard compressed air tank
High pressure compressor
The benefits of compressed air tank
Compressed air supply without the need for a larger compressor
Preventing device depreciation
Reducing energy consumption
Preventing condensed water from entering transmission pipes
A variety of pressure sources
Source with air cushion (Air cushion vessels)
Source with rubber diaphragm (Membrane vessels)
In the systems used, there is a need to continue the flow of fluids. This has to be done for a major reason because water is an incompressible fluid and must be present in pumping lines to increase pressure and transfer. This continuity of flow makes a part of the pumping system able to absorb energy in the form of tension or pressure. A pressure source has the ability to store water at a certain pressure and return it to the system when needed.
The process of producing oxygen gas by PSA method
The main steps of PSA absorption separation process are shown in the figure above. In the following, we will describe each stage:
The first stage: Increasing the ambient air pressure through the compressor: In this stage, which is the stage of air compression and initial preparation, the ambient air to the compressors The air is transferred and its pressure increases to a certain level (up to about 8 to 9 bar). Second step: Compressed air passing through the dryer for drying: compressed air after Pass through the dryer (dryer) and water trap, it loses a high percentage of moisture and suspended oil in it.
Third step: Compressed air passing through the activated carbon tower: since that despite the filtration of compressed air, there may still be some oil droplets and moisture in the air, when the air passes through the series microfilters in the active carbon tower (active carbon absorber), the remaining moisture and oil are completely absorbed and the air is completely dry. Clean and compact to the columns of the device It creates oxygen. Fourth stage: Compressed air storage tank: Air enters the storage tank after the preparation process. The air tank installed here controls the volume of air required for the PSA generator and stabilizes this flow. Fifth step: Oxygen gas generator: to produce compressed air oxygen. It enters the tank of the column containing the zeolite absorbent material filled with zeolite called ZMS (Zeolite Molecular Sieve). During the passage of air through the column containing zeolite adsorbent, nitrogen molecules and other impurities in the air are absorbed by the adsorbent; But the oxygen gas is not absorbed and leaves the column. The absorption operation continues until the absorption capacity of zeolite is completed. As soon as the zeolite is saturated by the absorbed molecules, the second tank containing the zeolite starts working and the tank is regenerated under the first pressure. The zeolite regeneration operation is performed by reducing the gas pressure. Decreasing the pressure of the zeolite tank leads to the removal of gases absorbed into the zeolite. After the regeneration of zeolite, the absorption operation continues according to the previous process.
Sixth step: Oxygen storage: The produced oxygen is collected in oxygen collection capsules. In fact, the oxygen storage tank provides a continuous and stable flow of high purity oxygen.