The working principle of the oxygen increasing machine
Oxygen increasing machine is a kind of machine which is often used in fishery breeding. Its main role is to increase the content of oxygen in water to ensure that the fish in the water will not be anoxic, and it can also inhibit the growth of anaerobic bacteria in the water, prevent the deterioration of pond water and threaten the living environment of fish. In order to increase the oxygen content in water, the oxygen increasing machine usually uses its own air pump to pump the air into the water.
The aerator is a driving component of diesel or electric motor as power source through the air, the oxygen quickly transferred to aquaculture equipment, it can be integrated with physical, chemical and biological functions, can not only solve the pond because hypoxia caused the fish floating head, but also can eliminate the harmful gas, improve fish activity and primary productivity, promote the convection of the water exchange, improve water quality, reduce the feed coefficient, thereby increasing stocking density, increase the feeding intensity of aquaculture object, which greatly improve the yield, promote growth, fully achieve the purpose of increasing farming.
There are many kinds of aeration machines, their characteristics and working principles are also different. The effect of oxygen increasing is quite different. The range of application is also different. Producers can choose suitable aeration machine according to the needs of different farming systems for dissolved oxygen, so as to achieve good economic performance.
The main performance index of the oxygen increasing machine is to increase oxygen capacity and power efficiency. The capacity of aeration is an increase of oxygen per hour to water by a aerator. The unit is kilograms per hour. The power efficiency refers to an aerator which consumes 1 kilowatts of electricity to increase the amount of oxygen to water. The unit is kilogram / kilowatt hour.
Although aerator is used more and more widely in aquaculture, some fishery practitioners still don't know its working principles, types and functions. In practice, they are blind and arbitrary. It is necessary to understand the principle of its work first, so that the method of its use will be grasped in practice. It is well known that the purpose of the use of the oxygen increasing machine is to increase the dissolved oxygen to the water body, which involves the solubility and dissolution rate of oxygen. The solubility includes 3 factors: water temperature, salt content and oxygen partial pressure. The dissolution rate includes 3 factors: the degree of unsaturated oxygen, the contact area and the way of water and gas, and the movement state of water. The salinity of water and water is a stable state of water. It is generally not changed. The degree of oxygen dissaturation is a factor that we need to change, and it is also a current situation of water body. So it is necessary to change the oxygen partial pressure directly or indirectly, the contact area and mode of the water one gas, and the 3 factors of the movement of water. In this case, the measures adopted in the design of an oxygen increasing machine are as follows:
1) the water is dispersed into small droplets, which are injected into the gas phase to increase the contact area of the water.
2) the use of mechanical components to stir water to promote convection exchange and interface renewal;
3) through negative pressure suction, the gas is dispersed into a micro bubble and is pressed into the water.
All kinds of aerator are designed and manufactured according to these principles. They either take a measure to promote oxygen dissolution or take two or more than two measures.