1. Microporous aeration hose
The surface of the variable hole aeration hose is equipped with a pora that can be aerated by the pores, and the pores are narrow and slit, and the width of the air slit varies between 0~200/_an, which is a kind of microporous aerator. The bubble rise rate of variable hole aeration hose manufacturers is slow, the air distribution is uniform, and the utilization rate of oxygen is high, which can generally reach 20%~25%, and the price is lower than that of other microporous aerators. The compressed air supplied does not require a filtration process, and the aeration can be stopped at any time during use without clogging. The aeration hose expands open when aeration is aerated, and is flattened by water when aeration is stopped. The variable orifice aeration hose can be rolled and packed for easy transportation, and the bottom of the pool can be installed without additional complex equipment, but only with the clamping parts.
The inner wall diameter of the aeration hose is 62.5 mm and 65 mm when aerating. Performance characteristics and advantages 1. The wall thickness of the hose is only 2mm, the airway is short and straight, the air pressure loss is small, the inner and outer surface of the hose is smooth, and no biofilm is attached. 2. The hose is swollen when aerated and flattened when it is not aerated and the variable hole is closed when flattened, so it will not be blocked no matter how long the aeration is stopped. It can effectively prevent sewage backflow during intermittent operation.
2. Perforated aeration pipe
Perforated aeration pipe manufacturers are made of steel or plastic pipes, separated by 45 on both sides of the pipe wall. Corner, there are two rows of holes or gaps with a diameter of 3~5mm, the spacing is 50~100mm, the compressed air overflows from the holes, and the orifice velocity is 5~lOm/s.
The price of microporous tube aerator is real, the advantage of this diffusion device is that the structure is simple, not easy to block, and the running resistance is small; the disadvantage is that the utilization rate of oxygen is low, only about 4%~6%, and the power efficiency is also low, only about 1kg/(kW.h). It is less used in activated sludge aeration systems and more in contact oxidation processes. Perforated pipe into a pipe grid, installed at 800~900ram can be used for shallow aeration, at this time the dynamic efficiency can reach more than 2kg02/(kW.h), but the oxygen utilization rate is low, only about 2.5%. Perforated aeration pipe is a widely used medium bubble aeration air diffusion device, with a diameter between 25~50mm.