In industrial sewage treatment processes, exposure gas is one of the important steps in the active sludge approach, mainly the oxidation of organic matter in sewage using exposure devices in exposed pools, a process that is often costly to run, and the choice of suitable exposure devices can effectively control the operating costs of industrial sewage treatment equipment. What are the common types of effluent treatment exposure units
I. Micro-pore exposure devices
The oxygen use of micro-pore exposed gases is high, and new products can reach more than 30 per cent of the 6 m clean water. But it's impermeable and has a short lifespan. Micro-pore-exposurers can increase wind pressure and energy consumption after a certain period of time is spent as a result of mud-blocking, and the use of oxygen can be drastically reduced after damage, requiring timely replacement。
1. Micro-pore exposure principles
A wind machine provides a source of gas, air is transported through the main, sub-pipes to each of the emitters set up on the pipe, and the micro-pores on the film are opened by wind and the air is quickly released into the water。
Micro-pore exposure characteristics
(1) high-speed upwelling water flows in the open vents of the exposed air centre, resulting in heavy mixing and collisions of gas, water and mud, reducing the compression effect of the exposed air column and high oxygen utilization, as a result of greater weight differences between the soda mixture and the water during exposure
(2) the rapid mixing of air, water and mud is enhanced by the high upswing speed of the vents at the centre of the exposure and by the intense suction of the bottom sludge, which reduces sedimentation of the bottom mud and is good
(3) the exposure of the head-damp is based on arc structure, which is effective in reducing the stress of the film and reducing the fatigue of the film, while at the same time connecting the film with the bottom, effectively preventing the fall-in of the mud and significantly prolonging the useful life of the exposed head of air when the gas stops。
Ii. Flow-exposure devices
Emission units are an early exposure process for industrial effluent, with advantages such as large service areas that are not easily blocked. The oxygen utilization rate in the 6 m clean water stream is about 15 to 21 per cent. Fluid exposure requires circulation pumps, which are more energy-intensive. In calcium-containing wastewater, nozzles are prone to blockage。
1. Emission principles
Emission is a high-speed mixture of liquid currents that are pumped into the water pump to form a negative pressure-inhaled air, air and mixed fluids which are heavily disturbed in the larynthetic tube, crushing the bubbles, further compressing the fine bubbles in the diffuse tube, rapidly transferring oxygen to the mixture, thus mixing with the pool water and increasing oxygen content in the water。
2. Emission characteristics of currents
(1) simple construction and ease of installation
(2) the nozzle is large in diameter, is not susceptible to congestion and is easily maintained
(3) the use of self-suction to save equipment such as windmills at low cost and with low noise
(iv) short exposure time, small land area, ministry of state investment
(5) inefficient power, high operational energy consumption and more than 70 per cent energy consumption by water
(6) where the water quality changes significantly, the oxygen content is not easily regulated。
Iii. Truncated exposure devices
Rotating exposure devices are a new exposure process that has emerged in recent years, with oxygen utilization being tested at about 18 to 23 per cent in 6 metres of clean water. Large-scale applications in the field of industrial wastewater have been initiated in recent years because of uninterrupted production and installation, life expectancy of more than 10 years, lack of congestion, stable wind pressure and moderate energy consumption。
1. Drift exposure principles
When the cyclone exposed air unit operates, the wind vents ejected high-flow wind and sucked up the bottom water. Windwater mixed flows form two fluids in different directions through cross-cutting slices, rising with continuous collisions with cutting components, resulting in small bubbles of oxygen to the water body。
2. Turbulent exposure characteristics
(1) the flow-exposure unit is mixed, shredded and cut into one, and the gas-water mix works well, resulting in even bubbles and high oxygen utilization
(2) low wind resistance and steady wind pressure, especially when the wind machine is magnetic or airborne, to the smooth operation of the wind machine
(3) the use of flow-exposure devices in the course of their use has decreased to a lesser extent than the use of oxygen from fresh water to sewage, where energy consumption is usually about 15 per cent higher than that of micro-pore new products, while the flow has remained stable as micro-porous oxygen use has declined and good flow has remained essentially the same as the long-term energy consumption of micro-pores
(4) the flow-exposure device uses large holes, which are combined with a thaw structure, with the advantages of large service areas, small resistance, stable operation, unblocked and long service life。
These are the types of sewage treatment exposure units commonly used in industrial sewage treatment equipment, which can be seen to be becoming less and less used as the demand for energy-saving emission reductions in enterprises increases. As a new high-tech water treatment enterprise, luoyang spring water treatment equipment ltd. Has designed the corresponding industrial sewage treatment equipment for a number of enterprises, which is now operating smoothly and generating significant economic benefits for the enterprise, either by leaving a message on our web site or by calling for detailed consultations。
