Why does the pretreatment effect of reverse osmosis RO ultrapure water equipment deteriorate?
Why does the pretreatment effect of RO ultrapure water equipment deteriorate? Author: pretreatment process can be said to RO reverse osmosis ultra-pure water equipment is very important part, ultra-pure water equipment RO reverse osmosis in the core system before water protection, poor pre-treatment process will affect the entire anti Penetrate the working performance of RO ultrapure water equipment. So, why does the pretreatment effect of reverse osmosis RO ultrapure water equipment deteriorate? Generally, the reasons for the poor treatment effect of the pretreatment process of reverse osmosis RO ultrapure water equipment are summarized as follows: 1. The filter diameter is too small or the filter layer is too low. The depth of the penetration of the particulate impurities in the pretreatment filter is mainly determined by The particle size of the filter material, under the same operating conditions, the larger the filter diameter, the greater the depth of the particles penetrating the filter layer, and thus the higher the dirt interception capacity. At the same time, it can effectively extend the filtration cycle. In addition to increasing the filter The height of the layer is also conducive to the dirt interception capacity of the filter layer. 2. The shape of the filter material and the porosity of the filter layer The shape of the filter material will affect the surface area of u200bu200bthe filter material. The larger the surface area of u200bu200bthe filter material, the greater its dirt interception capacity and the higher the filtration efficiency. Such as the use of multi-angular broken particle filter material, due to its large surface area, which can improve the filtration efficiency of the filter layer. Generally speaking, the surface area of u200bu200bthe filter material is inversely proportional to the porosity of the filter layer. With large pores, the filter layer has a large dirt interception capacity, but the filtration efficiency is low. 3. Filtration flow rate The filtration rate generally refers to the speed at which water passes through the air filtration equipment when there is no filter material, also known as the 'empty tower speed'. The filtration speed of the filtration equipment should not be too slow or too fast. The slow filtration rate means that the output per unit filtration area is small. Therefore, in order to achieve a certain output, the filtration area must be increased, which will greatly increase the investment. Too fast a filtration rate will reduce the quality of the effluent, and the filtration cycle will be shortened due to the large head loss. When filtering water that has been coagulated and clarified, the filtration rate is generally 8-12m/h. 4. Uniformity of water flow During the filtering or backwashing process of the filter equipment, the water flow along the filter section is required to be evenly distributed, otherwise it will cause bias flow and affect the filtering and backwashing effect. In filtration equipment, the water distribution system has the greatest impact on the uniformity of water flow. In order to make the water flow uniform, a low-resistance water distribution system is generally used. The above is the reason for the poor treatment effect of the environmental protection reverse osmosis RO ultrapure water equipment pretreatment process, I hope it will be helpful to everyone.
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