2. Application of disc filter in circulating water filtration
In industrial water, circulating water accounts for 70-80% of the total water consumption. The circulating water system has high flow rate and is difficult to operate, but with low temperature, the water quality requirements are lower than the that of boiler water.
The closed cycle process requires that circulating water is not exposed to the air, with less water waste, and the salt concentration in the water has no fluctuation. It is generally applied in generators, internal combustion engines and single heat exchange equipment with special requirements. In contrast, for open cycle process, circulating water is in contact with air, suspended solid and ion content in water change constantly. Supplementary water and discharge is required.
Disc filters can be used in the following process:
Pretreatment of supplementary water: coagulation, sedimentation, filtration, softening, desalting.
Circulating water filtration treatment: full-flow filtration, side filtration (circulating water volume 1-5%).
Sewage treatment: filtration, desalination and reuse (to achieve zero discharge of circulating water).