1. Harm of Steel Wastewater Filter Press
Metallurgical enterprises produce a large amount of oily wastewater during the steel rolling process. The wastewater mainly contains organic or inorganic impurities such as emulsified oil, degreaser, lubricating oil, surfactant, sulfide, SS, Fe, acid and alkali. According to statistics, the external drainage of my country's iron and steel industry accounts for about 10% of the industrial wastewater. Therefore, proper treatment of steel industry wastewater is of great significance for solving water pollution, protecting and saving water resources.
2. Application of Steel Wastewater Filter Press
A steel production company in Liaoning selected the high-pressure diaphragm filter press produced by Sudong through various comparisons. The main difference from the current ordinary chamber filter press is that the two sides of the filter plate are integrated with elastic diaphragms. During operation, when the feeding is finished, the high-pressure fluid medium can be injected between the filter plate and the diaphragm. At this time, the entire diaphragm will swell and squeeze the filter cake, so as to achieve further dehydration of the filter cake and reduce the moisture content of the filter cake.
3. Advantages of Steel Wastewater Filter Press
When the feed size of the filter press is coarse and non-viscous, the filtration resistance is small, and the filtrate will not be discharged for a short time and the feed will be terminated. The unloading of the ordinary filter press is relatively easy. However, for the filtration of compressible materials with fine particles and high viscosity, the use of ordinary filter presses will cause high water content in the filter cake and extremely low shedding rate of the filter cake. Even if it is manually processed, part of the adhering material cannot be dropped in one piece and unloaded. The cake is very difficult, and the filter cloth needs to be washed before the next cycle can be carried out, resulting in high manual labor intensity and long unloading time.
Diaphragm filter press is used for the treatment of sewage from steel mills and steel wastewater. After the feed is terminated, it will enter a short press and filtration process to make the diaphragm bulge and press the filter cake for further dehydration; the diaphragm bulges and compacts the filter cake , In the process of unloading, the filter cake has low moisture content and can basically fall off cleanly, so as to complete the unloading process in a short time. It improves the labor efficiency of the material, especially for the filter cake that needs subsequent drying treatment, which will save a lot of energy consumption.