As we all know, in sludge treatment, the first thing that comes to mind isFilter pressAnd centrifuges, of which filter presses are the most popular among users. Filter press equipment has the advantages of many varieties, complete specifications, convenient maintenance and reasonable cost. Including: belt filter press, plate and frame filter press, diaphragm filter press and other different types, with different characteristics. Recently, the belt filter press has been going on? What's wrong, let's ask Sudong filter press to talk about it!
Before this, many people were puzzled, why did the belt filter press get involved? In fact, it is not that serious. It is just for the operation of the belt filter press to assess the quality of the dewatered sludge.
(1) Moisture content The operation of the belt filter press is related to the moisture content of the inlet sludge. The moisture content of the inlet sludge is low and the processing cost is relatively economic. On the contrary, the moisture content of the inlet sludge is high, and the processing cost is high. The moisture content of the influent sludge should be controlled between 95% and 96%, which is more economical. The moisture content of the sludge after dehydration is an important indicator to measure the quality of the entire dehydration process. If the moisture content of the dewatered sludge is low, the whole process is considered to be better, and the quality of the dewatered sludge is relatively high. But too low water content will increase the cost of the whole dehydration. The index for controlling the moisture content of the belt filter press is 70% to 78%.
(2) Recovery rate The percentage of the ratio of the total solids of the sludge after dewatering to the total solids of the sludge before dewatering. In the dewatering process, if there are coagulated sludge particles, the recovery rate is low, and vice versa, it should be around 959/6. Generally, flocculants need to be added.
(3) Cake formation rate During operation, due to the adjustment of various parameters in the dehydration process, the sludge after dehydration cannot form mud cake or the formed cake is uneven. The cake formation rate refers to the entire output On the mud filter cloth, the area of the mud cake accounts for the percentage of the entire area of the mud filter cloth. During the operation of the belt filter press, it is required that the cake formation rate should meet above 90%.
(4) Sludge treatment capacity The sludge treatment capacity of a belt filter press refers to the quality of dry matter that can be processed within a single λ time. The treatment capacity given by the filter press manufacturer refers to the capacity under the rated state The amount of dry matter after dehydration. During operation, the treatment capacity obtained is a mud cake with a moisture content of about 75%. During operation, it should be adjusted according to the mud quality, the flocculation of the agent, and the operation adjustment of the machinery to reach or exceed the rated processing capacity.
In short, the belt filter press is not really a problem, it is just an evaluation of its work. Obviously, the efficiency of the belt filter press for sludge treatment is very high, so it is often used in large sewage treatment plants.