Precautions when selecting a belt filter press dewatering machine

The belt filter press dewatering machine is equipped with a sludge layer by two upper and lower tensioned filter belts. It passes through a series of regularly arranged roller cylinders and passes through an S-shape. It depends on the tension of the filter belts to form the sludge layer and squeeze it. Shear force squeezes the capillary water in the sludge layer to obtain a mud cake with a high solid content, thereby realizing sludge dewatering.

The general belt filter dewatering machine is composed of a filter belt, a roller cylinder, a filter belt tension system, a filter belt deviation system, a filter belt washing system and a filter belt drive system. When making model selection, it should be considered from the following aspects:

(l) Filter belt. It is required to have characteristics such as high tensile strength, resistance to bending, acid and alkali, resistance to temperature changes, etc. Meanwhile, the specific properties of the sludge should also be considered, and suitable woven textures should be selected so that the filter belt has good air permeability and stain resistance. Mud particle interception performance.

(2) Roller cylinder biasing system. This is usually done by pneumatic devices.

(3) Tensioning system of filter belt. It is also generally controlled by a pneumatic system. The tension of the filter belt is generally controlled at 0.3-0.7 MPa, and the commonly used value is 0.5 MPa.

(4) Speed ​​control. Different types of sludge have different requirements on the belt speed, that is, there is an optimal belt speed control range for any specific sludge. In this range, the dewatering system can not only guarantee a certain processing capacity, but also Get high quality mud cake.

The belt filter press dewatering machine is less affected by the fluctuation of the sludge load, and also has the characteristics of low moisture content in the mud, stable operation and low consumption, relatively simple management control, and low requirements on the quality of the operating personnel. At the same time, as the belt filter press dewatering machine entered the country earlier, a considerable number of manufacturers have been able to produce such equipment. In the decision-making of the sewage treatment project, belt filter presses can be used to reduce the investment in the project. At present, most domestic newly-built sewage treatment plants use belt pressure filter dewatering machines. For example, the first phase of the Gaobeidian Wastewater Treatment Plant in Beijing is a belt filter press dewatering machine, which has its own input, roller press, and filter input. Since the operation was in good condition, this model was still selected during the second stage equipment selection.