senjie new sludge separation equipment in sewage treatment

Classification of filter presses

1: As a mature dewatering equipment, filter press is widely used in the field of environmental protection and has become an important equipment for sewage sludge treatment.

2: Mechanical dehydration of sludge mainly removes capillary water between sludge particles. The moisture content of sludge after ordinary mechanical dehydration is usually 65%-80%, and it is in the shape of a mud cake.

3: Mechanical dehydration equipment used to mainly include belt filter press, plate and frame filter press and decanter centrifuge. Nowadays, chamber filter press, vertical hydraulic filter press, diaphragm machine and high-pressure plate and frame machine are commonly used.

4: When sludge is used for landfill, sludge dehydration can greatly reduce the accumulation space of sludge and save costs incurred during transportation; when composting sludge, sludge dehydration can ensure the smooth progress of composting (during the composting process Sludge is generally required to have a lower moisture content); if sludge is incinerated and processed centrally, a high sludge dehydration rate can greatly reduce heat energy consumption and reduce hazardous material disposal costs.

5: However, sludge has complex composition, low relative density, fine particles, and is often in a colloidal state, which determines its difficulty in dehydration. Therefore, so far, except for ultra-high-pressure vertical hydraulic filter presses, the rest All filter presses add a drying process to reduce the residual oil (liquid) rate.

6: The belt filter press has low power consumption. The moisture content of the filter cake of the plastic plate and frame filter press is low, but the decanter centrifuge has strong adaptability to sludge flow fluctuations, good sealing performance, large processing capacity, and small footprint. In the past, most sewage treatment plants in my country used centrifuges, belt filter presses and plate and frame filter presses. Small sewage treatment plants generally used integrated concentration and dehydration machines. Currently, chamber filter presses, membrane filter presses, and ultra-high-pressure vertical hydraulic filter presses are commonly used. Their unique technology makes them ideal equipment for sludge dewatering.

Belt filter press:

1: It can work continuously. The belt press dehydrator has three working areas, namely gravity dewatering area, wedge press dehydration area and shear press dehydration area. Its pressing type is two-dimensional pressing and is mainly used for sludge dehydration, but Its scope of application is expanding
Plate and frame filter press:

1: Intermittent pressure filtration equipment, used for solid-liquid separation of various suspensions.

2. Chamber filter press: developed after the 1960s. It is characterized by high filtration pressure, the maximum pressure has reached 4.5MPa; a large single-machine filtration area, 2050 square meters of products have been launched abroad, and the domestic maximum filtration area has reached 2000 square meters; the filter cake has a low liquid content, and the filter cake after pressing The moisture content of the cake can be reduced by another 5% to 15%; it has good corrosion resistance, and the filter plate can be made of a variety of reinforced plastics. It is light in weight, has good elasticity, is corrosion-resistant, and has wide adaptability; it has low operating costs and can realize multiple continuous Job, online control.