Would you choose a sludge dewatering machine?
There are roughly three types of sludge in sewage treatment plants: physicochemical sludge, biochemical sludge, and physicochemical and biochemical mixed sludge. Various types of sludge have different adaptations to dewatering machines. At present, the commonly used models of sludge dewatering machines are: stacked sludge dewatering machine, belt-type sludge dewatering machine, centrifugal sludge dewatering machine, and frame type sludge dewatering machine. The following is a brief introduction to the working principle, issues that need to be considered when selecting, and operating costs. It allows everyone to better choose the sludge dewatering machine that suits them.
1. Stacked sludge dewatering machine:
The filter body is formed by the fixed ring and the moving ring superimposed on each other, and the spiral shaft penetrates through the filter body. The sludge is fully dewatered through gravity concentration and the internal pressure formed by the back pressure plate during the advancing process. The filtrate is discharged from the filter gap formed by the fixed ring and the movable ring, and the mud cake is discharged from the end of the dewatering section.
Its main advantages are: it is not easy to be clogged, because there is no filter cloth, it adopts a multi-overlap spiral filter press method; it saves water and electricity, does not need to be cleaned to prevent clogging of the filter, low-speed operation, low noise and vibration, and safe operation ; Small design, compact design, integration of concentration and dehydration, small footprint, reduced design and construction costs; durable, the body is made of stainless steel, with few replacement parts and long service life.
2. Belt filter press dehydrator:
The upper and lower tensioned filter belts entrain the sludge layer and pass through a series of regularly arranged rollers in an S shape. The tension of the filter belt itself forms the squeezing and shearing force on the sludge layer, and the sludge The capillary water in the layer is squeezed out to realize the dewatering of the sludge.
The belt sludge dewatering machine is less affected by the fluctuation of the sludge load. It also has the characteristics of low sludge water content, stable work and low consumption, relatively simple management and control, and low requirements for the quality of operating personnel. However, clogging is prone to occur. In order to prevent clogging, only a large amount of water can be used for flushing. This not only causes a waste of water, but also a large amount of flushing water increases the burden of the internal circulation of sewage treatment. Moreover, once it is blocked, it must be shut down for maintenance, causing the dehydrator to fail to operate continuously, which affects the normal production and operation of the enterprise or society; and the operating cost is very high.
3. Centrifugal dehydrator:
The centrifugal sludge dewatering machine is mainly composed of transfer and a screw conveyor with a hollow shaft. After the sludge is fed into the drum by the hollow shaft, it is immediately thrown into the cavity of the drum under the action of the centrifugal force generated by the high-speed rotation. The advantage of centrifugal dehydrator is continuous operation, and the slurry can not be concentrated. At the same time, the centrifugal dewatering machine is greatly affected by the fluctuation of the sludge load, and requires a higher quality of the operating personnel.
4. Plate and frame filter press dehydrator:
The plate-and-frame filter press uses the squeeze of the plate frame to discharge the water in the sludge through the filter cloth to achieve the purpose of dehydration. Its advantages are: low price, high solids content of mud cake; disadvantages: intermittent operation, large area and high maintenance frequency.
The above is the introduction of several common sludge dewatering machines in the market. Kintep, as a manufacturer of screw sludge dewatering machines, specializes in producing screw sludge dewatering machines with guaranteed quality and won unanimous praise from customers. If you want to know more about the dehydration machine, then come and pay attention to our website.
