The sludge dewatering machine is a solid-liquid separation equipment made based on the principles of chemical flocculation contact filtration and mechanical kneading. It has a series of advantages such as simple process flow, high degree of automation, continuous operation, simple control operation, and schedulable operation process. Moreover, the sludge thickening tank is omitted, and construction funds are saved to a certain extent, and it is becoming more and more widely used.
The flocculated sludge first enters the gravity dehydration zone, and most of the free water is filtered through the filter belt under the action of gravity; with the operation of the filter belt, the sludge enters the wedge-shaped zone composed of two filter belts. Slow pressure is applied to the sludge, the sludge gradually thickens, its fluidity decreases, and it transitions to the pressing area; in the pressing area, the sludge is subjected to incremental kneading force and shearing caused by the alternating upper and lower positions of the two filter belts Most of the free water and interstitial water remaining in the sludge are filtered out, and the sludge becomes a sheet-like filter cake with lower water content; the upper and lower filter belts are separated by the discharge roller, and the change of the filter belt curvature The filter cake is scraped off with a scraper to realize the solid-liquid separation of the material, and the upper and lower filter belts are washed and reused for the next cycle of concentrated filter press.
The primary technical economic goals involved in the application of the sludge dewatering machine in practical engineering are:
②Moisture content of mud cake,
③Dosing amount of chemical agent,
⑤Flushing water consumption,
⑥ Belt tension,
⑧Operating speed of filter belt
⑨ The primary goal such as air source pressure.
Among them, the processing ability is the primary goal of evaluating the general performance of the sludge dehydrator. There are many factors that affect the processing ability of a sludge dewatering machine, but they are mainly reflected in the gravity dehydration zone, the pressing zone and the running speed of the filter belt, the tension of the filter belt, the roll diameter (size, wrap angle and center distance), and the filter belt (air permeability) The role of selection and dosing scheduling is also a summary of the quality of the machine's structural design and manufacturing.