The Reason of the Low Efficiency of the Thickening Tank

Update:05-12-2018
Summary:

The thickener is mainly used in working environments re […]

The thickener is mainly used in working environments requiring solid-liquid separation such as leachate concentration and wastewater treatment. Early concentration efficiency and processing capacity were not good, and frequent problems, such as poor sedimentation effect, were prone to "running rough", large overflow water content and low underflow concentration, mainly due to technical and design problems. Below Zhejiang Golden Machinery Factory R & D experts simply explain which design affects the processing effect of the thick machine:

First, the design of the settlement tank structure.The settlement trough is shallower. Normally, the production capacity of the settling tank is independent of the height of the trough of the settling tank, and only depends on the speed of the settling tank and the settlement area of the tank. If the groove is shallow (≤3.1m), the sedimentation speed will gradually decrease as the density of the slurry increases during the process of falling. When the interface reaches a critical speed in the groove, the position of the section will as the feed and slurry properties change, it is difficult to control its concentration. Because the solid particles in the tank are not free to settle in a stationary liquid state.

The overflow groove is set inside the groove. The earliest thickener used a built-in overflow channel device, which was 8.15m high from the top edge of the trough and covered by wood. During the operation, the staff could not observe the overflow ditch. The sediment inside can not be cleaned up in time. After a long time, the overflow ditch is easily submerged, resulting in the loss of overflow.

Second, the scraper device design. At the earliest, the scraper device of the deep cone thickener was designed with two pairs of I-beam short and short scraper arms. The long and short scraper arms were installed in a cross shape, and there was a gap between the scrapers on each scraper arm, and the length of the scraper arm was The squeegees are interlaced. During the process of scraping the slag, the surrounding slag is in a static state, and the resistance of the slag is very large. The distance of the slag is very small, so it takes a long period of scraping to discharge the slag. The scraping efficiency is very low.

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