purpose

The ZBXN type sludge suction machine is used in circular secondary sedimentation tanks of sewage treatment plants to scrape and collect the sludge settled at the bottom of the tank to a set of suction pipe openings arranged along the radius direction, and then discharge it through the central discharge pipe for sludge reflux or concentration dewatering. At the same time, the floating slag on the tank surface is directed towards the slag hopper and discharged outside the tank through the slag hopper for further treatment.

feature

The ZBXN series suction machine is a new generation suction machine designed based on the digestion of imported equipment, with the following significant features:

1. Simple structure and light weight: Due to the use of a half bridge type, there is only one set of driving device, and the main beam also serves as a mud conveying tank. Compared with the widely used full bridge suction machine in China, the weight is significantly reduced;

2. Save operating costs and facilitate maintenance and management: Due to the use of siphon pipes to discharge the sludge from the sludge tank through a non rotating central sludge tank to the central discharge pipe, there is no dynamic seal, which eliminates short flow during cleaning at night. This not only avoids the waste of energy consumption of the reflux pump, but also ensures the concentration of the reflux sludge, creating conditions for the normal operation of the biochemical process. At the same time, it also eliminates maintenance work caused by dynamic sealing;

3. A new type of transmission device can be selected, and the key component reducer in the drive device adopts an advanced shaft mounted type, which does not require centering or coupling, has a compact structure, high efficiency, and light weight;

4. An over torque protection mechanism can be configured, which automatically alarms and shuts down when the torque reaches the set value, ensuring safety and reliability.

Construction and working process

The ZBXN series suction machine, as shown in Figure 1, is a peripheral transmission siphon suction machine, consisting of a main beam that also serves as a mud conveying tank, a suction pipe system, a siphon evacuation system, a central mud tank, a central rotary bearing, a driving device, a skimming device, a current collector, a control cabinet, etc.

The main beam is driven by a peripheral driving device and rotates around the central axis of the pool. The sludge deposited at the bottom of the pool is scraped and collected by a scraper plate to each suction port. Under the action of the liquid level difference, the sludge is discharged into the sludge pit through the suction port, sludge conveying tank, siphon tube, central sludge tank, and central sludge discharge pipe. Each suction pipe is equipped with a regulator at the upper end to adjust the flow distribution of each suction pipe. At the same time, the floating slag on the liquid surface concentrates in the gradually shrinking area formed by the skimming plate rotating with the main beam and the surrounding floating slag baffle, until it closes the edge scraping swing arm. When the swing arm reaches the slag hopper, it is scraped to the mud hopper by the scraper plate on the swing arm.

Electrical control

The start, stop, and operation time of the device can be set according to user needs, and it can be equipped with a PLC interface.