Belt thickener is a device for the mechanical continuous dewatering (thickening) of various types of media or sludge (from wastewater treatment plants and industrial processes) before further processing of the thickened component, for example, with a belt press, and recycling the liquid component (filtrate) – for instance, as rinse water.
Technical requirements
- Voltage system: 3 + PEN ~ 50Hz, 400/230V, TN – S,
- Utility water (flow rate 2-3 m3/hour, pressure approximately 0.3 MPa), optionally with filtrate
- Connection to the chemical system (if required according to the technological process, e.g., for flocculant)
- Compressed air connection minimum 6 bar
The operating principle
Material intended for thickening is introduced:
- directly onto the hopper (without the addition of flocculant)
- through the mixing gutter (where sludge is mixed with a flocculant solution)
- through a high-speed mixer (where sludge is mixed with a flocculant solution)
The sludge (sludge with flocculant) is directed onto the filtration belt, where dewatering begins. Free water flows through the belt, accumulating in the filtrate tank, while the thickened material remains on the filtration belt and moves with it from the tensioning roller towards the drive roller. At the drive roller, there is a scraper that separates the thickened material (which can be further processed, e.g., with a belt press). The water that drains due to gravity collects in the collection container under the thickener. From the collection container under the press, water drains by gravity or can be reused for rinsing the filtration screen (of the device itself or another in the dewatering line), thus recycling it.
Modifications
Belt thickener can be manufactured in several modifications:
- Modification without a protective shutter
- Modification with a protective shutter
- Modification without a base
- Modification on a stainless steel base
Type table
Based on the parameters, it is possible to select the thickening equipment that is ideal from both functional and energy perspectives. In addition to the standard type, we can customize the equipment according to customer requirements. The input factors to consider when selecting the equipment are:
- Dry matter – (ideally send for analysis to Vanex)
- Organic matter content – (preferably send for analysis to Vanex)
- Capacity (m3/hour) – flow of material intended for processing
- Flocculant – determined based on analysis
Input factors to consider when selecting the equipment are:
- Dry matter
- Filtrate
