OR-TEC Xpress - Model 2 and 3 -Belt Press

The xpress2 double belt press system configuration features two dewatering belts with a variable wedge zone for optimized dewatering. One button automatic start-up and shutdown, automatic belt tracking and a sludge cake monitoring system come standard and make operation straightforward and easy. The belt press can be supplied as a mobile unit and is compact enough to fit on or in a trailer that can be hauled with 1 ton pickup truck.

The xpress3 is a three belt dewatering system. The unit has a independent gravity belt thickening zone. This gravity zone allows sludges to be pre-thickened prior to dewatering. Because the gravity zone is independent it can be operated at different speeds from the dewatering section of the belt press. The independent gravity zone is then followed by an independent double belt press section where the thickened sludge is further dewatered. The xpress3 triple belt press is particularly useful for operations with sludges with lower inlet solids concentration or where pre-thickening is critical.

The belt press is constructed entirely of stainless steel and can be provided as a stand alone unit or as a complete turnkey system with all equipment required for dewatering, factory mounted, piped and wired on a stainless steel skids.

• Gravity Zone with plows and dewatering roller
• Variable Wedge or low pressure zone
• High Pressure 5 roller squeezing zone
• Auto start-up, run and shutdown
• Automatic Belt Tracking
• Sludge Cake Monitoring System
• No Hydraulics
• Optional three belt configuration

• Fully automated easy to use Touchscreen Controls
• Skid mounted, turnkey, factory tested complete system
• Stainless steel frame, flocculation tank, mixers, rollers, pans, trays and fasteners
• Highest quality pumps, motors and geardrives
• OR-TEC designed and manufactured Polymer Dosing system and Screw Auger ensures 100% equipment compatibilty
• Onboard flow meters
• Available with SCADA ready controls
• Many other features and configurations available

All OR-TEC Belt Press Systems are designed, engineered, manufactured and assembled in the USA

Chemical Dosing

An OR-TEC Blend emulsion polymer feed system automatically makes up and delivers the polymer and water solution to the injection site. As an alternate, a solution of suitable polymer is made up in a stainless steel chemical mixing / storage tank. The tank is usually designed with a capacity for one day?s operation of the system.

Flocculation

Sludge is pumped to a stainless steel flocculation tank by a variable capacity pump. Prepared polymer is simultaneously injected to the inlet of the flocculation tank by a variable speed chemical dosing pump. Here a thorough mixing occurs that is aided by a variable speed flocculator fitted in the tank. Speed adjustments are manual.

Gravity Drainage Area

Flocculated sludge flows from the flocculator down a sludge feed chute. This chute provides a gentle and even distribution of sludge over the gravity drainage section and a uniform thickness on the dewatering belt. The drainage area allows for the separation of the free water contained within the sludge and its consequent discharge into the drainage tray. Capillary action takes place as the dewatering belt moves across tracking and pressure rollers. The drainage area is sealed by polypropylene skirting that is bolted to the top trays and rests on the filter cloth.

Roller Pressure Dewatering Zone

Further liquid removal is achieved as the belt and sludge are pressed between a series of rubber covered rollers. Gradually the sludge is squeezed by adjustable rollers that have been preset during commissioning.

Sludge Discharge

Dewatered sludge is continuously removed by a fixed scraper blade acting against the final roller and allowed to fall into a horizontal stainless steel conveyor. The conveyor can transport the sludge cake to the outside of the building. Sludge cake can also be elevated with a stainless steel inclined screw auger for discharge to a waste hauling vehicle for off-site removal. A dry cake pump can be used as an alternative to the conveyor or auger.

Filter Belt Washing

The filter belt is continually washed by pump generated high pressure water sprayed through fine nozzles. Belt wash water and filtrate are collected in a stainless steel drainage tray. This runoff is funneled to the customer?s drainage system via the supplied 4" diameter flanged outlet in the tray. In most cases, the filtrate is acceptable as reuse for wash water, as is the final effluent of the W.W.T.P.

Controls

The system can be automatically controlled. Start-up is simple and requires a minimum of time. The unit?s design, incorporating variations in both speed of the main elements and in roller pressure, offer a high degree of flexibility to the end user.