High Performance DRYCAKE DR Decanter Centrifuge

The DRYCAKE DR Decanter Centrifuges are available in a variety of configurations with capacities from 8M³ to 120M³ including two phase (liquid/solid) and three phase separation (liquid/liquid/solid) designs. This makes the range of DRYCAKE DR Decanter Centrifuges very versatile and capable of adapting to a wide range of industrial and municipal applications. The automated controls also make these machines easy to adjust over a wider range of process conditions and require little operator attention to maintain process parameters.

Standard available automation package feature back-drive controls plus PLC with color HMI and VFD motor controls. Custom automation and programming of additional process controls is available. Complete custom skid packages with common structural steel skid with pumps, sludge conveyor, hydraulic unit, and control panel with all components pre-mounted, wired, and piped for turnkey operation and portability are also available.

1.Available in 2-Phase and 3-Phase design configurations for separation of liquid/solids or liquid/quid/solids

2.The dedicated electronic DPC (Decanter Process Controller) automatically manages the process cycle and safely controls the machine while maximizing the process potential of the DR Decanter

3.Adjustable Liquid discharge level plates are easily accessible and adjusted due to the unique rotating assembly cover design simplifying maintenance and reducing downtime

4.A unique sludge discharge cover scraper assembly prevents sludge from accumulating on the inside of the cover and blocking the solid discharge of the machine

5.Hydraulic and electric scroll back-drive transmission group options including an energy recovery system during machine operation which reduces the energy consumption of the DR Decanter

6.Scroll features a sludge baffle disc which increases the working capacity of the DR Decanter and improves separation performance

7.Four (4) piece machine rotating assembly covers with hydraulic actuators simplifies the operator’s job making inspecting and maintaining the specific sections of the rotating assembly easy and convenient

8.Rotating assembly group is easily extracted from above the machine simplifying maintenance and reducing removal time

9.Head-walls and bowl sections made from high strength forgings and centrifugal castings to improve resistance and homogeneity of bowl structure

10.Scroll features solid stainless steel fabrication to improve resistance, stiffness and longevity

11.Heavy-duty DR Decanter base frame fabrication dampens vibrations and minimizes vibration transmission to the machine mounting structure

12.Forty (40) years of design and manufacturing experience in sludge separation processes assures customer satisfaction and meeting specific process and facility requirements

13.Optional remote monitoring and operational assistance reduces waiting time for resolution of possible problems

14.Replaceable solid discharge erosion resistant wear bushings are easily accessible given the unique rotating assembly cover design simplifying maintenance and reducing downtime

15.Technical service follow-up within 24 hours

16.DRYCAKE DR Decanter Centrifuges allow separation between liquid and solid phases contained within a feed-slurry of industrial or municipal wastewater sludges or other industrial and/or food application

Inlet sludge enters the decanter's bowl through the feed pipe, and the centrifugal force effectively separates the liquid and solid phases. The liquid phase exits through adjustable level plates at the bowl's front, while the solid phase is conveyed by the screw and expelled through exit openings at the rear.

The feed slurry is introduced through an inlet feed tube into the scroll feed zone, where it gains speed and is directed into the spinning bowl. Due to intense acceleration (over 3,000 x "gravity"), solids settle on the bowl's inner wall, leaving a clear inner ring of liquid. The liquid flows through a helical channel between scroll flights, heading to the large diameter end of the bowl, where the clarified liquid is expelled at a controlled depth determined by adjustable liquid level discharge plates.

Efficient, effective, and user-friendly – DryCake Decanter Centrifuge delivers optimal separation results!

DRYCAKE DR Decanter Centrifuges efficiently separate heavy liquid phase, light liquid phase, and solid phases in industrial or municipal wastewater sludges, as well as diverse industrial and food applications.

The feed slurry enters the scroll feed zone through an inlet tube, accelerating into the spinning bowl. Solids, with higher specific gravity, swiftly settle on the inner bowl wall due to intense centrifugal force (over 3,000 x "gravity"), leaving a clear inner ring of liquid phase. The liquid flows helically between scroll flights towards the large bowl end, where the clarified heavy liquid phase is discharged at a depth controlled by adjustable liquid level discharge plates. The light liquid phase exits separately through adjustable nozzles. Both liquid "centrate" phases overflow into their respective discharge covers, gravity-draining from the machine.

Compacted solid phase is discharged by the rotating scroll, conveying solids up the conical bowl section to the discharge ports. Dry solids are expelled into the solids discharge cover, kept free from cake build-up by a scraper.

DRYCAKE DR Decanter Centrifuges deliver optimal separation for various applications – streamlined and effective!

Having the ability to adjust the scroll differential speed and maintain consistent back-drive torque control is essential to optimal performance. In centrifuge operation, the torque on the scroll back-drive expresses the pressure applied to squeeze the liquid phase out of the solid phase. Too much scroll back-drive torque and the liquid will come rushing out the solids discharge, not enough and you won’t get a DRYCAKE. Hydraulic back-drives are typically preferred over electric back-drives because they offer better torque control and a flat performance curve per the graph. However DRYCAKE offers the DR range of decanter centrifuges with a selection of different back-drive transmission types to meet specific customer and / or application requirements.

Adjustable Liquid Level Weir Plates

All other major manufacturers make use of several different bothersome weir plates to change liquid levels. These are usually half-crest moons that are difficult to change and are often lost in storage. DRYCAKE only makes use of one plate. So, when the liquid levels do need changing the plate is exactly where you need it, on the machine. Changing the liquid levels is also easier on the DRYCAKE because of the three section hinged cover, which provided quick and easy access to the weir plate.

Replaceable Sludge Discharge Wear Bushings

The discharge bushings are very easy to replace due to our three section hinged cover and the use of standard tools. We can also rotate our discharge bushings to get more life out of them. The wear on the bushings is always on the same side, so simply rotate the bushing in place 1/4 turn to gain up to 4 times more wear life.

Integrated zero-footprint hydraulic back drive and Reservoir System

One of the biggest concerns we get from operators in regards to hydraulic back drives is the location and connection of the hydraulic tank. Typically a hydraulic unit is placed next to the centrifuges with the hydraulic lines running on the ground to the centrifuge. DRYCAKE has addressed this issue by simply using the legs of the centrifuge as hydraulic tank. This reduces the footprint of the complete supply, and removes any, potentially unsafe, connection lines lying around. In effect DRYCAKE offers.

Sludge Cover Scraper Mechanism

Solids build up in the sediment sludge discharge cover is one of the major reasons that a centrifuge stalls. The DRYCAKE centrifuges are equipped with a separate internal cover scraper and continuous full geared, independently driven low-speed (5RPM) solids scraper to prevent this from happening. The solids cake discharge of a centrifuge is thrown against the internal walls of the sediment sludge discharge cover with a force over 1000xG. Normally, the sediment falls down because of gravity, but with alum sludge and other sticky sludges, the sediment build ups clogging the centrifuge solids discharge.

If the discharge is clogged, no solids can leave the centrifuge, and the bowl of the centrifuge will fill up completely, causing the centrifuge to fault and shut down. It is then necessary to remove the scroll and clean out the bowl. In certain applications, this might require a 30 ton winch to extract the scroll from the bowl. Some other manufacturers also have a scraper but it runs with the bowl/scroll assembly, which results in excessive wear in the scraper blades and can cause increase in loss of balance. Others may use a chain driven scraper motor resulting in sealing problems in the discharge chamber. The DRYCAKE Scraper is fully geared, uses ball bearings, and operates independently from the bowl and the scroll. This feature sets the scraper of the DRYCAKE centrifuge apart from every other major manufacturer.

● The centrifuge is highly automated. After startup, which is automated, the operator can walk away. Usually, an operator is only required to periodically check on the operation of the system to insure proper continued operation.

● The shutdown sequence of the centrifuge is also completely automated – just push a button. The belt press will usually require one half hour of wash down, which is time consuming and messy.

● The belt press takes up more space – the centrifuge takes up considerably less space.

● The centrifuge is totally enclosed. This eliminates odor and mess in the plant.

● Operators can be exposed to aerosols in the air due to high pressure wash of the belt. This does not occur with a centrifuge.

● The belt press uses a continuous flow of wash-water, which adds loading to the plant. The centrifuge does not.

● The centrifuge will normally provide a cake with 2% or higher cake solids than a belt press. The actual difference will depend upon the design and quality of the belt press. A lower cost belt press will produce even lower solids. This adds to hauling and disposal cost. Over 5 or 10 years, this difference can easily pay for the centrifuge.

● A belt press is lower in initial cost than a centrifuge. However, when installation costs are included, system cost will tend to equalize.

● The price for ancillary equipment such as feed pump, polymer system, conveyors, etc. will be the same for a belt press or a centrifuge. Therefore, when the entire system, including installation, is considered, the cost differential is minimal.

● A belt press requires a special foundation. The floor under the press must be sloped to a drain with curbing all around. This adds to the installation cost.

● Why buy a skid mounted or containerized DRYCAKE DR Decanter Centrifuge system? A skid mounted or containerized DRYCAKE DR Decanter Centrifuge system offers additional advantages:

● The skid mounted system has a very low installation cost since the entire equipment package is delivered completely pre-mounted, pre-piped and pre-wired

A skid mounted or containerized DRYCAKE DR Decanter Centrifuge system does not require a special foundation – only requires a flat floor.

All components are tested in the factory before shipment to insure proper operation. This greatly reduces startup time and cost.

Shenzhou Separation and Process can deliver complete skid mounted turnkey decanter centrifuge systems featuring custom automation / control panel, pumps, discharge chutes, pipe work, feed / receiving tanks, polymer systems, skid packages, platforms, and other accessories and options. All DRYCAKE equipment is customizable to project specifications and can be provided with the following Explosion proof electrical options: Class 1 Div 1 and/or Class 1 Div 2.

●Animal Waste Processing

●Biosolids

●DAF Sludge Dewatering

●Municipal and Industrial Wastewater Treatment

●Potato Processing

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