ENCON Drum Evaporators are electrically heated small volume evaporator available in two sizes. The DE-2 is a batch evaporator (auto-fill option is also available) that can process 200 gallons per 5 day week. The DE-4 is a auto-fill evaporator that can process 400 gallons per 5 day week.
How does it work?
Both models completely encapsulate a 55-gallon drum of wastewater and heats it from the outside, thereby eliminating contact of the heating elements with the wastewater. This makes the ENCON Drum Evaporator appropriate for not only standard wastewater streams that can be handled in other types of evaporators such as Thermal and MVC, but also for de-watering waste streams with high solid loading, such as water based inks, paints, adhesives, and concentrated residue from other ENCON Evaporators.
What are the advantages of ENCON Drum Evaporators?
- Affordable way to de-water small volume waste streams to greatly reduce hauling costs
- Easy to operate
- As it uses a 55 gallon drum as the evaporation vessel, the residue does not need to be scraped and removed. The drum can simply be capped and hauled for disposal.
- Great for waste streams too concentrated for traditional evaporators
- Drum Dryer Option: The ENCON Drum Evaporator can be fitted with an optional Drum Dryer package, enabling the unit to operate in dryer mode to reduce standard drum residue slurry to a dry pile of solids. Please visit the ENCON DRUM DRYER page for more detailed information.
What waste streams can the ENCON Drum Evaporator Process?
The ENCON Drum Evaporator can handle many common waste streams. If your waste stream is substantially water, it is likely to be an excellent application. Visit the APPLICATIONS page for a listing of common applications for ENCON Evaporators.
In addition to the applications that can be handled in all ENCON Evaporators, the ENCON Drum Evaporator is also appropriate for de-watering with high solids loading. This is due to the fact that the ENCON Drum Evaporator heating elements do not come in contact with the wastewater. Examples of these include water based inks, paints, adhesives and concentrated residue from other ENCON Evaporators.
Installation of the ENCON Drum Evaporator is very straightforward and is generally handled by facilities, maintenance, or plant engineering personnel. For auto-fill applications, primary connections include plumbing from the holding tank, sump, or pit to the feed pump and/or inlet valve. Then from the pump and/or inlet valve to the 1' NPT inlet located on the lid of the evaporator. Stacks of varying materials are easily fitted to the exhaust stack with the provided quick connect adapter and ring clamp. The stack is typically installed vertically through the ceiling but can also be run at an angle to a nearby wall then run vertically up the side of the building. Recommended stack materials include galvanized, stainless, or CPVC.
Finally, three phase 240 or 480 VAC power is run to the control panel. All major system components such as control panel, level probes, blowers, thermocouples, and temperature controllers are prewired and tested at the factory.
Below is a typical layout of an ENCON Drum Evaporator installed for automatic fill operation.
Converting Waste Drums to Water Vapor Using a DE-2 Drum Evaporator in Batch Mode Drum Evaporator Batch Operation Step 1:
Place a 55 gallon open top drum onto the drum dolly. Transfer wastewater into the drum to within 6-8 inches of the top. With the evaporator in the full open position, roll the drum into the evaporator. Wrap the rope gasket around the drum so that a positive seal will be made when the clamshell walls are closed.
Batch Operation Step 2:
Close the clamshell walls and secure the lid with latching handles.
Batch Operation Step 3:
The evaporator stack is then connected to the flexible section of the permanent exhaust stack with a quick disconnect fitting.
Batch Operation Step 4:
Run the supply power to the top of the disconnect switch and through the bottom of the control panel enclosure.
Batch Operation Step 5:
With the main power on, allow the system to heat up to boiling temperature. The system will shutdown upon reaching the low level or high temperature set point which is factory set in your control panel.
Auto Fill Option (DE-4, DE-2 with Auto Fill Option):
The ENCON DE-2 Drum Evaporator can be modified to run in the auto-fill mode (optional high level probe required). The ENCON DE-4 only operates in auto-fill mode. This mode requires plumbing from a feed pump to the inlet on the top of the evaporator lid. This allows the automatic and continuous refilling of the evaporator between the height of the two level probes until either the high temperature set point is reached or there is no longer water to be processed in the holding tank (See Typical Drum Evaporator Installation).
The ENCON Drum Evaporators are designed to hold a 55 gallon drum and perform the following features:
- Selector Switch Disconnect on Panel Door
- Digital High Temperature Shut-off
- 316 Stainless Steel Low Level Shut-off
- 316 Stainless High Level Shut-off (DE-4 and DE-2 w/ Auto Fill option)
- Hastelloy C type J thermocouple
- Cycle Timer Shut-off (Optional)
- 316L Stainless Mist Eliminator
- 4' Ceramic Fiber Insulation in Walls
- 2' Ceramic Fiber Insulation in Lids
- Drum Dolly with Industrial Grade Casters
- Flexible Stack Connector with Quick Disconnect for 5 inch stack
Low purchase price and high quality stainless steel fabrication with incolloy heating elements.
Hinged lids and side walls to easily access drum. Auto-fill option to provide unattended operation.
Heating elements do not contact solution and are mounted and insulated on side walls of unit.
The ability to concentrate and dispose of residue in the same drum.
Full function temperature controller to monitor or maintain temperature.
Easy to justify financially.
Ease of Operation.
Maintains energy efficiency without concern for heater burnout.
Minimizes Operator Intervention.
Allows operation as Dryer and Drum Heater as well as Evaporator.