ENCON Evaporators
97 Eddy Road Unit 6
Manchester, NH 03102-3226
Phone: (603) 624-5110
Fax: (603) 627-9520

ENCON Wastewater Evaporator vs. Serpentine Tube Evaporators

Heat Exchanger Longevity:

The heat exchanger for the ENCON Wastewater Evaporator is a Turbulent Flow I encon mmersed Chamber, elevated off the bottom of the evaporator tank. The flame is fired into a large open cylindrical chamber with minimal static pressure. The flame does not impinge directly on any stainless steel or, more importantly, welded joints. Conversly, serpentine tube designs either force or draw the flame through a small diameter pipe. This results in a high static pressure and subsequently a severely elongated flame that impinges on the welded joints. These locations have traditionally been a point of fatigue and failure.

Lower Gas Cost

The ENCON heat exchanger has a significantly larger surface area than the typical serpentine tube evaporator design. This translates to more heat being dissipated into solution and a greater generation of water vapor, resulting in a higher operating efficiency. For example, the ENCON N3Z-126 (126 gal/hr) requires 1,370,000 BTU/hr of heat input compared to one of the competitive serpentine tube designs which for the same 126 gallons/hour evaporation rate requires 1,500,000 BTU/hr. This translates to almost a 10% efficiency advantage for the ENCON Wastewater Evaporator.

Lower Electrical Cost

Since the ENCON Wastewater Evaporator burners fire into an open, low static pressure chamber, the flame lengths are short. Since, a majority of the serpentine tube designs fire into a much smaller diameter pipe, there is a much higher static pressure to overcome. In order to overcome this static pressure, a large blower must be used to either force or draw the flame through the heat exchanger. This results in severely elongated flames, which can be as much as 5-14 feet in length. The blower required can be as much as 5X the horsepower of the blower used on the ENCON system. This results in a much higher electrical energy cost to operate the system compared to the ENCON system.

Easier Heat Exchanger Cleaning

In the ENCON Wastewater Evaporator, the majority of the sediment/residue falls to the bottom of the tank onto a non-heated surface. If material collects on the top of the ENCON heat exchanger, it can be easily accessed and cleaned with a stiff wire brush.The serpentine style heat exchanger consists of horizontally layered pipe, set deep into the evaporator tank. There is no simple tool that will easily clean the outside diameter of a horizontal pipe and the space in between layers is virtually impossible to access for cleaning. The only effective way to clean residue build up from this type of heat exchanger is to remove it from the evaporator tank and sandblast it.

To read what our customers have to say about us Click here >>