WASTE NOT, WANT NOT

Attempts to modify existing spiral and tube-and-tube heat exchangers to prevent exchanger plugging or baking in heat recovery applications for wasted industrial process and municipal-sludge digestion have largely failed. The inherent design of the rectangular- channeled heat exchanger imparts specific benefits: * It includes channels with 3" or more height gaps for each of the liquids. ˜ is helps reduce the risk of plugging. * ˜ e design allows the width of the channel to have a fast ° ow rate of 3 ft/ sec minimum. ˜ is also helps reduce the risk of plugging. * Using rectangular-channeled heat exchangers allows the use of liquids with high percentage of solids and high fluid viscosity in both sides of the heat exchanger. * This type of technology provides more heat transfer for the same flow. (By contrast, round tube has the lowest surface heat transfer area compared to any shape.) Having a larger heat transfer area provides positive benefits * Special systems enable users to clean both liquid sides quickly. * Doors or gaskets are not required. * Therectangular-channel technology offers the double-wall design as required by law for gray or black water recovery. * Having outside bends increases the turbulence and lowers the risk of struvite occurrence. * The counterflow design helps improve heat transfer. * Insulating the units can improve the heat transfer and safety. * Rectangular-channeled heat exchangers are smaller in size than tube-in-tube exchangers. * The design provides the ability to have two heat exchangers in one frame.