Bionomic Qsense uses direct contact to recover BTus from hot gases

Bionomic Industries Inc., Mawah, NJ, says its new QSense™ direct contact waste heat recovery system is designed for the economical recovery of waste heat BTUs from boilers, kilns, dryers, ovens, thermal oxidizers and incinerators.

QSense’s highly-efficient counter-current-flow exchanger typically provides a full saving payback within one to three years for most applications, says the company.

The recovered heat can be used to preheat boiler feed water, meet or supplement building space heating requirements or for heating process heat transfer fluids.

Both sensible and latent heat are recovered for maximum recovery efficiency and, as an added benefit, flue gases are scrubbed to remove any particulate and gaseous contaminants to reduce plant emissions.

The QSense heat exchanger is offered in a vertical configuration for maximum space savings and with all necessary system components. For flue gases containing acid contaminants, the unit can be equipped with neutralizing chemical reagents and for particulate laden streams, a pre-scrubber and clog-resistant contactor is available.

How it Works: Air supplied by a blower (1) is raised in temperature by the heat source (2). The hot gas enters the direct contact exchanger inlet (3) and travels upward through a high-efficiency packed bed (4) with over 30 sq. ft./cu. ft. of active heat transfer surface area. Cool water is introduced at the top of the unit through a liquid distributor (5) where it comes into intimate counter-current contact with the hot gas in the packed bed as it travels downward. Sensible heat transfer between the colder water and hot gas occurs resulting in rapid heating of the water. The heated water drains into the sump section (6) and is pumped (7) through a plate-and-frame or shell-and-tube heat exchanger (8) to reheat returnheat transfer liquid in a complete closed-loop cycle. Cleaned reduced temperature gas now saturated with water vapor exits from the top of the unit (9).

The standard material for the shell and internal components is 304L stainless steel; 316L stainless steel is offered as an option.

The capacity for heated liquid rates is from 5 to 1500 gpm depending on gas volume and saturation temperature within a 2 approach.

Bionomic Industries Inc., www.bionomicind.com

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