Manufacture concrete 365 days a year, in hot or cold weather. Complete water systems are available to meet your production requirements providing you with cool water for hot weather or hot water for cold weather.
CTE Direct Contact Water Heating for Concrete Plants
The CTE direct contact gas fired water heater produces water instantaneously. There is no fuel consumed for warm-up or idle time. No energy is lost through steam conversion or within a direct contact heat exchanger. Virtually all of the fuel energy is transferred to the water.
CTE technology has rapidly become the new standard in energy savings.
Incoming water is introduced into the top of the direct contact water heater through a series of calibrated dispersion nozzles. Cold water travels down through a bed of multifaceted stainless steel packing rings which break the water into smaller and smaller droplets.
A burner is mounted on top of the direct contact unit, firing downward through a centrally located flame tube. The flame tube is cooled by incoming cold water, and all of the fuel gasses are consumed within this flame tube. The design allows all combustion to take place within a dry and cool direct contact environment, and produces very low levels of nitrous oxide (NO) and carbon monoxide (CO).
Heat from the flame enters the lower chamber from the bottom of the flame tube, and travels slowly upward through the packing rings. Efficient direct contact heat transfer occurs as the descending water comes in contact with the rising hot gasses as both pass through the bed of packing rings in opposite directions.
This “rain” of hot water then falls into the lower chamber and is pumped out to a storage tank. Water temperatures up to 185*F are available within a minimum of 30 seconds after the unit starts. Outlet water temperature is set with a valve controlling the incoming water flow.
More incoming water results in cooler outlet water temperatures, and less incoming water produces hotter outlet water temperatures. The products of combustion are vented out of the top of the direct contact unit, and this exhaust is typically within a few degrees of incoming water temperature.
As compared to the traditional method of using ice to cool concrete, these chillers are able to save as much as 95% per yard of concrete dramatically reducing production costs. Also, all of the problems associated with manual handling, storage and supplying ice are eliminated to cut labor costs. Our chillers allow for precise control for both water temperature and the volume of water going into the concrete mix, to ensure consistency.
We can CHILL water to temperatures from 65°F to 35°F at a cost as low as $0.09 per yard.