Gas Cooling
In gas cooling by evaporation (quenching), water mist is injected into the hot gas. Energy is used to convert liquid into gas. In many cases, this involves the flue gases from a combustion process. The water evaporates, quickly cooling the system. When a volume of water is sprayed and broken into small droplets, more surface area is created, which increases the evaporation rate.
Evaporating hot gases
BETE nozzles are used worldwide to improve processes in chemical processing, petrochemical and cement plants, etc. BETE's air quality and pollution control systems provide technical solutions by combining nozzles and lances designed to enhance your process. In many processes, the gas temperature is so high that it can easily damage the installation. The fastest and most effective way to cool a hot gas is by evaporating an injected liquid. The phase change (from the injected) liquid to gas consumes enormous amounts of energy compared to normal cooling.
How does gas cooling work?
An example: heating water from 0°C to 100°C requires about 418 kJ/kg. Converting the same water at 100°C to steam at 100°C requires about 2320 kJ/kg (that’s more than 5 times as much energy). The energy used to evaporate the gas comes from the hot gas, resulting in a temperature drop.
In gas cooling (quenching), water mist is injected into the hot gas. In many cases, this is flue gas from a combustion process. Energy is consumed to change the water from liquid to gas (evaporation), which quickly cools the system. When water is dispersed into smaller droplets, more surface area is created, which can increase the evaporation rate.
The evaporation rate is often critical since the gas must reach the final temperature before a fixed point downstream. The evaporation rate depends on droplet size, temperature difference, residence time, and operating pressure.
Consultancy & customization
We are happy to advise you on the various applications for gas cooling with BETE nozzles. Take advantage of the expertise of our specialists who are eager to think along with you. We are pleased to offer you a customized solution. Please contact us for advice.
