Examples of DSI in Industrial Processes
DSI is superior to indirect exchangers for heating water in industrial applications because it provides a rapid response to changing process conditions and enables precise temperature control within a single degree C.
DSI heating is suitable for many industrial processes. Here are a few examples from different industries.
Many processes in the chemical industry require water temperature to be precisely controlled before adding it to a batch process. A DSI System provides instant temperature control, reducing the cycle time and increasing productivity. DSI is also ideal for dispersing gas into a liquid, mixing two condensate steams or heating a large-capacity, closed-loop jacketed vessels, tanks and blenders, as in this example.
In food processing, hot process water at variable demands is required for applications like plant sanitization, CIP, batch hot water, pasteurizing, bottle, belt, tote and case washing and hose stations where instantaneous and accurately controlled hot water must be available to meet stringent plant demands. Here is an example of a central hot water system for plant hose station service.
The energy and power industry uses DSI in numerous applications, including reverse osmosis (R/O) systems used in the treatment of boiler feed water, and FGD hot slaker water for SO2 emissions reduction. DSI systems are more compact than indirect heat exchangers, giving designers much more design and installation flexibility. Here is an example of a DSI application for a hot water resin bed regeneration system.
In pharmaceutical processing, DSI technology is used in such applications as the continuous-flow treatment of bio-waste. The precise temperature control enables living cells to be killed or inactivated, then cooled before disposal. For example, one waste steam inactivation system required the waste from multiple reactors to be heated to 140° C, held for a period of time, then cooled to 60° C. Read more about waste inactivation here.
Other general industrial examples include parts washers, slurry heating and filter back flushing.