How to reduce temperature
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The drum drain water with a flow rate of 1 t/h (operating pressure of 3.5 Mpa and operating temperature of 243°C) is to be used as the steam desuperheating water at 1.0 Mpa and 240°C; the steam is to be cooled to 210 degrees Celsius. Initially, it was planned to use a desuperheater for this purpose, but the operating temperature of the drain water pipeline is 254°C with a pressure of 4.2 Mpa, so a desuperheater cannot be used. Is it still possible to carry out this project? The owner suggests directly feeding water in through a rotameter to control the flow rate. If this approach isn’t feasible, please explain why. If it is possible, please provide a solution. The current steam flow rate is between 10 and 20 tons, with pipelines of DN 300
It would be best to have a schematic diagram as a reference for the discussion. If the goal is simply to reduce temperature, there are many methods available: it can be achieved by mixing directly with cold water, or through indirect heat exchangers. Those who still don’t understand the question, please explain it clearly.
No images, design commission, that’s it
It’s too expensive to prevent it from going to the heat exchanger
Boiler feed water with a pressure rating higher than 1 Mpa can be directly used for cooling through a mixer. However, even the water temperature in the drainage pipes is relatively high, so it cannot be used directly for cooling to 210°C; it is not certain that the temperature can be reduced to that level. To use the water from the drainage pipeline for cooling, its temperature needs to be lowered.