Issues with the switches for the bypass and main path of the hydroscoper during lifting and lowering
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I’ve been learning the job from my master lately, but he doesn’t really teach much. It’s frustrating; when you encounter such a master, you have to figure out many things on your own. Question: Our operating procedures state that both the bypass and the main path of the steam trap should be opened during heating; once the temperature reaches 80-90 degrees Celsius, the bypass should be closed and heating should continue. As the temperature starts to rise, why ask whether to use the main route or the bypass? Why was the bypass turned off again later? Question: After the reaction in the reactor is complete, during the cooling process, both the bypass and the main path of the strainer must be closed. Why shut down the main route? Seeking help from kind-hearted people!!!
Question 1: Turning on the bypass during temperature rise is related to the temperature increase itself, that is, the rate of temperature rise. Question 2: Of course, the steam needs to be turned off once the temperature rise in the reaction is complete.
Question 1: The technician’s approach takes into account the factor of thermal expansion; a large temperature difference between the main and bypass circuits is detrimental to the weld seam, so the technician’s method is correct. Question 2: The correct answer has been given above.