Minor modification: Steam issues
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To reduce coking in the settler, it is necessary to modify the settler. At the same time, I want to increase the temperature of the steam used in the reaction from 250 degrees to 380 degrees, and also increase the amount of steam used to prevent scorching. The modification process involves feeding the 430-degree steam obtained from internal heat extraction into a system at 250 degrees through a temperature control valve. The question to be asked is: 1. Can 20# steel pipes withstand steam at 1.0 MPa and 380 degrees? 2. The differential pressure resulting from changing 3.5 to 1.0 is too large; does the control valve require a special design? 3. Have there been any such modifications, and what were the results? Additionally: The purpose of the modification is to coordinate with the centrifugal separation modification of the settler. The soft connection has been changed to a direct connection. I’ll let you all know once I’ve finished the modification. Wish everyone a good mood. This post was last edited by JumpingWind001 on 2009-3-22 at 08:30.]
1. Steel grade 20# can fully withstand temperatures of 380 degrees Celsius. 2. The control valve also does not require a special material. Other plants have also used this method, employing superheated steam from a regenerator as anti-coking steam.
1. For steam pipelines with low pressure, 20# thick-walled pipes are sufficient; for medium pressure, 15CrMo pipes are required. 2. It is advisable to have a pressure reducer before the control valve. For reference only :)
20# steel can withstand 450 degrees, so your 430-degree temperature is no problem. As for the change in differential pressure from 3.5 to 1.0 for the control valve, there should be no problem either, as the heating steam control valves used in our company are set at 3.0; just think about the process of starting to increase the temperature and you’ll understand.
20# steel is fine; if you’re concerned, you can use 15CrMo or heat-resistant steel. A regular control valve will work just fine
1. 20# steel can withstand a steam temperature of 380°C. . . 2. To convert 35 units of steam into 10 kilograms of it, this can be achieved using a temperature and pressure reduction valve assembly; however, it is better to use the exhaust gas from a backpressure unit and then subject it to superheating, as this makes control easier. . .