What is the typical consumption level of steam for special valves in coking processes?

This operation is not reliable; it’s turned off too low, which makes coking likely

A new type of special valve that can reduce the gap in threaded pipes, thereby minimizing steam usage； At least 30% ； I just heard an explanation from the manufacturer yesterday.

This post was last edited by lupg on 2021-11-30 12:22. Lao Yao: 1. I’m not sure which coking specialty valves you consider to require steam conservation 2. As is our* usual practice, we will first discuss the four-way valve, feed isolation valve, oil-gas isolation valve, and ring valve of the coke tower; the flow rate is expressed in kg/h. 2.1. Four-way valve: approximately 700 for continuous flow, and approximately 180 for intermittent flow. 2.2. Feed isolation valve and oil-gas isolation valve: approximately 90 for continuous flow, and approximately 400 for intermittent flow. 2.3. Ring valve: approximately 300 for continuous flow. 2.4. Note: The intermittent flow rates are values corresponding to one switching cycle (1 minute) converted to an hourly basis. For valves that operate intermittently, no steam is consumed when they are not in use; consumption occurs only during the switching process. The total consumption includes only the continuous flow rate when the valve is in use and the flow rate during periods of interruption due to valve operation. 3. As for the valves at the top and bottom of the coke tower, the flow rate is expressed in kg/h. 3.1. When opening or closing the valves, the flow rate is around 2000; during feeding, it’s around 500–700, and during other times it’s around 100–300. 4. Notes: 4.1. I’m not sure whether the above figures exactly match yours, but I assume that the valve configuration in delayed coking processes is similar, so these figures can serve as a reference. 4.2. The continuous consumption amount is necessary to prevent clogging of the valves and to ensure that they can be opened and closed smoothly over the long term. 4.3. The intermittent consumption depends on the way the valves are operated; for example, increasing the speed of opening and closing can reduce steam consumption. Adjustments can be made based on user experience, taking into account the relevant flow rate ranges. 5. Extra remarks: A quick calculation shows that steam consumption can be quite costly. Over a decade ago, process engineers also used abacuses to calculate costs, and by applying the principles described above, they managed to reduce energy consumption and earn energy-saving awards. But it didn’t take long before the valves became stuck and operations had to stop, returning everything to its original state – naturally, the money saved wasn’t recovered.

The real problem lies in those unnecessary words; failing to view things from a systematic perspective is like focusing on trivial details while ignoring the more important aspects

1 Extra words are nonsense; just laugh: lol. 2 Energy conservation is a strategic approach that involves technical solutions; for example, significant amounts of energy are consumed during intermittent flow or when valves are opened and closed. By using steam control valves to reduce the steam pressure, it is possible to save a large amount of steam while ensuring safety. Regarding the technologies mentioned on floors 3 and 5, one cannot either dismiss them entirely or believe them completely; only by understanding various aspects such as the principles behind them, comparison benchmarks, operating conditions, and the reliability of long-term valve operation can a conclusion be drawn. 4. If it’s convenient, could the old demon provide more detailed information on this new technology? If it really is something good, we shouldn’t miss it.