Difference between stop and emergency stop
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I would like to ask: The ash transportation procedure for a silo pump includes: loading, pressurization, transportation 1, and automatic mode. It’s easy to understand: with one-click start, simply press the start button and the program will run entirely automatically from beginning to end. 2. Manual program. My understanding is that it is carried out in three stages based on the process: loading (8 valves), pressurization (8 valves), and transportation (8 valves). When the loading start button is pressed, these 8 valves operate according to sequential interlock logic and stop once loading is complete. It’s not required that all 20 valves need to be operated manually – is this understanding correct? 3. Stop the program. There are also stop procedures for fully automatic mode and those for manual mode – aren’t these two stop procedures different? 4. Emergency shutdown procedure. I don’t understand what’s the difference between this and stopping a program. 5. Debug the program. My understanding is that it ensures that each valve can be manually operated independently, without any interlocks. This is mainly used for individual testing after installation, such as conducting simulated individual tests on each valve, level gauges, temperature and pressure transmitters in the circuit. Is this correct? Thank you for the answer!
What you’re talking about seems to be related to the pneumatic ash conveying system. An emergency stop, as the name implies, is used in case of an emergency; it’s not used under normal circumstances. It’s similar to systems like ESD and ETS, or MFT – those are generally used in the event of an accident. A regular stop is simply a procedural step that can be initiated by the operator as needed. I think you understand the rest of it pretty well; that’s probably what it means. I’m not very familiar with pneumatic ash conveying systems
4. Emergency shutdown procedure. What’s the difference between this and stopping a process? Stopping a process usually involves doing so in an orderly manner, with coordination with upstream and downstream processes as well as various workshops, all as part of a planned approach. The emergency stop procedure is used in emergency situations when stopping is necessary, regardless of whether it affects the upstream and downstream processes or other workshops.
As mentioned above. Park normally, follow the steps in order, do it systematically and safely, so as not to affect normal driving next time. An emergency stop is implemented solely to ensure the safety of people or equipment in emergency situations; this may result in wastage of materials such as material discharge, and the equipment’s condition after an emergency stop usually requires resetting before it can be operated normally again.
Stopping means normal stopping, that is, after each step of the procedure has been completed, or when the system has not been started. Emergency shutdown refers to an incomplete normal shutdown carried out in an emergency to protect the safety of personnel or equipment in the face of a crisis.
Stopping means normal stopping, that is, after each step of the procedure has been completed, or when the system has not been started. Emergency shutdown refers to an incomplete normal shutdown carried out in an emergency to protect the safety of personnel or equipment in the face of a crisis.
They are all conceptual; specific examples would be better. I’ll give an example myself. For example, after mixing two types of materials, they are first mixed according to the specified ratio, then heated, stirred, left to stand for a while, and finally discharged. After the container is emptied, the process starts over with another mixing of the materials, thus beginning a new cycle. During normal shutdown, whenever the stop button is pressed, it is necessary to wait until one cycle of material discharge is completed before stopping, so as not to start a new cycle. When the emergency stop button is pressed, the material will come to a halt regardless of its current stage; this is essentially a pause. Pressing the reset button again at this point returns things to their initial state. Therefore, a normal stop can exist on its own, whereas the emergency stop function can only be activated in conjunction with the reset button. I’ll give an example of something I don’t understand myself, sigh! Alas! What worries me is that after an emergency stop, the material in the tank might not be rendered unusable!
You’re right. In an emergency stop, to ensure the safety of people and equipment, there’s no time to wait to see if the material has been emptied; therefore, every time there’s an accident involving starting or stopping the machine, it results in significant losses
To use a crude analogy: it’s like going to the bathroom – if you finish normally, there are no consequences. But if you stop suddenly, that is, if you have to interrupt the process halfway because of an urgent matter and just grab your pants and leave, well, that causes a lot of problems
A normal stop allows one to pull up their pants and leave, but an emergency stop (pause) does not permit leaving; it only interrupts the act of defecating, and one must reset it before leaving. If the continue button is pressed at this time, defecation will resume.