What are the options for dealing with voltage fluctuations and power outages in diesel hydrogenation?
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As the title
What is the handling principle: start the compressor first, then feed the material?
In the event of a power fluctuation, restart the equipment as soon as possible to resume production. If it takes a long time or restarting fails, treat it as a power outage; in such cases, it is essentially handled as an emergency shutdown
Transient power fluctuations usually don’t cause any problems; modern equipment is equipped with auto-start functions, so it will start up automatically after such fluctuations and production will not be affected. Equipment without this auto-start feature should be repaired as soon as possible. If there is a power outage, operations must be stopped urgently.
It depends on whether it’s a minor power fluctuation or a severe one (one that exceeds the device’s auto-start time), as well as whether it’s low-voltage or high-voltage electricity. There are corresponding emergency plans for each scenario. After taking action, it’s necessary to verify the situation; some devices don’t start automatically and require manual activation. Generally, there is a status table for the devices, which can be used to check their operating status and then go out to inspect them. Attention should also be paid to air-cooled systems, as they need to be restored first due to their location. It’s important to conduct drills in advance and allocate personnel appropriately; otherwise, things will get chaotic·~~~
The last edit to this post was made by zhangchao2012 on 2016-12-27 at 14:12. Whether the shutdown is caused by a prolonged interruption in power supply or a sudden one depends on whether the equipment that stops operating is a large-scale unit or a small centrifugal pump. Large-scale units are equipped with interlocks; for example, if the feed pump stops operating, the reaction heating furnace will also shut down as a result. In such cases, it’s sufficient for the system to return to a stable state. If it’s a small pump that stops operating, it will at most cause a temporary fluctuation in the liquid level of the tower, which can be corrected by restarting the pump quickly. If it’s an air cooler that stops operating, it should be restarted immediately to prevent the safety valve from activating due to overpressure
During a power outage, operations come to a halt instantly, followed by a power restoration. Some equipment may not need to stop operating and can resume functioning quickly, while in other cases it’s uncertain when power will be restored. It is necessary to be prepared to shut down operations urgently; however, care must be taken to prevent overheating, overpressure, dry burning, and voltage spikes
First, check the reactor temperature; if it is too low, it needs to be raised
The principle is to avoid overheating, overpressure, pressure interference, and dry burning
Can the feed pump be started again right away after it stops intermittently, without closing the outlet valve?……
Generally, the standby pump is started; if it is necessary to start the pump that is currently stopped, the outlet valve should be closed first before starting it.
Oh, our diesel feed pump tripped and started up again right away……
Are you referring to the feed pump? The material pump here does not have automatic start functionality
I’m talking about the feed pump for the diesel reaction system, with a pressure of 90 kilograms. What I mean is to manually start it right after detecting the shaking stop, without closing the outlet valve. Later on, I realized that if the pump’s check valve doesn’t function and the back pressure on the pump is high, either the pump won’t start or it will shut down due to excessive current. It’s easier just to use a diagram……
Correct, the starting current of the high-pressure pump does indeed need to be taken into account; I think it’s safer to follow the steps
After the hydrogenation unit stops operating, the circulating hydrogen compressor must be started as soon as possible to prevent excessive temperature rise. In the event of a prolonged power outage, it is necessary to relieve pressure from the hydrogenation reactor; as for the distillation section, the pumps should be started starting with those at the top of the tower before those at the bottom!!!