Cyclic hydrogen compressor
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I would like everyone to discuss this: for hydrocracking, during operation, once the recycle hydrogen compressor passes the airtightness test at a high hydrogen pressure of 15.0 MPa, what effects does starting the compressor under such high pressure have on it?
Are you saying it starts when the pressure inside the unit reaches 15 MP?
It shouldn’t be started under pressure, right? According to the steps for starting a compressor, the inlet and outlet of the compressor should be closed; the outlet should be opened to reduce the voltage, then the compressor is started. After that, the outlet is slowly closed again and the voltage is reduced, followed by opening the inlet and applying load. Starting under high pressure can either cause the outlet safety valve to activate or result in excessive loading on the compressor, leading to damage to the machine.
Yes, this source of pressure is the main sealing gas from the dry gas seal; the pressure of this main sealing gas is essentially the system pressure
Of course, the mechanical pressure and system pressure are now almost in balance
The pressure is on the high side; the problem likely lies in the fact that a large current is generated when the press is turned on for the first time, which can lead to overload and damage to the motor. Usually, it starts with low pressure before the pressure is increased
The cyclohydrogen compressor is driven by a turbine; there is no motor!
It depends on the model of your compressor. If it’s a three-phase asynchronous compressor, direct starting is strictly prohibited, as excessive load can cause the motor to burn out. If there is an exciter, then it’s not a big problem and starting is possible. In my opinion, pressure-free starting is the best option
Oh, then I don’t understand; we don’t have a turbine drive
With the key in this way, it’s as if it’s used to urgently start the compressor after a power outage – by simply pressing the start button, rather than following a step-by-step startup process. Is that how I should understand it?
It should be understood that the circulating hydrogen compressor in a hydrogenation unit is the heart of the entire facility; it has its own auxiliary systems, which are usually driven by steam turbines. Once the circulating compressor stops, a series of interlocks are triggered, and the entire process must start over