Load reduction operation of ammonia synthesis compressors
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I know it varies depending on an individual’s way of operating! ! Let’s discuss how the load reduction of ammonia synthesis compressors is carried out! ! Thank you~! !
It seems the question is too simple! ! There’s no support from seniors at all! ! :L
We use a DCS system to open the vent valve
Reciprocating compressors mainly adjust the load by controlling the opening degree of the inlet and outlet valves of the compressor.
Our compressor is also a reciprocating type, but it uses a 2-stage 1-reduction design; when a large amount of reduction is required, 3-stage 3-reduction, 5-stage 4-reduction, and similar configurations are used to balance the pressure
By how much should the load be reduced? Adjusting the loop is not as good as reducing operation time.
Reciprocating compressors mainly adjust the load by controlling the opening degree of the inlet and exhaust valves of the compressor. The load is determined by the level of outlet pressure.
We are also carrying out a reduction operation on a one-time basis! Also pay attention to temperature and inlet pressure
Centrifugal types use two methods of adjustment: opening the anti-surge valve and reducing the compressor speed. A small load reduction involves slightly opening the anti-surge valve, while a large load reduction employs both methods simultaneously.
We are reciprocating compressors; the volume control is also achieved by opening and closing a valve one at a time, with the volume being determined based on the outlet pressure control.
For reciprocating compressors, it is generally advisable to operate them with one cycle per reduction; from the perspective of energy conversion, this approach is more energy-efficient than operating them with two or three cycles per reduction； Steam turbines can reduce output in an open-loop manner, or by lowering their speed; electric turbines can achieve this by reducing the current.