There are two reverse movements at the compressor outlet, why?
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We have installed two anti-backflow control valves at the outlet of our compressor, leading to the top of the distillation tower – one large and one small. Is there any reasonable explanation for this, or is it unnecessary?
Xiaofei is used to adjust the inlet flow during normal operation, while Dafei is used in case of accidents with the compressor or during its start-up and shutdown. Xiaofei is designed to facilitate adjustment and prevent large fluctuations in the compressor’s outlet flow.
It depends on the process; generally, anti-backlash should not be enabled, as doing so consumes energy； If the inlet flow rate to the compressor consistently fails to meet the requirements and there are large fluctuations in operation, there must be a reason for that
This post was last edited by zhenghemqx on 2009-5-9 at 15:04. In short, the purpose is to facilitate adjustment – use the smaller one for normal use, and the larger one when starting or stopping operations.
This is step-controlled, resulting in more sensitive control. The old air compressors we used to import had just two control valves. Counter-rotation control is not linear; the greater the reduction in inlet flow, the faster and to a greater extent the control valve needs to be opened.
We only have one, and it’s generally used during startup and shutdown before switching back to air cooling
For easy adjustment, Xiaofei is used to regulate the settler pressure during normal production, while Dafei is employed in emergency situations or during startup and shutdown.
This is for easy adjustment. The smaller one is used for fine-tuning during normal production, offering better flexibility and precision.
It is step-controlled: the small valve is opened first to full position, and then the large valve takes effect, thereby improving the accuracy of regulation.
The so-called backflow refers to the situation where the compressed gas returns to the compressor inlet after cooling; when the flow rate of gas entering the compressor decreases and may fall below the critical value, the compressor uses a backflow regulator to automatically adjust the amount of gas that circulates from the compressor outlet back to the inlet. The small counter-rotation is used to adjust the smooth operation of the air compressor on a regular basis, while the large rotation is used to increase the speed of the air compressor at the time of startup.
All compressors use two-stage compression. The anti-rotation systems at the compressor outlet are divided into primary and secondary stages; if surge occurs in the primary stage, the primary anti-rotation system is activated, and if surge occurs in the secondary stage, the secondary anti-rotation system is activated. Our company’s DCC unit features two such anti-rotation systems. If there are only two counter-rotating elements at the secondary outlet, it is to enhance the stable control of the unit’s operation; just as flares come in different sizes as well.