Sea friends, who has any information on starting, stopping, and switching off reciprocating compressors? Please share it, thanks.

Search in Haichuan; there are plenty

Reciprocating compressors use various power supply systems. Regarding the compressors themselves, first of all, they should start with minimal load; the bypass or return valves should be fully open, while the oil supply system requires separate consideration. The instrumentation and protection system is another matter, as I don’t know what kind of system configuration is used for your reciprocating machine. Second, it can be started once the corresponding conditions are met; the startup requirements are specified in the device manual. The requirement for the cutting machine is simply the adjustment of the valves; both outlet valves must be fully open. Since the unit in use is operating under normal process conditions, the unit to be connected must have its discharge valve fully open, with the pressure maintained at the same level using an exhaust valve or a return valve. Thanks to the function of the check valve, it is possible to open wider the discharge valve connected to the unit while maintaining constant flow rate and pressure, and gradually increase the opening degree of the vent valve and circulation valve of the unit that is about to be shut down. Alas,,, in order to save money, companies resort to using technologies found online; it’s no wonder accidents happen. These are for reference only, lol

First and foremost, checks before starting up are of utmost importance. In particular, the lubricating oil of the compressor, as well as its pressure and temperature, the pressure difference; the operation and temperature of the soft water used in the compressor system; whether there are any leaks in the packing; and the air valves and unloaders—all of these need to be thoroughly inspected to avoid problematic situations after the machine is started up； Secondly, it is necessary to prevent pressure buildup in the compressor body during the start-up and shutdown process. Generally, the outlet valve is opened first to vent, and then the inlet valve is opened. Finally, once the compressor is running, it is important to maintain stable system flow, especially during switching, to prevent large fluctuations. “Sea Cruise” means that after the compressor is started, on-site personnel remain for an additional half hour to confirm that parameters such as temperature and pressure no longer change before leaving the site. Over time, as you use a compressor, you come to understand it better – which ones work well and which ones don’t. It’s important to be good at drawing conclusions while using it. You should also check the check valve at the compressor’s outlet regularly to ensure that there is no backflow of high-pressure gas, as this is a key factor that can lead to the damage of the valve.

What these people are saying right now is all wrong. Routine inspections, oil testing interlocks, the activation of circulating water, and nitrogen purging of the packing are not needed to be mentioned here. Before starting the machine, first test whether the unloader functions properly and ensure that it is in a 0-load state, i.e., unloaded. Slowly open the inlet valve to allow air in; once the pressure is nearly balanced, the pipelines will vibrate and make noises. Fully open the inlet valve, then slowly open the outlet valve. When the pressure is nearly balanced again, fully open the outlet valve. The central DCS sends a start signal for the compressor to the electrical system, and the machine is started by pressing the start button on site. After the compressor starts up, check that all parameters are normal. Then increase the load on the unloader from 0% to 50% to 100%. After each increase in load, verify that all parameters of the compressor remain normal before applying more load. Once the compressor is operating at 100% full load and all parameters are confirmed to be normal, it is possible to leave

I don’t think this can be applied universally! First, you need to see what kind of process medium it is What impact does it have on the system during the switchover? The manufacturer will provide a reasonable and appropriate operation plan for starting up and shutting down the equipment! Different devices have different operating procedures! Personal profile!