As a supplier of Gas Compression Skids, I often receive inquiries about the shutdown procedure of these crucial pieces of equipment. A proper shutdown is essential not only for the safety of the operators but also for the longevity and optimal performance of the skid. In this blog, I will walk you through the step - by - step shutdown procedure of a Gas Compression Skid.
Pre - Shutdown Checks
Before initiating the shutdown process, a series of pre - shutdown checks should be carried out. First, examine the pressure gauges. Ensure that the suction and discharge pressures are within the normal operating range. Abnormal pressures could indicate a problem within the system, and it's necessary to address these issues before shutting down. For instance, if the discharge pressure is too high, it might be due to a blockage in the downstream pipeline.
Next, inspect the temperature sensors. High temperatures can cause damage to the compressor components, such as the pistons and cylinders. If the temperature is elevated, it's important to determine the root cause, whether it's due to insufficient cooling or excessive friction within the compressor.
Also, check the lubrication system. Make sure that the oil level is adequate and that the oil is flowing properly through the system. Poor lubrication can lead to increased wear and tear on the moving parts, and it's crucial to resolve any lubrication - related issues before shutting down the skid.
Step 1: Isolate the Gas Supply
The first step in the shutdown process is to isolate the gas supply to the compression skid. This is done by closing the inlet valve. Closing the inlet valve prevents any more gas from entering the compressor, which is the first step in safely shutting down the system. When closing the valve, ensure that it is fully closed to avoid any gas leakage.
It's important to note that during this process, the pressure in the compressor may still be high. Therefore, it's necessary to monitor the pressure gauges closely to ensure that the pressure does not exceed the safe limits.
Step 2: Unload the Compressor
Once the gas supply is isolated, the next step is to unload the compressor. This involves reducing the load on the compressor by adjusting the control valves. The unloading process helps to reduce the stress on the compressor components and prepares the system for a smooth shutdown.
There are different methods of unloading a compressor, depending on the type of compressor used in the skid. For example, in a reciprocating compressor, the unloading can be achieved by opening the bypass valve, which allows the compressed gas to flow back to the suction side. In a screw compressor, the unloading is usually done by adjusting the slide valve or the capacity control system.
Step 3: Stop the Compressor Motor
After the compressor is unloaded, the next step is to stop the compressor motor. This is typically done by turning off the motor switch. When stopping the motor, make sure to follow the manufacturer's instructions to avoid any electrical hazards.
It's important to note that the compressor may still be rotating due to inertia even after the motor is stopped. Therefore, it's necessary to wait for the compressor to come to a complete stop before proceeding to the next step.
Step 4: Depressurize the System
Once the compressor has stopped rotating, the next step is to depressurize the system. This is done by opening the vent valve to release the remaining gas in the compressor and the associated piping. When opening the vent valve, ensure that it is done slowly to avoid any sudden pressure drops, which can cause damage to the system.
During the depressurization process, monitor the pressure gauges closely to ensure that the pressure is being reduced to a safe level. Once the pressure has reached a safe level, close the vent valve.
Step 5: Shut Down the Auxiliary Systems
After the system is depressurized, the next step is to shut down the auxiliary systems. This includes the cooling system, the lubrication system, and the control system.
For the cooling system, turn off the cooling water pump or the cooling fan, depending on the type of cooling system used. This helps to conserve energy and prevent any unnecessary wear and tear on the cooling system components.
For the lubrication system, stop the oil pump to prevent the oil from circulating in the system. This helps to avoid any oil contamination and reduces the risk of oil leakage.
Finally, turn off the control system to ensure that all the electrical components are de - energized.
Step 6: Perform Post - Shutdown Checks
After the skid is shut down, it's important to perform a series of post - shutdown checks. These checks help to ensure that the system is in a safe and proper state for maintenance or long - term storage.
Check for any gas or oil leaks. Inspect all the valves, connections, and pipes for any signs of leakage. If any leaks are detected, it's necessary to repair them immediately to prevent any safety hazards.
Inspect the compressor components for any signs of damage or wear. Check the pistons, cylinders, valves, and other moving parts for any visible damage or excessive wear. If any damage is detected, it's necessary to replace the damaged parts before restarting the skid.
Also, check the electrical components for any signs of damage or loose connections. Ensure that all the electrical wires are properly connected and that there are no signs of overheating or short - circuits.
Importance of a Proper Shutdown Procedure
A proper shutdown procedure is crucial for the safety of the operators and the longevity of the Gas Compression Skid. A improper shutdown can lead to various problems, such as equipment damage, gas leakage, and even explosions.
By following the proper shutdown procedure, the risk of these problems can be significantly reduced. It also helps to ensure that the skid is ready for the next startup and that it can operate efficiently and safely.
Conclusion
In conclusion, the shutdown procedure of a Gas Compression Skid involves several important steps, including isolating the gas supply, unloading the compressor, stopping the motor, depressurizing the system, shutting down the auxiliary systems, and performing post - shutdown checks. As a [Gas Compression Skid Supplier], we recommend following these steps carefully to ensure the safe and efficient operation of the skid.
If you are interested in our Skid Mounted Compressor or Hydro Compressor products, or if you have any questions about the shutdown procedure or other aspects of our Gas Compression Skids, we encourage you to contact us for a detailed discussion and potential procurement. Our team of experts is always ready to assist you in finding the best solutions for your gas compression needs.
We also offer Hydraulic Piston Compressor which is known for its high efficiency and reliability. Feel free to reach out to us for more information.
References
- Compressor Handbook, Various Editions
- Manufacturer's Manuals for Gas Compression Skids
- Industry Standards for Compressor Shutdown Procedures
