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1 Under what circumstances should an emergency stop be initiated? In cases such as a complete outage of water and electricity throughout the plant, serious failures in this machine, severe impacts on the cylinders or crankcase, large amounts of water or liquid present, or fires and explosions in adjacent areas. What factors are related to the poor air delivery capacity of a 2-compressor system? Import pressure and temperature, the effective gas content in the intake air, leakage from the inlet and outlet valves, system resistance, leakage from the piston rings, cooling efficiency, clearance in the cylinder, and various leaks and losses. 3 How to deal with a compressor with liquid inside? In the case of slight liquid carryover, activate the oil drainage and venting systems to remove it, and contact the relevant personnel; in cases of severe liquid carryover, an emergency shutdown is required, with valves and cylinders as well as pipelines being opened to drain the liquid. 4 What are the key points for operating a compressor? Ensure the main unit and auxiliary units are operating properly, maintain proper pressure and temperature at each stage, start and stop the equipment in accordance with the procedures, adjust the gas flow rate promptly, and prevent negative pressure or the presence of water or liquids. 5 What issues should be considered during normal startup and shutdown? Adjust the relevant control valves, start up the auxiliary machines, open the cooling water valve to drain oil and water, and follow the operating procedures. Once the compressor is running properly, gradually increase the inlet pressure over time. 6 What are the hazards of gases carrying liquid? In cases of gas carrying liquid, reduce the gas flow rate in mild situations; in severe cases, it can cause the piston rod, connecting rods, crankshaft, etc. to break, or damage the cylinder head and piston. 7 How can the compressor operator reduce consumption? Maintain stable operating conditions, strictly control process parameters, take good care of the compressors, increase their operational efficiency, reduce leaks and losses, and replace valves in a timely manner. Why can’t the 8-turning handle be activated in the turning position? If the crank handle is in the cranking position, it means that the gears of the cranking device and those of the main engine are not separated; starting the main engine will damage the gears. Remember, the main engine must not be started if they are not separated. 9 What are the hazards of coal tar to the first stage of the compressor? Coal tar in semi-water gas can easily cause blockages in the stage valves, jam the valve discs, and lead to wear of the piston rings, all of which affect the pumping capacity; moreover, a blockage in one of the water coolers will impact the cooling efficiency. What are the different types of 10 oil-water separators? There are two types: high-pressure and medium-pressure sections operate on the principle of inertia, while the low-pressure section operates on the principle of centrifugal force. What is the function of the circuit 11 valve? Its function is to recover gas, returning the gas from each section through a main return pipe to the inlet buffer of the first section for reuse. During normal operation, it regulates the gas flow rate, while during shutdown it serves to relieve pressure. What is the function of a 12-way three-port leak-proof valve? To prevent internal leakage in the three-way valve during normal driving and avoid unqualified gases from entering the three-inlet system. What are the reasons for no pressure before the three-inlet of a 13-monolcohol compressor, and how to address it? Reason: The decarburization electron valve lost control, preventing the gas from being delivered. Treatment: Quickly activate the one-in-one-reduction mechanism, close the three-in valves and the four-out valves, and open the four-discharge valve to vent the gas from the fourth stage. 14 Why can lubricating oil serve as a seal? Lubricant has a certain viscosity and adhesive strength; during normal operation, it forms an oil film between moving and stationary components, thereby providing a sealing effect. 15 What is the working principle of an electrostatic defouler? A high-voltage electrostatic generator converts 2-frequency alternating current into high-voltage direct current, which is then sent into the tower via a step-up transformer controller and a constant current control cabinet. A high-voltage electrostatic field is established between the deposition plate and the electrode wire; when the intensity of this electric field reaches a certain level, the tar and tiny particles present in the gas are ionized. Under the influence of the electric field force, these charged particles are directed toward the electrode wire and the deposition plate, and then, due to gravity, they are discharged through the bottom discharge outlet. 16 What issues should be considered when using an electrostatic defouler? Check that all electrical equipment is functioning properly. The jacket temperature should be maintained between 60°C and 80°C to ensure that the oxygen content remains below 0.5%. To ensure effective dust removal, the rectifying voltage should be controlled at 50–60 KV. Waste fluid must be removed promptly, and it is strictly prohibited to introduce water into the system. When the rectifying voltage or discharge frequency is high, the system should be stopped to clean the electrode wires. What is the process flow for the precision desulfurization unit? The gas coming out of the compression unit enters an oil-water separator, then proceeds to a cooling unit. After passing through the oil-water separator, it goes to a heating exchanger before entering the hydrodesulfurization tank, where organic sulfides are converted into inorganic sulfur. The resulting gas then goes to a cooling unit, followed by a gas-water separator, and finally to an activated carbon tank, where sulfur is removed to levels below 0.1 ppm before returning to the compression unit. What are the key operating points for the precision desulfurization unit? The oxygen content in the raw gas entering the system must be kept below 0.5%. The temperature of the hydrodesulfurization tank must be strictly controlled, and operations should be carried out at as low a hydrogen sulfide level as possible. Overheating is strictly prohibited, as is the introduction of water into the system. What is the function of the hydrodesulfurization agent? Its role is to convert organic sulfur in the gas into inorganic sulfur under the action of the hydrodesulfurization agent. What is the function of activated carbon? It adsorbs inorganic sulfur from the gas, thereby purifying the gas. What are the reasons for high current consumption in the circulation pump? Imbalanced synthetic hydrogen-to-nitrogen ratio, low voltage, motor failure, high load, etc. What are the key points for reversing a 22-cycle machine? Start the standby unit following the normal startup procedures, open the inlet valve, gradually close the circuit valve of the standby unit, open the outlet valve once the pressure reaches the desired level, and at the same time gradually open the circuit valve of the unit in use while closing the outlet valve. Once the standby unit is operating properly, shut down the unit in use following the normal shutdown procedures. What are the key points for the proper shutdown of a 23-cycle machine? Open the circuit valve, close the inlet and outlet valves, and open the vent valve to relieve pressure. Once the pressure has been released, stop the circulation pump and close the vent valve as well as the cooling water valve.