【Q&A】Catalytic Coking Reformate Blending Edition 20170919

Answer: In production, it is responsible for maintaining the pressure in the control system, supplying compressed rich gas for absorption and stabilization, and creating the prerequisites for the ultimate recovery of gasoline, as well as for the production of liquefied gas and dry gas.

The function of the compressor is to raise the pressure of the rich gas from the fractionation section to the pressure required for the operation of the absorption and stabilization section. In most refineries, the pressure generation units consist of a combination of a centrifugal compressor and a turbine; of course, some smaller refineries use electric motors driven by gearboxes to operate the centrifugal compressors. Each refinery makes its choice based on its own steam balance requirements and grid conditions. The principle of a centrifugal compressor is that a rapidly rotating impeller drives the gas to rotate at high speed; during this rotation, the kinetic energy of the impeller is transferred to the gas. The gas gains energy and is flung out of the impeller at high speed due to centrifugal force, thereby acquiring high kinetic energy. As the gas moves through the flow channels into the diffuser chamber, its velocity decreases, and its kinetic energy is converted into static pressure, resulting in an increase in pressure. As the gas is flung outward at high speed due to centrifugal force, a low pressure is created at the center of the impeller; the gas is then automatically drawn into the impeller through the inlet located at its center. In this way, gas is continuously drawn in and discharged, thereby achieving the purpose of pressure increase and transportation.

Answer: Based on the pressure in the settler at the reaction unit, the inlet pressure of the compressor is adjusted in a timely manner to maintain stable outlet pressure and ensure that it meets the pressure requirements for stable absorption control.

The rich gas from the top of the compression fractionator is sent for absorption and stabilization； Control the reaction pressure to provide a stable absorption pressure.

In production, it is responsible for maintaining the pressure in the control system, supplying compressed rich gas for stable absorption, and creating the prerequisites for the ultimate recovery of gasoline as well as the production of liquefied gas and dry gas

In production, it is responsible for controlling system pressure, supplying compressed rich gas in a stable manner for absorption, and creating the prerequisites for the ultimate recovery of gasoline as well as the production of liquefied gas and dry gas.

In production, it is responsible for controlling system pressure, supplying compressed rich gas in a stable manner for absorption, and creating the prerequisites for the ultimate recovery of gasoline as well as the production of liquefied gas and dry gas.

In production, it is responsible for controlling system pressure, supplying compressed rich gas in a stable manner for absorption, and creating the prerequisites for the ultimate recovery of gasoline as well as the production of liquefied gas and dry gas.

In production, it is responsible for maintaining the pressure in the control system, supplying compressed rich gas for stable absorption, and creating the prerequisites for the ultimate recovery of gasoline as well as the production of liquefied gas and dry gas

1. Based on the pressure in the settler at the reaction unit and the load of rich gas, adjust the inlet pressure of the compressor in a timely manner to ensure stable outlet pressure as well as meet the pressure requirements for stable absorption control. 2. Strictly control the temperature and pressure of the pneumatic compressor; over-temperature and over-pressure are strictly prohibited. The lubricating oil pressure should be maintained between 0.13–0.45 MPa. When this pressure reaches 0.12 MPa, it is necessary to inform the shift supervisor promptly so that the air compressor can be switched over and the lubricating oil replaced; 100# oil should be used in autumn and summer, while 68# oil should be used in spring and winter. The exhaust pressure should be controlled at 0.30–0.40 MPa for the first stage, and at 1.3 MPa for the second stage. The exhaust temperature should remain at or below 110°C in both stages. 3. It is important to maintain an appropriate liquid level in the condensate oil tank, around 60%, in order to ensure timely dehydration and oil compression. 4. Within 1 hour after taking over, rotate the spare drive to ensure smooth rotation without any obstruction, and fill out the rotation record. 5. Ensure proper performance of all tasks in the areas of catalytic reactions, distillation, and absorption stabilization. 6. Strictly control the level of lubricating oil in the machine to prevent oil loss. 7. Adhere strictly to the schedule; conduct inspections carefully and thoroughly in accordance with the designated routes and procedures. Ensure that there is no oil in the engine’s exhaust system; report any issues found promptly for resolution. 8. Be responsible for maintaining the cleanliness of the area assigned to the position; take measures to prevent freezing and condensation in winter. 9. Fill in the operation records and shift handover records on time, carefully, accurately, and clearly. 10. Actively participate in business training and fire drill activities to continuously improve professional competence. 11. Be responsible for the storage and handover of fire-fighting equipment and tools assigned to this position. 12. Condensate must not be discharged on-site; it should be collected in oil waste containers and recovered at the crude oil unloading station.