Upgrade path of oil and gas recovery system: complete renovation plan from primary and secondary to tertiary oil and gas recovery devices

The oil and gas recovery renovation of many gas stations is carried out step by step: first, the first and second recovery processes of unloading and refueling are carried out, and then the treatment of tank breathing emissions is gradually supplemented. With stricter emission requirements, tertiary oil and gas recovery units have become increasingly popular as retrofit endpoints. This article outlines a clear upgrade path: how to scientifically plan and implement three oil and gas recovery transformations based on primary and secondary recycling, in order to achieve overall emission standards.

First, take inventory of the current situation: whether the first and second recycling is in place

Conduct a current inventory before upgrading and renovating. Check whether the primary recycling pipeline is sealed, whether the secondary recycling vacuum pump and pipeline are normal, and whether the tank breathing valve and pipeline meet the connection conditions. The tertiary oil and gas recovery device needs to be installed at the gas station that has completed the secondary recovery renovation, and its inlet should be able to connect to the tank breathing valve pipeline. If there are problems with poor sealing and low recycling efficiency in the first and second recycling processes, they should be repaired first and then recycled three times. Otherwise, the backend processing pressure will be too high, affecting the overall effect.

Evaluate upgrade requirements: whether they are needed and what size to choose

Not all sites are in a hurry to recycle three times. The basis for judgment is whether tank breathing emissions have become the main source of emissions and whether local environmental inspections require the treatment of tank breathing oil and gas. After confirming the need, evaluate the specifications: estimate the processing capacity based on the total volume of the storage tank, the amount of oil unloaded per vehicle, and the frequency of oil unloading. The WHSH series tertiary oil and gas recovery unit provides specifications ranging from 4 to 20 cubic meters per hour. For small and medium-sized stations, choose small specifications, while for large stations or stations with obvious peak loads, choose large specifications to avoid waste or insufficiency caused by mismatched specifications.

Site and pipeline condition verification

The tertiary oil and gas recovery device is of the pry type and requires a flat, ventilated, and away from pedestrian flow installation site. Confirm the site dimensions, transportation channels, and lifting conditions before the renovation to ensure the smooth entry of the finished pry frame. Simultaneously verify the connection conditions of the intake, return oil, and exhaust pipelines: the intake is connected to the tank breathing pipeline, the return oil is kept downhill towards the tank, and the exhaust outlet is located reasonably. Only when the on-site conditions are met can the renovation proceed smoothly and avoid the embarrassment of equipment arriving but unable to be installed.

Step by step implementation and unified debugging and acceptance

The implementation of the renovation should be carried out step by step: first, the civil foundation and pipeline prefabrication should be completed, then lifted into place, fixed and grounded, then connected to the gas-liquid pipeline and electrical system, and finally debugged uniformly. The focus of debugging is to verify the collaboration of the three systems: the parallel operation of one recovery and three recovery during oil unloading does not conflict, the second recovery is normal during refueling, and the three recovery automatically starts processing when the storage tank breathes. After passing the debugging and acceptance, train the on-site operators to clarify the key points of daily inspection, winter antifreeze, and membrane component maintenance, so that the equipment can operate stably for a long time.

The upgrade of oil and gas recovery devices from primary, secondary to tertiary is not just a simple stacking of equipment, but a systematic transformation path. With a thorough inventory of the current situation, accurate selection of specifications, thorough verification of site pipelines, and step-by-step implementation, the gas station oil and gas recovery system can achieve low emission standard operation covering the entire process after upgrading.