Installing VOCs treatment equipment is just the first step, what truly tests the level of operation and maintenance is the interpretation of operational data. The control system of the tertiary oil and gas recovery device will record real-time data such as inlet pressure, exhaust concentration, membrane group pressure, temperature, and daily processing capacity. These numbers are not decorations, they can intuitively reflect whether the device is currently in a healthy state. This article breaks down several core indicators to help gas station operation and maintenance personnel establish a set of understandable and practical human-computer interaction habits.
The exhaust concentration is the most indicative data of the effectiveness of governance. The lower the concentration of exhaust gas processed by the device, the more normal the membrane separation and condensation sections are working. During operation and maintenance, the exhaust concentration can be regularly checked. If the concentration continues to rise, it often indicates a decrease in membrane module performance, liquid content in the inlet, or a decrease in condensation heat transfer efficiency. The concentration data should be viewed in conjunction with the operating time: a slow increase in concentration after an increase in the operating hours of the same equipment is a normal aging trend, and the timing of membrane component replacement can be planned.
The pressure before and after the membrane assembly reflects the permeability and scaling of the membrane surface. During normal operation, the pressure of the membrane group should be maintained within a stable range. A slow increase in pressure difference indicates the accumulation of pollutants on the membrane surface or liquid droplets carried by the inlet air. A sudden change in pressure difference may be due to problems with the pipeline or membrane group. If a gas-liquid separator is installed at the front end of the intake, it must be ensured that it works properly, because the entry of liquid oil into the membrane assembly is one of the main factors that shorten the membrane life. Recording membrane group pressure once a day and observing trends online is more valuable than a single reading.
The system temperature indicators include ambient temperature and critical point temperature. The heat transfer efficiency of the condensation section is directly affected by the ambient temperature. It is normal for the condensation capacity to decrease during high temperatures in summer. It can be determined whether the heat transfer needs to be cleaned by observing whether the outlet temperature continues to rise. The processing capacity data reflects the load of the device, and the cumulative processing time, processing capacity, and return oil volume of the day can help determine the seasonal changes in the exhaled gas volume of the oil tank, providing a basis for subsequent expansion or adjustment of start-up parameters. By comparing these sets of data with actual operating conditions, equipment abnormalities can be detected earlier.
Suggest making exhaust concentration, membrane pressure, and processing capacity fixed daily inspection items, recording them and keeping trends. Most devices' touch screens can switch between operating data and alarm history, and provide diagnostic prompts in case of abnormalities. Remember to turn off the main power before maintenance, and live working is strictly prohibited; Any faults that cannot be eliminated on site should be immediately shut down and the equipment supplier's after-sales service should be contacted to confirm the elimination before resuming operation, ensuring the safety of the station.
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