How to connect the online monitoring system for three-time oil and gas recovery at gas stations? Data networking and daily maintenance

The supervision of three-time oil and gas recovery at gas stations is transitioning from "inspection reports" to "online monitoring": indicators such as emission concentration, gas-to-liquid ratio, and liquid resistance are continuously collected by online devices and uploaded via the internet, allowing regulatory authorities to monitor the operational status of each station from the backend. Online monitoring compels devices to operate continuously in compliance with standards, and also reduces the room for data falsification. For owners, how to connect monitoring equipment, how to connect data to the internet, and how to maintain it on a daily basis are essential lessons. This article clarifies these three aspects: access, networking, and maintenance, providing guidance for both newly built and renovated stations.

How to connect the monitoring equipment

The core equipment for online monitoring consists of three components: an emission port concentration analyzer, a gas-liquid ratio monitoring unit, and a pressure liquid resistance monitor, which are integrated with a data collector. The installation locations are carefully chosen: the sampling point of the analyzer is set at a representative section of the emission pipeline according to specifications, avoiding elbows and dead zones; for gas-liquid ratio monitoring, a flowmeter is installed in the return pipeline of the fuel dispenser, allowing automatic comparison of data with fuel dispensing volume. The operating parameters on the device side - membrane pressure difference, vacuum degree, and condensation temperature - are synchronously connected to the collector, ensuring that monitoring data and operation and maintenance data are integrated into a single network, and that the emission data can be viewed through a single set of tables.

How to connect data to the internet

Networking should be implemented according to the data interface specifications of the local regulatory platform: the protocol, fields, frequency, and encryption method should be subject to the platform documentation. Before accessing, obtain the specifications first, rather than guessing based on experience. Data uploading must pass through the verification stage - the rules for eliminating abnormal values, retransmitting missing data, and marking offline devices should be clearly configured in the collector. During the networking debugging period, conduct joint testing with the regulatory backend, comparing the platform display values with the readings of on-site instruments. If the deviation exceeds the limit, check the collection link. The data retention period should be set according to regulatory requirements, with both local archiving and cloud uploading in place, so that both can be presented during inspections.

How to maintain it in daily life

The maintenance of monitoring equipment is more meticulous than that of recovery devices: the sampling pipeline of the analyzer is regularly purged to prevent blockage, and the filter is replaced on schedule; the flowmeter is calibrated periodically, and replaced if the drift exceeds the standard; the health status of the collector and communication link is included in daily inspections, and immediate action is taken if offline timeout occurs - the offline duration itself is a regulatory assessment item. Calibration with standard gas is performed periodically, and calibration records are archived along with the data. The maintenance plan is scheduled together with the maintenance of recovery devices, so that both tasks can be handled during one visit, reducing disruption to business operations.

A reminder to owners: After the online monitoring system goes live, the operating habits of the device need to be adjusted accordingly. The previous practice of rushing to adjust before inspection is no longer feasible. In the face of continuous data, stable operation is the long-term answer. Making use of the monitoring data provides an additional free tool for process diagnosis.

Online monitoring configuration reference

Maintenance checklist

1. The purging of sampling pipelines and replacement of filters are carried out on a monthly basis;
2. Flowmeters and analyzers are calibrated periodically, and any drift is replaced;
3. The status of collectors and communication links is included in daily inspections;
4. Offline and incomplete data should be marked according to regulatory standards and supplemented;
5. The standard gas calibration records are archived together with the data;
6. The scheduling of monitoring maintenance and device maintenance will be combined and carried out simultaneously.

Frequently Asked Questions

Can online monitoring be installed in the old station?

Yes, the installation can be carried out in three steps: pipeline drilling, equipment positioning, and data collection and networking. The construction can be arranged during the low sales period. For old devices with insufficient instrument accuracy, key points should be supplemented first, and then monitoring can be connected.

What should I do if the upload is interrupted?

First, check the local links - collector power supply, communication module, and platform interface. If everything is normal locally, contact the platform side. Mark the interruption period according to regulatory guidelines, and upload the missing data after recovery to avoid data gaps.

If the monitoring data is inconsistent with the inspection data, whose data should we follow?

Conduct a review based on the standards used by the testing agency during on-site inspections: verify the calibration status and sampling conditions of the monitoring equipment, and arrange for calibration if discrepancies exceed limits; if there is a significant long-term deviation between the two, it indicates that the monitoring chain requires a specialized inspection.

This article is compiled by Luoyang Wohong Petrochemical Equipment Co., Ltd., which provides design, manufacturing, and operation and maintenance services for condensation recovery, membrane separation recovery, and complete solvent recovery equipment to chemical and pharmaceutical enterprises. If you need process evaluation or scheme configuration, please feel free to contact us for discussion.