System Overview

The working area of the gate station, the pressure regulating station, the storage area, and the LNG station are all open-air areas, covering a large area, and there are a lot of valves and flanges. Traditional monitoring and monitoring equipment cannot achieve the purpose of monitoring and monitoring in the open environment due to technical reasons. It is difficult to form effective monitoring if there are equipment in these occasions. Manual inspection is still needed, and the safety management efficiency is low and the effect is poor. So at this time we need to install laser monitoring instruments in these places to pay attention to gas leakage for us anytime and anywhere. This allows us to accurately grasp accurate data and ensure safety.

(1) Install a fixed scanning laser methane detector for monitoring

In these work scenes, fixed scanning laser methane detectors are installed in sub-regions, and through radar-like rotating scanning, a 360° omni-directional monitoring is formed to monitor the various process areas of the entire station. Frequent manual inspections are no longer required. The fixed scanning laser methane detector is like a tireless inspector who always provides 24-hour uninterrupted leakage monitoring for these areas.

The monitoring situation is displayed in visual form in combination with video, and managers can "see" the leakage situation the first time. In the monitoring screen, the target is used to display the location currently being detected, and the gas concentration information at the current detection location is displayed.

The equipment can be installed outside the process area or at a certain high point. Once it is applied, it can replace manual inspections in the station. Using multiple scanning modes, it can cover the scanning detection within the set range, or detect the risk points point by point. Realize intelligent scanning for leak finding, which can accurately locate the leak, win repair time, make repairs more timely, and avoid accidents caused by increased leakage.

(2) Install a fixed reflection laser telemeter for monitoring

For single pipelines, LNG vaporizers, storage tanks and other facilities, fixed reflective laser telemeters can also be used for overall monitoring.

The reflective laser telemeter is mainly aimed at the overall leakage monitoring and leakage cross-border monitoring in the long-distance space. In the long-distance space, only two devices need to be installed at both ends to realize the long-distance monitoring.

We installed 11 fixed reflective laser telemeters at the CNOOC Hengqin Natural Gas Terminal to monitor the pipeline as a whole. The longest pipeline distance reaches 250 meters.

According to national regulations, fixed-point combustible gas detectors must be installed in gas stations. The passive optical fiber laser leakage monitoring system can be used to replace the existing traditional combustible gas detectors. Just install the passive light sensing terminal directly where the traditional combustible gas detector was originally installed.

The passive optical fiber laser leakage monitoring system is a passive online monitoring system, mainly for 24 hours remote online monitoring for places without electricity, high humidity, and unmaintainable. The system is composed of a system host and a passive light sensing terminal. The system host and the light sensing terminal are connected by optical fiber, and the optical fiber transmission distance can reach 20KM.

The monitoring site only needs to place a passive light sensing terminal, and the monitoring site can realize 24-hour online monitoring without any power. First, it solves the problem that many important safety nodes and confined spaces cannot be monitored due to lack of electricity. Secondly, it prevents the traditional monitoring equipment itself from being charged and may become an inducement risk for explosion accidents.