Innovation in Natural Gas Monitoring
DETECT LIQUIDS | DETECT HYDRATES | DETECT FOAM
Visual detection of liquids, hydrates or foam combined with image processing provides an alarm that can greatly reduce risk and improve operational performance of gas treatment plants and gas networks.
Introducing the LineVu system for capturing live video footage inside your pipeline.
LineVu reveals contamination in high pressure natural gas systems that until now has been un-detected. Despite commercial and legal contracts requiring that no liquids or solids should enter a gas network, it is common to find that liquid contamination is the cause of damage to power stations and other plant all over the world.
By monitoring the efficiency of gas/liquid separation systems LineVu provides game-changing safety and financial benefits.
Improving Foam Management in Gas Treatment
Liquid carryover in gas treatment causes foaming in amine and glycol contactors. Normal practice is to use de-foamer to recover from a foaming event. This often requires a reduction in gas flow rate until the foam is under control. Current practice is to monitor pressure drop across the contactor. Now, with LineVu reporting a carryover event before foaming starts, de-foamer can be added to prevent foam rather than recover from it, without loss of production.
Improving Condensate Recovery
After gas treatment, it is important to recover as much of the premium condensate from the gas as possible. Processing liquids (usually glycol) can be carried over from gas treatment and freeze in the dew pointing equipment. This causes temperature control problems and can partially block the liquid removal process, and a combination of glycol and condensate are lost down the gas export line. When LineVu reveals liquid carryover from gas treatment, flows can be adjusted to find the optimum flow until the problem is diagnosed and repaired.
Using LineVu at custody transfer points improves accountability for pipeline contamination incidents. Gas is bought and sold at custody transfer points on a dry gas basis. LineVu is revealing glycol and compressor oil carryover that, up to now, passed on-line gas analysers without tripping an alarm. With the extra knowledge that the gas is wet, flow computers can be corrected, operators can make better decisions regarding the acceptability of gas, and pigging operations can be optimized.
The Camera Can in the LineVu system is mounted above a pipeline, normally behind a double block and bleed valve, thereby providing a “stand-off”, meaning that any contamination present in the gas flow does not foul the optics of the instrument.
The data from the Camera Can can be fed to one of three possible user interfaces:
LineVu Local – Monitoring natural gas contamination events as a process control parameter, the Camera Can is cable linked to a safe area controller, where image processing provides a live video stream and local alarm. This system may provide video and data to the site local network.
Up to 48 Camera Cans may be connected to the site controller installed in a safe area.
LineVu Remote – Monitoring either single site or multiple sites, LineVu Remote includes an uplink to a secure server (either Process Vision’s or the Client’s server) allowing both remote and local access to live streamed video. This system encrypts and compresses both video and data, and splits it into three sections for transmission via one or more mobile phone networks. An encrypted user interface is available to password protected users who may be a central technical resource, a control center (for unmanned sites), or the users client (in the case of custody transfer).
LineVu Mobile – LineVu mobile is used for temporary installations for surveys and de-bottlenecking projects. It combines the previous two versions. The Camera Can is cable linked to a Pelicase-mounted controller and uplink system giving the user a choice to store locally or live stream to store video and data on a remote server.
LineVu | A New Way of Thinking Detection of Pipeline Contamination using Image Processing When natural gas is processed, liquids are injected to remove water vapor, carbon dioxide and hydrogen sulfide. It is vital that these liquids are completely removed from the gas stream prior to exporting the gas for[…]