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НаименованиеAutomating bases for the storage of gas-filling stations

 

A Gas-Filling Station (GFS) is the core element of the liquefied gases’ (propane, butane and propane-butane mixtures) distribution chain for consumers. There the gas is received, discharged into the tanks, stored and transferred to cylinders, tank trucks and movable vessels.

The main facilities of the GFS are:

  • Railway Tank Car Loading Rack;
  • Storage Section;
  • Pumping and Compressor Section;
  • Cylinder Filling Section;
  • Tank Truck Loading Section.

Generally, the GFS automation involves the monitoring of gas reception and loading. For this purpose, mass flow meters or platform weighbridges and dedicated software are used. However, recent regulations require that GFS’s should be also equipped with automatic tank level measuring devices. To meet this requirement, the “Contact-1” enterprise (Ryazan) offers a wide range of the devices and provides automated monitoring and control systems for GFS’s.

One of the users of such systems is the Belgorodskaya GFS. The automated gas fiscal metering systems were already put into operation at this GFS. They were designed to meter the gas supplied from the railway tank car unloading rack and the gas filled into the tank trucks and cylinders. To complete the gas metering chain at the GFS, an automated system for monitoring the quantity parameters of the liquefied gases in the Storage Section was developed. The system employs the ISU152I single-channel explosion-proof (Ex ib IIB X) measuring and alarming level devices as well as the Fastwel analog input and interface modules. The software calculates the volume of the products in the tanks, multiplies the volumes by the densities to obtain the mass of liquefied gases, warns the operator of any emergencies, keeps an account of the gas received and generates the required data archives. The program allows the user to set the prefault condition limiting values of the parameters. When a parameter reaches the limit, the software sets on the sound alarming.  The conditions are recorded in the event log. All historical tank data are backed up. The system measures the volume of gas in the tankage of the Storage Section with an accuracy of about ±0.5%. The installation and commissioning of this system were accomplished within a few days.

A number of the similar systems have been implemented in Russia and the CIS. The benefits of implementation are a reduction in accident probability, improvement of gas metering accuracy, assurance of monitored data reliability with no impact of human factors.

  

The tankage of the Storage Section at the GFS


By Victor Gusev, Boris Gorbatenko and Aleksandr Kuleshov

Victor Gusev,  Boris Gorbatenko ,  Aleksandr Kuleshov