GETTING PROPANE-BUTANAN AT DISCHARGE OF NATURAL GAS FROM THE PART OF THE MAIN GAS PIPELINE
Today, 80% of the gas pipelines of the Unified Gas Supply System are operated in a condition requiring immediate repair of defective sections due to wear and tear. Before carrying out repairs by the method of replacing defective pipes, it is necessary to free a natural gas section of the gas pipeline with a length of 30 km (the maximum permissible distance between the linear valves of the gas pipeline in accordance with regulatory requirements). As an energy-saving measure, before repair, if possible, gas is fired at a given section of the gas distribution station fed from this section of the gas pipeline. The operation occurs by lowering the pressure in the area to the desired value. In the absence of the possibility of gas being triggered by the consumer, it is necessary to vent the full volume of gas into the atmosphere, which entails high costs for the enterprise both due to the loss of the etched volumes of the pumped product, and due to compensation for environmental damage. To consider the possibility of reducing the enterprise’s costs for pre-gas bleeding, an analysis was made of the efficiency of the propane-butane fraction production scheme proposed in [1].