New method of odorant injecting at gas pressure reducing station based on bypass method using ejector

Document Type : Research Article


Associate professor of mechanical engineering, Yasouj University


With the existence of several natural gas perfuming systems, such as the bypass system and the injection system, for some reasons including the problems and limitations of the existing systems, it seems necessary to introduce a new perfuming system with less limitations. Currently, in the gas distribution system in the country, only the above two systems are used for gas aromatization. Since the injection system has a high maintenance cost and also the bypass system is limited to low capacities, it is very necessary to introduce a new system to aromatize the consumed natural gas. In this article, a new gas perfumer system has been introduced. The desired system is created by combining an ejector with a bypass system. In this article, the modeling of the combined system under study has been done and the effect of important parameters such as gas pressure (gas pressure in the upstream), mass flow rate of the odorant, gas temperature (temperature in the upstream), nozzle diameter and number of nozzles are also on the amount The compressed gas has been carried out to enter the mercaptan tank and absorb the required amount of fragrance according to the conditions. The results show that the diameter of the nozzle and the number of nozzles have no effect on the mass rate of gas flow required for the fragrance system. But the gas mass flow rate required for the aromatizer system is affected by the gas pressure and gas temperature upstream of the aromatizer system.


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