INFLUENCE OF TEMPERATURE AND PRESSURE CONDITIONS ON THE EFFICIENCY OF NATURAL GAS PREPARATION

Abstract

The relevance. In recent years, in addition to the direct extraction of natural or associated petroleum gases from the subsoil, it is necessary to prepare them, ensure commercial quality, in particular, remove moisture, higher C2+ hydrocarbons and other by-product gases that adversely affect the technical and economic performance of plants and contribute to the formation of crystalline hydrates. Due to the high quality requirements for treated natural gas and moisture content growth to increase the profitability of production, gas treatment technologies are constantly being improved and updated, including the absorption method of natural gas drying. Purpose: to substantiate the effectiveness of the use of triethylene glycol as an absorbent in preparation of natural gas by the absorption method at the existing integrated natural gas treatment plant. Object: complex natural gas treatment unit. Method: simulation of moisture absorption from natural gas in the UniSim Design software package. Results. The influence of pressure and temperature, two absorbents: diethylene glycol and triethylene glycol, on the efficiency of gas treatment on the model of a natural gas treatment plant, an operating gas field, has been studied. The optimal temperature and pressure are selected, at which moisture absorption from gas will most effectively take place at decreasing pressure of the input raw material. It is shown that when triethylene glycol is used as an absorbent, the energy consumption for gas compression, its cooling before the absorber, and the consumption of the desiccant are significantly reduced compared to diethylene glycol.

Keywords

• absorption gas dehydration
• dew point temperature
• complex gas treatment plant
• natural gas
• triethylene glycol
• diethylene glycol