Among mentioned keywordsaspen hysys, process simulation, gas dehydration, methods. Hello everyone, i am currently working on a natural gas treating project for an upstream facility. Etablering av simuleringsmodell for det nye konseptet i hysys. Etablering av simuleringsmodell for det nye konseptet i hysys sammen med. Teg glycol dehydration hysys simulation, help chemical. Introduction the use of glycol to dehydrate gas streams is an established method that has proven its functionality and versatility over many years. Dry teg contacts the moist natural gas and absorbs the water from it in a contactor tower. Conceptual process design and simulation of membrane.
Teg glycol dehydration hysys simulation, help posted in chemical process simulation. Teg models and the impact of stripping gas the upstream oil and gas industry uses glycol dehydrators to remove water from natural gas. This study therefore seeks to proffer solutions for the optimization of the niger delta gas plant dehydration process using the hysys simulator. The teg makeup stream 14 is required to compensate the losses due to gas entrainment or degradation. Dehydration units are often overdesigned, resulting in high capital or operating costs. Subsea natural gas processing attracts increased interest due to the smaller environmental footprint. Teg dehydration the scope of work includes performing the steady state simulation for teg dehydration system for the inlet gas flow of 67.
Modelling of natural gas sweetening and dehydration processes. Dehydration and acid gas column improvement with aspen hysys. Natural gas dehydration process simulation and optimization. The interesting points of this example lie in the use of the absorption module for the contactor model and in the representation of two columns connected in series the teg regenerator and the teg stripper by a single prosimplus stripper module. The tower contains a structured packing bed to maximize the mixing between the gas and teg and to increase the contact time between the two substances. Glycol dehydration systems are not only efficient at removing water from a natural gas stream, they also remove benzene, toluene, ethylbenzene, and xylene btex as well as other volatile organic compounds vocs. Typical 6 m long double pipe and hairpin glycolglycol exchanger 53 list of figure figure 1. Unless otherwise specified, that convention is used in the rest of this page. Glycolbased gas dehydration is a liquid desiccant technology for removing water from natural. Pdf natural gas dehydration process simulation and. First, we will describe the cpa equation of state and development of the model parameters, then provide an overview of natural gas dehydration process and btex emission requirements, and discuss how dehydration is modeled in aspen hysys. Glycol dehydration is a liquid desiccant system for the removal of water from natural gas. Glycol teg as the dehydrating agent or absorbent to examine the water content of the. Pdf the dehydration unit of a plant that processes natural gas uses.
In this thesis, the sweetening process as well as the two dehydration technical. Queries on teg gas dehydration industrial professionals cheresources. V10, aspen hysys can be used to model dehydration with teg, meg and deg. The dehydration process also helps to prevent corrosion and hydrate formation in pipelines. A traditional teg dehydration process has been simulated using the pengrobinson equation of state 9. The ngl contenthydrocarbon dew point of the sales gas is the same as that of the feed gas. However, hysysglycol should be used with caution at lower lts pressures less than 2,500 kpa. Process modeling using hysys natural gas dehydration with. Example solid desiccant dehydrator twin tower system 9 figure 2. Triethylene glycol teg dehydration is the most commonly used method for removing water vapor from raw natural gas and natural gas liquid ngl streams. Control parameters suggested by hysys dynamic modelling manual and by luyben 2002 were used as base values for initial tuning. Also, the design of the teg system was adequate to achieve a dew point of about 5oc at 95bars. Circulating teg systems are therefore used only for dehydration. Figure 10 gas dehydration and teg regeneration process with stripping gas 19 figure 11 teg regenerator column design with focus on stripping gas inlet 19 figure 12 gas dehydration and teg regeneration process with stahl column.
Table 4 teg rate and water content teg rate m3hr 3. From expanding capacity to troubleshooting columns, engineers can turn to column analysis, the acid gas cleaning package, and the dehydration modeling in the continually enhanced aspen hysys for topnotch accuracy and smooth workflows. An example of natural gas dehydration, using teg, was built with prosimplus. In this work, the effect of triethylene glycol teg flowrate on the water content in dry product gas, the teg loss rate, and the btex i. Investigate how templates and subflowsheets can streamline and organize simulation efforts. Teg triethylene glycol is the primary solvent used in gas processing industry to dehydrate gases. I am currently trying to model a teg dehydration unit in hysys. Development of processes for natural gas drying core. With all units optimally specified during the process, the lean teg inflow rate was varied with the water content in the dry gas product stream of the contactor column. Simulation study article pdf available in the canadian journal of chemical engineering 83 may. Gp 4710 glycol dehydration and regeneration 0900a86680328157.
Start your 1day online trial today to take a guided tour and test drive the functionality and workflows that enable optimization in the. This document entitled chemical process simulation and the aspen hysys v8. Propak has designed teg glycol regenerators as direct fired, hot oil heated and electric emersion heated. Dehydration by using triethylene glycol teg there are numbers of liquids that can be used to absorb water from natural gases such as calcium chloride, lithium chloride and glycols. Triethylene glycol teg and amine absorption are the commercial technologies for these applications. Reset energy typically provides regenerators with heat duties that range from 0.
Pdf impact of stripping gas flow rate on triethylene. Better process understanding can help guide decisions to reduce costs and. Then, process was initialized in dynamic state and a manual finetuning step was performed to reduce oscillations. I do not own this song, all credit and rights goes to the band and the writers. A significant cost item for the circulating teg system is the high pressure contacting tower.
Natural gas dehydration 5 temperatures and the absorbed water is boiled out from teg during regeneration in a reboiler at high temperatures. The sales gas is flashed to the component splitter, this will remove completely the teg in the sales gas because one of the criteria used to determine the efficiency of a dehydration facility is. It has long been recognized that the dehydration of natural gases is necessary to ensure efficient operation of. E12 gas deshydration natural gas dehydration unit with. Methane, volatile organic compounds vocs, hazardous air pollutants haps from reboiler vent methane from pneumatic pump and valves. Queries on teg gas dehydration industrial professionals cheresources free download as pdf file. Introduction water vapor is the most common undesirable impurity in gas streams. This water causes several problems in downstream processes and equipment, such as corrosion or freezing in pipelines at relatively high temperatures. Water vapor can cause hydrate formation at low temperatures and high pressures or corrosion when it is in contact with hydrogen sulfide h.
Chapter 18 of gas conditioning and processing 1 presents the process flow diagram and the basics of glycol units. Simulation and optimization of the utilization of triethylene glycol in. The hysys simulation is conducted with the glycol package, which is created specifically to simulate gas dehydration, and pengrobinson. Teg and monitor the amount of water removed at each addition of teg. Impact of stripping gas flow rate on triethylene glycol losses from glycol regeneration unit. It is the most common and economical means of water removal from these streams. A common method to remove water from natural gas is glycol dehydration.
Dehydration with aspen hysys validation of the cpa. The entire dehydration process has also been simulated in hysys, with two thermodynamic packages. Dynamic simulation and analysis of slug flow impact on. Glycols typically seen in industry include triethylene glycol teg, diethylene glycol deg, ethylene glycol meg, and tetraethylene glycol treg.
Natural gas dehydration, khurmal dome, glycol, process simulation, aspen hysys, process optimisation. These regenerators are custom designed to meet customer gas specifications and can guarantee outlet water content as low as 2 lbmmscf. Sivalls tanks, inc odessa, texas 1976 laurance reid gas conditioning conference the dehydration of natural gas is defined as the removal of the water that is associated with the natural gas in the vapor form. Glycol dehydration1 heat exchanger water purification. The impact of stripping gas flow rate on triethylene.
It is performed for a number of reasons, the two most important of which are to dehydrate raw gas so that it meets sales pipeline specifications and to prevent hydration formation and. Glycol dehydration is a liquid desiccant system for the removal of water from natural gas and natural gas liquids ngl. Queries on teg gas dehydration industrial professionals. The impact of stripping gas flow rate on triethylene glycol losses. Natural gas ng dehydration and sweetening are the main processing steps to avoid pipeline plugging and corrosion caused by the presence of water and co 2. Each tutorial guides you stepbystep through the complete construction of a hysys simulation. Lean teg is then pumped in p200 ab and feed the contactor d200 head stream 16. The different teg regeneration methods were implemented in aspen hysys, a widely used process simulator in the oil and gas industry, with the glycol package. In natural gas systems, removing water vapor reduces pipeline corrosion and eliminates line blockage caused by hydrate formation. Removal of water from natural gas by lowering the dew point temperature of the natural gas. Discover how aspen hysys allows rapid flowsheet construction and bidirec tional calculations.
Glycol dehydrator design manual 1976 heat exchanger pump. Propak has been manufacturing molecular sieve dehydration units for over 20 years. The effect of nitrogen stripping rate on teg losses from glycol regenerator tower, teg lean wt. Chemical process simulation and the aspen hysys v8. For plants where significant amounts of propane or ethane are recovered, the industrystandard dehydration technology is molecular sieve desiccant.
Glycol dehydration1 free download as powerpoint presentation. Optimization of natural gas dehydration using triethylene. Natural gas usually contains a large amount of water and is typically watersaturated. Simulations of the natural gas dehydration process in aspen hysys have been performed with emphasis on glycol regeneration by oi and selsto. Propak also builds teg dehydration units for sweet or sour gas applications. The tutorials you choose to work through will likely depend on the simulation topic that is. The idea of a dehydration system for gas processing is a fairly simple one. Thus, of the four glycols, teg is the best suited for dehydration of natural gas. The different teg regeneration methods were implemented in aspen hysys, a widely used process simulator in the oil and gas industry, with the glycol package, based on the twusimtassone tst cubic equation of state. I have sucessfully done it in promax before, but first time in hysys. The teg was flowed at different rate to determine the water content in the processed natural gas stream, as shown in the table and curve below.
In order to ensure design options meet the necessary requirements of saving capital, solvent or energy costs, th. In this system, we are only making water dew point specification gas. In glycol dehydration, teg is usually referred to only as glycol. The different teg regeneration methods were implemented in aspen hysys, a widely used process. In this tip of the month totm, the effect of stripping gas rate on the regenerated lean teg concentration for several operation conditions will be studied. Typical values for heat exchangers in teg services 52 table 8. Natural gas dehydration unit with teg tri ethylene glycol. Some physical properties of pure teg are given in the. Optimization of natural gas dehydration using triethylene glycol was carried out using aspen hysys process software and regression analysis. Process modeling learn to build process simulations using aspen hysys. Hysys tutorials a1 a1 a hysys tutorials the tutorials section of this manual presents you with independent tutorial sessions.