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Involvement of Drizo Process in Gas Dehydration Plant Department of Petroleum and Natural Gas Engineering, Mehran UET, SZAB Campus Khairpur Mir’s
EXPERIMENT:
INTRODUCTION
OBJECT 1: Measure the percentage of impurities in dehydrate water.
Dehydration is the process of removal of water from natural gas and natural gas liquid (NGL). For the purpose of dehydration we use different types of water absorbers such as glycol etc.
OBJECT 2: Measure the quantity of water after dehydration process.
PROBLEM STATEMENT
OBJECT 3: Measure the Glycol efficiency
OBJECT 4: measure the efficiency of dehydrate natural gas.
DEHYDRATION PLANT PICTURE
Due to dehydration process environment will be pollute because of emission of CO2 and benzene, toluene, ethyl benzene, and xylenes (BTEX). There is no specific use of unwanted fluids (BTEX) which are recover from gas dehydration Process. Water is not 100% removed from lean gas.
PROBLEM SOLUTION: Drizo regenerates the glycol by solvent stripping instead of the conventional gas stripping. Solvent stripping allows to obtainmuch higher glycol purities than gas stripping (up to 99.998 wt% instead of the typical 99.95 wt%) and consequently allows to get much larger water dew point depressions: up to 100°C (180°F) and even higher in some cases. The solvent required by the Drizo process is usually obtained from the BTEX present in the natural gas itself and in most cases, the process will even produce some liquid hydrocarbons. Glycol solvent stripping by condensates (instead of conventional gas stripping) allows:
Diagram of natural gas dehydration plant with and without Drizo process
Higher glycol purities down to < 1 ppmv H O in treated gas. Reduced BTEX / CO2 emission. Possible recovery of liquid aromatics. Drizo™ solvent is not a solvent, it is a hydrocarbon recovered from feed gas. It is the cheapest technology for very low water dew points.
OBJECTIVES
Natural gas dehydration plant Without drizo process
Natural gas dehydration plant With drizo process
Determine the environment impact.
MEASUREMENTS:
Determine the process of increasing gas efficiency of lean gas.
CONCLUSION: Drizo process shows high performance upto 99.99+..%
Determine the use the waste product which is getting from gas dehydration process.
NOVELTY
It is environment friendly. It is cheapest way for producing high efficient gas.
As water absorber are use in dehydration process they also absorb hydrocarbons which are the reason of pollution but this process is running on
the impurities which are taken from dehydration such as BTEX.
A process easy to operate and offering high flexibility.
References:
The cheapest technology for very low water dew points. Dew point depressions to 110°C / 200°F. Suitable to retrofit conventional glycol regeneration unit at minimal CAPEX. Below ppm gas dehydration performance.
http://www.ogj.com/articles/print/volume-100/issue-44/ processing/improvements-stabilize-drizo-glycolenhancement-process.html Wikipedia
Environmentally friendly installations, with reduced BTEX / CO emissions and liquid aromatics recovery.
MATERIALS: Wet Gas Glycol (diethylene and triethylene) Drizo Solvent (50% n-heptane & 50% Benzene)
