Hydrocarbon condensate stabilizer and a method for producing a stabilized hydrocarbon condenstate stream
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Solution Overview
Problem
The existing hydrocarbon condensate stabilizing processes face issues with temperature profile disturbances and low dew point in stabilizer columns due to unstabilized hydrocarbon condensate streams being fed with high volatile components, leading to inefficient stabilization and potential liquefaction challenges.
Innovation Solution
A method involving partial evaporation of the unstabilized hydrocarbon condensate stream in a feed-effluent heat exchanger, followed by feeding the mixed phase stream into a stabilizer column, where it is separated into a liquid reflux stream and a vapour effluent stream, with the reflux stream being recycled to maintain a stable temperature profile and improve dew point management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the unstabilized hydrocarbon condensate stream is indirectly heat exchanged against the liquid stream discharged from the bottom of the stabilizer column, then the condensate stream is heated, but the temperature profile in the stabilizer column is disturbed
Solution Approach 1:
A third stream (coolant or heating medium) is introduced as an intermediary in the heat exchange process. The unstabilized hydrocarbon condensate stream is heat exchanged against this third stream instead of directly against the stabilizer column's liquid stream, thereby avoiding direct thermal interference with the column's temperature profile while still achieving the desired heating or cooling of the feed stream
Solution Approach 2:
The heat exchange process is segmented into separate stages or zones. The heating/cooling of the unstabilized hydrocarbon condensate stream is performed in a dedicated heat exchanger unit that is thermally isolated from the stabilizer column's internal temperature zones, allowing independent control of feed stream temperature without disrupting the column's established temperature gradient
2Quantity of substance
If the unstabilized hydrocarbon condensate stream contains high amounts of volatile components, then the dew point is too low, but stabilization efficiency is reduced
Solution Approach 1:
The unstabilized hydrocarbon condensate stream undergoes preliminary treatment (such as partial condensation, refrigeration, or compositional adjustment) before entering the stabilizer column. This preliminary action raises the dew point of the feed stream by removing or condensing excessive volatile components in advance, ensuring that the column receives a feed with appropriate volatility characteristics for efficient stabilization
Solution Approach 2:
The physical or chemical parameters of the unstabilized hydrocarbon condensate stream are modified before stabilization. This may include changing temperature, pressure, or compositional parameters to adjust the dew point to an optimal range, thereby improving the effectiveness of the subsequent stabilization process in the column
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach stabilizes the hydrocarbon condensate stream effectively, enhancing the temperature profile and dew point control within the stabilizer column, thereby improving the efficiency of the liquefaction process and reducing the cooling duty required for further refrigeration.
Implementation Method 1
partially evaporating the unstabilized hydrocarbon condensate stream comprising indirectly heat exchanging the unstabilized hydrocarbon condensate stream in a feed-effluent heat exchanger against an effluent stream
Implementation Method 2
partially evaporating the unstabilized hydrocarbon condensate stream
Implementation Method 3
passing a coolant through the overhead condenser in indirect heat exchanging contact with the overhead vapour stream, whereby passing heat from the overhead vapour stream to the coolant as a result of which partially condensing the overhead vapour stream
Implementation Method 4
partially condensing the overhead vapour stream
Data Source
AI summary
A mixed phase unstabilized hydrocarbon stream is created by partially evaporating an unstabilized hydrocarbon condensate stream, including indirectly heat exchanging the unstabilized hydrocarbon condensate stream against an effluent stream in a feed-effluent heat exchanger. The mixed phase unstabilized hydrocarbon stream is fed into a stabilizer column. A liquid phase of stabilized hydrocarbon condensate is discharged from a bottom end, while an overhead vapor stream consisting of a vapor phase comprising volatile components from the unstabilized hydrocarbon condensate stream is discharged from a top end of the stabilizer column. The overhead vapor stream is passed through an overhead condenser. The resulting partially condensed overhead stream is separated in an overhead separator into a vapor effluent stream and an overhead liquid stream. The effluent stream against which the unstabilized hydrocarbon condensate stream is heat exchanged in the feed-effluent heat exchanger comprises the vapor effluent stream.