Flare Gas Recovery Unit
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John Zink Hamworthy Combustion > Products > Flare Gas Recovery Systems > Process Diagram Process Diagram John Zink Hamworthy Combustion Flare Gas Recovery Unit Our recovery process is incorporated with your flare system to safeguard company personnel and the environment. The following process diagram demonstrates the integration and function of a John Zink Hamworthy Combustion flare gas recovery system with an operating flare process. John Zink Hamworthy Combustion’s experienced team of skillful engineers will thoroughly evaluate your flare system, process conditions and project goals, and select the compressor technology that is best-suited for your specific application. Liquid Ring (shown below) Reciprocating Screw Sliding vane A flare system consists of a vapor header that collects the flare gases from various sources, a knockout vessel, a liquid seal vessel, and the flare itself. The flare gas recovery unit connection is typically located between the knockout vessel and the liquid seal. Any liquids in the flare gas should be removed before introduction into the flare gas recovery unit. The primary control Page 1 of 2 Process Diagram « John Zink Hamworthy Combustion 15/05/15 http://www.johnzink.com/products/flare-gas-recovery/process-diagram/
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Transcript of Flare Gas Recovery Unit
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John Zink Hamworthy Combustion > Products > Flare Gas Recovery Systems > Process Diagram
Process DiagramJohn Zink Hamworthy Combustion Flare Gas Recovery Unit
Our recovery process is incorporated with your flare system to safeguard company personnel andthe environment. The following process diagram demonstrates the integration and function of aJohn Zink Hamworthy Combustion flare gas recovery system with an operating flare process.
John Zink Hamworthy Combustions experienced team of skillful engineers will thoroughlyevaluate your flare system, process conditions and project goals, and select the compressortechnology that is best-suited for your specific application.
Liquid Ring (shown below)ReciprocatingScrewSliding vane
A flare system consists of a vapor header that collects the flare gases from various sources, aknockout vessel, a liquid seal vessel, and the flare itself. The flare gas recovery unit connection istypically located between the knockout vessel and the liquid seal. Any liquids in the flare gasshould be removed before introduction into the flare gas recovery unit. The primary control
Page 1 of 2Process Diagram John Zink Hamworthy Combustion
15/05/15http://www.johnzink.com/products/flare-gas-recovery/process-diagram/
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variable of the John Zink Hamworthy Combustion flare gas recovery unit is flare system headerpressure.
As the flare header pressure reaches the predetermined pressure control set point, a liquid ringcompressor starts up and begins to compress the flare gas. The compressor uses an operatingliquid, usually water, to perform the work of compression on the recovered gas. The operatingliquid is cooled in a shell-and-tube heat exchanger, evaporative cooler or air-cooled heatexchanger to control compressor discharge temperature.
The compressor discharges the gas into a three-phase separator that separates the operating liquidfrom the flare gas and then the condensed hydrocarbons from the operating liquid. Instead ofventing process vent streams into the flare system, the compressed gases are made available to theoperating plants fuel gas supply or possibly as a process feedstock.
Integration and control of a flare gas recovery unit is of critical importance. For example, caremust be exercised in the design of the recovery system to prevent application of a vacuum to thevapor header that might draw in air and create a flammable mixture in either the flare header orthe fuel gas system.
When all compressors are operating at full capacity and if the process vent flow rate continues toincrease, flare gas will begin to pass through the liquid seal and flow to the flare stack. Therefore,the safety function of the flare system is maintained in the event of process upset conditions.
To discuss a customized solution for your operation, contact John Zink Hamworthy Combustionsflare gas recovery group.
Page 2 of 2Process Diagram John Zink Hamworthy Combustion
15/05/15http://www.johnzink.com/products/flare-gas-recovery/process-diagram/
