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  • Users: roker
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  1. roker

    FUEL STORAGE TANK VENTILLATION

    HELLO, WE HAVE A FUEL TANK WITH AN INTERNAL FLOATING ROOF AND A FIXED ROOF ABOVE, IN ORDER TO MAINTAIN ZERO EMISSION TO THE ATMOSPHERE CAN WE USE VACUUM BREAKERS FOR INBREATHING AND WHEN OUTBREATHING TO CONNECT THE OPENINIGS TO A HEADER TO A THERMAL OXIDIZER, I MEAN THAT WE WILL DIVIDE THE...
  2. roker

    ON LINE CONTINUOUS pH CONTROL

    Dear all, What is the reliable, accurate and quick response way for on line pH control for waste water flowing in a 16" pipe, 500 m3/hr, do we need one electrode for the injection of acid or base solution and a second electrode, after the mixing time pipe length required to achieve the desired...
  3. roker

    STEAM RELEASE TO THE FLARE SYSTEM

    Hello, In order to avoid steam vapor plume, from a third stage vacuum system ejector outlet, to be seen in the atmosphere, it was advised to connect this steam to the flare system. To me it seems a wrong idea but I have not strong reasons to convince it. Did someone faced such a situation and...
  4. roker

    DISSOLVED GAS FLOATATION (DGF) INLET FLOW CONTROL

    Hello, We are designing a DGF with gravity flow feed , since there is no enough pressure available for a control valve what would be the best way to control the inlet flow for the design rate. The feed line diameter is 10". It is really a general subject for any gravity flow control to a tank...
  5. roker

    VERTICAL GAS-LIQUID SEPARATOR TANGENTIAL INLET NOZZLE

    Hello, Do we need a wear plate inside a separator when using a tangential inlet ? if yes, where to install it with respect to the inlet ? since the flow pattern is along the perimeter and not "against" the separator wall may be the wear plate is not required. Please advise your opinion, the...
  6. roker

    GAS LIQUID VERTICAL SEPARATOR WITH BAFFLES

    Hello, we are designing a vertical separator for an air stream with water, the inlet will be through a tangential nozzle, at the outlet a demister will be installed. we consider to install also two baffles below the demister, what are the guidelines for the baffle cut (percent of diameter or...
  7. roker

    CONDENSATION IN INLET DUCT TO THERMAL OXIDIZER

    Hello, How can I eliminate water condensation in the inlet duct to a thermal oxidizer, ambient temp at day is about 30-40 deg. C and at night can reach 5 deg. C. Insulation is enough or should I use a condenser with a KOD ? Regards, roker
  8. roker

    ATMOSPHERIC DISTILLATION BOTTOM TANK

    Hello, We intend to do some tests on atmospheric crude distillation bottom's, for this a tank of 5 to 10 m3 will be used as the start point of the tests. The tests will be done in the refinery. Can this tank be vented to the atmosphere (with a flame arrester) or with a pressure control with...
  9. roker

    SLOPS OIL / WATER GRAVITY SEPARATION

    Hello, Is it a correct assumption that the maximum phase separation that can be achieved is the solubility of water in oil and oil in water ? Does centrifuge phase separation achieve separation levels higher than gravity separation? regards, roker
  10. roker

    PHARMACEUTICAL WATER FOR INJECTION ELECTRIC HEATING

    Hello, I am looking for an electric heater for heating the WFI hot loop (about 80-85 C ), shell and tube heat exchanger are offered with hot water or steam, it has special demands like SS316L electropolished, does some has experience with such an electric heater? regards, roker
  11. roker

    WFI CIRCULATION LOOP

    Hello, We are installing a new water for injection distribution loop in a reaserch laboratory, the tank is 200 liters with a circ pump of 1000 lit/hr. All points of use require ambient (25 C) temperature water. Should we install a hot circulation (80-85 C) loop with cooling at the points of...
  12. roker

    MIXING STEAM AND AIR

    Hello, What is the best way (simple and low cost) for mixing steam and air low flow streams (about 25 kg/hr)? regards, roker
  13. roker

    KETTLE REBOILER WEIR

    HELLO, CAN A KETTLE REBOILER OPERATE WITH NO WEIR, HOW OPERATION WILL BE AFFECTED? REGARDS, ROKER
  14. roker

    AMINE TREATING PARTICULATE FILTRATION

    Dear all, Since the particulates load on the filter is not stable what are the guidelines for defining and selecting the proper filtration area for example as a function of amine flow. regards, roker
  15. roker

    HEI Design conditions

    Hello to all, We received a specification for a vacuum unit of an Air Cooled Surface Condenser, one of the operating conditions is :"HEI DESIGN CONDITIONS", please can one advise this demand? Best regards, roker
  16. roker

    PULSATIONS IN A TWO PHASE FLOW LINE

    Hello to all, We have a 12" line downstream a control valve station with two phase flow of crude oil inlet to a distillation column, the line is 15 meters long. We prefer to leave the control station in place, can someone assist in a solution to eliminate the pulsation of the line? In...
  17. roker

    AMMONIA STORAGE HEAT ABSORBTION

    Hello all, What heat transfer coefficient should be used for calculation of heat absorbed through the surface of an ammonia storage tank at about -35 C (the ambient temp is around 30 C). Best regards, roker
  18. roker

    STEAM GENERATOR RELIEF VALVES

    Hello all, We are using a kettle type heat exchanger to produce steam from high temperature streams flowing in the tubes. How many relief valves should be installed on the shell side (the steam produced side) which are in service at any time of operation and according to what code this is the...
  19. roker

    NPSH required AT THE END OF OPERATING CURVE

    Dear all, When evaluating a pump proposal is it realistic to check if the NPSH AVAILABLE is higher than the required by the proposed pump? if yes, what are the reasons and does it have any "written" rules like tha API or other codes. Regards, roker
  20. roker

    WATER COOLED HEAT EXCHANGER TEMPERATURE LIMITATIONS

    Hello all, Are there any limitations for the process fluid inlet temperature to be cooled with cooling tower water, for example can we cool a process stream at 120 C with water at 30 C ? regards, roker

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