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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...

THANKS AGAIN, IT SEEMS IT IS A COMPLEX BUT INTERESING ISSUE. REGARDS, ROKER

THANK YOU ALL FOR YOUR HELPFUL ADVISE. ROKER

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...

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...

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...

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...

Thank you all for your contribution to the subject. sometimes you need "external" opinion for convincing your colleague. regards, roker

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...

Thank you GHartmann, By separator I meant an oil water separator like an API separator which is 20 by 80 meters concrete pond which will be covered by a fix cover, the vapors will be flowing from the vapor space through openings in the cover via ducts to a blower and to a thermal oxidizer, at...

Dear GHartmann, Sorry for the late reply, we are covering an oil water separator in order to collect the VOC with a blower to the thermal oxidizer, the vapors are not with the same composition so there is no constant or known dew point. the source are refinery processes. what is the recommended...

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

Dear TD2K, We intend to do some experiments using the atmospheric distillation bottom's, the liquid will be cooled to about 200 C and stored in the tank from there it will be pumped to the downstream experiment equipment.

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...

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

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

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...

Thanks all, We will use 1 inch pipes and the length after the mixing to the furnace is about 2 meters. Should the tee be a special one? since it is a pilot the ratio is important. Will an ejector be "overkill" ? Regards, roker

Thanks TD2K, We intend to mix 25 kg/hr 14 barg steam at 250 C with 25 kg/hr 6 barg air at 25 C, the mixture will be routed to a furnace. Hope these data clarifies the issue. regards, roker

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