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Hi, We have condensate flash tank at our urea plant. Condensate inlet pressure to the tank is about 75 psi. By flashing we are getting 55 psi steam. Problem we are facing is the hammering in the tank. There is vibration in the tank and the attached piping all the time. Help in this regard will...

Hi, We have condensate flash tank at our plant. Condensate inlet pressure to the tank is about 75 psi. By flashing we are getting 55 psi steam. Problem we are facing is the hammering in the tank. There is vibration in the tank and the attached piping all the time. Help in this regard will be...

Our existing process air heater is shell and tube, 16 feet in length, 195 tubes, 1.5" OD, 16" air inlet and 16" air outlet. Air is in the tubes. 200 psi steam is on the shell side. Air flow is about 6000 scfm at 5 psi to the heater. This exchanger is about 30 years old and now giving problems...

Somebody could guide me about process air heater design complete calculations. Exchanger is shell and tube and heating is with 200 psi steam. Inlet temperature of air is 70F and required outlet is about 200F. Thanks.

Somebody could tell me about process air heater (shell and tube) design (air heating with steam) calculations. Thanks.

Where i can find the Ammonium carbamate specfic gravity at different temperature and pressure? Thanks.

Where i can find the carbamate specfic gravity at different temperature and pressure? Thanks.

Our main purpose is to utilize 15-20% hydrogen (hydrogen is present in CO2 coming from ammonia plant) in the urea plant off gas as a fuel in the burners of ammonia plant primary reformer burners or in utility boiler burners as a fuel by mixing it with natura gas. My main cocern is the presence...

Thanks for very knowledgeable reply.

Hi, I was looking for the Urea hand book "Urea its properties and manufacutre" by G.T. Chao. Somebody will tell me where i can purchase this book online? I could not find it on the net. Thanks.

Thanks for very detailed guidance. Now there are two things. (1)Is there any effect of giving gas ammonia instead of liquid ammonia on the safety popping at very high pressure? (2)Design ammonia temperature is 250F and we are heating ammonia upto 285F.Is this contributing to safety popping...

We are venting our excess ammonia from urea plant into two scrubbers those are not packed bed. We are using nitric acid to neutralize ammonia and in the end giving ammonium nitrate to UAN plant. We are facing two problems. (1)pH control is very eratic. Unable to control pH at 6 or 7. (2)Even at...

Thanks for reply. Is the above mixture can be burn as it is? I heard that ammonia %age in air 16-30% is burnable. So the mixture of gases containing 33% ammonia, 15% hydrogen, 08% oxygen and 44% nitrogen will burn by mixing it with natural gas going to burners of primary reformer at ammonia...

Our urea plant off gases contain 33% ammonia, 15% hydrogen, 08% oxygen and 44% nitrogen. I was thinking to burn these gases in primary reformer of ammonia plant as fuel.Is this possible? How ammonia could be removed from these gases to increase concentration of hydrogen without spending much...

Thanks for reply. I am worried about that above critical temperature ammonia will be gas regardless of the pressure. But as a principle our ammonia feed to urea reactor should be in liquid state. Secondly at present we are heating our ammonia feed above critical temperature but unable to have...

Hi Guys, If ammonia feed to reactor at urea plant is heated above it's critical temperature, what are the negative and positive effects on the process and plant life. Thanks.

Hi, I was looking for the Urea hand book "Urea its properties and manufacutre" by G.T. Chao. Somebody will tell me where i can purchase this book online? I could not find it on the net. Thanks.

Our urea plant off gases contain 33% ammonia, 15% hydrogen, 08% oxygen and 44% nitrogen. I was thinking to burn these gases in primary reformer of ammonia plant as fuel. Is anybody help me in this regard? Is this possible? how ammonia can be removed from these gases to increase concentration of...