3 replies to this topic

[Mirayy]

Hi Im engineer in gas and air seperation plants.I want to ask you a question that is important to me. Because my research on this subject didnt find any results.
I have a hydrogen production plant. This plant has 5 storage tanks. We store the hydrogen in these tanks. In an emergency, we start to feed the gas we feed directly from the tanks. However, one of the annelianing of the past week informed us that the coils of the windings were moisture in the gas. We thought that the reason for the wrapped coil was due to moisture in h2. Then we examined the reports and found out the time of the coil when we made the H2 feed from our tank. Then we measured the dew point on the tank. Normally, the dew point between -70 and -80 has dropped to -30. The tank is a tank filled with 43 bar h2 and it is impossible to enter O2 from outside. The double tank stock tanks are specially manufactured.
I question;
1-Where this leak to air maybe O2?
2-Will the gas in the tank get condensed?

[Art Montemayor]

Mirayy:

 

Are you a student or a working engineer?  If you are a working engineer, why do you post in the Student Forum?  Please answer so I can place this post in the correct Forum.

• What do you mean by the term “annelianing”?  Are you annealing a metal (or glass) by any chance?  Please explain.  What do the “coils and windings” have to do with the application? - especially the “wrapped coil”.
• How are you measuring your dew points and PLEASE BE SPECIFIC.  It is very important to make engineering sense when you transmit basic data.  The reference point of the dew point is VERY IMPORTANT.  Do you mean degrees Centigrade?  Is your dew point reference atmospheric pressure?  Or is your dew point taken at the process pressure (whatever that is)?
• Simply mixing hydrogen and air doesn’t generate water (because of the oxygen content in the air).  You need a catalytic effect and the correct conditions.  Atmospheric air is not going to migrate into your 43 bar pressure storage cylinders, so forget that idea.
• You are not going to condense any hydrogen gas in your 43 bar pressure cylinders.

If you are truly getting your hydrogen contaminated with water, then it probably is coming from your process upstream.  You don’t tell us how you generate or obtain your hydrogen, so we can only guess - which is bad engineering indicative of ignorance of what is really happening.  Do you have a solid bed adsorption dryer system drying your hydrogen gas prior to storage?  This would explain your expectation for a low dew point.  If so, are you certain it is operating properly?  A complete sketch of your operation is needed if we are to venture any opinions as to how water migrates into your hydrogen gas storage.

[Mirayy]

Im master student about hydrogen production and engineer in factory.

I mean annealing a metal.Yes wrapped coil. The name of the process in which the hydrogen gas is used Batch annealing furnace line.The function of BAF is to heat cold rolled coils according to the spesific annealing tempratures designed for recrystallizing and bright annealing in a hydrogen.When this happens, the coil that is going to the front turns into a brown color. The cause is that moisture may be present in the hydrogen gas that comes in contact with the coil directly. It may be slightly above the desired dew point.

 

 The temperature of the dew point is the unit of the temperature of the dew. In order to use hydrogen, the temperature of the dew point should be between -70 and -80 degrees.(Referans dew point -70 and -80. I know that if this value goes up, it means that the humidity is rising.There are 3 different devices of the device that measure the temprature of the dew.These devices measure industrial gases.ın the devices, the gauge in the stock tanks is between -20,-30.

 

 

 

 Our hydrogen production process is to produce hydrogen gas by using natural gas by using steam reforming method. In the following, we have flow chart and technical values. However, the hydrogen produced after the buffer tank is separated by 2 divisions. One of them is operated in BAF line and the other is pressurized with compressor and sent to stock tanks.

 

 

 

 

 

[Mirayy]

 hydrogen production line.xlsx   17.64KB   16 downloads

 

We have a solid bed adsorption dryer system drying your hydrogen gas .System is PSA (Pressure Swing Absorption )