4 replies to this topic

[walidd_23]

Hello Everybody

 

In the light naphtha isomerization unit, both of hydrogen and light naphtha passed through dryers to eliminate water.

 

we use electric Heater to regenerate these dryers, But as we faced many problems in electrical heater, we want to change it with Fired heater ( with fuel gas ).

 

my question is : what are the steps to achieve fired heater sizing( any documents or excel spreadsheet) ? and can we use software to make the sizing? because in HTRI and HTFS.. the sizing of the furnace like diameter and length of tube are required to make calculation, so how can we use this software to achieve the sizing?

 

 

I am looking forward your answer

 

Regards,

 

 

Walid

[fallah]

Walid,

 

API 560 might help you out getting outstanding points of fired heater design...

[Zauberberg]

If you are not familiar with the design of process furnaces, I'd suggest you get in touch with somebody who does these things for living. You can contact either the manufacturers (e.g. Heurtey, Broach, Petro-Tech etc.) or engineering designers who have extensive experience with fired heaters (e.g. FW, Linde etc.)

 

http://www.heurtey.c...rnaces/refining

http://www.broach.co...s/fired-heaters

http://heat-transfer...aters-furnaces/

http://www.fwc.com/g...eaters.pdf.aspx

http://www.linde-eng...rmal/index.html

[Fired_Heater_Expert]

Walid,

 

The type of heater you refer to is called a Regeneration Gas Heater. One big issue with these heaters is the process inlet temperature which can often be quite low (~15 - 60 deg C).

 

With this low process temperature, the inlet tube temperatures in contact with the hot flue gas can cause the flue gas to condense on the tube surface (flue gas condensation). If there is Sulphur in the flue gas (or other corrosives), this will corrode the process tubes fairly quickly.

 

A mitigating step to minimise the potential of the condensation, would be to arrange the process tubes in a co-current arrangement (process inlets entering the radiant section, instead of the more usual convection section). However, this is not a guarantee that corrosion will not occur.

 

There is a new fired heater software called Heater560 which is very easy to use and will actually carry out the design automatically for you, based on your minimal requirements. So you don't have to input any mechanical data at all such as tube OD size, tube lengths, etc.

 

see more: automatic fired heater design  and  fired heater simulation

[FiredHeater-it]

There is a new fired heater software called Heater560 which is very easy to use and will actually carry out the design automatically for you, based on your minimal requirements. So you don't have to input any mechanical data at all such as tube OD size, tube lengths, etc.

 

 

Hi,

I have two questions:

1. This software Heater560 is for verify only the fired heaters?

2. If yes, what differences there are with FRNC5?

 

Thank you for the answers.