August 17, 2004 at 12:08 am #4408
From: JULIO RODRÍGUEZ
Date: 05 Aug 2004
Please, can help me with information about the “high frequency of online spalling”?, where I can obtain referred information to the subject?, which are the variables that affect the process?, where it happens with more east frequency problem?, and which are the possible solutions?. I appreciate its collaboration to them, Julio Rodriguez email: JCRCARPIO@HOTMAIL.COM
Transferred from the Coking.com Discussion on August 16, 2004 by the Coking.com administrator.
August 18, 2004 at 12:53 pm #7890
Julio, Do you mean how frequent you spall? We go by the highest skin temperature, usually near the outlet of the pass. We monitor flow (we use BFW), inlet pressure, and pass skin temperature near outlet and the outlet temperture. We do one pass at the time. On line spalling is done every 7-8 months (depends on what skin temperature target you use).
June 10, 2005 at 11:04 pm #7783
I suppose you either use P5 or P9 tubes for coker. I would like to know the following
1) What is the target skin temp. you use.
2) What is its’ relationship with design pr. of the coker heater ?
October 8, 2005 at 5:41 pm #7735
Re: online spalling
Date: 31 Jul 2005
we recently underwent our first spall, 2 passes in the same bay, common convection section, we didn’t see the results we expected, we had some skins in the 1240 upwards range when we started, is this the biggest problems, should spalling take place at below 1200, would we see results then, thanks
…copied from the old discussion forum
October 21, 2005 at 5:01 am #7730
how to proceede OLS your DCU?
we consider OLS when skin temp at 1130.
And change temperature from 932F to 1200F During OLS.
2 days are required for 1 pass.
maximum 5.5 ton/hr BFW
let me know yours
December 6, 2005 at 9:44 pm #7706
Can anyone share any experience dealing with controlling coke fines at coker water runoff basin? What would be the best effective measures?
March 27, 2006 at 7:06 am #7632
You can have the pit crane operator clean the fines in-front of basin, then put some fresh coke fines to the front to help filter the fines out.
The crane operator can then clean the basin fines collector 2 to 3 times a week. That’s what we do at our coker.
September 7, 2007 at 11:51 pm #7289
We set the online spalling limit at 1184F (P9 tubes) and during the spall, increase the temperature to 1250F and spall for approximately 24 hours.
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