Re the shut-down of refinery utilizing chemical cleaning instead of steam purge to avoid H.C emission, if you guys have good experiences and materials please let me know.
We still wonder whether this practice really good in view of cleaning performance. Your comment will be very helpful.
To minimize the amount of contaminated water from amine system during T/A period after system cleaning, If you guys have good recommendation on a method of the cleaning the system, please comment us.
Re the vacuum tower having O/H condenser designed and installed by fixed type cooling water cooler to prevent leakage from atmosphere to system, several questions are raised as below.
1)Fixed type O/H condenser is very difficult to clean
outside tube during T/A period. So, we are considering...
Recently we experienced plugging of strainers(60 mesh) at the inlet of ejectors installed at the vacuum tower overhead in our refinery, to solve this problem questions were made as below. Actually, we want to remove strainer and avoid any operational interuption by the plugging of strainer...
Recently, we experienced sulfur tank roof corrosion and considering installation of steam coil on the outside surface of roof because we think cause of corrosion is condensing of H2S and H2O.
Anybody who has comments about our countermeasure, please inform us.
We have hydrocracker unit followed by lube base oil production unit. This lube base oil unit has been operated with selective iso-dewaxing catalyst and hydro-fininshing catalyst. At the end of run, however, product lube base oil(Group III) color became a little darker. Re this matter, any body...
Recently we experience two operational difficulties for the heater operation.
One is the malfunction fuel oil return ovalmeter which increased fuel oil supply pressure suddenly. Promptly O2 showed almost o% by the increased of oil pressure and increased fuel oil flow.
The other was sudden stop...
We have been operating HMP(H2 manufacturing process) for the production of H2 to the refinery. HMP unit consists of purification section(Hydrodesulfurizer/Sufurizer- H2S Absorber), Reformer Tubes and HTS/LTS Reactors. After 10 days later of S/U, HTS reactor dP has been increasing trend. DP...
As you guys know well, recent high oil price make us focus on more energy saving than ever. If there is good internet site, your information will help me a lot. And, If there are any good best practice especially in refinery on saving energy, would you guys please let me know.
Re the management of valves for the whole refinery, we recently are in deep consideration for " how we sure the activity of the valves when they worked, for the valves not operated during normal operation".
For example, there are some valves
a. that is expected to be used only during S/D or S/U...
We are producing molten sulfur in our refinery with truck loading facility. However, truck drivers seems to be exposed to sulfur fog (or small amount of H2S) when they check level of loaded sulfur in truck. We don't have automatic system for the checking of loaded sulfur, for the time being. In...
Anybody who have good traing practices for Emergency cases such as power failure, steam failure, utility failure and etc.. in view of not only methodology but also important technical point, please let me have that information.
Last year we changed Amine in H2S ABosrber and LPG contactor in Hydrocracker complex from DEA to MDEA actually formulated MDEA. After changing-out, Hydrocracker LPG contactor foaming(and/or emulsion, whatever called) tendancy has been increased, so, we injected silicon type antifoamer...
We have 2 of 270Ton/Day Sulfur Recovery Units and S/D,S/U periods are 6/4 days. Re this, if you guys know any up-to-date S/D and S/U procedure to shorten current 6/4 days to 5~4/3~2 days, please let me know.
Re the stand-by pumps'(such as auxiliary lube oil pump in forced Lube Oil Type pump or recycle gas comp. lube oil pump system generally consist of steam turbine and Motor pump) auto start-up initiated by Level Low Low signal or Pressure Low Low signal in refinery, How do you usually test...
Re the SRU unit Steam Generator after thermal reactor, we experienced frequent failure on the surface of hex head ferrule and have to find out the reason because of higher operating temperature by the introduction of O2 enrichment technolgy after this coming turn-around. Till now , no specific...
If any body who knows new proven technology to improve heater(especially fuel oil burning heater)performance without significant investment, please inform me.
In addition to this, if there is any good web site explaining energy saving tech. also, please inform me.
Re the refomer unit, there is waste heat boiler at the reformer outlet to recover energy from process gas for a steam generation. But, one or 2 years later this waste heat boiler should be opened in order to inspect and clean because of its' loss of performance. This unwanted WHB cleaning...
Re the oily sewer cover in the refinery process area, any body who knows well about the design criteria for the open area of each oily sewer cover and other basic concepts, please let me know those information or contact points.
Because of flow flcutuation in stripper feed heater having 2 pass in our lube base oil production facility, we improvised HP velocity steam line at the inlet of each pass. After injecting HP velocity steam around 2.0 ~ 2.5 t/h to the each pass inlet, pass fluctuation was disappeared but with...
