Dear expert
I have some questions below.
1. Suction specific speed of pump and pump operating speed is the same thing or different. It should be different, and what is the relationship between these two characters?
2. As we increase the pump operating speed, the Reynolds no will increase, and...
Sorry
I don't put clear.
Not using water or air to purge the EO pipe when there is EO
running in the pipe.
I plan to use either air/water to purge the EO pipe before it start up.
Thank you so much.
Dear Si
delta flag is means the class break of the pipe.
If the no. of pipe will be changed in the next line,
it should be put the delta flag in the connection.
Thank you
Sory to bother you this trivail.
Ethaonlamine are produce by reaction of ethylene oxice and ammonia. The water increases the reaction rate of EO with ammonia and amines so water can be considerd as a catalyst for reaction. If using water instead of air to purge the EO pipe in the commisioning...
Dear Sir/Madam
Positon in a P&ID don’t correspond to a 3D position. Therefore, the min. distance (yellow mark) in this P&ID seems weired (please see the attach document).
Could anyone please help me what is the difference if this mim. distance is extend to the top line (the triangle break...
I have tried to figure out how to get the entrainment from the vaprozer. In this process, the multicomponent feed reactor is vaporize in the system shown in the attached graph. Liquid reactant feed enters a horizontal kettle vaporizer that is heat by a process stream. Vapor goes to a knockout...
Dear Sir/Madam
I attached part of the P&ID from my project.
Could anyone kindly tell why is the valves and blind flanges set there together? Is any reason behind this?
Thank you so much.
Dear Sir/ Madam
I am sorry to bother you this trivial again. I have tried to get the minimum thermosyphon reboiler height through writing a program in excel.
But, I don’t understand how to get this total pressure drop formula (Please see the attachment), How does this formula come from?
The...
Dear Sir/Madam
I have a trivial question to bother you and it is about vapor density calculation question . I tried figure out using excep spreadsheet to calculatie the minmium vertical thermosypon reboiler height, but I don’t quite know how to get the vapor density ( please see the attached...
Dear all
I am not sure the control scheme in the attachment is match the following description I wrote.
TIC-001 and TIC-120 are temp to temp cascade control scheme.
if the reactor temp is increasing, the reactor temp controller increase theset poit of TIC-120 for the cooling water flow, which...
Dear all
Could anyone please kindly help me to tell what kind of PSV sizing software is used in my attachment?
And, what kind of free psv sizing sofware could I get in the industry? I am not quite familar in using any psv software cause I use small excel program developed from the senior...
Alkoxylations are commonly performed in industry for the production of surfactants and polyglycols by means of a simple semi-batch liquid-stirred reactor
During the EO addition to reactor, pressure will increase due to the EO vapour partial pressure and the compression of the nitrogen present in...
I make a simple calculation for this hydraulic question, but not sure that is correct or not.
(pls see the attachemnt )
Thank you so much.
http://files.engineering.com/getfile.aspx?folder=3d3ea892-197f-42df-b11b-caa5d0514b53&file=test1.pdf
I tried to do the condenser vacuum hydraulic check, but I don’t how to start it.
It seems very dumb cause I know this similar topic has discuss a lot in the forum.
Please bear with me.
My goal is to (1.) calculate the min. elevation of the reactor condenser?
(2) calculate the height of flooding...
The ejector discharge pressure and temp condtion in this vacuum systme is put in the new post.
The discharge pressure from condesor increase from left to right.
But I still don't understand the open valve sequence in the vaccum ejector system when system need more vaccum.
Please give me more...
I have a recactor, condensor, and vaccum steam ejector. temperature. The operation manual is written in the following:
1. waits until pressure in the Reactor is less than 150 mbara and then opens XV-B (steam to the second ejector stage).
2. Then the sequence waits until pressure in Reactor is...
Reboiler controls can be classified into flow controls and temperature controls as
shown in Fig. 4-9 (a) and Fig. 4-9 (b).(please see the attachment)
Which should be used depends on the purpose and conditions of the tower.
The problem here is the flow measuring point and the location of the...
I have a transmitter and its signal will be used as a second shutdown input with 1oo2 voting and the control valve will be used as a second shutdown mechanism. (Pls see the attachement Figure 15-3.) common equipment is used, the BPCS cannot be considered an independent layer of protection. It is...
I have a tank with how water supply/return through the
tank. The tank OT=60 degree C, and the discharge pump
OT=50 degree C. I try to decide what is approiate
High/Low temperature value. Could I just use High Temp alarm =70, and low temp alarm=50. But I am afraid
that the low temp alarm 50...
