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...
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
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 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...
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...
EO feed(OP=12 barg, OT= -25 C) to the reactor (OP=12 barg, OT=215 C),and feed line seems climb upward to the Reactor top.
I am just curious why this liquid fluild piping instead of gas fluid go upward.
Morever, in our process, we don’t use a triconics interlock system with at least 2 - double...
Dear
I would like to know which Coriolis or Vortex flow meter is better for the steam fluid and why is the reason for
that.
As I know vortex shedding flow meter is wildely used type of oscillaotry flow meter. The frequency of the vortex is directly proportional to the velocity of the fluid...
Dear
I would like to know which Coriolis or Vortex flow meter is better for the steam fluid and why is the reason for that.
As I know vortex shedding flow meter is wildely used type
of oscillaotry flow meter. The frequency of the vortex is directly proportional to the velocity of the fluid...
As we know that D/P level transmitter’s sensing line going to the upper tank
Connection becomes a “reference leg” of constant pressure head.
Care must be taken in applying reference legs when the atmosphere may
Alternate from condensing to non-condensing. So, wet-legs defines as that it
Can dry...
Dear all Professinal engineers
I am sorry to bother you this trivial question. I tryied to establish procedures of purging and draining of batch reactor after last batch.
The procesure is following ( and drawing is atttached)
* The Reactor ready to purge( but I am not sure DO I HAVE TO...
Dear Aspen plus professional users:
I have a very simple question need to bother you.
I would like to know any way can copy the
massive process data from on aspne zyqud file to
other empty one.
And, Is any way can edit the most top of the zyquad
datasheet\?
Thank you very much for your...
