M
hello,
we are going to establish a boiler with 6 burners and 187 ton/hour capacity, the generated steam of this new boiler will injected to the common outlet header of four existing (old) boilers, control of the old boilers is a pneumatic system that adjusts the firing rate to constant the pressure of the outlet header (there is a pneumatic signal that's caused by a flow transmitter, it's name plant master, by this way these four boilers are pneumatically controlled, all of 4 boilers are in service continiously.)
In the new boiler we propose DCS for control and supervisory (managing operation of boiler), and a PLC for BMS (interlocks and safe operation requirements). and now, there are 3 bugs for us:
1. choice of DCS and PLC manufacturer and model (vendor).
2. coordinations between this new and fast control system by the existing slow control system until the total plant (5 boilers) operates in a effective and unique form.
3. as i told, the existing boilers and all of other plants in this refinery are controlled pneumatic and in the future they want to revamp the control system into DCS/FCS, but now we are looking for a suitable method for making communications between this boiler control system and the revamped control system for future, while we don't know anything (e.g. manufacturer, model, vendor...) about this revamping project, i want to know exactly which servers and related protocols can help us in this way.
but there is another question by me:
in the ESD system, when we need a switch as a sensing element that use in ESD logic, is it better to place a transmitter on the line and in the software explore the switch from the 4-20mA signal, that's coming from trnsmitter (soft switch) or a hard switch on the mentioned line? (which one is more reliable?)
before, i'm really indebted to you forever, thank you,
regards.
we are going to establish a boiler with 6 burners and 187 ton/hour capacity, the generated steam of this new boiler will injected to the common outlet header of four existing (old) boilers, control of the old boilers is a pneumatic system that adjusts the firing rate to constant the pressure of the outlet header (there is a pneumatic signal that's caused by a flow transmitter, it's name plant master, by this way these four boilers are pneumatically controlled, all of 4 boilers are in service continiously.)
In the new boiler we propose DCS for control and supervisory (managing operation of boiler), and a PLC for BMS (interlocks and safe operation requirements). and now, there are 3 bugs for us:
1. choice of DCS and PLC manufacturer and model (vendor).
2. coordinations between this new and fast control system by the existing slow control system until the total plant (5 boilers) operates in a effective and unique form.
3. as i told, the existing boilers and all of other plants in this refinery are controlled pneumatic and in the future they want to revamp the control system into DCS/FCS, but now we are looking for a suitable method for making communications between this boiler control system and the revamped control system for future, while we don't know anything (e.g. manufacturer, model, vendor...) about this revamping project, i want to know exactly which servers and related protocols can help us in this way.
but there is another question by me:
in the ESD system, when we need a switch as a sensing element that use in ESD logic, is it better to place a transmitter on the line and in the software explore the switch from the 4-20mA signal, that's coming from trnsmitter (soft switch) or a hard switch on the mentioned line? (which one is more reliable?)
before, i'm really indebted to you forever, thank you,
regards.