Hydrogen reciprocating compressor interlock
Thread Content
Interlock shutdown condition for the hydrogenation reciprocating fresh hydrogen compressor: lubricating oil pressure below 0.15 MPa. Oil injector failure led to shutdown (not in use); the stator temperature of the main motor was greater than 135 degrees. The main motor start switch is closed. Are everyone’s press shutdown conditions the same?
The hydraulic pressure is the same as that in my unit. As for the temperature you mentioned, I’m not sure; I’m a beginner, so this is just for reference
a. Motor bearing temperature is extremely high: 90°C
b. Motor winding temperature is extremely high: 135°C
c. Leakage in the cooling water for the LIAHH811 motor
e. Position of the ZSHH806 turntable device
f. Locking of the ZSHH807 turntable device
g. Low purge pressure of the motor
h. Start/stop buttons on DCS, LOLP, UCP, or LCP
i. High vibration levels
j. Low pressure at the primary inlet (one of two options): 2.38 MPaG
k. Low pressure at the secondary inlet (one of two options): 4.36 MPaG
l. Low pressure at the tertiary inlet (one of two options): 8.44 MPaG
m. Low oil pressure in the frame (one of two options): 0.15 MPaG
n. Pressure at injectors PT847A1 and PT847A2 is low simultaneously, and this condition persists for more than 10 minutes: 0.14 MPaG
o. Extremely high exit temperature of cylinder 3# at the primary stage (one of two options): 138.9°C
p. Extremely high exit temperature of cylinder 5# at the primary stage (one of two options): 138.9°C
q. Extremely high exit temperature of cylinder 6# at the secondary stage (one of two options): 138.6°C
r. Extremely high exit temperature of cylinder 4# at the secondary stage (one of two options): 138.6°C
s. Extremely high exit temperature of cylinder 1# at the tertiary stage (one of two options): 127.3°C
t. Extremely high exit temperature of cylinder 2# at the tertiary stage (one of two options): 127.3°C
u. Motor failure within 5 minutes due to XA842 (from MCC)
v. Failure in loading the motor due to XA843
w. The exciter at XS832 is not synchronized
x. High liquid level in the inlet buffer tank for PLANT ESD at XS817; the outlet electric valve is closed
b. Motor winding temperature is extremely high: 135°C
c. Leakage in the cooling water for the LIAHH811 motor
e. Position of the ZSHH806 turntable device
f. Locking of the ZSHH807 turntable device
g. Low purge pressure of the motor
h. Start/stop buttons on DCS, LOLP, UCP, or LCP
i. High vibration levels
j. Low pressure at the primary inlet (one of two options): 2.38 MPaG
k. Low pressure at the secondary inlet (one of two options): 4.36 MPaG
l. Low pressure at the tertiary inlet (one of two options): 8.44 MPaG
m. Low oil pressure in the frame (one of two options): 0.15 MPaG
n. Pressure at injectors PT847A1 and PT847A2 is low simultaneously, and this condition persists for more than 10 minutes: 0.14 MPaG
o. Extremely high exit temperature of cylinder 3# at the primary stage (one of two options): 138.9°C
p. Extremely high exit temperature of cylinder 5# at the primary stage (one of two options): 138.9°C
q. Extremely high exit temperature of cylinder 6# at the secondary stage (one of two options): 138.6°C
r. Extremely high exit temperature of cylinder 4# at the secondary stage (one of two options): 138.6°C
s. Extremely high exit temperature of cylinder 1# at the tertiary stage (one of two options): 127.3°C
t. Extremely high exit temperature of cylinder 2# at the tertiary stage (one of two options): 127.3°C
u. Motor failure within 5 minutes due to XA842 (from MCC)
v. Failure in loading the motor due to XA843
w. The exciter at XS832 is not synchronized
x. High liquid level in the inlet buffer tank for PLANT ESD at XS817; the outlet electric valve is closed
This is provided by the manufacturer; of course you can make changes, but they must be approved by them.
Our new hydrogen compressor oil injector is not a condition for interlocked shutdown; therefore, the hydrogen production compressor does not have an oil injector
Let’s set 2 values: 1. The pressure in the lubricating oil main pipe is 0.15 Mpa; 2. The temperature of the main motor stator coils is 120 degrees℃
In our case, it’s the high liquid level in the liquid separation tank at each compression stage inlet, as well as the compressor auxiliary system. Since only preliminary design documents are available, it is not clear what exactly the compressor auxiliary systems are.
Isn’t the temperature of the motor stator usually 145°?
The exhaust temperature at the compressor outlet is higher than 125 degrees Celsius, the oil pressure is below 0.15 MPa, the temperature of the lubricating oil is above 65 degrees, the temperature of the crankshaft bearings is above 70 degrees, and the temperature set for the motor stator is 135 degrees; an automatic shutdown protection system is in place, with interlocks based on oil pressure and exhaust temperature, and the motor stator features automatic cooling
Open a few, open a few, brothers and the republic
The documentation states that current reciprocating compressors all feature an oil-free design with minimal oil lubrication; therefore, it seems unnecessary to have an interlock system triggered by an oil injector