High-pressure coal slurry pump

Of course, an assessment is needed first. First, check whether all three flow rates are decreasing simultaneously; if they do, the pressure in the gasification furnace should also drop. In such a case, there is likely a problem with the slurry pump, and it’s necessary to increase its speed and reduce oxygen supply to prevent excess oxygen. If time is not available, the pump should be stopped immediately. Prevent explosions in peroxide carbon scrubber towers. Second, if it is found that one of the three flow rates has decreased while the vaporization pressure does not decrease, have the personnel on site check whether there is a problem with the pump to determine if it is indeed a pump issue. If not, it should be assumed that it is fake flow data, and the instrumentation staff should be called to fix it. Remember to remove the flow interlock.

Check whether the inlet and outlet pressures of the pump (as shown on the control panel and at the site) are normal, and determine if there is any blockage in the inlet or outlet pipelines. Verify that the readings from the flow meter correspond to the pump’s rotation speed, ensure that the pressure of the driving fluid is normal, and inspect the slurry pipelines for any leaks. Reduce the load on the pump via the control panel, investigate the cause; if it is a problem with the pump, it should be stopped immediately

If the slurry flow rate decreases (but no trip occurs), how should the operators proceed?

First, you need to determine whether it is the flow meter that is showing fluctuations or the slurry pump that isn’t delivering the required flow. If the slurry pump isn’t delivering enough flow, increase its speed; check on site to see if there is still no flow, and tap on the check valves at the inlet and outlet. If the flow still doesn’t increase even after increasing the pump’s speed, then another solution must be sought

Rule out the possibility of false readings from the instruments, and check whether the inlet and outlet pressures, the pressure of the propulsion fluid, the pump speed, and the oil pressure at the drive end are within normal ranges. Conduct on-site inspections to identify any issues, such as the condition of the main motor, its noise level, pressure, oil level, any leaks in the propulsion fluid or coal slurry pipelines, and whether there are any alarms on the control panel. If the problem lies with the pump, it must be stopped; protecting the pump is the best course of action! Those that can handle it can also operate at reduced load depending on the circumstances. We have encountered situations where the propellant fluid leaked, but prompt action was taken to prevent losses. [This post was last edited by liwei909 on 2009-4-1 at 12:56]

1. First, determine whether the flow rate is continuously decreasing or if there are any fluctuations； 2. If the decline does not continue, first check whether the frequency converter is functioning properly; if it is not, adjust the frequency converter to ensure normal operation ； 3. If the frequency conversion is working properly, notify the site to check whether the pressure at the outlet of the slurry pump is normal. If a low pressure is detected, examine the thrust oil system (including oil pressure, oil volume, the automatic oil filling and drainage system, the operation of each cylinder, and the operation of the diaphragm) for any abnormalities. If abnormalities are found, take appropriate action based on those findings ； If the problem is serious, prepare to stop the vehicle for repairs ； 4. Notify the site personnel and the instrument technicians to check whether the electromagnetic flowmeter is operating properly; if there are any abnormalities, prepare to shut down the equipment for maintenance ； 5. If all the above assumptions are correct, it is likely that there is a blockage in the inlet or outlet valve. Notify the personnel on site to confirm this, and then gently tap the valve until normal operation is restored ； 6. If the flow rate fluctuates, notify the site to check whether the outlet pressure regulator is functioning properly ； 7. As a control operator, the most important thing in such situations is to maintain the proper oxygen-to-coal ratio; this depends primarily on the reliability of your oxygen-to-coal ratio control system. Make sure there isn’t an excess of oxygen, and keep a close eye on the furnace temperature ； 8. Notify the site to carefully inspect all drain lines and slurry circulation pipelines for any leaks; such leaks are likely to be minor and difficult to detect, so careful attention is essential. In short: The occurrence of this phenomenon is mainly addressed through on-site inspections and troubleshooting; the only thing the control room can do is to monitor the furnace temperature, the oxygen flow rate, and the oxygen-coal ratio. If the problem worsens, it is necessary to prepare for shutting down the system promptly. This post was last edited by 419423903 on 2009-4-1 02:12]