How to optimize the performance of your vacuum system? Vacuum pump troubleshooting and having a safe, reliable and built-in vacuum system is essential to meet your operational needs. But some vacuum systems do not always behave as they should. Slow discharge time, poor final pressure, poor condition, troublesome pumps…
There are several factors that can affect the performance of your vacuum system
But how can your vacuum system Troubleshoot, and most importantly, how can you fix the underlying problems?
This problem usually involves hard deposits in the throat of the weaker ejector steam nozzle. Do this to prevent the steam nozzle from becoming weaker on the process side.
You can check the following for troubleshooting your vacuum pump and vacuum systems: Reasons for slow discharge time How to Increasing the final pressure of the vacuum pump How to deal with problematic vacuum pumps and gauges How to deal with environmental conditions such as temperature, magnetic fields and ionizing radiation Vacuum pump and vacuum systems troubleshooting Vacuum pump troubleshooting of vacuum systems in refinery vacuum towers The purpose of setting up a refinery vacuum tower is usually to produce asphalt with suitable viscosity or to minimize the residual content of heavy vacuum residual virgin gas fed to delayed coke feed or furnace oil. Ati goes. In many cases, the ability to achieve these goals is the biggest factor in determining a refinery's profitability. Basically, the main goal of the refinery operator is to restore the damaged vacuum in the flash area of the vacuum tower. History The following is a problem that occurs at many refineries, if not most refineries, at the beginning of each summer. The problem is that both the ambient air temperature and the plant cooling water temperature rise. This leads to a jumper wave of the first stage, a reduction in the step change in the vacuum, and the instability of the vacuum tower pressure. The United States, which produced the rest of the cocker vacuum, delayed the first phase ejector on most afternoons starting in July and continued until late in the afternoon when ambient temperatures dropped. Analysis of the gas released from the ejector of the third stage, a high concentration of both ISO and source, is loaded. That is, in feeding the vacuum tower from the floor of the towers of the raw atmosphere.
The recovery of light naphtha in the raw tower from the remnants of the atmosphere was apparently poor. It was also cool when the pump returned. It was not able to suppress the high temperature of the vacuum tower enough to compress the pristine pentans and hexanes to prevent the first stage ejector from overloading. However, at higher ambient temperatures, the trim pump air cooler
Colder air to improve the flow problem, we improved the cooling performance with the following: Slip the sliding fan belt increase step Fan blade; Add water mist nozzles for humidification,
to solve the problem of flow, cooling function and air cooling to the pipe package (we did not spray water on the pipes themselves)
and Brush the bottom of the pipes. The addition of water mist nozzles should be minimized because wetting the pipes actually causes the fins to corrode. Adding blade seals to reduce air circulation
This measurement was only used if needed for several hours on rainy days.
Note that the main problem, Which has not yet been modified by the refinery, the trapping efficiency is poor in the lower six trays of the raw atmospheric tower.
The trays are most likely in poor condition because the pressure drop observed in the trays is very small.
Expressor outlet pressure of the first stage is high In the raw unit of 35,000 barrels per day, the viscosity profile for the pavement product of about 10,000 barrels per day can not be achieved. The problem was again the reduction of the step change in the vacuum during periods of increasing cooling water temperature.
Hence, this problem continued even at night when the ambient temperature decreased. Cooling water was taken from a local river.
. 20 mm Hg was designed above the critical discharge pressure
Increasing the pressure in the first stage jet discharge causes the P1 field pressure study to show that the pressure in the jet loses its "sound amplification".
On the other method, the jet loses part of its compression ratio due to derailment due to excessive back pressure.
.
To correct this problem, through a trial and error method, we found that the reduction of the actuator vapor pressure to the second stage jet,
at the first stage jet discharge pressure P1
Psig from 180
psig 140 to
wrapped around the steam nozzle wires, which may delay the galvanic corrosion rate.
Samples There are many other problems with the vacuum system in both vacuum towers and dense turbine surface condensers. We have seen the vacuum systems of refinery and petrochemical ejectors.
The general lesson we have learned is that the conventional descriptions in Moore Convergent-divergent steam ejectors do not always correspond to the actual performance of vacuum tower ejectors.
This is based on the external temperature observed along the jet. External problems with ejectors and steam nozzles are ejectors.
Sludge drum sludge This problem at a Wyoming plant involves the accumulation of sludge when the drum seals the bottom of the sealing bases. Cover.
Then condensate ...
