Water ring vacuum pump technical transformation of the specific steps and instructions 1, water ring vacuum pump mechanical transformation part of the modified intake pipe to know than the original pump group pipe length of about 700mm, the increase in parts has been marked on the map, If the position is not enough, the pipeline valve on the pipeline can be changed to vertical, so there is room to cut off the 700mm pipeline. 2, the pump control part of the change to increase the pressure switch 47a (double contacts 47a1, 47a2) its role is used to control the intake tee and ejector tee connection pneumatic butterfly valve (16b) and the injector pneumatic butterfly valve 19a) on and off, thereby controlling the injector into and out. 2.1 When a main pump is running, when the pressure measured by the pressure switch is less than 10kPa (specifically, it can be set), the atmosphere ejector switching valve [16b] is closed and the atmospheric ejector drives the gas valve [19a] After a valve action is completed, the atmosphere injector is put into the state. 2.2 When a main pump is running, the pressure switch [47a2] measured pressure greater than 14Kpa (this value can be set by yourself), the atmosphere ejector driven gas valve [19a] is closed, while the atmosphere ejector switching valve [16b] Open, when the above two valve action is completed, the atmosphere ejector is in an exit state. 3, the original unit pressure switch and pressure switch settings do not need to change. 4, water ring vacuum pump after the transformation of the advantages and transformation before and after the performance and economic comparison 4.1, after the transformation of the advantages: â‘ most important to ensure that the vacuum pump does not occur cavitation, noise and vibration will be substantially reduced, the vacuum pump The service life will be improved. Since the retrofit of No.3 A vacuum pump has greatly reduced the noise and vibration since the installation of atmospheric ejector in August 2008, it has never seen the rupture of the impeller and excessive vibration damaging the thermal control equipment. â‘¡ Because of the tightness of the condenser of this unit, the pumping performance of the pump equipped with atmospheric ejector in the high vacuum stage is better than that of the single pump, meanwhile, the condenser vacuum is always maintained at the ideal level of 5-6Kpa, Improve the unit with the load rate to create a good condition. 4.2, before and after the transformation of the performance, economic contrast â‘ installed before the atmospheric ejector, the vacuum within the vacuum pump to maintain about 6Kpa, after the installation of atmospheric ejector, the vacuum within the vacuum pump to maintain about 12Kpa, vacuum pump power curve reference, at 12Kpa , The shaft power of 113KW, as the condenser vacuum is constantly changing, so the vacuum pump vacuum evacuation is also changing, it can not be very specific about how much the shaft power increase, the general we press 6Kpa (power is 99KW ) And 12Kpa (power is 113KW), which means that after the installation of the air ejector its power will increase about 14KW. (2) After the installation of the air ejector, the pumping performance of the water ring vacuum pump is improved. According to our observation and DCS PC history curve, the condenser condenser vacuum is more stable and the vacuum energy can be increased compared with the original condition 1Kpa or so, and there is a trend towards higher vacuum.