Have you understood the barrier treatment setting of vacuum unit? Many people may not know what the vacuum unit is used for, so today I will tell you in detail how to set the barrier treatment of the vacuum unit, hoping to help you. 1. First of all, we should see if our homework is normal; Whether the vacuum system of the vacuum unit has leakage points, and check whether the vacuum system pipeline and the continuous vent pipeline of the low-pressure heater are damaged, whether the vacuum damage valve is tightly blocked, whether the sealing water is normal, and whether the steam supply pressure of the shaft seal is normal; 2. Check whether the shaft seal steam inlet valve, diverter valve and load relief valve are normal, whether the shaft water seal is normal, whether the shaft heater fan is defective or the shaft heater negative pressure is low, start the standby fan, check whether the small turbine exhaust system is normal, start the electric pump, stop the small turbine and block the exhaust butterfly valve if necessary; 3. Check whether the sealing water of the vacuum unit is normal and whether the condensate pump is empty; 4. Whether the water level of condenser is too high; 5. When the condenser vacuum drops to - 87kpa, the standby vacuum pump will start automatically, otherwise it will be put into operation manually. If the vacuum continues to drop, the load shall be reduced at the end; The vacuum of the vacuum unit drops to - 84kpa and the load is reduced to zero; 6. If the vacuum drops to - 81kpa, measures shall be taken for tripping maintenance, otherwise, switch off and shut down manually. Through the introduction of the knowledge of vacuum unit barrier treatment, it can be seen that most of the barrier treatment is due to the abnormal operation of the unit, so we should check one by one according to the above introduction, find out the problem and solve it according to the correct method, so as to effectively reduce the loss.