Distillation off-gas condenser
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What is an appropriate service life for a distillation off-gas condenser? We use it in two cycles; are there any methods to determine whether the condenser is not performing well enough and thus needs to be replaced?
It can be determined based on the components and amounts of exhaust emissions, or based on factors such as the temperature difference between the inlet and outlet of the heat exchange medium
1. Exhaust outlet sample 2. Pressure difference between exhaust inlet and outlet
It is generally changed every 1–2 days. The criteria for making this decision are: 1. Whether the amount of liquid discharged from the tail pipe increases or if there is liquid flowing out. 2. Fluctuations in system pressure, 3. Exhaust gas sampling for analysis!
1. Good conversion rate, excellent condensation performance in the total condenser, with the material temperature kept below 10 degrees. 2 The two exhaust condensers are used to control the temperature of the primary material at -10 degrees and the temperature of the secondary material at -25 degrees. By paying attention to the above two points, it is generally not necessary to replace the exhaust condenser.
1. Check the feeding situation through the sight glass: 2. Check whether liquid is present in the exhaust gas discharge:
Reply to 1# Zhang Chuang: For the tail cooler, we use a two-main-one-redundant setup. When the material feeding temperature is low, the unit that freezes up severely has to be used, which isn’t very convenient.
Reply to 6# xshlxy: How is the observation effect through the viewfinder?
We reverse the operation of the tail cooling unit based on the exhaust gas sample and the pressure difference between the inlet and outlet of the exhaust gas condenser. Additionally, this reversal must be carried out once a week in order to prepare the unit for use in the collector; if it is used in the collector, the reversal schedule may need to be adjusted again.
It is crucial to monitor in a timely manner whether the emission volume at the exhaust condenser outlet and the vinyl chloride content increase.
The pressure difference between the inlet and outlet of the exhaust gas condenser: if this difference increases, there are two possible reasons: 1. The tubes freeze over, or 2. The discharge pipe freezes. The second scenario may lead to material running incidents. Generally, the pressure difference does not exceed 10 KPa. The second is to check the outlet temperature. Third is to check the VCM content at the outlet of the tail condenser. Make a comprehensive decision on whether it is necessary to switch the tail condenser.