Discussion on automated quantitative filling of ethylene oxide
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This post was last edited by buddy2w on 2018-11-7 09:51. Quantitative filling of liquefied gas is a well-established process; with only one material flowing in, its procedure is relatively simple. In contrast, the filling of ethylene oxide, which is used for medical sterilization, is more complex, as there is one material entering and one gas stream exiting. At room temperature, ethylene oxide is a colorless gas; at low temperatures, it is a colorless, fluid liquid. It is soluble in water as well as in organic solvents such as ethanol and ether. Molecular weight: 44.05; melting point: -111.3°C; boiling point: 10.7°C; gas density: 1.795 g/L (20°C); relative density (water = 1): 0.87; relative vapor density (air = 1): 1.5; critical pressure: 7.19 MPa; critical temperature: 195.8°C; saturated vapor pressure: 145.91 kPa (20°C); refractive index: 1.3597 (7°C); flash point
May I ask: Where is the most appropriate location to place the gas inlet in a device? Are there any special requests?
The first thing that needs to be addressed is quantification. Does the platform have digital output? If it reaches 210–230 kg, the platform scale will output a signal that can be used to control the feed valve. If it is said to have no output function and is only used for settlement. Then, install a flow meter on the feed line; once the cumulative flow reaches 210–230 kg, an output signal is sent to close the feed valve, and then the weathering valve is closed as well. Of course, there are many other parameters that need to be monitored. Things related to emergency shutdown, such as meteorological pressure, leak alarms, grounding alarms, and so on, are all required. You can consult the manufacturer of the batch controller to have them develop a plan and estimate for you.
The loading station is equipped with a quantitative loading system, which can be provided by DCS manufacturers. Your feeling is a bit similar to that; you can seek some advice.