Operation of the ethylene oxide pump
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When using an ethylene oxide pump, it involves filling the pump and draining it for maintenance. However, ethylene oxide must be mixed with 24 times its volume of water in order to be discharged; so how are these operations carried out in practice? How should the inlet and outlet pipes of the pump be configured to achieve this? Experts with experience in operation and design can provide guidance
Why must it be mixed with 24 times its volume of water to be discharged? Rinsing with flowing water is sufficient, followed by drying through nitrogen purging.
It seems that ethylene oxide can be recovered using chilled water.
If you are doing this solely for the purpose of maintaining the pump, the specific procedure is as follows: First, isolate the pump’s inlet and outlet ports and install blind flanges. Then, use deionized water – it must be deionized water – to flush the entire system by introducing it through the pump’s built-in drainage channels and the inlet valve. The fluid should be drained into the epoxy dilution tank via hoses connected to these drainage channels; remember that the hoses must be submerged below the surface of the dilution tank. Rinse repeatedly, then replace with low-pressure nitrogen for 24 hours of purging; after the analysis shows satisfactory results, disassemble and inspect the pump, ensuring proper personal protection throughout the process. :)
In simple terms, it takes advantage of the high solubility of ethylene oxide in low-temperature refrigerants. A chemical manufacturer previously implemented such a system: they developed a recovery system for waste gases that could only be burned in regenerative furnaces, using a five-tank three-way process, and ultimately managed to recover the ethylene oxide. A budget and technical plan have been prepared; the investment amounts to 12 million, with the investment recovered within one and a half years. After deducting the maintenance costs, what remains is additional profit. The key is to do a good job in control; advance funding was required, and in the end the bid was won by an engineering company based in Chengdu, which still carried out the construction according to our technical plan. Annoying. In the end, as compensation, we built an aeration tank worth hundreds of thousands of yuan, still at our own expense. Then I stopped thinking about it and focused on the equipment.