What’s going on with the material flow at the inlet of the ejector?
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I have a jet pump with an air extraction capacity of 500 cubic meters per hour and a slight negative pressure; the flow rate of the medium being pumped is 25 cubic meters per hour. The problem is that the material often flows out through the intake port. What could be the reason for this?
There is a problem with the injector’s structure. Is the central tube damaged or too short?
The pressure at the ejector outlet is unstable; it fluctuates from time to time. When the pressure at the ejector outlet suddenly increases, the liquid drawn in by the ejector is hindered, which results in a decrease in the negative pressure for suction. As a result, the liquid flows back toward the suction inlet. To address this issue, it is advisable to install a check valve at the ejector outlet.
The reason for this operation is a decrease in the flow rate of the spraying medium, or a drop in its pressure; making adjustments in these two areas will be effective. The cause is a clogged injector nozzle or scale buildup in the tail pipe. Additionally: OP, the spraying medium flow rate is 25 cubic meters per hour, while the exhaust volume is 500 cubic meters per hour. With such a high extraction coefficient, is this injector used for urea or desulfurization? Where was this injector designed? Please share that information.
If the material has a low boiling point and high evaporation rate, it can cause the cold air in the condenser to fail to circulate properly. The gas that is not cooled by the condenser gradually cools down as it moves further downstream. Additionally, since there are often some non-condensable gases present in the material, and the flow rate of the ejector is high, this leads to the situation where such gases are drawn downstream. This phenomenon also occurs in my company’s process of distilling dichlorobenzene. You can try installing a buffer tank on the vacuum pipeline; when a certain amount of material accumulates in this tank, it will prevent liquid discharge for a while without affecting the vacuum level. Or appropriately reduce the amount of evaporation.