The gas or vapor being ventilated through the body of this educator is condensed by parallel flow and can be designed for discharge into atmosphere. The Aqua-vactor is particularly useful in cases where small non-condensable loads are involved or when high-pressure (40 psig or greater) steam is unavailable. The motive fluid the Aqua-vactor entrains a gaseous stream simultaneously pumping and condensing it. They can easily handle particulate laden liquid streams that would destroy the internals of a standard pump.Īqua-vactors perform in a similar function but operate on a process gas or vapor instead of process liquid.
Aquaductors are ideal for automatic pumping on sumps or for spill cleanup. For this reason, they are frequently used for mixing two components such as soda ash and water, forming a slurry of any required weight percent soda ash. In addition to boosting the pressure of the suction stream they provide excellent turbulent mixing between the motive and suction streams. It is the most suitable equipment in hazardous areas like steam generation systems, crude oil distillation, thermal power plants, petrochemicals, fertilizers, deodorization of oil, degassing of metal vacuum, etc.Aqua-ductors are designed to use a motive fluid, typically pressurized water, to draw vacuum and instantly entrain other liquids or semi-solids.It can be mounted anywhere on the device. Ejectors usually don’t have space issues due its lightweight and easy handling.Ejector eliminates the chances of fire or explosion as there are no moving parts in it.It helps to provide continuous flow through suction media.Due to the multiple nozzles, it is used to reduce the steam consumption by 9-17 % as compared to the single-stage ejector and thus it is more efficient. In addition to this, the initial cost is high and the evacuation time is very short. On the other hand, multi-stage ejectors give high suction flowrate and generate low noise.It is mainly used to achieve high compression ratios. It is preferred in one set of design condition due to its single nozzle. It is used in critical as well as non-critical flow conditions. Due to their name similarity and with both pumps looking the same, ejector and eductor pumps are often mistaken for one another. Also, the evacuation time is short and the noise generation is high. Difference between ejector and eductor pump. In the case of single-stage ejectors, the suction flow is average and the initial cost is low due to single and compact nozzle.Steam jet ejectors are used, when motive fluid is water. It provides high vacuum level with small flowrate. Steam jet vacuum ejectors can be used to remove the gases and vapor generated during the process and generate vacuum in the reactor (refer the image which has mounted ejector on the vessel).Vacuum jet ejectors used motive fluid as compressed air. In the case of vacuum jet ejectors, due to their static and compact structure, there will be less wear and tear.In this way, waste gas (flare gas) can be recovered and added to the production.įigure 5 : Steam Jet Ejector mounted on Vessel These pumps make use of their structure to transfer energy from one fluid to another via the Venturi effect. As motive fluid flows through a nozzle, it expands at high pressure and reduces the velocity of the fluid. How Does an Eductor (Jet Pump) Work Eductors are a kind of jet-type pump that do not require any moving parts to be able to pump out a liquid or gas. It is accomplished through adiabatic expansion from the supply pressure of the motive fluid to the suction pressure load created in the suction chamber. In general, ejectors convert the pressure energy (potential energy) of the motive fluid to velocity energy (kinetic energy). The design pulls in additional water through - multiplying the amount of water being moved Description Eductor is an especial design of ejectors, shown in Fig AVENTICS - Product Calculation Pneumatics Set the discharge pressure of your air compressor to between 70 and 90psi Set the discharge pressure of your air compressor to between 70 and.Once the motive fluid passed through the nozzle, due to a change in cross sectional flow area (cone shape after nozzle), the compressed fluid slows down and the recovered gas obtained in suction chamber will be discharged with the help of a diffuser (yellow arrow fig 4). During the process, motive fluid is compressed and accelerated.
Afterward, it is passed through the nozzle. Motive fluid is provided through the inlet (yellow arrow in fig.4) of the ejector and the low pressure flare gas from the process vessel or reactor (yellow arrow fig.Motive fluid can be anything that further can be compressed by ejector.
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