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Compressible gas ejector with unexpanded motive gas-load gas interfaceRelated Patent Categories: Pumps, One Fluid Pumped By Contact Or Entrainment With Another, JetCompressible gas ejector with unexpanded motive gas-load gas interface description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070025862, Compressible gas ejector with unexpanded motive gas-load gas interface. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] Not applicable. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not applicable. REFERENCE TO A "SEQUENCE LISTING" [0003] Not applicable. BACKGROUND OF THE INVENTION [0004] 1. Field of the Invention [0005] The present invention relates to ejectors, and more particularly to a compressible gas ejector having an unexpanded motive gas exposed to a load gas, wherein the interface of the unexpanded motive gas and the load gas can be located in a suction chamber or a downstream diffuser. [0006] 2. Description of Related Art [0007] Steam jet ejectors are employed in the chemical process industries, refineries as well as power generation plants, stills, vacuum deaerator evaporators, crystallizers, steam vacuum refrigeration, flack coolers, condensers, vacuum pan dryers, dehydrators, vacuum impregnators, freeze dryers and vacuum filters. The ejector provides a vacuum that can be applied, depending upon the design of the ejector, from relatively small loads to significant loads. Ejectors can also be used to evacuate air and/or combustion products in aerodynamic and combustion processes. [0008] Ejectors can also be used to provide the vacuum (pressure below atmospheric) for the production of natural fats and oils and derivative oleochemicals. In addition, degumming, bleaching, interestification, fractionation, winterization and deodorization are often supported by ejectors. [0009] As seen in FIG. 1, a prior art ejector includes a motive venturi, a suction chamber and a downstream diffuser. The motive venturi includes a converging section, a throat and a diverging section, wherein the suction chamber encompasses (and is thus fluidly exposed to) the open diverging end of the motive venturi. The suction chamber is fluidly exposed to a suction inlet and hence to a load gas and the diffuser. The diffuser is also a venturi and includes a converging section beginning in the suction chamber, a throat and a diverging section. [0010] Generally, the ejector converts pressure energy, for example, a motive stream, into kinetic energy (velocity). Referring to FIG. 1, prior art steam ejectors 1 obtain the desired by velocity by the adiabatic expansion of the motive steam through a convergent and divergent section of the motive venture 3. As seen in FIG. 1, the velocity of the motive steam continually increases as the motive steam passes along the divergent section of the motive venturi. The motive steam is typically expanded to the pressure of the load gas. The high velocity motive steam then passes into a suction chamber 5. The resulting high velocity, motive steam is then retarded in the suction chambers while the load steam is accelerated in the suction chamber and forms a mixture. [0011] The mixture passes through the converging section, the throat and the diverging section of a diffuser 7, wherein the high velocity is converted back into pressure. Thus, the mixture can be vented to atmospheric pressure, or additional ejectors can be employed to sufficiently raise the pressure to atmospheric pressure. [0012] In certain applications, it is advantageous for the ejector to remove a certain ratio of motive gas to load gas. Historically, in sub critical flows, the ejectors are only able to provide a motive mass flow to load mass flow ratio of approximately 2.0. However, certain applications can be provided with increased efficiency, if the ratio of motive mass flow to load mass flow is on the order of 1.5. Therefore, the need exists for a compressible gas ejector that can reduce the ratio of motive gas mass flow to load gas mass flow. BRIEF SUMMARY OF THE INVENTION [0013] The present ejector provides a compressible gas ejector with an improved motive gas mass flow to load mass gas flow ratio. [0014] In one configuration, the present compressible gas ejector provides for the direct contact of unexpanded motive gas with the load gas. Depending upon the particular construction, the interface between the unexpanded motive gas and the load gas can be located in the suction chamber or a converging section of the diffuser. [0015] Contrary to prior teachings which suggest detrimental instability upon exposing unexpanded motive flow in the suction chamber, the present configuration provides stable mass flow rates, with the unexpanded motive gas directly mixing with the load gas. [0016] In a further configuration, the compressible gas ejector, includes a converging motive funnel, the motive funnel having a converging section being substantially free of a downstream diverging section; a suction chamber fluidly connected to the motive funnel; and a diffuser downstream of the suction chamber, the diffuser including a converging section and a downstream diverging section. In one configuration, a downstream end of the motive funnel is disposed within the converging section of the diffuser. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S) [0017] FIG. 1 is a cross-sectional view of a prior art steam ejector. [0018] FIG. 2 is a cross-sectional view of the present ejector. Continue reading about Compressible gas ejector with unexpanded motive gas-load gas interface... Full patent description for Compressible gas ejector with unexpanded motive gas-load gas interface Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Compressible gas ejector with unexpanded motive gas-load gas interface patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Compressible gas ejector with unexpanded motive gas-load gas interface or other areas of interest. ### Previous Patent Application: Electromagnetic pump driving method Next Patent Application: Automatic inlet check valve release Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Compressible gas ejector with unexpanded motive gas-load gas interface patent info. 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