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    High efficiency heat exchanger with ceramic rotor
    3.
    发明授权
    High efficiency heat exchanger with ceramic rotor 失效
    高效换热器带陶瓷转子

    公开(公告)号：US4040474A

    公开(公告)日：1977-08-09

    申请号：US638831

    申请日：1975-12-08

    申请人： Paul D. Stroom ,  Carl J. Braunreiter

    发明人： Paul D. Stroom ,  Carl J. Braunreiter

    IPC分类号： F28D19/04 ,  F28D19/00

    CPC分类号： F28D19/047 ,  F28D19/041 ,  F28D19/048 ,  Y10S165/02 ,  Y10S277/903

    摘要： An improved regenerative, high temperature gas, high efficiency heat exchanger has a heat absorbing rotor formed of a plurality of gas flow passages and a housing that includes partition columns for dividing the rotor passages into at least one high temperature and at least one low temperature duct. A two section drive shaft supports the rotor in the housing and pressure plates securely connect the rotor to the drive shaft. The rotor is of a size to provide an annular gas bypass channel between the rotor and the housing, which channel is greater than the hydraulic diameter of the rotor flow passages in order that bypass of gas through the channel provides a continual flushing of contaminants therefrom. To prevent leakage between the high and low temperature ducts through this annular channel, air curtains may be employed at the top and bottom of the partition columns. In addition, air curtains may be employed along the length of the partition columns to prevent leakage of contaminants from occurring through the space between the columns and the rotor. SUBACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates in general to high temperature gas, high efficiency regenerative heat exchangers having heat absorbing rotors, and more specifically relates to such exchangers employing a noncontact seal between the rotors and the housings of the exchangers.2. Description of the Prior ArtRegenerative heat exchangers that employ heat absorbing rotors positioned in a housing are well known in the art. The housings of such exchangers typically are formed to provide two separate ducts that ideally are isolated from one another. These heat exchangers have been found to be highly advantageous for use in applications wherein gas at one temperature inside an enclosure is exhausted and gas at another temperature is brought into the enclosure. Through such intake and exhaustion of gas, the heat absorbing rotor is heated or cooled by the gas being exhausted and likewise heats or cools the air being brought into the enclosure.In providing regenerative heat exchangers that have a high efficiency and are adapted to operate with high temperature gases, one of the major areas of concern is the type of seal employed between the exchanger housing and the circumference of the rotor. Heretofore, a majority of those skilled in the art have believed that high efficiency of rotor type heat exchangers was dependent upon the use of mechanical seals between the rotor circumference and the exchanger housing to prevent leakage through the gap therebetween. However, mechanical seals have a major disadvantage in that they include sealing faces that frictionally contact one another, which results in considerable wear and energy required to overcome the friction.In a U.S. Patent to Meijer, No. 3,372,735 issued Mar. 12, 1968, the frictional problem with mechanical seals is pointed out. As a substitute for mechanical sealing, Meijer discloses a regenerative exchanger employing a narrow gap seal between the circumference of the rotor and the exchanger housing. The Meijer reference points out that the gap seal should at most have a width equal to or not more than one half the hydraulic diameter of the rotor gas conducting passages. Because of the narrow width of the Meijer gap seal, the exchanger housing and rotor are described as formed of glass ceramic materials having coefficients of thermal expansion substantially equal to prevent the rotor from becoming jammed in the housing.The heat exchanger of the Meijer reference avoids the frictional problems presented by mechanical seals, but it has been found that narrow gaps between rotors and housings often produce jamming of the rotors with the housings. Such jamming results because of distortion of the rotor and housing due to thermal expansion, deflection of the rotor drive shaft due to the rotor weight or the pressure exerted by gas streams on the rotor, and the collection of foreign materials such as particulates and contaminants in the gap between the rotor and the housing. The Meijer exchanger may not have jamming problems due to distortions because it is formed of low thermal expansion materials and has a relatively small rotor. But in industrial applications wherein relatively large rotors are required, the narrow gaps taught by Meijer are not satisfactory due to the high risk of jamming that they present. Accordingly, the need for a heat exchanger that avoids both the frictional and wear problems of mechanical seals and the jamming problems of gap seals exists.SUMMARY OF THE INVENTIONThe present invention provides a regenerative heat exchanger having a heat absorbing rotor formed of a plurality of parallel gas flow passages, a housing that directs gas into the gas flow passages of the rotor, a drive shaft on which the rotor is mounted by a pair of pressure plates and an annular channel between the housing and the circumference of the rotor that is in a range of from 1-10 times greater in width than the hydraulic diameter of the rotor passages.Due to the width of the annular channel between the outer circumference of the rotor and the housing a significant amount of gas bypasses the rotor by flowing through the channel. However, we have found that such bypass has an insignificant effect on the efficiency of the exchanger and is highly desirable because the channel between the rotor circumference and the exchanger housing is continuously flushed thereby. Therefore, contaminants do not collect in substantial quantities between the rotor circumference and the housing.The rotor of the exchanger is preferably formed of a material having a low coefficient of expansion such as possessed by various ceramics. To provide a strong and durable support for the rotor the exchanger housing and drive shaft upon which the rotor is mounted are formed of preferably high strength metals. Accordingly, the thermal coefficients of expansion of the rotor, housing and shaft all may significantly differ. The relatively large annular channel between the rotor and the housing, thus, substantially eliminates the risk of the rotor binding in the housing as expansion of the housing occurs. To likewise prevent binding of the rotor on its drive shaft, the rotor is mounted thereon by means of a parallel pair of pressure plates that have flat surfaces for engaging the rotor to securely sandwich the rotor in proper position on the shaft but at the same time permit free expansion of the shaft.In a preferred embodiment the housing includes partition members for dividing the flow passages of the rotor into one high temperature duct and one low temperature duct. To provide most complete isolation of the high and low temperature ducts, the housing may include first means for directing pressurized sealing fluid along the length of the partition members to form air curtains between the rotor and such members. Also, second means may be included for directing pressurized streams of sealing fluid at segments of the circumference of the rotor traversing between the partition members to provide an air curtain seal between the high and low temperature ducts at the rotor circumference. Thus, the first and second means insure that little leakage is permitted between gases of the high and low temperature ducts of the exchanger.

    摘要翻译： 改进的再生高温气体，高效率热交换器具有由多个气体流动通道形成的吸热转子和包括用于将转子通道分成至少一个高温和至少一个低温管道的分隔柱的壳体 。 两段驱动轴支撑壳体中的转子，压力板将转子牢固地连接到驱动轴上。 转子的尺寸是在转子和壳体之间提供环形气体旁路通道，该通道大于转子流动通道的液压直径，以便通过通道的气体旁路提供了从其中的污染物的连续冲洗。 为了防止通过这个环形通道在高温和低温管道之间的泄漏，可以在分隔柱的顶部和底部采用气帘。 此外，可以沿分隔柱的长度采用气帘，以防止污染物通过柱和转子之间的空间而发生泄漏。

    Hybrid mounting system for pollution control devices
    4.
    发明授权
    Hybrid mounting system for pollution control devices 失效
    污染控制装置混合式安装系统

    公开(公告)号：US07501099B2

    公开(公告)日：2009-03-10

    申请号：US10652838

    申请日：2003-08-29

    申请人： Stephen M. Sanocki ,  Loyd R. Hornback, III ,  Richard P. Merry ,  Joel H. Sabean ,  Paul D. Stroom

    发明人： Stephen M. Sanocki ,  Loyd R. Hornback, III ,  Richard P. Merry ,  Joel H. Sabean ,  Paul D. Stroom

    IPC分类号： B01D50/00

    CPC分类号： B01D53/9454 ,  F01N3/2853 ,  F01N3/2857 ,  Y02T10/22 ,  Y10S55/30

    摘要： A pollution control device has a metal housing, a solid pollution control device disposed within the metal housing, and a mounting mat disposed between the pollution control element and the housing for positioning the pollution control element and for absorbing mechanical and thermal shock. The mounting mat includes a layer of intumescent material having at least one insert formed of a resilient, flexible, fibrous non-intumescent material. The insert is positioned along at least a portion of at least one lateral edge of the mounting mat to prevent erosion of the intumescent material and to provide a seal between the pollution control element and the housing.

    摘要翻译： 污染控制装置具有金属壳体，设置在金属壳体内的固体污染控制装置，以及设置在污染控制元件和壳体之间的安装垫，用于定位污染控制元件并用于吸收机械和热冲击。 安装垫包括一层膨胀材料，该层具有至少一个由弹性柔性的纤维非膨胀材料形成的插入物。 插入件沿着安装垫的至少一个侧边缘的至少一部分定位，以防止膨胀材料的侵蚀并且在污染控制元件和壳体之间提供密封。