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    • 3. 发明专利
      SE386082B  未知
    • SE386082B
    • 1976-08-02
    • SE604172
    • 1972-05-08
    • MASUDA S
    • MASUDA S
    • B03C3/40 , B03C3/88 , B03C7/02 , B05B5/08 , H01T19/04 , B03C3/06 , B03C3/66
    • 1381783 Electrostatic separators S MASUDA 26 April 1972 [12 May 1971 31 May 1971] 19312/72 Heading B2J [Also in Divisions B8 and H2] An electrostatic dust precipitator comprises a.c. energised electrodes associated with a layer of dielectric material so that when dust laden gas is directed on to the dielectric layer, the dust particles become charged and are then repelled by the electric field set up by the electrodes. The embodiment shown in Fig. 7 includes two porous dielectric cylinders 86, 87 associated with electrodes 88, 89 and 90, 91. The gas passes through the cylinders and leaves by outlet 96. The dust is repelled from the inner surfaces of the cylinders by the electric fields and falls under the force of gravity into a hopper 85. If the electrodes are connected to a polyphase supply Fig. 8 (not shown), a downwardly moving electric field assists the force of gravity. The electrodes may be connected alternately to a d.c. supply and an a.c. supply, Fig. 10 (not shown), the d.c. fields causing the particles to adhere to the inner surfaces of the dielectric cylinders and the a.c. fields causing the dust to fall into the hopper as in the Fig. 7 embodiment. The precipitator may include a single dielectric cylinder, Fig. 9 (not shown) having electrodes on its inner and outer surfaces, a d.c. field being set up between the a.c. energised inner and outer electrodes to prevent the passage of fine dust particles through the porous cylinder. In a modification of the Fig. 7 embodiment, (Fig. 10), the cylinders are formed of electrically insulated, spirally wound electrodes placed in contact with one another so that the insulation on the electrodes forms the dielectric layer. The gas passes through the interstices between adjacent insulated electrodes and the dust falls into a hopper as in Fig. 7. In a further embodiment, Fig. 12 (not shown), a single cylinder is formed of hollow insulating tubes spirally wound and in contact with one another. The electrodes are formed as a layer of conductive paint on the inner surfaces of the tubes and fluid is passed through the tubes so that when the dust laden gas is hot, the apparatus functions as a dust precipitator and heat exchanger. All of the above embodiments may employ corona discharge electrodes such as 99, 99', Fig. 7. In a further embodiment, Fig. 13, dust laden gas enters at 95 and leaves at 96 after passing over two sets of dielectric plates 191, 192 in which are embedded electrodes 201-212 and 221-225 and which are associated with corona discharge electrodes such as 193. The electrodes in the dielectric plates are connected alternately to earth, which causes the dust to adhere to the dielectric plates, and to an a.c. supply, which causes the dust to fall into hoppers 85, 85' as in the Fig. 7 embodiment: A further embodiment, Figs. 20, 21 (not shown) includes plates of woven material, the electrodes being included in the weave or being fixed to the woven plate.
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