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11. 发明专利

JP2000146105A CIRCULATION FLUIDIZED BED COMBUSTION FURNACE AND METHOD OF PREVENTING WEAR OF EVAPORATION TUBE 失效
公开(公告)号：JP2000146105A
公开(公告)日：2000-05-26
申请号：JP32370398
申请日：1998-11-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： KATAYAMA HIROYUKI , SAITO KEISHIRO , MIYAMOTO MANABU
IPC分类号： F22B1/02 , F22B37/10
摘要： PROBLEM TO BE SOLVED: To reduce the depth of wear of evaporation tubes near the top surface of a lower refractory material in a circulation fluidized bed combustion furnace provided with the lower refractory material at a lower part of a wall surface thereof, on which a plurality of evaporation tubes are arranged. SOLUTION: A plurality of evaporation tubes 2 are arranged on the wall surface of this circulation fluidized bed boiler, and a lower refractory material is provided at a lower part of the wall surface. A nozzle 11 for blowing a gas toward the inside of a furnace is arranged between the adjacent generating tubes 2 above a stage 3' at the top surface part of the lower refractory material. Particles are concentrated on the evaporation tubes near the stage 3' by varying the accumulation height of the particles of fluidizing material by removing the particles accumulated on the stage 3' by a gas blown from the nozzle 11, thereby preventing a reduction in the thickness of the generating tubes 2 at specified points.

12. 发明专利

JPH09248485A MAGNETIC SEPARATION APPARATUS 失效
公开(公告)号：JPH09248485A
公开(公告)日：1997-09-22
申请号：JP5481596
申请日：1996-03-12
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAKAYA JIYUNNOSUKE , KATAYAMA HIROYUKI , MATSUGAMI MANABU , IMATAKE SHIGENORI , KIMURA TAKUYA
IPC分类号： B03C1/26
摘要： PROBLEM TO BE SOLVED: To provide a magnetic separation apparatus capable of enhancing separation efficiency py reducing the effect of an element other than magnetic force and increasing the stagnation time of particles within an internal duct. SOLUTION: In this magnetic separation apparatus passing fine particles consisting of a plurality of components through an internal duct 17 having a magnetic field gradient in its radius direction and separating a specific substance by the difference between the magnetic forces acting on particles of a substance to be separated, a container 1, a multipole magnet 4, a cooling medium container 6, the internal duct 17, multistage fins 18 and a multistage fin support means 19 are provided and the cooling medium container 6 is arranged in the container l so as to be positioned outside the internal duct 17 and the multipole magnet 4 is arranged between the inner and outer cylinders 2,3 of the cooling medium container 6 and the gap between the inner and outer cylinders 2, 3 is filled with a cooling medium Z and the internal duct 17 has the multistage fins 18 therein and each of the multistage fins 18 has a large opening end at the upper part thereof and a small opening and at the lower part thereof.

13. 发明专利

JPH09133316A CIRCULATED FLUIDIZED BED BOILER 失效
公开(公告)号：JPH09133316A
公开(公告)日：1997-05-20
申请号：JP28973795
申请日：1995-11-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： BANDAI SHIGEMI , YAMAUCHI TAKAMASA , KATAYAMA HIROYUKI
IPC分类号： F23C10/00 , F22B1/02 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To make it unnecessary to install a fluidized bed heat exchanger in a seal pot into which fluidized material separated from combustion gas is guided by providing a circulating pipe for part of the combustion gas which has been discharged from a furnace and passed through a group of heat transfer pipes to return to the furnace. SOLUTION: Fuel and air are supplied to a bottom portion of a furnace 1 and are mixed with fluidized material supplied from a seal pot 3 to effect combustion. The fluidized material discharged together with combustion gas from the furnace 1 is separated from the combustion gas in a cyclone 2 before being returned to the furnace 1 via the seal pot 3. The exhaust combustion gas is utilized to produce superheated vapor in a group of the heat transfer pipes 4 before being discharged. Part of the combustion gas temperature of which has been lowered by being allowed to pass through the group of the heat transfer pipes 4 is guided into the furnace 1 through a circulating pipe 5 to be injected into air. By introducing the part of exhaust gas passing through the group of the heat transfer pipes 4 and having a temperature of 100 to 200 deg.C into the furnace 1 through the circulating pipe 5, temperature within the furnace 1 can be controlled at around 800 deg.C without installing a fluidized bed heat exchanger in the seal pot 3.

14. 发明专利

JPH0957151A ELECTRIC PRECIPITATOR FOR GAS TURBINE 失效
公开(公告)号：JPH0957151A
公开(公告)日：1997-03-04
申请号：JP21600595
申请日：1995-08-24
申请人： MITSUBISHI HEAVY IND LTD
发明人： KATAYAMA HIROYUKI , KOJIMA KATSUHISA , ONISHI SHOICHI
IPC分类号： B03C3/40
摘要： PROBLEM TO BE SOLVED: To prevent the lowing of the dust collecting capacity by the passing- through of dust, in an apparatus wherein a plurality of dust collecting units are arranged up and down as well as left and right, by setting the heights of the units to two kinds and differentiating the heights of upstream and downstream dust collecting units. SOLUTION: An upstream dust collecting unit 01 is formed by connecting a lower large unit 1a and an upper small unit 1 while a downstream dust collecting unit 01a is formed by connecting an upper large unit 1a and a lower small unit 1. The air containing dust 7 flowing through a suction duct passes through the dust collecting units 01, 01a to be sent to an air compressor while the dust 7 is removed. At this time, an electrode gap is generated between the units 1, 1a and the dust 7 is passed without being removed and, since the units 1, 1a different in height are arranged on the downstream side, the passed- through air containing dust 7a flows in the downstream unit 1a to certainly remove dust.

15. 发明专利

JPH08215606A WET-TYPE ELECTRIC PRECIPITATOR 失效
公开(公告)号：JPH08215606A
公开(公告)日：1996-08-27
申请号：JP2940195
申请日：1995-02-17
申请人： MITSUBISHI HEAVY IND LTD
发明人： SUZUKI SHIRO , KATAYAMA HIROYUKI , KOJIMA KATSUHISA , ONISHI SHOICHI
IPC分类号： B03C3/16 , B03C3/40 , B03C3/78
摘要： PURPOSE: To apply high voltage and high amperage to electrodes and to improve performance. CONSTITUTION: A wet-type electric precipitator in which particles in a dust space are caught by a dust collecting electrode 14 by applying electric power to a discharge electrode, and the electrode 14 is washed by a spray ejected from a nozzle 28 attached above is equipped with multistage discharge electrodes (an upside discharge electrode 10 and a downside discharge electrode 12) which are divided into many stages in the washing direction and direct current high voltage power sources 16a, 16b, 22a, 22b which apply electric power independently to the upside electrode 10 and the downside electrode 12.

16. 发明专利

JPH07232098A WET ELECTRIC PRECIPITATOR 失效
公开(公告)号：JPH07232098A
公开(公告)日：1995-09-05
申请号：JP2666194
申请日：1994-02-24
申请人： MITSUBISHI HEAVY IND LTD
发明人： MAEKAWA SHIKIAKI , MAEJIMA HIDEYUKI , KATAYAMA HIROYUKI , KOJIMA KATSUHISA
IPC分类号： B03C3/16 , B03C3/41
摘要： PURPOSE:To increase a dust collection rate by providing flat plate-type dust collection electrodes arranged in parallel in a vertical direction, and bar-type discharge electrodes arranged in the center between the dust collection electrodes, with a specified clearance left to a face on which the top and bottom ends of the discharge electrode come in contact with those between the dust collection electrodes. CONSTITUTION:A wet electric precipitation consists of flat plate-type dust collection electrodes 2a arranged parallel to each other in a vertical direction, and bar-type discharge electrodes 3a arranged in the center between the dust collection electrodes 2a with a specified clearance left to a face P on which the top and bottom ends of the bar-type discharge electrode 3a come into contact with the top and bottom ends between the dust collection electrodes. That is, liquid droplets collected by the dust collection electrodes 2a run downward over the surface of the dust collection electrode and drip down from the edge of the dust collection electrode. In this case, from the face P which comes into contact with the top and bottom ends between the dust collection electrodes 2a, i.e., the top end surface and the bottom end surface, the top end and the bottom end of the discharge electrode are arranged, leaving a specified clearance L. Therefore, an attraction from the discharge electrode 3a lessens so that the liquid droplets do not become deformed significantly compared to a conventional dust collector. Thus it is possible to apply a higher collector voltage and consequently, the dust collection rate is enhanced.

17. 发明专利

JPH06343896A ELECTROSTATIC PRECIPITATOR 失效
公开(公告)号：JPH06343896A
公开(公告)日：1994-12-20
申请号：JP13849193
申请日：1993-06-10
申请人： MITSUBISHI HEAVY IND LTD
发明人： KATAYAMA HIROYUKI , KOJIMA KATSUHISA , NAGATA MASAYUKI , KITA TOSHITOMO
IPC分类号： B03C3/16 , B03C3/41 , B03C3/78
摘要： PURPOSE:To avoid a spark by notching the lower end part of a dust collecting electrode from the center toward the corners of the lower end in a downward inclination to enlarge the distance between the droplets of washing liquid falling on the dust collecting electrode and a wire type discharge electrode. CONSTITUTION:In an electrostatic precipitator having plural rectangular dust collecting electrode 1, wire type discharge electrodes 2 coaxially arranged to the rectangular dust collecting electrode 1, and spray nozzles 7 arranged downward above the rectangular dust collecting electrodes, the lower end part of each face (a) of the rectangular dust collecting electrodes 1 is notched from the center toward the corners (b) of the lower end in a downward inclination. Mist collected by the rectangular dust collecting electrodes 1 and washing liquid fall on the surface of the rectangular dust collecting electrodes 1. And after they fall toward the corners of the lower end along the notches at the lower end part, they fall from the corners, turned into droplets. Therefore, since the distance between the falling droplets and the discharge electrodes 2 is made longer, compared to the case the lower part is not notched, a spark is not easily generated, the lowering of charge voltage can be restrained. Thus, higher voltage of the discharge electrodes on washing is used to improve the dust collecting performance.

18. 发明专利

JPH06226041A HIGH-PERFORMANCE FLUE GAS DESULFURIZING METHOD 失效
公开(公告)号：JPH06226041A
公开(公告)日：1994-08-16
申请号：JP1637993
申请日：1993-02-03
申请人： MITSUBISHI HEAVY IND LTD
发明人： HINO MASAO , TATANI ATSUSHI , UGAWA NAOHIKO , KATAYAMA HIROYUKI , IWASHITA KOICHIRO
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77 , B03C3/01 , B03C3/013 , B03C3/16
摘要： PURPOSE:To desulfurize the SOx in waste gases contg. the SOx down to a low-concn. level by installing a wet process electrostatic precipitator to the rear flow part in the outlet of the absorption column of a desulfurizer, spraying a slurry contg. solid calcium carbonate and executing two-stage desulfurization. CONSTITUTION:The waste gases 1 contg. the SOx is introduced to the SOx is introduced into the desulfurizer 2 and the slurry absorbing liquid 4 from a route 3 is sprayed from a route 8 into the desulfurizer 2. The absorbing liquid, then, comes into gas-liquid contact with the waste gases in an absorption section 9 packed with grid and desulfurizes the gases. The waste gases from which the greater part of the SOx is removed are thereafter introduced via a route 14 into the wet process electrostatic precipitator 15. The slurry absorbing liquid contg. solid CaCO3 is sprayed from a route 20 in this precipitator. The slurry absorbing liquid is then attracted to an electrostatic precipitation plate 16 and wet wall parts are formed, by which a precipitation effect and a desulfurization effect are generated. In addition, ion wind is generated on the precipitation plate 16 and the gaseous boundary film of SO2 is diminished. The desulfurization performance is thus improved by the synergistic effect. A part of the absorbing liquid withdrawn therefrom is returned to the desulfurizer 2.

19. 发明专利

JPH0631204A ELECTRIC PRECIPITATOR 失效
公开(公告)号：JPH0631204A
公开(公告)日：1994-02-08
申请号：JP19248292
申请日：1992-07-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAGATA MASAYUKI , MAEJIMA HIDEYUKI , KATAYAMA HIROYUKI
IPC分类号： B03C3/16 , B03C3/36 , B03C3/78 , B03C3/82
摘要： PURPOSE:To provide an electric precipitator generating no pressure rise loss in a duct. CONSTITUTION:The effective cross-sectional area X of the flue gas duct 2 from an absorbing tower 1 to a duct type wet electric precipitator 21 is made the same as the effective cross-sectional area Y of the duct type wet electric precipitator 21. By this constitution, the part causing the generation of pressure rise loss is eliminated and treated gas can be sent by the use of a small-sized blow fan.

20. 发明专利

JPH03232554A ELECTROSTATIC PRECIPITATOR 失效
公开(公告)号：JPH03232554A
公开(公告)日：1991-10-16
申请号：JP2794790
申请日：1990-02-07
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAGATA MASAYUKI , TOMIMATSU KAZUTAKA , KATAYAMA HIROYUKI , KOJIMA KATSUHISA
IPC分类号： B03C3/08 , B03C3/41
摘要： PURPOSE:To make free from maintenance and improve performance by providing aperture part having projections within the plane of planar discharge electrodes provided to face dust collecting electrodes over the entire surface and generating local corona discharges from these projecting parts. CONSTITUTION:The discharge electrodes 3 provided to face the dust collecting electrodes 2 are formed as flat plates and the aperture part 8 having the projections 9 are provided within the plane of the discharge electrodes 3 over the entire surface. The local corona discharges are generated from the projecting parts 9. Namely, the local high current parts provided on the discharge electrodes eliminate the possibility of troubles, such as disconnections, and are maintenance-free. The local high-current parts are distributed uniformly in the electrostatic precipitator so that the improvement in the performance proportional to the capacity of the electrostatic precipitator is possible. Further, the operation of the electrostatic precipitator with at least one unit of a high- voltage power source per unit of the electrostatic precipitator is possible. The wider electrode spacing than with the high-current parts of the conventional two-stage type electrostatic precipitator can be taken and, therefore, the deterioration in the performance by electrode staining is lessened.

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