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1. 发明专利

JPH11147047A METHOD AND APPARATUS FOR CONTROLLING ROLLER MILL 失效
公开(公告)号：JPH11147047A
公开(公告)日：1999-06-02
申请号：JP31543497
申请日：1997-11-17
申请人： BABCOCK HITACHI KK
发明人： SATOU KAZUNORI , MEGURI NOBUYASU , SHOJI KAZUNORI , NISHIDA HIDEKAZU , HASEGAWA TADASHI , TATSUMA TERUAKI , KANEMOTO HIROAKI , TANIMOTO KAZUNORI
IPC分类号： B02C15/04 , B02C25/00
摘要： PROBLEM TO BE SOLVED: To avoid self-exitated vibration by a method in which in an apparatus for crushing a raw material by crushing rollers, the supply of the raw material, after being made excess temporarily at the start of the supply, is reduced, and a crushing load is set up low at the start of the supply of the raw material, and the crushing load is increased with the passage of time. SOLUTION: A crushing raw material 5 supplied from a raw material supply pipe 4 to the center of a rotary table 2 is moved to the periphery of the table 2 by centrifugal force to be crushed between a crushing lace 6 and a crushing roller 3. A crushed powder and granular material are dried while being lifted in a housing 1 by hot air 7 from an air throat. In order to avoid self-excited vibration generated with the actuation and stop of a roller mill, a quantitative overshoot is implemented temporarily simultaneously with the start of the supply of the crushed raw material 5. Next, the supply of the raw material, after being reduced close to a lower limit, is elevated again. The crushing load is set up low at the start of the supply of the crushed raw material 5 and increased again corresponding to the amount of the supplied raw material.

2. 发明专利

JPH09239284A ROLLER MILL 失效
公开(公告)号：JPH09239284A
公开(公告)日：1997-09-16
申请号：JP5321496
申请日：1996-03-11
申请人： BABCOCK HITACHI KK
发明人： SATOU KAZUNORI , KANEMOTO HIROAKI , MEGURI NOBUYASU , SHOJI KAZUNORI , MITSUI HIDEO
IPC分类号： B02C15/04 , B02C25/00
摘要： PROBLEM TO BE SOLVED: To control the generation of a self-oscillation in spite of the long-term use by providing a pivot in such a way that it is transferable to the fine powder discharging side of crushing rollers in a device designed for finly crushing a feedstock by the interlocked operation of the crushing rollers and a rotary table of a nearly disc shape. SOLUTION: This roller mill is equipped with a rotary table of an almost disc shape and plural tire-shaped crushing rollers 1. In addition, roller pivots 3 which work as fulcrums for the pendulum action of the crushing rollers 1, are provided on the top of a roller bracket 2 installed on the crushing rollers 1. In this case, to make it possible to support the crushing rollers 1 substantially in a toe-in state by moving the positions of the roller pivots 3 to the fine powder producing side, the roller pivots 3, held from the right/left using plural pivot spacers 21 of a semidisc shape, are mounted in an upper and a lower pivot blocks 4a, 4b. Thus, the positions of the roller pivots 3 are changed by selecting the number of pivot spacers 21.

3. 发明专利

JP2534022B2 失效
公开(公告)号：JP2534022B2
公开(公告)日：1996-09-11
申请号：JP100594
申请日：1994-01-10
申请人： BABCOCK HITACHI KK
发明人： SHOJI KAZUNORI , MEGURI NOBUYASU
IPC分类号： C10L1/32 , C10L10/18

4. 发明专利

JPH08155317A ROLLER MILL 失效
公开(公告)号：JPH08155317A
公开(公告)日：1996-06-18
申请号：JP29962794
申请日：1994-12-02
申请人： BABCOCK HITACHI KK
发明人： SATOU KAZUNORI , MEGURI NOBUYASU , SHOJI KAZUNORI , KANEMOTO HIROAKI , YUASA HIROSHI
IPC分类号： B02C15/04
摘要： PURPOSE: To prevent self-exciting vibration of a roller mill by constituting at least one of a pulverizing roller and a pulverizing ring of plural segments, and differentiating pressing contact lines from each other every segment. CONSTITUTION: Pulverizing rollers 4 are rolled on a compressed powder bed on a pulverizing race 17 of a pulverizing ring 5. In this case, the pulverizing roller 4 is constituted of plural segments 21a, and in any segment 21a, a pressing contact line 20a is inclined against a conventional pressing contact line. And the inclined angles of pressing contact lines 20a are differentiated from each other every roller segment 21a. A pressing contact start point and a pressing contact finish point shown as both the ends of the pressing contact line 20a do not coincide with each other. Therefore, by mutual cancel action of plural pulverizing rollers, the generation of severe self-exciting vibration in which a roller mill is synchronously moved is damped to restrain it to a level of faint forced vibration.

5. 发明专利

JPH06277542A VERTICAL ROLLER MILL 失效
公开(公告)号：JPH06277542A
公开(公告)日：1994-10-04
申请号：JP7031993
申请日：1993-03-29
申请人： BABCOCK HITACHI KK
发明人： SATOU KAZUNORI , MEGURI NOBUYASU , SHOJI KAZUNORI , KANEMOTO HIROAKI , YUASA HIROSHI
IPC分类号： B02C15/04
摘要： PURPOSE:To prevent the generation of large self-excited vibration due to the synchronization of vibration of pulverizing rollers with each other in a vertical roller mill. CONSTITUTION:In a vertical roller mill where a turntable 3 which is rotatably supported in a housing 21 and which has a pulverizing surface 15 in the shape of a groove along the outer periphery of the upper surface, and plural pulverizing rollers 4 which are arranged on the pulverizing surface of the turntable in a state of pressurized contact with the turntable at prescribed intervals along the circumferential direction are provided, a weir body 13 is provided along the outer periphery of the turntable and the weir body is divided in the circumferential direction. The division cycle is made irregular in the circumferential direction or the height of the weir body 13 is changed along the circumferential direction. Consequently large self-excited vibration due to the synchronization of the pulverizing rollers is prevented to improve durability of the whole equipment.

6. 发明专利

JPH06192669A EQUIPMENT FOR PRODUCTION OF CWM 失效
公开(公告)号：JPH06192669A
公开(公告)日：1994-07-12
申请号：JP34566392
申请日：1992-12-25
申请人： BABCOCK HITACHI KK
发明人： SHIMA TOSHINOBU , KODA FUMIO , SHOJI KAZUNORI , TAKAHASHI YOSHITAKA , KAWANO TAKASHI
IPC分类号： B02C17/00 , B02C17/04 , B02C25/00 , C10L1/32
摘要： PURPOSE:To prevent the stoppage of the coal feed system with a solid fuel (feed coal) due to the reverse flow of steam, to make the continuous production of a CWM slurry possible, and to improve the reliability of the equipment. CONSTITUTION:In order to prevent the reverse flow of steam during the stop of a mill 6, an automatic opening and shutting gate 12 is interlocked with the state of running of the mill 6, and the gate 12 shuts when the mill 6 is stopped to thereby shut out the steam generated by the heat of grinding of the feed coal, which has been a defect of a wet mill, and to prevent a chute 15 from being stopped with the feed stock solidified with the steam. Further, a feed water branch pipe 13 through which feed water is introduced into the upstream of the gate 12 having the possibility of stoppage during the running of the mill 6. An opening and shutting valve 16 which opens during the running of the mill 6 and shuts during the stop of the mill 6 is provided so as to utilize the feed water which inherently needs to be always supplied to the mill 6 during its running as washing water for the prevention of the stoppage of the chute 15 simultaneously with the start of the running of the mill 6.

7. 发明专利

JPH06142424A VAPOR/LIQUID SEPARATOR 失效
公开(公告)号：JPH06142424A
公开(公告)日：1994-05-24
申请号：JP30216692
申请日：1992-11-12
申请人： BABCOCK HITACHI KK
发明人： IMADA NORIYUKI , SHOJI KAZUNORI
IPC分类号： B01D45/12 , F22B37/26
摘要： PURPOSE:To provide a vapor/liquid separator whose separating performance is not lowered even when inflow velocity is increased by miniaturization or an increase in throughput. CONSTITUTION:In this vapor/liquid separator consisting of a shell 9, an inflow pipe 10, an upper outlet pipe 11 and a lower outlet pipe 12. projections 13 for preventing the rise of liquid film are provided between the inflow pipe 10 and the upper outlet pipe 11 in the circumferential direction of the inner wall of the shell. Particularly it is preferable that the projections 13 are constituted so that they may be in the spiral form in the reverse direction to that of the turning flow generated by an installing angle of the inflow pipe 10.

8. 发明专利

JPH05337386A 失效
公开(公告)号：JPH05337386A
公开(公告)日：1993-12-21
申请号：JP14586092
申请日：1992-06-05
申请人： BABCOCK HITACHI KK
发明人： SATOU KAZUNORI , MEGURI NOBUYASU , SHOJI KAZUNORI , KANEMOTO HIROAKI , TAOKA YOSHINORI , HASEGAWA TADASHI
IPC分类号： B02C15/00 , B02C15/04
摘要： PURPOSE:To prevent that grinding rollers are synchronously subjected oscillation motion or up-and-down vibration motion by providing projections irregularly different in height to the outer periphery of a turntable and providing cavities changed in number or arrangement at every rollers to the outer peripheral surfaces of the rollers to mutually cancel the oscillation motions of the rollers. CONSTITUTION:In a roller mill having a turntable 3 rotating around a vertical shaft on a horizontal plane having a plurality of ring segments 14 provided thereto on the circumferential side thereof and a plurality of grinding rollers 4 rotated in the state pressed to the peripheral upper surfaces of the sigments 14 and finely grinding a solid raw material under pressure, a plurality of cavities 12 are provided to the circumferential parts on the side of a mill housing 18 of the grinding surfaces of the rollers 4 so as to be made different in number or in the arrangement on the circumferences of the rollers 4 at every rollers 4. Further, the projections 16 having shapes gently connected to the grinding races 15 provided to the upper surfaces of the segments 14 are provided to the outer peripheral parts of the ring segments 14 and arranged so that the shapes of the projections 16 are made different at every segments 14.

9. 发明专利

JPH05220416A VERTICAL MILL AND OPERATION THEREOF 失效
公开(公告)号：JPH05220416A
公开(公告)日：1993-08-31
申请号：JP2381292
申请日：1992-02-10
申请人： BABCOCK HITACHI KK
发明人： MEGURI NOBUYASU , SHOJI KAZUNORI , SATOU KAZUNORI , TAOKA YOSHINORI
IPC分类号： B02C15/00 , B07B7/083
摘要： PURPOSE:To largely lower the min. load of a boiler, to utilize coal of a high fuel ratio and to produce powdered coal having wide particle size distribution by providing a definite distance between the top plate of a housing and the upper end of a rotary blade and providing an up-and-down movable adjusting cylinder from the top plate of the housing inside or outside the rotary blade. CONSTITUTION:In a vertical mill, by raising the lower end of an adjusting cylinder 15 above the upper end of a rotary blade 14, a part of particles circulating within the mill is discharged to the outside from a discharge pipe through the gap between the lower end of the adjusting cylinder 15 and the upper end of the rotary blade 14 even when the particles are rougher than the classification point in a classifier 13. The particles circulating within the mill are ground until they become finer particles because the classification point in the classifier becomes small by raising the number of rotations of the classifier 13. By this constitution, powdered coal with wide particle size distribution containing fine particles can be produced and stable combustion is achieved at the time of the min. load of a boiler or even in a boiler using coal inferior to combustion properties.

10. 发明专利

JPH05156267A METHOD FOR OPERATING PNEUMATIC BED GASIFIER 失效
公开(公告)号：JPH05156267A
公开(公告)日：1993-06-22
申请号：JP32570691
申请日：1991-12-10
申请人： BABCOCK HITACHI KK
发明人： UEDA AKIO , SHOJI KAZUNORI , KIDA EIJI , KOYAMA SHUNTARO
IPC分类号： C10J3/46
摘要： PURPOSE:To gasify a carbon raw material at a high gasification ratio by feeding the raw material and an oxidizing agent to a gasifying furnace at a specific temperature, branching the oxidizing agent from the same controlling means to the first burner group and the second burner and refeeding the scattered unburned material. CONSTITUTION:A fine particulate solid raw material and an oxidizing agent such as oxygen or air are fed into a gasifying chamber 65 kept above the melting temperature of ash produced from the fine particulate raw material. Combustible materials in the raw material are converted into a gas and the ash is converted into slag. In the process, burners having different amounts of the distributed oxidizing agent are provided in plural stages and a large amount of the oxidizing agent is distributed into coal burners 62 as the first burner group. A char burner 104 as the second burner arranged on the same plane as that of the first burner group is installed to collect the unburned materials in the gas produced in the gasifying chamber 65 in the cyclone 70, passed from a char feed hopper 90 through a feeder 100 and, together with the oxidizing agent, fed to the char burner 103. The oxidizing agent is fed to each coal burner 62 and the char burner 104 with a control valve 111 to gasify the raw material and fed unburned materials at a high gasifying ratio.

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