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61. 发明专利

JPH02253859A ROLLER MILL 失效
公开(公告)号：JPH02253859A
公开(公告)日：1990-10-12
申请号：JP7731289
申请日：1989-03-29
申请人： BABCOCK HITACHI KK
发明人： SATOU KAZUNORI , SHOJI KAZUNORI , MEGURI NOBUYASU , KANEMOTO HIROAKI , TAOKA YOSHINORI , HASEGAWA TADASHI
IPC分类号： B02C15/04
摘要： PURPOSE:To enhance grinding capacity and to inhibit vibration by providing a projected body to the top end part of the outer circumference of the groove face of a grinding rice so that the depth of the grinding race is regulated to the relation of a specified rate for the diameter of a grinding roller. CONSTITUTION:A grinding table 3 is rotated in the horizontal face of the inside of a vertical cylindrical mill housing 11. Further a grinding race 18 having a groove face formed of a circular arc-like cross section is provided on the upper surface of the table 3 along the outer circumference thereof. Prescribed pressure is exerted on a plurality of grinding rollers 4 which are touchingly provided to the groove face of this grinding race 18 and have a circular arc-like cross section by the pressure devices 5-10. Furthermore a raw material to be ground is supplied on the table 3 through a raw material feed pipe 2 and also produced fine powder is discharged through a device 24. A projected body 19 is provided to the top end part of the outer circumference of the groove face of the grinding race 18 so that the depth of the race 18 is regulated to 0.2 times or more and to 0.4 times or below of the diameter of the roller 4. As a result, grinding capacity can be enhanced and vibration can be inhibited.

62. 发明专利

JPH02157052A VERTICAL CRUSHER OF ROTARY CLASSIFYING TYPE 失效
公开(公告)号：JPH02157052A
公开(公告)日：1990-06-15
申请号：JP30770888
申请日：1988-12-07
申请人： BABCOCK HITACHI KK
发明人： KANEMOTO HIROAKI , TAOKA YOSHINORI , HASEGAWA TADASHI , SHOJI KAZUNORI , MEGURI NOBUYASU , SATOU KAZUNORI
IPC分类号： B02C23/00 , B02C23/12 , B02C23/20
摘要： PURPOSE:To prevent the leakage of particles and material feed air and the entry of foreign matter into bearings by providing a fixed cylinder having a sealing air feed opening and a rotary cylinder having a sealing air passage hole and so constructing as to pressurize its inner and outer peripheries with the sealing air. CONSTITUTION:A sealing air G from a sealing air feed opening 42 of a fixed cylinder 28 flows in part through a sealing air passage hole 43 above the upper bearing 29 of a rotary cylinder 23 and then between the rotary cylinder 23 and a coal feed pipe 14 toward a vertical crusher 3 and in part through a sealing air passage hole 45 below the lower bearing 30 of the rotary cylinder 23 and then between the fixed cylinder 28 and the rotary cylinder 23 toward the vertical crusher 3. The pressure of air between the bearings 29 and 30 disposed between the fixed and rotary cylinders 28 and 23 is held higher than the inner pressure of the vertical crusher 3 by a sealing air passage hole 44 of the rotary cylinder 23 between the bearings 29 and 30 and the pressure of air above the upper bearing 29 can also be held higher directly by the sealing air G drawn in from the fixed cylinder 28.

63. 发明专利

JPH02152582A MILL EQUIPPED WITH ROTARY CLASSIFIER 失效
公开(公告)号：JPH02152582A
公开(公告)日：1990-06-12
申请号：JP30552488
申请日：1988-12-02
申请人： BABCOCK HITACHI KK
发明人： SATOU KAZUNORI , SHOJI KAZUNORI , MEGURI NOBUYASU , KANEMOTO HIROAKI , TAOKA YOSHINORI , HASEGAWA TADASHI
IPC分类号： B07B7/083 , B02C23/12 , B02C23/24
摘要： PURPOSE:To eliminate the stagnant region of particles and to increase amount of fine particle size and of throughput by providing a plurality of internal blades to the wall surface of the outer circumference of a rotary classifier in a mill which is equipped with a pulverizing part and a pneumatic transporter in the lower part and with a raw material feeder and a rotary classifier in the upper part. CONSTITUTION:Both a pulverizing part consisting of a table 3, a rail 5 and rollers 12 and a device for pneumatically transporting pulverized material by hot air 10 to a rotary classifier 25 provided to the upper part of a housing are provided to the lower part of the inside of the housing 11. Further both a raw material feeder (center chute 2) of material to be pulverized and the rotary classifier 25 having a plurality of blades 17 for classifying the raw material into fine powder and coarse powder are provided to the upper part. In this constitution, a plurality of internal blades 19 are provided to the wall surface of the outer circumference of the rotary classifier 25 while keeping the intervals toward the center axis of the mill. Thereby the group of coarse grains removed by centrifugal force of the rotary classifier 25 are received by collision against these blades 19, are fallen again to the pulverizing part and are recirculated.

64. 发明专利

JPH0263558A VERTICAL TYPE ROLLER MILL 失效
公开(公告)号：JPH0263558A
公开(公告)日：1990-03-02
申请号：JP21507988
申请日：1988-08-31
申请人： BABCOCK HITACHI KK
发明人： SATOU KAZUNORI , SHOJI KAZUNORI , MEGURI NOBUYASU , KANEMOTO HIROAKI , TAOKA YOSHINORI , HASEGAWA TADASHI
IPC分类号： B02C15/04
摘要： PURPOSE:To improve grinding capacity and to decrease blast driving power and the pressure drop in the mill by providing a regulating means for regulating the supply of raw materials to be ground and the discharge of the ground raw materials to at least either of the supply side and discharge side of a turn table. CONSTITUTION:The raw materials 13 to be ground from a coal feed pipe 7 are supplied to the turn table 4 and grinding rollers 5 for grinding to coarse powder and fine powder and are ground by the turn table 4 and the grinding rollers 5. The regulating means 25a which regulates the supply of the raw materials 13 to be ground and the discharge of the ground raw materials are provided to at least either of the supply side 23 and discharge side 24 of the turn table 4. Namely, the stagnation time in the grinding part of the raw materials to be ground is prolonged and, therefore, the grinding capacity is increased and the blast driving power and the pressure loss in the mill are decreased.

65. 发明专利

JPH0226651A CRUSHED MATERIAL SORTING APPARATUS 失效
公开(公告)号：JPH0226651A
公开(公告)日：1990-01-29
申请号：JP17372688
申请日：1988-07-14
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： B02C15/04 , B02C23/32
摘要： PURPOSE:To improve particle sorting performance by providing the flow guides composed of a guide part around the inner wall of a mill casing near a particle sorting part for feeding the sorted coarse particles toward the center of a crushing part. CONSTITUTION:The small particles produced by crushing are delivered upwardly of a mill casing by a hot air 10 which is sent up through an air throat 11 provided around a rotary table 3. The coarse and heavy particles are dropped back onto the rotary table 3 due to the gravitational effect for regrinding. The coarse particles separated by a rotary sorting machine are received by a flow guide 17, dropped onto the rotary table 3 and sent back to a crushing part consisting of a crushing roller 7 and a crushing race 6 for regrinding. The coarse particles dropping within the mill casing are controlled by the flow guide 17 without any particle detaining zone being left, thereby permitting a substantial improvement of the particle sorting efficiency.

66. 发明专利

JPH01270953A VERTICAL ROLLER MILL 失效
公开(公告)号：JPH01270953A
公开(公告)日：1989-10-30
申请号：JP9677388
申请日：1988-04-21
申请人： BABCOCK HITACHI KK
发明人： MEGURI NOBUYASU , SHOJI KAZUNORI , SATOU KAZUNORI , KANEMOTO HIROAKI , TAOKA YOSHINORI , HASEGAWA TADASHI
IPC分类号： B02C15/04
摘要： PURPOSE:To conserve the operating power cost of a blower to a large extent by providing a T-shaped wall for dividing the space reaching the surface of a pulverizing table from the outer diameter upper ends of a plurality of rollers into the space around the center part of the pulverizing table and a plurality of spaces holding the rollers therebetween. CONSTITUTION:A T-shaped wall 21 consisting of partition plates 19, 20 divides the space reaching the surface of a pulverizing table 4 from the outer diameter upper ends of a plurality of rollers 7 into the space around the center part of the pulverizing table 4 and a plurality of the spaces holding the rollers 7 therebetween. As a result, the inflow of transport air toward the center of rotation of the pulverizing table 4 is prevented and the generation of the stagnation bed of pulverized particles in the fluidized bed above a slot 12 is prevented and, since the concn. of the pulverized particles is reduced and uniformized, the difference pressure of a particle bed and total pressure loss above the slot are reduced and the operating power cost of a blower can be conserved to a large extent.

67. 发明专利

JPH01270952A VERTICAL PULVERIZER 失效
公开(公告)号：JPH01270952A
公开(公告)日：1989-10-30
申请号：JP9677288
申请日：1988-04-21
申请人： BABCOCK HITACHI KK
发明人： KANEMOTO HIROAKI , SATOU KAZUNORI , SHOJI KAZUNORI , MEGURI NOBUYASU , HASEGAWA TADASHI , TAOKA YOSHINORI
IPC分类号： B02C15/04
摘要： PURPOSE:To enhance the pulverizing efficiency of a pulverizing part and to reduce the pressure loss in a housing by providing an appropriately inclined partition plate between rollers adjacent to each other and setting a slot to an appropriate opening. CONSTITUTION:In order to introduce the substance to be pulverized on a pulverizing table 4 on a roller biting side, a partition plate 20 having a surface for shielding the side surfaces of rollers 4 and inclined in the transfer direction of the pulverizing table 4 is provided between the mutually adjacent rollers. Further, a slot 5 is constituted so as not be opened at least to the region from the connection part of the partition plate 20 and the inner surface of a housing to the position just close to the roller biting side in the rotary direction of the pulverizing table 4. As a result, the pulverizing efficiency of a pulverizing part can be enhanced and pulverized particles after pulverization are efficiently transported to eliminate the stagnation in the lower part of a classifying part and the pressure loss in the housing is minimized and the power of the pulverizer can be reduced.

68. 发明专利

JPH01203058A VERTICAL MILL 失效
公开(公告)号：JPH01203058A
公开(公告)日：1989-08-15
申请号：JP2657088
申请日：1988-02-09
申请人： BABCOCK HITACHI KK
发明人： MEGURI NOBUYASU , SHOJI KAZUNORI , SATOU KAZUNORI , OSHIMA HIROSHI , TAOKA YOSHINORI , KANEMOTO HIROAKI
IPC分类号： B02C15/00 , B02C23/28
摘要： PURPOSE:To prevent delayed crushing of coal to pieces in a vertical mill and avoid a delayed response due to the delayed crushing timing by providing a blow-up means which blows up coal held up in the vertical mill, in the casing of a classifier. CONSTITUTION:If a command for lifting a load is issued, a control drive 22 drives to set an operating plate (blow-up means) 15 in the casing 14 of a classifi er 6 in an open condition for a specified time well in advance. Then the separa tion performance of the classifier 6 is temporarily decreased by opening of the operating plate 15 to supply pulverized coal obtained by blowing operation of coal held up in the vertical mill 2 to a coal feeder pipe 13 precedently. Thus, the delay in coal crushing in the vertical mill 2 is eliminated by operating action of an operating means 15 and the vertical mill 2 is controlled satisfacto rily in response to a load.

69. 发明专利

JPS6475050A VERTICAL MILL 失效
公开(公告)号：JPS6475050A
公开(公告)日：1989-03-20
申请号：JP23339487
申请日：1987-09-17
申请人： BABCOCK HITACHI KK
发明人： MEGURI NOBUYASU , SHOJI KAZUNORI , KAKO HIROYUKI , TAOKA YOSHINORI
IPC分类号： B02C15/12
摘要： PURPOSE: To make it possible to improve the grain size of the pulverized coal of a mill outlet and to decrease a mill differential pressure without lowering a pulverizing capacity by providing the circumference an upper ring with a skirt-like baffle plate directed toward a lower ring. CONSTITUTION: A pulverizing section B consists of a disk-shaped pulverizing table 27 which rotates around its central axis, the toric belt-like lower ring 19 which has a recessed front surface fixed to the outer periphery on the front surface of this table 27, balls 28 which are arranged over the entire circumference on the recessed front surface of the ring 19 and the upper ring 17 which is arranged on the balls 18, has a rear surface of a recessed toric band, is pressurized to press the balls in this recessed part and is so fixed as to be held static against the rotation of the ring 19. The spaces between inside surface of the wall and the outer peripheral surface of the pulverizing section B and the outer peripheral surface of a classifying section A are formed as air flow passages for transfer of the pulverized grains in a casing section 29. The circumference of the ring 17 is provided with the skirt-like baffle plate 50 directed toward the ring 29. Consequently, the reduction of the mill differential pressure is made possible.

70. 发明专利

JPS6467266A VERTICAL GRINDER OF ROTARY CLASSIFICATION TYPE 失效
公开(公告)号：JPS6467266A
公开(公告)日：1989-03-13
申请号：JP22301987
申请日：1987-09-08
申请人： BABCOCK HITACHI KK
发明人： TAOKA YOSHINORI , KODA FUMIO , HASEGAWA TADASHI , KANEMOTO HIROAKI , SHOJI KAZUNORI , MEGURI NOBUYASU
IPC分类号： B02C15/00 , B02C23/12 , F23K1/00
摘要： PURPOSE: To save the driving power of a force draft fan by disposing a conical plate having a funnel-shaped slope bored with plural pieces of circumferential holes and a central hole between a rotary type classifying machine and pulverizing rollers and disposing a wall plate between the pulverizing rollers and a casing. CONSTITUTION: The cylindrical casing 1 is internally provided with the classifying machine 8 which rotates around a first perpendicular shaft, a turn table 2 which rotates around a second perpendicular shaft below the classifying machine 8 and the plural pulverizing rollers 3 which roll on the table 2. The conical plate 11 having a downward grade heading toward the center is disposed in the space partitioning the classifying machine 8 and the pulverizing rollers 3. The bottom of the conical plate 11 is provided with the central hole 20 and is provided with the circumferential holes 12 with plural weirs 13 around the central hole 20. The outer side of the pulverizing rollers 3 is provided with a wall plate 17 overhanging from the casing 1 and the spacing between the wall plate 17 and the pulverizing rollers 3 is made adjustable. Consequently, the differential pressure of the mill is reduced and a contribution may be made to the saving of the driving power of the forced draft fan.

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