WO2022118863A1 - 排気ガイド、竪型ミル及び排気方法 - Google Patents
排気ガイド、竪型ミル及び排気方法 Download PDFInfo
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- WO2022118863A1 WO2022118863A1 PCT/JP2021/043995 JP2021043995W WO2022118863A1 WO 2022118863 A1 WO2022118863 A1 WO 2022118863A1 JP 2021043995 W JP2021043995 W JP 2021043995W WO 2022118863 A1 WO2022118863 A1 WO 2022118863A1
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- Prior art keywords
- case
- exhaust
- gas
- exhaust guide
- gas flow
- Prior art date
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- 238000000034 method Methods 0.000 title claims description 7
- 239000000843 powder Substances 0.000 claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims description 25
- 238000013459 approach Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims 1
- 239000002994 raw material Substances 0.000 description 10
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/04—Mills with pressed pendularly-mounted rollers, e.g. spring pressed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
Definitions
- This disclosure relates to gas emissions in a vertical mill.
- Patent Document 1 discloses this type of vertical mill.
- the gas inlet is provided at the lower part of the vertical mill, and the product outlet is provided at the upper case of the vertical mill.
- the raw material crushed by the crushing roller is blown up by the gas introduced from the gas inlet.
- the blown-up raw material is classified by a separator having a rotating portion.
- the classified powdered raw material is taken out together with gas from the product outlet.
- the separator is housed in the upper casing.
- the upper case covers above the separator.
- the upper case comprises a base having a center point.
- the center point of the base is eccentrically arranged with respect to the rotation center axis of the separator.
- Patent Document 1 states that this eccentric arrangement can eliminate the bias of the theoretical classification point in the circumferential direction of the separator, so that the particle size distribution of the product can be reduced and the quality of the product can be improved. ..
- Patent Document 1 the base of the upper case is eccentrically arranged, but this is to reduce the particle size width of the classification, and does not consider the pressure loss. Therefore, there has been a demand for a configuration that is more energy-saving.
- the present disclosure has been made in view of the above circumstances, and the purpose is to reduce the pressure loss of the gas flow and improve the energy saving in the exhaust guide of the vertical mill.
- an exhaust guide having the following configuration. That is, this exhaust guide is used in a vertical mill provided with a separator for classifying powder by a rotor, and exhausts gas mixed with powder.
- the exhaust guide includes a case and a core. A gas flow path is formed inside the case.
- the core portion is arranged inside the case.
- the case is formed with an opening for introducing gas from below into the case.
- the outer peripheral portion of the case has a curved portion and a straight portion.
- the straight portion is tangentially connected to the curved portion.
- the center line of the gas flow path corresponding to the straight line portion is offset with respect to the center of the core portion in a plan view.
- An exhaust port for exhausting gas is formed at the end of the gas flow path corresponding to the straight line portion.
- the following exhaust method for exhausting the gas mixed with the powder in a vertical mill provided with a separator for classifying the powder by a rotor.
- the vertical mill includes a case and a core portion.
- a gas flow path is formed inside the case.
- the core portion is arranged inside the case.
- the case is formed with an opening for introducing gas from below into the case.
- the outer peripheral portion of the case has a curved portion and a straight portion.
- the straight portion is tangentially connected to the curved portion.
- the center line of the gas flow path corresponding to the straight line portion is offset with respect to the center of the core portion in a plan view.
- the exhaust method includes a first step, a second step, and a third step. In the first step, gas is introduced into the case through the opening. In the second step, the gas inside the case is flowed along the curved portion and the straight portion in this order. In the third step, the gas flowing along the straight line portion is discharged from the exhaust port.
- the introduced gas rises while swirling and is discharged from the exhaust port so as not to obstruct the swirling, so that it is possible to suppress the bias of the gas flow velocity especially in the vicinity of the exhaust port.
- the pressure loss in the exhaust guide can be effectively reduced, and energy saving can be realized.
- the turbulence of the gas flow can be reduced inside the exhaust guide, the wear of the inner wall can be suppressed and the durability is good.
- the perspective view which shows the overall structure of the vertical mill which concerns on one Embodiment of this disclosure.
- FIG. 1 is a perspective view showing an overall configuration of a vertical mill 1 according to an embodiment of the present disclosure.
- FIG. 2 is a perspective view of the exhaust guide 16 as viewed from above.
- FIG. 3 is a plan view of the exhaust guide 16.
- FIG. 4 is a perspective view of the exhaust guide 16 as viewed from below.
- the vertical mill 1 shown in FIG. 1 can crush the charged object.
- Examples of the object to be crushed include, but are not limited to, cement, slag, coal and the like.
- the vertical mill 1 includes a speed reducer 2, a lower casing 3, an upper casing 4, a rotary table 5, a crushing roller 6, a hydraulic cylinder 9, a coarse powder return guide 11, a charging chute 12, and a separator 15. And an exhaust guide 16.
- a speed reducer 2 a lower casing 3, an upper casing 4, a rotary table 5, a crushing roller 6, a hydraulic cylinder 9, a coarse powder return guide 11, a charging chute 12, and a separator 15.
- an exhaust guide 16 In order to show the internal structure of the vertical mill 1 in an easy-to-understand manner, in FIG. 1, a part of the structure is shown transparently by a chain line.
- a rotary table 5 is attached to the upper part of the speed reducer 2.
- the rotary table 5 is rotatably supported around a rotation axis in the vertical direction.
- An electric motor 60 as a drive source is arranged in the vicinity of the speed reducer 2.
- the rotation of the output shaft of the electric motor 60 is transmitted to the speed reducer 2 via the transmission shaft 61.
- the speed reducer 2 decelerates the rotation input from the electric motor 60 and transmits the rotation to the rotary table 5.
- the rotary table 5 is formed in a circular shape in a plan view.
- the rotary table 5 can receive the object to be crushed charged into the vertical mill 1 on the upper surface.
- a plurality of crushing rollers 6 are arranged so as to be placed on the peripheral edge of the upper surface of the rotary table 5.
- the number of crushing rollers 6 is arbitrary.
- a lower casing 3 is provided so as to cover the periphery of the rotary table 5 and the space above the rotary table 5.
- the plurality of crushing rollers 6 are located in the internal space of the lower casing 3.
- a stand 7 is provided around the speed reducer 2 (outside the lower casing 3) so that the positions of the crushing rollers 6 correspond to each other.
- a pressurizing arm 8 for pressurizing the crushing roller 6 toward the rotary table 5 is rotatably supported on the stand 7.
- the pressurizing arm 8 is formed elongated in the vertical direction. A midway portion of the pressurizing arm 8 in the longitudinal direction is rotatably supported about a horizontal axis with respect to the stand 7. The lower end of the pressurizing arm 8 is connected to the hydraulic cylinder 9. The upper end of the pressurizing arm 8 is connected to a support member 10 described later.
- the support member 10 is a tubular member, and its axis is arranged along the radial direction of the rotary table 5 in a plan view.
- the support member 10 is rotatably supported with respect to the stand 7.
- the tip of the support member 10 is inserted inside the lower casing 3.
- the crushing roller 6 is cantileveredly supported at the tip of the support member 10.
- One end of the hydraulic cylinder 9 is connected to the ground, and the other end is connected to the pressure arm 8.
- a force in the direction of bringing the crushing roller 6 closer to the rotary table 5 can be applied via the pressurizing arm 8 and the support member 10.
- a funnel-shaped coarse powder return guide 11 is arranged above the rotary table 5.
- the lower portion of the coarse powder return guide 11 is formed in a cylindrical shape having a small diameter.
- a downward opening is formed at the lower end of the coarse powder return guide 11, and this opening faces the center of the upper surface of the rotary table 5.
- a cylindrical charging chute 12 is connected in the middle of the lower part of the coarse powder returning guide 11.
- the charging chute 12 is diagonally arranged so as to penetrate the upper casing 4.
- a charging port 13 is formed at the end of the charging chute 12.
- the upper part of the coarse powder return guide 11 is formed in a hollow taper shape with a larger diameter toward the upper side.
- the upper end of the coarse powder return guide 11 is open upward.
- a separator 15 is arranged on the upper part of the vertical mill 1.
- the separator 15 includes a fixed vane 14 and a rotor 31.
- a plurality of fixed vanes 14 are provided above the outer peripheral portion of the openings formed at the upper ends of the coarse powder return guide 11.
- the plurality of fixed vanes 14 are arranged side by side in the circumferential direction at appropriate intervals so as to substantially follow the outer periphery of the opening of the coarse powder return guide 11.
- Each fixed vane 14 is formed elongated in the vertical direction.
- the rotor 31 is arranged inside the upper casing 4 and above the coarse powder return guide 11, and is suspended and supported.
- the rotor 31 can rotate about a rotation axis in the vertical direction.
- the rotor 31 includes a plurality of rotating vanes 33.
- the plurality of rotating vanes 33 are arranged side by side in the circumferential direction at appropriate intervals.
- Each rotating vane 33 is formed elongated in the vertical direction.
- the rotating vane 33 is located on the inner peripheral side of the fixed vane 14.
- the central shaft 34 of the rotor 31 is fixed to the transmission shaft 35 for transmitting the rotational force to the rotor 31.
- the transmission shaft 35 is connected to an appropriate drive source (not shown). As a result, the rotor 31 can be rotated in the direction of the thick arrow in FIG.
- a ring frame 36 is arranged on the outer peripheral side of the upper part of the central shaft 34.
- the ring frame 36 is fixed to the central shaft 34 by a plurality of rod-shaped members 37.
- Each rod-shaped member 37 is formed elongated in the radial direction.
- the plurality of rod-shaped members 37 are arranged side by side in the circumferential direction at appropriate intervals.
- the upper end of each rotating vane 33 is fixed to the ring frame 36.
- the bottom plate 38 is fixed to the lower part of the central shaft 34.
- the bottom plate 38 is formed in a tapered shape having a larger diameter toward the bottom.
- the lower end of each rotating vane 33 is fixed to the outer peripheral portion of the bottom plate 38.
- the upper part of the space between the central axis 34 and the rotating vane 33 is open, and the lower part is closed by the bottom plate 38.
- the internal space of the rotor 31 is connected to the internal space of the exhaust guide 16 arranged above the rotor 31.
- a hollow exhaust guide 16 is fixed above the upper casing 4.
- the internal space of the exhaust guide 16 is open downward. This open portion is connected to the inside of the upper casing 4.
- the exhaust guide 16 is formed with an exhaust port 41 that faces diagonally upward. The details of the configuration of the exhaust guide 16 will be described later.
- an introduction port 71 for introducing gas (hot air) into the lower casing 3 is formed.
- the charged clinker and auxiliary materials fall from the lower end of the coarse powder return guide 11 to the center of the rotary table 5 via the charging chute 12 and the coarse powder return guide 11.
- the clinker and the auxiliary raw material move to the outer peripheral side by centrifugal force as they rotate together with the rotary table 5.
- the clinker and the auxiliary raw material are crushed by the crushing roller 6 located on the outer peripheral side of the rotary table 5.
- the crushed and finely divided clinker and auxiliary raw material powder (hereinafter, simply referred to as powder) are blown up by the gas supplied from the introduction port 71.
- the powder is guided to the outer peripheral side of the fixed vane 14 by the tapered portion on the upper part of the coarse powder return guide 11, and then passes between the fixed vanes 14 together with the gas from the outer circumference to the inner circumference. If the powder is fine, it can pass through the rotating rotating vane 33.
- the powder that has passed through the gap of the rotating vane 33 escapes upward from the space on the inner peripheral side of the rotating vane 33 and is supplied to the inside of the exhaust guide 16.
- the gas mixed with powder supplied to the exhaust guide 16 is discharged from the exhaust port 41.
- the powder If the powder cannot pass through the gap of the rotating vane 33 because it is coarse, the powder falls by its own weight into the upward opening formed in the coarse powder return guide 11. The coarse powder falls from the lower end of the coarse powder return guide 11 to the center of the upper surface of the rotary table 5 again, and is crushed again by the crushing roller 6.
- a bug filter (not shown) and a suction fan are connected to the exhaust port 41. Clinker and auxiliary raw material powder are collected by a bug filter and shipped as finished cement. Instead of the suction fan, a push-in fan may be provided upstream of the introduction port 71.
- the plurality of fixed vanes 14 are all oriented so as to be inclined with respect to the circumferential direction. Further, as the rotor 31 rotates, the rotating vane 33 moves along a circular locus immediately on the inner peripheral side of the fixed vane 14. As a result, the gas that has passed in the order of the fixed vane 14 and the rotating vane 33 is given a swirling flow component that swirls in the direction of the thick arrow in FIG. Therefore, the gas mixed with the powder flows spirally from the inside of the rotor 31 toward the inside of the exhaust guide 16.
- the exhaust guide 16 has a characteristic shape in order to smoothly discharge the gas having a swirling component from the exhaust port 41 in this way.
- the exhaust guide 16 will be described in detail with reference mainly to FIGS. 2 to 4.
- the exhaust guide 16 includes a hollow case 42.
- a ring-shaped opening 43 is formed below the case 42. Through this opening 43, the gas mixed with powder flows from the lower separator 15 into the inside of the case 42.
- a cylindrical portion (core portion) 44 is fixed to a substantially central portion of the case 42.
- the cylindrical portion 44 defines the inner peripheral side of the swirling gas flow path in the case 42.
- the cylindrical portion 44 is arranged with its axis oriented in the vertical direction.
- the center of the cylindrical portion 44 coincides with the center of the ring-shaped opening 43.
- the upper and lower sides of the cylindrical portion 44 are open.
- the transmission shaft 35 is omitted in FIGS. 2 and 2, the transmission shaft 35 described above passes through the inside of the cylindrical portion 44.
- the central axis of the cylindrical portion 44 coincides with the rotation axis of the rotor 31 in the separator 15.
- the outer periphery of the case 42 in a plan view has a first portion 45a having a constant diameter, a second portion (curved portion) 45b having a larger diameter as it approaches the exhaust port 41 in the circumferential direction, and a second portion. It has a linear third portion (straight portion) 45c connected to the end of the two portions 45b.
- the first portion 45a corresponds to the upstream portion of the gas flow path in the exhaust guide 16. Since the diameter of the case 42 is constant in the first portion 45a, the distance between the cylindrical portion 44 and the side wall of the outer peripheral portion of the case 42 is substantially constant. In the first portion 45a, the contour of the outer peripheral portion of the opening 43 in the plan view and the contour of the outer peripheral portion of the case 42 substantially coincide with each other.
- the spiral guide (guide portion) 46 is fixed between the cylindrical portion 44 and the case 42.
- the spiral guide 46 is formed in a spiral shape so as to be upward as the phase changes toward the downstream side of the gas flow path in the exhaust guide 16.
- the upper end of the spiral guide 46 is connected to the lower surface of the upper wall of the case 42.
- the spiral guide 46 can guide the gas that has entered from the opening 43 near the upstream end of the gas flow path in the exhaust guide 16 so as to flow smoothly in the case 42 while swirling.
- the second portion 45b corresponds to the intermediate portion of the gas flow path in the exhaust guide 16.
- the diameter of the case 42 increases smoothly as it approaches one side in the circumferential direction (downstream side of the flow path). Therefore, the second portion 45b has a spiral shape in a plan view.
- the distance between the cylindrical portion 44 and the outer peripheral portion of the case 42 gradually increases as it becomes downstream.
- the cross-sectional area of the flow path increases toward the downstream.
- the center line of the flow path in a plan view becomes a spiral shape that changes away from the center of the cylindrical portion 44 as it goes downstream.
- the lower end of the second portion 45b in the case 42 and the edge of the opening 43 are closed by a closing plate 47.
- the center of the ring-shaped opening 43 coincides with the center of the cylindrical portion 44.
- the third portion 45c corresponds to the downstream portion of the gas flow path in the exhaust guide 16.
- the third portion 45c is tangentially connected to the end of the curved (arc-shaped) second portion 45b.
- the linear flow path corresponding to the third portion 45c is bent so as to be diagonally upward in the middle of the longitudinal direction.
- the above-mentioned exhaust port 41 is formed at the end of the downstream portion.
- the linear flow path corresponding to the third portion 45c is formed so that the cross section is rectangular. As shown in FIG. 3, the center line 48 of this flow path is offset to one side with respect to the center of the cylindrical portion 44 in a plan view.
- the flow path of the portion of the third portion 45c may be formed so that the cross section is circular.
- the gas is introduced into the inside of the case 42 from the opening 43 (first step). Specifically, the gas passes through the opening 43 and spirally flows into the space corresponding to the first portion 45a or the second portion 45b.
- the gas flows along the second portion 45b, i.e., along the spiral portion where the diameter of the outer peripheral portion of the case 42 increases toward the downstream. Since the cross-sectional area of the flow path increases by the amount of the increase in diameter and does not hinder the turning, the deviation of the gas flow velocity is less likely to occur.
- the gas flows along the order of the second portion 45b and the third portion 45c (second step).
- the diameter of the range of the second portion 45b is set so that the flow velocity does not increase even if the gas from below merges as it goes downstream. Since the second portion 45b and the third portion 45c are connected in the tangential direction, turbulence of the gas flow at the connecting portion hardly occurs. After that, the gas is discharged diagonally upward from the exhaust port 41 (third step).
- the exhaust guide 16 having such a configuration, it is possible to effectively suppress the pressure loss when the gas flow passes through. Therefore, for example, energy saving of the above-mentioned blower fan installed on the downstream side of the exhaust guide 16 can be realized. Further, since the bias of the gas flow velocity (in other words, the turbulence of the gas flow) is suppressed, it is possible to prevent the powder from colliding with the inner wall of the case 42 with a strong force. As a result, the wear inside the case 42 can be reduced.
- 5 and 6 show the results of obtaining the flow velocity distributions at the exhaust ports 41 and 41z by simulation analysis by computational fluid dynamics for each of the exhaust guide 16z of the comparative example and the exhaust guide 16 of the present embodiment. It is shown.
- the exhaust guide 16z of the comparative example will be briefly described.
- the center line of the linear flow path toward the exhaust port 41z is arranged so as not to be offset with respect to the center of the cylindrical portion 44z arranged inside the case 42z.
- Case 42z does not have the spiral second portion 45b as shown in the embodiment described above.
- the linear flow path toward the exhaust port 41z is not tangentially connected to the outer periphery of the case 42z, but is connected radially to the case 42z.
- the portion where the flow velocity is larger than the predetermined value is indicated by hatching.
- the parts where the flow velocity is large are distributed over a wide range, and the part near the outer peripheral side in the swirling direction of the gas (AB side) has a particularly large flow velocity. You can see that there is.
- the exhaust guide 16 of the present embodiment it can be seen that the generation of the flow velocity increasing portion is effectively suppressed in the exhaust port 41.
- the exhaust guide 16 of the present embodiment is used for the vertical mill 1 provided with the separator 15 for classifying the powder by the rotor 31, and exhausts the gas mixed with the powder.
- the exhaust guide 16 includes a case 42 and a cylindrical portion 44.
- a gas flow path is formed inside the case 42.
- the cylindrical portion 44 is arranged inside the case 42.
- the case 42 is formed with an opening 43 for introducing gas into the inside of the case 42 from below.
- the outer peripheral portion of the case 42 has a curved second portion 45b and a linear third portion 45c.
- the third portion 45c is tangentially connected to the second portion 45b.
- the center line 48 of the gas flow path corresponding to the third portion 45c is offset with respect to the center of the cylindrical portion 44 in a plan view.
- An exhaust port 41 for exhausting gas is formed at the end of the gas flow path corresponding to the third portion 45c.
- the introduced gas rises while swirling and is discharged from the exhaust port 41 so as not to obstruct the swirling, so that it is possible to suppress the bias of the gas flow velocity particularly in the vicinity of the exhaust port 41.
- the pressure loss in the exhaust guide 16 can be effectively reduced, and energy saving can be realized. Further, since uneven wear of the inner wall of the exhaust guide 16 can be suppressed, the durability is good.
- the second portion 45b is formed in a spiral shape so that the distance from the center of the cylindrical portion 44 increases as the second portion 45b approaches the third portion 45c in the circumferential direction.
- the exhaust guide 16 of the present embodiment includes a closing plate 47 that closes the lower side of the case 42 between the second portion 45b on the outer peripheral portion of the case 42 and the edge portion of the opening 43.
- the exhaust guide 16 of the present embodiment includes a spiral guide 46.
- the spiral guide 46 is arranged above at least a part of the swirling gas flow path from the opening 43 to the exhaust port 41.
- the vertical mill 1 of the present embodiment includes an exhaust guide 16 and a separator 15.
- the separator 15 classifies the powder by the rotor 31.
- the gas mixed with the classified powder can be smoothly discharged from the exhaust port 41.
- the closing plate 47 may be configured in an inclined shape.
- the direction of inclination is arbitrary, but for example, the closing plate 47 can be inclined so as to be downward as it approaches the opening 43. By inclining the closing plate 47, powder is less likely to be deposited on the upper surface of the closing plate 47, so that maintainability is improved.
- the second portion 45b can be formed so as not to have a spiral shape but to have a constant diameter like the first portion 45a.
- the first portion 45a may not be formed so as to have a constant diameter, but may be formed in a spiral shape like the second portion 45b.
- a rod-shaped pillar portion may be arranged inside the case 42.
- the spiral guide 46 can be omitted. The same effect can be achieved by forming the upper wall of the case 42 in a spiral shape to serve as a guide portion.
- the lower end of the charging chute 12 does not have to be connected to the middle part of the coarse powder return guide 11. In this case, the clinker and auxiliary raw materials charged into the charging port 13 directly fall from the lower end of the charging chute 12 onto the rotary table 5.
- the vertical mill 1 is configured so that the rotation direction of the rotor 31 is the direction of the thick arrow in FIG.
- the vertical mill 1 can be configured so that the rotation direction of the rotor 31 is opposite to the above.
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Abstract
Description
Claims (7)
- ロータによって粉末を分級するセパレータを備える竪型ミルに用いられ、粉末混じりのガスを排気する排気ガイドであって、
内部にガス流路が形成されたケースと、
前記ケースの内部に配置された芯部と、
を備え、
前記ケースには、前記ケースの内部へ下方からガスを導入するための開口が形成され、
前記ケースの外周部は、
曲線部分と、
前記曲線部分に接線方向で接続する直線部分と、
を有し、
前記直線部分に相当するガス流路の中心線は、平面視で、前記芯部の中心に対してオフセットしており、
前記直線部分に相当するガス流路の終端に、ガスを排気するための排気口が形成されることを特徴とする排気ガイド。 - 請求項1に記載の排気ガイドであって、
前記曲線部分は、周方向で前記直線部分に近づくにつれて前記芯部の中心からの距離が増加する渦巻状部分であることを特徴とする排気ガイド。 - 請求項2に記載の排気ガイドであって、
前記ケースの外周部における前記渦巻状部分と、前記開口の縁部と、の間で、前記ケースの下側を閉じる閉鎖板を備えることを特徴とする排気ガイド。 - 請求項3に記載の排気ガイドであって、
前記閉鎖板が傾斜していることを特徴とする排気ガイド。 - 請求項1又は2に記載の排気ガイドであって、
螺旋状のガイド部を備え、
前記ガイド部は、前記開口から前記排気口に至る旋回状の前記ガス流路の少なくとも一部の上側に配置されることを特徴とする排気ガイド。 - 請求項1から5までの何れか一項に記載の排気ガイドと、
前記ロータによって粉末を分級する前記セパレータと、
を備えることを特徴とする竪型ミル。 - ロータによって粉末を分級するセパレータを備える竪型ミルにおいて、粉末混じりのガスを排気する排気方法であって、
前記竪型ミルは、
内部にガス流路が形成されたケースと、
前記ケースの内部に配置された芯部と、
を備え、
前記ケースには、前記ケースの内部へ下方からガスを導入するための開口が形成され、
前記ケースの外周部は、
曲線部分と、
前記曲線部分に接線方向で接続する直線部分と、
を有し、
前記直線部分に相当するガス流路の中心線は、平面視で、前記芯部の中心に対してオフセットしており、
前記排気方法は、
ガスを前記開口から前記ケースの内部に導入する第1工程と、
前記ケースの内部のガスを、前記曲線部分、前記直線部分の順に沿うように流す第2工程と、
前記直線部分に沿って流れたガスを、排気口から排出する第3工程と、
を含むことを特徴とする排気方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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DE112021006244.1T DE112021006244T5 (de) | 2020-12-01 | 2021-11-30 | Abluftführung, vertikalmühle und abluftverfahren |
JP2022566948A JP7514952B2 (ja) | 2020-12-01 | 2021-11-30 | 排気ガイド及び排気方法 |
CN202180080727.3A CN116648308A (zh) | 2020-12-01 | 2021-11-30 | 排气引导器、立式粉碎机以及排气方法 |
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JP (1) | JP7514952B2 (ja) |
CN (1) | CN116648308A (ja) |
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WO (1) | WO2022118863A1 (ja) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4192469A (en) * | 1977-02-21 | 1980-03-11 | Heinz Jager | Spring roll mill |
US4235385A (en) * | 1978-09-06 | 1980-11-25 | Loesche Gmbh | Roller mill with liquid-gas suspension |
JPS5775156A (en) * | 1980-10-28 | 1982-05-11 | Ube Industries | Pulverizer |
JPS57181380U (ja) * | 1981-05-12 | 1982-11-17 | ||
JPS58180242A (ja) * | 1982-04-16 | 1983-10-21 | 川崎重工業株式会社 | 竪型粉砕機 |
JPH0386043U (ja) * | 1989-12-21 | 1991-08-30 | ||
JP2016131909A (ja) * | 2015-01-16 | 2016-07-25 | 宇部興産機械株式会社 | 竪型粉砕機 |
JP2016203076A (ja) * | 2015-04-21 | 2016-12-08 | 宇部興産機械株式会社 | 竪型粉砕機及びその運転方法 |
-
2021
- 2021-11-30 JP JP2022566948A patent/JP7514952B2/ja active Active
- 2021-11-30 DE DE112021006244.1T patent/DE112021006244T5/de active Pending
- 2021-11-30 WO PCT/JP2021/043995 patent/WO2022118863A1/ja active Application Filing
- 2021-11-30 CN CN202180080727.3A patent/CN116648308A/zh active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4192469A (en) * | 1977-02-21 | 1980-03-11 | Heinz Jager | Spring roll mill |
US4235385A (en) * | 1978-09-06 | 1980-11-25 | Loesche Gmbh | Roller mill with liquid-gas suspension |
JPS5775156A (en) * | 1980-10-28 | 1982-05-11 | Ube Industries | Pulverizer |
JPS57181380U (ja) * | 1981-05-12 | 1982-11-17 | ||
JPS58180242A (ja) * | 1982-04-16 | 1983-10-21 | 川崎重工業株式会社 | 竪型粉砕機 |
JPH0386043U (ja) * | 1989-12-21 | 1991-08-30 | ||
JP2016131909A (ja) * | 2015-01-16 | 2016-07-25 | 宇部興産機械株式会社 | 竪型粉砕機 |
JP2016203076A (ja) * | 2015-04-21 | 2016-12-08 | 宇部興産機械株式会社 | 竪型粉砕機及びその運転方法 |
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JPWO2022118863A1 (ja) | 2022-06-09 |
DE112021006244T5 (de) | 2023-09-07 |
JP7514952B2 (ja) | 2024-07-11 |
CN116648308A (zh) | 2023-08-25 |
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