EP2363208A2 - Dispositif de broyage doté d'un élément de modification du flux de poussière - Google Patents

Dispositif de broyage doté d'un élément de modification du flux de poussière Download PDF

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Publication number
EP2363208A2
EP2363208A2 EP11154552A EP11154552A EP2363208A2 EP 2363208 A2 EP2363208 A2 EP 2363208A2 EP 11154552 A EP11154552 A EP 11154552A EP 11154552 A EP11154552 A EP 11154552A EP 2363208 A2 EP2363208 A2 EP 2363208A2
Authority
EP
European Patent Office
Prior art keywords
blade
mill
dust
dust flow
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11154552A
Other languages
German (de)
English (en)
Other versions
EP2363208A3 (fr
Inventor
Detlef Melchert
Tieu Le Van
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Power Europe GmbH
Original Assignee
Hitachi Power Europe GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Power Europe GmbH filed Critical Hitachi Power Europe GmbH
Publication of EP2363208A2 publication Critical patent/EP2363208A2/fr
Publication of EP2363208A3 publication Critical patent/EP2363208A3/fr
Withdrawn legal-status Critical Current

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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
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
    • B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
    • B02C13/08—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and acting as a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor

Definitions

  • the present invention is directed to a mill means for grinding regrind having a housing, a mill inlet for feeding the, preferably pre- or non-comminuted, ground material, a rotatably mounted shaft, and a supported by the shaft paddle / impact wheel, the plurality of blades distributed over the circumference of the blade / impact wheel, which form baffles for the ground material.
  • the present invention is directed to a method for grinding material to be ground by means of a mill device comprising a housing, a mill entrance for the supply of the ground material, a rotatably mounted shaft and a shaft supported by the blade / impact wheel, a variety of comprising vanes / beater wheel distributed vanes forming baffles for the ground stock, the method comprising the steps of: introducing the ground stock into the mill entry and passing the stock along a flow path passing through the rotating vane wheel , Wherein the material to be ground in front of the blade / impact wheel by means of the impact tool and by means of the blades of the blade / impact wheel is crushed to form dust.
  • Such mill devices can be used, for example, in power plants, such as coal-fired power plants, where they act, for example, as a brown coal mill. It can be provided that the mill means gases, in particular hot flue gases, sucks, which are fed together with the ground material of the mill means and serve during the crushing of the drying of the ground material.
  • the mentioned Gases have a transport function for the material to be ground or at least support such, and thus act as a carrier gas.
  • the impeller which is referred to there as a striking wheel, in addition to a beating or comminuting function for ground material, such as raw lignite, a fan function.
  • the impeller is designed so that the material to be ground is axially introduced or sucked in and leaves the impeller radially outward.
  • the blades of the impeller are distributed over the circumference axially between a disc and an annular disc in the radially outer regions thereof.
  • the circumferentially distributed blades form both free entry and free exit edges, that is to say both free radially inwardly located closing edges and free radially outer terminating edges.
  • the grinding stock introduced axially into the blade wheel is moved radially outward from the blade-free, radially inwardly located region, where it is picked up by the blades and crushed before it leaves the blade gap radially outward.
  • the DE 44 12 924 A1 explains that in mills without upstream racket part there is a risk that the flue gas flow and the grind unevenly hit the designated there as a paddle wheel impeller, whereby individual axial zones of the impeller by hot flue gas primarily thermally and other zones are mainly burdened by ground material by erosion can.
  • the DE 4 412 924 A1 in that the inwardly facing edge of the vanes projects inwardly over a portion of the width of the vanes into the inlet section of the impeller and that the protrusion faces the inlet of the striking wheel and has a width corresponding to between 1% and 40% of the blade width ,
  • the DE 44 12 924 A1 explains that said radial projections of the blades to swirl the picked up by them part of the abandoned ground material with the likewise supplied, hot carrier gas, and thus dries the fluidized, raw material to be ground in this area.
  • the carrier gas cools down so that hot strands of unused stripped carrier gas are avoided and the carrier gas assumes a uniform temperature over the cross section of the impeller.
  • the dust flow change elements are designed as radially inwardly extending from the blades projections, but increases the radial space of the inevitably Paddle wheel inside, which may be undesirable in certain applications.
  • the present invention has the object to provide a solution that provides a way to extend the life of the blades of a paddle wheel of a mill device for grinding Mahlgutschafft which is not necessarily at the expense of radial space requirements.
  • the object is achieved in that the mill device has at least one dust flow change element for changing the direction of movement of millbase dust formed during milling, wherein the at least one dust flow change element is arranged on a longitudinal side surface of a blade, which forms the impact surface of the blade, is formed and projects from the longitudinal side surface into the intermediate space between two adjacent blades.
  • the object is achieved in that the flow path of the dust is changed by means of at least one dust flow change element, which is formed on a longitudinal side surface of a blade, which forms the baffle of the blade, and from the longitudinal side surface protrudes into the space between two adjacent blades.
  • the dust flow change element arranged in this way can in particular have a deflection function and / or a turbulence function for the dust of the ground material.
  • Such a mill device has compared to that of the DE 44 12 924 A1 known mill device has the advantage that the life of the blades can be extended without this inevitably goes to the detriment of the radial space on the radial inside of the blade wheel.
  • the invention may, however, also be developed so that the blades of the blade wheel additionally have at its radial inner edge one or more projections to thereby influence the flow of the ground material or Mahlgutstaubs or any carrier or flue gases, in particular to change. This may be the case, in particular, if the mill is designed in such a way that the requirement of an additional radial installation space due to the projections can be accepted inwardly.
  • the design according to the invention in which one or more dust flow change elements are provided between blades which are adjacent in the circumferential direction of the shaft, offers the further possibility of not only - as is known from US Pat DE 44 12 924 A1 provided design is the case - to be used in such paddle wheels, the blades form radially inner free edges or in which the material is fed axially and then discharged radially through the blade to the outside, but also in such paddle wheels whose blades are not radially inside form a continuous free edge.
  • paddle wheels in which radially inner blades are not formed with continuous free edges, represent such paddle wheels, as they come in so-called racquet mills used.
  • racquet mills used.
  • racket mill which can be combined with an impeller also in the design as a blower mill, is in the DE 1 984 772 A1 shown.
  • blower wheels used in such racquet mills are also referred to herein as impact wheels or paddle wheels.
  • the term “paddle wheel” thus covers in particular an impeller in a DGS mill and the term “impact wheel” in particular an impeller in an N or NV mill.
  • the term “paddle wheel” or “beater wheel” also covers so-called fan wheels.
  • Fan wheels are in this sense in particular provided with blades wheels which have a suction or blowing function.
  • Such blower wheels additionally have a striking function which is such that grinding stock introduced between the blades or in the region of the leading edge of the impeller can be comminuted by the blades; This can be done by means of a respective blade surface and / or by means of the blade edges.
  • a paddle wheel designed as an impeller may be configured to include a washer and a hub disc axially spaced from the washer, the fan wheel being rotatably supported by the wheel hub, such as fixed to a shaft, and axially interposed the wheel hub and the wheel ring extend circumferentially distributed blades.
  • the wheel hub such as fixed to a shaft
  • the wheel hub such as fixed to a shaft
  • flowing gas such as flue gas
  • the impeller is configured as an impeller and in which the grinding material enters the impeller axially and then radially from the inside, it can be provided that the radially inner inlet edges of the blades are arranged parallel to the axis of rotation of the impeller or parallel to a shaft carrying the impeller.
  • the dust flow change element is designed as a projection.
  • a dust-flow change element designed as a projection is formed on a surface of a blade.
  • the dust flow-changing element is designed as a projection and is formed on a surface of a blade, on a front surface of the blade in the direction of rotation of the blade wheel.
  • the mill device may have a drive device, which is designed for example as a motor and can drive the impeller rotationally.
  • a transmission may be connected between such a drive device and the paddle wheel, in particular a gear which causes a reduction or a translation.
  • At least one dust-flow change element designed as a projection is provided on each blade of the blade wheel.
  • only individual ones of the blades are provided with such a dust flow change element.
  • one, several or all blades of the blade wheel are provided with a plurality of dust flow change elements, such as projections are.
  • two, or three, or four, or five, or more than five dust flow modifying elements may be provided on one, several, or all of the blades of the paddle wheel.
  • all of the dust flow-changing elements are arranged on the respective forward in the direction of movement or drive of the blade / impact wheel side or on the baffle of the respective blades.
  • One, several or all projections designed as a dust flow change element can be mirror-symmetrical with respect to exactly one plane, or with respect to exactly two mutually perpendicular planes or with respect to exactly three mutually perpendicular planes. It can also be provided that such a projection is mirror-symmetrical with respect to any plane. It should be noted that the features mentioned with respect to a projection formed as a dust flow change element may each relate to one, several or all such projections. Combinations of various embodiments mentioned in the context of this disclosure are also preferred.
  • the dust-flow change element designed as a projection is designed such that it forms at least one edge immediately adjacent to a blade surface, which has a defined beginning and a defined end. It can be provided that such an edge is straight.
  • a trained as a projection dust flow changing element may for example be wedge-shaped.
  • a dust flow change element designed as a projection is rod-shaped.
  • Such a bar shape may in particular be such that its length is a multiple, for example at least three times or at least five times or at least ten times or at least twenty times its width given transversely to the length.
  • the height of such a rod-shaped projection which is substantially perpendicular to the blade surface, may be such that the length of this rod-shaped projection is a multiple of the height, for example at least three times or at least five times, or at least ten times or at least twenty times.
  • a dust-flow change element designed as a projection is straight, in particular in its longitudinal direction.
  • the height of a dust flow change element formed as a protrusion disposed on a blade surface is understood to mean the amount in the normal direction, that is, the amount by which this protrusion protrudes from the blade surface.
  • a dust-flow change element designed as a projection can be designed, for example, rectangular or wedge-shaped or trapezoidal or semicircular. It can be provided that a dust-flow change element designed as a rod-shaped projection encloses an angle with an axis parallel to the axis of rotation of the blade wheel, which angle is between 5 ° and 90 °, preferably between 10 ° and 80 °, preferably between 20 ° and 70 ° ,
  • a dust flow altering element designed as a projection may be such that it operates during operation of the mill device during the life of the mill device or changed during the life of the blades of the blade wheel of this mill device its shape.
  • the advantage of such a design may be that is changed by the change in shape of such a dust flow change element, the deflection of Mahlgutstaubs over the lifetime, so that the Mahlgutstaub for the purpose of uniform wear or a more uniform Abration at the same flow over the life different areas is steered.
  • the mentioned change in shape can be effected, for example, by material selection and / or shape design of the dust flow change element.
  • the dust flow-changing element can, in particular for this purpose, for example, metal, such as steel or cast iron or light metal, be.
  • the radially inward edge of the blades of the blade wheel extends substantially parallel to the axis of rotation of the blade / impact wheel and extends over the entire width of the blade, wherein formed as a projection dust flow change element between this extending over the entire width radially provided inside edge of the blade and the radially outer edge of the blade.
  • the radially inward edge of the blades of the blade / impact wheel can, for example, also extend in the axially inner region substantially parallel to the axis of rotation of the blade wheel and run obliquely radially outward on both sides.
  • the mill means may be, for example, a lignite mill, and in particular a distributor-blower mill or DGS mill, or an N or NV mill.
  • the mill device according to the invention can be part of a lignite power plant, for example.
  • the mill device according to the invention can be part of a lignite power plant, for example.
  • ground material which may be, for example, raw lignite coal
  • a carrier and / or flue gas is introduced into the device.
  • the ground material is pre-comminuted in an intermediate stage, which may also be referred to as a grinding stage or impact stage, before it is introduced into the blade / impact wheel provided with the dust flow-changing element.
  • a preliminary comminution is provided in several or in all grinding or crushing stages.
  • the dust flow change element is formed as a projection and so on the relevant regrind, which is commonly used in the mill device tuned that this projection in operation of the mill device during the life of the impeller changes its contour, so in that the flow path of the dust is changed in a different manner by the changed contour of the projection, in order thus to reduce erosion peaks and / or wear peaks of the blade wheel for extending the service life of the blade wheel. In other words, a more even distribution of erosion or wear is achieved over the lifetime.
  • a dust flow-changing element according to the invention is adjustable, so a trained as a projection dust flow-changing element can be repositioned with respect to its position.
  • the dust flow-changing element is detachably arranged.
  • the dust flow-changing element is provided insoluble, and is welded, for example.
  • the shaft may be, for example, water and / or air cooled.
  • the coal power plant shown has a mill device 2 according to the invention, which in the present example comprises a blade / impact wheel 3.
  • the blade / impact wheel 3 is designed here as a fan and has in addition to a suction or blowing function a crushing or grinding function for regrind This can be coal, such as lignite, for example.
  • the mill device 2 further comprises a housing 5, and a shaft 10, which is mounted for example via suitable bearings 12 and 13.
  • the shaft 10 is equipped, for example, with the impact tool 4.
  • a plurality of circumferentially distributed racket arms 18, which extend substantially in the radial direction, each held, each racket arm 18 is provided radially outwardly with a racket.
  • the rotor 16 axially offset a plurality of arrangements of a plurality of circumferentially distributed arranged racket arms 18, 20, 22, 24, 26 carries, each of these racket arms 18, 20, 22, 24, 26 club heads 28, 30, 32, 34, 36 carries.
  • the radial outer dimensions of the racket arms 18, 20, 22, 24, 26 with the rackets heads 28, 30, 32, 34, 36 arranged thereon are different in the axial direction, wherein for each axial position the racket arms 18, 20, 22, 24, 26 with club heads 28, 30, 32, 34, 36 arranged thereon each have substantially the same external radial dimensions.
  • the impact tool 4 has primarily a comminuting or grinding function for the ground material, which is effected in particular by the impact of the racket arms 18, 20, 22, 24, 26 on the supplied material to be ground, optionally in cooperation with a circumferentially radially around the Club arms 18, 20, 22, 24, 26 with the club heads 28, 30, 32, 34, 36 arranged thereon extending housing portion which may be designed stepped.
  • the mill device 2 further has a mill inlet 38, via which gas, in particular flue gas, which is supplied for example from a combustion chamber, which is part of the coal power plant, together with ground material, in particular lignite, is supplied.
  • gas in particular flue gas
  • the gas which is referred to below as simplifying flue gas, can have a drying function and a carrier function for the regrind. Accordingly, the flue gas may also be referred to as a carrier gas or as a drying gas.
  • the flue gas can, for example, a suitable, in Fig. 1 not shown, to be fed line system.
  • the mill device 2 with a drive device, such as motor, for the shaft 10 and thus the paddle wheel 3 and the impact tool 4 is provided. Between this drive device and the shaft 10 may be provided a suitable transmission. Furthermore, what is in Fig. 1 not shown, be provided between the first paddle wheel 3 and the impact tool 4, a suitable transmission gear or reduction gear. However, these two parts 3, 4 can also be arranged together rotatably on the shaft 10 be such that they turn into operation at the same speed.
  • the blade / impact wheel 3 is designed as a fan.
  • the Lüfterrad- or fan housing 40 may for example be formed spirally, which is made Fig. 1 difficult to remove, since the spiral formation is provided perpendicular to the image plane.
  • the fan 3 has a hub disc 42 and a Radringsay 44, which are axially spaced from each other. Shown in Fig. 1 is that the Radringsay axially facing the upstream in the direction of flow of the ground material impact tool 4, while the hub disc 42 facing away from said striking wheel 4 axially. In the radially outward region of the disks 42, 44, these are connected to one another via a multiplicity of blades 46 distributed around the circumference.
  • These two-part blades 46 may, for example, as in the Fig. 2 and 3 shown, each having a blade plate 50 and a blade 48, which are integrally formed. It is provided in particular that the blade 48 is arranged radially outside the blade plate 50.
  • the blades 46 may e.g. 1-piece or 2-piece or 3-piece etc. be executed.
  • One, several or all of the blades 46 are provided on their front in the direction of rotation of the blade wheel 3 side with one or more dust flow change elements, which are designed here as a projection. Examples of the design and arrangement of such dust flow alteration elements 52 are shown in FIGS Fig. 2 and 3 shown.
  • the dust flow changing elements 52, 56, 58, 60, 62 are at one Longitudinal side surface of a blade 46, which forms the baffle surface of the blade 46, formed and project from the longitudinal side surface into the space between two adjacent blades 46.
  • raw lignite and flue gas is supplied.
  • the raw lignite and the flue gas reach the impact tool 4 and are pre-shredded there by means of its bat 28, 30, 32, 34, 36, which are also referred to as a club head.
  • This pre-shredding can, for example, be such that 60% of the comminution takes place here or in the racket part (club heads, grinding track). This can be done by means of the club heads and a surrounding grinding track of a grinding plant.
  • the thus pre-shredded ground material continues to flow together with the flue gas and enters axially into the impeller 3. By means of the blades 46 of the fan 3, the material to be ground is further crushed.
  • the dust flow changing elements 52 are also referred to as dust deflectors.
  • the dust flow altering elements 52 are preferably formed with edges, in particular sharp edges. The blades form an impact side of the coal which is the forward side of the respective blade in the direction of rotation.
  • the fan 3 promotes enriched with ground coal dust or raw coal flue gas in dust lines, which are not shown in detail.
  • said pulverized coal or raw coal with the flue gas emerges essentially radially outward from the fan wheel 3 or the spiral-shaped housing.
  • the impeller 3 and the impact tool 4 may be mounted on the shaft seat of the rotor shaft or shaft 10. It can be provided that the blades 46 are in the direction of rotation in front of spacers or webs, which are thereby protected from wear.
  • the blades 46 of the fan wheel 3 which consist in particular of a blade plate 50 (inner blade) and blade 48 (outer blade), are made of sheet metal or as a cast part and are mounted in the blade wheel 3.
  • the blades 46 are to distribute the coal as evenly as possible on the entire blade plate width and crush the coal by impact, and promote the coal and the flue gas in the dust lines.
  • the comminution of the coal takes place on the blade surfaces and / or on the blade edges, so that they are generally subjected to a special wear, which is mitigated by the invention, however.
  • the dust flow changing elements 52 which are designed as a projection, a uniform distribution of the coal over the entire plate width of the blade 46 is now achieved. It can be provided that the blades 46 are provided with variable dust deflectors or projections 52 mounted on the blade surface. These cause an improved possibly even maximum coal throughput with optimal or significantly improved wear of the blade parts and the wear parts of the fan housing. Variables may be these dust flow modifying elements in that they are adjustable and / or in that they may be designed differently depending on the blade and operating conditions and / or design of the mill device.
  • the wear of the blade 46 is evened out and, in terms of its setting, significantly extended.
  • the distribution of carbon dust on the following dust lines is significantly improved, if not even optimized.
  • the flow direction of the conveyed coal dust across the blade surface may be different so that dust deflectors or flow elements 52 should be placed variably (see above). This can in particular be such that different positions or designs of these dust flow change elements are selected for different types or sizes of mill.
  • the flow direction of the ground coal over the surface of a blade 46 is influenced by the raw lignite coal to be ground, the mill installations and the process technology. Dust flow change elements in the rectangular profile can be used, for example, if the blade surface wears only proportionally, and / or deep indentations occur in the blade material. However, each blade notch is a danger to the mill and shortens the mill operation by early change of wearing parts. With dust deflectors or dust flow change elements or projections 52 in the rectangular profile that are variably placed over the blade surface, the pulverized coal is directed in the desired direction and the life of the blade improved or even optimally used.
  • the main coal dust flow immediately into the area of the wheel ring 44 or wheel hub 42 in the fan 3, it can be deflected to the blade surface arranged on the wedge-shaped dust deflector (triangular shape) or dust flow change elements or projections 52 to the blade center, if they are provided.
  • the counter-effect begins when these dust deflectors or dust flow change elements or projections 52 wear out in mill operation; then the pulverized coal is again transported outwards in the direction of the wheel disks, namely wheel ring disk 44 or wheel hub disk 42.
  • the blade surface wears evenly or significantly more uniformly.
  • the mill device or lignite mill can basically also be designed as a DGS or N or NV mill.
  • the wheel ring 44 and the hub disc 42 are outwardly protected by wear plates 54 against wear. Further, in the transition between the blade 46 and the Radringsay 44 as well as in the transition between the hub disc 42 and the blade 46 each have a Schl constitutionwinkel 55 is provided for Radalintik.
  • the blade 46 or its blade plate is formed with dust flow change elements 52, which are designed as a projection.
  • Such protrusions 52 may be arranged completely or at least on the blade surface, and between adjacent blades 46.
  • one to five dust flow changing elements 52 may be provided on each of the blades, although different numbers are possible.
  • the positioning or placement of the dust flow change elements 52 varies in particular depending on the configuration and can be set as optimally as possible from experience.
  • dust flow change elements 56 are mounted or fixed in the rectangular profile on the surface of the blade 46 and can be designed with various installation lengths.
  • a first dust flow modifying element 56 and a second dust flow modifying element 58 are provided.
  • the location of the dust flow altering elements 52 may be from the center of the blade to the outer edge of the blade.
  • the thickness or width a of the dust flow changing elements 52 is between 20 mm and 150 mm and that their height (perpendicular to the blade 48 and 59) is between 10 mm and 200 mm.
  • the deflection angle c or the angle between the second dust flow change element 58 and the axis of rotation of the blade wheel 3 can, for example, be between 5 ° and 90 °, which incidentally also applies to the dust flow change element 56.
  • the dimension L1 between the dust flow change element 56 and the distance dust flow change element 58 may, for example, be between 0 mm and up to the annular disk 44.
  • the dimension L2 which in particular indicates the distance between the here radially aligned dust flow-changing element 56 and the hub disc 42, may be between 0 mm and the distance to the center of the blade.
  • Fig. 3 shows a further embodiment of an exemplary fan 3 in a partial schematic representation.
  • the design according to Fig. 3 differs from the design according to Fig. 2 in particular by the arrangement of the dust flow change elements 52, so that the description of the Fig. 3 should be limited to this and incidentally to the description Fig. 2 is referenced.
  • two dust flow changing elements 60, 62 are provided, which are designed in the triangular profile or in the spline profile and may have different dimensions.
  • the placement or positioning of these dust flow changing elements 60, 62 can vary and take place according to experience.
  • the dust flow change elements 60, 62 may be integrated into the respective wear angle 55.
  • the location of the dust flow modifying elements 60, 62 may be, for example, from the center of the blade to the outer edge of the blade or distributed over the entire length L3.
  • the deflection angle or angle c can be, for example, between 5 ° and 70 °. This is the angle between the slopes of the third and fourth dust flow changing elements 60 and 62 and a parallel to the axis of rotation of the fan wheel 3.
  • the thickness a of the dust flow changing element may be, for example, between 20 mm and 150 mm.
  • the length e of the dust flow changing element which extends by way of example in the radial direction, may for example be between 10 and 250 mm.
  • the dust flow modification elements according to the invention can be subsequently introduced into existing lignite mills or their paddle wheels.
  • the invention is also suitable, at least in preferred embodiments, for improving the grinding, as tests have shown.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Crushing And Grinding (AREA)
EP11154552A 2010-02-15 2011-02-15 Dispositif de broyage doté d'un élément de modification du flux de poussière Withdrawn EP2363208A3 (fr)

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DE201010008107 DE102010008107A1 (de) 2010-02-15 2010-02-15 Mühleneinrichtung mit einem Staub-Strömungsveränderungselement

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EP2363208A2 true EP2363208A2 (fr) 2011-09-07
EP2363208A3 EP2363208A3 (fr) 2012-05-30

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CN112090549A (zh) * 2020-07-22 2020-12-18 神华国能集团有限公司 磨煤机

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DE102012000510A1 (de) 2012-01-13 2013-07-18 Neolase Gmbh Nichtregenerativer optischer Verstärker
CN115888906B (zh) * 2022-12-05 2024-10-22 四川中哲新材料科技有限公司 一种锰片磨粉除尘一体化设备

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DE1984772U (de) 1966-10-14 1968-05-02 Hoechst Ag Werkzeug zum extrudieren von hohlprofilen aus thermoplastischen kunststoffen.
DE4412924A1 (de) 1994-04-15 1995-10-19 Lentjes Kraftwerkstechnik Schlagradmühle

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DE19835144C2 (de) * 1998-08-04 2001-12-13 Pallmann Kg Maschf Gasdurchströmte Zerkleinerungsmaschine mit rotierendem Schlagradsystem
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DE1984772U (de) 1966-10-14 1968-05-02 Hoechst Ag Werkzeug zum extrudieren von hohlprofilen aus thermoplastischen kunststoffen.
DE4412924A1 (de) 1994-04-15 1995-10-19 Lentjes Kraftwerkstechnik Schlagradmühle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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