EP3815789A1 - Broyeur à boulets à agitateur - Google Patents

Broyeur à boulets à agitateur Download PDF

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Publication number
EP3815789A1
EP3815789A1 EP20202007.9A EP20202007A EP3815789A1 EP 3815789 A1 EP3815789 A1 EP 3815789A1 EP 20202007 A EP20202007 A EP 20202007A EP 3815789 A1 EP3815789 A1 EP 3815789A1
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EP
European Patent Office
Prior art keywords
agitator
shaft
flanges
section
protection sleeve
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.)
Granted
Application number
EP20202007.9A
Other languages
German (de)
English (en)
Other versions
EP3815789B1 (fr
Inventor
Udo Enderle
Thomas GOLLER
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.)
Netzsch Feinmahltechnik GmbH
Original Assignee
Netzsch Feinmahltechnik 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.)
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Application filed by Netzsch Feinmahltechnik GmbH filed Critical Netzsch Feinmahltechnik GmbH
Publication of EP3815789A1 publication Critical patent/EP3815789A1/fr
Application granted granted Critical
Publication of EP3815789B1 publication Critical patent/EP3815789B1/fr
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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
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/163—Stirring means

Definitions

  • the invention relates to an agitator mill with a grinding chamber containing a grinding body, with an agitator shaft, a shaft protecting sleeve and several agitator bodies according to the preamble of claim 1 or a system for equipping such an agitator mill according to the preamble of claim 11.
  • the invention also relates to a method for equipping such an agitator mill with such a system according to the preamble of claim 13.
  • agitator mill 1 with a horizontal agitator shaft 3 is shown schematically.
  • the grinding bodies fill the volume of the grinding space 7, which is available without any internals, preferably to at least 70%, better at least 90%.
  • the material to be ground is pumped into or through the grinding chamber 7 enclosed by the grinding container 2 via the inlet 5 of the agitator mill 1.
  • the material to be ground is solid particles dispersed or suspended in a liquid, in particular water.
  • the suspension or dispersion is pumped continuously through the grinding chamber. However, it can also be fed to the agitator mill in batches.
  • such an agitator mill can also be used for dry grinding. It can then be designed, for example, as an agitator mill with a vertical shaft through which the material to be ground is carried by a gaseous fluid, for example, usually in a downflow.
  • the present invention in its broadest aspect relates to both types of agitator mills. However, their use is very particularly preferred in agitator mills with a horizontal agitator shaft.
  • the agitator shaft 3 can be driven by an electric motor 9 via a belt drive 10, for example.
  • the drive of the agitator mill 1 is usually located in a housing 11 adjoining the grinding container 2.
  • the grinding bodies are set in motion by the movement of the stirring bodies 8.
  • the movement of the respective grinding media which in most cases causes the grinding media to revolve completely around the agitator shaft, is mostly a chaotic movement.
  • a grinding body entrained by the stirring bodies in the circumferential direction often has an individual translational movement component on which an intrinsic rotation about the center of the respective grinding body is superimposed.
  • the individual translational movement component often also has an at least temporary component in the direction along the longitudinal axis of the agitator shaft, for example when the agitator bodies are provided with windows through which the grinding body can move from one chamber to the next.
  • the grinding stock and grinding media are separated by means of a suitable separation system.
  • suspended particles can be comminuted down to the range with mean fineness (grain sizes) of ⁇ 50 nm.
  • a separation system 4 for example in the form of a sieve or a filter, is also attached in front of the outlet 6.
  • an agitator mill which has an agitator shaft on which a plurality of disk-shaped agitator bodies are mounted, which are arranged at an axial distance from one another.
  • Each individual agitator body consists of several disc segments, each of which has an axial opening and which are screwed to the agitator shaft or to a hub attached to the agitator shaft by means of screw connections.
  • the threaded bores in the shaft or the hubs run in the radial direction.
  • the screws for fastening the disk segments are pushed through radial counterbores in the disk segments and screwed to the threads in the hubs or the shaft.
  • the through-countersunk bores run from the axial opening of the disk segments to the surface of the respective disk segment that rests on the shaft or the hub in the assembled state.
  • the disks in the area of the counterbore which ultimately has a not inconsiderable notch effect, must not fall below a certain material thickness. In order to ensure sufficient safety, this applies both in the axial and in the radial direction. Under certain circumstances, this leads to an undesirably large construction of the agitator body.
  • the object of the invention is to provide a means with which the manufacturing and assembly costs of an agitator mill as well as the space required for the agitator body, not least in the radial direction, can be reduced.
  • the problem is accordingly solved with an agitator mill with a grinding chamber containing grinding media and an agitator shaft rotating therein during operation.
  • the agitator shaft carries a shaft protection sleeve rotating with it and several disks connected in a non-rotatable manner to the shaft protection sleeve in the broader sense. These form the so-called agitator bodies, which are hereinafter referred to as disk-like agitator bodies.
  • the agitators set the grinding media in motion.
  • the agitator mill according to the invention is characterized in that the protective shaft sleeve is divided into several sleeve sections. The sleeve sections each have a flange at their front end.
  • the disk-like agitator bodies have a mostly annular disk-shaped coupling section with two opposing coupling ring surfaces.
  • This Coupling section is in the center of the agitator. It immediately borders the free central area of the agitator through which the agitator shaft passes.
  • the coupling section is held between the flanges of a preceding and a following sleeve section, as a rule in a sandwich-like manner, viewed in the direction along the axis of the agitator shaft. As a rule, the holding takes place in such a way that each of the coupling ring surfaces rests against a flange that is axially opposite to it, mostly over the entire surface.
  • a non-rotatable connection is created between the flanges and the disk-like stirring body, in that the stirring body, more precisely its coupling section, and the flanges are penetrated by pins.
  • the pins are positioned with their pin longitudinal axis essentially parallel to the axis of rotation of the agitator shaft.
  • a first sleeve section of the shaft protection sleeve is first pushed onto the agitator shaft.
  • a first agitator body is then pushed onto the agitator shaft until one of its two coupling ring surfaces rests on the flange of the first sleeve section.
  • a form fit is generated in the radial direction between each pin and each hole provided for this purpose in the stirring body.
  • the pins are ideally attached to the flange of the first sleeve section, usually permanently by welding. A rotationally fixed connection is thus created between the stirring body and the flange of the first sleeve section.
  • the next sleeve section is then pushed onto the agitator shaft until its flange rests on the second coupling ring surface of the agitator body.
  • the second flange with its bores provided for this purpose is also attached to the pins attached to the flange of the first sleeve section postponed.
  • the second sleeve section is thus connected to the stirring body in a rotationally fixed manner.
  • This process can then be repeated until the desired number of sleeve sections and agitators have been pushed onto the agitator shaft.
  • the pins for creating a rotationally fixed connection do not necessarily have to be attached to the flange of the respective first sleeve sections of the shaft protective sleeve. It is also conceivable to attach the pins to the flange of the second sleeve section, while the first flange is equipped with the holes complementary to the pins. Another possibility is to attach or fix the pins as pins protruding on both sides on the agitator bodies and to equip the flanges of the sleeve sections adjoining the agitator body with associated bores, which takes better account of the principle of identical parts. Another option, which is usually too cumbersome for assembly, is to equip both flanges and the agitator body in between with holes and to guide the pins through the holes only after the shaft sleeves and agitator bodies have been assembled.
  • the sleeve sections lying between the first and the last sleeve section ideally each have a flange at both axial ends.
  • the pins for creating a rotationally fixed connection with a stirring body and a subsequent sleeve section are ideally attached to a flange, while it is ideal to equip the other flange with bores into which the pins of the previous sleeve section pushed through the stirring body can be inserted.
  • the flanges are ideally attached to the sleeves by welding.
  • pens have decisive advantages.
  • the flanges can be perfectly positioned relative to one another and, together with their sleeve sections, connected in a form-fitting manner to form a quasi "monolithic" block. Pinning is better and easier than using through bolts. This also applies in particular to large agitator mills, where noticeable tolerances can occur between the key, which then turns out to be very large, and the keyway in the respective flange.
  • the pin solution according to the invention has the advantage that it is absolutely flush with the surface compared to the use of through-bolts with nuts that protrude into the grinding chamber and form obstacles there that may wear out under constant "bombardment" of the grinding media.
  • it eliminates the need for the complex production of a large number of threaded holes in the flanges and / or the agitators.
  • the individual components of the protective shaft sleeve and the individual agitator bodies can be easily or quickly mounted on the agitator shaft with such a construction. To do this, they just have to be pushed onto the agitator shaft one after the other.
  • the assembly is essentially tool-free.
  • Another advantage of an agitator mill designed according to the invention is that the radial ends of the flanges move closer to the center of the shaft. This means that the flanges, which previously had to be more voluminous than the pure agitator bodies, are smaller. As a result, the part of the grinding chamber that does not have any internals becomes larger. This ultimately leads to an increase in the usable grinding space.
  • the agitator bodies are not connected to the flanges by means of a radial screw connection, the further advantage can also arise here that the necessary radial and axial wall thickness of the agitator bodies may also decrease. This also leads to a productivity-improving enlargement of the built-in free volume that the grinding chamber has.
  • the term “tool-free” describes that the individual components are designed in such a way that, in principle, no hand tools are required for assembly. However, it is not ruled out that a hammer may be used for easier joining, for example, of the pins into the drill holes. The use of a crane for correspondingly large or heavy components is also not excluded. It is also conceivable that before and after the installation of the protective shaft sleeve and agitator body on the agitator shaft, tools are required to prepare the agitator shaft for assembly, for example to secure the position of the first and last sleeve section to mount axial stops on the agitator shaft.
  • grinding media denotes the bodies located in the grinding chamber of the agitator mill, which cause a comminution of the material to be ground fed to the agitator mill during operation. Usually these are steel, glass or ceramic balls.
  • disk-like agitator describes that the geometry of the agitator is or essentially a cylinder whose diameter exceeds the maximum thickness in the direction of its longitudinal axis by at least a factor of 1.5, better by a factor of at least 3.
  • the thickness of the stirring body does not have to run uniformly over the entire diameter.
  • the agitator bodies in addition to the opening with which they are pushed onto the agitator shaft or the shaft protective sleeve, can have further window-like openings extending in the axial direction.
  • pins fix the pins in the direction of their pin longitudinal axis on only one of the two flanges. This is preferably done by welding the pins to the corresponding flange.
  • the pin openings on the other of the two flanges are designed in such a way that pushing the pins into these pin receiving openings results in a fit that can be joined by hand. This is preferably a transition fit according to ISO 286.
  • the agitator bodies therefore only have to be pushed onto the agitator shaft or onto a sleeve section of the shaft protective sleeve until they rest with their coupling ring surface on the flange of the sleeve section.
  • a rotationally fixed connection was established between the agitator body and the sleeve sections.
  • the agitator is also secured axially. Since the pins have already been fixed to the flange of the first sleeve section and the fit between the pins and the bores provided for this in the flange of the second sleeve section are transition fits, tool-free assembly of the agitator bodies and sleeve sections on the agitator shaft is ensured.
  • each stirring body is centered on at least one of the flanges holding it by means of an annular shoulder formed on it.
  • the centering is preferably carried out by positive interaction between the outer circumferential surface of a flange of a sleeve section and the said annular shoulder.
  • the agitator shaft 3 has at least one, better still at least two, driver strips.
  • the driver bars are preferably each designed as or in the manner of a feather key, which is spoken of as a representative in the following. They usually go through from the first to the last sleeve section. The sleeve sections are entrained in the direction of rotation through positive interaction of the feather keys with the corresponding driving grooves of their two flanges.
  • the at least one feather key can be either in one piece or composed of several pieces. If it is composed of several pieces, an axial distance between the individual sections is also conceivable. In this case, however, the feather keys are preferably always attached to the agitator shaft in such a way that the sleeve sections can be pushed into their end position in one go without realignment along the agitator shaft. Therefore, in the case of a multi-part design, the individual sections of the key must be aligned.
  • the at least one feather key is ideally installed in the agitator shaft without play.
  • the bar is preferably installed on the agitator shaft by pressing or screwing it to the agitator shaft.
  • Each agitator is preferably an annular disc that is closed in the circumferential direction and not just a slice of pie-like disc sector, which tends to favor the (problem-free) transmission of higher torques to the respective agitator.
  • This is ideally a one-piece cast disc.
  • each agitator body can be pushed onto a flange as a whole, the flange receiving the agitator body first preferably already being equipped with the required pins. As soon as the second flange has been positioned, the agitator body has a firm hold simply by pushing the components together, without the need for a screw connection in the flange area.
  • the production of the agitator bodies by a casting process is particularly useful when window-like openings are to be provided in the agitator bodies and large components are involved, since no waste is produced in the casting process. As a result, material can be saved.
  • each agitator body has a coupling shoulder adjoining its inner radius, which is pierced on both sides from the end faces.
  • the coupling shoulder is accordingly a section of the stirring body which, measured in the direction along the axis of rotation of the stirring shaft, is thinner than the non-pierced section of the stirring body.
  • the surfaces of the coupling shoulders facing the flanges of the sleeve sections in the assembled state of the agitator are the aforementioned annular coupling surfaces of the agitator in question.
  • each stirring body is completely accommodated between the flanges of two immediately adjacent sleeve sections.
  • the axial positioning of the sleeve sections and their flanges is thereby ensures that the first sleeve section of the shaft protective sleeve pushed onto the agitator shaft rests positively against a first axial stop.
  • the last sleeve section pushed onto the agitator shaft lies positively against a second axial stop.
  • the second axial stop acts in the opposite axial direction as the first axial stop.
  • Each further sleeve section lying between the first and the last sleeve section is preferably not fixed directly to the agitator shaft in the axial direction. Rather, for the sake of simplicity, the axial fixing of the intermediate sleeve sections is ideally done indirectly, with the aid of sleeve sections that are adjacent on both sides.
  • the first sleeve section of the protective shaft sleeve is pushed over the agitator shaft until it rests against a first axial stop. This means that the sleeve section can only slip axially in one direction.
  • the further sleeve sections and the agitator bodies are then pushed onto the agitator shaft one after the other. After the last sleeve section is in the desired position on the agitator shaft, a further axial stop is finally attached to the agitator shaft. In the assembled state, this prevents the sleeve section last pushed onto the agitator shaft from slipping in the direction from which it was pushed onto the agitator shaft. Since the individual sleeve sections and agitator bodies all axially adjoin one another, all sleeve sections and agitator bodies are prevented from slipping axially along the agitator shaft.
  • one of the axial stops or both axial stops is not designed as a shaft shoulder, a tool may have to be used to help assemble the axial stop.
  • the sleeve sections, their flanges and preferably also the exposed surfaces of the stirring bodies are provided with a coating.
  • the coating has a friction-increasing effect. It usually also has a dampening effect on the impact of the falling grinding media.
  • it is a coating made of rubber or an elastomer, ideally a soft elastomer.
  • the coated surfaces of the protective shaft sleeve are preferably those that come into contact with the grinding media during operation of the agitator mill. Since the coating ideally increases the friction of the coated surfaces, the grinding media in contact with the corresponding surfaces are set in motion more effectively. The grinding process is thus optimized.
  • free surfaces preferably describes those surfaces which are directly accessible to the grinding media on the grinding chamber side.
  • An agitator mill of this type has a grinding chamber and an agitator shaft which revolves in operation and is to be protected from the direct action of the grinding media.
  • the system according to the invention for equipping the agitator mill consists of a multi-part protective shaft sleeve with several sleeve sections, each of which has a flange at its end, as well as pins and agitators.
  • each stirring body has a coupling ring surface which can be installed between the flanges of a preceding and a subsequent sleeve section.
  • the non-rotatable connection between the flanges and the disk-like agitator body takes place in such a way that the agitator body and the flanges are penetrated with pins.
  • the pins are positioned with their pin longitudinal axis completely or at least essentially parallel to the axis of rotation of the agitator shaft.
  • the system achieves a simplified repair of such agitator mills in which the protective shaft sleeve and the agitator bodies attached to it have to be renewed due to wear.
  • the system then realizes the same advantages as mentioned above for the agitator mill according to the invention as a whole.
  • the surfaces of the system for equipping an agitator mill which come into contact with the grinding media in the assembled state, are provided with a coating.
  • the coating ideally has a friction-increasing or damping effect. It corresponds to the one described above.
  • the aforementioned problem is solved with a method for equipping an agitator mill with a grinding chamber containing grinding media and a stirring shaft rotating therein with stirring bodies which are set in rotation by the stirring shaft.
  • the method is characterized in that the assembly is carried out by first pushing a first sleeve section of the shaft protection sleeve onto the agitator shaft until it rests positively on an axial stop.
  • the first sleeve section is pushed onto the agitator shaft in such a way that, in the assembled state, it is connected to the agitator shaft in a rotationally fixed manner via a strip of the agitator shaft that functions as a feather key.
  • a first stirring body is then pushed onto a section or flange of the first sleeve section facing away from the axial stop.
  • the first stirring body is connected to the first sleeve section in a rotationally fixed manner by means of pins which are attached to the flange of the first sleeve section facing away from the axial stop.
  • Any number of further sleeve sections and stirring bodies can then be mounted on the stirring shaft in the same way as the first stirring body and sleeve section.
  • One sleeve section serves as an axial stop for the subsequent sleeve section.
  • An additional axial stop only needs to be attached to the side facing away from the first sleeve section on the agitator shaft for the sleeve section installed last.
  • Fig. 2 the end face of a sleeve section 17 is shown, which is formed by the flange 20 thereof.
  • the flange 20 is designed here as a "hole flange" for inserting pins.
  • Such a sleeve section 17 is pushed onto an agitator shaft until the flange 20 rests against an agitator body 12 which is also mounted on the shaft.
  • the two driving grooves 23 of the flange 20 enter into a form fit with the driving bar of the agitator shaft, so that a rotational movement of the agitator shaft is transmitted to the sleeve section 17.
  • the structures are centered with respect to the central agitator shaft, as a rule, via the flanges 19, 20, which position with the inner circumferential surface of their central opening against the The circumferential surface of the agitator shaft, not shown here.
  • the flange 20 of the sleeve section 17 has a plurality of pin receiving openings 22.
  • the pins 21 of the flange of a preceding shaft sleeve section protrude into the pin receiving openings 22.
  • a flange 19 opposite the flange 20 in the assembled state is shown in the sectional view.
  • the flange 19 is designed here as a "pin flange"; it carries pins 21, which are preferably fixed to it from the start.
  • the flange 19 also lies on the in FIG Fig. 3 stirring body 12, not shown.
  • the flange 19 also has two driver grooves 23 which form a form fit with the driver strip of the agitator shaft.
  • a sleeve section 17 is shown in longitudinal section.
  • the sleeve section 17 consists of a sleeve 29 and the two flanges 19 and 20 which - for example by means of the weld seams 26 - are attached to the front ends 18 of the sleeve 29.
  • the sleeve section 17 is provided with a coating or rubber coating 24.
  • the coating on the sleeve section 17 primarily has the function of dampening impact impacts from grinding bodies that strike when falling.
  • a secondary function of the coating can also be to improve the friction between the grinding bodies in the grinding chamber and the sleeve section in order to improve the entrainment of the grinding bodies.
  • the sleeve 29 of the sleeve section 17 does not bear directly on the agitator shaft protected by it, but rather forms an annular gap opposite it.
  • the sleeve section of the shaft protecting sleeve is prevented under all circumstances from directly passing on forces acting on it or impacts of falling grinding media to the agitator shaft.
  • the free movement of the sleeve section with respect to the agitator shaft is retained even after a long period of use, so that the sleeve section can always be replaced without any problems (without jamming) in the course of an overhaul of the mill.
  • a stirring body 12 is shown. This has several window-like openings 28 here. These breakthroughs can be used to enable the grinding stock flow to flow better from one grinding chamber between two agitators to the next grinding chamber. They may also increase the dragging of the grinding media.
  • the coupling section encompassing or bordering the central opening of the stirring body forms a coupling ring surface 13 facing the viewer and an annular shoulder 14 at its radially outer end.
  • the agitator body 12 rests axially against at least one of the flanges 19 or 20 with the coupling ring surface 13.
  • the centering takes place ideally via the inner circumferential surface 14 of the coupling section 13 (cf. Fig. 6 ), which then sits on the outer lateral surface 25 of a flange 19 or 20 (cf. Fig. 4 Several pin receiving openings 15 are provided in the coupling section.
  • the pins 21 of the "pin flange" 19 are pushed into this (if one is preferably used) in order to connect the stirring body 12 to the shaft sleeve in a rotationally fixed manner.
  • the stirring body here consists of an inner metal frame 27, which is of a rubber coating 16 is surrounded.
  • This coating 16 also serves to increase the friction between the stirring body 12 and the grinding bodies located in the grinding chamber and, here mostly only secondary, possibly also to dampen impact impacts.
  • the coating is ideally designed so that it can be stripped and renewed when worn, which optionally leads to a corresponding use of the stirring body 12.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Grinding (AREA)
EP20202007.9A 2019-10-31 2020-10-15 Broyeur à boulets à agitateur Active EP3815789B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019129467.3A DE102019129467A1 (de) 2019-10-31 2019-10-31 Rührwerksmühle

Publications (2)

Publication Number Publication Date
EP3815789A1 true EP3815789A1 (fr) 2021-05-05
EP3815789B1 EP3815789B1 (fr) 2022-06-29

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ID=73013131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20202007.9A Active EP3815789B1 (fr) 2019-10-31 2020-10-15 Broyeur à boulets à agitateur

Country Status (5)

Country Link
EP (1) EP3815789B1 (fr)
AU (1) AU2020257028B2 (fr)
DE (1) DE102019129467A1 (fr)
ES (1) ES2926287T3 (fr)
PT (1) PT3815789T (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114893975A (zh) * 2022-03-01 2022-08-12 宁夏链杞智汇科技有限公司 一种无碱枸杞干燥机能量回收循环利用装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD272805A1 (de) * 1988-06-02 1989-10-25 Freiberg Bergakademie Hochverschleissfestes ruehrwerk fuer eine ruehrwerksmuehle
DE10219482A1 (de) 2002-04-30 2003-11-20 Netzsch Feinmahltechnik Rührwerksmühle
US20040124296A1 (en) * 2002-12-31 2004-07-01 Precision Machinery Wet grinding and dispersion apparatus
CN207287618U (zh) * 2017-07-31 2018-05-01 浙江华宝油墨有限公司 一种研磨筒转子

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017003318U1 (de) * 2017-06-23 2017-08-01 Hosokawa Alpine Aktiengesellschaft Rotor für Rührwerksmühlen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD272805A1 (de) * 1988-06-02 1989-10-25 Freiberg Bergakademie Hochverschleissfestes ruehrwerk fuer eine ruehrwerksmuehle
DE10219482A1 (de) 2002-04-30 2003-11-20 Netzsch Feinmahltechnik Rührwerksmühle
US20040124296A1 (en) * 2002-12-31 2004-07-01 Precision Machinery Wet grinding and dispersion apparatus
CN207287618U (zh) * 2017-07-31 2018-05-01 浙江华宝油墨有限公司 一种研磨筒转子

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114893975A (zh) * 2022-03-01 2022-08-12 宁夏链杞智汇科技有限公司 一种无碱枸杞干燥机能量回收循环利用装置

Also Published As

Publication number Publication date
AU2020257028B2 (en) 2021-11-04
AU2020257028A1 (en) 2021-05-20
ES2926287T3 (es) 2022-10-25
EP3815789B1 (fr) 2022-06-29
PT3815789T (pt) 2022-09-01
DE102019129467A1 (de) 2021-05-06

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