JP2006130479A - Fine powder recovering device for grinder - Google Patents

Fine powder recovering device for grinder Download PDF

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Publication number
JP2006130479A
JP2006130479A JP2004325373A JP2004325373A JP2006130479A JP 2006130479 A JP2006130479 A JP 2006130479A JP 2004325373 A JP2004325373 A JP 2004325373A JP 2004325373 A JP2004325373 A JP 2004325373A JP 2006130479 A JP2006130479 A JP 2006130479A
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fine powder
suction
pulverizer
jet nozzle
grinder
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Kazutomo Hayashimoto
和智 林元
Katsuya Takeshima
克哉 竹島
Koji Suzuki
孝司 鈴木
Takashi Nagato
貴 長門
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Corso Idea
CORSO IDEA KK
Furukawa Co Ltd
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Corso Idea
CORSO IDEA KK
Furukawa Co Ltd
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Priority to JP2004325373A priority Critical patent/JP2006130479A/en
Publication of JP2006130479A publication Critical patent/JP2006130479A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a fine powder recovering device of a grinder requiring no cleaning of a suction fan, with easy maintenance, and lessening the adhesion of a fine powder to the inner wall of a transport pipe. <P>SOLUTION: This fine powder recovering device is equipped with a suction delivery pipe 3 connected to a discharge port 2 of the grinder 1, a jet nozzle 4 arranged along the inner periphery of the suction delivery pipe 3 and jetting air toward a delivery side to suck and deliver the fine powder ground by the grinder 1, an air blower 5 for supplying air to the jet nozzle 4 from the outside, and a recovering hopper 6 for recovering the fine powder fed together with air. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、農産物や鉱物等の各種原料および半製品を微粉砕する微粉末製造工程で使用される粉砕機の微粉末回収装置に関するものである。   The present invention relates to a fine powder recovery device for a pulverizer used in a fine powder production process for finely pulverizing various raw materials such as agricultural products and minerals and semi-finished products.

農産物や鉱物等の各種原料を微粉砕する微粉末製造工程で使用される粉砕機には、ピンミル、ハンマーミル、あるいはビーズミルなどがある。また、近年、粉砕効率がよく粒度の小さい製品を得ることができる気流式粉砕機も使用されている。
気流式粉砕機には、同一回転軸に所定距離互いに離隔した状態で取付けられた第一回転翼と第二回転翼とをケーシング内に備えたもの（特許文献１参照）や、二本の回転軸にそれぞれ取付けられ所定距離互いに離隔した状態で相対する第一回転翼と第二回転翼とをケーシング内に備えたもの（特許文献２参照）等がある。 Examples of the pulverizer used in the fine powder manufacturing process for pulverizing various raw materials such as agricultural products and minerals include a pin mill, a hammer mill, and a bead mill. In recent years, airflow type pulverizers that can obtain products with high pulverization efficiency and small particle sizes are also used.
The airflow type pulverizer includes a first rotating blade and a second rotating blade mounted on the same rotating shaft while being separated from each other by a predetermined distance in a casing (see Patent Document 1), or two rotating blades. There is a type in which a first rotary blade and a second rotary blade that are respectively attached to a shaft and are opposed to each other in a state of being separated from each other by a predetermined distance are provided in a casing (see Patent Document 2).

粉砕機には、微粉末を回収するための装置として、図３に示すにように、微粉砕された微粉末を空気と共に吸引して粉砕機３１から排出させる吸引ファン３５と、吸引ファン３５から送られた気流中の微粉末を捕集し製品として回収する回収ホッパー３６が設けられている。
粉砕機３１の排出口３２と吸引ファン３５との間には吸引管３３、吸引ファン３５と回収ホッパー３６との間には輸送管３７が設けられている。 As shown in FIG. 3, the pulverizer includes a suction fan 35 that sucks the finely pulverized fine powder together with air and discharges it from the pulverizer 31, as shown in FIG. A collection hopper 36 that collects the fine powder in the sent airflow and collects it as a product is provided.
A suction pipe 33 is provided between the discharge port 32 of the pulverizer 31 and the suction fan 35, and a transport pipe 37 is provided between the suction fan 35 and the recovery hopper 36.

回収ホッパー３６において、微粉末を含む気流中から微粉末を分離回収するために用いられる代表的な手段としてはバグフィルターがある。
バグフィルターは、ステンレススチール等の金属製の回収ホッパー３６内に籠状のフィルターエレメント４６や円筒状の濾布を収容し、回収ホッパー３６に流入する微粉末を含む気流中から微粉末をフィルターエレメント４６や濾布に付着させて分離し、微粉末が除去された空気は大気中へ排出する。 As a representative means used for separating and collecting fine powder from an air flow containing fine powder in the collection hopper 36, there is a bag filter.
The bag filter accommodates a bowl-shaped filter element 46 and a cylindrical filter cloth in a metal recovery hopper 36 made of stainless steel or the like, and removes fine powder from an air flow containing fine powder flowing into the recovery hopper 36. The air from which the fine powder has been removed by being attached to 46 and filter cloth is discharged into the atmosphere.

フィルターエレメント４６や濾布に付着した微粉末は、高圧空気をノズル４７からフィルターエレメント４６や濾布にパルスジェットとして吹きつけ、フィルターエレメントや濾布に高圧空気を通過させると共に衝撃振動を与えることにより強制的に払い落とし、ホッパー底部に設けたロータリーバルブ４８から取出し、製品として回収する（特許文献３参照）。   The fine powder adhering to the filter element 46 and the filter cloth is blown with high-pressure air as a pulse jet from the nozzle 47 to the filter element 46 and the filter cloth. Forcibly removed, removed from the rotary valve 48 provided at the bottom of the hopper, and collected as a product (see Patent Document 3).

ところが、この粉砕機３１の微粉末回収装置では、粉砕機３１で微粉砕された微粉末を吸引ファン３５で吸引して回収ホッパー３６へ輸送するようになっているため、吸引ファン３５の内部のインペラ等の接気部分や輸送管３７の内壁には微粉末が付着する。
従って、粉砕作業の終了後には、吸引ファン３５の内部や輸送管３７の内壁を清掃する必要がある。特に、吸引ファン３５のインペラの背面等に付着残存する微粉末は取り難く、完璧な清掃を行う場合にはインペラを分解しなければならず、吸引ファン３５の清掃は手間のかかる作業であった。 However, in the fine powder recovery device of the pulverizer 31, the fine powder finely pulverized by the pulverizer 31 is sucked by the suction fan 35 and transported to the recovery hopper 36. Fine powder adheres to an air contact portion such as an impeller and an inner wall of the transport pipe 37.
Therefore, after the crushing operation is completed, it is necessary to clean the inside of the suction fan 35 and the inner wall of the transport pipe 37. In particular, it is difficult to remove fine powder remaining on the back surface of the impeller of the suction fan 35, and the impeller must be disassembled when performing perfect cleaning, and the cleaning of the suction fan 35 is a laborious operation. .

そこで、吸引ファン３５の内部に付着する微粉末を少なくするために、図４に示すように、回収ホッパー３６の後段に吸引ファン３５を設けて、微粉末を回収することも考えられる。
しかし、回収ホッパー３６の後段に吸引ファン３５を設けても、輸送管３７の内壁への微粉末の付着を少なくすることはできない。
特開２０００−６１３４０号公報 特開２００３−１１２７号公報 実開平６−８５０１６号公報 Therefore, in order to reduce the fine powder adhering to the inside of the suction fan 35, it is conceivable to collect the fine powder by providing the suction fan 35 at the rear stage of the collection hopper 36 as shown in FIG.
However, even if the suction fan 35 is provided at the subsequent stage of the recovery hopper 36, the adhesion of fine powder to the inner wall of the transport pipe 37 cannot be reduced.
JP 2000-61340 A JP 2003-1127 A Japanese Utility Model Publication No. 6-85016

本発明は、従来の粉砕機の微粉末回収装置における上記問題を解決するものであって、吸引ファンの清掃が不要で保守が容易であり、輸送管の内壁への微粉末の付着も少なくすることのできる粉砕機の微粉末回収装置を提供することを目的とする。   The present invention solves the above-mentioned problems in the fine powder recovery device of a conventional pulverizer, and does not require cleaning of the suction fan, is easy to maintain, and reduces the adhesion of fine powder to the inner wall of the transport pipe. An object of the present invention is to provide a fine powder recovery device for a pulverizer that can handle the above.

本発明の粉砕機の微粉末回収装置は、粉砕機の排出口に接続された吸引吐出管と、吸引吐出管の内周に沿って設けられ、吐出側に向けて気体を噴出して粉砕機で微粉砕された微粉末を吸引吐出するジェットノズルと、外部からジェットノズルに気体を供給する送風機と、気体と共に送られた微粉末を回収する回収ホッパーとを備えることにより上記課題を解決している。   The fine powder recovery device of the pulverizer according to the present invention is provided along the suction and discharge pipe connected to the discharge port of the pulverizer and the inner periphery of the suction and discharge pipe, and pulverizes by ejecting gas toward the discharge side. The above-mentioned problems are solved by providing a jet nozzle that sucks and discharges finely pulverized fine powder with a blower that supplies gas to the jet nozzle from the outside, and a recovery hopper that collects the fine powder sent together with the gas Yes.

この粉砕機の微粉末回収装置では、吸引吐出管の内周に沿って設けられたジェットノズルから、吐出側に向けて気体を噴出することにより、吸引吐出管内に気流を発生させ、粉砕機で微粉砕された微粉末を吸引吐出して回収ホッパーへ送り、回収ホッパーで微粉末を回収する。
このため、粉砕機の排出口から回収ホッパーまでの微粉末の輸送経路の途中に吸引ファンを配置する必要がなく、従って、粉砕作業の終了後に行っていた吸引ファンに付着した微粉末の清掃作業が不要となる。また、ジェットノズルから噴出された気体により輸送管の内壁付近の流速が高くなるため、輸送管の内壁への微粉末の付着を低減できる。
吸引吐出管に絞り体を設けると、流路断面積が絞られてジェットノズルから気体を噴出することによって生ずる気流の流速が大となり、吸引効果が高くなる。
ジェットノズルが流量可変であると、粉砕物によって異なる粉砕機の運転条件の設定状態に合わせて適切に微粉末を回収することができる。 In the fine powder recovery device of this pulverizer, an air flow is generated in the suction discharge pipe by jetting gas toward the discharge side from a jet nozzle provided along the inner periphery of the suction discharge pipe. The finely pulverized fine powder is sucked and discharged and sent to the collection hopper, and the fine powder is collected by the collection hopper.
For this reason, there is no need to arrange a suction fan in the middle of the fine powder transportation route from the discharge port of the pulverizer to the recovery hopper, and therefore the fine powder adhering to the suction fan that has been performed after the pulverization operation is completed. Is no longer necessary. Moreover, since the flow velocity near the inner wall of the transport pipe is increased by the gas ejected from the jet nozzle, adhesion of fine powder to the inner wall of the transport pipe can be reduced.
When the throttle body is provided in the suction / discharge pipe, the flow rate of the air flow generated by jetting gas from the jet nozzle is increased by narrowing the cross-sectional area of the flow path, and the suction effect is enhanced.
When the flow rate of the jet nozzle is variable, fine powder can be recovered appropriately in accordance with the setting state of the operating conditions of the pulverizer that varies depending on the pulverized product.

本発明の気流式粉砕機の微粉末回収装置は、吸引ファンの清掃が不要で保守が容易である。また、輸送管の内壁への微粉末の付着も少なくすることができる。   The fine powder recovery device of the airflow type pulverizer of the present invention does not require cleaning of the suction fan and is easy to maintain. Moreover, adhesion of fine powder to the inner wall of the transport pipe can be reduced.

図１は本発明の実施の一形態である粉砕機の微粉末回収装置の構成図、図２は吸引吐出管に絞り体を設けた微粉末回収装置の説明図である。
粉砕機の微粉末回収装置は、粉砕機１の排出口２に接続された吸引吐出管３と、吸引吐出管３の内周に沿って設けられ、吐出側に向けて気体を噴出するジェットノズル４と、外部からジェットノズル４に気体を供給する送風機５と、気体と共に送られた微粉末を回収する回収ホッパー６とを備えている。 FIG. 1 is a configuration diagram of a fine powder recovery apparatus for a pulverizer according to an embodiment of the present invention, and FIG. 2 is an explanatory view of the fine powder recovery apparatus in which a suction body is provided in a suction / discharge pipe.
The fine powder recovery device of the pulverizer includes a suction / discharge pipe 3 connected to the discharge port 2 of the pulverizer 1 and a jet nozzle that is provided along the inner periphery of the suction / discharge pipe 3 and jets gas toward the discharge side. 4, a blower 5 that supplies gas to the jet nozzle 4 from the outside, and a recovery hopper 6 that recovers the fine powder sent together with the gas.

吸引吐出管３と回収ホッパー６との間には輸送管７、送風機５とジェットノズル４との間には送風管８が設けられている。なお、吸引吐出管３は、直接排出口２に接続せず輸送管７の途中に配置することもできる。
この微粉末回収装置では、吸引吐出管３の内周に沿って設けられたジェットノズル４から、排出側に向けて空気を噴出することにより、粉砕機１で微粉砕された微粉末を吸引吐出して回収ホッパー６へ送る。このとき、ジェットノズル４から噴出された空気により輸送管７の内壁付近の流速が中心部より高くなる。ジェットノズル４の流量は、送風機２の回転数を制御することにより、変更可能となっている。 A transport pipe 7 is provided between the suction / discharge pipe 3 and the recovery hopper 6, and a blower pipe 8 is provided between the blower 5 and the jet nozzle 4. Note that the suction / discharge pipe 3 can be disposed in the middle of the transport pipe 7 without being directly connected to the discharge port 2.
In this fine powder recovery device, fine powder pulverized by the pulverizer 1 is sucked and discharged by jetting air toward the discharge side from a jet nozzle 4 provided along the inner periphery of the suction and discharge pipe 3. To the collection hopper 6. At this time, the air flow from the jet nozzle 4 causes the flow velocity near the inner wall of the transport pipe 7 to be higher than the central portion. The flow rate of the jet nozzle 4 can be changed by controlling the rotational speed of the blower 2.

回収ホッパー６はステンレススチール製であり、微粉末を気流から分離して回収するための手段としてバグフィルターを用いている。回収ホッパー６内には籠状のフィルターエレメント１６が収容されており、回収ホッパー６に流入する微粉末を含む気流中から微粉末をフィルターエレメント１６に付着させて分離し、微粉末が除去された空気は大気中へ排出する。   The recovery hopper 6 is made of stainless steel, and a bag filter is used as means for separating and recovering the fine powder from the airflow. A trapezoidal filter element 16 is accommodated in the recovery hopper 6, and the fine powder is adhered to the filter element 16 from the air flow including the fine powder flowing into the recovery hopper 6, and the fine powder is removed. Air is discharged into the atmosphere.

フィルターエレメント１６に付着した微粉末は、高圧空気をノズル１７からフィルターエレメントにパルスジェットとして吹きつけ、フィルターエレメント１６に高圧空気を通過させると共に衝撃振動を与えることにより強制的に払い落とし、回収ホッパー６の底部に設けたロータリーバルブ１８から取出し、製品として回収する。
回収ホッパー６としては、防水透湿性シートで外周が構成されたもの等、他の形式のものを使用してもよい。 The fine powder adhering to the filter element 16 is blown off forcibly by blowing high-pressure air as a pulse jet from the nozzle 17 to the filter element, allowing the high-pressure air to pass through the filter element 16 and applying impact vibration, and the recovery hopper 6 It is taken out from a rotary valve 18 provided at the bottom of the product and collected as a product.
As the collection hopper 6, other types such as those having an outer periphery formed of a waterproof and moisture-permeable sheet may be used.

この微粉末回収装置は、ピンミル、ハンマーミル、ビーズミル、気流式粉砕機等種々の形式の粉砕機から微粉末を回収するために使用できる。
粉砕作業では、粉砕機用モータ１１で微粉砕機１を駆動し、原料投入口１２から原料を投入して粉砕する。同時に、送風機用モータ１５で送風機５を駆動してジェットノズル４に気体を供給し、吐出側に向けて気体を噴出することにより、吸引吐出管３内に気流を発生させ、粉砕機１で微粉砕された微粉末を吸引吐出して回収ホッパー６に送る。回収ホッパー６では気流中から微粉末をフィルターエレメント１６に付着させて分離し、微粉末が除去された空気は大気中へ排出する。 This fine powder recovery apparatus can be used for recovering fine powder from various types of pulverizers such as a pin mill, a hammer mill, a bead mill, and an airflow pulverizer.
In the pulverization operation, the pulverizer 1 is driven by the pulverizer motor 11, and the raw material is supplied from the raw material inlet 12 for pulverization. At the same time, the blower motor 15 drives the blower 5 to supply gas to the jet nozzle 4 and ejects the gas toward the discharge side, thereby generating an air flow in the suction / discharge pipe 3. The pulverized fine powder is sucked and discharged and sent to the collection hopper 6. In the recovery hopper 6, fine powder is adhered to the filter element 16 and separated from the airflow, and the air from which the fine powder has been removed is discharged into the atmosphere.

フィルターエレメント１６に付着した微粉末は、高圧空気をノズル１７からフィルターエレメント１６にパルスジェットとして吹きつけて払い落とし、ロータリーバルブ１８から取出し、製品として回収する。
粉砕機１の排出口２から回収ホッパー６までの微粉末の輸送経路の途中に吸引ファンを配置しないので、粉砕作業の終了後に行っていた吸引ファンに付着した微粉末の清掃作業を行う必要はない。また、ジェットノズル４から噴出された気体により輸送管７の内壁付近の流速が高くなるため、輸送管７の内壁への微粉末の付着を低減できる。 The fine powder adhering to the filter element 16 is blown off by blowing high-pressure air from the nozzle 17 to the filter element 16 as a pulse jet, taken out from the rotary valve 18 and collected as a product.
Since the suction fan is not arranged in the middle of the transport route of the fine powder from the discharge port 2 of the pulverizer 1 to the recovery hopper 6, it is necessary to clean the fine powder adhering to the suction fan after the pulverization operation is completed. Absent. Moreover, since the flow velocity near the inner wall of the transport pipe 7 is increased by the gas ejected from the jet nozzle 4, adhesion of fine powder to the inner wall of the transport pipe 7 can be reduced.

ジェットノズル４は、送風機２の回転数を制御し、粉砕物によって異なる気流式粉砕機１の回転数の設定状態に合わせて流量を変更することにより、適切に微粉末を排出させることができる。
図２に示すように、吸引吐出管３内に絞り体９を設けると、流路断面積が絞られてジェットノズル４から気体を噴出することによって生ずる気流の流速が大となり、吸引効果が高くなる。ここで、絞り体９は、細長の卵形状として、乱流、渦流の発生を防止して滑らかな気流を生じさせると共に、微粉末の付着も少なくしている。 The jet nozzle 4 can discharge the fine powder appropriately by controlling the rotational speed of the blower 2 and changing the flow rate according to the setting state of the rotational speed of the airflow type pulverizer 1 that varies depending on the pulverized material.
As shown in FIG. 2, when the throttle body 9 is provided in the suction / discharge pipe 3, the flow rate of the air flow generated when the flow passage cross-sectional area is reduced and the gas is ejected from the jet nozzle 4 increases, and the suction effect is high. Become. Here, the throttle body 9 is formed in an elongated egg shape to prevent generation of turbulent flow and vortex flow to generate a smooth air flow, and to reduce the adhesion of fine powder.

本発明の実施の一形態である粉砕機の微粉末回収装置の構成図である。It is a block diagram of the fine powder collection | recovery apparatus of the grinder which is one Embodiment of this invention. 吸引吐出管に絞り体を設けた微粉末回収装置の説明図である。It is explanatory drawing of the fine powder collection | recovery apparatus which provided the throttle body in the suction discharge pipe. 従来の粉砕機の微粉末回収装置の構成図である。It is a block diagram of the fine powder collection | recovery apparatus of the conventional crusher. 回収ホッパーの後段に吸引ファンを設けた、従来の粉砕機の微粉末回収装置の構成図である。It is a block diagram of the fine powder collection | recovery apparatus of the conventional crusher which provided the suction fan in the back | latter stage of the collection | recovery hopper.

符号の説明Explanation of symbols

１ 粉砕機
２ 排出口
３ 吸引吐出管
４ ジェットノズル
５ 送風機
６ 回収ホッパー
７ 輸送管
８ 送風管
９ 絞り体 DESCRIPTION OF SYMBOLS 1 Crusher 2 Discharge port 3 Suction / discharge pipe 4 Jet nozzle 5 Blower 6 Recovery hopper 7 Transport pipe 8 Blower pipe 9 Drawing body

Claims (3)

粉砕機の排出口に接続された吸引吐出管と、吸引吐出管の内周に沿って設けられ、吐出側に向けて気体を噴出して粉砕機で微粉砕された微粉末を吸引吐出するジェットノズルと、外部からジェットノズルに気体を供給する送風機と、気体と共に送られた微粉末を回収する回収ホッパーとを備えたことを特徴とする粉砕機の微粉末回収装置。   A suction / discharge pipe connected to the discharge port of the pulverizer, and a jet that is provided along the inner periphery of the suction / discharge pipe, and that sucks and discharges fine powder pulverized by the pulverizer by jetting gas toward the discharge side A fine powder recovery apparatus for a pulverizer, comprising a nozzle, a blower for supplying gas to the jet nozzle from the outside, and a recovery hopper for recovering the fine powder sent together with the gas. 吸引吐出管に流路断面積を絞るための絞り体を設けたことを特徴とする請求項１記載の粉砕機の微粉末回収装置。   2. The fine powder recovery apparatus for a pulverizer according to claim 1, wherein a throttle body for reducing the cross-sectional area of the flow path is provided in the suction / discharge pipe. ジェットノズルが流量可変であることを特徴とする請求項１又は請求項２記載の粉砕機の微粉末回収装置。   The fine powder recovery device for a pulverizer according to claim 1 or 2, wherein the flow rate of the jet nozzle is variable.
JP2004325373A 2004-11-09 2004-11-09 Fine powder recovering device for grinder Pending JP2006130479A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008062141A (en) * 2006-09-05 2008-03-21 Furukawa Industrial Machinery Systems Co Ltd Airflow fine powder manufacturing apparatus
KR101015567B1 (en) 2008-11-13 2011-02-17 강석진 Powder acceptor for powdering machine
CN102320475A (en) * 2011-06-07 2012-01-18 马鞍山钢铁股份有限公司 Calcined lime conveying system
CN103043443A (en) * 2012-12-17 2013-04-17 天津英康科技发展有限公司 Expanded perlite sand raking machine and working method thereof
CN103332497A (en) * 2013-07-17 2013-10-02 佳施加德士(苏州)塑料有限公司 Material suction device
CN104192582A (en) * 2014-08-07 2014-12-10 安徽省阜阳市速发机械有限责任公司 Sunning ground grain suction machine
WO2023283621A1 (en) * 2021-07-08 2023-01-12 Industrial Vacuum Transfer Services Usa, Llc Assemblies and methods for material extraction

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JPS59101961U (en) * 1982-12-27 1984-07-09 三立マテハン株式会社 Vacuum suction machine ejector
JPH01160200U (en) * 1988-04-28 1989-11-07
JPH10621A (en) * 1996-06-14 1998-01-06 Tanaka:Kk Method and apparatus for pulverizing belt-shaped plastic sheet
JP2004290738A (en) * 2003-03-25 2004-10-21 Kurimoto Ltd Pneumatic crusher

Patent Citations (4)

* Cited by examiner, † Cited by third party
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JPS59101961U (en) * 1982-12-27 1984-07-09 三立マテハン株式会社 Vacuum suction machine ejector
JPH01160200U (en) * 1988-04-28 1989-11-07
JPH10621A (en) * 1996-06-14 1998-01-06 Tanaka:Kk Method and apparatus for pulverizing belt-shaped plastic sheet
JP2004290738A (en) * 2003-03-25 2004-10-21 Kurimoto Ltd Pneumatic crusher

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008062141A (en) * 2006-09-05 2008-03-21 Furukawa Industrial Machinery Systems Co Ltd Airflow fine powder manufacturing apparatus
KR101015567B1 (en) 2008-11-13 2011-02-17 강석진 Powder acceptor for powdering machine
CN102320475A (en) * 2011-06-07 2012-01-18 马鞍山钢铁股份有限公司 Calcined lime conveying system
CN103043443A (en) * 2012-12-17 2013-04-17 天津英康科技发展有限公司 Expanded perlite sand raking machine and working method thereof
CN103332497A (en) * 2013-07-17 2013-10-02 佳施加德士(苏州)塑料有限公司 Material suction device
CN104192582A (en) * 2014-08-07 2014-12-10 安徽省阜阳市速发机械有限责任公司 Sunning ground grain suction machine
WO2023283621A1 (en) * 2021-07-08 2023-01-12 Industrial Vacuum Transfer Services Usa, Llc Assemblies and methods for material extraction
WO2023283628A1 (en) * 2021-07-08 2023-01-12 Industrial Vacuum Transfer Services Usa, Llc Assemblies and methods for material extraction from retention collections

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