JP5903347B2 - High concentration powder transport device - Google Patents

High concentration powder transport device Download PDF

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JP5903347B2
JP5903347B2 JP2012161352A JP2012161352A JP5903347B2 JP 5903347 B2 JP5903347 B2 JP 5903347B2 JP 2012161352 A JP2012161352 A JP 2012161352A JP 2012161352 A JP2012161352 A JP 2012161352A JP 5903347 B2 JP5903347 B2 JP 5903347B2
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powder
crushing blade
screw
storage tank
material seal
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JP2014019560A (en
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秋彦 江間
秋彦 江間
英雄 保坂
英雄 保坂
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Nisshin Engineering Co Ltd
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Description

本発明は、圧縮性粉体を高濃度で空気輸送する高濃度粉体輸送装置に関するものである。   The present invention relates to a high-concentration powder transport apparatus that pneumatically transports a compressible powder at a high concentration.

粉体を高濃度で輸送する装置としては、例えばスクリューフィーダーの端部のマテリアルシール部においてマテリアルシールを形成し、このマテリアルシール部において回転羽根を用いて粉体を再度分散させエゼクタによって輸送する装置（例えば、特許文献１参照）や、圧力タンク内に粉体を充填した後に、タンク内部を加圧すると共に粉体を流動化させながら送出口を開放することで加圧空気と一緒に粉体を輸送する装置（例えば、特許文献２参照）等が提案されている。   As an apparatus for transporting powder at a high concentration, for example, a material seal is formed at the material seal part at the end of the screw feeder, and the powder is dispersed again using rotating blades at the material seal part and transported by an ejector. (For example, refer to Patent Document 1) Or, after filling the powder in the pressure tank, pressurize the inside of the tank and open the outlet while fluidizing the powder so that the powder is mixed with the pressurized air. A transporting device (see, for example, Patent Document 2) has been proposed.

特開昭６０−２６２７２９号公報JP 60-262729 A 特開平２−１２７３１９号公報JP-A-2-127319

しかし、上述の装置を用いて、圧縮性の高い粉体の輸送を行なう場合には、マテリアルシール部や加圧タンク内において機械力または気体の圧力によって粉体が圧縮され塊状になるため分散状態を維持した状態での輸送が困難であった。   However, when transporting highly compressible powder using the above-mentioned device, the powder is compressed and lumped by mechanical force or gas pressure in the material seal part or pressurized tank, so that it is dispersed. It was difficult to transport while maintaining

本発明の目的は、圧縮性の高い粉体を必要以上に圧縮せずに、輸送時に再分散させ、かつこの分散状態を損なうことなく空気輸送可能な高濃度粉体輸送装置を提供することである。   An object of the present invention is to provide a high-concentration powder transport device that can re-disperse a highly compressible powder without being compressed more than necessary, and can be pneumatically transported without impairing the dispersion state. is there.

本発明の高濃度粉体輸送装置は、粉体を貯留する粉体貯槽と、前記粉体貯槽から送られた粉体によって気密プラグを形成するマテリアルシール部と、前記粉体貯槽と前記マテリアルシール部の間を連結する筒状通路と、前記筒状通路内に沿設され、前記粉体貯槽から前記マテリアルシール部に粉体を搬送するスクリューと、前記スクリューの軸内に形成された空気通路を介して供給された搬送空気を前記マテリアルシール部に噴出させる前記スクリューの先端部に形成された噴出口と、前記スクリューの先端部に設けられ、前記スクリューにより搬送され前記気密プラグを形成した粉体を解砕する解砕羽根と、前記解砕羽根により解砕された粉体を搬送方向に押出す補助空気を噴出する噴出部とを備え、前記噴出部は、前記スクリューの軸周りに複数個配置されていることを特徴とする。 The high-concentration powder transport device of the present invention includes a powder storage tank for storing powder, a material seal portion that forms an airtight plug with the powder sent from the powder storage tank, the powder storage tank, and the material seal A cylindrical passage that connects between the parts, a screw that is provided in the cylindrical passage and that conveys powder from the powder storage tank to the material seal part, and an air passage formed in the shaft of the screw A jet port formed at the tip of the screw for jetting the carrier air supplied through the material seal to the material seal, and a powder provided at the tip of the screw and conveyed by the screw to form the airtight plug comprising a solution砕羽roots crushing the body, and a jetting section for jetting extruding auxiliary air the being crushed by solution砕羽root powder in the conveying direction, the ejection part, the axis circumference of the screw Characterized in that it is plural disposed.

また本発明の高濃度粉体輸送装置は、前記噴出部が前記解砕羽根の内側に配置され、前記解砕羽根により解砕された粉体を搬送方向に押出すことを特徴とする。   The high-concentration powder transport device of the present invention is characterized in that the ejection portion is disposed inside the crushing blade, and the powder crushed by the crushing blade is extruded in a conveying direction.

また本発明の高濃度粉体輸送装置は、前記噴出部が前記解砕羽根の外側に配置され、前記解砕羽根により解砕された粉体を搬送方向に押出すことを特徴とする。   The high-concentration powder transport device of the present invention is characterized in that the ejection portion is disposed outside the pulverization blade, and the powder crushed by the pulverization blade is extruded in a conveying direction.

本発明によれば、圧縮性の高い粉体を必要以上に圧縮せずに、輸送時に再分散させ、かつこの分散状態を損なうことなく輸送可能な高濃度粉体輸送装置を提供することができる。   According to the present invention, it is possible to provide a high-concentration powder transport apparatus that can re-disperse a highly compressible powder without being compressed more than necessary, and can be re-dispersed during transportation and transported without impairing this dispersed state. .

実施の形態に係る高濃度粉体輸送装置を示す断面図である。It is sectional drawing which shows the high concentration powder transport apparatus which concerns on embodiment. 図１に示すＡ−Ａ矢視図である。It is an AA arrow line view shown in FIG. 図１に示すＢ−Ｂ矢視図である。It is a BB arrow line view shown in FIG. 実施例に係るシステム構成図である。1 is a system configuration diagram according to an embodiment.

以下、図面を参照して、本発明の実施の形態に係る高濃度粉体輸送装置について説明する。図１は実施の形態に係る高濃度粉体輸送装置の断面図である。   Hereinafter, a high-concentration powder transport apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a high-concentration powder transport apparatus according to an embodiment.

高濃度粉体輸送装置２は、粉体貯槽１０を備えている。粉体貯槽１０には粉体を粉体貯槽１０に投入するための投入口（図示せず）が設けられている。粉体貯槽１０内には撹拌軸１２が水平方向に設けられており、粉体貯槽１０の側壁に設けられたベアリング１４により支持されている。撹拌軸１２には軸方向の複数の位置に、撹拌羽根１６が設けられている。撹拌軸１２は、モーター１７に接続されており、モーター１７により回転駆動され粉体貯槽１０内の粉体を撹拌混合する。   The high concentration powder transport apparatus 2 includes a powder storage tank 10. The powder storage tank 10 is provided with an input port (not shown) for supplying powder to the powder storage tank 10. A stirring shaft 12 is provided in the powder storage tank 10 in the horizontal direction, and is supported by a bearing 14 provided on the side wall of the powder storage tank 10. The stirring shaft 12 is provided with stirring blades 16 at a plurality of positions in the axial direction. The stirring shaft 12 is connected to a motor 17 and is rotationally driven by the motor 17 to stir and mix the powder in the powder storage tank 10.

スクリューフィーダー１８は、粉体貯槽１０内の下部に、水平方向に設けられている。スクリューフィーダー１８は、スクリュー２０が形成されている軸２４を有し、軸２４は粉体貯槽１０の側壁に設けられたベアリング２２により支持されている。軸２４の一方の端部近傍には撹拌軸１２に形成されたギヤ２８と噛み合うギヤ２６が形成されている。従って、モーター１７の回転により軸２４が回転駆動される。スクリューフィーダー１８の軸２４内には空気通路３０が形成され空気通路３０の一方の端部から供給された主エアー（搬送空気）が空気通路３０の他方の端部に形成されている噴出口３０ａから噴出される。   The screw feeder 18 is provided in the horizontal direction at the lower part in the powder storage tank 10. The screw feeder 18 has a shaft 24 on which a screw 20 is formed, and the shaft 24 is supported by a bearing 22 provided on the side wall of the powder storage tank 10. A gear 26 that meshes with a gear 28 formed on the stirring shaft 12 is formed near one end of the shaft 24. Accordingly, the shaft 24 is rotationally driven by the rotation of the motor 17. An air passage 30 is formed in the shaft 24 of the screw feeder 18, and the main air (carrier air) supplied from one end of the air passage 30 is formed at the other end of the air passage 30. Erupted from.

スクリューフィーダー１８の先端部には、スクリュー２０により搬送された粉体を解砕する解砕羽根３２が設けられており、解砕羽根３２が設けられているスクリューフィーダー１８の先端部は、粉体貯槽１０の側壁下部の開口に接続された筒状通路３６内に沿設されている。ここで筒状通路３６内の解砕羽根３２の粉体貯槽１０側はマテリアルシール部３４を構成し、マテリアルシール部３４において気密プラグを形成した粉体が解砕羽根３２により解砕される。筒状通路３６の解砕羽根３２の内側には、解砕羽根３２により解砕された粉体を搬送方向に押出す補助エアーを解砕羽根３２に向けて噴出する複数の噴出部３８が設けられている。   The tip of the screw feeder 18 is provided with a crushing blade 32 for crushing the powder conveyed by the screw 20, and the tip of the screw feeder 18 provided with the crushing blade 32 is a powder. It is installed in a cylindrical passage 36 connected to the opening at the lower side wall of the storage tank 10. Here, the powder storage tank 10 side of the crushing blade 32 in the cylindrical passage 36 constitutes a material seal portion 34, and the powder forming the airtight plug in the material seal portion 34 is crushed by the crushing blade 32. Inside the crushing blade 32 of the cylindrical passage 36, there are provided a plurality of ejection portions 38 for ejecting auxiliary air for extruding the powder crushed by the crushing blade 32 in the conveying direction toward the crushing blade 32. It has been.

図２は、図１に示すＡ−Ａ矢視図であり、図３は、図１に示すＢ−Ｂ矢視図である。
図２に示すように解砕羽根３２は、スクリューフィーダー１８の軸２４周りに配置される円環部３２ａと、軸２４と円環部３２ａとを接続する複数の放射状部３２ｂとを有している。また図３に示すように筒状通路３６の解砕羽根３２の内側には８個の噴出部３８が等間隔で設けられている。 2 is an AA arrow view shown in FIG. 1, and FIG. 3 is a BB arrow view shown in FIG.
As shown in FIG. 2, the crushing blade 32 has an annular portion 32a disposed around the shaft 24 of the screw feeder 18, and a plurality of radial portions 32b connecting the shaft 24 and the annular portion 32a. Yes. Further, as shown in FIG. 3, eight ejection portions 38 are provided at equal intervals inside the crushing blade 32 of the cylindrical passage 36.

この実施の形態に係る高濃度粉体輸送装置２においては、粉体貯槽１０内の粉体をスクリューフィーダー１８で定量搬送させ、スクリュー２０の先端に設けた解砕羽根３２で解砕する。ここでスクリューフィーダー１８により解砕羽根３２の位置まで搬送された粉体はスクリュー２０間に押し込まれた状態で気密プラグを形成している。そしてスクリュー２０により解砕羽根３２に向けて押出され、解砕羽根３２の円環部３２ａと放射状部３２ｂとにより順次解砕され搬送可能な凝集体の状態とされる。解砕羽根３２により解砕された粉体は噴出部３８から噴出される補助エアーによりマテリアルシール部３４内において搬送方向に吹き飛ばされ押出される。そして粉体は軸２４の先端部に形成されている噴出口３０ａから噴出される主エアーにより筒状通路３６に接続されている粉体輸送管を介して被供給装置に対して経時的に連続して搬送可能な凝集体の状態で輸送される。   In the high-concentration powder transport device 2 according to this embodiment, the powder in the powder storage tank 10 is quantitatively conveyed by the screw feeder 18 and crushed by the crushing blade 32 provided at the tip of the screw 20. Here, the powder conveyed to the position of the crushing blade 32 by the screw feeder 18 forms an airtight plug while being pushed between the screws 20. And it extrudes toward the crushing blade | wing 32 with the screw 20, and it is made into the state of the aggregate which can be sequentially crushed and conveyed by the annular part 32a and the radial part 32b of the crushing blade 32. The powder crushed by the crushing blade 32 is blown off in the conveying direction in the material seal portion 34 by the auxiliary air blown from the blowout portion 38 and extruded. The powder continues to the supply apparatus over time via the powder transport pipe connected to the cylindrical passage 36 by the main air ejected from the ejection port 30a formed at the tip of the shaft 24. Then, it is transported in the state of an aggregate that can be transported.

この実施の形態によれば、圧縮性の高い粉体を必要以上に圧縮せずに、輸送時に再分散させ、この分散状態を保ったまま粉体を被供給装置に対して経時的に定量供給することができる。   According to this embodiment, a highly compressible powder is re-dispersed during transportation without being compressed more than necessary, and the powder is quantitatively supplied over time to the supply apparatus while maintaining this dispersed state. can do.

なお、上述の実施の形態においては、筒状通路３６の解砕羽根３２の内側には８個の噴出部３８が等間隔で設けられているが、筒状通路３６の解砕羽根３２の外側に補助エアーの噴出方向が搬送方向を向くようにして複数の噴出部を設けるようにしてもよい。また、筒状通路３６の解砕羽根３２の内側及び外側に噴出部を設けるようにしてもよい。   In the above-described embodiment, eight ejection portions 38 are provided at equal intervals on the inner side of the crushing blade 32 of the cylindrical passage 36, but the outer side of the crushing blade 32 of the cylindrical passage 36. In addition, a plurality of ejection portions may be provided so that the ejection direction of the auxiliary air faces the conveyance direction. Moreover, you may make it provide a jet part in the inner side and the outer side of the crushing blade | wing 32 of the cylindrical channel | path 36. FIG.

上述の実施の形態に係る高濃度粉体輸送装置２を用いた実施例において粉体輸送試験を行なった。試験に使用したシステム構成を図４に示す。高濃度粉体輸送装置２より粉体が供給され、粉体輸送管５０により横方向に計４ｍ、高さ方向に４．５ｍの空気輸送を行ない、レシーバータンク５２にて回収した。試験に用いた装置の筒状通路内径は１３０ｍｍ、輸送配管には内径７６ｍｍのエクレマーホースを用いた。   A powder transport test was performed in the example using the high-concentration powder transport device 2 according to the above-described embodiment. The system configuration used for the test is shown in FIG. The powder was supplied from the high-concentration powder transport device 2, and the air was transported by a total of 4 m in the horizontal direction and 4.5 m in the height direction through the powder transport pipe 50, and collected by the receiver tank 52. The cylindrical passage inner diameter of the apparatus used for the test was 130 mm, and an excremer hose with an inner diameter of 76 mm was used for the transport piping.

空気輸送に使用したセッコウ粉は、（１）何度か試験に使用したサンプル、（２）初めて開封して試験に使用するサンプルの２種を用いた。各サンプルの含水率を表１に示す。   As the gypsum powder used for pneumatic transportation, (1) a sample used several times for the test, and (2) a sample opened for the first time and used for the test were used. Table 1 shows the moisture content of each sample.

Figure 0005903347
Figure 0005903347

輸送試験の各サンプルの試験結果を表２に示す。   Table 2 shows the test results of each sample in the transport test.

Figure 0005903347
Figure 0005903347

これより、サンプル（１）では最大４ｔ／ｈ、サンプル（２）でも２ｔ／ｈで輸送することができることが分かる。   From this, it can be seen that the sample (1) can be transported at a maximum of 4 t / h, and the sample (2) can also be transported at 2 t / h.

２…高濃度粉体輸送装置、１０…粉体貯槽、１２…撹拌軸、１６…撹拌羽根、１７…モーター、１８…スクリューフィーダー、２０…スクリュー、２４…軸、３０…空気通路、３０ａ…噴出口、３２…解砕羽根、３４…マテリアルシール部、３６…筒状通路、３８…噴出部 DESCRIPTION OF SYMBOLS 2 ... High concentration powder transport apparatus, 10 ... Powder storage tank, 12 ... Stirring shaft, 16 ... Stirring blade, 17 ... Motor, 18 ... Screw feeder, 20 ... Screw, 24 ... Shaft, 30 ... Air passage, 30a ... Jet Exit, 32 ... Crushing blade, 34 ... Material seal part, 36 ... Cylindrical passage, 38 ... Ejection part

Claims (3)

粉体を貯留する粉体貯槽と、
前記粉体貯槽から送られた粉体によって気密プラグを形成するマテリアルシール部と、
前記粉体貯槽と前記マテリアルシール部の間を連結する筒状通路と、
前記筒状通路内に沿設され、前記粉体貯槽から前記マテリアルシール部に粉体を搬送するスクリューと、
前記スクリューの軸内に形成された空気通路を介して供給された搬送空気を前記マテリアルシール部に噴出させる前記スクリューの先端部に形成された噴出口と、
前記スクリューの先端部に設けられ、前記スクリューにより搬送され前記気密プラグを形成した粉体を解砕する解砕羽根と、
前記解砕羽根により解砕された粉体を搬送方向に押出す補助空気を噴出する噴出部と、
を備え、
前記噴出部は、前記スクリューの軸周りに複数個配置されていることを特徴とする高濃度粉体輸送装置。 A powder storage tank for storing powder;
A material seal part that forms an airtight plug with the powder sent from the powder storage tank;
A cylindrical passage connecting the powder storage tank and the material seal part;
A screw that is installed in the cylindrical passage and conveys powder from the powder storage tank to the material seal part,
A jet port formed at the tip of the screw for jetting carrier air supplied through an air passage formed in the shaft of the screw to the material seal part;
A crushing blade that crushes the powder that is provided at the tip of the screw and is conveyed by the screw to form the airtight plug;
A jet part for jetting auxiliary air for extruding the powder crushed by the crushing blade in the conveying direction;
Equipped with a,
A high-concentration powder transport apparatus , wherein a plurality of the jetting parts are arranged around the axis of the screw . 前記噴出部は、前記解砕羽根の内側に配置され、前記解砕羽根により解砕された粉体を搬送方向に押出すことを特徴とする請求項１記載の高濃度粉体輸送装置。   The high-concentration powder transport apparatus according to claim 1, wherein the ejection portion is disposed inside the crushing blade and extrudes the powder crushed by the crushing blade in a conveying direction. 前記噴出部は、前記解砕羽根の外側に配置され、前記解砕羽根により解砕された粉体を搬送方向に押出すことを特徴とする請求項１記載の高濃度粉体輸送装置。   The high-concentration powder transport apparatus according to claim 1, wherein the ejection part is disposed outside the crushing blade and extrudes the powder crushed by the crushing blade in a conveying direction.
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