TW201718378A - Device for transportation of powder - Google Patents
Device for transportation of powder Download PDFInfo
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- TW201718378A TW201718378A TW104138709A TW104138709A TW201718378A TW 201718378 A TW201718378 A TW 201718378A TW 104138709 A TW104138709 A TW 104138709A TW 104138709 A TW104138709 A TW 104138709A TW 201718378 A TW201718378 A TW 201718378A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/58—Devices for accelerating or decelerating flow of the materials; Use of pressure generators
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- Air Transport Of Granular Materials (AREA)
Abstract
Description
本揭露是有關一種粉體輸送裝置，尤指一種可輸送高溫粉體之粉體輸送裝置。 The present disclosure relates to a powder conveying device, and more particularly to a powder conveying device capable of conveying high temperature powder.
現今鈣迴路捕獲二氧化碳已成為一種減碳技術，其利用CaO吸附煙氣中的CO2來反應生成CaCO3，藉此降低煙氣中的CO2濃度。而CaCO3經煅燒爐煅燒後可分離出CaO及CO2，其中CaO粉體溫度約在650~750℃。此CaO粉體通常需要經由氣力輸送機(Pneumatic Conveyer)再送至25公尺高的進料倉，以再進行碳捕獲的循環操作，其中，CaO粉體經氣力輸送後，粉體溫度在工作流程中仍必須維持在400℃以上以利操作。 The current capture of carbon dioxide by the calcium circuit has become a carbon reduction technology that uses CaO to adsorb CO 2 in the flue gas to react to form CaCO 3 , thereby reducing the CO 2 concentration in the flue gas. CaO 3 can be separated from CaO and CO 2 after calcination in a calciner, wherein the CaO powder temperature is about 650-750 °C. This CaO powder usually needs to be sent to a 25-meter-high feed bin via a pneumatic conveyor (Pneumatic Conveyer) to perform a carbon capture cycle. After the CaO powder is pneumatically conveyed, the powder temperature is in the workflow. It must still be maintained above 400 °C for operation.
然而，目前現有的粉體輸送裝置多僅能在常溫下進行粉體輸送，無法因應高溫粉體。此外，現有的粉體輸送裝置的架構為進料管接於三通管上，且其三通管內設置有氣送噴嘴，該氣送噴嘴之深入長度約在進料口的中心位置，如此使得進料口處無法形成有效負壓氣封，而且又有向上氣流衝擊進料口。如欲以現有的粉體輸送裝置輸送高溫粉體，則僅能以增加粉體操作量的方式進行，即增加操作之 固/氣比。如此將使輸送管線壓損相對增加，造成更多的向上氣流衝擊進料口，而發生粉塵溢散及堵料。 However, at present, most of the existing powder conveying devices can only carry out powder transportation at normal temperature, and cannot cope with high-temperature powder. In addition, the structure of the existing powder conveying device is such that the feeding pipe is connected to the tee pipe, and the air pipe is disposed in the tee pipe, and the deep length of the gas feeding nozzle is about the center of the feeding port, The effective negative pressure gas seal cannot be formed at the feed inlet, and the upward airflow impacts the feed inlet. If the high-temperature powder is to be transported by the existing powder conveying device, it can be carried out only by increasing the amount of powder operation, that is, increasing the operation. Solid/gas ratio. This will increase the pressure loss of the conveying line relatively, causing more upward airflow to impact the inlet, and dust overflow and blockage will occur.
是以，如何提供一種粉體輸送裝置以因應高溫粉體之輸送，為目前亟待解決的課題之一。 Therefore, how to provide a powder conveying device to cope with the transportation of high-temperature powder is one of the urgent problems to be solved.
本揭露之一目的在於提供一種粉體輸送裝置，包括：混合管，其一端連接一文氏管；氣送噴嘴，設置於該混合管內部，該氣送噴嘴之口端朝向該文氏管之喉口；以及進料管，連接於該混合管上且位於該氣送噴嘴之上方，其中，該進料管與該混合管之間形成一大於0度而小於90度之角度。 An object of the present disclosure is to provide a powder conveying device comprising: a mixing tube having a venturi connected at one end thereof; a gas delivery nozzle disposed inside the mixing tube, the mouth end of the gas delivery nozzle facing the throat of the venturi And a feeding tube connected to the mixing tube and located above the gas delivery nozzle, wherein an angle greater than 0 degrees and less than 90 degrees is formed between the feeding tube and the mixing tube.
1‧‧‧粉體輸送裝置 1‧‧‧Powder conveyor
10‧‧‧混合管 10‧‧‧Mixed tube
11‧‧‧文氏管 11‧‧‧ Venturi tube
111‧‧‧喉口 111‧‧‧ throat
12‧‧‧氣送噴嘴 12‧‧‧Air delivery nozzle
121‧‧‧口端 121‧‧‧ mouth
13‧‧‧進料管 13‧‧‧ Feeding tube
14‧‧‧調變噴嘴流速單元 14‧‧‧Modulated nozzle flow rate unit
141‧‧‧滑動螺桿 141‧‧‧Sliding screw
142‧‧‧螺帽軸承 142‧‧‧ Nut bearing
143‧‧‧塞頭 143‧‧‧ 塞头
144‧‧‧撓性曲軸 144‧‧‧Flexible crankshaft
145‧‧‧轉動裝置 145‧‧‧Rotating device
15‧‧‧鼓風機 15‧‧‧Blowers
16‧‧‧風門 16‧‧‧ damper
17‧‧‧壓力控制器 17‧‧‧ Pressure controller
18、19‧‧‧粉體 18, 19‧‧‧ powder
20‧‧‧氣送風 20‧‧‧Air supply
X、Y、Z‧‧‧軸線 X, Y, Z‧‧‧ axis
θ 1、θ 2‧‧‧角度 θ 1 , θ 2‧‧‧ angle
第1圖為本揭露之粉體輸送裝置之構成示意圖；第2A圖為本揭露之粉體輸送裝置之溫度與氣送風量之效能示意圖；第2B圖為本揭露之粉體輸送裝置之溫度與輸送粉體量之效能示意圖。 1 is a schematic view showing the structure of the powder conveying device of the present disclosure; FIG. 2A is a schematic diagram showing the efficiency of the temperature and air supply volume of the powder conveying device of the present disclosure; FIG. 2B is the temperature of the powder conveying device of the present disclosure; Schematic diagram of the effectiveness of conveying powder.
以下藉由特定的具體實施例說明本揭露之實施方式，熟悉此技藝之人士可由本說明書所揭示之內容輕易地瞭解本揭露之其他優點及功效。 The embodiments of the present disclosure are described below by way of specific embodiments, and those skilled in the art can readily appreciate the other advantages and functions of the present disclosure.
須知，本說明書所附圖式所繪示之結構、比例、大小等，均僅用以配合說明書所揭示之內容，以供熟悉此技藝之人士之瞭解與閱讀，並非用以限定本揭露可實施之限定 條件，故不具技術上之實質意義，任何結構之修飾、比例關係之改變或大小之調整，在不影響本揭露所能產生之功效及所能達成之目的下，均應仍落在本揭露所揭示之技術內容得能涵蓋之範圍內。 It is to be understood that the structure, the proportions, the size and the like of the present invention are only used to clarify the disclosure of the specification for the understanding and reading of those skilled in the art, and are not intended to limit the disclosure. Limited Conditions, so it is not technically meaningful. Any modification of the structure, change of the proportional relationship or adjustment of the size should remain in this disclosure without affecting the effects and the objectives that can be achieved by this disclosure. The technical content revealed can be covered.
一般製程中的高溫粉體進入氣力輸送系統時，固定量的高溫粉體與輸送空氣混合後，其氣流溫度將上升至一穩定終端溫度。若要再提昇溫度，除了調降風量外，亦可增加高溫粉體的輸送量。在調降風量的情形下，由於管線內氣流受粉體傳導熱量而造成體積膨脹，管線內流速將會增加，因此只要依據氣流溫度變化情形，即可在維持氣力輸送條件下，試算出輸送風量的調降裕度，據此可相對提昇固/氣比，進而提昇粉體的終端溫度。又在增加高溫粉體輸送量的情形，在不堵塞管線的情況下，可直接提昇粉體的終端溫度。 When the high-temperature powder in the general process enters the pneumatic conveying system, the temperature of the airflow will rise to a stable terminal temperature after the fixed amount of the high-temperature powder is mixed with the conveying air. In order to raise the temperature again, in addition to reducing the air volume, the amount of high-temperature powder can also be increased. In the case of reducing the air volume, since the airflow in the pipeline is volume-expanded due to the heat conduction of the powder, the flow velocity in the pipeline will increase. Therefore, as long as the airflow temperature changes, the airflow can be calculated under the condition of maintaining the pneumatic conveying. The down-regulation margin, according to which the relative solid/gas ratio can be relatively increased, thereby increasing the terminal temperature of the powder. In addition, in the case of increasing the amount of high-temperature powder transport, the terminal temperature of the powder can be directly increased without clogging the pipeline.
惟在調降風量或粉體輸送量的過程中，必須克服噴嘴流速減慢及管線壓損增加之衍生問題，即必須設計一可自動調節裝置，使進料口維持零負壓或微負壓的氣封狀態，如此系統才能連續的進行進料及輸送，並藉由調節裝置而使粉體操作量及溫度達到製程需求的目的。本揭露之粉體輸送裝置即是為了達成上述目的所設計者。 However, in the process of reducing the air volume or the volume of powder transport, it is necessary to overcome the problem of slowing down the nozzle flow rate and increasing the pressure loss of the pipeline, that is, an automatic adjustment device must be designed to maintain the inlet port with zero negative pressure or micro negative pressure. The gas seal state, so that the system can continuously feed and transport, and the powder operation amount and temperature reach the process demand by adjusting the device. The powder conveying device of the present disclosure is designed to achieve the above object.
請參閱第1圖，本揭露之粉體輸送裝置1主要包括混合管10、氣送噴嘴12與進料管13，以及選擇性再包括調變噴嘴流速單元14。 Referring to FIG. 1, the powder conveying device 1 of the present disclosure mainly includes a mixing tube 10, a gas delivery nozzle 12 and a feeding tube 13, and optionally a modulation nozzle flow rate unit 14.
混合管10一端銜接一具有喉口111之文式管11，另 一端則選擇性地銜接一鼓風機15，其中，該鼓風機15用以提供氣送風20至該混合管10內。於一實施例中，該混合管10及該鼓風機15之間設有風門16，用以控制鼓風機15送入該混合管10內氣送風之風壓及風量。 One end of the mixing tube 10 is connected to a literary tube 11 having a throat 111, and One end selectively connects a blower 15 for providing air supply air 20 into the mixing tube 10. In an embodiment, a damper 16 is disposed between the mixing tube 10 and the blower 15 for controlling the wind pressure and air volume of the air blown into the mixing tube 10 by the blower 15 .
該氣送噴嘴12設於該混合管10內部，且該氣送噴嘴12之口端121位於該文氏管11的喉口111附近，並朝向該喉口111。該氣送噴嘴12為一錐體，口端121即是指該錐體之小截面端，且該氣送噴嘴12之作用是用以導引鼓風機15所提供的氣送風20吹向喉口111。於一實施例中，該混合管10、該氣送噴嘴12及該文氏管11是串接於同一軸線Y上，此軸線Y與軸線X(舉例為水平)之間設有一角度θ 1。 The gas delivery nozzle 12 is disposed inside the mixing tube 10, and the mouth end 121 of the gas delivery nozzle 12 is located near the throat 111 of the venturi 11 and faces the throat 111. The gas delivery nozzle 12 is a cone, and the mouth end 121 refers to a small section end of the cone, and the air delivery nozzle 12 functions to guide the air supply air 20 provided by the air blower 15 to the throat 111. . In one embodiment, the mixing tube 10, the gas delivery nozzle 12 and the venturi 11 are connected in series on the same axis Y, and an angle θ 1 is provided between the axis Y and the axis X (for example, horizontal).
該進料管13自上方接入該混合管10，具體位於該氣送噴嘴12之上方，以使粉體18可經由該進料管13以重力方式垂直落下至該氣送噴嘴12之口端121附近或進入文氏管11。其中，該進料管13與該混合管10之間設有一角度θ 2，即進料管13之軸線Z(舉例為垂直)與混合管10之軸線Y之間設有一角度θ 2。於一實施例中，該θ 2角度可自0度至90度之間選擇一合適者，通常不是0度或90度，第1圖中雖舉例為45度，但本揭露並不以此為限。 The feed pipe 13 is connected to the mixing pipe 10 from above, specifically above the gas delivery nozzle 12, so that the powder 18 can be vertically dropped to the mouth end of the gas delivery nozzle 12 via the feed pipe 13 by gravity. Near 121 or into the venturi tube 11. An angle θ 2 is provided between the feed pipe 13 and the mixing pipe 10, that is, an angle θ 2 is formed between the axis Z of the feed pipe 13 (for example, vertical) and the axis Y of the mixing pipe 10. In an embodiment, the θ 2 angle may select a suitable one from 0 degrees to 90 degrees, usually not 0 degrees or 90 degrees, and although 45 degrees is exemplified in FIG. 1 , the disclosure is not limit.
調變噴嘴流速單元14，為一選擇性設備，舉例設置於氣送噴嘴12之內，用以調整鼓風機15所提供之氣送風20於氣送噴嘴12中的氣流流速。於一實施例中，調變噴嘴流速單元14包括滑動螺桿141、至少一螺帽軸承142、塞頭 143、撓性曲軸144及轉動裝置145。 The modulating nozzle flow rate unit 14 is an optional device, for example, disposed within the air delivery nozzle 12 for adjusting the flow rate of the air supply 20 provided by the blower 15 in the air delivery nozzle 12. In one embodiment, the modulated nozzle flow rate unit 14 includes a sliding screw 141, at least one nut bearing 142, and a plug. 143. Flexible crankshaft 144 and rotating device 145.
滑動螺桿141具有螺紋結構，該螺紋結構相對螺合於螺帽軸承142，螺帽軸承142則固定於該氣送噴嘴12之內壁上，因此，可透過轉動滑動螺桿141之方式，使滑動螺桿141相對螺帽軸承142於氣送噴嘴12中往復位移。 The sliding screw 141 has a threaded structure, the threaded structure is relatively screwed to the nut bearing 142, and the nut bearing 142 is fixed to the inner wall of the air sending nozzle 12, so that the sliding screw can be rotated by rotating the sliding screw 141 The 141 is reciprocally displaced relative to the nut bearing 142 in the air delivery nozzle 12.
塞頭143設置於滑動螺桿141之一端，且位於該氣送噴嘴12之口端121附近。於一實施例中，該塞頭143為橢圓體或錐體。當塞頭143隨滑動螺桿141相對於氣送噴嘴12中以前後方向往復位移時，使得氣送噴嘴12之口端121的出風口面積隨著塞頭143之往復位移而有所改變。亦即，藉由塞頭143於氣送噴嘴12之口端121的位置，進而改變氣送噴嘴12之口端121的出風口面積，而能夠調整該鼓風機15所提供之氣送風20於氣送噴嘴12中的氣流流速與流量。 The plug head 143 is disposed at one end of the slide screw 141 and is located near the mouth end 121 of the air delivery nozzle 12. In one embodiment, the plug 143 is an ellipsoid or a cone. When the plug head 143 is reciprocally displaced with respect to the sliding screw 141 with respect to the front and rear directions of the air delivery nozzle 12, the air outlet area of the mouth end 121 of the air delivery nozzle 12 is changed in accordance with the reciprocal displacement of the plug head 143. That is, by the position of the plug head 143 at the mouth end 121 of the air delivery nozzle 12, and thereby changing the air outlet area of the mouth end 121 of the air delivery nozzle 12, the air supply air 20 provided by the air blower 15 can be adjusted for air delivery. Air flow rate and flow rate in nozzle 12.
撓性曲軸144之一端連接滑動螺桿141，另一端連接到位於混合管10外部之轉動裝置145，該轉動裝置145具體可為轉動盤。藉由轉動裝置145轉動該撓性曲軸144而連動滑動螺桿141，使得滑動螺桿141相對螺帽軸承142於氣送噴嘴12中往復位移。 One end of the flexible crankshaft 144 is connected to the slide screw 141, and the other end is connected to a rotating device 145 located outside the mixing tube 10. The rotating device 145 may specifically be a rotating disk. The sliding screw 141 is interlocked by rotating the flexible crankshaft 144 by the rotating device 145, so that the sliding screw 141 is reciprocally displaced relative to the nut bearing 142 in the air delivery nozzle 12.
於一實施例中，粉體輸送裝置1通常是以如第1圖所示進行設置。詳言之，該粉體輸送裝置1之該文氏管11的軸線Y，是與軸線X夾設一角度θ 1，該角度θ 1可選擇等於或不等於θ 2，第1圖雖舉例為45度，但本揭露並不以此為限。 In one embodiment, the powder delivery device 1 is typically disposed as shown in FIG. In detail, the axis Y of the venturi 11 of the powder conveying device 1 is an angle θ1 with the axis X, and the angle θ 1 can be selected to be equal to or not equal to θ 2 , and the first figure is exemplified as 45 degrees, but this disclosure is not limited to this.
本揭露之粉體輸送裝置1更選擇性地包括一壓力控制器17，該壓力控制器17用以監控進料管13之口端(即進料管13接入於混合管10之處)的負壓條件，並依據該負壓條件來調變氣送噴嘴12之氣流流速，亦即該壓力控制器17可控制轉動裝置145。設置此壓力控制器17之目的在於維持該進料管13之口端能隨時地處於零負壓或微負壓之氣封功能。 The powder conveying device 1 of the present disclosure more selectively includes a pressure controller 17 for monitoring the mouth end of the feed pipe 13 (ie, where the feed pipe 13 is connected to the mixing pipe 10). Under the negative pressure condition, the air flow rate of the air delivery nozzle 12 is modulated according to the negative pressure condition, that is, the pressure controller 17 can control the rotating device 145. The purpose of setting the pressure controller 17 is to maintain the gas seal function of the mouth end of the feed pipe 13 at zero negative pressure or micro negative pressure at any time.
請進一步參閱第2A圖，在固定輸送粉體量為1500kg/hr的情況下，本揭露實施例之粉體終端溫度(即粉體進入進料倉前之溫度)仍可維持在400℃上下，且隨著氣送風量的降低，粉體終端溫度略為上升。另請參閱第2B圖，在固定氣送風量為12.2CMM(立方公尺)的情況下，隨著輸送粉體量的增加(即提高固/氣比)，粉體終端溫度仍可維持在400℃上下。由此可證明本揭露之粉體輸送裝置在降低風量或增加粉體輸送量之改變操作參數時，的確可達到精準控制粉體終端溫度的良好成效。 For further reference to FIG. 2A, in the case where the fixed transporting powder amount is 1500 kg/hr, the powder terminal temperature of the disclosed embodiment (ie, the temperature before the powder enters the feed bin) can be maintained at 400 ° C or so, and As the air supply air volume decreases, the powder terminal temperature rises slightly. Please also refer to Figure 2B. In the case where the fixed air supply volume is 12.2 CMM (m3), the powder terminal temperature can be maintained at 400 as the amount of transported powder increases (ie, the solid/gas ratio is increased). °C up and down. Therefore, it can be proved that the powder conveying device of the present disclosure can achieve a good effect of accurately controlling the temperature of the powder terminal when reducing the air volume or increasing the operating parameter of the powder conveying amount.
本揭露之粉體輸送裝置可透過風門控制風壓及風量，並藉由調變噴嘴流速單元調整氣送噴嘴之氣流流速，且進一步透過壓力控制器來控制該調變噴嘴流速單元，以維持進料口端零負壓或微負壓之氣封功能，即調變風壓、風量及粉體操作量的同時，可自動調變噴嘴流速，藉此控制粉體的終端溫度，並達到連續且穩定的進料及輸送粉體之功效。 The powder conveying device of the present disclosure can control the wind pressure and the air volume through the damper, and adjust the air flow velocity of the air delivery nozzle by adjusting the nozzle flow rate unit, and further control the modulation nozzle flow rate unit through the pressure controller to maintain the flow rate The gas seal function of zero negative pressure or micro negative pressure at the material end, that is, the wind pressure, the air volume and the powder operation amount, can automatically adjust the nozzle flow rate, thereby controlling the terminal temperature of the powder and achieving continuous Stable feed and delivery of powder.
上述實施例僅例示性說明本揭露之原理及其功效，而 非用於限制本揭露。任何熟習此項專業之人士均可在不違背本揭露之精神及範疇下，對上述實施例進行修飾與改變。因此，舉凡所屬技術領域中具有此項專業知識者，在未脫離本揭露所揭示之精神與技術原理下所完成之一切等效修飾或改變，仍應由後述之申請專利範圍所涵蓋。 The above embodiments are merely illustrative of the principles of the disclosure and its effects, and It is not intended to limit the disclosure. Any person skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the disclosure. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and scope of the invention disclosed herein are still covered by the appended claims.
1‧‧‧粉體輸送裝置 1‧‧‧Powder conveyor
10‧‧‧混合管 10‧‧‧Mixed tube
11‧‧‧文氏管 11‧‧‧ Venturi tube
111‧‧‧喉口 111‧‧‧ throat
12‧‧‧氣送噴嘴 12‧‧‧Air delivery nozzle
121‧‧‧口端 121‧‧‧ mouth
13‧‧‧進料管 13‧‧‧ Feeding tube
14‧‧‧調變噴嘴流速單元 14‧‧‧Modulated nozzle flow rate unit
141‧‧‧滑動螺桿 141‧‧‧Sliding screw
142‧‧‧螺帽軸承 142‧‧‧ Nut bearing
143‧‧‧塞頭 143‧‧‧ 塞头
144‧‧‧撓性曲軸 144‧‧‧Flexible crankshaft
145‧‧‧轉動裝置 145‧‧‧Rotating device
15‧‧‧鼓風機 15‧‧‧Blowers
16‧‧‧風門 16‧‧‧ damper
17‧‧‧壓力控制器 17‧‧‧ Pressure controller
18、19‧‧‧粉體 18, 19‧‧‧ powder
20‧‧‧氣送風 20‧‧‧Air supply
X、Y、Z‧‧‧軸線 X, Y, Z‧‧‧ axis
θ 1、θ 2‧‧‧角度 θ 1 , θ 2‧‧‧ angle
Claims (10)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| TW104138709A TWI552941B (en) | 2015-11-23 | 2015-11-23 | Device for transportation of powder |
| CN201510973202.9A CN106743668B (en) | 2015-11-23 | 2015-12-22 | Powder conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104138709A TWI552941B (en) | 2015-11-23 | 2015-11-23 | Device for transportation of powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TWI552941B TWI552941B (en) | 2016-10-11 |
| TW201718378A true TW201718378A (en) | 2017-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| TW104138709A TWI552941B (en) | 2015-11-23 | 2015-11-23 | Device for transportation of powder |
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| CN (1) | CN106743668B (en) |
| TW (1) | TWI552941B (en) |
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| TWI698387B (en) * | 2019-11-15 | 2020-07-11 | 財團法人工業技術研究院 | Powder and granule transport device |
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| TWI698387B (en) * | 2019-11-15 | 2020-07-11 | 財團法人工業技術研究院 | Powder and granule transport device |
| CN112811185A (en) * | 2019-11-15 | 2021-05-18 | 财团法人工业技术研究院 | Powder conveying device |
| CN112811185B (en) * | 2019-11-15 | 2022-07-01 | 财团法人工业技术研究院 | Powder conveying device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106743668A (en) | 2017-05-31 |
| TWI552941B (en) | 2016-10-11 |
| CN106743668B (en) | 2018-11-30 |
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