JP2008272703A - Method of cleaning inside of piping of pneumatic conveyor and pneumatic conveyor - Google Patents

Method of cleaning inside of piping of pneumatic conveyor and pneumatic conveyor Download PDF

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JP2008272703A
JP2008272703A JP2007121865A JP2007121865A JP2008272703A JP 2008272703 A JP2008272703 A JP 2008272703A JP 2007121865 A JP2007121865 A JP 2007121865A JP 2007121865 A JP2007121865 A JP 2007121865A JP 2008272703 A JP2008272703 A JP 2008272703A
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air
cleaning liquid
pipe
cleaning
transport pipe
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Nobuhiko Shiromaru
信彦 白丸
Masaaki Miyamoto
昌明 宮本
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Hitachi Plant Technologies Ltd
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Hitachi Plant Technologies Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To clean transportation piping without performing the work of disassembling the transportation piping and without filling a cleaning liquid inside the transportation piping. <P>SOLUTION: The method of cleaning the inside of the piping of the pneumatic conveyor is for cleaning the inside of the transportation piping 12 of the pneumatic conveyor 10 which transports particulates by forced feed air or suction air, air and the cleaning liquid are simultaneously supplied into the transportation piping 12, and the inside of the transportation piping 12 is cleaned by the air and the cleaning liquid. The pneumatic conveyor 10 comprises, for instance, a motor-driven valve 36 for the air for switching whether or not to supply the air into the transportation piping 12, a motor-driven valve 46 for the cleaning liquid for switching whether or not to supply a cleaning liquid amount into the transportation piping 12, and a control part 50 for controlling the motor-driven valve 36 for the air and the motor-driven valve 46 for the cleaning liquid and simultaneously supplying the air and the cleaning liquid into the transportation piping 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は空気輸送装置の配管内洗浄方法および空気輸送装置に係り、特に圧送エアーまたは吸引エアーにより粉粒状食品などの粉粒体をサイクロンまたはタンクなどの輸送先に輸送する空気輸送装置の配管内洗浄方法および空気輸送装置に関する。   The present invention relates to a method for cleaning an inside of a pipe of an air transportation device and an air transportation device, and more particularly, to the inside of a piping of an air transportation device that transports a granular material such as granular food to a transportation destination such as a cyclone or a tank by compressed air or suction air The present invention relates to a cleaning method and a pneumatic transportation device.

図５に従来の空気輸送装置９１０の例を示す。この空気輸送装置９１０は、輸送配管１２、ブロア室２１に設置したブロア２２、ホッパ２３、ロータリフィーダ２４、サイクロン２６、タンク２７、および、集塵装置２８を含んで、構成されている。   FIG. 5 shows an example of a conventional pneumatic transport device 910. The pneumatic transport device 910 includes a transport pipe 12, a blower 22 installed in the blower chamber 21, a hopper 23, a rotary feeder 24, a cyclone 26, a tank 27, and a dust collector 28.

輸送物である材料や製品等の粉粒体８を輸送するために、ブロア室２１に設置されたブロア２２から供給される圧送エアーを利用し、ホッパ２３からロータリフィーダ２４を介して輸送配管１２に供給される粉粒体８を、輸送先のサイクロン２６まで輸送する。サイクロン２６によって粉粒体８と圧縮エアーとが分離され、圧縮エアーは集塵装置２８を介して放出エアー９として系外に放出される。サイクロン２６まで輸送された粉粒体８は、本例ではタンク２７に貯蔵されるが、図示を省略した製造装置に供給される場合もある。   In order to transport the granular material 8 such as a material or product which is a transported material, the transport pipe 12 is supplied from the hopper 23 via the rotary feeder 24 using the pressurized air supplied from the blower 22 installed in the blower chamber 21. The granular material 8 to be supplied to is transported to the cyclone 26 of the transport destination. The granular material 8 and the compressed air are separated by the cyclone 26, and the compressed air is discharged out of the system as the discharge air 9 through the dust collector 28. The granular material 8 transported to the cyclone 26 is stored in the tank 27 in this example, but may be supplied to a manufacturing apparatus (not shown).

このような空気輸送装置９１０を連続して運転すると、図６に示すように、輸送配管１２やその途中にある継手の段差、ベンド等に空気抵抗を生じ、輸送している粉粒体８が輸送配管１２の内面に付着する。輸送量が増加して、輸送配管１２の内面に付着した粉粒体８が堆積すると、付着堆積物９２を栄養源に微生物が発生し衛生上の問題が生じる。このため、輸送配管１２の内面を定期的に清掃する必要があり、その清掃方法として、粉粒体８の輸送を一旦止めてから輸送配管１２を解体して手作業により清掃を行い、清掃終了後に解体した配管を元通りに組み立てる方法が一般的に用いられている。   When such an air transport device 910 is continuously operated, as shown in FIG. 6, as shown in FIG. 6, air resistance is generated in the transport pipe 12 or a joint step, a bend or the like in the middle of the transport pipe 12. It adheres to the inner surface of the transport pipe 12. When the transport amount increases and the granular material 8 attached to the inner surface of the transport pipe 12 is deposited, microorganisms are generated using the attached deposit 92 as a nutrient source, resulting in a sanitary problem. For this reason, it is necessary to periodically clean the inner surface of the transport pipe 12. As a cleaning method, the transport of the powder 8 is temporarily stopped, the transport pipe 12 is dismantled and cleaned manually, and the cleaning is completed. A method of reassembling a pipe disassembled later is generally used.

また、特許文献１には、輸送配管の一端または両端を閉塞させた後に輸送配管の内部に洗浄液を充満させ圧送することにより輸送配管の内面を洗浄する方法が記載されている。   Patent Document 1 describes a method of cleaning the inner surface of a transport pipe by closing one end or both ends of the transport pipe and then filling the inside of the transport pipe with a cleaning liquid and pumping it.

なお、特許文献２には、粉粒体の空気輸送において、輸送配管中を移動している粉粒体に対して液体や水蒸気を添加する空気輸送方法が記載されている。
特開２００４―２４４２０６号公報 特開２００５―２３１７５３号公報 Patent Document 2 describes an air transportation method in which liquid or water vapor is added to a granular material moving in a transportation pipe in pneumatic transportation of the granular material.
JP 2004-244206 A JP 2005-231753 A

しかし、輸送配管を解体して手作業により清掃を行う方法は、多くの人手、労力および時間を要するので、輸送配管内の清掃作業にかかるコストを増加させる欠点がある。また、輸送配管が高所に設けられていると、解体、組立作業時に作業者の危険を伴う。   However, the method of dismantling the transportation pipe and manually cleaning it requires a lot of manpower, labor and time, and therefore has the disadvantage of increasing the cost for cleaning the transportation pipe. In addition, if the transportation piping is provided at a high place, there is a danger of workers during dismantling and assembling work.

一方、輸送配管の一端または両端を閉塞させた後に輸送配管の内部に洗浄液を充満させ圧送する方法では、輸送配管の内部に充満させた洗浄液を圧送するために大容量のポンプを必要とするので、装置が大掛かりになるという欠点がある。   On the other hand, in the method in which one end or both ends of the transport pipe is closed and then the cleaning liquid is filled and pumped in the transport pipe, a large capacity pump is required to pump the cleaning liquid filled in the transport pipe. There is a drawback that the apparatus becomes large.

本発明は、前記従来技術の欠点を解消し、輸送配管を解体する作業をすることなく、かつ、輸送配管の内部に洗浄液を充満させることなく、輸送配管内を洗浄することができる空気輸送配管の配管内洗浄方法を提供することを目的とする。   The present invention eliminates the disadvantages of the prior art, and does not disassemble the transport pipe, and can clean the interior of the transport pipe without filling the cleaning liquid with the cleaning liquid. The purpose is to provide a method for cleaning the inside of a pipe.

前記目的を達成するために、請求項１に記載の発明は、圧送エアーまたは吸引エアーにより粉粒体を輸送する空気輸送装置の輸送配管内を洗浄する空気輸送装置の配管内洗浄方法であって、前記輸送配管内に空気と洗浄液とを同時に供給して前記空気と前記洗浄液とにより前記輸送配管内を洗浄することを特徴とする空気輸送装置の配管内洗浄方法を提供する。   In order to achieve the above object, the invention according to claim 1 is a method for cleaning an in-pipe of an air transport device for cleaning an inside of a transport tube of an air transport device for transporting a granular material by compressed air or suction air. A method for cleaning a pipe in an air transportation apparatus is provided, wherein air and a cleaning liquid are simultaneously supplied into the transport pipe and the inside of the transport pipe is cleaned with the air and the cleaning liquid.

請求項２に記載の発明は、請求項１に記載の発明において、前記輸送配管に供給する洗浄液量は空気量に対して質量比で６乃至１８倍であることを特徴とする空気輸送装置の配管内洗浄方法。   According to a second aspect of the present invention, in the first aspect of the present invention, the amount of cleaning liquid supplied to the transport pipe is 6 to 18 times the mass ratio of the air amount. In-pipe cleaning method.

請求項３に記載の発明は、請求項２に記載の発明において、前記空気の流量および前記洗浄液の流量のうちで少なくとも一方を検知し、前記空気の流量に適合した洗浄液量に調整することを特徴とする空気輸送装置の配管内洗浄方法を提供する。   According to a third aspect of the present invention, in the second aspect of the present invention, at least one of the flow rate of the air and the flow rate of the cleaning liquid is detected and adjusted to a cleaning liquid amount suitable for the flow rate of the air. Provided is a method for cleaning a pipe of a pneumatic transport device.

請求項４に記載の発明は、請求項１ないし３のいずれか１項に記載の発明において、前記輸送配管内に粉粒体を供給するためのホッパよりも空気供給側の位置から、前記輸送配管内に洗浄液を供給することを特徴とする空気輸送装置の配管内洗浄方法を提供する。   The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the transportation is performed from a position closer to the air supply side than a hopper for supplying the granular material into the transportation pipe. Provided is a method for cleaning a pipe of an air transportation device, wherein a cleaning liquid is supplied into the pipe.

請求項５に記載の発明は、請求項１ないし４のいずれか１項に記載の発明において、前記輸送配管内に粉粒体を供給するためのホッパから、前記輸送配管内に洗浄液を供給することを特徴とする空気輸送装置の配管内洗浄方法を提供する。   According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the cleaning liquid is supplied into the transport pipe from a hopper for supplying the granular material into the transport pipe. An in-pipe cleaning method for a pneumatic transport device is provided.

請求項６に記載の発明は、圧送エアーまたは吸引エアーにより粉粒体を輸送するための輸送配管と、前記輸送配管内に空気を供給するか否かを切り換える第１の切換手段と、前記輸送配管内に洗浄液量を供給するか否かを切り換える第２の切換手段と、前記第１の切換手段および第２の切換手段を制御して、前記輸送配管内に空気と洗浄液とを同時に供給する制御手段と、を備え、前記空気と前記洗浄液とにより前記輸送配管内が洗浄されるようにしたことを特徴とする空気輸送装置を提供する。   The invention according to claim 6 is a transport pipe for transporting the granular material by compressed air or suction air, a first switching means for switching whether to supply air into the transport pipe, and the transport The second switching means for switching whether or not the cleaning liquid amount is supplied into the pipe and the first switching means and the second switching means are controlled to supply air and cleaning liquid into the transport pipe at the same time. And a control means, wherein the inside of the transport pipe is cleaned by the air and the cleaning liquid.

本発明によれば、輸送配管を解体する作業をすることなく、かつ、輸送配管の内部に洗浄液を充満させることなく、輸送配管内を洗浄することができる。   ADVANTAGE OF THE INVENTION According to this invention, the inside of transport piping can be wash | cleaned, without carrying out the operation | work which disassembles transport piping and filling a cleaning liquid in the inside of transport piping.

以下、添付図面に従って、本発明の実施形態について、詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

図１は、本発明に係る空気輸送装置の一実施形態の例を示す全体構成図である。   FIG. 1 is an overall configuration diagram showing an example of an embodiment of a pneumatic transport device according to the present invention.

図１において、本実施形態の一例としての空気輸送装置１０は、図５に示した従来の空気輸送装置９１０と同様に、輸送配管１２と、圧送エアー（以下単に「空気」という）の供給源としてブロア室２１に設置したブロア２２と、粉粒体８の供給源としてのホッパ２３と、ホッパ２３内の粉粒体８を輸送配管１２へ送出するロータリフィーダ２４と、輸送配管１２を介して空気とともに輸送された粉粒体８を空気から分離するサイクロン２６と、サイクロン２６で分離された粉粒体８を貯蔵するタンク２７と、サイクロン２６で分離された空気から塵を除去して放出エアー９として系外へ放出する集塵装置２８を含んで、構成されている。   In FIG. 1, an air transportation device 10 as an example of the present embodiment is similar to the conventional air transportation device 910 illustrated in FIG. 5, and includes a transportation pipe 12 and a supply source of compressed air (hereinafter simply referred to as “air”). As a blower 22 installed in the blower chamber 21, a hopper 23 as a supply source of the granular material 8, a rotary feeder 24 for sending the granular material 8 in the hopper 23 to the transport pipe 12, and the transport pipe 12 The cyclone 26 that separates the granular material 8 transported with the air from the air, the tank 27 that stores the granular material 8 separated by the cyclone 26, and the air that is released by removing dust from the air separated by the cyclone 26. 9 includes a dust collector 28 that discharges to the outside of the system.

以下では、ホッパ２３に連通しているホッパ連通口１４（粉粒体流入口）からサイクロン２６まで至る配管を輸送配管１２といい、ブロア２２からホッパ連通口１４まで至る配管を空気供給配管３０という。このように輸送配管１２および空気供給配管３０は、説明の便宜上、ホッパ連通口１４を境界にして分けて説明するが、実際には、ブロア２２からサイクロン２６まで至る一連の配管として構成されている。   Hereinafter, the pipe from the hopper communication port 14 (powder inlet) communicating with the hopper 23 to the cyclone 26 is referred to as a transport pipe 12, and the pipe from the blower 22 to the hopper communication port 14 is referred to as an air supply pipe 30. . As described above, the transport pipe 12 and the air supply pipe 30 are described separately with the hopper communication port 14 as a boundary for the sake of convenience of explanation. In practice, however, the transport pipe 12 and the air supply pipe 30 are configured as a series of pipes from the blower 22 to the cyclone 26. .

本実施形態の空気輸送装置１０は、ホッパ２３よりも手前の空気供給側（空気流の上流側である）の位置に設けられている洗浄液供給部１６と、空気供給配管３０に設けられている空気用流量計３４および空気用電動弁３６と、洗浄液が流れる洗浄液供給配管４０と、洗浄液供給配管４０に設けられている洗浄液用流量計４４および洗浄液用電動弁４６と、洗浄液貯蔵用タンクなどの洗浄液供給源４８と、マイクロコンピュータなどの制御部５０と、メモリなどの記憶部５２を含んで、構成されている。   The pneumatic transport apparatus 10 of the present embodiment is provided in the cleaning liquid supply unit 16 and the air supply pipe 30 provided at a position on the air supply side (on the upstream side of the air flow) before the hopper 23. The air flow meter 34 and the air motor operated valve 36, the cleaning liquid supply pipe 40 through which the cleaning liquid flows, the cleaning liquid flow meter 44 and the cleaning liquid electric valve 46 provided in the cleaning liquid supply pipe 40, the cleaning liquid storage tank, etc. It includes a cleaning liquid supply source 48, a control unit 50 such as a microcomputer, and a storage unit 52 such as a memory.

洗浄液供給配管４０は、洗浄液供給源４８から洗浄液供給部１６まで至る配管である。洗浄液は、洗浄液供給源４８から洗浄液供給配管４０を通り、洗浄液供給部１６を介してホッパ連通口１４の近傍で空気供給配管３０に注入されて輸送配管１２に供給される。   The cleaning liquid supply pipe 40 is a pipe from the cleaning liquid supply source 48 to the cleaning liquid supply unit 16. The cleaning liquid passes from the cleaning liquid supply source 48 through the cleaning liquid supply pipe 40, is injected into the air supply pipe 30 near the hopper communication port 14 via the cleaning liquid supply unit 16, and is supplied to the transport pipe 12.

本例では、洗浄液供給部１６は、ホッパ連通口１４の近傍に設けられているが、このような場合に特に限定されず、ホッパ連通口１４よりも手前の空気供給側（空気流の上流側である）の位置に配置されていればよい。   In this example, the cleaning liquid supply unit 16 is provided in the vicinity of the hopper communication port 14, but is not particularly limited to such a case, and the air supply side (upstream side of the air flow) in front of the hopper communication port 14 is not limited thereto. ).

空気用流量計３４および空気用電動弁３６は、洗浄液供給部１６よりもさらに手前に配置されている。   The air flow meter 34 and the air motor operated valve 36 are disposed further in front of the cleaning liquid supply unit 16.

空気用流量計３４は、空気供給配管３０内の空気の流量を計測することにより、輸送配管１２へ供給される空気量（すなわち輸送配管１２内の空気の流量）を検知する。   The air flow meter 34 detects the amount of air supplied to the transport pipe 12 (that is, the flow rate of air in the transport pipe 12) by measuring the flow rate of air in the air supply pipe 30.

空気用電動弁３６は、空気供給配管３０を開閉することにより輸送配管１２に空気を供給するか否かを切り換える空気供給切換手段として機能するとともに、空気供給配管３０内の空気の流量を調整することにより輸送配管１２に供給される空気量（すなわち輸送配管１２内の空気の流量）を調整する空気流量調整手段として機能する。   The air motor-operated valve 36 functions as an air supply switching unit that switches whether air is supplied to the transport pipe 12 by opening and closing the air supply pipe 30 and adjusts the flow rate of air in the air supply pipe 30. This functions as an air flow rate adjusting means for adjusting the amount of air supplied to the transport pipe 12 (that is, the flow rate of air in the transport pipe 12).

洗浄液用流量計４４は、洗浄液供給配管４０内の洗浄液の流量を計測することにより、輸送配管１２に供給される洗浄液量（すなわち輸送配管１２内の洗浄液の流量）を検知する。   The cleaning liquid flow meter 44 detects the amount of cleaning liquid supplied to the transport pipe 12 (that is, the flow rate of cleaning liquid in the transport pipe 12) by measuring the flow rate of the cleaning liquid in the cleaning liquid supply pipe 40.

洗浄液用電動弁４６は、洗浄液供給配管４０を開閉することにより輸送配管１２に洗浄液を供給するか否かを切り換える洗浄液供給切換手段として機能するとともに、洗浄液供給配管４０内の洗浄液の流量を調整させることにより輸送配管１２に供給される洗浄液量（すなわち輸送配管１２内の洗浄液の流量）を調整する洗浄液流量調整手段として機能する。   The cleaning liquid motor-operated valve 46 functions as a cleaning liquid supply switching unit that switches whether or not the cleaning liquid is supplied to the transport pipe 12 by opening and closing the cleaning liquid supply pipe 40 and adjusts the flow rate of the cleaning liquid in the cleaning liquid supply pipe 40. Thus, it functions as a cleaning liquid flow rate adjusting means for adjusting the amount of cleaning liquid supplied to the transport pipe 12 (that is, the flow rate of the cleaning liquid in the transport pipe 12).

制御部５０は、空気用電動弁３６を用いた空気供給配管３０の開閉、および、洗浄液用電動弁４６を用いた洗浄液供給配管４０の開閉を行う。また、制御部５０は、空気用流量計３４によって検知された空気量および洗浄液用流量計４４によって検知された洗浄液量の少なくとも一方に基づいて、空気用電動弁３６による空気の流量調整および／または洗浄液用電動弁４６による洗浄液の流量調整を行う。   The control unit 50 opens and closes the air supply pipe 30 using the air motor operated valve 36 and opens and closes the cleaning liquid supply pipe 40 using the cleaning liquid motor operated valve 46. Further, the control unit 50 adjusts the air flow rate by the air motor-operated valve 36 and / or based on at least one of the air amount detected by the air flow meter 34 and the cleaning liquid amount detected by the cleaning liquid flow meter 44. The cleaning liquid flow rate is adjusted by the cleaning liquid motor-operated valve 46.

記憶部５２は、制御部５０によって実行されるプログラムや、制御部５０の処理に必要な情報を、記憶する。   The storage unit 52 stores a program executed by the control unit 50 and information necessary for processing of the control unit 50.

図２は、本実施形態における洗浄液供給部１６の詳細を示す。洗浄液供給部１６は、輸送配管１２へ洗浄液を供給する側とは反対側に、洗浄液ノズル７０を備えている。洗浄液ノズル７０はパッキン７１を介してクランプ７２で固定されている。また、洗浄液ノズル７０は締結部７３によって洗浄液供給配管４０に連結されている。   FIG. 2 shows details of the cleaning liquid supply unit 16 in the present embodiment. The cleaning liquid supply unit 16 includes a cleaning liquid nozzle 70 on the side opposite to the side where the cleaning liquid is supplied to the transport pipe 12. The cleaning liquid nozzle 70 is fixed by a clamp 72 via a packing 71. The cleaning liquid nozzle 70 is connected to the cleaning liquid supply pipe 40 by a fastening portion 73.

まず、粉粒体８の空気輸送処理について、図１を用いて説明する。   First, the pneumatic transportation process of the granular material 8 is demonstrated using FIG.

粉粒体８の空気輸送を行う場合には、洗浄液用電動弁４６を閉じ且つ空気用電動弁３６を開いた状態で、ブロア２２から供給される空気をキャリアとして、ホッパ２３からロータリフィーダ２４により輸送配管１２内に供給される粉粒体８をサイクロン２６まで輸送する。サイクロン２６によって粉粒体８と空気とが分離され、空気は集塵装置２８を介して放出エアー９として系外に放出される。粉粒体８は、本例ではタンク２７に貯蔵されるが、図示を省略した製造装置に供給される場合もある。   When pneumatically transporting the granular material 8, the cleaning liquid motor-operated valve 46 is closed and the air motor-operated valve 36 is opened, and the air supplied from the blower 22 is used as a carrier by the rotary feeder 24 from the hopper 23. The granular material 8 supplied into the transport pipe 12 is transported to the cyclone 26. The granular material 8 and air are separated by the cyclone 26, and the air is discharged out of the system as the discharge air 9 through the dust collector 28. Although the granular material 8 is stored in the tank 27 in this example, it may be supplied to a manufacturing apparatus (not shown).

次に、輸送配管１２内の洗浄処理について、図１を用いて説明する。   Next, the cleaning process in the transport pipe 12 will be described with reference to FIG.

輸送配管１２内の洗浄を行う場合には、ホッパ２３からのロータリフィーダ２４による粉粒体８の供給は停止し、空気用電動弁３６および洗浄液用電動弁４６を開き、ブロア２２から空気供給配管３０を介して輸送配管１２内に空気を供給すると同時に、洗浄液供給部１６から空気供給配管３０の一部を介して輸送配管１２内に洗浄液を供給する。すなわち、輸送配管１２内に空気と洗浄液とを同時に供給して、空気と洗浄液とにより輸送配管１２内を洗浄する。   When cleaning the inside of the transport pipe 12, the supply of the granular material 8 by the rotary feeder 24 from the hopper 23 is stopped, the air motor valve 36 and the cleaning liquid motor valve 46 are opened, and the air supply pipe from the blower 22 is opened. At the same time as supplying air into the transport pipe 12 through 30, the cleaning liquid is supplied from the cleaning liquid supply unit 16 into the transport pipe 12 through a part of the air supply pipe 30. That is, air and a cleaning liquid are simultaneously supplied into the transport pipe 12, and the inside of the transport pipe 12 is cleaned with the air and the cleaning liquid.

ここで、空気用流量計３４および洗浄液用流量計４４のうちで少なくとも一方で検知された流量に基づいて、輸送配管１２内の空気の流量に適合した量に輸送配管１２内の洗浄液の流量を調整する。   Here, based on the flow rate detected by at least one of the air flow meter 34 and the cleaning liquid flow meter 44, the flow rate of the cleaning liquid in the transport pipe 12 is adjusted to an amount suitable for the air flow rate in the transport pipe 12. adjust.

一例について説明すると、まず、ブロア２２より送風を行い、制御部５０は、空気用流量計３４により検知された空気の流量に適合する洗浄液の流量となるように洗浄液用電動弁４６を開閉して、輸送配管１２内に洗浄液を供給する。さらに、洗浄液用流量計４４によって洗浄液の流量を検知し、過不足のある場合には、洗浄液用電動弁４６を用いて調整する。このような調整動作を、適合する洗浄液量となるまで行う。   For example, first, air is blown from the blower 22, and the control unit 50 opens and closes the cleaning liquid motor-operated valve 46 so that the flow rate of the cleaning liquid matches the flow rate of air detected by the air flow meter 34. Then, the cleaning liquid is supplied into the transport pipe 12. Further, the flow rate of the cleaning liquid is detected by the cleaning liquid flow meter 44, and when there is an excess or shortage, the cleaning liquid motor-operated valve 46 is used for adjustment. Such an adjustment operation is performed until a suitable cleaning liquid amount is obtained.

空気量の適正範囲を示す情報と、空気の流量とそれに適合する洗浄液の流量との対応関係を示すテーブル情報とが、記憶部５２に予め記憶されている場合には、制御部５０は記憶部５２に記憶されている情報を参照して、空気の流量および洗浄液の流量の調整を行う。これにより、適正範囲内の流量の空気と、その空気の流量に適合する流量の洗浄液とが、同時に輸送配管１２内に供給されて、輸送配管１２内の洗浄が可能となる。   When information indicating the appropriate range of the air amount and table information indicating the correspondence between the flow rate of air and the flow rate of the cleaning liquid adapted thereto are stored in the storage unit 52 in advance, the control unit 50 stores the storage unit. With reference to the information stored in 52, the air flow rate and the cleaning liquid flow rate are adjusted. As a result, air having a flow rate within an appropriate range and a cleaning liquid having a flow rate suitable for the flow rate of the air are simultaneously supplied into the transport pipe 12 so that the transport pipe 12 can be cleaned.

輸送配管１２内の洗浄状況の例を図３（ａ）〜（ｃ）に示す。輸送配管１２内の空気の流量に対して輸送配管１２内の洗浄液の流量が少ない場合には、図３（ａ）に示すように、輸送配管１２の底部には洗浄液は流れるが、輸送配管１２の上部には洗浄液が流れない。また、輸送配管１２内の空気の流量に対して輸送配管１２の洗浄液の流量が多い場合には、図３（ｂ）に示すように、洗浄液が輸送配管１２内を逆流する。輸送配管１２内の空気の流量に対して輸送配管１２内の洗浄液の流量が適合する場合には、図３（ｃ）に示すように、輸送配管１２内に供給された洗浄液の一部が液滴となると共に、輸送配管１２の底部および上部に洗浄液の順方向（ホッパ連通口１４からサイクロン２６へ向う方向である）の流れが生じて、良好な洗浄が可能となる。このような適合する洗浄液（例えば水）の量は、空気量に対する質量比で、６〜１８倍程度である。ここで、水の比重は「１」であり、空気の比重は「０．００１２９」である。   The example of the washing | cleaning condition in the transport piping 12 is shown to Fig.3 (a)-(c). When the flow rate of the cleaning liquid in the transport pipe 12 is smaller than the flow rate of air in the transport pipe 12, the cleaning liquid flows to the bottom of the transport pipe 12 as shown in FIG. The cleaning liquid does not flow on the top. When the flow rate of the cleaning liquid in the transport pipe 12 is larger than the flow rate of air in the transport pipe 12, the cleaning liquid flows backward in the transport pipe 12 as shown in FIG. When the flow rate of the cleaning liquid in the transport pipe 12 matches the flow rate of air in the transport pipe 12, as shown in FIG. 3C, a part of the cleaning liquid supplied into the transport pipe 12 is liquid. In addition to droplets, a forward flow of the cleaning liquid (in the direction from the hopper communication port 14 toward the cyclone 26) is generated at the bottom and top of the transport pipe 12, thereby enabling good cleaning. The amount of such a suitable cleaning liquid (for example, water) is about 6 to 18 times as a mass ratio with respect to the amount of air. Here, the specific gravity of water is “1”, and the specific gravity of air is “0.00129”.

輸送配管１２内の流量検知と輸送配管１２内の流量調整との対応関係について簡単に整理すると、第１に、空気の流量検知および洗浄液の流量検知と、空気の流量調整および洗浄液の流量調整とを全て行う態様、第２に、空気の流量検知および洗浄液の流量検知と、空気の流量調整とを行う態様、第３に、空気の流量検知および洗浄液の流量検知と、洗浄水の流量調整とを行う態様、第４に、空気の流量が略一定であり、洗浄液の流量検知および洗浄液の流量調整を行う態様、第５に、洗浄水の流量が略一定であり、空気の流量検知および空気の流量調整を行う態様、第６に、空気の流量および洗浄水の流量が略一定であり、流量検知および流量調整を省略して、弁の開閉のみ行う態様、などがある。   The correspondence between the flow rate detection in the transport pipe 12 and the flow rate adjustment in the transport pipe 12 can be summarized as follows. First, the air flow rate detection and the cleaning liquid flow rate detection, the air flow rate adjustment and the cleaning liquid flow rate adjustment A mode in which all of the above are performed, secondly, an air flow rate detection and cleaning liquid flow rate detection, and an air flow rate adjustment, and third, an air flow rate detection and a cleaning liquid flow rate detection, and a cleaning water flow rate adjustment 4th, the mode in which the flow rate of air is substantially constant, the flow rate detection of the cleaning liquid and the flow rate adjustment of the cleaning liquid are performed, and the fifth mode, the flow rate of cleaning water is substantially constant, the flow rate detection of air and air And sixth, there is a mode in which the air flow rate and the washing water flow rate are substantially constant, and the flow rate detection and flow rate adjustment are omitted, and the valve is only opened and closed.

各種の粉粒体（糖類、小麦粉、全卵粉末）で実験を実施した。その条件を以下に示す。
洗浄液：水（温水４０℃）
空気の流量：１．６ｍ３／分（１．９２ｋｇ／分）
洗浄液の流量：２０リットル／分（２０ｋｇ／分）
洗浄時間：２．５分
なお、洗浄液は、水である場合に特に限定されず、薬液を使用する場合もある。 Experiments were conducted with various powders (sugar, wheat flour, whole egg powder). The conditions are shown below.
Cleaning liquid: Water (warm water 40 ° C)
Air flow rate: 1.6 m 3 / min (1.92 kg / min)
Flow rate of cleaning liquid: 20 liters / minute (20 kg / minute)
Cleaning time: 2.5 minutes In addition, a cleaning liquid is not specifically limited when it is water, A chemical | medical solution may be used.

図４は、本発明に係る空気輸送装置の他の実施形態の例を示す全体構成図である。   FIG. 4 is an overall configuration diagram showing an example of another embodiment of the pneumatic transport device according to the present invention.

図４において、図１に示した空気輸送装置１０の構成要素と同じ構成要素には同じ符号を付してあり、既に説明した内容については、その説明を省略する。   In FIG. 4, the same components as those of the pneumatic transport device 10 shown in FIG. 1 are denoted by the same reference numerals, and the description of the contents already described is omitted.

図４に示す本例の空気輸送装置１００は、図１に示した洗浄液供給部１６、洗浄液供給配管４０、洗浄液用流量計４４、洗浄液用電動弁４６および洗浄液供給源４８が省略されている。   The pneumatic transport apparatus 100 of this example shown in FIG. 4 omits the cleaning liquid supply unit 16, the cleaning liquid supply pipe 40, the cleaning liquid flow meter 44, the cleaning liquid electric valve 46, and the cleaning liquid supply source 48 shown in FIG.

本実施形態では、粉粒体８の輸送時には、ホッパ２３内に粉粒体８を入れ、ブロア２２から供給される空気をキャリアとして、輸送配管１２を介して粉粒体８をサイクロン２６へ輸送する一方で、輸送配管１２の洗浄時には、ホッパ２３内に粉粒体８の代りに洗浄液を入れ、ブロア２２からの空気とホッパ２３からの洗浄液とを同時に輸送配管１２内に供給して、輸送配管１２内を洗浄する。   In the present embodiment, when the granular material 8 is transported, the granular material 8 is placed in the hopper 23, and the granular material 8 is transported to the cyclone 26 via the transport pipe 12 using the air supplied from the blower 22 as a carrier. On the other hand, at the time of cleaning the transport pipe 12, a cleaning liquid is put in the hopper 23 instead of the granular material 8, and the air from the blower 22 and the cleaning liquid from the hopper 23 are supplied into the transport pipe 12 at the same time for transport. The inside of the pipe 12 is washed.

このように本実施形態では、輸送配管１２の洗浄時には、ホッパ２３を洗浄液供給源として用い、ロータリフィーダ２４を洗浄液供給部として用いて、ホッパ２３から輸送配管１２内に洗浄液を供給する。また、ロータリフィーダ２４は、輸送配管１２に洗浄水を供給するか否かを切り換える洗浄水供給切換手段として機能する。   As described above, in this embodiment, when the transport pipe 12 is cleaned, the cleaning liquid is supplied from the hopper 23 into the transport pipe 12 using the hopper 23 as a cleaning liquid supply source and the rotary feeder 24 as a cleaning liquid supply unit. Further, the rotary feeder 24 functions as a cleaning water supply switching unit that switches whether to supply cleaning water to the transport pipe 12.

ホッパ２３からロータリフィーダ２４により輸送配管１２に供給される洗浄液量が略一定である場合を例に説明すると、制御部５０は、空気用流量計３４によって検知される空気の流量に基づいて空気用電動弁３６を制御して、輸送配管１２へ供給される空気量を調整することにより、図３（ｃ）に示した洗浄液の状態となるように、輸送配管１２内の空気の流量と輸送配管１２内の洗浄液の流量との比を調整する。   The case where the amount of cleaning liquid supplied from the hopper 23 to the transport pipe 12 by the rotary feeder 24 is substantially constant will be described as an example. The control unit 50 uses the air flow rate based on the air flow rate detected by the air flow meter 34. By controlling the motor-operated valve 36 and adjusting the amount of air supplied to the transport pipe 12, the flow rate of air in the transport pipe 12 and the transport pipe so that the cleaning liquid state shown in FIG. The ratio with the flow rate of the cleaning liquid in 12 is adjusted.

本実施形態ではホッパ２３から洗浄液を供給するので、粉粒体８が洗浄液に対して可溶性である場合には、輸送配管１２内だけでなく、ロータリフィーダ２４を同時に洗浄することができる。さらにホッパ２３内の洗浄を併せて行うようにしてもよい。   In this embodiment, since the cleaning liquid is supplied from the hopper 23, when the granular material 8 is soluble in the cleaning liquid, not only the inside of the transport pipe 12 but also the rotary feeder 24 can be cleaned at the same time. Further, the inside of the hopper 23 may be cleaned together.

ただし、粉粒体８が洗浄液に対して不溶性である場合には、ロータリフィーダ２４に残留が生じ易い。例えば、粉粒体８が小麦粉の場合には、いわゆるダマ状の残留物が生じやすい。このような場合には、ホッパ２３およびロータリフィーダ２４を別途洗浄した後に輸送配管１２内の洗浄を行う。   However, when the granular material 8 is insoluble in the cleaning liquid, the rotary feeder 24 tends to remain. For example, when the granular material 8 is wheat flour, a so-called lumpy residue is likely to occur. In such a case, the inside of the transport pipe 12 is cleaned after the hopper 23 and the rotary feeder 24 are separately cleaned.

以上、本実施形態において、ホッパ２３からロータリフィーダ２４により供給される洗浄液量の検知および洗浄液量の調整を行わない簡略な構成を例に説明したが、このような構成に本発明は特に限定されず、ホッパ２３から供給される洗浄液量の検知および洗浄液量の調整を行う構成としてもよいことは、言うまでもない。   As described above, in the present embodiment, the simple configuration in which the detection of the cleaning liquid amount supplied from the hopper 23 by the rotary feeder 24 and the adjustment of the cleaning liquid amount are not described has been described as an example, but the present invention is particularly limited to such a configuration. Needless to say, it may be configured to detect the amount of cleaning liquid supplied from the hopper 23 and adjust the amount of cleaning liquid.

また、図１および図４では、圧送エアーを用いる空気輸送装置を例に示したが、吸引エアーを用いる空気輸送装置でも、本発明を適用できることは、言うまでもない。吸引エアーを用いる場合、サイクロン２６側で吸引を行う。   1 and 4 show an example of an air transportation device using compressed air, but it goes without saying that the present invention can also be applied to an air transportation device using suction air. When suction air is used, suction is performed on the cyclone 26 side.

また、図１および図４を用いて、電動弁を用いてバルブ動作を行う場合を例に説明したが、本発明に係る空気輸送装置の配管内洗浄方法は、手動バルブを用いてバルブ動作を行う場合にも適用できる。これにより装置構成をコンパクトにすることができる。   Moreover, although the case where valve operation is performed using an electric valve has been described as an example with reference to FIGS. 1 and 4, the method for cleaning a pipe of an air transportation device according to the present invention uses a manual valve to perform valve operation. It can also be applied in the case of performing. Thereby, the apparatus configuration can be made compact.

本発明は、本明細書において説明した例や図面に図示された例には限定されず、本発明の要旨を逸脱しない範囲において、各種の設計変更や改良を行ってよいことはもちろんである。   The present invention is not limited to the examples described in the present specification and the examples illustrated in the drawings, and various design changes and improvements may be made without departing from the scope of the present invention.

本発明に係る空気輸送装置の一実施形態の例を示す全体構成図The whole block diagram which shows the example of one Embodiment of the pneumatic transport apparatus which concerns on this invention 洗浄液供給部の一例を示す構成図Configuration diagram showing an example of cleaning liquid supply unit 輸送配管内の洗浄状況の例を示す図A diagram showing an example of the cleaning situation in the transportation piping 本発明に係る空気輸送装置の他の実施形態の例を示す全体構成図The whole block diagram which shows the example of other embodiment of the pneumatic transport apparatus which concerns on this invention 従来の空気輸送装置の例を示す全体構成図Overall configuration diagram showing an example of a conventional pneumatic transport device 粉粒体の付着状況を示す図The figure which shows the adhesion situation of the granular material

符号の説明Explanation of symbols

１２…輸送配管、１４…ホッパ連通口、１６…洗浄液供給部、２２…ブロア、２３…ホッパ、２４…ロータリフィーダ、２６…サイクロン、２７…タンク、２８…集塵装置、３０…空気供給配管、３４…空気用流量計、３６…空気用電動弁、４０…洗浄液供給配管、４４…洗浄液用流量計、４６…洗浄液用電動弁、４８…洗浄液供給源、５０…制御部、５２…記憶部   DESCRIPTION OF SYMBOLS 12 ... Transport piping, 14 ... Hopper communication port, 16 ... Cleaning liquid supply part, 22 ... Blower, 23 ... Hopper, 24 ... Rotary feeder, 26 ... Cyclone, 27 ... Tank, 28 ... Dust collector, 30 ... Air supply piping, 34 ... Air flow meter, 36 ... Electronic valve for air, 40 ... Cleaning liquid supply piping, 44 ... Flow meter for cleaning liquid, 46 ... Electronic valve for cleaning liquid, 48 ... Cleaning liquid supply source, 50 ... Control unit, 52 ... Storage unit

Claims (6)

圧送エアーまたは吸引エアーにより粉粒体を輸送する空気輸送装置の輸送配管内を洗浄する空気輸送装置の配管内洗浄方法であって、
前記輸送配管内に空気と洗浄液とを同時に供給して前記空気と前記洗浄液とにより前記輸送配管内を洗浄することを特徴とする空気輸送装置の配管内洗浄方法。 A method for cleaning the inside of a piping of an air transportation device for cleaning the inside of a transportation piping of an air transportation device that transports the granular material by compressed air or suction air,
A method for cleaning the inside of a pipe of an air transportation apparatus, wherein air and a cleaning liquid are simultaneously supplied into the transportation pipe and the inside of the transportation pipe is cleaned with the air and the cleaning liquid. 前記輸送配管に供給する洗浄液量は空気量に対して質量比で６乃至１８倍であることを特徴とする請求項１に記載の空気輸送装置の配管内洗浄方法。   The method for cleaning a pipe of an air transportation apparatus according to claim 1, wherein the amount of cleaning liquid supplied to the transportation pipe is 6 to 18 times the mass of air with respect to the amount of air. 前記空気の流量および前記洗浄液の流量のうちで少なくとも一方を検知し、前記空気の流量に適合した洗浄液量に調整することを特徴とする請求項２に記載の空気輸送装置の配管内洗浄方法。   The method for cleaning an in-pipe of an air transportation device according to claim 2, wherein at least one of the flow rate of the air and the flow rate of the cleaning liquid is detected and adjusted to a cleaning liquid amount suitable for the flow rate of the air. 前記輸送配管内に粉粒体を供給するためのホッパよりも空気供給側の位置から、前記輸送配管内に洗浄液を供給することを特徴とする請求項１ないし３のいずれか１項に記載の空気輸送装置の配管内洗浄方法。   The cleaning liquid is supplied into the transport pipe from a position closer to the air supply side than a hopper for supplying the granular material into the transport pipe. A method for cleaning the inside of piping of pneumatic transportation equipment. 前記輸送配管内に粉粒体を供給するためのホッパから、前記輸送配管内に洗浄液を供給することを特徴とする請求項１ないし４のいずれか１項に記載の空気輸送装置の配管内洗浄方法。   The pipe cleaning of the pneumatic transport apparatus according to any one of claims 1 to 4, wherein a cleaning liquid is supplied into the transport pipe from a hopper for supplying the granular material into the transport pipe. Method. 圧送エアーまたは吸引エアーにより粉粒体を輸送するための輸送配管と、
前記輸送配管内に空気を供給するか否かを切り換える第１の切換手段と、
前記輸送配管内に洗浄液量を供給するか否かを切り換える第２の切換手段と、
前記第１の切換手段および第２の切換手段を制御して、前記輸送配管内に空気と洗浄液とを同時に供給する制御手段と、
を備え、
前記空気と前記洗浄液とにより前記輸送配管内が洗浄されるようにしたことを特徴とする空気輸送装置。 A transport pipe for transporting the granular material by compressed air or suction air;
First switching means for switching whether to supply air into the transport pipe;
Second switching means for switching whether or not to supply the cleaning liquid amount into the transport pipe;
Control means for controlling the first switching means and the second switching means to simultaneously supply air and cleaning liquid into the transport pipe;
With
An air transport apparatus characterized in that the inside of the transport pipe is cleaned with the air and the cleaning liquid.
JP2007121865A 2007-05-02 2007-05-02 Method of cleaning inside of piping of pneumatic conveyor and pneumatic conveyor Pending JP2008272703A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102179387A (en) * 2011-02-01 2011-09-14 何贵亮 Full-automatic pot cleaning machine controlled by computer
JP2014114085A (en) * 2012-12-06 2014-06-26 Toray Eng Co Ltd Substrate flotation device and method of cleaning substrate flotation device
CN107640594A (en) * 2017-09-29 2018-01-30 襄阳市精信催化剂有限责任公司 A kind of zero broken negative-pressure air power conveying device and control method
JP2019048298A (en) * 2018-11-30 2019-03-28 株式会社Ｓｃｒｅｅｎホールディングス Substrate processing apparatus and pipe washing method in substrate processing apparatus
US10315857B2 (en) 2016-04-19 2019-06-11 Ecolab Usa Inc. Cleaning device for pneumatic conveyance system

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JPH0753269B2 (en) * 1992-07-06 1995-06-07 日揮株式会社 How to clean the pipeline
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JP2004244206A (en) * 2003-02-17 2004-09-02 Ishikawajima Harima Heavy Ind Co Ltd Flushing method and device for pneumatic conveying piping
JP2006297291A (en) * 2005-04-21 2006-11-02 Hitachi Plant Technologies Ltd Method for cleaning transport pipe of air transport apparatus

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JPH0753269B2 (en) * 1992-07-06 1995-06-07 日揮株式会社 How to clean the pipeline
JPH06271835A (en) * 1993-03-18 1994-09-27 Murata Mfg Co Ltd Method for preventing adhesion of powder
JP2003320238A (en) * 2002-04-23 2003-11-11 Applied Materials Inc Cleaning liquid supplying method, cleaning liquid supplying device, cleaning device and chemical mechanical polishing device
JP2004244206A (en) * 2003-02-17 2004-09-02 Ishikawajima Harima Heavy Ind Co Ltd Flushing method and device for pneumatic conveying piping
JP2006297291A (en) * 2005-04-21 2006-11-02 Hitachi Plant Technologies Ltd Method for cleaning transport pipe of air transport apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102179387A (en) * 2011-02-01 2011-09-14 何贵亮 Full-automatic pot cleaning machine controlled by computer
JP2014114085A (en) * 2012-12-06 2014-06-26 Toray Eng Co Ltd Substrate flotation device and method of cleaning substrate flotation device
US10315857B2 (en) 2016-04-19 2019-06-11 Ecolab Usa Inc. Cleaning device for pneumatic conveyance system
US10549922B2 (en) 2016-04-19 2020-02-04 Ecolab Usa Inc. Cleaning device for pneumatic conveyance system
CN107640594A (en) * 2017-09-29 2018-01-30 襄阳市精信催化剂有限责任公司 A kind of zero broken negative-pressure air power conveying device and control method
CN107640594B (en) * 2017-09-29 2023-05-12 襄阳市精信催化剂有限责任公司 Control method of zero-crushing negative-pressure wind power conveying device
JP2019048298A (en) * 2018-11-30 2019-03-28 株式会社Ｓｃｒｅｅｎホールディングス Substrate processing apparatus and pipe washing method in substrate processing apparatus

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