JP2004067207A - Silo for powders and granules - Google Patents

Silo for powders and granules Download PDF

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Publication number
JP2004067207A
JP2004067207A JP2002231525A JP2002231525A JP2004067207A JP 2004067207 A JP2004067207 A JP 2004067207A JP 2002231525 A JP2002231525 A JP 2002231525A JP 2002231525 A JP2002231525 A JP 2002231525A JP 2004067207 A JP2004067207 A JP 2004067207A
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Japan
Prior art keywords
silo
powders
granules
slaked lime
activated carbon
Prior art date
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Pending
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JP2002231525A
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Japanese (ja)
Inventor
Takamasa Kojo
古城 貴雅
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Hitachi Plant Technologies Ltd
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Hitachi Plant Technologies Ltd
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Application filed by Hitachi Plant Technologies Ltd filed Critical Hitachi Plant Technologies Ltd
Priority to JP2002231525A priority Critical patent/JP2004067207A/en
Publication of JP2004067207A publication Critical patent/JP2004067207A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a less-expensive silo for powders and granules requiring a narrow occupying space operated even in the event that several different kinds of powders or granules are received. <P>SOLUTION: There is provided a silo for receiving powers and granules supplied from a tank truck 54 through a pneumatic transporting system and storing them, This silo comprises a plurality of storing units 36, 38 partitioned by a partition plate 34 each of which can store the powders and granules; a common closed space 40 arranged above these storing units, and an deaerating means 42 arranged at the closed space. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は粉粒体用サイロに係り、特に空気式の圧力輸送で供給される粉粒体を受け入れて貯留する粉粒体用サイロに関する。
【0002】
【従来の技術】
従来、ごみ焼却炉から排出される燃焼排ガスにはダストの外に、塩化水素やダイオキシンなどの有害ガスが含まれている場合がある。これらの有害ガスを燃焼排ガスから除去する方法としては、有害ガスと反応する薬剤を燃焼排ガス中に噴霧し、生成した固体状の反応生成物を後段のバグフィルタによってダストとともに捕集する方法が採用されている。
【0003】
例えば、図2に示す排ガス処理設備では、ごみ焼却炉1から排出される燃焼排ガスが誘引ファン2を駆動することによって、バグフィルタ3に吸引される。バグフィルタ3の一次側の排ガスライン4には、薬剤注入ライン5が接続しており、この薬剤注入ライン5から消石灰と活性炭の微粉末が噴霧される。すなわち、薬剤注入ライン5の上流側には粉末消石灰を貯留した消石灰サイロ6と、粉末活性炭を貯留した活性炭サイロ7とが配設されている。薬剤注入ライン5の上流端に設けたブロワ8を駆動することによって、消石灰サイロ6内の消石灰と、活性炭サイロ7内の活性炭がブロワ8で供給された空気流に同伴し、混合状態で排ガスライン4を通る燃焼排ガスに噴霧される。噴霧された消石灰は燃焼排ガス中の塩化水素と中和反応して、塩化カルシウムを生成する。また、噴霧された活性炭は燃焼排ガス中のダイオキシンなどを吸着する。これらの反応生成物は燃焼排ガス中のダストや過剰に添加された未反応の消石灰、活性炭とともに、バグフィルタ3によって捕集される。その結果、ダストや有害ガスが除去された処理ガスがバグフィルタ3の二次側から排出される。
【0004】
【発明が解決しようとする課題】
ところで、消石灰サイロ6や活性炭サイロ7に貯留される粉末消石灰や粉末活性炭は、専用のタンクローリ9,10から空気式の圧力輸送によって、各サイロ6、7に供給され、貯留される。各サイロ6,7には、この空気式の圧力輸送時にサイロ内の昇圧を防ぐために、それぞれ空気抜き手段11,12が設けられている。粉末消石灰や粉末活性炭を圧力輸送するためにサイロに送られた空気は空気抜き手段11,12によって濾過された後にサイロ外に放出される。すなわち、従来のこの種の粉粒体用サイロでは、種類の異なる複数の粉粒体に対して、それぞれ専用のサイロを必要とし、専用の空気抜き手段を必要としていた。このため、専用のサイロや空気抜き手段を設置するための設備費が高価となり、設置スペースも大きくなる問題点があった。
【0005】
本発明の目的は上記従来技術の問題点を改善し、空気式の圧力輸送で供給される種類の異なる複数の粉粒体を受け入れる場合でも、低価格で設置スペースを小さくすることができる粉粒体用サイロを提供することにある。
【0006】
【課題を解決するための手段】
本発明に係る粉粒体用サイロは、空気式の圧力輸送で供給される粉粒体を受け入れて貯留する粉粒体用サイロであって、仕切板で仕切られて前記粉粒体をそれぞれ収容可能な複数の収容部と、これらの収容部の上方に配された共通の密閉空間部と、前記密閉空間部に設けた空気抜き手段とを具備したことを特徴とする。
【0007】
本発明によれば、粉粒体を収容するための複数の収容部が仕切板を隔てて互いに隣接し、これらの収容部の上方に配された共通の密閉空間部によって連通している。このため、複数の専用のサイロを独立して設置した場合に比べて、低価格で設置スペースの小さな粉粒体用サイロとすることができる。また、いずれの粉粒体を空気式の圧力輸送で受け入れる際にも、密閉空間部に設けた共用の空気抜き手段から空気を放出することができるので、空気抜き手段の設置数を一つで済ますことができる。
【0008】
【発明の実施の形態】
図1は本発明に係る粉粒体用サイロを備えた排ガス処理設備の全体構成を示す系統図である。排ガス処理設備20は、ごみ焼却炉22から排出される燃焼排ガスが誘引ファン24を駆動することによって、バグフィルタ26に吸引される。バグフィルタ26の一次側の排ガスライン28には、薬剤注入ライン30が接続している。薬剤注入ライン30の上流側には粉末消石灰と粉末活性炭を貯留したサイロ32が配設されている。サイロ32内は仕切板34によって仕切られた二つの収容部36,38が隣接している。容積の大きい収容部36は使用量が多い粉末消石灰の収容部であり、容積の小さい収容部38は使用量が少ない粉末活性炭の収容部である。
【0009】
これらの収容部36,38の上方は共通の密閉空間部40とされる。密閉空間部40の上部には仕切板34の直上位置に空気抜き手段42が設けられている。また、収容部36,38の下部はそれぞれホッパー状とされ、その下端には収容物を定量的に切り出す排出弁44,46が取り付けられている。排出弁44,46と薬剤注入ライン30とはそれぞれ管路48,50によって連通している。薬剤注入ライン30の上流端にはブロワ52が配置されている。
【0010】
ブロワ52を駆動すると、排出弁44,46から切り出された収容部36内の粉末消石灰と、収容部38内の粉末活性炭がそれぞれ管路48,50を介して薬剤注入ライン30に落下する。薬剤注入ライン30では粉末消石灰と粉末活性炭がブロワ52で供給された空気流に同伴し、混合状態で排ガスライン28に送り込まれ、排ガスライン28を通る燃焼排ガスに噴霧される。噴霧された粉末消石灰は燃焼排ガス中の塩化水素と中和反応して、塩化カルシウムを生成する。また、噴霧された粉末活性炭は燃焼排ガス中のダイオキシンなどを吸着する。これらの反応生成物は燃焼排ガス中のダストや過剰に添加された未反応の粉末消石灰、粉末活性炭とともに、バグフィルタ26によって捕集される。その結果、ダストや有害ガスが除去された処理ガスがバグフィルタ26の二次側から排出される。
【0011】
上記の運転によって、各収容部内の粉末消石灰、又は粉末活性炭の貯留量が一定レベル以下になると、専用のタンクローリ54から空気式の圧力輸送によって、粉末消石灰を収容部36に、粉末活性炭を収容部38に供給し貯留する。すなわち、収容部36,38の側板には粉粒体の受入口56,58が設けられ、この受入口56,58には切替弁60,62を備えた受入ライン64,66が接続している。受入ライン64,66の基端側は開閉弁68を備えたホースコネクタ70となっている。粉末消石灰を受け入れる場合には、粉末消石灰用のタンクローリ54のホースをホースコネクタ70に接続するとともに、開閉弁68と切替弁60を開、切替弁62を閉とし、タンクローリ54内の粉末消石灰を空気式の圧力輸送によって収容部36に供給する。また、粉末活性炭を受け入れる場合には、切替弁62を開、切替弁60を閉に切り替えて、同様に粉末活性炭を収容部38に供給する。
【0012】
これらの粉末消石灰や粉末活性炭を圧力輸送する際にサイロ32の密閉空間部40に送られた空気は空気抜き手段42によって濾過された後にサイロ32外に放出される。空気抜き手段42が収容部36と収容部38とを仕切る仕切板34の直上位置に配置されているので、粉末消石灰を収容部36に供給する場合には、粉末消石灰を同伴した空気が隣の収容部38上方の空間部を通過することはない。このため、粉末消石灰はもっぱら収容部36の方に落下して受け入れられ、隣の収容部38にはほとんど混入しない。逆に粉末活性炭を収容部38に供給する場合には、粉末活性炭はもっぱら収容部38の方に落下して受け入れられ、隣の収容部36にはほとんど混入しない。また、粉末消石灰や粉末活性炭が互いに多少、混入し合っても、前記したようにこれらの粉粒体は混合状態で排ガスライン28に送り込まれるのであるから格別の障害は生じない。
【0013】
上述のとおり、本実施の形態に係るサイロ32は、粉粒体を収容するための収容部36,38が仕切板34を隔てて互いに隣接し、これらの収容部36,38の上方に配された共通の密閉空間部40によって連通している。このため、複数の専用のサイロを独立して設置した場合に比べて、低価格で設置スペースの小さなサイロとすることができる。また、いずれの粉粒体を空気式の圧力輸送で受け入れる際にも、密閉空間部に設けた共用の空気抜き手段42から空気を放出することができるので、空気抜き手段の設置数を一つで済ますことができる。
【0014】
なお、上記実施形態のサイロ32は2個の収容部36,38を備えていたが、本発明はこれに限らず、3個以上の収容部を備えるようにしてもよい。また、上記実施形態のサイロ32は種類の異なる粉粒体を、それぞれ個別に収容可能な収容部36,38を備えていたが、本発明はこれに限らず、同一の粉粒体をそれぞれ個別に収容可能な複数の収容部を備えたものであってもよい。この場合には粉粒体相互のコンタミの懸念がないので、上記の排ガス処理設備用のサイロのみならず、その適用範囲をより一層、拡大することができる。
【0015】
【発明の効果】
本発明の粉粒体用サイロは、空気式の圧力輸送で供給される種類の異なる複数の粉粒体を受け入れる場合でも、複数の専用のサイロを個別に設置した場合に比べて、低価格で設置スペースの小さな粉粒体用サイロとすることができる。また、いずれの粉粒体を空気式の圧力輸送で受け入れる際にも、密閉空間部に設けた共用の空気抜き手段から空気を放出することができるので、空気抜き手段の設置数を一つで済ますことができる。このため、多少のコンタミが許容される種類の異なる複数の粉粒体を個別に受け入れるサイロとして特に有効である。
【図面の簡単な説明】
【図1】本発明に係る粉粒体用サイロを備えた排ガス処理設備の構成を示す系統図
【図2】従来の粉粒体用サイロを備えた排ガス処理設備の構成を示す系統図
【符号の説明】
20……排ガス処理設備、30……薬剤注入ライン、 32……サイロ、
34……仕切板、36,38……収容部、40……密閉空間部、
42……空気抜き手段、54……タンクローリ、56,58……受入口、
60,62……切替弁、64,66……受入ライン、
70……ホースコネクタ
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a granular material silo, and more particularly to a granular material silo that receives and stores a granular material supplied by pneumatic pressure transportation.
[0002]
[Prior art]
Conventionally, flue gas discharged from a refuse incinerator sometimes contains harmful gases such as hydrogen chloride and dioxin in addition to dust. As a method of removing these harmful gases from the flue gas, a method is used in which a chemical that reacts with the harmful gas is sprayed into the flue gas, and the resulting solid reaction product is collected together with dust by a bag filter at the subsequent stage. Have been.
[0003]
For example, in the exhaust gas treatment equipment shown in FIG. 2, the combustion exhaust gas discharged from the refuse incinerator 1 is drawn into the bag filter 3 by driving the induction fan 2. A chemical injection line 5 is connected to an exhaust gas line 4 on the primary side of the bag filter 3, and fine powder of slaked lime and activated carbon is sprayed from the chemical injection line 5. That is, a slaked lime silo 6 storing powdered slaked lime and an activated carbon silo 7 storing powdered activated carbon are arranged on the upstream side of the chemical injection line 5. By driving the blower 8 provided at the upstream end of the chemical injection line 5, slaked lime in the slaked lime silo 6 and activated carbon in the activated carbon silo 7 accompany the air flow supplied by the blower 8, and the exhaust gas line is mixed. 4 is sprayed on the flue gas. The sprayed slaked lime undergoes a neutralization reaction with hydrogen chloride in the combustion exhaust gas to generate calcium chloride. The sprayed activated carbon adsorbs dioxin and the like in the combustion exhaust gas. These reaction products are collected by the bag filter 3 together with dust in the flue gas, unreacted slaked lime and activated carbon added in excess. As a result, the processing gas from which dust and harmful gas have been removed is discharged from the secondary side of the bag filter 3.
[0004]
[Problems to be solved by the invention]
By the way, the powdered slaked lime and the powdered activated carbon stored in the slaked lime silo 6 and the activated carbon silo 7 are supplied to the silos 6 and 7 by pneumatic pressure transportation from dedicated tank trucks 9 and 10, and stored. The silos 6 and 7 are provided with air vents 11 and 12, respectively, in order to prevent the silo from being pressurized during the pneumatic pressure transportation. Air sent to the silo for pressure transport of powdered slaked lime or powdered activated carbon is discharged out of the silo after being filtered by the air release means 11 and 12. That is, in this type of conventional silos for powders and granules, a special silo is required for each of a plurality of different types of powders and granules, and a special air vent is required. For this reason, there has been a problem that equipment costs for installing a dedicated silo or an air bleeding unit are expensive and the installation space is large.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned problems of the prior art, and to reduce the installation space at low cost even when receiving a plurality of different types of powders supplied by pneumatic pressure transportation. An object of the present invention is to provide a body silo.
[0006]
[Means for Solving the Problems]
The granular material silo according to the present invention is a granular material silo that receives and stores a granular material supplied by pneumatic pressure transport, and is separated by a partition plate and accommodates the granular material. It is characterized by comprising a plurality of possible storage portions, a common closed space portion disposed above these storage portions, and air vent means provided in the closed space portion.
[0007]
According to the present invention, a plurality of storage portions for storing the granular material are adjacent to each other with the partition plate interposed therebetween, and are communicated with each other by the common closed space disposed above these storage portions. For this reason, compared with the case where a plurality of exclusive silos are installed independently, a silo for powder and granular materials having a small installation space can be provided at a lower cost. Also, when any of the powders is received by pneumatic pressure transport, air can be released from the common air vent provided in the enclosed space, so that only one air vent is required. Can be.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a system diagram showing the overall configuration of an exhaust gas treatment facility provided with the silos for granular materials according to the present invention. In the exhaust gas treatment facility 20, the combustion exhaust gas discharged from the refuse incinerator 22 is drawn into the bag filter 26 by driving the induction fan 24. A chemical injection line 30 is connected to an exhaust gas line 28 on the primary side of the bag filter 26. A silo 32 containing powdered slaked lime and powdered activated carbon is disposed upstream of the chemical injection line 30. In the silo 32, two storage portions 36 and 38 separated by a partition plate 34 are adjacent. The storage section 36 with a large volume is a storage section for powdered slaked lime that is used a large amount, and the storage section 38 with a small volume is a storage section for powdered activated carbon that is used a little.
[0009]
The upper part of the housings 36 and 38 is a common closed space 40. Above the closed space 40, an air vent means 42 is provided just above the partition plate 34. The lower portions of the housing portions 36 and 38 are each formed in a hopper shape, and discharge valves 44 and 46 for quantitatively cutting out the contents are attached to lower ends thereof. The discharge valves 44 and 46 communicate with the medicine injection line 30 by conduits 48 and 50, respectively. A blower 52 is arranged at an upstream end of the medicine injection line 30.
[0010]
When the blower 52 is driven, the powdered slaked lime in the storage portion 36 cut out from the discharge valves 44 and 46 and the activated carbon powder in the storage portion 38 fall into the drug injection line 30 via the conduits 48 and 50, respectively. In the chemical injection line 30, the powdered slaked lime and the powdered activated carbon accompany the air flow supplied by the blower 52, are sent to the exhaust gas line 28 in a mixed state, and are sprayed to the combustion exhaust gas passing through the exhaust gas line 28. The sprayed powdered slaked lime undergoes a neutralization reaction with hydrogen chloride in the combustion exhaust gas to generate calcium chloride. Further, the sprayed powdered activated carbon adsorbs dioxin and the like in the combustion exhaust gas. These reaction products are collected by the bag filter 26 together with dust in the flue gas, unreacted powdered slaked lime and powdered activated carbon added in excess. As a result, the processing gas from which dust and harmful gas have been removed is discharged from the secondary side of the bag filter 26.
[0011]
When the storage amount of the powdered slaked lime or the powdered activated carbon in each storage unit becomes equal to or less than a certain level by the above operation, the powdered slaked lime is stored in the storage unit 36 by the pneumatic pressure transport from the dedicated tank lorry 54, and the powdered activated carbon is stored in the storage unit. 38 and stored. That is, receiving ports 56 and 58 for the granular material are provided in the side plates of the housing sections 36 and 38, and receiving lines 64 and 66 having switching valves 60 and 62 are connected to the receiving ports 56 and 58. . A hose connector 70 having an on-off valve 68 is provided at the base end of the receiving lines 64 and 66. When powder slaked lime is received, the hose of the tank sled 54 for powder slaked lime is connected to the hose connector 70, the open / close valve 68 and the switching valve 60 are opened, the switching valve 62 is closed, and the powder slaked lime in the tank sled 54 is removed by air. The pressure is supplied to the storage section 36 by a pressure transfer of a formula. When receiving the powdered activated carbon, the switching valve 62 is opened and the switching valve 60 is switched to the closed state, and the powdered activated carbon is similarly supplied to the storage section 38.
[0012]
When the powdered slaked lime and the powdered activated carbon are transported under pressure, the air sent to the closed space 40 of the silo 32 is filtered out by the air venting means 42 and then discharged out of the silo 32. Since the air release means 42 is disposed immediately above the partition plate 34 that separates the storage section 36 and the storage section 38, when powdered slaked lime is supplied to the storage section 36, the air accompanied by the powdered slaked lime is stored in the adjacent storage section. It does not pass through the space above the part 38. For this reason, the powdered slaked lime falls and is exclusively received by the storage section 36, and hardly enters the adjacent storage section 38. Conversely, when powdered activated carbon is supplied to the storage section 38, the powdered activated carbon falls and is exclusively received by the storage section 38, and hardly enters the adjacent storage section 36. Even if powdered slaked lime and powdered activated carbon are mixed with each other to some extent, since these powders are sent to the exhaust gas line 28 in a mixed state as described above, no particular obstacle occurs.
[0013]
As described above, in the silo 32 according to the present embodiment, the accommodating portions 36 and 38 for accommodating the granular material are adjacent to each other with the partition plate 34 interposed therebetween, and are disposed above the accommodating portions 36 and 38. They are communicated by a common closed space 40. For this reason, compared with the case where a plurality of dedicated silos are independently installed, a silo with a low installation cost and a small installation space can be provided. In addition, air can be released from the common air venting means 42 provided in the closed space when any of the powders is received by pneumatic pressure transportation, so that only one air venting device needs to be installed. be able to.
[0014]
In addition, although the silo 32 of the said embodiment was provided with the two accommodating parts 36 and 38, this invention is not limited to this, You may make it provide three or more accommodating parts. In addition, the silo 32 of the above-described embodiment includes the accommodating portions 36 and 38 that can individually accommodate different types of powders, but the present invention is not limited to this. It may be provided with a plurality of storage portions that can be stored in the storage device. In this case, since there is no concern about contamination between the powders and granules, not only the silo for the exhaust gas treatment facility described above but also its application range can be further expanded.
[0015]
【The invention's effect】
The silos for powder and granular materials of the present invention can be manufactured at a lower cost, even when receiving a plurality of different types of powder and granules supplied by pneumatic pressure transportation, compared to a case where a plurality of dedicated silos are individually installed. It can be a silo for a granular material having a small installation space. Also, when any of the powders is received by pneumatic pressure transport, air can be released from the common air vent provided in the enclosed space, so that only one air vent is required. Can be. For this reason, it is particularly effective as a silo for individually receiving a plurality of different types of powders to which some contamination is allowed.
[Brief description of the drawings]
FIG. 1 is a system diagram showing the configuration of an exhaust gas treatment facility provided with the silos for powders and granules according to the present invention. Description]
20: exhaust gas treatment equipment, 30: chemical injection line, 32: silo,
34 ... partition plate, 36, 38 ... accommodation part, 40 ... closed space part,
42 air venting means, 54 tank lorry, 56, 58 receiving port,
60, 62 ... switching valve, 64, 66 ... receiving line,
70 ... Hose connector

Claims (1)

空気式の圧力輸送で供給される粉粒体を受け入れて貯留する粉粒体用サイロであって、仕切板で仕切られて前記粉粒体をそれぞれ収容可能な複数の収容部と、これらの収容部の上方に配された共通の密閉空間部と、前記密閉空間部に設けた空気抜き手段とを具備したことを特徴とする粉粒体用サイロ。A silo for a granular material for receiving and storing a granular material supplied by pneumatic pressure transportation, comprising a plurality of storage units that can be partitioned by a partition plate and can store the granular material, respectively, A silo for a granular material, comprising: a common closed space disposed above the unit; and air vent means provided in the closed space.
JP2002231525A 2002-08-08 2002-08-08 Silo for powders and granules Pending JP2004067207A (en)

Priority Applications (1)

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JP2002231525A JP2004067207A (en) 2002-08-08 2002-08-08 Silo for powders and granules

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Application Number Priority Date Filing Date Title
JP2002231525A JP2004067207A (en) 2002-08-08 2002-08-08 Silo for powders and granules

Publications (1)

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JP2004067207A true JP2004067207A (en) 2004-03-04

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JP2002231525A Pending JP2004067207A (en) 2002-08-08 2002-08-08 Silo for powders and granules

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018066523A (en) * 2016-10-21 2018-04-26 日立造船株式会社 Drug dosing device and treatment equipment of flue gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018066523A (en) * 2016-10-21 2018-04-26 日立造船株式会社 Drug dosing device and treatment equipment of flue gas

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