JP2020151675A - Exhaust gas treatment method by bag filter - Google Patents

Exhaust gas treatment method by bag filter Download PDF

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JP2020151675A
JP2020151675A JP2019053677A JP2019053677A JP2020151675A JP 2020151675 A JP2020151675 A JP 2020151675A JP 2019053677 A JP2019053677 A JP 2019053677A JP 2019053677 A JP2019053677 A JP 2019053677A JP 2020151675 A JP2020151675 A JP 2020151675A
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exhaust gas
carbon powder
bag filter
gas treatment
oil
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法紀 大坂
Noriki OSAKA
法紀 大坂
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JFE Chemical Corp
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Abstract

To provide a method for passing exhaust gas generated in a carbon powder firing furnace through a bag filter and removing oil content-containing carbon powder contained in the exhaust gas from the exhaust gas which can extend a filter life, and can prevent contamination of a treated object in a furnace when dust reversely flows into the furnace.SOLUTION: The method includes: a carbon powder bonding step of bonding carbon powder obtained by firing a carbon precursor in a carbon powder firing furnace to a bag filter 12; and an exhaust gas treatment step of passing the exhaust gas through the bag filter after the carbon powder bonding step and treating the exhaust gas.SELECTED DRAWING: Figure 1

Description

この発明は、炭素粉焼成炉で発生する排ガスをバグフィルターに通して、排ガスに含まれている油分含有炭素粉末を排ガスから取り除く方法に関する。 The present invention relates to a method for removing oil-containing carbon powder contained in the exhaust gas from the exhaust gas by passing the exhaust gas generated in the carbon powder firing furnace through a bag filter.

炭素粉を焼成する際に発生する炭素微粒粉を含む排ガスの集塵処理方法としては、バグフィルターを用いた濾過式集塵方法が広く用いられている。しかし、微粒粉に加えて粘着性の油分を含む排ガス等を処理する場合は、油分がバグフィルターに固着して目詰まりを生じさせるため、バグフィルターの寿命が極めて短くなる。そのため、一般的には、油分を含む排ガスをバグフィルターで処理することは不適切であるとされている。
しかし、バグフィルターを用いた濾過式集塵方法は、電気式集塵方法や湿式集塵方法と比べて設備投資費用が安価であり、かつ有害な廃液等を発生しない等、多くのメリットがある。そのため、バグフィルターが油分で目詰まりすることを防止して、フィルター寿命を延長する方法が求められている。 As a dust collecting treatment method for exhaust gas containing carbon fine particles generated when carbon powder is fired, a filtration type dust collecting method using a bag filter is widely used. However, when treating exhaust gas or the like containing sticky oil in addition to the fine powder, the oil adheres to the bag filter and causes clogging, so that the life of the bag filter is extremely shortened. Therefore, it is generally considered inappropriate to treat exhaust gas containing oil with a bag filter.
However, the filtration type dust collection method using a bag filter has many merits such as low capital investment cost and no harmful waste liquid generation as compared with the electric dust collection method and the wet dust collection method. .. Therefore, there is a demand for a method of preventing the bag filter from being clogged with oil and extending the filter life.

バグフィルターによる排ガス処理方法でフィルター寿命を延長する方法に関しては、例えば、特許文献１および特許文献２に、バグフィルターに粘着物質を含まない層を設けた後、粘着性物質を含むダストを除塵する技術が開示されている。しかし、これらの文献に記載の方法では、設ける粘着物質を含まない層が、粘着性物質を含むダストの発生源から得られたものでない。したがって、何らかのトラブルでダストが炉に逆流した場合、炉内の処理物が汚染されてしまう。
また、特許文献３および特許文献４には、タールや油などの粘着物を含むダストを、潤滑剤やろ過助剤などがプレコートされたバグフィルターで除塵する技術が開示されている。しかし、これらの技術では、プレコートに潤滑剤やろ過助剤など異物質が添加されているため、何らかのトラブルでダストが炉に逆流した場合、炉内の処理物が汚染されてしまう。 Regarding the method of extending the filter life by the exhaust gas treatment method using a bag filter, for example, in Patent Document 1 and Patent Document 2, after providing a layer containing no adhesive substance in the bag filter, dust containing an adhesive substance is removed. The technology is disclosed. However, in the methods described in these documents, the sticky substance-free layer provided is not obtained from a source of dust containing the sticky substance. Therefore, if dust flows back into the furnace due to some trouble, the processed material in the furnace will be contaminated.
Further, Patent Documents 3 and 4 disclose a technique for removing dust containing a sticky substance such as tar or oil with a bag filter precoated with a lubricant, a filtration aid or the like. However, in these technologies, since foreign substances such as lubricants and filtration aids are added to the precoat, if dust flows back into the furnace due to some trouble, the processed material in the furnace will be contaminated.

特許文献５および特許文献６にも、タールや油などの粘着物を含むダストを、非粘着性粉やカーボン粉末をプレコートしたバグフィルターで除塵する技術が開示されている。しかし、これらの技術では、プレコートされる非粘着性粉やカーボン粉末が、必ずしも粘着性物質を含むダストの発生源と同一の物質ではないため、炉内の処理物が汚染されてしまう可能性がある。
特許文献７、特許文献８、特許文献９、および特許文献１０には、バグフィルターで捕集したダストをそのバグフィルターに付着させた後に、そのバグフィルターで除塵する技術が開示されている。しかし、これらの技術は、油などの粘着物を含有するダストの除塵を想定したものではない。 Patent Document 5 and Patent Document 6 also disclose a technique for removing dust containing an adhesive substance such as tar or oil with a bag filter precoated with non-adhesive powder or carbon powder. However, with these technologies, the precoated non-adhesive powder or carbon powder is not necessarily the same substance as the source of dust containing adhesive substances, which may contaminate the processed material in the furnace. is there.
Patent Document 7, Patent Document 8, Patent Document 9, and Patent Document 10 disclose a technique for adhering dust collected by a bag filter to the bag filter and then removing the dust with the bag filter. However, these techniques do not assume the removal of dust containing sticky substances such as oil.

特開昭５８−１６３４１６号公報Japanese Unexamined Patent Publication No. 58-163416 特開２０１６−９７３５２号公報Japanese Unexamined Patent Publication No. 2016-97352 特開昭５１−１１７３７３号公報JP-A-51-117373 特開２０１７−４２７４５号公報Japanese Unexamined Patent Publication No. 2017-42745 特開昭５３−３４１７８号公報Japanese Patent Application Laid-Open No. 53-34178 特開昭５９−２２５７２０号公報JP-A-59-225720 特開昭５５−７５７２０号公報JP-A-55-75720 特開２００２−５８９３７号公報Japanese Unexamined Patent Publication No. 2002-58937 特開２００６−３２６５１４号公報Japanese Unexamined Patent Publication No. 2006-326514 特開昭５２−１３１２７１号公報Japanese Unexamined Patent Publication No. 52-131271

この発明の課題は、炭素粉焼成炉で発生する排ガスをバグフィルターに通して、排ガスに含まれている油分含有炭素粉末を排ガスから取り除く排ガス処理方法として、フィルター寿命を延長できるとともに、ダストが炉に逆流した場合に炉内の処理物の汚染が防止できる方法を提供することである。 The subject of the present invention is that the filter life can be extended and dust can be removed from the exhaust gas as an exhaust gas treatment method for removing the oil-containing carbon powder contained in the exhaust gas from the exhaust gas by passing the exhaust gas generated in the carbon powder firing furnace through a bag filter. It is to provide a method that can prevent the contamination of the processed material in the furnace in the case of backflow.

この発明の一態様は、炭素粉焼成炉で炭素前駆体を焼成して炭素粉を得るとともに、該炭素粉焼成炉で発生する排ガスをバグフィルターに通して、排ガスに含まれている油分含有炭素粉末を排ガスから取り除く排ガス処理方法であって、下記の構成要件(a)(b)を有することを特徴とする。
(a)炭素粉焼成炉で炭素前駆体を焼成して得られた炭素粉をバグフィルターに付着させる炭素粉付着工程を有する。
(b)炭素粉付着工程後のバグフィルターに、炭素粉焼成炉で発生する排ガスを通して排ガスを処理する排ガス処理工程を有する。 One aspect of the present invention is to calcin a carbon precursor in a carbon powder calcining furnace to obtain carbon powder, and pass the exhaust gas generated in the carbon powder calcining furnace through a bag filter to pass oil-containing carbon contained in the exhaust gas. It is an exhaust gas treatment method for removing powder from exhaust gas, and is characterized by having the following constituent requirements (a) and (b).
(a) It has a carbon powder adhering step of adhering carbon powder obtained by firing a carbon precursor in a carbon powder firing furnace to a bag filter.
(b) The bag filter after the carbon powder adhesion process has an exhaust gas treatment process for treating the exhaust gas through the exhaust gas generated in the carbon powder firing furnace.

この発明の一態様によれば、炭素粉焼成炉で発生する排ガスをバグフィルターに通して、排ガスに含まれている油分含有炭素粉末を排ガスから取り除く排ガス処理方法として、フィルター寿命を延長できるとともに、ダストが炉に逆流した場合に炉内の処理物の汚染が防止できる方法が提供される。付着させる炭素粉は排ガス中の油分との親和性が高いので、油分を吸着し易い。 According to one aspect of the present invention, the filter life can be extended as an exhaust gas treatment method for removing the oil-containing carbon powder contained in the exhaust gas from the exhaust gas by passing the exhaust gas generated in the carbon powder firing furnace through a bag filter. A method is provided that can prevent contamination of the processed material in the furnace when dust flows back into the furnace. Since the carbon powder to be attached has a high affinity with the oil content in the exhaust gas, it easily adsorbs the oil content.

実施形態の排ガス処理方法を説明する図である。It is a figure explaining the exhaust gas treatment method of embodiment. 実施例で使用した炭素粉焼成設備を示す図である。It is a figure which shows the carbon powder firing equipment used in an Example.

以下、この発明の実施形態について説明するが、この発明は以下に示す実施形態に限定されない。また、以下に示す実施形態では、この発明を実施するために技術的に好ましい限定がなされているが、この限定はこの発明の必須要件ではない。
この実施形態の排ガス処理方法は、炭素粉焼成炉で発生する排ガスをバグフィルターに通して、排ガスに含まれている油分含有炭素粉末を取り除く方法である。
この実施形態の排ガス処理方法では、排ガス処理工程の最中にバグフィルターの圧力損失が所定値となった時点で、排ガス処理工程を停止し、バグフィルターに付着した油分含有炭素粉末を除去する除去工程を行う。 Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the embodiments shown below. Further, in the embodiments shown below, technically preferable limitations are made for carrying out the present invention, but this limitation is not an essential requirement of the present invention.
The exhaust gas treatment method of this embodiment is a method of removing the oil-containing carbon powder contained in the exhaust gas by passing the exhaust gas generated in the carbon powder firing furnace through a bag filter.
In the exhaust gas treatment method of this embodiment, when the pressure loss of the bag filter reaches a predetermined value during the exhaust gas treatment process, the exhaust gas treatment process is stopped and the oil-containing carbon powder adhering to the bag filter is removed. Perform the process.

この実施形態の排ガス処理方法で使用する排ガス集塵処理設備は、図１に示すように、バグフィルター１２を備えた集塵機１と、集塵機１への排ガス導入管２と、集塵機１からの気体導出管３と、吸引ブロワー４と、吸引ブロワー４の排気口に接続された気体排出管５を備えている。排ガス導入管２は、炭素粉焼成炉の排ガス排出口と集塵機１の排ガス導入口を接続している。気体導出管３は集塵機１のバグフィルター１２と吸引ブロワー４の気体導入口を接続している。集塵機１の下部には炭素粉を収納する容器８１を設けている。 As shown in FIG. 1, the exhaust gas dust collector treatment equipment used in the exhaust gas treatment method of this embodiment includes a dust collector 1 provided with a bug filter 12, an exhaust gas introduction pipe 2 to the dust collector 1, and gas derivation from the dust collector 1. It includes a pipe 3, a suction blower 4, and a gas discharge pipe 5 connected to an exhaust port of the suction blower 4. The exhaust gas introduction pipe 2 connects the exhaust gas discharge port of the carbon powder firing furnace and the exhaust gas introduction port of the dust collector 1. The gas outlet pipe 3 connects the bag filter 12 of the dust collector 1 and the gas introduction port of the suction blower 4. A container 81 for storing carbon powder is provided below the dust collector 1.

先ず、図１（ａ）に示すように、炭素粉焼成炉で炭素前駆体を焼成して得た炭素粉末６が入った容器８１を集塵機１の開口１３の下方に設置し、排ガス導入管２の開閉弁２１を閉じ、気体導出管３の開閉弁３１を開けて、吸引ブロワー４を稼働させる。これにより、容器８１内の炭素粉末６が、開口１３から集塵機１内に入ってバグフィルター１２に付着する。この工程が炭素粉付着工程である。 First, as shown in FIG. 1A, a container 81 containing the carbon powder 6 obtained by firing the carbon precursor in a carbon powder firing furnace is installed below the opening 13 of the dust collector 1, and the exhaust gas introduction pipe 2 is installed. The on-off valve 21 of the above is closed, the on-off valve 31 of the gas outlet pipe 3 is opened, and the suction blower 4 is operated. As a result, the carbon powder 6 in the container 81 enters the dust collector 1 through the opening 13 and adheres to the bag filter 12. This step is a carbon powder adhesion step.

次に、図１（ｂ）に示すように、排ガス導入管２の開閉弁２１および気体導出管３の開閉弁３１を開き、吸引ブロワー４を稼働させ、炭素粉焼成炉からの排ガスを集塵機１に導入して、炭素粉付着工程後のバグフィルター１２に通す。この工程が排ガス処理工程である。この排ガス処理工程で、炭素粉焼成炉で発生する排ガスに含まれる油分７と炭素粉末６とが合体したり、炭素粉付着工程でバグフィルター１２に付着された炭素粉末６に油分７が吸着されたりすることで、バグフィルター１２に油分含有炭素粉末が付着する。つまり、この工程は、排ガス処理工程であると同時に油分含有炭素粉末付着工程でもある。また、この工程の間、バグフィルター１２の圧力損失値を差圧計で測定する。 Next, as shown in FIG. 1B, the on-off valve 21 of the exhaust gas introduction pipe 2 and the on-off valve 31 of the gas outlet pipe 3 are opened, the suction blower 4 is operated, and the exhaust gas from the carbon powder firing furnace is collected by the dust collector 1. It is introduced into the bag filter 12 after the carbon powder adhesion process. This process is an exhaust gas treatment process. In this exhaust gas treatment step, the oil 7 and the carbon powder 6 contained in the exhaust gas generated in the carbon powder firing furnace are united, or the oil 7 is adsorbed on the carbon powder 6 adhered to the bag filter 12 in the carbon powder adhering step. By doing so, the oil-containing carbon powder adheres to the bag filter 12. That is, this step is not only an exhaust gas treatment step but also an oil-containing carbon powder adhesion step. Further, during this step, the pressure loss value of the bag filter 12 is measured with a differential pressure gauge.

次に、バグフィルター１２の圧力損失が所定値（目詰まりが生じない値であって、実績によって決定される基準値）となった時点で、図１（ｃ）に示すように、排ガス導入管２の開閉弁２１および気体導出管３の開閉弁３１を閉じ、吸引ブロワー４の稼働を停止する。次に、バグフィルター１２の内側に圧縮空気を導入して、バグフィルター１２に付着している炭素粉末６および油分７をバグフィルター１２から剥がして落下させ、集塵機１の下部にある開口１３から回収容器８に回収する（除去工程）。回収された油分含有炭素粉末は産業廃棄物として適宜廃棄処理する。
そして、この実施形態の排ガス処理方法では、炭素粉末付着工程→排ガス処理工程（油分含有炭素粉末付着工程でもある）→除去工程→炭素粉末付着工程の順に、各工程を繰り返している。 Next, when the pressure loss of the bag filter 12 reaches a predetermined value (a value that does not cause clogging and is a reference value determined by actual results), as shown in FIG. 1 (c), the exhaust gas introduction pipe. The on-off valve 21 of 2 and the on-off valve 31 of the gas outlet pipe 3 are closed, and the operation of the suction blower 4 is stopped. Next, compressed air is introduced inside the bag filter 12, carbon powder 6 and oil 7 adhering to the bag filter 12 are peeled off from the bag filter 12 and dropped, and collected from the opening 13 at the bottom of the dust collector 1. Collect in container 8 (removal step). The recovered oil-containing carbon powder is appropriately disposed of as industrial waste.
Then, in the exhaust gas treatment method of this embodiment, each step is repeated in the order of carbon powder adhesion step → exhaust gas treatment step (which is also an oil-containing carbon powder adhesion step) → removal step → carbon powder adhesion step.

この実施形態の排ガス処理方法によれば、炭素粉付着工程後のバグフィルター１２に排ガスを通して排ガス処理工程を行っているため、炭素粉付着工程を経ないバグフィルター１２に排ガスを通して排ガス処理工程を行った場合と比較して、バグフィルター１２が油分で目詰まりしにくくなる。その結果、バグフィルター１２の寿命が長くなる。また、排ガス処理工程で処理する排ガスをバグフィルター１２に通すことにより油分含有炭素粉末をバグフィルター１２に付着させているため、油分含有炭素粉末が集塵機１から炭素粉焼成炉に逆流した場合に、炭素粉焼成炉内の処理物の汚染が防止できる。 According to the exhaust gas treatment method of this embodiment, since the exhaust gas treatment step is performed by passing the exhaust gas through the bag filter 12 after the carbon powder adhesion step, the exhaust gas treatment step is performed by passing the exhaust gas through the bag filter 12 that does not undergo the carbon powder adhesion step. The bag filter 12 is less likely to be clogged with oil as compared with the case where the bag filter 12 is used. As a result, the life of the bag filter 12 is extended. Further, since the oil-containing carbon powder is attached to the bag filter 12 by passing the exhaust gas to be treated in the exhaust gas treatment step through the bag filter 12, when the oil-containing carbon powder flows back from the dust collector 1 to the carbon powder firing furnace, Contamination of the processed material in the carbon powder firing furnace can be prevented.

図２に示す炭素粉焼成設備は、タール等の炭素前駆体を焼成して炭素粉を得るための設備であって、第一の焼成炉（焼成炉Ｉ）２５、第二の焼成炉（焼成炉II）２６、バグフィルターを備えた集塵機１、集塵機１への排ガス導入管２と、集塵機１からの気体導出管３と、吸引ブロワー４と、吸引ブロワー４の排気口に接続された気体排出管５を備えている。排ガス導入管２には、第一の焼成炉２５からの排気管２５１と第二の焼成炉２６からの排気管２６１が接続されている。集塵機１の下部には炭素粉を収納する容器８１を設けている。 The carbon powder firing facility shown in FIG. 2 is a facility for firing a carbon precursor such as tar to obtain carbon powder, and is a first firing furnace (firing furnace I) 25 and a second firing furnace (firing). Sinter II) 26, a dust collector 1 equipped with a bug filter, an exhaust gas introduction pipe 2 to the dust collector 1, a gas outlet pipe 3 from the dust collector 1, a suction blower 4, and a gas discharge connected to the exhaust port of the suction blower 4. It is provided with a tube 5. An exhaust pipe 251 from the first firing furnace 25 and an exhaust pipe 261 from the second firing furnace 26 are connected to the exhaust gas introduction pipe 2. A container 81 for storing carbon powder is provided below the dust collector 1.

第一の焼成炉２５からの排ガスおよび第二の焼成炉２６からの排ガスは、吸引ブロワー４で吸引されて合流し、排ガス導入管２から集塵機１に導入され、バグフィルターで処理されて気体排出管５から大気中に放出される。
第一の焼成炉２５からの排ガスの流速は２００ｍ3／ｍｉｎ、第二の焼成炉２６からの排ガスの流速は５０ｍ3／ｍｉｎ、バグフィルターによる処理性能は２５０ｍ3／ｍｉｎである。 The exhaust gas from the first firing furnace 25 and the exhaust gas from the second firing furnace 26 are sucked by the suction blower 4 and merged, introduced into the dust collector 1 from the exhaust gas introduction pipe 2, processed by the bag filter, and discharged as gas. It is released into the atmosphere from tube 5.
The flow velocity of the exhaust gas from the first firing furnace 25 is 200 m 3 / min, the flow velocity of the exhaust gas from the second firing furnace 26 is 50 m 3 / min, and the processing performance by the bag filter is 250 m 3 / min.

この炭素粉焼成設備では、第二の焼成炉２６からの排ガスに粘着性の油分が含まれている。第一の焼成炉２５で焼成する炭素前駆体は、第二の焼成炉２６で焼成する炭素前駆体とは異なる前処理を行ったので、焼成時に油分はほとんど発生しない。第二の焼成炉２６からの油分がバグフィルターに固着して目詰まりを生じさせるため、実施形態の排ガス処理方法を適用する前は、例えば、バグフィルターの圧力損失が１５０ｍｍＨ2Ｏ（＝１．４７ｋＰａ）に達したタイミングでフィルター交換を行う場合、長い時でも２０日以内に、短い時には２日に一度の間隔でフィルター交換を行う必要があった。 In this carbon powder firing facility, the exhaust gas from the second firing furnace 26 contains an adhesive oil component. Since the carbon precursor fired in the first firing furnace 25 is pretreated differently from the carbon precursor fired in the second firing furnace 26, almost no oil is generated during firing. Since the oil from the second firing furnace 26 sticks to the bag filter and causes clogging, for example, before applying the exhaust gas treatment method of the embodiment, the pressure loss of the bag filter is 150 mmH 2 O (= 1. When the filter was replaced when it reached 47 kPa), it was necessary to replace the filter within 20 days at the longest time and once every two days at the shortest time.

この炭素粉焼成設備に対し、実施形態の排ガス処理方法を以下の手順で適用した。
先ず、第二の焼成炉２６で炭素前駆体を焼成して炭素粉末６を得た。この炭素粉末６の粒径は７〜８μｍであった。この炭素粉末６を容器８１に入れ、吸引ブロワー４を起動して、７ｋｇの炭素粉末６を、集塵機１の下部の開口１３から導入してバグフィルター１２に付着させた。つまり、炭素粉付着工程を行った。その結果、バグフィルター１２の表面に、厚さ０．５ｍｍの乾燥した炭素粉末６からなる層が形成された。 The exhaust gas treatment method of the embodiment was applied to this carbon powder firing facility by the following procedure.
First, the carbon precursor was fired in the second firing furnace 26 to obtain carbon powder 6. The particle size of the carbon powder 6 was 7 to 8 μm. The carbon powder 6 was put into the container 81, the suction blower 4 was started, and 7 kg of the carbon powder 6 was introduced from the opening 13 at the lower part of the dust collector 1 and attached to the bag filter 12. That is, the carbon powder adhesion step was performed. As a result, a layer made of dry carbon powder 6 having a thickness of 0.5 mm was formed on the surface of the bag filter 12.

次に、排ガス導入管２から集塵機１内へ排ガスを導入することで、排ガス処理工程を行った。排ガス導入時のバグフィルター１２の圧力損失は６０ｍｍＨ2Ｏ（＝５８８Ｐａ）程度であった。
排ガス処理工程では、バグフィルター１２の圧力損失を差圧計で常時測定した。そして、圧力損失が１５０ｍｍＨ2Ｏ（＝１．４７ｋＰａ）を超えた場合は、この排ガス処理を停止し、バグフィルター１２の内側に圧縮空気を吹き付けて、バグフィルター１２に付着している油分含有炭素粉末を剥がして落下させ、回収容器８内に回収した。つまり、除去工程を行った。 Next, the exhaust gas treatment step was performed by introducing the exhaust gas from the exhaust gas introduction pipe 2 into the dust collector 1. The pressure loss of the bag filter 12 at the time of introducing the exhaust gas was about 60 mmH 2 O (= 588 Pa).
In the exhaust gas treatment step, the pressure loss of the bag filter 12 was constantly measured with a differential pressure gauge. Then, when the pressure loss exceeds 150 mmH 2 O (= 1.47 kPa), this exhaust gas treatment is stopped, compressed air is blown inside the bag filter 12, and the oil-containing carbon adhering to the bag filter 12 is formed. The powder was peeled off, dropped, and collected in the collection container 8. That is, the removal step was performed.

上述の各工程を、炭素粉末付着工程→排ガス処理工程（油分含有炭素粉末付着工程でもある）→除去工程→炭素粉末付着工程の順に繰り返した。
その結果、実施形態の方法を適用した後は６０日以上、バグフィルター１２の圧力損失が１５０ｍｍＨ2Ｏ（＝１．４７ｋＰａ）を超えることがなかった。
この結果から、実施形態の排ガス処理方法によれば、従来の排ガス処理方法と比較して、バグフィルターの寿命を飛躍的に長くできることが分かる。 Each of the above steps was repeated in the order of carbon powder adhesion step → exhaust gas treatment step (which is also an oil-containing carbon powder adhesion step) → removal step → carbon powder adhesion step.
As a result, the pressure loss of the bag filter 12 did not exceed 150 mmH 2 O (= 1.47 kPa) for 60 days or more after applying the method of the embodiment.
From this result, it can be seen that according to the exhaust gas treatment method of the embodiment, the life of the bag filter can be dramatically extended as compared with the conventional exhaust gas treatment method.

１ 集塵機
１２ バグフィルター
１３ 開口
２ 排ガス導入管
２１ 排ガス導入管の開閉弁
２５ 第一の焼成炉
２５１ 排気管
２６ 第二の焼成炉
２６１ 排気管
３ 集塵機からの気体導出管
３１ 気体導出管の開閉弁
４ 吸引ブロワー
５ 吸引ブロワーからの気体排出管
６ 炭素粉末
７ 油分
８ 容器
８１ 乾燥した炭素粉末が入った容器 1 Dust collector 12 Bug filter 13 Opening 2 Exhaust gas introduction pipe 21 On / off valve of exhaust gas introduction pipe 25 First firing furnace 251 Exhaust pipe 26 Second firing furnace 261 Exhaust pipe 3 Gas outlet pipe from dust collector 31 On / off valve of gas outlet pipe 4 Suction blower 5 Gas discharge pipe from suction blower 6 Carbon powder 7 Oil content 8 Container 81 Container containing dried carbon powder

Claims (2)

炭素粉焼成炉で炭素前駆体を焼成して炭素粉を得るとともに、該炭素粉焼成炉で発生する排ガスをバグフィルターに通して、前記排ガスに含まれている油分含有炭素粉末を前記排ガスから取り除く排ガス処理方法であって、
得られた前記炭素粉を前記バグフィルターに付着させる炭素粉付着工程と、
前記炭素粉付着工程後の前記バグフィルターに前記排ガスを通して当該排ガスを処理する排ガス処理工程と、
を有するバグフィルターによる排ガス処理方法。 The carbon precursor is calcined in the carbon powder calcining furnace to obtain carbon powder, and the exhaust gas generated in the carbon powder calcining furnace is passed through a bag filter to remove the oil-containing carbon powder contained in the exhaust gas from the exhaust gas. It is an exhaust gas treatment method
A carbon powder adhering step of adhering the obtained carbon powder to the bag filter, and
An exhaust gas treatment step of passing the exhaust gas through the bag filter after the carbon powder adhesion step to treat the exhaust gas, and
Exhaust gas treatment method with a bag filter. 前記排ガス処理工程の最中に前記バグフィルターの圧力損失が所定値となった時点で、前記排ガス処理工程を停止し、前記バグフィルターに付着した前記油分含有炭素粉末を除去する除去工程を行う請求項１記載のバグフィルターによる排ガス処理方法。 When the pressure loss of the bag filter reaches a predetermined value during the exhaust gas treatment step, the exhaust gas treatment step is stopped and a removal step of removing the oil-containing carbon powder adhering to the bag filter is performed. Exhaust gas treatment method using the bag filter according to Item 1.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52125881A (en) * 1976-04-14 1977-10-22 Taisei Corp System for treating a waste gas containing a viscous material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52125881A (en) * 1976-04-14 1977-10-22 Taisei Corp System for treating a waste gas containing a viscous material

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