JP2002220593A - Dust removal device for heat exchanger heat transfer surface in coal gasifier - Google Patents
Dust removal device for heat exchanger heat transfer surface in coal gasifierInfo
- Publication number
- JP2002220593A JP2002220593A JP2001018135A JP2001018135A JP2002220593A JP 2002220593 A JP2002220593 A JP 2002220593A JP 2001018135 A JP2001018135 A JP 2001018135A JP 2001018135 A JP2001018135 A JP 2001018135A JP 2002220593 A JP2002220593 A JP 2002220593A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- gas
- heat exchanger
- striking rod
- heat transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G7/00—Cleaning by vibration or pressure waves
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/32—Devices for distributing fuel evenly over the bed or for stirring up the fuel bed
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/52—Ash-removing devices
- C10J3/526—Ash-removing devices for entrained flow gasifiers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
(57)【要約】 （修正有）
【課題】 石炭ガス化炉のガスクーラなど加圧使用する
熱交換器の伝熱管の付着ダストを払い落とすと共に有毒
高圧のＣＯガスが外部に漏れない安全，高信頼性の装置
を提供する。
【解決手段】 ダストを外部から貫通した打撃ロッド５
をエアノッカで打撃し、当て板５ａを介して伝熱管４に
衝撃を与えて払い落とす装置であって、打撃ロッドの前
半部を摺動可能に支持する筒状体６を石炭ガス化炉の圧
力容器２に取り付け、筒状体に高圧窒素ガス吹込みのラ
ビリンスシール８を設け、外端フランジ１０に打撃ロッ
ドの後半部を摺動可能に支持する軸封体９を結合し、軸
封体の外端フランジ９ｂにハウジング２２を結合し、ハ
ウジング内に打撃ロッドの頭部２６を装入し、ハウジン
グにエアノッカを貫通して取り付けた蓋体２８を結合し
てハウジングを密封した。
(57) [Summary] (Modified) [Problem] To remove dust adhering to the heat transfer tube of a heat exchanger used under pressure, such as a gas cooler for a coal gasifier, and to prevent toxic high-pressure CO gas from leaking outside. Provide a reliable device. SOLUTION: A striking rod 5 through which dust penetrates from outside.
Is blown off by applying an impact to the heat transfer tube 4 via an abutment plate 5a, and the tubular body 6 that slidably supports the first half of the striking rod is pressurized by the pressure of the coal gasifier. A labyrinth seal 8 for blowing high-pressure nitrogen gas is provided on the cylindrical body, and a shaft seal 9 for slidably supporting the rear half of the striking rod is connected to the outer end flange 10. The housing 22 was connected to the outer end flange 9b, the head 26 of the striking rod was inserted into the housing, and the housing was sealed by connecting the lid 28 which was attached to the housing through an air knocker.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、加圧下で運転され
る石炭ガス化炉の熱交換器の伝熱管に付着したダストを
払い落とす装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing dust adhering to heat transfer tubes of a heat exchanger of a coal gasifier operated under pressure.
【０００２】[0002]
【従来の技術】従来、石炭ガス化炉の熱交換器の伝熱管
に付着したダストを除去する手段としては、蒸気或いは
Ｎ2 ガスなどの噴霧媒体によりダストをスートブローす
る方法を採っていたが、石炭ガス化炉の生成ガスの性状
を希薄なものにするという欠点があった。2. Description of the Related Art Conventionally, as a means for removing dust adhering to a heat exchanger tube of a heat exchanger of a coal gasifier, a method of soot-blowing dust with a spray medium such as steam or N 2 gas has been adopted. There is a drawback that the properties of the gas produced from the coal gasifier are made lean.
【０００３】このようなことから、石炭ガス化炉の生成
ガスに悪影響を与えないスートブロー手段として、石炭
ガス化炉の出口からの生成ガス中の固形分を除いたクリ
ーンガスの一部を分岐抽出する管路を設け、該管路の途
中にクーラ、フィルタ、ガスコンプレッサ、アキューム
レータ、調整弁、スートブロア元弁を設け、前記管路を
石炭ガス化炉内の熱交換器を構成する伝熱管の外表面に
付着した固形分（ダスト）を除去するスートブロアに連
結したスートブロー手段がある（先行技術文献として特
開昭６１−２２１２９３号公報がある）。このスートブ
ロー手段によると、精製ガスを循環投入するので、石炭
ガス化炉の生成ガスのガス性状に何ら悪影響を及ぼさな
い。[0003] For this reason, as a soot blowing means which does not adversely affect the gas produced from the coal gasifier, a part of the clean gas excluding solids in the produced gas from the outlet of the coal gasifier is branched and extracted. A cooler, a filter, a gas compressor, an accumulator, a regulating valve, a soot blower main valve are provided in the middle of the pipe, and the pipe is provided outside of a heat transfer tube constituting a heat exchanger in a coal gasifier. There is a soot blow means connected to a soot blower for removing solids (dust) attached to the surface (Japanese Patent Application Laid-Open No. 61-212293 is a prior art document). According to this soot blowing means, the purified gas is circulated and charged, so that there is no adverse effect on the gas properties of the gas produced in the coal gasifier.
【０００４】然し乍ら、上記スートブロー手段は、大が
かりな設備であり、その設置，運転，メンテナンス等に
は多額の費用を要する。また、運転中の熱交換器の伝熱
管の外表面にクリーンガスを吹き付けて付着した固形分
（ダスト）を除去するには、生成ガスの圧力よりも高い
圧力でクリーンガスを吹き付けなければならないので、
前記調整弁を開閉するのにスートブロアの噴霧圧力コン
トローラが必要であり、さらに前記ガスコンプレッサを
適正なインターバルで運転するには、アキュームレータ
の圧力を検出する圧力計が必要である。[0004] However, the soot blow means is a large-scale facility, and its installation, operation, maintenance, and the like require a large amount of cost. In addition, in order to blow solid gas (dust) on the outer surface of the heat exchanger tubes of the heat exchanger during operation to remove solids (dust) attached thereto, the clean gas must be blown at a pressure higher than the pressure of the generated gas. ,
A soot blower spray pressure controller is required to open and close the regulating valve, and a pressure gauge for detecting the pressure of the accumulator is required to operate the gas compressor at appropriate intervals.
【０００５】上記の外、石炭ガス化炉の熱回収用熱交換
器または熱回収ボイラに、伝熱管の上部に堆積した灰分
を吹き落すスートブロー設備を設置することや、伝熱管
の上方から石炭粒子を噴出させ、伝熱管の上部に堆積し
た灰分を払い落す石炭粒子噴出装置を設置することが、
特許第３０１７６２３号公報に開示されている。In addition to the above, a soot blow facility for blowing off ash deposited on the upper part of the heat transfer tube is installed in a heat recovery heat exchanger or a heat recovery boiler of a coal gasifier, and a coal particle is installed from above the heat transfer tube. It is possible to install a coal particle ejection device that blows off ash deposited on the top of the heat transfer tube.
It is disclosed in Japanese Patent No. 3017623.
【０００６】然し乍ら、実際にこのようなスートブロー
設備や石炭粒子噴出装置を運用しようとすると、前述の
スートブロー手段と同様の大がかりな設備が必要とな
り、その設置，運転，メンテナンス等には多額の費用を
要する。However, to actually operate such a soot blower or a coal particle ejector, a large-scale facility similar to the above-mentioned soot blower is required, and installation, operation, maintenance and the like require a large amount of cost. It costs.
【０００７】[0007]
【発明が解決しようとする課題】そこで本発明は、加圧
下で使用される熱交換器の伝熱管に付着したダストを払
い落とすのに熱交換器の伝熱管の外表面にクリーンガス
を吹き付けたり、石炭粒子を噴出したりするのをやめ
て、外部から伝熱管に衝撃を与えて払い落とそうとする
ものであり、これにより設置，運転，メンテナンス等に
要した多額の費用を削減しようとするものである。また
本発明は、大気圧下で使用される通常の熱交換器の伝熱
管に付着したダストを払い落とす槌打装置とは異なり、
加圧下で使用される熱交換器の伝熱管に衝撃を与える機
構に、有毒且つ高圧の内部ガス（ＣＯガス）が外部に決
して漏れないような手段を講じて安全性、信頼性を高め
ようとするものである。SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for removing dust adhering to a heat exchanger tube of a heat exchanger used under pressure by blowing a clean gas onto the outer surface of the heat exchanger tube. The purpose is to stop blowing out coal particles and to blow off the heat transfer tube by applying an external impact, thereby reducing the large amount of cost required for installation, operation, maintenance, etc. It is. Also, the present invention is different from a hammering device that removes dust attached to a heat transfer tube of a normal heat exchanger used under atmospheric pressure,
To improve safety and reliability by taking measures to prevent the toxic and high-pressure internal gas (CO gas) from leaking outside to the mechanism that impacts the heat transfer tube of the heat exchanger used under pressure. Is what you do.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
の本発明の石炭ガス化炉における熱交換器伝熱面のダス
ト払い落とし装置は、石炭ガス化炉において加圧下で使
用される熱交換器の伝熱管に付着したダストを、外部か
ら貫通させた打撃ロッドをエアノッカで打撃し、当て板
を介して伝熱管に衝撃を与えることで払い落とす装置で
あって、前記打撃ロッドの前半部を摺動可能に支持する
筒状体が石炭ガス化炉の圧力容器に取り付けられ、該筒
状体に高圧窒素ガス吹込みのラビリンスシールが設けら
れ、前記筒状体の外端のフランジに前記打撃ロッドの後
半部を摺動可能に支持する軸封体がＯリングを挾んでフ
ランジ結合され、該軸封体の内部にＮ2 ガス圧封空間が
設けられてＮ2 ガス供給管が連通され、軸封体の両端に
スクイーズパッキンが設けられ、軸封体の打撃ロッド支
持部にドライベアリングが設けられ、前記軸封体の外端
のフランジにハウジングがフランジ結合され、このハウ
ジング内に前記打撃ロッドの頭部が装入され、前記ハウ
ジングにエアノッカを貫通して取り付けた蓋体が結合さ
れてハウジングが密封され、前記蓋体と前記打撃ロッド
の頭部との間に打撃ロッドが外方へ押し出されるのを抑
制するコイルスプリングが張設され、前記ハウジング内
に石炭ガス化炉のガス通路に連なる導管が連通されて成
るものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a dust removing device for a heat transfer surface of a heat exchanger in a coal gasifier according to the present invention is provided. Dust attached to the heat transfer tube of the vessel, is a device that blows off by hitting a hitting rod penetrated from the outside with an air knocker and applying an impact to the heat transfer tube via a backing plate, wherein the first half of the hitting rod is removed. A cylindrical body slidably supported is attached to a pressure vessel of a coal gasifier, and a labyrinth seal for blowing high-pressure nitrogen gas is provided on the cylindrical body, and the impact is applied to a flange at an outer end of the cylindrical body. A shaft sealing body that slidably supports the rear half of the rod is flange-connected with an O-ring interposed therebetween. An N 2 gas pressure sealing space is provided inside the shaft sealing body, and an N 2 gas supply pipe communicates therewith. Squeeze packing on both ends of shaft seal Is provided, a dry bearing is provided on a striking rod support portion of the shaft seal, a housing is flanged to a flange at an outer end of the shaft seal, and a head of the striking rod is inserted into the housing, A coil spring that suppresses the impact rod from being pushed outward between the lid and the head of the impact rod is connected to a lid body attached to the housing through an air knocker and the housing is sealed. The housing is stretched, and a conduit communicating with a gas passage of the coal gasifier is communicated within the housing.
【０００９】[0009]
【発明の実施の形態】本発明による石炭ガス化炉におけ
る熱交換器伝熱面のダスト払い落とし装置の実施形態を
図によって説明する。図１において、１は石炭ガス化炉
の円筒のガスクーラ（熱交換器）で、２はそのガスクー
ラ１の圧力容器である。ガスクーラ１の内部３には伝熱
管４が同心に且つ垂直に配されている。この伝熱管４に
付着したダストを払い落とすために伝熱管４に衝撃を与
える打撃ロッド５は、伝熱管４に取り付けられた当て板
５ａを介して伝熱管４に当接されている。６は前記打撃
ロッド５の前半部を摺動可能に支持する筒状体で、該筒
状体６は前記圧力容器２に容器中心に向いて水平に取り
付けられ、内周側にＮ2ガス吹き込み管７を備えたラビ
リンスシール８が設けられている。９は前記打撃ロッド
５の後半部を摺動可能に支持する軸封体で、該軸封体９
は前記筒状体６と芯合わせされて筒状体６の外端のフラ
ンジ１０に図２に示すように一方のフランジ９ａがＯリ
ング１１を挾んでボルト１２，ナット１３にて結合され
ている。この軸封体９の内部に図２に示すようにＮ2 ガ
ス圧封空間１４が設けられ、このＮ2 ガス圧封空間１４
にＮ 2 ガス供給管１５が連通されている。軸封体９の両
端には夫々軸シール材としてスクイーズパッキン１６が
装着されて環状の押えプレート１７にて押えられ、この
押えプレート１７が軸封体９の端面凹部１８に嵌められ
てボルト１９にて固定されている。軸封体９の両側の打
撃ロッド支持部２０には夫々ドライベアリング２１が設
けられている。前記軸封体９の外端のフランジ９ｂには
ハウジング２２のフランジ２３ａがボルト２４，ナット
２５にて結合され、このハウジング２２内に前記打撃ロ
ッド５の頭部２６が装入され、図１に示すようにハウジ
ング２２の他端のフランジ２３ｂに、エアノッカ２７を
貫通して取り付けた蓋体２８がボルト２９，ナット３０
にて結合されてハウジング２２が密封されている。前記
ハウジング２２内で蓋体２８と前記打撃ロッド５の頭部
２６との間には、打撃ロッド５が外へ押し出されるのを
抑制するためにガスクーラ１の内圧による反力とばね反
力とが釣り合うようにばねの強さを設定したコイルスプ
リング３１が張設され、ハウジング２２内には石炭ガス
化炉の図示せぬガス通路に連なる導管３２が連通されて
いる。DETAILED DESCRIPTION OF THE INVENTION In a coal gasifier according to the present invention,
Of the heat exchanger heat transfer surface dust removal device
This will be described with reference to the drawings. In FIG. 1, 1 is a coal gasifier
Cylindrical gas cooler (heat exchanger), 2 is the gas cooler
3 is a pressure vessel of FIG. Heat transfer to the inside 3 of the gas cooler 1
Tubes 4 are arranged concentrically and vertically. This heat transfer tube 4
Impact is applied to heat transfer tube 4 to remove attached dust
The striking rod 5 is a backing plate attached to the heat transfer tube 4.
It is in contact with the heat transfer tube 4 via 5a. 6 is the blow
A cylindrical body slidably supporting the front half of the rod 5;
The body 6 is placed horizontally on the pressure vessel 2 facing the center of the vessel.
Attached, and NTwoRavi with gas injection pipe 7
A rinse seal 8 is provided. 9 is the hit rod
5 is a shaft seal that slidably supports the rear half of the shaft seal 9.
Is aligned with the cylindrical body 6 so that the outer end of the cylindrical body 6
As shown in FIG. 2, one flange 9a is
Are connected by bolts 12 and nuts 13
ing. As shown in FIG.Two Moth
A pressure sealing space 14 is provided.Two Gas sealing space 14
N Two The gas supply pipe 15 is connected. Both shaft seals 9
Squeeze packing 16 is provided at each end as a shaft seal material.
It is mounted and pressed by the annular pressing plate 17,
The holding plate 17 is fitted into the end recess 18 of the shaft sealing body 9.
And is fixed by bolts 19. Driving on both sides of shaft seal 9
A dry bearing 21 is provided on each of the strike rod support portions 20.
Have been killed. The flange 9b at the outer end of the shaft sealing body 9
The flange 23a of the housing 22 includes a bolt 24 and a nut.
25, and the inside of the housing 22
The head 26 of the head 5 is inserted, and the housing
The air knocker 27 is attached to the flange 23b at the other end of the ring 22.
Bolt 29 and nut 30
And the housing 22 is sealed. Said
The lid 28 and the head of the striking rod 5 in the housing 22
Between 26 and 26, the impact rod 5 is pushed out.
In order to suppress the reaction force due to the internal pressure of the gas cooler 1 and the spring reaction
Coil spr with spring strength set to balance force
A ring 31 is stretched, and coal gas is
A conduit 32 is connected to a gas passage (not shown) of the gasification furnace.
I have.
【００１０】次に上述のように構成された本発明の石炭
ガス化炉における熱交換器伝熱面のダスト払い落とし装
置の作用について説明する。石炭ガス化炉の操業中、円
筒のガスクーラ（熱交換器）１の内圧は２０Ｋとなる。
このような加圧下で使用されているガスクーラ１の内部
の伝熱管４の表面にはダストが付着し、堆積していく。
このダストを払い落とすために打撃ロッド５の頭部２６
をエアノッカ２７で打撃し、その衝撃エネルギーを打撃
ロッド５の先端より当て板５ａを介して伝熱管４の表面
に伝える。これにより機械的なインパルスが伝熱管４の
表面の高周波振動に変換され、その際表面には高い加速
度が生じ、ダストにも作用し、その時発生した力により
ダストは伝熱管４の表面から剥離し、落下する。Next, the operation of the apparatus for removing dust on the heat transfer surface of the heat exchanger in the coal gasifier of the present invention having the above-described structure will be described. During operation of the coal gasifier, the internal pressure of the cylindrical gas cooler (heat exchanger) 1 becomes 20K.
Dust adheres to and accumulates on the surface of the heat transfer tube 4 inside the gas cooler 1 used under such pressurization.
The head 26 of the striking rod 5 is used to remove the dust.
And the impact energy is transmitted from the tip of the striking rod 5 to the surface of the heat transfer tube 4 via the contact plate 5a. As a result, the mechanical impulse is converted into high-frequency vibrations on the surface of the heat transfer tube 4, and at that time, a high acceleration is generated on the surface and acts on the dust. At that time, the dust is separated from the surface of the heat transfer tube 4. To fall.
【００１１】上記のダストの払い落とし中、ガスクーラ
（熱交換器）１の内圧（２０Ｋ）により打撃ロッド５は
外へ押し出されようとするが、ハウジング２２内で蓋体
２８と打撃ロッド５の頭部２６との間に張設したコイル
スプリング３１の強さを前記内圧による反力とばね反力
が釣り合うように設定しているので、打撃ロッド５が外
へ押し出されるのが抑制される。そして、コイルスプリ
ング３１はガスクーラ１の外部の大気圧下に設置され、
高温ガスからの影響がなく、劣化等の現象が起こりにく
く、信頼性が高い。While the dust is being removed, the striking rod 5 is pushed out by the internal pressure (20 K) of the gas cooler (heat exchanger) 1. Since the strength of the coil spring 31 stretched between the coil spring 31 and the portion 26 is set such that the reaction force due to the internal pressure and the spring reaction force are balanced, the pushing out of the striking rod 5 is suppressed. And the coil spring 31 is installed under atmospheric pressure outside the gas cooler 1,
There is no influence from high-temperature gas, phenomena such as deterioration hardly occur, and reliability is high.
【００１２】また、ガスクーラ１の内部ガス（ＣＯガ
ス）は有毒であるので、打撃ロッド５の貫通部の軸シー
ルは万全でなければならない。このため本発明のダスト
払い落とし装置では、軸封体９の両端にスクイーズパッ
キン１６が装着され、このスクイーズパッキン１６間の
内部にはＮ2 ガス圧封空間１４が設けられて、このＮ2
ガス圧封空間１４にＮ2 ガス供給管１５よりガスクーラ
１の内圧（２０Ｋ）＋αの高圧窒素が圧封されているの
で、万一スクイーズパッキン１６からのリークが発生し
ても高圧窒素によりＣＯガスを外部へ漏洩することがな
い。例えＮ2 ガス圧封空間１４よりハウジング２２内に
ＣＯガスが漏れ出してきた場合でも導管３２から石炭ガ
ス化炉の図示せぬガス通路に放出できるので、外部へ決
して漏出することがない。Further, since the internal gas (CO gas) of the gas cooler 1 is toxic, the shaft seal at the penetrating portion of the striking rod 5 must be thorough. Therefore, in the dust dust removal device of the present invention, a squeeze packing 16 is attached to both ends of the sealing body 9, the interior between the squeeze packing 16 is provided with a N 2 gas圧封space 14, the N 2
Since high-pressure nitrogen of the internal pressure (20K) + α of the gas cooler 1 is sealed in the gas sealing space 14 from the N 2 gas supply pipe 15, even if a leak from the squeeze packing 16 occurs, the CO gas is removed by the high-pressure nitrogen. Does not leak to the outside. Even if the CO gas leaks from the N 2 gas sealing space 14 into the housing 22, it can be discharged from the conduit 32 to a gas passage (not shown) of the coal gasifier, so that it never leaks outside.
【００１３】さらに、軸封体９において打撃ロッド５
は、ドライベアリング２１により支持されているので、
軸シールであるスクイーズパッキン１６には打撃ロッド
５の重量を支持する負担がない。Further, in the shaft sealing body 9, the striking rod 5
Is supported by the dry bearing 21,
The squeeze packing 16 serving as a shaft seal has no burden to support the weight of the striking rod 5.
【００１４】また、ガスクーラ１の圧力容器２に取り付
けられ打撃ロッド５の前半部を支持した筒状体６の内周
側にはラビリンスシール８を設けられ、これにＮ2 ガス
吹き込み管７よりシールガスとして高圧窒素ガスを少量
吹き込んでいるので、ガスクーラ２の内部のダストが筒
状体６の内周面と打撃ロッド５の外周面との微細な隙間
に進入してきても、ダストはラビリンスシール８の部分
で止めることができ、従って軸封体９の軸シール材であ
るスクイーズパッキン１６を傷付けることがない。A labyrinth seal 8 is provided on the inner peripheral side of a cylindrical body 6 which is attached to the pressure vessel 2 of the gas cooler 1 and supports the front half of the striking rod 5, and a labyrinth seal 8 is provided on the labyrinth seal 8 by a N 2 gas blowing pipe 7. Since a small amount of high-pressure nitrogen gas is blown as a gas, even if dust inside the gas cooler 2 enters the minute gap between the inner peripheral surface of the cylindrical body 6 and the outer peripheral surface of the striking rod 5, the dust remains in the labyrinth seal 8 Therefore, the squeeze packing 16 serving as the shaft sealing material of the shaft sealing body 9 is not damaged.
【００１５】さらに、筒状体６と軸封体９とのフランジ
接合部はＯリング１１によりシールされているので、Ｃ
Ｏガスが外部へ漏出することがない。Further, the flange joint between the cylindrical body 6 and the shaft sealing body 9 is sealed by the O-ring 11, so that C
O gas does not leak outside.
【００１６】[0016]
【発明の効果】以上の説明で判るように本発明の石炭ガ
ス化炉における熱交換器伝熱面のダスト払い落とし装置
は、加圧下で使用されている熱交換器の伝熱管の表面に
付着したダストを、伝熱管に当て板を介して当接した打
撃ロッドをエアノッカで打撃し、その衝撃エネルギーを
伝熱面に伝えることにより、剥離落下させることができ
るので、従来のように熱交換器の伝熱管の外表面にクリ
ーンガスを吹き付けたり、石炭粒子を噴出したりする必
要がなく、従って、大がかりな設備は不要で、これの設
置，運転，メンテナンス等に要した多額の費用を削減で
きる。As can be seen from the above description, the dust removing device for the heat transfer surface of the heat exchanger in the coal gasifier according to the present invention adheres to the surface of the heat transfer tube of the heat exchanger used under pressure. The blown dust hits the heat transfer tube via a contact plate with an air knocker, and the impact energy is transferred to the heat transfer surface, so that the dust can be separated and dropped. There is no need to spray clean gas or blow out coal particles on the outer surface of the heat transfer tube, thus eliminating the need for large-scale equipment and reducing the large cost required for installation, operation, maintenance, etc. .
【００１７】また、加圧下で使用されている熱交換器の
伝熱管に衝撃を与える打撃ロッドの貫通支持部に、ラビ
リンスシールによるダストシール、スクイーズパッキン
及び圧封窒素によるガスシールを構成しているので、有
毒な内部ガス（ＣＯガス）は外部に漏れ出ることはな
く、しかもガスシール部はダスト及び高温から保護され
ているので、安全性，信頼性が高く、エアノッカの打撃
による打撃ロッドの伝熱管への衝撃エネルギーの伝達も
効率よく行われ、ダストの剥離，落下がスムーズに行わ
れる。In addition, a dust seal using a labyrinth seal, a squeeze packing, and a gas seal using nitrogen are formed in the penetrating support portion of the striking rod that impacts the heat transfer tube of the heat exchanger used under pressure. Since the toxic internal gas (CO gas) does not leak to the outside and the gas seal is protected from dust and high temperature, the safety and reliability are high, and the heat transfer tube of the impact rod by the impact of the air knocker The transmission of impact energy to the dust is performed efficiently, and the dust is separated and dropped smoothly.
【００１８】さらに、打撃ロッドのシール部とは別にド
ライベアリングによる軸受部を設けているので、軸シー
ル材であるスクイーズパッキンの負担を軽減でき、シー
ル機能の信頼性を長期にわたって維持できる。Further, since a bearing portion made of a dry bearing is provided separately from the sealing portion of the striking rod, the load on the squeeze packing as the shaft sealing material can be reduced, and the reliability of the sealing function can be maintained for a long period of time.
【図１】本発明の石炭ガス化炉における熱交換伝熱面の
ダスト払い落とし装置の断面図である。FIG. 1 is a cross-sectional view of a dust removing device for a heat exchange heat transfer surface in a coal gasifier according to the present invention.
【図２】図１の要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.
１ ガスクーラ（熱交換器） ２ 圧力容器 ３ ガスクーラの内部 ４ 伝熱管 ５ 打撃ロッド ５ａ 当て板 ６ 筒状体 ７ Ｎ2 ガス吹き込み管 ８ ラビリンスシール ９ 軸封体 ９ａ，９ｂ 軸封体のフランジ １０ 筒状体外端のフランジ １１ Ｏリング １２ ボルト １３ ナット １４ Ｎ2ガス圧封空間 １５ Ｎ2ガス供給管 １６ スクイーズパッキン １７ 押えプレート １８ 端面凹部 １９ ボルト ２０ 打撃ロッド支持部 ２１ ドライベアリング ２２ ハウジング ２３ａ，２３ｂ ハウジングのフランジ ２４ ボルト ２５ ナット ２６ 打撃ロッドの頭部 ２７ エアノッカ ２８ 蓋体 ２９ ボルト ３０ ナット ３１ コイルスプリング ３２ 導管DESCRIPTION OF SYMBOLS 1 Gas cooler (heat exchanger) 2 Pressure vessel 3 Inside of gas cooler 4 Heat transfer tube 5 Striking rod 5a Backing plate 6 Cylindrical body 7 N2 Gas blowing pipe 8 Labyrinth seal 9 Shaft sealing body 9a, 9b Flange of shaft sealing body 10 cylinder Flange at outer end of body 11 O-ring 12 Bolt 13 Nut 14 N 2 gas sealing space 15 N 2 gas supply pipe 16 Squeeze packing 17 Pressing plate 18 End recess 19 Bolt 20 Striking rod support 21 Dry bearing 22 Housing 23a, 23b Housing Flange 24 bolt 25 nut 26 hitting rod head 27 air knocker 28 lid 29 bolt 30 nut 31 coil spring 32 conduit
Claims (1)
る熱交換器の伝熱管に付着したダストを、外部から貫通
させた打撃ロッドをエアノッカで打撃し、当て板を介し
て伝熱管に衝撃を与えることで払い落とす装置であっ
て、前記打撃ロッドの前半部を摺動可能に支持する筒状
体が石炭ガス化炉の圧力容器に取り付けられ、該筒状体
に高圧窒素ガス吹込みのラビリンスシールが設けられ、
前記筒状体の外端のフランジに前記打撃ロッドの後半部
を摺動可能に支持する軸封体がＯリングを挾んでフラン
ジ結合され、該軸封体の内部にＮ2ガス圧封空間が設け
られてＮ2 ガス供給管が連通され、軸封体の両端にスク
イーズパッキンが設けられ、軸封体の打撃ロッド支持部
にドライベアリングが設けられ、前記軸封体の外端のフ
ランジにハウジングがフランジ結合され、このハウジン
グ内に前記打撃ロッドの頭部が装入され、前記ハウジン
グにエアノッカを貫通して取り付けた蓋体が結合されて
ハウジングが密封され、前記蓋体と前記打撃ロッドの頭
部との間に打撃ロッドが外方へ押し出されるのを抑制す
るコイルスプリングが張設され、前記ハウジング内に石
炭ガス化炉のガス通路に連なる導管が連通されて成る石
炭ガス化炉における熱交換器伝熱面のダスト払い落とし
装置。1. A dust rod attached to a heat exchanger tube of a heat exchanger used under pressure in a coal gasifier is hit with a striking rod, which is penetrated from the outside, by an air knocker, and the dust is impacted on the heat exchanger tube through a backing plate. A cylindrical body slidably supporting the first half of the impact rod is attached to a pressure vessel of a coal gasifier, and a high-pressure nitrogen gas blown into the cylindrical body. A labyrinth seal is provided,
A shaft sealing body that slidably supports the rear half of the striking rod is flange-connected to an outer end flange of the cylindrical body with an O-ring interposed therebetween, and an N 2 gas sealing space is formed inside the shaft sealing body. The N 2 gas supply pipe is communicated, a squeeze packing is provided at both ends of the shaft seal, a dry bearing is provided at a striking rod support portion of the shaft seal, and a housing is provided at a flange at an outer end of the shaft seal. Are flange-coupled, the head of the striking rod is inserted into the housing, a lid attached to the housing through an air knocker is joined, the housing is sealed, and the head of the lid and the striking rod are A coil spring for preventing the impact rod from being pushed outward is stretched between the portion and the housing, and a conduit communicating with a gas passage of the coal gasifier is communicated within the housing. Dust removing device for heat exchanger heat transfer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001018135A JP3657198B2 (en) | 2001-01-26 | 2001-01-26 | Dust removal device for heat exchanger surface of coal gasifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001018135A JP3657198B2 (en) | 2001-01-26 | 2001-01-26 | Dust removal device for heat exchanger surface of coal gasifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002220593A true JP2002220593A (en) | 2002-08-09 |
| JP3657198B2 JP3657198B2 (en) | 2005-06-08 |
Family
ID=18884194
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001018135A Expired - Fee Related JP3657198B2 (en) | 2001-01-26 | 2001-01-26 | Dust removal device for heat exchanger surface of coal gasifier |
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