JP2008056548A - Combustion gas extraction probe - Google Patents

Combustion gas extraction probe Download PDF

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JP2008056548A
JP2008056548A JP2006238450A JP2006238450A JP2008056548A JP 2008056548 A JP2008056548 A JP 2008056548A JP 2006238450 A JP2006238450 A JP 2006238450A JP 2006238450 A JP2006238450 A JP 2006238450A JP 2008056548 A JP2008056548 A JP 2008056548A
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inner cylinder
combustion gas
probe
tip
outer cylinder
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JP5179030B2 (en
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Yukinori Sakamoto
幸教 坂本
Tomomichi Nakamura
朋道 中村
Takahiko Suzuki
貴彦 鈴木
Masaaki Shibazaki
雅昭 柴崎
Yutaka Harashima
豊 原島
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Taiheiyo Cement Corp
Taiheiyo Engineering Corp
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Taiheiyo Cement Corp
Taiheiyo Engineering Corp
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes

Abstract

<P>PROBLEM TO BE SOLVED: To secure the stable operation of a chlorine by-pass system or the like in a cement production apparatus by extending the service life of a probe for extracting a combustion gas while cooling the combustion gas. <P>SOLUTION: In the combustion gas extraction probe 1 provided with an inner cylinder 2 in which the combustion gas at a high temperature flows and an outer cylinder 3 surrounding the inner cylinder and forming a passage 8 between the inner cylinder 2 and the outer cylinder 3 through which a gas having a temperature lower than the combustion gas flows to bleed the combustion gas cooled by a low temperature gas, the top end of the inner cylinder is relatively movable to the top end of the outer cylinder in the axial line direction of the probe without integrating the top end of the inner cylinder with the top end of the outer cylinder. In the bleeding of the combustion gas while cooling, even if extending in the longitudinal direction of the probe by the thermal expansion, the top end of the inner cylinder moves relatively to the top end of the outer cylinder having smaller thermal expansion to prevent the excess thermal loading on the top end of the probe and to prevent the breaking or the falling down of the top end of the probe due to the thermal stress. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、燃焼ガス抽気プローブに関し、特に、セメントキルンのキルン尻からボトムサイクロンに至るまでのキルン排ガス流路より、燃焼ガスの一部を抽気して塩素を除去するための塩素バイパスシステム等に用いられるプローブに関する。   The present invention relates to a combustion gas extraction probe, and more particularly to a chlorine bypass system for extracting a part of combustion gas from a kiln exhaust gas passage from a kiln bottom of a cement kiln to a bottom cyclone to remove chlorine. It relates to the probe used.

従来、セメント製造設備におけるプレヒーターの閉塞等の問題を引き起こす原因となる塩素、硫黄、アルカリ等の中で、塩素が特に問題となることに着目し、セメントキルンの入口フード付近より燃焼ガスの一部を抽気して塩素を除去する塩素バイパスシステムが用いられている。この塩素バイパスシステムには、セメントキルンの排ガス流路より燃焼ガスを冷却しながら抽気するためのプローブが設置される。   In the past, attention has been paid to the fact that chlorine is a particular problem among chlorine, sulfur, alkali, etc. that cause problems such as clogging of preheaters in cement production facilities. A chlorine bypass system that bleeds the part and removes chlorine is used. This chlorine bypass system is provided with a probe for extracting the combustion gas while cooling it from the exhaust gas passage of the cement kiln.

このプローブの一例として、特許文献１には、ガス抽気系に接続されている内管と、この内管のダクト内への突出先端の近傍に大気を導く外管とで構成される二重管構造のバイパス管が提案されている。   As an example of this probe, Patent Document 1 discloses a double pipe composed of an inner pipe connected to a gas extraction system and an outer pipe that guides the atmosphere to the vicinity of the projecting tip of the inner pipe into the duct. Structural bypass pipes have been proposed.

また、特許文献２には、二重管構造のプローブをキルン排ガス流路に連通させ、該プローブの内管を介してキルン排ガスの一部を抽気するとともに、該プローブの内管と外管との間の流体通路に冷却気体を供給し、該冷却気体を内管の先端部内方に案内して該プローブの先端部に混合急冷域を形成するキルンバイパスにおける排ガス冷却装置が開示されている。   Further, in Patent Document 2, a probe having a double-pipe structure is communicated with a kiln exhaust gas flow path, and a part of the kiln exhaust gas is extracted through the inner pipe of the probe, and an inner tube and an outer tube of the probe are extracted. An exhaust gas cooling device in a kiln bypass is disclosed in which a cooling gas is supplied to a fluid passage between the two, and the cooling gas is guided inwardly at the tip of the inner tube to form a mixed quenching region at the tip of the probe.

さらに、特許文献３には、プローブの先端金物の焼損を防止し、プローブ内で均一に燃焼ガスを急冷することがきるとともに、外径を小さく抑えるため、高温の燃焼ガスが流れる円筒状の内筒と、内筒を囲繞する円筒状の外筒と、内筒に穿設された低温のガスの吐出孔と、内筒と外筒との間に低温ガスを供給し、吐出孔から低温のガスを、高温の燃焼ガスの吸引方向に対して略々直角中心方向に吐出させる低温ガス供給手段とを備える燃焼ガス抽気プローブが提案されている。
特開平０２−１１６６４９号公報 特開平１１−３５３５５号公報 国際公開ＷＯ２００５／０５０１１４号パンフレット Furthermore, Patent Document 3 discloses a cylindrical inner flow through which high-temperature combustion gas flows in order to prevent burning of the metal tip of the probe and quench the combustion gas uniformly in the probe and to keep the outer diameter small. A low temperature gas is supplied between the inner cylinder and the outer cylinder, and a low temperature gas is supplied between the inner cylinder and the outer cylinder. There has been proposed a combustion gas extraction probe comprising a low-temperature gas supply means for discharging gas in a central direction substantially perpendicular to the suction direction of the high-temperature combustion gas.
JP 02-116649 A JP-A-11-35355 International Publication WO2005 / 050114 Pamphlet

近年、塩素含有リサイクル資源の活用量の増加に伴い、セメントキルンに持ち込まれる塩素の量が増加している。そのため、セメント製造設備の安定運転を継続する上で、塩素バイパスシステムの安定運転及び稼働率の向上が不可欠の状況になっている。   In recent years, the amount of chlorine brought into cement kilns has increased along with an increase in the use of chlorine-containing recycling resources. Therefore, in order to continue the stable operation of the cement manufacturing facility, the stable operation of the chlorine bypass system and the improvement of the operation rate are indispensable.

しかし、上記特許文献１乃至３に記載のプローブなどは、二重管を構成する内筒の先端部と、外筒の先端部とが先端金物等を介して一体化されているため、内筒を通過する高温の燃焼ガスによって内筒が熱膨張し、内筒の先端部がプローブの長手方向に伸長すると、外筒側は、高温の燃焼ガスに直接曝されないことから熱膨張が少ないため、プローブの先端部に過大な熱負荷がかかり、熱応力が発生する。この熱応力により、先端金物と内筒との接合部に亀裂が生じたり、先端金物等が破断して脱落することによりプローブの寿命が短くなり、塩素バイパスシステムの安定運転及び稼働率の向上を図ることができないという問題があった。   However, in the probes described in Patent Documents 1 to 3, the tip of the inner cylinder that constitutes the double tube and the tip of the outer cylinder are integrated via a metal tip, etc. When the inner cylinder is thermally expanded by the high-temperature combustion gas passing through and the tip of the inner cylinder extends in the longitudinal direction of the probe, the outer cylinder side is not directly exposed to the high-temperature combustion gas, so there is little thermal expansion. An excessive heat load is applied to the tip of the probe, generating thermal stress. Due to this thermal stress, cracks occur at the joint between the tip metal fitting and the inner cylinder, or the tip metal fitting breaks and drops, shortening the life of the probe and improving the stable operation and operating rate of the chlorine bypass system. There was a problem that could not be planned.

そこで、本発明は、上記従来の技術における問題点に鑑みてなされたものであって、プローブの寿命を延長させ、塩素バイパスシステム設備等の安定運転を確保することのできる燃焼ガス抽気プローブを提供することを目的とする。   Accordingly, the present invention has been made in view of the above-described problems in the prior art, and provides a combustion gas extraction probe that can extend the life of the probe and ensure stable operation of the chlorine bypass system equipment and the like. The purpose is to do.

上記目的を達成するため、本発明は、内部を高温の燃焼ガスが流れる内筒と、該内筒を囲繞し、該内筒との間に形成された通路を前記燃焼ガスより低温のガスが流れる外筒と、前記通路から前記低温のガスを前記通路に供給する冷却空気入口部と、前記内筒に穿設され、前記低温ガスを前記内筒の内部に吐出する吐出孔とを備え、該吐出孔から吐出された前記低温ガスによって冷却された前記燃焼ガスを抽気する燃焼ガス抽気プローブであって、前記内筒の先端部と前記外筒の先端部とを一体化することなく、該内筒の先端部を、前記外筒の先端部に対して、該プローブの軸線方向に相対移動可能としたことを特徴とする。   In order to achieve the above object, the present invention provides an inner cylinder through which a high-temperature combustion gas flows, and an inner cylinder surrounding the inner cylinder, and a gas lower in temperature than the combustion gas passes through a passage formed between the inner cylinder and the inner cylinder. An outer cylinder that flows, a cooling air inlet that supplies the low-temperature gas from the passage to the passage, and a discharge hole that is drilled in the inner cylinder and discharges the low-temperature gas into the inner cylinder. A combustion gas extraction probe for extracting the combustion gas cooled by the low-temperature gas discharged from the discharge hole, without integrating the tip of the inner cylinder and the tip of the outer cylinder, The distal end portion of the inner cylinder is movable relative to the distal end portion of the outer cylinder in the axial direction of the probe.

そして、本発明によれば、燃焼ガス抽気プローブの内筒の先端部と外筒の先端部とを一体化せずに、内筒の先端部を、外筒の先端部に対して、該プローブの軸線方向に相対移動可能としたため、該プローブを燃焼排ガス流路に設置して燃焼ガスを冷却しながら抽気した際に、内筒の先端部が熱膨張により長手方向に伸長しても、熱膨張の少ない外筒の先端部に対して相対的に移動し、該プローブの先端部に過大な熱負荷がかかるのを防止することができる。これによって、従来発生していた熱応力によるプローブ先端部の破断、脱落を回避することができる。   And according to this invention, without integrating the front-end | tip part of the inner cylinder and the front-end | tip part of an outer cylinder of a combustion gas extraction probe, the front-end | tip part of an inner cylinder is made into this probe with respect to the front-end | tip part of an outer cylinder. Therefore, when the probe is installed in the combustion exhaust gas flow path and extracted while cooling the combustion gas, the tip of the inner cylinder is expanded in the longitudinal direction due to thermal expansion. It moves relative to the distal end portion of the outer cylinder with little expansion, and it is possible to prevent an excessive heat load from being applied to the distal end portion of the probe. As a result, it is possible to avoid breakage and dropout of the probe tip due to thermal stress that has been generated conventionally.

前記燃焼ガス抽気プローブにおいて、前記外筒の先端部に固定され、該外筒と前記内筒の両先端部で形成される開口部を覆うように配置されるリング状の板状部材を備え、前記内筒の先端部と前記リング状の板状部材とを一体化することなく、該内筒の先端部を、前記リング状の板状部材に対して、前記プローブの軸線方向に相対移動可能とすることができる。これによって、内筒の先端部と外筒の先端部との間にリング状の板状部材が介在する燃焼ガス抽気プローブでも、上記と同様の作用効果を奏することができる。   In the combustion gas bleed probe, comprising a ring-shaped plate-like member that is fixed to the distal end portion of the outer cylinder and is disposed so as to cover an opening formed by both the distal ends of the outer cylinder and the inner cylinder, The tip of the inner cylinder can be moved relative to the ring-shaped plate member in the axial direction of the probe without integrating the tip of the inner cylinder and the ring-shaped plate member. It can be. Thus, even with a combustion gas extraction probe in which a ring-shaped plate-like member is interposed between the distal end portion of the inner cylinder and the distal end portion of the outer cylinder, the same operational effects as described above can be obtained.

また、前記燃焼ガス抽気プローブにおいて、前記内筒の上半周の先端を、前記リング状の板状部材との間に、該プローブの長手方向に隙間を有するように構成することができる。これにより、内筒の上半周の先端とリング状の板状部材との間から、低温ガスが内筒側に流れ、内筒の先端近傍におけるコーチングの生成を防止することができる。   In the combustion gas extraction probe, the tip of the upper half circumference of the inner cylinder may be configured to have a gap in the longitudinal direction of the probe between the ring-shaped plate member. As a result, the low temperature gas flows to the inner cylinder side from between the tip of the upper half circumference of the inner cylinder and the ring-shaped plate member, and the generation of coaching in the vicinity of the tip of the inner cylinder can be prevented.

前記燃焼ガス抽気プローブにおいて、前記内筒の下半周の先端を、該下半周の先端を上にして、該プローブの取付部と上下方向に重なり合うように構成することができる。これにより、内筒の先端部等に生成されたコーチングが内筒と該プローブの取付部との間に落下することを防止することができる。   In the combustion gas extraction probe, the tip of the lower half circumference of the inner cylinder may be configured to overlap the probe mounting portion in the vertical direction with the tip of the lower half circumference up. Thereby, it can prevent that the coaching produced | generated by the front-end | tip part of the inner cylinder falls between an inner cylinder and the attachment part of this probe.

前記燃焼ガス抽気プローブにおいて、前記リング状の板状部材を、前記外筒の先端部の内周面に固定される補強部材を介して固定することができ、簡易な構成にて外筒に対してリング状の板状部材を強固に保持するとともに、外筒先端部の垂れ下がりを防止することができる。   In the combustion gas extraction probe, the ring-shaped plate-like member can be fixed via a reinforcing member fixed to the inner peripheral surface of the distal end portion of the outer cylinder. As a result, the ring-shaped plate-like member can be firmly held and the drooping of the outer cylinder tip can be prevented.

前記燃焼ガス抽気プローブにおいて、前記低温ガスとして、該プローブの周囲から取り入れた空気、又は悪臭を含む換気空気を用いることができる。   In the combustion gas extraction probe, air taken from around the probe or ventilation air containing bad odor can be used as the low temperature gas.

以上のように、本発明にかかる燃焼ガス抽気プローブによれば、プローブの寿命を延長させ、塩素バイパスシステム等の安定運転を確保することが可能となる。   As described above, according to the combustion gas extraction probe of the present invention, it is possible to extend the life of the probe and ensure stable operation of the chlorine bypass system or the like.

次に、本発明の実施の形態について、図面を参照しながら詳細に説明する。   Next, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明にかかる燃焼ガス抽気プローブ（以下、「プローブ」と略称する）の一実施の形態を示し、このプローブ１は、円筒状の内筒２と、内筒２を囲繞する円筒状の外筒３と、外筒３の先端部に固定された、リング状の板状部材としての鏡板６と、内筒２と外筒３との間に形成された冷却空気通路８と、冷却ファン（不図示）からの冷却空気を冷却空気通路８に供給する冷却空気入口部（不図示）等を備え、セメントキルンの立上り部５に取付座４を介して設置される。   FIG. 1 shows an embodiment of a combustion gas extraction probe (hereinafter abbreviated as “probe”) according to the present invention. This probe 1 includes a cylindrical inner cylinder 2 and a cylinder surrounding the inner cylinder 2. A cylindrical outer cylinder 3, an end plate 6 as a ring-shaped plate member fixed to the tip of the outer cylinder 3, a cooling air passage 8 formed between the inner cylinder 2 and the outer cylinder 3, A cooling air inlet (not shown) for supplying cooling air from a cooling fan (not shown) to the cooling air passage 8 is provided, and is installed on the rising part 5 of the cement kiln via the mounting seat 4.

内筒２は、立上り部５を流れる高温の燃焼ガスを、吐出口２ｃから導入された冷却空気によって冷却しながら矢印Ｓ方向に抽気するために備えられる。この内筒２は、円筒状に形成され、燃焼ガスの入口部２ａは、セメントキルンの立上り部５の燃焼ガス流路に面し、出口部２ｂは、後段の抽気ガス処理設備に接続される。吐出口２ｃは、内筒２の相対向する位置に２つ設けられる。   The inner cylinder 2 is provided for extracting the high-temperature combustion gas flowing through the rising portion 5 in the direction of arrow S while being cooled by the cooling air introduced from the discharge port 2c. The inner cylinder 2 is formed in a cylindrical shape, the combustion gas inlet portion 2a faces the combustion gas flow path of the rising portion 5 of the cement kiln, and the outlet portion 2b is connected to a subsequent extraction gas processing facility. . Two discharge ports 2c are provided at opposite positions of the inner cylinder 2.

図２に示すように、内筒２の上半周の先端２ｄは、鏡板６との間に隙間Ｃを有し、冷却空気通路８内を矢印方向に流れる冷却空気が、隙間Ｃより矢印Ｄ方向に吹き込まれることによって、立上り部５の内側に蓄積されるコーチングを除去することができる。   As shown in FIG. 2, the upper end 2 d of the upper half circumference of the inner cylinder 2 has a gap C between the end plate 6, and the cooling air flowing in the direction of the arrow in the cooling air passage 8 flows from the gap C in the direction of the arrow D. As a result, the coaching accumulated inside the rising portion 5 can be removed.

一方、内筒２の下半周の先端２ｅは、図３に示すように、この先端２ｅを上にして、取付座４の縁部４ａと上下方向に重なり合うように構成され、これにより、立上り部５や、内筒２の先端部に生成されたコーチングが内筒２と取付座４との間に落下することを防止することができる。   On the other hand, the tip 2e of the lower half circumference of the inner cylinder 2 is configured to overlap the edge 4a of the mounting seat 4 in the vertical direction with the tip 2e facing upward as shown in FIG. 5 and the coaching produced | generated at the front-end | tip part of the inner cylinder 2 can prevent falling between the inner cylinder 2 and the attachment seat 4. FIG.

図１に示すように、外筒３は、内筒２を囲繞するように、断面が内筒２と同心円状の円筒状に形成される。この外筒３は、フランジ部３ａを介して取付座４に固定される。外筒３の内面と、内筒２の外面との間には、冷却空気通路８が形成され、この冷却空気通路８に、図示しない冷却空気入口部を介して外部から冷却空気が供給され、吐出口２ｃを介して内筒２の内部に導入される。   As shown in FIG. 1, the outer cylinder 3 is formed in a cylindrical shape whose section is concentric with the inner cylinder 2 so as to surround the inner cylinder 2. The outer cylinder 3 is fixed to the mounting seat 4 via the flange portion 3a. A cooling air passage 8 is formed between the inner surface of the outer cylinder 3 and the outer surface of the inner cylinder 2, and cooling air is supplied to the cooling air passage 8 from outside via a cooling air inlet portion (not shown). It is introduced into the inner cylinder 2 through the discharge port 2c.

鏡板６は、内筒２と外筒３の両先端部の開口部を覆うようにリング状に形成される。但し、図２及び図３に示したように、開口部全体を覆うのではなく、内筒２との間には隙間が形成される。この鏡板６と外筒３との間には、補強部材としての補強リブ７が装着され、外筒３に対して鏡板６を強固に保持するとともに、外筒３の先端部の垂れ下がりを防止している。   The end plate 6 is formed in a ring shape so as to cover the openings at both end portions of the inner cylinder 2 and the outer cylinder 3. However, as shown in FIGS. 2 and 3, a gap is formed between the inner cylinder 2 rather than covering the entire opening. A reinforcing rib 7 as a reinforcing member is mounted between the end plate 6 and the outer cylinder 3 to firmly hold the end plate 6 with respect to the outer cylinder 3 and to prevent the tip of the outer cylinder 3 from hanging down. ing.

上記プローブ１を用いてセメントキルン内で発生した１０００℃程度のキルン排ガスの一部を抽気する際には、図示しない冷却ファン及び冷却空気入口部から冷却空気通路８に冷却空気が供給され、冷却空気は、冷却空気通路８を矢印方向に流れた後、吐出孔２ｃから内筒２内に導入され、高温の燃焼ガスと混合される。これによって、燃焼ガスは、プローブ１の出口ガス温度が４５０℃程度になるように急冷されながら矢印Ｓ方向に抽気される。   When a part of the kiln exhaust gas of about 1000 ° C. generated in the cement kiln is extracted using the probe 1, cooling air is supplied to the cooling air passage 8 from a cooling fan and a cooling air inlet portion (not shown) After flowing through the cooling air passage 8 in the direction of the arrow, the air is introduced into the inner cylinder 2 from the discharge hole 2c and mixed with high-temperature combustion gas. As a result, the combustion gas is extracted in the arrow S direction while being rapidly cooled so that the outlet gas temperature of the probe 1 is about 450 ° C.

ここで、内筒２の先端部は、高温雰囲気に曝されて熱膨張する一方、外筒３の先端部及び鏡板６の部分は、高温雰囲気に直接曝されることはなく、また、冷却空気通路８に冷却気体が流れるため熱膨張が少ない。その結果、図２に示すように、外筒３の先端部及び鏡板６に対して、内筒２の先端部が相対的にプローブ１の軸線方向（矢印Ｅ方向）に移動するが、内筒２の先端部と鏡板６とは一体化されず、隙間が設けられているため、内筒２の先端部と鏡板６との間に熱応力が発生することはなく、従来この熱応力により発生していた内筒２の先端部と鏡板６との間の亀裂、鏡板６の脱落等を回避することができる。   Here, while the tip of the inner cylinder 2 is exposed to a high temperature atmosphere and thermally expands, the tip of the outer cylinder 3 and the end plate 6 are not directly exposed to the high temperature atmosphere, and cooling air Since the cooling gas flows through the passage 8, thermal expansion is small. As a result, as shown in FIG. 2, the tip of the inner cylinder 2 moves relative to the tip of the outer cylinder 3 and the end plate 6 in the axial direction of the probe 1 (arrow E direction). 2 and the end plate 6 are not integrated with each other, and a gap is provided. Therefore, no thermal stress is generated between the end portion of the inner cylinder 2 and the end plate 6. It is possible to avoid cracks between the tip of the inner cylinder 2 and the end plate 6, dropout of the end plate 6, and the like.

尚、上記実施の形態においては、内筒２及び外筒３の先端部の開口部を覆う鏡板６を有するプローブ１について説明したが、鏡板６を備えずに、外筒３の先端部を内径が先端部に向かうにつれて漸減するような構成としたり、鏡板６を有していてもリング状ではなく、円錐台状に形成するなど、プローブ１の先端部の構成は種々変更可能であるが、いずれにしても、本発明においては、内筒２の先端部を外筒３の先端部等と一体化することなく、外筒３の先端部等に対して、プローブ１の軸線方向に相対移動可能としたことを特徴とする。   In the above-described embodiment, the probe 1 having the end plate 6 that covers the openings of the end portions of the inner cylinder 2 and the outer tube 3 has been described. The configuration of the tip portion of the probe 1 can be variously changed, such as a configuration in which the tip portion gradually decreases toward the tip portion, or even if it has the end plate 6, it is not in a ring shape but in a truncated cone shape. In any case, in the present invention, the distal end portion of the inner cylinder 2 is moved relative to the distal end portion of the outer cylinder 3 in the axial direction without being integrated with the distal end portion of the outer cylinder 3 or the like. It is possible to do this.

また、上記実施の形態においては、高温の燃焼ガスをプローブ１の周囲から取り入れた空気によって冷却する場合について説明したが、セメント焼成設備において廃棄物（例えば、都市ごみ焼却灰、下水汚泥、建設発生処理土等）を乾燥する際に発生する悪臭を含む換気空気等を冷却用ガスとして用いることもできる。   In the above embodiment, the case where the high-temperature combustion gas is cooled by the air taken from the periphery of the probe 1 has been described. However, waste (for example, municipal waste incineration ash, sewage sludge, construction generation) Ventilation air containing bad odor generated when drying the treated soil or the like) can also be used as the cooling gas.

さらに、内筒２や外筒３は、鉄板又は鋳鋼で製作することができるが、これらに限定されることなく、その他の金属等、高温に耐えることができ、加工性に優れる材料等を用いることもできる。また、鏡板６や補強リブ７についても鉄板等で製作することができるが、鉄板等に限定されることなく、他の材料を用いることもできる。   Furthermore, although the inner cylinder 2 and the outer cylinder 3 can be manufactured with an iron plate or cast steel, it is not limited thereto, and other materials such as other metals that can withstand high temperatures and have excellent workability are used. You can also. Further, the end plate 6 and the reinforcing rib 7 can also be made of an iron plate or the like, but other materials can be used without being limited to the iron plate or the like.

本発明にかかる燃焼ガス抽気プローブの一実施の形態を示す一部破断全体図である。It is a partially broken whole view showing one embodiment of a combustion gas extraction probe concerning the present invention. 図１のＡ部拡大図である。It is the A section enlarged view of FIG. 図１のＢ部拡大図である。It is the B section enlarged view of FIG.

符号の説明Explanation of symbols

１ 燃焼ガス抽気プローブ
２ 内筒
２ａ 入口部
２ｂ 出口部
２ｃ 吐出口
２ｄ 先端（上半周）
２ｅ 先端（下半周）
３ 外筒
３ａフランジ部
４ 取付座
４ａ縁部
５ 立上り部
６ 鏡板
７ 補強リブ
８ 冷却空気通路 DESCRIPTION OF SYMBOLS 1 Combustion gas extraction probe 2 Inner cylinder 2a Inlet part 2b Outlet part 2c Discharge port 2d Tip (upper half circumference)
2e Tip (lower half)
3 outer cylinder 3a flange part 4 mounting seat 4a edge part 5 rising part 6 end plate 7 reinforcing rib 8 cooling air passage

Claims (6)

内部を高温の燃焼ガスが流れる内筒と、
該内筒を囲繞し、該内筒との間に形成された通路を前記燃焼ガスより低温のガスが流れる外筒とを備え、
前記低温ガスによって冷却された前記燃焼ガスを抽気する燃焼ガス抽気プローブにおいて、
前記内筒の先端部と前記外筒の先端部とを一体化することなく、該内筒の先端部を、前記外筒の先端部に対して、該プローブの軸線方向に相対移動可能としたことを特徴とする燃焼ガス抽気プローブ。 An inner cylinder through which high-temperature combustion gas flows;
An outer cylinder that surrounds the inner cylinder and in which a gas having a temperature lower than the combustion gas flows in a passage formed between the inner cylinder and the inner cylinder;
In a combustion gas extraction probe for extracting the combustion gas cooled by the low temperature gas,
Without integrating the tip of the inner cylinder and the tip of the outer cylinder, the tip of the inner cylinder can be moved relative to the tip of the outer cylinder in the axial direction of the probe. Combustion gas extraction probe characterized by the above. 前記外筒の先端部に固定され、該外筒と前記内筒の両先端部で形成される開口部を覆うように配置されるリング状の板状部材を備え、
前記内筒の先端部と前記板状部材とを一体化することなく、該内筒の先端部を、前記板状部材に対して、前記プローブの軸線方向に相対移動可能としたことを特徴とする請求項１に記載の燃焼ガス抽気プローブ。 A ring-shaped plate-like member that is fixed to the distal end portion of the outer cylinder and is disposed so as to cover an opening formed by both the outer cylinder and the distal end portion of the inner cylinder;
The tip of the inner cylinder can be moved relative to the plate in the axial direction of the probe without integrating the tip of the inner cylinder and the plate-like member. The combustion gas extraction probe according to claim 1. 前記内筒の上半周の先端は、前記リング状の板状部材との間に、該プローブの長手方向に隙間を有することを特徴とする請求項２に記載の燃焼ガス抽気プローブ。   The combustion gas bleeder probe according to claim 2, wherein a gap in the longitudinal direction of the probe is provided between the tip of the upper half circumference of the inner cylinder and the ring-shaped plate member. 前記内筒の下半周の先端は、該下半周の先端を上にして、該プローブの取付部と上下方向に重なり合うことを特徴とする請求項１、２又は３に記載の燃焼ガス抽気プローブ。   4. The combustion gas bleeder probe according to claim 1, wherein the tip of the lower half circumference of the inner cylinder overlaps the mounting portion of the probe in the vertical direction with the tip of the lower half circumference up. 5. 前記リング状の板状部材は、前記外筒の先端部の内周面に固定される補強部材を介して支持されることを特徴とする請求項２、３又は４に記載の燃焼ガス抽気プローブ。   The combustion gas bleeder probe according to claim 2, 3 or 4, wherein the ring-shaped plate member is supported via a reinforcing member fixed to an inner peripheral surface of a distal end portion of the outer cylinder. . 前記低温ガスは、該プローブの周囲から取り入れた空気、又は悪臭を含む換気空気であることを特徴とする請求項１乃至５のいずれかに記載の燃焼ガス抽気プローブ。   The combustion gas bleeder probe according to any one of claims 1 to 5, wherein the low-temperature gas is air taken from around the probe or ventilation air containing a bad odor.
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