JPH11316016A - Exhaust gas dust removing device - Google Patents
Exhaust gas dust removing deviceInfo
- Publication number
- JPH11316016A JPH11316016A JP10121949A JP12194998A JPH11316016A JP H11316016 A JPH11316016 A JP H11316016A JP 10121949 A JP10121949 A JP 10121949A JP 12194998 A JP12194998 A JP 12194998A JP H11316016 A JPH11316016 A JP H11316016A
- Authority
- JP
- Japan
- Prior art keywords
- fly ash
- exhaust gas
- heat transfer
- air heater
- tube
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Chimneys And Flues (AREA)
- Air Supply (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、排ガス中に含まれ
ている飛灰を取り除くための排ガス除塵装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas dust removing apparatus for removing fly ash contained in exhaust gas.
【0002】[0002]
【従来の技術】焼却灰になる成分や腐蝕性成分を含むご
みを焼却したり、溶融するごみ焼却炉やごみ溶融炉、或
いは、石炭を燃料とする石炭焚きボイラなどは、廃熱回
収用の蒸気過熱管に腐蝕性成分を含む大量の灰が付着す
るため、金属製の蒸気過熱管の腐蝕が生じ易く、蒸気過
熱管の寿命が短い。2. Description of the Related Art Waste incinerators and waste melting furnaces that incinerate and melt waste containing components that become incinerated ash and corrosive components, and coal-fired boilers that use coal as fuel are used for waste heat recovery. Since a large amount of ash containing a corrosive component adheres to the steam heating tube, corrosion of the metal steam heating tube is likely to occur, and the life of the steam heating tube is short.
【0003】また、蒸気過熱管の外側に飛灰が付着する
ことによって回収熱エネルギが少なくなり、有効な廃熱
利用ができない。In addition, fly ash adheres to the outside of the steam superheater, so that the recovered heat energy is reduced, making it impossible to effectively use waste heat.
【0004】[0004]
【発明が解決しようとする課題】本発明は、係る問題を
解消するためになされたものであり、ごみ焼却炉、ごみ
溶融炉、石炭焚きボイラなどの廃熱回収用蒸気過熱管に
付着する飛灰の量を低減し得る排ガス除塵装置を提供す
ることを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has been developed in order to solve the problem. An object of the present invention is to provide an exhaust gas dust removing device capable of reducing the amount of ash.
【0005】[0005]
【課題を解決するための手段】請求項1に記載の発明に
係る排ガス除塵装置は、排ガスの廃熱を回収する廃熱回
収用の蒸気過熱器の上流側に、細長い飛灰捕捉部材を排
ガスの流れを横切る方向に一定の間隔で配設させてなる
飛灰捕捉部材群を1段以上配設させたことを特徴とす
る。According to the first aspect of the present invention, there is provided an exhaust gas dust removing apparatus comprising an elongated fly ash trapping member upstream of a waste heat recovery steam superheater for recovering waste heat of exhaust gas. Characterized in that one or more fly ash catching members arranged at a constant interval in a direction crossing the flow of air are arranged.
【0006】請求項1に記載の発明によれば、蒸気過熱
器の上流側に飛灰捕捉部材群を1段以上配設させている
ため、飛灰捕捉部材群を構成している多数の細長い飛灰
捕捉部材の前面に飛灰が付着し、蒸気過熱器の伝熱管に
付着する飛灰の量が少なくなる。請求項2に記載の発明
に係る排ガス除塵装置は、飛灰捕捉部材群を、空気加熱
器の伝熱管の上流側に1段以上配設させている。According to the first aspect of the present invention, the fly ash catching member group is arranged at one or more stages upstream of the steam superheater. Fly ash adheres to the front surface of the fly ash capturing member, and the amount of fly ash adhering to the heat transfer tube of the steam superheater is reduced. In the exhaust gas dust removing apparatus according to the second aspect of the present invention, the fly ash catching member group is disposed at one or more stages upstream of the heat transfer tube of the air heater.
【0007】請求項2に記載の発明によれば、飛灰捕捉
部材群を空気加熱器の伝熱管の上流側に1段以上配設さ
せているため、飛灰捕捉部材群を構成している多数の細
長い飛灰捕捉部材の前面に飛灰が付着し、蒸気過熱器の
伝熱管に付着する飛灰の量が少なくなる。請求項3に記
載の発明に係る排ガス除塵装置は、飛灰捕捉部材群を、
煙道内に1段以上配設させている。According to the second aspect of the present invention, the fly ash catching member group is constituted by disposing the fly ash catching member group at one or more stages upstream of the heat transfer tube of the air heater. Fly ash adheres to the front surfaces of the numerous elongated fly ash capturing members, and the amount of fly ash adhering to the heat transfer tubes of the steam superheater is reduced. The exhaust gas dust remover according to the third aspect of the present invention includes a fly ash capturing member group,
One or more steps are installed in the flue.
【0008】請求項3に記載の発明によれば、飛灰捕捉
部材群を、煙道内に1段以上配設させているため、飛灰
捕捉部材群を構成している多数の細長い飛灰捕捉部材の
前面に飛灰が付着し、蒸気過熱器の伝熱管に付着する飛
灰の量が少なくなる。請求項4に記載の発明に係る排ガ
ス除塵装置は、飛灰捕捉部材群を、集塵機のフィルタの
上流側に1段以上配設させている。According to the third aspect of the present invention, the fly ash catching member group is disposed at one or more stages in the flue, so that a large number of elongated fly ash catching members constituting the fly ash catching member group are provided. Fly ash adheres to the front surface of the member, and the amount of fly ash adhered to the heat transfer tube of the steam superheater is reduced. In the exhaust gas removing apparatus according to the fourth aspect of the present invention, the fly ash catching member group is arranged at one or more stages upstream of the filter of the dust collector.
【0009】請求項4に記載の発明によれば、飛灰捕捉
部材群を、集塵機のフィルタの上流側に1段以上配設さ
せているため、飛灰捕捉部材群を構成している多数の細
長い飛灰捕捉部材の前面に飛灰が付着し、蒸気過熱器の
伝熱管に付着する飛灰の量が少なくなる。請求項5に記
載の発明に係る排ガス除塵装置は、蒸気過熱器の蒸気過
熱用伝熱管の外側に多数の空気加熱用伝熱管をサークル
状に配設させている。According to the fourth aspect of the present invention, the fly ash catching member group is arranged at one or more stages upstream of the filter of the dust collector, so that a large number of fly ash catching member groups are formed. Fly ash adheres to the front surface of the elongated fly ash capturing member, and the amount of fly ash attached to the heat transfer tube of the steam superheater is reduced. In the exhaust gas dust removing apparatus according to the fifth aspect of the present invention, a large number of heat transfer tubes for air heating are arranged in a circle outside the heat transfer tubes for steam heating of the steam superheater.
【0010】請求項5に記載の発明によれば、蒸気過熱
器の蒸気過熱用伝熱管の外側に多数の空気加熱用伝熱管
をサークル状に配設させているため、飛灰が蒸気過熱用
伝熱管の外側を囲んでいる空気加熱用伝熱管に付着し、
蒸気過熱器の伝熱管に付着する飛灰の量が少なくなる。
請求項6に記載の発明に係る排ガス除塵装置は、空気加
熱用伝熱管が金属製であって、当該空気加熱用伝熱管の
外側をセラミックス製の保護材で被覆している。According to the fifth aspect of the present invention, since a large number of heat transfer tubes for air heating are arranged in a circle outside the heat transfer tubes for steam heating of the steam superheater, fly ash is used for steam heating. Attached to the heat transfer tube for air heating surrounding the outside of the heat transfer tube,
The amount of fly ash adhering to the heat transfer tubes of the steam superheater is reduced.
In the exhaust gas dust removing apparatus according to the sixth aspect of the present invention, the heat transfer tube for air heating is made of metal, and the outside of the heat transfer tube for air heating is covered with a protective material made of ceramics.
【0011】請求項6に記載の発明によれば、金属製の
空気加熱用伝熱管の腐食および摩耗を防ぐことができ
る。請求項7に記載の発明に係る排ガス除塵装置は、空
気加熱用伝熱管の表面温度を蒸気過熱管の表面温度以下
にしている。請求項7に記載の発明によれば、蒸気過熱
管への飛灰の付着および凝縮量を減少できる。According to the sixth aspect of the present invention, corrosion and wear of the metal air heat transfer tube can be prevented. According to the seventh aspect of the present invention, the surface temperature of the heat transfer tube for air heating is set to be equal to or lower than the surface temperature of the steam superheater tube. According to the seventh aspect of the invention, the amount of fly ash attached to the steam superheater and the amount of condensation can be reduced.
【0012】[0012]
【発明の実施の形態】以下、図面により本発明の実施の
形態を説明する。図1は、ごみ溶融炉の概略図であり、
予め、所定の大きさに粉砕されたごみaは、図示しない
2段ゲート式のごみ投入装置を通って横型回転ドラム式
の熱分解反応装置1に供給される。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a refuse melting furnace,
The refuse a previously crushed to a predetermined size is supplied to a horizontal rotary drum type pyrolysis reactor 1 through a two-stage gate type refuse charging device not shown.
【0013】熱分解反応装置1内は、空気加熱器2によ
って加熱された加熱空気bによって間接的に加熱されて
いるため、熱分解反応装置1内のごみaは、熱分解して
乾留ガスG1と熱分解残留物cになる。なお、熱分解反
応装置1内の圧力は、図示しない誘引送風機によって大
気圧以下に保たれている。熱分解反応装置1から排出装
置3内に排出された熱分解残留物cは、選別機4によっ
て燃焼性成分dと不燃焼性成分eとに選別され、不燃焼
性成分eは、図示しないコンテナに回収され、燃焼性成
分dは、配管L3を通って溶融炉5のバーナー6に供給
される。Since the inside of the thermal decomposition reactor 1 is indirectly heated by the heated air b heated by the air heater 2, the refuse a in the thermal cracking reactor 1 is thermally decomposed and carbonized gas G1 And thermal decomposition residue c. The pressure in the thermal decomposition reactor 1 is maintained at or below the atmospheric pressure by an unillustrated air blower. The pyrolysis residue c discharged from the pyrolysis reaction device 1 into the discharge device 3 is separated into a combustible component d and a non-combustible component e by a separator 4. The combustible component d is supplied to the burner 6 of the melting furnace 5 through the pipe L3.
【0014】バーナー6に供給された燃焼性成分dは、
排出装置3から配管L2を通って供給される高温(45
0℃程度)の乾留ガスG1と、送風機7から配管L4を
通って供給される燃焼用空気fと共に、1300℃程度
の高温域で燃焼され、このとき発生した灰分は、その燃
焼熱により溶融スラグgとなって溶融炉5の底部排出口
8から図示しない水槽に落下して冷却固化される。上記
灰分の溶融の際に、空気加熱器2、第1煙道9、集塵機
10、第2煙道11などで回収された灰hも供給され、
溶融される。The combustible component d supplied to the burner 6 is:
The high temperature (45) supplied from the discharge device 3 through the pipe L2
(About 0 ° C.) together with the combustion air f supplied from the blower 7 through the pipe L4 in a high temperature range of about 1300 ° C. The ash generated at this time is melted slag g and falls from the bottom outlet 8 of the melting furnace 5 into a water tank (not shown) to be cooled and solidified. When the ash is melted, ash h collected by the air heater 2, the first flue 9, the dust collector 10, the second flue 11, etc. is also supplied,
Is melted.
【0015】溶融炉5から通路12を通って排出された
高温(1250℃程度)の排ガスG2は、空気加熱器2
及び第1煙道9を経て集塵機10に導かれて除塵され、
更に、第2煙道11を経て蒸気過熱器13に導かれて廃
熱回収される。その後、図示しない集塵装置で除塵さ
れ、更に、排ガス浄化装置(図示せず)で有害成分が除
去された後、クリーンな排ガスになって煙突から大気中
に放出される。The high temperature (about 1250 ° C.) exhaust gas G 2 discharged from the melting furnace 5 through the passage 12 is supplied to the air heater 2.
And the dust is guided to the dust collector 10 through the first flue 9 and is removed.
Furthermore, the waste heat is guided to the steam superheater 13 through the second flue 11 and recovered. Thereafter, dust is removed by a dust collector (not shown), and further, harmful components are removed by an exhaust gas purifying device (not shown).
【0016】更に、各機器について具体的に説明する。 (イ)溶融炉 縦型の溶融炉5は、炉壁15に周方向の横溝16を多段
に設けているため、炉壁表面積が増加し、灰の溶融率が
向上する。なお、横溝16の代わりに螺旋溝を設けても
よい。また、炉壁表面積を増加させるため、溶融炉5の
炉壁15に、溶融炉5の中心軸(図示せず)の方向に向
けて多数の棒を取り付けてもよい。また、溶融炉5の中
心部に中空状の紡錘体を設置してもよい。また、所望に
より中空状の紡錘体の外表面に棒を多段、かつ、放射状
に設けてもよい。Further, each device will be specifically described. (A) Melting Furnace In the vertical melting furnace 5, the circumferential wall 16 is provided in multiple stages on the furnace wall 15, so that the furnace wall surface area increases and the ash melting rate improves. Note that a spiral groove may be provided instead of the lateral groove 16. Further, in order to increase the furnace wall surface area, a number of rods may be attached to the furnace wall 15 of the melting furnace 5 in the direction of the central axis (not shown) of the melting furnace 5. Further, a hollow spindle may be provided at the center of the melting furnace 5. If desired, bars may be provided in multiple stages and radially on the outer surface of the hollow spindle.
【0017】(ロ)空気加熱器 図1のように、燃焼排ガスG2は、縦型の空気加熱器2
の底部から空気加熱器2内に流入した後、空気加熱器2
の胴部18に接続している第1煙道9から流出するた
め、空気加熱器2は、図2に示すように、伝熱管19の
下方に飛灰捕捉部材群27が1段以上設けられている
(図示の場合は、2段)。(B) Air heater As shown in FIG. 1, the flue gas G2 is supplied to a vertical air heater 2
After flowing into the air heater 2 from the bottom of the air heater 2
As shown in FIG. 2, the air heater 2 is provided with one or more fly ash capturing member groups 27 below the heat transfer tube 19 because the air heater 2 flows out from the first flue 9 connected to the body portion 18 of the air heater 2. (In the illustrated case, two stages).
【0018】飛灰捕捉部材群27は、図3に示すよう
に、空気加熱器2の胴部18を横切る水平面(図示せ
ず)内に複数の円管形飛灰捕捉部材28を一定の間隔で
設けることにより形成されている。ただ、上段の飛灰捕
捉部材28は、空気加熱器2の伝熱管19に対峙するよ
うに設けられ、下段の飛灰捕捉部材28は、上段の飛灰
捕捉部材28に対して半ピッチだけ横方にずらして設け
られている。このため、図3に示すように、飛灰捕捉部
材28の下面に飛灰が付着し、その分、排ガスG2中に
含まれる飛灰の量が減少する。飛灰捕捉部材28に付着
した付着灰jは、定期検査時に清掃する。As shown in FIG. 3, the fly ash catching member group 27 includes a plurality of tubular fly ash catching members 28 at a predetermined interval in a horizontal plane (not shown) crossing the body 18 of the air heater 2. It is formed by providing in. However, the upper fly ash catching member 28 is provided so as to face the heat transfer tube 19 of the air heater 2, and the lower fly ash catching member 28 is laterally shifted by a half pitch with respect to the upper fly ash catching member 28. It is provided shifted. For this reason, as shown in FIG. 3, fly ash adheres to the lower surface of the fly ash catching member 28, and the amount of fly ash contained in the exhaust gas G2 decreases accordingly. The adhering ash j adhering to the fly ash capturing member 28 is cleaned at the time of the periodic inspection.
【0019】飛灰捕捉部材28は、円管のほか、例え
ば、角管、円柱、角柱、平板、円弧板などでもよい。要
は、飛灰を捕捉できる形状のものであればよい。ただ、
円管や角管の場合は、管内に空気を通すことができるた
め、空気加熱管として利用することもできる。また、飛
灰捕捉部材28は、耐熱性に富む繊維強化セラミックス
製のものが好ましい。The fly ash catching member 28 may be, for example, a square tube, a cylinder, a prism, a flat plate, an arc plate, or the like, in addition to a circular tube. In short, any shape can be used as long as it can catch fly ash. However,
In the case of a circular tube or a square tube, since air can be passed through the tube, it can be used as an air heating tube. Further, the fly ash capturing member 28 is preferably made of fiber reinforced ceramics having high heat resistance.
【0020】一方、空気加熱器2の伝熱管19は、図2
に示すように、2重構造になっており、繊維強化セラミ
ックス製の有底円筒状の外管20内に金属製の内管21
が設けられている。外管20は、隔壁板22に取り付け
られ、隔壁板22によって仕切られた加熱空気室23に
配管L1が接続している。一方、空気加熱器2の鏡板2
4に取り付けられた内管21に配管L0が接続してい
る。 (ハ)第1煙道 図1に示すように、空気加熱器2と集塵機10を連通さ
せている第1煙道9内に、飛灰捕捉部材群30が1段以
上設けられている(図示の場合は、3段)。On the other hand, the heat transfer tube 19 of the air heater 2 is shown in FIG.
As shown in the figure, a metal inner tube 21 is provided inside a bottomed cylindrical outer tube 20 made of fiber reinforced ceramics and has a double structure.
Is provided. The outer tube 20 is attached to a partition plate 22, and a pipe L <b> 1 is connected to a heated air chamber 23 partitioned by the partition plate 22. On the other hand, the end plate 2 of the air heater 2
The pipe L0 is connected to the inner pipe 21 attached to the pipe 4. (C) First flue As shown in FIG. 1, one or more fly ash capturing member groups 30 are provided in the first flue 9 that connects the air heater 2 and the dust collector 10 (illustration shown). In the case of, three steps).
【0021】図5に示すように、飛灰捕捉部材群30
は、それぞれ、第1煙道9を横切る垂直面(図示せず)
内に複数の角柱形飛灰捕捉部材31を一定の間隔で設け
ることにより形成されている。中段に位置する飛灰捕捉
部材31は、前段及び後段に位置する飛灰捕捉部材31
に対して半ピッチだけ横方にずれて設けられている。こ
のため、図5に示すように、飛灰捕捉部材31の前面に
飛灰が付着し、その分、排ガスG2中に含まれる飛灰の
量が減少する。As shown in FIG. 5, the fly ash catching member group 30
Are vertical planes (not shown) that respectively cross the first flue 9
It is formed by providing a plurality of prismatic fly ash capturing members 31 at regular intervals. The fly ash catching members 31 located in the middle stage are the fly ash catching members 31 located in the preceding and subsequent stages.
Are shifted laterally by a half pitch. For this reason, as shown in FIG. 5, fly ash adheres to the front surface of the fly ash capturing member 31, and the amount of fly ash contained in the exhaust gas G2 decreases accordingly.
【0022】飛灰捕捉部材31は、角柱のほか、例え
ば、角管、円柱、円管、平板、円弧板などでもよい。要
は、飛灰を捕捉できる形状のものであればよい。ただ、
円管や角管の場合は、管内に空気を通すことができるた
め、空気加熱管として利用することもできる。また、飛
灰捕捉部材31は、耐火レンガや耐熱性に富む繊維強化
セラミックス製のものが好ましい。The fly ash catching member 31 may be, for example, a square tube, a cylinder, a circular tube, a flat plate, an arc plate, or the like, in addition to the prism. In short, any shape can be used as long as it can catch fly ash. However,
In the case of a circular tube or a square tube, since air can be passed through the tube, it can be used as an air heating tube. Further, the fly ash capturing member 31 is preferably made of fire-resistant bricks or fiber-reinforced ceramics having high heat resistance.
【0023】図4に示すように、第1煙道9の床面33
に付着灰排出口34が設けられている。付着灰排出口3
4の幅は、飛灰捕捉部材31の幅と同じで良いが、その
長さは、飛灰捕捉部材31の前面に付着する飛灰の付着
量や付着灰を除去する清掃頻度などを勘案して設計す
る。As shown in FIG. 4, the floor surface 33 of the first flue 9
Is provided with an attached ash discharge port 34. Adhered ash outlet 3
The width of 4 may be the same as the width of the fly ash catching member 31, but its length takes into account the amount of fly ash attached to the front surface of the fly ash catching member 31 and the frequency of cleaning for removing the attached ash. Design.
【0024】付着灰排出口34は、通常、図示しないシ
ャッタによって遮蔽されている。飛灰捕捉部材31の前
面に付着している付着灰を除去する場合は、シャッタを
開け、第1煙道9をハンマリングしたり、或いは、第1
煙道9の天井部に設けたシャッター付きの開口部(図示
せず)から突き出した突き棒(図示せず)によって付着
灰jを突き崩して煙道直下の貯留室35に落下させる。The attached ash discharge port 34 is normally shielded by a shutter (not shown). When removing the attached ash adhering to the front surface of the fly ash catching member 31, the shutter is opened and the first flue 9 is hammered or the first flue 9 is hammered.
The attached ash j is crushed by a stick (not shown) projecting from an opening with a shutter (not shown) provided on the ceiling of the flue 9 and dropped into the storage chamber 35 immediately below the flue.
【0025】(ニ)集塵機 また、図1のように、縦型の集塵機10は、セラミック
ス製の有底円筒状フィルタ37の下方に飛灰捕捉部材群
38を1段配設させている。(D) Dust Collector As shown in FIG. 1, the vertical dust collector 10 has a single-stage fly ash catching member group 38 arranged below a bottomed cylindrical filter 37 made of ceramics.
【0026】飛灰捕捉部材群38は、図6に示すよう
に、集塵機10の胴部40を横切る水平面(図示せず)
内に複数の円管形飛灰捕捉部材39を一定の間隔、つま
り、フィルタ37に対峙するように設けることにより形
成されている。このため、図6に示すように、円管状の
飛灰捕捉部材39の下面に飛灰が付着し、その分、排ガ
スG2中に含まれる飛灰の量が減少することにより、ろ
過速度を速くでき、集塵器が小型化でき、安価な集塵器
が提供できる。飛灰捕捉部材39に付着した付着灰j
は、定期検査時に清掃する。As shown in FIG. 6, the fly ash catching member group 38 is a horizontal plane (not shown) crossing the body 40 of the dust collector 10.
It is formed by providing a plurality of tubular fly ash catching members 39 therein at a predetermined interval, that is, so as to face the filter 37. For this reason, as shown in FIG. 6, fly ash adheres to the lower surface of the tubular fly ash catching member 39, and the amount of fly ash contained in the exhaust gas G2 is reduced by that amount, thereby increasing the filtration speed. The dust collector can be reduced in size, and an inexpensive dust collector can be provided. Ash ash attached to the fly ash catching member 39
Shall be cleaned during periodic inspections.
【0027】飛灰捕捉部材39は、円管のほか、例え
ば、角管、円柱、角柱、平板、円弧板などでもよい。要
は、飛灰を捕捉できる形状のものであればよい。ただ、
円管や角管の場合は、管内に空気を通すことができるた
め、空気加熱管として利用することもできる。また、飛
灰捕捉部材39は、耐熱性に富む繊維強化セラミックス
製のものが好ましい。The fly ash catching member 39 may be, for example, a square tube, a cylinder, a prism, a flat plate, an arc plate, or the like, in addition to a circular tube. In short, any shape can be used as long as it can catch fly ash. However,
In the case of a circular tube or a square tube, since air can be passed through the tube, it can be used as an air heating tube. The fly ash catching member 39 is preferably made of fiber reinforced ceramics having high heat resistance.
【0028】(ホ)第2煙道 また、図1のように、集塵機10と蒸気加熱器13を連
通させている第2煙道11内に飛灰捕捉部材群42が1
段設けられている。従って、飛灰捕捉部材群42を構成
している飛灰捕捉部材43の前面に飛灰が付着し、その
分、排ガスG2中に含まれる飛灰の量が減少する。な
お、第2煙道11内に設けた飛灰捕捉部材群42は、第
1煙道9内に設けられている飛灰捕捉部材群30と同じ
構成であるから詳細な説明を省略することとする。(E) Second flue In addition, as shown in FIG. 1, a fly ash catching member group 42 is provided in the second flue 11 which connects the dust collector 10 and the steam heater 13.
There are steps. Therefore, fly ash adheres to the front surface of the fly ash catching member 43 constituting the fly ash catching member group 42, and the amount of fly ash contained in the exhaust gas G2 decreases accordingly. Note that the fly ash catching member group 42 provided in the second flue 11 has the same configuration as the fly ash catching member group 30 provided in the first flue 9, and therefore detailed description is omitted. I do.
【0029】(ヘ)蒸気過熱器 図1に示すように、蒸気過熱器13は、縦型の蒸気過熱
器本体45内に蒸気過熱管群54を備えている。(F) Steam superheater As shown in FIG. 1, the steam superheater 13 has a steam superheater tube group 54 in a vertical steam superheater body 45.
【0030】蒸気過熱器13は、図7のように、蒸気過
熱管群54の外側に多数の空気加熱用伝熱管55をサー
クル状に配設している。空気加熱用伝熱管55は、図8
及び図9に示すように、二重構造になっており、繊維強
化セラミックス製の有底円筒状の外管56内に金属製の
内管57が設けられ、内管57から供給された空気A
は、矢印のように、内管57と外管56との間を通過す
る間に加熱されるようになっている。蒸気過熱管群54
の外側の空気加熱用伝熱管55の外管56に飛灰が付着
するため、金属製の蒸気過熱管46への飛灰の付着量が
少なくなる。As shown in FIG. 7, the steam superheater 13 has a large number of heat transfer tubes 55 for air heating arranged in a circle outside the steam superheater tube group 54. The heat transfer tube 55 for air heating is shown in FIG.
As shown in FIG. 9, a double-layered structure is provided. A metal inner tube 57 is provided in a bottomed cylindrical outer tube 56 made of fiber reinforced ceramics, and air A supplied from the inner tube 57 is provided.
Is heated while passing between the inner tube 57 and the outer tube 56 as shown by the arrow. Steam superheated tube group 54
The fly ash adheres to the outer tube 56 of the air-heating heat transfer tube 55 outside the air heater, so that the amount of fly ash adhered to the metal steam superheater tube 46 is reduced.
【0031】金属製の外管を使用する場合せは、図8に
示すように、外管56は、排ガスに対向する側に円弧状
の保護材58を貼着し、飛灰の空気加熱用伝熱管への付
着を防ぎ、金属製外管56の腐食および摩耗を防いでい
る。保護材58に飛灰が付着するため、空気加熱用伝熱
管55および蒸気過熱管46に付着する飛灰の量が少な
くなる。保護材58に付着した付着灰jは、定期検査時
に清掃する。接着剤としては、ポリカルボシランやポリ
チタノカルボシランなどのセラミック接着剤が好まし
い。When a metal outer tube is used, as shown in FIG. 8, the outer tube 56 has an arc-shaped protective material 58 adhered to the side facing the exhaust gas, and is used for heating the fly ash for air heating. Adhesion to the heat transfer tube is prevented, and corrosion and wear of the metal outer tube 56 are prevented. Since fly ash adheres to the protection material 58, the amount of fly ash adhered to the heat transfer tube 55 for air heating and the steam superheater tube 46 is reduced. The ash j adhering to the protection member 58 is cleaned at the time of the periodic inspection. As the adhesive, a ceramic adhesive such as polycarbosilane or polytitanocarbosilane is preferable.
【0032】空気加熱用伝熱管55の表面温度を蒸気過
熱管46の表面温度以下にすることにより、蒸気過熱管
表面への飛灰の凝縮を防ぐことができる。図1に示すよ
うに、配管L5から空気加熱用伝熱管55の内管57内
へ空気を流し、外管55と内管57の間隙を通って加熱
された空気は、配管L6を通って配管L4へ送風され、
燃焼用空気の一部として利用される。By making the surface temperature of the heat transfer tube 55 for air heating equal to or lower than the surface temperature of the steam superheater tube 46, it is possible to prevent fly ash from condensing on the surface of the steam superheater tube. As shown in FIG. 1, air flows from the pipe L5 into the inner pipe 57 of the air heating heat transfer pipe 55, and the air heated through the gap between the outer pipe 55 and the inner pipe 57 passes through the pipe L6. It is blown to L4,
Used as part of the combustion air.
【0033】空気加熱用伝熱管の内管57に流れる空気
の流量を配管L5に設置されたバルブV1,V2で調節
して空気加熱用伝熱管の外管の表面温度を蒸気過熱管の
表面温度以下にすることにより、蒸気過熱管表面への飛
灰の凝縮を防ぐことができる。上記の飛灰捕捉部材群
は、ごみ溶融炉のみだけではなく、ごみ焼却炉や石炭焚
きボイラなどに適用することができる。The flow rate of the air flowing through the inner tube 57 of the air heating tube is adjusted by the valves V1 and V2 installed in the pipe L5 to adjust the surface temperature of the outer tube of the air heating tube to the surface temperature of the steam heating tube. By doing so, it is possible to prevent fly ash from condensing on the surface of the steam superheater. The above fly ash capturing member group can be applied not only to a refuse melting furnace but also to a refuse incinerator and a coal-fired boiler.
【0034】[0034]
【発明の効果】上記のように、請求項1に記載の発明に
よれば、蒸気過熱器の上流側に飛灰捕捉部材群を1段以
上配設させているため、飛灰捕捉部材群を構成している
多数の細長い飛灰捕捉部材の前面に飛灰が付着し、蒸気
過熱器の伝熱管に付着する飛灰の量が少なくなる。As described above, according to the first aspect of the present invention, the fly ash catching member group is disposed at one or more stages upstream of the steam superheater. Fly ash adheres to the front surfaces of a large number of elongated fly ash capturing members, and the amount of fly ash adhering to the heat transfer tube of the steam superheater is reduced.
【0035】また、請求項2に記載の発明によれば、飛
灰捕捉部材群を空気加熱器の伝熱管の上流側に1段以上
配設させているため、飛灰捕捉部材群を構成している多
数の細長い飛灰捕捉部材の前面に飛灰が付着し、蒸気過
熱器の伝熱管に付着する飛灰の量が少なくなる。また、
請求項3に記載の発明によれば、飛灰捕捉部材群を、煙
道内に1段以上配設させているため、飛灰捕捉部材群を
構成している多数の細長い飛灰捕捉部材の前面に飛灰が
付着し、蒸気過熱器の伝熱管に付着する飛灰の量が少な
くなる。According to the second aspect of the present invention, the fly ash catching member group is provided at one or more stages upstream of the heat transfer tube of the air heater. Fly ash adheres to the front surface of a large number of elongated fly ash capturing members, and the amount of fly ash adhering to the heat transfer tube of the steam superheater is reduced. Also,
According to the third aspect of the present invention, since the fly ash catching member group is disposed in one or more stages in the flue, the front surfaces of a large number of elongated fly ash catching members constituting the fly ash catching member group. Fly ash adheres to the heat transfer tube of the steam superheater, and the amount of fly ash attached to the heat transfer tube of the steam superheater decreases.
【0036】また、請求項4に記載の発明によれば、飛
灰捕捉部材群を、集塵機のフィルタの上流側に1段以上
配設させているため、飛灰捕捉部材群を構成している多
数の細長い飛灰捕捉部材の前面に飛灰が付着し、蒸気過
熱器の伝熱管に付着する飛灰の量が少なくなる。According to the fourth aspect of the present invention, the fly ash catching member group is provided at one or more stages upstream of the filter of the dust collector. Fly ash adheres to the front surfaces of the numerous elongated fly ash capturing members, and the amount of fly ash adhering to the heat transfer tubes of the steam superheater is reduced.
【0037】また、請求項5に記載の発明によれば、蒸
気過熱器の蒸気過熱用伝熱管の外側に多数の空気加熱用
伝熱管をサークル状に配設させているため、飛灰が蒸気
過熱用伝熱管の外側を囲んでいる空気加熱用伝熱管に付
着し、蒸気過熱器の伝熱管に付着する飛灰の量が少なく
なる。According to the fifth aspect of the present invention, since a large number of heat transfer tubes for air heating are arranged in a circle outside the heat transfer tubes for steam heating of the steam superheater, fly ash is generated. The amount of fly ash that adheres to the heat transfer tube for air heating surrounding the outside of the heat transfer tube for superheating and adheres to the heat transfer tube of the steam superheater is reduced.
【0038】また、請求項6に記載の発明によれば、空
気加熱用金属製伝熱管の腐食および摩耗を防ぐことがで
きる。また、請求項7に記載の発明によれば、蒸気過熱
管への飛灰の付着量および凝縮量を減少できる。According to the invention of claim 6, corrosion and wear of the metal heat transfer tube for air heating can be prevented. According to the seventh aspect of the present invention, the amount of fly ash attached to the steam superheater and the amount of condensation can be reduced.
【図1】ごみ溶融炉の概略図である。FIG. 1 is a schematic view of a refuse melting furnace.
【図2】空気加熱器の断面図である。FIG. 2 is a sectional view of an air heater.
【図3】図2のIII −III 断面図である。FIG. 3 is a sectional view taken along the line III-III of FIG. 2;
【図4】第1煙道の断面図である。FIG. 4 is a sectional view of a first flue.
【図5】図4のV−V断面図である。FIG. 5 is a sectional view taken along line VV of FIG. 4;
【図6】集塵機の要部拡大断面図である。FIG. 6 is an enlarged sectional view of a main part of the dust collector.
【図7】蒸気過熱器の横断面図である。FIG. 7 is a cross-sectional view of a steam superheater.
【図8】蒸気過熱器の空気加熱用伝熱管の横断面図であ
る。FIG. 8 is a cross-sectional view of a heat transfer tube for air heating of a steam superheater.
【図9】蒸気過熱器の空気加熱用伝熱管の横断面図であ
る。FIG. 9 is a cross-sectional view of a heat transfer tube for air heating of a steam superheater.
G2 排ガス 13 廃熱回収用の蒸気過熱器 27,30,38,42 飛灰捕捉部材群 28,31,39,43 細長い飛灰捕捉部材 G2 Exhaust gas 13 Steam superheater for waste heat recovery 27, 30, 38, 42 Fly ash capturing member group 28, 31, 39, 43 Slender fly ash capturing member
Claims (7)
気過熱器の上流側に、細長い飛灰捕捉部材を排ガスの流
れを横切る方向に一定の間隔で配設させてなる飛灰捕捉
部材群を1段以上配設させたことを特徴とする排ガス除
塵装置。1. A fly ash catcher comprising elongated fly ash catchers arranged at regular intervals in a direction transverse to the flow of exhaust gas upstream of a steam superheater for recovering waste heat of exhaust gas. An exhaust gas dedusting device, wherein a member group is arranged in one or more stages.
の上流側に1段以上配設させた請求項1記載の排ガス除
塵装置。2. The exhaust gas dust removing apparatus according to claim 1, wherein the fly ash catching member group is disposed at one or more stages upstream of the heat transfer tube of the air heater.
設させた請求項1記載の排ガス除塵装置。3. The exhaust gas dust removal apparatus according to claim 1, wherein the fly ash capturing member group is disposed in one or more stages in the flue.
上流側に1段以上配設させた請求項1記載の排ガス除塵
装置。4. The exhaust gas dust removing apparatus according to claim 1, wherein the fly ash capturing member group is arranged at one or more stages upstream of the filter of the dust collector.
多数の空気加熱用伝熱管をサークル状に配設させた請求
項1記載の排ガス除塵装置。5. The exhaust gas dust removing apparatus according to claim 1, wherein a number of heat transfer tubes for air heating are arranged in a circle outside the heat transfer tubes for steam heating of the steam superheater.
空気加熱用伝熱管の外側をセラミックス製の保護材で被
覆する請求項5記載の排ガス除塵装置。6. The exhaust gas dust removing apparatus according to claim 5, wherein the heat transfer tube for air heating is made of metal, and the outside of the heat transfer tube for air heating is covered with a protective material made of ceramics.
管の表面温度以下にする請求項5または6記載の排ガス
除塵装置。7. The exhaust gas removing apparatus according to claim 5, wherein the surface temperature of the heat transfer tube for air heating is set to be equal to or lower than the surface temperature of the steam superheater tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10121949A JPH11316016A (en) | 1998-05-01 | 1998-05-01 | Exhaust gas dust removing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10121949A JPH11316016A (en) | 1998-05-01 | 1998-05-01 | Exhaust gas dust removing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11316016A true JPH11316016A (en) | 1999-11-16 |
Family
ID=14823916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10121949A Pending JPH11316016A (en) | 1998-05-01 | 1998-05-01 | Exhaust gas dust removing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11316016A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013535647A (en) * | 2010-07-28 | 2013-09-12 | マーティン ゲーエムベーハー フュール ウムヴェルト ウント エネルギテクニック | Method for protecting heat exchange pipe of steam boiler equipment, molded product, heat exchange pipe and steam boiler equipment |
Citations (6)
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---|---|---|---|---|
JPS62106615U (en) * | 1985-12-25 | 1987-07-08 | ||
JPS63111921U (en) * | 1987-01-09 | 1988-07-19 | ||
JPH04214104A (en) * | 1990-01-08 | 1992-08-05 | Babcock & Wilcox Co:The | Internal type shock type particle separator for circulating fluidized bed type combustion apparatus |
JPH0894051A (en) * | 1994-07-25 | 1996-04-12 | Mitsui Eng & Shipbuild Co Ltd | High-temperature corrosion resistant air heater |
JPH08155335A (en) * | 1994-12-06 | 1996-06-18 | Ishikawajima Harima Heavy Ind Co Ltd | Electrostatic precipitator |
JPH1026010A (en) * | 1996-07-10 | 1998-01-27 | Takuma Co Ltd | High efficiency power generating method, exhaust gas treating method and exhaust gas treating device in waste treatment plant |
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1998
- 1998-05-01 JP JP10121949A patent/JPH11316016A/en active Pending
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS62106615U (en) * | 1985-12-25 | 1987-07-08 | ||
JPS63111921U (en) * | 1987-01-09 | 1988-07-19 | ||
JPH04214104A (en) * | 1990-01-08 | 1992-08-05 | Babcock & Wilcox Co:The | Internal type shock type particle separator for circulating fluidized bed type combustion apparatus |
JPH0894051A (en) * | 1994-07-25 | 1996-04-12 | Mitsui Eng & Shipbuild Co Ltd | High-temperature corrosion resistant air heater |
JPH08155335A (en) * | 1994-12-06 | 1996-06-18 | Ishikawajima Harima Heavy Ind Co Ltd | Electrostatic precipitator |
JPH1026010A (en) * | 1996-07-10 | 1998-01-27 | Takuma Co Ltd | High efficiency power generating method, exhaust gas treating method and exhaust gas treating device in waste treatment plant |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2013535647A (en) * | 2010-07-28 | 2013-09-12 | マーティン ゲーエムベーハー フュール ウムヴェルト ウント エネルギテクニック | Method for protecting heat exchange pipe of steam boiler equipment, molded product, heat exchange pipe and steam boiler equipment |
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