JP2002095919A - Clogging preventing device of denitration apparatus - Google Patents
Clogging preventing device of denitration apparatusInfo
- Publication number
- JP2002095919A JP2002095919A JP2000287186A JP2000287186A JP2002095919A JP 2002095919 A JP2002095919 A JP 2002095919A JP 2000287186 A JP2000287186 A JP 2000287186A JP 2000287186 A JP2000287186 A JP 2000287186A JP 2002095919 A JP2002095919 A JP 2002095919A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- filter
- denitration
- injection nozzle
- soot
- 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
- 239000004071 soot Substances 0.000 claims abstract description 31
- 239000003054 catalyst Substances 0.000 claims abstract description 25
- 238000007664 blowing Methods 0.000 claims abstract description 24
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims description 98
- 238000002347 injection Methods 0.000 claims description 35
- 239000007924 injection Substances 0.000 claims description 35
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 26
- 229910021529 ammonia Inorganic materials 0.000 claims description 13
- 230000002265 prevention Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 5
- 230000008021 deposition Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000006396 nitration reaction Methods 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 101000777301 Homo sapiens Uteroglobin Proteins 0.000 description 1
- 102000003729 Neprilysin Human genes 0.000 description 1
- 108090000028 Neprilysin Proteins 0.000 description 1
- 101100386054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CYS3 gene Proteins 0.000 description 1
- 102100031083 Uteroglobin Human genes 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 101150035983 str1 gene Proteins 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、脱硝装置の目詰り
防止装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing clogging of a denitration device.
【０００２】[0002]
【従来の技術】図４はボイラにおける従来の脱硝装置の
一例を表わすものであって、該脱硝装置は、ボイラから
排出される排ガスが流通するダクト１途中に、アンモニ
ア（ＮＨ3）を注入するアンモニア注入ノズル２を配設
すると共に、該アンモニア注入ノズル２より下流側に、
内部に脱硝触媒が充填された脱硝反応器３を設けてなる
構成を有しており、前記アンモニア注入ノズル２からダ
クト１内にアンモニアを注入し、ボイラから排出される
排ガス中に含まれるＮＯxを脱硝反応器３内の脱硝触媒
によって2. Description of the Related Art FIG. 4 shows an example of a conventional denitration device in a boiler. The denitration device injects ammonia (NH 3 ) into a duct 1 through which exhaust gas discharged from the boiler flows. Along with disposing the ammonia injection nozzle 2, downstream of the ammonia injection nozzle 2,
It has a configuration in which a denitration reactor 3 filled with a denitration catalyst is provided, and ammonia is injected into the duct 1 from the ammonia injection nozzle 2 to remove NOx contained in exhaust gas discharged from the boiler. By the denitration catalyst in the denitration reactor 3
【化１】ＮＯ＋ＮＨ3→Ｎ2＋Ｈ2Ｏ といった反応式で示される如く還元することにより、脱
硝を行い、排ガス中のＮＯxを低減するようになってい
る。## STR1 ## DeNOx is carried out by reducing as shown by a reaction formula of NO + NH 3 → N 2 + H 2 O, and NOx in exhaust gas is reduced.
【０００３】尚、図中、４は脱硝反応器３を通過した排
ガスとボイラのバーナへ供給される燃焼用空気とを熱交
換させるための空気予熱器、５は空気予熱器４を通過し
た排ガス中に含まれる煤塵を捕集するための集塵装置で
あり、ボイラから排出され前述の如く脱硝反応器３でＮ
Ｏxが除去された排ガスは、空気予熱器４でボイラのバ
ーナへ供給される燃焼用空気と熱交換され、集塵装置５
で煤塵が捕集され、図示していない脱硫装置で硫黄酸化
物が除去された後、煙突から大気中へ放出されるように
なっている。In FIG. 1, reference numeral 4 denotes an air preheater for exchanging heat between the exhaust gas passing through the denitration reactor 3 and combustion air supplied to the burner of the boiler, and reference numeral 5 denotes exhaust gas passing through the air preheater 4. This is a dust collecting device for collecting dust and dust contained therein. The dust is discharged from the boiler and is discharged from the denitration reactor 3 as described above.
The exhaust gas from which Ox has been removed is heat-exchanged with the combustion air supplied to the burner of the boiler in the air preheater 4, and the dust is collected in the dust collector 5
Then, after the dust is collected, sulfur oxides are removed by a desulfurization device (not shown), the dust is released from the stack into the atmosphere.
【０００４】[0004]
【発明が解決しようとする課題】ところで、ボイラを定
期点検後に再起動した場合、特に水洗を行わないボイラ
では、ボイラ内に残った煤塵が飛散し、脱硝反応器３内
に充填された脱硝触媒の上に堆積し、該脱硝触媒が目詰
りを起こす虞がある。By the way, when the boiler is restarted after the periodic inspection, the dust remaining in the boiler is scattered, especially in the boiler which is not washed with water, and the denitration catalyst filled in the denitration reactor 3 is used. And the denitration catalyst may be clogged.
【０００５】このため、従来においては、脱硝反応器３
の脱硝触媒の入側にスートブロワを設け、脱硝触媒の上
に堆積した煤塵を吹き飛ばすことが行われていた。For this reason, conventionally, the denitration reactor 3
A soot blower is provided on the inlet side of the denitration catalyst to blow off dust accumulated on the denitration catalyst.
【０００６】しかしながら、前述の如く、脱硝触媒の上
に堆積した煤塵を単に吹き飛ばすだけでは、比較的粒径
の大きな煤塵は下流側へ流れずに脱硝触媒の上に再堆積
し、結局は脱硝触媒が目詰りを起こしてしまい、清掃を
頻繁に行う必要が生じてその都度ボイラの運転を停止し
なければならず、又、脱硝触媒の目詰りによる抵抗の増
加により燃焼用空気を圧送する押込通風機の動力費も嵩
むという不具合を有していた。However, as described above, if the dust accumulated on the denitration catalyst is simply blown off, the dust having a relatively large particle size does not flow to the downstream side and is re-deposited on the denitration catalyst. The clogging causes clogging, necessitating frequent cleaning, and the boiler must be stopped each time.In addition, the forced draft that feeds combustion air due to increased resistance due to clogging of the denitration catalyst There was a problem that the power cost of the machine also increased.
【０００７】本発明は、斯かる実情に鑑み、脱硝反応器
内に充填された脱硝触媒に対する煤塵の堆積を防ぎ、脱
硝触媒の目詰りを防止し得、清掃間隔を延長してボイラ
連続運転時間を延長し得、燃焼用空気を圧送する押込通
風機の動力費低減をも図り得る脱硝装置の目詰り防止装
置を提供しようとするものである。The present invention has been made in view of the above circumstances, and can prevent the accumulation of dust on a denitration catalyst filled in a denitration reactor, prevent clogging of the denitration catalyst, extend the cleaning interval, and increase the continuous operation time of the boiler. It is an object of the present invention to provide a device for preventing clogging of a denitration device, which can extend the pressure and reduce the power cost of a forced draft fan for feeding combustion air.
【０００８】[0008]
【課題を解決するための手段】本発明は、ボイラから排
出される排ガスが流通するダクト途中に、アンモニアを
注入するアンモニア注入ノズルを配設すると共に、該ア
ンモニア注入ノズルより下流側に、内部に脱硝触媒が充
填された脱硝反応器を設けてなる脱硝装置の目詰り防止
装置であって、脱硝反応器の入側に、排ガス中に含まれ
る煤塵を捕集するためのフィルタを設けると共に、該フ
ィルタ下流側から上流側へ向け煤吹媒体を噴射してフィ
ルタに捕集された煤塵を吹き飛ばすための噴射ノズル
と、該噴射ノズルから噴射される煤吹媒体によって吹き
飛ばされた煤塵を吸引するための煤塵吸引機とを配設し
たことを特徴とする脱硝装置の目詰り防止装置にかかる
ものである。SUMMARY OF THE INVENTION According to the present invention, an ammonia injection nozzle for injecting ammonia is provided in the middle of a duct through which exhaust gas discharged from a boiler flows, and an ammonia injection nozzle is provided downstream of the ammonia injection nozzle. What is claimed is: 1.A device for preventing clogging of a denitration device comprising a denitration reactor filled with a denitration catalyst, wherein a filter for trapping dust contained in exhaust gas is provided on the input side of the denitration reactor, An injection nozzle for injecting the soot blowing medium from the filter downstream side to the upstream side to blow off the soot collected by the filter, and for sucking the soot dust blown off by the soot blowing medium injected from the injecting nozzle; The present invention relates to a device for preventing clogging of a denitration device, which is provided with a dust suction device.
【０００９】前記脱硝装置の目詰り防止装置において
は、フィルタを挟んで噴射ノズルと対向するように配設
された集塵コーンと、該集塵コーンと脱硝反応器の下流
側に設けられる集塵装置入側のダクトとを接続する煤塵
吸引配管と、該煤塵吸引配管途中に設けられ、噴射ノズ
ルからの煤吹媒体噴射時に連動して開操作される遮断弁
とによって煤塵吸引機を構成することができる。[0009] In the clogging prevention device of the denitration device, a dust collection cone disposed to face the injection nozzle with a filter interposed therebetween, and a dust collection cone provided downstream of the dust collection cone and the denitration reactor. A dust suction pipe is configured by a dust suction pipe connecting a duct on an apparatus entrance side, and a shutoff valve provided in the middle of the dust suction pipe and opened in conjunction with soot blowing medium injection from an injection nozzle. Can be.
【００１０】又、噴射ノズルと集塵コーンとを対向させ
た状態でフィルタに沿って移動させる移動装置を備える
ようにすることもできる。Further, a moving device for moving the spray nozzle and the dust collecting cone along the filter in a state where they are opposed to each other may be provided.
【００１１】上記手段によれば、以下のような作用が得
られる。According to the above means, the following effects can be obtained.
【００１２】ボイラを定期点検後に再起動した場合、特
に水洗を行わないボイラでは、ボイラ内に残った煤塵が
飛散するが、該煤塵は、フィルタによって捕集され、該
フィルタに捕集された煤塵は、該フィルタ下流側から上
流側へ向け煤吹媒体を噴射ノズルから噴射することによ
って吹き飛ばされ、煤塵吸引機に吸引される。When the boiler is restarted after the periodic inspection, the dust remaining in the boiler is scattered, especially in a boiler that is not washed with water, but the dust is collected by the filter, and the dust collected by the filter is collected. Is blown off by injecting the soot blowing medium from the injection nozzle from the downstream side to the upstream side of the filter, and is sucked by the dust suction device.
【００１３】この結果、脱硝触媒の上に煤塵が堆積せ
ず、脱硝触媒が目詰りを起こさなくなり、清掃を頻繁に
行う必要がなくなってその都度ボイラの運転を停止しな
くて済み、又、脱硝触媒の目詰りによる抵抗の増加も避
けられ燃焼用空気を圧送する押込通風機の動力費も少な
くて済む。As a result, the dust does not accumulate on the denitration catalyst, the clogging of the denitration catalyst does not occur, the cleaning does not need to be performed frequently, and the operation of the boiler does not have to be stopped each time. An increase in resistance due to catalyst clogging can be avoided, and the power cost of the push-in ventilator for pumping combustion air can be reduced.
【００１４】前記脱硝装置の目詰り防止装置において、
フィルタを挟んで噴射ノズルと対向するように配設され
た集塵コーンと、該集塵コーンと脱硝反応器の下流側に
設けられる集塵装置入側のダクトとを接続する煤塵吸引
配管と、該煤塵吸引配管途中に設けられ、噴射ノズルか
らの煤吹媒体噴射時に連動して開操作される遮断弁とに
よって煤塵吸引機を構成した場合、前記噴射ノズルから
の煤吹媒体噴射時に連動して遮断弁を開くと、脱硝反応
器の入側の圧力の方が集塵装置入側の圧力より高いた
め、該圧力差により、専用のブロワ等を用いなくても、
前記噴射ノズルから噴射される煤吹媒体によって吹き飛
ばされた煤塵は、煤塵吸引機の集塵コーンに吸引され、
煤塵吸引配管を介して集塵装置入側のダクト内に送り込
まれ、集塵装置で捕集され、処理される。[0014] In the clogging prevention device of the denitration device,
A dust collection cone disposed so as to face the injection nozzle with the filter interposed therebetween, and a dust suction pipe connecting the dust collection cone and a duct on the dust collection device input side provided downstream of the denitration reactor, When a dust suction device is provided in the middle of the dust suction pipe, and a shutoff valve is opened in conjunction with the emission of the soot blowing medium from the injection nozzle, the dust suction device is interlocked with the emission of the soot blowing medium from the injection nozzle. When the shut-off valve is opened, the pressure on the inlet side of the denitration reactor is higher than the pressure on the dust collector inlet side.
The dust blown off by the soot blowing medium injected from the injection nozzle is sucked into a dust collection cone of a dust suction device,
It is fed into the duct on the dust collector entry side through the dust suction pipe, collected by the dust collector, and processed.
【００１５】又、噴射ノズルと集塵コーンとを対向させ
た状態でフィルタに沿って移動させる移動装置を備える
ようにした場合、該移動装置の駆動により、噴射ノズル
と集塵コーンとを対向させた状態でフィルタに沿って移
動させると、フィルタ全面に噴射ノズルと集塵コーンと
を配置しなくても、フィルタ全面に亘って煤塵の除去が
行われる。When a moving device is provided for moving the spray nozzle and the dust collecting cone along the filter in a state of facing each other, the moving device drives the jet nozzle and the dust collecting cone to face each other. If the filter is moved along the filter in a state where the filter is set, the dust is removed over the entire surface of the filter without disposing the injection nozzle and the dust collecting cone on the entire surface of the filter.
【００１６】[0016]
【発明の実施の形態】以下、本発明の実施の形態を図示
例と共に説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１７】図１〜図３は本発明を実施する形態の一例
であって、図中、図４と同一の符号を付した部分は同一
物を表わしており、脱硝反応器３の入側に、排ガス中に
含まれる煤塵を捕集するためのメッシュの細かい金網等
を利用したフィルタ６を設けると共に、該フィルタ６下
流側から上流側へ向け蒸気等の煤吹媒体を噴射してフィ
ルタ６に捕集された煤塵を吹き飛ばすための噴射ノズル
７と、該噴射ノズル７から噴射される煤吹媒体によって
吹き飛ばされた煤塵を吸引するための煤塵吸引機８とを
配設したものである。FIGS. 1 to 3 show an embodiment of the present invention. In FIG. 1 to FIG. 3, portions denoted by the same reference numerals as those in FIG. A filter 6 using a fine wire mesh or the like for collecting dust contained in the exhaust gas, and injecting a soot blowing medium such as steam from the downstream side of the filter 6 to the upstream side to the filter 6. An injection nozzle 7 for blowing off the collected dust and a dust suction device 8 for sucking the dust blown off by the soot blowing medium injected from the injection nozzle 7 are provided.
【００１８】前記噴射ノズル７は、図２に示す如く、フ
ィルタ６の下方にスライド自在に配設され且つ蒸気等の
煤吹媒体が供給される煤吹媒体供給配管９から分岐させ
た枝管１０に所要間隔をあけて多数配設してある。As shown in FIG. 2, the injection nozzle 7 is slidably disposed below the filter 6 and branches from a soot blowing medium supply pipe 9 to which a soot blowing medium such as steam is supplied. Many are arranged at required intervals.
【００１９】又、前記煤塵吸引機８は、前記煤吹媒体供
給配管９と平行に延びるようフィルタ６の上方にスライ
ド自在に配設された煤塵吸引配管１１から、前記枝管１
０と平行に延びる枝管１２を分岐させ、該枝管１２に、
フィルタ６を挟んで噴射ノズル７と対向するよう集塵コ
ーン１３を配設し、前記煤塵吸引配管１１を脱硝反応器
３の下流側に設けられる集塵装置５入側のダクト１４に
煤塵吸引配管１１’を介して接続すると共に、該煤塵吸
引配管１１’途中に、噴射ノズル７からの煤吹媒体噴射
時に連動して開操作される遮断弁１５を設けてなる構成
を有している。The dust suction device 8 is connected to the branch pipe 1 through a dust suction pipe 11 slidably disposed above the filter 6 so as to extend in parallel with the soot blowing medium supply pipe 9.
The branch pipe 12 extending in parallel to 0 is branched, and
A dust collecting cone 13 is disposed so as to face the injection nozzle 7 with the filter 6 interposed therebetween. The dust suction pipe 11 is connected to a dust collection pipe 5 provided on the downstream side of the denitration reactor 3 on a dust collecting apparatus 5 entrance side. 11 ', and a shutoff valve 15 is provided in the middle of the dust suction pipe 11' so as to be opened in conjunction with the injection of the soot blowing medium from the injection nozzle 7.
【００２０】更に、前記フィルタ６の両幅端部にはガイ
ドレール１６を設け、該ガイドレール１６に沿って転動
自在なガイドローラ１７，１８を前記各枝管１０，１２
の先端部に取り付け、前記煤吹媒体供給配管９と煤塵吸
引配管１１とを連結部材１９で連結し、該連結部材１９
にシリンダ等の移動装置２０を取り付け、該移動装置２
０の駆動により、煤吹媒体供給配管９と煤塵吸引配管１
１をガイドレール１６に沿って移動させ、噴射ノズル７
と集塵コーン１３とを対向させた状態でフィルタ６に沿
って移動させ、フィルタ６全面に亘って煤塵の除去を行
えるようにしてある。Further, guide rails 16 are provided at both width ends of the filter 6, and guide rollers 17, 18 which can roll along the guide rails 16 are connected to the branch pipes 10, 12, respectively.
The soot blowing medium supply pipe 9 and the dust suction pipe 11 are connected by a connecting member 19.
A moving device 20 such as a cylinder is attached to the
0, the soot blowing medium supply pipe 9 and the dust suction pipe 1
1 is moved along the guide rail 16 and the injection nozzle 7 is moved.
The dust collecting cone 13 is moved along the filter 6 in a state where the dust collecting cone 13 is opposed to the dust collecting cone 13 so that dust can be removed over the entire surface of the filter 6.
【００２１】次に、上記図示例の作動を説明する。Next, the operation of the illustrated example will be described.
【００２２】ボイラを定期点検後に再起動した場合、特
に水洗を行わないボイラでは、ボイラ内に残った煤塵が
飛散するが、該煤塵は、メッシュの細かい金網等を利用
したフィルタ６によって捕集される。When the boiler is restarted after the periodic inspection, dust remaining in the boiler is scattered, especially in a boiler that is not washed with water, but the dust is collected by a filter 6 using a fine wire mesh or the like. You.
【００２３】前記フィルタ６に捕集された煤塵は、該フ
ィルタ６下流側から上流側へ向け蒸気等の煤吹媒体を噴
射ノズル７から噴射することによって吹き飛ばされ、こ
の時、遮断弁１５を開くと、脱硝反応器３の入側の圧力
の方が集塵装置５入側の圧力より高いため、該圧力差に
より、専用のブロワ等を用いなくても、前記噴射ノズル
７から噴射される煤吹媒体によって吹き飛ばされた煤塵
は、煤塵吸引機８の集塵コーン１３に吸引され、枝管１
２から煤塵吸引配管１１と煤塵吸引配管１１’とを介し
て集塵装置５入側のダクト１４内に送り込まれ、集塵装
置５で捕集され、処理される。The dust collected by the filter 6 is blown off by injecting a soot blowing medium such as steam from the downstream side to the upstream side of the filter 6 from the injection nozzle 7, and at this time, the shutoff valve 15 is opened. Since the pressure on the inlet side of the denitration reactor 3 is higher than the pressure on the inlet side of the dust collector 5, the pressure difference causes the soot injected from the injection nozzle 7 without using a dedicated blower or the like. The dust blown off by the blowing medium is sucked into the dust collecting cone 13 of the dust suction device 8 and is branched.
From 2, it is fed into the duct 14 on the entry side of the dust collecting device 5 via the dust suction piping 11 and the dust suction piping 11 ′, and is collected and processed by the dust collecting device 5.
【００２４】ここで、移動装置２０の駆動により、煤吹
媒体供給配管９と煤塵吸引配管１１をガイドレール１６
に沿って移動させ、噴射ノズル７と集塵コーン１３とを
対向させた状態でフィルタ６に沿って移動させると、フ
ィルタ６全面に噴射ノズル７と集塵コーン１３とを配置
しなくても、フィルタ６全面に亘って煤塵の除去が行わ
れる。When the moving device 20 is driven, the soot blowing medium supply pipe 9 and the dust suction pipe 11 are connected to the guide rail 16.
Is moved along the filter 6 with the ejection nozzle 7 and the dust collection cone 13 facing each other, without disposing the ejection nozzle 7 and the dust collection cone 13 on the entire surface of the filter 6. Dust is removed over the entire surface of the filter 6.
【００２５】この結果、脱硝触媒の上に煤塵が堆積せ
ず、脱硝触媒が目詰りを起こさなくなり、清掃を頻繁に
行う必要がなくなってその都度ボイラの運転を停止しな
くて済み、又、脱硝触媒の目詰りによる抵抗の増加も避
けられ燃焼用空気を圧送する押込通風機の動力費も少な
くて済む。As a result, dust does not accumulate on the denitration catalyst, the clogging of the denitration catalyst does not occur, and the need for frequent cleaning is eliminated, so that the operation of the boiler does not have to be stopped each time. An increase in resistance due to catalyst clogging can be avoided, and the power cost of the push-in ventilator for pumping combustion air can be reduced.
【００２６】こうして、脱硝反応器３内に充填された脱
硝触媒に対する煤塵の堆積を防ぎ、脱硝触媒の目詰りを
防止し得、清掃間隔を延長してボイラ連続運転時間を延
長し得、燃焼用空気を圧送する押込通風機の動力費低減
をも図り得る。In this way, the accumulation of dust on the denitration catalyst filled in the denitration reactor 3 can be prevented, the clogging of the denitration catalyst can be prevented, the cleaning interval can be extended, and the continuous operation time of the boiler can be extended. It is also possible to reduce the power cost of a forced air blower for feeding air.
【００２７】尚、本発明の脱硝装置の目詰り防止装置
は、上述の図示例にのみ限定されるものではなく、本発
明の要旨を逸脱しない範囲内において種々変更を加え得
ることは勿論である。The device for preventing clogging of the denitration apparatus according to the present invention is not limited to the above-described example, but may be variously modified without departing from the gist of the present invention. .
【００２８】[0028]
【発明の効果】以上、説明したように本発明の請求項１
〜３記載の脱硝装置の目詰り防止装置によれば、脱硝反
応器内に充填された脱硝触媒に対する煤塵の堆積を防
ぎ、脱硝触媒の目詰りを防止し得、清掃間隔を延長して
ボイラ連続運転時間を延長し得、燃焼用空気を圧送する
押込通風機の動力費低減をも図り得るという優れた効果
を奏し得る。As described above, the first aspect of the present invention is as described above.
According to the apparatus for preventing clogging of the denitration apparatus according to any one of the first to third aspects, accumulation of dust on the denitration catalyst filled in the denitration reactor can be prevented, clogging of the denitration catalyst can be prevented, the cleaning interval can be extended, and It is possible to obtain an excellent effect that the operation time can be extended and the power cost of the push-in ventilation device for feeding the combustion air can be reduced.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明を実施する形態の一例の全体概要構成図
である。FIG. 1 is an overall schematic configuration diagram of an example of an embodiment of the present invention.
【図２】本発明を実施する形態の一例の概要斜視図であ
る。FIG. 2 is a schematic perspective view of an example of an embodiment of the present invention.
【図３】図１のＩＩＩ部拡大図である。FIG. 3 is an enlarged view of a part III in FIG. 1;
【図４】従来例の全体概要構成図である。FIG. 4 is an overall schematic configuration diagram of a conventional example.
１ ダクト ２ アンモニア注入ノズル ３ 脱硝反応器 ５ 集塵装置 ６ フィルタ ７ 噴射ノズル ８ 煤塵吸引機 １１ 煤塵吸引配管 １１’ 煤塵吸引配管 １３ 集塵コーン １４ ダクト １５ 遮断弁 ２０ 移動装置 Reference Signs List 1 duct 2 ammonia injection nozzle 3 denitration reactor 5 dust collector 6 filter 7 injection nozzle 8 dust suction machine 11 dust suction pipe 11 'dust suction pipe 13 dust collection cone 14 duct 15 shutoff valve 20 moving device
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ２３Ｊ 15/00 Ａ Ｆターム(参考） 3K070 DA07 DA14 DA25 DA27 DA32 DA35 DA39 4D048 AA06 AB02 AB03 AC04 CA04 CC12 CC16 CC38 CD05 CD08 CD10 4D058 JA12 JB03 JB24 KC04 MA17 MA33 MA47 SA20 TA06 UA25──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (reference) F23J 15/00 A F term (reference) 3K070 DA07 DA14 DA25 DA27 DA32 DA35 DA39 4D048 AA06 AB02 AB03 AC04 CA04 CC12 CC16 CC38 CD05 CD08 CD10 4D058 JA12 JB03 JB24 KC04 MA17 MA33 MA47 SA20 TA06 UA25
Claims (3)
ダクト途中に、アンモニアを注入するアンモニア注入ノ
ズルを配設すると共に、該アンモニア注入ノズルより下
流側に、内部に脱硝触媒が充填された脱硝反応器を設け
てなる脱硝装置の目詰り防止装置であって、 脱硝反応器の入側に、排ガス中に含まれる煤塵を捕集す
るためのフィルタを設けると共に、該フィルタ下流側か
ら上流側へ向け煤吹媒体を噴射してフィルタに捕集され
た煤塵を吹き飛ばすための噴射ノズルと、該噴射ノズル
から噴射される煤吹媒体によって吹き飛ばされた煤塵を
吸引するための煤塵吸引機とを配設したことを特徴とす
る脱硝装置の目詰り防止装置。1. A denitration reaction in which an ammonia injection nozzle for injecting ammonia is provided in the middle of a duct through which exhaust gas discharged from a boiler flows, and a denitration catalyst is filled in the downstream of the ammonia injection nozzle. A filter for clogging dust contained in exhaust gas is provided on the inlet side of the denitration reactor, and a filter is provided from the downstream side to the upstream side of the filter. An injection nozzle for injecting the soot blowing medium to blow off the dust collected by the filter and a dust suction device for sucking the dust blown off by the soot blowing medium injected from the injection nozzle are provided. A device for preventing clogging of a denitration device.
ように配設された集塵コーンと、 該集塵コーンと脱硝反応器の下流側に設けられる集塵装
置入側のダクトとを接続する煤塵吸引配管と、 該煤塵吸引配管途中に設けられ、噴射ノズルからの煤吹
媒体噴射時に連動して開操作される遮断弁とによって煤
塵吸引機を構成した請求項１記載の脱硝装置の目詰り防
止装置。2. A dust collecting cone disposed so as to face an injection nozzle with a filter interposed therebetween, and the dust collecting cone and a duct on a dust collecting device inlet side provided downstream of a denitration reactor are connected. 2. The clogging of the denitration apparatus according to claim 1, wherein the dust suction pipe is constituted by a dust suction pipe, and a shutoff valve provided in the middle of the dust suction pipe and opened in conjunction with the soot blowing medium injection from the injection nozzle. Prevention device.
状態でフィルタに沿って移動させる移動装置を備えた請
求項２記載の脱硝装置の目詰り防止装置。3. The apparatus for preventing clogging of a denitration apparatus according to claim 2, further comprising a moving device that moves the injection nozzle and the dust collecting cone along the filter in a state where the nozzle and the dust collecting cone face each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000287186A JP4360023B2 (en) | 2000-09-21 | 2000-09-21 | Denitration device clogging prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000287186A JP4360023B2 (en) | 2000-09-21 | 2000-09-21 | Denitration device clogging prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002095919A true JP2002095919A (en) | 2002-04-02 |
| JP4360023B2 JP4360023B2 (en) | 2009-11-11 |
Family
ID=18770977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000287186A Expired - Fee Related JP4360023B2 (en) | 2000-09-21 | 2000-09-21 | Denitration device clogging prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4360023B2 (en) |
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| CN113426291A (en) * | 2021-07-19 | 2021-09-24 | 凯里市凯荣玻璃有限公司 | Denitration system catalyst dust cleaning device and dust cleaning method |
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|---|---|
| JP4360023B2 (en) | 2009-11-11 |
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