JPH01296000A - Treatment of tunnel waste gas - Google Patents
Treatment of tunnel waste gasInfo
- Publication number
- JPH01296000A JPH01296000A JP63121956A JP12195688A JPH01296000A JP H01296000 A JPH01296000 A JP H01296000A JP 63121956 A JP63121956 A JP 63121956A JP 12195688 A JP12195688 A JP 12195688A JP H01296000 A JPH01296000 A JP H01296000A
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- exhaust gas
- detector
- main duct
- nox
- 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
- 239000002912 waste gas Substances 0.000 title abstract 4
- 239000003463 adsorbent Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000007800 oxidant agent Substances 0.000 claims description 16
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims 1
- 150000001340 alkali metals Chemical class 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000007789 gas Substances 0.000 description 30
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 15
- 230000000694 effects Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- -1 alkali metal chlorite Chemical class 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 3
- 229960002218 sodium chlorite Drugs 0.000 description 3
- 229910001919 chlorite Inorganic materials 0.000 description 2
- 229910052619 chlorite group Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 210000003169 central nervous system Anatomy 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、トンネル内の排気ガスの処理に関し、特にト
ンネル内で自動車から排出されるＮＯｘガスを除去排出
するトンネル排ガス処理方式に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the treatment of exhaust gas in a tunnel, and particularly to a tunnel exhaust gas treatment method for removing and discharging NOx gas emitted from automobiles in a tunnel.
（従来の技術）
従来、トンネルの入口又は途中に走行自動車台数検知器
、煙霧透過率計や一酸化炭素濃度計等の汚染ガス検知器
等を配置してトンネル内の汚染状況を予測、測定し、汚
染量が許容値以内になるように、トンネル内のジェット
ファンや軸流ファンを稼働させる方法が採用されている
。(Prior art) Conventionally, pollution gas detectors such as a vehicle number detector, a smoke transmittance meter, and a carbon monoxide concentration meter are placed at the entrance or halfway through a tunnel to predict and measure the pollution situation inside the tunnel. In order to keep the amount of contamination within acceptable limits, a method has been adopted in which jet fans and axial fans are operated inside the tunnel.
ＮＯｘを最も多量に排出する発生源は自動車であるが、
ＮＯｘは自然環境及び人体に少なからぬ悪影響を及ぼす
。The source that emits the largest amount of NOx is automobiles,
NOx has considerable adverse effects on the natural environment and the human body.
トンネル内の排ガスはＮＯｘ濃度は低いが、風量が多大
であり、従来トンネル内のそうした排ガス処理では、走
行自動車台数又は時間帯による排気風量を制御している
。Exhaust gas in tunnels has a low NOx concentration, but has a large air volume, and conventional exhaust gas treatment in tunnels has controlled the exhaust air volume depending on the number of vehicles traveling or the time of day.
（発明が解決しようとする問題点）
ＮＯｘは動物の中枢神経あるいは呼吸器系に障害を与え
、また植物の枝葉を枯らす等の悪影響を与えるため、環
境基準を上回る恐れのある汚染ＮＯｘガス量を含むトン
ネル排ガスは、その除去処理を施した後、自然大気中へ
放出しなければならない。(Problem to be solved by the invention) NOx causes damage to the central nervous system or respiratory system of animals, and also has negative effects such as withering the branches and leaves of plants. Tunnel exhaust gases containing tunnels must be removed and then released into the natural atmosphere.
トンネル内の排ガスはＮＯｘ濃度は低く大風量であるが
、これに適した処理装置はなく、既存技術で対応しよう
とすると設備費、運転費とも、非常に高くなってしまう
。Exhaust gas in tunnels has a low concentration of NOx and a large volume of air, but there is no treatment equipment suitable for this, and if existing technology were used to deal with this, both equipment and operating costs would be extremely high.
例えば、■メインダクトにＮＯｘ除去用の排ガス処理装
置を設置してＮＯｘ除去した後自然大気に放出する場合
、最大排気風量に対して計画し設置するので、常時（２
４時間）運転するため、処理装置内の吸着剤の寿命が短
くなり運転費が高くなってしまう、また■メインダクト
にＮＯｘ除去用の排ガス処理装置を設ける場合、処理風
量、ＮＯｘ濃度等の変化が大きいため、処理装置内の吸
着剤の除去効率変化、寿命予測が難しい、等の問題があ
る。For example, ■ If you install an exhaust gas treatment device for NOx removal in the main duct and release it into the natural atmosphere after removing NOx, the plan is to plan and install it for the maximum exhaust air volume, so it will always be
(4 hours) operation, which shortens the life of the adsorbent in the treatment equipment and increases operating costs.Also, when installing an exhaust gas treatment equipment for NOx removal in the main duct, changes in processing air volume, NOx concentration, etc. Because of this large amount, there are problems such as changes in the removal efficiency of the adsorbent in the processing equipment and difficulty in predicting its lifespan.
（問題点を解決するための手段）
すなわち本発明は、上記各種問題を解決するものであっ
て、（Ｉ）トンネルの入口又は途中に走行自動車台数検
知器、汚染ガス検知器等の各種センサを備え、それぞれ
の検知器からの値によりトンネル内横坑に配置されたジ
ェットファン及び立坑に配置された軸流ファンの運転量
を制御するトンネル排ガス処理方式において、軸流ファ
ンから導出されるメインダクト内のＮＯｘ濃度と風量を
測定して、メインダクトからの分岐ダクｌ〜に連結され
た複数の排気処理装置の稼働台数及び強度を制御するよ
うにしたことを特徴とするトンネル排ガス処理方式と、
（２）トンネルの入口又は途中に走行自動車台数検知器
、汚染ガス検知器等の各種センサを備え、それぞれの検
知器からの値によりトンネル内横坑に配置されたジェッ
トファン及び立坑に配置された軸流ファンの運転量を制
御するトンネル排ガス処理方式において、軸流ファンか
ら導出されるメインダクト内と、メインダクトから分岐
して連結された複数の排気処理装置の入口及び出口のＮ
Ｏｘ濃度と風量を測定して、ＮＯｘ除去効率を演算し、
前記複数の排気処理装置の稼働台数及び強度を制御する
ようにしたことを特徴とするトンネル排ガス処理方式と
、（３）トンネルの入口又は途中に走行自動車台数検知
器、汚染ガス検知器等の各種センサを備え、それぞれの
検知器からの値によりトンネル内横坑に配置されたジェ
ットファン及び立坑に配置された軸流ファンの運転量を
制御するトンネル排ガス処理方式において、軸流ファン
から導出されるメインダクトからの分岐ダクトに連結さ
れた複数の排気処理装置が、中間層として、セラミック
担体にアルカリ金属亜塩素酸塩及びアルカリ金属水酸化
物を担持させて構成したＮｏをＮＯ２に酸化する酸化剤
層を配し、それを挟装する前後層として、活性炭にアル
カリ金属水酸化物を添着して構成したＳＯ２、Ｎｏ□等
を吸着する吸着剤層を配してなるものであることを特徴
とするトンネル排ガス処理方式である。(Means for Solving the Problems) That is, the present invention solves the various problems mentioned above. In the tunnel exhaust gas treatment system, the operating amount of the jet fan placed in the tunnel tunnel and the axial fan placed in the vertical shaft is controlled based on the values from the respective detectors. A tunnel exhaust gas treatment method, characterized in that the number and intensity of operation of a plurality of exhaust treatment devices connected to branch ducts l~ from the main duct are controlled by measuring the NOx concentration and air volume in the tunnel,
(2) Equipped with various sensors such as a vehicle number detector and a polluted gas detector at the entrance or halfway through the tunnel, and jet fans placed in the tunnel tunnel and jet fans placed in the vertical shaft are installed based on the values from each detector. In a tunnel exhaust gas treatment system that controls the operating amount of an axial fan, the N in the main duct led out from the axial fan and at the inlet and outlet of multiple exhaust treatment devices branched from the main duct and connected.
Measures Ox concentration and air volume, calculates NOx removal efficiency,
A tunnel exhaust gas treatment method characterized in that the number of operating units and strength of the plurality of exhaust treatment devices are controlled; and (3) various types of detectors for the number of vehicles running, polluted gas detectors, etc. at the entrance or halfway of the tunnel. In a tunnel exhaust gas treatment system that is equipped with a sensor and controls the operating amount of a jet fan placed in a tunnel tunnel and an axial fan placed in a vertical shaft based on the values from each detector, it is derived from an axial fan. A plurality of exhaust treatment devices connected to branch ducts from the main duct are equipped with an oxidizing agent that oxidizes NO to NO2, which is composed of a ceramic carrier supporting an alkali metal chlorite and an alkali metal hydroxide, as an intermediate layer. It is characterized by having adsorbent layers for adsorbing SO2, No. This is a tunnel exhaust gas treatment method.
（実施例） 本発明の実施例を第１図に基づいて説明する。(Example) An embodiment of the present invention will be described based on FIG.
第１図は、本発明実施例の構成の略説図であり、トンネ
ル入口には走行自動車台数検知器、時間帯測定器等が設
けられており、それらからの情報がトンネル内横坑のジ
ェットファン、立坑の軸流ファン１に伝えられ、それら
の運転量が制御される。FIG. 1 is a schematic diagram of the configuration of an embodiment of the present invention, in which a detector for the number of running vehicles, a time zone measuring device, etc. are installed at the tunnel entrance, and information from these is transmitted to the jet fan in the tunnel tunnel. , is transmitted to the axial flow fan 1 of the shaft, and their operating amount is controlled.
本発明の基本構想は、軸流ファン１から導出されるメイ
ンダクト１１の排ガスを制御処理することである。The basic idea of the present invention is to control and process the exhaust gas from the main duct 11 that is led out from the axial fan 1.
まず、メインダクト１１の末端に４本の分岐ダクト１１
１〜１１４が分岐され、各分岐ダクトに送風機２１〜２
４、排気処理装置６１〜６４、及び出口支管４１′〜４
４′が連結されており、最後に排気ダクト７に集中され
ている。First, there are four branch ducts 11 at the ends of the main duct 11.
1 to 114 are branched, and each branch duct has blowers 21 to 2.
4. Exhaust treatment devices 61-64 and outlet branch pipes 41'-4
4' are connected and finally concentrated in the exhaust duct 7.
メインダクト１１末端内には風量センサ及びＮ○Ｘセン
サが設けられており、風量計Ｗ及び第１ＮＯｘ濃度計Ｎ
１によって風量（饋コ／Ｈ）及びＮＯｘ濃度（ＰＰＭ
）が測定される。次いで、風量計ＷとＮＯｘ濃度計Ｎ１
からの情報が第１演算器Ｃ１に入り演算されて、指示器
りに伝達される。An air volume sensor and a NOx sensor are provided at the end of the main duct 11, and an air volume sensor W and a first NOx concentration meter N
1, the air volume (Feed/H) and NOx concentration (PPM
) is measured. Next, the airflow meter W and the NOx concentration meter N1
The information from the controller enters the first calculator C1, is calculated, and is transmitted to the indicator.
指示器りからの信号は、ダンパー３１〜３８、及び送風
機２１〜２４に伝えられ、それらの開閉、０Ｎ−ＯＦＦ
操作制御が行われる。Signals from the indicator are transmitted to the dampers 31 to 38 and the blowers 21 to 24, and control their opening/closing, ON-OFF
Operation control is performed.
ダンパー３１．３３，３５．３７は分岐ダクト１１１〜
１１４とバイパス管５１〜５４の間に設けられ、また、
ダンパー３２．３４，３６．３８は送風機２１〜２４と
排気処理装置６１〜６４の間に設けられている。Dampers 31.33, 35.37 are branch ducts 111~
114 and the bypass pipes 51 to 54, and
The dampers 32, 34, 36, 38 are provided between the blowers 21-24 and the exhaust treatment devices 61-64.
いま、指示器りからの情報が、■ＮＯｘ量が環境基準以
下（例えば、ＮＯｘ量： ０ 、５ｍ’ ／Ｈ以下）で
ある場合は、総ての送風機２１〜２４はＯＦＦ、ダンパ
ー３２．３４，３６．３８は閉、ダンパー３１．３３，
３５．３７は開とし、総ての排気処理装置６１，６２，
６３．６４は停止し、バイパス（バイパス管５１，５２
，５３．５４を通過）するように制御される。Now, if the information from the indicator is that the amount of NOx is below the environmental standard (for example, the amount of NOx: 0, 5 m'/H or less), all the blowers 21 to 24 are turned off and the damper 32.34 , 36.38 is closed, damper 31.33,
35 and 37 are open, and all exhaust treatment devices 61, 62,
63 and 64 are stopped and the bypass (bypass pipes 51, 52
, 53, 54).
■ＮＯｘ量： ０．５〜ｌ 、 Ｏ＋＊’ ／Ｈの場合
は、送風機２１．２２はＯＮ、送風機２３．２４はＯＦ
Ｆ、ダンパー３２．３４は開、ダンパー３６゜３８及び
３１，３３．３５．３７は閉とし、排気処理装置６１．
６２の２台を動かし、残６３，６４の２台は停止し、バ
イパスさせる。■NOx amount: 0.5~l, O+*'/H, blower 21.22 is ON, blower 23.24 is OFF
F, dampers 32, 34 are open, dampers 36, 38 and 31, 33, 35, 37 are closed, exhaust treatment device 61.
Two units 62 are operated, and the remaining two units 63 and 64 are stopped and bypassed.
■ＮＯｘ量： ｌ ｍ” ／ １１以上の場合は、総て
の送風機２１〜２４はＯＮ、ダンパー３２．３４．３６
．３８は開、ダンパー３１．３３．３５．３７は閉とし
、排気処理装置６１，６２，６３．６４の総てを動かす
。■NOx amount: If it is 1 m” / 11 or more, all blowers 21 to 24 are turned on and dampers 32, 34, and 36 are turned on.
．． 38 is open, dampers 31, 33, 35, and 37 are closed, and all of the exhaust treatment devices 61, 62, 63, and 64 are operated.
なお、使用により能力減衰した排気処理装置６１．６２
，６３．６４中の処理剤（中間層、前後層としての吸着
剤及び酸化剤）を新しい処理剤（吸着剤、酸化剤）と交
換する際、それを−時に無駄なく行えるようにするには
、指示器りから各送風機毎の稼働時間、各ダンパーの開
度等の所要指令信号を送って前記各排気処理装置の負荷
を平均化するように制御すればよい。In addition, the exhaust treatment equipment 61, 62 whose capacity has decreased due to use.
, 63.64 When replacing the processing agent (adsorbent and oxidizing agent as the intermediate layer, front and rear layers) with a new processing agent (adsorbent, oxidizing agent), how to do it without wasting time. It is sufficient to send necessary command signals such as the operating time of each blower and the opening degree of each damper from the indicator to control the load on each exhaust treatment device to be averaged.
さらに、本処理方式における排ガス中のＮＯｘのより適
正な制御処理をするには、メインダクト１１内の第１Ｎ
Ｏｘ計Ｎ１による測定だけでなく、排気処理装置６１，
６２，６３．６４の入口及び出口における第２ＮＯｘ計
Ｎ２によるＮＯｘの測定を必要とする。それらの測定結
果に基づいて、ＮＯｘの適正な制御処理が行えるもので
ある。Furthermore, in order to more appropriately control NOx in the exhaust gas in this treatment method, it is necessary to
In addition to the measurement by the Ox meter N1, the exhaust treatment device 61,
It is necessary to measure NOx using a second NOx meter N2 at the inlet and outlet of 62, 63, and 64. Based on these measurement results, appropriate NOx control processing can be performed.
その実施のため、メインダクト、各処理装置の入口（入
口支管４１〜４４）、及び出口（出口支管４１′〜４４
′）側にサンプリング口を設け、ガスを吸引することに
よってＮＯｘ濃度を測定する。For its implementation, the main duct, the inlet of each processing device (inlet branch pipes 41 to 44), and the outlet (outlet branch pipes 41' to 44)
A sampling port is provided on the ') side and the NOx concentration is measured by sucking the gas.
例えば６４の排気処理装置の入口側ＮＯｘ濃度を測定す
る場合には、電磁弁１０１を開、１０２〜１０３を閉と
し、３方弁９１を入口側に切り換えることにより測定す
る。次に３方弁９１を出口側に切り換えることにより、
出口側ＮＯｘ濃度を測定し、除去効率を計算し、また経
時的除去率変化等をグラフ化する。このようにして、順
次排気処理装置６１，６２，６３，６４、及びメインダ
クト１１のＮＯｘ除去率を測定し、グラフ化する。For example, when measuring the NOx concentration on the inlet side of the exhaust treatment device 64, the measurement is performed by opening the electromagnetic valve 101, closing the solenoid valves 102 to 103, and switching the three-way valve 91 to the inlet side. Next, by switching the three-way valve 91 to the outlet side,
The NOx concentration on the outlet side is measured, the removal efficiency is calculated, and the change in removal rate over time is graphed. In this way, the NOx removal rates of the exhaust treatment devices 61, 62, 63, 64 and the main duct 11 are sequentially measured and graphed.
あらかじめ、新しい吸着剤、酸化剤を装填した排気処理
装置を通した場合のモデルグラフと、処理能力の低減し
た排気処理装置を通した場合のモデルグラフを作成して
おき、随時それらモデルグラフと比較することによって
、現在の排気処理装置の処理能力を知り、またその吸着
剤、酸化剤の交換時期を予知、決定することができる。In advance, create a model graph for the case when the exhaust gas is passed through the exhaust treatment equipment loaded with new adsorbent and oxidizing agent, and a model graph for the case when the exhaust gas treatment equipment is passed through the exhaust treatment equipment with reduced processing capacity, and compare them with these model graphs at any time. By doing so, it is possible to know the processing capacity of the current exhaust treatment equipment, and also to predict and determine when to replace the adsorbent and oxidizer.
次に、排気処理装置について説明する。Next, the exhaust treatment device will be explained.
本発明では、トンネル排ガスを図示のごとく吸着剤層Ａ
土酸化剤層Ｂ十吸着剤層Ａの３層からなるフィルタを通
すことによって、効率良く長時間処理を続けることが可
能になった。In the present invention, the tunnel exhaust gas is transferred to the adsorbent layer A as shown in the figure.
By passing the soil through a filter consisting of three layers: soil oxidizer layer B and adsorbent layer A, it has become possible to continue the treatment efficiently for a long time.
吸着剤層Ａは、活性炭にアルカリ金属水酸化物（例えば
、水酸化カリウム、水酸化ナトリウム）を添着したもの
で、排ガス中のＳＯ２、アルデヒド、ＮＯ２等を吸着除
去するものである。The adsorbent layer A is made of activated carbon impregnated with an alkali metal hydroxide (for example, potassium hydroxide, sodium hydroxide), and adsorbs and removes SO2, aldehyde, NO2, etc. in the exhaust gas.
酸化剤層Ｂは、セラミック担体く例えば、活性Ａ ｌ
２０３、Ｚｒ０２）にアルカリ金属亜塩素酸塩（例えば
、亜塩素酸ナトリウム）及びアルカリ金属水酸化物く例
えば、水酸化カリウム）を担持させてなるもので、排ガ
ス中のＮＯをＮｏ２に酸化し、またＮＯｘどして吸老す
る能力も有する。The oxidizing agent layer B is made of a ceramic carrier, for example, active Al
203, Zr02) supporting an alkali metal chlorite (e.g., sodium chlorite) and an alkali metal hydroxide (e.g., potassium hydroxide), which oxidizes NO in exhaust gas to No2, It also has the ability to absorb NOx.
このような吸着剤ＩＡと酸化剤ＪｍＩ３をＡ−Ｂ−Ａの
３層配列に装填し、排ガスを通すと、Ａ層で排ガス中の
Ｓ０２、アルデヒド、Ｎ Ｏｘ等が吸着除去され、Ｎｏ
だけが次のＢＪＷに入り、そこでＮＯが酸化されてＮＯ
２の形になり、その後、Ａ層に導かれＮ０２として吸着
除去される。When such adsorbent IA and oxidizer JmI3 are loaded in a three-layer arrangement of A-B-A and exhaust gas is passed through, S02, aldehydes, NOx, etc. in the exhaust gas are adsorbed and removed in the A layer, and NO.
only enters the next BJW, where NO is oxidized and becomes NO
After that, it is introduced into the A layer and adsorbed and removed as N02.
トンネル排ガスの成分中には、ＮＯｘだけでなく Ｓ
Ｏ２、アルデヒド類、粉塵等が含まれており、これらが
ＮＯｘ酸化剤の妨害物質となり寿命を短くする問題があ
るが、吸着剤層＋酸化剤層→〜吸着剤層という３層のフ
ィルタの組み合わせとしたことによって、酸化剤層にお
いては、ＮＯだけが処理されるため、他の物質による妨
害を受けることなくその酸化剤処理が有効に行われ、使
用寿命を長くすることができ、効率よく長時間の連続処
理が可能となった。The components of tunnel exhaust gas include not only NOx but also S.
O2, aldehydes, dust, etc. are included, and there is a problem that these interfere with the NOx oxidizer and shorten its life. However, a combination of three layers of filters: adsorbent layer + oxidizer layer → ~adsorbent layer As a result, only NO is treated in the oxidizing agent layer, so the oxidizing agent treatment is performed effectively without being interfered with by other substances, and the service life can be extended. Continuous processing of time is now possible.
なお、吸着剤、酸化剤に添加する水酸化カリウム、亜塩
素酸ナトリウム等の量、乾燥方法等によって効果、寿命
が大きく変化するので、それらを適宜調製する。Note that the effectiveness and life span vary greatly depending on the adsorbent, the amount of potassium hydroxide, sodium chlorite, etc. added to the oxidizing agent, the drying method, etc., so these should be adjusted appropriately.
吸着剤は水酸化カリウム（４Ｎ（規定））の添着が、酸
化剤は亜塩素酸ナトリウム（４Ｎ（規定））及び水酸化
カリウム（２Ｎ（規定））の添加の組み合わせが好適な
ものであった。The combination of impregnating potassium hydroxide (4N (normal)) as the adsorbent and adding sodium chlorite (4N (normal)) and potassium hydroxide (2N (normal)) as the oxidizing agent was suitable. .
（発明の効果）
以上に詳述したとおり、本発明のトンネル排ガス処理方
式によれば次のような作用効果が得られる。(Effects of the Invention) As detailed above, the tunnel exhaust gas treatment method of the present invention provides the following effects.
（１） ＮＯｘ除去のための排気処理装置の稼働台数
、稼働時間をトータルＮＯｘ量によって制御しているた
め、装置１台当たり、また装置全体の稼働時間が減少し
、運転費が非常に安くなる。(1) Since the number and operating time of exhaust treatment equipment for NOx removal are controlled by the total NOx amount, the operating time per equipment and the entire equipment is reduced, resulting in extremely low operating costs. .
（２） ＮＯｘ除去のための排気処理装置が数台ある
ため、装置稼働時間が同じになるように制御することに
より、吸着剤交換を全台数まとめてできる（交換費も安
くなる）。(2) Since there are several exhaust treatment devices for NOx removal, by controlling the operating time of the devices to be the same, it is possible to replace all adsorbents at once (replacement costs are also reduced).
（３）随時、除去効率をグラフ等により明示できるため
、吸着剤交換時期が明確になり、またその１１も容易と
なる。(3) Since the removal efficiency can be clearly indicated using a graph or the like at any time, the timing for replacing the adsorbent becomes clear, and step 11 is also made easier.
（４）吸着剤層、酸化剤層の３層組みきわせ配列によっ
て、それら剤の使用呈が少なくてもＮＯｘ除去効率が良
く、寿命も数倍長くなったため、運転費も約１／２まで
下げることができる。また、池の既存技術に比較しても
、設備費、運転費とも相当に低減できた。(4) Due to the three-layer combination arrangement of adsorbent layer and oxidizer layer, NOx removal efficiency is good even if the use of these agents is small, and the life span is several times longer, reducing operating costs to about 1/2. Can be lowered. Additionally, compared to existing pond technology, both equipment and operating costs were significantly reduced.
第１図は、本発明実施例の構成の略説図を示す。
図中
１：軸流ファン、 １１：メインダクト、１１１〜１
１４：分岐ダクト、
２１〜２４：送風機、
６１〜６４：排気処理装置、
４１”〜４４′ ：出口支管、
７：排気ダクト、Ｗ：風量計、
Ｎ１：第１ＮＯｘ濃度計、
Ｃ１：第１演算器、 Ｄ＝指示器、
３１〜３８：ダンバー、
５１〜５４：バイパス管。
Ｎ２：第２ＮＯｘ濃度計、
４１〜４４：入口支管、
４１”〜４４′ ：出口支管、
９１〜９５：３方弁、
Ａ：吸着剤層、
Ｂ二酸化剤層FIG. 1 shows a schematic diagram of the configuration of an embodiment of the present invention. In the figure 1: Axial fan, 11: Main duct, 111-1
14: Branch duct, 21-24: Air blower, 61-64: Exhaust treatment device, 41''-44': Outlet branch pipe, 7: Exhaust duct, W: Air flow meter, N1: First NOx concentration meter, C1: First calculation D=Indicator, 31-38: Dunbar, 51-54: Bypass pipe. N2: 2nd NOx concentration meter, 41-44: Inlet branch pipe, 41''-44': Outlet branch pipe, 91-95: 3-way valve , A: Adsorbent layer, B Dioxidant layer
Claims (3)
、汚染ガス検知器等の各種センサを備え、それぞれの検
知器からの値によりトンネル内横坑に配置されたジェッ
トファン及び立坑に配置された軸流ファンの運転量を制
御するトンネル排ガス処理方式において、軸流ファンか
ら導出されるメインダクト内のＮＯｘ濃度と風量を測定
して、メインダクトからの分岐ダクトに連結された複数
の排気処理装置の稼働台数及び強度を制御するようにし
たことを特徴とするトンネル排ガス処理方式。(1) Various sensors such as a vehicle number detector and a polluted gas detector are installed at the entrance of the tunnel or along the way, and jet fans are installed in the tunnel shaft and jet fans are installed in the vertical shaft based on the values from each detector. In a tunnel exhaust gas treatment system that controls the operating amount of an axial fan, multiple exhaust treatment devices connected to branch ducts from the main duct measure the NOx concentration and air volume in the main duct derived from the axial fan. A tunnel exhaust gas treatment method characterized by controlling the number of operating units and intensity of the tunnel exhaust gas.
、汚染ガス検知器等の各種センサを備え、それぞれの検
知器からの値によりトンネル内横坑に配置されたジェッ
トファン及び立坑に配置された軸流ファンの運転量を制
御するトンネル排ガス処理方式において、軸流ファンか
ら導出されるメインダクト内と、メインダクトから分岐
して連結された複数の排気処理装置の入口及び出口のＮ
Ｏｘ濃度と風量を測定して、ＮＯｘ除去効率を演算し、
前記複数の排気処理装置の稼働台数及び強度を制御する
ようにしたことを特徴とするトンネル排ガス処理方式。(2) Equipped with various sensors such as a vehicle number detector and a polluted gas detector at the entrance or halfway through the tunnel, and jet fans placed in the tunnel tunnel and jet fans placed in the vertical shaft are installed based on the values from each detector. In a tunnel exhaust gas treatment system that controls the operating amount of an axial fan, the N in the main duct led out from the axial fan and at the inlet and outlet of multiple exhaust treatment devices branched from the main duct and connected.
Measures Ox concentration and air volume, calculates NOx removal efficiency,
A tunnel exhaust gas treatment method, characterized in that the number and strength of the plurality of exhaust treatment devices in operation are controlled.
、汚染ガス検知器等の各種センサを備え、それぞれの検
知器からの値によりトンネル内横坑に配置されたジェッ
トファン及び立坑に配置された軸流ファンの運転量を制
御するトンネル排ガス処理方式において、軸流ファンか
ら導出されるメインダクトからの分岐ダクトに連結され
た複数の排気処理装置が、中間層として、セラミック担
体にアルカリ金属亜塩素酸塩及びアルカリ金属水酸化物
を担持させて構成したＮＯをＮＯ＿２に酸化する酸化剤
層を配し、それを挟装する前後層として、活性炭にアル
カリ金属水酸化物を添着して構成したＳＯ＿２、ＮＯ＿
２等を吸着する吸着剤層を配してなるものであることを
特徴とするトンネル排ガス処理方式。(3) Equipped with various sensors such as a vehicle number detector and a polluted gas detector at the entrance or halfway through the tunnel, and based on the values from each detector, jet fans placed in the tunnel tunnel and jet fans placed in the vertical shaft are installed. In a tunnel exhaust gas treatment system that controls the operating amount of an axial fan, a plurality of exhaust treatment devices connected to branch ducts from a main duct led out from the axial fan serve as an intermediate layer containing alkali metal subchloride on a ceramic carrier. An oxidizing agent layer that oxidizes NO to NO_2, which is made by supporting an acid salt and an alkali metal hydroxide, is arranged, and SO_2 is made by impregnating activated carbon with an alkali metal hydroxide as the front and rear layers sandwiching it. , NO_
1. A tunnel exhaust gas treatment system characterized by comprising an adsorbent layer that adsorbs 2, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63121956A JPH0635721B2 (en) | 1988-05-20 | 1988-05-20 | Tunnel exhaust gas treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63121956A JPH0635721B2 (en) | 1988-05-20 | 1988-05-20 | Tunnel exhaust gas treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01296000A true JPH01296000A (en) | 1989-11-29 |
| JPH0635721B2 JPH0635721B2 (en) | 1994-05-11 |
Family
ID=14824069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63121956A Expired - Fee Related JPH0635721B2 (en) | 1988-05-20 | 1988-05-20 | Tunnel exhaust gas treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635721B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0682197U (en) * | 1993-04-30 | 1994-11-25 | 五郎 五十嵐 | Tunnel for high speed vehicles |
| JPH0788327A (en) * | 1993-09-22 | 1995-04-04 | Matsushita Electric Ind Co Ltd | Nox purging device |
| WO2005084784A1 (en) * | 2004-03-09 | 2005-09-15 | Nishimatsu Construction Co., Ltd. | Apparatus for removing nitrogen oxides and method for removing nitrogen oxides |
| JP2007021499A (en) * | 2006-10-23 | 2007-02-01 | Nishimatsu Constr Co Ltd | Removal method of nitrogen oxide and removal apparatus of nitrogen oxide |
| JP2009285592A (en) * | 2008-05-30 | 2009-12-10 | Panasonic Corp | Denitrification apparatus |
| JP2012030199A (en) * | 2010-08-03 | 2012-02-16 | Japan Pionics Co Ltd | Method for treating gas containing nitrogen oxide |
| ITCE20110001A1 (en) * | 2011-02-02 | 2012-08-03 | Luigi Antonio Pezone | LOCAL URBAN LOCAL PURIFICATION PLANTS WITH CAPTURE AND NEUTRALIZATION OF CO2 AND SMOG |
| CN103007706A (en) * | 2012-12-17 | 2013-04-03 | 甘肃省交通科学研究院有限公司 | Air purifying device suitable for long and narrow underground cavity construction period and application method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5833013A (en) * | 1981-08-20 | 1983-02-26 | Babcock Hitachi Kk | Mixed fuel spray type atomizer |
| JPS6044162A (en) * | 1983-08-18 | 1985-03-09 | Kawasaki Steel Corp | Method for measuring crack in billet guide roll of continuous casting installation and measuring device used therefore |
| JPS62237000A (en) * | 1986-04-07 | 1987-10-17 | 三菱電機株式会社 | Ventilation controller for tunnel |
-
1988
- 1988-05-20 JP JP63121956A patent/JPH0635721B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5833013A (en) * | 1981-08-20 | 1983-02-26 | Babcock Hitachi Kk | Mixed fuel spray type atomizer |
| JPS6044162A (en) * | 1983-08-18 | 1985-03-09 | Kawasaki Steel Corp | Method for measuring crack in billet guide roll of continuous casting installation and measuring device used therefore |
| JPS62237000A (en) * | 1986-04-07 | 1987-10-17 | 三菱電機株式会社 | Ventilation controller for tunnel |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0682197U (en) * | 1993-04-30 | 1994-11-25 | 五郎 五十嵐 | Tunnel for high speed vehicles |
| JPH0788327A (en) * | 1993-09-22 | 1995-04-04 | Matsushita Electric Ind Co Ltd | Nox purging device |
| WO2005084784A1 (en) * | 2004-03-09 | 2005-09-15 | Nishimatsu Construction Co., Ltd. | Apparatus for removing nitrogen oxides and method for removing nitrogen oxides |
| US7722704B2 (en) | 2004-03-09 | 2010-05-25 | Nishimatsu Construction Co., Ltd. | Equipment and method for removing nitrogen oxide |
| JP2007021499A (en) * | 2006-10-23 | 2007-02-01 | Nishimatsu Constr Co Ltd | Removal method of nitrogen oxide and removal apparatus of nitrogen oxide |
| JP2009285592A (en) * | 2008-05-30 | 2009-12-10 | Panasonic Corp | Denitrification apparatus |
| JP2012030199A (en) * | 2010-08-03 | 2012-02-16 | Japan Pionics Co Ltd | Method for treating gas containing nitrogen oxide |
| ITCE20110001A1 (en) * | 2011-02-02 | 2012-08-03 | Luigi Antonio Pezone | LOCAL URBAN LOCAL PURIFICATION PLANTS WITH CAPTURE AND NEUTRALIZATION OF CO2 AND SMOG |
| CN103007706A (en) * | 2012-12-17 | 2013-04-03 | 甘肃省交通科学研究院有限公司 | Air purifying device suitable for long and narrow underground cavity construction period and application method thereof |
| CN103007706B (en) * | 2012-12-17 | 2014-08-20 | 甘肃省交通科学研究院有限公司 | Air purifying device suitable for long and narrow underground cavity construction period and application method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0635721B2 (en) | 1994-05-11 |
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