JPH03233100A - Ventilating device for motorway tunnel - Google Patents
Ventilating device for motorway tunnelInfo
- Publication number
- JPH03233100A JPH03233100A JP2222037A JP22203790A JPH03233100A JP H03233100 A JPH03233100 A JP H03233100A JP 2222037 A JP2222037 A JP 2222037A JP 22203790 A JP22203790 A JP 22203790A JP H03233100 A JPH03233100 A JP H03233100A
- Authority
- JP
- Japan
- Prior art keywords
- tunnel
- harmful gas
- gas removal
- powder
- dust
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000428 dust Substances 0.000 claims abstract description 23
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 54
- 239000012717 electrostatic precipitator Substances 0.000 claims description 20
- 238000009423 ventilation Methods 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 239000004071 soot Substances 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 150000002736 metal compounds Chemical class 0.000 claims description 8
- 239000000843 powder Substances 0.000 abstract description 15
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 3
- -1 ferrous metal compound Chemical class 0.000 abstract description 2
- 239000011521 glass Substances 0.000 abstract description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001473 noxious effect Effects 0.000 abstract 4
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 6
- 239000011812 mixed powder Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910017464 nitrogen compound Inorganic materials 0.000 description 3
- 150000002830 nitrogen compounds Chemical class 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
Description
この発明は、自動車道トンネル内の空気を清浄化する自
動車道トンネル用換気設備に関する。The present invention relates to ventilation equipment for a highway tunnel that purifies the air inside the highway tunnel.
自動車道トンネル内の空気は、自動車から排出される煤
煙、自動車の走行に伴って生しるタイヤや道路アスファ
ルトの磨耗粉塵などによって汚染されている。そこで、
このような自動車道トンネルの車道空間に通じる通風路
（迂回すい道や天井通路など）内に電気集じん機を設置
し、トンネルから抽出した汚染空気を電気集しん機を通
過させて清浄化し、再びトンネル内に送気することによ
りトンネル内の見通しの改善を図った換気設備が開発さ
れている（特開昭６３−２４８４６０号公報参照）。The air inside expressway tunnels is contaminated by soot and smoke emitted from automobiles, and abrasion dust from tires and road asphalt generated as automobiles drive. Therefore,
An electrostatic precipitator is installed in the ventilation path (detour path, ceiling passage, etc.) that leads to the roadway space of such a highway tunnel, and the contaminated air extracted from the tunnel is passed through the electrostatic precipitator and purified. Ventilation equipment has been developed that aims to improve the visibility inside the tunnel by supplying air into the tunnel again (see Japanese Patent Laid-Open Publication No. 63-248460).
ところで周知の通り、電気集じん機は空気中のサブミク
ロンオーダの浮遊微粒子（煤じん）を捕集する機能を有
するものであるが、自動車からの排気物には煤じんの他
、Ｎｏ、、Ｓｏ、、Ｇｏなど対人かつ対電気設備的に有
害なガスが含まれている。したがって、上述した従来の
換気設備では、トンネル内空気中の煤じんば除去される
が上記有害ガスはそのままになっている。
一方、近未来の自動車道トンネルは都市郊外だけではな
く、都市近郊、特に地下に数多（建設されることが計画
されている。その場合、自動車道トンネル内の汚染空気
に含まれる上記有害ガスの影響が都市周辺に及ぶことが
考えられ、その処理が望まれるところとなる。
しかし、電気集じん機を設置した上記通風路とは別途に
、有害ガス除去機能を有する装置をトンンネル内に設け
ようとすると、他の通風路や排気口が必要となって設備
費や運転費が大幅に増え、またトンフルの場所によって
は必要な設備スペースの確保が困難になることも予想さ
れる。
そこで、この発明は、少ない費用と設置スペースでトン
ネル内汚染空気に含まれる煤じんと有害ガスの両方を合
理的に除去できる自動車道トンネル用換気設備を提供す
ることを目的とするものである。
また、有害ガスの除去手段に関しては、自動車などの移
動発生源や、発電所などの固定発生源から排気中の高濃
度の有害物を対象にして種々の酸化あるいは還元触媒が
開発されている。しかしながら、これらの触媒は比較的
高温度でのみその性能が発揮されるため使用コストが高
く、また環境中の低濃度の有害ガスの除去には考慮が払
われていない。
そこで、この発明は、トンネル内汚染空気から常温で効
率的に有害ガスを除去できる装置を備えた自動車道トン
ネル用換気設備を提供することを目的とするものである
。By the way, as is well known, electrostatic precipitators have the function of collecting submicron-order suspended particles (soot dust) in the air, but in addition to soot dust, there are also other types of exhaust from automobiles. Contains gases such as So, Go, etc. that are harmful to people and electrical equipment. Therefore, in the conventional ventilation equipment described above, soot and dust from the air inside the tunnel are removed, but the harmful gases are left as they are. On the other hand, many motorway tunnels in the near future are planned to be constructed not only in the suburbs of cities, but also in the suburbs, especially underground. It is thought that the effects of gas will be felt around the city, and it is desirable to deal with it. However, in addition to the above-mentioned ventilation duct where the electrostatic precipitator is installed, it is necessary to install a device with a harmful gas removal function inside the tunnel. If you try to do so, other ventilation channels and exhaust ports will be required, which will significantly increase equipment and operating costs, and depending on the location of the tunnel, it may be difficult to secure the necessary equipment space. The object of this invention is to provide ventilation equipment for motorway tunnels that can rationally remove both soot and harmful gases contained in polluted air inside tunnels with a small cost and installation space. Regarding means for removing harmful gases, various oxidation or reduction catalysts have been developed to target high concentrations of harmful substances in exhaust from mobile sources such as automobiles and stationary sources such as power plants.However, These catalysts exhibit their performance only at relatively high temperatures, making them expensive to use, and they do not take into consideration the removal of low concentrations of harmful gases from the environment. The object of the present invention is to provide ventilation equipment for highway tunnels equipped with a device that can efficiently remove harmful gases from contaminated air at room temperature.
【課題を解決するための手段］
上記目的を達成するために、この発明は、自動車道トン
ネルの車道空間から導かれた汚染空気の煤じんを除去す
る電気集じん機の後段に、煤しんを除去された前記汚染
空気から有害ガスを除去する有害ガス除去装置を配置す
るものとする。
また、上記有害ガス除去装置は、二酸化チタンと活性炭
との混合物、更にはこれに鉄系金属化合物を加えた混合
物と、これに波長が３００ ｎｍ以上の光を照射する光
源とからなるものとする。
（作 用］
この発明の換気設備はトンネル内汚染空気の煤じん除去
機能と有害ガス除去機能とを兼ね備えるものである。そ
の際、汚染空気の吸気口から見て電気集じん機の後段に
有害ガス除去装置を配置するものとする。これにより、
電気集じん機は有害ガス除去装置の存在にも関わらず、
本来の集じん作用を損なわれることな〈従来設備と同様
に稼働する。また、有害ガス除去装置は、煤じんが除去
された空気を対象に有害ガスだけを除去するという装置
固有の作用を果たすことができる。これらは同一の通風
路内に設置されるので、有害ガス除去装置の設置のため
の別途、もしくは特別の通風路や換気口を必要としない
。
有害ガスの除去については、環境中の低濃度のＮｏ、、
Ｓｏ、、Ｃｏなどを除去、吸着できる材料を種々検討し
、二酸化チタン（ＴｉＯｚ）と活性炭との混合物が、波
長が３００ ｎｍ以上の光（人工光でも太陽光でもよい
。）の照射があると室温でこれらのガスを高効率で除去
できることを見出し、更に上記混合物に鉄系金属化合物
、例えば三二酸化鉄（Ｆ ｅｇｏｓ ）を加えれば有害
ガス除去効果が一層大きくなることを見出した。
この発明に用いるＴｉｅ、は光触媒活性の高いアナター
ゼ型で比表面積の大きいものほどよく、活性炭も比表面
積の大きいものが望ましい。
ＴｉＯ□と活性炭との重量比は１対１以上（ＴｉＯ２の
方が重量が大きい）であれば効果が大きく、混合方法は
機械的あるいは化学的のいずれでもよい。
Ｔ ｉ Ｏ２及び活性炭に加えて鉄系金属化合物を混合
する場合の重量比はＴｉＯ□に対して数％以上あればよ
く、これら三者の混合方法は機械的あるいは化学的のい
ずれでもよい。
ここで、光照射はＴｉＯ□を活性化し、表面に生じる酸
化活性種によって有害ガスである窒素酸化物などを酸化
する作用があり、活性炭は生じた硝酸イオンなどの酸化
生成物を保持する役割を果たすものと考えられる。
更に、鉄系金属化合物は上記酸化生成物とイオン結合し
て窒素化合物（塩）などを生成するための正イオンを担
う元として働き、酸化生成物を化学的に捕捉して有害ガ
ス除去作用を一層高めるものと説明できる。この鉄系金
属化合物は特にＮＯに対して活性作用が大きい。鉄系金
属化合物を加えることにより、有害ガス低減効果はＴｉ
Ｏ□及び活性炭のみの場合に比べて約−桁以上大きくな
る。生じた窒素化合物などは活性炭により保持される。
使用後の混合物は水洗することにより付着した酸化生成
物や窒素化合物などを除去し、乾燥後に再び使用するこ
とが可能である。また、カートリッジ式に交換すること
も可能である。
【実施例】
それでは、図に基づいてこの発明の詳細な説明する。な
お、以下の各実施例において互いに対応する部分には同
一の符号を用いである。
第１図はこの発明の実施例の換気設備を備えた自動車道
トンネルの概略斜視図である。図において、１は自動車
道トンネル、２は自動車道トンネル１を迂回するすい道
で、ずい道２は自動車道トンネル１の側壁にあけられた
吸気口３及び排気口４を介して車道空間１ａに通じてい
る。
ずい道２の中央部には電気集じん機５が設置され、更に
その後段にダクト６を介して有害ガス除去装置７が配置
されている。電気集じん機５は帯電部５ａと集じん部５
ｂとからなり、これらは所定の処理風量を持つユニット
を複数基組み合わせて構成され、全体としてトンネル内
空気の処理に見合う容量を持つようになっている。
ずい道２は電気集じん５の前後で隔壁８及び９によりそ
れぞれ上下に仕切られており、通風路となる上部空間１
０及び１１にはそれぞれ送風機１２及び１３が設置され
、また下部空間１４及び１５は電気室及び補機室となっ
ている。送風機１２により、吸気口３から矢印で示すよ
うにずい道２内に吸引された車道空間１ａの汚染空気は
、電気集じん機５で煤しんが除去され、その後、有害ガ
ス除去装置７でＮｏＸ、Ｓｏ、 、Ｃｏなどが除去され
て、送風機１３により排気口４から車道空間１ａに戻さ
れる。
図示配置によれば、電気集じん機５は有害ガス除去装置
７と関係なく車道空間１ａの汚染空気から煤じんを除去
し、また有害ガス除去装置７は煤しんが除去された汚染
空気を対象として有害ガスのみを除去するという、それ
ぞれ固有の機能を互いに全うできる。
第２図は第１図のｎ−ｎ線に沿う拡大断面図である。電
気集しん機５の吸気側ダンパ）６を通して約７ｍ／秒の
風速で矢印の向きに導かれた汚染空気は、高電圧電源装
置１７から直流１１ＫＶの電圧が印加された帯電部５ａ
を通過する間に煤じん粒子に電荷が与えられ、更に前記
高電圧電源装置１７から直流５．５Ｋ Ｖの電圧が印加
された集じん部５ｂを通過する際に帯電粒子が集じん極
板に捕集される。煤じんを除去された汚染空気は、電気
集しん機５の排気側ダンパ１８を通してダクト６内に排
出される。テーパを有するダクト６は電気集じん５に接
続される左端は方形断面で、円筒状の有害ガス除去装置
７に接続される右端に向かって断面が徐々に円形に変化
している。
有害ガス除去装置７は円筒ケーシング１９の手前側（汚
染空気流入側）に補助送風機２０が納められ、その後方
に円筒ケーシング１９の中心軸に沿って、有害ガス除去
部となる反応管２１が配置されている。そして、反応管
２１を囲むように、円筒ケーシング１９の内周面に沿っ
て、光源２２が環状に多数配列されている。汚染空気ば
反応管２１と光源２２との間の環状空間２３を通して矢
印に示すように流れ、その間に有害ガスが反応管２１に
吸着される。
反応管２１はガラス管の外周面に接着剤を塗布し、その
上にサブミクロンオーダに粉砕したＴｉＯ□粉、活性戻
粉及びＦｅ、０３粉の混合粉をまぶすようにして付着さ
せて構成したものである。
光源２２は反応管２１上のＴｉＯ□を活性化するための
もので、例えば波長が３００〜４００ｎｍである近紫外
線、あるいは真空紫外線を発するものであればよく、ブ
ラックライトランプやハロゲンランプなどを使用するこ
とができる。光源２２の始動時には始動用パルス発生器
２４を介して数ＫＶの高電圧が印加されるが、この電力
は電気集じん機５に設備された高電圧発生装置１７から
供給されるので特別の高圧源は必要ない。
なお、電気集じん機５の集じん極板に堆積した煤じんば
、コンプレッサ２５で作られた圧縮空気をエアブロ−バ
ルブ２６から吹き付けることによりダスト排出プレナム
２７上に払い落とし、更にダスト分離回収装置２日に回
収する。また、有害ガスを吸着した反応管２１は、すで
に述べたように水洗により再生する。
第３図は有害ガス除去装置７の異なる実施例を示すため
の第２図と同様の断面図である。第３図においては、円
筒ケーシング１９の先端に有害ガス除去部となる円板状
のフィルタ２９が装着され、このフィルタ２９を照射す
る光源２２がその前方に環状に多数配列されている。フ
ィルタ２９は、活性炭フィルタ、例えば活性炭粉を配合
した樹脂からなる不織布の表面にＴｉ０ｚ粉及びＦｅｚ
Ｃ）＋粉の混合粉をまぶして捕捉させたもので、数ｍ／
Ｓ程度のガス流ではフィルタ面から粉粒が離脱しないこ
とを実験的に確認した。
更に、第４図〜第７図に有害ガス除去装置７の異なる実
施例を示す。
第４図は円筒ケーシング１９の中心軸に沿って光源２２
を配置し、その周囲にらせん状のじゃま板３０を設けた
もので、ケーシング１９の内周面及びじゃま板３０の表
面に接着剤を塗布し、その上にＴｉＯ□粉、活性炭粉及
びＦｅ、Ｏ，粉の混合粉をまぶすようにして付着させで
ある。このようにじゃま板３０を設けることにより、矢
印で示すように流れる有害ガスと上記混合粉との接触時
間が長くなり、有害ガス除去効果が大幅に向上する。
第５図は第４図のらせん状のじゃま板３０に替えて、有
害ガスの流れに垂直な円板状のしやま板３０を光＃ｉ２
２の前後及び中間の３箇所に設けたもので、有害ガスは
じゃま板３０により矢印で示すように拡げられ、ケーシ
ング１９の内周面との接触がよくなる。ケーシング１９
の内周面及びじゃま＋７ｉ３０の表面には、第４図の場
合と同様にＴｉＯ２粉、活性炭粉及びＦｅ、Ｏ，粉の混
合粉をまぶすようにして付着させである。
第６図はケーシング１９の中心軸に沿って配置した光源
２２の外側に同心的に円筒状のフィルタ２９を配置し、
その前後を閉塞板３１及び３２で塞いで、ケーシング１
９に流入した有害ガスがフィルタ２９を経て流出するよ
うにしたもので、−層のフィルタ２９で大きな有効面積
が得られる。
フィルタ２９は第３図の場合と同様、活性炭フィルタに
Ｔ ｉ Ｏｚ粉及びＦｅｚＯｔ粉の混合粉をまぶしたも
のである。
第７図は第６図におけるフィルタ２９を有害ガスの流れ
に対して垂直に、前後３箇所に設けたもので、この場合
も第６図の構成と同等の効果が得られることを実験で確
認した。[Means for Solving the Problems] In order to achieve the above object, the present invention installs soot dust at the rear stage of an electrostatic precipitator that removes soot dust from contaminated air led from the roadway space of an expressway tunnel. A harmful gas removal device shall be provided to remove harmful gas from the removed contaminated air. In addition, the above-mentioned harmful gas removal device shall consist of a mixture of titanium dioxide and activated carbon, a mixture in which an iron-based metal compound is added, and a light source that irradiates this with light having a wavelength of 300 nm or more. . (Function) The ventilation equipment of the present invention has both the function of removing soot and dust from the contaminated air inside the tunnel and the function of removing harmful gases. A gas removal device shall be provided, which will:
Despite the existence of harmful gas removal equipment, electrostatic precipitators
The original dust collection function is not impaired and it operates in the same way as conventional equipment. Further, the harmful gas removal device can perform the function unique to the device of removing only harmful gas from the air from which soot and dust have been removed. Since these are installed in the same ventilation path, there is no need for a separate or special ventilation path or ventilation opening for the installation of the harmful gas removal device. Regarding the removal of harmful gases, low concentration No.
We investigated various materials that can remove and adsorb So, Co, etc., and found that when a mixture of titanium dioxide (TiOz) and activated carbon is irradiated with light with a wavelength of 300 nm or more (artificial light or sunlight may be used). It has been found that these gases can be removed with high efficiency at room temperature, and that the harmful gas removal effect can be further enhanced by adding an iron-based metal compound, such as iron sesquioxide (Fegos), to the above mixture. The Tie used in this invention is an anatase type with high photocatalytic activity, and the larger the specific surface area, the better, and the activated carbon is also preferably one with a larger specific surface area. If the weight ratio of TiO□ and activated carbon is 1:1 or more (TiO2 is heavier), the effect will be greater, and the mixing method may be either mechanical or chemical. When an iron-based metal compound is mixed in addition to T i O2 and activated carbon, the weight ratio may be at least several percent to TiO□, and the method for mixing these three may be either mechanical or chemical. Here, the light irradiation activates TiO□, and the oxidizing active species generated on the surface have the effect of oxidizing harmful gases such as nitrogen oxides, and activated carbon plays the role of retaining the generated oxidation products such as nitrate ions. It is believed that this will be fulfilled. Furthermore, the iron-based metal compound acts as a source of positive ions to form nitrogen compounds (salts) by ionically bonding with the above oxidation products, and chemically captures the oxidation products to remove harmful gases. It can be explained as something that will further enhance the situation. This iron-based metal compound has a particularly strong active effect on NO. By adding iron-based metal compounds, the effect of reducing harmful gases is greater than that of Ti.
It is about -0.5 times larger than the case of only O□ and activated carbon. The generated nitrogen compounds are retained by activated carbon. After use, the mixture can be washed with water to remove attached oxidation products, nitrogen compounds, etc., and can be used again after drying. It is also possible to replace it with a cartridge type. [Example] The present invention will now be described in detail based on the drawings. In each of the following embodiments, the same reference numerals are used for corresponding parts. FIG. 1 is a schematic perspective view of a motorway tunnel equipped with ventilation equipment according to an embodiment of the present invention. In the figure, 1 is an expressway tunnel, 2 is a path that detours around the expressway tunnel 1, and the tunnel 2 connects to the roadway space 1a through an intake port 3 and an exhaust port 4 made in the side wall of the expressway tunnel 1. I understand. An electrostatic precipitator 5 is installed in the center of the tunnel 2, and a harmful gas removal device 7 is installed downstream via a duct 6. The electrostatic precipitator 5 includes a charging section 5a and a dust collecting section 5.
These are constructed by combining a plurality of units each having a predetermined processing air volume, and as a whole have a capacity suitable for processing the air in the tunnel. The channel 2 is partitioned vertically by partition walls 8 and 9 before and after the electrostatic precipitator 5, and an upper space 1 serving as a ventilation channel is formed.
Air blowers 12 and 13 are installed in spaces 0 and 11, respectively, and lower spaces 14 and 15 serve as an electrical room and an auxiliary equipment room. The polluted air in the roadway space 1a that is sucked into the tunnel 2 from the air inlet 3 by the blower 12 as shown by the arrow is removed with soot by an electrostatic precipitator 5, and then converted into Nox by a harmful gas removal device 7. , So, , Co, etc. are removed and returned to the roadway space 1a from the exhaust port 4 by the blower 13. According to the illustrated arrangement, the electrostatic precipitator 5 removes soot and dust from the contaminated air in the roadway space 1a independently of the harmful gas removal device 7, and the harmful gas removal device 7 targets the contaminated air from which the soot has been removed. They can each fulfill their unique functions of removing only harmful gases. FIG. 2 is an enlarged sectional view taken along line nn in FIG. 1. The contaminated air that is guided in the direction of the arrow at a wind speed of approximately 7 m/sec through the intake damper 6 of the electric concentrator 5 is transferred to the charged part 5a to which a voltage of 11 KV DC is applied from the high voltage power supply 17.
The charged particles are charged with a charge while passing through the dust collecting section 5b, to which a DC voltage of 5.5 KV is applied from the high voltage power supply 17. be captured. The contaminated air from which soot and dust have been removed is discharged into the duct 6 through the exhaust side damper 18 of the electric precipitator 5. The tapered duct 6 has a rectangular cross section at the left end connected to the electrostatic precipitator 5, and gradually changes into a circular cross section toward the right end connected to the cylindrical noxious gas removal device 7. In the harmful gas removal device 7, an auxiliary blower 20 is housed in the front side (contaminated air inflow side) of a cylindrical casing 19, and a reaction tube 21 serving as a harmful gas removal section is arranged behind it along the central axis of the cylindrical casing 19. has been done. A large number of light sources 22 are arranged in an annular manner along the inner peripheral surface of the cylindrical casing 19 so as to surround the reaction tube 21 . Contaminated air flows through the annular space 23 between the reaction tube 21 and the light source 22 as shown by the arrow, during which harmful gases are adsorbed by the reaction tube 21. The reaction tube 21 was constructed by applying an adhesive to the outer circumferential surface of a glass tube, and then sprinkling and adhering a mixed powder of TiO□ powder crushed to submicron order, activated return powder, and Fe, 03 powder onto the adhesive. It is something. The light source 22 is for activating the TiO□ on the reaction tube 21, and may be anything that emits near ultraviolet light or vacuum ultraviolet light with a wavelength of 300 to 400 nm, such as a black light lamp or a halogen lamp. can do. When starting the light source 22, a high voltage of several KV is applied via the starting pulse generator 24, but this power is supplied from the high voltage generator 17 installed in the electrostatic precipitator 5, so a special high voltage is applied. No source needed. The soot and dust deposited on the dust collection plate of the electrostatic precipitator 5 is blown off onto the dust discharge plenum 27 by blowing compressed air produced by the compressor 25 from the air blow valve 26, and is further removed by the dust separation and recovery device. Collect on the 2nd. Further, the reaction tube 21 that has adsorbed harmful gases is regenerated by washing with water, as described above. FIG. 3 is a sectional view similar to FIG. 2, showing a different embodiment of the harmful gas removal device 7. In FIG. 3, a disk-shaped filter 29 serving as a harmful gas removal section is attached to the tip of the cylindrical casing 19, and a large number of light sources 22 for illuminating this filter 29 are arranged in a ring shape in front of it. The filter 29 is an activated carbon filter, for example, a nonwoven fabric made of resin mixed with activated carbon powder, and TiOz powder and Fez powder on the surface of the nonwoven fabric.
C) + powder mixed powder is sprinkled and captured, several meters/
It was experimentally confirmed that powder particles do not separate from the filter surface in a gas flow of about S. Furthermore, different embodiments of the harmful gas removal device 7 are shown in FIGS. 4 to 7. FIG. 4 shows the light source 22 along the central axis of the cylindrical casing 19.
is arranged, and a spiral baffle plate 30 is provided around it. Adhesive is applied to the inner peripheral surface of the casing 19 and the surface of the baffle plate 30, and TiO□ powder, activated carbon powder, Fe, O. Apply the powder mixture by sprinkling it. By providing the baffle plate 30 in this manner, the contact time between the harmful gas flowing as shown by the arrow and the mixed powder is increased, and the harmful gas removal effect is greatly improved. In FIG. 5, instead of the spiral baffle plate 30 in FIG. 4, a disc-shaped baffle plate 30 perpendicular to the flow of harmful gas is used for light
2, the harmful gas is spread as shown by the arrow by the baffle plate 30, and contact with the inner circumferential surface of the casing 19 is improved. Casing 19
As in the case of FIG. 4, TiO2 powder, activated carbon powder, and a mixed powder of Fe, O, and powder are sprinkled on the inner circumferential surface of the inner peripheral surface and the surface of the baffle +7i30. In FIG. 6, a cylindrical filter 29 is arranged concentrically outside a light source 22 arranged along the central axis of the casing 19,
The front and back of the casing 1 are closed with closing plates 31 and 32.
The harmful gas flowing into the filter 9 flows out through the filter 29, and the -layer filter 29 provides a large effective area. The filter 29 is an activated carbon filter sprinkled with a mixed powder of T i Oz powder and FezOt powder, as in the case of FIG. 3 . Figure 7 shows a configuration in which the filter 29 in Figure 6 is installed perpendicularly to the flow of harmful gas at three locations, front and back, and it has been confirmed through experiments that the same effect as the configuration shown in Figure 6 can be obtained in this case as well. did.
二の発明によれば、電気集じん機の後段に有害ガス除去
装置を配置することにより、単に電気集じん機を備えた
ものに比して特別の設備やずい道を設けることなく、自
動車道トンネル内の汚染空気から煤じんとＮＯ，、Ｓｏ
Ｘ、Ｇｏなどの有害ガスの両方を除去する機能を備えた
換気設備を実現することができる。また、二酸化チタン
と活性炭との混合物、更にはこれに鉄系金属化合物を加
えた混合物と、これに光を照射する光源とで上記有害ガ
ス除去装置を構成することにより、簡単な構成で優れた
有害ガス除去機能を得ることができる。According to the second invention, by arranging the harmful gas removal device after the electrostatic precipitator, it is possible to remove the harmful gas from the motorway without the need for special equipment or tunnels compared to a device simply equipped with an electrostatic precipitator. Soot and NO, So from the polluted air inside the tunnel
It is possible to realize ventilation equipment that has the function of removing both harmful gases such as X and Go. In addition, by configuring the above-mentioned harmful gas removal device with a mixture of titanium dioxide and activated carbon, a mixture in which an iron-based metal compound is added, and a light source that irradiates the mixture with light, it is possible to achieve an excellent and simple structure. A harmful gas removal function can be obtained.
図はこの発明の実施例を示し、第１図はこの発明の換気
設備を備えた自動車道トンネルの概略斜視図、第２図は
第１図の■−■線に沿う拡大断面図、第３図は有害ガス
除去装置の異なる実施例を示す第２図に相当する図、第
４図〜第７図はいずれも有害ガス除去装置の更に異なる
実施例を示す拡大縦断面図である。
１・・・自動車道トンネル、１ａ
ずい道、５・・・電気集じん機、７
置、１２．１３・・・送風機、１７
２１・・・反応管、２２山光源、２
０・・・じゃま板。
・・・車道空間、２・・・
・・・有害ガス除去装
・・・高電圧発生装置、
９・・・フィルタ、３
第
図
第
図The figures show an embodiment of the present invention, in which Fig. 1 is a schematic perspective view of a motorway tunnel equipped with ventilation equipment of the invention, Fig. 2 is an enlarged sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is an enlarged sectional view taken along the line This figure corresponds to FIG. 2 showing a different embodiment of the harmful gas removal device, and each of FIGS. 4 to 7 is an enlarged longitudinal sectional view showing still another embodiment of the harmful gas removal device. 1... Expressway tunnel, 1a Channel, 5... Electrostatic precipitator, 7 Placement, 12.13... Blower, 17 21... Reaction tube, 22 Mountain light source, 2 0... Obstruction Board. ...Roadway space, 2...Harmful gas removal equipment...High voltage generator, 9...Filter, 3 Fig. Fig.
Claims (1)
の煤じんを除去する電気集じん機と、この電機集じん機
の後段に配置され煤じんを除去された前記汚染空気から
有害ガスを除去する有害ガス除去装置とを備えたことを
特徴とする自動車道トンネル用換気設備。 ２）有害ガス除去装置は二酸化チタンと活性炭との混合
物と、これに波長が３００ｎｍ以上の光を照射する光源
とからなることを特徴とする請求項１記載の自動車道ト
ンネル用換気設備。 ３）有害ガス除去装置は二酸化チタン、活性炭及び鉄系
金属化合物の混合物と、これに波長が３００ｎｍ以上の
光を照射する光源とからなることを特徴とする請求項１
記載の自動車道トンネル用換気設備。[Scope of Claims] 1) An electrostatic precipitator that removes soot and dust from contaminated air led from the roadway space of an expressway tunnel, and an electrostatic precipitator that removes soot and dust that is disposed after the electrostatic precipitator. Ventilation equipment for a highway tunnel, characterized by comprising a harmful gas removal device that removes harmful gases from the air. 2) The ventilation equipment for a motorway tunnel according to claim 1, wherein the harmful gas removal device comprises a mixture of titanium dioxide and activated carbon, and a light source that irradiates the mixture with light having a wavelength of 300 nm or more. 3) Claim 1, wherein the harmful gas removal device comprises a mixture of titanium dioxide, activated carbon, and an iron-based metal compound, and a light source that irradiates the mixture with light having a wavelength of 300 nm or more.
Ventilation equipment for motorway tunnels as described.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21775889 | 1989-08-24 | ||
| JP1-217758 | 1989-08-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03233100A true JPH03233100A (en) | 1991-10-17 |
| JP2564421B2 JP2564421B2 (en) | 1996-12-18 |
Family
ID=16709282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22203790A Expired - Lifetime JP2564421B2 (en) | 1989-08-24 | 1990-08-23 | Ventilation equipment for road tunnels |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2564421B2 (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05337337A (en) * | 1991-12-21 | 1993-12-21 | Franz D Oeste | Purifying method of gas, exhaust gas, vapor and sol and apparatus therefor |
| EP0591920A2 (en) * | 1992-10-06 | 1994-04-13 | Fuji Electric Co., Ltd. | Method and apparatus for removing harmful gas |
| EP0614682A1 (en) * | 1993-03-11 | 1994-09-14 | Fuji Electric Co., Ltd. | Method for removing pollutants and purifying materials |
| EP0627253A1 (en) * | 1993-05-28 | 1994-12-07 | Matsushita Electric Industrial Co., Ltd. | Denitrification system |
| EP0634953A1 (en) * | 1992-12-11 | 1995-01-25 | Wisconsin Alumni Research Foundation | Gas phase degradation of organic compounds |
| US5593737A (en) * | 1995-05-23 | 1997-01-14 | United Technologies Corporation | Photocatalytic semiconductor coating process |
| US5759948A (en) * | 1994-02-07 | 1998-06-02 | Ishihara Sangyo Kaisha Ltd. | Titanium oxide for photocatalyst and method of producing the same |
| US5865959A (en) * | 1995-05-23 | 1999-02-02 | United Technologies Corporation | Back-side illuminated organic pollutant removal system |
| US6277346B1 (en) | 1993-06-28 | 2001-08-21 | Ishihara Sangyo Kaisha, Ltd. | Photocatalyst composite and process for producing the same |
| JP2005095722A (en) * | 2003-09-22 | 2005-04-14 | Foresty Minegishi:Kk | Biscuit formed with two or more porous clay and titanium dioxide |
| JP2006150208A (en) * | 2004-11-29 | 2006-06-15 | Mitsubishi Heavy Ind Ltd | Air cleaning apparatus |
| JP2009039639A (en) * | 2007-08-08 | 2009-02-26 | Panasonic Corp | Electric dust collection system |
| JP2010075916A (en) * | 2008-08-29 | 2010-04-08 | Meidensha Corp | Ozone decomposing device and process system |
| WO2011113408A3 (en) * | 2010-03-19 | 2012-06-28 | Cft Gmbh Compact Filter Technic | Method for minimizing nitrogen oxide gases in underground mining and tunnel construction |
| CN105233688A (en) * | 2015-11-03 | 2016-01-13 | 浙江海洋学院 | Ventilating and purifying structure of tunnel and ventilating and purifying method thereof |
| CN105268317A (en) * | 2015-11-03 | 2016-01-27 | 舟山市智海技术开发有限公司 | Tunnel air ventilation and purification structure and air ventilation and purification method thereof |
| WO2016207462A1 (en) * | 2015-06-22 | 2016-12-29 | Consejo Superior De Investigaciones Científicas (Csic) | Photocatalytic device for a motor vehicle exhaust pipe |
| CN111828077A (en) * | 2020-07-30 | 2020-10-27 | 山东宝成制冷设备有限公司 | Cooling, dehumidifying and dust-settling equipment for tunnel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05337337A (en) * | 1991-12-21 | 1993-12-21 | Franz D Oeste | Purifying method of gas, exhaust gas, vapor and sol and apparatus therefor |
| US5909613A (en) * | 1992-10-06 | 1999-06-01 | Fuji Electric Co., Ltd. | Apparatus for removing harmful gas |
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| EP0591920A3 (en) * | 1992-10-06 | 1994-04-20 | Fuji Electric Co Ltd | |
| EP0634953A1 (en) * | 1992-12-11 | 1995-01-25 | Wisconsin Alumni Research Foundation | Gas phase degradation of organic compounds |
| EP0634953A4 (en) * | 1992-12-11 | 1995-03-15 | Wisconsin Alumni Res Found | Gas phase degradation of organic compounds. |
| EP0614682A1 (en) * | 1993-03-11 | 1994-09-14 | Fuji Electric Co., Ltd. | Method for removing pollutants and purifying materials |
| EP0627253A1 (en) * | 1993-05-28 | 1994-12-07 | Matsushita Electric Industrial Co., Ltd. | Denitrification system |
| US5492676A (en) * | 1993-05-28 | 1996-02-20 | Matsushita Electric Industrial Co., Ltd. | Denitrification system |
| US6277346B1 (en) | 1993-06-28 | 2001-08-21 | Ishihara Sangyo Kaisha, Ltd. | Photocatalyst composite and process for producing the same |
| US6498000B2 (en) | 1993-06-28 | 2002-12-24 | Ishihara Sangyo Kaisha, Ltd. | Photocatalyst composite and process for producing the same |
| US5759948A (en) * | 1994-02-07 | 1998-06-02 | Ishihara Sangyo Kaisha Ltd. | Titanium oxide for photocatalyst and method of producing the same |
| US5865959A (en) * | 1995-05-23 | 1999-02-02 | United Technologies Corporation | Back-side illuminated organic pollutant removal system |
| US5593737A (en) * | 1995-05-23 | 1997-01-14 | United Technologies Corporation | Photocatalytic semiconductor coating process |
| JP2005095722A (en) * | 2003-09-22 | 2005-04-14 | Foresty Minegishi:Kk | Biscuit formed with two or more porous clay and titanium dioxide |
| JP4564733B2 (en) * | 2003-09-22 | 2010-10-20 | 株式会社フォレスティ峯岸 | Unglazed made of multiple porous clays and titanium dioxide |
| JP4531536B2 (en) * | 2004-11-29 | 2010-08-25 | 三菱重工メカトロシステムズ株式会社 | Air purification device |
| JP2006150208A (en) * | 2004-11-29 | 2006-06-15 | Mitsubishi Heavy Ind Ltd | Air cleaning apparatus |
| JP2009039639A (en) * | 2007-08-08 | 2009-02-26 | Panasonic Corp | Electric dust collection system |
| JP2010075916A (en) * | 2008-08-29 | 2010-04-08 | Meidensha Corp | Ozone decomposing device and process system |
| WO2011113408A3 (en) * | 2010-03-19 | 2012-06-28 | Cft Gmbh Compact Filter Technic | Method for minimizing nitrogen oxide gases in underground mining and tunnel construction |
| EA023474B1 (en) * | 2010-03-19 | 2016-06-30 | Кфт Гмбх Компект Филтер Текник | Method for minimizing concentration of nitrogen oxide gases in underground mining and system therefor |
| WO2016207462A1 (en) * | 2015-06-22 | 2016-12-29 | Consejo Superior De Investigaciones Científicas (Csic) | Photocatalytic device for a motor vehicle exhaust pipe |
| CN105233688A (en) * | 2015-11-03 | 2016-01-13 | 浙江海洋学院 | Ventilating and purifying structure of tunnel and ventilating and purifying method thereof |
| CN105268317A (en) * | 2015-11-03 | 2016-01-27 | 舟山市智海技术开发有限公司 | Tunnel air ventilation and purification structure and air ventilation and purification method thereof |
| CN111828077A (en) * | 2020-07-30 | 2020-10-27 | 山东宝成制冷设备有限公司 | Cooling, dehumidifying and dust-settling equipment for tunnel |
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|---|---|
| JP2564421B2 (en) | 1996-12-18 |
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