JPS63212713A - Device for removing graphite in exhaust gas of internal combustion engine - Google Patents
Device for removing graphite in exhaust gas of internal combustion engineInfo
- Publication number
- JPS63212713A JPS63212713A JP63006052A JP605288A JPS63212713A JP S63212713 A JPS63212713 A JP S63212713A JP 63006052 A JP63006052 A JP 63006052A JP 605288 A JP605288 A JP 605288A JP S63212713 A JPS63212713 A JP S63212713A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- black smoke
- exhaust gas
- graphite
- auxiliary fuel
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 9
- 239000010439 graphite Substances 0.000 title claims abstract description 9
- 239000000446 fuel Substances 0.000 claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 230000003197 catalytic effect Effects 0.000 claims abstract description 12
- 230000003647 oxidation Effects 0.000 claims abstract description 9
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 239000000779 smoke Substances 0.000 claims description 66
- 239000003054 catalyst Substances 0.000 claims description 31
- 150000002736 metal compounds Chemical class 0.000 claims description 21
- 239000002828 fuel tank Substances 0.000 abstract description 5
- 229910000765 intermetallic Inorganic materials 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 35
- 239000000243 solution Substances 0.000 description 22
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000007809 chemical reaction catalyst Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、内燃機関の排ガス中に含まれる黒煙を除去す
る装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for removing black smoke contained in exhaust gas of an internal combustion engine.
内燃機関のうち、特にディーゼル機関等の黒煙を含む排
ガスを発生するものにおいては、黒煙の除去を含めた排
ガスの浄化手段を設けることが要求されている。周知の
ように、気体中に分散された微粒子を除去する手段とし
ては、サイクロンによる捕集、水による洗浄、電気集塵
、フィルタによる捕集等があるが、黒煙に対しては、特
ζこフィルタによる口過形式が除去効率が高い点で育効
である。BACKGROUND OF THE INVENTION Among internal combustion engines, especially those that generate exhaust gas containing black smoke, such as diesel engines, it is required to provide means for purifying the exhaust gas, including the removal of black smoke. As is well known, methods for removing fine particles dispersed in gas include collection using cyclones, washing with water, electrostatic precipitation, and collection using filters. The mouth-filtering method using this filter is effective in terms of its high removal efficiency.
ところで、排ガス中の黒煙の捕集にフィルタを用いると
、ディーゼル機関のように黒煙発生量が比較的多いもの
に適用した場合に、比較的短時間でフィルタが目詰りを
起こして運転が困難または不可能になる。そのため、こ
のため、フィルタ式の黒煙除去装置では、適宜フィルタ
の交換やフィルタの清掃を行なっているが、その都度、
機関を停止しなければらなず、更には捕集黒煙の後処理
が必要であり、実用上の不便が多いという問題があった
。By the way, if a filter is used to collect black smoke in exhaust gas, and it is applied to an engine that generates a relatively large amount of black smoke, such as a diesel engine, the filter will become clogged in a relatively short period of time and operation will be interrupted. become difficult or impossible. Therefore, in filter-type black smoke removal devices, the filters are replaced and cleaned as appropriate, but each time,
The problem is that the engine has to be stopped, and furthermore, the collected black smoke needs to be processed after treatment, which causes many practical inconveniences.
これに対して、耐熱性のフィルタを用い、フィルタに捕
集された黒煙をバーナで加熱して燃焼させることにより
、フィルタの再生を行なうようにした黒煙除去装置が知
られている。このような装置によれば、内燃機関の連続
運転が可能となるうえ、黒煙の後処理が不要となるとい
う利点が得られる。しかしながら、このような装置は、
排熱回収を行なわない限り、大気中への熱放出量が多く
、このため例えばディーゼル自動車や、トンネル工事等
の閉処空間で使われる建設機械等には不適当であり、更
には、処理時にフィルタが高温度に加熱されるため、特
に黒煙負荷が大きい場合に、フィルタが煩雑に加熱と冷
却を繰り返されて寿命が短かくなる場合があった。On the other hand, a black smoke removal device is known that uses a heat-resistant filter and regenerates the filter by heating and burning the black smoke collected by the filter with a burner. Such a device has the advantage that continuous operation of the internal combustion engine is possible and that no after-treatment of black smoke is required. However, such devices
Unless exhaust heat is recovered, a large amount of heat will be released into the atmosphere, making it unsuitable for example for diesel vehicles or construction machinery used in confined spaces such as tunnel construction. Since the filter is heated to a high temperature, especially when the black smoke load is large, the filter may be repeatedly heated and cooled in a complicated manner, resulting in a shortened service life.
本発明は、上記の問題を解消するためになされたもので
、内燃機関を運転しつつ、フィルタに捕集された黒煙の
除去が可能であるのは無論、排ガス温度が低い場合にも
黒煙の除去を行うことができ、かつ捕集黒煙の後処理が
不要で、加えては、フィルタの加熱温度を極力低く抑え
ることができる黒煙除去装置を提供することを目的とす
るものである。The present invention was made to solve the above problem, and it is possible to remove the black smoke collected in the filter while operating the internal combustion engine, and it is also possible to remove the black smoke even when the exhaust gas temperature is low. The object of the present invention is to provide a black smoke removal device that can remove smoke, does not require post-processing of the collected black smoke, and can further keep the heating temperature of the filter as low as possible. be.
本発明は、内燃機関の排気系管路内に黒鉛を除去するた
めの黒鉛補集フィルタが設置されてなる内燃機関の排ガ
ス中の黒煙除去装置において、前記排気系管路の前記フ
ィルタより上流側に、黒煙に対して酸化触媒作用を有す
る金属化合物の溶液を前記フィルタの黒煙補集量に基づ
いて排ガス中に分散させる触媒添加手段と、排ガス温度
に基づいて、前記触媒添加手段に補助燃料を供給する補
助燃料添加手段とを設けたことを特徴としており、さら
に、前記触媒添加手段と前記フィルタとの間に、前記補
助燃料を燃焼させるための着火手段を備えたものを含む
ものである。The present invention provides a device for removing black smoke from exhaust gas of an internal combustion engine, in which a graphite collection filter for removing graphite is installed in an exhaust system pipe of an internal combustion engine, which is provided upstream of the filter in the exhaust system pipe. a catalyst addition means for dispersing a solution of a metal compound having an oxidation catalytic effect on black smoke into the exhaust gas based on the amount of black smoke collected by the filter; An auxiliary fuel addition means for supplying auxiliary fuel is provided, and an ignition means for combusting the auxiliary fuel is further provided between the catalyst addition means and the filter. .
フィルタに補集された黒煙量に基づいて、触媒添加手段
から排ガス中に、黒煙に対して酸化触媒作用を有する金
属化合物の溶液が分散され、フィルタに補集された黒煙
は、平常の黒煙粒子の着火温度より低温度にて酸化、除
去される。その際、排ガス温度が、触媒（金属化合物の
溶液）が作用する温度にまで充分に高くない場合には、
その触媒とともに補助燃料が排ガス中に混入され、この
補助燃料の燃焼による熱により、前記触媒の触媒作用が
発揮される。Based on the amount of black smoke collected by the filter, a solution of a metal compound having an oxidation catalytic effect on black smoke is dispersed into the exhaust gas from the catalyst addition means, and the black smoke collected by the filter is is oxidized and removed at a temperature lower than the ignition temperature of black smoke particles. At that time, if the exhaust gas temperature is not high enough for the catalyst (metal compound solution) to act,
The auxiliary fuel is mixed into the exhaust gas together with the catalyst, and the catalytic action of the catalyst is exerted by the heat generated by combustion of the auxiliary fuel.
以下、本発明の実施例を図面を参照しながら説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は、本発明の第１の実施例を示す図であって、図
中符号１は、排気系管路の途中または終端部に構成され
たフィルタチャンバである。このフィルタチャンバ１の
内部には、耐熱性のフィルタ２が内臓されている。また
、チャンバＩの導入口部１ａは、図示しない内燃機関の
排気管に連結されている。一方チャンバ１の排出口部１
ｂは、大気中に向けて開放されるか、あるいは必要に応
じて排ガス中のＣｏ、ＨＣ，ＮＯＸ等を処理するための
触媒コンバータに連結されている。前記フィルタチャン
バ１内における前記フィルタ２の上流側には、排ガス中
に金属化合物の溶液を分散させるためのノズル３が設置
されている。このノズル３は、電磁弁４を介して触媒タ
ンク５に連結されている。触媒タンク５内部には、黒煙
（カーボン粒子）に対して酸化・触媒作用を有する金属
化合物の溶液が収容されている。前記チャンバＩには、
フィルタ２の上流側と下流側とに、フィルタ２による圧
力損失を検出するための圧力検出端６ ａ、 ６ ｂが
設けられている。これらの圧力検出端６ ａ、 ６ ｂ
は、差圧検出器７（差圧検出手段）に接続されており、
この差圧検出器７は、前記フィルタ２の上流と下流の圧
力の差圧に基づいて、フィルタ２の黒煙捕集量を検知す
るようになっている。そして差圧検知７の圧力は、前記
電磁弁４に供給され、フィルタ２の黒煙捕集量があらか
じめ設定された所定値以上になると、電磁弁４が開放さ
れて金属化合物（＠媒）の溶液が排ガス中に分散される
ようになっている。FIG. 1 is a diagram showing a first embodiment of the present invention, and reference numeral 1 in the figure indicates a filter chamber constructed in the middle or at the end of an exhaust system pipe line. A heat-resistant filter 2 is housed inside the filter chamber 1 . Further, the introduction port 1a of the chamber I is connected to an exhaust pipe of an internal combustion engine (not shown). On the other hand, the outlet part 1 of the chamber 1
b is open to the atmosphere, or connected to a catalytic converter for treating Co, HC, NOX, etc. in exhaust gas as necessary. A nozzle 3 is installed upstream of the filter 2 in the filter chamber 1 for dispersing a metal compound solution into the exhaust gas. This nozzle 3 is connected to a catalyst tank 5 via a solenoid valve 4. Inside the catalyst tank 5, a solution of a metal compound having an oxidizing and catalytic effect on black smoke (carbon particles) is stored. In the chamber I,
Pressure detection ends 6 a and 6 b for detecting pressure loss due to the filter 2 are provided on the upstream and downstream sides of the filter 2 . These pressure detection ends 6a, 6b
is connected to the differential pressure detector 7 (differential pressure detection means),
The differential pressure detector 7 detects the amount of black smoke collected by the filter 2 based on the differential pressure between the upstream and downstream pressures of the filter 2. The pressure of the differential pressure detection 7 is supplied to the solenoid valve 4, and when the amount of black smoke collected by the filter 2 exceeds a preset value, the solenoid valve 4 is opened and the metal compound (@medium) is removed. The solution is adapted to be dispersed in the exhaust gas.
また、符号１２は燃料タンクで、該燃料タンク１２から
の供給管１３が電磁弁４で金属化合物の溶液の配管に連
結され、金属化合物の溶液と同時に補助燃料（例えば軽
油）が供給されるようになっている。供給管１３の途中
にはもう一つの電磁弁４ａが介在されており、該電磁弁
４ａは、チャンバ１内部のフィルタ２の前段に設けられ
た温度検出素子Ｔによる排ガス温度の検出信号に基づき
、その開閉が制御されるようになっている。すなわち、
燃料タンクＩ２内の補助燃料は、双方の電磁弁４．４ａ
が開いた時のみノズル３から放出されようになっている
わけである。Reference numeral 12 denotes a fuel tank, and a supply pipe 13 from the fuel tank 12 is connected to a metal compound solution pipe by a solenoid valve 4, so that auxiliary fuel (for example, light oil) is supplied at the same time as the metal compound solution. It has become. Another solenoid valve 4a is interposed in the middle of the supply pipe 13, and this solenoid valve 4a detects the exhaust gas temperature based on the exhaust gas temperature detection signal from the temperature detection element T provided before the filter 2 inside the chamber 1. Its opening and closing are controlled. That is,
The auxiliary fuel in the fuel tank I2 is supplied to both solenoid valves 4.4a.
It is designed to be ejected from the nozzle 3 only when the is opened.
さらに、本実施例のものでは、前記ノズル３よりも下流
でｍｌ記フィルタ２の直肪に、電気的に過熱される金網
１５（着火手段）が設けられた構造となっている。Further, in this embodiment, a wire mesh 15 (ignition means) which is electrically heated is provided in the direct fat of the filter 2 downstream of the nozzle 3.
上記の黒煙除去装置について更に詳しく説明する。The above black smoke removal device will be explained in more detail.
本発明に使用できるフィルタとしては、耐熱性を有し、
かつ黒煙を捕集可能なものであればよく、セラミック、
ガラス繊維、炭素繊維、金属ｆ＆維、金属焼結体等から
なる周知の種々のフィルタが適用できる。また、金属化
合物としては、黒煙をその着火温度（通常６５０で面後
）より低い温度で酸化反応を起こさ仕ることカイできる
酸化反応触媒であればよく、例えば白金やパラジウム等
の貴金属系の金属化合物、銅やニッケル等の非貴金属系
の金属化合物などをあげることができる。なお、本発明
者等は、上記の触媒のうち、Ｐｄの化合物が３５０℃程
度の最も低い温度で黒煙を酸化、除去することができる
ことを実験により確認した。The filter that can be used in the present invention has heat resistance,
Any material that can collect black smoke is fine, such as ceramic,
Various well-known filters made of glass fiber, carbon fiber, metal f&fiber, metal sintered body, etc. can be applied. The metal compound may be any oxidation reaction catalyst that can cause the oxidation reaction of black smoke at a temperature lower than its ignition temperature (usually 650℃), such as noble metals such as platinum and palladium. Examples include metal compounds and non-noble metal metal compounds such as copper and nickel. The present inventors have confirmed through experiments that among the above catalysts, a Pd compound can oxidize and remove black smoke at the lowest temperature of about 350°C.
また、上記の触媒（金属化合物）を含有する溶液として
は、上記の触媒の水溶液、アルコール溶液、他の有機溶
媒の溶液等を選択して使用することができる。触媒の濃
度は、排ガスに対する金属化合物の溶液の分散量の制御
精度や触媒の溶解度等を考慮して定められる。Further, as the solution containing the above catalyst (metal compound), an aqueous solution of the above catalyst, an alcohol solution, a solution of another organic solvent, etc. can be selected and used. The concentration of the catalyst is determined in consideration of the control accuracy of the amount of dispersion of the metal compound solution in the exhaust gas, the solubility of the catalyst, and the like.
次に、第１図に示す黒煙除去装置の作用を説明する。Next, the operation of the black smoke removal device shown in FIG. 1 will be explained.
チャンバｌの導入口部１ａから排ガスが導入されると、
フィルタ２に排ガス中の黒煙が捕集され、排出口部１ｂ
からは黒煙がほとんど除去された排ガスか排出される。When exhaust gas is introduced from the inlet port 1a of the chamber l,
Black smoke in the exhaust gas is collected by the filter 2, and the exhaust port 1b
Exhaust gas from which most of the black smoke has been removed is emitted.
この黒煙除去に伴って、フィルタ２には徐々に黒煙が蓄
積され、フィルタ２の圧損が高まる。フィルタ２の圧損
があらかじめ設定された値に達すると、差圧検出器７が
電磁弁４に開路信号を与え、電磁弁４が一定時間開放さ
れて、触媒タンク５からノズル３に金属化合物の溶液が
供給される。そして、ノズル３から排ガス中に一定量の
金属化合物の溶液が分散される。溶液中の酸化触媒は、
フィルタ２に捕捉された黒煙の表面１こ付着して、排ガ
ス中に残存する酸素を残燃剤とする黒煙の酸化反応を黒
煙の平常の着火温度以下で促し、フィルタ２上の黒煙を
酸化、除去する。これによってフィルタ２は再生され、
圧損も低下する。酸化触媒作用を終えた金属化合物は、
主に金属酸化物としてフィルタ２の捕捉され、外Ｍｚ、
＝ｔ１＋六ノ１２ミ、−ノ□Ｅ＋ｈい−すす・Ｍｌｉｌ
ｆ＃襟ｍ関の始紡直後等、排ガス温度が低い場合には、
電磁弁４ａが開いて補助燃料の供給が可能な状態となる
。この状態で更に触媒の溶液の噴霧が必要となった場合
には、電磁弁４が開いて触媒の溶液と補助燃料とが同時
に噴霧され、この補助燃料の燃焼作用により、触媒によ
る捕集黒煙の酸化、除去が可能な温度を作り出すように
している。また、排ガス温度が、充分に高温度の場合に
は、電磁弁４ａが閉じて、補助燃料は送られず、触媒の
溶液のみを噴霧できる状態となる。このとき、実施例の
如き着火手段（金網１５）が設けられている場合には、
さらに低い温度ｊこおいても補助燃料が燃焼を開始する
ことが可能となって、触媒による捕集黒煙の酸化、除去
作用を促すことができる。As this black smoke is removed, black smoke gradually accumulates in the filter 2, and the pressure loss of the filter 2 increases. When the pressure drop of the filter 2 reaches a preset value, the differential pressure detector 7 gives an opening signal to the solenoid valve 4, and the solenoid valve 4 is opened for a certain period of time, allowing the metal compound solution to flow from the catalyst tank 5 to the nozzle 3. is supplied. Then, a certain amount of the metal compound solution is dispersed into the exhaust gas from the nozzle 3. The oxidation catalyst in solution is
The black smoke trapped on the filter 2 adheres to the surface of the filter 2 and promotes the oxidation reaction of the black smoke using the oxygen remaining in the exhaust gas as a residual combustion agent below the normal ignition temperature of black smoke, thereby reducing the black smoke on the filter 2. Oxidize and remove. This regenerates filter 2,
Pressure drop also decreases. The metal compound that has completed its oxidation catalytic action is
Mainly trapped in the filter 2 as metal oxides, Mz,
=t1+6ノ12mi, -ノ□E+h-soot・Mlil
When the exhaust gas temperature is low, such as immediately after the first spinning of the f# collar m section,
The solenoid valve 4a opens and becomes ready to supply auxiliary fuel. If further spraying of the catalyst solution is required in this state, the solenoid valve 4 is opened and the catalyst solution and auxiliary fuel are sprayed at the same time, and the combustion action of this auxiliary fuel causes the black smoke collected by the catalyst to be sprayed. We try to create a temperature that allows for oxidation and removal of Further, when the exhaust gas temperature is sufficiently high, the solenoid valve 4a is closed, and the auxiliary fuel is not sent and only the catalyst solution can be sprayed. At this time, if the ignition means (wire mesh 15) as in the embodiment is provided,
It becomes possible for the auxiliary fuel to start combustion even at a lower temperature, and the oxidation and removal action of the collected black smoke by the catalyst can be promoted.
このように上記装置によれば、フィルタ２の上流側の圧
力を圧力検出端６ａにより検知し、下流側の圧力を圧力
検出端６ｂにより検知することで、差圧検出器７がフィ
ルタ２前後の圧力差を検出し、これによってフィルタ２
の黒煙捕集量を検出し、上述のような金属化合物の溶液
の排ガス中への分散をフィルタ２の黒煙捕集量に応じて
行ない、適宜フィルタ２の再生を行ないつつ黒煙を除去
する作用をする。しかも、排ガス温度が触媒の添加のみ
では黒煙の酸化反応を引き起こすに不充分なときにも補
助燃料の燃焼により、排ガスをフィルタ２の近傍にて強
制的に触媒の作用が発揮される温度にまで上昇せしめ捕
集黒煙の除去を行なうことができる。また、黒煙補集量
の検出に当たっては、フィルタ２の前後差圧を以て行う
ものであるから、たとえ機関回転数の変化に伴い排圧が
大きく変化した場合でも、それに影響を受けることなく
正確な検出がなされる。In this way, according to the above device, the pressure on the upstream side of the filter 2 is detected by the pressure detection end 6a, and the pressure on the downstream side is detected by the pressure detection end 6b. Detects the pressure difference, which causes filter 2
detects the amount of black smoke collected by the filter 2, disperses the metal compound solution into the exhaust gas according to the amount of black smoke collected by the filter 2, and removes the black smoke while regenerating the filter 2 as appropriate. have the effect of Furthermore, even when the exhaust gas temperature is insufficient to cause the oxidation reaction of black smoke with the addition of a catalyst, the combustion of the auxiliary fuel forces the exhaust gas near the filter 2 to a temperature at which the catalytic action is exerted. The collected black smoke can be removed. In addition, since the amount of black smoke collected is detected using the differential pressure across the filter 2, even if the exhaust pressure changes significantly due to changes in engine speed, accurate detection is possible without being affected by this. A detection is made.
従って、上記の黒煙除去装置によれば、ディーゼル機関
等の黒煙を排出する機関に適用して、機関の連続運転が
可能であり、かつ捕集黒煙の後処理が不要となるばかり
でなく、黒煙の平常の着火′ 温度より低い温度での
フィルタの再生が可能となって、フィルタが高温にさら
されないことから、従来のバーナによる再生方式に比べ
てフィルタ寿命の著しい延長を図ることができる。しか
も、機関の始動時等排ガス温度が低い状況においても補
助燃料の作用により、フィルタの近傍で排ガスを、触媒
作用が発揮される温度にまで上昇させることができるか
ら、極めて高効率な黒煙除去がなされる。Therefore, the above black smoke removal device can be applied to engines that emit black smoke, such as diesel engines, to enable continuous operation of the engine, and eliminates the need for post-treatment of the collected black smoke. Since the filter can be regenerated at a temperature lower than the normal ignition temperature of black smoke and the filter is not exposed to high temperatures, the filter life can be significantly extended compared to the conventional regeneration method using a burner. Can be done. Furthermore, even when the exhaust gas temperature is low, such as when starting the engine, the action of the auxiliary fuel can raise the exhaust gas near the filter to a temperature at which the catalytic action is exerted, resulting in extremely efficient black smoke removal. will be done.
なお、この実施例に示すごとく、補助燃料で補助的な加
熱を行なう場合にも、触媒による酸化反応は、黒煙の平
常の着火温度より低温度で起こさせろことが必要であっ
て、従って、別途温度制御手段（例えば、フィルタ２の
前段の温度センサ及び触媒量や補助燃料の供給量の制御
手段等）を設けてもよい。As shown in this example, even when auxiliary heating is performed using auxiliary fuel, the oxidation reaction by the catalyst must occur at a temperature lower than the normal ignition temperature of black smoke. Separate temperature control means (for example, a temperature sensor upstream of the filter 2, a means for controlling the amount of catalyst and the amount of auxiliary fuel supplied, etc.) may be provided.
第２図は、本発明の第２の実施例を示す図であって、こ
の図に示す装置は、第１図に示す装置の着火用の金網１
５に代えて、電気スパークを発生するための電極Ｉ６を
設けてなるものである。この実施例によっても面記第１
の実施例と同様な効果を得ることができる。FIG. 2 is a diagram showing a second embodiment of the present invention, and the apparatus shown in this figure is a wire mesh 1 for ignition of the apparatus shown in FIG.
5, an electrode I6 for generating an electric spark is provided. According to this example, the first
The same effects as in the embodiment can be obtained.
なお、本発明は、上述した実施例のごとく触媒としての
金属化合物の溶液を間欠的に排ガス中に送出する制御方
式に限るものではなく、前記金属化合物の溶液の分散量
を制御しつつ連続的に送出してもよいことは言うまでも
ない。Note that the present invention is not limited to the control method in which a solution of a metal compound as a catalyst is intermittently delivered into the exhaust gas as in the above-mentioned embodiments, but is not limited to a control method in which a solution of a metal compound as a catalyst is intermittently delivered into the exhaust gas, but continuously while controlling the amount of dispersion of the solution of the metal compound. Needless to say, it may be sent to
以上の説明から明らかなように、本発明の黒煙の除去装
置は、フィルタに捕集された黒煙を排ガス中に分散され
た酸化反応触媒の作用によって黒煙の平常の着火温度よ
り低温度で酸化、除去し、フィルタの再生を行ないつつ
、排ガスから黒煙を除去するようにしたから、ディーゼ
ル機関等の黒煙を放出する機関を、排ガスから黒煙を除
去して連続運転することが可能となると共に、捕集黒煙
の後処理が不要であり、更にはフィルタが高温度にさら
されることを防止してフィルタ寿命を著しく延長するこ
とができる。しかも、機関の始動時等排ガス温度が低い
場合にも、補助燃料の燃焼により、触媒をその作用を発
揮し得る温度にまで加熱して効率的な黒煙除去が行える
、等の優れた効果を奏することができる。As is clear from the above description, the black smoke removal device of the present invention converts the black smoke collected by the filter into a temperature lower than the normal ignition temperature of black smoke by the action of the oxidation reaction catalyst dispersed in the exhaust gas. Since we have removed black smoke from the exhaust gas while oxidizing and removing it and regenerating the filter, it is possible to continuously operate engines that emit black smoke, such as diesel engines, by removing black smoke from the exhaust gas. In addition, there is no need for post-treatment of the collected black smoke, and furthermore, the filter life can be significantly extended by preventing the filter from being exposed to high temperatures. Furthermore, even when the exhaust gas temperature is low, such as when starting the engine, the combustion of auxiliary fuel heats the catalyst to a temperature at which it can perform its function, making it possible to efficiently remove black smoke. can play.
第１図は、本発明の第１の実施例を示す概略構成図、第
２図は同第２の実施例を示す概略構成図。
である。
１・・・・・・フィルタチャンバ、 ２・・・・・・
フィルタ、３・・・・・・ノズル、 ４・
・・・・・電磁弁、４ａ・・・・・・電磁弁、
５・・・・・・触媒タンク、６ ａ、 ６ ｂ・・
・・・・圧力検出端、 ７・・・・・・差圧検出器、
１２・・・・・・燃料タンク、 １３・・・・・
・供給管、１５・・・・・・金網（着火手段） １６・
・・・・・電極（着火手段）。（上記符号３．４．５は
触媒添加手段構成要素。）FIG. 1 is a schematic configuration diagram showing a first embodiment of the present invention, and FIG. 2 is a schematic configuration diagram showing the second embodiment. It is. 1...Filter chamber, 2...
Filter, 3... Nozzle, 4.
...Solenoid valve, 4a...Solenoid valve,
5... Catalyst tank, 6 a, 6 b...
...Pressure detection end, 7...Differential pressure detector,
12...Fuel tank, 13...
・Supply pipe, 15... Wire mesh (ignition means) 16.
...Electrode (ignition means). (The above code 3.4.5 is a component of the catalyst addition means.)
Claims (1)
鉛補集フィルタが設置されてなる内燃機関の排ガス中の
黒煙除去装置において、 前記排気系管路の前記フィルタより上流側に、黒煙に対
して酸化触媒作用を有する金属化合物の溶液を前記フィ
ルタの黒煙補集量に基づいて排ガス中に分散させる触媒
添加手段と、排ガス温度に基づいて、前記触媒添加手段
に補助燃料を供給する補助燃料添加手段とを備えている
ことを特徴とする内燃機関の排ガス中の黒煙除去装置。 ２）前記触媒添加手段と前記フィルタとの間に、前記補
助燃料を燃焼させるための着火手段を備えていることを
特徴とする特許請求の範囲第１項記載の内燃機関の排ガ
ス中の黒煙除去装置。[Scope of Claims] 1) A device for removing black smoke from exhaust gas of an internal combustion engine, in which a graphite collection filter for removing graphite is installed in an exhaust system pipe of an internal combustion engine, comprising: Upstream of the filter, a catalyst adding means for dispersing a solution of a metal compound having an oxidation catalytic effect on black smoke into the exhaust gas based on the amount of black smoke collected by the filter; A device for removing black smoke from exhaust gas of an internal combustion engine, comprising auxiliary fuel addition means for supplying auxiliary fuel to the catalyst addition means. 2) Black smoke in exhaust gas of an internal combustion engine according to claim 1, characterized in that an ignition means for burning the auxiliary fuel is provided between the catalyst addition means and the filter. removal device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63006052A JPS63212713A (en) | 1988-01-14 | 1988-01-14 | Device for removing graphite in exhaust gas of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63006052A JPS63212713A (en) | 1988-01-14 | 1988-01-14 | Device for removing graphite in exhaust gas of internal combustion engine |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58225559A Division JPS60122214A (en) | 1983-11-30 | 1983-11-30 | Black smoke elimination in exhaust gas for internal-combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63212713A true JPS63212713A (en) | 1988-09-05 |
Family
ID=11627847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63006052A Pending JPS63212713A (en) | 1988-01-14 | 1988-01-14 | Device for removing graphite in exhaust gas of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63212713A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100807795B1 (en) | 2006-04-12 | 2008-02-27 | 주식회사 유투에스 | Apparatus and method for regenerating diesel particulate filter, and a medium having computer readable program executing the method |
| WO2016076226A1 (en) * | 2014-11-12 | 2016-05-19 | いすゞ自動車株式会社 | Internal combustion engine and method for removing particulate substance from internal combustion engine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56509A (en) * | 1979-06-12 | 1981-01-07 | Nippon Soken Inc | Purifier for carbon fine particle |
| JPS5730523A (en) * | 1980-07-29 | 1982-02-18 | Tsuchiya Mfg Co Ltd | Treatment of fine particles in exhaust gas |
| JPS5730521A (en) * | 1980-07-29 | 1982-02-18 | Tsuchiya Mfg Co Ltd | Treatment of fine particles in exhaust gas |
-
1988
- 1988-01-14 JP JP63006052A patent/JPS63212713A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56509A (en) * | 1979-06-12 | 1981-01-07 | Nippon Soken Inc | Purifier for carbon fine particle |
| JPS5730523A (en) * | 1980-07-29 | 1982-02-18 | Tsuchiya Mfg Co Ltd | Treatment of fine particles in exhaust gas |
| JPS5730521A (en) * | 1980-07-29 | 1982-02-18 | Tsuchiya Mfg Co Ltd | Treatment of fine particles in exhaust gas |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100807795B1 (en) | 2006-04-12 | 2008-02-27 | 주식회사 유투에스 | Apparatus and method for regenerating diesel particulate filter, and a medium having computer readable program executing the method |
| WO2016076226A1 (en) * | 2014-11-12 | 2016-05-19 | いすゞ自動車株式会社 | Internal combustion engine and method for removing particulate substance from internal combustion engine |
| US10465581B2 (en) | 2014-11-12 | 2019-11-05 | Isuzu Motors Limited | Internal combustion engine and method for removing particulate substance from internal combustion engine |
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