JP3014940B2 - Dust collector - Google Patents
Dust collectorInfo
- Publication number
- JP3014940B2 JP3014940B2 JP7034902A JP3490295A JP3014940B2 JP 3014940 B2 JP3014940 B2 JP 3014940B2 JP 7034902 A JP7034902 A JP 7034902A JP 3490295 A JP3490295 A JP 3490295A JP 3014940 B2 JP3014940 B2 JP 3014940B2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- pressure loss
- backwash
- backwash air
- dust collector
- 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.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0233—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more purifying devices arranged in parallel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、含塵ガス中に含まれる
粒子状物質を捕集除去するフィルタと、該フィルタにお
ける含塵ガス流れとは逆向きに該フィルタを通過する清
浄なガスの流れを発生せしめる逆洗気流発生装置とを備
えた集塵装置の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for collecting and removing particulate matter contained in a dust-containing gas, and a filter for cleaning a clean gas passing through the filter in a direction opposite to the flow of the dust-containing gas in the filter. The present invention relates to an improvement in a dust collector provided with a backwash air flow generator for generating a flow.
【０００２】[0002]
【従来の技術】従来から、バス、トラック等のディーゼ
ルエンジン車から排出されるカーボンを主成分とする微
粒子状物質を、フィルタを使用して排気ガス中から除去
する集塵装置が知られている。そのうち、実公平６−４
０８９７号公報および実公平６−４０９００号公報に
は、一定間隔で逆洗を行うにあたり、逆洗エア供給用の
電磁弁の開き時間をエンジンの回転数およびトルクの変
動に応じて制御する手段を設けたエンジンの排出ガスの
後処理装置が開示されている。2. Description of the Related Art Conventionally, there is known a dust collector which removes particulate matter mainly composed of carbon discharged from diesel engine vehicles such as buses and trucks from exhaust gas using a filter. . Among them, the actual fairness 6-4
JP-A-0897 and JP-B-6-40900 disclose means for controlling the opening time of a solenoid valve for supplying backwash air in accordance with fluctuations in engine speed and torque when backwashing is performed at regular intervals. An exhaust gas aftertreatment device for an engine provided is disclosed.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述し
た従来の技術では、フィルタの圧損値や排気ガス温度に
かかわらず、単にエンジン回転数およびトルクの変動に
応じて逆洗エア量を調整して一定間隔で逆洗を行ってい
る。そのため、例えば、フィルタの圧損値が低下し始め
て逆洗を行う必要のない許容圧損値以下となっても、エ
ンジン回転数およびトルクの変動に応じて逆洗エア量を
決定して逆洗を行ってしまうとともに、捕集した微粒子
状物質の状態が変化しても、エンジンの回転数およびト
ルクが変化しなければ常に同じ逆洗エア量で逆洗を行う
ため、逆洗エアが無駄に消費されてしまう問題があっ
た。However, in the prior art described above, regardless of the pressure loss value of the filter or the exhaust gas temperature, the backwash air amount is simply adjusted according to the fluctuations of the engine speed and the torque to be constant. Backwashing is performed at intervals. Therefore, for example, even if the pressure loss value of the filter starts to decrease and becomes equal to or less than the allowable pressure loss value that does not require backwashing, the backwashing air amount is determined according to the fluctuation of the engine speed and the torque to perform the backwashing. In addition, even if the state of the collected particulate matter changes, the backwash air is always used with the same amount of backwash air unless the engine speed and torque change, so that the backwash air is wasted. There was a problem.
【０００４】この問題は、特にバス、トラック等のディ
ーゼル車に集塵装置を使用しようとした場合に問題とな
っていた。すなわち、逆洗エア源として、ディーゼル車
の場合ブレーキシステムに用いられる加圧エアを用いる
ことが考えられるが、その場合は、ブレーキシステムに
悪影響を及ぼさないよう、１回の逆洗再生に使用可能な
エア量は例えば１０〜３０リットルと非常に僅かな量し
か余裕がなかった。また、１回あたり１０〜３０リット
ルの逆洗エア量でも、逆洗間隔が短かったり頻繁に逆洗
をすることは、車載用の集塵装置としては問題があっ
た。また、逆洗時に発生する逆洗エア放出音のレベルは
逆洗エア量にほぼ比例するが、逆洗エア量が一定である
ため逆洗エア放出により騒音レベルを低減することが困
難であった。[0004] This problem has been a problem especially when an attempt is made to use a dust collector for a diesel vehicle such as a bus or a truck. In other words, in the case of diesel vehicles, pressurized air used for the brake system may be used as the backwash air source. In this case, it can be used for one backwash regeneration so that the brake system is not adversely affected. A very small amount of air, for example, 10 to 30 liters, could afford. Also, even with a backwash air amount of 10 to 30 liters per time, short backwash intervals and frequent backwashing have been a problem as a dust collector for vehicles. Also, the level of the backwash air release sound generated during backwash is almost proportional to the amount of backwash air, but since the backwash air amount is constant, it was difficult to reduce the noise level by releasing the backwash air. .
【０００５】本発明の目的は上述した課題を解消して、
圧縮エアを利用して逆洗再生を行うにあたり、エア量を
可能な限り低減しても十分な逆洗効果を得ることができ
る集塵装置を提供しようとするものである。An object of the present invention is to solve the above-mentioned problems,
It is an object of the present invention to provide a dust collector capable of obtaining a sufficient backwash effect even when the amount of air is reduced as much as possible in performing backwash regeneration using compressed air.
【０００６】[0006]
【課題を解決するための手段】本発明の集塵装置は、含
塵ガス中に含まれる粒子状物質を捕集除去するフィルタ
と、該フィルタにおける含塵ガス流れとは逆向きに該フ
ィルタを通過する清浄なガスの流れを発生せしめる逆洗
気流発生装置とを備えた集塵装置において、前記フィル
タの圧力損失を検出する圧力検出手段を有し、前記逆洗
気流発生装置が、前記圧力検出手段で求めた圧力損失に
基づき、前記圧力損失検出手段で検出された圧力損失が
高い時には逆洗気流を多く、また前記圧力損失検出手段
で検出された圧力損失が低い時には逆洗気流の流量を少
なくするよう調整する逆洗気流流量調節手段を有するこ
とを特徴とするものである。According to the present invention, there is provided a dust collecting apparatus comprising: a filter for collecting and removing particulate matter contained in a dust-containing gas; and a filter provided in a direction opposite to a flow of the dust-containing gas in the filter. A dust collecting device having a backwash airflow generating device for generating a flow of a clean gas passing therethrough, comprising a pressure detecting means for detecting a pressure loss of the filter, wherein the backwash airflow generating device performs the pressure detection. Based on the pressure loss obtained by the means, when the pressure loss detected by the pressure loss detection means is high, the backwash airflow is large, and when the pressure loss detected by the pressure loss detection means is low, the flow rate of the backwash airflow is determined. It is characterized by having backwash air flow rate adjusting means for adjusting so as to reduce it.
【０００７】[0007]
【作用】上述した構成において、逆洗気流流量調節手段
により、逆洗気流発生装置から供給される逆洗気流の流
量を、排気ガスの温度および圧力損失に応じて時間とと
もに変化させることができ、その時点で十分かつ最小の
逆洗気流をフィルタに流すことができる。そのため、例
えば圧縮エアを利用して逆洗再生を行うにあたり、エア
量を可能な限り低減しても十分な逆洗効果を得ることが
できる。In the above construction, the backwash air flow rate adjusting means can change the flow rate of the backwash air flow supplied from the backwash air flow generator with time according to the temperature and pressure loss of the exhaust gas. At that point, a sufficient and minimal backwash airflow can be passed through the filter. Therefore, for example, in performing backwashing regeneration using compressed air, a sufficient backwashing effect can be obtained even if the air amount is reduced as much as possible.
【０００８】本発明は、フィルタに付着した微粒子状物
質に対する逆洗効果は、排気ガス温度と逆洗エア流量と
の関係、圧力損失の値と逆洗エア流量との関係、または
排気ガス温度と圧力損失から求めることができる圧損上
昇率と逆洗エア流量の関係により変化することを見いだ
したことによる。すなわち、排気ガス温度が高くなるに
従い、フィルタに付着した微粒子状物質の性状が変化し
て逆洗し易くなるために、フィルタの圧損上昇率が、同
一の逆洗条件においても排気ガス温度が高くなるに従い
低下していく。また、同じ排気ガス温度の場合、逆洗エ
ア量が多い程、圧損上昇率は低下する。従って、排気ガ
ス温度および／または圧力損失の値を検出して、検出さ
れた温度および／または圧損値に応じて逆洗エア量を決
定することで、逆洗効果の制御が可能であり、逆洗エア
量の適正化が可能となる。According to the present invention, the effect of backwashing on particulate matter adhering to a filter depends on the relationship between the exhaust gas temperature and the backwash air flow, the relationship between the pressure loss value and the backwash air flow, or the relationship between the exhaust gas temperature and the backwash air flow. It was found that it changed depending on the relationship between the pressure loss rise rate that can be obtained from the pressure loss and the backwash air flow rate. That is, as the exhaust gas temperature increases, the properties of the particulate matter attached to the filter change and the backwash becomes easy, so that the pressure loss increase rate of the filter increases even under the same backwash condition. It decreases as it becomes. Further, at the same exhaust gas temperature, the larger the backwash air amount, the lower the pressure loss rise rate. Therefore, the backwash effect can be controlled by detecting the exhaust gas temperature and / or the pressure loss value and determining the backwash air amount according to the detected temperature and / or pressure loss value. It is possible to optimize the amount of washing air.
【０００９】具体的な逆洗気流の流量の決定は、（１）
温度センサを設け、この温度計により含塵ガスの温度お
よび／またはフィルタの温度を測定し、測定した温度が
低い時は逆洗気流の流量を多くするとともに、温度が高
い時は流量を少なくするよう調整する方法、（２）圧力
検出装置を設け、この圧力検出装置によりフィルタの圧
力損失を検出し、検出した圧力損失が高い時は逆洗気流
の流量を多くするとともに、圧力損失が低い時は流量を
少なくするよう調整する方法が好ましい。さらに、
（３）排気ガス温度と、圧力損失の経時的変化から求め
た圧損上昇率と、流すべき逆洗エア量との関係を、予め
先行試験で求めておき、排気ガス温度に応じて圧損上昇
率が０または負となるよう、予め求めた関係から逆洗エ
アの流量を決定するよう調整すると、より精度の良い制
御ができるため好ましい。The specific flow rate of the backwash air flow is determined by (1)
A temperature sensor is provided, and the temperature of the dust-containing gas and / or the temperature of the filter are measured by the thermometer. When the measured temperature is low, the flow rate of the backwash air flow is increased, and when the temperature is high, the flow rate is decreased. (2) A pressure detecting device is provided, and a pressure loss of the filter is detected by the pressure detecting device. When the detected pressure loss is high, the flow rate of the backwash air flow is increased, and when the pressure loss is low, Is preferably adjusted so as to reduce the flow rate. further,
(3) The relationship between the exhaust gas temperature, the pressure loss increase rate obtained from the temporal change in pressure loss, and the amount of backwash air to be flowed is determined in advance by a preliminary test, and the pressure loss increase rate is determined according to the exhaust gas temperature. It is preferable to adjust the flow rate of the backwash air to be determined from the relationship obtained in advance so that the value of the backwash air becomes 0 or negative, because more accurate control can be performed.
【００１０】[0010]
【実施例】図１は本発明の集塵装置の一例の構成を示す
図である。図１に示す例では、２個の集塵装置を使用
し、一方の集塵装置が集塵を行うと同時に他方の集塵装
置の逆洗再生を行いそれを交互に行うことで、連続して
集塵が可能な構成をとっている。図１において、本発明
の集塵装置１−１（１−２）は、缶体２−１（２−２）
内に固定した、含塵ガス中に含まれる粒子状物質を捕集
除去するフィルタ３−１（３−２）と、このフィルタ３
−１（３−２）における含塵ガスの流れとは逆向きにフ
ィルタ３−１（３−２）を通過した清浄なガスの流れを
発生せしめる逆洗気流発生装置４−１（４−２）とを備
えている。FIG. 1 is a diagram showing a configuration of an example of a dust collecting apparatus according to the present invention. In the example shown in FIG. 1, two dust collectors are used, and one of the dust collectors collects dust, and at the same time, the other dust collector performs backwashing regeneration and alternately performs the same. The dust collection is possible. In FIG. 1, a dust collector 1-1 (1-2) of the present invention includes a can 2-1 (2-2).
A filter 3-1 (3-2) fixed inside the filter for collecting and removing particulate matter contained in the dust-containing gas;
-1 (3-2), a backwash air flow generator 4-1 (4-2) that generates a clean gas flow that has passed through the filter 3-1 (3-2) in a direction opposite to the flow of the dust-containing gas. ).
【００１１】本例におけるフィルタ３−１（３−２）と
しては、図２にその一例を示すように、濾過能を有する
隔壁２１で区画された多数のセル２２を有するハニカム
構造であり、押出し成形により一体形成されており、所
定のセル２２については一方の端部２２ａを封じ、残余
のセル２２については他方の端部２２ｂを封じてなる構
造を有するフィルタを使用する。フィルタ材料として
は、耐熱性、耐酸化性、耐熱衝撃性の観点から多孔質コ
ージェライトセラミックスが好ましいが、この他にも多
孔質の炭化珪素、アルミナ、ムライト、窒化珪素、焼結
合金等も使用することができる。なお、フィルタ３−１
（３−２）については、その他の構成、例えば、図３に
一例を示すように、一対の対向する端面の一方の端面か
ら他方の端面へ貫通する相互に平行な複数の貫通孔２３
を有しその一端面を封じた平板状のフィルタエレメント
２４を、スペーサ２５を介して複数枚積層してなる構造
を有するものも使用することができる。また、図４
（ａ）、（ｂ）に一例を示すように、隣り合う端面に相
互に平行な複数の貫通孔２６を有しそれぞれの一端面を
封じた構造を有するものも使用することができる。As shown in FIG. 2, the filter 3-1 (3-2) in this embodiment has a honeycomb structure having a large number of cells 22 partitioned by partition walls 21 having filtering ability. A filter that is integrally formed by molding and has a structure in which one end 22a is sealed for a predetermined cell 22 and the other end 22b is sealed for the remaining cell 22 is used. As the filter material, porous cordierite ceramics is preferable from the viewpoint of heat resistance, oxidation resistance, and thermal shock resistance. In addition, porous silicon carbide, alumina, mullite, silicon nitride, sintered alloy, and the like are also used. can do. The filter 3-1
As for (3-2), as shown in an example in FIG. 3, a plurality of mutually parallel through holes 23 penetrating from one end face of a pair of opposed end faces to the other end face, as shown in an example in FIG. 3.
A filter element having a structure in which a plurality of filter elements 24 each having a flat plate shape and one end face of which is sealed with a spacer 25 interposed therebetween can also be used. FIG.
As shown in (a) and (b), an example in which a plurality of mutually parallel through holes 26 are provided in adjacent end faces and each end face is sealed can also be used.
【００１２】また、逆洗気流発生装置４−１（４−２）
は、缶体２−１（２−２）のフィルタ３−１（３−２）
の下流側に設けた管路５−１（５−２）に、逆洗エア開
閉弁６−１（６−２）、エアタンク７−１（７−２）、
コンプレッサ８−１（８−２）を設けるとともに、逆洗
エア開閉弁６−１（６−２）の開閉動作を制御するため
の、記憶回路、演算回路を有する逆洗気流流量調節装置
９−１（９−２）を設けて構成されている。A backwash air flow generator 4-1 (4-2).
Is the filter 3-1 (3-2) of the can 2-1 (2-2).
A backwash air opening / closing valve 6-1 (6-2), an air tank 7-1 (7-2),
In addition to the compressor 8-1 (8-2), a backwash air flow rate controller 9- having a memory circuit and an arithmetic circuit for controlling the opening / closing operation of the backwash air opening / closing valve 6-1 (6-2). 1 (9-2).
【００１３】さらに、図１に示す例では、２系統のフィ
ルタ部を有し、含塵ガスとしての例えばディーゼルエン
ジンからの排気ガスを集塵装置１−１（１−２）へ供給
するための排気ガス供給管路１０と、集塵の終了した清
浄な排気ガスを集塵装置１−１（１−２）から系外へ排
出するための排気ガス排出管路１１とを設けている。さ
らに、缶体２−１（２−２）のフィルタ３−１（３−
２）の上流側に、管路１２−１（１２−２）を介して電
気ヒータ付きのスートタンク１３−１（１３−２）を設
けている。本例では、逆洗気流流量調節装置７へ供給す
べき排気ガス温度とフィルタ１−１（１−２）の圧損と
を測定するため、排気ガス供給管路１０に温度センサ１
４−１（１４−２）を設けるとともに、排気ガス供給管
路１０と排気ガス排出管路１１とに接続した差圧計１５
を設けている。また、排気ガス供給管路１０と排気ガス
排出管路１１とには、運転を切り換えるための排気遮断
弁１６−１と１７−１（１６−２と１７−２）を設けて
いる。なお、差圧計１５を集塵装置１−１および１−２
の各々に設けることもできる。こうすることで、各々の
フィルタの圧損上昇をより正確に把握でき、より効率よ
く逆洗動作の制御を行うことが可能となる。Further, in the example shown in FIG. 1, there are two types of filter sections for supplying exhaust gas, for example, from a diesel engine as dust-containing gas to the dust collector 1-1 (1-2). An exhaust gas supply pipe 10 and an exhaust gas discharge pipe 11 for discharging clean exhaust gas after dust collection from the dust collector 1-1 (1-2) to the outside of the system are provided. Furthermore, the filter 3-1 (3-) of the can 2-1 (2-2)
On the upstream side of 2), a soot tank 13-1 (13-2) with an electric heater is provided via a conduit 12-1 (12-2). In this example, the temperature sensor 1 is provided in the exhaust gas supply line 10 to measure the temperature of the exhaust gas to be supplied to the backwash air flow rate controller 7 and the pressure loss of the filter 1-1 (1-2).
4-1 (14-2), and a differential pressure gauge 15 connected to the exhaust gas supply line 10 and the exhaust gas discharge line 11.
Is provided. The exhaust gas supply pipe 10 and the exhaust gas discharge pipe 11 are provided with exhaust shutoff valves 16-1 and 17-1 (16-2 and 17-2) for switching operation. The differential pressure gauge 15 is connected to the dust collecting devices 1-1 and 1-2.
Can also be provided for each of them. By doing so, it is possible to more accurately grasp the increase in the pressure loss of each filter, and it is possible to more efficiently control the backwashing operation.
【００１４】上述した構成の本発明の集塵装置を利用し
たシステムでは、排気遮断弁１６−１、１７−１を開状
態、洗浄エア開閉弁６−１を閉状態とするとともに、排
気遮断弁１６−２、１７−２を閉状態、逆洗エア開閉便
６−２を開状態とすることで、集塵装置１−１で集塵を
行うと同時に、集塵装置１−２で逆洗を行っている。す
なわち、上述した弁の開閉状態で、まず集塵動作は、含
塵ガスとしての排気ガスをフィルタ３−１の一方の開口
端からフィルタ３−１内に供給し、フィルタ３−１の隔
壁を通過させて集塵を行ったのち、フィルタ３−１の他
方の開口端から集塵後の正常な排気ガスを外部へ排出す
ることで行うことができる。In the system using the dust collector of the present invention having the above-described configuration, the exhaust shutoff valves 16-1 and 17-1 are opened, the cleaning air on / off valve 6-1 is closed, and the exhaust shutoff valve is opened. By setting the 16-2 and 17-2 to the closed state and the backwash air opening / closing service 6-2 to the open state, the dust is collected by the dust collector 1-1 and at the same time the backwash is performed by the dust collector 1-2. It is carried out. That is, in the above-described valve open / closed state, first, in the dust collection operation, exhaust gas as dust-containing gas is supplied into the filter 3-1 from one opening end of the filter 3-1 and the partition wall of the filter 3-1 is removed. After passing through and collecting dust, normal exhaust gas after dust collection can be discharged to the outside from the other opening end of the filter 3-1.
【００１５】また、逆洗動作は、所定の逆洗エア量の逆
洗エアを、フィルタ３−２の他方の開口端から供給し、
フィルタ３−２の隔壁を通過させたのち、除去すべき粒
子状物質であるスートとともにフィルタ３−２の一方の
開口端から排出し、排出したスートをスートタンク１３
−２に貯めることで行うことができる。なお、スートタ
ンク１３−２内のスートは、スートタンク１３−２に付
属した電気ヒータを利用して定期的にあるいは連続的に
燃焼除去させることができる。また、流すべき逆洗エア
量は、温度センサ１４−２から伝達される信号に基づき
検出された排気ガスの温度および差圧計１５から伝達さ
れる信号に基づき検出された圧損に基づいて、記憶回
路、演算回路を有する逆洗気流流量調節装置９−２で決
定することができる。In the backwashing operation, a predetermined amount of backwashing air is supplied from the other open end of the filter 3-2.
After passing through the partition wall of the filter 3-2, the soot, which is particulate matter to be removed, is discharged from one opening end of the filter 3-2, and the discharged soot is discharged into the soot tank 13
-2. The soot in the soot tank 13-2 can be burnt and removed periodically or continuously using an electric heater attached to the soot tank 13-2. The amount of backwash air to be flown is determined based on the temperature of the exhaust gas detected based on the signal transmitted from the temperature sensor 14-2 and the pressure loss detected based on the signal transmitted from the differential pressure gauge 15, and stored in the storage circuit. , Can be determined by the backwash air flow controller 9-2 having an arithmetic circuit.
【００１６】上述した構成の本発明の集塵装置で重要な
点は、圧縮した逆洗エアを使用してフィルタ３−１（３
−２）の再生を行うにあたり、逆洗気流流量調節装置９
−１（９−２）を設け、逆洗時の状態に応じた最小かつ
十分な逆洗エア量の逆洗エアを流すことで、逆洗エア量
を可能な限り低減しても十分な逆洗効果を得ている点で
ある。すなわち、本発明者らは、幾多の研究の結果、図
５に示す厚損上昇率を考慮することで、図６に示すよう
な排気ガス温度と圧損上昇率と逆洗エア消費量との間に
一定の関係があることを見い出した。まず、図５に従っ
て厚損上昇率を説明すると、通常の集塵状態における厚
損値はフィルタの目詰まりとともに次第に増加し、ある
値ａに達する。ここで、逆洗を行うと、一瞬厚損値は
ａ’まで下がり、さらに集塵動作を再会すると再び厚損
値は上昇しｂに達する。ここで、再度逆洗を行うと厚損
値はｂ’に下がり、これを繰り返すことで厚損値の上昇
を抑制することができる。その際、（Ｐb −Ｐa ）／
（Ｔb −Ｔa ）が厚損上昇率となる。An important point of the dust collector of the present invention having the above-described structure is that the filter 3-1 (3
In performing the regeneration of -2), the backwash air flow rate adjusting device 9
-1 (9-2) is provided, and by supplying the minimum and sufficient amount of backwash air according to the state at the time of backwash, sufficient backflow is achieved even if the backwash air amount is reduced as much as possible. The point is that it has a washing effect. That is, as a result of many studies, the present inventors considered the thickness loss rise rate shown in FIG. 5 to obtain the relationship between the exhaust gas temperature, the pressure loss rise rate, and the backwash air consumption as shown in FIG. Have a certain relationship. First, the thickness loss increase rate will be described with reference to FIG. 5. The thickness loss value in a normal dust collection state gradually increases with clogging of the filter and reaches a certain value a. Here, when backwashing is performed, the thickness loss value instantly drops to a ′, and when the dust collection operation is re-established, the thickness loss value increases again and reaches b. Here, when backwashing is performed again, the thickness loss value falls to b ′, and by repeating this, the increase in the thickness loss value can be suppressed. At that time, (P b -P a) /
(T b -T a) is the thickness loss rate of increase.
【００１７】このように定義した圧損上昇率は、図６
（ａ）に示すように、逆洗を行うに従い、圧損値が徐々
に上昇する場合を圧損上昇率が正、圧損値が変化しない
場合を圧損上昇率が０、圧損が徐々に低下する場合を圧
損上昇率が負、と定義することができる。そして、図６
（ｂ）に示すように、圧損上昇率は、排気ガス温度を逆
洗エア量によって変化する。また、逆洗を行うにあた
り、圧損上昇率を０または負とする必要がある。そのた
め、温度センサで測定した排気ガス温度と、差圧計で測
定した時々刻々の圧損値とそれから求めた圧損上昇率と
がわかれば、圧損上昇率が０または負となる最適な逆洗
エア量を図６（ｂ）の関係から求めることができる。求
めた逆洗エア量で逆洗を行うよう逆洗気流流量調節装置
９−１（９−２）で制御することで、本発明の集塵装置
を得ることができる。なお、図６（ｂ）に示す関係は、
以下の逆洗試験から求めた。すなわち、エンジンとして
は直列８気筒で８リットルのディーゼルエンジンを使用
し、集塵装置のフィルタとしては容量が４リットル／個
のハニカム構造コージェライト製フィルタを２個使用し
た。また、圧損値が低く１０００ｍｍＨ2 Ｏ以下では、
逆洗エア量が５リットル前後、圧損値が３０００ｍｍＨ
2 Ｏを越えないように、最大３０リットルを１回の逆洗
で消費した。FIG. 6 shows the pressure drop increase rate defined as above.
As shown in (a), when the pressure loss value gradually increases as the backwashing is performed, the pressure loss increase rate is positive, when the pressure loss value does not change, the pressure loss increase rate is 0, and when the pressure loss gradually decreases. The pressure loss rise rate can be defined as negative. And FIG.
As shown in (b), the pressure loss rise rate changes the exhaust gas temperature depending on the backwash air amount. In performing backwashing, it is necessary to set the pressure loss increase rate to 0 or negative. Therefore, if the exhaust gas temperature measured by the temperature sensor, the instantaneous pressure loss value measured by the differential pressure gauge, and the pressure loss increase rate obtained therefrom are known, the optimal backwash air amount at which the pressure loss increase rate becomes zero or negative is determined. It can be obtained from the relationship shown in FIG. The dust collection device of the present invention can be obtained by controlling the backwash air flow control device 9-1 (9-2) so as to perform backwash with the obtained backwash air amount. Note that the relationship shown in FIG.
It was determined from the following backwash test. That is, an in-line 8-cylinder 8 liter diesel engine was used as an engine, and two filters of a honeycomb structure cordierite having a capacity of 4 liters / piece were used as filters of a dust collector. When the pressure loss value is low and 1000 mmH 2 O or less,
Backwash air volume is around 5 liters, pressure loss value is 3000mmH
So as not to exceed the 2 O, and consumes up to 30 liters a single backwash.
【００１８】上述した例では、図６（ｂ）のグラフに基
づいて、排気ガス温度に応じて圧損上昇率が０または負
になるよう逆洗エア量を制御する場合を述べたが、図６
（ｂ）から明らかなように、一般的に排気ガス温度が高
いときは必要な逆洗エア量が少なく、排気ガス温度が低
いときは必要なエア量が多くなるため、温度計を設け、
この温度計により含塵ガスの温度および／またはフィル
タの温度を測定し、測定した温度が低い時は逆洗気流の
流量を多くするとともに、温度が高い時は流量を少なく
するよう制御することもできる。また、一般に、圧損が
高いときは必要な逆洗エア量が多く、圧損が低いときは
必要な逆洗エア量が少なくなるため、差圧計によりフィ
ルタの圧損値を検出し、検出した圧損値が高い時は逆洗
気流の流量を多くするとともに、圧損値が低い時は流量
を少なくするよう制御することもできる。なお、厚損値
が許容値よりもかなり低く厚損上昇率も小さければ、逆
洗を頻繁に行うことも必要なく、使用する逆洗エア量を
節約することができる。In the above-described example, the case where the backwash air amount is controlled based on the graph of FIG. 6B so that the pressure loss rise rate becomes zero or negative according to the exhaust gas temperature has been described.
As is apparent from (b), generally, when the exhaust gas temperature is high, the required amount of backwash air is small, and when the exhaust gas temperature is low, the required air amount is large.
This thermometer measures the temperature of the dust-containing gas and / or the temperature of the filter. When the measured temperature is low, the flow rate of the backwash air flow is increased, and when the temperature is high, the flow rate is decreased. it can. Also, in general, when the pressure loss is high, the required amount of backwash air is large, and when the pressure loss is low, the required amount of backwash air is small.Therefore, the pressure loss value of the filter is detected by a differential pressure gauge, and the detected pressure loss value is calculated. When the pressure is high, the flow rate of the backwash air flow may be increased, and when the pressure loss value is low, the flow rate may be decreased. If the thickness loss value is considerably lower than the allowable value and the rate of increase in thickness loss is small, it is not necessary to frequently perform backwashing, and the amount of backwash air used can be saved.
【００１９】図７は本発明の集塵装置の逆洗気流流量調
節装置９−１（９−２）における逆洗エア量決定の実際
の例を示すフローチャートの一例である。図７に従って
説明すると、まず温度センサ１４−１（１４−２）によ
り排気ガス温度を検出するとともに、差圧計１５により
圧損値を検出する。排気ガス温度は、含塵ガスである排
気ガスの温度を直接測定しても良く、この場合は出来る
限りフィルタの直前で測定することが望ましい。また、
フィルタ３−１（３−２）の温度を測定しても良く、こ
の場合はフィルタの排気ガス入口側中央付近もしくは周
辺部でフィルタ表面に接するように温度センサを取り付
けることが望ましい。圧損値は、フィルタ３−１（３−
２）の排気ガス供給管路１０と排気ガス排出管路１１と
の間の圧力差により求める。そして、圧損値は、排気ガ
ス温度及び正味排気ガス流量によっても変化するので、
微粒子状物質による目詰まりでの圧損上昇率を正確に把
握するため、排気ガス温度及び排気ガス流量（エンジン
回転数等のエンジン運転条件により求める）によって演
算回路で補正している。FIG. 7 is an example of a flowchart showing an actual example of determining the amount of backwash air in the backwash air flow rate adjusting device 9-1 (9-2) of the dust collecting apparatus of the present invention. Referring to FIG. 7, first, the exhaust gas temperature is detected by the temperature sensor 14-1 (14-2), and the pressure loss value is detected by the differential pressure gauge 15. The exhaust gas temperature may be measured directly by measuring the temperature of the exhaust gas that is a dust-containing gas. In this case, it is desirable to measure the temperature immediately before the filter as much as possible. Also,
The temperature of the filter 3-1 (3-2) may be measured. In this case, it is desirable to attach a temperature sensor so as to be in contact with the surface of the filter near or at the center of the exhaust gas inlet side of the filter. The pressure loss value is calculated by the filter 3-1 (3-
It is determined from the pressure difference between the exhaust gas supply line 10 and the exhaust gas discharge line 11 in 2). And since the pressure loss value also changes depending on the exhaust gas temperature and the net exhaust gas flow rate,
In order to accurately grasp the rate of increase in pressure loss due to clogging due to particulate matter, an arithmetic circuit is used to correct the exhaust gas temperature and the exhaust gas flow rate (determined based on engine operating conditions such as the engine speed).
【００２０】次に、得られた排気ガス温度及び圧損上昇
率と、予め求めておいた排気ガス温度と圧損上昇率と逆
洗エア量との関係とから、圧損値が所定の逆洗実行値と
なった時、演算回路でフィルタ３−１の次の逆洗で必要
な逆洗エア量を決定する。そして、排気遮断弁及び逆洗
エア開閉弁の状態を切り換え、集塵装置１−１と１−２
の運転状態を切り換えた後、決定した逆洗エア量をフィ
ルタ３−１に流すことで、フィルタ３−１の逆洗を行
う。なお、逆洗エア量は、コンプレッサ８−１（８−
２）によるエアタンク７−１（７−２）内の圧力により
調整することも可能であり、またエアタンク７−１（７
−２）内の圧力を図示しないレギュレータで調整するこ
とも可能である。さらに、逆洗エアは電磁弁等の逆洗エ
ア開閉弁６−１（６−２）を介して噴出されるので、逆
洗エア量は、タイマ設定による逆洗エア開閉弁６−１
（６−２）の開閉時間を調整することにより、またボー
ル弁等の場合には、弁開閉時間の調整の他に弁開閉度を
調整することにより設定できる。また、逆洗間隔につい
ては、逆洗前の圧損値から、その時点での排気ガス温度
が判っていれば、どれ位の時間でどの程度圧損値が上昇
するか予測可能なので、逆にどれ位の時間の後にどれ位
のエア量で逆洗を行えばよいか決定できる。逆洗間隔が
長ければ、当然圧損値も上昇して高くなりすぎ、逆洗時
圧損降下量を大きくする必要が生じてしまう。従って、
適切に逆洗間隔を決定することで、エア量の消費も少な
く抑えることができる。Next, based on the obtained exhaust gas temperature and pressure loss increase rate, and the relationship between the exhaust gas temperature, pressure loss increase rate, and backwash air amount obtained in advance, the pressure loss value is a predetermined backwash execution value. , The arithmetic circuit determines the amount of backwash air required for the next backwash of the filter 3-1. Then, the state of the exhaust shutoff valve and the state of the backwash air opening / closing valve are switched, and the dust collectors 1-1 and 1-2 are switched.
After the operation state is switched, backflow of the filter 3-1 is performed by flowing the determined backwash air amount to the filter 3-1. In addition, the amount of backwash air is controlled by the compressor 8-1 (8-
It is also possible to adjust the pressure by the pressure in the air tank 7-1 (7-2) according to 2).
The pressure in -2) can be adjusted by a regulator (not shown). Further, since the backwash air is jetted through the backwash air opening / closing valve 6-1 (6-2) such as a solenoid valve, the amount of backwash air is set by the timer setting of the backwash air opening / closing valve 6-1.
It can be set by adjusting the opening / closing time of (6-2), and in the case of a ball valve or the like, by adjusting the valve opening / closing degree in addition to adjusting the valve opening / closing time. For the backwashing interval, if the exhaust gas temperature at that time is known from the pressure loss value before backwashing, it is possible to predict how long the pressure loss value will increase at what point in time. After that time, it is possible to determine how much air should be backwashed. If the backwashing interval is long, the pressure loss value naturally rises and becomes too high, and it is necessary to increase the amount of pressure loss during backwashing. Therefore,
By appropriately determining the backwashing interval, the consumption of the air amount can be suppressed to be small.
【００２１】[0021]
【発明の効果】以上の説明から明らかなように、本発明
によれば、逆洗気流流量調節手段により、逆洗気流発生
装置から供給される逆洗気流の流量を、排気ガスの温度
および圧力損失に応じて時間とともに変化させることが
でき、逆洗気流の流量を所定の方法により適切に決定す
ることで、その時点で十分かつ最小の逆洗気流をフィル
タに流すことができる。そのため、例えば圧縮エアを利
用して逆洗再生を行うにあたり、エア量を可能な限り低
減しても十分な逆洗効果を得ることができる。As is apparent from the above description, according to the present invention, the flow rate of the backwashing air flow supplied from the backwashing airflow generator is controlled by the backwashing airflow rate adjusting means. It can be changed with time according to the loss, and by appropriately determining the flow rate of the backwash air flow by a predetermined method, a sufficient and minimum backwash air flow can be passed through the filter at that time. Therefore, for example, in performing backwashing regeneration using compressed air, a sufficient backwashing effect can be obtained even if the air amount is reduced as much as possible.
【００２２】また、１回あたりの逆洗気流の流量が同じ
でも、本発明によれば、逆洗間隔を長くすることができ
るため、ある所定時間内での合計エア消費量を低減する
ことができる効果もある。すなわち、ある所定の圧損値
に達した時に逆洗を行うようにし、それよりも低い圧損
値では逆洗を行わないようにする。この場合、圧損上昇
率が小さければ、逆洗間隔を長くすることが可能とな
り、合計エア消費量を低減することができる。Further, according to the present invention, even if the flow rate of the backwash air flow per time is the same, the backwash interval can be lengthened, so that the total air consumption within a certain predetermined time can be reduced. There is also an effect that can be done. That is, the backwashing is performed when a predetermined pressure loss value is reached, and the backwashing is not performed at a lower pressure loss value. In this case, if the pressure loss rise rate is small, the backwash interval can be lengthened, and the total air consumption can be reduced.
【００２３】以上のような逆洗エア量低減の効果は、エ
ア供給源であるコンプレッサの負担軽減による省エネル
ギー効果につながるとともに、自動車の燃費の向上に寄
与することができる。また、逆洗エア放出音による騒音
を低減することもできる。さらにまた、集塵装置がバ
ス、トラック等の自動車搭載用の場合には、エア供給源
のコンプレッサとして、排気ブレーキ、ドア開閉等の既
存の各種エアシステム用のコンプレッサを使用すること
が設計上あり得、大量エア消費によるそれらのシステム
への悪影響を防止することができる。The effect of reducing the amount of backwashing air as described above leads to an energy saving effect by reducing the load on the compressor serving as an air supply source, and can also contribute to an improvement in fuel efficiency of an automobile. Also, noise due to backwash air release noise can be reduced. Furthermore, when the dust collecting device is mounted on a vehicle such as a bus or a truck, there is a design in which a compressor for an existing air system such as an exhaust brake, a door opening / closing, etc. is used as a compressor of an air supply source. As a result, it is possible to prevent the system from being adversely affected by a large amount of air consumption.
【図１】本発明の集塵装置の一例の構成を示す図であ
る。FIG. 1 is a diagram showing a configuration of an example of a dust collecting device of the present invention.
【図２】本発明の集塵装置に用いるフィルタの一例の構
成を示す図である。FIG. 2 is a diagram showing a configuration of an example of a filter used in the dust collector of the present invention.
【図３】本発明の集塵装置に用いるフィルタの他の例の
構成を示す図である。FIG. 3 is a diagram showing a configuration of another example of a filter used in the dust collecting device of the present invention.
【図４】本発明の集塵装置に用いるフィルタのさらに他
の例の構成を示す図である。FIG. 4 is a diagram showing a configuration of still another example of a filter used in the dust collector of the present invention.
【図５】本発明における厚損上昇率の定義を説明するた
めのグラフである。FIG. 5 is a graph for explaining the definition of the thickness loss increasing rate in the present invention.
【図６】（ａ）は圧損上昇率の状態を説明するためのグ
ラフ、（ｂ）は排気ガス温度と圧損上昇率と逆洗エア量
との関係を示すグラフである。FIG. 6A is a graph for explaining a state of a pressure loss increase rate, and FIG. 6B is a graph showing a relationship among an exhaust gas temperature, a pressure loss increase rate, and a backwash air amount.
【図７】本発明の集塵装置の逆洗気流流量調節装置にお
ける逆洗エア量決定の実際の一例を示すフローチャート
である。FIG. 7 is a flowchart showing an example of an actual determination of the amount of backwash air in the backwash air flow rate adjusting device of the dust collector according to the present invention.
１−１、１−２ 集塵装置、２−１、２−２ 缶体、３
−１、３−２ フィルタ、４−１、４−２ 逆洗気流発
生装置、５−１、５−２ 管路、６−１、６−２逆洗エ
ア開閉弁、７−１、７−２ エアタンク、８−１、８−
２ コンプレッサ、９−１、９−２ 逆洗気流流量調節
装置、１０ 排気ガス供給管路、１１排気ガス排出管
路、１２−１、１２−２ 管路、１３−１、１３−２
スートタンク、１４−１、１４−２ 温度センサ、１５
差圧計、１６−１、１６−２、１７−１、１７−２
排気遮断弁1-1, 1-2 Dust collector, 2-1, 2-2 can body, 3
-1, 3-2 Filter, 4-1 and 4-2 Backwash air flow generator, 5-1 and 5-2 pipe, 6-1 and 6-2 Backwash air opening / closing valve, 7-1 and 7- 2 Air tank, 8-1, 8-
2 Compressor, 9-1, 9-2 Backwash air flow control device, 10 Exhaust gas supply line, 11 Exhaust gas discharge line, 12-1, 12-2 Line, 13-1, 13-2
Soot tank, 14-1, 14-2 temperature sensor, 15
Differential pressure gauge, 16-1, 16-2, 17-1, 17-2
Exhaust shutoff valve
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−146863（ＪＰ，Ａ) 特開 平５−44431（ＪＰ，Ａ) 実開 平６−49718（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F01N 3/02 301 - 341 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-1466863 (JP, A) JP-A-5-44431 (JP, A) JP-A-6-49718 (JP, U) (58) Survey Field (Int.Cl. 7 , DB name) F01N 3/02 301-341
Claims (7)
去するフィルタと、該フィルタにおける含塵ガス流れと
は逆向きに該フィルタを通過する清浄なガスの流れを発
生せしめる逆洗気流発生装置とを備えた集塵装置におい
て、前記フィルタの圧力損失を検出する圧力検出手段を
有し、前記逆洗気流発生装置が、前記圧力検出手段で求
めた圧力損失に基づき、前記圧力損失検出手段で検出さ
れた圧力損失が高い時には逆洗気流の流量を多く、また
前記圧力損失検出手段で検出された圧力損失が低い時に
は逆洗気流の流量を少なくするよう調整する逆洗気流流
量調節手段を有することを特徴とする集塵装置。1. A filter for collecting and removing particulate matter contained in a dust-containing gas, and a backwash for generating a flow of a clean gas passing through the filter in a direction opposite to a flow of the dust-containing gas in the filter. A dust collector comprising an airflow generator and a pressure detector for detecting pressure loss of the filter, wherein the backwash airflow generator generates the pressure loss based on the pressure loss obtained by the pressure detector. When the pressure loss detected by the detection means is high, the flow rate of the backwash air flow is large, and when the pressure loss detected by the pressure loss detection means is low, the flow rate of the backwash air flow is adjusted to be small. A dust collecting device comprising means.
画された多数のセルを有するハニカム構造であり、所定
のセルについては一方の端部を封じ、残余のセルについ
ては他方の端部を封じてなる構造を有する請求項１記載
の集塵装置。2. The filter according to claim 1, wherein the filter has a honeycomb structure having a large number of cells partitioned by partition walls having filtering ability. One end of a predetermined cell is sealed, and the other end of a remaining cell is sealed. The dust collector according to claim 1, wherein the dust collector has a sealed structure.
方の端面から他方の端面へ貫通する相互に平行な貫通孔
を有する平板状のフィルタエレメントを、複数枚積層し
てなる構造を有する請求項１記載の集塵装置。3. The filter has a structure in which a plurality of flat filter elements having mutually parallel through holes penetrating from one end face of a pair of opposed end faces to the other end face are stacked. Item 1. A dust collector according to Item 1.
燃機関から排出される黒鉛等の微粒子状物質を含んだ高
温の排気ガスであり、前記フィルタが、耐熱性、耐酸化
性、耐熱衝撃性を有するセラミック材料あるいは金属材
料からなる請求項１〜３のいずれか１項に記載の集塵装
置。4. The high temperature exhaust gas containing particulate matter such as graphite discharged from an internal combustion engine such as a diesel engine, wherein the filter contains heat resistance, oxidation resistance, and thermal shock resistance. The dust collector according to any one of claims 1 to 3, wherein the dust collector is made of a ceramic material or a metal material having the following.
温度の少なくとも一方を検出する温度検出手段を有し、
前記逆洗気流流量調節手段により、前記温度検出手段で
検出された温度が低い時には逆洗気流の流量を多く、前
記温度検出手段で検出された温度が高い時には逆洗気流
の流量を少なくするよう調整する請求項１〜４のいずれ
か１項に記載の集塵装置。5. A temperature detecting means for detecting at least one of the temperature of the dust-containing gas and the temperature of the filter,
By the backwash air flow rate adjusting means, the flow rate of the backwash air flow is increased when the temperature detected by the temperature detection means is low, and the flow rate of the backwash air flow is decreased when the temperature detected by the temperature detection means is high. The dust collector according to claim 1, wherein the dust collector is adjusted.
と、前記圧力損失検出手段で検出された圧力損失の経時
的変化から求めた圧損上昇率と、流すべき逆洗気流の流
量との関係を予め求めておき、実際の調整にあたって
は、前記逆洗流量調節手段により、前記温度検出手段で
求めた排気ガス温度に応じて、前記圧損上昇率が０また
は負となるよう、前記予め求めた関係から逆洗気流の流
量を決定するよう調整する請求項５記載の集塵装置。6. A relationship between an exhaust gas temperature detected by said temperature detecting means, a pressure loss increasing rate obtained from a temporal change of a pressure loss detected by said pressure loss detecting means, and a flow rate of a backwash air flow to be flowed. In the actual adjustment, the backwash flow rate adjusting means is determined in advance so that the pressure loss increase rate is 0 or negative according to the exhaust gas temperature determined by the temperature detecting means. The dust collector according to claim 5, wherein the dust collector is adjusted so as to determine the flow rate of the backwash air flow from the relationship.
噴出時間の長短により調節する方法および逆洗気流の噴
出圧力の高低により調節する方法のうち、少なくとも一
方の方法である請求項１〜６のいずれか１項に記載の集
塵装置。7. The backwash air flow rate adjusting means is at least one of a method of adjusting the length of time for jetting the backwash air flow and a method of adjusting the jet pressure of the backwash air flow. The dust collector according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7034902A JP3014940B2 (en) | 1995-02-23 | 1995-02-23 | Dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7034902A JP3014940B2 (en) | 1995-02-23 | 1995-02-23 | Dust collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08232638A JPH08232638A (en) | 1996-09-10 |
| JP3014940B2 true JP3014940B2 (en) | 2000-02-28 |
Family
ID=12427126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7034902A Expired - Fee Related JP3014940B2 (en) | 1995-02-23 | 1995-02-23 | Dust collector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3014940B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819035B (en) * | 2015-05-03 | 2017-05-10 | 邵阳学院 | Back flushing regeneration device of diesel particulate filters |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6609372B2 (en) * | 1998-04-15 | 2003-08-26 | Caterpillar Inc | Method and apparatus for controlling the temperature of an engine |
| JP2012177374A (en) * | 2006-10-17 | 2012-09-13 | Ibiden Co Ltd | Exhaust emission control device |
| JP2008101604A (en) * | 2006-10-17 | 2008-05-01 | Ibiden Co Ltd | Exhaust emission control device |
-
1995
- 1995-02-23 JP JP7034902A patent/JP3014940B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819035B (en) * | 2015-05-03 | 2017-05-10 | 邵阳学院 | Back flushing regeneration device of diesel particulate filters |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08232638A (en) | 1996-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109404107B (en) | Diesel particulate filter carbon loading estimation method | |
| JP4042476B2 (en) | Exhaust gas purification device for internal combustion engine | |
| JP3336750B2 (en) | Method for regenerating particulate collection filter and exhaust gas purifying device provided with particulate collection filter | |
| US7866146B2 (en) | Exhaust gas purifying apparatus, exhaust gas purifying method, and particulate matter measuring method | |
| JP4325367B2 (en) | Exhaust temperature sensor failure detection device | |
| US8608835B2 (en) | Exhaust gas purification system for an internal combustion engine | |
| EP0411445B1 (en) | Regeneratable particulate filter trap system | |
| US7658064B2 (en) | Exhaust gas purifying apparatus | |
| US7891176B2 (en) | Exhaust gas purifying apparatus | |
| US5024054A (en) | Engine exhaust system with sequential loading of multiple filters | |
| JP2008101606A (en) | Particulate detection sensor | |
| KR100899967B1 (en) | Exhaust gas purifying apparatus | |
| WO2004015249A1 (en) | Filter control method and device | |
| US20080087101A1 (en) | Particulate matter sensor | |
| US4986069A (en) | Engine exhaust particle trap captured mass sensor | |
| US20060168951A1 (en) | Regeneration management system for a work machine | |
| JP2886799B2 (en) | Dust collector | |
| JP3014940B2 (en) | Dust collector | |
| EP1950385B1 (en) | Exhaust gas purification device | |
| JPH07224636A (en) | Exhaust emission control device for internal combustion engine | |
| JP4352745B2 (en) | Exhaust gas purification device for internal combustion engine | |
| JPH0122447B2 (en) | ||
| JP3114357B2 (en) | Exhaust filter regeneration device | |
| JP2878113B2 (en) | Backwashing particulate collection equipment | |
| JP2003090209A (en) | Exhaust emission control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19991116 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081217 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081217 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091217 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091217 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101217 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111217 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121217 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131217 Year of fee payment: 14 |
|
| LAPS | Cancellation because of no payment of annual fees |