JPH04288405A - Method of controlling quantity of discharged dioxine in incineration facilities - Google Patents
Method of controlling quantity of discharged dioxine in incineration facilitiesInfo
- Publication number
- JPH04288405A JPH04288405A JP3051227A JP5122791A JPH04288405A JP H04288405 A JPH04288405 A JP H04288405A JP 3051227 A JP3051227 A JP 3051227A JP 5122791 A JP5122791 A JP 5122791A JP H04288405 A JPH04288405 A JP H04288405A
- Authority
- JP
- Japan
- Prior art keywords
- dust collector
- temperature
- concentration
- dioxin
- inlet
- 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.)
- Withdrawn
Links
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 10
- 239000000428 dust Substances 0.000 claims abstract description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000779 smoke Substances 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、都市ごみ焼却設備や
産業廃棄物焼却設備などの焼却設備におけるダイオキシ
ン排出量制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling dioxin emissions in incineration facilities such as municipal waste incineration facilities and industrial waste incineration facilities.
【０００２】0002
【従来の技術】この種の焼却設備においては、焼却炉出
口に水噴射式またはボイラ式のガス冷却塔や調温塔など
よりなる冷却装置が接続され、冷却装置出口にバグフィ
ルタや電気集塵機を用いた集塵装置が接続されている。[Prior Art] In this type of incinerator, a cooling device consisting of a water injection type or boiler type gas cooling tower or a temperature control tower is connected to the incinerator outlet, and a bag filter or an electrostatic precipitator is connected to the cooling device outlet. The dust collector used is connected.
【０００３】そして、従来の焼却設備では、集塵装置入
口温度が常に一定になるように、冷却装置で排ガスの温
度が制御されている。[0003] In conventional incineration equipment, the temperature of the exhaust gas is controlled by a cooling device so that the temperature at the inlet of the dust collector is always constant.
【０００４】0004
【発明が解決しようとする課題】上記のように、従来の
焼却設備では、集塵装置入口温度が常に一定になるよう
に制御されているだけであるから、ダイオキシン排出量
が変化してもこれを調整することができない。[Problems to be Solved by the Invention] As mentioned above, in conventional incineration equipment, the temperature at the inlet of the dust collector is always controlled to be constant, so even if the amount of dioxin emissions changes, this does not change. cannot be adjusted.
【０００５】バグフィルタでのダイオキシンの除去効率
または電気集塵機でのダイオキシンの濃度変化は温度に
より大きく左右され、温度が低いほどダイオキシン排出
量が少なくなる。The removal efficiency of dioxin in a bag filter or the change in concentration of dioxin in an electrostatic precipitator is greatly influenced by temperature, and the lower the temperature, the lower the amount of dioxin discharged.
【０００６】したがって、ダイオキシン排出量を少なく
するだけであれば、集塵装置入口温度を低めに設定して
おけばよいが、温度が低いほど、白煙が生じやすくなる
ほか、触媒脱硝装置が設置されている場合にはＮＯｘ
の除去効果が低下し、ＮＯｘ 排出量が多くなる。Therefore, if only the amount of dioxin emissions is to be reduced, it is sufficient to set the dust collector inlet temperature to a low value, but the lower the temperature, the more likely it is that white smoke will be generated, and the installation of a catalytic denitrification device will be difficult. NOx
The removal effect of NOx decreases, and the amount of NOx emissions increases.
【０００７】この発明の目的は、上記の問題を解決し、
ダイオキシン排出量を一定値以下にするとともに、白煙
防止やＮＯｘ 除去の効果も高められるダイオキシン排
出量の制御方法を提供することにある。[0007] The purpose of the present invention is to solve the above problems,
It is an object of the present invention to provide a method for controlling the amount of dioxin emissions, which can reduce the amount of dioxin emissions to a certain value or less and also improve the effects of white smoke prevention and NOx removal.
【０００８】[0008]
【課題を解決するための手段】この発明によるダイオキ
シン排出量の制御方法は、焼却炉出口側にガス冷却装置
を介して集塵装置が接続されている焼却設備において、
焼却炉出口または集塵装置出口の一酸化炭素（ＣＯ）濃
度を測定し、この測定値に応じて集塵装置入口温度を制
御するものである。[Means for Solving the Problems] A method for controlling dioxin emissions according to the present invention is provided in an incineration facility in which a dust collector is connected to the incinerator outlet side via a gas cooling device.
The carbon monoxide (CO) concentration at the incinerator outlet or the dust collector outlet is measured, and the dust collector inlet temperature is controlled according to this measured value.
【０００９】集塵装置入口温度の制御方法としては、た
とえばガス冷却装置での水噴射量を変えたり、冷却用空
気量を変えたりする方法がある。[0009] As a method of controlling the temperature at the inlet of the dust collector, for example, there is a method of changing the amount of water jetted in the gas cooling device or changing the amount of cooling air.
【００１０】0010
【作用】焼却炉出口または集塵装置出口のＣＯ濃度とダ
イオキシン濃度との間には一定の相関関係があり、ＣＯ
濃度が高くなるとダイオキシン濃度も高くなる。したが
って、ＣＯ濃度が高くなると集塵装置入口温度を下げ、
ＣＯ濃度が低くなると集塵装置入口温度を上げるように
することにより、ダイオキシン排出量を一定値以下にす
ることができる。[Effect] There is a certain correlation between the CO concentration at the incinerator outlet or the dust collector outlet and the dioxin concentration.
As the concentration increases, so does the dioxin concentration. Therefore, when the CO concentration increases, the temperature at the dust collector inlet is lowered,
When the CO concentration decreases, by increasing the temperature at the dust collector inlet, the amount of dioxin discharged can be kept below a certain value.
【００１１】また、ＣＯ濃度が低くなると集塵装置入口
温度を上げるので、集塵装置入口温度が必要以上に低く
なることがなく、温度低下による白煙の発生やＮＯｘ
除去効果の低下を防止することができる。[0011] Furthermore, since the temperature at the inlet of the dust collector is raised when the CO concentration becomes low, the temperature at the inlet of the dust collector does not become lower than necessary, and the generation of white smoke and NOx due to the temperature drop are avoided.
Deterioration of the removal effect can be prevented.
【００１２】0012
【実施例】以下、図面を参照して、この発明の実施例に
ついて説明する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
【００１３】図１は、水噴射式焼却設備におけるダイオ
キシン排出量制御方法のフローを示している。FIG. 1 shows the flow of a method for controlling the amount of dioxin discharged in a water injection incinerator.
【００１４】図１において、焼却炉（１） の出口（１
ａ）から排出された排ガスは、水噴射式ガス冷却塔（冷
却装置）（２） に通されたのち、バグフィルタや電気
集塵機を用いた集塵装置（３） で集塵処理され、図示
しない煙突から大気中へ放散される。In FIG. 1, the outlet (1) of the incinerator (1)
The exhaust gas discharged from a) is passed through a water injection type gas cooling tower (cooling device) (2), and then collected by a dust collector (3) using a bag filter or an electric precipitator (not shown). Dissipated into the atmosphere from chimneys.
【００１５】冷却塔（２） には冷却水噴射装置（４）
が設けられ、噴射装置（４） には冷却水噴射量を制
御するための制御弁（５） が設けられている。A cooling water injection device (4) is installed in the cooling tower (2).
The injection device (4) is provided with a control valve (5) for controlling the amount of cooling water injected.
【００１６】焼却炉出口（１ａ）に、この部分における
ＣＯ濃度を測定するＣＯ濃度測定器（６）が設けられて
いる。A CO concentration measuring device (6) for measuring the CO concentration in this part is provided at the incinerator outlet (1a).
【００１７】集塵装置（３） の入口（３ａ）の部分に
、ＣＯ濃度測定器（６） のＣＯ濃度測定値に応じて集
塵装置入口温度を制御する制御装置（７） が設けられ
ている。A control device (7) is provided at the inlet (3a) of the dust collector (3) to control the temperature at the inlet of the dust collector in accordance with the CO concentration measured by the CO concentration measuring device (6). There is.
【００１８】制御装置（７） による集塵装置入口温度
の制御は、ＣＯ濃度測定値が大きくなると集塵装置入口
温度が低くなるように、弁（５） の開度を制御して冷
却水の噴射量を制御することにより行なう。The control device (7) controls the temperature at the inlet of the dust collector by controlling the opening degree of the valve (5) so that the temperature at the inlet of the dust collector decreases as the measured CO concentration increases. This is done by controlling the injection amount.
【００１９】焼却炉出口（１ａ）のＣＯ濃度とダイオキ
シン濃度との間には一定の相関関係があり、ＣＯ濃度が
高くなるとダイオキシン濃度も高くなる。また、排ガス
の温度が低くなると、集塵装置（３） でのダイオキシ
ンの除去効率が高くなる。したがって、上記のように、
ＣＯ濃度が高くなると集塵装置入口温度を下げてダイオ
キシンの除去効率を高め、ＣＯ濃度が低くなると集塵装
置入口温度を上げてダイオキシンの除去効率を低めるよ
うにすることにより、ダイオキシン排出量を一定値以下
にすることができる。There is a certain correlation between the CO concentration and the dioxin concentration at the incinerator outlet (1a), and as the CO concentration increases, the dioxin concentration also increases. Furthermore, as the temperature of the exhaust gas decreases, the efficiency of removing dioxin in the dust collector (3) increases. Therefore, as mentioned above,
When the CO concentration increases, the temperature at the dust collector inlet is lowered to increase the dioxin removal efficiency, and when the CO concentration decreases, the dust collector inlet temperature is raised to lower the dioxin removal efficiency, thereby keeping the amount of dioxin emissions constant. It can be less than or equal to the value.
【００２０】また、ＣＯ濃度が低くなると集塵装置入口
温度を上げるので、集塵装置入口温度が必要以上に低く
なることがなく、温度低下による白煙の発生やＮＯｘ
除去効果の低下を防止することができる。[0020] Furthermore, since the temperature at the inlet of the dust collector is raised when the CO concentration becomes low, the temperature at the inlet of the dust collector does not become lower than necessary, and the generation of white smoke and NOx due to the temperature drop are prevented.
Deterioration of the removal effect can be prevented.
【００２１】焼却炉出口（１ａ）のＣＯ濃度を測定する
かわりに、図１に鎖線で示すように、集塵装置（３）
の出口（３ｂ）にＣＯ濃度測定器（８） を設け、その
ＣＯ濃度測定値に応じて、集塵装置入口温度を制御する
ようにしてもよい。Instead of measuring the CO concentration at the incinerator outlet (1a), the dust collector (3) is used as shown by the chain line in FIG.
A CO concentration measuring device (8) may be provided at the outlet (3b) of the dust collector, and the dust collector inlet temperature may be controlled according to the CO concentration measurement value.
【００２２】この場合、上記と同様に集塵装置入口温度
をＣＯ濃度測定値が大きくなると低くなるようなＣＯ濃
度測定値に応じた値になるように制御してもよいし、Ｃ
Ｏ濃度測定値が一定の範囲内に入るように集塵装置入口
温度を制御してもよい。後者の場合、ＣＯ濃度測定値が
一定の範囲内に入ることにより、ダイオキシン排出量が
一定の範囲内に保たれる。In this case, similarly to the above, the temperature at the entrance of the dust collector may be controlled to a value corresponding to the measured value of CO concentration, such that the temperature decreases as the measured value of CO concentration increases;
The dust collector inlet temperature may be controlled so that the measured O concentration falls within a certain range. In the latter case, by keeping the measured CO concentration within a certain range, the amount of dioxin emissions is kept within a certain range.
【００２３】図２は、ボイラ式焼却設備におけるダイオ
キシン排出量制御方法のフローを示している。FIG. 2 shows the flow of a method for controlling the amount of dioxin discharged in a boiler type incineration facility.
【００２４】図２の場合、図１の水噴射式ガス冷却塔（
２） のかわりにボイラ式ガス冷却塔（冷却装置）（９
） が設けられ、この冷却塔（９） に温度制御用の冷
却水噴射装置（４）が設けられている。他は図１の実施
例の場合と同様であり、同じ部分には同一の符号を付し
ている。In the case of FIG. 2, the water injection type gas cooling tower (
2) Instead of a boiler-type gas cooling tower (cooling device) (9
) is provided, and this cooling tower (9) is provided with a cooling water injection device (4) for temperature control. The rest is the same as in the embodiment shown in FIG. 1, and the same parts are given the same reference numerals.
【００２５】[0025]
【発明の効果】この発明の焼却設備におけるダイオキシ
ン排出量の制御方法によれば、上述のように、ダイオキ
シン排出量を一定値以下にすることができ、しかも白煙
防止やＮＯｘ 除去の効果も高めることができる。[Effects of the Invention] According to the method for controlling dioxin emissions in incineration equipment of the present invention, as described above, the dioxin emissions can be kept below a certain value, and the effects of white smoke prevention and NOx removal are also enhanced. be able to.
【図１】この発明の実施例を示す水噴射式焼却設備にお
けるダイオキシン排出量制御のフローシートである。FIG. 1 is a flow sheet for controlling the amount of dioxin discharged in a water injection incineration facility showing an embodiment of the present invention.
【図２】この発明の他の実施例を示すボイラ式焼却設備
におけるダイオキシン排出量制御のフローシートである
。FIG. 2 is a flow sheet for controlling the amount of dioxin discharged in a boiler-type incineration facility showing another embodiment of the present invention.
（１） 焼却炉
（１ａ） 焼却炉出口（２）
水噴射式ガス冷却塔（冷却装置）（３
） 集塵装置（３ａ）
集塵装置入口（３ｂ）
集塵装置出口（４） 冷却水噴射
装置（５） 制御弁(1) Incinerator (1a) Incinerator outlet (2)
Water injection type gas cooling tower (cooling device) (3
) Dust collector (3a)
Dust collector inlet (3b)
Dust collector outlet (4) Cooling water injection device (5) Control valve
Claims (1)
装置が接続されている焼却設備において、焼却炉出口ま
たは集塵装置出口の一酸化炭素濃度を測定し、この測定
値に応じて集塵装置入口温度を制御する焼却設備におけ
るダイオキシン排出量制御方法。Claim 1: In an incineration facility in which a dust collector is connected to the incinerator outlet side via a gas cooling device, the carbon monoxide concentration at the incinerator outlet or the dust collector outlet is measured, and the carbon monoxide concentration is determined based on this measured value. A method for controlling dioxin emissions in incineration equipment by controlling the temperature at the inlet of a dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3051227A JPH04288405A (en) | 1991-03-15 | 1991-03-15 | Method of controlling quantity of discharged dioxine in incineration facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3051227A JPH04288405A (en) | 1991-03-15 | 1991-03-15 | Method of controlling quantity of discharged dioxine in incineration facilities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04288405A true JPH04288405A (en) | 1992-10-13 |
Family
ID=12881066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3051227A Withdrawn JPH04288405A (en) | 1991-03-15 | 1991-03-15 | Method of controlling quantity of discharged dioxine in incineration facilities |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04288405A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025078A1 (en) | 1996-12-06 | 1998-06-11 | Nkk Corporation | Burning apparatus and method for restricting the occurrence of dioxins |
| FR2785976A1 (en) * | 1998-11-17 | 2000-05-19 | Air Liquide | WASTE COMBUSTION PROCESS FOR REDUCING DIOXIN EMISSIONS |
| JP2008025928A (en) * | 2006-07-21 | 2008-02-07 | Nippon Steel Engineering Co Ltd | Boiler with built-in gas cooling chamber |
-
1991
- 1991-03-15 JP JP3051227A patent/JPH04288405A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025078A1 (en) | 1996-12-06 | 1998-06-11 | Nkk Corporation | Burning apparatus and method for restricting the occurrence of dioxins |
| US6189461B1 (en) | 1996-12-06 | 2001-02-20 | Nkk Corporation | Burning apparatus and method for restricting the occurrence of dioxins |
| US6435113B1 (en) | 1996-12-06 | 2002-08-20 | Nkk Corporation | Incineration apparatus and method which suppress generation of dioxins |
| FR2785976A1 (en) * | 1998-11-17 | 2000-05-19 | Air Liquide | WASTE COMBUSTION PROCESS FOR REDUCING DIOXIN EMISSIONS |
| EP1002996A1 (en) * | 1998-11-17 | 2000-05-24 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Waste burning process reducing dioxine emissions |
| JP2008025928A (en) * | 2006-07-21 | 2008-02-07 | Nippon Steel Engineering Co Ltd | Boiler with built-in gas cooling chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980514 |