JPS6255054B2 - - Google Patents
Info
- Publication number
- JPS6255054B2 JPS6255054B2 JP4524778A JP4524778A JPS6255054B2 JP S6255054 B2 JPS6255054 B2 JP S6255054B2 JP 4524778 A JP4524778 A JP 4524778A JP 4524778 A JP4524778 A JP 4524778A JP S6255054 B2 JPS6255054 B2 JP S6255054B2
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- temperature
- empty
- ash
- incinerating
- 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
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 22
- 229910021529 ammonia Inorganic materials 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 40
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 9
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 9
- 235000011130 ammonium sulphate Nutrition 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Incineration Of Waste (AREA)
- Gasification And Melting Of Waste (AREA)
Description
【発明の詳細な説明】
＜産業上の利用分野＞
この発明はアンモニア成分を含有する物質、例
えば発電所のボイラ等の燃焼装置の排ガス流路に
設けた集塵装置で捕集したアンモニア成分含有の
捕集灰を流動層を使用して好適かつ窒素酸化物の
排出のない焼却処理をする方法に関する。[Detailed Description of the Invention] <Industrial Application Field> This invention is directed to the use of ammonia-containing substances, such as ammonia-containing substances collected by a dust collector installed in the exhaust gas flow path of a combustion device such as a boiler in a power plant. This invention relates to a method for incinerating collected ash using a fluidized bed in a suitable manner and without emitting nitrogen oxides.
＜従来の技術及びその問題点＞
近時発電所等のボイラにおいては排ガス中の窒
素酸化物（以下NOxと称す）を低減させるため
にする二段燃焼方法その他の低O2燃焼手段によ
る燃焼が行なわれることにより未燃カーボン量の
増大と、NOxや硫黄酸化物（SOx）の除去のため
にする還元剤、例えばアンモニア（NH3）を噴霧
供給することによる捕集灰中の硫安
〔（NH4）2SO4〕量の増大との問題を生じている。従
つてこの硫安を含む捕集灰（以下EP灰と称す）
を焼却炉で焼却処理することが行なわれている。
しかしその際硫安が分解の過程で溶融し焼却炉と
して流動層炉を使用の場合には流動媒体を小塊と
し流動不良を生じさせたり、炉壁に付着し所謂ク
リンカトラブルと称する炉の運転上の種々の困難
な問題を生じさせている。また炉の運転条件によ
つてはNH3の酸化によりNOxを生じその処理をせ
ねばならない。<Conventional technology and its problems> Recently, in boilers of power plants, etc., combustion using a two-stage combustion method and other low O 2 combustion methods to reduce nitrogen oxides (hereinafter referred to as NOx) in exhaust gas has been adopted. By spraying a reducing agent such as ammonia (NH 3 ) to remove NOx and sulfur oxides (SOx), ammonium sulfate [(NH 4 ) 2 SO 4 ] This is causing a problem with the increase in the amount. Therefore, this collected ash containing ammonium sulfate (hereinafter referred to as EP ash)
is incinerated in an incinerator.
However, ammonium sulfate melts during the decomposition process, and when a fluidized bed furnace is used as an incinerator, the fluidized medium becomes small clumps, causing poor flow or adhering to the furnace walls, causing so-called clinker trouble. This has given rise to various difficult problems. Also, depending on the operating conditions of the furnace, oxidation of NH 3 generates NOx, which must be disposed of.
＜発明の目的＞
この発明は流動層焼却装置を用い所謂クリンカ
トラブルがなく、かつNOxの排出のないアンモ
ニア成分含有物質焼却方法を提案することを目的
とする。<Object of the invention> The object of the present invention is to propose a method for incinerating ammonia component-containing substances using a fluidized bed incinerator, which is free from so-called clinker troubles and which does not emit NOx.
＜手段の概要＞
要するにこの発明は、流動層焼却装置でアンモ
ニア含有物質を焼却するに際し、流動層内に位置
する助燃バーナの燃料流量と、流動層直上の空塔
部の下方に位置する空塔バーナの燃料流量を制御
することにより、流動層内温度よりも流動層直上
面近傍の空塔部内温度を高くするように制御する
アンモニア成分含有物質焼却方法であることを特
徴とする。<Summary of the Means> In short, the present invention, when incinerating ammonia-containing substances in a fluidized bed incinerator, reduces the fuel flow rate of the auxiliary combustion burner located in the fluidized bed and the empty tower burner located below the empty column directly above the fluidized bed. The present invention is characterized in that it is a method for incinerating a substance containing an ammonia component, in which the temperature inside the empty column in the vicinity of the surface directly above the fluidized bed is controlled to be higher than the temperature inside the fluidized bed by controlling the fuel flow rate.
＜実施例＞
この発明の実施にかかる装置の構造を、アンモ
ニア成分含有物質としてEP灰を例にとり以下図
面により説明する。流動層焼却炉１は下部に燃焼
用と流動用空気を供給する空気室２をもち、多孔
板３上には砂等の流動媒体４が収容され、流動用
空気により流動層５を形成する。この流動層は図
示しない起動バーナにより加熱され一定温度に達
したとき、EP灰を収容するホツパ６からフイー
ダ（ロータリフイーダ等）７、シユート８、ノズ
ル８ａを経由してEP灰が流動層内に供給され
る。また流動層内に位置する助燃バーナ９と流動
層直上の空塔部の下方部に位置する空塔部バーナ
１０が夫々複数本設けられている。<Example> The structure of an apparatus according to the present invention will be explained below with reference to the drawings, taking EP ash as an example of the ammonia component-containing substance. The fluidized bed incinerator 1 has an air chamber 2 in its lower part for supplying combustion and fluidizing air, and a fluidized medium 4 such as sand is accommodated on a perforated plate 3 to form a fluidized bed 5 with the fluidizing air. This fluidized bed is heated by a starting burner (not shown), and when it reaches a certain temperature, EP ash enters the fluidized bed from a hopper 6 that accommodates the EP ash via a feeder (rotary feeder, etc.) 7, a chute 8, and a nozzle 8a. is supplied to Further, a plurality of auxiliary combustion burners 9 located within the fluidized bed and a plurality of empty tower burners 10 located below the empty tower directly above the fluidized bed are provided.
流動層内温度はカーボンの着火温度、硫安の分
解温度以上で、かつNOx発生が少なくまた硫安
の溶融によるクリンカトラブルの生じない温度例
えばほぼ580〜600℃に保持し、流動層直上面近傍
の空塔部温度をNO（一酸化窒素）やNH3によつ
て気相還元脱硝が好適に行なわれる温度、例えば
ほぼ690〜710℃に保持し、EP灰中に含まれる硫
安分解によるNH3が酸化されNOx（窒素酸化物）
を発生することのないようにする。 The temperature inside the fluidized bed is maintained at a temperature above the ignition temperature of carbon and the decomposition temperature of ammonium sulfate, and at a temperature that generates little NOx and does not cause clinker trouble due to melting of ammonium sulfate, for example, approximately 580 to 600°C. The tower temperature is maintained at a temperature at which gas-phase reductive denitrification is suitably performed using NO (nitric oxide) and NH 3 , for example approximately 690 to 710°C, and NH 3 from the decomposition of ammonium sulfate contained in EP ash is oxidized. NOx (nitrogen oxides)
prevent this from occurring.
このような流動層焼却炉でEP灰を焼却すると
き上記の温度制御を適切にするため、流動層の温
度を検知し信号を出す温度発信器１１と空塔部の
温度を計測し信号を出す温度発信器１２とが流動
層焼却炉の炉壁に設けられ、これらの信号は制御
箱１３に送られる。またこの流動層焼却炉１の多
孔板３にはその通気孔の使用孔数をプラグ又は当
板により制御する装置１４が複数個設けられ、こ
れらの駆動モータを制御することにより流動層内
へ流入する空気量はきめ細い制御がされ流動層内
温度と空塔部の温度制御をより容易にするもので
ある。 When incinerating EP ash in such a fluidized bed incinerator, in order to properly control the temperature described above, there is a temperature transmitter 11 that detects the temperature of the fluidized bed and outputs a signal, and a temperature transmitter 11 that measures the temperature of the empty column and outputs a signal. A temperature transmitter 12 is provided on the furnace wall of the fluidized bed incinerator, and these signals are sent to a control box 13. In addition, the perforated plate 3 of the fluidized bed incinerator 1 is provided with a plurality of devices 14 that control the number of ventilation holes used by plugs or plates, and by controlling these drive motors, the flow into the fluidized bed is controlled. The amount of air used is precisely controlled, making it easier to control the temperature inside the fluidized bed and the temperature in the empty column.
制御箱１３は前記の温度信号を受け、記憶装置
により各制御弁の開度、EP灰の供給量の制御を
する。制御指令はホツパ６、フイーダ７、シユー
ト８、ノズル８ａよりなるEP灰の供給装置にあ
つてはフイーダ７の駆動用モータに出される。燃
料の供給については空塔部バーナ１０の制御弁１
５、助燃バーナについては制御弁１６に指令が出
され、施回噴流用空気については制御弁１７、主
供給空気量についてはダンパ１８に制御指令が出
される。 The control box 13 receives the temperature signal and controls the opening degree of each control valve and the supply amount of EP ash using a storage device. Control commands are issued to the drive motor of the feeder 7 in the case of the EP ash supply device consisting of the hopper 6, feeder 7, chute 8, and nozzle 8a. Regarding fuel supply, the control valve 1 of the sky burner 10
5. A command is issued to the control valve 16 for the auxiliary combustion burner, a control command is issued to the control valve 17 for the recirculating jet air, and a control command is issued to the damper 18 for the main supply air amount.
また不活性ガスを管路１９、制御弁２０よりミ
キサ２１に供給するときには制御弁２０に制御箱
１３より制御指令が出される。 Further, when inert gas is supplied to the mixer 21 through the conduit 19 and the control valve 20, a control command is issued to the control valve 20 from the control box 13.
＜効果＞
この発明を実施することにより流動層内の温度
と空塔部の温度は適切に保持され、流動層の流動
停止の事故も生ぜず、また排ガス中のNOxも適
切に低減されることとなる。即ち流動層内温度は
カーボンの着火温度、硫安の分解温度以上で、か
つNOx発生が少なくまた硫安の溶融によるクリ
ンカトラブルの生じない温度例えばほぼ580〜600
℃に保持され流動層直上の空塔部温度をNO（一
酸化窒素）やNH3によつて気相還元脱硝が行なわ
れる温度、例えばほぼ690〜710℃に保持され、
EP灰中に含まれる硫安分解によるNH3が酸化さ
れNOx（窒素酸化物）を発生することのない燃
焼がされ、流動層炉を排ガスにNOxのない状態
で連続運転ができるという効果を奏するものであ
る。<Effects> By implementing this invention, the temperature within the fluidized bed and the temperature in the empty column can be appropriately maintained, accidents such as fluidized bed stoppage will not occur, and NOx in exhaust gas will be appropriately reduced. becomes. That is, the temperature in the fluidized bed is higher than the ignition temperature of carbon and the decomposition temperature of ammonium sulfate, and the temperature that generates little NOx and does not cause clinker trouble due to melting of ammonium sulfate, for example, approximately 580 to 600.
The temperature of the superficial column directly above the fluidized bed is maintained at a temperature at which gas-phase reductive denitrification is performed using NO (nitric oxide) and NH3 , for example approximately 690 to 710°C,
NH 3 contained in EP ash is oxidized by decomposition of ammonium sulfate, and combustion occurs without generating NOx (nitrogen oxides), making it possible to operate the fluidized bed furnace continuously without NOx in the exhaust gas. It is.
第１図はこの発明にかかる装置の配置と系統を
示す図面である。
１……流動層焼却炉、２……空気室、３……多
孔板、４……流動媒体、５……流動層、６……ホ
ツパ、７……フイーダ、８……シユート、８ａ…
…ノズル、９……助燃バーナ、１０……空塔部バ
ーナ、１１，１２……温度発信器、１３……制御
箱、１４……使用孔数を制御する装置、１８……
ダンパ、１５，１６，１７，２０……制御弁、１
９……不活性ガスの管路、２１……ミキサ。
FIG. 1 is a drawing showing the arrangement and system of the apparatus according to the present invention. 1... Fluidized bed incinerator, 2... Air chamber, 3... Perforated plate, 4... Fluidized medium, 5... Fluidized bed, 6... Hopper, 7... Feeder, 8... Chute, 8a...
... Nozzle, 9 ... Assist burner, 10 ... Sky tower burner, 11, 12 ... Temperature transmitter, 13 ... Control box, 14 ... Device for controlling the number of holes used, 18 ...
Damper, 15, 16, 17, 20...control valve, 1
9...Inert gas pipe, 21...Mixer.
Claims (1)
動層上方に形成した空塔部とよりなる焼却装置で
焼却処理する方法において、流動層内温度を検知
する温度発信器の信号と空塔部の温度を検知する
温度発信器の信号とを制御箱に送り、その指令に
より被焼却物たるアンモニア成分含有物質の流動
層への供給量と、燃焼用空気の供給量と、流動層
内に位置する助燃バーナの燃料流量と、流動層直
上の空塔部の下方に位置する空塔バーナの燃料流
量を制御することにより、流動層内温度よりも流
動層直上面近傍の空塔部内温度を高く690〜710℃
に保持する制御をすることを特徴とするアンモニ
ア成分含有物質焼却方法。1. In a method of incinerating a substance containing an ammonia component using an incinerator consisting of a fluidized bed and an empty tower formed above the fluidized bed, the signal of a temperature transmitter that detects the temperature inside the fluidized bed and the temperature of the empty tower The temperature transmitter signal that detects the By controlling the fuel flow rate of the burner and the fuel flow rate of the empty tower burner located below the empty column directly above the fluidized bed, the temperature inside the empty tower near the surface directly above the fluidized bed is raised to 690 to 710 degrees higher than the temperature inside the fluidized bed. ℃
A method for incinerating a substance containing an ammonia component, characterized by controlling the retention of the ammonia component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4524778A JPS54137870A (en) | 1978-04-19 | 1978-04-19 | Controller for ep ash incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4524778A JPS54137870A (en) | 1978-04-19 | 1978-04-19 | Controller for ep ash incinerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54137870A JPS54137870A (en) | 1979-10-25 |
| JPS6255054B2 true JPS6255054B2 (en) | 1987-11-18 |
Family
ID=12713923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4524778A Granted JPS54137870A (en) | 1978-04-19 | 1978-04-19 | Controller for ep ash incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54137870A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4392814A (en) * | 1979-06-08 | 1983-07-12 | Can-Eng Holdings Limited | Fluidized bed |
| JPS60251309A (en) * | 1984-05-25 | 1985-12-12 | Kunio Watabe | Fluidized-bed incinerator and method of operating same |
-
1978
- 1978-04-19 JP JP4524778A patent/JPS54137870A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54137870A (en) | 1979-10-25 |
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