JPS60216828A - Denitration process using no catalyst - Google Patents
Denitration process using no catalystInfo
- Publication number
- JPS60216828A JPS60216828A JP59070085A JP7008584A JPS60216828A JP S60216828 A JPS60216828 A JP S60216828A JP 59070085 A JP59070085 A JP 59070085A JP 7008584 A JP7008584 A JP 7008584A JP S60216828 A JPS60216828 A JP S60216828A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- nozzle
- reaction space
- temperature
- opening
- 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
Abstract
Description
【発明の詳細な説明】
この発明は、排ガス中にＮＨ，を注入してＮＯＸを除去
する無触媒脱硝法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a non-catalytic denitrification method in which NOx is removed by injecting NH into exhaust gas.
無触媒脱硝法は反応空間にＮＨ，を噴霧添加し、排ガス
中のＮＯ，を水と窒素に転化させ無害化する方法である
が、この方法においては反応空間の温度が重要であル、
この温度を適当な温度としないと、脱硝率が低下したシ
或はＮＨ，のリークが発生する等の問題を生ずる。The non-catalytic denitrification method is a method in which NH is sprayed into the reaction space to convert NO in the exhaust gas into water and nitrogen, making it harmless. In this method, the temperature of the reaction space is important.
If this temperature is not set to an appropriate temperature, problems such as a decrease in the denitrification rate or leakage of NH will occur.
第１図は脱硝率と反応空間温度との関係を示すグラフで
あシ、ここかられかるように低温側でも高温側でも脱硝
率が低下する。FIG. 1 is a graph showing the relationship between the denitration rate and the reaction space temperature, and as can be seen from the graph, the denitration rate decreases both on the low temperature side and on the high temperature side.
また第２図に示す反応空間温度とり−クＮＨ。Further, the reaction space temperature shown in FIG. 2 is NH.
濃度との関係かられかるように、反応空間温度が低すぎ
てもリークＮＨ１が多量に発生する。As can be seen from the relationship with the concentration, a large amount of leaked NH1 occurs even if the reaction space temperature is too low.
このような反応空間温度の問題は、特にごみ焼却炉のよ
うに排ガス温度に変化のある炉や負荷変動の大きな炉で
は重大であシ、一定の脱硝率を得るためにはＮＨ，噴射
を増減させる必要があシ、制御が難しくなる上ＮＨ３の
消費量が多くなる問題があった０また温度が低すぎてリ
ークＮ鳥が多量に発生した場合にはＮｕ、１！Ｘ霧点下
流側で装置の腐食やＮＨ，ＣＬ等による空気予熱器の閉
塞や白煙の発生等の問題を生じていた。このような欠点
を解決するために、 ＮＨ，供給個所における排ガス温
度を、７１ＳＯ〜９５０°０に維持する技術が特開昭５
４−９６２７０号にて提案されている。This problem of reaction space temperature is especially serious in furnaces where the exhaust gas temperature changes, such as garbage incinerators, or furnaces with large load fluctuations, and in order to obtain a constant denitrification rate, it is necessary to increase or decrease NH injection. However, there was a problem that it became difficult to control and the amount of NH3 consumed increased.Also, if the temperature is too low and a large amount of leakage occurs, Nu,1! Problems such as corrosion of the equipment, blockage of the air preheater due to NH, CL, etc., and generation of white smoke occurred downstream of the X fog point. In order to solve these drawbacks, a technology to maintain the exhaust gas temperature at the NH supply point between 71SO and 950°0 was developed in JP-A No. 5.
It is proposed in No. 4-96270.
しかし、この方法の場合、排ガス温匹を所定温度に維持
するために燃焼機器を必要とし、発熱量制御のためには
燃料を特徴とする特許がある。However, this method requires a combustion device to maintain the temperature of the exhaust gas at a predetermined temperature, and there are patents that feature a fuel for controlling the amount of heat generated.
本発明は上記した従来技術の欠点を改良するためになさ
れたもので、反応空間に複数のＮＨ，噴射ノズルを設け
、該各噴射ノズルに対応する部分の温度を検出し、予め
決められた温度に合致した部分の噴射ノズルからＮＨ，
を噴射することを基本的な特徴とするものであるＯ
第３図に基づいて本発明の詳細な説明する０図中、（１
）は反応空間であシ、排ガス流れ方向に沿って複数のＮ
Ｈ，噴射ノズル（２ａ）〜（２ｎ）が配設されている。The present invention has been made in order to improve the above-mentioned drawbacks of the prior art, and includes providing a plurality of NH injection nozzles in the reaction space, detecting the temperature of a portion corresponding to each injection nozzle, and detecting the temperature at a predetermined temperature. NH from the injection nozzle of the part that matches,
The basic feature is that the present invention is injected.
) is the reaction space, and multiple N
H, injection nozzles (2a) to (2n) are provided.
図の例は焼却炉の排ガス脱硝の場合を示しておシ、この
反応空間（１）は、第４図に示す焼却炉α１から廃熱ボ
イツαルに至る空間である。The example shown in the figure shows the case of exhaust gas denitrification in an incinerator, and this reaction space (1) is a space extending from the incinerator α1 to the waste heat boiler shown in FIG.
なお、第４図中（２）は電気集塵機、ａｌは吸引ブロワ
、ａ４はＨＣＡ除去装置、（ト）は煙突である。In Fig. 4, (2) is an electrostatic precipitator, al is a suction blower, a4 is an HCA removal device, and (g) is a chimney.
各ＮＨ，噴射ノズル（２）に鉱夫々制御弁（３）が設け
られておシ、制御装置（４）によシ開閉及び開度制御を
うけるようになっている。Each NH injection nozzle (2) is provided with a miner control valve (3), and is controlled to open/close and open by a control device (4).
該噴射ノズル（２ａ）〜（２ｎ）に対応する反応空間（
１）の各部分には、夫々温度検出器（５ａ）〜（５ｎ）
が備えられてあシ、各部分の温度を検出している・この
検出値は制御装置（４）に入力され、ここで予め設定さ
れた温度と検出値が一致した場合、当該部分のノズル（
２）の制御弁（３）を開としてＮＨ，を噴射する。また
温度が一致しなくなった部分のノズルを閉とし、噴射を
停止する。Reaction spaces (corresponding to the injection nozzles (2a) to (2n))
Each part of 1) is equipped with temperature detectors (5a) to (5n), respectively.
is equipped to detect the temperature of each part. This detected value is input to the control device (4), and if the detected value matches the preset temperature here, the nozzle (
2) Open the control valve (3) and inject NH. Also, the nozzles in the areas where the temperatures no longer match are closed and the injection is stopped.
なお、制御装置（４）には反応空間（１）出側で検出し
た脱硝後のＮＯｘ濃度と排ガス流量の信号を入力し、こ
れに基づいて制御弁（３）の開度制御を行い、 Ｎ）ｉ
、の添加量を調整する。Note that signals of the NOx concentration after denitrification and the exhaust gas flow rate detected at the outlet side of the reaction space (1) are input to the control device (4), and based on these, the opening degree of the control valve (3) is controlled. )i
Adjust the amount of .
以上説明したように本発明法によれは、反、応空間にお
ける最適温度部分にＮＨ，を注入できるから、極めて高
い脱硝効率を得ることができ、そのためＮＨ，注入量を
少なくできランニングプストを低下できる・また、ＮＨ
，のリークも少なくできる上、制御が簡単で且つ排ガス
を加熱する必要がない等の大きな効果を得ることができ
る。As explained above, in the method of the present invention, NH can be injected into the optimal temperature part of the reaction space, so extremely high denitrification efficiency can be obtained, and therefore the amount of NH injection can be reduced and the running pump can be reduced. Can be lowered/Also, NH
It is possible to reduce the leakage of , and also to obtain great effects such as easy control and no need to heat the exhaust gas.
第１図は脱硝率と反応空間温度との関係を示すグラフ、
第２図はり−クＮＨ，濃度と反応空間温度、第３図と部
４図は本発明法の説明図である＠
図中、（１）・・・反応空間、（２）・・・ＮＨ，噴射
ノズル％（３）”・・制御弁、（４）・・・制御装置、
（５）・・・温度検出器・
特許出願人 日本鋼管株式会社
発 明 者 山 岸 三 樹
同 横 山 隆
同 南 孝 勇
代理人弁理士 吉 原 省 三
四 同 高 橋 清
同 弁賎士 吉 原 弘 子
第１図
第２ｍ
Ｔｌ；点１台計１５磨Figure 1 is a graph showing the relationship between the denitrification rate and the reaction space temperature.
Figure 2 shows NH, concentration and reaction space temperature; Figures 3 and 4 are explanatory diagrams of the method of the present invention. In the figure, (1)...reaction space, (2)...NH , injection nozzle % (3)"... control valve, (4)... control device,
(5) Temperature detector - Patent applicant: Nippon Kokan Co., Ltd. Inventor: Miki Yamagishi, Ryudo Yokoyama, Takashi Minami, Patent attorney: Sho Yoshihara, Miyoshi Do: Seido Takahashi, Benpushi Yoshi Hiroko Hara Figure 1 2m Tl; 1 car total 15 grinds
Claims (1)
ズルに対応する部分の温度を検出し、予め決められた温
度に合致した部分の噴射ノズルからＮＨ，を噴射するこ
とを特徴とする無触媒脱硝法〇A plurality of Nu injection nozzles are provided in the reaction space, the temperature of a portion corresponding to each injection nozzle is detected, and NH is injected from the injection nozzle of a portion that matches a predetermined temperature. Catalytic denitrification method〇
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59070085A JPS60216828A (en) | 1984-04-10 | 1984-04-10 | Denitration process using no catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59070085A JPS60216828A (en) | 1984-04-10 | 1984-04-10 | Denitration process using no catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60216828A true JPS60216828A (en) | 1985-10-30 |
Family
ID=13421343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59070085A Pending JPS60216828A (en) | 1984-04-10 | 1984-04-10 | Denitration process using no catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60216828A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010002175A (en) * | 2008-06-23 | 2010-01-07 | Von Roll Umwelttechnik Ag | Method for feeding material into boiler of refuse incineration facility |
| US8763540B2 (en) | 2008-06-23 | 2014-07-01 | Hitachi Zosen Inova Ag | Method for injecting a substance into a boiler of a waste incineration plant |
-
1984
- 1984-04-10 JP JP59070085A patent/JPS60216828A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010002175A (en) * | 2008-06-23 | 2010-01-07 | Von Roll Umwelttechnik Ag | Method for feeding material into boiler of refuse incineration facility |
| US8763540B2 (en) | 2008-06-23 | 2014-07-01 | Hitachi Zosen Inova Ag | Method for injecting a substance into a boiler of a waste incineration plant |
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