JPS61174925A - Waste gas treatment - Google Patents
Waste gas treatmentInfo
- Publication number
- JPS61174925A JPS61174925A JP60013999A JP1399985A JPS61174925A JP S61174925 A JPS61174925 A JP S61174925A JP 60013999 A JP60013999 A JP 60013999A JP 1399985 A JP1399985 A JP 1399985A JP S61174925 A JPS61174925 A JP S61174925A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- slaked lime
- gas
- raw gas
- exhaust gas
- 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
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は排ガス中の塩化水素ガスの乾式除去方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for dry removal of hydrogen chloride gas in exhaust gas.
（従来の技術）
都市ごみ・焼却炉排ガス中の塩化水素ガスを乾式にて除
去する方法として、焼却炉後方の燃焼排ガス中へ消石灰
（ｃａ （ＯＨ） ） 粉末を噴射する方法がある。(Prior Art) As a dry method for removing hydrogen chloride gas from municipal waste and incinerator exhaust gas, there is a method of injecting slaked lime (ca (OH)) powder into the combustion exhaust gas at the rear of the incinerator.
この方法では、排ガスダクト中に噴射（〜だ消石灰粉末
により、排ガス中の塩化水素ガスを中和・吸収して除去
する。In this method, slaked lime powder is injected into the exhaust gas duct to neutralize, absorb and remove hydrogen chloride gas in the exhaust gas.
従って、除去効率を向上するためには、噴射する粉末の
粒子径を小さくして、単位重量当りの粒子表面積を大き
くすることの他に、噴射時の粉末の分散性を高めること
、排ガスとの混合をよくすることがあげられる。第３図
は従来の排ガス処理方法の概略説明図で、第３図におい
て６１は塩化水素を含む原ガスを示し、従来、排ガスダ
クト内に消石灰粉末を噴射するには、第３図て示すよう
に、ダクト内の排ガス流れに対して消石灰粉末を空気輸
送によって噴射する方法がとられている。この方法では
、排ガスの流れに対して単に消石灰粉末を噴射するのみ
なので、粉末の分散性及び排ガスとの混合の点では必ず
しも充分とはいえず塩化水素の除去効果が上がらないと
いう不具合点があった。Therefore, in order to improve the removal efficiency, in addition to reducing the particle size of the injected powder and increasing the particle surface area per unit weight, it is necessary to improve the dispersibility of the powder during injection, and to improve the dispersibility of the powder when injected. One example is to improve mixing. Fig. 3 is a schematic explanatory diagram of a conventional exhaust gas treatment method. In Fig. 3, reference numeral 61 indicates raw gas containing hydrogen chloride. Another method is to inject slaked lime powder into the exhaust gas flow in the duct by pneumatic transport. In this method, the slaked lime powder is simply injected into the flow of exhaust gas, so the dispersibility of the powder and its mixing with the exhaust gas are not necessarily sufficient, and the problem is that the removal effect of hydrogen chloride is not improved. Ta.
（発明が解決しようとする問題点）
本発明は塩化水素ガスの乾式除去方法が、反応、／ｌ：
放物が乾燥した固体であるので後処理としての廃水処理
を必要とせず、噴射した粉末は反応生成物（塩化カルシ
ウム）と共に、捕集ばいじんに混合されて処分されるた
め、それを処理するだめの付帯設備を必要としないとい
う大きな長所をもっていることに着目し、この長所を生
かしながら、かつ従来法の欠点１４１Ｊち、粉末の分散
性及び排ガスとの混合性を改善し除去効果を高め、適用
範囲を広げ、利用価値を高めた排ガス処理方法を提供す
ることを目的としたものである。(Problems to be Solved by the Invention) The present invention provides a method for dry removal of hydrogen chloride gas that involves a reaction, /l:
Since the parabolite is a dry solid, there is no need for wastewater treatment as post-treatment, and the injected powder is mixed with the collected dust and the reaction product (calcium chloride) and disposed of, so there is no need to treat it. We focused on the fact that it has the great advantage of not requiring any incidental equipment, and while taking advantage of this advantage, we also improved the dispersibility of the powder and its mixability with exhaust gas, increasing the removal effect and applying it. The purpose is to provide an exhaust gas treatment method that has expanded its scope and increased its utility value.
（問題点を解決するための手段）
本発明は排ガスダクト内へ消石灰（Ｃａ （ＯＨ） ２
）粉末を噴射して塩化水素を中和除去する際、噴射ノ
ズルを排ガスダクトの同一断面上に複数個設置して噴射
時の粉末の分散性を高め、排ガスとの混合を促進するこ
とによって消石灰粉末と塩化水素ガスとの中和反応を進
行しやす＜ Ｌ、塩化水素の除去効果を向上させる排ガ
ス処理方法を提案するものである。(Means for Solving the Problems) The present invention introduces slaked lime (Ca(OH)2) into the exhaust gas duct.
) When injecting powder to neutralize and remove hydrogen chloride, multiple injection nozzles are installed on the same cross section of the exhaust gas duct to improve the dispersibility of the powder during injection and promote mixing with the exhaust gas, thereby reducing slaked lime. This paper proposes an exhaust gas treatment method that facilitates the neutralization reaction between the powder and hydrogen chloride gas and improves the hydrogen chloride removal effect.
以下、本発明の排ガス処理方法の実施態様例を図面によ
り詳細に説明する。Hereinafter, embodiments of the exhaust gas treatment method of the present invention will be described in detail with reference to the drawings.
第１図は、本発明の実施態様の例示図、第２図は第１図
のＡ−Ａ線断面図である。FIG. 1 is an illustrative diagram of an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line A--A in FIG.
第１図において塩化水素を含む原ガスＧ１の流れる排ガ
スダクトの同一断面上に粉末噴射ノズル３ｆｔ２個以上
複数個設け、消石灰粉末供給機２から供給される消石灰
粉末を粉末噴射ノズル３から噴射する。原ガスＧｌ中に
噴射された消石灰粉末は排ガスダクト内に分散性よく広
がり、原ガスＧ１と混合されながら下流へ流れていく。In FIG. 1, two or more powder injection nozzles of 3 feet or more are provided on the same cross section of the exhaust gas duct through which the raw gas G1 containing hydrogen chloride flows, and the slaked lime powder supplied from the slaked lime powder feeder 2 is injected from the powder injection nozzle 3. The slaked lime powder injected into the raw gas Gl spreads in the exhaust gas duct with good dispersion and flows downstream while being mixed with the raw gas G1.
原ガスＧｌ中に噴射された消石灰は短時間で原ガスＧ１
中の塩化水素ガスと中和反応して、塩化水素ガスを塩化
カルシウムとして粉末中に固定する。噴射された消石灰
は原ガスＧ１中のばいじんと一緒に、下流に設置される
集じん機（例えば、電気集じん機、バグフィルタ−など
）で捕集し、糸外へ排出する。The slaked lime injected into the raw gas G1 becomes the raw gas G1 in a short time.
A neutralization reaction occurs with the hydrogen chloride gas inside, and the hydrogen chloride gas is fixed in the powder as calcium chloride. The injected slaked lime is collected together with soot and dust in the raw gas G1 by a dust collector (for example, an electrostatic precipitator, a bag filter, etc.) installed downstream, and is discharged to the outside of the yarn.
（作 用）
排ガスダクトの同一断面上に設けられた２個以ト複数個
の粉末噴射ノズルから消石灰粉末を噴射することによっ
て、ガス流路断面に対する消石灰粉末の噴射面積を大き
く広げることができるため、消石灰粉末の原ガスへの分
散と混合が促進され、消石灰粉末と原ガス中の塩化水素
ガスの接触頻度と接触効果が高捷る。(Function) By injecting slaked lime powder from two or more powder injection nozzles provided on the same cross section of the exhaust gas duct, the injection area of slaked lime powder against the cross section of the gas flow path can be greatly expanded. , the dispersion and mixing of the slaked lime powder into the raw gas is promoted, and the contact frequency and contact effect between the slaked lime powder and the hydrogen chloride gas in the raw gas are increased.
（実施例）
同一ガス条件で塩化水素ガスが７００ｐ陣含有される都
市こみ焼却炉排ガス中に、同量の消石灰粉末を、従来法
により噴射ノズル１本で噴射した場合と、本発明の方法
により同一仕様の噴射ノズル３本で噴射した場合につい
て塩化水素ガスの除去率を比較した。試験の結果、本発
明方法で消石灰粉末を噴射することにより、従来法に比
べ塩化水素ガスの除去率が１０〜２５％向上した。(Example) Under the same gas conditions, the same amount of slaked lime powder was injected into the exhaust gas of a municipal waste incinerator containing 700p of hydrogen chloride gas using a single injection nozzle according to the conventional method, and when the same amount was injected by the method of the present invention. The removal rate of hydrogen chloride gas was compared when injecting with three injection nozzles of the same specifications. As a result of the test, by injecting slaked lime powder using the method of the present invention, the removal rate of hydrogen chloride gas was improved by 10 to 25% compared to the conventional method.
（発明の効果）
本発明の方法によれば、消石灰粉末の原ガスへの分散と
混合が改善され、消石灰粉末と塩化水素ガスの中和反応
が促進され、塩化水素ガスの除去効果が向上する。(Effects of the Invention) According to the method of the present invention, the dispersion and mixing of slaked lime powder into raw gas is improved, the neutralization reaction between slaked lime powder and hydrogen chloride gas is promoted, and the removal effect of hydrogen chloride gas is improved. .
第１図は本発明の実施態様例の例示図、第２図は第１図
のＡ−Ａ線断面図、第３図は従来法の概略説明図である
。
１・・・排ガスダクト、２・・・消石灰粉末供給機、３
・・・粉末噴射ノズルFIG. 1 is an illustrative diagram of an embodiment of the present invention, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a schematic explanatory diagram of a conventional method. 1... Exhaust gas duct, 2... Slaked lime powder feeder, 3
...Powder injection nozzle
Claims (1)
除去する方法において、噴射ノズルを排ガスダクトの同
一断面上に複数個設置するように構成したことを特徴と
する排ガス処理方法。An exhaust gas treatment method for neutralizing and removing hydrogen chloride by injecting slaked lime powder into an exhaust gas duct, characterized in that a plurality of injection nozzles are installed on the same cross section of the exhaust gas duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60013999A JPS61174925A (en) | 1985-01-28 | 1985-01-28 | Waste gas treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60013999A JPS61174925A (en) | 1985-01-28 | 1985-01-28 | Waste gas treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61174925A true JPS61174925A (en) | 1986-08-06 |
Family
ID=11848923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60013999A Pending JPS61174925A (en) | 1985-01-28 | 1985-01-28 | Waste gas treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61174925A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0192248U (en) * | 1987-12-09 | 1989-06-16 |
-
1985
- 1985-01-28 JP JP60013999A patent/JPS61174925A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0192248U (en) * | 1987-12-09 | 1989-06-16 |
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