JP3340329B2 - Powder chemical supply nozzle for desulfurization and desalination - Google Patents
Powder chemical supply nozzle for desulfurization and desalinationInfo
- Publication number
- JP3340329B2 JP3340329B2 JP28719596A JP28719596A JP3340329B2 JP 3340329 B2 JP3340329 B2 JP 3340329B2 JP 28719596 A JP28719596 A JP 28719596A JP 28719596 A JP28719596 A JP 28719596A JP 3340329 B2 JP3340329 B2 JP 3340329B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- powder
- desulfurization
- supply nozzle
- alkaline
- 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
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Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ごみ焼却炉や灰溶
融炉の排ガス中の塩化水素ガスや亜硫酸ガスなどの有害
物質にアルカリ性薬剤（粉末）を排ガス中に吹き込んで
反応させ、固形化合物を生成してバグフィルタなどの集
塵装置により回収するための脱硫・脱塩用粉末薬剤供給
ノズルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the reaction of harmful substances, such as hydrogen chloride gas and sulfurous acid gas, in exhaust gas from refuse incinerators and ash melting furnaces by blowing an alkaline chemical (powder) into the exhaust gas to react with solid compounds. The present invention relates to a powder chemical supply nozzle for desulfurization and desalination for generation and collection by a dust collector such as a bag filter.
【０００２】[0002]
【従来の技術】ごみ焼却設備において、焼却排ガス中に
含まれる塩化水素ガスや亜硫酸ガスを回収する方法とし
て、アルカリ粉末、たとえば炭酸カルシウムＣａＣＯ
3 、消石灰Ｃａ（ＯＨ）2 、炭酸ソーダＮａ2 ＣＯ3 、
カセイソーダＮａＯＨなどのアルカリ性薬剤（粉末）を
排ガス中に吹き込んで反応させ、固形化合物を生成して
バグフィルタにより回収するものがある。2. Description of the Related Art In a refuse incineration plant, as a method of recovering hydrogen chloride gas or sulfurous acid gas contained in incineration exhaust gas, alkali powder such as calcium carbonate CaCO 3 is used.
3 , slaked lime Ca (OH) 2 , sodium carbonate Na 2 CO 3 ,
There is an apparatus in which an alkaline agent (powder) such as sodium hydroxide (NaOH) is blown into an exhaust gas to cause a reaction to generate a solid compound, which is collected by a bag filter.
【０００３】上記アルカリ粉末、たとえば消石灰が吹き
込まれると、排ガス中の塩化水素や亜硫酸ガスは下記の
固気反応およびにより、固形化合物が生成される。 ２ＨＣｌ＋Ｃａ（ＯＨ）2 →ＣａＣｌ2 ＋２Ｈ2 Ｏ… ＳＯ2 ＋Ｃａ（ＯＨ）2 →ＣａＳＯ3 ＋Ｈ2 Ｏ… このアルカリ性薬剤と反応助剤は、排ガスダクトのバグ
フィルタの入口上流側で吹き込まれて排ガスと反応され
固形化合物が生成され有害ガスが除去されている。When the above-mentioned alkali powder, for example, slaked lime, is blown, a solid compound is produced by the following solid-gas reaction of hydrogen chloride and sulfur dioxide gas in the exhaust gas. 2HCl + Ca (OH) 2 → CaCl 2 + 2H 2 O SO 2 + Ca (OH) 2 → CaSO 3 + H 2 O The alkaline agent and the reaction aid are blown at the upstream side of the bag filter of the exhaust gas duct to form exhaust gas. The reaction produces solid compounds and removes harmful gases.
【０００４】ところで、このアルカリ性薬剤と排ガスと
は固気反応であるため反応率が低い、この反応効率をあ
げるために、本出願人は、薬剤供給ノズルの近傍に蒸気
を吹き込み、反応高率を上げることを提案している。[0004] By the way, since the alkaline chemical and the exhaust gas are a solid-gas reaction, the reaction rate is low. In order to increase the reaction efficiency, the present applicant blows steam near the chemical supply nozzle to reduce the reaction rate. Propose to raise.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、大形の
ごみ焼却炉となると排ガス量が多くなり、排ガスダクト
が大形化して蒸気吹き込み口も複数必要となると、蒸気
と薬剤の良好な混合状態を得るのが困難になるおそれが
あった。However, when a large-sized refuse incinerator is used, the amount of exhaust gas increases, and when the exhaust gas duct becomes large and a plurality of steam inlets are required, a good mixing state of steam and chemicals is required. There was a risk that it would be difficult to obtain.
【０００６】本発明のうち請求項１記載の発明は、上記
問題点を解決して、大形の排ガスダクトであっても、薬
剤と排ガスとの良好な混合状態を得ることができ脱塩効
率を向上できる脱硫・脱塩用粉末薬剤供給ノズルを提供
することを目的とする。According to the first aspect of the present invention, it is possible to solve the above-mentioned problems and to obtain a good mixing state of the chemical and the exhaust gas even in the case of a large exhaust gas duct. It is an object of the present invention to provide a powder chemical supply nozzle for desulfurization and desalination capable of improving the quality.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明の請求項１記載の脱硫・脱塩用粉末薬剤供給ノ
ズルは、集塵装置の上流側排ガスダクトに配設されて排
ガス中にアルカリ性粉末薬剤を吹き込み、排ガス中の塩
類と反応させて固形化合物を生成する脱硫・脱塩用粉末
薬剤供給ノズルであって、軸心部に配置されて先端部に
噴射口を有し基端部に薬剤気送管が接続された内筒部
と、この記内筒部の外周に配置されて先端部に噴射口を
有し基端部に高圧蒸気を供給する蒸気接続管が接続され
た外筒部とを備え、前記内筒部から噴射されたアルカリ
性粉末薬剤の周囲で、外筒部から噴射された高圧蒸気を
排ガスダクトの減圧作用によりフラッシュさせ、極短時
間に生成された微細な水滴を接触させることにより、排
ガス中の塩類とアルカリ性粉末薬剤とを固液反応させる
ように構成したものである。請求項３記載の脱硫・脱塩
用粉末薬剤供給ノズルは、集塵装置の上流側排ガスダク
トに配設されて排ガス中にアルカリ性粉末薬剤を吹き込
み、排ガス中の塩類と反応させて固形化合物を生成する
脱硫・脱塩用粉末薬剤供給ノズルであって、軸心部に配
置されて先端部に噴射口を有し基端部に薬剤気送管が接
続された内筒部と、この内筒部の外周に配置されて先端
部で中心側ほど凹むテーパ部に複数の噴射孔が形成さ
れ、基端部に高圧蒸気を供給する蒸気接続管が接続され
た外筒部とを備え、外周側から噴射された高圧蒸気によ
り、内筒部から噴射されたアルカリ性粉末薬剤を攪拌す
るとともに、高圧蒸気を排ガスダクトの減圧作用により
フラッシュさせ、極短時間に生成された微細な水滴を接
触させることにより、排ガス中の塩類とアルカリ性粉末
薬剤とを固液反応させるように構成したものである。 請
求項４記載の脱硫・脱塩用粉末薬剤供給ノズルきは、集
塵装置の上流側排ガスダクトに配設されて排ガス中にア
ルカリ性粉末薬剤を吹き込み、排ガス中の塩類と反応さ
せて固形化合物を生成する脱硫・脱塩用粉末薬剤供給ノ
ズルであって、軸心部に配置されて、高圧蒸気が供給さ
れるとともに内径が小さく形成された蒸気接続管が接続
された大きい直径の内筒部と、この内筒部の外周に配置
されて先端部に環状の噴射口が形成された基端部に薬剤
気送管が接続された外筒部とを 備え、前記噴射口から噴
射されたアルカリ性粉末薬剤中に、拡散されて吹き込ま
れた高圧蒸気を排ガスダクトの減圧作用によりフラッシ
ュさせ、極短時間に生成された微細な水滴を接触させる
ことにより、排ガス中の塩類とアルカリ性粉末薬剤とを
固液反応させるように構成したものである。 According to a first aspect of the present invention, there is provided a powdery chemical supply nozzle for desulfurization and desalination, which is disposed in an exhaust gas duct on an upstream side of a dust collecting apparatus. bubbled alkaline powdered medicament, is reacted with salts in the exhaust gas to a desulfurization and powdered medicine supply nozzle desalination to produce a solid compound, the tip portion is disposed in the axial section
An inner cylinder having an injection port and a drug pneumatic tube connected to a base end thereof, and a high pressure steam supplied to the base having an injection port at a distal end disposed at an outer periphery of the inner cylinder and having a discharge port at a distal end thereof. Steam connection pipe is connected
An outer cylinder portion, and the alkali injected from the inner cylinder portion.
High-pressure steam injected from the outer cylinder around the powdered chemical
Flush due to the decompression effect of the exhaust gas duct, when extremely short
By contacting fine water droplets generated between them,
Solid-liquid reaction between salts in gas and alkaline powder drug
It is configured as follows. The desulfurization and desalination according to claim 3.
Powder chemical supply nozzle for exhaust gas exhaust gas upstream of the dust collector
And alkaline chemicals are blown into the exhaust gas
Reacts with salts in the exhaust gas to produce solid compounds
This is a powder chemical supply nozzle for desulfurization and desalination, which is
It has an injection port at the distal end, and the drug pneumatic tube is in contact with the proximal end.
The inner cylinder part which is continued and the tip
Multiple injection holes are formed in the tapered part that is concave toward the center in the part
A steam connection pipe that supplies high-pressure steam is connected to the base end.
And a high-pressure steam injected from the outer peripheral side.
And stir the alkaline powder medicine injected from the inner cylinder.
And the high-pressure steam is reduced by the depressurizing action of the exhaust gas duct.
Flash and contact fine water droplets generated in a very short time
The salt and alkaline powder in the exhaust gas
It is configured to cause a solid-liquid reaction with a drug. Contract
The powder drug supply nozzle for desulfurization and desalination according to claim 4,
Installed in the exhaust gas duct on the upstream side of the dust
Injects a powdery powdery chemical and reacts with salts in exhaust gas.
Powder chemicals for desulfurization and desalination
Nozzle, which is located at the shaft center and is supplied with high-pressure steam.
Steam connection pipe with a small inside diameter
Large diameter inner cylinder and the outer circumference of this inner cylinder
And a ring-shaped injection port is formed at the distal end.
Pneumatic tube has a connected outer cylindrical portion, injection from the injection port
Spread into the sprayed alkaline powder drug
High-pressure steam is flushed by the decompression effect of the exhaust gas duct.
And contact fine water droplets generated in a very short time.
By this, salts in the exhaust gas and alkaline powder chemicals
It is configured to cause a solid-liquid reaction.
【０００８】上記構成によれば、粉末アルカリ性薬剤の
吹き込み部周囲近傍に高圧の蒸気を吹き込むか、あるい
は排ガス中に吹き込まれた高圧の蒸気の周囲近傍に粉末
アルカリ性薬剤を供給することにより、蒸気の急激な減
圧作用でフラッシュさせて極短時間（瞬時）に微細な水
滴を生成させ、酸性ガスで水と反応しやすい塩化水素等
と水滴と反応させて水溶液とし、この水溶液がアルカリ
性薬剤と接触させて固気反応よりも効率のよい固液反応
させ、効率良く固形化合物を生成させる。また蒸気とア
ルカリ性薬剤の気送空気とが接触する周囲においても同
様に微細水滴を発生させ、微細水滴と酸性ガスとアルカ
リ性薬剤が瞬時共存する状態が形成され、固液反応によ
りアルカリ性薬剤の反応効率を向上させる。さらに、水
蒸気によりアルカリ性薬剤を効果的に分散させることが
でき、酸性ガスとアルカリ粉末との接触面積を増大させ
て固気反応を促進させることができる。このように排ガ
ス中でアルカリ性薬剤近傍に高圧の蒸気を吹き込むこと
ができるので、大口径で大流量の排ガスダクト内であっ
ても、効果的にアルカリ性薬剤を分散させて反応効率を
向上させることができる。[0008] According to the above configuration, the high-pressure steam is blown around the vicinity of the blowing portion of the powdered alkaline chemical, or the powdered alkaline chemical is supplied to the vicinity of the high-pressure steam blown into the exhaust gas, whereby the steam is discharged. Flush by rapid depressurizing action to generate minute water droplets in a very short time (instantaneous), and react with water droplets with hydrogen chloride etc. which is easy to react with water with acidic gas to form an aqueous solution, and this aqueous solution is brought into contact with an alkaline drug A solid-liquid reaction is performed more efficiently than a solid-gas reaction, and a solid compound is generated efficiently. Similarly, fine water droplets are generated around the area where the vapor comes into contact with the pneumatic air of the alkaline chemical, and a state in which the fine water droplet, the acidic gas and the alkaline chemical coexist instantaneously is formed, and the reaction efficiency of the alkaline chemical by solid-liquid reaction. Improve. Further, the alkaline agent can be effectively dispersed by the steam, and the solid-gas reaction can be promoted by increasing the contact area between the acidic gas and the alkaline powder. Since high-pressure steam can be blown into the vicinity of the alkaline agent in the exhaust gas in this way, even in a large-diameter and large-flow exhaust gas duct, it is possible to effectively disperse the alkaline agent and improve the reaction efficiency. it can.
【０００９】[0009]
【発明の実施の形態】ここで、本発明に係るごみ焼却設
備における薬剤供給ノズルの第１の実施の形態を図１，
図２に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, a first embodiment of a chemical supply nozzle in a refuse incineration plant according to the present invention is shown in FIGS.
A description will be given based on FIG.
【００１０】図２に示すように、ごみ焼却炉１から排熱
ボイラ１ａを介して排出する排ガス経路２には、上流側
から順に、排ガスを冷却する調温塔３と、排ガス中にア
ルカリ薬剤を吹き込む本発明に係る薬剤供給ノズル４
と、排ガスから有害重金属や固形化合物、塵埃を除去す
る集塵装置であるバグフィルタ５と、誘引ファン６およ
び煙突７を備えている。As shown in FIG. 2, an exhaust gas path 2 discharged from a waste incinerator 1 via an exhaust heat boiler 1a includes, in order from an upstream side, a temperature control tower 3 for cooling the exhaust gas, and an alkaline chemical in the exhaust gas. Supply nozzle 4 according to the present invention for blowing air
A bag filter 5 which is a dust collecting device for removing harmful heavy metals, solid compounds, and dust from exhaust gas, and an induction fan 6 and a chimney 7.
【００１１】前記薬剤供給ノズル４は、従来では気送空
気とともに消石灰などのアルカリ性薬剤（粉末）を排ガ
ス中に吹き込むだけの構成であったが、この実施の形態
では、アルカリ性薬剤と同時に高圧の蒸気を排ガス中に
吹き込むことにより、反応高率を上げるように構成して
いる。すなわち、図１に示すように、排ガスダクト１１
に形成された開口部１１ａに取り付けられた薬剤供給ノ
ズル４は、軸心部に配置された内筒部１２と、この内筒
部の外周に一定の空間をあけて外嵌された外筒部１３と
を備え、外筒部１２付のブラケット１４が排ガスダクト
１１に固定されている。外筒部１３は、先端側ほど外周
側に広がる環状の噴射口（噴射孔）１３ａが内筒部１２
との間に形成され、基端部に蒸気供給管１５が接続され
ている。また内筒部１２は、その胴部１２ｂが外筒部１
３の端板１３ｂを貫通して配置され、先端部に先端側ほ
ど内径が広がる噴射口（噴射孔）１２ａが形成されてい
る。また内筒部１２の基端部には、偏心位置に薬剤気送
管１６が接続された大径の旋回筒部１２ｃが設けられ
て、薬剤気送管１６から気送空気により吹き込まれるア
ルカリ性薬剤を旋回させつつ胴部１２ｂから噴射口１２
ａに送り出すように構成されている。Conventionally, the chemical supply nozzle 4 has a structure in which an alkaline chemical (powder) such as slaked lime is blown into exhaust gas together with pneumatic air, but in this embodiment, high-pressure steam is simultaneously supplied with the alkaline chemical. Is blown into the exhaust gas to increase the reaction rate. That is, as shown in FIG.
The medicine supply nozzle 4 attached to the opening 11a formed in the inner cylinder part includes an inner cylinder part 12 arranged at the axial center part, and an outer cylinder part which is fitted around the outer periphery of the inner cylinder part with a certain space. The bracket 14 having the outer cylinder portion 12 is fixed to the exhaust gas duct 11. The outer cylindrical portion 13 has an annular injection port (injection hole) 13 a that spreads toward the outer periphery toward the distal end side.
And a steam supply pipe 15 is connected to the base end. The inner cylinder 12 has a body 12b that is
3, an injection port (injection hole) 12a is formed at the distal end portion, the inner diameter of which increases toward the distal end side. At the base end of the inner cylindrical portion 12, a large-diameter swirl tube portion 12c having a drug pneumatic tube 16 connected to an eccentric position is provided, and an alkaline drug blown by pneumatic air from the drug pneumatic tube 16 is provided. Is turned from the body 12b to the injection port 12
a.
【００１２】上記構成において、ごみ焼却炉１から排出
される排ガスは、排熱ボイラ１ａにより熱回収された
後、排ガス経路２に排出され、調温塔３でバグフィルタ
５に適した温度に冷却された後、薬剤供給ノズル４から
アルカリ性薬剤と蒸気が吹き込まれる。このとき、内筒
部１２の噴射口１２ａから気送空気により吹き込まれた
アルカリ性薬剤の周囲に高圧の蒸気が排ガス中に噴射さ
れる。In the above configuration, the exhaust gas discharged from the waste incinerator 1 is recovered by the waste heat boiler 1a and then discharged to the exhaust gas path 2 where it is cooled by the temperature control tower 3 to a temperature suitable for the bag filter 5. After that, an alkaline drug and steam are blown from the drug supply nozzle 4. At this time, high-pressure steam is injected into the exhaust gas around the alkaline agent blown by the pneumatic air from the injection port 12a of the inner cylinder portion 12.
【００１３】すると、蒸気の急激な減圧作用でフラッシ
ュして極短時間（瞬時）に微細な水滴を生成され、酸性
ガスで水と反応しやすい塩化水素等が反応してアルカリ
性薬剤と接触し、固気反応よりも効率のよい固液反応し
て効率良く固形化合物が生成される。また蒸気とアルカ
リ性薬剤の気送空気とが接触する周囲においても同様に
微細水滴が発生して微細水滴と酸性ガスとアルカリ性薬
剤が瞬時共存する状態が形成され、固液反応によりアル
カリ性薬剤の反応効率が向上される。さらに、アルカリ
性薬剤が水蒸気により効果的に分散されることになり、
酸性ガスとアルカリ粉末との接触面積が増大されて固気
反応が促進される。[0013] Then, the flash is flashed by the rapid depressurizing action of the steam, and minute water droplets are generated in an extremely short time (instantaneously). Hydrogen chloride or the like which easily reacts with water by the acidic gas reacts with the alkaline agent, The solid-liquid reaction is performed more efficiently than the solid-gas reaction, and a solid compound is generated efficiently. Similarly, fine water droplets are generated around the area where the vapor comes into contact with the pneumatic air of the alkaline chemical, and a state in which the fine water droplet, acid gas and alkaline chemical coexist instantaneously is formed, and the reaction efficiency of the alkaline chemical by solid-liquid reaction is formed. Is improved. In addition, the alkaline drug will be effectively dispersed by the steam,
The solid-gas reaction is promoted by increasing the contact area between the acidic gas and the alkali powder.
【００１４】また、排ガス中に吹き込まれた粉末アルカ
リ性薬剤の周囲に高圧の蒸気を吹き込むので、径が大き
く大流量の排ガスダクト１１であっても、アルカリ性薬
剤を効果的に拡散させて均質な反応が可能となる。Further, since high-pressure steam is blown around the powdered alkaline chemicals blown into the exhaust gas, even in the exhaust gas duct 11 having a large diameter and a large flow rate, the alkaline chemicals can be effectively diffused to achieve a homogeneous reaction. Becomes possible.
【００１５】ついでバグフィルタ５に導入された排ガス
は、ろ布により重金属類と塵埃とともに固形化合物が補
集される。これにより、アルカリ性薬剤末の反応効率が
向上されてその使用量を減少させることができ、その結
果バグフィルタ５で捕集される飛灰量も減少され、重金
属の溶出を防止するための中和剤の使用量や埋立地の占
有量を減少させることができる。The exhaust gas introduced into the bag filter 5 is collected by a filter cloth to collect solid compounds together with heavy metals and dust. As a result, the reaction efficiency of the alkaline chemical powder is improved, and the amount of the alkaline chemical powder used can be reduced. As a result, the amount of fly ash collected by the bag filter 5 is also reduced, and neutralization for preventing the elution of heavy metals. Use of chemicals and occupation of landfills can be reduced.
【００１６】上記実施の形態では、集塵装置をバグフィ
ルタ５としたが、固形化合物の充分な補集能力のある他
の形式の集塵装置、たとえば電気集塵機やサイクロン式
集塵機を採用してもよい。In the above embodiment, the bag filter 5 is used as the dust collector. However, another type of dust collector having a sufficient solid compound collecting ability, such as an electric dust collector or a cyclone dust collector, may be used. Good.
【００１７】図３は薬剤供給ノズルの第２の実施の形態
を示す。第１の実施の形態では、アルカリ性薬剤と高圧
蒸気をそれぞれ拡散する方向に噴射したが、この薬剤供
給ノズル２１は、噴射されたアルカリ性薬剤の外周から
内側に高圧蒸気を噴射して攪拌効果を上げるように構成
されている。FIG. 3 shows a second embodiment of the drug supply nozzle. In the first embodiment, the alkaline medicine and the high-pressure vapor are jetted in the directions of diffusion, respectively. However, this medicine supply nozzle 21 injects the high-pressure vapor from the outer periphery of the injected alkaline medicine to the inside to increase the stirring effect. It is configured as follows.
【００１８】すなわち、内筒部２２に一定の空間をあけ
て外筒部２３が同一軸心上に外嵌され、外筒部２３の先
端部に取り付けられた先端板２３ｃの内周部に、中心ほ
ど凹むテーパ部２３ｂが形成され、このテーパ部２３ｂ
に複数の噴射孔２３ａが形成されている。また内筒部２
２に薬剤気送管１６が接続され、また外筒部２３の基端
部に蒸気供給管１５が接続されている。That is, the outer cylinder 23 is fitted around the same axis with a certain space in the inner cylinder 22, and the inner periphery of a tip plate 23c attached to the tip of the outer cylinder 23 is A tapered portion 23b recessed toward the center is formed.
Are formed with a plurality of injection holes 23a. Also the inner cylinder 2
2 is connected to a drug pneumatic tube 16, and a vapor supply tube 15 is connected to a base end of the outer cylinder 23.
【００１９】したがって、内筒部２２の噴射口（噴射
孔）２２ａから気送空気により吹き込まれるアルカリ性
薬剤に、外筒部２３のテーパ部２３ｂに形成された噴射
孔２４ａにより外周側から高圧蒸気が吹き込まれて攪拌
効果を促進させ、反応効率を向上させることができる。Accordingly, high-pressure steam is injected from the outer peripheral side by the injection hole 24a formed in the tapered portion 23b of the outer cylinder portion 23 into the alkaline chemical blown by the pneumatic air from the injection port (injection hole) 22a of the inner cylinder portion 22. It can be blown to promote the stirring effect and improve the reaction efficiency.
【００２０】図４は薬剤供給ノズルの第３の実施の形態
を示す。第１，第２の実施の形態では、アルカリ性薬剤
の外周部から高圧蒸気を供給したが、高圧蒸気の外周部
からアルカリ性薬剤を供給するように構成したものであ
る。FIG. 4 shows a third embodiment of the drug supply nozzle. In the first and second embodiments, the high-pressure steam is supplied from the outer peripheral portion of the alkaline chemical. However, the configuration is such that the alkaline chemical is supplied from the outer peripheral portion of the high-pressure vapor.
【００２１】すなわち、この薬剤供給ノズル３１は、基
端部に薬剤気送管１６が接続された円筒状の外筒部３３
内に、一定の空間をあけて蒸気供給管１５が接続された
内筒部３２が同一軸心状に内嵌されている。またこの内
筒部３２は比較的大きい直径に形成され、内径の小さい
蒸気供給管１５にテーパ部３５を介して接続されてい
る。That is, the medicine supply nozzle 31 has a cylindrical outer cylinder 33 having a medicine pneumatic tube 16 connected to the base end thereof.
Inside, an inner cylindrical portion 32 to which the steam supply pipe 15 is connected with a certain space is fitted in the same axial center. The inner cylindrical portion 32 has a relatively large diameter, and is connected to the steam supply pipe 15 having a small inner diameter via a tapered portion 35.
【００２２】したがって、蒸気供給管１５からテーパ部
３５を介して内筒部３５に送られた高圧蒸気は、噴射口
３２ａから排ガスダクト１１内に拡散されて吹き込まれ
る。そして、外筒部３３先端の環状噴射口（噴射孔）３
３ａから気送空気によりアルカリ性薬剤が吹き込まれ
る。これにより、上記実施の形態と同様にアルカリ性薬
剤の反応高率を向上させることができる。Therefore, the high-pressure steam sent from the steam supply pipe 15 to the inner cylindrical portion 35 via the tapered portion 35 is diffused from the injection port 32a into the exhaust gas duct 11 and blown. Then, the annular injection port (injection hole) 3 at the tip of the outer cylinder portion 33
An alkaline agent is blown from the air 3a by the pneumatic air. As a result, it is possible to improve the high reaction rate of the alkaline drug as in the above embodiment.
【００２３】つぎに第１の実施の形態で使用したの薬剤
供給ノズル４を使用した場合の実験結果を図５および図
６を参照して説明する。図５に示すように、ここでは、
プラズマ式灰溶融炉のバグフィルタ４２の上流側の排ガ
ス経路４１は、直径Ｄ＝１５０ｍｍで、排ガスの流量は
６００Ｎｍ3／ｈである。また排ガスの条件は、Ｏ2 ：
１０％、ＣＯ2 ：８％、ＣＯ：１０ｐｐｍ以下、ＨＣ
ｌ：６００ｐｐｍ、排ガス温度１７０℃で水分は３０
％、またアルカリ性粉末薬剤のＣａ（ＯＨ）2の 吹込量
はＣｌ当量比３、さらに吹き込まれる蒸気温度は１３０
℃と１５０℃と１７０℃の３種類で、本発明の薬剤供給
ノズル４または上流側蒸気ノズル４３あるいは下流側蒸
気ノズル４４からとした。Next, experimental results when the drug supply nozzle 4 used in the first embodiment is used will be described with reference to FIGS. As shown in FIG. 5, here,
The exhaust gas path 41 on the upstream side of the bag filter 42 of the plasma type ash melting furnace has a diameter D = 150 mm, and the flow rate of the exhaust gas is 600 Nm 3 / h. The condition of the exhaust gas is O 2 :
10%, CO 2: 8% , CO: 10ppm or less, HC
1: 600 ppm, exhaust gas temperature 170 ° C, water content 30
%, And the injection amount of Ca (OH) 2 as an alkaline powder drug was Cl equivalent ratio of 3, and the steam temperature to be injected was 130.
C., 150.degree. C., and 170.degree. C., from the drug supply nozzle 4, the upstream steam nozzle 43, or the downstream steam nozzle 44 of the present invention.
【００２４】その結果、図６に示すように、薬剤供給ノ
ズル４からと同時に蒸気を吹き込む方が脱塩率が高いこ
とが実証された。さらに蒸気温度との関係では、蒸気が
１２０℃と温度が低いのときの方が脱塩率が高いことも
分かった。As a result, as shown in FIG. 6, it was proved that steam was simultaneously blown from the chemical supply nozzle 4 to increase the desalting rate. Further, in relation to the steam temperature, it was found that the desalting rate was higher when the temperature of the steam was as low as 120 ° C.
【００２５】[0025]
【発明の効果】以上に述べたごとく本発明によれば、粉
末アルカリ性薬剤の吹き込み部周囲近傍に高圧の蒸気を
吹き込むか、あるいは排ガス中に吹き込まれた高圧の蒸
気の周囲近傍に粉末アルカリ性薬剤を供給することによ
り、蒸気の急激な減圧作用でフラッシュさせて極短時間
（瞬時）に微細な水滴を生成させ、酸性ガスで水と反応
しやすい塩化水素等と水滴と反応させて水溶液とし、こ
の水溶液がアルカリ性薬剤と接触させて固気反応よりも
効率のよい固液反応させ、効率良く固形化合物を生成さ
せる。また蒸気とアルカリ性薬剤の気送空気とが接触す
る周囲においても同様に微細水滴を発生させ、微細水滴
と酸性ガスとアルカリ性薬剤が瞬時共存する状態が形成
され、固液反応によりアルカリ性薬剤の反応効率を向上
させる。さらに、水蒸気によりアルカリ性薬剤を効果的
に分散させることができ、酸性ガスとアルカリ粉末との
接触面積を増大させて固気反応を促進させることができ
る。このように排ガス中でアルカリ性薬剤近傍に高圧の
蒸気を吹き込むことができるので、大口径で大流量の排
ガスダクト内であっても、効果的にアルカリ性薬剤を分
散させて反応効率を向上させることができる。As described above, according to the present invention, high-pressure steam is blown in the vicinity of the blowing portion of the powdered alkaline chemical or powdered alkaline chemical is blown in the vicinity of the high-pressure steam blown into the exhaust gas. By supplying it, it is flashed by the rapid depressurizing action of steam to generate fine water droplets in a very short time (instantaneous), and then react with water droplets with hydrogen chloride, etc., which easily reacts with water with an acid gas, to form an aqueous solution. The aqueous solution is brought into contact with an alkaline agent to make a solid-liquid reaction more efficient than a solid-gas reaction, thereby efficiently producing a solid compound. Similarly, fine water droplets are generated around the area where the vapor comes into contact with the pneumatic air of the alkaline chemical, and a state in which the fine water droplet, the acidic gas and the alkaline chemical coexist instantaneously is formed, and the reaction efficiency of the alkaline chemical by solid-liquid reaction. Improve. Further, the alkaline agent can be effectively dispersed by the steam, and the solid-gas reaction can be promoted by increasing the contact area between the acidic gas and the alkaline powder. Since high-pressure steam can be blown into the vicinity of the alkaline agent in the exhaust gas in this way, even in a large-diameter and large-flow exhaust gas duct, it is possible to effectively disperse the alkaline agent and improve the reaction efficiency. it can.
【図１】本発明に係る薬剤供給ノズルの第１の実施の形
態を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a first embodiment of a medicine supply nozzle according to the present invention.
【図２】同薬剤供給ノズルの配置を示す構成図である。FIG. 2 is a configuration diagram showing an arrangement of the medicine supply nozzle.
【図３】本発明に係る薬剤供給ノズルの第２の実施の形
態を示す縦断面図である。FIG. 3 is a vertical sectional view showing a second embodiment of the medicine supply nozzle according to the present invention.
【図４】本発明に係る薬剤供給ノズルの第３の実施の形
態を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing a third embodiment of a medicine supply nozzle according to the present invention.
【図５】同薬剤供給ノズルの実験を説明する配置図であ
る。FIG. 5 is a layout diagram illustrating an experiment of the medicine supply nozzle.
【図６】同薬剤供給ノズルの実験結果を示す脱塩率を示
すグラフである。FIG. 6 is a graph showing a desalination rate showing an experimental result of the chemical supply nozzle.
４，２１，３１ 薬剤供給ノズル ５ バグフィルタ １１ 排ガスダクト １２，２２，３２ 内筒部 １２ａ２２ａ，３２ａ 噴射口 １３，２３，３３ 外筒部 １３ａ，３３ａ 噴射口 ２３ａ 噴射孔 １５ 蒸気供給管 １６ 薬剤気送管 4,21,31 Chemical supply nozzle 5 Bag filter 11 Exhaust gas duct 12,22,32 Inner cylinder part 12a22a, 32a Injection port 13,23,33 Outer cylinder part 13a, 33a Injection port 23a Injection hole 15 Steam supply pipe 16 Chemical vapor Transmission
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−301018（ＪＰ，Ａ) 特開 平７−241437（ＪＰ，Ａ) 特開 平４−114718（ＪＰ，Ａ) 特開 昭50−150675（ＪＰ，Ａ) 実開 平８−1062（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/34 ────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-5-301018 (JP, A) JP-A-7-241437 (JP, A) JP-A-4-114718 (JP, A) JP-A-50- 150675 (JP, A) Japanese Utility Model 8-1062 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) B01D 53/34
Claims (4)
て排ガス中にアルカリ性粉末薬剤を吹き込み、排ガス中
の塩類と反応させて固形化合物を生成する脱硫・脱塩用
粉末薬剤供給ノズルであって、 軸心部に配置されて先端部に噴射口を有し基端部に薬剤
気送管が接続された内筒部と、 この記内筒部の外周に配置されて先端部に噴射口を有し
基端部に高圧蒸気を供給する蒸気接続管が接続された外
筒部とを備え、前記内筒部から噴射されたアルカリ性粉末薬剤の周囲
で、外筒部から噴射された高圧蒸気を排ガスダクトの減
圧作用によりフラッシュさせ、極短時間に生成された微
細な水滴を接触させることにより、排ガス中の塩類とア
ルカリ性粉末薬剤とを固液反応させるように構成した こ
とを特徴とする脱硫・脱塩用粉末薬剤供給ノズル。1. A disposed on the upstream side exhaust gas duct of the dust collecting device blowing an alkaline powder medicament in the exhaust gas, is reacted with salts in the exhaust gas desulfurization and powdered medicine supply nozzle desalination to produce a solid Compound There is an injection port at the distal end , which is located at the axial center, and has a drug at the proximal end.
An inner cylinder portion to which a pneumatic pipe is connected, and an injection port disposed at the outer periphery of the inner cylinder portion and having a front end portion.
An outer cylinder portion connected to a steam connection pipe for supplying high-pressure steam to a base end portion, around an alkaline powder medicine injected from the inner cylinder portion.
To reduce high-pressure steam injected from the outer cylinder to the exhaust gas duct.
Flash by pressure action, the fines generated in a very short time
By contacting fine water droplets, salts and
A powder drug supply nozzle for desulfurization and desalination, wherein the powder drug nozzle is configured to cause a solid-liquid reaction with a powdery powdery drug.
旋回筒部と、先端部で先端側ほど内径が広がる噴射口を
設け、 外筒部に、先端部で先端側ほど内径が広がる環状の噴射
口を設けた ことを特徴とする請求項１記載の脱硫・脱塩
用粉末薬剤供給ノズル。 2. The powder medicine is swirled at the base end of the inner cylinder.
The revolving cylinder and the injection port whose inner diameter increases toward the tip at the tip
An annular jet is provided on the outer cylinder, the inner diameter of which increases toward the tip at the tip.
The desulfurization and desalination according to claim 1, wherein a mouth is provided.
Nozzle for powder medicine supply.
て排ガス中にアルカリ性粉末薬剤を吹き込み、排ガス中
の塩類と反応させて固形化合物を生成する脱硫・脱塩用
粉末薬剤供給ノズルであって、 軸心部に配置されて先端部に噴射口を有し基端部に薬剤
気送管が接続された内筒部と、 この内筒部の外周に配置されて先端部で中心側ほど凹む
テーパ部に複数の噴射孔が形成され、基端部に高圧蒸気
を供給する蒸気接続管が接続された外筒部とを備え、 外周側から噴射された高圧蒸気により、内筒部から噴射
されたアルカリ性粉末 薬剤を攪拌するとともに、高圧蒸
気を排ガスダクトの減圧作用によりフラッシュさせ、極
短時間に生成された微細な水滴を接触させることによ
り、排ガス中の塩類とアルカリ性粉末薬剤とを固液反応
させるように構成した ことを特徴とする脱硫・脱塩用粉
末薬剤供給ノズル。 3. An exhaust gas duct upstream of the dust collector is provided.
The alkaline powder chemical into the exhaust gas
For desulfurization and desalination by forming solid compounds by reacting with salts
A powder medicine supply nozzle, which is arranged at the axial center, has an injection port at the tip, and has a medicine at the base.
An inner cylinder portion to which the pneumatic pipe is connected, and which is arranged on the outer periphery of the inner cylinder portion and is concave toward the center at the distal end portion
Multiple injection holes are formed in the tapered part, and high-pressure steam is
And an outer cylinder connected to a steam connection pipe for supplying steam, and is injected from the inner cylinder by high-pressure steam injected from the outer peripheral side.
While stirring the alkaline powder medicine
The air is flushed by the decompression effect of the exhaust gas duct,
By contacting fine water droplets generated in a short time
And solid-liquid reaction between salts in exhaust gas and alkaline powder chemicals
Desulfurization and desalting powder characterized by being configured to
Powder supply nozzle.
て排ガス中にアルカリ性粉末薬剤を吹き込み、排ガス中
の塩類と反応させて固形化合物を生成する脱硫・脱塩用
粉末薬剤供給ノズルであって、 軸心部に配置されて、高圧蒸気が供給されるとともに内
径が小さく形成された蒸気接続管が接続された大きい直
径の内筒部と、 この内筒部の外周に配置されて先端部に環状の噴射口が
形成された基端部に薬剤気送管が接続された外筒部とを
備え、 前記噴射口から噴射されたアルカリ性粉末薬剤中に、拡
散されて吹き込まれた高圧蒸気を排ガスダクトの減圧作
用によりフラッシュさせ、極短時間に生成された微細な
水滴を接触させることにより、排ガス中の塩類とアルカ
リ性粉末薬剤とを固液反応させるように構成した ことを
特徴とする脱硫・脱塩用粉末薬剤供給ノズル。 4. An exhaust gas duct disposed upstream of a dust collecting device.
The alkaline powder chemical into the exhaust gas
For desulfurization and desalination by forming solid compounds by reacting with salts
A powder drug supply nozzle, which is arranged at the center of the shaft to supply high-pressure steam and
A large straight line connected to a steam connection pipe with a small diameter
An inner cylindrical portion having a diameter and an annular injection port disposed at an outer periphery of the inner cylindrical portion and having a distal end portion.
The outer tube part connected to the pneumatic tube is connected to the formed base end.
In the alkaline powder medicine injected from the injection port.
The high-pressure steam that has been scattered and blown is used to reduce the pressure in the exhaust gas duct.
Flash by using the fine
By contacting water droplets, salts and
That a solid-liquid reaction with
A powder chemical supply nozzle for desulfurization and desalination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28719596A JP3340329B2 (en) | 1996-10-30 | 1996-10-30 | Powder chemical supply nozzle for desulfurization and desalination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28719596A JP3340329B2 (en) | 1996-10-30 | 1996-10-30 | Powder chemical supply nozzle for desulfurization and desalination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10128060A JPH10128060A (en) | 1998-05-19 |
| JP3340329B2 true JP3340329B2 (en) | 2002-11-05 |
Family
ID=17714309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28719596A Expired - Fee Related JP3340329B2 (en) | 1996-10-30 | 1996-10-30 | Powder chemical supply nozzle for desulfurization and desalination |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3340329B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007098187A (en) * | 2005-09-30 | 2007-04-19 | Dowa Holdings Co Ltd | Waste treatment system and exhaust gas treatment method |
| BE1021596B9 (en) * | 2013-06-25 | 2018-06-18 | Lhoist Rech Et Developpement Sa | METHOD AND DEVICE FOR TREATING GAS BY INJECTION OF PULVERULENT COMPOUND. |
| CN108284035A (en) * | 2018-03-26 | 2018-07-17 | 中国华电科工集团有限公司 | A kind of system and method preventing spray tip fouling |
| KR102307704B1 (en) * | 2019-11-29 | 2021-09-30 | 주식회사 포스코 | Apparuatus for removing dust in blast furnace gas |
-
1996
- 1996-10-30 JP JP28719596A patent/JP3340329B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10128060A (en) | 1998-05-19 |
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