JP3057878U - Dry desulfurization, denitration, desalination, DXN dust removal equipment - Google Patents
Dry desulfurization, denitration, desalination, DXN dust removal equipmentInfo
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- JP3057878U JP3057878U JP1998007750U JP775098U JP3057878U JP 3057878 U JP3057878 U JP 3057878U JP 1998007750 U JP1998007750 U JP 1998007750U JP 775098 U JP775098 U JP 775098U JP 3057878 U JP3057878 U JP 3057878U
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- denitration
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Abstract
(57)【要約】
【課題】 排ガス中に含まれるダイオキシン類（ＤＸ
Ｎ）、ダスト、塩化水素（ＨＣｌ）、窒素酸化物（ＮＯ
ｘ）及び硫黄酸化物（ＳＯｘ）の低減除去に関し、乾式
にて高効率の一括低減除去を計るとともに構成機構の簡
素化を計ることにより全体的コストダウンを計る。
【解決手段】 炉より発生したガスを冷却装置→この考
案の乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置の順にほぼ１６
０℃から１８０℃のガス温度範囲で処理する。構成機構
の簡素化ができたことにより全体的コストダウンがで
き、かつ乾式にて種々の有害物質の排出が一括して抑制
できた。
(57) [Summary] [Problem] Dioxins (DX) contained in exhaust gas
N), dust, hydrogen chloride (HCl), nitrogen oxides (NO
Regarding the reduction and removal of x) and sulfur oxides (SOx), the overall cost is reduced by performing high-efficiency batch reduction and removal in a dry system and simplifying the configuration mechanism. SOLUTION: The gas generated from the furnace is cooled in the order of a cooling device → a dry desulfurization denitrification demineralization / DXN dedusting device of the present invention in the order of 16 units.
The treatment is performed in a gas temperature range of 0 ° C. to 180 ° C. The simplification of the construction mechanism has reduced the overall cost, and has enabled the dry process to suppress the emission of various harmful substances at once.
Description
【０００１】[0001]
この考案は、排ガス中に含まれるダイオキシン類（ＤＸＮ）、ダスト、塩化水 素（ＨＣｌ）、窒素酸化物（ＮＯｘ）及び硫黄酸化物（ＳＯｘ）の低減除去に関 し、乾式にて高効率の一括低減除去を計るとともに構成機構の簡素化も計ること により全体的コストダウンを行う手段に関する。 This invention is a dry-type, highly efficient method for reducing and removing dioxins (DXN), dust, hydrogen chloride (HCl), nitrogen oxides (NOx) and sulfur oxides (SOx) contained in exhaust gas. The present invention relates to a means for reducing the overall cost by simultaneously reducing and eliminating the components and simplifying the configuration mechanism.
【０００２】[0002]
図２の如く炉１１より発生したガスは、まず熱交換器１５を通過させることに よりガス温度をほぼ２５０℃から３５０℃の範囲に低下させる。次に、サイクロ ン１６及び乾式電気集塵機１７を通過させることによりガス中のダストを除去す る。次に、排煙処理塔１８を通過させることによりガス中の塩化水素（ＨＣｌ） 及び硫黄酸化物（ＳＯｘ）を除去する。この際、大量の水と中和剤をガス中に噴 霧してガス温度をほぼ４０℃から８０℃の範囲に低下させる。蒸発しなかった水 は、排水処理設備２３に回され浄化して再利用される。 As shown in FIG. 2, the gas generated from the furnace 11 is first passed through the heat exchanger 15 to lower the gas temperature from approximately 250 ° C. to 350 ° C. Next, the dust in the gas is removed by passing through a cyclone 16 and a dry electric precipitator 17. Next, hydrogen chloride (HCl) and sulfur oxides (SOx) in the gas are removed by passing the gas through the flue gas treatment tower 18. At this time, a large amount of water and a neutralizing agent are sprayed into the gas to lower the gas temperature from approximately 40 ° C to 80 ° C. The water that has not evaporated is sent to a wastewater treatment facility 23 where it is purified and reused.
【０００３】 次に、湿式電気集塵機１９を通過させることによりガス中の中和剤と反応した 固形物及び残存ダストを除去して煙突より放出する。サイクロン１６及び乾式電 気集塵機１７の使用材質はガス温度が高いので普通鋼のＳＳ４００やＳＵＳ３０ ４で充分であるが、排煙処理塔１８以後の湿式電気集塵機１９，誘引ファン２０ 及びそれらの間の接続配管には高価な高耐食性材質が要求される。次に、熱交換 器１５にて生成させた高温空気を排ガス中に混入させて再び高温排ガスにして、 脱硝装置２１にて窒素酸化物（ＮＯｘ）を低減除去してから煙突２２より大気中 へ排出される。またサイクロン１６から乾式電気集塵機１７間のほぼ２５０℃か ら３５０℃のガス温度範囲というのは、有害物質であるダイオキシン類（ＤＸＮ ）を生成する条件を満足している。[0003] Next, the solid matter and the residual dust that have reacted with the neutralizing agent in the gas are removed by passing the gas through a wet electrostatic precipitator 19, and are discharged from the chimney. The material used for the cyclone 16 and the dry-type electric dust collector 17 is sufficient to use SS400 or SUS304 of ordinary steel because the gas temperature is high. However, the wet-type electric dust collector 19, the induction fan 20 and the intervening fan 20 after the flue gas treatment tower 18 are sufficient. An expensive high corrosion resistant material is required for the connection pipe. Next, the high-temperature air generated by the heat exchanger 15 is mixed into the exhaust gas to make it a high-temperature exhaust gas again. The nitrogen oxides (NOx) are reduced and removed by the denitration device 21 and then the air is discharged from the chimney 22 to the atmosphere. Is discharged. Further, the gas temperature range of approximately 250 ° C. to 350 ° C. between the cyclone 16 and the dry electric precipitator 17 satisfies the condition for generating harmful dioxins (DXN).
【０００４】[0004]
【考案が解決しようとする課題】 排ガス中に含まれるダイオキシン類（ＤＸＮ）、ダスト、塩化水素（ＨＣｌ） 、窒素酸化物（ＮＯｘ）及び硫黄酸化物（ＳＯｘ）の低減除去に関し、乾式にて 高効率の一括低減除去を計るとともに構成機構の簡素化も計ることにより全体的 コストダウンを行うものである。[Problems to be Solved by the Invention] Regarding the reduction and removal of dioxins (DXN), dust, hydrogen chloride (HCl), nitrogen oxides (NOx) and sulfur oxides (SOx) contained in exhaust gas, a dry method is used. The overall cost will be reduced by simultaneously reducing and eliminating the efficiency and simplifying the components.
【０００５】[0005]
炉より発生した排ガスを冷却装置またはボイラー→考案の乾式脱硫脱硝脱塩脱 ＤＸＮ除塵装置の順にほぼ１６０℃から１８０℃のガス温度範囲で処理する。 Exhaust gas generated from the furnace is treated in the order of a cooling device or a boiler → a devised dry desulfurization / denitration / demineralization / DXN dust removal device in a gas temperature range of approximately 160 ° C. to 180 ° C.
【０００６】[0006]
図１は、炉１１より発生した排ガスを冷却装置またはボイラー１２を通過させ ることにより、排ガス温度を一気にほぼ１６０℃から１８０℃の範囲まで急速冷 却する。次に接続ダクト２９内に消石灰注入装置２５及び活性炭粉又は活性コー クス粉注入装置２６を用い、消石灰粉及び活性炭粉又は活性コークス粉を注入す る。ガス中の水分量が多い場合は、消石灰粉に珪藻土粉などの助剤を混合させる 。消石灰粉とは、塩化水素（ＨＣｌ）と硫黄酸化物（ＳＯｘ）を反応させ、塩化 水素（ＨＣｌ）は塩化カルシウム（ＣａＣｌ2 ）と水（Ｈ2 Ｏ）に分解され硫黄 酸化物（ＳＯｘ）は亜硫酸カルシウム（ＣａＳＯ3 ）と水（Ｈ2 Ｏ）に分解され る。活性炭粉又はコークス粉とはダイオキシン類（ＤＸＮ）と硫黄酸化物（ＳＯ ｘ）を吸着反応させることを目的とする。In FIG. 1, the exhaust gas generated from the furnace 11 is passed through a cooling device or a boiler 12 to rapidly cool the exhaust gas temperature from about 160 ° C. to 180 ° C. at once. Next, slaked lime powder and activated carbon powder or activated coke powder are injected into the connection duct 29 using the slaked lime powder injection device 25 and activated carbon powder or activated coke powder injection device 26. If the water content in the gas is high, mix auxiliaries such as diatomaceous earth powder with slaked lime powder. With slaked lime powder, hydrogen chloride (HCl) and sulfur oxide (SOx) are reacted, and hydrogen chloride (HCl) is decomposed into calcium chloride (CaCl 2 ) and water (H 2 O), and sulfur oxide (SOx) is decomposed. It is decomposed into calcium sulfite (CaSO 3 ) and water (H 2 O). The purpose of activated carbon powder or coke powder is to cause a dioxin (DXN) and a sulfur oxide (SOx) to undergo an adsorption reaction.
【０００７】 次にこの考案の乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置１３のろ過式集塵装置部３ ０のろ布２７にて反応後の消石灰粉、活性炭粉又は活性コークス粉、ダストは捕 集される。この際、排ガスのろ布２７を通過する速度は、反応時間などを考慮し てほぼ０．８ｍ／ｍｉｎから１．５ｍ／ｍｉｎの範囲以下が望ましい。またこの 段階での除去率は、ダイオキシン類（ＤＸＮ）は９５％以上、塩化水素（ＨＣｌ ）は９８％以上は、硫黄酸化物（ＳＯｘ）は９０％以上、ダストは９９％以上が 確保できる。Next, slaked lime powder, activated carbon powder or activated coke powder, and dust after the reaction are collected by the filter cloth 27 of the filtration type dust collection unit 30 of the dry desulfurization, denitration, desalination, and desalination DXN dust removal apparatus 13 of the present invention. Is done. At this time, the speed at which the exhaust gas passes through the filter cloth 27 is preferably in the range of approximately 0.8 m / min to 1.5 m / min in consideration of the reaction time and the like. At this stage, dioxins (DXN) can secure 95% or more, hydrogen chloride (HCl) 98% or more, sulfur oxide (SOx) 90% or more, and dust 99% or more.
【０００８】 次に、クリーンルーム１４内にアンモニア注入装置２４を用いてアンモニアガ スを注入する。窒素酸化物（ＮＯｘ）とアンモニアガスは活性炭又は活性コーク ス吸着装置部３１で活性炭又は活性コークスを触媒として反応し、窒素酸化物（ ＮＯｘ）は窒素（Ｎ2 ）と水（Ｈ2 Ｏ）に分解される。この反応による脱硝率は ８０％以上が確保できる。Next, ammonia gas is injected into the clean room 14 using the ammonia injection device 24. Nitrogen oxide (NOx) and ammonia gas react in the activated carbon or activated coke adsorber unit 31 using activated carbon or activated coke as a catalyst, and nitrogen oxide (NOx) is converted into nitrogen (N 2 ) and water (H 2 O). Decomposed. A denitration rate of 80% or more can be secured by this reaction.
【０００９】 前段のろ過式集塵装置部３０を通過したダイオキシン類（ＤＸＮ）、硫黄酸化 物（ＳＯｘ）及びダストはさらにこの活性炭又は活性コークス吸着装着部３１に て吸着される。この考案の乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置１３の全体低減除 去率としては、ダイオキシン類（ＤＸＮ）は９９．９％以上、塩化水素（ＨＣｌ ）は９８％以上、硫黄酸化物（ＳＯｘ）は９９．９％以上、窒素酸化物（ＮＯｘ ）は８０％以上、ダストは９９．９％以上が確保できる。[0009] The dioxins (DXN), sulfur oxides (SOx) and dust that have passed through the filtration type dust collector unit 30 at the preceding stage are further adsorbed by the activated carbon or activated coke adsorption mounting unit 31. The total reduction and removal rate of the dry desulfurization, denitration, desalination, and DXN dedusting apparatus 13 according to the present invention are 99.9% or more for dioxins (DXN), 98% or more for hydrogen chloride (HCl), and sulfur oxide (SOx). 99.9% or more, nitrogen oxide (NOx) 80% or more, and dust 99.9% or more.
【００１０】 ダイオキシン類（ＤＸＮ）の再合成防止や活性炭又は活性コークスの吸着能力 の関係で、この考案の乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置１３の入口排ガス温度 をほぼ１６０℃から１８０℃の範囲に維持することは重要であるので、この考案 の装置１３の入口温度が高温側に対して不安定な場合は、温度センサー３３を取 付け、温度状況に合わせ電動ダンパー３２を開度調整し、吸込空気量によって温 度コントロールする必要がある。[0010] In view of the prevention of resynthesis of dioxins (DXN) and the ability to adsorb activated carbon or activated coke, the exhaust gas temperature at the inlet of the dry desulfurization, denitration, desalination, and DXN dedusting device 13 of the present invention is in the range of approximately 160 to 180 ° C. Therefore, if the inlet temperature of the device 13 of the present invention is unstable with respect to the high temperature side, a temperature sensor 33 is attached, and the electric damper 32 is adjusted in opening according to the temperature condition. It is necessary to control the temperature by the amount of intake air.
【００１１】 この考案の乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置１３は、ろ過式集塵装置部３０ と活性炭又は活性コークス吸着装置部を一体化することにより、装置全体の熱損 失を制御し、活性炭又は活性コークス吸着装置部での排ガス温度をほぼ１４０℃ から１５０℃の範囲内に正確にコントロールすることができ、活性炭又は活性コ ークスの吸着能力を最大限に発揮するものである。The dry desulfurization, denitration, desalination, and DXN dedusting apparatus 13 of the present invention controls the heat loss of the entire apparatus by integrating the filtration type dust collecting unit 30 and the activated carbon or activated coke adsorption unit. The temperature of the exhaust gas at the activated carbon or activated coke adsorption unit can be accurately controlled within a range of approximately 140 ° C to 150 ° C, and the activated carbon or activated coke adsorption capacity is maximized.
【００１２】 この考案の乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置１３には活性炭粉又は活性コー クス粉や活性炭又は活性コークスの静電気による発火事故防止のため、接地線２ ８の取付が望ましい。活性炭と活性コークスの使い分けは機能上は特にないがラ ンニングコストの観点からみれば活性コークスを使用した方が望ましい。また、 使用材質としては、腐食性ガスは事前に反応吸着されるためＳＳ４００程度で充 分に耐えられるものである。In the dry desulfurization, denitration, desalination, and DXN dedusting apparatus 13 of the present invention, it is desirable to attach a ground wire 28 to prevent a fire accident due to static electricity of activated carbon powder or activated coke powder or activated carbon or activated coke. Activated carbon and activated coke do not have any particular function, but it is preferable to use activated coke from the viewpoint of running costs. In addition, the corrosive gas used is a material that can withstand a sufficient charge of about SS400 because it is reactively adsorbed in advance.
【００１３】 この考案の乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置１３において脱硫と除塵のみを 主目的とする場合は、アンモニア注入装置２４、消石灰注入装置２５及び活性炭 粉又は活性コークス粉注入装置２６は不要である。脱硝と除塵のみを主目的とす る場合は、活性炭粉又は活性コークス粉注入装置２６は不要であるが排ガス中の 硫黄酸化物（ＳＯｘ）は窒素酸化物（ＮＯｘ）とアンモニアガスとの反応の弊害 となるので硫脱効果の高い消石灰注入装置２５は必要である。脱塩、脱ＤＸＮと 除塵のみを主目的とする場合は、アンモニア注入装置２４は不要である。いずれ の場合も前述の低減除去率は確保できるものである。[0013] In the dry desulfurization, denitration, desalination, and desalination DXN dedusting device 13 of the present invention, when only desulfurization and dust removal are the main purposes, the ammonia injection device 24, the slaked lime injection device 25, and the activated carbon powder or activated coke powder injection device 26 are unnecessary. It is. When the main purpose is only for denitration and dust removal, the activated carbon powder or activated coke powder injection device 26 is unnecessary, but the sulfur oxides (SOx) in the exhaust gas is the reaction gas between the nitrogen oxides (NOx) and the ammonia gas. Therefore, a slaked lime injection device 25 having a high desulfurization effect is required. When the main purpose is only for desalination, DXN removal and dust removal, the ammonia injection device 24 is unnecessary. In any case, the above-mentioned reduced removal rate can be secured.
【００１４】[0014]
この考案による乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置は、排ガス中に含まれるダ イオキシン類（ＤＸＮ）、ダスト、塩化水素（ＨＣｌ）、窒素酸化物（ＮＯｘ） 及び硫黄酸化物（ＳＯｘ）を乾式にて同時に高効率で一括低減除去し、かつ構成 機構の簡素化を計ることにより全体的コストダウンができるものである。 The dry desulfurization, denitration, desalination, and DXN dedusting equipment according to the present invention can dry dioxins (DXN), dust, hydrogen chloride (HCl), nitrogen oxides (NOx) and sulfur oxides (SOx) contained in exhaust gas. At the same time, the overall cost can be reduced by simultaneously reducing and removing the batch with high efficiency and simplifying the configuration mechanism.
【図１】この考案の装置を使用した構成図である。FIG. 1 is a configuration diagram using the device of the present invention.
【図２】従来型の湿式除去装置の構成図である。FIG. 2 is a configuration diagram of a conventional wet removal apparatus.
１１ 炉 １２ 冷却装置またはボイラー １３ この考案の乾式脱硫脱硝脱塩脱ＤＸＮ除塵装置 １４ クリーンルーム １５ 熱交換器 １６ サイクロン １７ 乾式電気集塵機 １８ 排煙処理塔 １９ 湿式電気集塵機 ２０ 誘引ファン ２１ 脱硝装置 ２２ 煙突 ２３ 排水処理設備 ２４ アンモニア注入装置 ２５ 消石灰注入装置 ２６ 活性炭粉又は活性コークス粉注入装置 ２７ ろ布 ２８ 接地線 ２９ 接続ダクト ３０ ろ過式集塵装置部 ３１ 活性炭又は活性コークス吸着装置部 ３２ 電動ダンパー ３３ 温度センサー DESCRIPTION OF SYMBOLS 11 Furnace 12 Cooling device or boiler 13 Dry desulfurization denitrification demineralization DXN dedusting device of this invention 14 Clean room 15 Heat exchanger 16 Cyclone 17 Dry electric dust collector 18 Smoke exhaust tower 19 Wet electric dust collector 20 Induction fan 21 Denitration device 22 Chimney 23 Wastewater treatment equipment 24 Ammonia injection device 25 Slaked lime injection device 26 Activated carbon powder or activated coke powder injection device 27 Filter cloth 28 Ground wire 29 Connection duct 30 Filtration type dust collector unit 31 Activated carbon or activated coke adsorption unit 32 Electric damper 33 Temperature sensor
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ０１Ｄ 53/68 (72)考案者 清水 志郎 栃木県栃木市国府町１番地 三井鉱山株式 会社 栃木事業所内Continued on the front page (51) Int.Cl. 6 Identification code FI B01D 53/68 (72) Inventor Shiro Shimizu 1 Kokufucho, Tochigi City, Tochigi Prefecture Mitsui Mining Co., Ltd. Tochigi Works
Claims (1)
性コークス粉、消石灰粉及びアンモニアガスを使用し、
ろ過式集塵装置と活性炭又は活性コークス吸着装置を一
体化した装置。An activated carbon powder or activated coke powder, slaked lime powder and ammonia gas are used as additives to exhaust gas,
A device that integrates a filtration type dust collector and an activated carbon or activated coke adsorption device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1998007750U JP3057878U (en) | 1998-09-21 | 1998-09-21 | Dry desulfurization, denitration, desalination, DXN dust removal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1998007750U JP3057878U (en) | 1998-09-21 | 1998-09-21 | Dry desulfurization, denitration, desalination, DXN dust removal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3057878U true JP3057878U (en) | 1999-06-08 |
Family
ID=43191803
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1998007750U Expired - Lifetime JP3057878U (en) | 1998-09-21 | 1998-09-21 | Dry desulfurization, denitration, desalination, DXN dust removal equipment |
Country Status (1)
| Country | Link |
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| JP (1) | JP3057878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020084925A1 (en) | 2018-10-24 | 2020-04-30 | 三菱重工エンジニアリング株式会社 | Gas purification device, ship with same, and gas purification method |
-
1998
- 1998-09-21 JP JP1998007750U patent/JP3057878U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020084925A1 (en) | 2018-10-24 | 2020-04-30 | 三菱重工エンジニアリング株式会社 | Gas purification device, ship with same, and gas purification method |
| US11439942B2 (en) | 2018-10-24 | 2022-09-13 | Mitsubishi Heavy Industries Engineering, Ltd. | Gas purification apparatus, ship including the same, and gas purification method |
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